A high and low temperature internal pressure bending test device

Abstract

A high and low temperature internal pressure bending test device, comprising a high and low temperature test chamber, a bending reciprocating tooling, a bending power component, a horizontal moving tooling and a pressure system; a test chamber, a high and low temperature air duct and a high temperature air duct are arranged in the high and low temperature test chamber; a first specimen mounting block capable of horizontal movement is arranged on the horizontal moving tooling, a second specimen mounting block capable of vertical movement is arranged on the bending reciprocating tooling, and the first specimen mounting block is horizontally moved to adjust the relative distance from the second specimen mounting block; a pressure pipeline of the pressure system is connected to the test pipe to provide a preset alternating internal pressure required for the test to the test pipe; the bending power component is used to drive the second specimen mounting block to perform vertical reciprocating motion in the test chamber, so as to drive the test pipe to perform a bending test under the conditions of a preset ambient temperature and a preset internal pressure. The present invention can perform bending tests under two different temperature ranges of high and low temperature (-70 to 180 °C) and high temperature (180 to 230 °C), ensuring the continuity of the test.

Description

Technical Field

[0001] The present invention relates to the field of pipe bending test devices, and particularly to a high and low temperature internal pressure bending test device. Background Art

[0002] With the development of aerospace technology and construction machinery technology, the required working time and temperature tolerance of the matching transmission oil pipes are also constantly increasing. The most representative one is the polytetrafluoroethylene pipe, which has been widely used in the above industries. Before the application of the polytetrafluoroethylene pipe, generally, bending performance tests need to be carried out by simulating the alternating high and low temperature environment and internal pressure alternating according to the actual working condition standards.

[0003] At present, the high and low temperature environment alternating system in the industry is restricted by the refrigerant of the refrigeration system and thus cannot meet the actual high and low temperature alternating standard requirements (-70~230°C), and the traditional motor cam bending method also cannot meet the convenience requirements of stepless adjustment of the bending stroke. Therefore, the application of the current high and low temperature environment alternating system is greatly restricted. Summary of the Invention

[0004] In order to solve the above problems existing in the prior art, the present invention provides a high and low temperature internal pressure bending test device that can perform bending tests at two different temperature ranges of high and low temperature (-70~180°C) and high temperature (180~230°C), and ensures the continuity of the test.

[0005] To achieve the above object, the present invention provides a high and low temperature internal pressure bending test device, including a high and low temperature test chamber, a bending reciprocating tooling, a bending power assembly, a horizontal moving tooling, and a pressure system;

[0006] A test chamber, a high and low temperature air duct and a high temperature air duct leading to the test chamber are provided in the high and low temperature test chamber. The high and low temperature air duct and the high temperature air duct are respectively used to provide airflows at preset temperatures to the test chamber to meet the preset ambient temperature required for the test; the horizontal moving tooling and the bending reciprocating tooling are arranged horizontally in the test chamber. A first specimen mounting block for connecting one end of the test pipe and capable of horizontal movement is provided on the horizontal moving tooling, and a second specimen mounting block for connecting the other end of the test pipe and capable of vertical movement is provided on the bending reciprocating tooling. The first specimen mounting block is horizontally moved to adjust the relative distance from the second specimen mounting block; the pressure system is arranged outside the test chamber, and the pressure pipeline of the pressure system extends into the test chamber and is connected to the test pipe to provide the preset alternating internal pressure required for the test to the test pipe; the bending power assembly is arranged outside the test chamber, the power component of the bending power assembly is an oil cylinder, and the output shaft of the oil cylinder is connected to the second specimen mounting block to drive the second specimen mounting block to perform up and down reciprocating movement in the test chamber, so as to drive the test pipe to perform a bending test under the conditions of preset ambient temperature and preset internal pressure.

[0007] As a further preferred technical solution of the present invention, the bending reciprocating tooling further includes two chutes vertically arranged on both sides of the second specimen mounting block, and guiding sliders fixedly connected to the second specimen mounting block are arranged on the chutes. The second specimen mounting block slides up and down along the chutes with the guiding sliders under the drive of the bending power assembly.

[0008] As a further preferred technical solution of the present invention, the bending power assembly further includes a hydraulic pump station and a displacement sensor. The hydraulic pump station is connected to the oil cylinder to provide the power required by the oil cylinder. The output shaft of the oil cylinder is vertically connected to the second specimen mounting block, and the displacement sensor is used to detect the position of the output shaft of the oil cylinder in real time.

[0009] As a further preferred technical solution of the present invention, a transfer member vertically connected and docked with the output shaft of the oil cylinder is arranged on the second specimen mounting block. A through hole for the transfer member to pass through is correspondingly arranged on the test chamber. A heat insulation member is sleeved on the transfer member at the through hole, and the heat insulation member is used for sealing and heat insulation of the through hole area.

[0010] As a further preferred technical solution of the present invention, the horizontal moving tooling includes a mounting frame, guiding rods horizontally arranged on the mounting frame, and a sliding assembly arranged on the guiding rods. The first specimen mounting block is fixed on the sliding assembly. The sliding assembly slides on the guiding rods to enable the first specimen mounting block to horizontally move towards or away from the second specimen mounting block, so as to adjust the relative distance between the first specimen mounting block and the second specimen mounting block on the same horizontal plane.

[0011] As a further preferred technical solution of the present invention, two pipe joints connected to the pressure pipeline are arranged at one end of the mounting frame far away from the second specimen mounting block. Two bendable transfer pipelines are further arranged between the mounting frame and the first specimen mounting block. Each of the two pipe joints is connected to a specimen pipe installed on the first specimen mounting block through a transfer pipeline, and the two specimen pipes are connected and conducted on the second specimen mounting block, so that the pressure pipeline forms a circulating path;

[0012] The transfer pipeline includes a first section pipe and a second section pipe. One end of the first section pipe is rotatably connected to the mounting frame and communicated with the pipe joint. The other end of the first section pipe is rotatably connected to and communicated with the second section pipe. The other end of the second section pipe is rotatably connected to the first specimen mounting block and communicated with the test pipe.

[0013] As a further preferred technical solution of the present invention, the pressure system includes a medium box, a circulation pump, a pressure sensor, an adjusting mechanism and an air-controlled valve arranged on the pressure pipeline. The sample pipe is connected to the pressure pipeline to form a circulation passage. The medium box is connected to the pressure pipeline to provide a circulating medium. The circulation pump, the adjusting mechanism and the pressure sensor are arranged in sequence on the pressure pipeline between the medium box and the input side of the sample pipe along the medium flow direction. The air-controlled valve is arranged on the pressure pipeline between the output side of the sample pipe and the medium box.

[0014] As a further preferred technical solution of the present invention, the adjusting mechanism includes a sealed cylinder head, a screw pair, a reducer and a servo spindle motor. The cylinder body of the sealed cylinder head is conductively connected in the pressure pipe, the piston rod of the sealed cylinder head is connected to the screw pair, the reducer is transmission connected to the screw pair, and the servo spindle motor is transmission connected to the reducer.

[0015] As a further preferred technical solution of the present invention, the air outlet duct and the return air duct of the high and low temperature air duct are both provided with a partition controlled by a cylinder, and the cylinder drives the partition to move to control the opening and closing of the air outlet duct or the return air duct.

[0016] As a further preferred technical solution of the present invention, the preset temperature range of the airflow provided by the high and low temperature air ducts is -70 to 180°C, and the preset temperature range of the airflow provided by the high temperature air duct is 180 to 230°C.

[0017] The high and low temperature internal pressure bending test device of the present invention includes a high and low temperature test chamber, a bending reciprocating tooling, a bending power component, a horizontal moving tooling, and a pressure system; a test chamber, a high and low temperature air duct and a high temperature air duct leading to the test chamber are provided in the high and low temperature test chamber. The high and low temperature air duct and the high temperature air duct are respectively used to supply airflows at preset temperatures to the test chamber to meet the preset ambient temperature required for the test; the horizontal moving tooling and the bending reciprocating tooling are arranged horizontally in the test chamber. A first specimen mounting block for connecting to one end of the test pipe and capable of horizontal movement is provided on the horizontal moving tooling, and a second specimen mounting block for connecting to the other end of the test pipe and capable of vertical movement is provided on the bending reciprocating tooling. The first specimen mounting block is horizontally moved to adjust the relative distance from the second specimen mounting block; the pressure system is arranged outside the test chamber, and the pressure pipeline of the pressure system extends into the test chamber and is connected to the test pipe to provide the preset alternating internal pressure required for the test to the test pipe; the bending power component is arranged outside the test chamber, and the power component of the bending power component is an oil cylinder. The output shaft of the oil cylinder is connected to the second specimen mounting block to drive the second specimen mounting block to perform reciprocating up and down movement in the test chamber, thereby driving the test pipe to perform a bending test under the conditions of preset ambient temperature and preset internal pressure, so that the present invention meets the tests of any temperature, pressure, and bending stroke within the standard specified range and can be adjusted steplessly; and bending tests can be carried out at two different temperature ranges of high and low temperature and high temperature, ensuring the continuity of the test; in addition, the present invention has a compact structure, convenient operation, and realizes the maximum utilization of functions. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described in detail below with reference to the drawings and specific embodiments.

[0019] Figure 1 FIG. is a schematic structural diagram of an example provided for the high and low temperature internal pressure bending test device of the present invention;

[0020] Figure 2 FIG. is a schematic structural diagram of the bending reciprocating tooling of the present invention;

[0021] Figure 3 FIG. is a schematic structural diagram of the horizontal moving tooling of the present invention;

[0022] Figure 4 FIG. is a schematic diagram of the movement of the test pipe of the present invention during the bending test.

[0023] In the figure: 1. Medium box; 2. Circulation pump; 3. Pressure sensor; 4. Sealed cylinder head; 5. Lead screw pair; 6. Reducer; 7. Servo main shaft motor; 8. Pneumatic control valve; 9. Pressure pipeline; 10. Second specimen mounting block; 11. Guide slider; 12. Chute; 13. Hydraulic pump station; 14. Displacement sensor; 15. Bending oil cylinder; 16. Adapter; 17. Heat insulation part; 18. Installation frame; 19. Guide rod; 20. Sliding assembly; 21. First specimen mounting block; 22. Pipe joint; 23. Adapter pipe; 24. First section of pipe; 25. Second section of pipe;

[0024] 100. Pressure system; 200. High and low temperature test chamber; 300. Horizontal moving tooling; 400. Bending reciprocating tooling; 500. Bending power assembly; 600. Test pipe;

[0025] The realization of the object, functional features and advantages of the present invention will be further described with reference to the embodiments and the accompanying drawings. Detailed implementation manners

[0026] The following will further describe the present invention in combination with the accompanying drawings and specific implementation manners. Terms such as "upper", "lower", "left", "right", "middle" and "one" cited in the preferred embodiments are only for the convenience of narration and are not used to limit the scope of implementation of the present invention. The change or adjustment of their relative relationship, without substantial change in the technical content, should also be regarded as the scope of implementation of the present invention.

[0027] As Figures 1 to 3 shown, the high and low temperature internal pressure bending test device includes a high and low temperature test chamber 200, a bending reciprocating tooling 400, a bending power assembly 500, a horizontal moving tooling 300 and a pressure system 100, wherein:

[0028] The high and low temperature test chamber 200 is provided with a test chamber, a high and low temperature air duct and a high temperature air duct leading to the test chamber. The high and low temperature air ducts are respectively used to provide air flows with preset temperatures to the test chamber to meet the preset ambient temperature required for the test. The preset temperature range of the air flow provided by the high and low temperature air ducts is -70 to 180 °C, and the preset temperature range of the air flow provided by the high temperature air duct is 180 to 230 °C. High and low temperature tests or high temperature tests can be carried out in the test chamber according to requirements. The same specimen can be continuously tested at two different temperatures of high and low temperature (-70 to 180 °C) and high temperature (180 to 230 °C), which not only ensures the continuity of the test, but also meets the alternation of extreme high temperature and extreme low temperature, is convenient to use and saves costs.

[0029] The horizontal moving tooling 300 and the bending reciprocating tooling 400 are arranged horizontally in the test chamber. A first specimen mounting block 21 for connecting to one end of the test pipe 600 and capable of horizontal movement is provided on the horizontal moving tooling 300. A second specimen mounting block 10 for connecting to the other end of the test pipe 600 and capable of vertical movement is provided on the bending reciprocating tooling 400. The first specimen mounting block 21 is horizontally moved to adjust the relative distance from the second specimen mounting block 10. By adjusting the relative distance, test pipes 600 with different length dimensions can be installed and fixed.

[0030] The pressure system 100 is arranged outside the test chamber. The pressure pipeline 9 of the pressure system 100 extends into the test chamber and is connected to the test pipe 600 to provide the preset alternating internal pressure required for the test to the test pipe 600.

[0031] The bending power assembly 500 is arranged outside the test chamber. The power component of the bending power assembly 500 is an oil cylinder. The output shaft of the oil cylinder is connected to the second specimen mounting block 10 to drive the second specimen mounting block 10 to perform reciprocating vertical movement in the test chamber, thereby driving the test pipe 600 to perform a bending test under the conditions of a preset ambient temperature and a preset internal pressure.

[0032] Specifically, the bending reciprocating tooling 400 further includes two vertical chutes 12 arranged on both sides of the second specimen mounting block 10. Guide sliders 11 fixedly connected to the second specimen mounting block 10 are arranged on the chutes 12. The second specimen mounting block 10 slides up and down along the chutes 12 with the guide sliders 11 under the drive of the bending power assembly 500. The bending power assembly 500 further includes a hydraulic pump station 13 and a displacement sensor 14. The hydraulic pump station 13 is connected to the oil cylinder to provide the power required by the oil cylinder. The output shaft of the oil cylinder is vertically connected to the second specimen mounting block 10. The displacement sensor 14 is used to detect the position of the output shaft of the oil cylinder in real time. In this embodiment, the bending reciprocating tooling 400 is arranged at the bottom of the high and low temperature test chamber 200. The output shaft of the oil cylinder is vertically connected to the second specimen mounting block 10. The stroke of the second specimen mounting block 10 performing reciprocating vertical movement is monitored by the displacement sensor 14, and the bending stroke can be adjusted steplessly.

[0033] Preferably, a transfer member 16 vertically connected to the output shaft of the oil cylinder is provided on the second specimen mounting block 10. A through hole for the transfer member 16 to pass through is correspondingly provided on the test chamber. A heat insulation member 17 is sleeved on the transfer member 16 at the through hole. The heat insulation member 17 is used for sealing and heat insulation of the through hole area. The heat insulation member 17 can block the high temperature in the test chamber from being transmitted to the bending oil cylinder 15 to prevent damage to the oil cylinder seal.

[0034] In a specific embodiment, the horizontal movement tooling 300 includes a mounting frame 18, a guide rod 19 horizontally arranged on the mounting frame 18, and a sliding assembly 20 arranged on the guide rod 19. The first specimen mounting block 21 is fixed on the sliding assembly 20. The sliding of the sliding assembly 20 on the guide rod 19 enables the first specimen mounting block 21 to move horizontally towards or away from the second specimen mounting block 10, thereby adjusting the relative distance between the first specimen mounting block 21 and the second specimen mounting block 10 on the same horizontal plane.

[0035] In another specific embodiment, two pipe joints 22 connected to the pressure pipeline 9 are provided at one end of the mounting frame 18 away from the second specimen mounting block 10. Two bendable transfer pipelines 23 are further provided between the mounting frame 18 and the first specimen mounting block 21. Each of the two pipe joints 22 is connected to a specimen pipe installed on the first specimen mounting block 21 through a transfer pipeline 23, and the two specimen pipes are connected and conducted on the second specimen mounting block 10, so that the pressure pipeline 9 forms a circulating path.

[0036] The transfer pipeline 23 includes a first section pipe 24 and a second section pipe 25. One end of the first section pipe 24 is rotatably connected to the mounting frame 18 and communicated with the pipe joint 22. The other end of the first section pipe 24 is rotatably connected to and communicated with the second section pipe 25. The other end of the second section pipe 25 is rotatably connected to the first specimen mounting block 21 and communicated with the test pipe 600. Specifically, both ends of the first section pipe 24 and both ends of the second section pipe 25 are connected through quick connectors to realize the connection of the first section pipe 24 with the second section pipe 25 and the mounting frame 18 respectively, and the connection of the second section pipe 25 with the first section pipe 24 and the first specimen mounting block 21 respectively.

[0037] In a specific embodiment, the pressure system 100 includes a medium tank, a circulation pump 2, a pressure sensor, an adjusting mechanism and a pneumatic control valve 8 arranged on the pressure pipeline 9. The specimen pipe 600 is connected to the pressure pipeline 9 to form a circulating path. The medium tank 1 is connected to the pressure pipeline 9 to provide a circulating medium. The circulation pump 2, the adjusting mechanism and the pressure sensor 3 are sequentially arranged on the pressure pipeline 9 between the medium tank 1 and the input side of the specimen pipe 600 along the medium flow direction. The pneumatic control valve 8 is arranged on the pressure pipeline 9 between the output side of the specimen pipe 600 and the medium tank 1.

[0038] During the exhaust stage of the test, the pneumatic control valve 8 is opened, and the medium in the medium tank 1 circulates along the pressure pipeline 9 under the action of the circulation pump 2. The medium is sequentially pumped to the adjusting mechanism and the test pipe 600, and then flows back to the medium tank through the pneumatic control valve 8.

[0039] During the pressure regulating stage of the test, the pneumatic control valve 8 is closed, and a closed cavity is formed in the pipeline between the outlet of the circulation pump 2 and the pneumatic control valve 8. The position of the piston rod in the sealing cylinder head is indirectly adjusted by adjusting the motor speed to achieve pressure regulation.

[0040] Preferably, the adjusting mechanism includes a sealing cylinder head 4, a lead screw pair 5, a speed reducer 6 and a servo main shaft motor 7. The cylinder body of the sealing cylinder head 4 is conductively connected to the pressure pipeline 9. The piston rod of the sealing cylinder head 4 is connected to the lead screw pair 5. The speed reducer 6 is drivingly connected to the lead screw pair 5. The servo main shaft motor 7 is drivingly connected to the speed reducer 6. The lead screw pair 5 drives the piston rod to move in the cylinder body, thereby adjusting the pressure of the medium in the pressure pipeline 9. Through the drive and adjustment of the servo main shaft motor 7, the adjustment of the pressure alternation in the test pipe 600 is satisfied, and the control precision is high.

[0041] In specific implementation, baffles controlled by cylinders are provided in both the air outlet pipeline and the air return pipeline of the high and low temperature air duct. The cylinder drives the baffle to move to control the on-off of the air outlet pipeline or the air return pipeline. For the two air ducts with different temperature sections, when the usage temperature is below 180 °C, the baffle driven by the cylinder in the high and low temperature air duct will open, enabling the high and low temperature air duct to work normally. When the usage temperature (detecting the temperature in the test chamber using a temperature sensor) exceeds 180 °C, the baffle driven by the cylinder will automatically close to isolate the high and low temperature air duct, preventing the hot air above 180 °C from entering the high and low temperature air duct, thereby preventing the refrigerant in the high and low temperature air duct from being damaged by high temperature (above 180 °C).

[0042] Further referring to Figure 4 As shown, during the up and down reciprocating motion of the second specimen mounting block 10, the mounting surface of the first specimen mounting block 21 is used as the relative zero position of the reciprocating motion, and the amplitude of the reciprocating motion is controlled by the oil cylinder. The sliding distance of the first specimen mounting block 21 on the guide rod 19 is its maximum horizontal adjustment distance, that is, the maximum adjustment distance of the first specimen mounting block 21 relative to the second specimen mounting block 10. By horizontally adjusting the first specimen mounting block 21, the test pipe 600 mounted on the first specimen mounting block 21 and the second specimen mounting block 10 has a suitable bending radius at the relative zero position. The second specimen mounting block 10 can drive the specimen pipe to move up and down (i.e., the bending amplitude) between the high position and the low position under the drive of the oil cylinder, thereby conducting a bending test.

[0043] The high and low temperature internal pressure bending test device of the present invention has a compact structure and is convenient to operate, realizing the maximum utilization of functions; it can meet the tests of any temperature, pressure, and bending stroke within the specified range of the standard and can be adjusted steplessly; it can conduct bending tests under two different temperature sections of high and low temperature and high temperature, ensuring the continuity of the test.

[0044] Although the specific implementation manners of the present invention have been described above, those skilled in the art should understand that these are only examples, and various changes or modifications can be made to this implementation manner without departing from the principle and essence of the present invention. The protection scope of the present invention is only limited by the appended claims.

Claims

1. A high and low temperature internal pressure bending test device, characterized in that, It includes a high and low temperature test chamber, a bending reciprocating tooling, a bending power component, a horizontal moving tooling, and a pressure system; Inside the high and low temperature test chamber, there is a test cabin, a high and low temperature air duct and a high temperature air duct leading to the test cabin. The high and low temperature air duct and the high temperature air duct are respectively used to supply airflows with preset temperatures to the test cabin to meet the preset ambient temperature required for the test. The horizontal moving tooling and the bending reciprocating tooling are arranged horizontally and vertically in the test cabin. On the horizontal moving tooling, there is a first specimen mounting block used to connect to one end of the test pipe and capable of horizontal movement. On the bending reciprocating tooling, there is a second specimen mounting block connected to the other end of the test pipe and capable of vertical movement. The first specimen mounting block is horizontally moved to adjust the relative distance from the second specimen mounting block. The pressure system is arranged outside the test cabin. The pressure pipeline of the pressure system extends into the test cabin and is connected to the test pipe to provide the preset alternating internal pressure required for the test to the test pipe. The bending power component is arranged outside the test cabin. The power component of the bending power component is an oil cylinder. The output shaft of the oil cylinder is connected to the second specimen mounting block to drive the second specimen mounting block to perform vertical reciprocating motion in the test cabin, thereby driving the test pipe to conduct a bending test under the conditions of preset ambient temperature and preset internal pressure; The bending reciprocating tooling further includes two vertical chutes arranged on both sides of the second specimen mounting block. Guide sliders fixedly connected to the second specimen mounting block are arranged on the chutes. The second specimen mounting block slides up and down along the chutes with the guide sliders under the drive of the bending power component; The bending power component further includes a hydraulic pump station and a displacement sensor. The hydraulic pump station is connected to the oil cylinder to provide the power required for the oil cylinder. The output shaft of the oil cylinder is vertically connected to the second specimen mounting block. The displacement sensor is used to detect the position of the output shaft of the oil cylinder in real time; The horizontal moving tooling includes a mounting frame, a guide rod horizontally arranged on the mounting frame, and a sliding component arranged on the guide rod. The first specimen mounting block is fixed on the sliding component. The sliding component slides on the guide rod to enable the first specimen mounting block to move horizontally towards or away from the second specimen mounting block, thereby adjusting the relative distance between the first specimen mounting block and the second specimen mounting block on the same horizontal plane.

2. The high and low temperature internal pressure bending test device according to claim 1, characterized in that Vertically arranged on the second specimen mounting block is an adapter connected to the output shaft of the oil cylinder in a butt joint manner. A through hole for the adapter to pass through is correspondingly arranged on the test cabin. An insulating part is sleeved on the adapter at the through hole. The insulating part is used to seal and insulate the through hole area.

3. The high and low temperature internal pressure bending test device according to claim 2, characterized in that, At one end of the mounting frame away from the second specimen mounting block, there are two pipe joints connected to the pressure pipeline. Between the mounting frame and the first specimen mounting block, there are also two bendable adapter pipes. Each of the two pipe joints is connected to a specimen pipe installed on the first specimen mounting block through an adapter pipe, and the two specimen pipes are connected and conducted on the second specimen mounting block, so that the pressure pipeline forms a circulating path; The transfer pipeline includes a first section of pipe and a second section of pipe. One end of the first section of pipe is rotatably connected to the installation frame and communicated with the pipe joint, the other end of the first section of pipe is rotatably connected to the second section of pipe and communicated with, and the other end of the second section of pipe is rotatably connected to the first specimen mounting block and communicated with the test pipe.

4. The high and low temperature internal pressure bending test device according to claim 1, characterized in that The pressure system includes a medium box, a circulation pump, a pressure sensor, an adjusting mechanism and an air-controlled valve arranged on a pressure pipeline. The sample pipe is connected to the pressure pipeline to form a circulation passage. The medium box is connected to the pressure pipeline to provide a circulating medium. The circulation pump, the adjusting mechanism and the pressure sensor are arranged in sequence on the pressure pipeline between the medium box and the input side of the sample pipe along the medium flow direction. The air-controlled valve is arranged on the pressure pipeline between the output side of the sample pipe and the medium box.

5. The high and low temperature internal pressure bending test device according to claim 4, characterized in that, The regulating mechanism comprises a sealed cylinder head, a screw pair, a reducer and a servo spindle motor. The cylinder body of the sealed cylinder head is conductively connected in the pressure pipeline, the piston rod of the sealed cylinder head is connected to the screw pair, the reducer is transmission-connected to the screw pair, and the servo spindle motor is transmission-connected to the reducer.

6. The high and low temperature internal pressure bending test device according to claim 4, wherein, The regulating mechanism comprises a sealed cylinder head, a screw pair, a reducer and a servo spindle motor. The cylinder body of the sealed cylinder head is conductively connected in the pressure pipeline, the piston rod of the sealed cylinder head is connected to the screw pair, the reducer is transmission-connected to the screw pair, and the servo spindle motor is transmission-connected to the reducer.

7. The high and low temperature internal pressure bending test device according to claim 6, characterized in that, The preset temperature range of the airflow provided by the high and low temperature air ducts is -70~180°C, and the preset temperature range of the airflow provided by the high temperature air duct is 180~230°C.

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