Oil pressure type borehole stressometer

Abstract

The utility model discloses an oil pressure type borehole stressometer, and belongs to the technical field of borehole stressometers. An oil pressure type borehole stressometer comprises an oil pressure pillow; the connecting part is fixedly connected to the oil pressure pillow; an arc-shaped groove is formed in the oil pressure pillow; a plurality of arc-shaped grooves are uniformly distributed on the oil pressure pillow; a clamping piece is fixedly connected in the arc-shaped groove; the arc-shaped groove is a concave groove, the clamping piece is a convex piece, and the bottom of the clamping piece is matched with the arc-shaped groove; according to the utility model, the arc-shaped groove and the arc-shaped clamping piece on the oil pressure pillow are matched for use, so that the clamping piece can be tightly attached to the oil pressure pillow, stress can be effectively transmitted during detection, and measurement errors are reduced; meanwhile, the oil pressure pillow is made of high-elasticity alloy steel, has good elasticity and strength, can bear large pressure change and is not prone to damage, and the service life and stability of the whole stress meter are guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to borehole stress meter device technical field especially relates to an oil pressure type borehole stress meter. BACKGROUND

[0002] In the field of geotechnical engineering such as mine exploitation, tunnel excavation, underground engineering construction, accurately monitoring the stress state of rock mass is crucial to the stability and safety of the project; in the prior art, there are many rock mass stress measurement methods, and the borehole stress meter is one of the commonly used measurement equipment.

[0003] The traditional borehole stress meter has some obvious deficiencies: the adhesion of part of the stress meter and the inner wall of the borehole is poor, and large errors are easily generated in the stress transmission process, which may cause inaccurate measurement data; and the material elasticity and strength of some stress meters are limited, which is easy to be damaged in the complex underground stress environment, not only affecting the continuity of measurement, but also increasing the equipment replacement and maintenance cost. UTILITY MODEL CONTENT

[0004] The utility model aims at solving the problems in the background art and provides an oil pressure type borehole stress meter.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0006] An oil pressure type borehole stress meter comprises:

[0007] An oil pressure pillow;

[0008] A connecting part is fixedly connected to the oil pressure pillow;

[0009] An arc-shaped groove is formed in the oil pressure pillow;

[0010] A plurality of arc-shaped grooves are uniformly distributed on the oil pressure pillow;

[0011] A clamping piece is fixedly connected in the arc-shaped groove.

[0012] Preferably, the arc-shaped groove is a groove, the clamping piece is a convex piece, and the bottom of the clamping piece matches the arc-shaped groove.

[0013] Preferably, an exhaust valve is fixedly connected to one end of the oil pressure pillow away from the connecting part.

[0014] Further, the connecting part is a high-pressure metal hose.

[0015] Compared with the prior art, the utility model provides an oil pressure type borehole stress meter, which has the following beneficial effects:

[0016] The part not involved in the device is same as or can be realized by the prior art, the arc-shaped groove and the arc-shaped clamping piece on the oil pressure pillow are matched for use, the clamping piece can be tightly attached to the oil pressure pillow, stress can be effectively transmitted during detection, and measurement error is reduced; meanwhile, the oil pressure pillow is made of high-elastic alloy steel, has good elasticity and strength, can bear large pressure change, is not easy to be damaged, and guarantees the service life and stability of the stress meter as a whole. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 A structural schematic view of the oil pressure type borehole stress meter is provided for the utility model;

[0018] Figure 2 An exploded view of the oil pressure type borehole stress meter is provided for the utility model;

[0019] Figure 3 A structural schematic view of the oil pressure pillow in the oil pressure type borehole stress meter is provided for the utility model.

[0020] In the drawing: 1, oil pressure pillow; 101, exhaust valve; 102, connecting part; 103, arc-shaped groove; 2, clamping piece. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments.

[0022] Embodiment 1:

[0023] Referring to Figures 1-3 An oil pressure type borehole stress meter comprises:

[0024] The oil pressure pillow 1;

[0025] The connecting part 102 is fixedly connected to the oil pressure pillow 1;

[0026] The arc-shaped groove 103 is arranged on the oil pressure pillow 1;

[0027] The plurality of arc-shaped grooves 103 are evenly distributed on the oil pressure pillow 1;

[0028] The clamping piece 2 is fixedly connected in the arc-shaped groove 103.

[0029] The arc-shaped groove 103 is a groove, the clamping piece 2 is a convex piece, and the bottom of the clamping piece 2 is matched with the arc-shaped groove 103.

[0030] The exhaust valve 101 is fixedly connected to the end of the oil pressure pillow 1 away from the connecting part 102.

[0031] Referring to Figure 1, through the exhaust valve 101 arranged on the oil pillow 1, the air in the oil pillow 1 is discharged through the exhaust valve 101 before use, so as to avoid the interference of air on pressure measurement and ensure the reliability of measurement data.

[0032] The connecting part 102 is a high-pressure metal hose.

[0033] It should be noted that the connecting part 102 is connected with a multi-way valve at one end away from the oil pillow 1, and a high-precision pressure sensor available on the market is installed on the multi-way valve.

[0034] Referring to Figure 3 The oil pillow 1 is made of high-elasticity alloy steel available on the market.

[0035] Before use, a drill is used to drill a hole with appropriate diameter and depth at the position to be measured, and the assembled oil pillow 1 is placed in the hole;

[0036] In use, hydraulic oil is injected into the oil pillow 1 through the multi-way valve and the connecting part 102, and as the hydraulic oil is continuously injected into the oil pillow 1, the oil pillow 1 will expand, and the oil pillow 1 will drive the clamping piece 2 to adhere to the inner wall of the hole after expansion;

[0037] In detection, when the medium stress around the inner wall of the hole changes, the rock mass of the inner wall of the hole will extrude the clamping piece 2, and when the clamping piece 2 is extruded, the oil pillow 1 will deform synchronously, at which time the oil pressure in the oil pillow 1 will change, at which time the high-precision pressure sensor on the multi-way valve will detect the change of the oil pressure in the oil pillow 1, at which time the staff observes the data change displayed by the sensor, so as to facilitate the measurement staff to statistically analyze and record the oil pressure change data.

[0038] The present application uses the arc-shaped groove 103 on the oil pillow 1 and the arc-shaped clamping piece 2 in cooperation, so that the clamping piece 2 can tightly adhere to the oil pillow 1, thereby effectively transmitting stress in detection and reducing measurement error; meanwhile, the oil pillow 1 is made of high-elasticity alloy steel, has good elasticity and strength, can withstand large pressure changes, and is not easy to be damaged, thereby ensuring the service life and stability of the stress meter as a whole.

[0039] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any skilled person in the art can make equivalent replacement or change according to the technical scheme and inventive concept of the present application within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. An oil pressure type borehole stress meter characterized by comprising: Include: Oil pressure pillow (1); Connecting part (102), fixedly connected to the oil pressure pillow (1); The oil pressure pillow (1) is provided with an arc-shaped groove (103); A plurality of arc-shaped grooves (103) are uniformly distributed on the oil pressure pillow (1); The arc-shaped groove (103) is fixedly connected with a clamping piece (2).

2. An oil pressure type borehole stress meter according to claim 1, wherein The arc-shaped groove (103) is a groove, the clamping piece (2) is a convex piece, and the bottom of the clamping piece (2) matches the arc-shaped groove (103).

3. An oil pressure type borehole stress meter according to claim 1, wherein The oil pressure pillow (1) is fixedly connected with an exhaust valve (101) away from the connecting part (102).

4. An oil pressure type borehole stress meter according to claim 3, characterized by The connecting part (102) is a high-pressure metal hose.

Images