Horizontal loading device for bending fatigue test of simply supported beam

Abstract

The utility model discloses a horizontal loading device for a bending fatigue test of a simply supported beam, and relates to the technical field of bridge construction. The horizontal loading device for the bending fatigue test of the simply supported beam comprises a test platform, a bidirectional screw rod and a protection plate, and two groups of mounting vertical plates are fixedly mounted at the top of the test platform. According to the horizontal loading device for the bending fatigue test of the simply supported beam, the two groups of placing tables can be transversely moved, so that in the process of detecting simply supported beam bodies, the distance between the two groups of placing tables can be adjusted, the simply supported beam bodies with different lengths can be detected, the application range of the device is widened, and the practicability of the device is improved; when a simply supported beam body of a concrete type is detected, the two groups of protection plates are moved to the front side and the rear side of the simply supported beam body, so that the situation that the simply supported beam body is stressed to cause splashing of concrete fragments can be avoided, the cleanliness of a detection environment can be ensured, and the detection efficiency is improved. And meanwhile, the situation that detection personnel are injured by splashed concrete fragments can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge construction, and particularly relates to a horizontal loading device for a simply supported beam bending fatigue test. Background Art

[0002] A horizontal loading device for a simply supported beam bending fatigue testing machine in Chinese patent document CN218098685U makes the loading force perpendicular to the gravity of the main shaft system, eliminates the influence of the gravity of the main shaft system on the loading force and test results, overcomes the disadvantages of the original vertical loading system, and makes the test results more accurate and reliable.

[0003] The above-mentioned horizontal loading device for a simply supported beam bending fatigue testing machine lacks a protection component when detecting a simply supported beam. When the simply supported beam is a concrete structure, the pressure generated during detection may cause damage to the simply supported beam, resulting in the situation of concrete fragments flying. The flying concrete fragments will not only affect the detection environment, but may also cause harm to the detection personnel. Content of the Utility Model

[0004] The purpose of the utility model is to provide a horizontal loading device for a simply supported beam bending fatigue test, which can solve the problem that when the simply supported beam is a concrete structure, the pressure generated during detection may cause damage to the simply supported beam and lead to the flying of concrete fragments.

[0005] To achieve the above purpose, the utility model provides the following technical scheme: A horizontal loading device for a simply supported beam bending fatigue test includes a test platform, a bidirectional screw rod and a protection plate. Two groups of installation vertical plates are fixedly installed on the top of the test platform. An installation cross plate is fixedly installed on the adjacent side walls of the two groups of installation vertical plates. A hydraulic press is fixedly installed on the top of the installation cross plate. The free end of the hydraulic press extends below the installation cross plate and is fixedly installed with a pressure plate;

[0006] Two groups of placement platforms are arranged on the test platform, and the bidirectional screw rod is used to drive the two groups of placement platforms to move horizontally;

[0007] The number of the protection plates is two groups. There is a protection space between the two groups of protection plates, and the two groups of protection plates are arranged front and back.

[0008] Preferably, a transmission groove is opened inside the test platform. Installation blocks are fixedly installed on the inner top and inner bottom of the transmission groove. One side of the installation block and one side inner wall of the transmission groove are rotatably installed with a bidirectional screw rod. A moving block is threadedly installed on the outer wall of the bidirectional screw rod. The moving block is slidably arranged in the transmission groove. A connecting plate is fixedly installed on the top of the moving block. A support column is fixedly installed on the top of the connecting plate. The top of the support column is fixedly installed with the bottom of the placement platform. An arc-shaped block is fixedly installed on the inner bottom of the placement platform. A placement plate is placed on the top of the arc-shaped block. A simply supported beam body is placed on the top of the placement plate.

[0009] Preferably, an opening for the movable connection plate is provided at the top of the test platform.

[0010] Preferably, a groove is provided at the top of the test platform. Transverse mounting bars are fixedly installed on the inner walls on both sides of the groove. A sliding block is slidably mounted on the outer wall of the transverse mounting bar, and a protective plate is fixedly installed on the top of the sliding block.

[0011] Preferably, an observation port is provided inside one of the protective plates on the test platform, and an observation window is fixedly installed on the inner wall of the observation port.

[0012] Preferably, a driving motor is fixedly installed on one side of the test platform. The rotating shaft of the driving motor extends into the transmission groove and is fixedly installed with one end of a bidirectional lead screw.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows: For this simply supported beam bending fatigue test horizontal loading device, through the setting of the bidirectional lead screw, the two placement platforms can be horizontally moved. In this way, during the detection process of the simply supported beam body, the distance between the two placement platforms can be adjusted to detect simply supported beam bodies of different lengths, improving the applicable range of the device and increasing the practicality of the device. Through the setting of the two protective plates, when detecting a simply supported beam body of a concrete type, the two protective plates can be moved to the front and rear sides of the simply supported beam body, which can avoid the situation where the concrete fragments fly due to the force on the simply supported beam body. This can not only ensure the cleanliness of the detection environment, but also reduce the situation where the flying concrete fragments cause harm to the detection personnel. Description of the Drawings

[0014] The following further describes the present utility model in conjunction with the drawings and embodiments:

[0015] Figure 1 is a three-dimensional view of the present utility model;

[0016] Figure 2 is a cross-sectional view of the test platform of the present utility model;

[0017] Figure 3 is a three-dimensional view of the protective plate of the present utility model.

[0018] Reference numerals: 1, test platform; 2, mounting vertical plate; 3, hydraulic press; 4, pressure plate; 5, mounting block; 6, bidirectional lead screw; 7, moving block; 8, connection plate; 9, support column; 10, placement platform; 11, arc-shaped block; 12, placement plate; 13, simply supported beam body; 14, driving motor; 15, transverse mounting bar; 16, sliding block; 17, protective plate. Detailed Embodiments

[0019] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The function of the accompanying drawings is to supplement the description of the text part of the specification, enabling people to intuitively and vividly understand each technical feature and the overall technical solution of the present utility model. However, it should not be construed as a limitation on the protection scope of the present utility model.

[0020] Please refer to Figures 1-3 , the present utility model provides a technical solution: a horizontal loading device for the bending fatigue test of a simply supported beam, including a test platform 1, a bidirectional lead screw 6, and a protective plate 17. Two groups of mounting vertical plates 2 are fixedly installed on the top of the test platform 1. An installation cross plate is fixedly installed on the adjacent side walls of the two groups of mounting vertical plates 2. A hydraulic press 3 is fixedly installed on the top of the installation cross plate. The free end of the hydraulic press 3 extends below the installation cross plate and is fixedly installed with a pressure plate 4; two groups of placement platforms 10 are provided on the test platform 1. The bidirectional lead screw 6 is used to drive the two groups of placement platforms 10 to move horizontally; the number of protective plates 17 is two. There is a protective space between the two groups of protective plates 17, and the two groups of protective plates 17 are arranged front and back.

[0021] Furthermore, a transmission groove is formed inside the test platform 1. Mounting blocks 5 are fixedly installed on the inner top and inner bottom of the transmission groove. One side of the mounting block 5 is rotatably installed with a bidirectional lead screw 6 on one inner wall of the transmission groove. A moving block 7 is threadedly installed on the outer wall of the bidirectional lead screw 6. The moving block 7 is slidably arranged in the transmission groove. A connecting plate 8 is fixedly installed on the top of the moving block 7. A support column 9 is fixedly installed on the top of the connecting plate 8. The top of the support column 9 is fixedly installed with the bottom of the placement platform 10. An arc-shaped block 11 is fixedly installed on the inner bottom of the placement platform 10. A placement plate 12 is placed on the top of the arc-shaped block 11. A simply supported beam body 13 is placed on the top of the placement plate 12. An opening for the connecting plate 8 to move is formed on the top of the test platform 1. Such a setting can move the two groups of placement platforms 10 horizontally. In this way, during the detection of the simply supported beam body 13, the distance between the two groups of placement platforms 10 can be adjusted to detect simply supported beam bodies 13 of different lengths, improving the applicable range of the device and increasing the practicality of the device.

[0022] Furthermore, a groove is formed at the top of the test platform 1. Installation cross bars 15 are fixedly installed on the inner walls on both sides of the groove. A sliding block 16 is slidably installed on the outer wall of the installation cross bar 15. A protection plate 17 is fixedly installed at the top of the sliding block 16. An observation port is formed inside one set of the protection plates 17 on the test platform 1. An observation window is fixedly installed on the inner wall of the observation port. A driving motor 14 is fixedly installed on one side of the test platform 1. The rotating shaft of the driving motor 14 extends into the transmission groove and is fixedly installed with one end of a bidirectional lead screw 6. This setting enables the movement of the two protection plates 17 to the front and rear sides of the simply supported beam body 13 during the detection of the simply supported beam body 13 made of concrete. This can avoid the situation where the concrete fragments fly due to the force on the simply supported beam body 13, not only ensuring the cleanliness of the detection environment, but also reducing the harm caused by the flying concrete fragments to the detection personnel.

[0023] Working principle: During use, the driving motor 14 is controlled to start according to the length of the simply supported beam body 13. The driving motor 14 starts to drive the bidirectional lead screw 6 to rotate. The bidirectional lead screw 6 rotates to drive the moving block 7 and the connecting plate 8 to move. The connecting plate 8 moves to drive the support column 9 to move, thereby enabling the movement of the placing table 10. After adjusting the distance between the two placing tables 10, the placing plate 12 is placed on the arc-shaped block 11, and then the simply supported beam body 13 is placed on the placing plate 12. Then, the hydraulic press 3 is controlled to start. The hydraulic press 3 starts to drive the pressure plate 4 to descend. The descent of the pressure plate 4 can apply pressure to the simply supported beam body 13 to conduct a horizontal loading test on the simply supported beam body 13. When the material of the simply supported beam body 13 is concrete, the detection personnel manually move the protection plate 17. The movement of the protection plate 17 drives the sliding block 16 to move on the installation cross bar 15, so that the two protection plates 17 can be moved to the front and rear sides of the simply supported beam body 13 to protect the simply supported beam body 13.

[0024] The above has described the embodiments of the present invention in detail with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those of ordinary skill in the art in the technical field, various changes can be made without departing from the gist of the present invention.

Claims

1. A horizontal loading device for the bending fatigue test of a simply supported beam, characterized in that, Including: A test platform (1), on the top of the test platform (1), two groups of mounting vertical plates (2) are fixedly installed. On the adjacent side walls of the two groups of mounting vertical plates (2), a mounting cross plate is fixedly installed. On the top of the mounting cross plate, a hydraulic press (3) is fixedly installed. The free end of the hydraulic press (3) extends below the mounting cross plate and is fixedly installed with a pressure plate (4); A bidirectional lead screw (6), there are two groups of placing tables (10) on the test platform (1), and the bidirectional lead screw (6) is used to drive the two groups of placing tables (10) to move horizontally; Two groups of protective plates (17), there is a protective space between the two groups of protective plates (17), and the two groups of protective plates (17) are arranged front and back.

2. The horizontal loading device for simply supported beam bending fatigue test according to claim 1, characterized in that: Inside the test platform (1), a transmission groove is opened. On the inner top and inner bottom of the transmission groove, mounting blocks (5) are fixedly installed. On one side of the mounting block (5) and the inner wall of one side of the transmission groove, a bidirectional lead screw (6) is rotatably installed. On the outer wall of the bidirectional lead screw (6), a moving block (7) is threadedly installed. The moving block (7) is slidably arranged in the transmission groove. On the top of the moving block (7), a connecting plate (8) is fixedly installed. On the top of the connecting plate (8), a support column (9) is fixedly installed. The top of the support column (9) is fixedly installed with the bottom of the placing table (10). On the inner bottom of the placing table (10), an arc-shaped block (11) is fixedly installed. On the top of the arc-shaped block (11), a placing plate (12) is placed. On the top of the placing plate (12), a simply supported beam body (13) is placed.

3. The horizontal loading device for simply supported beam bending fatigue test according to claim 2, wherein: On the top of the test platform (1), an opening is opened for the connecting plate (8) to move.

4. The horizontal loading device for simply supported beam bending fatigue test according to claim 3, characterized in that: On the top of the test platform (1), a groove is opened. On the inner walls of both sides of the groove, mounting cross bars (15) are fixedly installed. On the outer wall of the mounting cross bar (15), a sliding block (16) is slidably installed. On the top of the sliding block (16), a protective plate (17) is fixedly installed.

5. The horizontal loading device for simply supported beam bending fatigue test according to claim 4, characterized in that: Inside one of the protective plates (17) on the test platform (1), an observation port is opened, and an observation window is fixedly installed on the inner wall of the observation port.

6. The horizontal loading device for simply supported beam bending fatigue test according to claim 5, wherein: On one side of the test platform (1), a driving motor (14) is fixedly installed. The rotating shaft of the driving motor (14) extends into the interior of the transmission groove and is fixedly installed with one end of the bidirectional lead screw (6).

Images