CN106990010A - Liquid erosion test device in a kind of many reference amounts regulation and control pipeline - Google Patents

Abstract

Liquid erosion test device in a kind of many reference amounts regulation and control pipeline.It includes the controllable corrosive liquid supplying module a of the pH value that is sequentially connected, corrosion flow quantity adjustable module b, the controllable module c of corrosion temperature and corrosive liquid reflux and filter module d；Liquid erosion test device is simple in construction in many reference amounts regulation and control pipeline that the present invention is provided, its corrosion sample is easy to process and changed, can be practical, this function of flowing erosion can be realized, more excellent experimental rig is provided for liquid erosion in research pipeline, it is easy to tube inner corrosion situation and mechanical property subsequently to the sample to study, it is adaptable to the technical field such as environmental protection, material corrosion research.

Description

A multi-parameter control pipeline liquid erosion test device

technical field

The invention belongs to the technical field of material corrosion research, and in particular relates to a temperature-controllable, pH-value-controllable and flow-adjustable multi-parameter regulating liquid erosion test device in a pipeline.

Background technique

Pipeline transportation of fluid has the advantages of high safety, convenience, and low cost, and is currently the most widely used method of fluid transportation. Nowadays, countries all over the world have an increasing demand for energy, and the pipeline transportation industry has developed very rapidly, and many large-scale large-scale oil pipeline networks and gas supply systems have been formed. However, since most of the transportation pipelines are buried underground, they will be corroded by external factors such as soil and groundwater and the internal transportation fluid, so the pipeline will leak and its service life will be greatly reduced, which will not only cause serious economic losses , will also cause environmental pollution problems. According to the survey of the Chinese Academy of Engineering, the total cost of corrosion in my country in 2014 was 2,127.82 billion yuan, accounting for about 3.34% of GDP in that year, which is equivalent to the corrosion cost of 1,555 yuan for each Chinese person in that year. Pipeline corrosion is a common problem faced by all countries in the world, involving safety, economy and ecological civilization, and has become one of the important factors affecting the sustainable development of national economy and society.

With the complexity and diversification of the application environment of pipe fittings, pipe fittings often bear the combined effect of internal fluid corrosion and external loads. The structure of the inner wall of the pipeline will be eroded by the erosion of the flowing liquid for a long time. At the same time, the pipeline components vibrate during the flight of the aircraft and will be subjected to dynamic loads, thereby forming corrosion cracks under the action of external forces and eventually causing leakage of the pipeline. Therefore, there is an urgent need for a sample shape suitable for subsequent mechanics. Inline erosion device for testing.

Although there are currently researches on corrosion devices, on the one hand, the corrosion treatment methods used are generally salt spray and immersion. These two methods cannot study the erosion and corrosion effect of flowing liquid on objects. The corrosion products will slow down the corrosion rate of the inner wall of the pipeline, but due to the flow of the liquid in the pipeline, some corrosion products will be taken away, thereby intensifying the corrosion of the inner wall of the pipeline, so the research on the corrosion of the inner wall of the pipeline by the fluid flow rate is particularly important. On the other hand, most of the existing erosion research and simulation samples are at the test piece level, which is not suitable for subsequent related mechanical tests.

Contents of the invention

In order to solve the above problems, the purpose of the present invention is to provide a multi-parameter control pipeline liquid erosion test device.

In order to achieve the above object, the multi-parameter control pipeline liquid erosion test device provided by the present invention includes a corrosive solution supply module a with controllable pH value, a corrosive solution flow adjustable module b, a corrosive temperature controllable module c and a corrosive solution connected in sequence. Liquid backflow filter module d; the corrosive liquid supply module a with controllable pH value includes a beaker filled with pH regulating liquid, a peristaltic pump, a first steady flow valve, a pH regulator, a constant temperature pot, and a beaker filled with corrosive liquid , PH controller probe and the first pipeline, wherein, the beaker filled with corrosive liquid is placed in the constant temperature pot; in the PH regulating liquid in the beaker of the liquid; the peristaltic pump is set on the first pipeline close to the beaker containing the PH regulating liquid; the first steady flow valve is set on the first pipeline close to the beaker containing the corrosive liquid; the pH control The instrument probe is placed in the corrosive liquid in the beaker containing the corrosive liquid, and is electrically connected to the pH regulator and the peristaltic pump through wires in turn;

The corrosive liquid flow adjustable module b includes several groups of corrosive liquid flow regulating systems connected in parallel, each group of corrosive liquid flow regulating systems includes a second pipeline and steplessly adjustable peristaltic pumps arranged sequentially on the second pipeline, the first Two steady flow valves and a flow meter, and one end of the second pipeline close to the stepless adjustment peristaltic pump is placed in the corrosive liquid in the beaker containing the corrosive liquid;

The corrosion temperature controllable module c includes several pipeline samples to be corroded, several temperature controller probes, several third pipelines and a temperature controller; the liquid inlet of each pipeline sample is connected to The other end of the second pipeline in a group of corrosive liquid flow regulation systems, the liquid outlet is connected to one end of a third pipeline; each pipeline sample is equipped with a temperature controller probe; the temperature controller is connected to several A temperature controller probe and a constant temperature pot are electrically connected;

The corrosive liquid return filter module d includes a fourth pipeline and at least one filter arranged on the fourth pipeline; one end of the fourth pipeline is set in a beaker filled with corrosive liquid, and the other end is connected to several third pipeline, and the location of the pipeline sample is higher than the beaker containing the corrosive solution.

When the number of filters in the corrosive liquid return filter module d is several, the several filters are arranged in series on the fourth pipeline.

The pipeline sample is made of transparent material so that the test personnel can observe the corrosion condition of the inner wall of the pipeline sample.

The multi-parameter control pipeline liquid erosion test device provided by the present invention has a simple structure, and its corrosion samples are easy to process and replace, and have strong practicability. The test device is convenient for subsequent research on the corrosion situation and mechanical properties of the sample in the pipe, and is suitable for environmental protection, material corrosion research and other technical fields.

Description of drawings

Fig. 1 is a schematic structural diagram of a multi-parameter control pipeline liquid erosion test device provided by the present invention.

detailed description

The multi-parameter control pipeline liquid erosion test device provided by the present invention will be described in detail below in conjunction with the accompanying drawings and specific examples:

As shown in Figure 1, the multi-parameter control pipeline liquid erosion test device provided by the present invention includes a corrosive solution supply module a with controllable pH value, a corrosive solution flow adjustable module b, a corrosive temperature controllable module c and a corrosive solution supply module connected in sequence. The corrosive liquid backflow filter module d; the corrosive liquid supply module a with controllable pH value includes a beaker 1 filled with a pH regulating liquid, a peristaltic pump 2, a first steady flow valve 3, a pH regulator 4, a constant temperature pot 5, The beaker 6 containing the corrosive liquid, the pH controller probe 7 and the first pipeline 15, wherein the beaker 6 containing the corrosive liquid is placed in the constant temperature pot 5; one end of the first pipeline 15 is set on the In the beaker 6, the other end is submerged in the pH adjusting liquid in the beaker 1 filled with the pH adjusting liquid; the peristaltic pump 2 is arranged on the first pipeline 15 near the beaker 1 filled with the pH adjusting liquid; the first steady flow The valve 3 is set on the first pipeline 15 close to the beaker 6 containing the corrosive liquid; the probe 7 of the pH controller is placed in the corrosive liquid in the beaker 6 containing the corrosive liquid, and is sequentially connected with the pH controller 4 through wires. And the peristaltic pump 2 is electrically connected;

The corrosive liquid flow adjustable module b includes several groups of corrosive liquid flow regulation systems connected in parallel, and each group of corrosive liquid flow regulation systems includes a second pipeline 16 and a stepless adjustment peristaltic system sequentially arranged on the second pipeline 16 The pump 8, the second steady flow valve 9 and the flow meter 10, and the end of the second pipeline 16 close to the stepless adjustment peristaltic pump 8 is placed in the corrosive solution in the beaker 6 containing the corrosive solution;

The corrosion temperature controllable module c includes several pipeline samples 11 to be corroded, several temperature controller probes 12, several third pipelines 17 and a temperature controller 13; The liquid inlet is connected to the other end of the second pipeline 16 in a group of corrosive liquid flow regulation systems, and the liquid outlet is connected to one end of a third pipeline 17; each pipeline sample 11 is provided with a temperature control instrument probe Needle 12; temperature controller 13 is electrically connected with several temperature controller probes 12 and thermostatic pot 5 at the same time;

The corrosive liquid return filter module d includes a fourth pipeline 18 and at least one filter 14 arranged on the fourth pipeline 18; one end of the fourth pipeline 18 is arranged in the beaker 6 containing the corrosive liquid, and the other One end is connected to several third pipelines 17, and the pipeline sample 11 is set higher than the beaker 6 containing the corrosive liquid.

When the number of filters 14 in the corrosive liquid return filter module d is several, the several filters 14 are arranged in series on the fourth pipeline 18 .

The pipeline sample 11 is made of transparent material so that the test personnel can observe the corrosion condition of the inner wall of the pipeline sample 11 .

Now the method for using the liquid erosion test device in the multi-parameter control pipeline provided by the present invention is set forth as follows:

Firstly, according to the number of pipeline samples 11 to be corroded, the staff opens the corresponding number of stepless adjustment peristaltic pumps 8 connected thereto, thereby passing the corrosive liquid in the beaker 6 containing the corrosive liquid through the second pipeline 16 and After the flow is stabilized by the second flow stabilization valve 9 and measured by the flow meter 10, it is provided to the inside of the pipeline sample 11 to be corroded, and the flow rate of the corrosion solution can be kept at a certain set value by controlling the stepless adjustment of the peristaltic pump 8 , and displayed by the flow meter 10; inside the pipeline sample 11, the corrosive liquid will react with the inner wall of the pipeline sample 11, and then the reacted corrosive liquid will flow into the fourth pipeline through the third pipeline 17 depending on the potential energy 18. The filter 14 arranged on the fourth pipeline 18 filters the impurities in the reacted corrosion solution, and finally flows back into the beaker 6 containing the corrosion solution. Since the corrosive reaction between the corrosive liquid and the pipeline sample 11 occurs, the pH value of the corrosive liquid in the beaker 6 containing the corrosive liquid will change, thereby deviating from the predetermined range. During this process, the pH controller probe 7 will detect the pH value of the corrosion solution in the beaker 6 containing the corrosion solution in real time and transmit the detection data to the pH controller 4, and then the pH controller 4 will control the peristaltic pump according to the above detection results 2 start or stop; when the pH value of the corrosion solution in the beaker 6 containing the corrosion solution exceeds the predetermined range, start the peristaltic pump 2, and at this time the peristaltic pump 2 will suck the pH adjustment in the beaker 1 containing the pH adjustment solution liquid, and inject it into the beaker 6 containing the corrosive liquid through the first steady flow valve 3 through the first pipeline 15 until the pH value of the corrosive liquid in the beaker 6 containing the corrosive liquid returns to the set range. The peristaltic pump 2 stops working, so that the pH value of the corrosion solution can be kept constant. When the pH of the corrosion solution in the beaker 6 containing the corrosion solution is within a predetermined range, the peristaltic pump 2 is not started.

As the corrosion reaction progresses, the probe 12 of the temperature controller installed in the pipeline sample 11 will detect the temperature of the corrosion solution in real time, and transmit the corresponding detection data to the temperature controller 13 . If the temperature deviates from the predetermined range, the temperature controller 13 will automatically adjust the temperature of the constant temperature pot 5 while sending an alarm signal, thereby changing the temperature of the corrosive liquid in the beaker 6 containing the corrosive liquid, and the corrosive liquid passes through the corrosive liquid flow adjustable module b then flows into the pipeline sample 11, thus indirectly regulating the temperature of the corrosive liquid in the pipeline sample 11.

The above-mentioned embodiments only express the specific implementation manner of the present invention according to the accompanying drawings, and the description thereof is relatively specific and detailed, but should not be construed as a limitation of the patent scope of the present invention.

Claims (3)

1. liquid erosion test device in a kind of many reference amounts regulation and control pipeline, it is characterised in that：In described many reference amounts regulation and control pipeline Liquid erosion test device includes the controllable corrosive liquid supplying module a of the pH value that is sequentially connected, corrosion flow quantity adjustable module The controllable module c of b, corrosion temperature and corrosive liquid reflux and filter module d；The controllable corrosive liquid supplying module a bags of described pH value Include and fill the PH regulations beaker (1) of liquid, peristaltic pump (2), the first flow stabilizing valve (3), PH adjusting and control instruments (4), constant temperature pot (5), fill corruption Beaker (6), PH adjusting and control instruments probe (7) and the first pipeline (15) of liquid are lost, wherein, the beaker (6) for filling corrosive liquid is placed on perseverance In warm pot (5)；One end of first pipeline (15) is arranged in the beaker (6) for filling corrosive liquid, and the other end, which is immersed in, fills PH tune Save in the PH regulation liquid in the beaker (1) of liquid；Peristaltic pump (2) is arranged on the first pipeline (15) close to the burning for filling PH regulation liquid Cup (1) place；First flow stabilizing valve (3) is arranged on the first pipeline (15) close to beaker (6) place for filling corrosive liquid；PH adjusting and control instruments are visited Pin (7) is placed in the corrosive liquid in the beaker (6) for filling corrosive liquid, and by wire successively with PH adjusting and control instruments (4) and compacted Dynamic pump (2) electrical connection；

Described corrosion flow quantity adjustable module b includes some groups of corrosive liquid flow control systems parallel with one another, and every group rotten Erosion flow quantity regulating system includes the second pipeline (16) and the step-less adjustment peristaltic pump being successively set on the second pipeline (16) (8), put on the second flow stabilizing valve (9) and flowmeter (10), and the second pipeline (16) close to one end of step-less adjustment peristaltic pump (8) It is placed in the corrosive liquid in the beaker (6) for filling corrosive liquid；

The controllable module c of described corrosion temperature includes several Piping specimens (11) to be corroded, several temperature controllers and visited Pin (12), some articles of the 3rd pipelines (17) and a temperature controller (13)；The inlet of each Piping specimen (11) is connected to The other end of second pipeline (16), liquid outlet and one end phase of one article of the 3rd pipeline (17) in one group of corrosive liquid flow control system Even；Provided with a temperature controller probe (12) in each Piping specimen (11)；Temperature controller (13) is while warm with several Spend controller probe (12) and constant temperature pot (5) electrical connection；

Described corrosive liquid reflux and filter module d include the 4th pipeline (18) and be arranged on the 4th pipeline (18) at least one Filter (14)；One end of 4th pipeline (18) is arranged in the beaker (6) for filling corrosive liquid, and the other end connects some articles the 3rd Pipeline (17), and the set location of Piping specimen (11) is higher than the beaker (6) for filling corrosive liquid.

2. liquid erosion test device in many reference amounts regulation and control pipeline according to claim 1, it is characterised in that：Described corruption When the quantity for losing filter (14) in liquid reflux and filter module d is several, several filters (14) are set using series system Put on the 4th pipeline (18).

3. liquid erosion test device in many reference amounts regulation and control pipeline according to claim 1, it is characterised in that：Described pipe Road sample (11) uses transparent material, in order to which testing crew observes the corrosion condition of Piping specimen (11) inwall.