A steel structure testing machine for building structure design

Abstract

The present invention relates to the technical field of steel structure impact testing, and in particular to a steel structure testing machine for building structure design. It includes a base, a camera, a support plate, an impact assembly and a placement frame, the camera and the support plate are both installed on the base, the support plate is provided with an impact assembly and a placement frame, and the base is provided with a protective net. The present invention can heat or cool the steel structure in the protective net, so that the steel structure can be directly impact tested after the heating or cooling is completed, so that there is no need to perform a transfer operation, which can not only prevent the steel structure in a high or low temperature state from being greatly affected by the external environment, thereby improving the accuracy of the steel structure impact test, but also prevent the operator from being scalded or frostbitten by the steel structure during the transfer process, thereby improving the safety during the test process, and by providing a first anti-collision rubber plate and a protective mechanism, it can prevent the fracture surface of the steel structure from producing collision marks that affect the operator's subsequent analysis, thereby improving the evaluation of the steel structure performance.

Description

Technical Field

[0001] The invention relates to the technical field of steel structure impact testing, and in particular to a steel structure component testing machine for building structure design. Background Art

[0002] In the field of modern construction, steel structures are widely used due to their advantages such as high strength, light weight and rapid construction. Steel structures can not only meet the aesthetic and functional requirements of buildings, but also improve the safety and durability of buildings to a certain extent. When facing extreme conditions such as natural disasters (such as earthquakes, strong winds) or man-made accidents (such as vehicle collisions), the performance of steel structures is directly related to the overall safety of the building and the safety of life and property of personnel. Therefore, comprehensive performance testing of steel structures, especially impact testing under sudden external forces, has become an indispensable part of ensuring building quality.

[0003] At present, the most commonly used impact test method for steel structures is the drop hammer impact tester. This method can more realistically reflect the behavioral characteristics of steel structures when subjected to instantaneous external forces by simulating actual impact conditions. In order to more comprehensively evaluate the performance of steel structures under different environmental conditions, tests are usually carried out under low temperature, high temperature and normal temperature conditions. When testing temperature sensitivity, the steel structure needs to be heated or cooled to a specified temperature first, and then the steel structure at the specified temperature is transferred to the drop hammer impact tester for testing. However, during the transfer of the steel structure, the temperature of the steel structure is easily affected by the external environment and changes, causing the test conditions to deviate from the predetermined values, affecting the accuracy of the test results. In addition, there are safety hazards in the transfer process of steel structures in high or low temperature states. Operators need to take additional safety measures to prevent burns or frostbite, which increases the complexity and risk of the test work. In addition, when the steel structure breaks in the existing drop hammer impact tester, the fracture surface of the steel structure may collide with the protective net on the impact tester, causing collision marks on the fracture surface. These collision marks may interfere with the operator's observation and analysis of the fracture surface characteristics, thereby affecting the accurate evaluation of the performance of the steel structure. Summary of the invention

[0004] In view of this, the present invention provides a steel structure testing machine for building structure design, which can solve the problems that when using an existing drop hammer impact testing machine to perform steel structure impact testing, it is not only difficult to transfer the steel structure to a specified temperature, but the temperature of the steel structure during the transfer process is easily affected by the external temperature, resulting in deviations in the test results. In addition, after the fracture surface of the steel structure collides with the protective net, the impact marks on the fracture surface will interfere with the operator's observation and analysis of the fracture surface characteristics.

[0005] The technical solution is: a steel structure testing machine for building structure design, including a base, a camera, a support plate, an impact assembly and a placement frame, the camera and the support plate are installed on the base, the camera is used to shoot the impact process of the steel structure, the support plate is provided with an impact assembly and a placement frame, the placement frame is used to place the steel structure, and the impact assembly is used to impact the steel structure on the placement frame, a protective net is provided on the base, the impact assembly and the placement frame are both located on the inner side of the protective net, a revolving door is provided on the protective net, a first anti-collision rubber plate is provided on the inner wall of the protective net, the first anti-collision rubber plate is used to prevent the steel structure from colliding with the protective net, and the support plate A first electric push rod is connected to the support plate, and an electric heater for heating the steel structure is connected to the telescopic rod of the first electric push rod. A protective mechanism is arranged on the electric heater, and the protective mechanism is used to prevent the steel structure from colliding with the electric heater. An electric slide rail is also arranged on the support plate, and a hard pipe is connected to the slider of the electric slide rail, and a nozzle is connected to one end of the hard pipe, and the nozzle is used to spray liquid nitrogen onto the steel structure for cooling. A detection mechanism is arranged between the electric heater and the nozzle, and the detection mechanism is used to detect the temperature of the steel structure. An infusion mechanism is arranged on the support plate, and the infusion mechanism is connected to the other end of the hard pipe, and the infusion mechanism is used to input liquid nitrogen into the hard pipe.

[0006] Furthermore, the protective mechanism includes a spring and a second anti-collision rubber plate, one end of the spring is connected to the electric heater, and the other end of the spring is connected to the second anti-collision rubber plate, and the second anti-collision rubber plate is used to prevent the steel structure from colliding with the electric heater.

[0007] Furthermore, the detection mechanism includes a first temperature detector and a second temperature detector. The first temperature detector is arranged on the electric heater, and the second temperature detector is arranged on the nozzle. Both the first temperature detector and the second temperature detector are used to detect the temperature of the steel structure.

[0008] Furthermore, the infusion mechanism includes a liquid storage tank, a first pump and a hose. The support plate is connected to the liquid storage tank, the liquid storage tank is connected to the first pump, the water inlet of the first pump is connected to the liquid storage tank, the water outlet of the first pump is connected to the other end of the hard pipe through the hose, and the first pump is used to pump liquid nitrogen in the liquid storage tank into the hard pipe.

[0009] Furthermore, it also includes a heat exchange mechanism, which includes a collecting frame, a second electric push rod and a filter frame. A collecting frame for storing clean water is arranged on the base, and the clean water in the collecting frame is used for heat exchange with the steel structure. A second electric push rod is symmetrically arranged on the side of the collecting frame, and a filter frame is slidably arranged in the collecting frame, and the telescopic rod of the second electric push rod is connected to the filter frame. The second electric push rod is used to drive the filter frame to rise and fall, thereby bringing the steel structure out of the clean water through the filter frame.

[0010] Furthermore, it also includes a second pump, a return pipe, fins, a ventilation duct and a fan. The second pump is installed on the side of the collection frame, the water inlet of the second pump is connected to the collection frame, one end of the return pipe is connected to the water outlet of the second pump, and the other end of the return pipe is connected to the collection frame. Fins are arranged at annular intervals on the outside of the return pipe, and ventilation ducts are installed between the outsides of the fins. A fan is installed on the base, and the air outlet of the fan is connected to the ventilation duct. The fan is used to blow air to the fins in the ventilation duct, so as to exchange heat with the clean water in the return pipe through the fins.

[0011] The beneficial effects of the present invention are as follows: 1. The present invention can heat or cool the steel structure in the protective net, so that the steel structure can be directly impact tested after the heating or cooling is completed, thereby eliminating the need for transfer operations. This can not only prevent the steel structure in a high or low temperature state from being greatly affected by the external environment, thereby improving the accuracy of the impact test of the steel structure, but also prevent the operator from being scalded or frostbitten by the steel structure during the transfer process, thereby improving the safety during the test. In addition, by providing a first anti-collision rubber plate and a protective mechanism, it can prevent the fracture surface of the steel structure from producing collision marks that affect the operator's subsequent analysis, thereby improving the accuracy of the assessment of the steel structure's performance.

[0012] 2. The present invention provides a heat exchange mechanism, which can utilize clean water to exchange heat for the tested steel structure, so that the tested steel structure can be restored from a high temperature or low temperature state to a normal temperature state, so as to facilitate the operator to take out the tested steel structure, thereby avoiding burns or frostbite caused by the tested steel structure to the operator. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0014] Figure 2 It is a schematic diagram of the three-dimensional structure of the camera, support plate and impact assembly of the present invention.

[0015] Figure 3 It is a schematic diagram of the three-dimensional structure of the protective net, the revolving door and the first anti-collision rubber plate of the present invention.

[0016] Figure 4 This is a structural separation diagram of the protective net, the revolving door and the first anti-collision rubber plate of the present invention.

[0017] Figure 5 It is a schematic diagram of the three-dimensional structure of the first electric push rod, the electric heater and the second anti-collision rubber plate of the present invention.

[0018] Figure 6 It is a three-dimensional structural schematic diagram of the protection mechanism of the present invention.

[0019] Figure 7 It is a three-dimensional structural schematic diagram of the electric slide rail, hard pipe and nozzle of the present invention.

[0020] Figure 8 It is a schematic diagram of the three-dimensional structure of the infusion mechanism of the present invention.

[0021] Fig. 9 It is a schematic diagram of the three-dimensional structure of the heat exchange mechanism of the present invention.

[0022] Fig.10 This is a structural separation diagram of the heat exchange mechanism of the present invention.

[0023] Fig.11 It is a schematic diagram of the three-dimensional structure of the return pipe, ventilation duct and fan of the present invention.

[0024] Fig.12 It is a cross-sectional view of the return pipe and the ventilator of the present invention.

[0025] Figure numbers: 1-base, 101-steel structure, 2-camera, 3-support plate, 4-impact assembly, 401-servo motor, 402-pendulum, 403-dial, 5-placing rack, 6-protective net, 7-revolving door, 8-first anti-collision rubber plate, 9-first electric push rod, 10-electric heater, 1101-spring, 1102-second anti-collision rubber plate, 12-electric slide rail, 13-hard pipe, 14-sprinkler, 1501-first temperature detector, 1502-second temperature detector, 1601-liquid storage tank, 1602-first pump, 1603-hose, 23-collection frame, 24-second electric push rod, 25-filter frame, 26-second pump, 27-reflux pipe, 2701-fin, 28-ventilator, 29-fan. DETAILED DESCRIPTION

[0026] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0027] Embodiment: A steel structure testing machine for building structure design, see Figure 1-Figure 8As shown, it includes a base 1, a camera 2, a support plate 3, an impact assembly 4 and a placement frame 5; the camera 2 is installed on the upper left side of the base 1, and the camera 2 is used to shoot the impact process of the steel structure 101, so that the operator can watch the impact process of the steel structure 101; the support plate 3 is connected to the middle part of the lower side of the base 1; the impact assembly 4 is arranged on the top of the support plate 3, and the impact assembly 4 includes a servo motor 401, a pendulum 402 and a dial 403; the servo motor 401 is arranged on the top of the support plate 3, and the servo motor The output shaft of 401 does not have a locking function, that is, when the servo motor 401 is not working, its output shaft can rotate freely (existing technology, no further description is given), and a pendulum 402 is connected to the output shaft of the servo motor 401, and the pendulum 402 is used to impact the steel structure 101, thereby performing an impact test on the steel structure 101, and a dial 403 is provided on the outside of the servo motor 401; a placement rack 5 is provided on the lower front side of the support plate 3, and the placement rack 5 is U-shaped, and the placement rack 5 is used to place the steel structure 101.

[0028] It also includes a protective net 6, a revolving door 7, a first anti-collision rubber plate 8, a first electric push rod 9, an electric heater 10, an electric slide rail 12, a hard pipe 13, a nozzle 14, a protective mechanism, a detection mechanism and an infusion mechanism; a protective net 6 is arranged on the top of the base 1, the impact assembly 4 and the placement rack 5 are both located on the inner side of the protective net 6, and an adapter hole is opened on the lower left side of the bottom of the protective net 6 that does not block the camera 2 from shooting; a revolving door 7 is arranged on the right side of the lower front side of the protective net 6, and a layer of rubber plate is arranged on the rear side of the revolving door 7. It is used to prevent the steel structure 101 from colliding with the revolving door 7, and a limiting mechanism for limiting the revolving door 7 is provided on the lower middle part of the front side of the protective net 6 (existing technology, no more description is given); the inner wall of the protective net 6 is provided with a first anti-collision rubber plate 8, the first anti-collision rubber plate 8 is used to prevent the steel structure 101 from colliding with the protective net 6, and the first anti-collision rubber plate 8 is a transparent rubber plate so that the first anti-collision rubber plate 8 does not affect the camera 2 from shooting; the middle part of the support plate 3 is connected to a first electric push rod 9; the telescopic rod of the first electric push rod 9 An electric heater 10 for heating the steel structure 101 is connected to the support plate 3; a protective mechanism is provided on the electric heater 10, which is used to prevent the steel structure 101 from colliding with the electric heater 10, thereby protecting the electric heater 10 and preventing the electric heater 10 from colliding with the fracture surface of the steel structure 101; an electric slide rail 12 is provided in the middle of the left side of the support plate 3; a hard pipe 13 is connected to the slider of the electric slide rail 12, and the hard pipe 13 movably penetrates the support plate 3; a nozzle 14 is connected to the front end of the hard pipe 13 The nozzle 14 is used to spray liquid nitrogen onto the steel structure 101 for cooling. A rubber block is provided on the front side of the nozzle 14 to prevent the steel structure 101 from colliding with the nozzle 14. A detection mechanism is provided between the electric heater 10 and the nozzle 14 to detect the temperature of the steel structure 101, so as to facilitate the operator to heat or cool the steel structure 101 to a specified temperature. An infusion mechanism is provided on the support plate 3, and the infusion mechanism is connected to the other end of the hard tube 13, and the infusion mechanism is used to input liquid nitrogen into the hard tube 13.

[0029] See also Figure 5 and Figure 6 As shown, the protective mechanism includes a spring 1101 and a second anti-collision rubber plate 1102; the rear ends of the four springs 1101 are connected to the front side of the electric heater 10, and the second anti-collision rubber plate 1102 is connected between the front ends of the four springs 1101, and the second anti-collision rubber plate 1102 is used to prevent the steel structure 101 from colliding with the electric heater 10.

[0030] See also Figure 6-Figure 8 As shown, the detection mechanism includes a first temperature detector 1501 and a second temperature detector 1502; the first temperature detector 1501 is arranged on the electric heater 10; the second temperature detector 1502 is arranged on the nozzle 14, and the first temperature detector 1501 and the second temperature detector 1502 are both used to detect the temperature of the steel structure 101.

[0031] See also Figure 7 and Figure 8 As shown, the infusion mechanism includes a liquid storage tank 1601, a first pump 1602 and a hose 1603; the lower rear portion of the support plate 3 is connected to the liquid storage tank 1601; the top of the liquid storage tank 1601 is connected to the first pump 1602, and the water inlet of the first pump 1602 is connected to the liquid storage tank 1601; the water outlet of the first pump 1602 is connected to the other end of the hard tube 13 through the hose 1603, and the first pump 1602 is used to pump the liquid nitrogen in the liquid storage tank 1601 into the hard tube 13.

[0032] When in use, first place the plastic frame just below the protective net 6, then add liquid nitrogen into the liquid storage tank 1601, then start the servo motor 401, and at the same time control the output shaft of the servo motor 401 to drive the pendulum 402 to rotate, and the operator cooperates with the dial 403 to rotate the pendulum 402 to a specified height, then open the revolving door 7, and then place the steel structure 101 to be tested on the placement rack 5 (such as Figure 2As shown), the revolving door 7 is then closed, and the next step is performed as required: if the steel structure 101 needs to be tested at room temperature, no additional operation is required; if the steel structure 101 needs to be tested at high temperature, the electric heater 10 is driven forward by the first electric push rod 9 to move the electric heater 10 to the middle of the steel structure 101, and then the electric heater 10 is started to heat the steel structure 101, and the first temperature detector 1501 is started to detect the temperature of the steel structure 101. After the operator learns from the first temperature detector 1501 that the temperature of the steel structure 101 has been heated to a suitable temperature, the electric heater 10 and the first temperature detector 1501 are turned off, and then the electric heater 10 is driven backward by the first electric push rod 9 to reset. If the steel structure 101 needs to be placed in a low temperature state for testing, the electric slide rail 12 drives the hard pipe 13 and the nozzle 14 to move forward, so that the nozzle 14 moves to the upper middle part of the steel structure 101, and then the first pump 1602 is started to pump the liquid nitrogen in the liquid storage tank 1601 into the nozzle 14 through the hose 1603 and the hard pipe 13, so that the nozzle 14 sprays the liquid nitrogen onto the steel structure 101, thereby cooling the steel structure 101, and the second temperature detector 1502 is started to detect the temperature of the steel structure 101. After the operator learns from the second temperature detector 1502 that the steel structure 101 has cooled to a suitable temperature, the first pump 1602 and the second temperature detector 1502 are turned off, and then the electric slide rail 12 drives the hard pipe 13 and the nozzle 14 to move backward and reset;After the above operations are completed, the servo motor 401 is turned off to relax the output shaft of the servo motor 401, so that the pendulum 402 reverses and falls under the action of its own gravity. When the pendulum 402 contacts the steel structure 101 on the placement rack 5, the pendulum 402 will hit the steel structure 101, thereby performing an impact test on the steel structure 101. During this period, the impact test process of the steel structure 101 can be photographed by the camera 2, so that the subsequent operation can observe the impact test of the steel structure 101 through the captured video. It can be seen that when the steel structure 101 is broken by the impact of the pendulum 402, the broken steel structure 101 will fly in the protective net 6. At this time, the protective net 6 can block the scattered steel structure 101 to prevent the scattered steel structure 101 from causing harm to nearby operators. By arranging the first anti-collision rubber plate 8 and the second anti-collision rubber plate 1102 in the protective net 6, it is possible to prevent the fracture surface of the steel structure 101 from colliding with the protective net 6 and the electric heater 10, thereby avoiding the protective net 6 and the electric heater 10 from being in the steel structure 1 01 causes a collision mark on the fracture surface, and the second anti-collision rubber plate 1102 can be used to protect the electric heater 10 to prevent the electric heater 10 from being damaged by the steel structure 101 due to collision. When the steel structure 101 collides with the second anti-collision rubber plate 1102, the steel structure 101 will squeeze the second anti-collision rubber plate 1102 to deform and push the second anti-collision rubber plate 1102 to move backward, and the spring 1101 is compressed. The elastic force of the spring 1101 can buffer the impact force of the steel structure 101. After the impact force is gradually offset, the steel structure 101 will fall down into the plastic frame due to its own gravity for unloading. After that, the operator will take out the tested steel structure 101 from the plastic frame and analyze it by observing the fracture surface of the steel structure 101 to evaluate the performance of the steel structure 101. When the steel structure 101 is separated from the second anti-collision rubber plate 1102, the spring 1101 returns to its original state, and the spring 1101 drives the second anti-collision rubber plate 1102 to move forward and reset, and at the same time, the second anti-collision rubber plate 1102 returns to its original state. ;

[0033] See also Fig. 9 and Fig.10 As shown, a heat exchange mechanism is also included, which includes a collecting frame 23, a second electric push rod 24 and a filter frame 25; a collecting frame 23 for storing clean water is arranged on the lower side of the base 1, and the clean water in the collecting frame 23 is used for heat exchange with the steel structure 101; four second electric push rods 24 are symmetrically arranged on the side of the collecting frame 23; a filter frame 25 is slidably arranged in the collecting frame 23, and the telescopic rods of the four second electric push rods 24 are all connected to the filter frame 25, and the second electric push rod 24 is used to drive the filter frame 25 to rise and fall, so as to bring the steel structure 101 out of the clean water through the filter frame 25.

[0034] When in use, there is no need to place the plastic frame directly under the protective net 6. Just pour a proper amount of clean water into the collection frame 23. When the steel structure 101 falls down under its own gravity to discharge, the steel structure 101 will fall into the clean water in the collection frame 23. At this time, if the steel structure 101 is in a high temperature state, the clean water will absorb the heat of the steel structure 101, thereby cooling the steel structure 101. If the steel structure 101 is in a low temperature state, the steel structure 101 will absorb the heat of the clean water, thereby heating the steel structure 101. Temperature, so that the steel structure 101 in a high-temperature or low-temperature state gradually returns to normal temperature, and then the second electric push rod 24 is controlled to drive the filter frame 25 to move upward, so that the filter frame 25 brings the steel structure 101 in a normal temperature state out of the clean water, and then the operator takes out the steel structure 101 in a normal temperature state. In this way, it is convenient for the operator to take out the tested steel structure 101, thereby avoiding burns or frostbite caused by the tested steel structure 101 to the operator, and then the second electric push rod 24 is controlled to drive the filter frame 25 to move downward and reset.

[0035] See also Fig.11 and Fig.12 As shown, it also includes a second pump 26, a return pipe 27, fins 2701, a ventilation duct 28 and a fan 29; a second pump 26 is installed on the left rear side of the collecting frame 23, and the water inlet of the second pump 26 is connected to the collecting frame 23; one end of the return pipe 27 is connected to the water outlet of the second pump 26, and the other end of the return pipe 27 is connected to the collecting frame 23; fins 2701 are connected to the outside of the return pipe 27 in an annular manner, one end of the fins 2701 is located on the inner side of the return pipe 27, and the other end of the fins 2701 is located on the outer side of the return pipe 27; a ventilation duct 28 is arranged between the outer sides of the fins 2701, a fan 29 is installed on the left rear side of the base 1, and the air outlet of the fan 29 is connected to the ventilation duct 28, and the fan 29 is used to blow air to the fins 2701 in the ventilation duct 28, so as to exchange heat with the clean water in the return pipe 27 through the fins 2701.

[0036] When the steel structure 101 falls into the clean water in the collection frame 23 for heat exchange, the clean water in the collection frame 23 can be pumped out into the return pipe 27 by the second pump 26, so that the clean water in the return pipe 27 comes into contact with the fins 2701, and at the same time, the wind is blown into the ventilation duct 28 by the fan 29 to blow the fins 2701 in the ventilation duct 28, so that the wind in the ventilation duct 28 exchanges heat with the clean water in the return pipe 27 through the fins 2701. If the temperature of the clean water is lower than the outside temperature, the fins 2701 will be moved. 01 will release heat to the clean water in the return pipe 27, so that the clean water in the return pipe 27 will gradually heat up. If the temperature of the clean water is higher than the outside temperature, the fins 2701 will absorb heat from the clean water in the return pipe 27, so that the clean water in the return pipe 27 will gradually cool down. The clean water after heat exchange will then flow back to the collecting frame 23 through the return pipe 27. In this way, the clean water in the collecting frame 23 can be heat exchanged, thereby preventing the clean water in the collecting frame 23 from being in a high or low temperature state for a long time, which will affect the heat exchange effect of the clean water on the steel structure 101.

[0037] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A steel structure testing machine for building structure design, comprising a base (1), a camera (2), a support plate (3), an impact assembly (4) and a placement frame (5), wherein the camera (2) and the support plate (3) are both mounted on the base (1), the camera (2) is used to photograph the impact process of the steel structure (101), the support plate (3) is provided with an impact assembly (4) and a placement frame (5), the placement frame (5) is used to place the steel structure (101), and the impact assembly (4) is used to impact the steel structure (101) on the placement frame (5), characterized in that: A protective net (6) is arranged on the base (1), the impact assembly (4) and the placement frame (5) are both located on the inner side of the protective net (6), a revolving door (7) is arranged on the protective net (6), a first anti-collision rubber plate (8) is arranged on the inner wall of the protective net (6), the first anti-collision rubber plate (8) is used to prevent the steel structure (101) from colliding with the protective net (6), a first electric push rod (9) is connected to the support plate (3), an electric heater (10) for heating the steel structure (101) is connected to the telescopic rod of the first electric push rod (9), and a protective mechanism is arranged on the electric heater (10), the protective mechanism is used to prevent the steel structure (101) from colliding with the protective net (6) The support plate (3) is provided with an electric slide rail (12), a slider of the electric slide rail (12) is connected to a hard tube (13), one end of the hard tube (13) is connected to a nozzle (14), the nozzle (14) is used to spray liquid nitrogen to the steel structure (101) for cooling, a detection mechanism is provided between the electric heater (10) and the nozzle (14), the detection mechanism is used to detect the temperature of the steel structure (101), an infusion mechanism is provided on the support plate (3), and the infusion mechanism is connected to the other end of the hard tube (13), the infusion mechanism is used to inject liquid nitrogen into the hard tube (13); the protection mechanism includes a spring (11 01 and a second anti-collision rubber plate (1102), one end of the spring (1101) is connected to the electric heater (10), the other end of the spring (1101) is connected to the second anti-collision rubber plate (1102), the second anti-collision rubber plate (1102) is used to prevent the steel structure (101) from colliding with the electric heater (10); the detection mechanism includes a first temperature detector (1501) and a second temperature detector (1502), the electric heater (10) is provided with the first temperature detector (1501), the nozzle (14) is provided with the second temperature detector (1502), the first temperature detector (1501) and the second The temperature detector (1502) is used to detect the temperature of the steel structure (101); the infusion mechanism comprises a liquid storage tank (1601), a first pump (1602) and a hose (1603); the support plate (3) is connected to the liquid storage tank (1601); the liquid storage tank (1601) is connected to the first pump (1602); the water inlet of the first pump (1602) is connected to the liquid storage tank (1601); the water outlet of the first pump (1602) is connected to the other end of the hard tube (13) through the hose (1603); the first pump (1602) is used to pump liquid nitrogen in the liquid storage tank (1601) into the hard tube (13);The heat exchange mechanism also includes a collection frame (23), a second electric push rod (24) and a filter frame (25). The base (1) is provided with a collection frame (23) for storing clean water. The clean water in the collection frame (23) is used to exchange heat with the steel structure (101). The second electric push rod (24) is symmetrically provided on the side of the collection frame (23). The filter frame (25) is slidably provided in the collection frame (23). The telescopic rod of the second electric push rod (24) is connected to the filter frame (25). The second electric push rod (24) is used to drive the filter frame (25) to rise and fall, thereby taking the steel structure (101) out of the clean water through the filter frame (25).

2. A steel structure testing machine for building structure design according to claim 1, characterized in that: The invention also comprises a second pump (26), a return pipe (27), fins (2701), a ventilation tube (28) and a fan (29). The second pump (26) is installed on the side of the collection frame (23). The water inlet of the second pump (26) is connected to the collection frame (23). One end of the return pipe (27) is connected to the water outlet of the second pump (26). The other end of the return pipe (27) is connected to the collection frame (23). Fins (2701) are arranged at intervals in an annular pattern on the outside of the return pipe (27). The ventilation tube (28) is installed between the outsides of the fins (2701). The fan (29) is installed on the base (1). The air outlet of the fan (29) is connected to the ventilation tube (28). The fan (29) is used to blow air to the fins (2701) in the ventilation tube (28), so as to exchange heat with the clean water in the return pipe (27) through the fins (2701).

Images