Stress measuring device

Abstract

The utility model discloses a stress measuring device in the field of stress measurement, which comprises a mounting seat plate I, a mounting seat plate II and a fixed supporting bent plate fixed on one side of the mounting seat plate I. One side of the mounting seat plate I is fixedly connected with two clamping fixtures, one side of each clamping fixture is provided with a strain gauge, the number of the clamping fixtures is two, and the strain gauge is arranged on the other side of each clamping fixture. And the other clamping fixture is arranged at the other end of the strain gauge. When the stress measuring device is used for measuring stress and the first mounting seat plate and the second mounting seat plate move relatively, one end of the strain gauge can be pulled to move upwards through the stay wire under the guidance of the supporting rollers, tensile strain of the strain gauge is converted into radial inclined strain, and due to the fact that the radial strain capacity is far larger than the axial strain capacity, the strain gauge can be changed into radial inclined strain. Therefore, amplification of a corresponding variable measurement result can be realized, the measurement accuracy can be greatly improved, and after the arrangement, the overall width increase of the strain gauge can be neglected, and packaging and transportation are facilitated.

Description

TECHNICAL FIELD

[0001] The utility model relates to stress measurement field, concretely is a kind of stress measurement device. BACKGROUND

[0002] In engineering construction, especially in bridge construction, the strain of the bridge needs to be measured in real time to ensure the safety of construction. The existing measurement method directly bonds strain gauges on the bridge and measures directly through the strain gauges. Since the strain gauges stretch during measurement, the deformation is small, resulting in low measurement accuracy. For vertical deformation measurement mechanisms, the overall height is high, occupying a large space, which is not conducive to packaging and transportation.

[0003] Therefore, the skilled person in the art provides a stress measurement device to solve the problems raised in the above background. SUMMARY

[0004] The utility model aims at providing a kind of stress measurement device to solve the problems raised in the above background.

[0005] To achieve the above object, the utility model provides the following technical scheme:

[0006] A stress measurement device includes a mounting seat plate one, a mounting seat plate two and a fixed support bent plate fixed on one side of the mounting seat plate one. The mounting seat plate one side is fixedly connected with a clamping fixture. The clamping fixture side is provided with a strain gauge. The clamping fixture has two, and the other clamping fixture is arranged at the other end of the strain gauge. The fixed support bent plate top is provided with a support roller. The support roller center part is rotatably connected with a roller shaft through a bearing. The roller shaft is installed on the fixed support bent plate. The mounting seat plate two top is fixedly connected with a traction bent plate. The traction bent plate side and the clamping fixture side of the strain gauge side are fixedly connected with a pull line wound on the support roller.

[0007] As a further scheme of the utility model: the clamping fixture includes a pressing groove and a spring deformation groove opened on the one side wall of the clamping fixture, a spring deformation pressing plate integrally formed between the pressing groove and the spring deformation groove, and a pressing screw hole opened on the clamping fixture on the side of the spring deformation groove.

[0008] As a further scheme of the utility model: the pressing screw hole is threadedly connected with a pressing screw inside. The thickness of the strain gauge is the same as the width of the pressing groove, and the strain gauge is pressed in the pressing groove by the pressing screw.

[0009] As a further scheme of the utility model: a fixing hole is opened on the periphery of the roller shaft on the fixed support bent plate, and the roller shaft is installed in the fixing hole with interference.

[0010] As a further scheme of the utility model: the mounting hole for being fixedly connected with external measured member is arranged on the mounting seat plate one and the mounting seat plate two.

[0011] As a further scheme of the utility model: the wheel groove for providing the limit for the pull wire is arranged on the outer circular surface of the supporting roller.

[0012] As a further scheme of the utility model: the pull wire is rigid pull wire.

[0013] Compared with the prior art, the utility model has the beneficial effects that:

[0014] The utility model can realize the amplification to the strain measurement result when the mounting seat plate one and the mounting seat plate two move oppositely under the guidance of the supporting roller and the one end of the strain gauge is pulled upward by the pull wire, the tensile strain of the strain gauge is converted into the radial inclination strain, the radial strain amount is far greater than the axial strain amount, the measurement accuracy can be greatly improved, and the overall width of the strain gauge can be ignored after being arranged, so that the packaging and transportation are facilitated. BRIEF DESCRIPTION OF DRAWINGS

[0015] Fig. 1 It is the structural schematic diagram of the utility model;

[0016] Fig. 2 It is the connection structure diagram of the mounting seat plate one, the fixed supporting bent plate and the clamping fixture in the utility model;

[0017] Fig. 3 It is the structure diagram of the clamping fixture in the utility model;

[0018] Fig. 4 It is the right view of the supporting roller in the utility model.

[0019] In the drawing: 1, mounting seat plate one;2, mounting seat plate two;3, traction bent plate;4, clamping fixture;401, compression screw hole;402, press groove;403, elastic deformation groove;404, elastic deformation pressing plate;5, compression screw;6, strain gauge;7, fixed supporting bent plate;701, fixed hole;8, supporting roller;801, wheel groove;9, roller shaft;10, pull wire. DETAILED DESCRIPTION

[0020] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described, obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0021] Please refer to Figs. 1-4 In the embodiments of the present application, a stress measuring device comprises a mounting seat plate one 1, a mounting seat plate two 2 and a fixed support bent plate 7 fixed on one side of the mounting seat plate one 1, the mounting seat plate one 1 is fixedly connected with clamping jigs 4 on one side, the clamping jigs 4 are provided with strain gauges 6 on one side, the clamping jigs 4 have two, the other clamping jig 4 is arranged at the other end of the strain gauge 6, the fixed support bent plate 7 is provided with support rollers 8 on the top, the support rollers 8 are rotatably connected with rolling shafts 9 at the central parts through bearings, the rolling shafts 9 are installed on the fixed support bent plate 7, the mounting seat plate two 2 is fixedly connected with a traction bent plate 3 on the top, the traction bent plate 3 is fixedly connected with a pull line 10 wound on the support rollers 8 between the clamping jigs 4 on one side of the strain gauge 6 and the other side.

[0022] By adopting the above technical scheme, when the mounting seat plate one 1 and the mounting seat plate two 2 move relative to each other during the stress measurement of the stress measuring device, one end of the strain gauge 6 can be pulled upward by the pull line 10 under the guidance of the support rollers 8, the tensile strain of the strain gauge 6 is converted into a radial inclined strain, since the radial strain is much larger than the axial strain, the measurement result of the strain can be amplified, the measurement accuracy can be greatly improved, and the overall width of the strain gauge 6 can be increased, which is negligible, facilitating packaging and transportation.

[0023] The clamping jig 4 comprises a pressing groove 402 and a spring deformation groove 403 opened on the side wall of the clamping jig 4, a spring deformation pressing plate 404 integrally formed between the pressing groove 402 and the spring deformation groove 403, and a pressing screw hole 401 opened on the clamping jig 4 on the side of the spring deformation groove 403, the pressing screw hole 401 is internally threadedly connected with a pressing screw 5, the thickness of the strain gauge 6 is the same as the width of the pressing groove 402, and the strain gauge 6 is pressed in the pressing groove 402 by the pressing screw 5.

[0024] By adopting the above technical scheme, the strain gauge 6 can be quickly fixed and connected, and then the installation and replacement operation of the strain gauge 6 is facilitated.

[0025] The fixed support bent plate 7 is provided with a fixed hole 701 around the rolling shaft 9, the rolling shaft 9 is installed in the fixed hole 701 in an interference fit, and the mounting seat plate one 1 and the mounting seat plate two 2 are both provided with mounting holes for fixedly connecting with external measured members.

[0026] The outer circular surface of the supporting roller 8 is provided with a wheel groove 801 for limiting the pull wire 10, so that the pull wire 10 can be prevented from being off track.

[0027] In the embodiment, the pull wire 10 is a rigid pull wire, so that the measurement accuracy can be ensured.

[0028] The above merely describes a preferred embodiment of the present application, but the protection scope of the present application is not limited to this. Any skilled person in the art can make equivalent substitutions or changes according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A stress measuring device comprising a mounting plate one (1), a mounting plate two (2) and a fixed support curved plate (7) fixed to one side of said mounting plate one (1), characterized in that: One side of the mounting seat plate (1) is fixedly connected with clamping clamps (4), one side of the clamping clamp (4) is provided with a strain gauge (6), the clamping clamp (4) has two, the other clamping clamp (4) is arranged at the other end of the strain gauge (6), the top of the fixed support bent plate (7) is provided with a supporting roller (8), the supporting roller (8) is rotatably connected with a roller shaft (9) at the center position through a bearing, the roller shaft (9) is installed on the fixed support bent plate (7), the top of the mounting seat plate (2) is fixedly connected with a traction bent plate (3), the traction bent plate (3) is fixedly connected with a pull line (10) wound on the supporting roller (8) between one side of the traction bent plate (3) and the clamping clamp (4) on one side of the strain gauge (6).

2. A stress measuring device according to claim 1, characterised in that: The clamping clamp (4) comprises a pressing groove (402) and a elastic deformation groove (403) opened on one side wall of the clamping clamp (4), an elastic deformation pressing plate (404) integrally formed between the pressing groove (402) and the elastic deformation groove (403), and a pressing screw hole (401) opened on the clamping clamp (4) on one side of the elastic deformation groove (403).

3. A stress measuring device according to claim 2, characterised in that: The inside of the pressing screw hole (401) is threadedly connected with a pressing screw (5), the thickness of the strain gauge (6) is the same as the width of the pressing groove (402), and the strain gauge (6) is pressed in the pressing groove (402) by the pressing screw (5).

4. A stress measuring device according to claim 1, characterized in that: The fixed support bent plate (7) is provided with a fixed hole (701) around the roller shaft (9), and the roller shaft (9) is installed in the fixed hole (701) in interference.

5. The stress measurement device of claim 1, wherein: The outer circular surface of the supporting roller (8) is provided with a wheel groove (801) for limiting the pull line (10). The outer circular surface of the supporting roller (8) is provided with a wheel groove (801) for limiting the pull line (10).

Images