Omnidirectional stressometer

Abstract

An omnidirectional stressometer comprises an oil bag with a hollow cavity, oil pipes are arranged at the two ends of the oil bag in the length direction, and the oil pipes are communicated with the hollow cavity in the oil bag; the ends, away from the oil bag, of the two oil pipes are provided with plugging pieces and external connection pipes correspondingly, and the external connection pipes are connected to the pressure detection mechanism. Four clamping plates are arranged on the oil bag in the length direction in the circumferential direction, and the clamping plates move in the direction close to or away from the oil bag. Different from an existing stress meter symmetrically provided with clamping plates, the device can detect stress in the horizontal direction and stress in the vertical direction at the same time, so that a single device can replace the existing two stress meters for use, and in the structure, by means of the arrangement of the large-specification oil bag, the device can be suitable for drilling of more specifications.

Description

Technical Field

[0001] The utility model relates to the technical field of mining stress gauges, in particular to an omnidirectional stress gauge. Background Art

[0002] The clamping plates of conventional strain gauges are generally arranged symmetrically, so they can only monitor stress from the vertical or horizontal direction. Therefore, in order to monitor horizontal and vertical stresses, two strain gauges need to be arranged, and for the monitoring effect, the clamping plates of the above-mentioned strain gauges must be arranged parallel to the top plate or the bottom plate, which has limitations. Moreover, the above-mentioned strain gauges generally use smaller oil bags. Therefore, after the aperture of the borehole changes, the smaller oil bags often fail to support the clamping plates to the position of contact with the inner wall of the borehole due to the small amount of expansion deformation, which eventually causes the equipment to become unusable. Utility Model Content

[0003] In order to solve the problem that the above-mentioned stress gauge cannot perform omnidirectional monitoring and the oil bag deformation is small, the utility model provides an omnidirectional stress gauge.

[0004] The technical solution of this utility model is as follows:

[0005] An omnidirectional stress gauge comprises an oil bag with a hollow cavity, wherein both ends of the oil bag in the length direction are provided with oil pipes, and the oil pipes are connected with the hollow cavity of the oil bag;

[0006] The ends of the two oil pipes away from the oil bag are respectively provided with a plugging piece and an external pipe, and the external pipe is connected to the pressure detection mechanism;

[0007] The oil bag is provided with four clamping plates in the circumferential direction around the length direction, and the moving direction of the clamping plates is the direction approaching or moving away from the oil bag.

[0008] Different from the existing stress gauges, it can detect stress in both horizontal and vertical directions at the same time, so a single structure can complete omnidirectional stress monitoring. In addition, in the above structure, the oil bag structure located in the center is larger, so it can be applied to drilling holes of more specifications through deformation.

[0009] In order to achieve support for the splint in four directions, the cross section of the oil bag is square.

[0010] As a preferred solution, the oil pipe is located at the central axis of the oil bag.

[0011] The specific structure of the clamp is that the surface of the clamp facing away from the oil bag is an arc surface, and the distance between any point of the arc surface and the central axis of the oil bag is a constant value. The four clamps can be inserted into the drill hole in a cylindrical state and ensure that the oil bag is located in the center, which is convenient for monitoring the stress in the vertical and horizontal directions.

[0012] In order to avoid mutual interference between the clamping plates, the width of the clamping plates is not greater than the width of the oil bag.

[0013] In order to facilitate the insertion of the device into the drill hole, the clamping plate is provided with a convergence section at both ends of the oil bag in the length direction, and the distance between the convergence section and the central axis of the oil bag gradually decreases in the direction away from the middle of the clamping plate. The outer diameter of the end is small, which can facilitate insertion into the drill hole.

[0014] As a preferred solution, the converging section is provided with a groove, and the length direction of the groove is perpendicular to the length direction of the oil bag. The provision of the groove can be used for bundling, positioning and installing multiple clamping plates in the initial assembly.

[0015] In order to facilitate the assembly of the structural parts, the blocking member and the external pipe are arranged to be extended relative to the clamping plate. The arrangement positions of the blocking member and the external pipe are convenient for disassembly and assembly.

[0016] In order to realize quick disassembly and assembly with the pressure detection mechanism, a quick connector is provided at the end of the external pipe away from the oil bag.

[0017] The beneficial effects of the utility model are as follows: the utility model is an omnidirectional stress gauge, which is different from the existing structure. A single device can monitor stress in both horizontal and vertical directions, and the four splints after the above structure is combined can be regarded as a cylindrical structure, which can be directly inserted into the drill hole, and then only need to be rotated to the corresponding angle according to needs, and in order to facilitate plug-in, a convergence section is also provided at the end. In the above structure, the oil bag structure located in the middle is larger, so the deformation is larger, and it can be suitable for drill holes of different specifications and diameters to a large extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] By reading the detailed description of the preferred embodiment below, the scheme and advantages of the present application will become clear to those skilled in the art. The accompanying drawings are only used to illustrate the preferred embodiment and are not considered to be limiting of the present invention.

[0019] In the attached picture:

[0020] Figure 1 It is a schematic diagram of the structure of the utility model;

[0021] Figure 2 This is a schematic diagram of the front view structure of the utility model;

[0022] Figure 3 This is a schematic diagram of the cross-sectional structure of the utility model;

[0023] Figure 4 It is a schematic diagram of the local structure of the utility model;

[0024] Figure 5 for Figure 4 Schematic diagram of the cross-section structure;

[0025] Figure 6 This is a schematic diagram of the structure of the utility model when viewed from above;

[0026] The components represented by the reference numerals in the figure are:

[0027] 1. Oil bag; 2. Oil pipe; 3. Clamp; 31. Converging section; 32. Groove; 4. Sealing piece; 5. External pipe; 6. Quick connector. DETAILED DESCRIPTION

[0028] like Figure 1-6 An omnidirectional strain gauge is shown, comprising an oil bladder 1 with a hollow cavity. Conventional oil bladders 1 are generally elliptical, but the present device is different. The oil bladder 1 of the present device is a rectangular parallelepiped structure, and the cross-section of the oil bladder 1 is square. By adopting the above design, it is convenient to adjust the angle in the borehole according to the structure of the oil bladder 1, and it is convenient to monitor stress in four directions.

[0029] In order to adjust the oil filling amount in the hollow cavity of the oil bladder 1, oil pipes 2 are provided at both ends of the oil bladder 1 in the length direction, and the oil pipes 2 are connected to the hollow cavity of the oil bladder 1. When in use, oil can be filled into the oil bladder 1 through the oil pipes 2 to cause it to deform and expand. For applicability considerations, the oil pipe 2 is located at the central axis position of the oil bladder 1, which is convenient for standardization and is arranged in the center to facilitate control of the oil filling amount and removal of oil or air in the oil bladder 1.

[0030] In order to ensure that the state of the oil bag 1 after filling with oil can be kept constant without pressure, the ends of the two oil pipes 2 away from the oil bag 1 are respectively provided with a plugging piece 4 and an external tube 5, wherein the plugging piece 4 is used to seal the oil pipe 2, and the plugging piece 4 is generally connected to the oil pipe 2 by a thread, and the plugging piece 4 can adopt a regular hexagonal prism structure, which is convenient for disassembly and assembly using tools, and when necessary, a sealing strip-like structure can be provided, and the external tube 5 is connected to the pressure detection mechanism. Under normal circumstances, the value of the pressure monitoring mechanism will not change, but if the oil bag 1 is affected by external force, the reading of the pressure monitoring device will change accordingly, thereby obtaining the necessary stress monitoring function.

[0031] In the above structure, it should be noted that, in order to facilitate the assembly of the structural parts, the blocking member 4 and the external pipe 5 are arranged outside the clamping plate 3. The setting position of the blocking member 4 and the external pipe 5 is convenient for disassembly and assembly, avoiding the phenomenon that the tool cannot be used due to the obstruction of the clamping plate 3.

[0032] The oil bag 1 alone cannot detect the stress in the corresponding direction. Therefore, in order to enable the equipment to have the functions of vertical and horizontal stress monitoring, such as Figure 6As shown, the oil bladder 1 is provided with four clamps 3 circumferentially around the length direction, and the movement direction of the clamps 3 is the direction approaching or moving away from the oil bladder 1. Therefore, when subjected to corresponding stress, the clamps 3 can move and squeeze the oil bladder 1 to cause a numerical change in the pressure detection mechanism connected thereto.

[0033] And if Figure 1 As shown, the specific structure of the clamping plate 3 is that the surface of the clamping plate 3 facing away from the oil bag 1 is an arc-shaped surface. Since the drilled hole is a circular hole, if it is to be inserted into the opening and closely attached to the inner wall of the drilled hole, the outer surface of the clamping plate 3 is preferably circular, and the distance value between any point of the arc-shaped surface and the central axis of the oil bag 1 is a constant value, that is, Figure 6 As shown, the device can be regarded as a cylindrical structure, and can be inserted into the corresponding opening and abut against the inner wall of the borehole. Then, the four clamps 3 can be inserted into the borehole in a cylindrical state and ensure that the oil bag 1 is located in the center position, which is convenient for monitoring the vertical and horizontal stresses.

[0034] In order to realize quick disassembly and assembly with the pressure detection mechanism, a quick connector 6 is provided at the end of the external pipe 5 away from the oil bag 1; quick connection through the quick connector 6 is conducive to quick operation during disassembly and assembly.

[0035] The above structure can be used to detect stress in both horizontal and vertical directions at the same time, which is different from the existing stress gauge. Therefore, a single structure can complete omnidirectional stress monitoring. In addition, in the above structure, the oil bag 1 has a larger structure and therefore has a larger deformation amount, which can have stronger applicability.

[0036] In addition to the above structure, in order to improve the user experience of the device, the following design method can also be adopted.

[0037] like Figure 1 As shown, in order to facilitate the insertion of the device into the drilled hole, the clamping plate 3 is provided with a converging section 31 at both ends of the oil bag 1 in the length direction, and the distance between the converging section 31 and the central axis of the oil bag 1 gradually decreases in the direction away from the middle of the clamping plate 3. The outer diameter of the end is small, which can facilitate insertion into the drilled hole.

[0038] Furthermore, based on the above structure, the converging section 31 is provided with a groove 32, and the length direction of the groove 32 is perpendicular to the length direction of the oil bag 1. The groove 32 can be used for bundling, positioning and installing multiple clamping plates 3 in the initial assembly.

[0039] Finally, in order to improve the connection strength of the oil pipe 2, the side length of the oil bag 1 is greater than the diameter of the oil pipe 2, and the oil bag 1 is connected to the oil pipe 2 through a bell mouth.

Claims

1. An omnidirectional strain gauge, characterized in that: It comprises an oil sac (1) with a hollow cavity, wherein both ends of the oil sac (1) in the length direction are provided with oil pipes (2), and the oil pipes (2) are connected to the hollow cavity of the oil sac (1); Ends of the two oil pipes (2) away from the oil bag (1) are respectively provided with a blocking piece (4) and an external pipe (5), and the external pipe (5) is connected to a pressure detection mechanism; The oil bag (1) is provided with four clamping plates (3) in a circumferential direction around the length direction, and the moving direction of the clamping plates (3) is a direction approaching or moving away from the oil bag (1).

2. An omnidirectional strain gauge according to claim 1, characterized in that: The cross section of the oil bag (1) is square.

3. An omnidirectional strain gauge according to claim 2, characterized in that: The oil pipe (2) is located at the central axis of the oil bag (1).

4. The omnidirectional strain gauge according to claim 2, characterized in that: The surface of the clamping plate (3) facing away from the oil bag (1) is an arc-shaped surface, and the distance between any point on the arc-shaped surface and the central axis of the oil bag (1) is a constant value.

5. The omnidirectional strain gauge according to claim 2, characterized in that: The width of the clamping plate (3) is no greater than the width of the oil bag (1).

6. The omnidirectional strain gauge according to claim 4, characterized in that: The clamping plate (3) is provided with convergent sections (31) at both ends of the oil sac (1) in the length direction, and the distance between the convergent section (31) and the central axis of the oil sac (1) gradually decreases in the direction away from the middle of the clamping plate (3).

7. An omnidirectional strain gauge according to claim 6, characterized in that: The converging section (31) is provided with a groove (32), and the length direction of the groove (32) is perpendicular to the length direction of the oil bag (1).

8. The omnidirectional strain gauge according to claim 1, characterized in that: The blocking member (4) and the external pipe (5) are arranged outwardly relative to the clamping plate (3).

9. The omnidirectional strain gauge according to claim 5, characterized in that: A quick connector (6) is provided at the end of the external pipe (5) away from the oil bag (1).

10. An omnidirectional strain gauge according to any one of claims 1 to 9, characterized in that: The side length of the oil bag (1) is greater than the diameter of the oil pipe (2), and the oil bag (1) is connected to the oil pipe (2) through a bell mouth.

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