CN212301160U - Adjustable-size loading device for four-point bending test of simply supported beam - Google Patents
Adjustable-size loading device for four-point bending test of simply supported beam Download PDFInfo
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- CN212301160U CN212301160U CN202021246232.2U CN202021246232U CN212301160U CN 212301160 U CN212301160 U CN 212301160U CN 202021246232 U CN202021246232 U CN 202021246232U CN 212301160 U CN212301160 U CN 212301160U
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- point bending
- bending test
- loading device
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Abstract
The utility model relates to a four-point bending test loading device of adjustable examination simple supporting beam of size, including the fixed counter-force roof beam that sets up, the counter-force roof beam is connected with loading piece, loading piece and distribution roof beam fixed connection, distribution roof beam fixedly connected with loading piece, and the loading piece below is equipped with first supporting mechanism and second supporting mechanism, and first supporting mechanism and second supporting mechanism all include the support, and the support top rotates with the backup pad to be connected, and the backup pad can pass through mounting and experiment with flexural member fixed connection, the utility model discloses a loading device experimental result is accurate.
Description
Technical Field
The utility model relates to an experimental facilities technical field, concretely relates to size debuggable simple beam four-point bending test loading device.
Background
The statements herein merely provide background related to the present disclosure and may not necessarily constitute prior art.
In the 'four-point bending' test of the simply supported beam, 2 concentrated loads are often used for replacing uniformly distributed loads, a device adopted in a structural laboratory is usually that rolling shafts are arranged at two ends below the beam, the concentrated loads are applied to the upper side of the beam through the rolling shafts and the distribution beams so as to simulate the stress state of the simply supported beam, and the inventor finds that the defect of the method is that when a jack loads the distribution beam, the distribution beam is not easy to deflect due to high rigidity of the distribution beam, and when the beam deflects, the rolling shafts are caused to slide towards the middle of the beam, so that the force application position is caused to deviate, and the result is inaccurate.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming the not enough of prior art, provide a size can debug simple beam four-point bending test loading device, can avoid application of force position to produce the deviation, the experimental result is accurate.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
in a first aspect, the embodiment of the utility model provides a four-point bending test loading device of size debugging simple beam, including the fixed counter-force roof beam that sets up, the counter-force roof beam is connected with loading piece, loading piece and distribution beam fixed connection, distribution beam fixedly connected with loading piece, and the loading piece below is equipped with first supporting mechanism and second supporting mechanism, first supporting mechanism and second supporting mechanism all include the support, the support top rotates with the backup pad to be connected, the backup pad can pass through mounting and experiment with flexural component fixed connection.
The utility model has the advantages that:
the utility model discloses a loading device, because loading piece and distribution beam fixed connection, in the loading process, the loading piece can not slide because of the flexion production of the member that bends, and the application of force position can not produce the deviation, has guaranteed the accuracy of experimental result.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.
Fig. 1 is a schematic view of the overall structure of embodiment 1 of the present invention;
fig. 2 is an assembly schematic diagram of a loading member, a distribution beam and a loading block according to embodiment 1 of the present invention;
fig. 3 is a schematic view of the sliding connection between the bracket and the bracket rail according to embodiment 1 of the present invention;
the steel beam comprises a reaction beam 1, a reaction beam 2, a steel beam connecting body 3, an upright post 3-1, a first sliding groove 4, a first locking bolt 5, a first locking nut 6, a hydraulic jack 7, a first sliding piece 8, a jack sliding rail 9, a distribution beam 9-1, a third sliding groove 9-1, a loading block 10, a second locking bolt 11, a second locking nut 12, a support 13, a first hinged plate 14, a second hinged plate 15, a rotating rod 16, a pressing plate 17, a fixing rod 18, a fourth sliding groove 19, a third locking nut 20, a second sliding piece 21, a roller 22, a support rail 23, a fifth sliding groove 23-1, a roller sliding way 24, a third locking bolt 25, a fourth locking nut 26, a bent component 27 and a support plate 28.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
For convenience of description, the words "upper", "lower", "left" and "right" in the present application, if any, merely indicate correspondence with the upper, lower, left and right directions of the drawings themselves, and do not limit the structure, but merely facilitate the description of the present invention and simplify the description, rather than indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.
As introduced in the background art, the force application position of the existing monotonous static force loading device for the flexural member is easy to deviate, so that the experimental result is inaccurate.
In a typical embodiment 1 of this application, as shown in fig. 1-3, a four-point bending test loading device of size debuggable simply supported beam, including reaction beam 1, fixed connection can be dismantled through fixing bolt with the middle part position that reaction beam both ends are connected girder steel 2 with the reaction beam, reaction beam connects the both ends of girder steel all with the vertical stand 3 sliding connection who sets up of axis to can be fixed with stand locking through first retaining member.
In this embodiment, the bottom end of the stand is fixedly connected with the foundation, the stand is provided with a first chute 3-1 with a vertically arranged axis, the first locking member adopts two first locking bolts 4 and two first locking nuts 5, the first locking bolt penetrates through the reaction beam to connect the steel beam and penetrates through the stand via the first chute, the first locking bolt penetrates through the stand and then screws the first locking nut, the first locking bolt and the first locking nut are used for locking and fixing the reaction beam to connect the steel beam with the stand, the first locking nut is loosened, the reaction beam to connect the steel beam can perform lifting motion along the axis direction of the stand, and the vertical position adjustment of the reaction beam is realized.
The counter-force roof beam is connected with loading piece, loading piece adopts hydraulic jack 6, hydraulic jack fixes on loading piece fixed plate, fixed connection can be dismantled through fixing bolt with first slider 7 to loading piece fixed plate, the slider is provided with the second spout of T type, and first slider passes through second spout and the fixed jack slide rail 8 sliding connection in counter-force roof beam bottom, can adjust the position at the horizontal direction of loading piece.
The telescopic part of the hydraulic jack is fixedly welded with the top surface of the distribution beam 9, the bottom of the distribution beam is connected with two loading blocks 10, and the loading blocks are in sliding connection with the distribution beam and can be fixedly locked with the distribution beam by utilizing second locking pieces. The hydraulic jack can apply load to the flexural member through the distributing beam and the loading block.
Specifically, the bottom of the distribution beam is provided with two third sliding grooves 9-1 arranged along the axis direction of the distribution beam, the second locking part adopts four second locking bolts 11 and four second locking nuts 12, the two second locking bolts penetrate through one end of the loading block and penetrate through the bottom of the distribution beam through the third sliding grooves, the second locking nuts are screwed, fixing of one end of the loading block and the distribution beam is completed, the other end of the loading block is fixed with the distribution beam through the other two second locking bolts and the other two second locking nuts, the second locking nuts are loosened, the loading block can move along the axis direction of the distribution beam, and then the loading position is adjusted.
In this embodiment, the cross section of the loading block is an inverted triangle structure, and the sharp corner portion is excessive by using an arc surface, so that the concentrated load is applied to the flexural member and the flexural member is prevented from being damaged.
And a first supporting mechanism and a second supporting mechanism are arranged below the loading block, have the same structure and are used for supporting and fixing two ends of the flexural member.
First supporting mechanism and second supporting mechanism all include support 13, the support adopts U type structure, including horizontal stand portion and welded fastening in the vertical stand portion at horizontal stand portion both ends, horizontal stand portion rotates with backup pad 28 to be connected.
The horizontal support part adopts a steel plate structure, and the vertical support part adopts a frame structure formed by welding steel beams.
Three first hinged plates 14 which are arranged in parallel at intervals are respectively fixed at two ends of the top surface of the horizontal support part, and second hinged plates 15 matched with the first hinged plates are arranged on the bottom surface of the support plate and can be inserted into gaps of two adjacent first hinged plates.
The first hinged plate and the second hinged plate penetrate through the rotating rod 16, the second hinged plate can rotate around the rotating rod, the rotating connection between the supporting plate and the support is achieved, and the bent component can simulate a simple support beam.
The supporting plate can be fixedly connected with the end part of the bent member through a fixing part, the fixing part comprises a pressing plate 17, the pressing plate can be placed on the upper surface of the end part of the bent member, and the supporting plate can be in contact with the lower surface of the bent member. A plurality of fixing rods 18 can penetrate through the pressing plate and the supporting plate, and the fixing plates can be locked and fixed with the pressing plate and the supporting plate through third locking pieces. The end part of the bent component can extend into the space between two adjacent fixing rods and is clamped and fixed by the two adjacent fixing rods.
The fixed rods are slidably connected with the pressing plate and the supporting plate and can be fixed through the third locking pieces, and the clamping requirements of the bent members with different sizes are met by adjusting the gap between every two adjacent fixed rods.
In this embodiment, two fourth sliding grooves 19 are formed in the pressing plate and the supporting plate, two fixing rods penetrate through each fourth sliding groove, a third locking part is a third locking nut 20, two ends of each fixing rod are in threaded connection with the third locking nut, the two third locking nuts respectively press the upper surface of the pressing plate and the lower surface of the supporting plate, the pressing plate is utilized to press the bent member on the supporting plate, and meanwhile, the two fixing rods are in close contact with two side surfaces of the bent member to clamp the bent member.
The bottom of the vertical support part of the support is fixedly welded with a second sliding part 21, the second sliding part is provided with a plurality of rollers 22, the second sliding part is connected with the support rail in a sliding mode through pulleys and roller slide ways 24 fixed on the support rail 23, the support rail is fixedly connected with a ground foundation, the second sliding part can be fixedly locked with the support rail through a fourth locking part, the fourth locking part adopts a third locking bolt 25 and a fourth locking nut 26, a fifth sliding groove 23-1 is formed in the support rail, the third locking bolt can penetrate through the support rail through the fifth sliding groove and penetrate through the second sliding part, the fourth locking nut is screwed, and the second sliding part is fixedly locked with the support rail.
The working method of the loading device for the four-point bending test of the simply supported beam with the adjustable size comprises the following steps:
the height of the reaction beam is adjusted in advance, the distance between the two loading blocks is adjusted, and the positions of the supports of the first bearing mechanism and the second bearing mechanism on the support guide rail are adjusted and locked and fixed.
The end parts of the bent member 27 (prefabricated plate) are respectively placed on the supporting plates of the first supporting mechanism and the second supporting mechanism, then the pressing plate is placed on the upper surface of the end part of the bent member, the fixing rods are installed, the third locking nut is screwed, the end parts of the bent member are clamped by two adjacent fixing rods, the fixing of the bent member is completed, and the supporting plates are hinged with the supports at the moment, so that the bent member can simulate a simply supported beam.
The hydraulic jack works, loads are applied to the flexural member through the distributing beam and the loading block, and a monotonous static force loading experiment of the simulation simply supported beam is carried out.
Because the loading block and the distribution beam are fixed through the second locking bolt and the second locking nut, the force application position cannot deviate, and the accuracy of an experimental result is ensured.
Although the present invention has been described with reference to the accompanying drawings, it is not intended to limit the scope of the present invention, and those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without inventive work are still within the scope of the present invention.
Claims (10)
1. The utility model provides a four-point bending test loading device of adjustable simple beam of size, its characterized in that, including the fixed reaction beam that sets up, the reaction beam is connected with the loading piece, loading piece and distribution beam fixed connection, distribution beam fixedly connected with loading piece, and the loading piece below is equipped with first supporting mechanism and second supporting mechanism, and first supporting mechanism and second supporting mechanism all include the support, and the support top is rotated with the backup pad and is connected, and the backup pad can be through mounting and experiment with the component fixed connection that bends.
2. The four-point bending test loading device for the simply supported beam with the adjustable size as claimed in claim 1, wherein the loading member is fixedly connected with the first sliding member through a loading member fixing plate, and the first sliding member is slidably connected with the reaction beam.
3. The loading device for the four-point bending test of the simply supported beam with the adjustable size as claimed in claim 1, wherein two ends of the reaction beam are fixedly connected with the reaction beam connecting steel beam, and two ends of the reaction beam connecting steel beam can vertically move along the upright and can be locked and fixed with the upright through the first locking member.
4. The loading device for the four-point bending test of the simply supported beam with the adjustable size as claimed in claim 1, wherein the loading block is connected with the distribution beam in a sliding mode and can move along the axial direction of the distribution beam, and the loading block can be locked and fixed with the distribution beam through the second locking piece.
5. The loading device for the four-point bending test of the simply supported beam with the adjustable size as claimed in claim 1, wherein a first hinged plate is arranged at the top of the support frame, a second hinged plate is arranged at the bottom surface of the support plate, a rotating rod penetrates through the first hinged plate and the second hinged plate, and the second hinged plate is rotatably connected with the rotating rod.
6. The loading device for the four-point bending test of the dimensionally debuggable simply supported beam as claimed in claim 1, wherein the fixing member comprises a pressing plate for placing on the upper surface of the bent member, the pressing plate and the supporting plate can pass through a plurality of fixing rods, the fixing rods can be locked and fixed with the pressing plate and the supporting plate by a third locking member, and the adjacent fixing rods can clamp the end of the bent member.
7. The loading device for the four-point bending test of the simply supported beam with the adjustable size as claimed in claim 6, wherein the fixing rod is slidably connected with the supporting plate and the pressing plate and can be locked and fixed with the supporting plate and the pressing plate through a third locking member.
8. The four-point bending test loading device for the simply supported beam with the adjustable size as claimed in claim 1, wherein the bracket is slidably connected with a fixedly arranged bracket rail and can be locked and fixed with the bracket rail through a fourth locking member.
9. The four-point bending test loading device for the simply supported beam with the adjustable size as claimed in claim 8, wherein a second sliding member is fixed at the bottom end of the support, the second sliding member is provided with rollers, and the second sliding member is slidably connected with the support rails through the rollers.
10. The four-point bending test loading device for the simply supported beam with the adjustable size as claimed in claim 1, wherein the cross section of the loading block is triangular, and the sharp corners are transited through arc surfaces.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021246232.2U CN212301160U (en) | 2020-06-30 | 2020-06-30 | Adjustable-size loading device for four-point bending test of simply supported beam |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021246232.2U CN212301160U (en) | 2020-06-30 | 2020-06-30 | Adjustable-size loading device for four-point bending test of simply supported beam |
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| CN212301160U true CN212301160U (en) | 2021-01-05 |
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| CN202021246232.2U Active CN212301160U (en) | 2020-06-30 | 2020-06-30 | Adjustable-size loading device for four-point bending test of simply supported beam |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113063660A (en) * | 2021-02-05 | 2021-07-02 | 海洋石油工程股份有限公司 | Load testing device of ocean platform slideway beam |
| CN113776958A (en) * | 2021-09-18 | 2021-12-10 | 中车株洲电力机车有限公司 | Roller type bending device for bending test |
| CN114993636A (en) * | 2022-04-20 | 2022-09-02 | 海南大学 | Adjustable fixed hinge support for mechanical property test of simply supported beam |
| CN115248112A (en) * | 2022-07-28 | 2022-10-28 | 华南理工大学 | Structure, device and method for testing flexural performance of frame beam support |
-
2020
- 2020-06-30 CN CN202021246232.2U patent/CN212301160U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113063660A (en) * | 2021-02-05 | 2021-07-02 | 海洋石油工程股份有限公司 | Load testing device of ocean platform slideway beam |
| CN113776958A (en) * | 2021-09-18 | 2021-12-10 | 中车株洲电力机车有限公司 | Roller type bending device for bending test |
| CN113776958B (en) * | 2021-09-18 | 2024-02-06 | 中车株洲电力机车有限公司 | Roller bending device for bending test |
| CN114993636A (en) * | 2022-04-20 | 2022-09-02 | 海南大学 | Adjustable fixed hinge support for mechanical property test of simply supported beam |
| CN115248112A (en) * | 2022-07-28 | 2022-10-28 | 华南理工大学 | Structure, device and method for testing flexural performance of frame beam support |
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