CN101865801B - Strain fully-automatic twin unconfined compressor - Google Patents
Strain fully-automatic twin unconfined compressor Download PDFInfo
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- CN101865801B CN101865801B CN2010101944197A CN201010194419A CN101865801B CN 101865801 B CN101865801 B CN 101865801B CN 2010101944197 A CN2010101944197 A CN 2010101944197A CN 201010194419 A CN201010194419 A CN 201010194419A CN 101865801 B CN101865801 B CN 101865801B
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Abstract
The invention relates to a strain fully-automatic twin unconfined compressor. The compressor consists of a reaction and detection device, a loading and driving device and a data acquisition processing device, wherein a gantry frame of the reaction and detection device is a dual gantry frame comprising two parallel reverse U-shaped frames; the lower ends of fixed rods in the middle of an upper cross beam on the reverse U-shaped frames are provided with force transducers; vertical upright posts of the gantry frame are provided with displacement transducers; the loading and driving device comprises two lifting devices which are correspondingly arranged on the lower parts of the force transducers in the reverse U-shaped frames; the two lifting devices are driven by a driving motor through a reducing gear, so lifting main shafts of the lifting devices are driven to lift vertically to pressurize two groups of samples between a reaction force pressurizing cap and a lower pressurizing cap; the data display of an axial force signal and an axial displacement signal detected by the force transducer and the displacement transducer is implemented by an LED digital display in real time; and meanwhile, the signals are also transmitted to a universal microcomputer to be processed through an A/D converter, so that the unconfined compressive ultimate strength and the stress strain curve of the two groups of samples are obtained.
Description
Technical field
The present invention relates to the geotechnical mechanics test apparatus, particularly relate to the geotechnical mechanics test apparatus that detects sample axial limit compressive strength under the no lateral pressure condition.
Background technology:
Unconfined compressive strength is to differentiate the important technology parameter of foundation soil mechanical property, and in Geotechnical Engineering, unconfined compression strength test is the conventional project in the geotechnical mechanics test.The unconfined compressive strength of sample is measured through the strain-type unconfined compression apparatus; Utilize mechanical loading system to apply axial force to sample; Detect the axial force and the axial displacement of process of the test respectively by force cell and displacement transducer, thereby draw the no lateral confinement ultimate compression strength and the stress-strain diagram of sample.
Fig. 1 shows the basic structure of the simply connected unconfined compression apparatus of prior art, is made up of counter-force and pick-up unit, loading and drive unit, data acquisition processing device three parts.
Counter-force and pick-up unit comprise that portal frame, counter-force add pressure cap and detecting sensor.
Portal frame is used to be provided with counter-force and adds pressure cap and detecting sensor, and detecting sensor comprises force cell and displacement transducer.Loading and drive unit comprise drive motor, reduction gearing and jacking gear.Data acquisition processing device comprises A/D converter and microcomputer, the passage joint detection sensor of A/D converter.
The entablature 1 of portal frame is supported by two vertical pillars on the base plate that is fixed on cabinet 12 17 3,4.The centre of entablature 1 is provided with fixed bar 2, and the lower end of fixed bar 2 is provided with force cell 5, and the lower end of force cell 5 is provided with counter-force and adds pressure cap 6.Detecting sensor comprises force cell 5 and displacement transducer 7, and displacement transducer 7 is arranged on the portal frame vertical pillars 4, and the gauge head of displacement transducer 7 contacts with the dial plate 11 of up-down main shaft 13 upper ends, and changes with the up-down of dial plate 11.
Loading and drive unit comprise drive motor 14, reduction gearing and jacking gear, and drive motor 14 is made vertical displacement movement through the up-down main shaft 13 that reduction gearing and worm gear drive jacking gear.
Jacking gear is arranged in the cabinet 12, comprises up-down main shaft 13, horizontal worm gear 16 and horizontal worm screw 15.Up-down main shaft 13 is screw rods that the lower end has square thread, inserts in the screw at horizontal worm gear 16 centers.The square external thread of up-down main shaft 13 lower end screw rods and the interior ring screw-threaded engagement of horizontal worm gear 16, the flank engagement of the outer shroud flank of tooth of horizontal worm gear 16 and horizontal worm screw 15 front portions, the up-down main shaft can be made vertical displacement movement under the effect of loading and drive unit.
Up-down main shaft 13 upwards passes from cabinet 12, and the axis of the fixed bar 2 that is provided with portal frame entablature 1 is on same pedal line.Up-down main shaft 13 upper ends are provided with dial plate 11, and the upside of dial plate 11 is provided with down and adds pressure cap 10.Add pressure cap 10 down and add the crown shape member that pressure cap 6 is two symmetries, be used to place and clamp sample to be detected 8 with counter-force.
Data acquisition processing device comprises double channel A/D converter and microcomputer, and the passage input end of A/D converter connects force cell 5 and displacement transducer 7.
When the simply connected unconfined compression apparatus that Fig. 1 shows carries out soil property sample compressed detected; Sample put into down add pressure cap 10 and counter-force adds between the pressure cap 6; Drive motor 14 drives horizontal worm screw 15 through reduction gearing and rotates; Horizontal worm screw 15 is rotated and drives horizontal worm gear 16 rotations, and the rotation of horizontal worm gear 16 drives up-down main shaft 13 vertical uplift of inserting in horizontal worm gear 16 center screws.Through up-down main shaft 13, dial plate 11 and the following rising that adds pressure cap 10, make sample produce axial deformation and stressed, force cell 5 detects the variation of axial forces, and displacement transducer 7 is measured the axial deformation that moves the sample 8 that is reflected on the dial plate 11.The measuring-signal of force cell 5 and displacement transducer 7 carries out data processing by microcomputer and shows the no lateral confinement ultimate compression strength and the stress-strain diagram of sample.
But the simply connected unconfined compression apparatus of above-mentioned prior art can only be accomplished the compression test of a sample at every turn, and control function is simple, and speed adjustable range is narrow, need manually return, and inefficiency can not adapt to the detection test of a large amount of samples.
Summary of the invention:
The inefficiency that exists to the simply connected unconfined compression apparatus of above-mentioned prior art, can not adapt to the problem that current experiment work amount provides the test result demand greatly and rapidly and efficiently; The present invention has released a kind of strain fully-automatic twin unconfined compressor of new structure; Utilize two groups of tests of motor-driven loading system; Make it do synchronously motion in the same way, and accomplish two groups of displacement measurements of testing, on an instrument, can accomplish the unconfined compression test of two groups of samples simultaneously with a displacement transducer; Simplify apparatus structure greatly, improved work efficiency.
Strain fully-automatic twin unconfined compressor involved in the present invention is made up of counter-force and pick-up unit, loading and drive unit, data acquisition processing device.Counter-force and pick-up unit comprise that portal frame, counter-force add pressure cap and detecting sensor, and detecting sensor comprises force cell and displacement transducer.Loading and drive unit comprise drive motor, reduction gearing and jacking gear.Data acquisition processing device comprises A/D converter and microcomputer, the passage input end joint detection sensor of A/D converter.
The portal frame of counter-force and pick-up unit is a portal frame entablature and three two portal frames of in-line that the portal frame vertical pillars forms, and contains two ∏ shape frameworks arranged side by side.In the middle of each ∏ shape framework entablature, be provided with fixed bar, the lower end of fixed bar is provided with force cell, and the lower end of force cell is provided with counter-force and adds pressure cap.On the middle portal frame vertical pillars displacement transducer is set.Detecting sensor is two force cells and a displacement transducer.
Loading and drive unit have two jacking gears, are arranged on the bottom of two portal frames, and a jacking gear correspondence is arranged on the bottom in the middle of the ∏ shape framework.Two jacking gears are driven through reduction gearing by a drive motor, and each jacking gear comprises up-down main shaft, horizontal worm gear and horizontal worm screw.Under drive motor drove, the up-down main shaft of jacking gear was done vertical displacement movement.The axis of up-down main shaft and portal frame entablature fixed bar is on same pedal line.
Up-down main shaft upper end is provided with down and adds pressure cap, and the top is directly fixing on the up-down main shaft adds pressure cap down, and the fixing dial plate in top adds pressure cap under fixing on the dial plate again on another up-down main shaft, and the upper end surface that adds pressure cap under two is on same surface level.The gauge head of the displacement transducer that is provided with on the last plane of dial plate and the portal frame intermediate vertical column contacts.
Up-down main shaft bottom is to have square externally threaded screw rod, vertically inserts in the external thread internal thread hole at horizontal worm gear center the external thread of up-down main shaft bottom screw rod and the engagement of the internal thread at horizontal worm gear center.
Horizontal worm gear is the ring-type worm gear, the flank engagement that the outer shroud flank of tooth of horizontal worm gear and horizontal worm screw are anterior.The horizontal worm screw of two jacking gears is linked by shaft coupling.
Two horizontal worm screws by shaft coupling be linked together.
The control device of drive motor is installed in the control box of wheel box and drive motor top, the electric motor starting that comprises rate of loading selecting arrangement that speed is provided with circuit and five interlocking buttons and forms, is made up of logical circuit and six six cutter interlocking key switchs, stops, automatic/hand, going up soon, soon down and automatically reset etc. and manually to control and the microcomputer automatic control operating key.
Be provided with in the back upper place of jacking gear that the spacing safety apparatus of up-down main shaft comprise the upper and lower limit bit switch, fastening switch and spacing release button and sequential circuit reset.When limit switch contact contacted, driving power was opened a way to corresponding with it go up (or down) when up-down main spindle's dial plate rising (or decline), and motor quits work.Pin the spacing locking key of separating when removing spacing state, again by recovering operate as normal with spacing fast going up (or down fast) key in the opposite direction like desire.But it is gone up soon, adds the pressure cap initial position down and under the automatic reset switch rapid adjustment soon, and motor action will be by system controlled by computer when automatic key is pressed.
Data acquisition processing device comprises the LED nixie display and has the A/D converter of passage control function and external universal microcomputer.
When strain fully-automatic twin unconfined compressor involved in the present invention carries out soil property sample compressed detected; Two samples are put into respectively add pressure cap under two pairs and counter-force adds between the pressure cap; Drive motor drives the horizontal worm screw of two jacking gears that joined by shaft coupling through reduction gearing, makes the VTOL (vertical take off and landing) main shaft of two jacking gears do synchronously motion in the same way.The rising of up-down main shaft is risen the following pressure cap that adds of its upper end, and the rising that adds pressure cap down makes the stressed and generation distortion of sample that adds between the pressure cap upper and lower, by force cell test samples stress.Simultaneously, the rising of up-down main shaft makes on the dial plate and moves, and the axial displacement after the displacement transducer gauge head measurement sample that contacts with dial plate is stressed changes.
Two force cells and detected axial force of displacement transducer and axial displacement variable signal are passed to the LED nixie display through amplifier carries out real time data and shows, delivers to universal microcomputer through A/D converter again simultaneously and handles to obtain the no lateral confinement ultimate compression strength and the stress-strain diagram of two groups of samples.
Strain fully-automatic twin unconfined compressor involved in the present invention has realized on an instrument, accomplishing simultaneously the unconfined compression test of two samples, has improved the work efficiency of unconfined compression test, has enlarged the functions of use and the automaticity of instrument.
Description of drawings:
The existing simply connected unconfined compression apparatus of Fig. 1 structural representation.
Fig. 2 strain fully-automatic twin unconfined compressor structural representation of the present invention.
Description of symbols among the figure:
1, entablature 2, fixed bar
3, vertical pillars 4, vertical pillars
5, force cell 6, counter-force add pressure cap
7, displacement transducer 8, sample
9, displacement sensor bracket 10, add pressure cap down
11, dial plate 12, cabinet
13, up-down main shaft 14, drive motor
15, horizontal worm screw 16, horizontal worm gear
17, base plate 18, portal frame entablature
19,20,21, portal frame vertical pillars
22, fixed bar 23, force cell
24, counter-force adds pressure cap 25, displacement transducer
26, sample 27, add pressure cap down
28, dial plate 29, up-down main shaft
30, shaft coupling 31, horizontal worm gear
32, horizontal worm screw 33, control device
34, LED nixie display 35, drive motor
36, reduction gearing
Embodiment
Below in conjunction with accompanying drawing concrete technical scheme of the present invention is further specified.
Fig. 2 shows the basic structure of the strain fully-automatic twin unconfined compressor that the present invention relates to.As shown in Figure 2, strain fully-automatic twin unconfined compressor involved in the present invention is made up of counter-force and pick-up unit, loading and drive unit, data acquisition processing device.
Counter-force and pick-up unit comprise that portal frame, counter-force add pressure cap, two force cells and a displacement transducer.Loading and drive unit comprise drive motor 35, reduction gearing 36 and jacking gear.Data acquisition processing device comprises LED real time data display device, A/D converter and microcomputer, the passage input end joint detection sensor of A/D converter.
The portal frame of counter-force and pick-up unit forms the two portal frames of an in-line arranged side by side by a portal frame entablature 18 and three portal frame vertical pillars 19,20,21; Contain two ∏ shape frameworks arranged side by side; In the middle of each ∏ shape framework entablature, be provided with fixed bar 22; The lower end of fixed bar 22 is provided with force cell 23, and the lower end of force cell 23 is provided with counter-force and adds pressure cap 24, on the middle portal frame vertical pillars 20 displacement transducer 25 is set; Loading and drive unit have two jacking gears; A jacking gear correspondence is arranged on the bottom of force cell in the ∏ shape framework; Two jacking gears are driven through reduction gearing 36 by a drive motor 35; Each jacking gear comprises up-down main shaft 29, horizontal worm gear 31 and horizontal worm screw 32, and under drive motor 35 drove, the up-down main shaft 29 of jacking gear was done vertical displacement movement; Up-down main shaft upper end is provided with down and adds on 27, one up-down main shafts of pressure cap the top and add pressure cap under directly fixing, the fixing dial plate 28 in top on another up-down main shaft 29, and dial plate 28 upsides add pressure cap 27 under fixing again.The gauge head of the displacement transducer 25 that is provided with on the last plane of dial plate 27 and the portal frame intermediate vertical column 20 contacts.
Up-down main shaft 29 bottoms are to have square externally threaded screw rod, vertically insert in the internal thread hole at horizontal worm gear 31 centers the internal thread engagement at the external thread of up-down main shaft 29 bottom screw rods and horizontal worm gear 31 centers.Horizontal worm gear 31 is the ring-type worm gear, the flank engagement of the outer shroud flank of tooth of horizontal worm gear 31 and horizontal worm screw 32 front portions.
The horizontal worm screw 32 of two jacking gears is linked by shaft coupling 30.
It is two groups of totally four stainless steel convex cap shape members that physical dimension is identical with adding pressure cap 27 down that counter-force adds pressure cap 24; There is the installation screw at the end end face center that convex cap shape member diameter is little; The end end face that diameter is big is the plane; This plane is vertical with the center line that screw is installed, and has on the big end outer circumference face of diameter and is convenient to the embossing that hand is twisted.
Two counter-forces add pressure cap 24 has the end face of screw to make progress, and is individually fixed in the lower end of two force cells 23 with the light head screw.Adding pressure cap 27 under two has the end face of screw downward, and one is fixed on the up-down main shaft 29 upper end double-screw bolts, and another is fixed in the top that is through the location mark plate 28 on the double-screw bolt of up-down main shaft upper end.27 upper end surfaces that add pressure cap under two are on same surface level.
The control device 33 of drive motor 35 is installed in the control box 33 of reduction gearing 36 and drive motor 35 tops.
The LED nixie display 34 of data acquisition processing device is arranged on the panel of control device 33.
Claims (8)
1. strain fully-automatic twin unconfined compressor; Constitute by counter-force and pick-up unit, loading and drive unit, data acquisition processing device; Counter-force and pick-up unit comprise that portal frame, counter-force add pressure cap and detecting sensor; Detecting sensor comprises force cell and displacement transducer, and loading and drive unit comprise drive motor, reduction gearing and jacking gear, and data acquisition processing device comprises A/D converter and microcomputer; It is characterized in that: the portal frame of counter-force and pick-up unit forms the two portal frames of an in-line arranged side by side by a portal frame entablature (18) and three portal frame vertical pillars (19,20,21); Contain two ∏ shape frameworks arranged side by side, in the middle of each ∏ shape framework entablature, be provided with fixed bar (22), the lower end of fixed bar (22) is provided with force cell (23); The lower end of force cell (23) is provided with counter-force and adds pressure cap (24), on the middle portal frame vertical pillars (20) displacement transducer (25) is set; Loading and drive unit have two jacking gears; A jacking gear correspondence is arranged on the bottom of force cell in the ∏ shape framework; Two jacking gears are driven through reduction gearing (36) by a drive motor (35); Each jacking gear comprises up-down main shaft (29), horizontal worm gear (31) and horizontal worm screw (32), and under drive motor (35) drove, the up-down main shaft (29) of jacking gear was done vertical displacement movement; Up-down main shaft upper end is provided with down and adds pressure cap (27), and the top adds pressure cap under directly fixing on the up-down main shaft, and another up-down main shaft (29) is gone up fixedly dial plate (28) of top, adds pressure cap (27) under dial plate (28) upside is fixing again.
2. according to the said strain fully-automatic twin unconfined compressor of claim 1, it is characterized in that: the axis of the fixed bar (22) that up-down main shaft (29) and portal frame entablature (18) are provided with is on same pedal line.
3. according to the said strain fully-automatic twin unconfined compressor of claim 2; It is characterized in that: up-down main shaft (29) bottom is to have square externally threaded screw rod; In the internal thread hole at vertical insertion horizontal worm gear (31) center, the external thread of up-down main shaft (29) bottom screw rod and the engagement of the internal thread at horizontal worm gear (31) center.
4. according to the said strain fully-automatic twin unconfined compressor of claim 3, it is characterized in that: horizontal worm gear (31) is the ring-type worm gear, the flank engagement that the outer shroud flank of tooth of horizontal worm gear (31) and horizontal worm screw (32) are anterior.
5. according to the said strain fully-automatic twin unconfined compressor of claim 4, it is characterized in that: two horizontal worm screws (32) are linked by shaft coupling (30).
6. strain fully-automatic twin unconfined compressor according to claim 1; It is characterized in that: it is two groups of totally four stainless steel convex cap shape members that physical dimension is identical with adding pressure cap (27) down that counter-force adds pressure cap (24); There is the installation screw at the end end face center that convex cap shape member diameter is little; The end that diameter is big has horizontal end face; Horizontal end face is with that center line of bolt hole is installed is vertical, and horizontal end face is the stress surface that acts on sample, has on the big end outer circumference face of diameter and is convenient to the embossing that hand is twisted.
7. strain fully-automatic twin unconfined compressor according to claim 6 is characterized in that: two counter-forces add pressure cap (24) has the end face of screw to make progress, and is individually fixed in the lower end of two force cells (23) with the light head screw; Adding pressure cap (27) under two has the end face of screw downward, and one is fixed on the double-screw bolt of up-down main shaft (29) upper end, and another is fixed in the top that is through the location mark plate (28) on the bolt of up-down main shaft upper end.
8. strain fully-automatic twin unconfined compressor according to claim 7 is characterized in that: (27) upper end surface that adds pressure cap under two is on same surface level.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010101944197A CN101865801B (en) | 2010-06-08 | 2010-06-08 | Strain fully-automatic twin unconfined compressor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010101944197A CN101865801B (en) | 2010-06-08 | 2010-06-08 | Strain fully-automatic twin unconfined compressor |
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| CN101865801A CN101865801A (en) | 2010-10-20 |
| CN101865801B true CN101865801B (en) | 2012-06-06 |
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| CN108489823A (en) * | 2018-03-30 | 2018-09-04 | 青岛理工大学 | A kind of strain controlling formula low temperature unconfined compression apparatus |
| CN110595890B (en) * | 2019-10-09 | 2022-07-22 | 嘉兴市建超智能科技有限公司 | Intensity detection pressing device in manufacturing process of liquid crystal display screen support frame |
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2010
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US4523475A (en) * | 1983-09-19 | 1985-06-18 | The United States Of America As Represented By The Secretary Of The Air Force | Simultaneous incremental strain/incremental temperature analog device for, and method, of testing for stress response |
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Address after: 300142 Hebei District, Zhongshan Road, No. 10, Patentee after: China Railway Design Group Limited Address before: 300142 Hebei District, Zhongshan Road, No. 10, Patentee before: China Railway Third Survey and Design Institute Group Ltd. |
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