A self-heating steel part low-magnification inspection, grinding and pickling integrated system and use method

Abstract

A self-heating steel part low-magnification inspection grinding and pickling integrated system and use method belong to the technical field of steel continuous casting. The system comprises a gantry belt machine, a heat collection subsystem, a low-magnification pickling subsystem and a condensation subsystem. The heat collection subsystem comprises a water storage tank and a heat exchange support platform; the low-magnification pickling subsystem comprises a pickling box, a clean water tank, a cold acid storage tank, a hot acid storage tank and a waste liquid collection tank, and a ring heating pipe is installed in the pickling box; the condensation subsystem comprises a condensation box, a condensation water inlet flow control valve and a condensation water outlet flow control valve. The present invention can not only realize the steel part grinding and pickling functions of low-magnification hot acid corrosion, cold acid corrosion and dendrite corrosion inspection, but also rely on heat exchange plates and cooling water to exchange heat during the steel part grinding stage, continuously cool the high-temperature steel parts, and collect heat at the same time. When performing hot acid corrosion inspection, the collected heat can be used to heat the hot acid corrosion liquid, thereby realizing effective recovery and reuse of heat resources.

Description

Technical Field

[0001] The invention relates to the technical field of steel continuous casting, and in particular to a self-heating steel part low-magnification inspection, grinding and pickling integrated system and a use method thereof. Background Art

[0002] In the steel production process, steel companies use low-magnification (macro) inspection methods to evaluate the performance and quality of continuous casting billets, ingots or steel specimens. Low-magnification inspection methods mainly include sulfur print inspection, cold acid corrosion, hot acid corrosion, electrolytic corrosion and dendrite corrosion inspection methods. Sulfur print inspection is a reaction between the dilute sulfuric acid aqueous solution on the photographic paper and the sulfide on the specimen to generate hydrogen sulfide gas, which then reacts with the silver bromide on the photographic paper to generate silver sulfide precipitation, which is printed on the corresponding position of the photographic paper, and the solidification structure and defect morphology on the specimen are displayed by brown or black spots. The principles of the other four inspection methods are basically similar, all of which rely on electrochemical reactions to selectively corrode the inspection surface of the specimen to reveal defects and dendrite structures of different morphologies. For most high-end steel grades, the sulfur content in the steel is low, and the effect of sulfur print inspection is poor; the electrolytic corrosion method requires additional equipment investment. At present, steel companies generally use cold acid corrosion, hot acid corrosion and dendrite corrosion inspection methods to conduct low-magnification inspections on steel parts.

[0003] Before using the corrosive liquid to corrode the steel parts, it is necessary to grind the surface of the steel parts to be inspected for a long time to make it meet the roughness requirements of the low-magnification inspection method. However, in the process of grinding the surface of the steel parts using a grinding wheel grinder or a belt grinder, long-term grinding will cause the temperature of the steel parts to rise rapidly, which will reduce the grinding efficiency and bring safety hazards to the handling and pickling operations of the steel parts after grinding. Moreover, the cold acid corrosion and dendrite corrosion inspection methods require that they be carried out at room temperature, and the temperature of the steel parts after grinding is usually above 200°C, resulting in the inability of the quality inspection department to timely and accurately feedback the quality information of the steel parts. The hot acid corrosion inspection method requires the temperature range of the corrosive liquid to be 60-80°C. The current technology at home and abroad is to directly or indirectly use electric energy to heat the corrosive liquid. Therefore, simply cooling the continuously polished steel parts without recycling the heat is a waste of heat resources generated by the grinding process.

[0004] Chinese patent application CN109211646A discloses a corrosion test device for low-magnification inspection of dendrite corrosion; Chinese patent application CN208688898U discloses an integrated equipment for metallographic inspection and polishing of dendrite corrosion. The above two patents respectively realize the design schemes of grinding and polishing of dendrite corrosion inspection method and pickling operation of steel parts, but they do not integrate grinding and polishing with pickling operation, and their equipment cannot complete the function of cooling steel parts during cold acid corrosion or dendrite corrosion, and heating hot acid corrosion liquid during hot acid corrosion. Chinese patent application CN103033519A discloses a low-magnification pickling and sample imaging automation integrated system, which can realize sulfur printing inspection, hot acid corrosion and cold acid corrosion inspection of samples, but this system does not include the grinding link of the sample, and does not clearly explain the heating method of hot acid corrosion liquid, so it is impossible to realize the heat recovery of high-temperature specimens. In addition, the hot acid low-magnification corrosion devices used by domestic and foreign steel enterprises and scientific research institutes all use electric energy to directly or indirectly heat the corrosion liquid, which requires additional energy consumption. Therefore, it is necessary to design a self-heating steel part low-magnification inspection grinding and pickling integrated system that can not only cool the high-temperature steel parts after grinding during the low-magnification inspection of steel parts, but also selectively use the heat collected during the cooling process for hot acid corrosion, cold acid corrosion or dendrite corrosion inspection of steel parts. Summary of the invention

[0005] In order to solve the problem that in the low-magnification inspection process of steel parts in the prior art, it is necessary to cool the high-temperature steel parts after grinding, and in the hot acid corrosion inspection, it is necessary to consume additional electricity to heat the hot acid corrosion liquid through heat exchange with the high-temperature steel parts, the present invention provides a self-heating steel parts low-magnification inspection grinding and pickling integrated system and use method, which realizes the steel parts grinding and pickling functions of low-magnification hot acid corrosion, cold acid corrosion and dendrite corrosion inspection. Moreover, in the stage of grinding steel parts, heat is exchanged with cooling water by relying on the heat exchange plate to continuously cool the high-temperature steel parts, and heat is collected at the same time. When conducting hot acid corrosion inspection, the collected heat can be used to heat the hot acid corrosion liquid, realizing the effective recycling and reuse of heat resources.

[0006] In order to achieve the above object, the technical solution of the present invention is:

[0007] A self-heating steel low-power inspection grinding and pickling integrated system includes a gantry belt sander, a heat collection subsystem, a low-power pickling subsystem and a condensation subsystem; the heat collection subsystem includes a water storage tank and a heat exchange support platform, the heat exchange support platform is placed under the gantry belt sander, the water storage tank is connected to the water inlet of the heat exchange support platform through a water pipe, a water inlet pump and a main water inlet valve are installed on the water pipe connecting the water storage tank and the heat exchange support platform, and the heat exchange support platform is placed under the gantry belt sander. The water outlet at the end is connected to the low-multiple pickling subsystem and the condensing subsystem through a water pipe; the low-multiple pickling subsystem includes a pickling tank, a clean water tank, a cold acid storage tank, a hot acid storage tank and a waste liquid collection tank, the clean water tank, the cold acid storage tank and the hot acid storage tank are placed on the same side of the pickling tank, the clean water tank is equipped with a clean water port inserted into the pickling tank, the cold acid storage tank is equipped with a cold acid corrosion liquid input port inserted into the pickling tank, the hot acid storage tank is equipped with a hot acid corrosion liquid input port inserted into the pickling tank, the pickling tank A ring heating pipe is installed in the middle, one end of the ring heating pipe is connected to the water inlet of the pickling box, a pickling water inlet flow control valve is installed at the water inlet of the pickling box, the other end is connected to the water outlet of the pickling box, a pickling water outlet flow control valve is installed at the water outlet, a waste liquid outlet is opened at the side bottom of the pickling box, the waste liquid outlet is connected to the waste liquid collection box through a waste liquid outlet pipe, and a waste liquid flow control valve is installed on the waste liquid outlet pipe; the condensation subsystem includes a condensation box, a condensation water inlet flow control valve and a condensation water outlet flow control valve, the condensation water inlet flow control valve is installed on the water pipe connected to the water inlet of the condensation box, the condensation water outlet flow control valve is installed on the water pipe connected to the water outlet of the condensation box, the water pipe on which the condensation water outlet flow control valve is installed and the water pipe on which the pickling box water outlet flow control valve is installed are connected to the circulating waterway, a main drain valve is arranged on one side of the circulating waterway, a circulating water pump and a circulating water control valve are arranged on the other side, and the ports on which the circulating water pump and the circulating water control valve are installed are connected back to the water pipe connecting the water storage tank and the heat exchange support platform.

[0008] Furthermore, the heat exchange support platform is composed of a heat exchange plate, a reinforced steel structure and a support platform. The heat exchange plate is made of graphite and is in contact with the polished steel parts. The heat exchange plate has a hollow annular heat exchange cavity, which is S-shaped. Both ends of the annular heat exchange cavity are connected to water pipes. The reinforced steel structure is embedded in the heat exchange plate, and both ends of the reinforced steel structure are welded to both sides of the support platform.

[0009] Furthermore, the hot acid liquid storage tank stores hot acid etching liquid, and the cold acid liquid storage tank stores cold acid etching liquid or dendrite etching liquid.

[0010] Furthermore, the upper end of the pickling box is provided with a heat-insulating cover, a loading rack is installed inside the box, and the loading rack is placed above the annular heating tube.

[0011] Furthermore, a condensate tank water inlet is opened on the upper surface of the condensate tank body, a condensate tank water inlet pipe is installed at the condensate water inlet, a condensate tank drain port is opened on the side of the condensate tank body, a condensate tank outlet pipe is installed at the condensate tank drain port, and the condensate tank outlet pipe is connected to the sewer to discharge the condensate into the sewer.

[0012] The method for using the self-heating steel part low-magnification inspection, grinding and pickling integrated system is as follows:

[0013] (1) When conducting hot acid corrosion inspection

[0014] First, open the main water inlet valve, the pickling water inlet flow control valve and the pickling water outlet flow control valve, close the circulating water control valve, the condensing water inlet flow control valve, the condensing water outlet flow control valve, the waste liquid flow control valve and the main drain valve, close the circulating water pump, and open the water inlet pump; after the cooling water fills the circulating water circuit, close the main water inlet valve and the water inlet pump, open the circulating water control valve and the circulating water pump, and ensure that the flow path of the circulating water in this integrated system is from the heat collection subsystem to the low-multiple pickling subsystem first, and finally returns to the heat collection subsystem;

[0015] The corrosive liquid in the hot acid storage tank is injected into the pickling box from the hot acid corrosive liquid inlet, and the insulation cover of the pickling box is closed; the steel parts are placed on the upper part of the heat exchange support platform of the heat collection subsystem, and the steel parts are polished. The cooling water enters the annular heat exchange cavity in the heat exchange plate in the heat exchange support platform through the water pipe. The heat exchange plate exchanges heat with the high-temperature steel parts, and at the same time exchanges heat with the cooling water in the annular heat exchange cavity of the heat exchange plate. The high-temperature steel parts cool down, and the cooling water heats up. The high-temperature water flows into the pickling box of the low-multiple pickling subsystem from the water outlet of the heat exchange support platform, and passes through the annular heating pipe; the corrosive liquid in the pickling box exchanges heat with the high-temperature water in the annular heating pipe, the corrosive liquid heats up, and the high-temperature water cools down. The water flow entering the pickling box is controlled by adjusting the pickling water inlet control valve and the pickling water outlet control valve, and then the heating speed of the corrosive liquid is regulated to ensure that the temperature of the hot acid corrosive liquid is within the range required by the hot acid corrosion test; the high-temperature water heats the corrosive liquid and then cools it down, and then returns to the heat collection subsystem and heats up again, and flows into the low-multiple pickling subsystem to continue heating the corrosive liquid;

[0016] After the corrosive liquid reaches the temperature required for the hot acid corrosion test, the steel parts are polished, the circulating water pump, the circulating water control valve and the pickling water inlet control valve are turned off, the insulation cover is opened, the steel parts to be pickled are placed on the loading rack of the pickling box, the insulation cover is closed, and the steel parts are subjected to hot acid corrosion inspection; 30 minutes after the hot acid corrosion inspection requires, the surface of the steel parts and the pickling box are cleaned with clean water in the clean water tank, and the hot acid corrosion inspection is completed; the waste liquid flow control valve is opened to discharge the used corrosive liquid into the waste liquid collection box, and the main drain valve is opened to drain the water in the circulating pipeline.

[0017] (2) When cold acid corrosion or dendrite corrosion testing is performed

[0018] First, open the main water inlet valve, condensing water inlet flow control valve and condensing water outlet flow control valve, close the circulating water control valve, pickling water inlet flow control valve, pickling water outlet flow control valve, waste liquid flow control valve and main drain valve, close the circulating water pump, and open the water inlet pump; after the cooling water fills the circulating water circuit, close the main water inlet valve and the water inlet pump, open the circulating water control valve and the circulating water pump, and ensure that the flow path of the circulating water in this integrated system is from the heat collection subsystem to the condensing subsystem first, and finally returns to the heat collection subsystem, and always keep the insulation cover of the pickling box open;

[0019] The steel parts are placed on the upper part of the heat exchange support platform in the heat collection subsystem and polished; the cooling water enters the annular heat exchange cavity in the heat exchange plate in the heat exchange support platform through the water pipe, and the heat exchange plate exchanges heat with the high-temperature steel parts, and at the same time exchanges heat with the cooling water in the annular heat exchange cavity of the heat exchange plate, the high-temperature steel parts are cooled down, the cooling water is heated up, and the high-temperature water flows into the condensation tube of the condensation subsystem from the water outlet end of the heat exchange support platform; room temperature cooling water is always injected into the condensation box of the condensation subsystem through the condensation box water injection pipe, the cooling water in the condensation box exchanges heat with the high-temperature water from the heat collection subsystem in the condensation tube, and the cooling water in the condensation box is discharged from the condensation box outlet pipe after heat exchange; the high-temperature water in the condensation tube of the condensation box is cooled down to become low-temperature water, and returns to the heat collection subsystem again to cool the high-temperature steel parts;

[0020] After the steel parts are polished and the temperature of the steel parts reaches room temperature, turn off the circulating water pump, circulating water control valve, and condensing water inlet control valve, and stop injecting cooling water into the condensing box; place the steel parts to be tested on the loading rack in the pickling box, and inject the corrosive liquid in the cold acid storage tank into the pickling box from the cold acid corrosive liquid inlet port to corrode the surface of the steel parts to be tested, and complete the cold acid corrosion or dendrite corrosion inspection of the steel parts; finally, use the clean water in the clean water tank to clean the surface of the steel parts and the pickling box; open the waste liquid control valve to discharge the used corrosive liquid into the waste liquid collection box, and open the main drain valve to drain the water in the circulating pipeline.

[0021] Beneficial effects of the present invention:

[0022] The present invention can not only realize the steel grinding and pickling functions for low-power hot acid corrosion, cold acid corrosion and dendrite corrosion inspections, but also rely on heat exchange plates and cooling water to exchange heat during the steel grinding stage, continuously cool the high-temperature steel parts, and collect heat at the same time. When conducting hot acid corrosion inspections, the collected heat can be used to heat the hot acid corrosion liquid, thereby realizing effective recovery and reuse of heat resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the self-heating steel part low-magnification inspection, grinding and pickling integrated system provided by the present invention;

[0024] Figure 2It is the water flow path of the self-heating steel part low-power inspection, grinding and pickling integrated system provided by the present invention;

[0025] Figure 3 This is a working principle diagram of the self-heating steel parts low-power inspection, grinding and pickling integrated system provided by the present invention;

[0026] Figure 4 This is a front view of the heat exchange support platform of the heat collection subsystem provided by the present invention;

[0027] Figure 5 is a top view of a heat exchange support platform of a heat collection subsystem provided by the present invention;

[0028] Figure 6 This is a front view of the pickling box of the low-magnification pickling subsystem provided by the present invention;

[0029] Figure 7 It is a top view of the pickling box of the low-magnification pickling subsystem provided by the present invention;

[0030] Figure 8 This is a front view of a condensation box of a condensation subsystem provided by the present invention;

[0031] Fig. 9 It is a top view of the condensation box of the condensation subsystem provided by the present invention.

[0032] The reference numerals in the drawings of the specification include:

[0033] 1. Gantry belt sander; 2. Sanding belt; 3. Steel parts; 4. Water storage tank; 5. Water inlet pump; 6. Heat exchange support platform; 7. Pickling tank; 8. Condensation tank; 9. Waste liquid collection tank; 10. Pickling water inlet flow control valve; 11. Condensation water inlet flow control valve; 12. Waste liquid outlet pipe; 13. Waste liquid flow control valve; 14. Water pipe; 15. Heat exchange plate; 16. Annular heat exchange cavity; 17. Reinforced steel structure; 18. Support platform; 19. Clean water tank; 20. Cold acid storage tank; 21. Hot acid storage tank; 22. Insulation cover; 23. Loading rack; 24. Ring heating pipe; 25. Drain pipe; 26. Clean water inlet; 27. Cold acid corrosive liquid inlet; 28. Hot acid corrosive liquid inlet; 29. ​​Corrosive liquid; 30. Condenser tank water filling pipe; 31. Condenser tank water outlet pipe; 32. Condenser pipe; 33. Pickling water outlet flow control valve; 34. Condensate water outlet flow control valve; 35. Circulating water pump; 36. Main water inlet valve; 37. Circulating water control valve; 38. Main drain valve. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0035] like Figures 1 to 9As shown, a self-heating steel low-magnification inspection grinding and pickling integrated system includes a gantry belt sander 1, a heat collection subsystem, a low-magnification pickling subsystem and a condensation subsystem; the heat collection subsystem includes a water storage tank 4 and a heat exchange support platform 6, the heat exchange support platform 6 is placed below the gantry belt sander 1, the water storage tank 4 is connected to the water inlet of the heat exchange support platform 6 through a water pipe 14, the heat exchange support platform 6 is composed of a heat exchange plate 15, a reinforcement steel structure 17 and a support platform 18, the heat exchange plate 15 is made of graphite and is in contact with the polished steel part 3, the heat exchange plate 15 has a hollow annular heat exchange cavity 16, the annular heat exchange cavity 16 is S-shaped, both ends of the annular heat exchange cavity 16 are connected to the water pipe 14, the reinforcement steel structure 17 is embedded in the heat exchange plate 15, and both ends of the reinforcement steel structure 17 are welded It plays the role of supporting steel parts on both sides of the object-carrying platform 18. A water inlet pump 5 and a main water inlet valve 36 are installed on the water pipe 14 of the connecting section between the water tank and the heat exchange support platform. The water outlet at the other end of the heat exchange support platform 6 is connected to the low-magnification pickling subsystem and the condensation subsystem through the water pipe 14; the low-magnification pickling subsystem includes a pickling tank 7, a clean water tank 19, a cold acid storage tank 20, a hot acid storage tank 21 and a waste liquid collection tank 9. The clean water tank 19, the cold acid storage tank 20 and the hot acid storage tank 21 are placed on the same side of the pickling tank 7. According to the requirements of low-magnification inspection, hot acid corrosive liquid is stored in the hot acid storage tank 21, and cold acid corrosive liquid or dendrite corrosive liquid is stored in the cold acid storage tank 20. The clean water inlet 26 is placed in the pickling tank 7 and passes through the wall of the pickling tank and is installed on the clean water tank 19. The cold acid corrosive liquid The input port 27 is placed in the pickling box 7 and is installed on the cold acid storage tank 20 through the pickling box wall. The hot acid corrosive liquid input port 28 is placed in the pickling box 7 and is installed on the hot acid storage tank 21 through the pickling box wall. An annular heating pipe 24 is installed in the pickling box 7. The upper end of the pickling box 7 is provided with a heat preservation cover 22. A carrier 23 is installed inside the box body. The carrier 23 is placed above the annular heating pipe 24. One end of the annular heating pipe 24 is connected to the water inlet of the pickling box 7. A pickling water inlet control valve 10 is installed at the water inlet of the pickling box 7, and the other end is connected to the water outlet of the pickling box. A pickling water outlet control valve 33 is installed at the water outlet. A waste liquid port is opened at the bottom of the side of the pickling box 7. The waste liquid port is connected to the waste liquid collection box through the waste liquid outlet pipe 12. A waste liquid flow control valve 13 is installed on the waste liquid outlet pipe 12. The condensation subsystem includes a condensation tank 8, a condensation water inlet flow control valve 11 and a condensation water outlet flow control valve 34. The condensation water inlet flow control valve 11 is installed on a water pipe 14 connected to the water inlet of the condensation tank 8, and the condensation water outlet flow control valve 34 is installed on a water pipe 14 connected to the water outlet of the condensation tank 8. The water pipe 14 on which the condensation water outlet flow control valve 34 is installed and the water pipe on which the pickling tank outlet flow control valve 33 is installed are connected to a circulating waterway. A main drain valve 38 is provided on one side of the circulating waterway, and a circulating water pump 35 and a circulating water control valve 37 are installed on the other side. The ports on which the circulating water pump 35 and the circulating water control valve 37 are installed are connected back to the water pipe 14 connecting the water storage tank 4 and the heat exchange support platform 6. The function of the circulating water pump 35 and the circulating water control valve 37 is to close this section of the waterway when water is injected from the water storage tank.When the water circuit is circulating, the circulating water pump 35 works to circulate the water discharged from the low-multiple pickling subsystem or the condensation subsystem to the heat collection subsystem; the upper surface of the condensation tank 8 is provided with a condensation water injection port, and a condensation tank injection pipe 30 is installed at the condensation water injection port. The condensation tank 8 is provided with a condensation tank drain port on the side of the condensation tank 8, and a condensation tank outlet pipe 31 is installed at the condensation tank drain port. The condensation tank outlet pipe 31 is connected to the sewer to discharge the condensed water into the sewer. ;

[0036] A method of using a self-heating steel low-power inspection grinding and pickling integrated system is as follows:

[0037] (1) When conducting hot acid corrosion inspection

[0038] In this embodiment, the abrasive belt 2 of the gantry abrasive belt machine 1 is used to grind the steel part 3, and a hot acid corrosion test is performed on the steel part 3. The steel part 3 is a round steel billet with a diameter of φ650 mm and a thickness of 30 mm.

[0039] First, open the main water inlet valve 36, the pickling water inlet flow control valve 10 and the pickling water outlet flow control valve 33, close the circulating water control valve 37, the condensing water inlet flow control valve 11, the condensing water outlet flow control valve 34, the waste liquid flow control valve 13 and the main drain valve 38, close the circulating water pump 35, and open the water inlet pump 5. After the cooling water fills the circulating water circuit, close the main water inlet valve 36 and the water inlet pump 5, open the circulating water control valve 37 and the circulating water pump 35. Ensure that the flow path of the circulating water in this integrated system is to first enter the low-multiple pickling subsystem from the heat collection subsystem, and finally return to the heat collection subsystem. The corrosive liquid of the hot acid storage tank 21 is injected into the pickling box 7 from the hot acid corrosive liquid input port 28, and the insulation cover 22 of the pickling box 7 is closed.

[0040] The steel part 3 is placed on the upper part of the heat exchange support platform 6 in the heat collection subsystem, and the steel part 3 is polished. The cooling water enters the annular heat exchange cavity 16 in the heat exchange plate 15 in the heat exchange support platform 6 through the water pipe 14. The heat exchange plate 15 exchanges heat with the high-temperature steel part 3, and at the same time exchanges heat with the cooling water in the annular heat exchange cavity 16 of the heat exchange plate 15. The high-temperature steel part 3 is cooled down, and the cooling water is heated up. The high-temperature water flows from the water outlet of the heat exchange support platform 6 into the pickling tank 7 of the low-multiple pickling subsystem, and passes through the annular heating pipe 24. The corrosive liquid in the pickling tank 7 exchanges heat with the high-temperature water in the annular heating pipe 24. The corrosive liquid is heated up, and the high-temperature water is cooled down. The water flow entering the pickling tank 7 is controlled by adjusting the pickling water inlet control valve 10 and the pickling water outlet control valve 33, and then the heating rate of the corrosive liquid is regulated to ensure that the temperature of the hot acid corrosive liquid is within the range required by the hot acid corrosion test. The high-temperature water heats the corrosive liquid and then cools down. It returns to the heat collection subsystem and heats up again, and flows into the low-multiple pickling subsystem to continue heating the corrosive liquid.

[0041] After the corrosive liquid reaches the temperature required for the hot acid corrosion test, the grinding of the steel part 3 is completed, the circulating water pump 35, the circulating water control valve 37, and the pickling water inlet control valve 10 are closed, the insulation cover 22 is opened, and the steel part 3 to be pickled is placed on the loading rack 23 of the pickling box 7, and the insulation cover 22 is closed. The steel part 3 is subjected to the hot acid corrosion test. After the hot acid corrosion test requires 30 minutes, the surface of the steel part 3 and the pickling box 7 are cleaned with clean water in the clean water tank 19. The hot acid corrosion test is completed. Open the waste liquid control valve 13 to discharge the used corrosive liquid into the waste liquid collection box 9. Open the main drain valve 38 to drain the water in the circulation pipeline.

[0042] In this embodiment, after grinding the steel part 3 for about 40 minutes, the temperature of the hot acid corrosion liquid in the pickling tank 7 of the low-magnification pickling subsystem reaches 60°C, and the surface to be tested of the steel part 3 meets the hot acid corrosion test requirements. The steel part 3 is corroded in the corrosion liquid in the pickling tank 7 for 40 minutes, and the hot acid corrosion pickling is completed.

[0043] (2) When conducting cold acid or dendrite corrosion inspection

[0044] In this embodiment, the sanding belt 2 of the gantry sanding machine 1 is used to grind the steel part 3, and the cold acid or dendrite corrosion test is performed on the steel part 3. The size of the steel part 3 is a slab of 1000mm×300mm×30mm. When the cold acid or dendrite corrosion test is used, the corrosion liquid does not need to be heated.

[0045] First, open the main water inlet valve 36, the condensing water inlet flow control valve 11 and the condensing water outlet flow control valve 34, close the circulating water control valve 37, the pickling water inlet flow control valve 10, the pickling water outlet flow control valve 33, the waste liquid flow control valve 13 and the main drain valve 38, close the circulating water pump 35, and open the water inlet pump 36. After the cooling water fills the circulating water circuit, close the main water inlet valve 36 and the water inlet pump 5, and open the circulating water control valve 37 and the circulating water pump 35. Ensure that the flow path of the circulating water in this integrated system is from the heat collection subsystem to the condensing subsystem first, and then return to the heat collection subsystem. Always keep the insulation cover 22 of the pickling box 7 open.

[0046] The steel part 3 is placed on the upper part of the heat exchange support platform 6 in the heat collection subsystem, and the steel part 3 is polished. The cooling water enters the annular heat exchange cavity 16 in the heat exchange plate 15 in the heat exchange support platform 6 through the water pipe 14. The heat exchange plate 15 exchanges heat with the high-temperature steel part 3, and at the same time exchanges heat with the cooling water in the annular heat exchange cavity 16 of the heat exchange plate 15. The high-temperature steel part 3 is cooled down, and the cooling water is heated up. The high-temperature water flows into the condenser pipe 32 of the condensation subsystem from the water outlet of the heat exchange support platform 6. Room temperature cooling water is always injected into the condensation tank 8 of the condensation subsystem through the condensation tank water injection pipe 30. The cooling water in the condensation tank 8 exchanges heat with the high-temperature water from the heat collection subsystem in the condensation pipe 32, and the cooling water in the condensation tank 8 is discharged from the condensation tank outlet pipe 31 after heat exchange. The high-temperature water in the condensation pipe 32 of the condensation tank 8 is cooled down to become low-temperature water, and returns to the heat collection subsystem again to cool the high-temperature steel part 3.

[0047] After the grinding of the steel part 3 is completed and the temperature of the steel part 3 reaches room temperature, turn off the circulating water pump 35, the circulating water control valve 37, and the condensing water inlet control valve 11, and stop injecting cooling water into the condensing tank 8. The steel part 3 to be tested is placed on the carrier 23 in the pickling box 7, and the corrosive liquid in the cold acid storage tank 20 is injected into the pickling box 7 from the cold acid corrosive liquid inlet 27 to corrode the surface of the steel part 3 to be tested, and complete the cold acid corrosion or dendrite corrosion inspection of the steel part 3. Finally, use the clean water in the clean water tank 19 to clean the surface of the steel part 3 and the pickling box 7. Open the waste liquid control valve 13 to discharge the used corrosive liquid into the waste liquid collection box 9. Open the main drain valve 38 to drain the water in the circulation pipeline.

[0048] In this embodiment, the grinding time of the steel part 3 is about 20 minutes, after which the circulating water circuit continues to cool the steel part 3 for about 30 minutes, and the steel part 3 reaches room temperature, and is pickled using a cold acid etching solution.

Claims

1. A self-heating steel parts low-power inspection, grinding and pickling integrated system, characterized in that: The invention comprises a gantry belt sander, a heat collection subsystem, a low-multiple acid washing subsystem and a condensing subsystem; the heat collection subsystem comprises a water storage tank and a heat exchange support platform, the heat exchange support platform is placed under the gantry belt sander, the water storage tank is connected to the water inlet of the heat exchange support platform through a water delivery pipe, a water inlet pump and a main water inlet valve are installed on the water delivery pipe of the connecting section between the water storage tank and the heat exchange support platform, and the water outlet at the other end of the heat exchange support platform is connected to the low-multiple acid washing subsystem and the condensing subsystem through the water delivery pipe. The low-multiple pickling subsystem includes a pickling tank, a clean water tank, a cold acid storage tank, a hot acid storage tank and a waste liquid collection tank. The clean water tank, the cold acid storage tank and the hot acid storage tank are placed on the same side of the pickling tank. The clean water inlet is placed in the pickling tank and is installed on the clean water tank through the pickling tank wall. The cold acid corrosive liquid inlet is placed in the pickling tank and is installed on the cold acid storage tank through the pickling tank wall. The hot acid corrosive liquid inlet is placed in the pickling tank and is installed on the hot acid storage tank through the pickling tank wall. An annular heating pipe is installed in the washing box, one end of the annular heating pipe is connected to the water inlet of the pickling box, a pickling water inlet flow control valve is installed at the water inlet of the pickling box, the other end is connected to the water outlet of the pickling box, a pickling water outlet flow control valve is installed at the water outlet, a waste liquid outlet is opened at the side bottom of the pickling box, the waste liquid outlet is connected to the waste liquid collecting box through a waste liquid outlet pipe, and a waste liquid flow control valve is installed on the waste liquid outlet pipe; the condensation subsystem comprises a condensation box, a condensation water inlet flow control valve and a condensation water outlet flow control valve, the condensation water inlet flow control valve is installed on a water pipe connected to the water inlet of the condensation box, the condensation water outlet flow control valve is installed on a water pipe connected to the water outlet of the condensation box, the water pipe on which the condensation water outlet flow control valve is installed and the water pipe on which the pickling box outlet water control valve is installed are connected to the circulating waterway, a main drain valve is arranged on one side of the circulating waterway, a circulating water pump and a circulating water control valve are arranged on the other side, and the ports on which the circulating water pump and the circulating water control valve are installed are connected back to the water pipe connecting the water storage tank and the heat exchange support platform.

2. The self-heating steel parts low-power inspection, grinding and pickling integrated system according to claim 1 is characterized in that: The heat exchange support platform is composed of a heat exchange plate, a reinforced steel structure and a support platform. The heat exchange plate is made of graphite and is in contact with the polished steel parts. The heat exchange plate has a hollow annular heat exchange cavity, which is S-shaped. Both ends of the annular heat exchange cavity are connected to water pipes. The reinforced steel structure is embedded in the heat exchange plate, and both ends of the reinforced steel structure are welded to both sides of the support platform.

3. The self-heating steel parts low-power inspection, grinding and pickling integrated system according to claim 1 is characterized in that: The hot acid liquid storage tank stores hot acid etching liquid, and the cold acid liquid storage tank stores cold acid etching liquid or dendrite etching liquid.

4. The self-heating steel parts low-power inspection, grinding and pickling integrated system according to claim 1 is characterized in that: The upper end of the pickling box is equipped with a heat preservation cover, and a loading rack is installed inside the box body, and the loading rack is placed above the annular heating pipe.

5. The self-heating steel parts low-power inspection, grinding and pickling integrated system according to claim 1 is characterized in that: A condensate tank water inlet is provided on the upper surface of the condensate tank body, a condensate tank water inlet pipe is installed at the condensate water inlet, a condensate tank drain port is provided on the side of the condensate tank body, a condensate tank outlet pipe is installed at the condensate tank drain port, and the condensate tank outlet pipe is connected to the sewer to discharge the condensate into the sewer.

6. The method for using the self-heating steel low-power inspection, grinding and pickling integrated system according to claim 1 is characterized in that: The following steps are involved: (1) When conducting hot acid corrosion inspection First, open the main water inlet valve, the pickling water inlet flow control valve and the pickling water outlet flow control valve, close the circulating water control valve, the condensing water inlet flow control valve, the condensing water outlet flow control valve, the waste liquid flow control valve and the main drain valve, close the circulating water pump, and open the water inlet pump; after the cooling water fills the circulating water circuit, close the main water inlet valve and the water inlet pump, open the circulating water control valve and the circulating water pump, and ensure that the flow path of the circulating water in this integrated system is from the heat collection subsystem to the low-multiple pickling subsystem first, and finally returns to the heat collection subsystem; The corrosive liquid in the hot acid storage tank is injected into the pickling box from the hot acid corrosive liquid inlet, and the insulation cover of the pickling box is closed; the steel parts are placed on the upper part of the heat exchange support platform of the heat collection subsystem, and the steel parts are polished. The cooling water enters the annular heat exchange cavity in the heat exchange plate in the heat exchange support platform through the water pipe. The heat exchange plate exchanges heat with the high-temperature steel parts, and at the same time exchanges heat with the cooling water in the annular heat exchange cavity of the heat exchange plate. The high-temperature steel parts cool down, and the cooling water heats up. The high-temperature water flows into the pickling box of the low-multiple pickling subsystem from the water outlet of the heat exchange support platform, and passes through the annular heating pipe; the corrosive liquid in the pickling box exchanges heat with the high-temperature water in the annular heating pipe, the corrosive liquid heats up, and the high-temperature water cools down. The water flow entering the pickling box is controlled by adjusting the pickling water inlet control valve and the pickling water outlet control valve, and then the heating speed of the corrosive liquid is regulated to ensure that the temperature of the hot acid corrosive liquid is within the range required by the hot acid corrosion test; the high-temperature water heats the corrosive liquid and then cools it down, and then returns to the heat collection subsystem and heats up again, and flows into the low-multiple pickling subsystem to continue heating the corrosive liquid; After the corrosive liquid reaches the temperature required for the hot acid corrosion test, the steel parts are polished, the circulating water pump, the circulating water control valve and the pickling water inlet control valve are turned off, the insulation cover is opened, the steel parts to be pickled are placed on the load rack of the pickling box, the insulation cover is closed, and the steel parts are subjected to hot acid corrosion test; after the hot acid corrosion test requires 30 minutes, the surface of the steel parts and the pickling box are cleaned with clean water in the clean water tank, and the hot acid corrosion test is completed; Open the waste liquid flow control valve to drain the used corrosive liquid into the waste liquid collection box, and open the main drain valve to drain the water in the circulation pipeline; (2) When cold acid corrosion or dendrite corrosion testing is performed First, open the main water inlet valve, condensing water inlet flow control valve and condensing water outlet flow control valve, close the circulating water control valve, pickling water inlet flow control valve, pickling water outlet flow control valve, waste liquid flow control valve and main drain valve, close the circulating water pump, and open the water inlet pump; after the cooling water fills the circulating water circuit, close the main water inlet valve and the water inlet pump, open the circulating water control valve and the circulating water pump, and ensure that the flow path of the circulating water in this integrated system is from the heat collection subsystem to the condensing subsystem first, and finally returns to the heat collection subsystem, and always keep the insulation cover of the pickling box open; The steel parts are placed on the upper part of the heat exchange support platform in the heat collection subsystem and polished; the cooling water enters the annular heat exchange cavity in the heat exchange plate in the heat exchange support platform through the water pipe, and the heat exchange plate exchanges heat with the high-temperature steel parts, and at the same time exchanges heat with the cooling water in the annular heat exchange cavity of the heat exchange plate, the high-temperature steel parts are cooled down, the cooling water is heated up, and the high-temperature water flows into the condensation tube of the condensation subsystem from the water outlet end of the heat exchange support platform; room temperature cooling water is always injected into the condensation box of the condensation subsystem through the condensation box water injection pipe, the cooling water in the condensation box exchanges heat with the high-temperature water from the heat collection subsystem in the condensation tube, and the cooling water in the condensation box is discharged from the condensation box outlet pipe after heat exchange; the high-temperature water in the condensation tube of the condensation box is cooled down to become low-temperature water, and returns to the heat collection subsystem again to cool the high-temperature steel parts; After the steel parts are polished and the temperature of the steel parts reaches room temperature, turn off the circulating water pump, circulating water control valve, and condensing water inlet control valve, and stop injecting cooling water into the condensing box; place the steel parts to be tested on the loading rack in the pickling box, and inject the corrosive liquid in the cold acid storage tank into the pickling box from the cold acid corrosive liquid inlet port to corrode the surface of the steel parts to be tested, and complete the cold acid corrosion or dendrite corrosion inspection of the steel parts; finally, use the clean water in the clean water tank to clean the surface of the steel parts and the pickling box; open the waste liquid control valve to discharge the used corrosive liquid into the waste liquid collection box, and open the main drain valve to drain the water in the circulating pipeline.

Images