CN219532860U - Lining structure accelerated corrosion test device - Google Patents
Lining structure accelerated corrosion test device Download PDFInfo
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- CN219532860U CN219532860U CN202222554697.XU CN202222554697U CN219532860U CN 219532860 U CN219532860 U CN 219532860U CN 202222554697 U CN202222554697 U CN 202222554697U CN 219532860 U CN219532860 U CN 219532860U
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Abstract
The utility model provides a lining structure accelerated corrosion test device for more accurately simulating the actual corrosion effect of a lining structure in an underground or underwater corrosion environment, and relates to the technical field of civil engineering concrete structure durability test devices. The lining structure accelerated corrosion test device comprises a designed concentration corrosive liquid storage tank, a high concentration corrosive liquid storage tank, a controller, a first booster pump, a second booster pump, a first concentration sensor, a corrosion water tank which is arranged in a sealing manner, a corrosive liquid preparation tank and a filter tank; a filtering structure for filtering rust products is arranged in the filtering box, and the inner cavity of the filtering box is divided into a polluted liquid storage cavity and a purified liquid storage cavity by the filtering structure; the device is characterized in that a stirring device is arranged in the corrosion water tank, the corrosion water tank is communicated with the polluted liquid storage cavity through a first pipeline, and an overflow valve is arranged on the first pipeline. The utility model can more accurately study the erosion degradation rule of the tunnel lining structure under the condition.
Description
Technical Field
The utility model relates to the technical field of durability test devices of civil engineering concrete structures, in particular to an accelerated corrosion test device of a lining structure.
Background
With the development of national economy and the development of society, underwater tunnels are developed vigorously, and the segment lining is used as a main structure of a shield tunnel load, so that the mechanical property and durability of the segment lining determine the overall quality and safety of the shield tunnel. When the shield tunnel segment is under the load of water and soil for a long time, the lining will inevitably generate cracks. In a subsea aggressive environment, these cracks will become a rapid intrusion path for the various ions and eventually cause cracking, skinning, spalling and continued development of cracks in the concrete protective layer. And then destroy inside reinforcing bar passive film, make the reinforcing bar produce rust bloated, desquamation and rotten, not only make the cost of maintenance of tunnel in long-term operation improve by a wide margin, make tunnel structure's life also significantly reduced. In the research of lining durability, an indoor accelerated corrosion test method is generally used for simulating the evolution of actual engineering in a corrosion degradation environment, and a simulation test of the whole process performance of structural corrosion degradation in a short period can be realized by combining a similar theory and an electrochemical method, so that test basis is provided for the design, maintenance, life prediction and the like of a tunnel.
In the test research of high water pressure corrosion, the utility model patent No. CN 109100293 discloses a double-side corrosion type lining structure accelerated corrosion test device, which comprises a corrosion water tank which is arranged on the outer side of a lining structure and is closed, and further comprises a concentration sensor, a pressure sensor, a first booster pump, a second booster pump, a third booster pump, a high-concentration corrosion liquid storage tank, a designed concentration corrosion liquid storage tank, a controller and a salt spray tank. The device adjusts the solution concentration in the corrosion water tank through high concentration corrosion solution storage tank and concentration sensor, but under normal test condition, find that a large amount of corrosion products can be precipitated at the crack in the corrosion water tank with time, corrosion products and solution mixing will change the solution concentration in the test, can't guarantee the stability of solution concentration, more importantly, corrosion products often are mud form, can adhere to the surface of test lining, and some corrosion products can imbed in the corrosion crack, will block up the transport passageway of chloride ion, greatly influence the invasion speed of chloride ion, thereby further reduce the development of crack, this has great difference with the corrosion conditions in the real underground especially underwater corrosion environment, be difficult to accurately simulate the actual corrosion effect of lining structure in underground or underwater corrosion environment for a long time.
Disclosure of Invention
The utility model aims to provide a lining structure accelerated corrosion test device which can more accurately simulate the actual corrosion effect of a lining structure in an underground or underwater corrosion environment.
The technical scheme adopted for solving the technical problems is as follows: the lining structure accelerated corrosion test device comprises a designed concentration corrosion liquid storage tank, a high concentration corrosion liquid storage tank, a controller, a first booster pump, a second booster pump, a first concentration sensor and a corrosion water tank which is arranged in a sealing manner, wherein the designed concentration corrosion liquid storage tank is communicated with the corrosion water tank through the first booster pump, a signal output end of the first concentration sensor is electrically connected with a signal input end of the controller, and a signal output end of the controller is electrically connected with a control signal input end of the second booster pump;
a filtering structure for filtering rust products is arranged in the filtering box, and the inner cavity of the filtering box is divided into a polluted liquid storage cavity and a purified liquid storage cavity by the filtering structure;
the corrosion water tank is internally provided with a stirring device, the corrosion water tank is communicated with a polluted liquid storage cavity through a first pipeline, an overflow valve is arranged on the first pipeline, the purified liquid storage cavity is communicated with a corrosion liquid preparation tank through a second pipeline, and the corrosion liquid preparation tank is communicated with a corrosion liquid storage tank with designed concentration through a third pipeline;
the first concentration sensor is arranged in the corrosive liquid preparation box, and the high-concentration corrosive liquid storage box is communicated with the corrosive liquid preparation box through the second booster pump.
Further, the corrosion liquid treatment device further comprises a tap water storage tank and a third booster pump, wherein the tap water storage tank is communicated with the corrosion liquid preparation tank through the third booster pump, and the signal output end of the controller is electrically connected with the control signal input end of the third booster pump.
Further, the filtering structure comprises a filter screen and filter cotton arranged on one side of the filter screen close to the purifying liquid storage cavity.
Further, the contaminated liquid storage chamber is located above the purified liquid storage chamber.
Further, the second pipeline and the third pipeline are oppositely arranged on the side wall of the corrosive liquid preparation box, the liquid outlets of the third booster pump and the second booster pump in the corrosive liquid preparation box are all arranged at the bottom of the corrosive liquid preparation box, and the first concentration sensor is arranged on one side of the inlet of the third pipeline.
Further, a stirring device is also arranged in the corrosive liquid preparation box.
Further, a stirring device is also arranged in the corrosion solution storage tank with the designed concentration.
Further, the corrosion-resistant water tank further comprises a second concentration sensor, a pressure sensor and an alarm, wherein the second concentration sensor and the pressure sensor are respectively arranged in the designed concentration corrosion-resistant water tank, the signal input ends of the second concentration sensor and the pressure sensor are respectively electrically connected with the signal input end of the controller, and the signal output end of the controller is electrically connected with the signal input end of the alarm.
The beneficial effects of the utility model are as follows: according to the lining structure accelerated corrosion test device, the stirring device is arranged in the corrosion water tank, the corrosion liquid containing the corrosion product is timely discharged through the first pipeline, the discharged corrosion liquid is filtered by the filter box and then returns to the designed concentration corrosion liquid storage box, excessive corrosion products in the corrosion water tank are prevented from adhering to the surface of the lining structure and being embedded into corrosion cracks, the environment in the corrosion water tank is enabled to be more similar to the corrosion condition in the underground, particularly underwater corrosion environment, so that the corrosion degradation rule of the tunnel lining structure under the condition can be more accurately researched, and important support is provided for accurately and scientifically judging the safety and reliability of the tunnel lining structure in the whole life cycle.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model;
FIG. 2 is a schematic diagram of the structure of the present utility model;
FIG. 3 is a schematic view of the structure of the filter box;
the figure shows: lining structure 1, corrosion water tank 2, first booster pump 3, design concentration corrosive liquid storage tank 4, corrosive liquid preparation tank 5, filter tank 6, first pipeline 7, controller 8, second booster pump 9, high concentration corrosive liquid storage tank 10, second pipeline 11, third pipeline 12, running water storage tank 13, third booster pump 14, alarm 15, agitating unit 21, second concentration sensor 22, pressure sensor 23, first concentration sensor 51, filter structure 61, contaminated liquid storage chamber 62, purified liquid storage chamber 63, overflow valve 71, filter screen 611, and filter cotton 612.
Detailed Description
The utility model will be further described with reference to the drawings and examples.
As shown in fig. 1 to 3, the accelerated corrosion test device for a segment lining structure comprises a designed concentration corrosive liquid storage tank 4, a high concentration corrosive liquid storage tank 10, a controller 8, a first booster pump 3, a second booster pump 9, a first concentration sensor 51 and a corrosion water tank 2 which is arranged on one side of the lining structure 1 and is arranged in a closed mode, wherein the designed concentration corrosive liquid storage tank 4 is communicated with the corrosion water tank 2 through the first booster pump 3, a signal output end of the first concentration sensor 51 is electrically connected with a signal input end of the controller 8, and a signal output end of the controller 8 is electrically connected with a control signal input end of the second booster pump 9. The above structure is the same as that of the conventional test device. In order to more accurately simulate the actual corrosion effect of the lining structure in an underground or underwater corrosion environment, the utility model is also provided with a corrosive liquid preparation tank 5 and a filter tank 6. A filtering structure 61 for filtering rust products is arranged in the filtering box 6, and the filtering structure 61 divides the inner cavity of the filtering box 6 into a polluted liquid storage cavity 62 and a purified liquid storage cavity 63; the inside of the corrosion water tank 2 is provided with a stirring device 21, the corrosion water tank 2 is communicated with a polluted liquid storage cavity 62 through a first pipeline 7, the first pipeline 7 is provided with an overflow valve 71, the purified liquid storage cavity 63 is communicated with a corrosion liquid preparation tank 5 through a second pipeline 11, and the corrosion liquid preparation tank 5 is communicated with a corrosion liquid storage tank 4 with designed concentration through a third pipeline 12; the first concentration sensor 51 is disposed in the etching solution preparing tank 5 to measure the chloride ion concentration of the liquid in the etching solution preparing tank 5, and the high concentration etching solution storage tank 10 is communicated with the etching solution preparing tank 5 through the second booster pump 9.
The etching tank 2 in the present utility model is used for storing an etching liquid, typically brine. The opening pressure of the relief valve 71 is set according to the reference water pressure at the location of the lining structure of the project. In the test device, when the test device is used for testing, the first booster pump 3 is started, the first booster pump 3 pumps the designed concentration corrosive liquid of the designed concentration corrosive liquid storage tank 4 into the corrosive water tank 2, the stirring device 21 works, so that the corrosive liquid in the corrosive water tank 2 is kept in a flowing state, and corrosion products precipitated in the lining structure are prevented from being attached to the surface of the lining structure 1 and being embedded into corrosion cracks. When the pressure in the corrosion water tank 2 reaches the water pressure value required by the experiment, the overflow valve 71 is opened to discharge the corrosion liquid into the polluted liquid storage chamber 62 of the filter box 6, and the overflow valve 71 can maintain the corrosion water tank 2 stable. After entering the polluted liquid storage cavity 62, the corrosive liquid is removed by the filtering structure 61, enters the purified liquid storage cavity 63, and enters the corrosive liquid preparation tank 5 through the second pipeline 11. The first concentration sensor 51 detects the chloride ion concentration of the corrosive liquid in the corrosive liquid preparing tank 5 in real time, and transmits a signal to the controller 8, when the chloride ion concentration detected by the first concentration sensor 51 is lower than a set value, the controller 8 controls the second booster pump 9 to start, and the high-concentration corrosive liquid in the high-concentration corrosive liquid storage tank 10 is discharged into the corrosive liquid preparing tank 5 until the concentration in the corrosive liquid preparing tank 5 reaches a required value and then stops. The etching solution reaching the concentration requirement finally flows into the etching solution storage tank 4 with the designed concentration through the third pipeline 12.
According to the lining structure accelerated corrosion test device, the stirring device 21 is arranged in the corrosion water tank 2, the corrosion liquid containing corrosion products is timely discharged through the first pipeline 7, the discharged corrosion liquid is filtered by the filter box 6 and then returns to the designed concentration corrosion liquid storage box 4, excessive corrosion products in the corrosion water tank 2 are prevented from adhering to the surface of the lining structure 1 and being embedded into corrosion cracks, the environment in the corrosion water tank 2 is enabled to be more similar to the corrosion condition in the underground, particularly underwater corrosion environment, so that the corrosion degradation rule of the tunnel lining structure under the condition can be accurately researched, and important support is provided for accurately and scientifically judging the safe and reliable performance of the tunnel lining structure in the whole life cycle.
The stirring device 21 may be any of various stirring devices, such as: the propeller type stirring device, turbine type stirring drill device, etc. are not particularly required here.
In general, the chloride ion concentration of the corrosive liquid is reduced along with the corrosion of the lining structure, but the chloride ion concentration in the corrosive liquid is increased due to long-term evaporation of the liquid in the storage tank, the filter tank and the corrosive water tank, and for this purpose, the utility model is also provided with a tap water storage tank 13 and a third booster pump 14, wherein the tap water storage tank 13 is communicated with the corrosive liquid preparation tank 5 through the third booster pump 14, and the signal output end of the controller 8 is electrically connected with the control signal input end of the third booster pump 14. Thus, when the chloride ion concentration detected by the first concentration sensor 51 is higher than the set value, the controller 8 controls the third booster pump 14 to be started, and pumps the tap water tank 13 into the etching solution preparing tank 5 until the chloride ion concentration in the etching solution preparing tank 5 reaches the required value.
In order to ensure that the corrosive liquid entering the corrosive liquid storage tank 4 with designed concentration is uniformly mixed and the concentration of chloride ions is closer to the designed required concentration value in the liquid preparation process, it is understood that the inlet of the third pipeline 12 should be located as far as possible from the third booster pump 14 and the outlet of the second booster pump 9 in the corrosive liquid preparation tank 5, and the inlet of the third pipeline 12 should be located as far as possible from the outlet of the second pipeline 11. In order to achieve the above objective, in the embodiment of the present utility model, the second pipe 11 and the third pipe 12 are disposed opposite to each other on the side wall of the etching solution preparing tank 5 and are located at the upper end of the side wall of the etching solution preparing tank 5, and the third booster pump 14 and the second booster pump 9 are both disposed at the bottom of the etching solution preparing tank 5 at the liquid outlet position of the etching solution preparing tank 5. In order to make the measured value of the first concentration sensor 51 more accurate, it is understood that the first concentration sensor 51 is disposed at a position that should be as far away from the third booster pump 14 as possible and the second booster pump 9 is located at the liquid outlet of the corrosive liquid preparation tank 5. In order to achieve the above object, in the embodiment of the present utility model, the first concentration sensor 51 is provided near the inlet of the third pipe 12.
The filter structure 61 may employ various filter structures that are available for filtering rust products, such as: a high mesh filter screen and a sheet gap type filter structure. In the embodiment of the present utility model, in order to secure the filtering effect, the filtering structure 61 includes a filtering net 611 and a filtering sponge 612 disposed at a side of the filtering net 611 near the purified liquid storage chamber 63. The filter cotton 612 has a filtration accuracy of 2-5 microns.
The contaminated liquid storage chamber 62 and the purified liquid storage chamber 63 may be disposed in a left-right direction or in a top-bottom direction, and in order to improve the filtration efficiency, it is preferable that the contaminated liquid storage chamber 62 is located above the purified liquid storage chamber 63.
In order to facilitate the even mixing of the corrosive liquid in the corrosive liquid preparing tank 5 in the liquid preparing process, a stirring device 21 is also arranged in the corrosive liquid preparing tank 5. In the embodiment of the utility model, the stirring device 21 is also arranged in the corrosion liquid storage tank 4 with the designed concentration so as to further stir the corrosion liquid and fully mix the corrosion liquid.
To prevent accidents, such as: the overflow valve 71 does not work, and the first concentration sensor 51 fails, so that the accuracy of the test is affected, as shown in fig. 1, the utility model is further provided with a second concentration sensor 22, a pressure sensor 23 and an alarm 15, wherein the second concentration sensor 22 and the pressure sensor 23 are respectively arranged in the designed concentration corrosive liquid storage tank 4, the signal input ends of the second concentration sensor 22 and the pressure sensor 23 are respectively electrically connected with the signal input end of the controller 8, and the signal output end of the controller 8 is electrically connected with the signal input end of the alarm 15. In this way, the concentration of chloride ions in the corrosive liquid in the corrosive water tank 2 and the value of the corrosive liquid pressure in the corrosive water tank 2 can be monitored in real time through the second concentration sensor 22 and the pressure sensor 23 and transmitted to the controller, and when the concentration of chloride ions or/and the value of the corrosive liquid pressure exceed the design value, the controller sends an electric signal to the alarm 15, so that the alarm 15 alarms. This allows for a better monitoring of the corrosive liquid in the corrosive water tank 2.
Claims (8)
1. The utility model provides a lining structure corrosion test device with higher speed, includes design concentration corrosive liquid storage tank (4), high concentration corrosive liquid storage tank (10), controller (8), first booster pump (3), second booster pump (9), first concentration sensor (51) and seals corrosion water tank (2) that set up, design concentration corrosive liquid storage tank (4) communicate with corrosion water tank (2) through first booster pump (3), the signal output part of first concentration sensor (51) is connected with the signal input part electricity of controller (8), the signal output part of controller (8) is connected with the control signal input part electricity of second booster pump (9), its characterized in that: the device also comprises a corrosive liquid preparation box (5) and a filter box (6);
a filtering structure (61) for filtering rust products is arranged in the filtering box (6), and the filtering structure (61) divides the inner cavity of the filtering box (6) into a polluted liquid storage cavity (62) and a purified liquid storage cavity (63);
the corrosion water tank (2) is internally provided with a stirring device (21), the corrosion water tank (2) is communicated with a polluted liquid storage cavity (62) through a first pipeline (7), the first pipeline (7) is provided with an overflow valve (71), the purified liquid storage cavity (63) is communicated with a corrosion liquid preparation tank (5) through a second pipeline (11), and the corrosion liquid preparation tank (5) is communicated with a corrosion liquid storage tank (4) with designed concentration through a third pipeline (12);
the first concentration sensor (51) is arranged in the corrosive liquid preparation tank (5), and the high-concentration corrosive liquid storage tank (10) is communicated with the corrosive liquid preparation tank (5) through the second booster pump (9).
2. An accelerated corrosion testing device for lining structures as claimed in claim 1, wherein: the corrosion liquid treatment device is characterized by further comprising a tap water storage tank (13) and a third booster pump (14), wherein the tap water storage tank (13) is communicated with the corrosion liquid preparation tank (5) through the third booster pump (14), and the signal output end of the controller (8) is electrically connected with the control signal input end of the third booster pump (14).
3. An accelerated corrosion testing device for lining structures as claimed in claim 1, wherein: the filtering structure (61) comprises a filter screen (611) and a filter cotton (612) arranged on one side of the filter screen (611) close to the purified liquid storage cavity (63).
4. An accelerated corrosion testing device for lining structures as claimed in claim 1, wherein: the contaminated liquid storage chamber (62) is located above the purified liquid storage chamber (63).
5. A lining structure accelerated corrosion testing apparatus as claimed in claim 2, wherein: the second pipeline (11) and the third pipeline (12) are oppositely arranged on the side wall of the corrosive liquid preparation box (5), the third booster pump (14) and the second booster pump (9) are arranged at the bottom of the corrosive liquid preparation box (5) at the liquid outlet of the corrosive liquid preparation box (5), and the first concentration sensor (51) is arranged on one side of the inlet of the third pipeline (12).
6. An accelerated corrosion testing device for lining structures as claimed in claim 1, wherein: a stirring device (21) is also arranged in the corrosive liquid preparation box (5).
7. An accelerated corrosion testing device for lining structures as claimed in claim 1, wherein: and a stirring device (21) is also arranged in the corrosion solution storage tank (4) with the designed concentration.
8. An accelerated corrosion testing device for lining structures as claimed in claim 1, wherein: the corrosion-resistant water treatment device is characterized by further comprising a second concentration sensor (22), a pressure sensor (23) and an alarm (15), wherein the second concentration sensor (22) and the pressure sensor (23) are respectively arranged in the designed concentration corrosion liquid storage tank (4), signal input ends of the second concentration sensor (22) and the pressure sensor (23) are respectively electrically connected with signal input ends of a controller (8), and signal output ends of the controller (8) are electrically connected with signal input ends of the alarm (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222554697.XU CN219532860U (en) | 2022-09-26 | 2022-09-26 | Lining structure accelerated corrosion test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222554697.XU CN219532860U (en) | 2022-09-26 | 2022-09-26 | Lining structure accelerated corrosion test device |
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| Publication Number | Publication Date |
|---|---|
| CN219532860U true CN219532860U (en) | 2023-08-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222554697.XU Active CN219532860U (en) | 2022-09-26 | 2022-09-26 | Lining structure accelerated corrosion test device |
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| CN (1) | CN219532860U (en) |
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2022
- 2022-09-26 CN CN202222554697.XU patent/CN219532860U/en active Active
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