A method for cleaning a platinum crucible for water jet polishing of a surface

Abstract

The present application relates to a kind of water jet polishing surface platinum crucible cleaning method.The scheme is: with vacuum flip chuck (15) suction crucible (14) outer bottom or inner bottom, nozzle (10) is aimed at crucible inner surface or outer surface any point, with water jet respectively washes the inner wall, outer wall, inner bottom and outer bottom of crucible (14), complete first cleaning;With hot air and normal temperature air blow dry, weigh the mass of first cleaning after crucible (14), record as m1 gram;Repeat second cleaning, and the mass of repeated cleaning crucible is weighed again, record as m2;The difference of m1-m2 is calculated, when the difference <0.001 gram, stop cleaning;When the difference >0.001 gram, repeat cleaning until the difference <0.001 gram, stop cleaning;Pure water flushing, dry, obtain clean crucible.The present application has no acid emission, environment-friendly, improve efficiency and reduce pollution error.

Description

Technical Field

[0001] This invention belongs to the technical field of platinum crucible cleaning for chemical analysis. Specifically, it relates to a method for cleaning platinum crucibles with water jet polished surfaces. Background Technology

[0002] Waterjet cutting, also known as water jet cutting, is a high-pressure water jet cutting technology that uses high-pressure water jets for cutting. X-ray fluorescence spectroscopy sample preparation involves placing sample powder and flux in a platinum crucible, melting them at high temperature, and then cooling to obtain a glassy solid solution. After the entire glass plate is removed, a small amount of residual molten material adheres to the inner wall and bottom of the platinum crucible, requiring cleaning before reuse. Currently, the conventional cleaning method involves heating and soaking the crucible in hydrochloric acid to dissolve the molten material, followed by rinsing with water. Incomplete cleaning of the platinum crucible can lead to cross-contamination, and reduced surface smoothness can affect the homogenization of the molten material, thus impacting the melting efficiency for reuse. Therefore, platinum crucibles require not only cleaning but also frequent polishing, and sometimes even remelting and refurbishment. Existing methods require the use of acid, which is not only time-consuming but also results in significant loss of smoothness on the inner wall of the platinum crucible after cleaning. Furthermore, subjective judgment of the crucible's cleanliness can easily lead to contamination errors.

[0003] The patented technology of "A Platinum Crucible Boiling and Cleaning Device" (CN202221198744.5) uses a platinum crucible boiling and cleaning device to overcome the current situation where the platinum crucible beaker is easily broken when boiling, which leads to the circuit board and heating wire being easily corroded by acid. At the same time, it solves the problem that the clamps are easy to scratch the bottom of the platinum crucible when it is picked up after boiling. However, the glassware is easy to break and the use of acid still exists.

[0004] The patented technology "A Platinum Crucible Cleaning Method" (CN202210808991.0) uses ultrasonic cleaning to improve the mobility of acid etching molecules, thereby improving cleaning efficiency, but it still involves operating in an acidic environment and using acid.

[0005] The patented technology "A Cleaning Method for Gold and Platinum Crucibles After High-Temperature Mineral Melting" (CN202210000329.2) proposes an ultrasonic cleaning method that utilizes the vibration of acid molecules under the action of sound waves to break the adsorption of dirt on the surface of the cleaned object, causing fatigue damage to the dirt layer and its removal. The vibration of gas bubbles scrubs the solid surface, which only improves the acid washing efficiency, but cannot avoid the use of acid, and the scrubbing cannot polish the surface of the crucible.

[0006] In summary, the existing technology has the following technical defects: it requires the use of acid to generate acidic discharge liquid, manual operation in an acidic environment is harmful to health, the cleaned platinum crucible loses its smoothness, thus reducing the mixing effect of the melting process, and subjective evaluation of the cleanliness of the platinum crucible may contaminate the next melting sample. Summary of the Invention

[0007] The present invention aims to overcome the defects of the prior art and provides a method for cleaning platinum crucibles with water jet polishing. This method can simultaneously polish and clean the surface of platinum crucibles, does not produce acidic liquid discharge, improves melting efficiency, avoids cross-contamination of platinum crucibles, and reduces testing errors.

[0008] To achieve the above objectives, the technical solution adopted by the present invention comprises the following steps:

[0009] For simplicity, the platinum crucible to be cleaned is referred to as the crucible.

[0010] The crucible cleaning method employs a "water jet platinum crucible cleaning device." The crucible dimensions are entered into the main control program of the water jet platinum crucible cleaning device to obtain a three-dimensional diagram of the crucible. Based on the three-dimensional diagram, the following operations are performed:

[0011] Step 1: Follow the steps below to hold the outer or inner bottom of the crucible with a vacuum rotating suction cup, and align the water jet nozzle with any point on the inner or outer surface of the crucible; set: the distance between the water jet nozzle and the crucible cleaning surface is 5-7 mm; the linear velocity of the crucible is 10-5 mm / sec; the water pressure is 30-20 MPa; the angle between the water jet direction and the inner and outer wall surfaces is 3-5°; and the angle between the water jet direction and the inner and outer bottom surfaces is -10 to +10°.

[0012] Use water jets to clean the inner wall, outer wall, inner bottom surface, and outer bottom surface of the crucible.

[0013] First cleaning completed;

[0014] Step 2: Control the crucible moving system and the rinsing and drying system, blow hot air and room temperature air for 60-90 seconds each, and weigh the crucible after the first cleaning and record it as m1 grams.

[0015] Step 3: Repeat step 1, and weigh the crucible after the second cleaning, and record the mass as m2.

[0016] Calculate the difference between m1 and m2. Stop cleaning when the difference is less than 0.001 grams.

[0017] When the difference is greater than 0.001 grams, repeat step 1 until the difference is less than 0.001 grams, then stop cleaning.

[0018] Step 4: Control the crucible movement system and the rinsing and drying system. Rinse the crucible 14 three times with pure water, and blow it with cold air and hot air for 60-90 seconds each to obtain a clean crucible.

[0019] The aforementioned water jet platinum crucible cleaning device consists of a programmable water jet system, a crucible moving system, and a rinsing and drying system.

[0020] The structure of the programmable water jet system is as follows: the output shaft of the water jet motor is connected to the input shaft of the high-pressure pump; the water jet tank is connected to the filter screen and the inlet of the high-pressure pump through a water pipe; the outlet of the high-pressure pump is connected to the inlet of the water jet nozzle; and the water jet nozzle is fixed directly above the electric lifting column by a fixing plate.

[0021] The crucible moving system is structured as follows: the top of the electric lifting column is fixedly connected to the lower surface of the plate; the upper parts of the front and rear sides of the electric angular displacement stage are hinged to the bottom of the front and rear sides of the guide rail via corresponding connecting rods; the electric slider is slidably connected to the guide rail; and the bottom of the electric rotating gripper is fixedly connected to the upper surface of the electric slider. The electric lifting column is directly driven by a lifting DC motor, and the electric angular displacement stage and the electric slider are both directly driven by their respective DC motors. The maximum distance the electric slider can move to the right along the guide rail is 80–110 mm, and the tilt angle of the guide rail is 0–30°.

[0022] The structure of the rinsing and drying system is as follows: the nozzle of the programmable electric heating blower is installed directly above the vacuum rotating suction cup, and the distance between the nozzle and the rotating shaft of the vacuum rotating suction cup is 50-100mm. A pure water nozzle is located directly below the vacuum rotating suction cup, and the pure water nozzle is connected to the pure water tank through the aquarium water pump. The distance from the axis of the nozzle to the upper surface of the vacuum rotating suction cup is 50-100mm, and the distance from the mouth of the pure water nozzle to the upper surface of the vacuum rotating suction cup is 50-100mm.

[0023] The crucible is a platinum crucible for fusion chemical analysis.

[0024] The water pressure of the water jet is adjustable from 10 to 30 MPa.

[0025] The electric rotary gripper can rotate 360° infinitely, with programmable speed adjustment; the gripping force is 1-5 kg.

[0026] The suction force of the vacuum flipping suction cup is 3-5 kg.

[0027] The programmable electric hair dryer has a heating power of 300-500W.

[0028] The aquarium water pump has a head of 300–1500 mm and a flow rate of 60–200 L / h.

[0029] The precision of the analytical balance is 0.1 mg.

[0030] The angle range of the electric angular displacement stage is ±15°.

[0031] By adopting the above technical solution, the present invention has the following positive effects compared with the prior art:

[0032] 1. This invention utilizes water jet grinding to remove molten material remaining on the bottom and walls of the platinum crucible. No acid is required, thus eliminating acid emissions and promoting emission reduction. Operation in an environment free of acidic solutions also benefits labor protection.

[0033] 2. This invention utilizes high-pressure water jets to grind away residues while simultaneously polishing the surface of the platinum crucible, ensuring a smooth surface that facilitates the flow and mixing of the molten material, thus improving melting efficiency.

[0034] 3. This invention evaluates the cleanliness of a platinum crucible by weighing the mass change after two consecutive cleaning and polishing processes. This avoids the impact of the previous cleaning cleanliness on the platinum crucible when it is reused, thus reducing contamination errors.

[0035] Therefore, this invention has the characteristics of no acidic emissions, environmental friendliness, and benefit to labor protection; it also improves melting efficiency and reduces pollution errors. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the structure of "a water jet platinum crucible cleaning device" used in this invention. Detailed Implementation

[0037] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the scope of protection thereof.

[0038] A method for cleaning platinum crucibles with waterjet polishing surfaces. The platinum crucible cleaning method described in this specific embodiment is as follows:

[0039] For simplicity, the platinum crucible to be cleaned is referred to as the crucible.

[0040] The crucible cleaning method employs a "water jet platinum crucible cleaning device". The dimensions of crucible 14 are written into the main control program of the water jet platinum crucible cleaning device to obtain a three-dimensional view of the crucible. Based on the three-dimensional view of the crucible, the following operations are performed:

[0041] Step 1: Follow the steps below to hold the outer or inner bottom of the crucible 14 with the vacuum flipping suction cup 15, and align the water jet nozzle 10 with any point on the inner or outer surface of the crucible; set: the distance between the water jet nozzle 10 and the crucible cleaning surface is 5-7 mm; the linear velocity of the crucible 14 is 10-5 mm / sec; the water pressure is 30-20 MPa; the angle between the water jet direction and the inner and outer wall surfaces is 3-5°; and the angle between the water jet direction and the inner and outer bottom surfaces is -10 to +10°.

[0042] The inner wall, outer wall, inner bottom surface, and outer bottom surface of crucible 14 were cleaned with water jets.

[0043] First cleaning completed;

[0044] Step 2: Control the crucible moving system and the rinsing and drying system, blow hot air and room temperature air for 60-90 seconds each, weigh the crucible 14 after the first cleaning, and record it as m1 grams.

[0045] Step 3: Repeat step 1, and weigh the crucible after the second cleaning, and record the mass as m2.

[0046] Calculate the difference between m1 and m2. Stop cleaning when the difference is less than 0.001 grams.

[0047] When the difference is greater than 0.001 grams, repeat step 1 until the difference is less than 0.001 grams, then stop cleaning.

[0048] Step 4: Control the crucible movement system and the rinsing and drying system. Rinse the crucible 14 three times with pure water, and blow it with cold air and hot air for 60-90 seconds each to obtain a clean crucible.

[0049] The gripping force of the electric rotating gripper 11 is 1-5 kg.

[0050] The suction force of the vacuum flipping suction cup 15 is 3-5 kg.

[0051] The programmable electric hair dryer 12 has a heating power of 300-500W.

[0052] The aquarium water pump 17 has a head of 300-1500 mm and a flow rate of 60-200 L / h.

[0053] In this specific implementation:

[0054] The aforementioned water jet platinum crucible cleaning device consists of a programmable water jet system, a crucible moving system, and a rinsing and drying system.

[0055] The structure of the programmable water jet system is as follows: the output shaft of the water jet motor 3 is connected to the input shaft of the high-pressure pump 4; the water jet tank 1 is connected to the filter screen 2 and the inlet of the high-pressure pump 4 through a water pipe; the outlet of the high-pressure pump 4 is connected to the inlet of the water jet nozzle 10; and the water jet nozzle 10 is fixed directly above the electric lifting column 5 by a fixing plate.

[0056] The crucible moving system is structured as follows: the top of the electric lifting column 5 is fixedly connected to the bottom surface of the plate 6; the upper parts of the front and rear sides of the electric angular displacement stage 7 are hinged to the bottom of the front and rear sides of the guide rail 8 via corresponding connecting rods; the electric slider 9 is slidably connected to the guide rail 8; and the bottom of the electric rotating gripper 11 is fixedly connected to the upper surface of the electric slider 9. The electric lifting column 5 is directly driven by a lifting DC motor, and the electric angular displacement stage 7 and the electric slider 9 are both directly driven by their respective DC motors. The maximum distance the electric slider 9 moves to the right along the direction of the guide rail 8 is 80-110 mm, and the tilt angle of the guide rail 8 is 0-30°.

[0057] The structure of the rinsing and drying system is as follows: the nozzle 13 of the programmable electric heating blower 12 is installed directly above the vacuum rotating suction cup 15, and the distance between the nozzle 13 and the rotating shaft of the vacuum rotating suction cup 15 is 50-100mm. A pure water nozzle 16 is provided directly below the vacuum rotating suction cup 15, and the pure water nozzle 16 is connected to the pure water tank 18 through the aquarium water pump 17. The distance from the axis of the nozzle 13 to the upper surface of the vacuum rotating suction cup 15 is 50-100mm, and the distance from the mouth of the pure water nozzle 16 to the upper surface of the vacuum rotating suction cup 15 is 50-100mm.

[0058] The crucible 14 is a platinum crucible for molten chemical analysis.

[0059] The maximum water pressure of the water jet nozzle 10 is 30 MPa.

[0060] The electric rotary gripper 11 can rotate 360° infinitely, with programmable speed adjustment.

[0061] The precision of the analytical balance is 0.1 mg.

[0062] The angle range of the electric angular displacement stage 7 is ±15°.

[0063] The details will not be repeated in the examples.

[0064] Example 1

[0065] A method for cleaning platinum crucibles with waterjet polished surfaces. The platinum crucible cleaning method described in this embodiment is as follows:

[0066] The crucible cleaning method employs a "water jet platinum crucible cleaning device". The dimensions of crucible 14 are written into the main control program of the water jet platinum crucible cleaning device to obtain a three-dimensional view of the crucible. Based on the three-dimensional view of the crucible, the following operations are performed:

[0067] Step 1: Follow the steps below to hold the outer or inner bottom of the crucible 14 with the vacuum flipping suction cup 15, and align the water jet nozzle 10 with any point on the inner or outer surface of the crucible; set: the distance between the water jet nozzle 10 and the crucible cleaning surface is 6mm; the linear velocity of the crucible 14 is 8mm / sec; the water pressure is 25Pa; the angle between the water jet direction and the inner and outer wall surfaces is 4°; and the angle between the water jet direction and the inner and outer bottom surfaces is 2°.

[0068] The inner wall, outer wall, inner bottom surface, and outer bottom surface of crucible 14 were cleaned with water jets.

[0069] First cleaning completed;

[0070] Step 2: Control the crucible moving system and the rinsing and drying system, blow hot air and room temperature air for 75 seconds each, weigh the crucible 14 after the first cleaning, record it as m1 grams, accurate to 0.0001 grams.

[0071] Step 3: Repeat step 1, and weigh the crucible after the second cleaning, and record the mass as m2, accurate to 0.0001 grams.

[0072] Calculate the difference between m1 and m2. In this embodiment, m1-m2 = 96.3563 - 96.3560 = 0.0003, that is, the difference between m1 and m2 is < 0.001 grams, so stop cleaning.

[0073] Step 4: Control the crucible movement system and the rinsing and drying system. Rinse the crucible 14 three times with pure water, and blow it with cold air and hot air for 80 seconds each to obtain a clean crucible.

[0074] In this embodiment:

[0075] The electric rotating gripper 11 has a gripping force of 3 kg.

[0076] The suction force of the vacuum flipping suction cup 15 is 4 kg.

[0077] The programmable electric hair dryer 12 has a heating power of 400W.

[0078] The aquarium water pump 17 has a head of 1000mm and a flow rate of 150L / h.

[0079] Example 2

[0080] A method for cleaning platinum crucibles with waterjet polished surfaces. The platinum crucible cleaning method described in this embodiment is as follows:

[0081] The crucible cleaning method employs a "water jet platinum crucible cleaning device". The dimensions of crucible 14 are written into the main control program of the water jet platinum crucible cleaning device to obtain a three-dimensional view of the crucible. Based on the three-dimensional view of the crucible, the following operations are performed:

[0082] Step 1: Follow the steps below to hold the outer or inner bottom of the crucible 14 with the vacuum flipping suction cup 15, and align the water jet nozzle 10 with any point on the inner or outer surface of the crucible; set: the distance between the water jet nozzle 10 and the crucible cleaning surface is 5mm; the linear velocity of the crucible 14 is 5mm / sec; the water pressure is 20MPa; the angle between the water jet direction and the inner and outer wall surfaces is 3°; and the angle between the water jet direction and the inner and outer bottom surfaces is -10°.

[0083] The inner wall, outer wall, inner bottom surface, and outer bottom surface of crucible 14 were cleaned with water jets.

[0084] First cleaning completed;

[0085] Step 2: Control the crucible movement system and the rinsing and drying system, blowing hot air and room temperature air for 60 seconds each, and weigh the crucible 14 after the first cleaning, recording the mass as m1 grams. Accurate to 0.0001 grams.

[0086] Step 3: Repeat step 1, and weigh the crucible after the second cleaning, and record it as m2, accurate to 0.0001 grams.

[0087] Calculate the difference between m1 and m2. In this embodiment: m1-m2=65.5243-65.5228=0.0015, that is, the difference between m1 and m2 is >0.001 grams, and washing needs to continue.

[0088] Repeat step 1 again, weigh the crucible after the third cleaning, and record it as m3, accurate to 0.0001 grams; in this embodiment: m2-m3=65.5228-655220=0.0008, that is, the difference between m2 and m2 is >0.001 grams, so stop cleaning.

[0089] Step 4: Control the crucible movement system and the rinsing and drying system. Rinse the crucible 14 three times with pure water, and blow it with cold air and hot air for 600 seconds each to obtain a clean crucible.

[0090] In this embodiment:

[0091] The gripping force of the electric rotating gripper 11 is 1 kg.

[0092] The suction force of the vacuum flipping suction cup 15 is 3 kg.

[0093] The programmable electric hair dryer 12 has a heating power of 300W.

[0094] The aquarium water pump 17 has a head of 300mm and a flow rate of 60L / h.

[0095] The angle range of the electric angular displacement stage 7 is -15°.

[0096] Example 3

[0097] A method for cleaning platinum crucibles with waterjet polished surfaces. The platinum crucible cleaning method described in this embodiment is as follows:

[0098] The crucible cleaning method employs a "water jet platinum crucible cleaning device". The dimensions of crucible 14 are written into the main control program of the water jet platinum crucible cleaning device to obtain a three-dimensional view of the crucible. Based on the three-dimensional view of the crucible, the following operations are performed:

[0099] Step 1: Follow the steps below to hold the outer or inner bottom of the crucible 14 with the vacuum flipping suction cup 15, and align the water jet nozzle 10 with any point on the inner or outer surface of the crucible; set: the distance between the water jet nozzle 10 and the crucible cleaning surface is 7mm; the linear velocity of the crucible 14 is 10mm / sec, the water pressure is 30MPa, the angle between the water jet direction and the inner and outer wall surfaces is 5°, and the angle between the water jet direction and the inner and outer bottom surfaces is +10°.

[0100] The inner wall, outer wall, inner bottom surface, and outer bottom surface of crucible 14 were cleaned with water jets.

[0101] First cleaning completed;

[0102] Step 2: Control the crucible moving system and the rinsing and drying system, blow hot air and room temperature air for 90 seconds each, weigh the crucible 14 after the first cleaning and record the mass as m1 grams, accurate to 0.0001 grams.

[0103] Step 3: Repeat step 1, and weigh the crucible after the second cleaning, recording the mass as m2, accurate to 0.0001 grams.

[0104] Calculate the difference between m1 and m2. In this embodiment: m1-m2 = 75.6789-75.6765 = 0.0024 grams, that is, the difference between m1 and m2 is > 0.001 grams, so washing needs to continue.

[0105] Repeat step 1, and weigh the crucible after the third cleaning, recording the mass as m3, accurate to 0.0001 grams; calculate the difference between m2 and m3. In this embodiment: m2-m3=75.6765-75.6750=0.0015 grams, that is, the difference between m2 and m3 is still >0.001 grams, and it needs to be cleaned again;

[0106] Repeat step 1, and weigh the crucible after the fourth cleaning, denoted as m4, accurate to 0.0001 grams; calculate the difference between m3 and m4; in this embodiment: m3-m4=75.6750-75.6745=0.0005 grams, that is, the difference between m3 and m4 is <0.001 grams, stop cleaning.

[0107] Step 4: Control the crucible movement system and the rinsing and drying system. Rinse the crucible 14 three times with pure water, and blow it with cold air and hot air for 60-90 seconds each to obtain a clean crucible.

[0108] In this embodiment:

[0109] The electric rotating gripper 11 has a gripping force of 5 kg.

[0110] The suction force of the vacuum flipping suction cup 15 is 5 kg.

[0111] The programmable electric hair dryer 12 has a heating power of 500W.

[0112] The aquarium water pump 17 has a head of 1500mm and a flow rate of 200L / h.

[0113] Compared with the prior art, this specific implementation method has the following positive effects:

[0114] 1. This specific implementation method utilizes water jet grinding to remove the molten material remaining on the bottom and walls of the platinum crucible. No acid is required, so the absence of acidic emissions is beneficial for emission reduction. Operation in an environment where no acidic solutions are used is also beneficial for labor protection.

[0115] 2. In this specific embodiment, high-pressure water jets are used to grind away the residue while polishing the surface of the platinum crucible, ensuring a smooth surface that facilitates the flow and mixing of the molten material, thus improving melting efficiency.

[0116] 3. This specific embodiment evaluates the cleanliness of the platinum crucible by weighing the mass change after two consecutive cleaning and polishing processes. This avoids the impact of the previous cleaning cleanliness on the platinum crucible when it is reused, thus reducing contamination errors.

[0117] Therefore, this specific implementation method has the characteristics of no acidic emissions, environmental friendliness, benefiting labor protection, improving melting efficiency and reducing pollution error.

Claims

1. A method for cleaning a platinum crucible with a waterjet-polished surface, characterized in that, The platinum crucible cleaning method is as follows: For simplicity, the platinum crucible to be cleaned is referred to as the crucible; The crucible cleaning method employs a "water jet platinum crucible cleaning device". The dimensions of the crucible (14) are written into the main control program of the water jet platinum crucible cleaning device to obtain a three-dimensional view of the crucible. Based on the three-dimensional view of the crucible, the following operations are performed: Step 1: Use the vacuum flipping suction cup (15) to hold the outer bottom or inner bottom of the crucible (14) so ​​that the water jet nozzle (10) is aligned with any point on the inner or outer surface of the crucible. Settings: The distance between the water jet nozzle (10) and the crucible cleaning surface is 5~7mm; the linear velocity of the crucible (14) is 10~5mm / sec, the water pressure is 30~20MPa, the angle between the water jet direction and the inner and outer wall surfaces is 3~5°, and the angle between the water jet direction and the inner and outer bottom surfaces is -10~+10°. The inner wall, outer wall, inner bottom surface and outer bottom surface of the crucible (14) were cleaned with water jets respectively; First cleaning completed; Step 2: Control the crucible moving system and the rinsing and drying system, blow hot air and room temperature air for 60~90 seconds each, weigh the crucible (14) after the first cleaning, and record it as m1 grams; Step 3: Repeat step 1, and weigh the crucible after the second cleaning, and record the mass as m2; Calculate the difference between m1 and m2. Stop cleaning when the difference is less than 0.001 grams. When the difference is greater than 0.001 grams, repeat step 1 until the difference is less than 0.001 grams, then stop washing. Step 4: Control the crucible moving system and the rinsing and drying system, rinse the crucible (14) three times with pure water, and blow it with cold air and hot air for 60~90 seconds each to obtain a clean crucible.

2. The method for cleaning platinum crucibles with waterjet-polished surfaces according to claim 1, characterized in that, The water jet platinum crucible cleaning device consists of a programmable water jet system, a crucible moving system, and a rinsing and drying system. The structure of the programmable water jet system is as follows: the output shaft of the water jet motor (3) is connected to the input shaft of the high pressure pump (4), the water jet tank (1) is connected to the filter screen (2) and the water inlet of the high pressure pump (4) through a water pipe, the water outlet of the high pressure pump (4) is connected to the water inlet of the water jet nozzle (10), and the water jet nozzle (10) is fixed above the electric lifting column (5) by a fixing plate; The structure of the crucible moving system is as follows: the top of the electric lifting column (5) is fixedly connected to the bottom surface of the plate (6); the upper parts of the front and rear sides of the electric angular displacement stage (7) are respectively hinged to the bottom of the front and rear sides of the guide rail (8) through corresponding connecting rods; the electric slider (9) is slidably connected to the guide rail (8); the bottom of the electric rotating gripper (11) is fixedly connected to the upper surface of the electric slider (9); the electric lifting column (5) is directly driven by the lifting DC motor; the electric angular displacement stage (7) and the electric slider (9) are both directly driven by their respective DC motors; the maximum distance that the electric slider (9) moves to the right along the direction of the guide rail (8) is 80~110mm; the tilt angle of the guide rail (8) is 0~30°. The structure of the rinsing and drying system is as follows: the nozzle (13) of the programmable electric heating blower (12) is installed directly above the vacuum rotating suction cup (15), the distance between the nozzle (13) and the rotating shaft of the vacuum rotating suction cup (15) is 50~100mm, a pure water nozzle (16) is provided directly below the vacuum rotating suction cup (15), and the pure water nozzle (16) is connected to the pure water tank (18) through the aquarium water pump (17); the distance from the axis of the nozzle (13) to the upper surface of the vacuum rotating suction cup (15) is 50~100mm, and the distance from the mouth of the pure water nozzle (16) to the upper surface of the vacuum rotating suction cup (15) is 50~100mm.

3. The method for cleaning platinum crucibles with waterjet-polished surfaces according to claim 1, characterized in that, The crucible (14) is a sample platinum crucible for molten chemical analysis.

4. The method for cleaning platinum crucibles with waterjet-polished surfaces according to claim 1, characterized in that, The water pressure of the water jet nozzle (10) is 10~30Mpa.

5. The method for cleaning platinum crucibles with waterjet-polished surfaces according to claim 1, characterized in that, The suction force of the vacuum flipping suction cup (15) is 3~5kg.

6. The method for cleaning platinum crucibles with waterjet-polished surfaces according to claim 2, characterized in that, The electric rotating gripper (11) can rotate 360° infinitely, with programmable speed adjustment; gripping force is 1~5kg.

7. The method for cleaning platinum crucibles with waterjet-polished surfaces according to claim 2, characterized in that, The heating power of the programmable electric hair dryer (12) is 300~500w.

8. The method for cleaning platinum crucibles with waterjet-polished surfaces according to claim 2, characterized in that, The aquarium water pump (17) has a head of 300~1500mm and a flow rate of 60~200L / h.

9. The method for cleaning platinum crucibles with waterjet-polished surfaces according to claim 2, characterized in that, The angle range of the electric angular displacement stage (7) is ±15º.

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