CN212059846U - Automatic liquid supplementing cathode stripping test device - Google Patents
Automatic liquid supplementing cathode stripping test device Download PDFInfo
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- CN212059846U CN212059846U CN202020241193.0U CN202020241193U CN212059846U CN 212059846 U CN212059846 U CN 212059846U CN 202020241193 U CN202020241193 U CN 202020241193U CN 212059846 U CN212059846 U CN 212059846U
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- 238000012360 testing method Methods 0.000 title claims abstract description 109
- 239000007788 liquid Substances 0.000 title claims abstract description 90
- 230000001502 supplementing effect Effects 0.000 title claims abstract description 8
- 238000009413 insulation Methods 0.000 claims abstract description 13
- 238000010438 heat treatment Methods 0.000 claims abstract description 12
- 238000005553 drilling Methods 0.000 claims description 67
- 230000007246 mechanism Effects 0.000 claims description 41
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 26
- 239000011780 sodium chloride Substances 0.000 claims description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 239000012153 distilled water Substances 0.000 claims description 7
- 238000005192 partition Methods 0.000 claims description 7
- 238000013459 approach Methods 0.000 claims description 5
- 230000009469 supplementation Effects 0.000 abstract 1
- 229910052751 metal Inorganic materials 0.000 description 42
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- 238000000576 coating method Methods 0.000 description 14
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- 238000005260 corrosion Methods 0.000 description 10
- 230000007547 defect Effects 0.000 description 10
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- 239000010959 steel Substances 0.000 description 5
- 239000004593 Epoxy Substances 0.000 description 4
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- 238000004210 cathodic protection Methods 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 238000001802 infusion Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
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- 229940075397 calomel Drugs 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- ZOMNIUBKTOKEHS-UHFFFAOYSA-L dimercury dichloride Chemical compound Cl[Hg][Hg]Cl ZOMNIUBKTOKEHS-UHFFFAOYSA-L 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
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- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 229910052697 platinum Inorganic materials 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 239000010963 304 stainless steel Substances 0.000 description 1
- 229910000589 SAE 304 stainless steel Inorganic materials 0.000 description 1
- 206010053615 Thermal burn Diseases 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000010349 cathodic reaction Methods 0.000 description 1
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Abstract
An automatic liquid supplementing cathode stripping test device comprises a voltmeter, a thermostat and a box cover unit, wherein an opening is formed in the top surface of the thermostat; the box cover unit comprises a box cover, and an auxiliary electrode, a reference electrode and a liquid supply device which are arranged on the box cover; the box cover is covered above the opening of the constant temperature box; the auxiliary electrode and the reference electrode are arranged on one side of the case cover facing the thermostat, the auxiliary electrode is connected with the positive electrode of the direct current power supply, the reference electrode is connected with the positive electrode of the voltmeter, the liquid supply device is provided with a liquid guide pipe, the liquid guide pipe penetrates through the case cover, and the outlet of the liquid guide pipe faces one side of the thermostat; the liquid supply device is provided with an insulation valve which is arranged on the liquid guide pipe and used for controlling the conduction of the liquid guide pipe. The utility model discloses an automatic liquid supplementation cathode stripping test device can automatic supplementary test medium in order to keep liquid level when carrying out corrosivity and detecting to reduce frequent switch constant temperature heating device, improve test efficiency.
Description
Technical Field
The utility model relates to a pipeline anticorrosive coating detects technical field, especially relates to an automatic fluid infusion negative pole peeling test device.
Background
In daily life, in order to ensure that metal products can be reliably used for a long time in a severe environment, the metal surface is usually coated with an anticorrosive layer such as epoxy powder paint with good anticorrosive effect and matched with a cathodic protection technology to prevent metal corrosion. The principle of the cathodic protection technology is that an external current is applied to the surface of a metal structure to enable the protected metal structure to become a cathode, so that the electronic migration caused by metal corrosion is inhibited, and the corrosion is avoided or weakened. However, if a defect occurs in the anticorrosive coating on the surface of the metal structure, the cathodic reaction causes the anticorrosive coating to lose adhesion and separate from the metal, which is called cathodic disbonding. Particularly, for steel pipelines for conveying petroleum and natural gas, the buried environment is severe, the temperature difference is large, surface defects such as corrosion and the like are particularly easily caused, and the cathode stripping phenomenon is generated. In order to ensure the reliability of cathodic protection, China sets up 'technical specification for steel pipeline sintering epoxy powder external coating' aiming at the cathodic disbonding phenomenon, and the technical specification stipulates that an anticorrosive pipeline production factory must test the cathodic disbonding resistance test of an anticorrosive coating on a steel pipe produced by the anticorrosive pipeline production factory.
According to the technical specification of the steel pipeline sintered epoxy powder external coating, the corrosion resistance of the anticorrosive coating needs to be detected in a cathodic disbonding test. The corrosion detection is to detect the characteristics of the metal test piece in the damaged and corrosive environments, and the structural schematic diagram of the equipment is shown in fig. 1, and the method comprises the following steps:
first, an operator takes a metal test piece 1 without a pinhole gap and drills an artificial defect hole 7 on its surface coated with an anticorrosive layer with a manual electric drill.
Then, a plastic tube 2 is taken and manually pressed and fixed on the metal test piece 1 by using sealant, and a test groove 6 with the metal test piece 1 as a bottom and the plastic tube 2 as a cavity is manufactured.
Next, the operator pours a sodium chloride solution as a test medium into the test bath 6, and inserts the platinum auxiliary electrode 4 and the calomel reference electrode 5 into the sodium chloride solution.
Subsequently, an operator connects the auxiliary electrode 4 with the positive electrode of the direct current power supply 3, connects the reference electrode 5 with the voltmeter 8, connects the metal test piece 1 with the negative electrode of the direct current power supply 3 and the voltmeter 8, and sets the voltage value of the direct current power supply 3 according to the technical specification of steel pipeline sintering epoxy powder outer coating.
Then, the whole test chamber 6 is heated at a constant temperature, and the auxiliary electrode 4 and the reference electrode 5 are ensured to be soaked in the sodium chloride solution during the constant-temperature heating process.
Finally, taking out the corroded metal test piece 1, and cutting eight cutting lines outwards by using a knife by taking the artificial defect hole 7 as a center to divide the circumference into eight equal parts, wherein the anticorrosive layer needs to be cut through when the cutting lines are cut, so that the metal base material is exposed; inserting a knife into the position below the anticorrosive coating from the artificial defect hole 7, and prying and peeling the anticorrosive coating along the scribing line by horizontal force until the anticorrosive coating shows obvious prying and peeling resistance; then measuring the stripping distance of each scribing line from the edge of the artificial defect hole 7 and calculating the average value of the stripping distances; and if the average value is within the performance index range, the product is qualified.
In the constant temperature heating process of corrosivity detection, in order to ensure that the metal test piece is always in a cathode protection state, the auxiliary electrode and the reference electrode are required to be ensured to be always soaked in a test medium to form an electrifying loop taking the metal test piece as a cathode, but constant temperature heating inevitably causes water evaporation in the test medium to cause the liquid level of the test medium to descend, so that solutions such as distilled water are required to be added into a test tank at intervals in the test process to ensure the liquid level height. Since the operation of supplementing moisture is performed by the operator, in order to reduce the scald and ensure the safety of the operator, the operation of supplementing moisture must be performed after the constant temperature heating is stopped, which causes frequent switching on and off of the constant temperature device, thereby affecting the efficiency and effect of the test. In addition, as can be seen from the above steps of the corrosion detection and the used devices, the manual operation involved in the corrosion detection is complicated and tedious, multiple mutually independent devices are required, the required devices are scattered, the devices arranged scattered and the complicated operation bring inconvenience to the operators in the test, and further the efficiency of the cathode stripping test is affected.
SUMMERY OF THE UTILITY MODEL
Based on this, the utility model aims at providing an automatic fluid infusion negative pole peeling test device is by the automatic supplementary liquid of test device to the liquid level that keeps test medium is in order to reduce frequent switch constant temperature heating device, and rationally sets up various required device, reduces manual operation, thereby improves negative pole peeling test's efficiency for corrosivity detection operation facilitates.
The utility model discloses a following technical scheme realizes:
an automatic liquid-supplementing cathode stripping test device comprises a voltmeter,
the top surface of the constant temperature box is provided with an opening; and
the box cover unit comprises a box cover, and an auxiliary electrode, a reference electrode and a liquid supply device which are arranged on the box cover; the box cover is covered above the opening of the constant temperature box; the auxiliary electrode and the reference electrode are arranged on one side, facing the incubator, of the case cover, the auxiliary electrode is connected with the positive electrode of the direct-current power supply, the reference electrode is connected with the positive electrode of the voltmeter, the liquid supply device is provided with a liquid guide pipe, the liquid guide pipe penetrates through the case cover, and the outlet of the liquid guide pipe faces one side of the incubator; the liquid supply device is provided with an insulating valve which is arranged on the liquid guide tube and is used for controlling the conduction of the liquid guide tube.
Compared with the prior art, the liquid feeder of the automatic liquid supplementing cathode stripping test device can automatically supplement liquid, after the box cover is closed and the insulating valve is opened, when the liquid level of a test medium descends, the liquid in the liquid feeder flows out automatically, the liquid does not need to be supplemented manually in the test process, and therefore the problem that the efficiency of a test is influenced due to frequent opening and closing of the constant temperature device is avoided.
The device further comprises a guide rail, wherein the guide rail is arranged above the opening of the constant temperature box;
a main control unit; the main control unit is respectively electrically connected with the box cover unit and controls the movement of the box cover unit, electrically connected with the insulating valve and controls the opening and closing of the insulating valve, and electrically connected with the constant temperature box and controls the constant temperature heating of the constant temperature box; the box cover unit also comprises a box cover sliding block and a box cover telescopic rod; the box cover slider cover is established and is followed its slip on the guide rail, the box cover telescopic link is fixed on the box cover slider, the box cover is fixed the tip of box cover telescopic link, main control unit control the box cover slider and the motion of box cover telescopic link.
The cover of the box cover, the opening of the insulating valve and the constant-temperature heating are controlled by the main control unit, manual operation in the test process is reduced, the automation degree is improved, and the test efficiency is further improved.
Further, on the side of the box cover facing the incubator, the lengths of the auxiliary electrode and the reference electrode are larger than the length of the liquid guide pipe. Because the length of the auxiliary electrode and the reference electrode is larger than that of the catheter, the auxiliary electrode and the reference electrode are always soaked in a test medium in the test process.
Furthermore, a partition plate is further arranged in the liquid supply device, the partition plate divides the liquid supply device into a first containing cavity and a second containing cavity which are mutually independent, the first containing cavity and the second containing cavity are respectively communicated with the test groove through the liquid guide pipe, and the insulation valve is arranged on the liquid guide pipe of the first containing cavity and the second containing cavity. Different test media can be contained in the liquid supply device through the arrangement of the partition plate, and various test requirements are met.
Further, the liquid guide pipe is a Y-shaped pipe, and two inlets of the Y-shaped pipe are respectively communicated with the first cavity and the second cavity. The Y-tube simplifies the structure of the catheter.
The drilling device further comprises a drilling unit, a drilling mechanism and a drilling mechanism, wherein the drilling unit comprises a drilling slide block, a drilling moving mechanism, a drilling telescopic support and a drill bit; the drilling slide block is sleeved on the guide rail and slides along the guide rail; the drilling moving mechanism is arranged on the drilling sliding block and moves along the drilling sliding block; the drilling telescopic bracket is fixed on the drilling moving mechanism and can be telescopic towards the direction of the constant temperature box; the drill bit is fixed on the drilling telescopic bracket and moves telescopically along with the drilling telescopic bracket;
the plastic cylinder mounting unit comprises a mounting sliding block, a mounting telescopic bracket, a mounting first moving mechanism, a mounting second moving mechanism and a plastic cylinder; the mounting sliding block is sleeved on the guide rail and moves along the guide rail; the mounting telescopic bracket is fixed on the mounting slide block and can be telescopic towards the direction of the constant temperature box; the first mounting moving mechanism and the second mounting moving mechanism are arranged on the telescopic mounting bracket and can approach to each other or separate from each other to clamp or release the plastic cylinder;
the main control unit is electrically connected with the drilling unit and the plastic cylinder mounting unit respectively and controls the movement of the drilling unit and the plastic cylinder mounting unit.
Through setting up drilling unit and plastic cylinder installation unit, the manual operation of other steps in the further corrosivity test that reduces further improves degree of automation to further improve test efficiency.
Further, the thermostated container still includes temperature sensor and alarm, just main control unit with temperature sensor and alarm, and control temperature sensor and alarm work. Set up temperature sensor and alarm and conveniently remind operating personnel to take out the test tank to carry out experimental next step operation, or play the effect of reminding under the abnormal conditions, thereby improve the security of this device.
Further, the first cavity is used for containing a sodium chloride solution, and the second cavity is used for containing distilled water. Different solutions are provided according to the steps of corrosivity detection and the requirements of the test process.
For a better understanding and an implementation, the present invention is described in detail below with reference to the accompanying drawings.
Drawings
FIG. 1 is a schematic illustration of corrosion detection in the prior art;
FIG. 2 is a schematic view of the overall structure of the automatic liquid-feeding cathode stripping test device of the present invention;
FIG. 3 is a schematic view of the process for detecting corrosion in the present invention
Fig. 4 is a schematic structural view of an incubator according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a drilling unit according to an embodiment of the present invention;
fig. 6 is a schematic structural view of a plastic cartridge mounting unit according to an embodiment of the present invention;
fig. 7 is a schematic structural view of a case cover unit according to an embodiment of the present invention;
fig. 8 is a schematic view of a liquid supply according to an embodiment of the present invention;
fig. 9 is a partial sectional view of the cover of the present invention after closing.
Detailed Description
Referring to fig. 2, the automatic liquid feeding cathode stripping test apparatus of the present invention includes a thermostat 10, a guide rail 20, a drilling unit 30, a plastic cylinder mounting unit 40, a box cover unit 50, and a main control unit (not shown) for controlling the operation of each unit; an opening is formed in the top surface of the constant temperature box 10; the guide rail 20 is arranged above the opening of the incubator 10; the metal test piece 1 is placed in the constant temperature box 10, and the anticorrosive layer of the metal test piece 1 faces upwards; the drilling unit 30, the plastic cylinder mounting unit 40 and the case cover unit 50 are sequentially arranged on the guide rail 20, and the drilling unit 30, the plastic cylinder mounting unit 40 and the case cover unit 50 move along the guide rail of the guide rail 20 under the control of the main control unit and perform relevant test operations of corrosivity detection. Referring to fig. 3, the operation of detecting corrosivity mainly includes the following steps:
s1 drilling: the main control unit controls the drilling unit 30 to drill the metal test piece 1;
s2, mounting a plastic barrel: the main control unit controls the plastic cylinder mounting unit 40 to mount the plastic cylinder 2 to the metal test piece 1;
s3: the main control unit controls the cover unit 50 to move and close the opening of the incubator 10;
s4: the main control unit controls the thermostat 10 to perform constant temperature heating.
The structure of the automatic liquid-supplementing cathode stripping test device of the utility model is further explained as follows:
specifically, referring to fig. 4, in the present embodiment, the incubator 10 is a box body, and includes a box body 100, a display screen 110, a button 120, a dc power supply (not shown), a voltmeter (not shown), and a heater (not shown). An upward opening is formed in the top surface of the box body 100, and the metal test piece 1 is placed on the inner bottom surface of the box body 100; the guide rail 20 is positioned above the opening of the box body 100; the heater is arranged in the box body 100, after the heater is electrified, the main control unit controls the heater to generate heat and keeps the temperature in the incubator 10 between 10 and 250 ℃, and preferably, the material of the inner container of the box body 100 is 304 stainless steel; a display screen 110 for displaying test parameters and operation instructions and a button 120 for controlling each unit to work are arranged on one side of the box body 100, various parameter operation tests are set by pressing the button 120, and test results and test operation instructions are displayed on the display screen 110; a direct-current power supply positive electrode interface 101 and a voltmeter interface 102 are arranged on the outer side of the box body 100, the direct-current power supply positive electrode interface 101 is connected with a positive electrode of the direct-current power supply, and the voltmeter interface 102 is connected with a positive electrode of the voltmeter; correspondingly, a direct-current power supply negative electrode connector (not shown) connected with the direct-current power supply negative electrode and a voltmeter connector (not shown) connected with the voltmeter negative electrode are arranged in the box body 100, preferably, the direct-current power supply negative electrode connector and the voltmeter connector are telescopic connectors, and the main control unit controls the telescopic connectors to be telescopic, so that the direct-current power supply negative electrode connector and the voltmeter connector are automatically far away from or close to the metal test piece 1. Further, a temperature sensor (not shown) and an alarm (not shown) are also arranged in the incubator 10, when the heating temperature detected by the temperature sensor exceeds a set value, the main control unit controls the heater to be powered off and the alarm to give out a buzzer alarm, or when the set time is up, the main control unit controls the heater to be powered off and the alarm to give out a buzzer alarm; further, the display screen 110 is a touch screen, and test parameters are set through the touch screen.
During testing, the metal test piece 1 is placed on the inner bottom surface of the box body 100 of the constant temperature box 10, and the anticorrosive layer of the metal test piece 1 faces upwards. After the button 120 is pressed, the main controller controls each unit to work, and the test result is displayed on the display screen 110.
Referring to fig. 5, the drilling unit 30 includes a drilling slider 300, a drilling moving mechanism 310, a drilling telescopic bracket 320, and a drill 330; the drilling sliding block 300 is sleeved on the guide rail 20 and moves along the guide rail 20, and the drilling sliding block 300 is in a strip shape and is vertical to the guide rail 20; the drilling moving mechanism 310 is arranged on the drilling slide block 300 and moves along the drilling slide block 300, and the moving directions of the drilling slide block 300 and the drilling moving mechanism 310 are perpendicular to each other in a horizontal plane; the drilling telescopic bracket 320 is arranged on the drilling moving mechanism 310 and can be telescopic towards the inner bottom surface direction of the box body 100; the drill bit 330 is fixed on the drilling telescopic bracket 320 and moves along with the drilling telescopic bracket; the main control unit controls the drilling slider 300 to slide toward the incubator 10, controls the movement of the drilling moving mechanism 310 and the extension and retraction of the drilling telescopic bracket 320, and controls the drill bit 330 to rotate so as to perform drilling. In this embodiment, an electric drill in the prior art is used and connected to a power supply, the drill bit of the electric drill is the drill bit 330 and is driven by a motor to rotate, the main control unit controls a switch of the electric drill, and the drill bit 330 rotates when the power supply is turned on. Preferably, in order to reduce the influence of vibration during drilling, the number of the drilling moving mechanisms 310 is two, and the drilling telescopic bracket 320 is disposed between the two drilling moving mechanisms 310.
During testing, the main control unit controls the drilling slide block 300 to move along the guide rail 20 and slide to the position above the metal test piece 1; controlling the drilling moving mechanism 310 to move the drill bit 330 above the preset position of the artificial defect hole 7; the drilling telescopic support 320 is controlled to drive the drill bit 330 to approach the metal test piece 1, the drill bit 330 is started to drill the metal test piece 1, the drilling depth is determined according to the thickness of the anticorrosive coating of the metal test piece 1 until the artificial defect hole 7 penetrates through the anticorrosive coating and exposes a metal base material, and after the artificial defect hole 7 is obtained, the drilling unit 30 is controlled to leave the incubator 10.
Referring to fig. 6, the plastic tube mounting unit 40 includes a mounting slider 400, a mounting telescopic bracket 410, a mounting first moving mechanism 420, a mounting second moving mechanism 430, and a plastic tube 2. The mounting slider 400 is sleeved on the guide rail 20 and moves along the guide rail; the mounting telescopic bracket 410 is fixed on the cylinder mounting slide block 400 and extends and retracts towards the inner bottom surface direction of the box body 100, a long strip-shaped fixed block is fixed at the telescopic end of the mounting telescopic bracket 410, and the fixed block is vertical to the guide rail 20; the mounting first moving mechanism 420 and the mounting second moving mechanism 430 are disposed on and move along the fixed block of the mounting telescopic bracket 410, the moving direction of the mounting slider 400 and the moving direction of the mounting first moving mechanism 420 and the mounting second moving mechanism 430 are perpendicular to each other in a horizontal plane, and the main control unit controls the mounting first moving mechanism 420 and the mounting second moving mechanism 430 to approach each other to clamp the plastic cylinder 2 or controls the mounting first moving mechanism 420 and the mounting second moving mechanism 430 to separate from each other to release the plastic cylinder 2; the plastic cylinder 2 is a cylinder with openings at two ends. The main control unit controls the first mounting moving mechanism 420 and the second mounting moving mechanism 430 to clamp the plastic tube 2, controls the mounting slider 400 to slide to the incubator 2, and controls the telescopic bracket 410 to extend and retract, so that the plastic tube 2 is mounted on the metal test piece 1 to form the test slot 6.
During the test, the main control unit controls the first moving mechanism 420 and the second moving mechanism 430 to approach each other and clamp the plastic cylinder 2, and the opening of the plastic cylinder 2 facing one side of the incubator 10 is coated with sealant in advance; controlling the mounting slide block 400 to slide and moving the plastic cylinder 2 to the upper part of the metal test piece 1; controlling the mounting telescopic bracket 410 to extend and push the plastic cylinder 2 to the metal test piece 1, wherein the artificial defect hole 7 is positioned in the plastic cylinder 2; the mounting telescopic bracket 410 is controlled to press the plastic cylinder 2 against the metal test piece 1, the test groove 6 is made by sealing with sealant, then the mounting first moving mechanism 420 and the mounting second moving mechanism 430 are controlled to be separated from each other and the plastic cylinder 2 is released, and the plastic cylinder mounting unit 40 is controlled to be separated from the incubator 10.
Referring to fig. 7 to 9, the cover unit 50 includes a cover 500, a cover slider 510, a cover extension rod 520, a liquid supply device 530, an auxiliary electrode 4 made of a platinum electrode, and a reference electrode 5 made of a calomel electrode. The case cover 500 is fixed to an end of the case cover telescopic rod 520, the case cover telescopic rod 520 is telescopic toward the inner bottom surface of the case body 100, and the case cover telescopic rods 520 are 4 in number and are respectively arranged at four angular positions of the case cover 500 in the present embodiment; the case cover sliding blocks 510 are connected with the case cover telescopic rods 520, sleeved on the guide rails 20 and sliding along the guide rails 20, and correspondingly, in this embodiment, the number of the case cover sliding blocks 510 is 4 and the two case cover sliding blocks are oppositely arranged on the guide rails 20 on the two sides; the liquid supply device 530 is disposed on the case cover 500 for supplying liquid, in this embodiment, a partition 531 is disposed in the liquid supply device 530 to partition the liquid supply device 530 into a first cavity 532 and a second cavity 533 which are independent of each other for storing different liquids, in this embodiment, the first cavity 532 is used for containing a sodium chloride solution, the second cavity 533 is used for containing distilled water, the first cavity 532 and the second cavity 533 are respectively communicated with the test chamber 6 through the liquid guide tube 534, preferably, the liquid guide tube 534 is a Y-shaped tube made of an insulating material, two inlets of the Y-shaped tube are respectively communicated with the first cavity 532 and the second cavity 533, the liquid guide tube 534 penetrates through the case cover, and an outlet of the liquid guide tube 534 is disposed on one side of the case cover 500 close to the incubator 10, preferably, the liquid guide tube 534 is made of an insulating material such as glass or plastic; the liquid supply device 530 is further provided with an insulation valve 535 controlled by the main control unit, the insulation valve 535 is a conventional control valve, in this embodiment, the insulation valve 535 is a butterfly valve made of insulation material, and the insulation valve 535 is arranged on the liquid guide pipe 534 for controlling the opening and closing of the liquid guide pipe 534, the insulation valve 535 is controlled by the main control unit rotating the insulation valve 535 to control the liquid flowing out and closing; the auxiliary electrode 4 and the reference electrode 5 are respectively arranged on the case cover 500 and face one side of the incubator, and the lengths of the auxiliary electrode 4 and the reference electrode 5 are larger than that of the liquid guide pipe 534 on the side of the case cover 500 facing the incubator 10; preferably, the auxiliary electrode 4 and the reference electrode 5 have the same length on the side of the cover 500 facing the oven 10.
During the test, the main control unit controls the case cover slide block 510 to drive the case cover 500 to slide to the upper part of the opening of the incubator 10; controlling the extension of the cover extension rod 520 and pushing the cover 500 toward the incubator 10 to close the opening of the incubator 10, the outlet of the liquid guide 534, the auxiliary electrode 4, and the reference electrode 5 being located in the body of the test cell 6; controlling an insulation valve 535 positioned beside the first cavity 532 to be opened, controlling the sodium chloride solution to flow into the plastic cylinder 2 along the liquid guide pipe 534 until the liquid level of the sodium chloride solution reaches the outlet of the liquid guide pipe 534, controlling the insulation valve 535 positioned beside the second cavity 533 to be closed, controlling the insulation valve 535 positioned beside the distilled water liquid supply device 533 to be opened, and controlling the distilled water not to flow into the plastic cylinder 2 due to the action of atmospheric pressure, so that the liquid level of the sodium chloride solution in the plastic cylinder 2 is kept stable. The auxiliary electrode 4 is connected to the positive interface 101 of the direct current power supply through a lead, the reference electrode 5 is connected to the voltmeter interface 102 through a lead, and the main control unit controls the negative terminal of the direct current power supply and the voltmeter terminal to extend and be connected with the metal test piece 1. The main control unit controls the heater to be electrified and heats the test groove 6 in the constant temperature box at constant temperature. The moisture of the sodium chloride solution is continuously evaporated due to the evaporation effect, so that the level of the sodium chloride solution in the plastic cylinder 2 is lowered, air enters the second cavity 533 from the outlet of the liquid guide pipe 534 through the opened insulation valve 535, distilled water is pressed out of the plastic cylinder 2 due to the air pressure until the level of the sodium chloride solution in the plastic cylinder 2 reaches the outlet of the liquid guide pipe 534 again to reach the air pressure balance, so that the moisture is automatically replenished in the test process, and the auxiliary electrode 4 and the reference electrode 5 are always soaked in the sodium chloride solution because the length of the auxiliary electrode 4 and the length of the reference electrode 5 are greater than that of the liquid guide pipe 534 on the side of the box cover 500 facing the constant temperature box 10. A lead connected with the auxiliary electrode 4 is inserted into the dc power supply positive electrode interface 101, a lead connected with the reference electrode 5 is inserted into the voltmeter interface 102, the main control unit controls the dc power supply negative electrode terminal and the voltmeter terminal to be connected with the metal test piece 1, thereby forming an energizing loop for making the metal test piece 1 a cathode by the auxiliary electrode 4 connected with the positive electrode of the dc power supply, the metal test piece 1 connected with the negative electrode of the dc power supply, and a test medium, and forming a reference loop for setting the dc power supply output voltage by the reference electrode 5 connected with the positive electrode of the voltmeter, the metal test piece 1 connected with the negative electrode of the voltmeter, and the test medium, because the metal test piece 1 is connected with the negative electrode of the dc power supply, when the direct current power supply is switched on, the metal test piece 1 is in a cathode protection state.
After the test period is finished, the main control unit controls the heater to be powered off, the alarm gives out a buzzer sound to give an alarm, the test groove 6 is taken out, and the metal test piece 1 is cut and pried to peel the coating as required after being cooled to the room temperature.
Finally, it is noted that the movement and extension of the above mechanisms are driven by a power device such as an electric motor or a hydraulic pump, and the arrangement of the electric motor or the hydraulic pump is conventional in the prior art, and will not be further described here.
Compared with the prior art, the utility model discloses an automatic fluid infusion negative pole peeling test device sets up according to test step and required equipment, can supply liquid automatically in the in-process of constant temperature heating, need not the manual work and supplies liquid to avoid frequent switch constant temperature equipment to lead to influencing experimental efficiency and effect. In addition, further carry out integration setting to the required equipment of corrosivity detection to improve its degree of automation, reduce artificial operation in the test process, further improve experimental efficiency, the device can satisfy the multiple demand that corrosivity detected.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention.
Claims (8)
1. An automatic liquid supplementing cathode stripping test device comprises a voltmeter and is characterized by comprising
The top surface of the constant temperature box is provided with an opening; and
the box cover unit comprises a box cover, and an auxiliary electrode, a reference electrode and a liquid supply device which are arranged on the box cover; the box cover is covered above the opening of the constant temperature box; the auxiliary electrode and the reference electrode are arranged on one side, facing the incubator, of the case cover, the auxiliary electrode is connected with the positive electrode of the direct-current power supply, the reference electrode is connected with the positive electrode of the voltmeter, the liquid supply device is provided with a liquid guide pipe, the liquid guide pipe penetrates through the case cover, and the outlet of the liquid guide pipe faces one side of the incubator; the liquid supply device is provided with an insulating valve which is arranged on the liquid guide tube and is used for controlling the conduction of the liquid guide tube.
2. The automatic liquid replenishing cathodic disbonding test device according to claim 1, further comprising
The guide rail is arranged above the opening of the constant temperature box;
a main control unit; the main control unit is respectively electrically connected with the box cover unit and controls the movement of the box cover unit, electrically connected with the insulating valve and controls the opening and closing of the insulating valve, and electrically connected with the constant temperature box and controls the constant temperature heating of the constant temperature box;
the box cover unit also comprises a box cover sliding block and a box cover telescopic rod; the box cover slider cover is established and is followed its slip on the guide rail, the box cover telescopic link is fixed on the box cover slider, the box cover is fixed the tip of box cover telescopic link, main control unit control the box cover slider and the motion of box cover telescopic link.
3. The automatic liquid replenishing cathodic disbonding test device according to claim 2, wherein the auxiliary electrode and the reference electrode have a length larger than that of the liquid guide tube on the side of the box cover facing the incubator.
4. The automatic liquid supplementing cathode stripping test device according to claim 3, wherein a partition plate is further arranged in the liquid supply device, the partition plate divides the liquid supply device into a first containing cavity and a second containing cavity which are independent of each other, the first containing cavity and the second containing cavity are respectively communicated with the interior of the thermostat through the liquid guide pipe, and the insulation valve is arranged on the liquid guide pipe of the first containing cavity and the second containing cavity.
5. The automatic liquid replenishment cathodic disbonding test device according to claim 4, wherein said liquid guide tube is a Y-shaped tube, and two inlets of said Y-shaped tube are respectively communicated with said first and second chambers.
6. The automatic liquid replenishing cathodic disbonding test device according to claim 2, further comprising
The drilling unit comprises a drilling slide block, a drilling moving mechanism, a drilling telescopic support and a drill bit; the drilling slide block is sleeved on the guide rail and slides along the guide rail; the drilling moving mechanism is arranged on the drilling sliding block and moves along the drilling sliding block; the drilling telescopic bracket is fixed on the drilling moving mechanism and can be telescopic towards the direction of the constant temperature box; the drill bit is fixed on the drilling telescopic bracket and moves telescopically along with the drilling telescopic bracket;
the plastic cylinder mounting unit comprises a mounting sliding block, a mounting telescopic bracket, a mounting first moving mechanism, a mounting second moving mechanism and a plastic cylinder; the mounting sliding block is sleeved on the guide rail and moves along the guide rail; the mounting telescopic bracket is fixed on the mounting slide block and can be telescopic towards the direction of the constant temperature box; the first mounting moving mechanism and the second mounting moving mechanism are arranged on the telescopic mounting bracket and can approach to each other or separate from each other to clamp or release the plastic cylinder;
the main control unit is electrically connected with the drilling unit and the plastic cylinder mounting unit respectively and controls the movement of the drilling unit and the plastic cylinder mounting unit.
7. The automatic liquid replenishing cathode stripping test device according to any one of claims 2 to 6, wherein the incubator further comprises a temperature sensor and an alarm, and the main control unit controls the temperature sensor and the alarm to operate.
8. The automatic liquid replenishment cathodic disbonding test device of claim 4, wherein the first cavity is used for containing sodium chloride solution and the second cavity is used for containing distilled water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020241193.0U CN212059846U (en) | 2020-03-02 | 2020-03-02 | Automatic liquid supplementing cathode stripping test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020241193.0U CN212059846U (en) | 2020-03-02 | 2020-03-02 | Automatic liquid supplementing cathode stripping test device |
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| Publication Number | Publication Date |
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| CN212059846U true CN212059846U (en) | 2020-12-01 |
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| CN202020241193.0U Active CN212059846U (en) | 2020-03-02 | 2020-03-02 | Automatic liquid supplementing cathode stripping test device |
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| Country | Link |
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| CN (1) | CN212059846U (en) |
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2020
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