A simulation test bench for the anti-caking mud cake steel plate used in a shield cutter head and its characteristic testing

Abstract

The present invention relates to a test device for shield construction equipment, and specifically relates to a simulation test bench for anti-caking steel plates used on shield cutter heads and their characteristic tests. It aims to solve the problem in the prior art that caking on the shield cutter head affects the outflow of slurry, thereby affecting the overall working state. The present invention is installed on the shield cutter head, specifically clamped on the front cutting surface of the cutter head on the cutter disc, with the same geometric dimensions as the front cutting surface of the cutter head on the cutter disc, and is connected to the front cutting surface via bolts. The steel plate is made by modifying one of molybdenum-vanadium alloy and Q235 / Q245, and the surface finish of the upper surface is less than 0.1. The advantages are as follows: It is equivalent to adding a toughened film that is beneficial for slurry sliding on the cutter head. At the same time, the toughened film itself has a set of detection platforms, enabling real-time adjustment and replacement under different working conditions.

Description

Technical Field

[0001] The present invention relates to a test device for shield construction equipment, and specifically relates to a simulation test bench for anti-caking mud cake steel plates for shield cutterheads and their characteristic tests. Background Art

[0002] During shield tunneling operations, the strata at the top of the tunnel mainly consist of silty clay, silty fine sand, clay, gravelly soil, and cobble soil. The strata traversed by the tunnel are as follows: silty clay accounts for 16%, silty fine sand accounts for 11%, clay accounts for 8%, gravelly soil accounts for 15%, cobble soil accounts for 5%, strongly weathered mudstone accounts for 25%, moderately weathered mudstone accounts for 14%, and moderately weathered gravelly argillaceous sandstone accounts for 2%. Karst also exists in some locations.

[0003] Clay, strongly to moderately weathered mudstone contain a large amount of viscous minerals, and the soil adhesion is strong. Viscous particles have certain water absorption expansion and adsorption capabilities. The clay cut by the cutter is extremely easy to adhere to the cutterhead panel and the cutterhead opening position, and it is not easy to flow out of the bin in a circular manner, prone to stagnant discharge, and prone to form a piled bottom bin at the bottom of the bin. The viscous soil attached to the cutterhead forms a mud cake on the cutterhead panel under extrusion, clogging the cutterhead opening, resulting in poor circulation in the bin, reducing the tunneling efficiency. When the shield tunnels through strata containing clay and mudstone for more than 2400 meters, preventing and controlling mud cake formation on the cutterhead during the tunneling process of this project is a key and difficult point.

[0004] At present, the analysis and prediction of cutterhead mud cake data mainly focus on simulating the on-site working conditions. For example, in the publicly disclosed Chinese patent documents, the patent with the application number CN201810116195.4, titled "An experimental device and method for simulating mud cake formation on the cutter head of an earth pressure balance shield", simulates the tunneling of a shield in a specific soil body, adjusts the cutter arrangement and construction parameters, and observes the distribution and morphology of the mud cake, so as to provide a basis for studying the generation mechanism of the mud cake phenomenon and the prevention and disposal methods of the mud cake. Another example is the patent with the application number CN 202110140730.1, titled "A simulation system for controlling mud cake formation on the cutter head of a shield", which also provides a basis for the prevention and disposal methods of the mud cake through the simulation of the cutterhead.

[0005] However, the applicant believes that the current technology mainly focuses on simulating the cutterhead system, measuring the real-time temperature and pressure on the cutterhead, and then improving the cutterhead in combination with the sample situation. However, in actual operation, it is known that the adjustable space for the cutting angle and cutting temperature on the cutterhead is actually very low, and in most cases, appropriate adjustments cannot be fully made. Summary of the Invention

[0006] The purpose of the present invention is to solve the problem in the prior art that the formation of mud cake on the shield cutter head affects the outflow of slurry, and further affects the overall working state.

[0007] The specific solution of the present invention is as follows:

[0008] Design a steel plate for a shield cutter head, which is installed on the shield cutter head, specifically clamped on the front cutting surface of the cutter head on the cutter disc, with the same form and position dimensions as the front cutting surface of the cutter head on the cutter disc, and is connected to the front cutting surface by bolts. The steel plate is made of one of molybdenum-vanadium alloy and Q235 / Q245, and the surface finish of the upper surface is less than 0.1.

[0009] A simulation test bench for testing the properties of steel plates includes a test bench frame. The test bench frame includes a lower storage and support area and an upper equipment inclination area. There is a hinge connection with a hinge structure component between the lower storage and support area and the upper equipment inclination area. An experimental plate support platform driven by a bidirectional motor is installed in the upper equipment inclination area. The experimental plate support platform is installed on a portal bracket and includes a bottom rotating shaft and a clamping jaw installed on the bottom rotating shaft. The clamping jaw clamps an experimental plate with a length of 40 to 60 cm and a width of 40 to 60 cm.

[0010] The rotating shaft is installed at the top of the portal bracket via a bearing, and its input end is connected to the output shaft of the bidirectional motor. The experimental plate corresponds to the steel plate in terms of material and is made of one of molybdenum-vanadium alloy and Q235 / Q245, and the surface finish of the upper surface is less than 0.1. A stirring bucket, a sample box, and several experimental plates to be tested are placed in the lower storage and support area. The sample box is in the shape of a hollow cylindrical barrel with an inner diameter of less than 8 cm.

[0011] In specific implementation, the experimental plates to be tested are vertically clamped in the lower storage and support area.

[0012] In specific implementation, an angle support measurement mechanism is provided between the lower storage and support area and the upper equipment inclination area. The angle support measurement mechanism includes a sliding groove rod and a locking bolt. The top of the sliding groove rod is connected and installed at the bottom edge of the upper equipment inclination area via a rotating shaft. A sliding groove is provided on the sliding groove rod. The locking bolt passes through the sliding groove and a horizontal groove and is fixed on the upper edge of the lower storage and support area. Scale lines are provided on the sliding groove to indicate the installation angle between the lower storage and support area and the upper equipment inclination area.

[0013] In specific implementation, the bidirectional motor is also connected to a control mechanism. The control mechanism is provided with a display screen and buttons to control the opening and closing, rotation direction, and rotation speed of the bidirectional motor.

[0014] In specific implementation, the surface finish of the lower surface of the experimental plate is less than 0.16.

[0015] In specific implementation, a tensiometer positioning clip is clamped on the edge of the experimental plate. The head of the tensiometer is hung on the tensiometer positioning clip, and the tail end is embedded in the sample box. The tensiometer positioning clip includes a [type clip body and a roller slidably installed on the edge of the experimental plate inside the clip body.

[0016] In a specific implementation, the surface of the experimental board is divided into marking lines drawn by a marker or projected by an optical mechanism, and the optical mechanism includes a transverse light column emitting grid-shaped optical lines, and support columns on both sides of the transverse light column, and the support columns are clamped on the claws.

[0017] The beneficial effects of the present invention are:

[0018] Different from the existing technology, it is the first time to study the mud cake, and then find the most suitable steel sheet for the mud cake of the year based on the mud cake data. The further steel sheet is equivalent to adding a layer of tempered film on the cutter head to facilitate mud sliding. At the same time, the tempered film itself has a set of detection platforms, which can be adjusted and replaced in real time under different working conditions, greatly increasing the space for changing the properties of the cutter head;

[0019] Specifically, the blade installed on the front face of the cutter head, that is, the main working surface, can greatly reduce the adhesion of mud on the main cutting surface due to its superior low surface friction. At the same time, the blade is made of different materials to meet the requirements of different excavation soil layers. While ensuring the cost, it can maximize the avoidance of mud blockage on the steel blade due to reciprocating jumping.

[0020] The double-sided design of the test board is convenient for improving test efficiency and reducing the number of test boards;

[0021] The simulation test platform has a simple structure, occupies a small area, can be operated by connecting the circuit, has low requirements for the test site, and can basically produce results on the spot, with a short test time;

[0022] The cutting surface of the shield cutter head can be simulated at multiple angles to ensure the accuracy of the test results.

[0023] The operating console can measure multiple sets of data simultaneously and has various functions. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a front view of the structure of the present invention;

[0025] Figure 2 is a top view of the structure of the present invention;

[0026] Figure 3 It is a left side view of the structure of the present invention;

[0027] Figure 4 It is a right side view of the structure of the present invention;

[0028] Figure 5 It is a rear view of the structure of the present invention;

[0029] Figure 6 It is a rear view of another state of the present invention;

[0030] Figure 7 is the three-dimensional view in the present invention;

[0031] Figure 8 is the three-dimensional view from another angle in the present invention;

[0032] Figure 9 is the schematic diagram of the tool tip at the position of the blade involved;

[0033] Figure 10 is the three-dimensional view in another measurement state in the present invention

[0034] Figure 11 is the influence relationship curve of the inclination angle on the starting inclination angle of clay sliding;

[0035] Figure 12 is the influence relationship curve of the inclination angle of multi-materials on the starting inclination angle of clay sliding

[0036] Figure 13 is the fitting relationship between K and the critical rotational speed of the steel plate clay sliding;

[0037] Names of each component in the figure: 1. Front tool face; 2. Lower storage support area; 3. Upper equipment inclination area; 4. Hinge structure component; 5. Control mechanism;

[0038] 21. Experimental plate support platform; 22. Bidirectional motor; 23. Gantry bracket; 24. Bottom rotating shaft; 25. Claw; 26. Experimental plate; 27. Bearing;

[0039] 31. Locking bolt; 32. Slide groove; 33. Horizontal groove; 34. Experimental plate mounting clip; 35. Stirring barrel; 36. Sample box mounting disc;

[0040] 6. Sample box; 7. Tensiometer; 8. Tensiometer positioning clip; 9. Optical mechanism; 10. Plate; 11. Mud trace

[0041] 81. Clamping body; 82. Roller;

[0042] 91. Support column; 92. Transverse light column. Specific embodiments

[0043] The following describes the preferred embodiments of the present invention with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention and are not used to limit the present invention.

[0044] A steel plate for a shield tool tip, see Figures 1 to 9, which is installed on the shield cutter head, specifically clamped on the front cutting surface 1 of the cutter head on the cutter disc, has the same geometric dimensions as the front cutting surface of the cutter head on the cutter disc, and is connected to the front cutting surface via bolts. The steel plate is made of one of molybdenum-vanadium alloy and Q235 / Q245, and the surface finish of the upper surface is less than 0.1.

[0045] It also relates to a simulation test bench for testing the properties of steel plates, including a test bench frame. The test bench frame includes a lower storage and support area 2 and an upper equipment inclination area 3. There is a hinge connection with a hinge structure component 4 between the lower storage and support area and the upper equipment inclination area. An experimental plate support platform 21 driven by a bidirectional motor 22 is installed in the upper equipment inclination area. The experimental plate support platform 21 is installed on a portal bracket 23 and includes a bottom rotating shaft 24 and a clamping jaw 25 installed on the bottom rotating shaft 24. The clamping jaw 25 clamps an experimental plate 26 with a length of 40 to 60 cm and a width of 40 to 60 cm.

[0046] The rotating shaft 24 is installed at the top of the portal bracket via a bearing 27, and its input end is connected to the output shaft of the bidirectional motor. The experimental plate 26 corresponds to the steel plate material and is made of one of molybdenum-vanadium alloy and Q235 / Q245, and the surface finish of the upper surface is less than 0.1. A stirring bucket 35, a sample box 6 and several experimental plates to be tested are placed in the lower storage and support area. The sample box 6 is in the shape of a hollow cylindrical bucket with an inner diameter of less than 8 cm.

[0047] The experimental plates to be tested are vertically clamped in the lower storage and support area.

[0048] An angle support measurement mechanism is provided between the lower storage and support area and the upper equipment inclination area. The angle support measurement mechanism includes a sliding groove rod and a locking bolt 31. The top of the sliding groove rod is connected and installed at the bottom edge of the upper equipment inclination area via a rotating shaft. A sliding groove 32 is provided on the sliding groove rod, and a horizontal groove 33 is provided on the bottom frame of the upper equipment inclination area. The locking bolt passes through the sliding groove and the horizontal groove and is fixed on the upper edge of the lower storage and support area. Scale lines are provided on the sliding groove 32 to indicate the installation angle between the lower storage and support area and the upper equipment inclination area.

[0049] The bidirectional motor 22 is also connected to a control mechanism 5. The control mechanism is provided with a display screen and buttons to control the opening and closing, rotation direction and rotation speed of the bidirectional motor.

[0050] The surface finish of the lower surface of the experimental plate is less than 0.16.

[0051] A tensiometer positioning clip is clamped on the edge of the experimental plate. The head of the tensiometer 7 is hung on the tensiometer positioning clip 8, and the tail end is embedded in the sample box 6. The tensiometer positioning clip includes a U-shaped clip body and a roller 72 slidably installed inside the clip body on the edge of the experimental plate.

[0052] The surface of the experimental board is divided by marked lines drawn with a marker pen or marked lines projected by an optical mechanism 9. The optical mechanism 9 includes a transverse light column that emits a grid-shaped optical line, and support columns 91 on both sides of the transverse light column 92. The support columns 91 are clamped on the clamping claws 25. The clamping form is face-to-face clamping.

[0053] This embodiment also relates to a test method followed when the simulation test bench for testing the properties of steel plates is working, including the following steps:

[0054] (1) Clay preparation: (a) Weigh 300 g of natural clay or simulated shield-site cost clay and pour it into a stirring bucket; (b) Weigh 20 g of grade II bentonite and pour it into the above stirring bucket, and stir evenly; (c) Measure 100 ml of tap water with a measuring cylinder, slowly pour it into the above stirring bucket, and stir evenly; (5) Put the prepared clay into a dry sample box and weigh the total mass of the clay and the sample box;

[0055] (2) Clay sliding start angle test: (a) Adjust the multi-functional steel plate clamping device to first adjust the installation inclination angle of the experimental board to 0°, and then place the sample box containing clay on the upper part of the steel plate surface; (b) Through the control system of the multi-functional steel plate clamping device, gradually adjust the rotation inclination angle of the steel plate until the clay starts to rotate on the steel plate surface, record the sliding start angle, and at the same time measure the pulling force of the tensiometer, and convert it into the frictional force of the steel plate on the clay through calculation; (c) Use the same steps to adjust the installation inclination angle of the steel plate to 5° and 10° respectively, conduct repeated tests, and record the data to obtain the clay start angle and start pulling force test data;

[0056] (3) Data analysis, obtain the influence of the installation inclination angle on the start angle, and select the steel plate material suitable for the on-site working conditions as the cutter

[0057] The moving pair connection ensures that the roller group can move linearly on the substrate, so as to adjust the distance between the rollers in the roller group to adapt to the measurement of motor stators and rotors of different sizes.

[0058] During the working process, two different types of mirror steel plates are used, namely Q345 steel plates and molybdenum-vanadium alloys. Each steel plate has two different surface finishes on the front and back. The multi-functional steel plate clamping device is used to adjust the steel plates to different angles and fix them. Record the starting angle of the clay sliding on the steel plate surface, the speed of sliding, and the amount of remaining mud. At the same time, use a tensiometer to measure the pulling force when the clay slides and convert it into the sliding friction force of the steel plate. First, make the clay or take samples of the slurry soil discharged from the construction layer, and then measure it on different experimental plates, measure its sliding angle, especially the static friction angle and the sliding pulling force. After determining the most suitable experimental plate material, select steel plates of the same material and install them on the blade, which can complete the conversion from experiment to actual combat, achieve the stable output of the slurry during tunneling, and prevent material blockage caused by jolting.

[0059] The following takes a single working process as an example:

[0060] First, prepare the clay: (1) Weigh 300 g of natural clay and pour it into the mixing bucket; (2) Weigh 20 g of grade II bentonite and pour it into the above mixing bucket and stir evenly;

[0061] (3) Measure 100 ml of tap water with a measuring cylinder and slowly pour it into the above mixing bucket and stir evenly; (4) Put the prepared clay into a dry sample box and weigh the total mass of the clay and the sample box.

[0062] Secondly, conduct the test of the starting angle of clay sliding.

[0063] During work, adjust the inclination angle area of the upper equipment to first adjust the installation inclination angle of the specially processed experimental plate to 0°, and then place the sample box containing the clay on the upper part of the steel plate surface; (2) Through the control system, gradually adjust the rotation inclination angle of the steel plate until the clay starts to rotate on the steel plate surface, record the starting angle of sliding, and at the same time measure the pulling force of the tensiometer and convert it into the friction force of the steel plate on the clay through calculation; (3) Use the same steps to adjust the installation inclination angle of the steel plate to 5° and 10° respectively, conduct repeated tests, and record the data. The specific data is shown in Table 1.

[0064] Table 1 Test data of clay starting angle and starting pulling force

[0065]

[0066] After that, conduct data analysis:

[0067] Based on the experimental data, the influence of the installation inclination angle on the starting angle of clay sliding was analyzed. The research found that under the experimental conditions, as the installation inclination angle increases, the starting inclination angle of clay sliding gradually decreases, that is, as the installation inclination angle increases, it is more and more beneficial for the clay to slide off the steel plate surface. Specifically, as Figure 11As shown, taking Q345 steel plate, Ra0.012 as a representative, a curve showing the influence of installation inclination angle on clay sliding starting inclination angle is drawn.

[0068] Going further, we can analyze the influence of steel properties on the starting angle:

[0069] The characteristics of steel in this study mainly include the type of steel and the influence of finish. According to data analysis, e.g. Figure 12 As shown in the figure, by comparing the curve Q345 (Ra0.012) with the curve Q345 (Ra0.2), and the molybdenum-vanadium alloy curve (Ra0.012) with the curve (Ra0.2), it can be concluded that for the same steel, when the finish is different, it has a greater impact on the starting angle of clay sliding, that is, the better the finish, the smaller the starting angle under the same conditions, that is, under the same sliding length, it can buy more time for clay sliding on the steel plate; by comparing the curve Q345 (Ra0.012) with the molybdenum-vanadium alloy curve (Ra0.012), and the curve Q345 (Ra0.2) with the molybdenum-vanadium alloy curve (Ra0.2), it can be concluded that for different steels with the same finish, the molybdenum-vanadium alloy steel plate has a better anti-mud cake effect than the Q345 steel plate. The molybdenum-vanadium alloy can be Cr12, Cr16, Cr20, and Q235 can also be replaced by Q225, Q245.

[0070] Furthermore, the influence of steel properties on the sliding friction of clay was analyzed.

[0071] Since the sliding friction force of the steel plate on the clay in the indoor test is not easy to obtain directly, the method of directly measuring the tensile force when the clay slides is adopted. 下滑力 =F 拉力 +F 摩擦力 , and the friction force when the clay slides down can be converted. That is, when the sliding force is constant, the greater the measured pulling force, the smaller the friction force when the clay slides down, and the less likely it is to form mud cakes. For the convenience of calculation, the analysis was carried out under the condition of installation inclination angle of 0°. The total mass of the clay box sample box is 286g. The specific tensile test data and calculated friction force are shown in Table 2. By comparing the friction data of Q345 (Ra0.012) and Q345 (Ra0.2), as well as the friction data of molybdenum-vanadium alloy (Ra0.012) and molybdenum-vanadium alloy (Ra0.2), it can be seen that for the same steel plate, the higher the smoothness, the smaller the friction force; by comparing the friction data of Q345 (Ra0.012) and molybdenum-vanadium alloy (Ra0.012), as well as the friction data of Q345 (Ra0.2) and molybdenum-vanadium alloy (Ra0.2), it can be seen that when the smoothness is the same, the friction force of the clay on the molybdenum-vanadium alloy steel plate is less than that on the Q345 steel plate.

[0072] Table 2 Statistical Table of Friction Forces of Different Materials and Smooth Surfaces at an Installation Inclination of 0°

[0073]

[0074] Furthermore, a test analysis of the influence of cutter head speed on the mud cake was carried out.

[0075] 5.2.1 Test Steps

[0076] (1) Weigh the prepared clay, fix the contact area between the clay and the steel plate, ensure that the contact area remains the same for each test, and then press on the clay with the same force to make the clay adhere to the steel plate;

[0077] (2) Adjust the multi-functional steel plate clamping device to rotate at different speeds, and record the sliding condition of the clay on the steel plate;

[0078] (3) Weigh different masses of clay and repeat the above test.

[0079] 5.2.2 Data Analysis

[0080] Through the above tests, data on the influence of cutter head speed on the sliding of different masses of clay for the same steel plate and the same finish were obtained, and the test phenomena were recorded. The test data are shown in Table 3 specifically. From the data analysis in the table, it can be seen that for a fixed mass per unit area, the faster the steel plate rotates, the less conducive it is to the sliding of the clay, and the easier it is to accumulate and form a mud cake. The specific phenomenon in the test is that as the steel plate speed increases, the clay will swing back and forth without falling off during the rotation from 0 to 360°. When the speed of the steel plate is below the critical speed, the soil will slide off from the edge of the steel plate during the rotation from 0 to 180°.

[0081] Table 3 Statistical Table of Data on the Influence of Steel Plate Speed on Clay Sliding

[0082]

[0083] Since the contact area between different masses of clay and the steel plate is the same, a corresponding relationship can be formed between the mass of clay per unit area and the steel plate speed to provide a parameter basis for setting the penetration degree and cutter head speed of the on-site shield machine. In this scheme, the contact area between the clay and the steel plate is fixed at 50 cm 2 , and the mass of clay per unit area is represented by the symbol K. Based on the data in Table 3, a one-to-one corresponding relationship between K and the critical speed of clay sliding on the steel plate is formed, as shown in Table 4 specifically. Figure 13 is the fitting relationship between K and the critical speed of clay sliding on the steel plate.

[0084] Table 4 Corresponding Relationship between K and the Critical Speed of Clay Sliding on the Steel Plate

[0085]

[0086] Based on the data in Table 4, the data is fitted and the processing results are as follows Figure 13 As shown, the curve is approximately a straight line.

[0087] In the specific work, boards are installed above the lower storage support area to receive the fallen mud cakes.

[0088] Finally, experimental conclusions and suggestions are drawn for the case where clay is used as the material.

[0089] (1) For the same steel plate with different installation angles, the larger the installation angle, the smaller the starting angle of clay sliding, which is more conducive to the discharge of clay. It is recommended to increase the slope angle of the steel at the cutter head opening appropriately while ensuring the strength of the cutter head opening.

[0090] (2) For the same type of steel plate with different finishes, the higher the surface finish, the smaller the clay sliding start angle under the same installation inclination, which is more conducive to the discharge of clay layer debris. It is recommended to install high-smoothness mirror steel plates on the rough steel plate surface at the opening of the existing shield machine cutterhead and carry out field tests.

[0091] (3) Through the comparison of Q345 steel plate and molybdenum-vanadium alloy steel plate test, molybdenum-vanadium alloy steel plate has better performance than Q345 steel plate in preventing mud cake, but compared with the rough surface of traditional steel, both steels can show obvious advantages. It is recommended to install two kinds of steel plates at the position of the cutter head support on site for testing to determine which material is more economical and reasonable to use in the later stage.

[0092] (4) The cutterhead speed has a great influence on the sliding of clay on the steel plate. For clay with a certain unit area mass, when the cutterhead speed is below the critical speed, the clay can slide smoothly from the edge of the steel plate. When the cutterhead speed is above the critical speed, the clay will swing left and right with the 360° rotation of the steel plate and will not easily slide from the surface of the steel plate. It is recommended to adjust the cutterhead speed in time according to the amount of slag when excavating to a stratum that is prone to mud cake formation.

[0093] In specific implementation, by following the above method, targeted conclusions can be drawn for different soil types, and thus, combined with cost control, the most suitable material can be selected as steel sheets to be laid on the main cutting surface of the shield cutting to adjust and improve the channel conditions of mud retention.

[0094] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A simulation test bench for testing the characteristics of steel plates, which is used to test the anti-caking mud cake steel plates for shield cutter heads. It is characterized in that: The anti-caking mud cake steel plate for the shield cutter head is installed on the shield cutter head, specifically clamped on the front cutting surface of the cutter head on the cutter disc, with the same geometric dimensions as the front cutting surface of the cutter head on the cutter disc, and is connected to the front cutting surface by bolts. The steel plate is made by modifying one of molybdenum-vanadium alloy, Q235 or Q245, and the surface finish Ra of the upper surface is less than 0.

1. The simulation test bench includes a test bench frame, which includes a lower storage and support area and an upper equipment inclination area. There is a hinge connection with a hinge structure component between the lower storage and support area and the upper equipment inclination area. An experimental plate support platform driven by a two-way motor is installed in the upper equipment inclination area. The experimental plate support platform is installed on a portal bracket and includes a bottom rotating shaft and a clamping jaw installed on the bottom rotating shaft. The clamping jaw clamps an experimental plate with a length of 40 to 60 cm and a width of 40 to 60 cm. The bottom rotating shaft is installed at the top of the portal bracket through a bearing, and its input end is connected to the output shaft of the two-way motor. The experimental plate corresponds to the material of the steel plate and is made by modifying one of molybdenum-vanadium alloy, Q235 or Q245, and the surface finish Ra of the upper surface is less than 0.

1. A stirring bucket, a sample box and several experimental plates to be tested are placed in the lower storage and support area. The sample box is in the shape of a hollow cylindrical barrel with an inner diameter of less than 8 cm. An angle support measurement mechanism is provided between the lower storage and support area and the upper equipment inclination area. The angle support measurement mechanism includes a chute rod and a locking bolt. The top of the chute rod is connected and installed at the bottom edge of the upper equipment inclination area through a rotating shaft. A chute is provided on the chute rod, and a horizontal groove is provided on the bottom border of the upper equipment inclination area. The locking bolt passes through the chute and the horizontal groove and is fixed on the upper edge of the lower storage and support area. Scale lines are provided on the chute to indicate the installation angle between the lower storage and support area and the upper equipment inclination area.

2. The simulation test bench for testing the characteristics of steel plates according to claim 1, It is characterized in that: The experimental plates to be tested are vertically clamped in the lower storage and support area.

3. The simulation test bench for testing the characteristics of steel plates according to claim 1, It is characterized in that: The two-way motor is also connected to a control mechanism, and the control mechanism is provided with a display screen and buttons to control the opening and closing, rotation direction and rotation speed of the two-way motor.

4. The simulation test bench for testing the characteristics of steel plates according to claim 1, It is characterized in that: The surface finish Ra of the lower surface of the experimental plate is less than 0.

16.

5. The simulation test bench for testing the characteristics of steel plates according to claim 1, It is characterized in that: A tensiometer positioning clip is clamped on the edge of the experimental plate. The head of the tensiometer is hung on the tensiometer positioning clip, and the tail end is embedded in the sample box. The tensiometer positioning clip includes a [type clip body and a roller slidably installed on the edge of the experimental plate in the clip body.

6. The simulation test bench for testing the characteristics of steel plates according to claim 1, It is characterized in that: The surface of the experimental board is divided by marked lines drawn with a marker pen or marked lines projected by an optical mechanism. The optical mechanism includes a transverse light column that emits grid-shaped optical lines and support columns on both sides of the transverse light column. The support columns are clamped on the claws.

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