CN113466118B

CN113466118B - Corrosion test device for petroleum conveying equipment

Info

Publication number: CN113466118B
Application number: CN202110753011.7A
Authority: CN
Inventors: 刘致远; 张亮亮; 何维民
Original assignee: Lanzhou City University
Current assignee: Lanzhou City University
Priority date: 2021-07-02
Filing date: 2021-07-02
Publication date: 2023-04-28
Anticipated expiration: 2041-07-02
Also published as: CN113466118A

Abstract

The invention discloses a corrosion test device for petroleum conveying equipment, which comprises a tank body filled with a corrosion solution, wherein a circulating spray system is arranged above the tank body and used for extracting the corrosion solution in the tank body and facing downwards Fang Penlin, the corrosion test device also comprises more than one set of thermal circulation system, the thermal circulation system comprises a thermal inlet pipe and a thermal outlet pipe which are communicated with a heat supply source, the thermal inlet pipe and the thermal outlet pipe are arranged below the circulating spray system, a plurality of petroleum conveying pipes to be tested are arranged between the thermal inlet pipe and the thermal outlet pipe in parallel, during the test, the thermal inlet pipe and the thermal outlet pipe are matched to circularly supply heat to the petroleum conveying pipes, and the petroleum conveying pipes heated and heated are all sprayed by the corrosion solution above to develop the corrosion test. The invention has the advantages of simple and compact structure, convenient and quick operation, high working efficiency, strong adaptability, good test effect and low cost.

Description

Corrosion test device for petroleum conveying equipment

Technical Field

The invention mainly relates to the technical field of maintenance of petroleum conveying pipelines, in particular to a corrosion test device for petroleum conveying equipment.

Background

Corrosion is the degradation and destruction of a material by chemical or electrochemical action occurring in the medium of the environment in which it is located. In petrochemical production, in order to ensure long-term stable operation of the device and reduce heat loss, the surfaces of pipelines, containers and other equipment are generally coated with anti-corrosion coatings, and heat preservation protection is carried out by adopting a heat preservation protection layer, so that corrosion of the outer surfaces of the equipment under the coating heat preservation protection layer occurs.

Although these protective layer under-line equipment design lives are all 30-50 years, long-term corrosion under the protective layer has led to concerns about its practical safe and effective life. In extreme cases, corrosion can lead to significant catastrophic events leading to casualties. Limited by objective conditions, the insulation protection layer cannot be removed in advance for real-time monitoring, and the severity of the corrosion phenomenon is difficult to be predicted. The corrosion prevention safety evaluation of underground oil and gas pipelines of tens of thousands of kilometers is a necessary but difficult work to accurately realize.

At present, many oil pipelines and other equipment in oil refineries in China are in service for more than 50 years, and a standard corrosion detection and evaluation system is not formed on the outer surface of the equipment, so that a professional corrosion simulation device is not provided. How does the degree of corrosion resistance to be? What is corrosion to what extent is probably present? These problems are all the more urgent to be solved. However, the corrosion test work of the existing petroleum conveying equipment has the following technical problems:

firstly, the real working condition of corrosion of the outer surface of the refinery pipeline under the protective layer cannot be accurately realized.

Secondly, research discovers that the coating heat-insulating protective layer on the surface has certain corrosiveness in the long-term operation process of oil and gas pipelines, containers or other equipment. Meanwhile, the porous structure of the porous material forms larger surface area and capillary effect, so that electrochemical corrosion and other medium corrosion are generated. This corrosion occurs in the range of 0-120 c, and different temperature values may cause different corrosion phenomena, whereas the corrosion rate is significantly increased when the temperature is higher than 60 c. However, the prior art cannot realize corrosion tests at different temperatures (especially high temperatures for a long time), resulting in low accuracy of test results.

And the corrosion test device in the prior art has low working efficiency and poor adaptability, and can not simultaneously and rapidly perform corrosion tests on multiple pipelines with different pipe diameters, different materials, different coatings and heat preservation protective layers.

Fourth, the test work efficiency is too low. It is well known that oil transportation pipelines are numerous, each of which has an extremely long length, and the same pipeline may traverse areas of different climates and different landforms, so that it is necessary to test a plurality of different test pipelines (different pipelines, different sections of the same pipeline, etc.) at the same time and because corrosion tests are generally relatively long in period, a set of equipment is needed to efficiently and rapidly complete the special corrosion test operation.

Fifth, the flexibility of the test is poor. The corrosion test of petroleum transportation equipment requires a real simulation of different environments, thus involving different test temperatures, different spray effects (spray forces, spray ranges, etc.), which the prior art cannot meet.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide the corrosion test device for the petroleum conveying equipment, which has the advantages of simple and compact structure, convenient and quick operation, high working efficiency, strong adaptability, good test effect and low cost.

In order to solve the technical problems, the invention adopts the following technical scheme:

the utility model provides a corrosion test device for oil conveying equipment, includes the cell body that is equipped with corrosion solution, the top of cell body is equipped with circulation spray system, is used for extracting corrosion solution in the cell body and Fang Penlin down, still includes the thermal cycle system of more than one set, thermal cycle system includes heat inlet tube and the hot exit tube with the heat supply intercommunication, heat inlet tube and hot exit tube locate circulation spray system's below, be used for parallelly connected installation many oil conveying pipes that wait to test between heat inlet tube and the hot exit tube, during the test heat inlet tube and hot exit tube cooperate towards many oil conveying intraductal circulation heat supply, be used for making many oil conveying pipes after the heating temperature rise all receive the spraying of top corrosion solution in order to develop corrosion test.

As a further improvement of the invention, the heat supply source comprises a water heater, the water heater heats the water transmitted by the heat outlet pipe and then transmits the heated water to a plurality of petroleum conveying pipes through the heat inlet pipe so as to carry out cyclic heating and temperature rise, the heat inlet pipe is provided with a temperature sensor for monitoring the water temperature in the pipes, and the temperature sensor is in communication connection with the water heater and is used for controlling the water heater to automatically regulate the temperature through real-time monitoring.

As a further improvement of the invention, more than two sets of thermal circulation systems are provided, and each set of thermal circulation system is used for independently controlling the heating temperature so as to carry out corrosion tests at different temperatures.

As a further improvement of the invention, a plurality of pipeline adapters are arranged on the hot inlet pipe and the hot outlet pipe and are used for communicating and installing petroleum conveying pipes with different pipe diameters between the hot inlet pipe and the hot outlet pipe, each pipeline adapter comprises a plurality of hollow connecting rings with different outer diameters and is used for forming detachable communication from small to large in sequence, a circle of sealing slots are arranged at the rear end of each connecting ring, a circle of inserting pipe parts are arranged at the front end of each connecting ring, and the inserting pipe parts are used for being inserted into the petroleum conveying pipes to be communicated with the petroleum conveying pipes or used for being inserted into the sealing slots of the previous connecting ring so as to enable two adjacent connecting rings to be communicated.

As a further improvement of the invention, an elastic sealing element is arranged in each sealing slot.

As a further improvement of the invention, a plurality of convex branch pipes are arranged on the hot inlet pipe and the hot outlet pipe, and the branch pipes are used for being inserted into the sealing slots of the connecting ring with the largest outer diameter so as to install and connect the connecting ring.

As a further improvement of the invention, the circulating spraying system comprises a conveying pump, a liquid conveying pipe and a plurality of spraying pipes, wherein the spraying pipes are sequentially paved above the tank body, the conveying pump is communicated between the tank body and the spraying pipes through the liquid conveying pipe, and each spraying pipe is provided with a plurality of nozzle assemblies for spraying corrosive solution to the downward petroleum conveying pipe.

As a further improvement of the invention, each nozzle assembly comprises a matched electromagnetic valve and a nozzle, the nozzle can adjust the size of the injection range, and the electromagnetic valve is used for controlling the opening and closing of the nozzle or controlling the injection force.

As a further improvement of the invention, a solution supplementing system is also provided, the solution supplementing system comprises an etching solution tank, a transmission pipe and an electronic float valve, the etching solution tank is communicated with the tank body through the transmission pipe, and the electronic float valve is arranged in the tank body and used for monitoring the etching solution amount in the tank body in real time so as to control the etching solution tank to supplement the etching solution into the tank body.

As a further improvement of the invention, the oil pipe test device further comprises a plurality of annular isolation plate assemblies, each isolation plate assembly comprises an upper plate and a lower plate which are detachably connected, protruding bolts are arranged at two end parts of the upper plate, grooves for enabling the bolts to be inserted into and clamped with are formed in two end parts of the lower plate, and the isolation plate assemblies are clamped and installed on an oil conveying pipe in a test and used for isolating test sections with different coatings or different protective layers on the oil conveying pipe.

Compared with the prior art, the invention has the advantages that:

the corrosion test device for the petroleum conveying equipment has good test effect, and can accurately realize the real working condition of corrosion of the outer surface of the refinery pipeline under the protective layer. Through multiple tests and analysis, the invention can be used for carrying out corrosion tests, and the long-period corrosion effect of pipe sections with different materials under different coating and heat-insulating layer materials can be obtained in a short time. If the corrosion test is continuously carried out on the refinery pipeline under the protective layer for three months, the corrosion test approximates to the corrosion result of the refinery pipeline under the actual heat insulation layer for about 5 years.

The corrosion test device for the petroleum conveying equipment can form circulation heat supply, so that the spray test is carried out after the petroleum conveying pipes 4 are heated and warmed, and the corrosion phenomena possibly caused by different temperature values can be simulated, namely, the corrosion test at different temperatures (especially long-time high temperature) is realized, and the test effect is good, the test range is wide and the result accuracy is high.

The corrosion test device for the petroleum conveying equipment has strong adaptability and high working efficiency, and can simultaneously perform rapid corrosion tests on various pipelines with different pipe diameters, different materials, different coatings, heat preservation and protection layers, different lines and different sections.

And fourthly, the corrosion test device for the petroleum conveying equipment is designed with the pipeline adapter with the connecting rings with different outer diameters, so that petroleum conveying pipes with different pipe diameters can be quickly communicated and installed between the hot inlet pipe and the hot outlet pipe, and the device is high in adaptability and high in working efficiency.

Drawings

FIG. 1 is a schematic top view of the corrosion test apparatus for petroleum transportation equipment according to the present invention.

Fig. 2 is a schematic diagram of a side view of a corrosion test apparatus for petroleum transportation equipment according to the present invention.

FIG. 3 is a schematic top view of the corrosion test apparatus according to the present invention, in which only the thermal cycle system is installed.

FIG. 4 is a schematic top view of the corrosion test apparatus of the present invention with only the circulation shower system installed.

FIG. 5 is a schematic diagram showing the principle of a top view structure of the corrosion test apparatus of the present invention when a small diameter petroleum transportation pipe is installed.

FIG. 6 is a schematic diagram showing the principle of a top view structure of the corrosion test apparatus of the present invention when a large-diameter petroleum transportation pipe is installed.

Fig. 7 is a schematic view of the perspective construction principle of the pipe adapter of the present invention when disassembled.

Fig. 8 is a schematic perspective view of the pipe adapter of the present invention when installed in combination.

Fig. 9 is a schematic perspective view of the principle of the structure of the partition plate assembly of the present invention when assembled.

Fig. 10 is a schematic perspective view of the separator assembly of the present invention in a disassembled state.

The reference numerals in the drawings denote:

1. a cell body; 2. a circulating spray system; 21. a transfer pump; 22. an infusion tube; 23. a shower pipe; 231. a nozzle assembly; 3. a thermal circulation system; 31. a water heater; 32. a hot inlet pipe; 321. a temperature sensor; 33. a hot-water outlet pipe; 34. a pipe adaptor; 341. a connecting ring; 3411. sealing the slot; 3412. a cannula part; 35. a branch pipe; 4. a petroleum delivery pipe; 5. a solution replenishment system; 51. an etching solution tank; 52. a transmission tube; 53. an electronic float valve; 6. a separator assembly; 61. an upper plate; 611. a plug pin; 62. a lower plate; 621. a groove.

Detailed Description

The invention will be described in further detail with reference to the drawings and the specific examples.

As shown in fig. 1 to 10, the invention provides a corrosion test device for petroleum transportation equipment, which comprises a tank body 1 filled with a corrosion solution, a circulating spray system 2 arranged above the tank body 1 and used for extracting the corrosion solution in the tank body 1 and spraying downwards, and more than one set of thermal circulation system 3, wherein the thermal circulation system 3 comprises a thermal inlet pipe 32 and a thermal outlet pipe 33 which are communicated with a heat supply source, the thermal inlet pipe 32 and the thermal outlet pipe 33 are arranged below the circulating spray system 2, a plurality of petroleum transportation pipes 4 to be tested are arranged between the thermal inlet pipe 32 and the thermal outlet pipe 33 in parallel, during the test, the thermal inlet pipe 32 and the thermal outlet pipe 33 are matched to supply heat to the plurality of petroleum transportation pipes 4 in a circulating way, and the plurality of petroleum transportation pipes 4 after heating are all subjected to spraying of the corrosion solution above so as to perform the corrosion test. In this example, the cell body 1 was assembled and welded with 316L stainless steel plates, and filled with a sufficient amount of 5% brine as the corrosion solution for the test, although other corrosion test solutions may be used instead in other examples. A bracket rod is also arranged above the corrosive solution in the tank body 1 and is used for supporting a plurality of petroleum conveying pipes 4 to be tested. The specific implementation principle is as follows:

before the test, a worker may install a plurality of petroleum delivery pipes 4 to be tested in parallel between the heat inlet pipe 32 and the heat outlet pipe 33, so that the heat inlet pipe 32 is communicated with the head ends of the plurality of petroleum delivery pipes 4, and the heat outlet pipe 33 is communicated with the tail ends of the plurality of petroleum delivery pipes 4. These multiple oil delivery pipes 4 to be tested may be intercepted pipes of different pipe diameters, intercepted pipes of different coatings and thermal insulation protection layers, intercepted pipes of different lines, intercepted pipes of different sections of the same line, etc. After the installation, the heat inlet pipe 32 supplies heat from a heat supply source, is input into the plurality of petroleum conveying pipes 4 to be tested, and flows back to the heat supply source from the heat outlet pipe 33 to form circulation heat supply, so that the plurality of petroleum conveying pipes 4 are heated to raise the temperature. The heat supply source supplies heat, such as hot water, hot gas or the like, and the temperature is adjustable. At the same time, the thermal cycle system 3 starts to operate, and the corrosive solution in the tank body 1 is extracted and sprayed to the plurality of petroleum delivery pipes 4 at the lower side. In the process, in order to simulate the damage condition of the thermal insulation protective layer, 3 holes with diameter of 5mm can be uniformly drilled on the outer surface of the protective layer of the petroleum conveying pipe 4 along the radial direction, and two rows of holes are formed in each section. The drilled holes pass through the heat insulation protective layer, so that the corrosive solution directly flows to the outer surface of the pipeline, flows in from the upper two holes and flows out from the lower holes, and thus, the corrosive solution can completely infiltrate the outer surface of the coating or the pipeline, and the effect is better. After the proper time of operation, the test was stopped, and each of the above-described petroleum transfer pipes 4 was subjected to corrosion analysis. Through the special scientific design, the method has the following technical advantages:

Further, in the preferred embodiment, the heat supply source comprises a water heater 31, the water heater 31 heats the water conveyed from the heat outlet pipe 33 and then conveys the heated water into the plurality of petroleum conveying pipes 4 through the heat inlet pipe 32 for cyclic heating and temperature rising, the heat inlet pipe 32 is provided with a temperature sensor 321 for monitoring the water temperature in the pipes, and the temperature sensor 321 is in communication connection with the water heater 31 for controlling the water heater 31 to automatically regulate the temperature through real-time monitoring. The temperature sensor measures the temperature of water in the test tube, and the water temperature is controlled to be kept at 60-80 ℃ and 80-100 ℃ (which can be set according to the test requirement). The automatic control system controls the automatic heating of the water temperature, and when the temperature of the circulating water is lower than the design low temperature, the automatic control system automatically starts heating, and when the temperature of the circulating water is higher than the design high temperature, the automatic control system automatically stops heating, so that the system temperature is kept within the design constant range, the energy is saved, the environment is protected, and the working cost is greatly reduced due to the hot water circulation mode.

Further, in the preferred embodiment, there are more than two sets of thermal cycling systems 3, each set of thermal cycling systems 3 independently controlling the heating temperature for conducting corrosion tests at different temperatures. The same tank body 1 and the same set of circulating spraying system 2, but more than two sets of thermal circulating systems 3, the temperature of the petroleum conveying pipes 4 of the thermal circulating systems 3 is different (different environments are simulated), so that the corrosion test can be simultaneously carried out on the petroleum conveying pipes 4 with different temperatures, namely, the synchronous rapid corrosion test with different temperatures (environments) is further satisfied while the requirements of various pipelines with different pipe diameters, different materials, different coatings, heat preservation protective layers, different lines and different sections are satisfied.

Further, in the preferred embodiment, the hot inlet pipe 32 and the hot outlet pipe 33 are provided with a plurality of pipe adapters 34 for connecting and installing the petroleum delivery pipes 4 with different diameters between the hot inlet pipe 32 and the hot outlet pipe 33, each pipe adapter 34 comprises a plurality of hollow connecting rings 341 with different outer diameters, the connecting rings 341 are used for forming detachable connection from small to large in sequence, the rear end of each connecting ring 341 is provided with a circle of sealing slot 3411, the front end of each connecting ring 341 is provided with a circle of inserting pipe 3412, and the inserting pipe 3412 is used for being inserted into the petroleum delivery pipe 4 to be communicated with the petroleum delivery pipe 4 or is used for being inserted into the sealing slot 3411 of the previous connecting ring 341 so as to enable the adjacent two connecting rings 341 to be communicated. The principle is as follows: in order to communicatively mount the petroleum delivery pipe 4 of different pipe diameters between the hot inlet pipe 32 and the hot outlet pipe 33, the present invention further designs a pipe adapter 34. Taking fig. 6, 7, 8, and 9 as an example, in this embodiment, the pipe adapter 34 includes three hollow connecting rings 341 with different outer diameters from large to small.

As shown in fig. 7, when it is necessary to connect with the petroleum pipe 4 of the largest pipe diameter, the rear end of the largest connecting ring 341 is fixed to the heat inlet pipe 32 (welding, screwing, etc. may be adopted to ensure sealing, sealant may be further applied to the connection), and then the insertion pipe 3412 of the front end of the connecting ring 341 is inserted into the petroleum pipe 4 to form connection and fixed (the connection fixing manner is various, such as welding, screwing, etc. may be adopted to ensure sealing, sealant may be further applied to ensure sealing), which causes the heat inlet pipe 32 to communicate with the petroleum pipe 4 of the largest pipe diameter. The connection of the other end of the oil delivery pipe 4 and the hot pipe 33 also operates as above. Insertion of the cannula 3412 may provide a good connection support.

As shown in fig. 6, when it is necessary to connect with a petroleum delivery pipe 4 with a minimum pipe diameter, the rear end of the largest connecting ring 341 is fixed on the heat inlet pipe 32 (welding, screw-in or the like may be adopted, and sealant may be further applied to ensure sealing), and then the insertion tube 3412 at the front end of the connecting ring 341 is inserted into the sealing slot 3411 at the rear end of the second largest connecting ring 341, and the two connecting rings 341 are connected and fixed (various connecting and fixing manners, such as welding, screw-in or the like may be adopted, and sealant may be further applied to ensure sealing). Then, the insertion tube 3412 at the front end of the second largest connecting ring 341 is inserted into the sealing slot 3411 at the rear end of the smallest connecting ring 341 and the two connecting rings 341 are connected and fixed (the connection fixing manner is various, for example, welding or sleeving screw and the like can be adopted, and sealing glue can be further applied for ensuring sealing), and then the insertion tube 3412 at the front end of the smallest connecting ring 341 is inserted into the petroleum conveying pipe 4 and connected and fixed (the connection fixing manner is various, for example, welding or sleeving screw and the like can be adopted, and sealing glue can be further applied for ensuring sealing), so that the thermal inlet pipe 32 is also communicated with the petroleum conveying pipe 4 with the smallest pipe diameter. The connection of the other end of the oil delivery pipe 4 and the hot pipe 33 also operates as above. Through the pipeline adapter 34 of the go-between 341 that designs simultaneously has a plurality of different external diameters for can all quick intercommunication of different pipe diameters's petroleum conveying pipe 4 is installed between heat advance pipe 32 and heat exit tube 33, make this device strong adaptability, work efficiency height. Namely, between the heat inlet pipe 32 and the heat outlet pipe 33, the petroleum conveying pipes 4 with different pipe diameters can be installed at one time, and then the petroleum conveying pipes 4 with different pipe diameters are tested together, so that the adaptability of the device is greatly improved, the testing working efficiency is greatly improved, and the testing period is greatly shortened.

Further, in the preferred embodiment, a resilient seal is provided within each seal slot 3411. Sealing can be further ensured.

Further, in the preferred embodiment, the hot inlet pipe 32 and the hot outlet pipe 33 are each provided with a plurality of protruding branch pipes 35, and the branch pipes 35 are inserted into the sealing insertion grooves 3411 of the connecting ring 341 having the largest outer diameter to mount and connect the connecting ring 341. This facilitates a stable installation of the connection ring 341 as the most basic.

Further, in the preferred embodiment, the circulating spray system 2 includes a delivery pump 21, a delivery pipe 22 and a plurality of spray pipes 23, the plurality of spray pipes 23 are sequentially laid on the upper side of the tank body 1, the delivery pump 21 is communicated between the tank body 1 and the plurality of spray pipes 23 through the delivery pipe 22, and each spray pipe 23 is provided with a plurality of nozzle assemblies 231 for spraying the corrosive solution to the petroleum delivery pipe 4 below. The transfer pump 21 is an industrial corrosion-resistant pump, and can flexibly adjust test parameters such as the concentration of the corrosion solution.

Further, in the preferred embodiment, each nozzle assembly 231 includes a cooperating solenoid valve and nozzle, the nozzle being adjustable in spray range size, the solenoid valve being used to control the nozzle opening and closing or to control the spray force. The adaptability of the device is further enhanced, different simulation environments can be formed by adjusting and controlling the size and the spraying force of the spraying range, and various corrosion tests can be carried out at the same time.

Further, in the preferred embodiment, a solution supplementing system 5 is further provided, the solution supplementing system 5 comprises an etching solution tank 51, a transmission pipe 52 and an electronic float valve 53, the etching solution tank 51 is communicated with the tank body 1 through the transmission pipe 52, and the electronic float valve 53 is arranged in the tank body 1 and is used for monitoring the amount of etching solution in the tank body 1 in real time so as to control the etching solution tank 51 to supplement the etching solution into the tank body 1. Because the corrosion solution (such as brine) can evaporate and reduce in long-term spraying work, in order to ensure the recycling of the brine, by arranging the solution supplementing system 5, when the brine amount in the tank is lower than the set liquid level, the signal is transmitted to the corrosion solution tank 51 through the electronic float valve 53, and then the water supplementing pump is automatically controlled to supplement water to the brine tank through the corrosion solution tank 51, thus the problem that the system cannot run for a long time due to water shortage can be avoided, the uninterrupted development of the test is satisfied, and the precision is effectively ensured. Monitoring equipment can also be installed above the whole system, and the running condition of the system can be monitored in real time through a remote control.

Further, in the preferred embodiment, the oil pump further comprises a plurality of annular isolation plate assemblies 6, each isolation plate assembly 6 comprises an upper plate 61 and a lower plate 62 which are detachably connected, protruding bolts 611 are arranged at two ends of the upper plate 61, grooves 621 which enable the bolts 611 to be inserted into the clamping grooves are formed in two ends of the lower plate 62, and the isolation plate assemblies 6 are installed on the oil conveying pipe 4 in a clamping mode during testing and are used for separating test sections with different coatings or different protective layers on the oil conveying pipe 4. In the previous embodiment, each of the oil delivery pipes 4 installed in parallel between the hot inlet pipe 32 and the hot outlet pipe 33 may have a different coating or a different protective layer, so that no interference is formed between different pipes. By arranging the partition plate assembly 6, test sections with different coatings or different protective layers can be arranged on the same petroleum conveying pipe 4, and the test sections can be separated only by using the partition plate assembly 6, so that interference between the different test sections can not be formed, and the authenticity and the accuracy of the test can be effectively ensured (as shown in fig. 6 and 7, four different test sections with different coatings or different protective layers are arranged). That is, the device enables one petroleum conveying pipe 4 to carry out various tests, which further greatly improves the working efficiency and adaptability of the tests, so that the device can carry out a great number of different tests at the same time. And the special designs of the upper plate 61 and the lower plate 62 make the disassembly convenient and quick.

While the invention has been described in terms of preferred embodiments, it is not intended to be limiting. Many possible variations and modifications of the disclosed technology can be made by anyone skilled in the art, or equivalent embodiments with equivalent variations can be made, without departing from the scope of the invention. Therefore, any simple modification, equivalent variation and modification of the above embodiments according to the technical substance of the present invention shall fall within the scope of the technical solution of the present invention.

Claims

1. A corrosion test device for petroleum transportation equipment, characterized in that: including cell body (1) that is equipped with corrosion solution, the top of cell body (1) is equipped with circulation spray system (2), is used for extracting corrosion solution in cell body (1) and sprays towards the below, still includes thermal cycle system (3) more than one set, thermal cycle system (3) include thermal inlet tube (32) and thermal outlet tube (33) with the heat supply intercommunication, all be equipped with a plurality of pipeline adapters (34) on thermal inlet tube (32) and thermal outlet tube (33) to be used for with oil conveying pipe (4) intercommunication of different pipe diameters install between thermal inlet tube (32) and thermal outlet tube (33), the heat supply includes a water heater (31), water heater (31) are with thermal outlet tube (33) transmission after the water heating that comes through thermal inlet tube (32) spray in order to carry out circulation heating intensification in many oil conveying pipes (4), thermal inlet tube (32) and thermal outlet tube (33) locate the below of circulation system (2), thermal inlet tube (32) and thermal outlet tube (33) are used for waiting to install between thermal inlet tube (33) and thermal outlet tube (4) and are used for carrying out the test with the many thermal inlet tube (4) of the heat supply of oil conveying pipe (33) and are carried out the heat of the heat supply of many heat supply system (4) and are carried out the heat test of the heat supply of the water heater (31) after the water heating.

2. The corrosion test apparatus for petroleum transportation equipment according to claim 1, wherein: the water heater is characterized in that a temperature sensor (321) for monitoring the water temperature in the pipe is arranged on the heat inlet pipe (32), and the temperature sensor (321) is in communication connection with the water heater (31) and is used for controlling the water heater (31) to automatically regulate the temperature through real-time monitoring.

3. The corrosion test apparatus for petroleum transportation equipment according to claim 1, wherein: more than two sets of thermal circulation systems (3) are arranged, and each set of thermal circulation system (3) is used for independently controlling the heating temperature so as to be used for carrying out corrosion tests at different temperatures.

4. The corrosion test apparatus for petroleum transportation equipment according to claim 1, wherein: each pipeline adapter (34) comprises a plurality of hollow connecting rings (341) with different outer diameters and is used for forming detachable communication from small to large in sequence, a circle of sealing slots (3411) are formed in the rear end of each connecting ring (341), a circle of inserting pipe portions (3412) are formed in the front end of each connecting ring (341), and the inserting pipe portions (3412) are used for being inserted into the petroleum conveying pipe (4) to be communicated with the petroleum conveying pipe (4) or used for being inserted into the sealing slots (3411) of the previous connecting ring (341) to enable two adjacent connecting rings (341) to be communicated.

5. The corrosion test apparatus for petroleum transportation equipment according to claim 4, wherein: an elastic sealing piece is arranged in each sealing slot (3411).

6. The corrosion test apparatus for petroleum transportation equipment according to claim 4, wherein: the hot inlet pipe (32) and the hot outlet pipe (33) are respectively provided with a plurality of protruding branch pipes (35), and the branch pipes (35) are used for being inserted into sealing slots (3411) of the connecting ring (341) with the largest outer diameter so as to install and connect the connecting ring (341).

7. The corrosion test apparatus for petroleum transportation equipment according to claim 1, wherein: the circulating spray system (2) comprises a conveying pump (21), a liquid conveying pipe (22) and a plurality of spray pipes (23), wherein the spray pipes (23) are sequentially paved above the tank body (1), the conveying pump (21) is communicated between the tank body (1) and the spray pipes (23) through the liquid conveying pipe (22), and each spray pipe (23) is provided with a plurality of nozzle assemblies (231) for spraying corrosive solutions to the petroleum conveying pipe (4) below.

8. The corrosion test apparatus for petroleum transportation equipment according to claim 7, wherein: each nozzle assembly (231) comprises a matched electromagnetic valve and a nozzle, the nozzle can adjust the size of the injection range, and the electromagnetic valve is used for controlling the opening and closing of the nozzle or controlling the injection force.

9. The corrosion test apparatus for petroleum transportation equipment according to claim 1, wherein: still be equipped with solution replenishment system (5), solution replenishment system (5) are including corroding solution case (51), transmission tube (52) and electron ball float valve (53), corroding solution case (51) are through transmission tube (52) and cell body (1) intercommunication, electron ball float valve (53) are located in cell body (1), are used for real-time supervision in cell body (1) corroding solution volume in order to control corroding solution case (51) and supply corroding solution towards in cell body (1).

10. The corrosion test apparatus for petroleum transportation equipment according to claim 1, wherein: still including a plurality of division board subassembly (6) that are ring form, every division board subassembly (6) all include upper plate (61) and hypoplastron (62) that can dismantle the connection, the both ends portion of upper plate (61) all are equipped with convex bolt (611), the both ends portion of hypoplastron (62) all are equipped with recess (621) that make bolt (611) insert the chucking, during the test division board subassembly (6) chucking is installed on petroleum conveying pipe (4), is used for separating the test section that has different coatings or different inoxidizing coating on petroleum conveying pipe (4).