Connecting device of loading equipment and reaction wall

Abstract

The utility model relates to the technical field of structural tests, and discloses a connecting device for loading equipment and a reaction wall, which comprises a first connecting plate fixedly connected with an anchoring end and a liner positioned between the first connecting plate and the reaction wall, third screw holes corresponding to anchoring holes preset in the reaction wall are distributed on the edge of the first connecting plate, and the third screw holes are connected with the first connecting plate. A plurality of second screw rods penetrate through the third screw holes, the liner and anchoring holes of the reaction wall to fixedly connect the first connecting plate with the reaction wall; a plurality of second screw holes are formed in the anchoring end, first screw holes corresponding to the second screw holes are formed in the first connecting plate, and first grooves are formed in the inner side faces, facing the reaction wall, of the first screw holes; the anchoring end and the first connecting plate are fixedly connected through a plurality of first screws with the corresponding number. According to the utility model, the gap between the first connecting plate and the reaction wall is filled by the liner, so that the first connecting plate does not have obvious out-of-plane deformation under the action of horizontal force, and the risk of failure of the connecting device in the test process is low.

Description

Technical Field

[0001] The utility model relates to the technical field of structural testing, in particular to a connecting device for a loading device and a reaction wall. Background Art

[0002] As one of the most important equipment in each structural test laboratory, the reaction wall usually has large geometric dimensions, and has the advantages of high rigidity, high bearing capacity, good overall performance, and a wide range of applicable scenarios. It can provide large horizontal or vertical reaction forces. In order to ensure the effective connection between the reaction wall and the loading equipment, regularly arranged horizontal anchor holes are reserved in the reaction wall. Therefore, how to ensure the reliable connection between the loading equipment and the reaction wall is one of the key links to ensure the successful implementation of the structural model test, especially for the dynamic model test. If the connection is unreliable, the connection device itself may be damaged before the structural model.

[0003] There are two commonly used connection methods. One is to expand the anchor end of the loading device, and then directly connect it to the reaction wall with bolts or prestressed tendons. When using this connection method, the reserved hole on the anchor end is required to be aligned with the reserved anchor hole on the reaction wall, and because the surface of the reaction wall is not flat, relative sliding will occur between the anchor end and the reaction wall during the dynamic test; the second is that the loading device is indirectly connected to the reaction wall with the help of an anchor beam. Since the loading device must first be connected to the anchor beam through prestress or bolts, a space for the installation of prestressed anchors or nuts must be reserved between the middle of the anchor beam and the reaction wall. Therefore, the anchor beam will inevitably bear the bending moment caused by the loading device, causing a large deformation. Under the action of dynamic loads, the probability of failure of the connection device itself is extremely high. Frequent replacement will lead to a significant increase in the test cost, and may cause the loading device to be inconsistent before and after the connection device is replaced, affecting the test effect. Summary of the invention

[0004] In order to overcome or alleviate one or more of the above technical problems, the purpose of the utility model is to provide a connecting device between a loading device and a reaction wall, which has the advantages of tight connection, strong reliability, simple structure, reusability, convenient installation, and small space occupation. It is mainly used to form a reliable connection between the loading device and the reaction wall. The connecting device is suitable for static load tests as well as dynamic tests such as fatigue tests. It is easy to install and disassemble and can be reused many times.

[0005] The utility model provides the following technical solutions:

[0006] A device for connecting a loading device to a reaction wall, comprising a first connection plate (1) fixedly connected to an anchor end (2) and a gasket (10) located between the first connection plate (1) and the reaction wall (12); a third screw hole (11-1) corresponding to a preset anchor hole of the reaction wall (12) is arranged at a protruding portion of the edge of the first connection plate (1); a plurality of second screw rods (11) pass through the third screw hole (11-1), the gasket (10) and the anchor hole of the reaction wall (12); and the first connection plate (1) is fixedly connected to the reaction wall (12) by nuts at both ends;

[0007] The anchoring end (2) is provided with a plurality of second screw holes (6); the first connecting plate (1) is provided with a first screw hole (4) corresponding to the second screw hole (6); the first screw hole (4) is provided with a first groove (5) on the inner side surface facing the reaction wall (12); a corresponding number of first screw rods (3) pass through the second screw hole (6), the first screw hole (4) and the first groove (5); the first screw rod (3) is fixedly connected to the anchoring end (2) and the first connecting plate (1) through a second nut (7) completely embedded in the first groove (5) and a first nut (8) facing the outer side of the anchoring end (2).

[0008] According to some embodiments, a lifting lug (9) is provided at the upper end of the first connecting plate (1).

[0009] According to some embodiments, at least four second screw holes (6) are provided on the anchoring end (2), and the number of the first screw rod (3) and the number of the second screw holes (6) are equal.

[0010] According to some embodiments, the side of the first screw (3) facing the anchoring end (2) is the screw tightening side (3-1), and the side facing the reaction wall (12) is the screw thread side (3-2).

[0011] According to some embodiments, the cross-section of the screw tightening side (3-1) is polygonal.

[0012] According to some embodiments, the size of the first groove (5) corresponds to the size of the second nut (7), and the movement of the second nut (7) is restricted by the first groove (5).

[0013] According to some embodiments, the cross-sections of the first groove (5) and the second nut (7) are corresponding polygons.

[0014] According to some embodiments, the thickness of the first connecting plate (1) is greater than or equal to 10 cm.

[0015] According to some embodiments, the length and width of the anchoring end (2) are both smaller than the length and width of the first connecting plate (1).

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] After the utility model is installed on the reaction wall, the possible gap between the first connection plate and the reaction wall is completely filled with the liner, and the first connection plate will not have obvious out-of-plane deformation under the action of horizontal force, and the first connection plate itself has a large out-of-plane stiffness. Therefore, after the installation of the connection device, the support stiffness of the anchor end can be regarded as infinite, and the risk of failure of the connection device itself during the test is low. The utility model is used to solve the problem that the connection area of ​​the loading device does not match the existing hole of the reaction wall and the connection is unreliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of a reaction wall connection device provided in an embodiment of the utility model.

[0019] Figure 2 A plan view of the first connecting plate of the reaction wall connecting device provided in an embodiment of the utility model facing the anchoring end.

[0020] Figure 3 A plan view of the first connecting plate of the reaction wall connecting device provided in an embodiment of the utility model facing the liner side.

[0021] Figure 4 A schematic diagram of a first groove of a first connecting plate is provided for an embodiment of the utility model.

[0022] Figure 5 A large-scale diagram of the second nut provided in an embodiment of the utility model being embedded in the first groove.

[0023] Figure 6 A schematic diagram of a first screw provided in an embodiment of the utility model.

[0024] Figure 7 A cross-sectional view of the screw tightening side of the first screw provided in an embodiment of the utility model.

[0025] Figure 8 A cross-sectional view of the screw thread side of the first screw provided in an embodiment of the utility model.

[0026] In the figure:

[0027] The first connecting plate 1, the anchoring end 2, the first screw 3, the screw tightening side 3-1, the screw thread side 3-2, the first screw hole 4, the first groove 5, the second screw hole 6, the second nut 7, the first nut 8, the ear 9, the gasket 10, the second screw 11, the third screw hole 11-1, and the reaction wall 12. DETAILED DESCRIPTION

[0028] The present invention is described in detail below in conjunction with the embodiments and drawings, but it should be understood that the embodiments and drawings are only used to exemplify the present invention and do not constitute any limitation on the protection scope of the present invention. All reasonable changes and combinations within the scope of the utility model's purpose fall within the protection scope of the present invention.

[0029] In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "front", "rear", etc. are based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present utility model; the terms "first", "second", and "third" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance. In addition, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a communication between the two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0030] The utility model is further described below in conjunction with the accompanying drawings.

[0031] Example 1

[0032] like Figure 1 The anchoring end 2 of the loading device is connected to the existing reaction wall 12 in the test room through the first connecting plate 1 and the pad 10.

[0033] like Figures 2 to 4 The first connecting plate 1 is provided with a third screw hole 11-1, a first screw hole 4 and a first groove 5 arranged at the edge during processing and manufacturing, wherein the third screw hole 11-1 corresponds to the existing anchor hole position of the reaction wall 12, and a plurality of second screws 11 are sequentially inserted into the third screw hole 11-1 and the anchor holes of the reaction wall 12 of the liner 10 to fix the first connecting plate 1 and the reaction wall 12. The second screws 11 are used to tightly anchor the first connecting plate 1 to the reaction wall 12 and bear the interface shear force between the first connecting plate 1 and the reaction wall 12.

[0034] The center lines of the first screw hole 4 and the first groove 5 on the first connecting plate 1 coincide with each other; a plurality of second screw holes 6 are provided on the anchoring end 2; a plurality of first screw rods 3 are passed through the second screw holes 6 and the first screw holes 4 of the first connecting plate 1; the nut at the outer end of the first screw rod 3 facing the anchoring end 2 is the first nut 8, and the nut at the inner end facing the reaction wall 12 is the second nut 7, and the second nut 7 is restrictively embedded in the first groove 5 to fix the anchoring end 2 and the first connecting plate 1 in connection.

[0035] The gasket 10 is installed between the first connecting plate 1 and the reaction wall 12. The gasket 10 is selected from a rubber pad with greater rigidity, which can provide greater support rigidity for the first connecting plate 1 and can adapt to the uneven surface of the reaction wall 12, so that the contact connection area between the first connecting plate 1 and the reaction wall 12 is larger. The gasket 10 is mainly used to prevent the insufficient contact area between the first connecting plate 1 and the reaction wall 12 and the local damage of the reaction wall 12 caused by the uneven contact surface between the first connecting plate 1 and the reaction wall 12, and ensure that the reaction wall 12 can withstand greater pressure. The contact area between the first connecting plate 1 and the reaction wall 12 is large and there is no gap. The first connecting plate 1 is mainly under pressure and will not undergo obvious bending deformation, which has little effect on the connected structure.

[0036] like Figure 1 , Figure 2 and Figure 3 As shown, a plurality of lifting ears 9 are installed on the top of the first connecting plate 1, and a round hole for the wire rope to pass through is reserved on the lifting ears 9; the lifting ears 9 are installed on the first connecting plate 1, and are used to lift the first connecting plate 1 for installation.

[0037] like Figure 5 As shown, the outer edge of the hexagonal second nut 7 is only slightly smaller than the first groove 5, and the second nut 7 can be easily installed into the hexagonal first groove 5, but the second nut 7 cannot rotate in the first groove 5; the depth of the first groove 5 is slightly greater than the height of the second nut 7, ensuring that the second nut 7 can be completely placed in the first groove 5, so that the contact side of the first connecting plate and the reaction wall 12 remains flat.

[0038] like Figure 6 As shown, the first screw 3 is composed of a screw tightening side 3-1 and a screw thread side 3-2, wherein the second nut 7 and the first nut 8 are respectively installed at the inner and outer ends of the screw thread side 3-2 to fix the anchor end 2, and the screw tightening side 3-1 is used to adjust the tightness of the connection between the first screw 3 and the second nut 7 when the connection is loose;

[0039] like Figure 7 and Figure 8As shown, the screw tightening side 3-1 and the screw thread side 3-2 are hexagonal and circular respectively. If the contact area between the first screw 3 and the second nut 7 is insufficient during the dynamic test, the contact area between the first screw 3 and the second nut 7 can be adjusted by using a wrench on the screw tightening side 3-1;

[0040] For the reaction wall connection device using the above technical solution, the first screw 3 and the second nut 7 are installed on the first connecting plate 1 before testing, and then the first connecting plate 1 and the gasket 10 are installed between the reaction wall 12 through the second screw 11, and finally the anchor end 2 is anchored on the first connecting plate 1 to form a reliable connection.

[0041] The specific installation steps are as follows:

[0042] In the first step, the second nut 7 is installed into the first groove 5 of the first connecting plate 1, and the first screw rod 3 is installed into the second nut 7 through the first screw hole 4, so that the end of the first screw rod 3 slightly protrudes from the second nut 7 but does not protrude from the outer surface of the first connecting plate 1;

[0043] The second step is to install the gasket 10 on the reaction wall 12 so that the holes of the gasket 10 are aligned with the reserved holes of the reaction wall 12, and then the first connecting plate 1 is lifted to a specified height through the lifting lug 9, and the screw of the second screw rod 11 is passed through the first connecting plate 1, the gasket 10 and the reaction wall 12 in sequence, and then the nuts on both sides of the second screw rod 11 are installed and tightened by a torque wrench;

[0044] The third step is to loosen and remove the wire rope on the lifting lug 9 to complete the fixation of the first connecting plate 1 and the reaction wall 12. The weight of the first connecting plate 1 will be borne by the friction force and the second screw 11.

[0045] In the fourth step, the first screw rod 3 passing through the first screw hole 4 is inserted into the second screw hole 6 on the anchor end 2, and then the first nut 8 is tightened, thereby completing the reliable connection between the anchor end 2 and the reaction wall 12.

[0046] During the dynamic test, the loose nuts on both sides of the second screw rod 11 and the first nut 8 can be adjusted by a torque wrench, and the screw tightening side 3-1 can be rotated by a wrench to adjust the contact area between the first screw rod 3 and the second nut 7. In addition, the first connecting plate 1 is made of a thicker steel plate, and its thickness should be greater than or equal to 10 cm.

[0047] The non-main force-bearing area of ​​the first connecting plate 1 is cut off, so that the first connecting plate 1 is irregular in shape, but it helps to reduce the weight of the first connecting plate 1, and the second screw 11 is installed on the protruding part of the first connecting plate 1. The shape of the gasket 10 is the same as that of the first connecting plate 1, and the hole reserved thereon is consistent with the hole reserved on the reaction wall 12 for the second screw 11 to pass through.

[0048] The first connection plate 1 can be used multiple times, and the length and width of the plane dimensions of the anchor end 2 are both smaller than the length and width of the first connection plate 1. The anchor end 2 is connected to the first connection plate 1 through at least four first screws 3, which can reduce the amount of manufacturing materials when the anchor end 2 is directly connected to the reaction wall 12 or avoid unreliable connection formed when the anchor end 2 is directly connected to the reaction wall 12. A plurality of first screw holes 4 are provided on the first connection plate 1, and the fixedly connected anchor end 2 can be installed at different positions on the first connection plate 1 to adapt to different installation positions.

[0049] The above embodiments are only preferred implementations of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A connection device between a loading device and a reaction wall, characterized in that: It comprises a first connecting plate (1) fixedly connected to an anchoring end (2) and a gasket (10) located between the first connecting plate (1) and a reaction wall (12); a third screw hole (11-1) corresponding to a preset anchoring hole of the reaction wall (12) is arranged at a protruding portion of the edge of the first connecting plate (1); a plurality of second screw rods (11) pass through the third screw hole (11-1), the gasket (10) and the anchoring hole of the reaction wall (12); and the first connecting plate (1) is fixedly connected to the reaction wall (12) by means of nuts at both ends; The anchoring end (2) is provided with a plurality of second screw holes (6); the first connecting plate (1) is provided with a first screw hole (4) corresponding to the second screw hole (6); the first screw hole (4) is provided with a first groove (5) on the inner side surface facing the reaction wall (12); a corresponding number of first screw rods (3) pass through the second screw hole (6), the first screw hole (4) and the first groove (5); the first screw rod (3) is fixedly connected to the anchoring end (2) and the first connecting plate (1) through a second nut (7) completely embedded in the first groove (5) and a first nut (8) facing the outer side of the anchoring end (2).

2. The device for connecting the loading device and the reaction wall according to claim 1, characterized in that: A lifting lug (9) is provided at the upper end of the first connecting plate (1).

3. The device for connecting the loading device and the reaction wall according to claim 1, characterized in that: At least four second screw holes (6) are provided on the anchoring end (2), and the number of the first screw rod (3) and the number of the second screw holes (6) are equal.

4. The device for connecting a loading device to a reaction wall according to claim 1, characterized in that: The side of the first screw rod (3) facing the anchoring end (2) is the screw rod tightening side (3-1), and the side facing the reaction wall (12) is the screw rod thread side (3-2).

5. The device for connecting the loading device to the reaction wall according to claim 4, characterized in that: The cross section of the screw tightening side (3-1) is polygonal.

6. The device for connecting a loading device to a reaction wall according to claim 1, characterized in that: The size of the first groove (5) corresponds to the size of the second nut (7), and the movement of the second nut (7) is restricted by the first groove (5).

7. The device for connecting a loading device to a reaction wall according to claim 6, characterized in that: The cross sections of the first groove (5) and the second nut (7) are corresponding polygons.

8. The device for connecting a loading device to a reaction wall according to claim 1, characterized in that: The thickness of the first connecting plate (1) is greater than or equal to 10 cm.

9. The device for connecting a loading device to a reaction wall according to any one of claims 1 to 8, characterized in that: The length and width of the anchoring end (2) are both smaller than the length and width of the first connecting plate (1).

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