Positioning device for testing Keyser effect

Abstract

The utility model discloses a positioning device for measuring Keyser effect, which relates to the field of positioning devices and comprises an instrument table, a base, two first telescopic rods, a second telescopic rod and an annular support, the bottom of the base is connected to the instrument table, and the top of the base is symmetrically provided with the two first telescopic rods. An annular support is fixedly connected to the top of the first telescopic rod, two second telescopic rods are symmetrically arranged at the top of the annular support, the other annular support is fixedly connected to the tops of the second telescopic rods, and four through holes are evenly formed in the lateral wall bodies of the two annular supports. A bolt penetrates through the through hole and is locked and fixed on two side wall bodies of the annular bracket by using two nuts, an acoustic emission sensor probe is adhered to one end, extending into the annular bracket, of the bolt, and a test piece is placed in the annular bracket and on the instrument table and is in contact with the acoustic emission sensor probe. According to the utility model, eight acoustic emission sensor probes can be accurately positioned on the test piece.

Description

Technical Field

[0001] The utility model relates to the field of positioning devices, in particular to a positioning device for measuring the Kaiser effect. Background Art

[0002] The rock stress is determined by using the Kaiser effect of rock acoustic emission. The method is to take a rock sample from the stratum, reload the rock sample in the laboratory, and calculate the ground stress based on the stress state of the acoustic emission generated during loading. At present, the acoustic emission monitoring uses an eight-channel acoustic emission instrument produced by ESG, Canada, and the sensor uses a Nano30 piezoelectric sensor. In order to reduce the influence of press vibration and friction between the pressure head and the specimen on the identification of the Kaiser effect point, a thin copper sheet and a polytetrafluoroethylene sheet are placed between the specimen and the pressure head, and vaseline is applied between the sensor and the specimen for coupling, and fixed with a rubber band. At present, four acoustic emission sensor probes are fastened to the upper part of the side of the specimen using a rubber band, and another rubber band is used to fasten the other four acoustic emission sensor probes to the lower part of the side of the specimen. The defect of using rubber bands is that the rubber bands are not accurately positioned for the acoustic emission sensor probes, and the rubber bands are easy to loosen or move downward.

[0003] Therefore, those skilled in the art are in urgent need of providing a positioning device for measuring the Kaiser effect, which can accurately position eight acoustic emission sensor probes on a test piece. Utility Model Content

[0004] The utility model aims to provide a positioning device for measuring the Kaiser effect, which can accurately position eight acoustic emission sensor probes on a test piece.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0006] The utility model discloses a positioning device for measuring the Kaiser effect, comprising an instrument platform, a base, a first telescopic rod, a second telescopic rod and an annular bracket, wherein the bottom of the base is connected to the instrument platform, two first telescopic rods are symmetrically arranged on the top of the base, an annular bracket is fixedly connected to the top of the first telescopic rod, two second telescopic rods are symmetrically arranged on the top of the annular bracket, another annular bracket is fixedly connected to the top of the second telescopic rod, four through holes are evenly opened on the lateral walls of the two annular brackets, bolts penetrate the through holes and are locked and positioned on the two side walls of the annular brackets using two nuts, an acoustic emission sensor probe is bonded to one end of the bolt extending into the interior of the annular bracket, a test piece is placed on the instrument platform and the test piece is located inside the annular bracket, and the test piece is in contact with the acoustic emission sensor probe.

[0007] Preferably, the first telescopic rod and the second telescopic rod both include a base tube, a telescopic tube and a knob, the telescopic tube is embedded in the base tube, a screw hole is provided at the top of the side wall of the base tube, and the knob is threadedly connected to the base tube and abuts against the telescopic tube.

[0008] Preferably, the bottom of the bottom tube of the first telescopic rod is welded to the base, and the top of the telescopic tube of the first telescopic rod is welded to the bottom surface of the annular bracket;

[0009] The bottom of the bottom tube of the second telescopic rod is welded to the top surface of the annular bracket, and the top of the telescopic tube of the second telescopic rod is welded to the bottom surface of another annular bracket.

[0010] Preferably, the positions and specifications of the through holes of the two annular supports correspond to each other.

[0011] Preferably, the base is in a ring shape, and the acoustic emission sensor probe is connected to a data acquisition instrument via an acoustic emission sensor line.

[0012] Preferably, a rubber gasket is connected to one end of the two nuts that contacts the annular bracket.

[0013] Preferably, the bottom of the base is bonded to the instrument table by adhesive tape.

[0014] Compared with the prior art, the beneficial technical effects of the utility model are:

[0015] (1) The utility model provides a positioning device for measuring the Kaiser effect, which adjusts the position of a bolt extending into an annular bracket, and makes the acoustic emission sensor probe at the end of the bolt contact with the test piece, the four acoustic emission sensor probes of the upper annular bracket contact with the four surfaces of the test piece, and the four acoustic emission sensor probes of the lower annular bracket contact with the four surfaces of the test piece, so that the eight acoustic emission sensor probes can be accurately positioned on the test piece;

[0016] (2) The utility model can adjust the distance between the annular bracket and the base, and the distance between two annular brackets through the telescopic rod, which is easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The utility model will be further described below in conjunction with the accompanying drawings.

[0018] Figure 1 This is a schematic diagram of the three-dimensional structure of a positioning device for measuring the Kaiser effect of the utility model;

[0019] Figure 2 The utility model is a top view of a positioning device for measuring the Kaiser effect.

[0020] Explanation of the reference numerals: 1. base; 2. first telescopic rod; 3. annular bracket; 4. bolt; 5. nut; 6. rubber gasket; 7. acoustic emission sensor probe; 8. acoustic emission sensor line; 9. second telescopic rod; 10. bottom tube; 11. telescopic tube; 12. knob; 13. instrument table. DETAILED DESCRIPTION

[0021] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0022] like Figure 1-2 As shown, a positioning device for measuring the Kaiser effect includes an instrument table 13, a base 1, a first telescopic rod 2, a second telescopic rod 9 and an annular bracket 3, the bottom of the base 1 is connected to the instrument table 13, two first telescopic rods 2 are symmetrically arranged on the top of the base 1, an annular bracket 3 is fixedly connected to the top of the first telescopic rod 2, two second telescopic rods 9 are symmetrically arranged on the top of the annular bracket 3, another annular bracket 3 is fixedly connected to the top of the second telescopic rod 9, four through holes are evenly opened on the lateral walls of the two annular brackets 3, bolts 4 pass through the through holes and are locked and positioned on the two side walls of the annular bracket 3 using two nuts 5, an end of the bolt 4 extending into the inside of the annular bracket 3 is bonded with an acoustic emission sensor probe 7, a test piece is placed on the instrument table 13 and the test piece is located inside the annular bracket 3, and the test piece is in contact with the acoustic emission sensor probe 7.

[0023] The first telescopic rod 2 and the second telescopic rod 9 both include a base tube 10, a telescopic tube 11 and a knob 12. The telescopic tube 11 is embedded in the base tube 10. A screw hole is provided at the top of the side wall of the base tube 10. The knob 12 is threadedly connected to the base tube 10 and abuts against the telescopic tube 11.

[0024] Specifically, the distance between the lower ring bracket and the base 1 is adjusted by the first telescopic rod 2, and the distance between the two ring brackets 3 is adjusted by the second telescopic rod 9. The knob 12 is abutted against different positions of the telescopic tube 11 to adjust the length of the telescopic rod.

[0025] The bottom of the bottom tube 10 of the first telescopic rod 2 is welded to the base 1, and the top of the telescopic tube 11 of the first telescopic rod 2 is welded to the bottom surface of the annular bracket 3;

[0026] The bottom of the bottom tube 10 of the second telescopic rod 9 is welded to the top surface of the annular bracket 3 , and the top of the telescopic tube 11 of the second telescopic rod 9 is welded to the bottom surface of another annular bracket 3 .

[0027] The positions and specifications of the through holes of the two annular brackets 3 correspond to each other.

[0028] Specifically, the position of the bolt extending into the annular bracket 3 can be adjusted so that the acoustic emission sensor probe 7 at the end of the bolt is in contact with the test piece. The four acoustic emission sensor probes 7 of the upper annular bracket 3 are in contact with the four surfaces of the test piece, and the four acoustic emission sensor probes 7 of the lower annular bracket 3 are in contact with the four surfaces of the test piece, so that the eight acoustic emission sensor probes can be accurately positioned at the position of the test piece.

[0029] The base 1 is in a ring shape, and the acoustic emission sensor probe 7 is connected to a data acquisition instrument via an acoustic emission sensor line 8 .

[0030] Specifically, the annular base 1 facilitates the bottom of the test piece to contact the instrument table, thereby facilitating data collection operations.

[0031] like Figure 2 As shown, the ends of the two nuts 5 that are in contact with the annular bracket 3 are connected with rubber gaskets 6.

[0032] The bottom of the base 1 is bonded to the instrument table 13 by adhesive tape.

[0033] The use process of the utility model is as follows:

[0034] First, place the test piece on the instrument table 13, and bond the acoustic emission sensor probe 7 to the ends of the eight bolts 4 in advance. Then, put the device on the outside of the test piece and adjust the direction so that the directions of the eight bolts correspond to the four surfaces of the test piece. Then, bond the bottom of the base 1 of the device to the instrument table 13;

[0035] Secondly, adjust the position of the bolts 4 on the annular bracket 3 extending into the interior thereof so that the acoustic emission sensor probes 7 at the ends of the bolts contact the four surfaces of the specimen, the four acoustic emission sensor probes 7 of the upper annular bracket 3 contact the four surfaces of the specimen, and the four acoustic emission sensor probes 7 of the lower annular bracket 3 contact the four surfaces of the specimen, thereby enabling the eight acoustic emission sensor probes to be accurately positioned on the four surfaces of the specimen.

[0036] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0037] The embodiments described above are only descriptions of the preferred methods of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should fall within the protection scope determined by the claims of the present invention.

Claims

1. A positioning device for measuring the Kaiser effect, characterized in that: The invention comprises an instrument platform (13), a base (1), a first telescopic rod (2), a second telescopic rod (9) and an annular bracket (3), wherein the bottom of the base (1) is connected to the instrument platform (13), two first telescopic rods (2) are symmetrically arranged on the top of the base (1), an annular bracket (3) is fixedly connected to the top of the first telescopic rod (2), two second telescopic rods (9) are symmetrically arranged on the top of the annular bracket (3), another annular bracket (3) is fixedly connected to the top of the second telescopic rod (9), four through holes are evenly opened on the lateral walls of the two annular brackets (3), bolts (4) pass through the through holes and are locked and positioned on the two side walls of the annular bracket (3) using two nuts (5), an acoustic emission sensor probe (7) is bonded to one end of the bolt (4) extending into the interior of the annular bracket (3), a test piece is placed on the instrument platform (13) and the test piece is located inside the annular bracket (3), and the test piece is in contact with the acoustic emission sensor probe (7).

2. A positioning device for measuring the Kaiser effect according to claim 1, characterized in that: The first telescopic rod (2) and the second telescopic rod (9) both comprise a base tube (10), a telescopic tube (11) and a knob (12); the telescopic tube (11) is embedded in the base tube (10); a screw hole is provided at the top end of the side wall of the base tube (10); the knob (12) is threadedly connected to the base tube (10) and abuts against the telescopic tube (11).

3. A positioning device for measuring Kaiser effect according to claim 2, characterized in that: The bottom of the bottom tube (10) of the first telescopic rod (2) is welded to the base (1), and the top of the telescopic tube (11) of the first telescopic rod (2) is welded to the bottom surface of the annular bracket (3); The bottom of the bottom tube (10) of the second telescopic rod (9) is welded to the top surface of the annular bracket (3), and the top of the telescopic tube (11) of the second telescopic rod (9) is welded to the bottom surface of another annular bracket (3).

4. A positioning device for measuring Kaiser effect according to claim 3, characterized in that: The positions and specifications of the through holes of the two annular supports (3) correspond to each other.

5. A positioning device for measuring Kaiser effect according to claim 1, characterized in that: The base (1) is in the shape of a ring, and the acoustic emission sensor probe (7) is connected to a data acquisition instrument via an acoustic emission sensor line (8).

6. A positioning device for measuring Kaiser effect according to claim 1, characterized in that: One end of the two nuts (5) in contact with the annular bracket (3) is connected with a rubber gasket (6).

7. A positioning device for measuring Kaiser effect according to claim 1, characterized in that: The bottom of the base (1) is bonded to the instrument table (13) by means of adhesive tape.

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