JP7315979B2 - Spray rate regulators, spray towers and spray corrosion testers - Google Patents

Description

The present disclosure relates to spray rate regulators, spray towers and spray corrosion testers.

It is known to use a spray corrosion tester to evaluate the durability of various parts and materials against environmental deterioration. In the test performed by the spray corrosion tester, the sample is placed in a test tank and exposed to heating, humidification, and spray environment. In general, a spray corrosion tester has a cylindrical spray tower arranged within a test tank. The spray tower is equipped with a sprayer having an air nozzle and a liquid nozzle, and the sprayed liquid in the liquid nozzle sucked up by the compressed air ejected from the air nozzle is released as fine particles from the spray tower into the test chamber. Further, the tests carried out by the spray corrosion tester include neutral salt spray test, acetic acid acid salt spray test, CASS test, etc., depending on the solution to be sprayed. For these tests, for example, the neutral salt spray test and acetic acid salt spray test are 35°C ± 2°C, and the CASS test is 50°C ± 2°C. It is Therefore, in order to ensure the accuracy of the test, the spray corrosion tester does not vary the amount, temperature, etc. of the spray liquid discharged from the spray tower depending on the position in the test tank (e.g.・80 cm ² ) is required.

For example, the spray tower disclosed in Patent Document 1 is arranged near the inner wall of the test chamber of the spray corrosion tester (in other words, not at the center but at the end of the test chamber). The spray tower is equipped with a back wind direction plate in the part located on the inner wall side of the test tank, so that the amount of sprayed liquid varies depending on the position in the test tank where the sprayed liquid discharged from the spray tower reaches. prevent this from happening.

Japanese Patent No. 6675741

The spray tower disclosed in Patent Document 1 is arranged near the inner wall of the test tank. However, in the spray corrosion tester, the spray tower is not necessarily arranged near the inner wall of the test chamber. Therefore, when the spray tower described in Patent Document 1 is arranged other than near the inner wall of the test tank, the amount of sprayed liquid varies depending on the position in the test tank where the sprayed liquid released from the spray tower reaches. There is

Therefore, an object of the disclosure of the present application is to provide a spray amount adjuster, a spray tower, and a spray corrosion tester that reduce variations in the amount of the sprayed liquid at the position where the sprayed liquid reaches in the test tank. Other optional additional effects of the disclosure in the present application will be made clear in the detailed description.

(1) A spray amount adjuster provided in a spray tower placed in a test tank of a spray corrosion tester,
The spray amount regulator is
a spray rate regulator fixture for fixing in place on the spray tower;
an upper surface;
a plurality of wind deflectors;
including
When the spray tower is placed in the test tank, when the surface of the wind direction plate facing the inner wall of the test tank is defined as the first surface, the width of the first surface is set according to the distance from the opposing inner wall. there is
Atomization volume regulator.
(2) The width of the first surface increases as the distance from the opposing inner wall of the test chamber decreases,
The spray amount regulator according to (1) above.
(3) There are four wind direction plates, and the spray amount adjusters are arranged at 90 degrees from the center in the vertical direction.
The spray amount regulator according to (1) or (2) above.
(4) The widths of the first surfaces of the four wind direction plates are selected from any of the following (a) to (e):
The spray amount regulator according to (3) above.
(a) The widths of the first surfaces of the opposing wind deflectors are the same, but the widths of the first surfaces of the adjacent wind deflectors are different.
(b) in two combinations of opposing deflectors, the widths of the first faces of the opposing deflectors of one set are the same, but the widths of the first faces of the opposing deflectors of the other set are different, In addition, the widths of the first surfaces of the adjacent wind direction plates are different.
(c) The width of the first surface of three of the four wind deflectors is the same, and the width of the first surface of the three wind deflectors is greater than the width of the first surface of the remaining one wind deflector. .
(d) the widths of the first surfaces of the opposing wind deflectors are different;
(e) The widths of the first surfaces of the four wind direction plates are the same.
(5) having an inverted conical directional body on the bottom surface of the top surface;
The spray amount adjuster according to any one of (1) to (4) above.
(6) the spray amount adjuster according to any one of (1) to (5) above;
a barrel;
including, spray towers.
(7) The spray tower according to (6) above is provided in the test tank,
Spray corrosion tester.

Variation in the amount of the sprayed liquid at the position reached by the sprayed liquid in the test chamber of the spray corrosion tester can be reduced.

Schematic diagram showing an example of a spray corrosion tester 100 equipped with a spray tower 1. FIG. FIG. 2A is a schematic diagram of the top of the spray tower 1. FIG. FIG. 2B is a schematic view of the spray tower 1 excluding the upper surface portion 12B and the direction body 12D as seen from above in the vertical direction. FIG. 4 is a diagram showing an arrangement example of wind direction plates 12C when the spray tower 1 is arranged at each position in the test chamber 2; FIG. 4 is a diagram showing an arrangement example of wind direction plates 12C when the spray tower 1 is arranged at each position in the test chamber 2; The figure which shows the measurement position in the test tank 2 in an Example.

Hereinafter, embodiments of the spray amount regulator 12, the spray tower 1, and the spray corrosion tester 100 will be described in detail with reference to the drawings. In this specification, members having the same type of function are given the same or similar reference numerals. Further, repetitive descriptions of members denoted by the same or similar reference numerals may be omitted.

In addition, the position, size, range, etc. of each configuration shown in the drawings may not represent the actual position, size, range, etc., in order to facilitate understanding. As such, the disclosures in this application are not necessarily limited to the locations, sizes, ranges, etc. disclosed in the drawings.

(Embodiment of spray tower)
A spray tower 1 according to an embodiment will be described with reference to FIGS. 1 to 3. FIG. FIG. 1 is a schematic diagram showing an example of a spray corrosion tester 100 equipped with a spray tower 1. FIG. FIG. 2A is a schematic diagram of the top of the spray tower 1. FIG. FIG. 2B is a schematic view of the spray tower 1, excluding the upper surface portion 12B and the direction body 12D, viewed from above in the vertical direction. FIG. 3A is a diagram showing an arrangement example of the wind direction plate 12C when the spray tower 1 is arranged in the center of the test tank 2. FIG. 3B to 3D are diagrams showing examples of arrangement of the wind direction plate 12C when the spray tower 1 is arranged at a position deviated from the center of the test tank 2. FIG.

A spray tower 1 according to the embodiment is arranged in a test chamber 2 of a spray corrosion tester 100 and includes at least a cylindrical portion 11 and a spray amount adjuster 12 . Then, the spray tower 1 releases the spray liquid that has become fine particles. In the example shown in FIG. 1, the spray tower 1 optionally includes a sprayer 13 . The spray corrosion tester 100 shown in FIG. 9, the spray corrosion tester 100 shown in FIG. 1 is merely an example. The spray corrosion tester 100 disclosed in the present application includes at least a spray tower 1 and a test tank 2, but other configurations may be omitted or arbitrary configurations may be added. In addition, in this specification, the solution discharged from the spray tower 1 is referred to as "spray liquid" regardless of before and after discharge from the spray tower 1 and regardless of its shape.

The tubular portion 11 is a tubular member extending in the vertical direction. A spray amount adjuster 12 , which will be described later, is arranged on the upper portion of the cylindrical portion 11 . The cross-sectional shape in the horizontal direction of the cylindrical portion 11 is not particularly limited as long as the cylindrical portion 11 can discharge the spray liquid from the spray tower 1 . Examples of the cross-sectional shape include a circular shape, an elliptical shape, an oval shape such as an egg shape and an oval shape, and a polygonal shape such as a triangle and a square. Further, the tubular portion 11 may be provided with a plurality of air circulation holes (not shown) in the lower portion of the tubular portion 11 .

The spray amount adjuster 12 adjusts so that the variation in the amount of the spray liquid at the position where the spray liquid discharged from the spray tower 1 reaches becomes small. The spray amount adjuster 12 will be described more specifically with reference to FIG. 2 . The spray amount adjuster 12 includes at least a spray amount adjuster fixing portion 12A, an upper surface portion 12B, and a plurality of wind direction plates 12C. As will be described later, when the spray tower 1 is placed in the test chamber 2, the wind direction plate 12C faces the inner wall 21 of the test chamber 2. When the surface of the wind direction plate 12C is defined as the first surface, the first surface The widths a1 to a4 are set according to the distances from the inner wall 21 facing each other. The spray rate regulator 12 may optionally include a director 12D, a post 12E, a screw 12F and a level 12G.

The spray amount adjuster fixing portion 12A is loosely fitted on the upper outer periphery of the cylindrical portion 11, and by inserting a screw 12F into a screw hole (not shown) provided on the side surface, the spray amount adjuster is fixed by tightening the screw 12F. 12 is fixed to the upper portion of the tubular portion 11 . Alternatively, the spray amount adjuster fixing portion 12A may be fixed to the cylindrical portion 11 using an adhesive or the like.

In the example shown in FIG. 2, the upper surface portion 12B is fixed via two struts 12E erected vertically from the spray amount adjuster fixing portion 12A. Alternatively, two or more of the plurality of wind direction vanes 12C may function as the struts 12E. In other words, the spray amount adjuster 12 does not have to have the strut 12E. Moreover, the horizontality of the spray amount adjuster 12 can be confirmed by the level 12G provided on the upper part of the upper surface portion 12B.

By fixing the spray amount adjuster 12 to the upper portion of the cylindrical portion 11, an opening 14 is formed between the upper end of the cylindrical portion 11 and the upper surface portion 12B. Spray liquid is discharged from the spray tower 1 through this opening 14 .

As shown in FIGS. 2A and 2B, the wind direction plate 12C is provided between the spray amount adjuster fixing portion 12A and the upper surface portion 12B, and controls the flow of the spray liquid. When the spray tower 1 is arranged in the test chamber 2 of the spray corrosion tester 100, the wind direction plates 12C are arranged in the spray amount adjuster 12 so as to face the inner walls 21 of the test chamber 2, respectively. The width of the surface of the wind direction plate 12</b>C facing the inner wall 21 is set according to the distance from the inner wall 21 .

The vertical shape of the test chamber 2 of the spray corrosion tester 100 is generally rectangular. For example, it is assumed that the center of the spray tower 1 is arranged at the center of the test tank 2 as shown in FIG. 3A. Then, the length of the perpendicular from the center of the spray tower 1 to the short side 21A of the inner wall 21 of the test tank 2 is defined as L2a and L2b, and the length from the center of the spray tower 1 to the long side 21B of the inner wall 21 of the test tank 2 Define the lengths of the perpendiculars as L3a and L3b. In the example shown in FIG. 3A, on the same plane viewed from the vertical direction, the distance (L1) between the center of the spray tower 1 and one corner 22 of the test tank 2 is the test that sandwiches one corner 22 from the center of the spray tower 1. The length of the perpendicular to the short side 21A of the inner wall 21 of the tank 2 (L2b) and the length of the perpendicular to the long side 21B of the inner wall 21 of the test tank 2 across the corner 22 from the center of the spray tower 1 (L3a) growing. The sprayed liquid discharged from the spray tower 1 freely falls onto the sample S because the force in the direction of gravity is applied to the sprayed liquid in the test tank 2 . Therefore, when the spray amount adjuster 12 does not have the wind direction plate 12C, the amount of the spray liquid reaching the short side 21A and the long side 21B of the inner wall 21 decreases toward the corner 22 of the test chamber 2. The wind direction plate 12C provided in the spray amount adjuster 12 is adjusted so as to reduce variations in the amount of sprayed liquid that reaches even when the distances that the sprayed liquid reaches are different.

Specifically, as described above, the test chamber 2 of the spray corrosion tester 100 is generally rectangular when viewed vertically. Therefore, as shown in FIG. 3A, when the wind direction plates 12C are arranged so as to face the inner wall 21 of the test chamber 2, four wind direction plates 12C are arranged. The four wind direction plates 12C are arranged at positions approximately 90 degrees from the center of the spray amount adjuster 12 in the vertical direction. By arranging the wind direction plate 12C at a position facing the inner wall 21 of the test tank 2, the amount of spray liquid reaching the inner wall 21 closest to the spray tower 1 is reduced, and the spray reaching the corner 22 of the test tank 2 is reduced. Increase liquid volume. In other words, the wind direction plate 12C is not a guide plate that guides the direction in which the spray is discharged, but a baffle plate that prevents the spray from directly reaching the inner wall 21 near the spray tower 1.

The amount of the spray liquid that reaches can be adjusted by changing the width of the first surfaces a1 to a4, which are the surfaces facing the inner wall 21 of the wind direction plate 12C. Specifically, as shown in FIGS. 3A to 3D, the widths a1 to a4 of the first surface of the air deflector 12C are increased as the distance between the air deflector 12C and the facing inner wall 21 decreases. By setting the widths a1 to a4 of the first surface of the wind direction plate 12C according to the distances from the inner walls 21 facing each other, the respective inner walls 21 can be reached even if the distances between the wind direction plate 12C and the inner walls 21 are different. Variation in the amount of spray liquid can be reduced.

3A to 3D, an arrangement example of the wind direction plate 12C is shown more specifically. 3A to 3D are views of the test chamber 2 viewed from the vertical direction. 3A to 3D are for explaining the function of the wind direction plate 12C, the description of the strut 12E is omitted.

In the example shown in FIG. 3A, the center of the spray tower 1 is located at the center of the test tank 2 (L3a=L3b<L2a=L2b).

In the example shown in FIG. 3B, the center of the spray tower 1 is different from the center of the short side 21A (L3a=L3b) in the direction parallel to the short side 21A, and the center of the long side 21B in the direction parallel to the long side 21B. (L2a≠L2b). However, in the example shown in FIG. 3B, L2a<L3a=L3b<L2b.

In the example shown in FIG. 3C, the center of the spray tower 1 is different from the center of the short side 21A (L3a=L3b) in the direction parallel to the short side 21A, and the center of the long side 21B in the direction parallel to the long side 21B. (L2a≠L2b). However, in the example shown in FIG. 3C, L2a=L3a=L3b<L2b.

In the example shown in FIG. 3D, the center of the spray tower 1 is different from the center of the short side 21A in the direction parallel to the short side 21A (L3a≠L3b), and the direction parallel to the long side 21B is also the center of the long side 21B. are located at different positions (L2a≠L2b). However, in the example shown in FIG. 3D, L2b<L3a<L3b<L2a.

In the example shown in FIG. 3A, the distance between the center of the spray tower 1 and the short side 21A and the long side 21B of the inner wall 21 of the test chamber 2 is L3a=L3b<L2a=L2b. Therefore, in the example shown in FIG. 3A, the relationship between the widths a1 to a4 of the first surface of the air deflector 12C is a1=a2>a3=a4 from the distance between the air deflector 12C and the inner wall 21 facing the air deflector 12C. . In other words, the widths of the first surfaces of the opposing wind deflectors 12C are the same, but the widths of the first surfaces of the adjacent wind deflectors 12C are different.

In the example shown in FIG. 3B, the distance between the center of the spray tower 1 and the short side 21A and the long side 21B of the inner wall 21 of the test tank 2 is L2a<L3a=L3b<L2b. Therefore, in the example shown in FIG. 3B, the relationship between the widths a1 to a4 of the first surface of the air deflector 12C is a4<a1=a2<a3 from the distance between the air deflector 12C and the inner wall 21 facing the air deflector 12C. . In other words, in two combinations of opposing baffles 12C, the width of the first surfaces of one set of opposing baffles 12C is the same, while the width of the first surfaces of the other set of opposing baffles is The widths of the first surfaces of the adjacent wind direction plates 12C are different. In the example shown in FIG. 3B, the center of the spray tower 1 is shifted in the direction of the long side 21B. is clear.

In the example shown in FIG. 3C, the distance between the center of the spray tower 1 and the short side 21A and the long side 21B of the inner wall 21 of the test chamber 2 is L2a=L3a=L3b<L2b. Therefore, in the example shown in FIG. 3C, the relationship between the widths a1 to a4 of the first surface of the air deflector 12C is a4<a1=a2=a3 from the distance between the air deflector 12C and the inner wall 21 facing the air deflector 12C. . In other words, the width of the first surface of three of the four wind direction plates 12C is the same, and the width of the first surface of the three wind direction plates 12C is the same as that of the first surface of the remaining one wind direction plate 12C. Greater than width.

In the example shown in FIG. 3D, the distance between the center of the spray tower 1 and the short side 21A and the long side 21B of the inner wall 21 of the test chamber 2 is L2b<L3a<L3b<L2a. Therefore, in the example shown in FIG. 3D, the relationship between the widths a1 to a4 of the first surface of the air deflector 12C is a3<a2<a1<a4 from the distance between the air deflector 12C and the inner wall 21 facing the air deflector 12C. . In addition, although L2b<L3a in the example shown in FIG. 3D, it is also assumed that the spray tower 1 is arranged at a position where L2b=L3a. In the example shown in FIG. 3D, it can be said that the widths of the first surfaces of the facing wind direction plates 12C are different, including the position where L2b=L3a.

3A to 3D are examples of a general rectangular shape when the test tank 2 is viewed in the vertical direction. When the test chamber 2 is viewed in the vertical direction, for example, even in the case of a quadrangle other than a rectangle such as a square or a trapezoid, or a polygon such as a hexagon, the wind direction plate 12C is provided according to the number of inner walls, and the distance from the inner wall 21 The width of the airflow direction plate 12C may be set according to . For example, if the test tank 2 has a square shape (not shown) when viewed in the vertical direction, the widths a1 to a4 of the first surfaces of the four wind direction plates 12C may be set to be the same.

3A to 3D are examples for specifically showing the arrangement of the air deflector 12C, and are not limited to the illustrated examples. There are no restrictions on the arrangement of the air deflector 12C within the scope of the technical idea disclosed in the present application. For example, in the example shown in FIG. 3B, if the spray tower 1 is placed further to the left of the test chamber 2, the width of a3 will be greater while the width of a4 will be further decreased. If the width of a4 is so small that the variation in the amount of sprayed liquid that reaches can be almost ignored depending on the presence or absence of a4, a4 may not be provided. In this specification, when "the width of the first surface is set according to the distance from the opposing inner wall", the width of the first surface is set to zero, in other words, when the wind direction plate 12C is not formed is also included. Therefore, the number of wind direction plates 12 may be the same as the number of inner walls 21 of the test chamber 2 or may be smaller than the number of inner walls 21 .

The spray amount adjuster 12 disclosed in the present application can reduce variation in the amount of the sprayed liquid depending on the position where the sprayed liquid reaches in the test tank 2 by providing the wind direction plate 12C. Furthermore, as in an embodiment described later, the spray amount adjuster 12 can reduce temperature variations due to differences in position within the test tank 2 by controlling the flow of the spray liquid discharged by the wind direction plate 12C.

For the test performed by the spray corrosion tester 100, it is necessary to keep the temperature around the sample S in the test tank 2 at a temperature of 35°C±2°C, 50°C±2°C, or the like. In the example shown in FIG. 1, the spray corrosion tester 100 includes a humidity generator 6 and a steam pipe 7, and the steam generated by the humidity generator 6 is introduced into the test chamber 2 through the steam pipe 7 to to heat. The fact that the spray liquid is evenly discharged regardless of the position of the test tank 2 by the wind direction plate 12C means that the flow of the spray liquid from the spray tower 1 is not uneven, and the flow of the spray liquid from the steam pipe 7 to the test tank 2 is not caused. It also has a positive effect on the flow of steam introduced. Therefore, by arranging the wind direction plate 12C as shown in FIGS. 3A to 3D, when the inside of the test tank 2 is heated, the temperature variation due to the difference in position can be reduced. Furthermore, by reducing variations in temperature in the test chamber 2, evaporation of the spray liquid due to local differences in temperature can be prevented, and variations in the salt concentration and pH of the spray liquid can be reduced.

The wind deflector 12C affects the amount and temperature of the spray liquid reaching each location in the chamber 2. FIG. Therefore, the relative relationship of the width of the first surface of the wind direction plate 12C is as described above. Depending on the conditions, the amount of the sprayed liquid reaching each position in the test chamber 2 and the temperature variation at each position may be set as appropriate.

The spray amount adjuster 12 may have a direction body 12D on the upper surface portion 12B. The direction body 12D adjusts the direction of the spray liquid discharged from the spray tower 1. The direction body 12D is not particularly limited as long as it directs the sprayed liquid rising from the inside of the cylindrical portion 11 toward the opening 14 direction. For example, an inverted cone shape may be used, or an inverted quadrangular pyramid shape may be used in which side ribs are arranged at positions facing the wind direction plate 12C. In addition, the direction body 12D in the shape of an inverted cone or an inverted quadrangular pyramid may be straight or curved from the apex of the cone to the upper surface portion 12B. By providing the direction body 12</b>D to the spray amount adjuster 12 , the spray liquid in the form of fine particles can be efficiently discharged from the opening 14 .

In the spray tower 1 according to the embodiment, the atomizer 13 is an optional additional component. The sprayer 13 is arranged inside the cylindrical portion 11 . The sprayer 13 has a liquid nozzle 13A and an air nozzle 13B. The sprayer 13 is formed integrally with a block so that the tip of the liquid nozzle 13A and the tip of the air nozzle 13B are close to each other in the same plane. The sprayed liquid is sucked up from the liquid nozzle 13A by compressed air ejected from the air nozzle 13B, becomes fine particles, and is discharged from the opening 14 formed by the upper end of the cylinder 11 and the upper surface portion 12B of the spray amount adjuster 12. . The atomizer 13 is not particularly limited as long as it can emit the atomized liquid as fine particles.

(Embodiment of spray amount regulator)
Of the spray tower 1 according to the above-described embodiment, for the tubular portion 11 and the sprayer 13, existing parts of the spray tower can be used as they are. That is, in the spray tower 1 according to the above-described embodiment, existing parts may be used for the cylindrical portion 11 and the sprayer 13, and only the spray amount adjuster 12 may be newly provided. Although the size of the test tank 2 varies depending on the type of the spray corrosion tester 100, once the size of the test tank 2 and the arrangement position of the spray tower 1 are determined, the width of the first surface of the wind direction plate 12C is set as described above. A volume regulator 12 can be manufactured and provided. The embodiment of the spray amount adjuster 12 has already been described in the embodiment of the spray tower 1 described above. Therefore, the description of the embodiment of the spray amount adjuster is omitted.

The spray amount adjuster 12 according to the above embodiment and the spray tower 1 including the spray amount adjuster 12 have the following effects.
(1) By arranging the spray tower 1 equipped with the wind direction plate 12C in the test tank 2 of the spray corrosion tester 100, it is possible to reduce the variation in the amount of the sprayed liquid depending on the position in the test tank 2 where the sprayed liquid reaches. . Therefore, the test in the spray corrosion tester 100 can be performed with high accuracy.
(2) The wind direction plate 12C can reduce temperature variations due to differences in position within the test chamber 2. FIG.
(3) The wind direction plate 12C prevents the spray liquid from evaporating due to local differences in temperature, and can reduce variations in the salt concentration and pH of the spray liquid.
(4) When the spray amount adjuster 12 is provided with the direction member 12</b>D, the spray liquid in the form of fine particles can be efficiently discharged from the opening 14 .

(Embodiment of spray corrosion tester)
The spray corrosion tester 100 includes at least a spray tower 1 and a test tank 2 in which the spray tower 1 is arranged. Optionally, the solution reservoir 3, the solution replenishing tank 4, the air saturator 5, the humidity generator 6, the steam pipe 7, the spray liquid sampler 8, and the spray liquid sampling amount checker 9 are installed in the spray corrosion tester 100. You may comprise as a component. The spray tower 1 that the spray corrosion tester 100 has has already been described in the embodiment of the spray tower 1 . Therefore, a repetitive description of the spray tower 1 will be omitted.

The spray corrosion tester 100 according to the embodiment can test the deterioration of the sample S by exposing the sample S installed in the test tank 2 to a state such as spraying. There is no particular limitation as long as it is released and tested.

A sample S is placed in the test chamber 2, and tests such as a neutral salt water spray test, an acetic acid acid salt water spray test, a CASS test, and the like are performed. In the example shown in FIG. 1 , the spray corrosion tester 100 has a case 23 and a top cover 24 . The test chamber 2 is formed by a case 23 and an upper lid 24. As shown in FIG. When the case 23 is covered with the upper lid 24, a water seal portion 25 is formed to isolate the environment inside the test chamber 2 from the outside environment. The water seal part 25 is formed by putting the upper lid 24 on the case 23 so that the upper lid 24 fits in the recess in the upper part of the case 23 and filling the recess with water. The case 23 and the upper lid 24 are not particularly limited as long as they are made of materials that are not corroded by the solution used in the test. Examples thereof include polyvinyl chloride, polypropylene, polycarbonate, acrylic resin, and titanium.

A solution reservoir 3 is arranged directly below the spray tower 1 and is connected to a solution make-up tank 4 through a conduit. The spray liquid is stored in the solution reservoir 3 in the test tank 2 before being supplied to the liquid nozzle 13A. In this case, the temperature of the sprayed liquid in the solution reservoir 3 can be the same as the temperature in the test chamber 2 . Further, a structure in which the lower portion of the cylindrical portion 11 and the upper portion of the solution reservoir 3 are communicated with each other may be employed. In this case, of the sprayed liquid that has become fine particles sprayed from the liquid nozzle 13A, the sprayed liquid adhering to the inner wall of the cylindrical portion 11 flows down along the inner wall of the cylindrical portion 11 and is collected in the solution reservoir 3.

The air saturator 5 is for making pressure-regulated compressed air saturated air (saturated compressed air), and contains water therein. The saturated air generated in the air saturator 5 is sent to the air nozzle 13B through the air supply pipe.

The humidity generator 6 is provided with a heater in a container containing water, and the heater heats the water to generate steam. Then, steam is introduced into the test chamber 2 through a steam pipe 7 that is wound around the inner bottom of the test chamber 2 without using an air blowing means or the like, and the inside of the test chamber 2 is heated to 35°C ± 2°C, 50°C ± 2°C, for example. It is heated to a predetermined temperature such as °C. The humidity generator 6 generally controls the temperature of the air in the test chamber 2 by turning the heater on and off, using the temperature of the air in the test chamber 2 as a reference.

The sprayed liquid dropped onto the sprayed liquid sampler 8 reaches the sprayed liquid sampled amount checker 9 installed outside the test tank 2 through a conduit. The amount of spray liquid collected is read on the scale of the spray liquid collection amount checker 9, the average amount of spray liquid collected per hour is calculated, and the amount of spray liquid collected by each spray liquid sampler 8 is measured to ensure uniformity of the spray liquid. gender can be confirmed.

A spray corrosion tester 100 according to the embodiment is characterized by including a spray tower 1 including a spray amount adjuster 12 in a conventional spray corrosion tester. By using the spray corrosion tester 100 according to the embodiment, the same effect as the spray tower 1 according to the embodiment described above can be obtained.

Examples are provided below to specifically describe the embodiments disclosed in the present application, but the examples are merely for the purpose of describing the embodiments. It is not intended to limit or limit the scope of the inventions disclosed in this application.

<Measurement of spray liquid amount, salt concentration, and temperature in salt spray test>
[Example 1]
In a salt water spray test using a spray corrosion tester 100 in which a spray tower 1 including a spray amount adjuster 12 is placed in the center of the test tank 2, the amount of sprayed liquid in the test tank 2, the salt concentration of the sprayed liquid, and the temperature are measured. bottom. The amount of the sprayed liquid, the salt concentration of the sprayed liquid, and the temperature were measured at each position A to H in the test chamber 2 viewed from the vertical direction shown in FIG. 4 (the temperature was not measured at D and E). The width of the first surface of the wind direction plate 12C facing the inner wall 21 of the test chamber 2 when viewed from the vertical direction is a1 to a4 as shown in FIG. Measurement conditions are shown below.

〔Measurement condition〕
Salt spray test Test chamber size: Width (long side viewed from the vertical direction) 900 mm x depth (short side viewed from the vertical direction) 600 mm x height 400 mm
Heating method: Steam heating method (two steam pipes are arranged in the width direction of the test tank 2 (approximately AC position and approximately FH position in FIG. 4))
Test chamber setting temperature: 35°C
Air saturator temperature: 47°C
Spray pressure: 0.098 MPa
Height of measurement position: 310 mm from the test chamber floor
Width of the first surface of the wind direction plate: a1 = a2 = 6 mm, a3 = a4 = 3 mm

[Comparative Example 1]
It is the same as Example 1 except that the spray amount adjuster 12 of the spray tower 1 was not provided with the wind direction plate 12C.

Table 1 shows the amount of spray liquid, salt concentration and temperature measured at each position A to H. The bottom row of Table 1 shows the minimum and maximum values measured at each position A to H.

As can be seen from Table 1, Example 1 provided with the wind direction plate 12C showed smaller variations than Comparative Example 1 in all of the amount of sprayed liquid, salt concentration and temperature. Therefore, by arranging the wind direction plate 12C as shown in FIG. 4, it was shown that the amount of the spray liquid reaching each of the positions A to H is approximately the same. Further, conventionally, a steam heating method has been used for heating the test chamber 2 as a method capable of reducing variations in temperature depending on the position within the test chamber 2 . However, in Example 1, the variation in temperature was smaller than in Comparative Example 1. This is because the flow of the spray liquid discharged from the spray tower 1 was not biased due to the provision of the wind direction plate 12C, and the flow of steam introduced into the test tank 2 was favorably affected. It is considered that the scatter of Furthermore, it is thought that the reduction in temperature variation prevented the spray liquid from evaporating due to local differences in temperature, and the variation in the salt concentration of the spray liquid was also reduced.

From the above results, the spray tower 1 including the spray amount adjuster 12, when the spray tower 1 is arranged in the test tank 2, the width of the first surface of the wind direction plate 12C facing the inner wall 21 of the test tank 2 is It was shown that by setting according to the distance from the opposing inner wall 21 , variations in the amount of the sprayed liquid and temperature depending on the position in the test chamber 2 are reduced. Therefore, the spray corrosion tester 100 in which the spray tower 1 including the spray amount adjuster 12 disclosed in the present application is arranged can perform the test with high accuracy.

(Other modifications)
Although some examples of embodiments have been described above, the disclosure in the present application is not limited to these embodiments and the like, and various modifications are possible. For example, in the above embodiment and the like, the configuration (shape, arrangement, number, etc.) of each device in the spray amount adjuster 12, the spray tower 1, and the spray corrosion tester 100 was specifically described, but these configurations are not limited to those described in the above embodiments and the like, and may be other shapes, arrangements, numbers, and the like. Specifically, for example, the number of airflow direction plates 12C provided in the spray amount adjuster 12 has been described as four, but the number may be less than or more than four. In addition, the width of the first surface of the wind direction plate 12C is appropriately adjusted according to the size of the test tank 2, the position where the spray tower 1 is arranged, the heating temperature, the shape of the steam pipe 7, the heating method, and the like. may Further, the first surface of the wind direction plate 12C has a substantially trapezoidal shape by increasing the width on the side of the spray amount adjuster fixing portion 12A when provided between the spray amount adjuster fixing portion 12A and the upper surface portion 12B. For example, the shape of the other surface may be adjusted as appropriate.

The spray amount adjuster, spray tower, and spray corrosion tester disclosed in the present application can reduce the variation in the amount of the sprayed liquid depending on the position in the test tank where the sprayed liquid reaches, and the test in the spray corrosion tester can be performed with high accuracy. . Therefore, it is useful for those dealing with spray rate regulators, spray towers and spray corrosion testers.

DESCRIPTION OF SYMBOLS 1... Spray tower, 11... Cylindrical part, 12... Spray amount adjuster, 12A... Spray amount adjuster fixed part, 12B... Upper surface part, 12C... Wind direction plate, 12D... Direction body, 12E... Strut, 12F... Screw, 12G Level gauge 13 Sprayer 13A Liquid nozzle 13B Air nozzle 2 Test tank 21 Inner wall 21A Short side 21B Long side 22 Corner 23 Case 24 Upper lid 25 Water seal portion 3 Solution reservoir 4 Solution replenishing tank 5 Air saturator 6 Humidity generator 7 Steam pipe 8 Spray liquid sampler 9 Spray liquid sampling amount checker 100 ... spray corrosion tester, a1 to a4 ... width of the first surface, L1 ... distance between the center of the spray tower 1 and the corner 22, L2a, L2b, L3a, L3b ... perpendicular line from the center of the spray tower 1 to the inner wall 21, S... sample

Claims (1)

A spray corrosion tester comprising a test tank and a spray tower provided in the test tank,
The spray tower includes a spray amount regulator and a cylinder,
The spray amount regulator is
a spray rate regulator fixture for fixing in place on the spray tower;
an upper surface;
four wind direction plates;
including
When the spray tower is placed in the test chamber, the surface of the wind deflector facing the inner wall of the test chamber is defined as the first surface. The smaller the distance from the inner wall, the larger the
The four wind direction plates are
The spray amount adjusters are arranged at positions approximately 90 degrees from the center in the vertical direction, and
It is arranged so that the angle of intersection when the first surfaces of the adjacent wind direction plates are virtually extended is about 90 degrees.
Spray corrosion tester .