Bridge structure stress detection device

Abstract

The utility model relates to the technical field of bridge detection, and discloses a bridge structure stress detection device, which comprises two groups of mounting substrates respectively mounted at points to be detected, reference columns are fixedly mounted on the mounting substrates, and steering sleeves capable of rotating and axially moving around the reference columns are sleeved on the outer wall surfaces of the reference columns. The outer wall face of the steering sleeve is in threaded connection with a fastener, the fastener is in interference fit with the reference column after being tightened, the other end of the steering sleeve is detachably provided with connecting rods, and a set of stress meters is fixedly installed between the two sets of connecting rods. According to the utility model, the positions of the two groups of steering sleeves on the connecting rod are adjusted, the inclination angles of the steering sleeves are determined, then the steering sleeves on the reference column are fixed, and the depth of the steering sleeves sleeved on the reference column is fixed, so that the initial stress value of the stressometer is not influenced under the condition that the installation of the installation substrate is deviated.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge detection, in particular to a bridge structure stress detection device. Background Art

[0002] Bridges are an important part of transportation, and their safety is of paramount importance. Therefore, it is necessary to regularly detect stress changes in bridge structures.

[0003] The current stress detection method is to install two measuring substrates on the two points to be measured on the bridge, then fix two sets of connecting rods to the two ends of the strain gauge, and then fix the two sets of connecting rods to the two measuring substrates respectively. When the stress generated by external force at the point to be measured on the bridge is deformed, it affects the relative position of the two sets of connecting rods, and then is detected by the strain gauge connected between the two sets of connecting rods.

[0004] However, once a position error occurs during the installation of the base plate, such as an inclination error, height error, depth error, etc., it is easy to cause the connecting rod to be misaligned, which in turn makes the initial stress of the strain gauge larger. Subsequent measurements can only be performed based on the erroneous initial stress. However, if the initial stress is not zero, it will affect the subsequent stress measurement range. If the stress beyond the measurement range cannot be detected in time, it will pose a safety hazard.

[0005] To this end, we propose a bridge structure stress detection device. Utility Model Content

[0006] The utility model mainly solves the technical problems existing in the above-mentioned prior art and provides a bridge structure stress detection device.

[0007] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a bridge structure stress detection device, comprising two groups of mounting base plates respectively installed at the points to be measured, a reference column fixedly installed on the mounting base plate, a steering sleeve that can rotate around the reference column and move axially is sleeved on the outer wall of the reference column, a fastener is threadedly connected to the outer wall of the steering sleeve, and the fastener is interference fit with the reference column after being tightened, the other end of the steering sleeve is detachably installed with a connecting rod, and a group of stress gauges is fixedly installed between the two groups of connecting rods.

[0008] Preferably, it also includes an adapter tube, the reference column includes a column body, the column body is axially and vertically installed on the mounting base plate, four groups of limit grooves are evenly opened axially on the side of the reference column, the adapter tube includes a hollow cylinder body, the cylinder body is sleeved on the outside of the column body, and the inner wall of the cylinder body is integrally formed with a limit block corresponding to the position of the limit groove, and the limit block can slide in the limit groove.

[0009] Preferably, the outer wall of the cylinder body is integrally formed with a protrusion outward near the steering sleeve to form a rotating ring, and a rotating groove for accommodating the rotating ring is provided inside the steering sleeve. The rotating ring is sleeved in the rotating groove and the steering sleeve can rotate around the cylinder body.

[0010] Preferably, the outer wall surface of the cylinder body is integrally formed near the mounting base plate to protrude outward to form a second protruding ring, and the steering sleeve is integrally formed near the adapter cylinder to protrude outward to form a first protruding ring, and two sets of second screws are symmetrically threaded on the first protruding ring, and the second screws are interference fit with the second protruding ring after tightening.

[0011] Preferably, the side wall surface of the second convex ring is evenly threadedly connected with multiple groups of first screws, and the first screws are interference fit with the column body.

[0012] Preferably, the second convex ring is provided with an installation groove at a position corresponding to the first convex ring, an anti-slip ring is bonded in the installation groove, and a second anti-slip head is installed at one end of the second screw close to the second convex ring. Both the second anti-slip head and the anti-slip ring are made of rubber and are provided with anti-slip pads.

[0013] Preferably, a first anti-slip pad is fixedly installed on the bottom of the limiting groove, and the first anti-slip pad is made of rubber. The end of the first screw is also fixedly installed with a first anti-slip head. Both the first anti-slip pad and the first anti-slip head are made of rubber and are provided with an anti-slip pad.

[0014] Preferably, the outer wall surface of the reference column is further sleeved with an anti-slip sleeve, which is made of rubber and has anti-slip grooves on its surface.

[0015] Beneficial effects

[0016] The utility model provides a bridge structure stress detection device, which has the following beneficial effects:

[0017] First, install the two sets of mounting base plates at the position of the test point, then fix the two sets of connecting rods to the two ends of the strain gauge, then adjust the positions of the two sets of steering sleeves on the connecting rods so that the steering sleeves can be sleeved on the reference column. At this time, the inclination angle of the steering sleeve has been determined, then fix the steering sleeve on one side of the reference column, and then adjust the position of the steering sleeve on the other side until the initial measurement value of the strain gauge is 0, and then fix the steering sleeve on the other side on the reference column on the other side. At this time, the depth of the steering sleeve sleeve on the reference column is fixed, so that even if there is a deviation in the installation of the mounting base plate, it will not affect the initial stress value of the strain gauge. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are only exemplary, and those skilled in the art can derive other implementation drawings based on the provided drawings without inventive effort.

[0019] The structures, proportions, sizes, etc. illustrated in this specification are intended solely to complement the contents disclosed herein and to facilitate understanding and reading by persons familiar with the art. They are not intended to limit the conditions under which the present invention may be implemented and therefore have no substantive technical significance. Any structural modifications, changes in proportions, or adjustments in size, without affecting the efficacy and objectives of the present invention, shall remain within the scope of the technical contents disclosed herein.

[0020] Figure 1 This is a structural diagram of the first embodiment of the present utility model;

[0021] Figure 2 This is a structural diagram of the second embodiment of the present utility model;

[0022] Figure 3 This is a structural breakdown diagram of Example 2 of the present utility model.

[0023] Legend:

[0024] 1. Install the substrate;

[0025] 2. Reference column; 21. Column body; 22. Limiting groove; 23. First anti-slip pad;

[0026] 3. Steering sleeve; 31. First protruding ring; 32. Rotation groove;

[0027] 4. Fastener; 41. First screw; 42. First anti-slip head; 43. Second screw; 44. Second anti-slip head;

[0028] 5. Connecting rod;

[0029] 6. Strain gauge;

[0030] 7. Adapter tube; 71. Tube body; 72. Stop block; 73. Second convex ring; 74. Rotating ring; 75. Mounting groove; 76. Anti-slip ring;

[0031] 8. Anti-slip cover. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0033] Example 1

[0034] A bridge structure stress detection device, such as Figure 1 As shown, it includes two groups of mounting bases 1 respectively installed at the points to be measured, a reference column 2 perpendicular to the mounting base 1 is fixedly installed on the mounting base 1, and a steering sleeve 3 that can rotate and move axially around the reference column 2 is sleeved on the outer wall of the reference column 2, and a fastener 4 is threadedly connected to the outer wall of the steering sleeve 3, and the fastener 4 is radially and vertically arranged on the side wall of the steering sleeve 3. By rotating the fastener 4, the fastener 4 and the reference column 2 are interference fit, so that the steering sleeve 3 and the reference column 2 are relatively fixed, and a connecting rod 5 is detachably installed on the other end of the steering sleeve 3, and a group of strain gauges 6 is fixedly installed between the two groups of connecting rods 5. When the two groups of mounting bases 1 are installed, by synchronously sleeved on the reference column 2 with the two groups of steering sleeves 3, adjusting the inclination angle of the steering sleeve 3 and the depth of the sleeve on the reference column 2, the measuring components consisting of the two groups of connecting rods 5 and the strain gauges 6 can be smoothly installed, thereby compensating for the measurement defects caused by the inability to align the two groups of mounting bases 1 due to the inability to align the positions.

[0035] Furthermore, in order to improve the fastening degree between the reference column 2 and the steering sleeve 3, the outer wall surface of the reference column 2 is also sleeved with an anti-slip sleeve 8, which is made of rubber and has anti-slip grooves on its surface.

[0036] In the embodiment, first, two sets of mounting substrates 1 are installed at the position of the test point, and then two sets of connecting rods 5 are fixedly connected to the two ends of the strain gauge 6, and then the positions of the two sets of steering sleeves 3 on the connecting rods 5 are adjusted so that the steering sleeves 3 can be sleeved on the reference column 2. At this time, the inclination angle of the steering sleeve 3 has been determined, and then the steering sleeve 3 on one side of the reference column 2 is fixed, and then the position of the steering sleeve 3 on the other side is adjusted until the initial measurement value of the strain gauge 6 is 0, and then the steering sleeve 3 on the other side is fixed on the reference column 2 on the other side. At this time, the depth of the steering sleeve 3 sleeved on the reference column 2 is fixed, so that even if there is a deviation in the installation of the mounting substrate 1, it will not affect the initial stress value of the strain gauge 6.

[0037] Example 2

[0038] A bridge structure stress detection device, such as Figure 2-3As shown, in Example 1, if the end of the fastener 4 and the outer wall of the reference column 2 are provided with a flexible gasket to increase the friction, in this case, when a small stress occurs, it will be absorbed by the gasket when it is transmitted from the reference column 2 to the steering sleeve 3, affecting the measurement accuracy. Therefore, on the basis of Example 1, an adapter tube 7 is added between the reference column 2 and the steering sleeve 3 for connection. The adapter tube 7 and the reference column 2 cannot rotate relative to each other, but can slide axially. The adapter tube 7 and the steering sleeve 3 can rotate relative to each other but cannot slide axially, thereby avoiding the problem of stress absorption caused by the friction pad affecting the measurement accuracy.

[0039] Furthermore, the reference column 2 includes a column body 21 , which is axially and vertically mounted on the mounting base plate 1 , and four groups of limiting grooves 22 are evenly and axially formed on the side of the reference column 2 .

[0040] Furthermore, the adapter tube 7 includes a hollow barrel 71, which is sleeved on the outside of the column body 21. At the same time, a limiting block 72 is integrally formed on the inner wall of the barrel 71 corresponding to the position of the limiting groove 22. The limiting block 72 can slide in the limiting groove 22, so that the adapter tube 7 and the reference column 2 cannot rotate relative to each other but can move axially.

[0041] Furthermore, the outer wall surface of the cylinder body 71 is integrally formed with a protrusion outward near the steering sleeve 3 to form a rotating ring 74. The interior of the steering sleeve 3 is provided with a rotating groove 32 that can accommodate the rotating ring 74. The rotating ring 74 is sleeved in the rotating groove 32 and the steering sleeve 3 can rotate around the cylinder body 71. At this time, the steering sleeve 3 can rotate around the adapter cylinder 7, but cannot slide along the axial direction of the adapter cylinder 7.

[0042] The outer wall surface of the cylinder body 71 is integrally formed near the mounting base plate 1 to protrude outward to form a second protruding ring 73, and the steering sleeve 3 is integrally formed near the adapter cylinder 7 to protrude outward to form a first protruding ring 31. Two sets of second screws 43 are symmetrically threaded on the first protruding ring 31. After the second screws 43 are tightened, they are interference fit with the second protruding ring 73, thereby fixing the angle between the steering sleeve 3 and the adapter cylinder 7.

[0043] Furthermore, the side wall surface of the second protruding ring 73 is evenly threaded with multiple groups of first screws 41 , and the first screws 41 are interference fit with the column body 21 , thereby fixing the axial position between the adapter tube 7 and the reference column 2 .

[0044] In a preferred embodiment, a mounting groove 75 is provided at a position of the second convex ring 73 corresponding to the first convex ring 31, and an anti-slip ring 76 is bonded in the mounting groove 75. A second anti-slip head 44 is installed at one end of the second screw 43 close to the second convex ring 73. The second anti-slip head 44 and the anti-slip ring 76 are both made of rubber and are provided with anti-slip pads, which further increase the friction between the steering sleeve 3 and the adapter tube 7 and increase the tightness between the steering sleeve 3 and the adapter tube 7.

[0045] In a preferred embodiment, a long first anti-slip pad 23 is fixedly installed at the bottom of the limiting groove 22. The first anti-slip pad 23 is made of rubber. The end of the first screw 41 is also fixedly installed with a first anti-slip head 42. The first anti-slip pad 23 and the first anti-slip head 42 are both made of rubber and are provided with anti-slip pads, which further increase the friction between the reference column 2 and the adapter tube 7 and increase the tightness of the reference column 2 and the adapter tube 7.

[0046] In this embodiment, by adding an adapter tube 7 between the reference column 2 and the steering sleeve 3, the adapter tube 7 can slide axially along the reference column 2 but cannot rotate around the reference column 2, and the adapter tube 7 can rotate around the steering sleeve 3 but cannot slide axially along the steering sleeve 3. Even if there is an installation deviation of the mounting base 1, the initial stress value of the strain gauge 6 will not be affected. At the same time, the problem of stress absorption caused by the friction pad in the embodiment affecting the measurement accuracy is avoided.

[0047] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in this invention is defined by the appended claims and their equivalents.

Claims

1. A bridge structure stress detection device, comprising two sets of mounting base plates (1) respectively mounted at points to be measured, wherein a reference column (2) is fixedly mounted on the mounting base plates (1), characterized in that: The outer wall surface of the reference column (2) is sleeved with a steering sleeve (3) that can rotate around the reference column (2) and move axially. The outer wall surface of the steering sleeve (3) is threadedly connected with a fastener (4). After the fastener (4) is tightened, it has an interference fit with the reference column (2). The other end of the steering sleeve (3) is detachably mounted with a connecting rod (5). A group of strain gauges (6) is fixedly mounted between two groups of the connecting rods (5).

2. A bridge structure stress detection device according to claim 1, characterized in that: The invention also includes a switching tube (7), wherein the reference column (2) includes a column body (21), the column body (21) is axially and vertically mounted on the mounting base plate (1), and four groups of limiting grooves (22) are evenly and axially opened on the side of the reference column (2). The switching tube (7) includes a hollow cylinder body (71), and the cylinder body (71) is sleeved on the outside of the column body (21). At the same time, the inner wall of the cylinder body (71) is integrally formed with a limiting block (72) corresponding to the position of the limiting groove (22), and the limiting block (72) can slide in the limiting groove (22).

3. A bridge structure stress detection device according to claim 2, characterized in that: The outer wall of the barrel (71) is integrally formed near the position of the steering sleeve (3) to protrude outwards to form a rotating ring (74); a rotating groove (32) for accommodating the rotating ring (74) is provided inside the steering sleeve (3); the rotating ring (74) is sleeved in the rotating groove (32) and the steering sleeve (3) can rotate around the barrel (71).

4. A bridge structure stress detection device according to claim 3, characterized in that: The outer wall surface of the cylinder body (71) is integrally formed at a position close to the mounting base plate (1) to protrude outwards to form a second protruding ring (73); the steering sleeve (3) is integrally formed at a position close to the adapter cylinder (7) to protrude outwards to form a first protruding ring (31); two groups of second screws (43) are symmetrically threaded on the first protruding ring (31); and the second screws (43) are interference-fitted with the second protruding ring (73) after being tightened.

5. The bridge structure stress detection device according to claim 4, characterized in that: The side wall surface of the second convex ring (73) is evenly threaded with multiple groups of first screws (41), and the first screws (41) are interference-fitted with the column body (21).

6. The bridge structure stress detection device according to claim 4, characterized in that: The second convex ring (73) is provided with a mounting groove (75) at a position corresponding to the first convex ring (31), and an anti-slip ring (76) is bonded in the mounting groove (75). A second anti-slip head (44) is installed at one end of the second screw (43) close to the second convex ring (73), and the second anti-slip head (44) and the anti-slip ring (76) are both made of rubber and are provided with anti-slip pads.

7. The bridge structure stress detection device according to claim 2, characterized in that: A first anti-slip pad (23) is fixedly installed at the bottom of the limiting groove (22), and the first anti-slip pad (23) is made of rubber. A first anti-slip head (42) is also fixedly installed at the end of the first screw (41), and the first anti-slip pad (23) and the first anti-slip head (42) are both made of rubber and are provided with anti-slip pads.

8. The bridge structure stress detection device according to claim 1, characterized in that: The outer wall surface of the reference column (2) is also sleeved with an anti-skid sleeve (8), which is made of rubber and has anti-skid patterns on its surface.

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