CN204389448U - Damage of rock test acoustic emission test sensor assembly type locating device - Google Patents

Abstract

The utility model discloses an assembled positioning device for an acoustic emission test sensor for rock damage testing, which comprises a frame of the positioning device, a mounting seat for installing the acoustic emission testing sensor, a fixing component for fixing the acoustic emission testing sensor in the mounting seat, and an assembly for installing the acoustic emission testing sensor. The seat is installed on the mounting mechanism of the positioning device frame. The positioning device frame is an assembled structure ring frame, and the ring block is assembled into a whole ring frame through positioning and fixing structural components; the mounting seat is a matching inner cavity and the outer edge of the acoustic emission test sensor. Cylinder structure; the installation mechanism is an installation mechanism that can automatically adjust the position of the mounting seat axially. There are four sets in total, which are located in the same section plane of the positioning device frame. The utility model overcomes the problem that the artificial installation of the test piece in the existing fixing device cannot ensure that the center of the sensor plane is tangent to the cylindrical surface, and the central axis of the sensor emission surface does not coincide with the diameter of the cylindrical test piece, and improves the test efficiency and accuracy. and authenticity.

Description

Acoustic emission test sensor assembled positioning device for rock damage test

technical field

The utility model relates to the technical field of mechanical testing of rock, concrete and other material test pieces, in particular to an acoustic emission test sensor fixing device used in the damage test of rock, concrete and other material test pieces.

Background technique

In the rock mechanics test, when testing the acoustic emission characteristics in the rock damage process, there is no special fixing device for the acoustic emission testing sensor used. At present, the test generally adopts two fixing methods of tape winding or rubber band binding. The diameter of the acoustic emission test sensor is usually between 5mm-15mm. During the test, in order to better couple the acoustic emission test sensor with the tested object, it is usually necessary to use butter or vaseline as a coupling agent and apply it to the end of the acoustic emission test sensor between the plane and the test piece. However, these measures cannot guarantee the parallelism between the end plane of the acoustic emission test sensor and the coupling surface of the test piece and the good coupling with the test piece, especially the irregular shape of the test piece is difficult to fix. Furthermore, couplants such as butter or vaseline can easily lead to a decrease in adhesiveness or failure of the adhesive tape, and during the radial expansion and deformation of the test specimen, the adhesive tape is likely to form a large constraint on the acoustic emission test sensor, increasing the force on it, and even Make it cause some damage; although the rubber band binding is stretched during the radial expansion deformation of the sample, it can be deformed to a certain extent, but this fixing method can easily cause the acoustic emission test sensor to roll over, and it is difficult to ensure that the acoustic emission test sensor is consistent with the tested sensor. good contact with the parts. In addition, the above two fixing methods need to be carried out before the test preload, and cannot be adjusted during the test, and it is extremely difficult to accurately align the acoustic emission test sensor. The above two fixing methods also have the following problems: (1) It is difficult to ensure the consistency of the force of the acoustic emission test sensor in the test of the same batch of test pieces, and it is easy to form more false signals during the test, which is difficult for the analysis of the test results. , Judgment caused great difficulties. (2) It is extremely inconvenient to install other deformation test sensors.

In order to overcome the above problems, the inventor has successively researched and developed an acoustic emission test sensor fixture (ZL200910059594.2) and a universal acoustic emission test sensor fixture (ZL200910059593.8). The basic structures of the two fixtures are: The two bases for installing the acoustic emission test sensors are respectively installed on the free ends of the cantilever rods fixedly connected to the two ends of the connecting rod, and the end surfaces of the two acoustic emission test sensors installed on the free ends of the cantilever rods are parallel to each other. In the use of these two kinds of acoustic emission test sensor fixing devices, the inventor finds that they cannot well solve the problem proposed by the invention. The reason is that during the testing process of the specimen, the deformation of the specimen has been changing from the beginning of loading to the failure of the whole test process. The acoustic emission test sensor at the free end of the two arm bars where the sensor is installed, due to the The connection length of the fixed connection cantilever rod is fixed during the whole test of the specimen, which will cause the end face of the sensor to change from the initial parallel state to the non-parallel "eight sub" state, which will cause the sensor end plane The effectiveness of the coupling between the center and the center of the specimen is reduced, which affects the accuracy of the test. For cylindrical sample specimens, it is difficult to ensure that the position of the sensor is just so that the center of the end face of the sensor passes through the diameter of the specimen, that is, it is difficult to ensure that the contact position between the sensor end plane and the cylindrical specimen cylinder is the exact center of the sensor end plane , and the center of the end face of the sensor is the effective part for signal monitoring. Since the center of the end face of the sensor is not in effective contact with the test piece, the measurement signal is inaccurate, and even the signal cannot be measured. Although the universal acoustic emission test sensor fixture disclosed in ZL200910059593.8 can adjust the direction of the sensor acoustic emission plane, it is still difficult for the test personnel to ensure that the center of the adjusted sensor end plane is in effective contact with the surface of the test piece in actual operation. It is impossible to ensure that the line connecting the centers of the two symmetrical sensor end planes passes through the diameter of the test piece or the center of the section after adjustment, and will cause inconsistencies with the setting positions in the control software, so the success of the test and the reliability of the results cannot be fully guaranteed. Since the position of the sensor is set in the control software, the cylindrical test piece just passes through the diameter of the test piece, and the square test piece just passes through the center of the cross section. The settings are consistent, which leads to inaccurate measured results, which are quite different from the actual ones.

Contents of the invention

Aiming at the deficiencies of the existing acoustic emission test sensor fixing device, the purpose of this utility model is to provide a new structure of acoustic emission test sensor assembly positioning device for rock damage testing, so as to ensure the placement position of the acoustic emission test sensor Make the center direction of the acoustic emission surface of the sensor just pass through the diameter of the circular test piece or the center of the rectangular test piece, and ensure that it is consistent with the position set in the control software, so as to improve the test efficiency, test accuracy and authenticity.

The utility model provides an assembled positioning device for an acoustic emission test sensor for rock damage testing, comprising a positioning device frame, a mounting seat for installing the acoustic emission testing sensor, a fixing component for fixing the acoustic emission testing sensor in the mounting seat, and installing the mounting seat on the The installation mechanism on the frame of the positioning device, the frame of the positioning device is an assembly structure ring frame, which is assembled into a whole ring frame by 2 to 4 ring blocks through the positioning and fixing structure; The cylinder structure matches the edge of the cylinder, and the sensor wiring lead-out gap is designed on the cylinder wall; the installation mechanism is an installation mechanism that can automatically adjust the position of the mounting seat in the axial direction. The two are arranged opposite to each other, and the connecting lines of the two installation positions are perpendicular to each other, so that the connecting line of the center of the two opposite sensor end planes installed on the frame of the positioning device through the mounting seat and the mounting bracket passes through the diameter of the test piece or the center of the cross section of the test piece.

In the above technical solution of the utility model, the frame of the positioning device is preferably designed to be assembled into an integral ring frame by two split ring blocks through a positioning and fixing structure. The positioning and fixing structure includes a positioning and docking structure pair formed by the docking ports of two ring blocks and a fixing structure for fixing the two ring blocks together. The specific structure of the positioning and fixing structure can be designed in various structural forms, as shown in Figure 8-1 to Figure 14-2.

In the above-mentioned technical solution of the present utility model, the frame of the positioning device can be an assembled circular frame or a rectangular frame. For a cylindrical test piece, the frame of the positioning device can be an assembled circular frame or a Assembled rectangular ring frame. For rectangular specimens, the positioning device frame generally adopts an assembled rectangular ring frame.

In the above-mentioned technical solution of the utility model, the fixing assembly can be designed to be composed of an open ring spring piece that hoops the acoustic emission test sensor on the mounting seat and a locking structure that locks the opening of the open ring spring piece , can also be designed into other structural forms. The locking structure may adopt a buckle locking structure, a bolt and nut locking structure or other locking structures.

In the above-mentioned technical solution of the present utility model, as the said cylindrical body of mounting seat, the notch designed on the wall of the cylindrical body is not only used as a notch for sensor wiring to lead out, but also for fixing the acoustic emission test sensor on the The structure in the mounting seat, the notch of the cylinder is also a part of the fixed structure. The notch of the cylinder should not be too large, and the notch angle is generally not greater than 120 degrees.

In the above-mentioned technical solution of the present utility model, the installation mechanism can preferably be designed as follows: comprising a sliding rod fixedly connected with the mounting seat, sleeved outside the sliding rod, one end acts on the mounting seat, and the other end acts on the positioning device frame The spring on the inner wall and the support fixed on the outer wall surface of the positioning device frame, the support is a guide cylinder structure support, fixedly arranged perpendicular to the outer wall surface of the positioning device frame, the inner diameter cooperates with the outer diameter of the sliding rod to form a sliding pair, The sliding rod is axially slidably installed in the guide cylinder through the installation hole on the frame of the positioning device, and the sliding rod protruding outside the guide cylinder is designed with a limit structure for restricting the axial sliding of the sliding rod.

In the above-mentioned installation mechanism, the limit structure that limits the inward sliding position of the slide rod can be designed as a screw nut limit structure composed of threads on the slide rod and matching nuts, or can be designed as a screw nut limit structure composed of threads on the slide rod. The pin hole and the matching pin constitute the pin hole pin limit structure, or other structural forms; the guide cylinder used as the mounting support, and the fixing of the frame wall of the positioning device can be fixed by welding or threaded pairs. Fixed; the way of fixed connection between the sliding rod and the mounting seat of the acoustic emission test sensor can be welded connection or threaded pair connection.

In the above-mentioned technical solution of the present utility model, in order to facilitate the layout of the wiring of the acoustic emission testing sensor, slots for leading the wiring of the acoustic emission testing sensor can be designed on the frame of the positioning device.

The assembled positioning device for acoustic emission testing sensor for rock damage testing provided by the utility model is the acoustic emission testing sensor fixing device (ZL200910059594.2) and the universal acoustic emission testing sensor fixing device (ZL200910059593.8) previously proposed by the inventor. ) in the actual use process, it is found that for cylindrical sample specimens, it is not only difficult to ensure that the fitting part of the sensor and the specimen is the center of the sensor end plane, but also difficult to ensure that the placement position is just so that the end plane center of the sensor passes through the diameter of the specimen. The position of the sensor is set in the control software to have an accurate position, that is, for a cylindrical test piece, it just passes through the diameter of the test piece, and for a square test piece, it just passes through the center of the cross section. Since it is difficult to ensure the installation of the test piece by the fixture, the center position of the sensor end plane It is consistent with the position set in the control program, which leads to inaccurate measured results and large differences from the actual situation.

The utility model provides an assembly-type positioning device for acoustic emission testing sensors for rock damage testing. By installing four pairs of installations in two directions perpendicular to each other on the same sectional plane of the positioning device frame of the overall ring structure, the position of the mounting seat can be automatically adjusted axially. The mechanism not only ensures that the joint between the acoustic emission test sensor installed in the mounting seat and the cylinder surface of the cylindrical specimen is always the center of the end plane of the sensor, but also ensures that the installation position of the sensor is consistent with the position set in the control program, that is, The center of the end plane of the four acoustic emission test sensors installed symmetrically in pairs just passes through the diameter of the cylindrical specimen or the center of the section of the rectangular specimen, which not only can obtain as much measurement information as possible during the test of the same specimen, but also It can ensure that when the test piece is installed and tested, the center position of the sensor end plane is consistent with the position set in the control program, thereby ensuring the test efficiency, test accuracy and authenticity. The fixing device provided by the utility model can not only ensure that the sensor installation position is consistent with the program setting position, but also ensure that the sensor position is always at a predetermined position during the application of the coupling agent, and ensure that the center of the sensor end plane is in a good coupling state with the test piece. The fixer No. ZL200910059594.2 and No. ZL200910059593.8 fixer previously disclosed by the inventor, although the coupling agent can be applied before or after the acoustic emission test sensor is installed on the test piece, strive to make the center of the sensor end plane and the test piece be in the same position. Good coupling state, get accurate and true test information, but whether you apply it before installation or after installation, it can't achieve the wish very well. Applying before installation can neither ensure that the center line of the installed two sensor end planes passes through the diameter of the cylindrical test piece or the center of the rectangular test piece section, nor can it ensure that the position of the sensor and the cylindrical surface of the cylindrical test piece is the sensor The center of the sensor; after installation, it will cause the installation position of the sensor to change during the process of smearing, which will not only make the contact between the sensor and the test piece not the center of the sensor, but also make the two sensors deviate from the predetermined position, which is different from the setting in the control program. Inconsistent. Both methods of smearing will lead to inaccurate test results or ineffective testing.

The installation mechanism specially designed in this utility model is a kind of installation mechanism that can automatically adjust the position of the mounting seat in the axial direction. Keeping close contact with the surface of the test piece also ensures that when the test piece expands radially during the test, the force on the acoustic emission test sensor will not be increased, and at the same time it can ensure that the acoustic emission test sensor is under pressure during the test of the same batch of test specimens. Consistency of force. This not only reduces the impact of false signals on test results, but also improves the service life of the acoustic emission test sensor. In the fixing device previously disclosed by the inventor, since the two parallel cantilever bars that fix the two acoustic emission test sensors are connected together by a connecting rod, when the two acoustic emission testing sensors are installed on the test piece, the connecting rod is located at On one side of the specimen, when the specimen is suddenly broken during the test, the whole composed of the fixture and the two acoustic emission test sensors will swing to the side where the connecting rod is located, and this side may hit the loading frame of the testing machine, causing the sensor to damage or loss of test accuracy. Because the utility model has an integral structure, it is placed outside the test piece during the test. When the test piece breaks suddenly, the fixing device will be suspended in the mid-air of the test, which can avoid hitting the testing machine, thereby protecting the sensor more effectively.

During the testing process of the test piece, the deformation of the test piece has been changing from the beginning of loading to the whole test process of failure. The fixing device disclosed by the inventor, due to the installation of the two arms of the sensor, will change from the initial parallel state , changing to a non-parallel "eight son" state, resulting in a decrease in the effectiveness of the coupling between the center of the sensor end plane and the center of the specimen, affecting the accuracy of the test. The sensor of the utility model is installed on the positioning device frame of the overall rigid ring structure through the mounting seat and the mounting mechanism. During the deformation process of the test piece, the sliding rod fixedly connected with the sensor can be freely expanded and contracted in the guide cylinder as the mounting support. , due to the action of the spring sleeved outside the sliding rod, the test sensor and the tested object are always in the optimal coupling state, which overcomes the above-mentioned defects in the prior art fixing device. The fixing device of the utility model also has the advantages of the fixing device previously disclosed by the inventor (except any adjustment of the universal type).

The test piece is tested by using the acoustic emission test sensor assembled positioning device for rock damage testing provided by the utility model, which can ensure that the center of the end plane of the acoustic emission test sensor passes through the diameter of the test piece or the center of the test piece in the axial direction, and the sensor end plane is in contact with the test piece. The coupling part of the cylindrical surface of the piece is always the center of the sensor end plane, and the four sensors on the same section are always at the same height, which overcomes the fact that the center of the acoustic emission test sensor plane is tangent to the cylindrical surface during the artificial installation of the test piece, and the acoustic emission The problem that the central axis of the test sensor end plane does not coincide with the diameter of the cylindrical specimen to be tested. Simultaneously, the utility model can also always ensure that the end planes of the two acoustic emission test sensors are parallel, and their axial directions are completely coincident.

The utility model provides an assembled positioning device for acoustic emission testing sensors for rock damage testing. Since the device frame of the positioning device is a positioning device frame assembled by two semicircular or rectangular ring blocks through a positioning and fixing structure, it is a A detachable positioning device frame, so the acoustic emission test sensor can be installed before and after the test piece is installed on the testing machine, and different installation methods can be adopted for different test pieces, which improves the test convenience of the test equipment.

Description of drawings

Fig. 1 is a top view structural diagram of an embodiment of the utility model.

Fig. 2 is a front structural schematic view of the fixing device shown in Fig. 1 .

FIG. 3 is a schematic cross-sectional structural schematic diagram of the front view of the fixing device shown in FIG. 1 .

Fig. 4 is a schematic top view of an embodiment of the utility model.

Figure 5-1 is a schematic diagram of the connection relationship between the sensor mounting seat and the sliding rod.

Fig. 5-2 is a top view structural diagram of Fig. 5-1.

Fig. 6 is a structural schematic diagram of a fixing method for fixing the sensor on the mounting base.

Fig. 7 is a structural schematic diagram of another fixing method for fixing the sensor on the mounting base.

Figure 8-1, Figure 8-2 and Figure 8-3 are schematic diagrams of the positioning and fixing structure in the fixing device, where Figure 8-1 is a partial top view of the fixing device, and Figure 8-2 is the right side view of Figure 8-1 Structural schematic diagram, Figure 8-3 is a front view structural schematic diagram of Figure 8-1.

Figure 9-1 and Figure 9-2 are schematic diagrams of the positioning and fixing structure in the fixing device, wherein Figure 9-1 is a partial top view structural diagram of the fixing device, and Figure 9-2 is a front structural schematic diagram of Figure 9-1.

Figure 10-1 and Figure 10-2 are schematic diagrams of the positioning and fixing structure in the fixing device, where Figure 10-1 is a partial top view of the fixing device, and Figure 10-2 is a partially enlarged cross-sectional view of 1 in Figure 10-1 Schematic diagram of the structure.

Figure 11-1 and Figure 11-2 are schematic diagrams of the positioning and fixing structure in the fixing device, in which Figure 11-1 is a partial top view structure diagram of the fixing device, and Figure 11-2 is a partially enlarged cross-sectional assembly of 11 in Figure 11-1 Structural schematic diagram, Figure 11-3 is a right view structural schematic diagram of Figure 11-1.

Figure 12-1 and Figure 12-2 are schematic diagrams of the positioning and fixing structure in the fixing device, in which Figure 12-1 is a partial top view structural diagram of the fixing device, and Figure 12-2 is a partial enlarged structural formula in the A-A direction of Figure 12-1 schematic diagram.

Figure 13-1 and Figure 13-2 are schematic diagrams of the positioning and fixing structure in the fixing device, in which Figure 13-1 is a partial top view structure diagram of the fixing device, and Figure 13-2 is a partial enlarged structural formula in the B-B direction of Figure 13-1 schematic diagram.

Figure 14-1 and Figure 14-2 are schematic diagrams of the positioning and fixing structure in the fixing device, wherein Figure 14-1 is a partial top view structure diagram of the fixing device, and Figure 14-2 is a right view structure diagram of Figure 14-1.

The objects identified by the labels in the above drawings are: 1-positioning device frame; 2-installation support; 3-sliding rod; 4-limit nut; 5-spring; 6-sensor mounting seat; piece; 8- buckle; 9- sensor wiring; 10- sensor wiring external lead groove; 11- acoustic emission test sensor; 12- tested piece, 13- locking bolt; 14- the first connecting ear, 15- the Two connecting lugs; 16-spigot; 17-pin; 18-twist card; 19-centering hole; 20-connecting threaded hole; 21-socket slot; 22-socket plug; 23-first limit Seam; 24-the second limit seam; 25-the first part of the frame body; 26--the second part of the frame body.

Detailed ways

In the following, the assembled positioning device for acoustic emission testing sensors for rock damage testing described in the present invention will be further described through examples and in conjunction with the accompanying drawings. It should be pointed out that the specific implementation of the present invention is not limited to the form described in the examples .

Example 1

The acoustic emission test sensor assembled positioning device for rock damage testing of this embodiment has a structure such as accompanying drawings 1, 2, 3, 5-1, 5-2, 6, 7, 8-1, 8-2 and 8- As shown in 3, the test piece is a cylindrical rock test piece, and the positioning device includes a positioning device frame 1 assembled by two semicircular annular frame bodies through a positioning and fixing structure, and a positioning device frame 1 for installing an acoustic emission test sensor 11. The mounting base 6, the fixing assembly for fixing the acoustic emission test sensor in the mounting base 6, and the mounting mechanism for installing the mounting base 6 on the frame of the positioning device. The positioning and fixing structure is shown in Fig. 8-1, Fig. 8-2 and Fig. 8-3, and its composition includes the first connecting lug 14 and the second connecting lug 15 arranged at the docking port of the two annular blocks. The notch 16 that is provided at the docking port of one ring block is connected to the docking port of the other ring block, and a pin hole is designed on the second connecting lug 15, and a pin hole that matches the pin hole on the first connecting lug 14 is arranged. The pin 17 is the twisted clip 18 that fixes the two connecting lugs together, and the connecting ears on the two semicircular ring blocks are fixed together by the twisted clip, so that the two semicircular ring blocks are assembled Fixture frame in ring configuration. It consists of a socket socket 21 processed at one ring block port and a socket plug 22 processed at the other ring block port, and a socket docking positioning structure pair and fixing bolts that fix the socket socket 21 and the socket plug together. . The mounting seat is a cylinder whose inner cavity matches the outer edge of the acoustic emission test sensor and one end is closed, and the wall of the cylinder body is designed with a sensor wiring lead-out gap, and the angle of the gap is 90 degrees; the acoustic emission test sensor is fixed in the mounting seat 6 The fixing assembly is composed of an open annular spring piece 7 for hooping the acoustic emission test sensor on the mounting seat and a locking structure for locking the opening of the open annular spring piece, and the locking structure is locked by a buckle 8 Structure; the installation mechanism is an installation mechanism that can automatically adjust the position of the mounting seat in the axial direction, including a sliding rod 3 fixedly connected to the bottom end of the cylinder as the acoustic emission test sensor mounting seat 6, sleeved outside the sliding rod, and one end acts The spring 5 acting on the inner wall of the positioning device frame at the bottom end of the cylinder and the other end and the mounting support 2 fixedly arranged on the outer wall surface of the positioning device frame, the mounting support is a guide cylinder support, and is vertically installed and fixed by a thread Outside the frame wall of the positioning device, its inner diameter cooperates with the outer diameter of the sliding rod to form an axial sliding pair. The rod protruding outside the guide cylinder of the mounting support is designed with a limit structure that limits the axial sliding of the slide rod. The limit structure is composed of threads on the slide rod and a limit nut 4 that matches it. Limit the axial sliding position of the sliding rod. There are four installation mechanisms, which are located in the same sectional plane of the positioning device frame, and are arranged in pairs opposite to each other, and the connecting lines of the two installation positions formed by the arrangement of the installation mechanisms in pairs facing each other are perpendicular to each other.

The form of the positioning and fixing structure can also be designed as:

1. The structure of the positioning and fixing structure is shown in Figure 9-1 and Figure 9-2. The difference from the positioning and fixing structure in the above-mentioned embodiment 1 is that the fixed structural parts constituting the positioning and fixing structure are threaded coupling pairs. It consists of a mounting hole on the second connecting lug 15 , a threaded hole 20 on the first connecting lug 14 and a connecting bolt 13 .

2. The structure of the positioning and fixing structure is shown in Figure 10-1 and Figure 10-2, which is composed of a socket slot 21 processed at one ring block port and a socket plug 22 processed at another ring block port The socket butt joint positioning structure pair is composed of fixing bolts that fix the socket socket 21 and the socket plug together.

3. The structure of the positioning and fixing structure is shown in Figure 11-1 and Figure 11-2, which consists of a socket slot 21 processed at one ring block port and a socket plug 22 processed at another ring block port The formed socket and socket docking positioning structure pair, and the locking buckle 8 that fixes the socket socket 21 and the socket plug 22 together.

4. The structure of the positioning and fixing structure is shown in Figure 12-1 and Figure 12-2, which consists of a first limit stop 23 processed at the port of one ring block and a stopper 23 processed at the port of the other ring block. The butt joint structure pair that the second limit stop 24 constitutes, and the first limit stop 23 that constitutes the butt joint structure pair and the second limit stop 24 are fixed together to form the locking bolt 13, so There are three locking bolts 13, located on a straight line. the

5. The structure of the positioning and fixing structure is shown in Figure 13-1 and Figure 13-2, and its composition is basically the same as that of the positioning and fixing structure in 4 above, the difference is that there are two locking bolts 13, Located on a straight line, a positioning pin 17 for positioning the first limit notch 23 and the second limit notch 24 is arranged between the two locking bolts.

6. The structure of the positioning and fixing structure is shown in Figure 14-1 and Figure 14-2. Its composition is basically the same as that of the positioning and fixing structure in the above 5. The difference is that the fixing structure is a buckle 8 and a positioning pin 17 is not in a straight line with the two bayonet sockets.

The method of using the acoustic emission test sensor assembled positioning device for rock damage testing provided by the utility model to test rock specimens:

1. According to the diameter (or side length) of the rock test piece to be tested, and the diameter of the rock test piece to be tested and the amount of deformation that may occur when it is damaged, select an appropriate length of the spring 5 . The four acoustic emission test sensors 11 are respectively fixedly installed in the cylinder as the mounting seat in the fixing device. Adjust the upper limit nut of the sliding rod of the installation mechanism so that the spring 5 sleeved on the sliding rod 3 of the installation mechanism is always in a compressed state during the entire test process of the rock specimen, so as to ensure that the center of the end plane of the acoustic emission test sensor is in line with the rock specimen to be tested. effective surface contact. When adjusting the limit nut 4, it should be noted that the springs on the sliding rods should be compressed in the same amount by the relative installation mechanisms respectively fixing the mounting seats of the acoustic emission test sensors. In addition, when the acoustic emission test sensor after adjusting the position of the limit nut 4 is placed on the tested piece, the limit nut 4 should be between the free end of the sliding screw 3 and the free end of the guide cylinder as the installation support 2 , and cannot be close to the free end of the guide cylinder, this setting is to ensure that during the deformation of the rock specimen, when the rock decreases laterally, that is, when the rock diameter (or side length) decreases, the acoustic emission test The sensors can move toward each other under the action of the spring force; when the rock increases laterally, that is, the diameter (or side length) of the rock increases, the two opposite acoustic emission test sensors will compress the spring under the deformation of the rock and deviate from each other. sports.

2. Fix the lead wires of the acoustic emission test sensor with the adjusted distance and the position of the limit nut respectively in the external lead grooves 10 of the acoustic emission test sensor wiring adjacent to the sensor.

3. Install other test sensors according to the test situation, and then fix the acoustic emission test sensor near the end of the test piece.

4. Place the test piece with the acoustic emission test sensor installed on the testing machine for testing.

After being installed according to the above method, when the test piece expands laterally, the distance between the two opposite test sensor end planes in the device can be slightly changed by the spring 5, and it is close to the surface of the test piece, and always maintained The initial parallel state ensures the accuracy and authenticity of the measurement signal.

Example 2

The structure of the assembled positioning device for acoustic emission testing sensors for rock damage testing in this embodiment is shown in Figures 4 and 7, and the test piece is a rectangular rock test piece. The structure of the positioning device of this embodiment is basically the same as that of the positioning device described in Embodiment 1. The difference is that the frame of the positioning device described in this embodiment is composed of a first part of the frame body 25 and a second part of the frame body 26 is assembled into one rectangular ring-shaped positioning device frame through the positioning and fixing structure; the second is the fixing assembly for fixing the acoustic emission test sensor in the mounting seat 6, wherein the locking structure for locking the opening of the open ring spring piece 7 is Bolt and nut locking structure.

Claims (10)

1. a damage of rock test acoustic emission test sensor assembly type locating device, the installing mechanism comprising locating device framework (1), install the mount pad (6) of acoustic emission test sensor (11), acoustic emission test sensor be fixed on the fixation kit in mount pad and mount pad be installed on locating device framework, it is characterized in that: described locating device framework is package assembly annular frame, be assembled into an integral ring-shaped framework by 2 ~ 4 pieces of ring blocks by positioning and fixing structure; Described mount pad is the tube structure that inner chamber and acoustic emission test sensor outer rim match, and barrel wall is designed with sensor wiring and draws breach; Described installing mechanism be can automatic axial adjustment mount pad position installing mechanism, total fourth officer, be positioned at the same cutting plane of locating device framework, arrange in opposite directions between two, article two, installation site line is mutually vertical, makes the line of two the sensor side planar central be oppositely arranged be installed on locating device framework by mount pad, erecting frame by test specimen diameter or test specimen kernel of section.

2. damage of rock test acoustic emission test sensor assembly type locating device according to claim 1, is characterized in that: described locating device framework is split ring block by 2 pieces and is assembled into an integral ring-shaped framework by positioning and fixing structure.

3. damage of rock test acoustic emission test sensor assembly type locating device according to claim 2, is characterized in that: described positioning and fixing structure is included in the location docking structure pair that two ring block craft port places are formed and the fixed structure piece be fixed together by two ring blocks.

4. damage of rock test acoustic emission test sensor assembly type locating device according to claim 3, is characterized in that: the integral ring-shaped framework of described assembling is annular framework or straight-flanked ring framework.

5. damage of rock test acoustic emission test sensor assembly type locating device according to claim 1, it is characterized in that: as the described cylindrical shell of mount pad, the Notch angle of cylindrical shell is not more than 120 degree.

6. damage of rock test acoustic emission test sensor assembly type locating device according to claim 1, is characterized in that: described fixation kit is formed by the open annular spring leaf (7) put by acoustic emission test sensor hoop on mount pad with by the locking mechanism (8) that open annular spring leaf opening is locked.

7. damage of rock test acoustic emission test sensor assembly type locating device according to claim 6, is characterized in that: described locking mechanism is snap lock structure or bolt and nut locking mechanism.

8. according to the acoustic emission test sensor assembly type locating device of the damage of rock test one of claim 1 to 7 Suo Shu, it is characterized in that: described installing mechanism comprises the sliding bar (3) be fixedly connected with mount pad (6), be nested with outside sliding bar, one end acts on mount pad, the spring (5) that the other end acts on locating device frame inner wall and the bearing (2) be fixedly installed in locating device framework outside wall surface, described bearing is guide cylinder structural bearings, be fixedly installed perpendicular to locating device framework outside wall surface, the major diameter fit of internal diameter and sliding bar forms sliding pair, sliding bar can be arranged in the guide cylinder as bearing through the mounting hole on locating device framework axially slidably, stretch in outside sliding bar and the body of rod outside guide cylinder is designed with limit slippage bar and slides axially position limiting structure.

9. damage of rock test acoustic emission test sensor assembly type locating device according to claim 8, it is characterized in that: limit slippage bar in axial sliding position limiting structure is the bolt and nut position limiting structure be made up of the screw thread on sliding bar and the nut that matches with it, or the pin-and-hole pin position limiting structure be made up of the pin-and-hole on sliding bar and the pin that matches with it.

10. according to the acoustic emission test sensor assembly type locating device of the damage of rock test one of claim 1 to 7 Suo Shu, it is characterized in that: locating device framework is designed with the outer approaching channel hole (10) of acoustic emission test sensor wiring.