Device and method for testing mechanical properties of substation frame columns under simulated fire

Abstract

The present invention provides a device and method for testing the mechanical properties of a substation frame column under a simulated fire. The set is set on the top of the substation frame column to form a solid surface on the left and right sides; the constraint frame clamps the solid surfaces on both sides of the set; the measurement system includes a displacement sensor, a temperature sensor, and a host computer. The fire test furnace includes a furnace cavity, a fixed base is located in the furnace cavity, and the top of the substation frame column passes through the top of the furnace cavity and is located outside the furnace cavity. The test device involved in the present invention is simple to make and easy to assemble. Each component can be welded on site for easy transportation. The constraint frame is used to simulate the constraint of the top of the frame column in the actual application scenario, complete the test of the influence of the vertical force on the frame column, and at the same time, load application and prevention of lateral displacement of the component are achieved. The design of the set provides a force application point for the constraint frame, without changing the structure of the substation frame column itself, thereby improving the authenticity of the test. The column body of the substation frame column is placed in the experimental furnace, which can truly simulate the heating condition of the lower half of the structural column during a fire.

Description

Technical Field

[0001] The invention relates to the technical field of time delay of electric power facilities, in particular to a device and method for testing mechanical properties of a substation frame column under simulated fire. Background Art

[0002] Large power transformers running in power grids are generally oil-immersed power transformers, and the raw materials used include transformer oil, insulating paper, wooden pads or pressure plates, etc. Although the probability of a transformer fire is low, once a fire occurs, it will damage the transformer and its surrounding structures. The frame structure that supports power equipment and bears the tension of the wires will be affected by the fire and heat up rapidly. This frame structure is mostly made of steel. The mechanical properties of the frame columns close to the fire source will decrease first, especially the bearing capacity will gradually decrease, and the supported power equipment and wires will be engulfed by the fire, causing greater economic losses. Therefore, conducting research on the fire resistance of substation frame columns is of great significance to avoid or reduce the damage to the frame structure in a fire, and conducting scientific experiments is an essential research method.

[0003] The substation frame column is generally a herringbone frame column. The current testing method generally adopts a 1:1 simulation test, which is time-consuming, material-consuming and labor-consuming. Another method is to detect the nodes of the herringbone frame column. The test results cannot reflect the overall mechanical properties of the herringbone frame column and have little reference value. For example, the Chinese patent with announcement number CN 205642868 U discloses a herringbone column node bidirectional load co-action performance test device, including an external frame fixing device, a specimen loading device is arranged in the external frame fixing device, a specimen fixing device is arranged at the bottom of the specimen loading device, and the specimen loading device is connected to a data acquisition system. The horizontal load of the utility model test device is loaded by an actuator, and the stroke of the actuator can be flexibly adjusted. High-precision control is achieved through a computer during the loading process. At the same time, a base and a pressure beam are arranged at the bottom of the specimen, which can effectively prevent the specimen from moving during the test, and the test accuracy is high. The utility model test device is easy to disassemble and assemble, safe and reliable, and overcomes the problem of large error in the horizontal force provided by the jack and uneven force on the end plate of the herringbone column node. Although the utility model can test the nodes of the herringbone frame columns, it cannot reflect the overall mechanical properties of the frame columns. In actual scenarios, the environment in which the herringbone frame columns are located is complex, and not only the nodes are subjected to loads. The frame columns may reduce or lose their mechanical properties due to the high temperature radiation from the surrounding fire or even being in the fire area. Therefore, it is very necessary to test the overall formation of the herringbone structural columns.

[0004] However, since the top of the herringbone structural column is fixed to the truss beam in actual scenarios and has horizontal constraint force, it is urgent to solve the problem of how to meet the stress conditions of the herringbone structural column in actual scenarios and the purpose of testing the overall mechanics of the herringbone structural column during testing. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a method for simulating the actual restraint of a transformer substation frame column under fire conditions and to conduct an overall mechanical property test on the frame column.

[0006] The present invention solves the above technical problems through the following technical means:

[0007] A device for testing the mechanical properties of a substation frame column under simulated fire, comprising a vertical reaction frame (1), a transverse reaction frame (2), a restraint frame (3), a set (4), a fixed base (5), a measurement system, and a fire test furnace (8); the transverse reaction frame (2) is fixed to the upper part of the vertical reaction frame (1), the restraint frame (3) is fixed to the lower part of the transverse reaction frame (2), the set (4) is sleeved on the top of the substation frame column (10) to form a solid surface on the left and right sides; the restraint frame (3) clamps the solid surfaces on both sides of the set (4); a first actuator (6) is fixed to the lower part of the transverse reaction frame (2) to apply a vertical load to the substation frame column (10); the column foot of the substation frame column (10) is fixed to the fixed base (5);

[0008] The measurement system comprises a displacement sensor (71), a temperature sensor (72), and a host computer; the displacement sensor (71) is fixed on the restraint frame (3) to measure the displacement of the top of the substation frame column (10); there are a plurality of temperature sensors (72) distributed at different positions of the substation frame column (10); the displacement sensor (71) and the temperature sensor (72) are both communicatively connected to the host computer;

[0009] The fire test furnace (8) comprises a furnace cavity, the fixed base (5) is located in the furnace cavity, and the top of the substation frame column (10) passes through the top of the furnace cavity and is located outside the furnace cavity.

[0010] The test device involved in the present invention is simple to manufacture and easy to assemble. Each component can be welded on site for easy transportation. The constraint frame is used to simulate the constraint condition of the top of the frame column in the actual application scenario. By setting the constraint frame, the top of the frame column can be left empty for the actuator to load the vertical force, complete the test of the influence of the vertical force on the frame column, and at the same time, load application and prevention of lateral displacement of the component are achieved. The design of the set provides a force application point for the constraint frame, without changing the structure of the substation frame column itself, thereby improving the authenticity of the test. Placing the column body of the substation frame column in the experimental furnace can realistically simulate the heating condition of the lower half of the structural column during a fire.

[0011] Furthermore, the restraining frame (3) comprises two fixing frames (31); the two fixing frames (31) are detachably fixed on the lower surface of the transverse reaction frame (2), and horizontal support rods (32) are fixed on the opposite surfaces of the two fixing frames (31); the ends of the two support rods (32) are respectively abutted against two solid surfaces of the set (4), and the first actuator is fixed on the transverse reaction frame, with the output end facing the top of the set (4) to apply vertical force to the substation frame column (10).

[0012] Furthermore, a steel hemisphere (33) is fixed to the end of the support rod (32), and the spherical surface of the steel hemisphere (33) abuts against the solid surface.

[0013] Furthermore, one end of the support rod (32) is provided with an external thread, and a sleeve (34) that is threadably matched with the support rod (32) is fixed at a corresponding position of the fixing frame.

[0014] Furthermore, the set (4) comprises an inverted U-shaped groove, and the inverted U-shaped groove is buckled on the top of the substation frame column (10).

[0015] Furthermore, the top of the furnace cavity is a furnace cover (83), and the furnace cover (83) is divided into a left cover and a right cover. A gap is formed between the left cover and the right cover for the substation frame column (10) to pass through, and the gap is sealed with fireproof cotton.

[0016] Furthermore, the fire test furnace (8) comprises a combustion furnace (81) and a raised layer (82); the top of the combustion furnace (81) is open, and the raised layer (82) is built upward along the furnace wall of the combustion furnace (81) using fireproof bricks to a set height; the furnace cover (83) blocks the top of the raised layer (82); a plurality of flame nozzles and flues are opened on the side wall of the combustion furnace (81); and the flame nozzles are connected to the burner.

[0017] Furthermore, the fixed base (5) comprises a concrete block and bolts embedded in the concrete block; the column feet of the two substation frame columns are fixed with fixing plates, the fixing plates are provided with screw holes, and the substation frame columns are fixed by the screw holes and the bolts.

[0018] Corresponding to the above device, the present invention also provides a method for testing the mechanical properties of a substation frame column, which is applied to the above device and is characterized in that it includes the following steps:

[0019] Processing test structures: according to the test purpose, processing and manufacturing a scaled model of the substation frame column (10), processing a restraining frame (3), a set (4), a fixed base (5), and a fire test furnace 8;

[0020] Fix the two ends of the transverse reaction frame (2) to the vertical reaction frame (1), then fix the first actuator to the transverse reaction frame (2), hoist the fixed base (5) into the fire test furnace 8, fix the column foot of the substation frame column to the fixed base (5), and ensure that the substation frame column is consistent with the center of the first actuator; put the set (4) on the top of the substation frame column, then hoist the restraint frame (3) to the specified position for installation and fixation, finally install the motion sensor and temperature sensor (72), and connect them to the upper computer for communication, then close the left and right sliding doors, and seal the door gap with fireproof cotton. The flame nozzle of the fire test furnace 8 is connected to our flame supply device. After the installation and debugging are completed, ignition can be started to start the test.

[0021] Furthermore, a plumb bob or a thin rope is used to mark the center of the first actuator and the fixed base (5) downward.

[0022] The advantages of the present invention are:

[0023] The test device involved in the present invention is simple to manufacture and easy to assemble. Each component can be welded on site for easy transportation. The constraint frame is used to simulate the constraint condition of the top of the frame column in the actual application scenario. By setting the constraint frame, the top of the frame column can be left empty for the actuator to load the vertical force, complete the test of the influence of the vertical force on the frame column, and at the same time, load application and prevention of lateral displacement of the component are achieved. The design of the set provides a force application point for the constraint frame, without changing the structure of the substation frame column itself, thereby improving the authenticity of the test. Placing the column body of the substation frame column in the experimental furnace can realistically simulate the heating condition of the lower half of the structural column during a fire.

[0024] The limit frame and the transverse reaction beam can be detachably fixed, which is convenient for disassembly and reuse. The distance between the two fixing frames can also be adjusted to facilitate the applicability of specimens with different parameters within the design range, while preventing manufacturing errors and installation errors of the specimens.

[0025] The use of a steel hemisphere to abut the sleeve can reduce friction. In addition, the solid surface of the sleeve can provide a constraint surface of a certain height when the frame column is deformed. Even if the height of the frame column decreases, the constraint force will not disappear.

[0026] The displacement sensor and temperature sensor record the changes of displacement with time and temperature in real time, providing effective data for subsequent analysis and summary.

[0027] The combustion furnace combined with the heightened layer is used as the experimental furnace. According to different objects to be tested, the heightened layer can be built on the basis of the combustion furnace's own height. The height of the heightened layer can be freely controlled, and it can flexibly cope with various objects to be tested. It is low in cost and easy to operate. In particular, the furnace cover adopts the left and right cover design. In the initial stage, the left and right covers can be removed to expose the furnace cavity, which is convenient for placing the fixed base and frame columns, and then the left and right covers are pressed, and the gap between the left and right covers is sealed with fireproof cotton to ensure the fire simulation of the furnace cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall structure of the testing device in an embodiment of the present invention;

[0029] Figure 2 It is a schematic diagram of the installation structure of the top and the set, the bottom and the fixed base of the substation frame column in an embodiment of the present invention;

[0030] Figure 3 for Figure 1 A schematic diagram of the structure from above without the transverse reaction beam and the vertical reaction beam;

[0031] Figure 4 It is a schematic diagram of the exploded structure of a single fixing frame and the support rod, sleeve and steel hemisphere fixed thereon in an embodiment of the present invention. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described in combination with the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. 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.

[0033] This embodiment provides a mechanical performance testing device for a substation frame column under a simulated fire, which is used to perform an overall mechanical performance test on a scaled-down substation frame column 10. Figure 1 , Figure 2 , Figure 3 As shown, it includes a vertical reaction frame 1, a transverse reaction frame 2, a constraint frame 3, a set 4, a fixed base 5, a fire test furnace 8, and a measurement system; the transverse reaction frame 2 is fixed to the upper part of the vertical reaction frame 1, the constraint frame 3 is fixed to the lower part of the transverse reaction frame 2, and the set 4 is sleeved on the top of the substation frame column 10 to form a solid surface on the left and right sides; the constraint frame 3 clamps the solid surfaces on both sides of the set 4; the first actuator 6 and the transverse loading device are respectively fixed to the transverse reaction frame 2 and the vertical reaction frame 1 to apply vertical load and transverse load to the substation frame column 10; the column foot of the substation frame column 10 is fixed to the fixed base 5;

[0034] The measurement system includes a displacement sensor 71, a temperature sensor 72, and a host computer; the displacement sensor 71 is fixed on the constraint frame 3 to measure the displacement of the top of the substation frame column 10, and there are multiple temperature sensors 72 distributed at different positions of the substation frame column 10. The displacement sensor 71 and the temperature sensor 72 are both communicatively connected to the host computer.

[0035] In this embodiment, Figure 3, Figure 4 As shown, the restraint frame 3 includes two fixing frames 31; the two fixing frames 31 are fixed to the lower surface of the transverse reaction frame 2, and are generally fixed by bolts, which is convenient for disassembly and reuse and adjustment of the spacing between the two fixing frames 31. Horizontal support rods 32 are fixed to the opposite surfaces of the two fixing frames 31; the ends of the two support rods 32 are respectively abutted against the two solid surfaces of the set 4, and the first actuator is fixed on the transverse reaction frame, with the output end facing the top of the set 4, applying a vertical force to the substation frame column 10. In order to reduce the influence of the friction between the support rod 32 and the set 4 on the deformation of the substation frame column, the present embodiment also welds a steel hemisphere 33 at the end of the support rod 32, and lubricating oil is applied on the solid surface. Of course, a sphere can also be rotatably connected to the end of the support rod 32, and the sphere and the solid surface can roll together to reduce friction. In this embodiment, the steel hemisphere 33 and the support rod 32 can be welded, but in order to adjust the distance between the two steel hemispheres 33, the steel hemisphere 33 and the support rod 32 can be connected by threads, and the steel hemisphere can be rotated as a whole to achieve close contact with the solid surface. An external thread can also be provided at one end of the support rod 32, and a sleeve 34 that is threadedly matched with the support rod 32 is fixed at the corresponding position of the fixed frame, and the tightness of the contact between the steel hemisphere 33 and the set 4 is adjusted by the threaded match between the support rod 32 and the threaded sleeve 34. In addition, the sleeve 34 is fixed to the fixed frame 31 by bolts, and the height of the contact point between the steel hemisphere 33 and the set 4 can be adjusted by adjusting the height of the sleeve 34.

[0036] In this embodiment, the fixing frame 31 is a tripod, which is generally a right-angle tripod welded with steel. One right-angle side is fixed to the lateral reaction frame 2 by bolts, and the other right-angle side is used to fix the support rod 32.

[0037] In this embodiment, there are two displacement sensors 71, which are respectively fixed on two right-angle tripods by welding or magnetic attraction. Temperature sensors 72 are arranged at different heights of the two columns of the substation frame column 10 to detect the temperature at different heights, so as to analyze the relationship between the deformation amount and temperature at different heights of the substation frame column 10.

[0038] Since the top of the substation frame column has a small area on both sides and a hollow area, it is necessary to use a set 4 to increase the solid surface on both sides to facilitate the force of the restraining frame 3. The set 4 is an inverted U-shaped groove, buckled on the top of the substation frame column 10, so that the set 4 moves with it during the deformation of the substation frame column 10, the set 4 can be welded to the top of the substation frame column 10 or bolted.

[0039] The fixed base 5 includes a prefabricated concrete block and a plurality of bolts embedded in the concrete block, generally 4 bolts; the column feet of the two substation frame columns are fixed with a fixing plate 101, which can be a flange or a steel plate. The fixing plate 101 is provided with screw holes that are the same as the number of bolts, and the two column feet of the substation frame column correspond to a group of bolts respectively, and are fixed by the screw holes and the bolts.

[0040] In this embodiment, Figure 1 As shown, the fire test furnace 8 includes a combustion furnace 81, a heightening layer 82, and a furnace cover 83. The combustion furnace 81 is a conventional combustion furnace 81, but in order to target the substation frame columns of different models and sizes, the height of the combustion furnace 81 in this embodiment is generally relatively short, and the heightening layer 82 is used to meet the requirements of different test piece heights. Therefore, in this embodiment, the top of the combustion furnace 81 is open, and the heightening layer 82 is built upward to a certain height with refractory bricks on the furnace wall of the combustion furnace 81. The height is controllable and flexible. The heightening layer 82 is also wrapped with weather-resistant fiber felt and fixed with steel nails. Then the furnace cover 83 is fixed on the top of the heightening layer 82. In this embodiment, the furnace cover 83 is divided into a left sliding cover and a right sliding cover. The sliding direction of the left and right sliding covers is perpendicular to the plane where the substation frame column is located. The gap between the left and right sliding covers is for the substation frame column to pass through, and the gap is tightly sealed with fireproof cotton. The sliding structure of the left and right slide covers is specifically a track fixed on the top of the heightened layer 82, and the lower surface of the left and right slide covers is provided with slide covers that cooperate with the track, so as to achieve sliding (the slide rail structure is a conventional structure, which is not described in detail and is not shown in the figure). Of course, the left and right slide covers can also be placed directly on the top of the heightened layer 82. For the sake of safety, some heavy objects can be placed on the top of the slide covers to prevent them from being pushed out by the high-pressure gas in the furnace chamber. In this embodiment, a flame nozzle 811 and a smoke exhaust hole 812 are opened on the furnace wall of the combustion furnace 81. There are multiple flame nozzles 811, which are evenly distributed around the combustion furnace 81 and connected to the burner to continuously supply flames to the furnace chamber to simulate a fire scene.

[0041] This embodiment also provides a method for testing the mechanical properties of a substation frame column, which is applied to the above-mentioned device and includes the following steps:

[0042] Processing test construction, according to the purpose of the test, processing and manufacturing the scaled model of the substation frame column 10, processing the constraint frame 3, the set 4, and the fixed base 5; the substation frame column 10 uses the same material as the actual substation frame column 10. When manufacturing, it is necessary to weld a flange or steel plate at the designed column foot, and reserve bolt holes for later connection with the fixed base 5. The constraint frame 3 and the set 4 are both welded with steel, and the size is calculated. The fixed base 5 is prefabricated with cement concrete, which is resistant to high temperature, and the embedded bolts must be adapted to the two right-angle spacings of the substation frame column 10.

[0043] The fire test furnace 8 is modified. According to the height of the test piece to be tested, refractory bricks are used to build a double-layer wall upward on the furnace wall of the combustion furnace 81 to a set height, and then a double-layer refractory fiber felt is used to surround the masonry cavity and fixed with steel nails.

[0044] Fix the two ends of the lateral reaction frame 2 to the vertical reaction frame 1, then fix the first actuator to the lateral reaction frame 2, hoist the fixed base 5 to the set position, and use a plumb bob or a thin rope to mark the first actuator 6 and the center of the fixed base 5. Fix the column foot of the substation frame column to the fixed base 5; use a level to test whether the top of the substation frame column 10 is horizontal. If it is uneven, use epoxy resin mixed with fine sand to level it. Start the actuator, test whether the loading system is in normal use, and perform preliminary debugging. Set the set 4 on the top of the substation frame column, then hoist the constraint frame 3 to the specified position and install it, and finally install the mobile sensor and temperature sensor 72, communicate with the host computer, and perform preliminary debugging. After debugging, start the loading test. Through the displacement sensor 71 set, the change process of the displacement of the top of the frame column can be monitored, so as to grasp the deformation of the specimen. Through the temperature sensor 72 arranged on the specimen, the relationship between the deformation position of the specimen at different heights and the temperature can be grasped. Finally, analyze and process the test data and summarize the test phenomena.

[0045] If a test is required for complex stress conditions, a second actuator (not shown in the figure) needs to be installed. The second actuator can be fixed on the vertical reaction frame 1, and the force application point can be the top of the substation frame column 10 or other positions, which can be set as needed. The first actuator and the second actuator can be started simultaneously or in batches to simulate different stress conditions.

[0046] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A mechanical properties testing device for substation frame columns under simulated fire, characterized in that: The invention comprises a vertical reaction frame (1), a transverse reaction frame (2), a restraint frame (3), a set (4), a fixed base (5), a measuring system, and a fire test furnace (8); the transverse reaction frame (2) is fixed to the upper part of the vertical reaction frame (1), the restraint frame (3) is fixed to the lower part of the transverse reaction frame (2), the set (4) is sleeved on the top of the transformer substation frame column (10) to form a solid surface on the left and right sides; the restraint frame (3) clamps the solid surfaces on both sides of the set (4); the first actuator (6) is fixed to the lower part of the transverse reaction frame (2) to apply a vertical load to the transformer substation frame column (10); the column foot of the transformer substation frame column (10) is fixed to the fixed base (5); The measurement system comprises a displacement sensor (71), a temperature sensor (72), and a host computer; the displacement sensor (71) is fixed on the restraint frame (3) to measure the displacement of the top of the substation frame column (10); there are a plurality of temperature sensors (72) distributed at different positions of the substation frame column (10); and the displacement sensor (71) and the temperature sensor (72) are both communicatively connected to the host computer; The fire test furnace (8) comprises a furnace cavity, the fixed base (5) is located in the furnace cavity, and the top of the substation frame column (10) passes through the top of the furnace cavity and is located outside the furnace cavity; The restraining frame (3) comprises two fixing frames (31); the two fixing frames (31) are detachably fixed to the lower surface of the transverse reaction frame (2); and horizontal support rods (32) are fixed to the opposite surfaces of the two fixing frames (31); the ends of the two support rods (32) are respectively in contact with two solid surfaces of the set (4); the first actuator is fixed to the transverse reaction frame, and the output end faces the top of the set (4), so as to apply a vertical force to the substation frame column (10); A steel hemisphere (33) is fixed to the end of the support rod (32), and the spherical surface of the steel hemisphere (33) abuts against the solid surface; The top of the furnace cavity is a furnace cover (83), and the furnace cover (83) is divided into a left cover and a right cover. A gap is formed between the left cover and the right cover for the substation frame column (10) to pass through, and the gap is sealed with fireproof cotton; The fire test furnace (8) comprises a combustion furnace (81) and a raised layer (82); the top of the combustion furnace (81) is open, and the raised layer (82) is built upward along the furnace wall of the combustion furnace (81) using fireproof bricks to a set height; the furnace cover (83) blocks the top of the raised layer (82); a plurality of flame nozzles and flues are opened on the side wall of the combustion furnace (81); and the flame nozzles are connected to the burner.

2. A mechanical properties testing device for substation frame columns under simulated fire according to claim 1, characterized in that: One end of the support rod (32) is provided with an external thread, and a sleeve (34) that matches the thread of the support rod (32) is fixed at a corresponding position of the fixing frame.

3. A mechanical properties testing device for substation frame columns under simulated fire according to claim 1 or 2, characterized in that: The set (4) comprises an inverted U-shaped groove, and the inverted U-shaped groove is buckled on the top of the substation frame column (10).

4. A mechanical properties testing device for substation frame columns under simulated fire according to claim 1 or 2, characterized in that: The fixed base (5) comprises a concrete block and bolts embedded in the concrete block; the column feet of the two substation frame columns are fixed with fixing plates, the fixing plates are provided with screw holes, and the substation frame columns are fixed by the screw holes and the bolts.

5. A method for testing the mechanical properties of a substation frame column, applied to the device described in any one of claims 1 to 4, characterized in that: The following steps are involved: Processing the test structure, according to the test purpose, processing and manufacturing a scaled model of the substation frame column (10), processing the restraining frame (3), the set (4), the fixed base (5), and the fire test furnace (8); The two ends of the transverse reaction frame (2) are fixed to the vertical reaction frame (1), and then the first actuator is fixed to the transverse reaction frame (2), and the fixed base (5) is hoisted into the fire test furnace (8), and the column foot of the substation frame column is fixed to the fixed base (5), and it is ensured that the substation frame column and the center of the first actuator are consistent; the set (4) is set on the top of the substation frame column, and then the restraint frame (3) is hoisted to the specified position for installation and fixation, and finally the movement sensor and the temperature sensor (72) are installed and connected to the upper computer for communication, and then the left sliding door and the right sliding door are closed, and the door gap is tightly sealed with fireproof cotton. The flame nozzle of the fire test furnace (8) is connected to our flame supply device. After the installation and debugging are completed, the ignition can be started to start the test.

6. A method for testing mechanical properties of a substation frame column according to claim 5, characterized in that: Use a plumb bob or string to mark the center of the first actuator and the fixed base (5) downward.

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