A pipe simple supported beam impact test device

Abstract

This utility model belongs to the technical field of testing equipment, specifically relating to a pipe simply supported beam impact testing device, including a frame. A base is fixedly connected to the bottom inner side of the frame. A limit mechanism and a test frame are fixedly connected to the top of the base. A torque motor is slidably connected to the top of the side wall of the test frame away from the limit mechanism. The shaft of the torque motor passes through the test frame and is fixedly connected to an outer shaft. A pendulum is rotatably connected to the other end of the outer shaft. A connecting rod is fixedly connected to the side wall of the outer shaft. A pair of mounting plates are fixedly connected to the two side walls of the other end of the connecting rod. A blocking cylinder is disposed between the pair of mounting plates. The beneficial effect of this utility model is that it allows for adjustment of the pendulum height, thereby adjusting the height of the contact position between the pendulum and the specimen. This ensures that the impact part of the pendulum always impacts the specimen when testing specimens of different sizes, improving the applicability of the equipment.

Description

Technical Field

[0001] This utility model relates to the field of testing equipment technology, specifically to a pipe simply supported beam impact testing device. Background Technology

[0002] The simply supported beam impact test for pipes is a core method for evaluating the fracture resistance of pipes under dynamic loads, and is widely used in the quality control and R&D of plastic, metal, and composite pipes. This test simulates sudden impacts (such as falling object impacts or low-temperature brittle fracture) experienced by pipes in actual working conditions, quantifying their energy absorption capacity and toughness, and providing crucial data support for engineering safety design. Based on the principle of energy conservation, the test involves processing the pipe into standard specimens (such as strip specimens without notches or with V / U-shaped notches), placing them between two supports of a simply supported beam impact testing machine to form a three-point bending structure. A pendulum is released from a preset height and impacts the specimen at a specific velocity. The impact strength is calculated by measuring the energy difference before and after the impact (i.e., the energy absorbed by the specimen upon fracture).

[0003] However, existing simply supported beam impact testing machines, in order to ensure that the impact force received by the specimens is consistent, do not make it convenient to adjust the position of the pendulum on the pendulum rod. As a result, the testing machine can only test specimens of a certain size range. It is difficult to test some specimens that are larger in size and whose materials are not easy to cut, resulting in low applicability. Moreover, the pendulum usually needs to be released manually during the test. When the pipe is impacted and breaks, it can easily cause injury to the operator, posing a safety hazard. Utility Model Content

[0004] The purpose of this invention is to solve the problems of low applicability and safety hazards of existing simply supported beam impact testing machines.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A pipe simply supported beam impact testing device includes a frame, a pair of cabinet doors rotatably connected to both sides of the frame's sidewalls, several supports fixedly connected to the bottom of the frame, a base fixedly connected to the inner bottom of the frame, a limit mechanism and a test frame fixedly connected to the top of the base, a torque motor slidably connected to the top of the test frame's sidewall away from the limit mechanism, an outer shaft fixedly connected to the shaft of the torque motor passing through the test frame, a swing rod rotatably connected to the other end of the outer shaft, a connecting rod fixedly connected to the sidewall of the outer shaft, a pair of mounting plates fixedly connected to the sidewalls of the other end of the connecting rod, a blocking cylinder arranged between the pair of mounting plates, a contoured stop fixedly connected to the piston rod of the blocking cylinder, and a lifting mechanism arranged below the torque motor.

[0007] Furthermore, the outer sleeve shaft is perpendicular to the side wall of the test frame, the swing arm is perpendicular to the outer sleeve shaft, and the lifting mechanism is perpendicular to the base.

[0008] Furthermore, a pendulum is fixedly connected to the end of the pendulum rod away from the outer sleeve shaft, and an impact part is provided on the side wall of the pendulum.

[0009] Furthermore, the limiting mechanism includes a base plate, on which a pair of support plates are symmetrically fixedly connected on both sides of the top of the base plate. The support plates are arranged parallel to the test frame, and a limiting block is detachably provided on the top of each support plate.

[0010] Furthermore, the pendulum is located between a pair of limiting blocks.

[0011] Furthermore, an angle measuring plate is provided on the outer side of the outer sleeve shaft, and several scale lines are provided on the side wall edge of the angle measuring plate. The angle measuring plate is slidably connected to the side wall of the test frame, and the outer sleeve shaft is rotatably connected to the axis of the angle measuring plate. A pointer is fixedly connected to the top of the swing rod on the side away from the outer sleeve shaft.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] 1. The present invention relates to a pipe simply supported beam impact testing device, which, by setting up a lifting mechanism, a torque motor and an outer shaft, can realize the adjustment of the height of the pendulum, thereby adjusting the height of the contact position between the pendulum and the specimen, so that the impact part of the pendulum can always impact the specimen when testing specimens of different sizes, thus improving the applicability of the device.

[0014] 2. The pipe simply supported beam impact testing equipment of this utility model, by setting up a blocking cylinder, a conforming block and a cabinet door, can realize the automatic reset and release of the pendulum, and protect the operator when the pendulum collides with the specimen, so as to avoid damage to the operator due to specimen breakage during manual release, thereby improving the safety of the equipment. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of a simply supported beam impact testing device for pipes according to this utility model.

[0016] Figure 2 This is a schematic diagram of the test frame and limiting mechanism of a simply supported beam impact testing device for pipes according to this utility model.

[0017] Figure 3 This is a front view schematic diagram of the test frame and limiting mechanism of a simply supported beam impact testing device for pipes according to this utility model.

[0018] Figure 4This is a side view schematic diagram of the test frame and limiting mechanism of a simply supported beam impact testing device for pipes according to this utility model.

[0019] In the diagram: 1. Frame; 2. Cabinet door; 3. Bracket; 4. Base; 5. Test frame; 6. Limiting mechanism; 7. Angle measuring plate; 8. Outer shaft; 9. Pointer; 10. Swing rod; 11. Pendulum; 12. Impact part; 13. Base plate; 14. Support plate; 15. Limiting block; 16. Torque motor; 17. Connecting rod; 18. Mounting plate; 19. Blocking cylinder; 20. Contour stop; 21. Lifting mechanism. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figure 1-4The pipe simply supported beam impact testing equipment of this embodiment includes a frame 1. A pair of cabinet doors 2 are rotatably connected to both sides of the side wall of the frame 1. Several supports 3 are fixedly connected to the bottom of the frame 1. A base 4 is fixedly connected to the bottom inner side of the frame 1. A limiting mechanism 6 and a test frame 5 are fixedly connected to the top of the base 4. The limiting mechanism 6 is used to limit the placement of the test specimen. A torque motor 16 is slidably connected to the top of the side wall of the test frame 5 away from the limiting mechanism 6. The rotating shaft of the torque motor 16 passes through the test frame 5 and is fixedly connected to an outer shaft 8. A swing rod 1 is rotatably connected to the other end of the outer shaft 8. 0. A connecting rod 17 is fixedly connected to the side wall of the outer sleeve shaft 8. A pair of mounting plates 18 are fixedly connected to the side walls of the other end of the connecting rod 17. A blocking cylinder 19 is provided between the pair of mounting plates 18. A contour block 20 is fixedly connected to the piston rod of the blocking cylinder 19. A lifting mechanism 21 is provided on the lower side of the torque motor 16. The outer sleeve shaft 8 is perpendicular to the side wall of the test frame 5. The swing rod 10 is perpendicular to the outer sleeve shaft 8. The lifting mechanism 21 is perpendicular to the base 4. A pendulum 11 is fixedly connected to the end of the swing rod 10 away from the outer sleeve shaft 8. An impact part 12 is provided on the side wall of the pendulum 11. During testing, the specimen is placed on top of the limiting mechanism 6 and limited by the limiting mechanism 6. Then, the cabinet door 2 is closed, and the height of the pendulum 11 is adjusted according to the size of the specimen. During adjustment, the lifting mechanism 21 drives the torque motor 16 to move vertically, causing the outer shaft 8 and the pendulum rod 10 to move accordingly. When the pendulum rod 10 moves, it drives the pendulum 11 and the impact part 12 to move accordingly until the middle of the impact part 12 matches the height of the specimen. After adjustment, the blocking cylinder 19 drives the contour block 20 to extend, limiting the pendulum rod 10. Then, the torque motor 16 drives the outer shaft 8 to rotate counterclockwise, causing the connecting rod 17 and the blocking cylinder 19 to move accordingly. When rotating, the contouring stop 20 and the pendulum 10 begin to rotate around the outer shaft 8 until the pendulum 10 rotates to the test position and stops. Then, the blocking cylinder 19 drives the contouring stop 20 to reset, causing it to disengage from the pendulum 10. At this time, the pendulum 10 rotates downward under the gravity of the pendulum 11 until the impact part 12 impacts the specimen, thus testing the strength of the specimen. Through the above steps, the height of the pendulum 11 can be adjusted, thereby adjusting the height of the contact position between the pendulum 11 and the specimen. This ensures that the impact part 12 of the pendulum 11 can always impact the specimen when testing specimens of different sizes, improving the applicability of the equipment. It also enables the automatic release of the pendulum 11, improving the safety of the equipment.

[0022] The limiting mechanism 6 includes a base plate 13, on which a pair of support plates 14 are symmetrically fixedly connected on both sides of the top of the base plate 13. The support plates 14 are arranged parallel to the test frame 5, and each support plate 14 has a detachable limiting block 15 on its top. The pendulum 12 is located between the pair of limiting blocks 15. When placing the specimen, it is placed horizontally between the pair of limiting blocks 15, so that both ends of the specimen are located on the top of the limiting blocks 15 and are in close contact with the side walls of the limiting blocks 15.

[0023] An angle measuring plate 7 is provided on the outer side of the outer shaft 8. Several scale lines are provided on the side wall edge of the angle measuring plate 7. The angle measuring plate 7 is slidably connected to the side wall of the test frame 5. The outer shaft 8 is rotatably connected to the axis of the angle measuring plate 7. A pointer 9 is fixedly connected to the top of the swing rod 10 away from the outer shaft 8. When the swing rod 10 rotates, it drives the pointer 9 to rotate along the edge of the angle measuring plate 7. The angle of rotation of the swing rod 10 can be displayed in real time through the pointer 9 and the angle measuring plate 7, which facilitates the control of the rotation angle of the swing rod 10. When the outer shaft 8 is raised and lowered, it drives the angle measuring plate 7 to move accordingly, so that the outer shaft 8 and the angle measuring plate 7 always remain coaxial.

[0024] Working principle: During testing, the specimen is placed on top of the limiting mechanism 6, which limits its movement. The specimen is placed horizontally between a pair of limiting blocks 15, with both ends positioned on top of the limiting blocks 15 and in close contact with their sidewalls. Then, the cabinet door 2 is closed, and the height of the pendulum 11 is adjusted according to the specimen's dimensions. During adjustment, the lifting mechanism 21 drives the torque motor 16 to move vertically, causing the outer shaft 8 and pendulum rod 10 to move accordingly. The pendulum rod 10's movement drives the pendulum 11 and impact part 12 until the middle of the impact part 12 matches the specimen's height. The outer shaft 8's lifting motion drives the angle measuring plate 7 to move, ensuring the outer shaft 8 and angle measuring plate 7 remain coaxial. After adjustment, the blocking cylinder 19 drives the contour block 20 to extend, limiting the pendulum rod 10. Then, the torque motor 16 drives the outer shaft 8 to rotate counterclockwise, causing the connecting rod 17 and the... The blocking cylinder 19 moves accordingly. When the blocking cylinder 19 rotates, it drives the contour block 20 and the pendulum 10 to rotate around the outer shaft 8 until the pendulum 10 rotates to the test position and stops. Then, the blocking cylinder 19 drives the contour block 20 to reset, so that it disengages from the pendulum 10. At this time, the pendulum 10 rotates downward under the gravity of the pendulum 11 until the impact part 12 impacts the specimen, and the strength of the specimen is tested. When the pendulum 10 rotates, it drives the pointer 9 to rotate at the edge of the angle measuring plate 7. The pointer 9 and the angle measuring plate 7 can display the rotation angle of the pendulum 10 in real time, which is convenient for controlling the rotation angle of the pendulum 10. Through the above steps, the height of the pendulum 11 can be adjusted, thereby adjusting the height of the contact position between the pendulum 11 and the specimen. This ensures that the impact part 12 of the pendulum 11 can always impact the specimen when testing specimens of different sizes, improving the applicability of the equipment. It can also realize the automatic release of the pendulum 11, improving the safety of the equipment.

[0025] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A pipe-supported beam impact testing device, characterized in that: The machine includes a frame (1), on which a pair of cabinet doors (2) are rotatably connected on both sides of the side wall. Several brackets (3) are fixedly connected to the bottom of the frame (1). A base (4) is fixedly connected to the bottom inner side of the frame (1). A limit mechanism (6) and a test frame (5) are fixedly connected to the top of the base (4). A torque motor (16) is slidably connected to the top of the side wall of the test frame (5) away from the limit mechanism (6). The shaft of the torque motor (16) passes through the test frame (5). The outer shaft (8) is fixedly connected, and the other end of the outer shaft (8) is rotatably connected to the rocker arm (10). The side wall of the outer shaft (8) is fixedly connected to the connecting rod (17). The two side walls of the other end of the connecting rod (17) are fixedly connected to a pair of mounting plates (18). A blocking cylinder (19) is provided between the pair of mounting plates (18). The piston rod of the blocking cylinder (19) is fixedly connected to a contour block (20). A lifting mechanism (21) is provided on the lower side of the torque motor (16).

2. The pipe simply supported beam impact testing equipment according to claim 1, characterized in that: The outer sleeve shaft (8) is perpendicular to the side wall of the test frame (5), the swing arm (10) is perpendicular to the outer sleeve shaft (8), and the lifting mechanism (21) is perpendicular to the base (4).

3. The pipe simply supported beam impact testing equipment according to claim 1, characterized in that: The pendulum (10) is fixedly connected to a pendulum (11) at the end away from the outer sleeve shaft (8), and the side wall of the pendulum (11) is provided with an impact part (12).

4. The pipe simply supported beam impact testing equipment according to claim 3, characterized in that: The limiting mechanism (6) includes a base plate (13), and a pair of support plates (14) are symmetrically fixedly connected on both sides of the top of the base plate (13). The support plates (14) are arranged parallel to the test frame (5), and each support plate (14) is detachably provided with a limiting block (15) on its top.

5. The pipe simply supported beam impact testing equipment according to claim 4, characterized in that: The pendulum (11) is located between a pair of limiting blocks (15).

6. The pipe simply supported beam impact testing equipment according to claim 1, characterized in that: An angle measuring plate (7) is provided on the outer side of the outer shaft (8). Several scale lines are provided on the side wall edge of the angle measuring plate (7). The angle measuring plate (7) is slidably connected to the side wall of the test frame (5). The outer shaft (8) is rotatably connected to the axis of the angle measuring plate (7). A pointer (9) is fixedly connected to the top of the swing rod (10) on the side away from the outer shaft (8).

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