CN209069866U - Rock type acoustic emission sensor fixes device - Google Patents

Abstract

The utility model discloses a kind of fixed devices of rock type acoustic emission sensor, including the fixed sleeving for built-in rock type test specimen, 2n spiral guide slot is evenly equipped on fixed sleeving, wherein n is positive integer, several positioning decks radially arranged along fixed sleeving are connected in spiral guide slot, positioning deck, the spiral on fixed sleeving is mobile by spiral guide slot, sensor installation sleeve is connected in positioning deck internal screw thread, sensor installation sleeve is moved radially on fixed sleeving by positioning deck, several positioning rings are threaded on the outer wall of fixed sleeving, it positions deck and is clamped in axial restraint on fixed sleeving by two positioning rings.Even if the utility model, will not there is a situation where injury and equipment in the unexpected explosion because rock type test specimen occurs under high pressure；Realize the installation of positioning deck, sensor installation sleeve and sensor different height and different circumferential positions on fixed sleeving, versatility is stronger；Sensor is bonded closely with test specimen.

Description

Rock type acoustic emission sensor fixes device

Technical field

The utility model belongs to mineral engineering rock mass mechanics acoustic emission testing technology field more particularly to a kind of rock type sound Emission sensor fixes device.

Background technique

Rock material can undergo complicated stress to add in all kinds of geotechnical engineerings and unload as a kind of special engineering medium Load effect, when external force reaches certain limit, rock interior will germinate new crackle, with the load of external force, these new crackles and Original Cracks in rock, which will generate, to be extended and penetrates through, and then will cause geotechnical engineering geological disaster.Thus study of rocks is being answered Rupture process under power effect is to understanding geotechnical engineering failure mechanism and guiding construction great significance for design.

In rupture process, the strain energy of rupture location is able to abrupt release and generates elastic wave rock, i.e., sending sound is sent out Penetrate information.Acoustic emission sensor by being arranged in different location can capture acoustic emission signal when rock rupture, by anti- Algorithm can determine the position ruptured in rock sample, so as to obtain rock damage development process under stress.In rock In stone uniaxial compression acoustic emission monitor(ing), acoustic emission sensor is usually directly fixed on rock surface by rubber band or adhesive tape, Since the potsherd of acoustic emission sensor front end is a flat surface, and rock sample is usually cylinder, therefore sensor and rock sample connect Contacting surface accumulates very little, when rock sample deformation is larger, often leads to acoustic emission sensor and is detached from rock sample, lead to the failure of an experiment.

To solve the above problems, Authorization Notice No. is the Chinese patent of CN204740234U, a kind of rock core sound hair is disclosed The sensor stationary fixture of experiment is penetrated, it mainly includes toroidal race, sensor fixed frame, spring, upper bottom race connecting rod, sensing Device fixed frame is fixed on toroidal race, and upper bottom race connecting rod assembly is consolidated with two toroidal races, sensor is fixed in sensor Determine to come into full contact with core sample and generate frictional force under the action of the spring on frame to achieve the purpose that clamping.Although above-mentioned fixture Sensor can be preferably fixed, but still is had the following problems:

1, under high pressure, the buffer action of toroidal race is smaller, rock type test specimen bursts suddenly penetrate toroidal race between Gap and the case where injury and equipment not can avoid.

2, the installation site of sensor can not can only freely change depending on the design of toroidal race, should not carry out more The test of range；The toroidal race that different rock type test specimens needs mating height different with diameter, versatility are small.

3, sensor is controlled by spring and is coupled with rock type test specimen, is deformed after needing certain stress and not impaired Activity space, control difficulty is larger, the phenomenon that coupling not in place or damage test specimen easily occurs, seriously affects three dimension location Testing result.

Utility model content

The purpose of this utility model is that in view of the deficiencies of the prior art, provide it is a kind of versatile, it is highly-safe, Contact the fixed device of the more controllable rock type acoustic emission sensor of effect.

The utility model provides a kind of fixed device of rock type acoustic emission sensor, including is used for built-in rock type test specimen Fixed sleeving, 2 are evenly equipped on fixed sleevingⁿSpiral guide slot, wherein n is positive integer, is clamped in spiral guide slot There are several positioning decks radially arranged along fixed sleeving, positioning deck by spiral guide slot move by the spiral on fixed sleeving It is dynamic, it is connected with sensor installation sleeve in positioning deck internal screw thread, sensor installation sleeve is by positioning deck in fixed sleeving On move radially, be threaded with several positioning rings on the outer wall of fixed sleeving, positioning deck is clamped in solid by two positioning rings Determine axial restraint on casing.

The laying feature occupied to meet sensor same plane opposition, the spiral guide slot have two, two spirals Guide groove is arranged symmetrically along fixed sleeving eccentric axial.

To keep the versatility of the utility model stronger, inner liner circle is set in the sensor installation sleeve.

For convenience of the disassembly of sensor, the sensor installation sleeve includes cylinder and bumping post, and cylinder screw is connected to fixed In the deck of position, liner washer is mounted on for being tightly fastened sensor in barrel front end section, and bumping post is fixed in cylinder back-end section It is skidded off for obstructing sensor from cylinder back-end.

To keep the practicability of the utility model stronger, the recess convenient for screwdriver insertion is equipped in the cylinder back-end.

To keep the practicability of the utility model stronger, the cross section of the cylinder back-end section inner wall is in regular polygon.

The positioning deck includes cylinder base and the snap-arms for being arranged symmetrically in cylinder base inner end two sides, sensor installation sleeve spiral shell Line is connected in positioning deck, and the cross section of snap-arms is in the c shape consistent with spiral guide slot.

To keep the clamping for positioning deck more stable, the width of the snap-arms and the diameter of cylinder base are identical.

Compared with prior art, the utility model has the advantage that

1, it is realized built in rock type test specimen by fixed sleeving, even if because rock type test specimen occurs under high pressure Explosion suddenly, will not there is a situation where injury and equipment.

2, by the way that spiral guide slot is arranged on fixed sleeving, sliding card of the positioning deck in spiral guide slot is utilized It connects, using the clamping action of two positioning rings, realizes that positioning deck, sensor installation sleeve and sensor are different on fixed sleeving The installation of height and different circumferential position, when sensor on vertical direction and cylinder specimen material periphery all directions according to setting When the sensor position of meter is stable and coupling is complete, the influence error for theoretic time-of-arrival loaction will reduce, and just can Reach and collapse state in rock material test specimen is accurately detected and positioned, versatility is stronger.

3, by the threaded connection of sensor installation sleeve and positioning deck, sensor installation sleeve is adjusted in fixed sleeving On radial position, artificial control is stronger, test specimen destruction before, sensor can all refer on rock type test specimen vertical direction At fixed position and it is in stable state, sensor and the test specimen place of being bonded to each other are close enough, couple appropriateness movement mistake Position.

The utility model structure is simple, easy to use, transfers flexibly, precision is firm, and angle adjustable range is wide, three-dimensional space Detection and localization is more acurrate.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of the utility model.

Fig. 2 is schematic cross-sectional view at A-A in Fig. 1.

Fig. 3 is the broken section structural schematic diagram of right view in Fig. 1.

Label and corresponding component name shown in figure are as follows:

1, fixed sleeving；11, spiral guide slot；

2, deck is positioned；21, cylinder base；22, snap-arms；

3, sensor installation sleeve；31, cylinder；32, bumping post；311, recess；

4, positioning ring；

5, liner washer；

6, sensor.

Specific embodiment

It can be seen that the fixed device of this rock type acoustic emission sensor of the utility model, including fixation from Fig. 1 to Fig. 3 Casing 1, positioning deck 2, sensor installation sleeve 3, positioning ring 4, liner washer 5 and sensor 6,

It is equipped with the external screw thread of perforation on 1 outer wall of fixed sleeving, is uniformly provided with 2 in 1 side wall of fixed sleevingⁿSpiral is led To slot 11, wherein n is positive integer, and each spiral guide slot 11 is curved along 1 height extending direction disk of fixed sleeving, each spiral guide slot 11 Rotation direction is identical with helical angle,

Positioning deck 2 includes cylinder base 21 and two snap-arms 22, is equipped with the internal screw thread of perforation, snap-arms 22 in 21 inner wall of cylinder base 21 inner end two sides of cylinder base are arranged symmetrically in, the width of snap-arms 21 is identical as the diameter of cylinder base 21, and the cross section of snap-arms 22 is in The c shape consistent with spiral guide slot 11, cylinder base 21 are connected in spiral guide slot 11 by 22 activity of snap-arms, 21 edge of cylinder base The radial arrangement of fixed sleeving 1, by snap-arms 22, along spiral guide slot 11, the spiral on fixed sleeving 1 moves cylinder base 21,

Sensor installation sleeve 3 includes cylinder 31 and bumping post 32, is equipped with and 21 inner wall phase of cylinder base on 31 outer wall of cylinder The external screw thread matched, cylinder 31 are threaded in the cylinder base 21 of positioning deck 2, and cylinder 31 is by cylinder base 21 on fixed sleeving 1 It moves radially, bumping post 22 is fixed in 21 rear end section of cylinder along 31 radial direction of cylinder, is equipped in 21 rear end of cylinder and is inserted convenient for screwdriver The recess 311 entered,

The internal screw thread to match with 1 outer wall of fixed sleeving is equipped on 4 inner wall of positioning ring, positioning ring 4 is threaded in solid Determine outside casing 1, two positioning rings 4 move toward one another, the cylinder base 21 and snap-arms 22 of upper and lower clamping position deck 2, control sensor peace Sleeved 3 axially position on fixed sleeving 1,

Liner washer 5 is sleeved in the front end rigion of cylinder 31 of sensor installation sleeve 3,

Sensor 6 is installed tightly in the front end rigion of cylinder 31 by liner washer 5, the rear end face and bumping post of sensor 6 32 connect, and sensor 6 is not skidded off by the barrier of bumping post 32 from 31 rear end of cylinder.

The spiral guide slot 11 that can be seen that the utility model from Fig. 1 and Fig. 3 has two, two 11 edges of spiral guide slot 1 eccentric axial of fixed sleeving is arranged symmetrically.

In the present invention, the cross section of 31 rear end section inner wall of cylinder is in regular polygon, generally uses regular hexagon.

When being tested, the utility model use process is as follows:

1, rock type test specimen is placed in fixed sleeving 1；

2, according to the height of rock type test specimen, by snap-arms 22, fixing sleeve is preset at what positioning deck 2 opposed two-by-two In the spiral guide slot 11 of pipe 1；

3, it is screwed roughly respectively using a pair of of positioning ring 4 to the upper and lower position of positioning deck 2, according still further to designed sensing Device placement location parameter fine adjustment causes the axial position on the fixed sleeving 1 for tightly making to position deck 2 to determine；

4, according to experiment needs, the sensor 6 of 2-6 suitable models is chosen, 6 internal diameter selectable range of sensor is 4mm- 20mm selects the liner washer 5 of different-thickness, sensor 6 is installed tightly in the front end rigion of cylinder 31；

5, by the tip merging recess 311 of screwdriver, cylinder 31 is screwed in cylinder base 21, makes sensor using screw thread 6 press to rock type test specimen, are in close contact sensor 6 with rock type test specimen and pass through other reagents to be allowed to sufficiently couple.

Using the utility model, testing crew can preferably be controlled in such acoustic emission experiment sensor position and The degree of coupling of sensor and test specimen is flexibly transferred position of the sensor around test specimen, can be carried out according to the diversity of design More abundant acoustic emission detection test.

Claims (8)

1. a kind of fixed device of rock type acoustic emission sensor, it is characterised in that: including the fixation for built-in rock type test specimen Casing (1) is evenly equipped with 2n spiral guide slot (11) on fixed sleeving, and wherein n is positive integer, is clamped in spiral guide slot There are several positioning decks (2) radially arranged along fixed sleeving, positioning deck passes through spiral guide slot spiral on fixed sleeving It is mobile, it is connected with sensor installation sleeve (3) in positioning deck internal screw thread, sensor installation sleeve is by positioning deck in fixation It moves radially, is threaded on the outer wall of fixed sleeving several positioning rings (4) on casing, positioning deck is pressed from both sides by two positioning rings Hold the axial restraint on fixed sleeving.

2. the fixed device of rock type acoustic emission sensor according to claim 1, it is characterised in that: the spiral guide slot There are two, two spiral guide slots are arranged symmetrically along fixed sleeving eccentric axial.

3. the fixed device of rock type acoustic emission sensor according to claim 1, it is characterised in that: pacify in the sensor Inner liner circle (5) are set in sleeved.

4. the fixed device of rock type acoustic emission sensor according to claim 3, it is characterised in that: the sensor installation Sleeve includes cylinder (31) and bumping post (32), and cylinder screw is connected in positioning deck, and liner washer is mounted on barrel front end section Interior to be used to be tightly fastened sensor, bumping post is fixed in cylinder back-end section and skids off for obstructing sensor from cylinder back-end.

5. the fixed device of rock type acoustic emission sensor according to claim 4, it is characterised in that: in the cylinder back-end Equipped with the recess (311) convenient for screwdriver insertion.

6. the fixed device of rock type acoustic emission sensor according to claim 4, it is characterised in that: the cylinder back-end section The cross section of inner wall is in regular polygon.

7. the fixed device of rock type acoustic emission sensor according to claim 1, it is characterised in that: the positioning deck packet The snap-arms (22) for including cylinder base (21) and being arranged symmetrically in cylinder base inner end two sides, sensor installation sleeve are threaded in positioning card In seat, the cross section of snap-arms is in the c shape consistent with spiral guide slot.

8. the fixed device of rock type acoustic emission sensor according to claim 7, it is characterised in that: the width of the snap-arms It spends identical as the diameter of cylinder base.