JP2011080849A - Corrosion testing machine provided with temperature-sensing resistor washing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To shorten the time arriving at a definite value in temperature and humidity by automatically washing a temperature sensing resistor to obtain accurate temperature and humidity measured values in a corrosion testing machine incorporating the cycle prescribed in a program to execute the corrosion test of a test piece, to facilitate the transfer to a next test in a transfer time within a definite range defined in JIS, and to enhance the reproducibility of the corrosion state in the natural world. <P>SOLUTION: The temperature-sensing resistor washing device (68) for the corrosion testing machine includes: a washing solution supply means (69), having a washing nozzle (70) for jetting a washing solution to the temperature-sensing resistor (57); and a control means (67) for controlling the driving of the washing solution supply means (69) to jet the washing solution from the washing nozzle (70). <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a corrosion tester for performing a corrosion test in a cycle defined in a program provided with a resistance temperature detector cleaning device, and a resistance temperature detector cleaning device for cleaning a resistance temperature detector of a corrosion tester The present invention relates to a corrosion testing machine provided with

The corrosion tester is used for metal surface treatment such as painting, plating, alumite and the like, and for evaluating the corrosiveness (rust prevention and corrosion resistance) of metal materials.
Such corrosion testers include various test machines such as a salt spray tester, a salt dry / wet combined cycle tester, and a gas corrosion tester.
The combined cycle tester reproduces the natural environment by repeating the cycle corrosion test, ie, the salt spray test, the dry test and the wet test, which are carried out in a test tank in a cycle specified in the program. Tests specimens, faithfully reproduces the corrosion state in nature, and can artificially know the corrosivity of specimens in a short time, such as automobiles, homes, home appliances, daily life products, etc. Used for testing all industrial products.
Further, in the combined cycle tester, it is known that the transition time when the set conditions of each test are changed affects the corrosion result of the test piece, which is regarded as important. For this reason, the Japanese Industrial Standard defines the transition time to each test within a certain range.

JP-A-3-242546 JP, 2008-76051, A Corrosion sensor given in patent documents 1 monitors the corrosion rate for performing an exact test in a corrosion test, consists of a galvanic pair of the combination of zinc and platinum, and corrosion of zinc The product is removed. The salt spray device described in Patent Document 2 is provided with a cleaning nozzle that sprays cleaning water on a salt water nozzle.

Conventionally, in a corrosion tester that performs a combined cycle tester, during a salt spray test, a salt solution adheres to the temperature measuring resistance [S1] body (sensor) that measures temperature and humidity by salt water spray, and When moving to the drying test, the salt in the attached salt solution becomes a crystal, and the crystalized salt causes an error in the temperature measurement during the wet (high temperature) test performed after the completion of the drying test. I understood.
For example, the influence on the temperature measurement value when sodium chloride (salt) adheres to the resistance temperature detector is described as the test conditions: temperature 60 ° C./humidity 25% rh, temperature 50 ° C./humidity 95% rh, and two pairs of dry bulb resistance bulbs and wet bulb resistance bulbs are set in the thermostat, and sodium chloride (salt) is added to the pair of dry bulb resistance bulbs / wet bulb resistance bulbs. ), The dry bulb temperature / wet bulb temperature rises due to the influence of this sodium chloride (salt), and this tendency has a large effect on the wet bulb in the dry test, and the dry bulb in the wet test.・ Effects on both wet bulbs will increase. This is because, when sodium chloride (salt) adhering to the dry bulb resistance thermometer / wet bulb resistance thermometer absorbs moisture from the atmosphere, a latent heat is generated, and the measured value of temperature and humidity is higher than the actual value. It is considered to be.
The temperature and humidity are measured by measuring the dry bulb temperature and wet bulb temperature with each resistance temperature detector, and the humidity is a value obtained by substituting the measured value into a calculation formula of Japanese Industrial Standard.
Therefore, the humidity display [S2] obtained by substituting the actual temperature and humidity in the test tank, each temperature measured by the dry and wet bulb resistance thermometer, and each temperature measurement value into the calculation formula of the Japanese Industrial Standard An error occurs between the measured value and the time until the temperature and humidity reach a certain value due to the error in the temperature measurement value, which is delayed from the actual atmospheric humidity and displayed for a long time. There was a disadvantage that the time to reach a constant value of temperature and humidity was different from the actual time.
In addition, in order to make the transition time to the next test within a certain range determined by Japanese Industrial Standards, a pair of dry and wet bulb temperature measuring resistors are separately provided outside the test tank, except for the salt spray device. Although it is conceivable to add a function for automatically taking in and out the resistance temperature detector in order to use the resistance temperature detector, there is a disadvantage that the cost increases.

  Accordingly, an object of the present invention is to automatically measure the temperature and humidity by automatically washing the salt crystals adhering to the resistance temperature detector during the test in a corrosion tester for performing a cycle corrosion test of the test piece. By shortening the time to reach a constant value of temperature and humidity, obtaining an accurate measurement value, it is easy to move to the next test with a transition time within a certain range defined in Japanese Industrial Standards, and An object of the present invention is to provide a corrosion tester provided with a resistance temperature detector cleaning device that improves the reproducibility of a corrosion state in nature.

  The present invention provides a resistance thermometer cleaning device for a corrosion tester for cleaning a resistance thermometer for measuring the temperature in a test tank of the corrosion tester in a corrosion tester for performing a cycle corrosion test of a test piece. The resistance temperature detector cleaning device for a corrosion tester has a cleaning liquid supply means having a cleaning nozzle for jetting a cleaning liquid to the resistance temperature detector, and drives and controls the cleaning liquid supply means to jet the cleaning liquid from the cleaning nozzle. It is characterized by comprising a control means.

  The corrosion tester equipped with the resistance temperature detector cleaning device of the present invention automatically cleans the resistance temperature detector to eliminate the influence of salt crystals, accurately measure the wet and dry temperature, and maintain a constant temperature and humidity. The time to reach the value is shortened, the transition to the next test is facilitated with a transition time within a certain range defined in Japanese Industrial Standards, and the reproducibility of the corrosion state in nature is improved.

FIG. 1 is a cross-sectional view of a combined cycle testing machine. Example 1 FIG. 2 is a cross-sectional view of a dry bulb temperature measuring cleaning nozzle disposed in the vicinity of the dry bulb temperature measuring resistor. Example 1 FIG. 3 is a cross-sectional view of a wet bulb temperature measuring cleaning nozzle disposed in the vicinity of the wet bulb temperature measuring resistor. Example 1 FIG. 4 is a flowchart showing steps of each test and resistance temperature detector cleaning. Example 1 FIG. 5 is an enlarged cross-sectional view of the cleaning nozzle. (Example 2) FIG. 6 is a schematic perspective view in which two cleaning nozzles are arranged. Example 3

  This invention shortens the time to reach a constant value of temperature and humidity by obtaining an accurate measurement value, facilitates the transition to the next test with a transition time within a certain range defined in Japanese Industrial Standards, and The purpose of improving the reproducibility of the corrosion state in nature is realized by automatically washing the resistance temperature detector.

1 to 4 show Embodiment 1 of the present invention.
In FIG. 1, reference numeral 1 denotes a combined cycle tester exemplified as a corrosion tester for performing a corrosion test on a test piece in a cycle defined by a program.
The combined cycle testing machine 1 includes a test tank 2 and a lid 3 at the top of the test tank 2. The test tank 2 includes a bottom member 4 and a cylindrical body 5 erected on the bottom member 4.
In the cylindrical body 5, a lower support plate 6 is placed on the upper surface of the bottom portion 4, and a partition member 7 is disposed near and in parallel with the bottom portion 4. 8 is partitioned and the test chamber 9 is partitioned above the partition member 7.
The partition member 7 includes a horizontal portion 11 that is supported by a support member 10 on the lower surface and extends in parallel with the bottom portion 4, and an upright cylindrical portion 12 that extends upward at a central portion of the test chamber 9.

The lower support plate 6 placed on the upper surface of the bottom portion 4 is provided with a hollow fixing shaft 14 that protrudes from the device space 8 into the test chamber 9 to form the shaft space 13 at the central portion. . A lower portion of the fixing shaft 14 passes through the bottom portion 4 and the lower support plate 6 and opens downward.
A salt spray means 15 is provided on the upper part of the fixing shaft 14.
The salt water spraying means 15 is fixed to the upper end of the fixing shaft 14 to store salt water, and the salt water container 16 is fixed to the upper part of the salt water container 16 so that the spray port 17 extends to the height position of the lid 3. A cylindrical spray cylinder 18, a salt water spray nozzle 19 disposed in the middle of the spray cylinder 18, and a compressed air nozzle 20 for spraying salt water from the salt water spray nozzle 19 into the spray cylinder 18 with compressed air. And.

A salt water amount adjusting float 21 is provided in the salt water container 16.
The salt spray nozzle 19 is connected to a salt water supply pipe 22 that guides salt water from the salt water container 16.
A compressed air supply pipe 23 that opens into the axial space 13 of the fixing shaft 14 is connected to the compressed air nozzle 20.
One end of a compressed air connection pipe 24 is connected to the lower end of the fixing shaft 14. An air compressor 25 is connected to the other end of the compressed air connection pipe 24. The compressed air generated by the air compressor 25 is supplied to the compressed air nozzle 20 through the compressed air connecting pipe 24, the axial space 13 of the fixing shaft 14, and the compressed air supply pipe 23.

In the device space 8, a lower fixing member 26 is provided on the outer peripheral surface of the lower portion of the fixing shaft 14.
The lower fixing member 26 is provided with a lower portion of a rotating cylinder 28 that is concentric with the fixing shaft 14 via a lower bearing 27 and that is larger than the diameter of the fixing shaft 14. . In this case, an annular running water space 29 is formed between the outer peripheral surface of the fixing shaft 14 and the inner peripheral surface of the rotating cylinder 28.
The upper portion of the rotating cylinder 28 is rotatably supported by an upper bearing 31 of an upper fixing member 30 attached to the lower surface of the salt water container 16.
In the device space 8, a driven gear 32 is fixed in the lateral direction at the lower part of the outer peripheral surface of the rotating cylinder 28. The driven gear 32 meshes with a drive gear 34 of a drive motor 33 attached to the upper surface of the lower support plate 6.
In the test chamber 9, below the salt water container 16, there is provided an upper support plate 35 that is installed at the upper end of the rising cylindrical portion 12 of the partition member 7 and loosely fits in the rotating cylinder 28.

A test piece frame 36 on which a plurality of test pieces P are placed in the test chamber 9 is attached to the upper portion of the rotating cylinder 28.
The test piece frame 36 is formed of a hollow pipe material that is in communication with an annular flowing water space 29 between the fixing shaft 14 and the rotating cylinder 28 and through which water can flow. A fixed support base portion 37 having a U-shaped cross section, a one-side annular portion 38 and another-side annular portion 39 that are connected to the upper portion of the support base portion 37, and the one-side annular portion 38 and the other-side annular portion 39. It consists of connecting arm portions 40 to be connected. The lower surface of the support base 37 is slidably mounted on the upper surface of the upper support plate 35.
Further, the test piece frame 36 is provided with a receiving plate 41 that holds the test piece P below the one side annular portion 38 and the other side annular portion 39. The one-side annular portion 38, the other-side annular portion 39, and the connection arm portion 40 are formed with a plurality of water ejection ports 42 that eject water for cooling the test piece P.
Further, a water supply pipe 43 disposed in the axial space 13 of the fixing shaft 14 and extending downward is communicated with the annular flowing water space 29 between the fixing shaft 14 and the rotating cylinder 28. The water supply pipe 43 communicates with the water container 45 through a water supply connection pipe 44. A water pump 46 is interposed in the middle of the water connection pipe 44.
When the driving cylinder 33 is driven and the rotating cylinder 28 is rotated, the test piece frame 36 is rotated along with the rotation of the rotating cylinder 28.

In the test chamber 9, a tube member 48 fixed to the upper part of the spray cylinder 18 is arranged extending in the horizontal direction so as to constitute the test piece cleaning means 47. The tube member 48 is formed with a plurality of test piece cleaning jets 49 through which cleaning liquid from an external water source (not shown) is jetted into the test chamber 9.
Further, in the test chamber 9, a hot air tube member 51 is disposed in the vicinity of the receiving plate 41 and in the outer periphery of the rotation range of the test piece frame 36 so as to constitute the drying means 50. This hot air tube member 51 guides hot air from an external hot air tank (not shown) to the test chamber 9.
Furthermore, in the test chamber 9, a water chamber 54 for storing water is formed by the partition plate 53 in the horizontal portion 11 and the rising cylindrical portion 12 of the partition member 7 so as to constitute the wetting means 52. . The water chamber 54 is provided with a heater 55 and a foaming nozzle 56.

A resistance temperature detector (sensor) 57 for measuring the temperature of the test chamber 9 is disposed in the test chamber 9.
As the resistance temperature detector 57, a dry bulb resistance temperature detector 58 and a wet bulb resistance temperature detector 59 are disposed in the upper part of the test chamber 9 in the first embodiment.
The dry bulb temperature measuring resistor 58 detects the dry air temperature, and is attached to the dry bulb temperature measuring titanium tube 60 and the tip of the dry bulb temperature measuring titanium tube 60 as shown in FIG. And a dry bulb temperature sensing unit (sensing unit) 61.
The wet bulb temperature measuring resistor 59 detects the moisture temperature, and is attached to the wet bulb temperature measuring titanium tube 62 and the tip of the wet bulb temperature measuring titanium tube 62 as shown in FIG. It comprises a wet bulb temperature sensing detector (sensing unit) 63. A wet bulb pot 65 is provided at the distal end of the wet bulb temperature measuring detector 63 via a communication pipe 64.
The dry bulb thermometer resistor 58 and the wet bulb thermometer resistor 59 are arranged adjacent to each other in parallel in each direction such as the horizontal direction and the vertical direction.

  The air compressor 25, the drive motor 33, the water pump 46, the dry bulb temperature measuring resistor 58, and the wet bulb temperature measuring resistor 59 are in communication with a control means 67 built in the control panel 66.

The combined cycle tester 1 includes a resistance temperature detector cleaning device 68 for a corrosion tester that automatically cleans a dry bulb resistance temperature detector 58 and a wet bulb resistance temperature detector 59 as the resistance temperature detector 57. It is done.
This resistance temperature detector cleaning device 68 not only prevents precipitation of salt crystals derived from salt water, but also precipitates a combination of a salt of an acid-derived anion and a salt-derived cation on the resistance temperature detector 57. It is intended to prevent or wash away lost items such as dust, and should be used as a corrosion tester not only in the combined cycle tester 1, but also in other corrosion testers such as salt spray testers and gas corrosion testers. Is possible.
As shown in FIG. 1, the resistance temperature detector cleaning device 68 includes the control means 67 and a cleaning liquid supply means 69.
In this cleaning liquid supply means 69, as shown in FIG. 2, a dry bulb temperature measuring resistor is used as a cleaning nozzle 70 so that the entire dry bulb temperature measuring resistor 58 and wet bulb temperature measuring resistor 59 can be cleaned. A pipe-shaped dry bulb temperature measuring cleaning nozzle 71 having the same length following the dry bulb temperature measuring resistor 58 and in the vicinity of the wet bulb temperature measuring resistor 59 as shown in FIG. And a pipe-shaped wet bulb temperature measuring cleaning nozzle 72 having the same length as that of the wet bulb temperature measuring resistor 59 is provided.
As shown in FIG. 2, the dry bulb temperature measuring and cleaning nozzle 71 has a plurality of dry bulb temperature measuring jets 73 formed toward the dry bulb temperature measuring resistor 58, and the dry bulb temperature measurement of the cleaning liquid. An introductory pipe 74 is connected.
As shown in FIG. 3, the wet bulb temperature measurement cleaning nozzle 72 is formed with a plurality of wet bulb temperature measurement jets 75 toward the wet bulb temperature measurement resistor 59, and the wet bulb measurement of the cleaning liquid. A warm introduction pipe 76 is connected.

As shown in FIG. 1, the dry bulb temperature measuring introduction tube 74 and the wet bulb temperature measuring introduction tube 76 are gathered at a tube collecting portion 77. A cleaning liquid supply pipe 79 connected to a cleaning liquid container 78 for storing a cleaning liquid (for example, pure water) is connected to the pipe collecting portion 77.
The cleaning liquid supply pipe 79 is provided with an opening / closing valve 80 and a liquid amount adjusting electromagnetic valve 81 in order from the cleaning liquid container 78 side. The opening / closing valve 80 opens and closes the cleaning liquid supply pipe 79. The liquid amount adjusting electromagnetic valve 81 is driven and controlled so as to communicate with the control means 67 and adjust the supply amount of the cleaning liquid flowing through the cleaning liquid supply pipe 79.

In this embodiment, the control means 67 includes at least a salt spray control unit 67A, a drying control unit 67B, and a wetting control unit 67C, and sequentially repeats a salt spray test, a drying test, and a wet test in the test chamber 9. Execute the cyclic corrosion test of the test piece.
The control unit 67 includes a cleaning control unit 67D, and the cleaning liquid supply unit 69 of the resistance temperature detector cleaning device 68 is connected to the dry bulb temperature measuring cleaning nozzle 71 and the wet before or after the salt spray test. The cleaning liquid is ejected from the bulb temperature measuring cleaning nozzle 72 to clean the dry bulb temperature measuring resistor 58 and the wet bulb temperature measuring resistor 59, that is, the dry bulb temperature measuring resistor 58 and the wet bulb temperature measuring resistor 59. Control is performed to prevent deposits and to remove lost substances such as dust attached to the dry bulb resistance thermometer 58 and the wet bulb resistance thermometer 59.

As described above, the dry bulb temperature measuring resistor 58 and the wet bulb temperature measuring resistor 59 as the temperature measuring resistor 57 must be cleaned for the following reason.
For example, when shifting from a salt spray test (35 ° C.) to a dry test (60 ° C., 25% rh ± 5% rh) and a wet test (50 ° C., 95% or more), the following conditions are obtained.
(1) Salt water adheres under salt spray conditions (state).
(2) The salt solution becomes salt crystals as the next drying condition is shifted.
(3) The salt in the form of crystals absorbs moisture from the air because the test chamber air [S3] is highly humid when wet.
(4) Under the above drying conditions, moisture evaporates from the salt solution in the process of generating salt crystals, so that the temperature of the resistance thermometer decreases below the ambient temperature due to latent heat of evaporation.
(5) In the above-described wet test, the salt crystals absorb moisture in the air, whereby condensation latent heat is generated, and the temperature of the resistance temperature detector rises above the air temperature in the test tank.
(6) This can be expressed by the following formula.
Q = α * F * ΔT ………… Formula (a)
w * C = α * F * (t1-t2) ............ Formula (b)
From the above formula (a) and formula (b),
t1 = w * C / α * F + t2
here,
Q: Calorific value (Kw)
α: Heat transfer coefficient of air (Kw / m2 K)
F: Area of resistance temperature detector to which salt crystals are attached (m2)
ΔT: Temperature difference (K)
w: Amount of water absorbed and condensed by the salt crystals (corresponding to the amount of evaporation of water contained in the salt crystals) (Kg / S)
C: Water evaporation (condensation) latent heat (KJ / Kg)
t1: Temperature of the resistance temperature detector (° C)
t2: Temperature in the test chamber (dry bulb temperature) (° C)
It is.
(7) Therefore, when the salt crystal adheres to the resistance temperature detector, the temperature (t1) of the resistance temperature detector is displayed higher than the temperature of the test tank, and the resistance temperature of the salt crystal The temperature difference due to adhesion to the body is larger in the dry bulb resistance thermometer than in the wet bulb resistance thermometer.

Next, the operation of the first embodiment will be described based on the flowchart of FIG.
As shown in FIG. 4, when the program of the control means 67 in the control panel 66 is started (step A01), the combined cycle test machine 1 is driven, and as a cycle corrosion test, first, salt water spray conditions are satisfied, The salt spray test is performed by driving the spray means 15 (step A02). At this time, the salt solution adheres to the dry bulb temperature measuring resistor 58 and the wet bulb temperature measuring resistor 59.
Therefore, for example, after the salt spray test is completed, the resistance thermometer cleaning device 67 is driven, and the dry bulb thermometer cleaning nozzle 71 and the wet bulb thermometer cleaning nozzle 72 are connected to the dry bulb thermometer resistor 58 and the wet bulb. The cleaning liquid is jetted toward the bulb temperature measuring resistor 59 to remove the salt solution and dust adhering to the dry bulb temperature measuring resistor 58 and the wet bulb temperature measuring resistor 59 (step A03).
Thereby, when it transfers to the next dry test or the wet test following a dry test, salt does not adhere to the dry bulb thermometer resistor 58 and the wet bulb thermometer resistor 59 as crystals, Therefore, the temperature measurement of the dry bulb resistance thermometer 58 and the wet bulb resistance bulb 59 becomes accurate, and the atmosphere relative humidity in the test tank 2 and the dry bulb resistance bulb 58 and the wet bulb resistance bulb 59 are used. There is no difference from the measured humidity value obtained by substituting into the calculation formula of the Japanese Industrial Standard based on the measured temperature value, and the time to reach the constant value of temperature and humidity is not different from the actual one.
Next, when the drying condition is satisfied, the drying means 50 is driven to perform a drying test (step A04). When the wetting condition is satisfied, the wetting means 52 is driven to perform the wetting test. After that, the program is returned (step A06), and the salt spray test, the drying test, and the wet test are sequentially repeated to reproduce the natural environment and perform the corrosion test of the test piece P.

  In the flowchart of FIG. 4, in order to increase the number of washings of the dry bulb resistance thermometer 58 and the wet bulb thermometer resistor 59, the temperature measurement is performed not only after the salt spray test but also after the dry test. The resistor cleaning device 68 can be driven to eject the cleaning liquid (step B01), or after the wet test, the temperature measuring resistor cleaning device 68 can be driven to eject the cleaning liquid (step B02). Thereby, the salt solution and dust adhering to the dry bulb thermometer resistor 58 and the wet bulb thermometer resistor 59 can be more efficiently removed.

Although the embodiments of the present invention have been described above, the configuration of the above-described embodiments will be described for each claim.
According to the first aspect of the present invention, the RTD cleaning device 68 is supplied with the cleaning liquid so that the cleaning liquid is ejected from the cleaning nozzle 70 and the cleaning liquid supply means 69 having the cleaning nozzle 70 for jetting the cleaning liquid to the RTD 57. The control unit 67 is configured to drive and control the unit 69.
Thus, in the combined cycle tester 1 as a corrosion tester that performs a cycle corrosion test of a test piece in a cycle, an accurate temperature / humidity measurement value is obtained by automatically washing the resistance temperature detector 57. As a result, the time for the temperature and humidity to reach a certain value is shortened, the transition to the next test is facilitated within the transition time defined in the Japanese Industrial Standard, and the corrosion state in nature Reproducibility can be increased. In addition, since a separate heater is not required, costs can be reduced.
In the invention according to claim 2, the dry bulb temperature measuring cleaning nozzle 71 and the wet bulb temperature measuring cleaning nozzle 72 as the cleaning nozzle 70 follow the dry bulb temperature measuring resistor 58 and the wet bulb temperature measuring resistor 59. In addition, the same length as the dry bulb resistance thermometer 58 and the wet bulb resistance thermometer 59 is provided.
As a result, the entire dry bulb resistance thermometer 58 and wet bulb resistance thermometer 59 can be cleaned, and the measured values of the dry bulb resistance thermometer 58 and the wet bulb resistance thermometer 59 are more accurate. it can.

FIG. 5 shows Embodiment 2 of the present invention.
In the following embodiments, the same functions as those in the first embodiment described above will be described with the same reference numerals omitted.
The features of the second embodiment are as follows. That is, the cleaning nozzle 82 is formed with a cleaning liquid jet port 84 having a tapered surface 83 tapered by a diameter D2 on the outer peripheral surface side smaller than the diameter D1 on the inner peripheral surface side.
As a result, when the cleaning liquid in the cleaning nozzle 82 is ejected from the cleaning liquid jet outlet 84, the tapered taper surface 83 increases the jetting speed and strength of the cleaning liquid, and the temperature measuring resistor 57 can be efficiently cleaned. .

FIG. 6 shows Embodiment 3 of the present invention.
The features of the third embodiment are as follows. That is, an upper cleaning nozzle 85 for cleaning the upper portion of the resistance temperature detector 57 and a lower portion of the resistance temperature detector 57 are disposed around the one resistance temperature detector 57 so as not to harm the measurement of the resistance temperature detector 57. Two cleaning nozzles are disposed, including a lower cleaning nozzle 86 for cleaning. The upper cleaning nozzle 85 is provided with an upper outlet 87 that is disposed above the resistance temperature detector 57 and that jets the cleaning liquid toward the upper portion of the resistance temperature detector 57. The lower cleaning nozzle 86 is disposed on the side of the lower portion of the resistance temperature detector 57, and a lower ejection port 88 that ejects the cleaning liquid toward the lower portion of the resistance temperature detector 57 is formed.
Thereby, since the resistance thermometer 57 is wash | cleaned by the upper part and the lower part, it can make a measurement precision higher.

  The resistance temperature detector cleaning device according to the present invention can be applied to other corrosion testers such as a salt spray tester and a gas corrosion tester.

DESCRIPTION OF SYMBOLS 1 Combined cycle tester illustrated as a corrosion tester 2 Test tank 5 Cylinder 7 Partition member 8 Equipment space 9 Test room 15 Salt spray means 16 Salt water container 18 Spray cylinder 19 Salt spray nozzle 20 Compressed air nozzle 50 Drying means 52 Wet Means 57 RTD 58 Dry bulb RTD 59 Wet bulb RTD 61 Dry bulb temperature detector 63 Wet bulb temperature detector 66 Control panel 67 Control means 68 RTD cleaning device 69 Cleaning liquid supply means 70 Cleaning nozzle 71 Cleaning bulb for dry bulb temperature measurement 72 Cleaning nozzle for wet bulb temperature measurement 73 Drying bulb for temperature measurement of dry bulb 75 Outlet for temperature measurement of wet bulb 78 Cleaning fluid container 80 Opening and closing valve 81 Electromagnetic for liquid volume adjustment valve

Claims (2)

  In a corrosion tester for performing a cycle corrosion test of a test piece, a resistance thermometer cleaning device for a corrosion tester for cleaning a resistance thermometer for measuring temperature is provided in a test tank of the tester, and the resistance thermometer What is claimed is: 1. A resistance temperature detector cleaning device comprising: a cleaning liquid supply means having a cleaning nozzle for ejecting a cleaning liquid to a body; and a control means for drivingly controlling the cleaning liquid supply means so as to eject the cleaning liquid from the cleaning nozzle. Corrosion testing machine provided.   The corrosion provided with the resistance temperature detector cleaning device according to claim 1, wherein the cleaning nozzle is disposed following the resistance temperature detector and has the same length as the resistance temperature detector. testing machine.

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