CN205593845U - Electronic loess tensilometer - Google Patents
Electronic loess tensilometer Download PDFInfo
- Publication number
- CN205593845U CN205593845U CN201620301918.4U CN201620301918U CN205593845U CN 205593845 U CN205593845 U CN 205593845U CN 201620301918 U CN201620301918 U CN 201620301918U CN 205593845 U CN205593845 U CN 205593845U
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- China
- Prior art keywords
- slide rail
- bearing
- loess
- collet
- tight loop
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Abstract
The utility model discloses an electronic loess tensilometer, the stiff end flange links firmly with the base through connecting bolt, the stiff end collet is bolted connection with the stiff end flange, the stiff end tight loop links firmly and installs on the slide rail with the tight loop support, and sample bearing installation is on the slide rail, and application of force end tight loop links firmly and installs on the slide rail with the tight loop support, can follow the slide rail and slide, application of force end collet has double -lug, is connected with joint bearing through the round pin axle, joint bearing with draw pressure sensor to connect respectively in ball pivot side about, draw pressure sensor and the electronic jar of straight line to be connected, electronic jar of straight line and the electronic jar support of straight line pass through connecting bolt and are connected with the slide rail support, slide rail bearing installation can follow the slide rail and carry out position control on the slide rail, the slide rail then links firmly with the base bolt, slide rail support fixed block is used for connecting slide rail support and base. The utility model is simple in operation it is effectual, maneuverability has, can realize stress control formula tensile test and compliance control formula tensile test.
Description
Technical field
This utility model belongs to Geotechnical Engineering field, is specifically related to a kind of earthwork test Instrument, a kind of electronic loess tensilometer.
Background technology
Loess is a kind of special continent rickle in the Quaternary Period, and the most distributed more widely, wherein Asia distribution is the widest.The distribution area of China's loess is about 640,000 km2, accounting for the 6.3% of area, be mainly distributed on northwest, North, Northeast China area, these areas are positioned at the peripheral eastern region of the desert area, northwest, inside of China mainland, have abundant oil, natural gas, coal and land resource.But, typical loess has macrovoid, weak cementing micro structure, having higher mechanical strength in the dry state, once soaked its mechanical strength and drastically reduce, therefore the research to Loess Mechanics becomes the problem that Canal in Loess Area engineering construction must take into.
Strength problem is one of important mechanical index of loess, is one of the important evidence of engineering investigation design and construction.Due to earth structure, to bear the ability of tension more weak, and the tensile strength values of loess is the least, and designer more studies the shearing resistance of the soil body, comprcssive strength in the ordinary course of things, does not considers the tensile strength of loess.But in many engineering problems, the cracking of the soil body is but owing to the tensile failure of the soil body causes, the crack produced such as the soil body or the ground bigger differential settlement of generation, the phenomenon that the soil body after retaining wall and slight slope slide mass ftracture due to tensile failure, the draw crack etc. caused due to the raising of pore water pressure in the soil body.Often being ignored by people due to tensile strength and even ignore, thereby resulted in serious geotechnical engineering problems, to such an extent as to brought huge economic loss, therefore the tensile strength to loess studies more realistic meaning.
In soil test, measuring the conventional test method of soil body tensile strength has uniaxial tensile test, triaxial extension test and soil beam deflection test.Uniaxial tensile test uses and is fixed soil body one end, carries out the other end by the way of counterweight applies pulling force, and the weight of counterweight is pulling force suffered by the soil body.The method is due to added counterweight number quantitative limitation, it is impossible to applying bigger pulling force to soil sample, its range is limited, and in process of the test, easily there is elastic deformation in the steel wire rope connecting soil sample and counterweight, causes and apply the loss that pulling force is bigger, have a strong impact on test data.Triaxial extension test is vertically to be stretched by sample, in process of the test, sample outer surface need to be coated with one layer of silicone grease, thereby increase sample at axial frictional force and restraining forces, gained soil body tensile strength values is bigger than normal, and need the vertical sample two ends placed being ensured, cementing status is also more difficult in process of the test, the rickle suitability this for loess is poor.Soil beam deflection test is the bending tensile test that will carry out after soil sample compaction in layers in a mold, it is impossible to tests intact loess, especially carries out compacting when the moisture content of loess sample is bigger and be easily formed " spongy soil ".Carry out the instrument of tension test owing to lacking of loess at present, therefore the research about loess tensile strength is the fewest.
Summary of the invention
The purpose of this utility model is to overcome above-mentioned prior art not enough, it is provided that a kind of electronic loess tensilometer, this instrumentation simple effects is good, has operability, it is possible to realize Stress Control formula tension test and strain controlling formula tension test.
The technical solution of the utility model is achieved in that
Fixing end flanges is fixedly connected with the base；Fixing end collet is that bolt is connected with fixing end flanges；Fixing end tight loop is connected with tight loop bearing and is installed on the first slide rail, can slide along the first slide rail；Sample bearing is installed on the first slide rail, can slide along the first slide rail；Force side tight loop and tight loop bearing are connected and are installed on the first slide rail, can slide along the first slide rail；Force side collet is connected with oscillating bearing；Oscillating bearing and pull pressure sensor are connected to left side and the right side of ball pivot；Pull pressure sensor is connected with Linear-electric-cylinder；Linear-electric-cylinder and Linear-electric-cylinder bearing thereof are connected with slide rail bearing；Slide rail bearing is installed on slide rail, can carry out position adjustments along slide rail；First slide rail and the second slide rail are connected with foundation bolt；Slide rail bearing fixed block (20) is used for connecting sliding rail bearing and pedestal.
Technique effect of the present utility model:
The cylinder sample of a diameter of 20cm can be tested by collet of the present utility model and tight loop, specimen length can be chosen flexibly according to Research Requirements, the diversity of soil mass property cut down as far as possible by large-sized sample, tests surveyed data and can reflect the mechanical property of soil sample more realistically.This utility model instrument uses collet and tight loop to be fixed sample, ensures being fixedly clamped of various sample by the compensating roller state of tight loop fastening bolt in the case of reducing sample disturbance as far as possible, simple to operate and effective.Sample is placed on shifting sledge bearing by this utility model instrument, eliminates sample gravity, and effectively reduces the impact of frictional force, improves bigger moisture content loess sample and the operability of disturbed loess sample tensile test.Sample erecting bed and horizontal pull loading system are placed on mobile support saddle by this utility model instrument, add the motility that instrument uses；The each parts of instrument all use mechanical connection, the particularly convenient maintenance carrying out parts and replacing, provide convenience for saving use cost, it is easy to promote.
Accompanying drawing explanation
Fig. 1 is this utility model electronic loess tensilometer structure chart；
Fig. 2 is this utility model fixing end collet structural representation；
Fig. 3 is this utility model tight loop structural representation；
Fig. 4 is this utility model force side collet structural representation.
1-pedestal 2-fixes end flanges 3,22-connecting bolt 4-fixing end collet 5,11-tight loop fastening bolt 6-fixing end tight loop 7, tight loop 12-force side, 9-tight loop bearing 8-sample bearing 10-force side collet 13-bearing pin 14-oscillating bearing 15-the first slide rail, 24-the second slide rail 16-ball pivot 17-pull pressure sensor 18-displacement transducer 19-Linear-electric-cylinder bearing 20-slide rail bearing fixed block 21-Linear-electric-cylinder 23-slide rail bearing 25-Control & data acquisition cabinet.
Detailed description of the invention
As it is shown in figure 1,1 is pedestal, it is used for supporting whole instrument platform；2 is fixing end flanges, for support fixed end collet and tight loop；3 and 22 is connecting bolt, is respectively used to adpting flange, slide rail bearing and pedestal and connects；4 is fixing end collet (structure is as shown in Figure 2), is mainly used in fixing end sample and places；5 and 11 is tight loop fastening bolt, and when being used for clamping tight loop and preventing stretching, sample comes off；6 is fixing end tight loop (structure is as shown in Figure 3), for imposing uniform clamping force to soil sample；7 and 9 is tight loop bearing, is connected with tight loop, is used for supporting tight loop；8 is sample bearing, is used for supporting tested sample；10 is force side tight loop (structure is as shown in Figure 3), clamps sample for force side；12 is force side collet (structure is as shown in Figure 4), except placing for force side sample, is additionally operable to be connected with force application apparatus；13 is bearing pin, connects for oscillating bearing and collet；14 is oscillating bearing；15 and 24 is the first and second slide rails；16 is ball pivot, is used for ensureing horizontal linear load and axis centering, prevents power bias from producing heeling moment；17 is pull pressure sensor, is used for measuring horizontal linear pulling force；18 is displacement transducer, is used for measuring horizontal direction displacement, calculates the stretcher strain amount of sample；19 is Linear-electric-cylinder bearing, is used for supporting electric cylinder；20 is slide rail bearing fixed block, makes and pedestal for connecting sliding rail；21 is Linear-electric-cylinder, is used for providing horizontal linear pressure；23 is slide rail bearing, is used for supporting Linear-electric-cylinder bearing and Linear-electric-cylinder；25 is Control & data acquisition cabinet, processes for instrument test Control & data acquisition.
With reference to shown in 2, fixing end collet 4 uses claw type flake structure, this structure has certain elasticity, cannot the circular problem of strict guarantee for cut soil sample, the elastic deformation of this structure is adaptable to the shape of soil sample, during tight loop fastening simultaneously, by the deformation of collet, soil sample can be clamped, it is to avoid during applying pulling force, soil sample gets loose.
With reference to shown in Fig. 3, tight loop is open circles annular, it is simple to be enclosed within collet；Being designed with oval bolt hole at opening two ends, it is simple to bolts and nuts alignment connects, it is ensured that fastening collet, clamping force can be by tighting a bolt guarantee.
With reference to shown in Fig. 4, force side collet 12 uses claw type flake structure equally, and its principle of work and power is identical with fixing end collet 4.The common ground of the two is that promptly flake structure has elasticity, and intermediate disc has stronger rigidity, and this is in order to avoid being deformed affecting results precision when sample stretches.The two difference is to connect interface, and fixing end collet 4 has 8 bolts hole, for being connected with fixing end flanges 2 at center；It is ears sheet that force side collet 12 connects interface, is connected with oscillating bearing 14 by bearing pin 13.
This instrument is mainly used in loess is carried out tensile strength test.
First by good for sample cut and carry out moisture content preparation by test demand before test, after will prepare the sample two ends epoxy resin cure of moisture content, the size of two ends solidification can determine according to sample situation, and preparation to be tested is placed centrally on sample bearing 8 after completing.The mobile tight loop bearing 7 being installed on the first slide rail 15 and fixing end tight loop 6 so that it is being placed on fixing end collet 4, now tight loop fastening bolt 5 is in releasing orientation.Mobile support saddle 8 makes sample one end horizontally enter into fixing end collet 4, then the tight loop bearing 9 and force side tight loop 10 being installed on the first slide rail 15 is moved, it is made to be placed on the sample other end, now tight loop fastening bolt 11 is in releasing orientation, adjust sample two ends riding position by the first slide rail 15, make fixing end and the collet of force side and tight loop be completely superposed.Tighten tight loop fastening bolt 5 and 11 respectively, it is ensured that fixing end and force side clamp sample two ends, complete sample and install.
After sample installation, i.e. adjustable force application apparatus carries out pulling force loading.First with bearing pin 13, oscillating bearing 14 and force side collet 12 are attached, horizontal loading apparatus (being i.e. made up of) each component level position is adjusted oscillating bearing 14, ball pivot 16, pull pressure sensor 17, Linear-electric-cylinder bearing 19, Linear-electric-cylinder 21 and slide rail bearing 23 by the second slide rail 24, tighten connecting bolt 22 again, use slide rail bearing fixed block 20 (both sides all have) slide rail bearing and pedestal to be attached simultaneously, i.e. complete whole instrument to connect, sample tensile test can be carried out.
Pulling force charger can start test after having debugged, test can be carried out by two ways, i.e. applies the stretcher strain amount of certain tensile test sample and controls the stretching resistance of certain draw speed test sample.First start Linear-electric-cylinder 21, apply a certain size horizontal pull or draw speed by test requirements document, pass sequentially through pull pressure sensor 17, pulling force is put on sample by ball pivot 16, oscillating bearing 14, bearing pin 13, force side collet 12.The data of Control & data acquisition cabinet 25 Real-time Collection pull pressure sensor 17 and displacement transducer 18 process, and are shown in control panel.Sample, tight loop, collet and Linear-electric-cylinder, slide rail bearing etc. are all supported on slide rail, it is simple to each connector of horizontal adjustment is relative to position, and reduces the gravity impact on process of the test as far as possible, and then improves measuring accuracy.
After off-test, stop Linear-electric-cylinder 21, unclamp bearing pin 13, separate oscillating bearing 14 and force side collet 12, then unclamp tight loop fastening bolt 5 and 11, sample is removed along horizontal slide rail.The plane of disruption intuitively can be observed after sample dismounting, determine sample state, it is thus achieved that precise information, and the collection of beneficially soil sample, for further physical and mechanical parameter test analysis.
Claims (8)
1. an electronic loess tensilometer, it is characterised in that fixing end flanges (2) is connected with pedestal (1)；Fixing end collet (4) is that bolt is connected with fixing end flanges；Fixing end tight loop (6) is connected with tight loop bearing (7) and is installed on the first slide rail (15), can slide along the first slide rail (15)；Sample bearing (8) is installed on the first slide rail (15), can slide along the first slide rail (15)；Force side tight loop (10) is connected with tight loop bearing (9) and is installed on the first slide rail (15), can slide along the first slide rail (15)；Force side collet (12) is connected with oscillating bearing (14)；Oscillating bearing (14) and pull pressure sensor (17) are connected to left side and the right side of ball pivot；Pull pressure sensor (17) is connected with Linear-electric-cylinder (21)；Linear-electric-cylinder (21) and Linear-electric-cylinder bearing (19) thereof are connected with slide rail bearing (23)；Slide rail bearing (23) is installed on the second slide rail (24), can carry out position adjustments along the second slide rail (24)；First slide rail (15) and the second slide rail (24) are connected with pedestal (1) bolt；Slide rail bearing fixed block (20) is used for connecting sliding rail bearing (23) and pedestal (1).
One the most according to claim 1 electronic loess tensilometer, it is characterised in that force side collet (12) has ears sheet.
One the most according to claim 1 electronic loess tensilometer, it is characterised in that fixing end flanges (2) is connected with pedestal (1) by connecting bolt (3).
One the most according to claim 1 electronic loess tensilometer, it is characterised in that force side collet (12) is connected with oscillating bearing (14) by bearing pin (13).
One the most according to claim 1 electronic loess tensilometer, it is characterised in that Linear-electric-cylinder (21) and Linear-electric-cylinder bearing (19) thereof are connected with slide rail bearing (23) by connecting bolt (22).
One the most according to claim 1 electronic loess tensilometer, it is characterized in that, fixing end collet (4) uses claw type flake structure, and fixing end collet (4) has eight bolts hole at center, for being connected with fixing end flanges (2)；This structure has elasticity.
One the most according to claim 1 electronic loess tensilometer, it is characterised in that tight loop is open circles annular, is enclosed within collet；Oval bolt hole it is designed with at opening two ends.
One the most according to claim 1 electronic loess tensilometer, it is characterized in that, force side collet (12) uses claw type flake structure equally, it is ears sheet that force side collet (12) connects interface, is connected with oscillating bearing (14) by bearing pin (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620301918.4U CN205593845U (en) | 2016-04-12 | 2016-04-12 | Electronic loess tensilometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620301918.4U CN205593845U (en) | 2016-04-12 | 2016-04-12 | Electronic loess tensilometer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205593845U true CN205593845U (en) | 2016-09-21 |
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ID=56923102
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620301918.4U Expired - Fee Related CN205593845U (en) | 2016-04-12 | 2016-04-12 | Electronic loess tensilometer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205593845U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105758727A (en) * | 2016-04-12 | 2016-07-13 | 西安石油大学 | Electric loess drawing instrument |
-
2016
- 2016-04-12 CN CN201620301918.4U patent/CN205593845U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105758727A (en) * | 2016-04-12 | 2016-07-13 | 西安石油大学 | Electric loess drawing instrument |
| CN105758727B (en) * | 2016-04-12 | 2019-02-26 | 西安石油大学 | A kind of electronic loess tensilometer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160921 Termination date: 20190412 |