CN104483184A - Pressing-drawing conversion device for monitoring sound emission of concrete test piece and construction method of pressing-drawing conversion device - Google Patents
Pressing-drawing conversion device for monitoring sound emission of concrete test piece and construction method of pressing-drawing conversion device Download PDFInfo
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- CN104483184A CN104483184A CN201410777673.8A CN201410777673A CN104483184A CN 104483184 A CN104483184 A CN 104483184A CN 201410777673 A CN201410777673 A CN 201410777673A CN 104483184 A CN104483184 A CN 104483184A
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Abstract
The invention discloses a pressing-drawing conversion device for monitoring the sound emission of a concrete test piece. The pressing-drawing conversion device comprises an upper force applying plate, an upper bearing plate, a lower force applying plate and a lower bearing plate which are in same size and shape and sequentially arranged from top to bottom, wherein the upper force applying plate and the lower force applying plate are fixedly connected through a plurality of first supporting upright pillars, the first supporting upright pillars are arranged in parallel and penetrate through the upper bearing plate, and the upper force applying plate, the lower force applying plate and the first supporting upright pillars form a force applying framework; the upper bearing plate and the lower bearing plate are fixedly connected through a plurality of second supporting upright pillars, the second supporting upright pillars penetrate through the lower force applying plate, and the upper bearing plate, the lower bearing plate and the second force applying upright pillars form a bearing framework. By virtue of a bar system counterforce structure, the force transfer is simple and definite, the whole pressing-drawing conversion device is convenient to mount and detach, and a single-axis tensile experiment of the test piece can be achieved on a press machine.
Description
Technical field
The application relates to concrete sample tension test technical field, and particularly a kind of pressure for concrete sample acoustic emission monitor(ing) draws conversion equipment.
Background technology
Pressure testing machine is mainly used in the compressive strength of testing the building materials test specimens such as concrete, cement, engineering brick, fire resistive material, also can be used for the compressive strength test of other nonmetallic materials.The small-size laboratory of building industry is mostly furnished with concrete pressure machine but puller system is less.If strength test can be carried out simply and easily on existing pressing machine basis, then also can carry out the test of concrete sample tensile strength at small-size laboratory.
Method at present for concrete in tension experiment has uniaxial direct tensile method and is indirectly subject to daraf(reciprocal of farad), in laboratory, adopt is subject to daraf(reciprocal of farad) indirectly, i.e. split the law, but split the law mainly exists some problem following: 1. can occur stress concentration phenomenon at load(ing) point in experimentation, concrete actual performance is detected and there is certain influence.2. the Tensile strength data recorded is less than normal, and discreteness and variability are all larger.3. the roughness of surface of test piece inevitably makes discontinuity.Therefore, we need to seek a kind of pressure and draw conversion equipment, make the axial pressure load conversion applied become tension load, thus greatly improve the degree of accuracy of test.
Nowadays existing pressure-La transition experiment device is mostly sleeve pattern, inevitably there is some problem following: 1. in experimentation because the friction of device junction can produce larger noise, interference is produced to acoustic emission signal, affects the accuracy of acoustic emission detection; 2. the device of form of sleeve makes test specimen not expose, its fully closed feature, and device is not had can the space of fixed sound emission sensor.
The application's patent is conceived to above 2 problems, researches and develops device, and application creates the pressure that can be used for concrete sample damage acoustic emission monitor(ing) and draws conversion equipment.
Summary of the invention
The technical matters that the application will solve is for above-mentioned the deficiencies in the prior art, and provide a kind of pressure for concrete sample acoustic emission monitor(ing) to draw conversion equipment and construction method thereof, this application of installation to existing pressure testing machine can will do the tension test of concrete sample.
For solving the problems of the technologies described above, the technical scheme that the application adopts is:
A kind of pressure for concrete sample acoustic emission monitor(ing) draws conversion equipment, comprise upper gusset, upper force bearing plate, lower gusset, lower force bearing plate that the size shape that sets gradually is all identical from top to bottom, the first supporting upright post arranged by comprise several parallel between upper gusset with lower gusset is fixedly connected with, first supporting upright post runs through force bearing plate, and upper and lower gusset and the first supporting upright post form stress application frame jointly; The second supporting upright post arranged by comprise several parallel between upper force bearing plate with lower force bearing plate is fixedly connected with, and the second supporting upright post runs through lower gusset, and upper and lower force bearing plate and the second supporting upright post form load-bearing frame jointly; First, second supporting upright post described is all perpendicular to upper and lower gusset and upper and lower force bearing plate; Removablely to coordinate for upper and lower between stress application frame with load-bearing frame; Arrange a pair fixed block for placing concrete sample between upper force bearing plate, lower gusset, one of them fixed block is arranged at the center position of lower gusset upper surface, and another fixed block is arranged at the center position of force bearing plate lower surface.
Described upper force bearing plate is offered the first mounting hole for running through the first supporting upright post, the diameter of this first mounting hole is greater than the diameter of the first supporting upright post; Lower gusset is offered the second mounting hole for running through the second supporting upright post, the diameter of this second mounting hole is greater than the diameter of the second supporting upright post.
The height of described first supporting upright post is identical with diameter with the height of the second supporting upright post with diameter, and first and second supporting upright post is slender cylinder.
Also comprise centralizer, centralizer, for the center centering of the axis and the first mounting hole that make the first supporting upright post, makes the axis of the second supporting upright post and the center centering of the second mounting hole.
The described pressure for concrete sample acoustic emission monitor(ing) draws conversion equipment, also comprises the fixture adding and be held on gusset on bottom surface, the U-shaped structure of fixture.
The fixed block be arranged on lower gusset is bolted; The fixed block be arranged on force bearing plate is fixed by centring screw bolt.
Pressure for concrete sample acoustic emission monitor(ing) draws a construction method for conversion equipment, comprises the following steps:
The first step, draws conversion equipment to be positioned over pressure experiment machine operating platform for doing acoustic emission monitor(ing) to concrete sample by the pressure for concrete sample acoustic emission monitor(ing), by the pressure head of testing machine and upper gusset tentatively simply fixing by fixture;
Second step, places concrete sample between a pair fixed block;
3rd step, places centralizer in first and second mounting hole, ensures the axis of the first supporting upright post and the center centering of the first mounting hole, make the axis of the second supporting upright post and the center centering of the second mounting hole;
4th step, the relative position of adjustment pressure head and upper gusset, is completely fixed fixture, concrete sample is firmly added and is held between a pair fixed block;
5th step, takes out centralizer, starts test.
After the application adopts said structure, there is following technique effect:
The application adopts leverage counterforce structure, and power transmission is simply clear and definite, and the loading, unloading of whole device peace are convenient, and pressing machine can realize the uniaxial direct tension experiment of test specimen.
Concrete sample is held between upper force bearing plate and lower gusset, the interference that loading system and the relative isolation of test specimen are greatly reduced mechanical noise that pilot system produces gathers acoustic emission signal.Leave space between the reaction frame of the application, avoid due to the noise problem producing sliding friction that contacts with each other, adopt multiple rounding bench-type centralizer, make installation process more quick, axle center centering is more accurate, and without the need to repeating centering.
Compared with drawing conversion equipment test specimen with traditional socket type pressure, leg-of-mutton member structure, while not reducing device job stability, solves the problem of installing calibrate AE sensor on test specimen.The application can alleviate the labour intensity of adjustment dismounting in the laboratory of concrete sample in a large amount of test repeatedly, be convenient to dismounting, be convenient to recycling, time saving and energy saving, easy and simple to handle.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present application or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the application, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 shows the application and is not applying the structural representation under pressure state;
The structural representation of upper force bearing plate in Fig. 2 local repressentation Fig. 1;
Fig. 3 shows the structural representation of centralizer described in the application;
Wherein have: 1. load-bearing frame; 2. stress application frame; 3. fixed block; 4. bolt; 5. centring screw bolt; 6. centralizer; 7. fixture.
Embodiment
For making the object of the application and technical scheme clearly, be clearly and completely described below in conjunction with the technical scheme of the embodiment of the present application to the application.Obviously, described embodiment is a part of embodiment of the application, instead of whole embodiments.Based on the embodiment of described the application, the every other embodiment that those of ordinary skill in the art obtain under without the need to the prerequisite of creative work, all belongs to the scope of the application's protection.
As shown in Figure 1, a kind of pressure for concrete sample acoustic emission monitor(ing) draws conversion equipment, comprise upper gusset, upper force bearing plate, lower gusset, lower force bearing plate that the size shape that sets gradually is all identical from top to bottom, the first supporting upright post arranged by comprise several parallel between upper gusset with lower gusset is fixedly connected with, first supporting upright post runs through force bearing plate, and upper and lower gusset and the first supporting upright post form stress application frame 2 jointly; The second supporting upright post arranged by comprise several parallel between upper force bearing plate with lower force bearing plate is fixedly connected with, and the second supporting upright post runs through lower gusset, and upper and lower force bearing plate and the second supporting upright post form load-bearing frame 1 jointly; Described first supporting upright post, the second supporting upright post are all perpendicular to upper gusset, lower gusset and upper force bearing plate, lower force bearing plate; Removablely to coordinate for upper and lower between stress application frame 2 with load-bearing frame 1; Arrange a pair fixed block 3 for placing concrete sample between upper force bearing plate, lower gusset, one of them fixed block 3 is arranged at the center position of lower gusset upper surface, and another fixed block 3 is arranged at the center position of force bearing plate lower surface.
The fixed block 3 be arranged on lower gusset is fixed by bolt 4; The fixed block 3 be arranged on force bearing plate is fixed by centring screw bolt 5, and before device work, centring screw bolt 5 is in relaxed state, facilitates centering; When device works, centring screw bolt 5 and plate extrude mutually, are in tightening state.
Force bearing plate is offered for the above the first mounting hole for running through the first supporting upright post, the diameter of this first mounting hole is greater than the diameter of the first supporting upright post; Lower gusset is offered the second mounting hole for running through the second supporting upright post, the diameter of this second mounting hole is greater than the diameter of the second supporting upright post.
The height of described first supporting upright post is identical with diameter with the height of the second supporting upright post with diameter, and first and second supporting upright post is slender cylinder.
As shown in Figure 2, an embodiment being preferably six roots of sensation supporting upright post is provided in the application, load-bearing frame 1, stress application frame 2 include three supporting upright posts, three first supporting upright posts of stress application frame 2 are three summit distributions of isosceles triangle, three the summit distributions of three second supporting upright posts also in isosceles triangle of load-bearing frame 1, isosceles triangle summit on lower force bearing plate is in the center on the base of the isosceles triangle of gusset, and the summit of the isosceles triangle of gusset is in the center on the isosceles triangle base on lower force bearing plate.Compared with drawing conversion equipment test specimen with traditional socket type pressure, leg-of-mutton member structure, while not reducing device job stability, solves the problem of installing calibrate AE sensor on test specimen.
As shown in Figure 2, the application also comprises centralizer 6, and centralizer 6, for the center centering of the axis and the first mounting hole that make the first supporting upright post, makes the axis of the second supporting upright post and the center centering of the second mounting hole.
As shown in Figure 3, described centralizer 6 in reverse frustoconic, upper end be 120 degree fan-shaped, two centralizers 6 are placed on the gap that first and second mounting hole and first and second supporting upright post are formed after concrete sample installs.
As shown in Figure 1, the application is used for the pressure of concrete sample acoustic emission monitor(ing) and draws conversion equipment also to comprise to add the fixture 7 be held on gusset on bottom surface, the U-shaped structure of fixture 7.
Device materials suggestion described in the application uses low noise damping steel plate, and the noise produced when reducing device work is to the interference of the acoustical signal that acoustic emission is collected.
The pressure that disclosed herein as well is for concrete sample acoustic emission monitor(ing) draws the construction method of conversion equipment, comprises the following steps:
The first step, draws conversion equipment to be positioned over pressure experiment machine operating platform for doing acoustic emission monitor(ing) to concrete sample by the pressure for concrete sample acoustic emission monitor(ing), by the pressure head of testing machine and upper gusset preliminary simple fixing by fixture 7;
Second step, places concrete sample between a pair fixed block 3;
3rd step, places centralizer 6 in first and second mounting hole, ensures the axis of the first supporting upright post and the center centering of the first mounting hole, make the axis of the second supporting upright post and the center centering of the second mounting hole;
4th step, the relative position of adjustment pressure head and upper gusset, is completely fixed fixture 7, concrete sample is firmly added and is held between a pair fixed block 3;
5th step, takes out centralizer 6, starts test.
After having tested, with spanner, centring screw bolt 5 is unclamped, take out test specimen.
Upper and lower gusset in the application; overlying relation in upper and lower force bearing plate is not absolute; mainly name for whole device Impact direction; illustrational in the application is that device is subject to downward pressure; so name from relation that is afterburning, load; in order to meet different experiments needs, can also convert, belonging to the protection domain of the application equally.
Those skilled in the art of the present technique are appreciated that unless otherwise defined, and all terms used herein (comprising technical term and scientific terminology) have the meaning identical with the general understanding of the those of ordinary skill in field belonging to the application.Should also be understood that those terms defined in such as general dictionary should be understood to have the meaning consistent with the meaning in the context of prior art, unless and define as here, can not explain by idealized or too formal implication.
The implication of the "and/or" described in the application refers to respective individualism or both simultaneous situations include interior.
The implication of " inside and outside " described in the application refers to relative to equipment itself, in the direction of sensing equipment inside is, otherwise is outward.
When the implication of " left and right " described in the application refers to reader just to accompanying drawing, the left side of reader is a left side, and the right of reader is the right side.
The indirect connection that can be the direct connection between parts also can be by other parts between parts of the implication of " connection " described in the application.
Claims (7)
1. one kind is drawn conversion equipment for the pressure of concrete sample acoustic emission monitor(ing), it is characterized in that, comprise upper gusset, upper force bearing plate, lower gusset, lower force bearing plate that the size shape that sets gradually is all identical from top to bottom, the first supporting upright post arranged by comprise several parallel between upper gusset with lower gusset is fixedly connected with, first supporting upright post runs through force bearing plate, and upper and lower gusset and the first supporting upright post form stress application frame (2) jointly; The second supporting upright post arranged by comprise several parallel between upper force bearing plate with lower force bearing plate is fixedly connected with, and the second supporting upright post runs through lower gusset, and upper and lower force bearing plate and the second supporting upright post form load-bearing frame (1) jointly; First, second supporting upright post described is all perpendicular to upper and lower gusset and upper and lower force bearing plate; Removablely to coordinate for upper and lower between stress application frame (2) with load-bearing frame (1); A pair fixed block (3) for placing concrete sample is set between upper force bearing plate, lower gusset, one of them fixed block (3) is arranged at the center position of lower gusset upper surface, and another fixed block (3) is arranged at the center position of force bearing plate lower surface.
2. the pressure for concrete sample acoustic emission monitor(ing) according to claim 1 draws conversion equipment, it is characterized in that, described upper force bearing plate is offered the first mounting hole for running through the first supporting upright post, the diameter of this first mounting hole is greater than the diameter of the first supporting upright post; Lower gusset is offered the second mounting hole for running through the second supporting upright post, the diameter of this second mounting hole is greater than the diameter of the second supporting upright post.
3. the pressure for concrete sample acoustic emission monitor(ing) according to claim 2 draws conversion equipment, it is characterized in that, also comprise centralizer (6), centralizer (6), for the center centering of the axis and the first mounting hole that make the first supporting upright post, makes the axis of the second supporting upright post and the center centering of the second mounting hole.
4. the pressure for concrete sample acoustic emission monitor(ing) according to claim 1 draws conversion equipment, it is characterized in that, the height of described first supporting upright post is identical with diameter with the height of the second supporting upright post with diameter, and first and second supporting upright post is slender cylinder.
5. the pressure for concrete sample acoustic emission monitor(ing) according to claim 1 draws conversion equipment, it is characterized in that, also comprises the fixture (7) adding and be held on gusset on bottom surface, fixture (7) U-shaped structure.
6. the pressure for concrete sample acoustic emission monitor(ing) according to claim 1 draws conversion equipment, it is characterized in that, the fixed block (3) be arranged on lower gusset is fixed by bolt (4); The fixed block (3) be arranged on force bearing plate is fixed by centring screw bolt (5).
7. the pressure for concrete sample acoustic emission monitor(ing) as claimed in claim 1 draws a construction method for conversion equipment, it is characterized in that, comprises the following steps:
The first step, draws conversion equipment to be positioned over pressure experiment machine operating platform for doing acoustic emission monitor(ing) to concrete sample by the pressure for concrete sample acoustic emission monitor(ing), by the pressure head of testing machine and upper gusset preliminary simple fixing by fixture (7);
Second step, places concrete sample between a pair fixed block (3);
3rd step, places centralizer (6) in first and second mounting hole, ensures the axis of the first supporting upright post and the center centering of the first mounting hole, make the axis of the second supporting upright post and the center centering of the second mounting hole;
4th step, the relative position of adjustment pressure head and upper gusset, is completely fixed fixture (7), concrete sample is firmly added and is held between a pair fixed block (3);
5th step, takes out centralizer (6), starts test.
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| CN201410777673.8A CN104483184A (en) | 2014-12-15 | 2014-12-15 | Pressing-drawing conversion device for monitoring sound emission of concrete test piece and construction method of pressing-drawing conversion device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410777673.8A CN104483184A (en) | 2014-12-15 | 2014-12-15 | Pressing-drawing conversion device for monitoring sound emission of concrete test piece and construction method of pressing-drawing conversion device |
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Cited By (6)
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| CN106986047A (en) * | 2017-03-23 | 2017-07-28 | 西安飞机工业（集团）有限责任公司 | A kind of stryctyrak test load tension and compression conversion equipment |
| CN107727503A (en) * | 2017-11-15 | 2018-02-23 | 中国人民解放军陆军工程大学 | Adhesion-free test device and method for direct rock tensile test |
| CN108693032A (en) * | 2018-04-24 | 2018-10-23 | 西北工业大学 | A kind of plank compression performance test sample, fixture and method |
| CN110320106A (en) * | 2019-08-12 | 2019-10-11 | 山西煤矿机械制造股份有限公司 | A kind of dumbbell pin factory strength test device |
| CN111208011A (en) * | 2020-02-26 | 2020-05-29 | 王琰 | Coal ash evaporates presses aerated concrete block intensity detection device |
| CN113125255A (en) * | 2021-03-22 | 2021-07-16 | 株洲时代新材料科技股份有限公司 | Device and method for testing tensile fatigue of embedded part of blade root of wind power blade |
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Application publication date: 20150401 |