Cleaning method and cleaning equipment for NACE TM0177A method test container

Abstract

The invention belongs to the technical field of test equipment, and particularly discloses a cleaning method and cleaning equipment for a test container adopting an NACE TM0177A method. According to the invention, the NACE TM0177A method test container can be cleaned without dismounting the NACE TM0177A method test container, the requirements of the NACE TM0177A method test standard are met, the used washing liquid can be repeatedly used, the washing liquid can be neutralized to be neutral and discharged after being used for many times, the environment is not polluted, and the discharge standard is reached.

Description

Technical Field

[0001] The invention belongs to the technical field of test equipment, and in particular relates to a cleaning method and a cleaning equipment for a NACE TM0177A method test container. Background Art

[0002] NACE TM0177A method, laboratory test of metal resistance to sulfide stress cracking and stress corrosion cracking in H2S environment, is mainly used to evaluate the metal's resistance to environmental cracking under uniaxial tensile loading.

[0003] like Figure 1 The structure of the NACE TM0177A test container shown in the figure mainly includes three parts: the bottom 100, the body 200, and the cover 300. A NACE TM0177A test container is tightened with three sets of screws 400 and nuts 500. The NACE TM0177A test cycle is 30 days. Each container only contains one sample. The test container must be cleaned after each test. Since there are many NACE TM0177A test containers, each NACE TM0177A test container must first remove three sets of screws 400 and nuts 500, and then clean the body 200, the cover 300, and the bottom 100 respectively. After cleaning, the container is tightened with three sets of screws 400 and nuts 500 for standby use. Not only is it time-consuming to disassemble and assemble the test container, but it is also difficult to clean it with clean water. In addition, strong acid is highly corrosive and is not suitable for this type of cleaning. Therefore, a cleaning method must be developed that can clean the NACE TM0177A test container without disassembling it. Summary of the invention

[0004] The purpose of the present invention is to overcome the above problems existing in the prior art and provide a cleaning method and cleaning equipment for a NACE TM0177A test container, which can clean the NACE TM0177A test container without disassembling it, thereby meeting the requirements of the NACE TM0177A test standard.

[0005] In order to achieve the above technical objectives and the above technical effects, the present invention is implemented through the following technical solutions:

[0006] In a first aspect, the present invention provides a method for cleaning a NACE TM0177A test container, the cleaning method comprising the following steps:

[0007] S1: preparing oxalic acid solution in a liquid preparation tank;

[0008] S2: After the test container is moved to the pickling tank and fixed, oxalic acid solution is introduced into the pickling tank so that the test container is completely immersed in the oxalic acid solution for 1-4 hours;

[0009] S3: After the soaking is completed, the used oxalic acid solution in the pickling tank is transported to the recovery tank for temporary storage to obtain the cleaning waste liquid, and the soaked test container is transferred to the ultrasonic cleaning tank for ultrasonic cleaning;

[0010] S4: After the ultrasonic cleaning is completed, the test container is transferred to a cleaning tank, and the test container in the cleaning tank is periodically rinsed using a spray mechanism. After the periodic cyclic flushing is completed, the test container is sprayed and cleaned using pure water. After the spray cleaning, the test container in the cleaning tank is taken out and dried to obtain a cleaned test container;

[0011] S5: Detect the oxalic acid concentration in the recovery tank, replenish it to the set oxalic acid solution concentration, and then transport it back to the pickling tank for use.

[0012] Furthermore, in step S1, the concentration of the oxalic acid solution is 5-10%.

[0013] Furthermore, in step S3, the ultrasonic cleaning time is 10-20 minutes.

[0014] Furthermore, in step S4, the cyclic flushing means first using the cleaning waste liquid in the recovery tank to spray and clean the test container for 5-10 minutes, and then using pure water to spray and clean the test container for 5-10 minutes to complete a flushing cycle, and a total of 3-6 flushing cycles are performed.

[0015] In a second aspect, the present invention provides a cleaning device using the NACE TM0177A test container cleaning method provided by the embodiment of the first aspect of the present invention, comprising a liquid preparation tank, a pickling tank, a recovery tank, an ultrasonic cleaning tank, a cleaning tank, a pure water delivery pipeline, and an acid delivery pipeline;

[0016] The pure water delivery pipeline is connected to a plurality of branch pipelines 1, and the plurality of branch pipelines 1 are respectively connected to a liquid preparation tank, a pickling tank, a recovery tank, an ultrasonic cleaning tank and a cleaning tank;

[0017] The acid liquid delivery pipeline is connected to a plurality of branch pipelines 2, and the plurality of branch pipelines 2 are respectively connected to the liquid preparation tank, the pickling tank and the recovery tank;

[0018] The outlet end of the liquid preparation tank is connected to the pickling tank through a pipeline, the outlet end of the pickling tank is connected to the recovery tank through a pipeline, the outlet end of the recovery tank is connected to the pickling tank and the cleaning tank through pipelines respectively, and the outlet end of the cleaning tank is connected to the recovery tank through a pipeline;

[0019] A bearing plate 1 is arranged at the lower end of the pickling tank, and a driving mechanism and a clamping plate are arranged below the top cover of the pickling tank, wherein the driving mechanism is used to drive the clamping plate to move up and down along the axis of the pickling tank;

[0020] A spray assembly is provided at the upper end of the cleaning tank.

[0021] Furthermore, the spray assembly includes an annular spray plate and a lifting mechanism disposed on the top surface of the annular spray plate, the lifting mechanism is installed on the top cover of the cleaning tank, and the lifting mechanism is used to drive the annular spray plate to rise and fall;

[0022] The outer edge of the annular spray plate protrudes downward to form an outer annular flange, and the middle part of the annular spray plate protrudes downward to form an inner annular flange;

[0023] The lower bottom surface edge of the outer annular flange is evenly distributed with mounting seats 1 along the circumferential direction, and the mounting seats 1 are mounted with nozzles 1;

[0024] The lower bottom surface edge of the inner annular flange is evenly distributed with mounting seats 2 along the circumferential direction, and the second nozzle is installed on the mounting seat 2.

[0025] Furthermore, a second bearing plate is provided at the lower end of the interior of the cleaning tank, and a rotating driving member is provided at the bottom of the second bearing plate, and the rotating driving member is used to drive the second bearing plate to rotate.

[0026] Furthermore, water-permeable holes are evenly distributed on the first bearing plate and the clamping plate.

[0027] Furthermore, the lower bottom surface of the clamping plate is evenly distributed with limiting platforms along the circumferential direction;

[0028] Two brush plates are arranged along the circumferential direction on the edge of the lower bottom surface of the clamping plate.

[0029] Furthermore, a filter assembly is provided below the first carrier plate;

[0030] The filter assembly includes a plurality of filter plates, and there is a gap between two adjacent filter plates;

[0031] The inner diameters of the filter holes on the plurality of filter plates gradually decrease from top to bottom.

[0032] Compared with the prior art, the present invention has the following beneficial effects:

[0033] 1. The present invention provides a method for cleaning a NACE TM0177A test container. A 5-10% oxalic acid solution is prepared in an acid-resistant container preparation tank, and the NACE TM0177A test container is completely immersed in the 5-10% oxalic acid solution, and then ultrasonically cleaned. Finally, the test container is cleaned by periodic rinsing, pure water cleaning, and drying, thereby meeting the requirements of the NACE TM0177 standard and making the test result more accurate.

[0034] 2. In the present invention, the prepared oxalic acid solution can not only be used as a flushing liquid after use, but can also be reused after being supplemented to a set oxalic acid solution concentration. Finally, the oxalic acid solution that cannot be recycled can be neutralized with alkali to a neutral state for discharge, which will not cause pollution to the environment and thus meet the emission standards.

[0035] 3. In the present invention, after the prepared oxalic acid solution is cleaned, when it is transported to the recovery tank via the pickling tank, it will first be filtered through the filter component at the bottom of the pickling tank, and then transported to the recovery tank for recovery. The filter component can be used to filter the particulate matter in the used oxalic acid solution to prevent the cleaning waste liquid in the recovery tank from bringing particulate matter into the surface of the test container during the periodic circulation flushing of the test container, thereby affecting the circulation flushing effect.

[0036] 4. In the present invention, the cleaning of the test container is carried out according to the steps of acid washing - ultrasonic cleaning - cyclical flushing of cleaning waste liquid and pure water and pure water cleaning, so as to ensure that there is no residual stain on the surface of the test container after acid washing and ultrasonic cleaning, thereby ensuring the cleaning effect.

[0037] 5. In the present invention, the test container can be cleaned without disassembling it, which saves time and effort.

[0038] 6. In the present invention, the process of cyclical flushing of the cleaning waste liquid and pure water is carried out in a cleaning tank, and a spray assembly is arranged in the cleaning tank, wherein the spray assembly includes an annular spray plate, and an inner annular flange and an outer annular flange are arranged at the bottom of the annular spray plate, and nozzles are connected to the inner annular flange and the outer annular flange through a mounting seat, wherein the cleaning waste liquid and pure water can enter the cleaning tank separately / simultaneously through the nozzles on the inner annular flange and the nozzles on the outer annular flange to spray and clean the test container in the cleaning tank; nozzles are arranged in an annular array to ensure sufficient spraying of the test container, and when the cleaning waste liquid is used for flushing, the test container is ensured to be in an acidic atmosphere, so that the residue on its surface is easier to remove; cyclical flushing of the cleaning waste liquid and pure water is arranged, and after the test container is cleaned with the cleaning waste liquid, its surface can be cleaned with pure water, and this cyclical flushing method can make the cleaning of the test container more thorough and ensure its cleaning effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0040] Figure 1 It is a schematic diagram of the structure of the NACE TM0177A method test container provided in the background technology of the present invention;

[0041] Figure 2 It is a structural schematic diagram of the cleaning device provided by the present invention;

[0042] Figure 3 It is a structural cross-sectional view of the pickling tank provided by the present invention;

[0043] Figure 4 It is a structural cross-sectional view of the cleaning tank provided by the present invention;

[0044] Figure 5 It is a schematic diagram of the installation structure of a nozzle 1 and a mounting base 1 provided by the present invention.

[0045] Among them, the accompanying drawings are marked as: 1. liquid preparation tank; 2. pickling tank; 3. recovery tank; 4. ultrasonic cleaning tank; 5. cleaning tank; 6. pure water delivery pipeline; 7. acid delivery pipeline; 21. load-bearing plate one; 22. driving mechanism; 23. clamping plate; 24. limit table; 25. brush plate; 26. filter assembly; 261. filter plate; 8. spray assembly; 81. annular spray plate; 82. lifting mechanism; 83. external annular flange; 84. internal annular flange; 831. mounting seat one; 832. nozzle one; 833. installation notch; 834. locking bolt; 841. mounting seat two; 842. nozzle two; 9. load-bearing plate two; 10. rotating drive member. DETAILED DESCRIPTION

[0046] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0047] In the description of the present invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inside", "all around" and the like indicating orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0048] In a first aspect, a method for cleaning a NACE TM0177A test container comprises the following steps:

[0049] S1: preparing an oxalic acid solution with a concentration of 5-10% in a liquid preparation tank 1;

[0050] S2: After the test container is moved to the pickling tank 2 and fixed, oxalic acid solution is introduced into the pickling tank 2 to completely immerse the test container in the oxalic acid solution for 1-4 hours;

[0051] S3: After the soaking is completed, the used oxalic acid solution in the pickling tank 2 is transported to the recovery tank 3 for temporary storage to obtain the cleaning waste liquid, and the soaked test container is transferred to the ultrasonic cleaning tank 4 for ultrasonic cleaning, wherein the ultrasonic cleaning time is 10-20 minutes;

[0052] S4: After the ultrasonic cleaning is completed, the test container is transferred to the cleaning tank 5, and the test container in the cleaning tank 5 is periodically rinsed using a spray mechanism. After the periodic cyclic flushing is completed, the test container is sprayed and cleaned using pure water. After the spray cleaning, the test container in the cleaning tank 5 is taken out and dried to obtain a cleaned test container;

[0053] In step S4, the cycle flushing means first using the cleaning waste liquid in the recovery tank 3 to spray and clean the test container for 5-10 minutes, and then using pure water to spray and clean the test container for 5-10 minutes to complete a flushing cycle, and a total of 3-6 flushing cycles are performed;

[0054] S5: Detect the oxalic acid concentration in the recovery tank 3, replenish it to the set oxalic acid solution concentration (ie, the initial concentration of the oxalic acid solution is 5-10%), and then transport it back to the pickling tank 2 for use.

[0055] Second, as Figures 2 to 4 As shown, the present invention provides a cleaning device for a NACE TM0177A method test container cleaning method, the cleaning device is used to perform the NACE TM0177A method test container cleaning method provided by the embodiment of the first aspect of the present invention, the cleaning device comprises a liquid preparation tank 1, a pickling tank 2, a recovery tank 3, an ultrasonic cleaning tank 4, a cleaning tank 5, a pure water delivery pipeline 6 and an acid delivery pipeline 7;

[0056] The pure water delivery pipeline 6 is connected with a plurality of branch pipelines 1, and the plurality of branch pipelines 1 are respectively connected to the liquid preparation tank 1, the pickling tank 2, the recovery tank 3, the ultrasonic cleaning tank 4 and the cleaning tank 5; specifically, the plurality of branch pipelines 1 are all provided with valves;

[0057] The acid delivery pipeline 7 is connected with a plurality of branch pipelines 2, and the plurality of branch pipelines 2 are respectively connected to the liquid preparation tank 1, the pickling tank 2 and the recovery tank 3; specifically, the plurality of branch pipelines 2 are all provided with valves;

[0058] The outlet end of the liquid preparation tank 1 is connected to the pickling tank 2 through a pipeline, the outlet end of the pickling tank 2 is connected to the recovery tank 3 through a pipeline, the outlet end of the recovery tank 3 is connected to the pickling tank 2 and the cleaning tank 5 through pipelines respectively, and the outlet end of the cleaning tank 5 is connected to the recovery tank 3 through a pipeline;

[0059] Among them, valves are provided on the pipeline between the outlet end of the pickling tank 2 and the recovery tank 3, on the pipeline between the outlet end of the recovery tank 3 and the cleaning tank 5, and on the pipeline between the outlet end of the cleaning tank 5 and the recovery tank 3;

[0060] A filter is also provided at the outlet end of the cleaning tank 5 for filtering the washing liquid flowing out of the cleaning tank 5 to the recovery tank 3 .

[0061] like Figures 2 to 3 As shown, in one embodiment of the present invention, a bearing plate 21 is provided at the lower end of the interior of the pickling tank 2, a driving mechanism 22 and a clamping plate 23 are provided below the top cover of the pickling tank 2, the bearing plate 21 is used to carry the test container, and the clamping plate 23 that can move up and down can be used to clamp and fix the test container;

[0062] The driving mechanism 22 is used to drive the clamping plate 23 to move up and down along the axis of the pickling tank 2; specifically, the driving mechanism 22 can be a cylinder or a hydraulic rod, whichever can realize the up and down movement of the clamping plate 23;

[0063] The bearing plate 21 and the clamping plate 23 are evenly distributed with water-permeable holes;

[0064] In addition, the limiting platforms 24 are evenly distributed along the circumferential direction on the lower bottom surface of the clamping plate 23; the limiting platforms 24 are used to limit the test container, wherein a plurality of test containers can be placed on the carrying plate 1 21 to complete the batch pickling of the test containers;

[0065] A filter assembly 26 is provided below the carrier plate 1 21; the filter assembly 26 includes a plurality of filter plates 261, and a gap exists between two adjacent filter plates 261; the inner diameters of the filter holes on the plurality of filter plates 261 gradually decrease from top to bottom;

[0066] The filter assembly 26 is used to filter the used oxalic acid solution and is provided with a plurality of filter plates 261. There is a gap between two adjacent filter plates 261, and the inner diameter of the filter holes on the plurality of filter plates 261 gradually decreases from top to bottom, thereby ensuring the effect of stacked filtration.

[0067] like Figures 2 to 3 As shown, in one embodiment of the present invention, a rotating member is provided at the mounting end of the driving mechanism 22, and the rotating member is used to rotate the driving mechanism 22, thereby rotating the clamping plate 23; specifically, the rotating member can be a motor, so as to realize the rotation of the driving mechanism 22;

[0068] Two brush plates 25 are provided along the circumferential direction at the edge of the lower bottom surface of the clamping plate 23 for stirring the liquid inside the pickling tank 2 and for cleaning the inside of the pickling tank 2 .

[0069] like Figures 2 to 5As shown, in one embodiment of the present invention, a spray assembly 8 is provided at the upper end of the interior of the cleaning tank 5; the spray assembly 8 includes an annular spray plate 81 and a lifting mechanism 82 provided on the top surface of the annular spray plate 81, the lifting mechanism 82 is installed on the top cover of the cleaning tank 5, and the lifting mechanism 82 is used to drive the annular spray plate 81 to rise and fall;

[0070] A second carrier plate 9 is provided at the lower end of the cleaning tank 5 for placing a plurality of test containers, wherein the plurality of test containers can be placed on the top of the second carrier plate 9 in a circular array; specifically, a plurality of limit members can be provided on the top of the second carrier plate 9 for limiting the positions of the plurality of test containers;

[0071] A rotary drive member 10 is provided at the bottom of the second carrier plate 9, and the rotary drive member 10 is used to drive the second carrier plate 9 to rotate;

[0072] The outer edge of the annular spray plate 81 protrudes downward to form an outer annular flange 83, and the middle portion of the annular spray plate 81 protrudes downward to form an inner annular flange 84;

[0073] The lower bottom edge of the outer annular flange 83 is evenly distributed with mounting seats 831 along the circumferential direction, and a nozzle 832 is installed on the mounting seat 831; the lower bottom edge of the inner annular flange 84 is evenly distributed with mounting seats 841 along the circumferential direction, and a nozzle 842 is installed on the mounting seat 841; specifically, the nozzle 832 and the nozzle 842 are rotatably installed on the mounting seat 831 and the mounting seat 841, respectively, that is, the spraying angles of the nozzle 832 and the nozzle 842 can be adjusted;

[0074] like Figure 5 As shown, the angle adjustment of the nozzle 1 832 and the nozzle 2 842 can be adjusted. Specifically, a mounting notch 833 is provided on the mounting seat 1 831 and the mounting seat 2 841. Taking the nozzle 1 832 as an example, the connection end of the nozzle 1 832 is rotatably arranged in the mounting notch 833. After the angle adjustment of the nozzle 1 832 is completed, the connection end of the nozzle 1 832 is fixed by two locking bolts 834. The angle adjustment method of the nozzle 2 842 is carried out with reference to the nozzle 1 832.

[0075] The cleaning waste liquid and pure water can enter the cleaning tank 5 separately / simultaneously through the nozzle 2 842 on the inner annular flange 84 and the nozzle 1 832 on the outer annular flange 83 .

[0076] like Figures 2 to 4 As shown, in one embodiment of the present invention, an annular area 85 is formed between the outer annular flange 83 and the inner annular flange 84, wherein the test container faces the annular area 85;

[0077] Among them, since multiple test containers can be placed on the top of the second carrier plate 9 in a circular array, when the multiple test containers are rinsed with the cleaning waste liquid, the multiple cleaning waste liquids are connected to the nozzle 1 832 and the nozzle 2 842 through the pipeline to rinse the test containers facing the annular area 85;

[0078] This annular array of nozzles ensures that the test container is fully sprayed, and when the cleaning waste liquid is used for flushing, the test container is ensured to be in an acidic atmosphere, so that the residue on the surface is easier to remove.

[0079] The following are specific examples.

[0080] Example 1

[0081] This embodiment provides a method for cleaning a NACE TM0177A test container, the cleaning method comprising the following steps:

[0082] S1: preparing a 5% oxalic acid solution in a liquid preparation tank 1;

[0083] S2: After the test container is moved to the pickling tank 2 and fixed, oxalic acid solution is introduced into the pickling tank 2 to make the test container completely immersed in the oxalic acid solution for 4 hours;

[0084] S3: After the soaking is completed, the oxalic acid solution in the pickling tank 2 is transported to the recovery tank 3 for temporary storage to obtain the cleaning waste liquid, and the soaked test container is transferred to the ultrasonic cleaning tank 4 for ultrasonic cleaning, wherein the ultrasonic cleaning time is 20 minutes;

[0085] S4: After the ultrasonic cleaning is completed, the test container is transferred to the cleaning tank 5, and the test container in the cleaning tank 5 is periodically rinsed using a spray mechanism. After the periodic cyclic flushing is completed, the test container is sprayed and cleaned using pure water. After the spray cleaning, the test container in the cleaning tank 5 is taken out and dried to obtain a cleaned test container;

[0086] In step S4, the cycle flushing means first using the cleaning waste liquid to spray and clean the test container for 10 minutes, and then using pure water to spray and clean the test container for 5 minutes to complete one flushing cycle, and a total of 6 flushing cycles are performed;

[0087] S5: Detect the oxalic acid concentration in the recovery tank 3, replenish it to the set oxalic acid solution concentration (ie, the initial concentration of the oxalic acid solution is 5%), and then transport it back to the pickling tank 2 for use.

[0088] Example 2

[0089] This embodiment provides a method for cleaning a NACE TM0177A test container, the cleaning method comprising the following steps:

[0090] S1: preparing an oxalic acid solution with a concentration of 7.5% in a liquid preparation tank 1;

[0091] S2: After the test container is moved to the pickling tank 2 and fixed, oxalic acid solution is introduced into the pickling tank 2 to make the test container completely immersed in the oxalic acid solution for 2 hours;

[0092] S3: After the soaking is completed, the oxalic acid solution in the pickling tank 2 is transported to the recovery tank 3 for temporary storage to obtain the cleaning waste liquid, and the soaked test container is transferred to the ultrasonic cleaning tank 4 for ultrasonic cleaning, wherein the ultrasonic cleaning time is 15 minutes;

[0093] S4: After the ultrasonic cleaning is completed, the test container is transferred to the cleaning tank 5, and the test container in the cleaning tank 5 is periodically rinsed using a spray mechanism. After the periodic cyclic flushing is completed, the test container is sprayed and cleaned using pure water. After the spray cleaning, the test container in the cleaning tank 5 is taken out and dried to obtain a cleaned test container;

[0094] In step S4, the cycle flushing means first using the cleaning waste liquid to spray the test container for 7.5 minutes, and then using pure water to spray the test container for 7.5 minutes to complete one flushing cycle, and a total of 5 flushing cycles are performed;

[0095] S5: Detect the oxalic acid concentration in the recovery tank 3, replenish it to the set oxalic acid solution concentration (ie, the initial concentration of the oxalic acid solution is 7.5%), and then transport it back to the pickling tank 2 for use.

[0096] Example 3

[0097] This embodiment provides a method for cleaning a NACE TM0177A test container, the cleaning method comprising the following steps:

[0098] S1: preparing a 10% oxalic acid solution in a liquid preparation tank 1;

[0099] S2: After the test container is moved to the pickling tank 2 and fixed, oxalic acid solution is introduced into the pickling tank 2 so that the test container is completely immersed in the oxalic acid solution for 1 hour;

[0100] S3: After the soaking is completed, the oxalic acid solution in the pickling tank 2 is transported to the recovery tank 3 for temporary storage to obtain the cleaning waste liquid, and the soaked test container is transferred to the ultrasonic cleaning tank 4 for ultrasonic cleaning, wherein the ultrasonic cleaning time is 10 minutes;

[0101] S4: After the ultrasonic cleaning is completed, the test container is transferred to the cleaning tank 5, and the test container in the cleaning tank 5 is periodically rinsed using a spray mechanism. After the periodic cyclic flushing is completed, the test container is sprayed and cleaned using pure water. After the spray cleaning, the test container in the cleaning tank 5 is taken out and dried to obtain a cleaned test container;

[0102] In step S4, the cycle flushing means first using the cleaning waste liquid to spray and clean the test container for 5 minutes, and then using pure water to spray and clean the test container for 10 minutes to complete a flushing cycle, and a total of 3 flushing cycles are performed;

[0103] S5: Detect the oxalic acid concentration in the recovery tank 3, replenish it to the set oxalic acid solution concentration (ie, the initial concentration of the oxalic acid solution is 10%), and then transport it back to the pickling tank 2 for use.

[0104] Experimental example

[0105] The cleaning effects of the cleaned test containers provided in Examples 1-3 were observed. The observation results showed that the cleaned test containers provided in Examples 1-3 were transparent, clean on the surface, and free of residue, meeting the requirements of the NACE TM0177 standard.

[0106] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0107] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. A method for cleaning a NACE TM0177A test container, characterized in that: The cleaning method comprises the following steps: S1: preparing an oxalic acid solution in a liquid preparation tank (1); S2: After the test container is moved to the pickling tank (2) and fixed, oxalic acid solution is introduced into the pickling tank (2) so that the test container is completely immersed in the oxalic acid solution for 1-4 hours; S3: After the soaking is completed, the used oxalic acid solution in the pickling tank (2) is transported to the recovery tank (3) for temporary storage to obtain the cleaning waste liquid, and the soaked test container is transferred to the ultrasonic cleaning tank (4) for ultrasonic cleaning; S4: After the ultrasonic cleaning is completed, the test container is transferred to the cleaning tank (5), and the test container in the cleaning tank (5) is periodically rinsed using a spray mechanism. After the periodic cyclic flushing is completed, the test container is sprayed and cleaned using pure water. After the spray cleaning, the test container in the cleaning tank (5) is taken out and dried to obtain a cleaned test container; S5: Detect the oxalic acid concentration in the recovery tank (3), replenish it to the set oxalic acid solution concentration, and then transport it back to the pickling tank (2) for use.

2. The method for cleaning a NACE TM0177A test container according to claim 1, characterized in that: In step S1, the concentration of the oxalic acid solution is 5-10%.

3. The method for cleaning a NACE TM0177A test container according to claim 1, characterized in that: In step S3, the ultrasonic cleaning time is 10-20 minutes.

4. The method for cleaning a NACE TM0177A test container according to claim 1, characterized in that: In step S4, the cyclic flushing means first using the cleaning waste liquid in the recovery tank (3) to spray and clean the test container for 5-10 minutes, and then using pure water to spray and clean the test container for 5-10 minutes to complete a flushing cycle, and a total of 3-6 flushing cycles are performed.

5. A cleaning device using the NACE TM0177A test container cleaning method according to any one of claims 1 to 4, characterized in that: It comprises a liquid preparation tank (1), a pickling tank (2), a recovery tank (3), an ultrasonic cleaning tank (4), a cleaning tank (5), a pure water delivery pipeline (6) and an acid delivery pipeline (7); The pure water delivery pipeline (6) is connected to a plurality of branch pipelines 1, and the plurality of branch pipelines 1 are respectively connected to the liquid preparation tank (1), the pickling tank (2), the recovery tank (3), the ultrasonic cleaning tank (4) and the cleaning tank (5); The acid liquid delivery pipeline (7) is connected to a plurality of branch pipelines 2, and the plurality of branch pipelines 2 are respectively connected to the liquid preparation tank (1), the pickling tank (2) and the recovery tank (3); The outlet end of the liquid preparation tank (1) is connected to the pickling tank (2) through a pipeline, the outlet end of the pickling tank (2) is connected to the recovery tank (3) through a pipeline, the outlet end of the recovery tank (3) is connected to the pickling tank (2) and the cleaning tank (5) through pipelines respectively, and the outlet end of the cleaning tank (5) is connected to the recovery tank (3) through a pipeline; A bearing plate (21) is provided at the lower end of the interior of the pickling tank (2), and a driving mechanism (22) and a clamping plate (23) are provided below the top cover of the pickling tank (2), wherein the driving mechanism (22) is used to drive the clamping plate (23) to move up and down along the axis of the pickling tank (2); A spray assembly (8) is provided at the upper end of the cleaning tank (5).

6. The cleaning device of the NACE TM0177A test container cleaning method according to claim 5, characterized in that: The spray assembly (8) comprises an annular spray plate (81) and a lifting mechanism (82) arranged on the top surface of the annular spray plate (81), wherein the lifting mechanism (82) is installed on the top cover of the cleaning tank (5), and the lifting mechanism (82) is used to drive the annular spray plate (81) to rise and fall; The outer edge of the annular spray plate (81) protrudes downward to form an outer annular flange (83), and the middle portion of the annular spray plate (81) protrudes downward to form an inner annular flange (84); The lower bottom surface edge of the outer annular flange (83) is evenly distributed with mounting seats (831) along the circumferential direction, and a nozzle (832) is mounted on the mounting seat (831); The lower bottom edge of the inner annular flange (84) is evenly distributed with mounting seats (841) along the circumferential direction, and nozzles (842) are installed on the mounting seats (841).

7. The cleaning device of the NACE TM0177A test container cleaning method according to claim 5, characterized in that: A second carrying plate (9) is provided at the lower end of the cleaning tank (5), and a rotating driving member (10) is provided at the bottom of the second carrying plate (9). The rotating driving member (10) is used to drive the second carrying plate (9) to rotate.

8. The cleaning device of the NACE TM0177A test container cleaning method according to claim 5, characterized in that: The first bearing plate (21) and the clamping plate (23) are evenly distributed with water-permeable holes.

9. The cleaning device of the NACE TM0177A test container cleaning method according to claim 5, characterized in that: The lower bottom surface of the clamping plate (23) is evenly distributed with limiting platforms (24) along the circumferential direction; Two brush plates (25) are provided along the circumferential direction on the edge of the lower bottom surface of the clamping plate (23).

10. The cleaning device of the NACE TM0177A test container cleaning method according to claim 5, characterized in that: A filter assembly (26) is provided below the first carrier plate (21); The filter assembly (26) comprises a plurality of filter plates (261), and a gap exists between two adjacent filter plates (261); The inner diameters of the filter holes on the plurality of filter plates (261) gradually decrease from top to bottom.

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