Spraying structure for net rack stress corrosion test and use method

Abstract

The invention discloses a spraying structure for a net rack stress corrosion test and a using method, the spraying structure comprises a closed shell, the closed shell comprises two transparent shells which are symmetrically arranged up and down, through grooves are formed in the transparent shells, and a fixing piece is arranged between the two transparent shells; the spraying system comprises a spraying pipeline and a liquid supply assembly, a plurality of spray heads are mounted on the spraying pipeline, the spray heads are arranged corresponding to the test pieces, and the liquid supply assembly is communicated with the spraying pipeline through a conveying pipe; the liquid collecting assembly comprises a collecting tank and a filtering assembly, a liquid discharging assembly is installed at the bottom of the transparent shell located on the lower portion, the collecting tank is communicated with the filtering assembly, and the filtering assembly is communicated with the liquid supply assembly; the acid-base balance system is connected to the liquid supply assembly in parallel; and a pH value detection system is mounted on the conveying pipe. Through the arrangement of the liquid collecting assembly, waste liquid can be recycled, filtered and refluxed, and the experiment loss is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of material property detection, and in particular to a spray structure for a grid stress corrosion test and a use method thereof. Background Art

[0002] The detection of material properties usually includes physical properties and chemical properties. Physical properties are the strength, stiffness and toughness of the material. Common tests of chemical properties include corrosion resistance. In the prior art, a loading device is usually used to stress load the material, and a corrosive solution is set to detect the corrosion resistance of the material under load. The corrosive solution is usually sprayed directly or the material is directly placed in a solution tank. The direct spraying method will cause a great deal of waste of solution, and the solution tank needs to be filled with a large amount of solution. Based on this, the present invention provides a spray structure for a grid stress corrosion test and a method of use. Summary of the invention

[0003] The purpose of the present invention is to provide a spray structure for grid stress corrosion test and a method of use, so as to solve the problems existing in the prior art.

[0004] To achieve the above object, the present invention provides the following solution: The present invention provides a spray structure for a grid stress corrosion test, comprising:

[0005] A closed housing, the closed housing comprising two transparent housings symmetrically arranged up and down, the transparent housings are provided with through slots, the through slots are arranged corresponding to the test piece, and a fixing piece is arranged between the two transparent housings;

[0006] A spray system, the spray system comprising a spray pipe and a liquid supply assembly, the spray pipe being annular and arranged in the two transparent shells, a plurality of spray heads being installed on the spray pipe, the spray heads being arranged corresponding to the test pieces, and the liquid supply assembly being connected to the spray pipe through a delivery pipe;

[0007] A liquid collecting assembly, the liquid collecting assembly includes a collecting tank and a filtering assembly, a liquid discharge assembly is installed at the bottom of the transparent shell located below, the liquid discharge assembly is arranged correspondingly with the collecting tank, the collecting tank is communicated with the filtering assembly, and the filtering assembly is communicated with the liquid supply assembly;

[0008] An acid-base balance system, wherein the acid-base balance system is connected in parallel to the liquid supply assembly;

[0009] Wherein, a pH value detection system is installed on the delivery pipe.

[0010] According to the spray structure for the grid stress corrosion test provided by the present invention, the liquid supply assembly comprises a base frame, a liquid storage tank is fixedly connected to the base frame, a top cover is detachably connected to the top of the liquid storage tank, the liquid storage tank is fixedly connected to the spray pipe through the delivery pipe, and a stirring assembly is installed in the liquid storage tank;

[0011] The stirring assembly comprises a driving motor fixedly connected to the top end of the top cover, a stirring shaft is rotatably connected in the liquid storage tank, the top end of the stirring shaft is axially connected to the driving motor, and a plurality of stirring rods are fixedly connected to the stirring shaft.

[0012] According to the spray structure for grid stress corrosion test provided by the present invention, the filter assembly includes a filter box, a storage tank is installed in the filter box, the storage tank is fixedly connected to the collection tank through a collecting pipe, a first filter assembly and a second filter assembly are installed in the filter box, the first filter assembly and the second filter assembly are connected to two ports of a first electromagnetic three-way valve, the first filter assembly is connected to the storage tank, and the other port of the first electromagnetic three-way valve and the output end of the second filter assembly are connected to the liquid storage tank through connecting pipes.

[0013] According to the spray structure for grid stress corrosion test provided by the present invention, the first filter assembly includes an activated carbon filter, the input end of the activated carbon filter is connected to the storage tank, and the output end of the activated carbon filter is connected to one of the ports of the first electromagnetic three-way valve.

[0014] According to the spray structure for grid stress corrosion test provided by the present invention, the second filter component includes a reverse osmosis membrane filter, the input end of the reverse osmosis membrane filter is connected to one of the ports of the first electromagnetic three-way valve, and the output end of the reverse osmosis membrane filter is fixedly connected to the liquid storage tank.

[0015] According to the spray structure for grid stress corrosion test provided by the present invention, the acid-base balance system includes a second electromagnetic three-way joint and two liquid storage tanks, the two liquid storage tanks are connected to the two ports of the second electromagnetic three-way joint through connecting pipes, and the other outer port of the second electromagnetic three-way joint is fixedly connected to the liquid storage tank through a pressure pipe.

[0016] According to the spray structure for grid stress corrosion test provided by the present invention, the pH value detection system includes a third electromagnetic three-way valve installed on the delivery pipe, one port of the third electromagnetic three-way valve is fixedly connected to a reflux pipe, the reflux pipe is fixedly connected to the liquid storage tank, and a pH value detection sensor is arranged between the third electromagnetic three-way valve and the liquid storage tank.

[0017] According to the spray structure for grid stress corrosion test provided by the present invention, the drainage component includes a drainage funnel, a mounting hole is opened at the bottom of the transparent shell, the drainage funnel is fixedly connected in the mounting hole, and a drainage pipe is fixedly connected to the bottom of the drainage funnel, and the drainage pipe is correspondingly arranged between the collection tank.

[0018] A working method of a spray structure for a grid stress corrosion test comprises the following steps:

[0019] Step 1: determine the corrosion position and the number of devices to be set, set the spray pipe on the specimen, install two transparent shells on the specimen, and ensure that the spray pipe is set in the transparent shell, fix the transparent box with a fixing piece, and connect the spray pipe with the liquid supply assembly with a delivery pipe;

[0020] Step 2, acid-base balance system, the liquid supply component delivers corrosive liquid to the spray pipe through the delivery pipe, the pH value detection system detects the pH value of the corrosive liquid, if the pH value is different from the preset value, the solution flows back to the liquid supply component, and the acid-base balance system injects acidic solution or alkaline solution to adjust the pH value;

[0021] Step 3: The spray pipe uses several groups of ring-shaped nozzles to spray corrosive solutions on different positions of the test piece to perform corrosion resistance testing;

[0022] Step 4: Part of the acidic solution and the material shed from the specimen are collected by the drainage component and enter the filter component. The filtered corrosive solution flows back into the liquid supply component and is modulated by the acid-base balance system and then re-sprayed into the pipeline.

[0023] The present invention discloses the following technical effects:

[0024] The present invention adopts a transparent shell to seal the experimental area to avoid environmental impact caused by solution splashing. The annular spray pipe can enable the solution to be sprayed on different positions of the test piece, thereby improving the flexibility of the experiment. The liquid circulation group is connected to the spray pipe to ensure stable liquid supply. The liquid collection component can be set to recycle and filter the waste liquid and reflow it to reduce experimental loss. The acid-base balance system and the pH value detection system can be set to prepare the output solution, ensure that the pH value of the output solution is always kept within a specific range, and reduce experimental errors. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 It is a structural schematic diagram of the spray structure for the grid stress corrosion test of the present invention;

[0027] Figure 2 It is a schematic diagram of the structure of the filter assembly of the present invention;

[0028] Figure 3 It is a schematic structural diagram of the liquid supply assembly of the present invention.

[0029] Among them, 1. transparent shell; 2. spray pipe; 3. delivery pipe; 4. collection tank; 5. base frame; 6. liquid storage tank; 7. top cover; 8. drive motor; 9. stirring shaft; 10. stirring rod; 11. filter box; 12. storage tank; 13. first electromagnetic three-way valve; 14. activated carbon filter; 15. reverse osmosis membrane filter; 16. second electromagnetic three-way connector; 17. liquid storage tank; 18. pressure pipe; 19. third electromagnetic three-way valve; 20. reflux pipe; 21. pH value detection sensor; 22. drainage funnel; 23. drainage pipe. DETAILED DESCRIPTION

[0030] 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.

[0031] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0032] Reference Figure 1-Figure 3 The present invention provides a spray structure for a grid stress corrosion test, comprising:

[0033] The closed shell includes two transparent shells 1 symmetrically arranged in an upper and lower direction, a through slot is provided on the transparent shell 1, the through slot is arranged corresponding to the test piece, and a fixing piece is arranged between the two transparent shells 1; the transparent shell 1 is made of an anti-corrosion material or an anti-corrosion coating is applied on the inner wall;

[0034] Spray system, the spray system includes a spray pipe 2 and a liquid supply assembly. The spray pipe 2 is annular and is arranged in two transparent shells 1. A plurality of spray heads are installed on the spray pipe 2. The spray heads are arranged corresponding to the test pieces. The liquid supply assembly is connected to the spray pipe 2 through a delivery pipe 3.

[0035] The liquid collecting assembly includes a collecting tank 4 and a filtering assembly. A drain assembly is installed at the bottom of the transparent housing 1 below. The drain assembly is arranged correspondingly with the collecting tank 4. The collecting tank 4 is connected with the filtering assembly, and the filtering assembly is connected with the liquid supply assembly.

[0036] An acid-base balance system, the acid-base balance system is connected in parallel to the liquid supply component;

[0037] Wherein, a pH value detection system is installed on the delivery pipe 3.

[0038] In this embodiment, the connecting pipes of the device parts all need to use water pumps to circulate the solution. At the same time, a camera is arranged on the overall experimental bracket to capture the image. PLC or other types of controllers are used as the terminal system to achieve comprehensive control without excessive manual intervention.

[0039] The present invention adopts a transparent shell 1 to seal the experimental area to avoid environmental impact caused by solution splashing. The annular spray pipe 2 is adopted to enable the solution to be sprayed on different positions of the test piece, thereby improving the flexibility of the experiment. The liquid circulation group is connected to the spray pipe 2 to ensure stable liquid supply. The liquid collection component is set to recycle and filter the waste liquid and reflow it to reduce experimental loss. The acid-base balance system and the pH value detection system are set to prepare the output solution to ensure that the pH value of the output solution is always kept within a specific range, thereby reducing experimental errors.

[0040] According to a further optimized solution, the liquid supply assembly includes a base frame 5, a liquid storage tank 6 is fixedly connected to the base frame 5, a top cover 7 is detachably connected to the top of the liquid storage tank 6, the liquid storage tank 6 is fixedly connected to the spray pipe 2 through the delivery pipe 3, and a stirring assembly is installed in the liquid storage tank 6;

[0041] The stirring assembly includes a driving motor 8 fixedly connected to the top of the top cover 7, a stirring shaft 9 is rotatably connected in the liquid storage tank 6, the top of the stirring shaft 9 is axially connected to the driving motor 8, and a plurality of stirring rods 10 are fixedly connected to the stirring shaft 9.

[0042] In this embodiment, the stirring shaft 9 is driven to rotate by the driving motor 8, and the rotation of the stirring shaft 9 drives the stirring rod 10 to rotate, thereby assisting the mixing of the solutions and improving the experimental efficiency.

[0043] A further optimized solution is provided, in which the filter assembly includes a filter box 11, in which a storage tank 12 is installed, the storage tank 12 is fixedly connected to the collecting tank 4 through a collecting pipe, a first filter assembly and a second filter assembly are installed in the filter box 11, the first filter assembly and the second filter assembly are connected to two ports of a first electromagnetic three-way valve 13, the first filter assembly is connected to the storage tank 12, and the other port of the first electromagnetic three-way valve 13 and the output end of the second filter assembly are connected to the liquid storage tank 6 through connecting pipes, respectively.

[0044] According to a further optimization scheme, the first filter component includes an activated carbon filter 14 , the input end of the activated carbon filter 14 is connected to the storage tank 12 , and the output end of the activated carbon filter 14 is connected to one of the ports of the first electromagnetic three-way valve 13 .

[0045] According to a further optimized solution, the second filter assembly includes a reverse osmosis membrane filter 15 , the input end of the reverse osmosis membrane filter 15 is connected to one of the ports of the first electromagnetic three-way valve 13 , and the output end of the reverse osmosis membrane filter 15 is fixedly connected to the liquid storage tank 6 .

[0046] The activated carbon filter 14 is used for preliminary filtration. If the initially filtered corrosion solution can be directly used in subsequent experiments, it can enter the liquid storage tank 6. If the filtered solution cannot meet the use requirements, it needs to be filtered twice. The first electromagnetic three-way valve 13 controls the solution to be processed using two paths respectively to ensure the solution filtering effect.

[0047] In this embodiment, sensors for detecting particle concentration are respectively arranged in the pipelines to detect particles in the solution. The particle concentration detection sensors cooperate with the first electromagnetic three-way valve 13 to realize detection and filtration of particles in the solution.

[0048] According to a further optimization scheme, the acid-base balance system includes a second electromagnetic three-way joint 16 and two liquid storage tanks 17. The two liquid storage tanks 17 are connected to the two ports of the second electromagnetic three-way joint 16 through connecting pipes, and the other outer port of the second electromagnetic three-way joint 16 is fixedly connected to the liquid storage tank 6 through a pressure pipe 18.

[0049] According to a further optimization scheme, the pH value detection system includes a third electromagnetic three-way valve 19 installed on the delivery pipe 3, one port of the third electromagnetic three-way valve 19 is fixedly connected to a reflux pipe 20, the reflux pipe 20 is fixedly connected to the liquid storage tank 6, and a pH value detection sensor 21 is arranged between the third electromagnetic three-way valve 19 and the liquid storage tank 6.

[0050] In this embodiment, the solution refluxed by the secondary filtration enters the liquid storage tank 6, which will cause the pH value of the internal solution to change. Based on this, an acid-base balance system is used to modulate the pH value. A pH value detection sensor 21 is also provided in the liquid storage tank 6 to detect the internal pH value. At the same time, since the modulated solution is a mixed solution, there will be a problem that the solution added later cannot be evenly dispersed, that is, there is a difference between the pH value of the detection point and the pH value of the pipe mouth. In order to avoid this situation, a pH value detection sensor 21 is also provided on the delivery pipe 3. The pH value of the output solution is directly detected by the pH value sensor on the delivery pipe 3. If the pH value range of the output solution is not within the preset range, the second electromagnetic three-way valve controls the delivery pipe 3 to be disconnected, and the output solution re-enters the liquid storage tank 6 through the reflux pipe 20. At the same time, the stirring motor in the liquid storage tank 6 is turned on, and the stirring motor is used to assist the solution in diffusion and mixing. After that, it passes through the delivery pipe 3 again. If the pH value of the secondary delivered solution still cannot meet the actual needs, the acid-base balance system is used for secondary modulation, thereby ensuring that the pH value of the solution finally entering the spray pipe 2 remains within the preset range.

[0051] Such an arrangement can recycle the solution in a circulating manner, which improves the utilization rate of the solution, reduces the loss of the solution, and reduces the test cost. In addition, the pH value adjustment method can ensure that the difference between the pH value of the secondary injection solution after the recycled solution is mixed with the actual prepared solution and the pH value of the primary solution is within the allowable error range, thereby improving the accuracy and scientificity of the experiment.

[0052] Further optimized solution, the drainage assembly includes a drainage funnel 22, a mounting hole is opened at the bottom of the transparent shell 1, the drainage funnel 22 is fixedly connected in the mounting hole, and a drainage pipe 23 is fixedly connected to the bottom of the drainage funnel 22, and the drainage pipe 23 is correspondingly arranged with the collection tank 4.

[0053] A working method of a spray structure for a grid stress corrosion test comprises the following steps:

[0054] Step 1: determine the corrosion position and the number of devices to be set, set the spray pipe 2 on the specimen, install two transparent shells 1 on the specimen, and ensure that the spray pipe 2 is set in the transparent shell 1, fix the transparent box with a fixing piece, and connect the spray pipe 2 with the liquid supply component with a delivery pipe 3;

[0055] Step 2, acid-base balance system, the liquid supply component delivers the corrosive liquid to the spray pipe 2 through the delivery pipe 3, the pH value detection system detects the pH value of the corrosive liquid, if the pH value is different from the preset value, the solution flows back to the liquid supply component, and the acid-base balance system injects an acidic solution or an alkaline solution to modulate the pH value;

[0056] Step 3: The spray pipe 2 uses a plurality of groups of ring-shaped nozzles to spray corrosive solutions on different positions of the test piece to perform corrosion resistance testing;

[0057] Step 4: Part of the acidic solution and the material shed from the specimen are collected by the drainage component and enter the filtering component. The filtered corrosive solution flows back into the liquid supply component and is modulated by the acid-base balance system and then re-sprayed into the spray pipe 2.

[0058] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0059] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A spray structure for a grid stress corrosion test, characterized in that: include: A closed housing, the closed housing comprising two transparent housings (1) symmetrically arranged in an upper and lower direction, the transparent housings (1) being provided with through slots, the through slots being arranged corresponding to the test piece, and a fixing member being arranged between the two transparent housings (1); A spray system, the spray system comprising a spray pipe (2) and a liquid supply assembly, the spray pipe (2) being of an annular structure and being arranged in the two transparent shells (1), a plurality of spray heads being installed on the spray pipe (2), the spray heads being arranged corresponding to the test pieces, and the liquid supply assembly being connected to the spray pipe (2) via a delivery pipe (3); A liquid collection component, the liquid collection component comprising a collection tank (4) and a filter component, a liquid discharge component is installed at the bottom of the transparent shell (1) located below, the liquid discharge component and the collection tank (4) are arranged correspondingly, the collection tank (4) is connected to the filter component, and the filter component is connected to the liquid supply component; An acid-base balance system, wherein the acid-base balance system is connected in parallel to the liquid supply assembly; Wherein, a pH value detection system is installed on the delivery pipe (3).

2. A spray structure for grid stress corrosion testing according to claim 1, characterized in that: The liquid supply assembly comprises a base frame (5), a liquid storage tank (6) is fixedly connected to the base frame (5), a top cover (7) is detachably connected to the top of the liquid storage tank (6), the liquid storage tank (6) is fixedly connected to the spray pipe (2) through the delivery pipe (3), and a stirring assembly is installed in the liquid storage tank (6); The stirring assembly comprises a driving motor (8) fixedly connected to the top of the top cover (7); a stirring shaft (9) is rotatably connected in the liquid storage tank (6); the top of the stirring shaft (9) is axially connected to the driving motor (8); and a plurality of stirring rods (10) are fixedly connected to the stirring shaft (9).

3. A spray structure for grid stress corrosion testing according to claim 2, characterized in that: The filter assembly comprises a filter box (11), a storage tank (12) is installed in the filter box (11), the storage tank (12) and the collection tank (4) are fixedly connected via a collection pipe, a first filter assembly and a second filter assembly are installed in the filter box (11), the first filter assembly and the second filter assembly are connected to two ports of a first electromagnetic three-way valve (13), the first filter assembly is connected to the storage tank (12), and the other port of the first electromagnetic three-way valve (13) and the output end of the second filter assembly are connected to the liquid storage tank (6) via connecting pipes.

4. A spray structure for grid stress corrosion testing according to claim 3, characterized in that: The first filter assembly comprises an activated carbon filter (14), the input end of the activated carbon filter (14) is connected to the storage tank (12), and the output end of the activated carbon filter (14) is connected to one of the ports of the first electromagnetic three-way valve (13).

5. A spray structure for grid stress corrosion testing according to claim 4, characterized in that: The second filter assembly comprises a reverse osmosis membrane filter (15), the input end of the reverse osmosis membrane filter (15) is connected to one of the ports of the first electromagnetic three-way valve (13), and the output end of the reverse osmosis membrane filter (15) is fixedly connected to the liquid storage tank (6).

6. A spray structure for grid stress corrosion testing according to claim 2, characterized in that: The acid-base balance system comprises a second electromagnetic three-way joint (16) and two liquid storage tanks (17); the two liquid storage tanks (17) are respectively connected to two ports of the second electromagnetic three-way joint (16) through connecting pipes; the other outer port of the second electromagnetic three-way joint (16) is fixedly connected to the liquid storage tank (6) through a pressure pipe (18).

7. The spray structure for grid stress corrosion test according to claim 2, characterized in that: The pH value detection system comprises a third electromagnetic three-way valve (19) installed on the delivery pipe (3); one port of the third electromagnetic three-way valve (19) is fixedly connected to a reflux pipe (20); the reflux pipe (20) is fixedly connected to the liquid storage tank (6); and a pH value detection sensor (21) is arranged between the third electromagnetic three-way valve (19) and the liquid storage tank (6).

8. The spray structure for grid stress corrosion test according to claim 1, characterized in that: The drainage component comprises a drainage funnel (22); a mounting hole is provided at the bottom of the transparent shell (1); the drainage funnel (22) is fixedly connected in the mounting hole; a drainage pipe (23) is fixedly connected to the bottom of the drainage funnel (22); and the drainage pipe (23) is correspondingly arranged with the collection tank (4).

9. A working method of a spray structure for a grid stress corrosion test, based on the spray structure for a grid stress corrosion test according to any one of claims 1 to 8, characterized in that: The steps include: Step 1: determine the corrosion position and the number of devices to be set, sleeve the spray pipe (2) on the test piece, install the two transparent shells (1) on the test piece, and ensure that the spray pipe (2) is set inside the transparent shell (1), fix the transparent box with a fixing piece, and connect the spray pipe (2) to the liquid supply component with a delivery pipe (3); Step 2: Acid-base balance system: the liquid supply component delivers the corrosive liquid to the spray pipe (2) through the delivery pipe (3); the pH value detection system detects the pH value of the corrosive liquid; if the pH value is different from the preset value, the solution flows back to the liquid supply component; the acid-base balance system injects an acidic solution or an alkaline solution to adjust the pH value; Step 3: The spray pipe (2) uses a plurality of groups of nozzles arranged in an annular manner to spray the corrosive solution on different positions of the test piece to perform corrosion resistance testing; Step 4: Part of the acidic solution and the material shed from the specimen are collected by the drainage component and enter the filtering component. The filtered corrosive solution flows back into the liquid supply component and is modulated by the acid-base balance system and then re-sprayed into the spray pipe (2).

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