Indoor complete machine calibration device for vertical drilling strain gauge

Abstract

The utility model relates to the field of earth crust stress strain observation, in particular to an indoor complete machine calibration device for a vertical drilling strain gauge, which comprises a mounting frame, a pressurizing assembly is arranged on one side of the mounting frame and used for changing the vertical stress of surrounding rock, and a mounting plate is fixedly connected to one side of the mounting frame and used for fixing the mounting plate. One side of the mounting plate is fixedly connected with a positioning assembly, the cylindrical surface of the positioning assembly is provided with a driving mechanism, the driving mechanism is in threaded connection with the positioning assembly, the cylindrical surface of the positioning assembly is rotatably connected with a fixing device, and the fixing device is matched with the driving mechanism. And meanwhile, indoor calibration of the whole machine is effectively performed.

Description

Technical Field

[0001] This utility model relates to the field of crustal stress and strain observation, specifically an indoor calibration device for a vertical borehole strain gauge. Background Technology

[0002] Vertical borehole strain gauges are used to observe the relative changes in the vertical stress-strain state of the Earth's crust. A vertical borehole strain gauge consists of a long, cylindrical probe. During use, the probe is vertically inserted into the borehole, and cement is used to couple and solidify the probe to the surrounding rock. The vertical stress and strain of the surrounding rock are transmitted to the probe through the cement, causing axial tension and compression. This change is recorded by a high-precision capacitive sensor inside the probe.

[0003] The probe housing of the vertical borehole strain gauge participates in the measurement process and is the core elastic sensing element. During the indoor calibration of the entire instrument, the entire probe needs to be loaded and its elastic deformation measured. Due to the extremely high measurement accuracy of the vertical borehole strain gauge, with a measurement resolution at the level of the strain of the rotating ring (10) to the rotating ring (10), uncertainties caused by the mechanical deformation error of the calibration device, the stability of the force source, the resolution of the standard testing equipment, temperature changes, and environmental vibrations have a significant impact on the measurement results. Therefore, there is currently no effective indoor calibration device for the entire instrument. The common practice now is to calibrate the capacitive sensor inside the probe separately, but this obviously cannot represent the overall performance of the instrument.

[0004] This invention aims to solve the technical problems existing in the prior art. To this end, it proposes an indoor calibration device for a vertical borehole strain gauge. Utility Model Content

[0005] The purpose of this invention is to provide an indoor calibration device for a vertical borehole strain gauge to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] An indoor calibration device for a vertical borehole strain gauge includes a mounting frame, on one side of which a pressurizing component is provided for changing the vertical stress of the surrounding rock.

[0008] A mounting plate is fixedly connected to one side of the mounting bracket, and a positioning component is fixedly connected to one side of the mounting plate. A driving mechanism is provided on the cylindrical surface of the positioning component. The driving mechanism is threadedly connected to the positioning component. A fixing device is rotatably connected to the cylindrical surface of the positioning component. The fixing device cooperates with the driving mechanism.

[0009] As a further embodiment of this utility model: the positioning component includes a sleeve, a support rod is fixedly connected to the cylindrical surface of the sleeve, a cylinder is fixedly connected to the other end of the support rod, the other end of the cylinder is fixedly connected to the mounting plate, the cylinder is used to drive the vertical drilling strain gauge to move vertically, and the cylindrical surface of the sleeve is threadedly connected to the driving mechanism.

[0010] As a further embodiment of this utility model: the driving mechanism includes a rotating ring, which is sleeved on the cylindrical surface of the sleeve. The inner surface of the rotating ring is provided with an internal thread. The rotating ring is threadedly connected to the sleeve. Several actuating rods are fixedly connected to the cylindrical surface of the rotating ring. The rotating ring cooperates with the fixing device.

[0011] As a further embodiment of this utility model: the fixing device includes several swing arms and sliders, the swing arms are rotatably connected to the sleeve, a spring is fixedly connected to one side of the swing arm, the other end of the spring is fixedly connected to the sleeve, and a connecting groove is opened at the other end of the swing arm.

[0012] As a further embodiment of this utility model: the slider is horizontally slidably connected to the sleeve, a push rod is fixedly connected to one side of the sleeve, a connecting rod is fixedly connected to the other end of the push rod, the connecting rod passes through the connecting groove and slides in contact with the swing arm, and a clamping block is fixedly connected to the other end of the slider, the clamping block is used to fix the vertical drilling strain gauge.

[0013] As a further embodiment of this utility model: the pressurizing component includes a pressurizer, which is fixedly connected to the mounting bracket. A hydraulic rod is fixedly connected to one end of the pressurizer, and a connecting plate is fixedly connected to the other end of the hydraulic rod. A plurality of extrusion rods are fixedly connected to the other end of the connecting plate, and the extrusion rods penetrate the mounting plate and slide in contact with the mounting plate.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: When the device is in use, the vertical drilling strain gauge passes through the sleeve, and then the rotating ring is rotated by the actuating rod. The rotating ring drives the internal thread to rotate. Since the rotating ring is connected to the sleeve threadedly through the internal thread, the rotating ring moves vertically when it drives the internal thread to rotate. When the rotating ring rises, it squeezes the swing arm, and the other end of the swing arm drives the connecting groove to move. That is, the swing arm drives the push rod to move towards the circular shape of the sleeve through the connecting groove. The push rod then drives the slider and the clamping block to move. That is, the slider and the clamping block measure the vertical drilling strain. The instrument is positioned and fixed to ensure that the center of the vertical borehole strain gauge and the circular sleeve are on the same vertical line. Then, the support rod is raised and lowered by the cylinder, which in turn drives the sleeve to rise and fall. The sleeve, through the clamping block, drives the vertical borehole strain gauge to rise and fall into the borehole. Then, the hydraulic rod is extended by the pressure device, which drives the connecting plate to fall. The connecting plate then drives several extrusion rods to fall and apply pressure to the vertical stress of the surrounding rock in the borehole, thus facilitating the calibration of the entire instrument. This device facilitates the positioning and fixing of the vertical borehole strain gauge and effectively enables indoor calibration of the entire instrument. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of an indoor calibration device for a vertical borehole strain gauge.

[0016] Figure 2 for Figure 1 Sectional view.

[0017] Figure 3 This is a schematic diagram of the fixing device in an indoor calibration device for a vertical borehole strain gauge.

[0018] 1-Mounting bracket, 2-Pressure pressurizer, 3-Hydraulic rod, 4-Connecting plate, 5-Mounting plate, 6-Pressure rod, 7-Cylinder, 8-Support rod, 9-Sleeve, 10-Rotating ring, 11-Actuating rod, 12-Swing arm, 13-Spring, 14-Connecting groove, 15-Push rod, 16-Slider, 17-Clamping block, 18-Internal thread, 19-Connecting rod. Detailed Implementation

[0019] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0020] The following disclosure provides numerous different embodiments or examples for implementing various structures of the present invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed.

[0021] Please see Figure 1-3 In this embodiment of the present invention, an indoor calibration device for a vertical borehole strain gauge includes a mounting frame 1, on one side of which a pressurizing component is provided. The pressurizing component is used to change the vertical stress of the surrounding rock.

[0022] The mounting bracket 1 is fixedly connected to a mounting plate 5 on one side, and a positioning component is fixedly connected to a positioning component on the other side. The cylindrical surface of the positioning component is provided with a driving mechanism, which is threadedly connected to the positioning component. The cylindrical surface of the positioning component is rotatably connected to a fixing device, which cooperates with the driving mechanism. This device facilitates the positioning and fixing of the vertical drilling strain gauge, and effectively performs indoor calibration of the entire machine.

[0023] Please see Figure 1-3The positioning component includes a sleeve 9, a support rod 8 is fixedly connected to the cylindrical surface of the sleeve 9, a cylinder 7 is fixedly connected to the other end of the support rod 8, and the other end of the cylinder 7 is fixedly connected to the mounting plate 5. The cylinder 7 is used to drive the vertical drilling strain gauge to move vertically, and the cylindrical surface of the sleeve 9 is threadedly connected to the drive mechanism.

[0024] Please see Figure 2-3 The driving mechanism includes a rotating ring 10, which is sleeved on the cylindrical surface of the sleeve 9. The inner surface of the rotating ring 10 is provided with an internal thread 18. The rotating ring 10 is threadedly connected to the sleeve 9. Several actuating rods 11 are fixedly connected to the cylindrical surface of the rotating ring 10. The rotating ring 10 cooperates with the fixing device.

[0025] Please see Figure 2-3 The fixing device includes several swing arms 12 and sliders 16. The swing arms 12 are rotatably connected to the sleeve 9. A spring 13 is fixedly connected to one side of the swing arm 12. The other end of the spring 13 is fixedly connected to the sleeve 9. A connecting groove 14 is opened at the other end of the swing arm 12.

[0026] Please see Figure 3 The slider 16 is horizontally slidably connected to the sleeve 9. A push rod 15 is fixedly connected to one side of the sleeve 9, and a connecting rod 19 is fixedly connected to the other end of the push rod 15. The connecting rod 19 passes through the connecting groove 14 and slides in contact with the swing arm 12. A clamping block 17 is fixedly connected to the other end of the slider 16. The clamping block 17 is used to fix the vertical drilling strain gauge.

[0027] Please see Figure 1-2 The pressurizing assembly includes a pressurizer 2, which is fixedly connected to the mounting bracket 1. One end of the pressurizer 2 is fixedly connected to a hydraulic rod 3, and the other end of the hydraulic rod 3 is fixedly connected to a connecting plate 4. The other end of the connecting plate 4 is fixedly connected to a plurality of extrusion rods 6, which penetrate the mounting plate 5 and slide in contact with the mounting plate 5.

[0028] The working principle of this utility model is as follows: When the device is in use, the vertical drilling strain gauge passes through the sleeve 9, and then the rotating ring 10 is rotated by the actuating rod 11. The rotating ring 10 drives the internal thread 18 to rotate. Since the rotating ring 10 is threadedly connected to the sleeve 9 through the internal thread 18, the rotating ring 10 moves vertically when it drives the internal thread 18 to rotate. When the rotating ring 10 rises, it presses against the swing arm 12. The other end of the swing arm 12 drives the connecting groove 14 to move. That is, the swing arm 12 drives the push rod 15 to move towards the circle of the sleeve 9 through the connecting groove 14. The push rod 15 drives the slider 16 and the clamping block 17 to move. That is, the slider 16 moves through the connecting groove 14. Clamping block 17 positions and fixes the vertical borehole strain gauge, ensuring that the center of the vertical borehole strain gauge and the circular sleeve 9 are on the same vertical line. Then, the support rod 8 is raised and lowered by cylinder 7, that is, the support rod 8 drives the sleeve 9 to rise and fall. The sleeve 9, through clamping block 17, drives the vertical borehole strain gauge to rise and fall into the borehole. Then, the hydraulic rod 3 is extended by pressurizer 2, that is, the hydraulic rod 3 drives the connecting plate 4 to fall. The connecting plate 4 drives several extrusion rods 6 to fall and apply vertical stress to the surrounding rock of the borehole, thereby facilitating the calibration of the entire instrument. This device facilitates the positioning and fixing of the vertical borehole strain gauge and effectively enables indoor calibration of the entire instrument.

[0029] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0030] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An indoor calibration device for a vertical borehole strain gauge, comprising a mounting bracket (1), characterized in that, A pressurizing component is provided on one side of the mounting frame (1), which is used to change the vertical stress of the surrounding rock; The mounting bracket (1) is fixedly connected to a mounting plate (5) on one side, and a positioning component is fixedly connected to a positioning component on one side. The cylindrical surface of the positioning component is provided with a driving mechanism, which is threadedly connected to the positioning component. The cylindrical surface of the positioning component is rotatably connected to a fixing device, which cooperates with the driving mechanism.

2. The indoor calibration device for a vertical borehole strain gauge according to claim 1, characterized in that, The positioning component includes a sleeve (9), a support rod (8) is fixedly connected to the cylindrical surface of the sleeve (9), a cylinder (7) is fixedly connected to the other end of the support rod (8), and the other end of the cylinder (7) is fixedly connected to the mounting plate (5). The cylinder (7) is used to drive the vertical drilling strain gauge to move vertically, and the cylindrical surface of the sleeve (9) is threadedly connected to the drive mechanism.

3. The indoor calibration device for a vertical borehole strain gauge according to claim 2, characterized in that, The driving mechanism includes a rotating ring (10), which is sleeved on the cylindrical surface of the sleeve (9). The inner surface of the rotating ring (10) is provided with an internal thread (18). The rotating ring (10) is threadedly connected to the sleeve (9). Several actuating rods (11) are fixedly connected to the cylindrical surface of the rotating ring (10). The rotating ring (10) cooperates with the fixing device.

4. The indoor calibration device for a vertical borehole strain gauge according to claim 3, characterized in that, The fixing device includes several swing arms (12) and sliders (16). The swing arms (12) are rotatably connected to the sleeve (9). A spring (13) is fixedly connected to one side of the swing arm (12). The other end of the spring (13) is fixedly connected to the sleeve (9). A connecting groove (14) is opened at the other end of the swing arm (12).

5. The indoor calibration device for a vertical borehole strain gauge according to claim 4, characterized in that, The slider (16) is horizontally slidably connected to the sleeve (9). A push rod (15) is fixedly connected to one side of the sleeve (9), and a connecting rod (19) is fixedly connected to the other end of the push rod (15). The connecting rod (19) passes through the connecting groove (14) and slides in contact with the swing arm (12). A clamping block (17) is fixedly connected to the other end of the slider (16). The clamping block (17) is used to fix the vertical drilling strain gauge.

6. The indoor calibration device for a vertical borehole strain gauge according to claim 1, characterized in that, The pressurizing assembly includes a pressurizer (2), which is fixedly connected to the mounting bracket (1). One end of the pressurizer (2) is fixedly connected to a hydraulic rod (3), and the other end of the hydraulic rod (3) is fixedly connected to a connecting plate (4). The other end of the connecting plate (4) is fixedly connected to a plurality of extrusion rods (6), which penetrate the mounting plate (5) and slide in contact with the mounting plate (5).

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