A soil corrosion test method and test production line for hot-rolled H-beam

Abstract

The present invention discloses a hot-rolled H-beam soil corrosion test method and test production line, which belongs to the field of hot-rolled H-beam soil corrosion test. The method includes sampling the soil in the product use area, collecting product use environment data, and setting test conditions according to the collected data; weighing the hot-rolled H-beam sample; placing the hot-rolled H-beam in a container filled with soil in the product use area, and conducting a corrosion test; air-drying and weighing the sample and peeling off the surface corrosion products; weighing the sample and comparing it with the weight before the test, and calculating the corrosion level. The beneficial effects of the present invention are: using the soil in the product use area to conduct a corrosion test, and simulating the environmental conditions of the product use environment area, calculating the corrosion level through the weight of the hot-rolled H-beam before and after the test, thereby realizing the grade judgment of the accelerated corrosion of the hot-rolled H-beam on the soil in different regions, which has practical significance for timely adjusting the components in the hot-rolled H-beam, improving the efficiency of product research and development, and optimizing product production.

Description

Technical Field

[0001] The present invention relates to the field of hot-rolled H-beam soil corrosion testing, and in particular to a hot-rolled H-beam soil corrosion testing method and a testing production line. Background Art

[0002] In the research of steel structure, most of the research so far has focused on the safety and applicability of the structure, and the durability of the steel structure is guaranteed by protective measures, construction measures and maintenance systems. It is believed that the structural performance remains unchanged during service. However, many large-scale steel structure projects that have been in corrosive environments such as marine atmosphere and industrial atmosphere for a long time have experienced varying degrees of corrosion, resulting in varying degrees of degradation of structural performance during use as the material corrodes.

[0003] Steel structure systems account for a very large proportion of my country's building systems, and their corrosion-prone shortcomings are becoming more and more obvious in engineering projects. For example, the surface of hot-rolled H-shaped steel in construction projects will be in contact with the soil for a long time and will be seriously affected by soil corrosion. How to design hot-rolled H-shaped steel that meets soil corrosion resistance according to the soil environment conditions in different regions is of great significance to improving the durability, safety, applicability of steel structures and reducing production costs.

[0004] There is no equipment in the prior art for testing soil corrosion of large hot-rolled H-shaped steel products to simulate natural environment corrosion and accelerated corrosion under specific conditions. At the same time, the pipeline corrosion test methods and devices that have been disclosed cannot truly simulate the water distribution, temperature, oxygen content of natural environment soil and accelerated reaction tests under special environments. For example, the invention patent with announcement number CN203595653U discloses a soil corrosion simulation accelerated test box, including a water tank, a test box body, a control system, a water distributor, a solenoid valve, a test box, an experimental container containing soil medium, a weight sensor, and a nozzle located in the experimental container and on the upper part of the soil medium; the nozzle is connected to the solenoid valve through a second water outlet pipe; the upper end of the water distributor is connected to the water tank through a water inlet pipe, and the lower end of the water distributor is connected to the solenoid valve through a first water outlet pipe; the switch of the solenoid valve is connected to the control system; the experimental container is hung on the weight sensor, and the other end of the weight sensor is connected to the bottom of the water tank; the signal line of the weight sensor is connected to the control system; by adjusting the position of the solenoid valve, the length of the water pipe from the solenoid valve to the soil medium container is reduced, thereby improving the control accuracy of the soil medium water content, but it still cannot truly simulate the water distribution, temperature and oxygen content of the soil in the natural environment.

[0005] In view of this, the inventor conducted in-depth research on this demand, and thus the present case was produced. Summary of the invention

[0006] In order to overcome the problem that there is no test equipment for soil corrosion simulation of large hot-rolled H-beam rolled pieces and accelerated corrosion under specific conditions in the prior art, the present invention provides a soil corrosion test method for hot-rolled H-beam, comprising the following steps:

[0007] Step 1: Sample the soil in the area where the hot-rolled H-beam products are used, collect product use environment data, and set the test conditions based on the collected data;

[0008] Step 2, weighing the hot-rolled H-beam sample;

[0009] Step 3: Place the hot-rolled H-beam in a container containing soil from the area where the product will be used and conduct a corrosion test for a specific period of time;

[0010] Step 4: After the soil corrosion is completed, the sample is air-dried and weighed, and the corrosion products on the surface of the sample are peeled off;

[0011] Step 5: Weigh the sample and compare it with the weight of the sample before the test to calculate the corrosion level.

[0012] Corrosion tests were conducted using soil from the area where the products are used, and the environmental conditions of the area where the products are used were simulated. The corrosion grade was calculated based on the weight of the hot-rolled H-beam before and after the test, thereby achieving the grade evaluation of the accelerated corrosion of hot-rolled H-beam in soils from different regions. This has practical significance for timely adjusting the composition of hot-rolled H-beam, improving product research and development efficiency, and optimizing product production.

[0013] By evaluating the results of accelerated soil corrosion in different regions (including coastal saline-alkali tidal flats and forest humic acid environments), we timely adjust the composition of steel to ensure that our products are superior to other companies' hot-rolled H-beam products and supply them to customers in different regions.

[0014] Preferably, the test conditions set in step one include water content, oxygen content, temperature and soil accelerated corrosion test multiple, wherein after the soil accelerated corrosion test multiple is set, the test conditions are determined according to the soil accelerated corrosion test multiple control model.

[0015] Preferably, the soil accelerated corrosion test multiple control model is as follows:

[0016]

[0017] Among them, k1, k2, k3 are weight coefficients of temperature, pH value and water content, respectively, and k1+k2+k3=1, T0, P0 and M0 are soil temperature, pH value and water content of the use area, respectively; n1, n2 and n3 are soil temperature correction value, soil pH correction value and soil water content correction value formed by comparing soil temperature, pH value and water content of the use area with standard soil temperature, pH value and water content, respectively;

[0018] T, P, and M are the temperature, pH value, and water content in the set test conditions, respectively.

[0019] Preferably, when setting the test conditions, a correspondence table is established between the soil accelerated corrosion test multiple and the soil temperature, pH value, and water content. After the soil accelerated corrosion test multiple is set, the soil pH value and water content are first set according to the correspondence table, and then the corresponding temperature is calculated according to the soil accelerated corrosion test multiple control model.

[0020] Preferably, in step one, the time period for collecting product usage environment data is more than one year, and the number of times the product usage environment data is collected within one period is not less than four times according to the climatic conditions of the product usage area; it can be collected at regular intervals, if the time period is one year, it is collected once a quarter or a month.

[0021] In step 3, the specific time of the corrosion test corresponds to a normal corrosion time of more than one year. During the corrosion test, the soil accelerated corrosion test multiple is kept unchanged, and the test conditions are adjusted according to the collected product use environment data. Here, if the normal corrosion time is one year and the soil accelerated corrosion test multiple is 4 times, then the specific time of the corrosion test is one quarter. In this way, the effect of different soil temperatures on the corrosion rate in the four seasons of nature can be simulated.

[0022] Preferably, during the corrosion test in step three, the soil in the corrosion area of ​​the hot-rolled H-beam in the container is sampled and analyzed regularly to detect the iron ion content in the soil in the corrosion area so as to track the corrosion test process.

[0023] Preferably, the corrosion resistance level of the hot-rolled H-beam relative to the soil in the area of ​​use is judged according to the weight loss of the sample before and after the test, and the judgment rules are as follows:

[0024] when When, the hot-rolled H-beam grade is Grade 1;

[0025] when When, the hot-rolled H-beam grade is level 2;

[0026] when When, the grade of hot-rolled H-beam is grade three;

[0027] when When, the grade of hot-rolled H-beam is level 4;

[0028] when When, the grade of hot-rolled H-beam is level 5;

[0029] Wherein, G is the weight loss of hot-rolled H-beam before and after the test, and G0 is the weight of hot-rolled H-beam before the test.

[0030] The present invention also provides a hot-rolled H-beam soil corrosion test production line, which adopts the above-mentioned test method and includes soil corrosion test equipment, test air-drying weighing device and vibration stripping corrosion product device in sequence. The soil corrosion test equipment includes a test box and a water tank arranged directly below the test box. A plurality of water inlets and outlets are arranged at the bottom of the test box. The water inlets and outlets include a water inlet and an overflow port. A strip water diversion material is arranged in the water inlet. The bottom end of the strip water diversion material is located in the water tank, and the top end is located in the test box.

[0031] Preferably, the test air-drying weighing device comprises a hanging weighing device and a horizontal air-drying device, the horizontal air-drying device comprises a horizontal air-drying shell, a hot air air-drying pipe row and a hot air blower for conveying hot air to the hot air air-drying pipe row, the hot air air-drying pipe row is arranged on the inner wall of the horizontal air-drying shell and a plurality of hot air nozzles are evenly distributed on the hot air air-drying pipe row;

[0032] The horizontal air-drying shell is open at both ends and has a receiving space formed inside for horizontally placing the hot-rolled H-shaped steel. The hanging weighing device includes a hanging assembly for hanging the webs at both ends of the hot-rolled H-shaped steel placed in the receiving space.

[0033] Preferably, the soil corrosion test equipment is also provided with a soil sampling device during the test, and the soil sampling device comprises a sampling body, a sampling bin body is provided at the bottom end of the sampling body, a sampling port and a spring scraper plate installed at the sampling port are opened on the side wall of the sampling bin body, one side of the spring scraper plate is rotatably installed on one side edge of the sampling port through a driving rod, and the rotating axis of the driving rod located at the sampling bin body part is parallel to the central axis of the sampling bin body.

[0034] Beneficial effects:

[0035] The beneficial effects produced by the technical solution of the present invention are as follows:

[0036] (1) The corrosion test was conducted using the soil from the area where the product is used, and the environmental conditions of the area where the product is used were simulated. The corrosion level was calculated based on the weight of the hot-rolled H-beam before and after the test, thereby realizing the grade evaluation of the accelerated corrosion of the hot-rolled H-beam in soils from different regions. This has practical significance for timely adjusting the composition of the hot-rolled H-beam, improving product research and development efficiency, and optimizing product production.

[0037] (2) By evaluating the results of accelerated soil corrosion in different regions (including coastal saline-alkali tidal flats and forest humic acid environments), the composition of steel is adjusted in a timely manner to ensure that the product is superior to other companies' hot-rolled H-beam products and is supplied to customers in different regions.

[0038] (3) It provides reaction vessels for hot-rolled H-beams with accelerated corrosion in soils in different regions, such as coastal saline-alkali tidal flats and forest humic acid environments. It also facilitates customers to evaluate the technical conditions of the company's hot-rolled H-beam products and provide solutions for extreme usage environments, such as soils containing acid and soils with CO2 and H2S in the air. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0040] Figure 1 This is a preferred hot-rolled H-beam soil corrosion test process flow chart of the present invention;

[0041] Figure 2 This is a schematic diagram of the external main view of a preferred hot-rolled H-beam soil corrosion test equipment of the present invention;

[0042] Figure 3 This is a schematic diagram of the interior of a preferred hot-rolled H-beam soil corrosion test equipment of the present invention;

[0043] Figure 4 It is a schematic diagram of the interior side view of a preferred hot-rolled H-beam soil corrosion test equipment of the present invention;

[0044] Figure 5 This is a schematic diagram of a preferred delivery pipe structure of the present invention;

[0045] Figure 6 This is a schematic diagram of the main structure of the preferred hot-rolled H-beam soil corrosion test equipment of the present invention. Figure 2 ;

[0046] Figure 7 This is a schematic diagram of the interior side view of the preferred hot-rolled H-beam soil corrosion test equipment of the present invention. Figure 2 ;

[0047] Figure 8 It is a schematic diagram of the external main view of a preferred soil sampling device for hot-rolled H-beam soil corrosion test of the present invention;

[0048] Fig. 9 It is a schematic diagram of the interior of a preferred hot-rolled H-beam soil corrosion test soil sampling device of the present invention;

[0049] Fig.10 It is a schematic diagram of the position relationship between the preferred spring scraper plate and the sampling port of the present invention.

[0050] Fig.11This is a schematic diagram of the external main view of a preferred hot-rolled H-beam soil corrosion test air-drying weighing equipment of the present invention;

[0051] Fig.12 It is a schematic diagram of the interior of the preferred hot-rolled H-beam soil corrosion test air-drying weighing equipment of the present invention;

[0052] Fig.13 It is a schematic diagram of the internal side view of a preferred hot-rolled H-beam soil corrosion test equipment of the present invention.

[0053] Fig.14 It is a schematic diagram of the main view of a preferred hot-rolled H-beam soil corrosion test vibration stripping corrosion product device of the present invention;

[0054] Fig.15 It is a schematic top view of a preferred device for vibrating and stripping corrosion products in soil corrosion tests of hot-rolled H-beams according to the present invention. DETAILED DESCRIPTION

[0055] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents the selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0056] This implementation method uses the soil in the area where the product is used to conduct corrosion tests, and simulates the environmental conditions of the area where the product is used. The corrosion level is calculated by the weight of the hot-rolled H-beam before and after the test, thereby realizing the grade judgment of the accelerated corrosion of the hot-rolled H-beam on the soil in different regions, which has practical significance for timely adjusting the ingredients in the hot-rolled H-beam, improving product research and development efficiency, and optimizing product production. The specific implementation method is as follows:

[0057] like Figure 1 As shown, a soil corrosion test method for hot-rolled H-beam comprises the following steps:

[0058] Step S101, sampling soil in the area where the hot-rolled H-beam products are used, collecting product use environment data, and setting test conditions based on the collected data;

[0059] Step S102, weighing the hot-rolled H-beam sample;

[0060] Step S103, placing the hot-rolled H-shaped steel in a container filled with soil from the area where the product is used, and conducting a corrosion test for a specific period of time;

[0061] Step S104, after the soil corrosion is completed, the sample is air-dried and weighed, and the corrosion products on the surface of the sample are peeled off;

[0062] Step S105, weigh the sample and compare it with the weight of the sample before the test to calculate the corrosion level.

[0063] By evaluating the results of accelerated soil corrosion in different regions (including coastal saline-alkali tidal flats and forest humic acid environments), we timely adjust the composition of steel to ensure that our products are superior to other companies' hot-rolled H-beam products and supply them to customers in different regions.

[0064] As a preferred implementation, the test conditions set in step S101 include water content, oxygen content, temperature and soil accelerated corrosion test multiple, wherein after the soil accelerated corrosion test multiple is set, the test conditions are determined according to the soil accelerated corrosion test multiple control model.

[0065] As a preferred implementation, the soil accelerated corrosion test multiple control model is as follows:

[0066]

[0067] Among them, k1, k2, k3 are weight coefficients of temperature, pH value and water content, respectively, and k1+k2+k3=1, T0, P0 and M0 are soil temperature, pH value and water content of the use area, respectively; n1, n2 and n3 are soil temperature correction value, soil pH correction value and soil water content correction value formed by comparing soil temperature, pH value and water content of the use area with standard soil temperature, pH value and water content, respectively;

[0068] T, P, and M are the temperature, pH value, and water content in the set test conditions, respectively.

[0069] As a preferred implementation, when setting the test conditions, a correspondence table is established between the soil accelerated corrosion test multiple and the soil temperature, pH value, and water content. After the soil accelerated corrosion test multiple is set, the soil pH value and water content are first set according to the correspondence table, and then the corresponding temperature is calculated according to the soil accelerated corrosion test multiple control model.

[0070] As a preferred implementation, in step S102, the time period for collecting product usage environment data is more than one year, and the number of times the product usage environment data is collected within one period is not less than four times according to the climatic conditions of the product usage area; it can be collected at regular intervals, if the time period is one year, it is collected once a quarter or a month.

[0071] In step S103, the normal corrosion time corresponding to the specific time of the corrosion test is more than one year. During the corrosion test, the soil accelerated corrosion test multiple is kept unchanged, and the test conditions are adjusted according to the collected product use environment data. Here, if the normal corrosion time is one year and the soil accelerated corrosion test multiple is 4 times, then the specific time of the corrosion test is one quarter. In this way, the influence of different soil temperatures in four seasons in nature on the corrosion rate can be simulated.

[0072] As a preferred implementation, during the corrosion test in step S103, the soil in the corrosion area of ​​the hot-rolled H-beam in the container is sampled and analyzed regularly to detect the iron ion content in the soil in the corrosion area so as to track the corrosion test process.

[0073] As a preferred embodiment, the corrosion resistance level of the hot-rolled H-beam relative to the soil in the area of ​​use is judged according to the weight loss of the sample before and after the test, and the judgment rules are as follows:

[0074] when When, the hot-rolled H-beam grade is Grade 1;

[0075] when When, the hot-rolled H-beam grade is level 2;

[0076] when When, the grade of hot-rolled H-beam is grade three;

[0077] when When, the grade of hot-rolled H-beam is level 4;

[0078] when When, the grade of hot-rolled H-beam is level 5;

[0079] Wherein, G is the weight loss of hot-rolled H-beam before and after the test, and G0 is the weight of hot-rolled H-beam before the test.

[0080] This embodiment also provides a hot-rolled H-beam soil corrosion test production line, using the above test method, such as Figure 2-15 As shown, it includes soil corrosion test equipment 1, test air drying weighing device 2 and vibration stripping corrosion product device 3, as shown in FIG. Figure 2-5 As shown, the soil corrosion test equipment 1 includes a test box 11 and a water tank 12 arranged directly below the test box 11. A plurality of water inlets and outlets 13 are arranged at the bottom of the test box 11. The water inlets and outlets 13 include a water inlet 131 and an overflow port 132. A strip water diversion material 133 is arranged in the water inlet 131. The bottom end of the strip water diversion material 133 is located in the water tank 12, and the top end is located in the test box 11.

[0081] As a preferred embodiment, a delivery pipe 14 is installed at the top of the test box 11, and nozzles 141 are evenly distributed on the lower surface of the delivery pipe 14; an accommodating space for accommodating the hot-rolled H-shaped steel 100 is formed between the water inlet and outlet 13 in the test box 11 and the delivery pipe 14.

[0082] As a preferred embodiment, the strip-shaped water diversion material 133 is wick cotton. Here, wick cotton is used, and the excellent water absorption and fiber fineness of wick cotton fibers are utilized to make it easier for the water in the water tank to be introduced into the soil in the test box through the wick cotton.

[0083] As a preferred embodiment, the water inlet and outlet 13 are arranged in two rows, each row of the water inlet and outlet is arranged along the length direction of the test box 11, and one row of the water inlet and outlet is the water inlet 131, and the other row of the water inlet and outlet is the overflow port 132.

[0084] As a preferred embodiment, the water tank 12 is filled with a test liquid 121, the position below the delivery pipe 14 in the test box 11 is filled with soil 15, the bottom end of the strip-shaped water-drawing material 133 is immersed in the test liquid 121, and the top end of the strip-shaped water-drawing material 133 is dispersed into a plurality of roots evenly distributed in the soil 15. Taking advantage of the large number of fibers in a bundle of wick cotton, its upper end is dispersed into a plurality of roots evenly distributed in the soil, so that the water sucked up from the bottom extends along the fiber direction of the upper end of the wick cotton and is absorbed by the soil, thereby achieving the purpose of simulating the water distribution in the soil under the natural environment.

[0085] As a preferred embodiment, Figure 5 As shown, the delivery pipe 14 is a pipe row, including a main delivery pipe 142 and a branch delivery pipe 143. A plurality of branch delivery pipes 143 are evenly distributed along the length direction of the main delivery pipe 142, and the nozzles 141 are evenly distributed on the lower surface of the branch delivery pipe 143. The pipe row is arranged above the soil, which can not only pass the test liquid to spray actively, and realize the control of the moisture in the soil by the passive control of the moisture in the soil by the capillary effect at the bottom of the test box, but also pass CO2, H2S and other gases to adjust the acid content of the soil and the content of CO2, H2S and other gases in the air, so as to achieve the purpose of simulating extreme use environment.

[0086] As a preferred embodiment, the main delivery pipe 142 enters the test box 11 through the side wall of the test box 11 near its top, and is connected to a multi-way conversion valve through a hose connector 111. The multi-way conversion valve is provided with at least two inlet channels, which are respectively connected to the output pump of the liquid preparation tank and the pressure regulator of the accelerated reaction gas cylinder. The delivery pipe, nozzle, overflow hole, etc. can realize the water content control of the test soil, the accelerated corrosion oxygen content control, and the accelerated corrosion test of corrosive gases such as carbon dioxide and hydrogen sulfide.

[0087] As a preferred embodiment, the test box 11 adopts a transparent organic glass plate test box, the water tank 2 adopts a stainless steel water tank, and the transparent organic glass plate test box, the stainless steel water tank, and the wick cotton form a simulated soil water distribution, making the hot-rolled H-beam soil corrosion test closer to the natural environment.

[0088] As a preferred embodiment, the inlet channel of the multi-way conversion valve is respectively connected to the CO2 inlet pipe, the H2S inlet pipe or the test liquid water inlet pipe. When spraying harmful gases, for the safety of personnel, the overflow hole at the lower end of the test box is connected to the outdoor harmful gas washing tower with a hose, and after the environmental harmless treatment is completed, the tower is released at high altitude.

[0089] As a preferred embodiment, the left and right sides of the test box 11 are respectively provided with a box left cover 112 and a box right cover 113, and the main delivery pipe 142 enters the test box 11 through the box left cover 112 or the box right cover 113. The test box and the box left cover and box right cover are all made of organic glass plates and are sealed to facilitate observation of the test and prevent corrosion of the test box.

[0090] As a preferred implementation, a temperature sensor, a soil acidity sensor and / or a soil moisture sensor is disposed in the test box.

[0091] Here, the temperature, soil acidity and soil moisture in the soil are tested by temperature sensors, soil acidity sensors and / or soil moisture sensors, and the temperature inside the test box 11 is adjusted. The temperature control here can be achieved by setting a heating device in the box, controlling the temperature of the gas or liquid transported in the delivery pipe, or controlling the water temperature in the water tank.

[0092] The control of soil acidity is achieved by transporting CO2 or H2S gas in the delivery pipe. The control of soil moisture can also be achieved by controlling the number of water inlets 131 and overflow outlets 132, the material and thickness of the strip water diversion material 133, the distance between the liquid surface in the water tank and the water inlet, the distribution of the thin strips on the upper end of the strip water diversion material, etc. It can also be achieved by controlling the rate of transporting the test solution in the delivery pipe.

[0093] During operation, soil from the area to be measured is collected, and data such as soil temperature, moisture content, soil acidity, soil density, etc. are collected. The soil and hot-rolled H-beam are placed in the containing space in the test box so that the soil covers the surface of the hot-rolled H-beam. At the same time, the thin strips on the upper end of the wick cotton are evenly distributed in the soil. The test liquid is filled into the water tank and covered with the lower end of the wick cotton. The left cover and the right cover of the box are closed on both sides of the test box. The type and rate of the gas or liquid transported in the delivery pipe are controlled so that the conditions in the test box reach the set values, thereby realizing the simulation of accelerated corrosion of hot-rolled H-beam soil.

[0094] As a preferred embodiment, Figure 6-7 As shown, the soil corrosion test equipment 1 further includes heat exchange plates 6 arranged on both sides of the hot-rolled H-shaped steel 100 .

[0095] The hot-rolled H-beam 100 is placed horizontally along the length direction of the test box 1, and its two side surfaces are arranged vertically, and the planes where the heat exchange plates 6 located on both sides of the hot-rolled H-beam 100 are located are parallel to the two side surfaces of the hot-rolled H-beam 100. Here, in order to make the water content in the soil closer to the natural state under the action of capillary effect, the heat exchange plate should maintain a suitable distance from the hot-rolled H-beam, and balance its influence on the soil temperature and water distribution around the hot-rolled H-beam.

[0096] The plate surface area of ​​the heat exchange plate 6 is larger than the side surface area of ​​the hot-rolled H-shaped steel 100, and the heat exchange plate 6 is made of copper, and its surface is coated with a corrosion-resistant coating to prevent corrosion of the heat exchange plate.

[0097] As a preferred embodiment, a refrigerant inlet interface pipe 61 and a refrigerant outlet interface pipe 62 are provided on one side of the length direction of the heat exchange plate 6, and the refrigerant outlet interface pipe 62 is connected to the refrigerant inlet of the heat exchange plate temperature control system 7 located outside the test box 11 through a refrigerant pipeline 63, and the refrigerant outlet of the heat exchange plate temperature control system 7 is connected to the refrigerant inlet interface pipe 61.

[0098] As a preferred embodiment, the heat exchange plate temperature control system 7 includes a radiator 71, a compressor 72, a gas-liquid separator 73, a four-way reversing valve 74 and a temperature controller 75, the refrigerant outlet interface pipe 62 is connected to the inlet of the radiator 71, the outlet of the radiator 71 is connected to the first inlet of the four-way reversing valve 74, the first outlet of the four-way reversing valve 74 is connected to the inlet of the gas-liquid separator 73, the outlet of the gas-liquid separator 73 is connected to the compressor 72, the outlet of the compressor 72 is connected to the second inlet of the four-way reversing valve 74, the second outlet of the four-way reversing valve 74 is connected to the refrigerant inlet interface pipe 51, and a temperature controller 75 is provided between the second outlet of the four-way reversing valve 74 and the refrigerant inlet interface pipe 61;

[0099] The first inlet of the four-way reversing valve 74 is connected to the first outlet, and the second inlet is connected to the second outlet. The soil in the test box is heated and cooled by the heat exchange plate of the "air conditioner principle" to make the soil meet the test temperature design requirements.

[0100] The test box is provided with a temperature sensor, which detects the temperature in the soil and then controls the temperature controller to keep the soil temperature within a set range.

[0101] As a preferred embodiment, Figure 8-10 As shown, the soil corrosion test equipment 1 is also provided with a soil sampling device 4 during the test, and the soil sampling device 4 includes a sampling body 41, and the sampling body 41 is made of corrosion-resistant steel. A sampling chamber 411 is provided at the bottom of the sampling body 41, and a sampling port 412 and a spring scraper plate 413 installed at the sampling port 412 are provided on the side wall of the sampling chamber 411. One side of the spring scraper plate 413 is rotatably installed on one side edge of the sampling port 412 through a driving rod 414, and the rotating axis of the driving rod 414 located at the sampling chamber 411 is parallel to the central axis of the sampling chamber 411.

[0102] Both ends of the driving rod 414 are rotatably mounted on the inner wall of the sampling body 411 through bearings 415 .

[0103] As a preferred embodiment, a driving ratchet 416 is provided on the driving rod 414 at a position between the two bearings 415, and an opening 421 is provided on the sampling body 41 at a position corresponding to the driving ratchet 416, through which the driving ratchet 416 partially passes and is exposed outside the sampling body 41. The driving ratchet can be used to control the angle between the spring scraper plate and the sampling port, thereby controlling the sampling radius; and after the sampling is completed, the driving ratchet can be manually adjusted to make it close to the sampling port, so as to prevent the soil inside the sampling bin from leaking out of the sampling port.

[0104] As a preferred embodiment, a chamber top cone 417 is provided at the bottom end of the sampling chamber 411, and a first cavity sealing plate 422 is provided between the chamber top cone 417 and the sampling chamber 411, one end of the driving rod 414 passes through the first cavity sealing plate 422 and is installed on the side of the first cavity sealing plate 422 close to the chamber top cone 417 through a bearing 415, and a bearing rubber sealing cover 423 is provided at a position corresponding to the driving rod 414 on the side of the first cavity sealing plate 422 close to the sampling chamber 411.

[0105] As a preferred embodiment, the sampling body 41 further includes a sampling rod 418 disposed at the top of the sampling chamber 411, a second cavity sealing plate 424 is disposed between the sampling rod 418 and the sampling chamber 411, and one end of the driving rod 414 passes through the second cavity sealing plate 424 and is installed on the inner wall of the sampling rod 418 via a bearing 415. In order to improve the stability of the driving rod 414, a bearing 415 may also be disposed in the middle thereof.

[0106] As a preferred embodiment, the driving ratchet 416 is located at a position on the driving rod 414 corresponding to the sampling rod 418, and an opening 421 is provided on the sampling rod 418 at a position corresponding to the driving ratchet 416 for partially passing the driving ratchet 416 and being exposed outside the sampling body 41.

[0107] As a preferred embodiment, the sampling rod 418 and the sampling chamber body 411 are both hollow cylinders, the outer diameter of the sampling rod 418 is smaller than the outer diameter of the sampling chamber body 411 and the inner diameter is smaller than the inner diameter of the sampling chamber body 411, and the trajectory profile of the driving rod 414 is consistent with the inner wall profile corresponding to the sampling body 1 through which it passes.

[0108] As a preferred embodiment, the sampling rod 418 is provided with a truncated cone section 425 with a linear transition between the outer diameter and the inner diameter at one end close to the sampling chamber body 411 .

[0109] As a preferred embodiment, a handle 419 is provided at one end of the sampling rod 418 away from the sampling chamber body 411 .

[0110] As a preferred implementation, the spring scraper plate 413 includes a scraper plate 426 and a spring 427 fixedly disposed on one side of the scraper plate 426 , and the spring 427 is sleeved outside the driving rod 414 .

[0111] As a preferred embodiment, the outer surface of the sampling rod 418 is also engraved with a length scale, and the sampling rod 418 can be inserted into the test soil and accurately positioned according to the scale.

[0112] During operation, after inserting the sampling device into a certain point of the test chamber, the control handle rotates the sampling device, and the spring scraper plate collects the soil at that point into the sampling chamber, thereby achieving accurate sampling of the soil at a certain point, and then detecting the component analysis data.

[0113] As a preferred embodiment, Figure 11-13As shown, the test air-drying weighing device 2 includes a hanging weighing device 21 and a horizontal air-drying device 22, the horizontal air-drying device 22 includes a horizontal air-drying shell 221, a hot air air-drying pipe row 222 and a hot air blower 223 for conveying hot air to the hot air air-drying pipe row 222, the hot air air-drying pipe row 222 is arranged on the inner wall of the horizontal air-drying shell 221 and a plurality of hot air nozzles 271 are evenly distributed on the hot air air-drying pipe row 222;

[0114] The horizontal air-drying shell 221 is open at both ends and has a receiving space inside for horizontally placing the hot-rolled H-shaped steel 100. The hanging weighing device 21 includes a hanging assembly 211 for hanging the webs at both ends of the hot-rolled H-shaped steel 100 placed in the receiving space.

[0115] As a preferred embodiment, the hot air drying duct row 222 is provided with two groups of semicircular air ducts 224 along the circumferential direction, and each group of the semicircular air ducts 224 is arranged with a plurality of semicircular air ducts 224 along the axial direction of the horizontal air drying shell 221, and all the semicircular air ducts 24 in the same group are connected to the same hot air blower 223 through the hot air duct 225.

[0116] As a preferred embodiment, the hot air duct 225 includes a hot air main pipe 272 and hot air branch pipes 273 distributed on the hot air main pipe 272 along the length direction. The input end of the hot air main pipe 272 is connected to the hot air blower 223, and each of the hot air branch pipes 273 passes through the horizontal air drying shell 221 and is connected to a semicircular air duct 224 at a corresponding position.

[0117] As a preferred embodiment, an accommodation space for horizontally placing the hot-rolled H-shaped steel 100 is formed between the two groups of the semicircular air ducts 224 , and the hot air nozzle 271 is facing the hot-rolled H-shaped steel 100 .

[0118] As a preferred embodiment, the hot air nozzles 271 are evenly distributed along the length direction of each semicircular air duct 224. Here, two groups of semicircular air ducts are provided which are symmetrical on both sides, and the hot air nozzles are evenly distributed on the semicircular air ducts, forming a symmetrical arrangement on both sides and top and bottom, thereby offsetting the influence of wind force on the weighing of the hot-rolled H-beam during the hot air drying process.

[0119] The horizontal air-drying housing 221 is a hollow cylinder formed by connecting two side edges of two semicircular housings 274 via a lock 275 .

[0120] As a preferred embodiment, the horizontal air-drying device 22 further includes a support 226, and the bottom of the horizontal air-drying housing 221 is fixedly mounted on the support 226;

[0121] The support 226 includes a base plate 276, a support support rod 277 and an arc-shaped mounting plate 278. The lower end of the support support rod 277 is fixedly mounted on the upper surfaces of both ends of the base plate 276, and the upper end is fixedly mounted on the lower surface of the arc-shaped mounting plate 278. The bottom of the horizontal air-drying housing 221 is fixedly mounted on the upper surface of the arc-shaped mounting plate 278.

[0122] As a preferred embodiment, the hanging weighing device 21 further includes a test load-bearing platform 212, an electronic platform scale 213, a shoulder pole hook 214 and a hanging pull rod 215, wherein the electronic platform scale 213 is placed on the test load-bearing platform 212, the shoulder pole hook 214 is placed on the upper surface of the electronic platform scale 213 and the center of the shoulder pole hook 214 is located at the middle position of the electronic platform scale 213;

[0123] The upper ends of the two hanging rods 215 are respectively mounted on the hooks at both ends of the shoulder pole hook 214, and the lower ends are fixedly mounted on the hanging assembly 211. The design of the hanging assembly allows the hot-rolled H-beam to be suspended in the accommodation space formed between the two sets of semicircular air ducts, providing conditions for real-time measurement of the weight of the hot-rolled H-beam during the hot air drying process.

[0124] As a preferred implementation, the two hanging rods 215 are provided with length adjustment screws 279 for adjusting the length of the hanging rods 215 .

[0125] As a preferred embodiment, the hanging assembly 211 is a rectangle with an opening at the bottom, and a hook portion 281 is formed at the bottom opening for supporting the lower surface of the web at both ends of the hot-rolled H-shaped steel 100. The lower ends of the two hanging rods 215 are fixedly installed on the upper side of the hanging rod 215, and the midpoint of the two installation points coincides with the midpoint of the upper side of the hanging rod 215.

[0126] During the air-drying and weighing operation, the hot-rolled H-beam is placed in the accommodating space between two sets of semicircular air ducts and hung at the opening below the hanging component. The weight of the hot-rolled H-beam is obtained in real time, and the hot air blower is started to air-dry the moisture of the corrosion products in the hot-rolled H-beam until the value displayed on the electronic scale remains unchanged. The moisture weight of the corrosion products is obtained, and the weight of the peeled corrosion products is further measured to calculate the moisture content of the corrosion products.

[0127] As a preferred embodiment, Fig.14 and 15 As shown, the vibration stripping corrosion product device 3 includes a base 31 and a vibration frame 32. The bottom of the vibration frame 32 is fixedly installed on the base 31 through a vibration spring 33. The upper surface of the vibration frame 32 is an inclined surface inclined to one side, and a baffle 34 is arranged on the upper surface close to the lower side of the inclined surface. An eccentric wheel exciter 35 is installed on the vibration frame 32.

[0128] As a preferred embodiment, the eccentric wheel vibrator 35 includes a vibration motor 351 and an eccentric vibration wheel 352 . The vibration motor 351 is installed on the side of the vibration frame 32 , and the eccentric vibration wheel 352 is fixedly installed on the rotating shaft of the vibration motor 351 .

[0129] As a preferred implementation, the excitation motor 351 is installed on the side of the vibration frame 32 with a higher inclined surface.

[0130] As a preferred embodiment, the vibration frame 32 includes a bottom frame 321, a high support column 322, a low support column 323 and a top frame 324. The bottom of the bottom frame 321 is fixedly mounted on the base 31 through a vibration spring 33. The high support column 322 and the low support column 323 are respectively fixedly mounted on the upper surfaces of both sides of the bottom frame 321. The top frame 324 is fixedly mounted on the top of the high support column 322 and the low support column 323 to form an inclined surface. The baffle 34 is provided on the upper surface of one side of the low support column 323.

[0131] As a preferred embodiment, the two sides of the bottom of the bottom frame 321 are fixedly mounted on the base 31 by two sets of identical vibration springs 33, and when the hot-rolled H-shaped steel 100 is placed on the top frame 324, the plane where the bottom frame 321 is located is parallel to the horizontal plane.

[0132] As a preferred implementation, the excitation motor 351 is installed on the high support column 322 , and the rotation axis of the excitation motor 351 is parallel to the length direction of the baffle 34 .

[0133] As a preferred embodiment, a plurality of steel rails 361 are evenly arranged on the top frame 324 from high to low.

[0134] As a preferred embodiment, baffle bars 362 are provided on both sides of the top frame 324 that are perpendicular to the baffle plate 34 .

[0135] As a preferred embodiment, at least two baffle rods 362 are evenly distributed on each of the two sides of the top frame 324 that are perpendicular to the baffle plate 34 , and the length direction of the baffle rods 362 is perpendicular to the plane where the top frame 324 is located.

[0136] As a preferred implementation, a corrosion product collection plate 311 is provided on the upper surface of the base 31 .

[0137] When conducting a vibration stripping test, place the hot-rolled H-beam on the top frame so that its length is perpendicular to the length of the rail, start the excitation motor to vibrate, and weigh the soil corrosion products on the corrosion product collection plate after the hot-rolled H-beam is stripped cleanly to obtain the weight of the soil corrosion products. Alternatively, the hot-rolled H-beam can be weighed before being placed on the top frame, and then weighed again after being stripped cleanly, and the weight of the soil corrosion products can be calculated by the weight difference. The corrosion products of the air-dried soil-corroded hot-rolled H-beam sample are stripped using the principle of tapping and vibration. The collected corrosion product components are free of impurities, and the analysis results are representative. At the same time, the sample and the corrosion product are completely stripped, and the weighing weight loss results are accurate.

[0138] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A soil corrosion test method for hot-rolled H-beam, characterized in that: The steps include: Step 1: Sample the soil in the area where the hot-rolled H-beam products are used, collect product use environment data, and set the test conditions based on the collected data; Step 2, weighing the hot-rolled H-beam sample; Step 3: Place the hot-rolled H-beam in a container containing soil from the area where the product will be used and conduct a corrosion test for a specific period of time; Step 4: After the soil corrosion is completed, the sample is air-dried and weighed, and the corrosion products on the surface of the sample are peeled off; Step 5, weigh the sample and compare it with the weight of the sample before the test to calculate the corrosion level; The test conditions set in step 1 include water content, oxygen content, temperature and soil accelerated corrosion test multiple. After the soil accelerated corrosion test multiple is set, the test conditions are determined according to the soil accelerated corrosion test multiple control model. The soil accelerated corrosion test multiple control model is as follows: Wherein k1, k2, k3 are weight coefficients of temperature, pH value and water content, respectively, and k1+k2+k3=1, T0, P0 and M0 are soil temperature, pH value and water content of the use area, respectively; n1, n2 and n3 are soil temperature correction value, soil pH correction value and soil water content correction value formed by comparing soil temperature, pH value and water content of the use area with standard soil temperature, pH value and water content, respectively; T, P and M are temperature, pH value and water content in the set test conditions, respectively; when setting the test conditions, a corresponding table of the relationship between soil accelerated corrosion test multiple and soil temperature, pH value and water content is established. After setting the soil accelerated corrosion test multiple, the soil pH value and water content are first set according to the corresponding table, and then the corresponding temperature is calculated according to the soil accelerated corrosion test multiple control model; In the step three, the normal corrosion time corresponding to the specific time of the corrosion test is more than one year. During the corrosion test, the soil accelerated corrosion test multiple is kept unchanged, and the test conditions are adjusted according to the collected product use environment data.

2. A soil corrosion test method for hot-rolled H-beam according to claim 1, characterized in that: In step 1, the time period for collecting product use environment data is more than one year, and the number of times the product use environment data is collected within one period is not less than four times according to the climatic conditions of the area where the product is used.

3. A soil corrosion test method for hot-rolled H-beam according to claim 1, characterized in that: During the corrosion test in step 3, the soil in the corrosion area of ​​the hot-rolled H-beam in the container is sampled and analyzed regularly to detect the iron ion content in the soil in the corrosion area in order to track the corrosion test process.

4. A soil corrosion test method for hot-rolled H-beam according to claim 1, characterized in that: According to the weight loss of the sample before and after the test, the corrosion resistance level of the hot-rolled H-beam relative to the soil in the use area is judged. The judgment rules are as follows: when When, the hot-rolled H-beam grade is Grade 1; when When, the hot-rolled H-beam grade is level 2; when When, the grade of hot-rolled H-beam is grade three; when When, the grade of hot-rolled H-beam is level 4; when When, the grade of hot-rolled H-beam is level 5; Wherein, G is the weight loss of hot-rolled H-beam before and after the test, and G0 is the weight of hot-rolled H-beam before the test.

5. A hot-rolled H-beam soil corrosion test production line, characterized in that: The test method as described in any one of claims 1 to 4 is adopted, which includes soil corrosion test equipment, test air-drying weighing device and vibration stripping corrosion product device in sequence, the soil corrosion test equipment includes a test box and a water tank arranged directly below the test box, a plurality of water inlets and outlets are arranged at the bottom of the test box, the water inlets and outlets include a water inlet and an overflow port, a strip water diversion material is arranged in the water inlet, the bottom end of the strip water diversion material is located in the water tank, and the top end is located in the test box.

6. A hot-rolled H-beam soil corrosion test production line according to claim 5, characterized in that: The test air-drying weighing device comprises a hanging weighing device and a horizontal air-drying device, wherein the horizontal air-drying device comprises a horizontal air-drying shell, a hot air air-drying pipe row and a hot air blower for conveying hot air to the hot air air-drying pipe row, wherein the hot air air-drying pipe row is arranged on the inner wall of the horizontal air-drying shell and a plurality of hot air nozzles are evenly distributed on the hot air air-drying pipe row; The horizontal air-drying shell is open at both ends and has a receiving space formed inside for horizontally placing the hot-rolled H-shaped steel. The hanging weighing device includes a hanging assembly for hanging the webs at both ends of the hot-rolled H-shaped steel placed in the receiving space.

7. A hot-rolled H-beam soil corrosion test production line according to claim 5, characterized in that: The soil corrosion test equipment is also provided with a soil sampling device during the test process, and the soil sampling device includes a sampling body, a sampling bin body is provided at the bottom end of the sampling body, a sampling port and a spring scraper plate installed at the sampling port are opened on the side wall of the sampling bin body, one side of the spring scraper plate is rotatably installed on one side edge of the sampling port through a driving rod, and the rotating axis of the driving rod located at the sampling bin body part is parallel to the central axis of the sampling bin body.

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