CN204495660U - A kind of concrete lever tension and compression creep equipment with quiet pulley - Google Patents
A kind of concrete lever tension and compression creep equipment with quiet pulley Download PDFInfo
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- CN204495660U CN204495660U CN201520178038.8U CN201520178038U CN204495660U CN 204495660 U CN204495660 U CN 204495660U CN 201520178038 U CN201520178038 U CN 201520178038U CN 204495660 U CN204495660 U CN 204495660U
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Abstract
With a concrete lever tension and compression creep equipment for quiet pulley, be made up of bracing or strutting arrangement, charger and test specimen coupling arrangement; This concrete lever tension and compression creep equipment adopts dual lever mechanism to realize stretching and pressurization; Advantageous Effects of the present utility model is: structure is simple, reliable, and can apply lasting, constant load to test specimen, floor area is little, and set of device just can provide tension test and compression test two kinds of test functions.
Description
Technical field
The utility model relates to a kind of experiment loading unit, particularly relates to a kind of concrete lever tension and compression creep equipment with quiet pulley.
Background technology
Under concrete creep refers to the effect of construction long-term stress, it strains the phenomenon of sustainable growth in time, the generation of creeping often causes the stress of concrete structure or component that larger change occurs, structural internal force is caused to change, damages of concrete structures may be made to ftracture, structural failure can be caused time serious, therefore, carry out creep test to concrete component, understanding its long-term time variation can be very necessary.
Concrete creep test device generally comprises charger, stable-pressure device, measuring instrument and temperature and humidity control device, in prior art, common concrete creep test device is generally divided into four classes: spring, lever, spring lever formula and fluid pressure type.
Spring creep equipment loads by lifting jack, relies on counter spring force to carry out the constant of sustained loading; It has, and floor area is little, volume is little, add the advantages such as carried convenient, is that China applies maximum chargers at present; But due to concrete creep and shrink the relative displacement caused load can be caused to reduce gradually, add spring itself and there is stress relaxation characteristics, in order to ensure that load is constant, need frequently to adjust load and device in process of the test, troublesome poeration, voltage regulation result are poor, in addition, the loading tonnage of spring creep equipment is limited, generally below 30 tons.
Lever creep equipment utilizes lever principle, and by hanging weight load application, its structure is simple, easy to operate, and maximum advantage is can keep load continual and steady, but due to floor area large, loading amount is less, seldom adopts in engineering field; In prior art, in order to reduce the floor area of lever creep equipment and increase its loading amount, those skilled in the art have also done some and have benefited our pursuits, as two sections of documents that publication number is CN103335897A and CN104034596A, but their structure all slightly complicated, and all can only realize Uniaxial Compression or a kind of load mode of unilateral stretching.
Spring lever formula creep equipment is that to utilize spring to carry out sustained loading constant, utilize again lever principle to improve loading tonnage simultaneously, it is often applied to the experiment of creeping under high stress level, but owing to have employed spring in device, due to the stress relaxation characteristics of spring, same needs often adjust instrument load, and voltage regulation result is undesirable.
Fluid pressure type Creep Apparatus utilizes servo hydraulic system to load, and has that heap(ed) capacity is large, floor area is little, precision advantages of higher.For the hydraulic pressure Creep Apparatus adding voltage-stabilizing system, its voltage regulation result is also fine, but due to its complex structure, cost is higher, cannot extensively promote the use of.
In Practical Project, when carrying out creep test to concrete, generally to carry out tensile creep and the test compressing two types of creeping, existing device can only provide the experiential function of creeping of a type mostly, if in order to two kinds of test types respectively prepare test battery device, not only cost is higher, and two covering devices need to take larger space.
Utility model content
For the content in background technology, the utility model proposes a kind of concrete lever tension and compression creep equipment with quiet pulley, its innovation is: described concrete tension and compression creep equipment is made up of bracing or strutting arrangement, charger and test specimen coupling arrangement;
Described bracing or strutting arrangement comprises base plate, the first bracing frame, the second bracing frame and the 3rd bracing frame, described base plate is fixedly connected with ground, first bracing frame, the second bracing frame and the 3rd bracing frame are all arranged on base plate, the axis of three is parallel to each other, and the second bracing frame is between the first bracing frame and the 3rd bracing frame;
Described charger comprises big lever, small lever, transmission rod, pulley and drag-line; Described pulley and the 3rd bracing frame are rotationally connected, be overlapped in the middle part of drag-line on the wheel rim of pulley, drag-line one end is connected with big lever right-hand member upper side, and the end of the drag-line other end is provided with hook I, and on big lever right-hand member downside, the position corresponding with drag-line is provided with hook II; Described big lever is positioned at below pulley, is rotationally connected in the middle part of big lever with the first bracing frame, and the junction of big lever and the first bracing frame forms fulcrum one, and fulcrum one is positioned at the left side of big lever axial midpoint; Big lever left end and transmission rod upper end are rotationally connected; Described small lever is positioned at below big lever, and transmission rod lower end and small lever left end are rotationally connected; Be rotationally connected with the second bracing frame in the middle part of small lever, the junction of small lever and the second bracing frame forms fulcrum two, and fulcrum two is positioned at the right side of small lever axial midpoint; First bracing frame is provided with the through hole passed for small lever; The right-hand member of small lever is connected with test specimen coupling arrangement;
Described test specimen coupling arrangement comprises supporting station, screw mandrel, operation board, terminal pad and fixture; Small lever right-hand member is provided with the threaded hole mated with screw mandrel, is threaded in the middle part of screw mandrel with threaded hole, and screw mandrel upper end is connected with operation board, and screw mandrel lower end is connected with terminal pad; Supporting station is arranged on base plate, and supporting station is positioned at below screw mandrel; Fixture is arranged between terminal pad and supporting station.
Principle of the present utility model is: form two leverages by big lever and small lever, wherein, in the leverage formed by big lever, the right-hand member of big lever is laborsaving end, left end is effort end, in the leverage formed by small lever, the left end of small lever is laborsaving end, right-hand member is effort end, by hook mass on hook I and hook II (on hook I during hook mass, for tension test, on hook II during hook mass, for compression test) come to apply acting force to big lever right-hand member, the left end of big lever passes through the left end of transmission rod transmission small lever, finally make force transmission to terminal pad place and be applied on fixture, screw mandrel is for regulating the spacing between supporting station and terminal pad (being regulated by rotating operation dish) to adapt to different sample dimensions, the utility model structure is simple, it is ingenious to design, two cover leverages are stacked together compactly, effectively reduce test unit size in the horizontal direction, elastomeric element is there is not in device, added load continues, stablizes, and set of device just can provide tension test and compression test two kinds of test functions.
Preferably, described fixture has two kinds, and wherein one is stretching clamp, and another kind is compression clamp;
Described compression clamp comprises load transducer, two pressure steel balls, top board and lower platens; The upper end of described load transducer is sphere, and load transducer lower end is plane, and the center position of load transducer lower surface is provided with the stopper slot mated with pressure steel ball; The center position of terminal pad lower surface is provided with the locating slot mated with load transducer upper end sphere; The center position of top board upper surface is provided with the groove mated with pressure steel ball; The center position of lower platen lower surface is provided with the guiding groove mated with pressure steel ball, and the center position of supporting station upper surface is provided with the draw-in groove mated with pressure steel ball; Terminal pad lower surface is by stopper slot and load transducer upper-end contact, load transducer lower end is by stopper slot and the first pressure steel ball upper contact, first pressure steel ball bottom contacts with the groove on top board upper surface, test specimen is arranged between top board and lower platen, lower platen is by the upper contact of guiding groove and the second pressure steel ball, and the bottom of the second pressure steel ball contacts with the draw-in groove on supporting station;
Described stretching clamp comprises two clamps and is connected pawl with two; The outer end of described clamp and the inner being connected pawl are tied by spherical universal and are connected; The inner of clamp is provided with T-slot, and the outer end connecting pawl is provided with the hook that can rotate; The circumferential side wall of supporting station is provided with the annular groove mated with hook, the upper surface of terminal pad is provided with the ring-shaped groove mated with hook; Test specimen two ends are connected in the T-slot of two clamps respectively, and the connection pawl of top is hooked in the ring-shaped groove on terminal pad by hook, the connection pawl of below is hooked on the annular groove on supporting station by hook.
Preferably, described spherical universal knot is made up of ball head and ball groove portion, and described ball head is connected with clamp outer end by linkage section, and described ball groove portion is arranged on the inner face of connection pawl, and the sidewall of described linkage section is provided with foil gauge.
Preferably, described surface of test piece is provided with displacement transducer.
Advantageous Effects of the present utility model is: structure is simple, reliable, and can apply lasting, constant load to test specimen, floor area is little, and set of device just can provide tension test and compression test two kinds of test functions.
Accompanying drawing explanation
Fig. 1, structural representation of the present utility model;
Fig. 2, compression clamp structural representation;
Fig. 3, stretching clamp structural representation;
Fig. 4, principle schematic when adopting the utility model to do tension test;
Fig. 5, principle schematic when adopting the utility model to make compression test;
In figure, each title corresponding to mark is respectively: base plate 1, first bracing frame 1-1, the second bracing frame 1-2, the 3rd bracing frame 1-3, big lever 2, small lever 3, transmission rod 4, pulley 5, drag-line 6, supporting station 7, screw mandrel 8, operation board 9, terminal pad 10, load transducer 11, two pressure steel balls 12, top board 13, lower platen 14, clamp 15, connect pawl 16, test specimen A, the directed force F that applied by mass.
Embodiment
With a concrete lever tension and compression creep equipment for quiet pulley, its innovation is: described concrete tension and compression creep equipment is made up of bracing or strutting arrangement, charger and test specimen coupling arrangement;
Described bracing or strutting arrangement comprises base plate 1, first bracing frame 1-1, the second bracing frame 1-2 and the 3rd bracing frame 1-3, described base plate 1 is fixedly connected with ground, first bracing frame 1-1, the second bracing frame 1-2 and the 3rd bracing frame 1-3 are all arranged on base plate 1, the axis of three is parallel to each other, and the second bracing frame 1-2 is between the first bracing frame 1-1 and the 3rd bracing frame 1-3;
Described charger comprises big lever 2, small lever 3, transmission rod 4, pulley 5 and drag-line 6; Described pulley 5 and the 3rd bracing frame 1-3 are rotationally connected, be overlapped on the wheel rim of pulley 5 in the middle part of drag-line 6, drag-line 6 one end is connected with big lever 2 right-hand member upper side, and the end of drag-line 6 other end is provided with hook I, and on big lever 2 right-hand member downside, the position corresponding with drag-line 6 is provided with hook II; Described big lever 2 is positioned at below pulley 5, is rotationally connected in the middle part of big lever 2 with the first bracing frame 1-1, and the junction of big lever 2 and the first bracing frame 1-1 forms fulcrum one, and fulcrum one is positioned at the left side of big lever 2 axial midpoint; Big lever 2 left end and transmission rod 4 upper end are rotationally connected; Described small lever 3 is positioned at below big lever 2, and transmission rod 4 lower end and small lever 3 left end are rotationally connected; Be rotationally connected with the second bracing frame 1-2 in the middle part of small lever 3, the junction of small lever 3 and the second bracing frame 1-2 forms fulcrum two, and fulcrum two is positioned at the right side of small lever 3 axial midpoint; First bracing frame 1-1 is provided with the through hole passed for small lever 3; The right-hand member of small lever 3 is connected with test specimen coupling arrangement;
Described test specimen coupling arrangement comprises supporting station 7, screw mandrel 8, operation board 9, terminal pad 10 and fixture; Small lever 3 right-hand member is provided with the threaded hole mated with screw mandrel 8, is threaded in the middle part of screw mandrel 8 with threaded hole, and screw mandrel 8 upper end is connected with operation board 9, and screw mandrel 8 lower end is connected with terminal pad 10; Supporting station 7 is arranged on base plate 1, and supporting station 7 is positioned at below screw mandrel 8; Fixture is arranged between terminal pad 10 and supporting station 7.
Further, described fixture has two kinds, and wherein one is stretching clamp, and another kind is compression clamp;
Described compression clamp comprises load transducer 11, two pressure steel balls 12, top board 13 and lower platens 14; The upper end of described load transducer 11 is sphere, and load transducer 11 lower end is plane, and the center position of load transducer 11 lower surface is provided with the stopper slot mated with pressure steel ball 12; The center position of terminal pad 10 lower surface is provided with the locating slot mated with load transducer 11 upper end sphere; The center position of top board 13 upper surface is provided with the groove mated with pressure steel ball 12; The center position of lower platen 14 lower surface is provided with the guiding groove mated with pressure steel ball 12, and the center position of supporting station 7 upper surface is provided with the draw-in groove mated with pressure steel ball 12; Terminal pad 10 lower surface is by stopper slot and load transducer 11 upper-end contact, load transducer 11 lower end is by stopper slot and the first pressure steel ball 12 upper contact, first pressure steel ball 12 bottom contacts with the groove on top board 13 upper surface, test specimen is arranged between top board 13 and lower platen 14, lower platen 14 is by the upper contact of guiding groove and the second pressure steel ball 12, and the bottom of the second pressure steel ball 12 contacts with the draw-in groove on supporting station 7;
Described stretching clamp comprises two clamps 15 and is connected pawl 16 with two; The outer end of described clamp 15 and the inner being connected pawl 16 are tied by spherical universal and are connected; The inner of clamp 15 is provided with T-slot, and the outer end connecting pawl 16 is provided with the hook that can rotate; The circumferential side wall of supporting station 7 is provided with the annular groove mated with hook, the upper surface of terminal pad 10 is provided with the ring-shaped groove mated with hook; Test specimen two ends are connected in the T-slot of two clamps 15 respectively, and the connection pawl 16 of top is hooked in the ring-shaped groove on terminal pad 10 by hook, and the connection pawl 16 of below is hooked on the annular groove on supporting station 7 by hook.
Further, described spherical universal knot is made up of ball head and ball groove portion, and described ball head is connected with clamp 15 outer end by linkage section, and described ball groove portion is arranged on the inner face of connection pawl 16, and the sidewall of described linkage section is provided with foil gauge.
Further, described surface of test piece is provided with displacement transducer.
During embody rule, the position of fulcrum one and fulcrum two, those skilled in the art can specifically select as required.
Claims (4)
1. be with a concrete lever tension and compression creep equipment for quiet pulley, it is characterized in that: described concrete tension and compression creep equipment is made up of bracing or strutting arrangement, charger and test specimen coupling arrangement;
Described bracing or strutting arrangement comprises base plate (1), the first bracing frame (1-1), the second bracing frame (1-2) and the 3rd bracing frame (1-3), described base plate (1) is fixedly connected with ground, first bracing frame (1-1), the second bracing frame (1-2) and the 3rd bracing frame (1-3) are all arranged on base plate (1), the axis of three is parallel to each other, and the second bracing frame (1-2) is positioned between the first bracing frame (1-1) and the 3rd bracing frame (1-3);
Described charger comprises big lever (2), small lever (3), transmission rod (4), pulley (5) and drag-line (6); Described pulley (5) and the 3rd bracing frame (1-3) are rotationally connected, drag-line (6) middle part is overlapped on the wheel rim of pulley (5), drag-line (6) one end is connected with big lever (2) right-hand member upper side, the end of drag-line (6) other end is provided with hook I, and position corresponding with drag-line (6) on big lever (2) right-hand member downside is provided with hook II; Described big lever (2) is positioned at pulley (5) below, big lever (2) middle part is rotationally connected with the first bracing frame (1-1), the junction of big lever (2) and the first bracing frame (1-1) forms fulcrum one, and fulcrum one is positioned at the left side of big lever (2) axial midpoint; Big lever (2) left end and transmission rod (4) upper end are rotationally connected; Described small lever (3) is positioned at big lever (2) below, and transmission rod (4) lower end and small lever (3) left end are rotationally connected; Small lever (3) middle part is rotationally connected with the second bracing frame (1-2), and small lever (3) forms fulcrum two with the junction of the second bracing frame (1-2), and fulcrum two is positioned at the right side of small lever (3) axial midpoint; First bracing frame (1-1) is provided with the through hole passed for small lever (3); The right-hand member of small lever (3) is connected with test specimen coupling arrangement;
Described test specimen coupling arrangement comprises supporting station (7), screw mandrel (8), operation board (9), terminal pad (10) and fixture; Small lever (3) right-hand member is provided with the threaded hole mated with screw mandrel (8), and screw mandrel (8) middle part is threaded with threaded hole, and screw mandrel (8) upper end is connected with operation board (9), and screw mandrel (8) lower end is connected with terminal pad (10); Supporting station (7) is arranged on base plate (1), and supporting station (7) is positioned at screw mandrel (8) below; Fixture is arranged between terminal pad (10) and supporting station (7).
2. a kind of concrete lever tension and compression creep equipment with quiet pulley according to claim 1, it is characterized in that: described fixture has two kinds, wherein one is stretching clamp, and another kind is compression clamp;
Described compression clamp comprises load transducer (11), two pressure steel balls (12), top board (13) and lower platens (14); The upper end of described load transducer (11) is sphere, and load transducer (11) lower end is plane, and the center position of load transducer (11) lower surface is provided with the stopper slot mated with pressure steel ball (12); The center position of terminal pad (10) lower surface is provided with the locating slot mated with load transducer (11) upper end sphere; The center position of top board (13) upper surface is provided with the groove mated with pressure steel ball (12); The center position of lower platen (14) lower surface is provided with the guiding groove mated with pressure steel ball (12), and the center position of supporting station (7) upper surface is provided with the draw-in groove mated with pressure steel ball (12); Terminal pad (10) lower surface is by stopper slot and load transducer (11) upper-end contact, load transducer (11) lower end is by stopper slot and the first pressure steel ball (12) upper contact, first pressure steel ball (12) bottom contacts with the groove on top board (13) upper surface, test specimen is arranged between top board (13) and lower platen (14), lower platen (14) is by the upper contact of guiding groove and the second pressure steel ball (12), and the bottom of the second pressure steel ball (12) contacts with the draw-in groove on supporting station (7);
Described stretching clamp comprises two clamps (15) and is connected pawl (16) with two; The outer end of described clamp (15) and the inner being connected pawl (16) are tied by spherical universal and are connected; The inner of clamp (15) is provided with T-slot, and the outer end connecting pawl (16) is provided with the hook that can rotate; The circumferential side wall of supporting station (7) is provided with the annular groove mated with hook, and the upper surface of terminal pad (10) is provided with the ring-shaped groove mated with hook; Test specimen two ends are connected in the T-slot of two clamps (15) respectively, and the connection pawl (16) of top is hooked in the ring-shaped groove on terminal pad (10) by hook, and the connection pawl (16) of below is hooked on the annular groove on supporting station (7) by hook.
3. a kind of concrete lever tension and compression creep equipment with quiet pulley according to claim 2, it is characterized in that: described spherical universal knot is made up of ball head and ball groove portion, described ball head is connected with clamp (15) outer end by linkage section, described ball groove portion is arranged on the inner face of connection pawl (16), and the sidewall of described linkage section is provided with foil gauge.
4. a kind of concrete lever tension and compression creep equipment with quiet pulley according to Claims 2 or 3, is characterized in that: described surface of test piece is provided with displacement transducer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520178038.8U CN204495660U (en) | 2015-03-27 | 2015-03-27 | A kind of concrete lever tension and compression creep equipment with quiet pulley |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520178038.8U CN204495660U (en) | 2015-03-27 | 2015-03-27 | A kind of concrete lever tension and compression creep equipment with quiet pulley |
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| CN204495660U true CN204495660U (en) | 2015-07-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520178038.8U Withdrawn - After Issue CN204495660U (en) | 2015-03-27 | 2015-03-27 | A kind of concrete lever tension and compression creep equipment with quiet pulley |
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| CN (1) | CN204495660U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104677745A (en) * | 2015-03-27 | 2015-06-03 | 重庆交通大学 | Concrete lever type tension-compression creep device provided with static pulley |
-
2015
- 2015-03-27 CN CN201520178038.8U patent/CN204495660U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104677745A (en) * | 2015-03-27 | 2015-06-03 | 重庆交通大学 | Concrete lever type tension-compression creep device provided with static pulley |
| CN104677745B (en) * | 2015-03-27 | 2017-03-01 | 重庆交通大学 | A kind of concrete lever tension and compression creep equipment with quiet pulley |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150722 Effective date of abandoning: 20171114 |
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| AV01 | Patent right actively abandoned |