A pressure resistance performance testing machine for pressure pipes capable of comparative testing

Abstract

The present invention discloses a pressure resistance performance testing machine for pressure pipelines that can be tested comparatively, belonging to the technical field of pressure pipeline testing, comprising a support frame, wherein two fixing plates are symmetrically arranged on the upper end surface of the support frame, and two electric cylinders are symmetrically installed on the sides of the pressure pipeline; further comprising: an angle adjustment mechanism, arranged between the electric cylinder and the fixing plate; a pushing assembly, arranged between the electric cylinder and the pressure pipeline; and a gas transmission assembly, arranged on the side of the output shaft of the electric cylinder. The pressure resistance performance testing machine for pressure pipelines that can be tested comparatively can automatically change the detection angle when testing the pressure pipeline, and can automatically adjust the position of the pressure pipeline, without the need to frequently adjust the pipeline or replace different testing machines, thereby improving the comprehensiveness of the detection. At the same time, when performing pressure resistance testing, the diversity of the detection can also be improved by changing the test temperature.

Description

Technical Field

[0001] The invention relates to the technical field of pressure pipeline detection, in particular to a pressure resistance performance detection machine capable of comparative detection for pressure pipelines. Background Art

[0002] Pressure pipelines refer to all pipelines that are subjected to internal or external pressure, and the interior of which is used to transport fluids of different media. Therefore, before the pressure pipeline is put into use, its pressure resistance performance needs to be tested to ensure safety during use. For example, a pipeline pressure resistance tester with publication number CN115561063A relates to the field of pipeline detection technology, including a pipeline detector body. By adopting the cooperation between the pipeline outer side walking mechanism and the infrared ranging transmitter, and the mutual cooperation between the connecting ring and the wireless walking wheel, the pipeline outer edge pressure resistance detection device is made to walk on the surface of the fixed ring as a whole to achieve a full range of detection effects, and then through the extension and retraction of the electric telescopic rod, the extrusion plate is driven to perform extrusion and movement detection on the surface of the pipeline to be detected. With the setting of the infrared ranging transmitter and the display, the surveying distance and the preset value can be transmitted to the outside world. An alarm is set on the top, and the alarm sounds when the preset value is exceeded, which is convenient for the detection of the detection personnel, and at the same time improves the accuracy and timeliness of the pressure resistance detection data;

[0003] For example, a pipeline external pressure detection device with publication number CN110873629B includes a sleeve, a fixing device, a detection device and a support device, the fixing device includes a fixing part and a sealing part, the detection device includes a pressure gauge, a pressure relief valve and a booster device; the support device includes a symmetrically arranged support rod, a support frame, an active rod, a driven rod and a power part, and the support rod is bent and formed, which can improve the quality of pipeline tightness detection and facilitate movement, so as to effectively detect pipelines at different positions and improve work efficiency. However, the above-mentioned pressure resistance detector still has the following disadvantages in actual use:

[0004] 1. When testing pressure pipes, traditional pressure resistance testers can only test the same angle of the pipe. When testing different angles of the pressure pipe, it is necessary to first release the limit of the pipe, and then change the test angle by adjusting the pipe angle. In addition, the position of the pressure pipe needs to be adjusted frequently to achieve pressure resistance testing at different positions, which increases the complexity of the test operation.

[0005] 2. At the same time, most traditional pressure resistance performance testing machines can only perform testing by applying pressure to the pressure pipeline. Since different pressure pipelines convey different media and have different temperatures, there is a lack of a structure to change the test temperature when performing pressure resistance testing on the pressure pipeline.

[0006] In view of the above problems, it is urgent to carry out innovative design based on the original pressure resistance performance testing machine. Summary of the invention

[0007] The object of the present invention is to provide a pressure resistance performance testing machine for pressure pipelines that can be used for comparative testing, so as to solve the problem that the traditional pressure resistance performance testing machine proposed in the above background technology is not convenient for testing different angles and positions of the pressure pipeline, requires frequent adjustment of the position of the pipeline, and also lacks a structure for changing the test temperature when performing pressure resistance testing on the pressure pipeline.

[0008] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a pressure resistance performance tester for pressure pipes that can be compared and tested, comprising a support frame, two fixing plates are symmetrically arranged on the upper end surface of the support frame, and the pressure pipe to be tested is penetrated through the hole at the center of the fixing plate, two electric cylinders are symmetrically installed on the sides of the pressure pipe, and the output shaft of the electric cylinder is connected to a detection pressure plate, and the cross section of the detection pressure plate is a curved surface structure;

[0009] It also includes: an angle adjustment mechanism, which is arranged between the electric cylinder and the fixed plate, and the angle adjustment mechanism is used to detect the angle conversion when the pressure plate is away from the pressure pipe;

[0010] A pushing component is arranged between the electric cylinder and the pressure pipeline, and is used to push the pressure pipeline to move when the pressure plate is detected to be away from the pressure pipeline;

[0011] The air delivery component is arranged on the side of the output shaft of the electric cylinder, and the air delivery component is used to provide hot air when the pressure plate detects the pressure pipeline.

[0012] Preferably, the angle adjustment mechanism includes a guide rod fixed to one side of the output shaft of the electric cylinder, and the end of the guide rod away from the output shaft of the electric cylinder is slidably connected to the guide groove, and the guide groove is opened on the side of the fixed plate, and when the output shaft of the electric cylinder moves, it can drive the guide rod to slide in the guide groove.

[0013] Preferably, the guide groove consists of a fixed groove and a connecting groove, and the fixed groove and the connecting groove are distributed at equal angles on the fixed plate, and the fixed groove and the pressure pipe are perpendicular to each other. At the same time, adjacent fixed grooves are connected through connecting grooves. When the guide rod slides in the fixed groove, it can drive the detection pressure plate to approach the pressure pipe, and when the guide rod slides in the connecting groove, it can drive the electric cylinder to rotate a certain angle.

[0014] Preferably, a fixing rod is provided on one side of the electric cylinder close to the fixing plate, and the fixing rod and the limiting groove are slidably connected, and the limiting groove is opened at the edge of the fixing plate. At the same time, the limiting groove is an annular structure. When the electric cylinder rotates, it can drive the fixing rod to slide in the limiting groove, thereby ensuring the stability of the rotation.

[0015] Preferably, the pushing assembly includes a fixed ring fixed to the side of the electric cylinder, and the outer surface of the fixed ring is provided with tooth blocks at equal angles, and the top of the tooth block is meshingly connected with a gear, and at the same time, a movable cylinder is fixed inside the gear and penetrates it. When the electric cylinder rotates, it can drive the fixed ring to rotate synchronously, and drive the movable cylinder to rotate through the meshing transmission of the tooth block and the gear.

[0016] Preferably, the inner top surfaces of the movable cylinder and the support frame form a relatively rotating structure, and a push rod is threaded through the end of the movable cylinder, and the horizontal section of the push rod is provided with two thread grooves in opposite directions. At the same time, the push rod is an inverted "L" shaped structure. When the movable cylinder rotates, it can drive the push rod and the support block to move synchronously through the thread transmission with the push rod.

[0017] Preferably, a limit block is fixedly sleeved on one end of the push rod away from the movable cylinder, and the top of the limit block slides in contact with the inner top surface of the support frame, and a truncated cone-shaped support block is fixed to the vertical end of the push rod. At the same time, the support block is snap-fitted to the inner wall of the pressure pipe. When the support block moves, it can push the pressure pipe to move inside the fixed plate, thereby realizing pressure resistance testing of different positions.

[0018] Preferably, the air delivery assembly includes a connecting pipe fixed to the other end of the output shaft of the electric cylinder, and a piston block is fixed to the end of the connecting pipe away from the output shaft of the electric cylinder, and a fixing cylinder is sleeved on the outer side of the piston block, and the fixing cylinder is symmetrically fixed to the inner wall of the fixing ring. When the output shaft of the electric cylinder moves, the piston block can be driven to move synchronously in the fixing cylinder through the connecting pipe.

[0019] Preferably, the edge of the piston block slides in contact with the inner wall of the fixed cylinder, and the side of the fixed cylinder and the surface of the piston block are provided with a one-way air intake valve, and the piston block is hollow inside, and a heating block is installed inside the fixed cylinder. When the piston block moves, it can draw external air into the fixed cylinder, and then when it moves in the other direction, it can squeeze the gas in the fixed cylinder into the connecting tube.

[0020] Preferably, the interior of the fixed cylinder is interconnected through a one-way air inlet valve and a piston block, and the piston block is connected to the fixed cavity through a connecting pipe, and the fixed cavity is arranged in the output shaft of the electric cylinder, and at the same time, the fixed cavity and the internal cavity of the detection pressure plate are connected, and air outlet holes are evenly reserved on the surface of the detection pressure plate close to the pressure pipe, and the gas in the connecting pipe can be transmitted to the detection pressure plate through the fixed cavity, and finally discharged from the air outlet holes.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows: the pressure resistance performance testing machine for pressure pipes can automatically change the detection angle and automatically adjust the position of the pressure pipes when testing the pressure pipes, without the need to frequently adjust the pipes or replace different testing machines, thereby improving the comprehensiveness of the testing. At the same time, when performing pressure resistance testing, the diversity of the testing can be improved by changing the test temperature. The specific contents are as follows:

[0022] 1. When the electric cylinder is pushed, its output shaft drives the guide rod to slide in the fixed groove, thereby ensuring that the detection platen is vertically close to the pressure pipe. After completing one test, the electric cylinder drives the detection platen away from the pressure pipe. At this time, the guide rod slides in the inclined connection groove, and the electric cylinder can be driven to rotate during the sliding process. Therefore, each time the detection platen is away from the pressure pipe, it can drive the electric cylinder to rotate a certain angle, so that it is convenient to contact the pressure pipe at different angles when testing it next time;

[0023] 2. When the electric cylinder rotates, it can drive the fixed ring to rotate synchronously, drive the movable cylinder to rotate through the meshing transmission of the tooth block and the gear, and then drive the support block to move through the threaded transmission with the push rod. Therefore, when the detection pressure plate is away from the pressure pipe, it can not only drive the electric cylinder to rotate a certain angle, but also push the pressure pipe to move a certain distance, and realize the detection of its different positions;

[0024] 3. When the output shaft of the electric cylinder extends, it can drive the connecting pipe to move synchronously, drive the piston block to move in the fixed cylinder, and squeeze the gas in the fixed cylinder into the inside of the piston block through the one-way air intake valve. The gas is then transmitted to the fixed cavity through the connecting pipe, and then transmitted to the cavity of the detection platen, and finally discharged from the air outlet. In this way, when the detection platen approaches the pressure pipe for detection, hot air can be blown from the air outlet to the pressure pipe. In the process of pressure resistance detection, hot air can be added to achieve diversified detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a front view structural schematic diagram of the present invention;

[0026] Figure 2 It is a schematic diagram of the side structure of the fixing plate of the present invention;

[0027] Figure 3 It is a schematic diagram of the front cross-section structure of the fixing plate of the present invention;

[0028] Figure 4 It is a partial side view structural schematic diagram of the present invention;

[0029] Figure 5 It is a schematic diagram of the connection structure of the electric cylinder and the fixing plate of the present invention from a side view;

[0030] Figure 6 It is a schematic diagram of the side-section connection structure of the electric cylinder and the fixing plate of the present invention;

[0031] Figure 7 It is a schematic diagram of the side view structure of the fixing ring of the present invention;

[0032] Figure 8 It is a schematic diagram of the front cross-section structure of the fixed tube of the present invention;

[0033] Fig. 9 It is a schematic diagram of the top view structure of the detection pressure plate of the present invention.

[0034] In the figure: 1. support frame; 2. fixing plate; 3. pressure pipe; 4. electric cylinder; 41. fixing chamber; 5. detection pressure plate; 51. air outlet; 6. guide rod; 7. guide groove; 71. fixing groove; 72. connecting groove; 8. fixing rod; 9. limiting groove; 10. fixing ring; 11. gear block; 12. gear; 13. movable cylinder; 14. push rod; 15. limiting block; 16. support block; 17. connecting pipe; 18. piston block; 19. fixing cylinder; 20. one-way air intake valve; 21. heating block. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only 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.

[0036] See also Figure 1-Figure 9 , the present invention provides the following technical solutions:

[0037] Embodiment 1: In order to solve the problems existing in the prior art, this embodiment adopts the following technical scheme: a pressure resistance performance testing machine for pressure pipelines that can be compared and tested, including a support frame 1, two fixed plates 2 are symmetrically arranged on the upper end surface of the support frame 1, and the pressure pipeline 3 to be tested is penetrated through the hole at the center of the fixed plate 2, and two electric cylinders 4 are symmetrically installed on the sides of the pressure pipeline 3, and the output shaft of the electric cylinder 4 is connected to a detection pressure plate 5, and the cross-section of the detection pressure plate 5 is an arc surface structure; it also includes: an angle adjustment mechanism, which is arranged between the electric cylinder 4 and the fixed plate 2, and the angle adjustment mechanism is used to detect the angle change when the pressure plate 5 is away from the pressure pipeline 3; a pushing component, which is arranged between the electric cylinder 4 and the pressure pipeline 3, and the pushing component is used to push the pressure pipeline 3 to move when the detection pressure plate 5 is away from the pressure pipeline 3; an air supply component, which is arranged on the side of the output shaft of the electric cylinder 4, and the air supply component is used to provide hot air when the detection pressure plate 5 detects the pressure pipeline 3.

[0038] When the existing pressure resistance performance testing machine detects the pressure pipeline 3, most of them can only detect the same angle of the pipeline. When it is necessary to detect different angles of the pressure pipeline 3, it is necessary to first release the limit of the pipeline, and then change the detection angle by adjusting the pipeline angle, such as Figure 1-Figure 2 and Figure 5-Figure 6 As shown, the angle adjustment mechanism includes a guide rod 6 fixed to one side of the output shaft of the electric cylinder 4, and the end of the guide rod 6 away from the output shaft of the electric cylinder 4 is slidably connected to the guide groove 7, and the guide groove 7 is opened on the side of the fixed plate 2; the guide groove 7 is composed of a fixing groove 71 and a connecting groove 72, and the fixing groove 71 and the connecting groove 72 are both distributed at equal angles on the fixed plate 2, and the fixing groove 71 is perpendicular to the pressure pipe 3, and the adjacent fixing grooves 71 are connected by the connecting groove 72; a fixing rod 8 is provided on the side of the electric cylinder 4 close to the fixed plate 2, and the fixing rod 8 and the limiting groove 9 are slidably connected, and the limiting groove 9 is opened at the edge of the fixed plate 2, and the limiting groove 9 is an annular structure; the pressure pipe 3 to be tested is passed through the hole in the fixed plate 2, and the inside of the pressure pipe 3 is stuck on the outside of the support block 16, so that the pressure pipe 3 is between the fixed plate 2 and the support block 16 to facilitate the subsequent pressure resistance test, and then the electric cylinder 4 is operated to push the detection plate 5 to move, driving the detection When the pressure measuring plate 5 approaches the pressure pipe 3, the pressure pipe 3 is squeezed simultaneously by two mutually approaching detection pressure plates 5 to detect its pressure resistance. When the electric cylinder 4 pushes, its output shaft drives the guide rod 6 to slide in the fixing groove 71, thereby ensuring that the detection pressure plate 5 is vertically close to the pressure pipe 3. After completing one detection, the electric cylinder 4 drives the detection pressure plate 5 away from the pressure pipe 3. At this time, the output shaft of the electric cylinder 4 drives the guide rod 6 to slide in the inclined connecting groove 72. During the sliding process, the electric cylinder 4 can be driven to rotate, and the electric cylinder 4 drives the fixing rod 8 to slide in the limiting groove 9. Therefore, each time the detection pressure plate 5 is away from the pressure pipe 3 for detection, it can drive the electric cylinder 4 to rotate a certain angle, so that it is convenient to contact the pressure pipe 3 at different angles when detecting it next time, thereby improving the comprehensiveness of the detection, and the detection structure is symmetrically arranged at both ends of the support frame 1, which is convenient for simultaneous operation of the pressure resistance detection of the two pressure pipes 3, so that the detection status can be compared and observed.

[0039] Embodiment 2: The existing pressure resistance performance testing machine also needs to frequently adjust the position of the pressure pipe 3 to achieve the pressure resistance test at different positions, which increases the complexity of the test operation. Therefore, this embodiment adopts the following technical solutions, such as Figure 1 , Figure 3-Figure 4 and Figure 7As shown, the pushing assembly includes a fixing ring 10 fixed to the side of the electric cylinder 4, and the outer surface of the fixing ring 10 is provided with a tooth block 11 at an equal angle, and the upper part of the tooth block 11 is meshed with a gear 12, and the inner part of the gear 12 is fixedly penetrated by a movable cylinder 13; the movable cylinder 13 and the inner top surface of the support frame 1 form a relatively rotating structure, and the end of the movable cylinder 13 is threadedly penetrated by a push rod 14, and the horizontal section of the push rod 14 is provided with two thread grooves in opposite directions, and the push rod 14 is an inverted "L"-shaped structure; the end of the push rod 14 away from the movable cylinder 13 is fixedly sleeved with a limit block 15, and the top of the limit block 15 slides in contact with the inner top surface of the support frame 1, and the vertical end of the push rod 14 is fixed with a truncated cone-shaped support block 16, and the support block 16 is snap-connected with the inner wall of the pressure pipe 3; the electric When the cylinder 4 rotates, it can drive the fixed ring 10 to rotate synchronously. Therefore, when the fixed ring 10 rotates a certain angle, it can drive the gear 12 and the movable cylinder 13 to rotate through the meshing transmission of the tooth block 11 and the gear 12. The threaded transmission between the movable cylinder 13 and the push rod 14 can drive the push rod 14 to move horizontally. When the push rod 14 moves, it drives the limit block 15 to slide on the inner top surface of the support frame 1, so as to ensure the stability of the movement. Therefore, when the detection pressure plate 5 is away from the pressure pipe 3, it can not only drive the electric cylinder 4 to rotate a certain angle, but also drive the support block 16 to move through the push rod 14, and promote the synchronous movement of the pressure pipe 3 to realize the detection of different positions. In this way, it only needs to push the electric cylinder 4 repeatedly to realize the detection of different angles and positions of the pressure pipe 3, thereby further improving the comprehensiveness of the detection.

[0040] Embodiment 3: Most of the existing pressure resistance performance testing machines can only perform testing by applying pressure to the pressure pipe 3. Since different pressure pipes 3 convey different media and different temperatures of the media, there is no structure for changing the test temperature when performing pressure resistance testing on the pressure pipe 3. Therefore, this embodiment adopts the following technical solutions, such as Figure 1 and Figure 8-Figure 9As shown, the gas delivery assembly includes a connecting pipe 17 fixed to the other end of the output shaft of the electric cylinder 4, and a piston block 18 is fixed to one end of the connecting pipe 17 away from the output shaft of the electric cylinder 4, and a fixing cylinder 19 is sleeved on the outer side of the piston block 18, and the fixing cylinder 19 is symmetrically fixed to the inner wall of the fixing ring 10; the edge of the piston block 18 fits and slides with the inner wall of the fixing cylinder 19, and the side of the fixing cylinder 19 and the surface of the piston block 18 are provided with a one-way air intake valve 20, and the piston block 18 is hollow, and a heating block 21 is installed inside the fixing cylinder 19; the interior of the fixing cylinder 19 is connected to the piston block 18 through the one-way air intake valve 20, and the piston block 18 is connected to the fixing cavity 41 through the connecting pipe 17, and the fixing cavity 41 is arranged in the output shaft of the electric cylinder 4, and the fixing cavity 41 is connected to the internal cavity of the detection pressure plate 5, and the surface of the detection pressure plate 5 close to the pressure pipe 3 is evenly reserved with air outlet holes 51; when the output shaft of the electric cylinder 4 is extended, it can drive the connecting pipe 17 to move synchronously, and the connecting pipe 17 drives the piston block 18 to move in the fixed cylinder 19, and then squeezes the gas in the fixed cylinder 19 into its interior through the one-way air intake valve 20 on the piston block 18. At this time, the gas is heated by the heating block 21 and is in a high-temperature state. The gas is then transmitted to the fixed cavity 41 through the connecting pipe 17, and then transmitted to the cavity of the detection pressure plate 5, and finally can be discharged from the air outlet 51. In this way, when the detection pressure plate 5 approaches the pressure pipe 3 for detection, the hot gas can be blown toward the pressure pipe 3 from the air outlet 51. In the process of pressure resistance detection, the hot gas is added to realize diversified detection. When the output shaft of the electric cylinder 4 is retracted, it can drive the connecting pipe 17 to push the piston block 18 to move in the opposite direction in the fixed cylinder 19, and then the external gas is drawn into it through the one-way air intake valve 20 on the fixed cylinder 19, so as to be discharged for the next heating.

[0041] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A pressure resistance performance testing machine for pressure pipes capable of comparative testing, comprising a support frame (1), two fixing plates (2) being symmetrically arranged on the upper end surface of the support frame (1), a pressure pipe (3) to be tested being passed through a hole at the center of the fixing plate (2), two electric cylinders (4) being symmetrically installed on the sides of the pressure pipe (3), a testing pressure plate (5) being connected to the output shaft of the electric cylinder (4), and a cross section of the testing pressure plate (5) being a curved surface structure; It is characterized in that Also includes: An angle adjustment mechanism is arranged between the electric cylinder (4) and the fixing plate (2), and is used to detect the change in angle when the pressing plate (5) is away from the pressure pipe (3); A pushing component is arranged between the electric cylinder (4) and the pressure pipe (3), and is used to push the pressure pipe (3) to move when the pressure plate (5) moves away from the pressure pipe (3); An air delivery component is arranged on the side of the output shaft of the electric cylinder (4), and is used to provide hot air when the pressure plate (5) detects the pressure pipeline (3); The angle adjustment mechanism comprises a guide rod (6) fixed to one side of the output shaft of the electric cylinder (4), and one end of the guide rod (6) away from the output shaft of the electric cylinder (4) is slidably connected to a guide groove (7), and the guide groove (7) is provided on a side of the fixing plate (2); The guide groove (7) is composed of a fixing groove (71) and a connecting groove (72), and the fixing groove (71) and the connecting groove (72) are both distributed at equal angles on the fixing plate (2), and the fixing groove (71) and the pressure pipe (3) are perpendicular to each other, and adjacent fixing grooves (71) are connected via the connecting groove (72).

2. A pressure resistance performance testing machine for pressure pipes capable of comparative testing according to claim 1, characterized in that: A fixing rod (8) is provided on one side of the electric cylinder (4) close to the fixing plate (2), and the fixing rod (8) and the limiting groove (9) are slidably connected, and the limiting groove (9) is provided at the edge of the fixing plate (2), and the limiting groove (9) is an annular structure.

3. The pressure resistance performance testing machine for pressure pipes capable of comparative testing according to claim 1, characterized in that: The pushing assembly comprises a fixing ring (10) fixed to the side of the electric cylinder (4), and tooth blocks (11) are arranged at equal angles on the outer surface of the fixing ring (10), and a gear (12) is meshedly connected above the tooth block (11), and a movable cylinder (13) is fixedly passed through the interior of the gear (12).

4. A pressure resistance performance testing machine for pressure pipes capable of comparative testing according to claim 3, characterized in that: The movable cylinder (13) and the inner top surface of the support frame (1) form a relatively rotating structure, and a push rod (14) is threadedly penetrated through the end of the movable cylinder (13), and the horizontal section of the push rod (14) is provided with two thread grooves in opposite directions, and the push rod (14) is an inverted "L"-shaped structure.

5. The pressure resistance performance testing machine for pressure pipes capable of comparative testing according to claim 4, characterized in that: A limit block (15) is fixedly sleeved on one end of the push rod (14) away from the movable cylinder (13), and the top of the limit block (15) slides in contact with the inner top surface of the support frame (1), and a truncated cone-shaped support block (16) is fixed to the vertical end of the push rod (14), and the support block (16) is snap-fittedly connected to the inner wall of the pressure pipe (3).

6. The pressure resistance performance testing machine for pressure pipes capable of comparative testing according to claim 1, characterized in that: The gas delivery assembly comprises a connecting pipe (17) fixed to the other end of the output shaft of the electric cylinder (4), a piston block (18) is fixed to one end of the connecting pipe (17) away from the output shaft of the electric cylinder (4), and a fixing cylinder (19) is sleeved on the outer side of the piston block (18), and the fixing cylinder (19) is symmetrically fixed to the inner wall of the fixing ring (10).

7. A pressure resistance performance testing machine for pressure pipes capable of comparative testing according to claim 6, characterized in that: The edge of the piston block (18) slides in contact with the inner wall of the fixed cylinder (19), and a one-way air intake valve (20) is provided on the side of the fixed cylinder (19) and the surface of the piston block (18). The piston block (18) is hollow inside, and a heating block (21) is installed inside the fixed cylinder (19).

8. The pressure resistance performance testing machine for pressure pipes capable of comparative testing according to claim 7, characterized in that: The interior of the fixed cylinder (19) is communicated with the piston block (18) via a one-way air inlet valve (20), and the piston block (18) is communicated with the fixed chamber (41) via a connecting pipe (17), and the fixed chamber (41) is arranged in the output shaft of the electric cylinder (4), and the fixed chamber (41) is communicated with the internal cavity of the detection pressure plate (5), and air outlet holes (51) are evenly reserved on the surface of the detection pressure plate (5) close to the pressure pipe (3).

Images