Adjustable support for simply supported beam mechanical test

Abstract

The application discloses an adjustable support for simply supported beam mechanical test, which comprises a base and two slide rails arranged below the base, a rotating device arranged above the base, a support seat arranged above the rotating device, the support seat comprising a horizontal plate one and two brackets arranged above the horizontal plate one, a height adjusting device arranged above the horizontal plate one, and a limiting device arranged between the top of the two brackets; the height adjusting device comprises a cylinder one arranged on the horizontal plate one, the limiting device comprises a turnover assembly and a cylinder two arranged on the turnover assembly, the piston rods of the cylinder one and the cylinder two are oppositely arranged, and the piston rod ends of the cylinder one and the cylinder two are respectively connected with a support body. The application can meet the test requirements of different types of beams and has a wide application range.

Description

Technical Field

[0001] This invention relates to the field of building structure testing equipment, specifically to an adjustable support for mechanical testing of simply supported beams. Background Technology

[0002] In structural engineering, simply supported beam mechanical performance tests are a common type of experiment conducted by universities and research institutions to study the mechanical properties of various beams. These tests often employ fixed hinged supports at both ends of the beam to simulate the connection in actual engineering projects. Loading is applied at the mid-span or other symmetrical locations of the beam. The loading system typically uses an electro-hydraulic servo loading system or similar actuators. For example, patent document CN 208889071 U discloses a loading system suitable for experimental teaching of reinforced concrete beams.

[0003] However, in actual experiments, due to the range limitation of the loading piston in the loading system, it is necessary to calculate the accurate height of the support. Due to the different beam heights and the existence of some test distribution beams, the support height is not unique. Often, a type of beam can only use a type of support of a certain height, resulting in a narrow range of applicability, wasted resources, and inconvenience to the experiment. In addition, most supports currently lack constraints in the width direction, which can easily lead to eccentric force problems. For this reason, scaffolding or other methods are usually used to provide out-of-plane constraints around the test beam. However, the erection and dismantling of scaffolding makes the test process more complicated, increases the difficulty of the experiment, and is inconvenient to operate. Summary of the Invention

[0004] To address the problems of narrow application range and inconvenient operation of fixed hinge supports currently used in mechanical performance testing of simply supported beams, this invention proposes an adjustable support for mechanical testing of simply supported beams, which is convenient to operate during debugging and has a wide range of applications.

[0005] To achieve the above objectives, the technical solution of the present invention is as follows:

[0006] An adjustable support for mechanical testing of simply supported beams includes a base and two slide rails disposed below the base. A rotating device is disposed above the base, and a support seat is disposed above the rotating device. The support seat includes a horizontal plate and brackets located on both sides above the horizontal plate. A height adjustment device is disposed above the horizontal plate, and a limiting device is disposed between the tops of the two brackets.

[0007] The height adjustment device includes a hydraulic cylinder 1 mounted on a horizontal plate 1, and the limiting device includes a flipping assembly and a hydraulic cylinder 2 mounted on the flipping assembly. The piston rods of the hydraulic cylinder 1 and the hydraulic cylinder 2 are arranged opposite to each other, and the ends of the piston rods of the hydraulic cylinder 1 and the hydraulic cylinder 2 are respectively connected to a support body.

[0008] Furthermore, the rotating device includes a ring and a turntable fitted inside the ring. The ring has a circular hole and a connecting lug on its outer circumference. A bolt passes through the connecting lug and is connected to the base.

[0009] The turntable is fixed below the horizontal plate. The horizontal plate has a second circular hole. A bolt is inserted into both the first and second circular holes. The bolt facilitates fixing after rotation.

[0010] Furthermore, the flipping assembly includes a rotating shaft, a second horizontal plate, and square tubes located at both ends of the second horizontal plate. The two rotating shafts are a group and symmetrically distributed on the support. Each of the square tubes has a side plate. One side plate has a sleeve at one end and a baffle at one end. The sleeve is fitted onto one of the rotating shafts. A groove is formed on the baffle, which can be engaged with the other rotating shaft to realize the opening and closing of the limiting device.

[0011] Furthermore, a bolt three is fixedly installed above each of the square tubes. The bolt three passes through the horizontal plate two and is locked with a nut, which facilitates the adjustment of the height of the horizontal plate two.

[0012] Furthermore, a threaded hole is provided at the top of the bracket, and a through hole is provided on the side plate. Four bolts are inserted into both the through hole and the corresponding threaded hole.

[0013] Furthermore, one end of the cylinder body of the first cylinder is fixed to the first horizontal plate, and one end of the cylinder body of the second cylinder is fixed to the second horizontal plate. Both the piston rods of the first and second cylinders have scale lines for easy observation and adjustment.

[0014] Furthermore, the base has a sliding groove at its bottom, the slide rail is located in the corresponding sliding groove, the base has a through hole two, the slide rail has a threaded hole two, and a bolt five is inserted into the corresponding through hole two and threaded hole two.

[0015] Furthermore, rollers are provided between the ring and the turntable to reduce friction during rotation.

[0016] Furthermore, the support body and the piston rod of the hydraulic cylinder are connected by a magnet. Each hydraulic cylinder has a notch on its piston rod, and the support body is located in the corresponding notch, making it convenient to replace different supports.

[0017] The beneficial effects of the present invention through the above technical solution are as follows:

[0018] 1. This invention enables the horizontal movement of the entire support via a slide rail, facilitating adjustment of the support position according to the different lengths of the test beam. Furthermore, the support can be rotated via a rotating device. Since a simply supported beam requires two supports, various types of mechanical tests can be conducted by changing the direction of the slide rail and rotating the device, making it widely applicable.

[0019] 2. The height of the support can be adjusted by setting a height adjustment device. When the test height required by the test beam is met, the cylinder has a scale line for easy observation and adjustment. In addition, the support body is magnetically embedded in the corresponding cylinder piston rod notch. On the one hand, the appropriate support type can be selected according to the test requirements. On the other hand, it is more convenient to replace the support that is worn after multiple tests, so it is replaceable.

[0020] 3. The limiting device can be rotated through a pivot on one side, so the beam can be placed either horizontally through the middle of the support or by being hoisted from top to bottom. It can be placed according to parameters such as the shape and type of the beam, making it convenient to use.

[0021] 4. The horizontal plate II moves up and down on the bolts III on both sides of the limiting device via nuts, which can effectively increase the limit height of the limiting device and facilitate the constraint of the width direction of larger and smaller test beams. At the same time, the hydraulic cylinder II on the limiting device also makes the control of the constraint distance more precise.

[0022] 5. In this invention, the support is positioned by bolts after sliding and rotating, and the limiting device is connected to the bracket by bolts, which makes operation convenient. Attached Figure Description

[0023] Figure 1 This is a three-dimensional schematic diagram of an adjustable support for mechanical testing of a simply supported beam according to an embodiment of the present invention, in which the limiting device is in a closed state.

[0024] Figure 2 This is a front view of an adjustable support for mechanical testing of a simply supported beam, according to Embodiment 1 of the present invention.

[0025] Figure 3 This is a schematic diagram of the explosion state of the rotating device in Embodiment 1 of the present invention.

[0026] Figure 4 This is a schematic diagram of the limiting device in Embodiment 1 of the present invention, in which the limiting device is in the open state.

[0027] Figure 5 This is a schematic diagram illustrating the application state of an adjustable support for mechanical testing of a simply supported beam, according to Embodiment 1 of the present invention.

[0028] Figure 6This is a schematic diagram of the support body in Embodiment 1 of the present invention.

[0029] Figure 7 This is a schematic diagram of the support body in Embodiment 2 of the present invention.

[0030] Figure 8 This is a schematic diagram of the support body in Embodiment 3 of the present invention.

[0031] The numbers in the attached diagram are:

[0032] 1 is the base, 2 is the slide rail, 3 is the first horizontal plate, 4 is the bracket, 5 is the first hydraulic cylinder, 6 is the second hydraulic cylinder, 7 is the support body, 8 is the ring, 9 is the turntable, 10 is the first round hole, 11 is the connecting lug, 12 is the first bolt, 13 is the second round hole, 14 is the second bolt, 15 is the rotating shaft, 16 is the second horizontal plate, 17 is the square tube, 18 is the side plate, 19 is the sleeve, 20 is the baffle, 21 is the third bolt, 22 is the nut, 23 is the first threaded hole, 24 is the fourth bolt, 25 is the second through hole, 26 is the second threaded hole, 27 is the fifth bolt, 28 is the roller, and 29 is the test beam. Detailed Implementation

[0033] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0034] In the description of this invention, it should be understood that the terms "left," "right," "up," "down," "horizontal," and "vertical," etc., indicate the orientation or positional relationship based on the appendix. Figure 1 The orientations or positional relationships shown are for the purpose of facilitating and simplifying the description of the present invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

[0035] Example 1

[0036] like Figures 1-5 As shown, an adjustable support for mechanical testing of simply supported beams includes a base 1 and two slide rails 2 disposed below the base 1. A rotating device is disposed above the base 1, and a support seat is disposed above the rotating device. The support seat includes a horizontal plate 3 and brackets 4 located on both sides above the horizontal plate 3. A height adjustment device is disposed above the horizontal plate 3, and a limiting device is disposed between the tops of the two brackets 4.

[0037] Specifically, the height adjustment device includes a hydraulic cylinder 5 mounted on the horizontal plate 3, and the limiting device includes a flipping assembly and a hydraulic cylinder 6 mounted on the flipping assembly. The piston rods of the hydraulic cylinder 5 and the hydraulic cylinder 6 are arranged opposite to each other, and the ends of the piston rods of the hydraulic cylinder 5 and the hydraulic cylinder 6 are respectively connected to a support body 7.

[0038] Please refer to it again. Figure 3The rotating device includes a ring 8 and a turntable 9 fitted inside the ring 8. The ring 8 has a circular hole 10 and a connecting lug 11 on its outer circumference. A bolt 12 passes through the connecting lug 11 and connects it to the base 1. Specifically, the turntable 9 is fixed below a horizontal plate 3. The horizontal plate 3 has a circular hole 13. A bolt 14 passes through both the circular hole 10 and the circular hole 13. The bolt 14 facilitates fixation after rotation. In addition, a roller 28 is provided between the ring 8 and the turntable 9 to reduce friction during rotation.

[0039] Please refer to it again. Figure 1 and Figure 4 The flipping assembly includes a rotating shaft 15, a horizontal plate 16, and square tubes 17 located at both ends of the horizontal plate 16. The two rotating shafts 15 are a group and symmetrically distributed on the bracket 4. Each side of the square tube 17 is provided with a side plate 18. One side plate 18 is provided with a sleeve 19 at one end and a baffle 20 at one end. The sleeve 19 is sleeved on one of the rotating shafts 15. A groove is provided on the baffle 20, which can be locked onto the other rotating shaft 15 to realize the opening and closing of the limiting device.

[0040] Furthermore, a bolt 21 is fixedly installed above each of the square tubes 17. The bolt 21 passes through the horizontal plate 16 and is locked by a nut 22, which facilitates the adjustment of the height of the horizontal plate 16.

[0041] In this embodiment, the top of the bracket 4 is provided with a threaded hole 23, and the side plate 18 is provided with a through hole. The through hole and the corresponding threaded hole 23 are both provided with bolts 24.

[0042] In this embodiment, one end of the cylinder body of the first cylinder 5 is fixed on the first horizontal plate 3, and one end of the cylinder body of the second cylinder 6 is fixed on the second horizontal plate 16. Both the piston rods of the first cylinder 5 and the second cylinder 6 have scale lines for easy observation and adjustment.

[0043] In this embodiment, the bottom of the base 1 is provided with a sliding groove, the slide rail 2 is located in the corresponding sliding groove, the base 1 is provided with a through hole 25, the slide rail 2 is provided with a threaded hole 26, and the corresponding through hole 25 and threaded hole 26 are provided with a bolt 27.

[0044] It should be noted that the support body 7 and the piston rod of the hydraulic cylinder are connected by a magnet. Each hydraulic cylinder's piston rod has a notch, and the support body 7 is located within the corresponding notch, facilitating the replacement of different supports; for example... Figure 6 As shown, in this embodiment, the support body 7 is a hinged support.

[0045] Since mechanical testing of a simply supported beam requires two supports, and the adjustments to both supports must be consistent, this example uses one support; the other support will not be detailed. The specific steps include:

[0046] Step 1: Slide base 1 on slide rail 2 to move base 1 to the test target position, then bolt 27 passes through through hole 25 and threaded hole 26 to complete the fixation; if the support needs to be rotated, remove bolt 14, the support can be rotated, and after the rotation is completed, reinstall bolt 14 to complete the fixation.

[0047] Step 2: Pull out the bolt 24 on one side of the baffle 20. The sleeve 19 in the limiting device can rotate around the corresponding rotating shaft 15 and rotate more than 90°. At this time, the limiting device is in the open state, so that the test beam 29 can be easily placed in the middle position of the two brackets 4 on the support base.

[0048] Step 3: Adjust the height using the rocker arm on the hydraulic cylinder 5. Stop adjusting once the scale line reaches the target height. Select a support body 7 that meets the test requirements and install it at the notch of the hydraulic cylinder in the limiting device and the height adjustment device, respectively.

[0049] Step 4: Place the beam using a crane or forklift.

[0050] Step 5: Rotate the limiting device to the closed state. At this time, the baffle 20 is in contact with the corresponding rotating shaft 15. Then fix it with bolt 4 24. Then adjust the position of the horizontal plate 2 16 by nut 22. When the top of the support body 7 of the oil cylinder 2 6 in the limiting device is close to the upper surface of the test beam 29, tighten bolt 3 21.

[0051] Finally, the height is adjusted by the remote lever on the hydraulic cylinder 6 itself, so that the top of the support body 7 in the limiting device is close to the upper surface of the test beam 29, thereby constraining the beam end and enabling the simple supported beam mechanical experiment to be carried out.

[0052] Example 2

[0053] This embodiment is basically the same as Embodiment 1, and the similarities will not be repeated. The differences are as follows:

[0054] like Figure 7 As shown, in this embodiment, the support body 7 is a roller support.

[0055] Example 3

[0056] This embodiment is basically the same as Embodiment 1, and the similarities will not be repeated. The differences are as follows:

[0057] like Figure 8 As shown, in this embodiment, the support body 7 is a conical support.

[0058] In summary, the present invention allows for the selection of suitable support types based on experimental requirements, and has a wide range of applications.

[0059] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the claims of the present invention should be included within the scope of the present invention.

Claims

1. An adjustable support for mechanical testing of simply supported beams, comprising a base (1) and two slide rails (2) disposed below the base (1), characterized in that, A rotating device is provided above the base (1), and a support seat is provided above the rotating device. The support seat includes a horizontal plate (3) and brackets (4) located on both sides above the horizontal plate (3). A height adjustment device is provided above the horizontal plate (3), and a limiting device is provided between the tops of the two brackets (4). The height adjustment device includes a hydraulic cylinder 1 (5) mounted on a horizontal plate 1 (3). The limiting device includes a flipping assembly and a hydraulic cylinder 2 (6) mounted on the flipping assembly. The piston rods of the hydraulic cylinder 1 (5) and the hydraulic cylinder 2 (6) are arranged opposite to each other. The piston rod ends of the hydraulic cylinder 1 (5) and the hydraulic cylinder 2 (6) are respectively connected to a support body (7). The support body (7) and the piston rod of the hydraulic cylinder are connected by a magnet. Each hydraulic cylinder has a notch on its piston rod, and the support body (7) is located in the corresponding notch.

2. The adjustable support for mechanical testing of simply supported beams according to claim 1, characterized in that, The rotating device includes a ring (8) and a turntable (9) fitted inside the ring (8). A circular hole (10) is provided on the ring (8). A connecting ear (11) is provided on the outer circumference of the ring (8). A bolt (12) is inserted through the connecting ear (11) and connected to the base (1). The turntable (9) is fixed below the horizontal plate (3). The horizontal plate (3) has a second round hole (13), and a bolt (14) is inserted into the corresponding first round hole (10) and second round hole (13).

3. An adjustable support for mechanical testing of simply supported beams according to claim 1, characterized in that, The flipping assembly includes a rotating shaft (15), a second horizontal plate (16), and square tubes (17) located at both ends of the second horizontal plate (16). The two rotating shafts (15) are a group and symmetrically distributed on the support (4). Each side of the square tube (17) is provided with a side plate (18). One side plate (18) is provided with a sleeve (19) at one end and a baffle (20) at one end of the other side plate (18). The sleeve (19) is sleeved on one of the rotating shafts (15), and a groove is provided on the baffle (20).

4. An adjustable support for mechanical testing of simply supported beams according to claim 3, characterized in that, Each of the square tubes (17) is fixedly provided with a bolt three (21) above it. The bolt three (21) passes through the horizontal plate two (16) and is locked by a nut (22).

5. An adjustable support for mechanical testing of simply supported beams according to claim 3, characterized in that, The bracket (4) has a threaded hole (23) at the top and a through hole (18) on the side plate (18). The through hole and the corresponding threaded hole (23) are fitted with bolts (24).

6. An adjustable support for mechanical testing of simply supported beams according to claim 3, characterized in that, One end of the cylinder body of the first cylinder (5) is fixed on the first horizontal plate (3), and one end of the cylinder body of the second cylinder (6) is fixed on the second horizontal plate (16). Both the piston rods of the first cylinder (5) and the second cylinder (6) have scale lines.

7. An adjustable support for mechanical testing of simply supported beams according to claim 1, characterized in that, The base (1) has a sliding groove at the bottom, and the slide rail (2) is located in the corresponding sliding groove. The base (1) has a through hole (25), and the slide rail (2) has a threaded hole (26). The corresponding through hole (25) and threaded hole (26) are fitted with bolts (27).

8. An adjustable support for mechanical testing of simply supported beams according to claim 2, characterized in that, A roller (28) is provided between the ring (8) and the turntable (9).

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