CN111693448B - Automatic water supplementing washing air supply system and operation method - Google Patents
Automatic water supplementing washing air supply system and operation method Download PDFInfo
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- CN111693448B CN111693448B CN202010550361.9A CN202010550361A CN111693448B CN 111693448 B CN111693448 B CN 111693448B CN 202010550361 A CN202010550361 A CN 202010550361A CN 111693448 B CN111693448 B CN 111693448B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 207
- 230000001502 supplementing effect Effects 0.000 title claims abstract description 59
- 238000005406 washing Methods 0.000 title claims abstract description 21
- 238000000034 method Methods 0.000 title claims abstract description 20
- 239000007788 liquid Substances 0.000 claims abstract description 129
- 238000012360 testing method Methods 0.000 claims abstract description 36
- 239000007921 spray Substances 0.000 claims abstract description 28
- 239000012267 brine Substances 0.000 claims abstract description 9
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 claims abstract description 9
- 150000003839 salts Chemical class 0.000 claims description 24
- 230000001105 regulatory effect Effects 0.000 claims description 18
- 238000010438 heat treatment Methods 0.000 claims description 15
- 230000009471 action Effects 0.000 claims description 9
- 239000003595 mist Substances 0.000 claims description 4
- 230000008569 process Effects 0.000 abstract description 9
- 238000005507 spraying Methods 0.000 description 11
- 238000005260 corrosion Methods 0.000 description 8
- 239000013589 supplement Substances 0.000 description 8
- 230000007797 corrosion Effects 0.000 description 7
- 238000004891 communication Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 230000006378 damage Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000001960 triggered effect Effects 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 238000000889 atomisation Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 238000009692 water atomization Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N17/00—Investigating resistance of materials to the weather, to corrosion, or to light
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Abstract
The invention discloses a water-washing air supply system capable of automatically supplementing water and an operation method thereof, which mainly comprise a spray nozzle, a main saturator, an auxiliary saturator, a water supplementing tank and a control system; the spray nozzle is communicated with the top of the main saturator, the test box and the brine tank; compressed gas is introduced into a main saturator; the main saturator is communicated with the auxiliary saturator through a pipeline; a pipeline which is communicated with the tops of the main saturator and the auxiliary saturator is provided with a first electromagnetic valve; a pipeline communicated with the bottoms of the main saturator and the auxiliary saturator is provided with a second electromagnetic valve; the water supplementing tank is positioned above the auxiliary saturator; the auxiliary saturator is provided with a third delay control valve, a fourth pressure relief valve, a high water level liquid level switch and a low water level liquid level switch; the control system can receive a difference signal of the liquid level where the high water level liquid level switch and the low water level liquid level switch are positioned and control the switch of the first electromagnetic valve, the second electromagnetic valve, the third delay control valve and the fourth pressure relief valve; the invention has smart structure, can ensure the continuity and the accuracy of the test process, has low cost and is suitable for popularization.
Description
Technical Field
The invention relates to the technical field of salt spray corrosion tests, in particular to an automatic water supplementing water washing air supply system and an operation method.
Background
The salt spray corrosion test box is mainly characterized in that salt spray is atomized by using configured salt water, and then the atomized salt spray is attached to the surface of a sample to perform corrosion test on the sample. In the salt water atomization process, compressed air is needed to be used, and in order to ensure the cleanness of the compressed air, the compressed air is required to be washed firstly to remove greasy dirt in the compressed air; the compressed air washing needs to rely on an air saturator; the air saturator is internally provided with pure water and a heater, the heater heats the compressed air passing through, the pure water washes the compressed air, and the heated and washed compressed air reaches the nozzle with water of the saturator; pressure resistance and corrosion resistance are required based on the saturator; because the saturator is in a working state, water is taken away, so that the water in the saturator is less and less, and the saturator needs to be replenished after a period of time; otherwise, the heater in the saturator is dry-burned, the self structure is damaged or power-off protection is induced, and the test is influenced; therefore, the saturator needs to be periodically replenished with water during the test.
The water supplementing mode of the general saturator is manual regular water supplementing, and because the spraying has pressure and the pressure is also in the saturator, in order to ensure that auxiliary equipment is not damaged and the safety of operators is protected in the water supplementing process, the spraying must be stopped before water supplementing, and the pressure in the saturator is released; the spraying in the test box is interrupted during the period of water supplementing, which brings trouble to staff and influences the continuity of the test.
In the patent with publication number CN104990861a, an electromagnetic pump is used to automatically replenish water, and the following defects exist in the actual application process of this water replenishing mode:
(1) The use of an anti-corrosion pump is required to be added, and the wall thickness and the compressive capacity of the saturator are increased, so that the cost of the whole test box is greatly increased;
(2) The pump possibly causes air to be brought into during the pumping process to influence the test result of the test box;
(3) The pressure of spraying can be directly influenced, so that the spraying fluctuation is caused, and the accuracy of the test is influenced;
In general, the two types of water can not well meet the use of a salt spray corrosion test box.
Disclosure of Invention
The main technical problems to be solved by the invention are as follows: the water washing air supply system capable of automatically supplementing water and the operation method thereof can not only automatically supplement water without affecting test continuity, but also control cost and ensure accuracy of test results.
The following technical scheme is adopted to solve the main technical problems:
An automatic water-replenishing water-washing air supply system comprises a spray nozzle, a main saturator, an auxiliary saturator, a water replenishing tank and a control system; the spray nozzle is a pneumatic spray nozzle and is respectively communicated with the top of the main saturator, the test box and the brine tank; compressed gas is introduced into the bottom of the main saturator; a heating element is arranged at the bottom of the main saturator; the main saturator and the auxiliary saturator are transversely arranged and are communicated through two pipelines which are distributed up and down; a pipeline for communicating the top of the main saturator and the top of the auxiliary saturator is provided with a first electromagnetic valve; a pipeline which is communicated with the bottom of the main saturator and the bottom of the auxiliary saturator is provided with a second electromagnetic valve; the water supplementing tank is positioned above the auxiliary saturator, and a third delay control valve is arranged between the water supplementing tank and the auxiliary saturator; the auxiliary saturator box is also provided with a fourth pressure relief valve, a high water level liquid level switch and a low water level liquid level switch; the control system can receive a difference signal of the liquid level where the high water level liquid level switch and the low water level liquid level switch are located and control the switch of the first electromagnetic valve, the second electromagnetic valve, the third delay control valve and the fourth pressure relief valve.
Preferably, the primary saturator and the secondary saturator are uniform in size; the distance from the liquid level in the main saturator to the top surface is greater than or equal to one fourth of the height of the main saturator.
Preferably, the compressed gas is delivered via a compressor; the pipeline between the compressor and the main saturator is provided with a first pressure regulating valve and a fifth electromagnetic valve.
Preferably, the compressed gas is communicated with the main saturator through a pressure split pipeline; the pressure shunt pipeline is positioned at the bottom of the main saturator; the periphery of the pressure shunt pipeline is provided with a plurality of air holes.
Preferably, the line between the atomizing nozzle and the main saturator is provided with a second pressure regulating valve.
Preferably, the main saturator is further provided with a temperature sensor and a low level protection switch.
Preferably, at least two liquid level meters are arranged outside the auxiliary saturator; one of the liquid level gauges is positioned at the top of the secondary saturator, and the other is positioned at the bottom of the secondary saturator.
Preferably, the delay time of the third delay control valve is greater than or equal to the pressure release time of the fourth pressure release valve.
An operation method of an automatic water supplementing water washing air supply system comprises the following steps:
S1: the compressed gas is conveyed by a compressor, the pressure of the compressed gas is regulated to 0.3MPa by a first pressure regulating valve and then enters a pressure diversion pipeline, the pressure diversion pipeline diverts the compressed air into a plurality of small bubbles, and the small bubbles are conveyed into a main saturator for washing;
s2: the heating element heats the liquid and the compressed gas in the main saturator; the compressed gas after washing and heating brings a part of water vapor to the atomizing nozzle after pressure regulation by the second pressure regulating valve; the atomizing nozzle sucks salt water from the salt water tank by utilizing a siphon principle and sprays salt mist into the test tank under the action of compressed gas;
S3: the liquid level of the main saturator and the liquid level of the auxiliary saturator are reduced to be lower than a high-water-level liquid level switch, the high-water-level liquid level switch transmits signals to a control system, and the control system enters a compensation standby stage;
S4: when the liquid level of the main saturator and the auxiliary saturator continuously drops to be lower than the low water level liquid level switch, the low water level liquid level switch transmits a signal to a control system, and the control system sends out an instruction to enter a water supplementing stage; closing the first electromagnetic valve and the second electromagnetic valve, disconnecting the main saturator from the auxiliary saturator, and keeping the main saturator in a working state at the moment; opening a fourth pressure release valve to release pressure of the auxiliary saturator, and simultaneously enabling a third delay control valve to enter into opening countdown; when the pressure of the auxiliary saturator is released to be consistent with the atmospheric pressure, the third delay control valve is opened, and pure water of the water supplementing tank enters the auxiliary saturator;
S5: when the liquid level of the auxiliary saturator sequentially exceeds the low water level liquid level switch and the high water level liquid level switch, the control system sends out an instruction, and the fourth pressure relief valve and the third delay control valve are closed, so that the auxiliary saturator is disconnected from the water supplementing tank and the outside; opening the first electromagnetic valve and the second electromagnetic valve to enable the main saturator to be communicated with the auxiliary saturator; under the action of the pressure of the main saturator, the liquid in the auxiliary saturator is pressed into the main saturator until the liquid levels of the main saturator and the auxiliary saturator are equal; at this time, the liquid level of the auxiliary saturator is positioned between the high water level liquid level switch and the low water level liquid level switch, and the control system receives the signal of the high water level liquid level switch and enters the compensation standby stage.
Compared with the prior art, the salt spray corrosion test box has the following advantages that:
(1) The method comprises the steps of designing a main saturator and an auxiliary saturator, wherein the top and the bottom of the main saturator and the bottom of the auxiliary saturator are communicated through pipelines, a first electromagnetic valve is arranged on the pipeline positioned at the top of the main saturator and the pipeline positioned at the bottom of the main saturator and the bottom of the auxiliary saturator, and a second electromagnetic valve is arranged on the pipeline positioned at the bottom of the main saturator and the bottom of the auxiliary saturator; the primary saturator and the secondary saturator can be disconnected by simultaneously closing the first electromagnetic valve and the second electromagnetic valve; the communication between the main saturator and the auxiliary saturator can be realized by simultaneously opening the first electromagnetic valve and the second electromagnetic valve; when water is replenished, the main saturator and the auxiliary saturator are disconnected, the main saturator normally performs water washing and spraying, and the auxiliary saturator is responsible for replenishing water; after the auxiliary saturator is filled with water, the first electromagnetic valve and the second electromagnetic valve are opened, and the first electromagnetic valve and the second electromagnetic valve are communicated with the main saturator to fill water, so that the continuity of experimental spraying and the integrity of the experiment are guaranteed, the structure is ingenious, the cost is low, and the auxiliary saturator is suitable for popularization.
(2) In the water supplementing stage, the auxiliary saturator is firstly depressurized, so that the excessive pressure of the auxiliary saturator is avoided, and the water supplementing tank and the third delay control valve are prevented from being damaged; in addition, the pressure is completely released and then communicated with the outside, so that personal injury to operators is avoided.
(3) The distance from the liquid level in the main saturator to the top surface of the main saturator is more than or equal to one fourth of the height of the main saturator; avoid because main saturator water level is too high, when compressed gas goes out from main saturator export, compressed gas can be the liquid and take the nozzle spraying to the linearity, causes atomizing steam mostly to be the steam in the middle of the main saturator, and the salt water consumption in the middle of the salt water tank is little or not consumed, leads to the test result of test box inaccurate or inefficacy.
(4) The water supplementing is triggered by double linkage of the high water level liquid level switch and the low water level liquid level switch, so that the aim of incapable water supplementing is fulfilled due to fluctuation of liquid when the single liquid level switch is used, and the single liquid level switch is damaged due to frequent electrical suction; the structure is ingenious, the cost is low, and meanwhile, the water supplementing operation is stable and reliable.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some examples of the present invention, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of an overall structure according to an embodiment of the present invention.
In the figure: 1 is a spray nozzle, 2 is a main saturator, 3 is a secondary saturator, 4 is a water supplementing tank, 5 is a heating element, 6 is a first electromagnetic valve, 7 is a second electromagnetic valve, 8 is a third delay control valve, 9 is a fourth pressure relief valve, 10 is a fifth electromagnetic valve, 11 is a high water level liquid level switch, 12 is a low water level liquid level switch, 13 is a compressor, 14 is a first pressure regulating valve, 15 is a second pressure regulating valve, 16 is a temperature sensor, 17 is a low liquid level protection switch, 18 is a pressure diversion pipeline, 19 is a liquid level meter, 20-1 is a high liquid level, 20-2 is a medium liquid level, 20-3 is a low liquid level, and 21 is a brine tank.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention. In addition, all connection relationships mentioned herein do not refer to direct connection of the components, but rather, refer to a more optimal connection structure that may be formed by adding or subtracting connection aids depending on the particular implementation.
Referring to fig. 1, an automatic water-replenishing water-washing air supply system comprises a spray nozzle 1, a main saturator 2, an auxiliary saturator 3, a water replenishing tank 4 and a control system; the spray nozzle 1 is a pneumatic atomization nozzle and is respectively communicated with the test box, the brine tank 21 and the top of the main saturator 2; the brine tank 21 communicates the brine with the spray nozzle 1 through a siphon principle, and changes the brine into salt mist to be sprayed into the sample surface in the test box (the specific position of the test box is marked in the figure) under the driving action of compressed gas; the salt water is corrosive, and the spray nozzle 1 adopts a special glass nozzle; the compressed gas is a gas source of a pneumatic atomizing nozzle, and in the salt spray corrosion test, the compressed gas can be directly pressurized by adopting air through a compressor 13 and is delivered to the bottom of the main saturator 2 after being regulated to 0.3MPa by a first pressure regulating valve 14; of course, in order to facilitate the start-stop control of the compressed gas, a fifth electromagnetic valve 10 is also arranged on the pipeline between the outlet of the compressor 13 and the main saturator 2; in order to ensure that the compressed gas can be uniformly distributed in the main saturator 2, a pressure diversion pipeline 18 is arranged in the main saturator 2, and a plurality of air holes are formed in the peripheral surface of the pressure diversion pipeline 18; compressed air fed by the compressor 13 enters the pressure split pipeline 18 before entering the main saturator 2.
The main saturator 2 is internally provided with water for cleaning the greasy dirt of the compressed air, the bottom of the main saturator 2 is provided with a heating element 5, the heating element 5 can adopt electric heating or other heating modes, the heating element 5 can be arranged according to the prior art, and the water temperature in the main saturator 2 is kept between 42 ℃ and 55 ℃ according to the test requirement; after being heated and washed, the compressed gas reaches the top of the main saturator 2 with a part of water vapor and finally reaches the spray nozzle 1; the pressure of the spray is 0.07-0.17MPa to normally atomize the brine, and the pressure in the main saturator 2 is 0.3MPa, so a second pressure regulating valve 15 is provided in the line connecting the main saturator 2 and the spray nozzle 1.
The main saturator 2 and the auxiliary saturator 3 are completely consistent, and are made into cylinders by adopting SUS304 stainless steel with the thickness of 2.0mm, and the normal pressure resistance is 1.0MPa; the main saturator 2 and the auxiliary saturator 3 are adjacently arranged side by side, the top and the bottom of the main saturator 2 and the bottom of the auxiliary saturator 3 are respectively communicated by pipelines, a first electromagnetic valve 6 is arranged between the pipelines positioned at the top of the main saturator 2 and the top of the auxiliary saturator 3, and a second electromagnetic valve 7 is arranged between the pipelines positioned at the bottom of the main saturator 2 and the auxiliary saturator 3; the first electromagnetic valve 6 and the second electromagnetic valve 7 are simultaneously opened or simultaneously closed, and under the action of two pipelines which are communicated up and down, the pressure and the liquid level height in the main saturator 2 and the auxiliary saturator 3 are completely consistent; the primary saturator 2 and the secondary saturator 3 can be disconnected by simultaneous closing of the first solenoid valve 6 and the second solenoid valve 7; communication between the primary saturator 2 and the secondary saturator 3 can be achieved by simultaneous opening of the first solenoid valve 6 and the second solenoid valve 7; because the compressed gas takes away a part of water, the water level in the main saturator 2 is reduced, and automatic water supplementing is needed in the main saturator 2; when water is needed to be replenished, the communication between the main saturator 2 and the auxiliary saturator 3 is disconnected, namely the first electromagnetic valve 6 and the second electromagnetic valve 7 are closed to replenish water to the auxiliary saturator 3, and at the moment, the main saturator 2 can continuously complete the water washing process of the compressed air, so that the continuity of spraying and the continuity of a test are ensured; after the water supplementing of the auxiliary saturator 3 is completed, the auxiliary saturator 3 is disconnected from the outside, the auxiliary saturator 3 is communicated with the main saturator 2, namely the first electromagnetic valve 6 and the second electromagnetic valve 7 are opened, and the main saturator 2 and the auxiliary saturator 3 reach liquid level balance and pressure balance under the pressure effect of the main saturator 2.
A water supplementing tank 4 is arranged above the auxiliary saturator 3, deionized water is adopted in the water supplementing tank 4 in order to avoid scale generation in the main saturator 2 and the auxiliary saturator 3, the water supplementing tank 4 is communicated with an external water source, and the water supplementing tank 4 is at normal pressure; the water supplementing tank 4 is communicated with the auxiliary saturator 3 through a pipeline, a third delay control valve 8 is arranged on the pipeline, and the third delay control valve 8 is a delay switch, namely, the third delay control valve is opened after a period of time is delayed after an instruction is sent out; in order to ensure the water supplementing safety of the auxiliary saturator 3, the top of the auxiliary saturator 3 is also provided with a fourth pressure relief valve 9, namely the auxiliary saturator 3 is subjected to pressure relief before water supplementing; when the pressure of the auxiliary saturator 3 is reduced to be equal to the atmospheric pressure, the liquid in the water supplementing tank 4 supplements water to the auxiliary saturator 3 according to the gravity of the liquid.
The control system controls the whole water supplementing operation and comprises a water supplementing standby stage and a water supplementing stage; the signal sources of the control system are mainly a high water level liquid level switch 11 and a low water level liquid level switch 12; the high water level switch 11 and the low water level switch 12 are distributed in a high-low mode and are both positioned at the upper part of the auxiliary saturator 3; the liquid level of the high water level liquid level switch 11 is high liquid level 20-1, and the liquid level of the low water level liquid level switch 12 is low liquid level 20-3; when the liquid level is lower than the height of the high water level switch 11, the high water level switch 11 transmits a signal to the control system, and the control system enters a water supplementing standby stage, so that the existing water supplementing operation still does not have any action; when the liquid level is lower than the level of the low water level switch 12, the low water level switch 12 transmits a signal to the control system, and the control system sends a command of a water supplementing stage, namely, the first electromagnetic valve 6 and the second electromagnetic valve 7 are closed, the connection between the auxiliary saturator 3 and the main saturator 2 is disconnected, and at the moment, the main saturator 2 still keeps normal washing of compressed gas and normal working of the spray nozzle 1; simultaneously, a fourth pressure release valve 9 and a third delay control valve 8 are opened, at the moment, the fourth pressure release valve 9 immediately starts to release pressure, the third delay control valve 8 is opened in a countdown mode, in order to ensure that water in the water supplementing tank 4 can be smoothly supplemented into the auxiliary saturator 3, the pressure release time of the fourth pressure release valve 9 is smaller than or equal to the time delay time of the third delay control valve 8, and the best state is that the pressure release of the fourth pressure release valve 9 is just completed, and the third delay control valve 8 is just opened; after the third delay control valve 8 is opened, the liquid in the water supplementing tank 4 is supplemented into the auxiliary saturator 3; at the moment, the liquid is gradually higher than a low water level liquid level switch 12 and a high water level liquid level switch 11, signals are transmitted to a control system by the two liquid level switches, the control system closes a third delay control valve 8 and a fourth pressure relief valve 9, and the auxiliary saturator 3 is disconnected from the outside; after the third delay control valve 8 and the fourth pressure relief valve 9 are completely closed, the first electromagnetic valve 6 and the second electromagnetic valve 7 are opened to communicate the main saturator 2 with the auxiliary saturator 3, because the internal pressure of the auxiliary saturator 3 is atmospheric pressure, after the main saturator 2 and the auxiliary saturator 3 are communicated, under the pressure effect in the main saturator 2, the liquid in the auxiliary saturator 3 is respectively pressed to the main saturator 2 until the liquid level and the pressure between the two are kept balanced, and the liquid level at the moment is the medium liquid level 20-2; when the auxiliary saturator 3 supplements water to the inside of the main saturator 2, the liquid level of the auxiliary saturator 3 is positioned between the high water level liquid level switch 11 and the low water level liquid level switch 12, and the control system enters a water supplementing standby stage again; in the water supplementing stage, the main saturator 2 is still in a normal working state, namely, when water is automatically supplemented, the water washing of compressed air is not performed, the normal spraying of the spraying nozzle 1 is not influenced, and the continuity of the whole test is not influenced.
The high water level liquid level switch 11 and the low water level liquid level switch 12 are the suction and separation states of the liquid level switch caused by the descending or ascending process of the liquid level, so that a circuit is formed; a liquid level switch can be arranged in theory to supplement water, but the method has the following defects under the actual condition: the main saturator 2 is always provided with compressed gas flowing through, the main saturator 2 is communicated with the auxiliary saturator 3, the liquid surfaces of the main saturator 2 and the auxiliary saturator 3 are always in a fluctuation state, and when the liquid surfaces are in a critical state of suction of the main saturator 2 and the auxiliary saturator 3; then the high water level switch 11 or the low water level switch 12 is frequently sucked and disconnected, and the water supplementing purpose cannot be achieved at all in the state, but the damage is caused by the frequent electric suction; when the water level of the main saturator 2 is at a high liquid level, the two liquid level switches are all separated by utilizing the height difference of the high water level switch 11 and the low water level switch 12, and a system circuit is in an off state; when the water level drops and the high water level switch 11 is closed, the control system enters a water replenishing standby stage, but water replenishing is not performed at this time, so that the fluctuation at the high liquid level 20-1 does not influence the system. Then the water level continues to drop, the low water level switch 12 is immediately triggered to enter the water supplementing stage after being sucked, and even if the low liquid level 20-3 still fluctuates at the moment, the fluctuation does not influence the water supplementing; the structure is ingenious and the cost is low.
In order to ensure the accuracy of the test process, the distance from the liquid level in the main saturator 2 to the top surface of the main saturator 2 is more than or equal to one fourth of the height of the main saturator 2; because if the water level in the main saturator 2 is too high, the compressed gas will carry the water linearly to the spray nozzle as it exits the main saturator 2, this results in the atomized water vapor being mostly water vapor in the main saturator 2, and little or no salt water in the salt water tank 21 is consumed, thus leading to test failure of the test chamber.
In order to ensure the stability of the liquid temperature of the main saturator 2, a temperature sensor 16 is arranged in the middle of the main saturator 2, and the control system can receive the signals of the temperature sensor 16 and make corresponding heating adjustment to the heating element 5; in order to avoid extreme conditions such as empty burning of the heater caused by too low liquid in the main saturator 2, a low liquid level protection switch 17 is also arranged at the bottom of the main saturator 2; at least two liquid level meters 19 are arranged outside the auxiliary saturator 3, one liquid level meter 19 is positioned at the top of the auxiliary saturator 3, the other liquid level meter 19 is positioned at the bottom of the auxiliary saturator 3, and visual reading can be realized by the liquid level meters 19.
Notably, are: the distance between the high liquid level 20-1 and the low liquid level 20-3 determines the amount of water supplement and the time of water supplement, and the longer the distance is, the longer the time of water supplement is, the shorter the distance is, and the shorter the time of water supplement is; the temperature of the saturator is required to be kept stable in the test; because the water stored in the water supplementing tank 4 is in a normal temperature state, and the water temperature in the main saturator 2 needs to be kept at 42-55 ℃, the water in the normal temperature state and the water temperature in the auxiliary saturator 3 in the constant temperature state have a certain difference, when water supplementing is started, the newly supplemented water can cause the temperature in the main saturator 2 to drop, so that the temperature in a laboratory fluctuates; therefore, the amount of the water is preferably not to cause temperature fluctuation in the laboratory; the diameter of the main saturator 2 of the system is 18-22cm, the height is 30-40cm, on the basis of the size, the distance between the high liquid level 20-1 and the low liquid level 20-3 is 3-6cm, and the sizes of the main saturator 2 and the auxiliary saturator 3 are limited by the size of a test box, so that the design is not easy to be oversized.
The working process of the water washing method comprises the following steps: the compressed gas is conveyed by a compressor 13, the pressure of the compressed gas is regulated to 0.3MPa by a first pressure regulating valve 14 and then enters a pressure diversion pipeline 18, the pressure diversion pipeline 18 diverts the compressed air into a plurality of small bubbles, and the small bubbles are conveyed into a main saturator 2 for water washing; the heating element 5 heats the liquid and the compressed gas in the main saturator 2; the compressed gas after washing and heating brings a part of water vapor to the atomizing nozzle after pressure regulation by the second pressure regulating valve 15; the atomizing nozzle sucks in salt water from the salt water tank 21 by means of a siphon principle and sprays salt mist into the test chamber under the action of compressed gas.
The working process of the invention is as follows: the liquid level of the main saturator 2 and the liquid level of the auxiliary saturator 3 are reduced to be lower than a high water level liquid level switch 11, the high water level liquid level switch 11 transmits signals to a control system, and the control system enters a water supplementing standby stage; when the liquid level of the main saturator 2 and the auxiliary saturator 3 continuously drops to be lower than the low water level switch 12, the low water level switch 12 transmits signals to a control system, and the control system sends out instructions to enter a water supplementing stage; closing the first electromagnetic valve 6 and the second electromagnetic valve 7, disconnecting the main saturator 2 from the auxiliary saturator 3, wherein the main saturator 2 is still in a working state; opening a fourth pressure release valve 9 to release pressure to the auxiliary saturator 3, and simultaneously enabling a third delay control valve 8 to enter an opening countdown; when the pressure of the auxiliary saturator 3 is released to be consistent with the atmospheric pressure, the third delay control valve 8 is opened, and pure water in the water supplementing tank 4 enters the auxiliary saturator 3; when the liquid level of the auxiliary saturator 3 exceeds the low water level switch 12 and the high water level switch 11 in sequence, the control system sends out an instruction, and the fourth pressure release valve 9 and the third delay control valve 8 are closed, so that the auxiliary saturator 3 is disconnected with the water supplementing tank 4 and the outside; opening the first electromagnetic valve 6 and the second electromagnetic valve 7 to enable the main saturator 2 to be communicated with the auxiliary saturator 3; under the action of the pressure of the main saturator 2, the liquid in the auxiliary saturator 3 is pressed into the main saturator 2 until the liquid levels of the main saturator 2 and the auxiliary saturator 3 are equal; at this time, the liquid level of the auxiliary saturator 3 is located between the high water level switch 11 and the low water level switch 12, and the control system receives the signal of the high water level switch 11 and enters the water compensation standby stage.
It should be noted that, in the present application, "upper, lower, left, right, inner, and outer" are defined based on the relative positions of the components in the drawings, and only for the clarity and convenience of describing the technical solution, it should be understood that the application of the azimuth term does not limit the protection scope of the present application.
The foregoing embodiments are not intended to limit the present invention, but while the present invention has been described in detail with reference to the foregoing examples, it will be apparent to those skilled in the art that modifications may be made to the technical solutions described in the foregoing embodiments, or equivalents may be substituted for some of the technical features thereof, and any modifications, equivalents, improvements or changes that fall within the spirit and principle of the present invention should be included in the scope of protection of the present invention.
Claims (5)
1. An automatic water supply's washing air feed system, its characterized in that: comprises a spray nozzle, a main saturator, an auxiliary saturator, a water supplementing tank and a control system; the spray nozzle is a pneumatic spray nozzle and is respectively communicated with the top of the main saturator, the test box and the brine tank; compressed gas is introduced into the bottom of the main saturator; a heating element is arranged at the bottom of the main saturator; the main saturator and the auxiliary saturator are transversely arranged and are communicated through two pipelines which are distributed up and down; a pipeline for communicating the top of the main saturator and the top of the auxiliary saturator is provided with a first electromagnetic valve; a pipeline which is communicated with the bottom of the main saturator and the bottom of the auxiliary saturator is provided with a second electromagnetic valve; the water supplementing tank is positioned above the auxiliary saturator, and a third delay control valve is arranged between the water supplementing tank and the auxiliary saturator; the auxiliary saturator box is also provided with a fourth pressure relief valve, a high water level liquid level switch and a low water level liquid level switch; the control system can receive a difference signal of the liquid level where the high water level liquid level switch and the low water level liquid level switch are positioned and control the switch of the first electromagnetic valve, the second electromagnetic valve, the third delay control valve and the fourth pressure relief valve;
The compressed gas is communicated with the main saturator through a pressure shunt pipeline; the pressure shunt pipeline is positioned at the bottom of the main saturator; the periphery of the pressure diversion pipeline is provided with a plurality of air holes;
a second pressure regulating valve is arranged on a pipeline between the atomizing nozzle and the main saturator;
the main saturator is also provided with a temperature sensor and a low liquid level protection switch;
at least two liquid level meters are arranged outside the auxiliary saturator; one of the liquid level gauges is positioned at the top of the secondary saturator, and the other is positioned at the bottom of the secondary saturator.
2. An automatic water supply and air supply system according to claim 1, wherein: the primary saturator and the secondary saturator are identical in size; the distance from the liquid level in the main saturator to the top surface is greater than or equal to one fourth of the height of the main saturator.
3. An automatic water supply and air supply system according to claim 1, wherein: the compressed gas is delivered via a compressor; the pipeline between the compressor and the main saturator is provided with a first pressure regulating valve and a fifth electromagnetic valve.
4. An automatic water supply and air supply system according to claim 1, wherein: the delay time of the third delay control valve is greater than or equal to the pressure release time of the fourth pressure release valve.
5. A method of operating an automatic water replenishment water and air supply system in accordance with any one of claims 1 to 4 wherein: the method comprises the following steps:
S1: the compressed gas is conveyed by a compressor, the pressure of the compressed gas is regulated to 0.3MPa by a first pressure regulating valve and then enters a pressure diversion pipeline, the pressure diversion pipeline diverts the compressed air into a plurality of small bubbles, and the small bubbles are conveyed into a main saturator for washing;
s2: the heating element heats the liquid and the compressed gas in the main saturator; the compressed gas after washing and heating brings a part of water vapor to the atomizing nozzle after pressure regulation by the second pressure regulating valve; the atomizing nozzle sucks salt water from the salt water tank by utilizing a siphon principle and sprays salt mist into the test tank under the action of compressed gas;
S3: the liquid level of the main saturator and the liquid level of the auxiliary saturator are reduced to be lower than a high-water-level liquid level switch, the high-water-level liquid level switch transmits signals to a control system, and the control system enters a compensation standby stage;
S4: when the liquid level of the main saturator and the auxiliary saturator continuously drops to be lower than the low water level liquid level switch, the low water level liquid level switch transmits a signal to a control system, and the control system sends out an instruction to enter a water supplementing stage; closing the first electromagnetic valve and the second electromagnetic valve, disconnecting the main saturator from the auxiliary saturator, and keeping the main saturator in a working state at the moment; opening a fourth pressure release valve to release pressure of the auxiliary saturator, and simultaneously enabling a third delay control valve to enter into opening countdown; when the pressure of the auxiliary saturator is released to be consistent with the atmospheric pressure, the third delay control valve is opened, and pure water of the water supplementing tank enters the auxiliary saturator;
S5: when the liquid level of the auxiliary saturator sequentially exceeds the low water level liquid level switch and the high water level liquid level switch, the control system sends out an instruction, and the fourth pressure relief valve and the third delay control valve are closed, so that the auxiliary saturator is disconnected from the water supplementing tank and the outside; opening the first electromagnetic valve and the second electromagnetic valve to enable the main saturator to be communicated with the auxiliary saturator; under the action of the pressure of the main saturator, the liquid in the auxiliary saturator is pressed into the main saturator until the liquid levels of the main saturator and the auxiliary saturator are equal; at this time, the liquid level of the auxiliary saturator is positioned between the high water level liquid level switch and the low water level liquid level switch, and the control system receives the signal of the high water level liquid level switch and enters the compensation standby stage.
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| CN201446099U (en) * | 2009-07-08 | 2010-05-05 | 陈相荣 | Air conditioning dynamic fog-washing sterilizing machine |
| CN202305375U (en) * | 2011-10-28 | 2012-07-04 | 昆山一恒仪器有限公司 | Novel salt fog test box |
| CN205643116U (en) * | 2016-04-20 | 2016-10-12 | 上海林频仪器股份有限公司 | Multi -functional compound salt fog test box |
| CN206192849U (en) * | 2016-11-09 | 2017-05-24 | 浙江吉利控股集团有限公司 | Salt fog corrosion test device |
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