CN108318326A - A kind of miniature static sounding feeler lever - Google Patents
A kind of miniature static sounding feeler lever Download PDFInfo
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- CN108318326A CN108318326A CN201810054055.9A CN201810054055A CN108318326A CN 108318326 A CN108318326 A CN 108318326A CN 201810054055 A CN201810054055 A CN 201810054055A CN 108318326 A CN108318326 A CN 108318326A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D1/00—Investigation of foundation soil in situ
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- Soil Sciences (AREA)
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Abstract
The invention discloses a kind of miniature static sounding feeler levers.Pressure frame is hollow square frame, load cell is placed in inside pressure frame, pressure frame inner top surface is fixed in load cell upper end by running through bolt, sleeve upper end is connected to by being fixedly attached to pressure frame lower end with external screw thread cylinder and wearing in the through-hole at pressure frame lower end center, force-guided stem upper end extend into pressure frame the lower end that load cell is fixedly attached to by half-open external screw thread cylinder after being pierced by sleeve, force-guided stem lower end is fixed with probe, and probe is located at sleeve lower end port and between sleeve by O sealing rings sealing of popping one's head in.The present invention greatly reduces the cost of buying sensor, simplify the design of sonde configuration, reduce the cost of encapsulation process at probe, it ensure that the stability of end resistance test result, be conducive to meet mini Mod test requirements document in the case of not losing feeler lever overall stiffness, increase applicability of present invention on the basis of outdoor or laboratory test existing equipment.
Description
Technical field
The present invention relates to geotechnical engineering investigation fields, and in particular to a kind of miniature static sounding feeler lever.
Background technology
Static sounding refer to static pressure with uniform speed by equipped with load cell rod piece or probe be pressed into the soil body
In the middle, a certain range of soil body nearby of popping one's head in is compressed and failure by shear, while generating penetration resistance to probe.In injection
In the process, since the physico-mechanical properties for burying various soil in the earth formation are different, the resistance encountered of popping one's head in is also different,
Some soil is soft, and resistance is with regard to small, and some soil is hard, and resistance is with regard to big.A kind of performance of the soft or hard exactly mechanical property of soil of soil.So passing through
It is the intensity that soil has been reacted from a side to enter resistance.According to such a internal connection, we are using in rod piece or probe
Load cell, penetration resistance shows it and record by electron measuring recording apparatus, using penetration resistance and
Existing certain relationship between the intensity of soil, it may be determined that the mechanical index of soil profile carries out foundation soil to divide soil layer
Evaluate, shallow ground bearing capacity is provided, bearing course at pile end is selected and estimates bearing capacity of single pile etc., provide required parameter for design.In addition,
Static sounding is also commonly used for indoor model test, can be according to bases such as the compactness of the evaluation of result model soil body of static sounding
This physical parameter.
Static sounding is both a kind of in-situ testing method and a kind of exploration means, and static sounding and conventional probing take
The prospecting schedules such as sample, laboratory test are compared, and are had the characteristics that quick, accurate, economical and are saved manpower.Static sounding is mainly applicable in
In cohesive soil, silty soil and sandy soil.
Static sounding system mainly consists of two parts：First, injection system：It is made of pressue device and counterforce device；Two
It is measurement system：By in probe resistive force sensor and measuring instrument form.Current relatively common static sounding touches
Feeler lever is that load cell is mounted in probe.For example, patent CN201611092442 devise it is a kind of with Yu Haiyang it is quiet
The load cell for measuring static point resistance is mounted in probe by the probe of power feeler inspection；Patent CN201210458273 is related to
A kind of probe for field experience cone penetration test passes through cone by the strain tube inside the foil gauge installation probe of dynamometry
Sharp resistance causes strain tube length or diameter to change, then by foil gauge is converted to electric signal.Static point resistance is surveyed
Force snesor, which is mounted in probe, several drawbacks：First, probe itself is small-sized, so the survey inside probe
Force snesor volume itself also must be sufficiently small, therefore the size selection of load cell is just extremely restricted, it is small and
Often price is relatively high in the sensor of the internal installation requirement of probe for range satisfaction；Internal parts of popping one's head in simultaneously are relatively more,
Extreme difficulties are caused to sonde configuration design, substantially increase probe designs cost；On the other hand, when probe injection to underground water
Or less when, it is necessary to the leakproofness of strict guarantee probe because water or other liquid, which penetrate into probe, likely results in cone
The failure of load cell；Third, since probe internal structure is complicated, the diameter of probe can not possibly be made small, if wanted
Reach the cost that several millimeters of design requirement will greatly increase probe processing and design.Therefore common probe outdoor at present is straight
Diameter is generally all in 30mm or more.However when carrying out geotechnical engineering model test indoors, since model box size is smaller, such as
Universal model case size is length × width × height=600mm × 400mm × 500mm, and probe and being relatively large in diameter for feeler lever certainly will be due to
The test result that the boundary effect of model tank wall influences static sounding (is generally required, when carrying out static sounding in model test, is visited
10 times of probe diameters distances of head centre distance model tank wall are just it is possible to prevente effectively from model casing boundary effect is to the shadow of penetration resistance
Ring), while the soil body response of other ranges in the model soil body can be also significantly affected, such as in major diameter pops one's head in penetration process
The excess pore water pressure variation of model elsewhere can be significantly affected.Therefore it is necessary to adopt minor diameter to visit in model test
Head further increases the accuracy of test result.
It is mounted on the structure design characteristic inside probe based on current load cell, it is so-called currently on the market " miniature "
Static sounding cannot all handle the requirement of probe small size requirement and economy well.
Invention content
In order to solve the problems, such as background technology, the invention discloses one kind both having can be used for outdoor exploration or can
For the miniature static sounding feeler lever of indoor model test, it is primarily useful for carrying out field geology exploration or indoor model experiments
When to the soil body carry out cone penetration test obtain the soil body physical and mechanical parameter.
The technical solution adopted by the present invention is as follows：
The sounding rod includes pressure frame, load cell, sleeve, force-guided stem and probe, and pressure frame is hollow
Square frame, load cell is placed in inside pressure frame, and pressure frame is fixed in load cell upper end by running through bolt
Frame inner top surface, sleeve upper end are fixedly attached to pressure frame lower end and are worn and be connected under pressure frame by band external screw thread cylinder
In the through-hole at end center, force-guided stem upper end is pierced by after sleeve to extend into pressure frame and is fixedly connected by half-open external screw thread cylinder
To the lower end of load cell, force-guided stem lower end is fixed with probe, and probe is located at sleeve lower end port and leads between sleeve
Cross the sealing of probe O sealing rings.
In the present invention, pressure frame is used to the miniature static sounding sounding rod with other driving devices being connected,
To which sounding rod indentation or extraction test material are carried out cone penetration test under the effect of the power of driving device.Sleeve
For to separate the force-guided stem and the experiment soil body in penetration process, that is, realizing the separation of end resistance and side resistance, from
And ensure the accuracy of end resistance measurement result.Force-guided stem is mainly used for the penetration resistance being subject to during the injection soil body that will pop one's head in
Load cell is transmitted to be perceived and recorded.
The pressure frame top center is provided with center and runs through screw hole, and upper center is bored through screw hole top by annular
Face transition is connected to pressure frame top end face, and upper center is run through through screw hole lower end to be communicated to inside pressure frame, pressure frame
Upper end be provided with tapped blind hole, the tapped blind hole of pressure frame upper end and upper centre are bolted between screw hole by running through.
The upper center is opened on the pressure frame top end face around screw hole there are four screw hole is run through, and four pass through
Screw hole is worn around upper center through the circumferential uniformly distributed arrangement of screw hole, for pressure frame to be connect with external driver device, outside is driven
Dynamic device for example can be can be so that the apparatus that entire static sounding feeler lever power is pressed into.
The sleeve is absolute rigidity body, so that miniature static sounding feeler lever does not bend after extending into the soil body.
Pressure frame lower face center is provided with lower center and runs through screw hole, and sleeve upper end is coaxially welded with external screw thread cylinder
Fixation is connect, band external screw thread cylinder is run through in lower center in screw hole by thread set, and is stretched into band external screw thread cylinder upper end
Part in pressure frame and the part stretched out outside pressure frame with external screw thread cylinder lower end cover and load fixing nut, under
Fixing nut axial locking band external screw thread cylinder carries out axial restraint.
The lower fixing nut and with being equipped with washer between external screw thread cylinder.
The sleeve act as detaching the force-guided stem with the soil body in penetration process.The sleeve is hollow
Cylindrical structure, the both ends inner diameter of sleeve is identical but both ends outer diameter is different, and sleeve upper end outer diameter is more than lower end
Outer diameter.
The position of the sleeve variable cross-section and angle are determined according to cavity expansion theory.
The force-guided stem be upper end closed, lower end trepanning rod-like structure, probe upper end is by thread set in leading power
In the trepanning of bar lower end, pass through O-shaped sealing of popping one's head between probe and sleeve after the trepanning of the screw rod screw-in force-guided stem for upper end of popping one's head in
Circle sealing；Force-guided stem upper end passes through sleeve and justifies with being extend into pressure frame after external screw thread cylinder and being set in half-open external screw thread
In cylinder bottom, half-open external screw thread cylinder is mainly formed by a pair of of hemizonid, with the docking of externally threaded cylinder piece, half-open external screw thread cylinder
Bottom housing loads onto fixing nut, is consolidated force-guided stem upper end and half-open external screw thread bottom of cylinder with axis clamping by upper fixing nut
It is fixed；Load cell bottom is provided with tapped blind hole, and the screw thread that half-open external screw thread cylinder upper end set is packed into load cell bottom is blind
It is axially locked behind hole by controlling power nut, control power nut is set with outside the end of half-open external screw thread cylinder upper end.
The hole bottom of the force-guided stem lower end trepanning is recessed the space of accommodating liquid.
The both ends end of the force-guided stem is respectively opened up there are one O-ring seal annular groove is positioned, and positions O-ring seal ring
The positioning O-ring seal to match with annular groove width is installed, positioning O-ring seal periphery is connected to sleeve lining, fixed in slot
The race diameter of position O-ring seal is equal to barrel bore diameter, and shape is connected by positioning O-ring seal between force-guided stem and sleeve
At redundant structure.
Axially spaced distance offers multiple anti-skidding O-ring seal annular grooves, anti-skidding O-shaped sealing in the middle part of the force-guided stem
The anti-skidding O-ring seal to match with annular groove width is installed, anti-skidding O-ring seal periphery is connected in sleeve in ring slot
Wall.
In specific implementation, the width of intermediate anti-skidding O-ring seal annular groove is smaller and specification is identical；It is located at force-guided stem
Two positioning O-ring seal annular groove width at both ends are larger.
The probe visits end downward, and be the conical structure that apex angle is 60 °, probe upper end for externally threaded screw rod,
It is set with the screw-internal thread fit of force-guided stem lower end trepanning.
The load cell be it is a kind of have the counter-force being subject at the top of force-guided stem is transformed into passing for other electric signals
Sensor, including but not limited to currently used strain gauge transducer.
Load cell and probe separation are attached by the present invention by structure settings such as sleeve and force-guided stems, are avoided
Tradition probe position installation load cell after cause complicated mounting structure, and cleverly set it is each probe and sleeve it
Between sealing ring and force-guided stem and sleeve between sealing ring so that whole miniature static sounding feeler lever forms indeterminate knot
Structure, and the length that force-guided stem upper end screws in load cell lower thread blind hole is adjusted by screwing control power nut, and then adjust
The pretightning force of probe and O-ring seal that force-guided stem lower end is fixedly connected so that detection is accurate.
The pressure frame is metal material, it is preferred that aluminium stainless steel alloy material, it is light high-strength.
The beneficial effects of the invention are as follows：
1) present invention uses the rear-mounted arrangement of load cell, and only solid conical structure of popping one's head in, inside is not pacified
The load cell and sensor for pore water pressure of dress, therefore sonde configuration is simpler, cost of manufacture substantially reduces；
2) load cell is mounted on probe inside, the rear-mounted cloth of load cell of the present invention compared to traditional feeler lever
It sets, load cell will not enter injection inside soil body during entire feeler inspection, therefore neighbouring sealing requirements of popping one's head in
It is not high, be conducive to reduce the probe increased manufacturing cost because of stringent sealing nearby；
3) load cell is placed in pressure frame by the present invention, therefore is not required the size of load cell,
Small size load cell must be selected to be installed on probe inside compared to traditional feeler lever, it can be a greater degree of cost-effective；
4) because sonde configuration it is simple, therefore the size popped one's head in can be made small, and the diameter of probe can be accomplished several
Millimeter, such feeler lever can also be made thin, therefore more meet indoor model test to the more thinner better requirement of feeler lever diameter,
Be conducive to the boundary effect for preferably evading model casing and reduce the influence of the response to model other parts；
5) telescopic design is used, force-guided stem is detached with the model soil body, is conducive to improve the accurate of measurement end resistance result
Property；
6) the sleeve overall diameter of sense of touch bar is designed using variable cross-section makes the feeler lever diameter of probe segment smaller, is conducive to subtract
The small disturbance to the original-pack experiment soil body；Simultaneously sounding rod external wall of upper portion be relatively large in diameter, be conducive to feeler inspection pole length it is larger when still
Keep good rigidity, avoid during the test feeler lever bend；
7) it being in contact by annular groove and O-ring seal between force-guided stem and sleeve so that force-guided stem forms redundant structure,
The rigidity for increasing force-guided stem, avoid during the test force-guided stem bend；
8) present invention is connected with driving device or original static sounding injection structure by bolt using pressure frame,
Increase applicability of present invention on the basis of outdoor or laboratory test existing equipment.
Description of the drawings
Fig. 1 is miniature static sounding sounding rod schematic diagram of the present invention.
Fig. 2 (a) is the elevational cross-sectional view of pressure frame structure of the present invention.
Fig. 2 (b) is the vertical view of pressure frame structure of the present invention.
Fig. 3 is tube-in-tube structure schematic diagram of the present invention.
Fig. 4 is pressure frame lower end, sleeve and force-guided stem disassembly diagram of the present invention.
Fig. 5 is force-guided stem structural schematic diagram of the present invention.
Fig. 6 is that pressure frame, load cell, force-guided stem upper end and the installation explosion of sleeve upper end formation of the present invention are shown
It is intended to.
Fig. 7 is force-guided stem lower end of the present invention and probe scheme of installation.
In figure：1, pressure frame；2, load cell；3, sleeve；4, force-guided stem；5, probe；6, O-ring seal of popping one's head in；
7, position O-ring seal；8, anti-skidding O-ring seal；9, anti-skidding O-ring seal annular groove；10, half-open external screw thread cylinder；11, run through
Screw hole；12, run through bolt；13, band external screw thread cylinder；14, control power nut；15, upper fixing nut；16, lower fixing nut；17,
Washer；18, position O-ring seal annular groove；19, screw hole is run through in lower center；20, screw hole is run through in upper center.
Specific implementation mode
It is described further with reference to the accompanying drawings and examples.Following embodiment be merely to illustrate the present invention rather than
It limits the scope of the invention.Further, it should be understood that after reading the content taught by the present invention, those skilled in the art can be with
The present invention is made various changes or modifications, such equivalent forms equally fall within model defined by the application the appended claims
It encloses.
As shown in Figure 1, sounding rod includes pressure frame 1, load cell 2, sleeve 3, force-guided stem 4 and probe 5, pressure frame
Frame 1 is hollow square frame, and load cell 2 is placed in inside pressure frame 1, and 2 upper end of load cell is by running through bolt
12 are fixed on 1 inner top surface of pressure frame, and 5 upper end of sleeve is fixedly attached to 1 lower end of pressure frame simultaneously by band external screw thread cylinder 13
It wears and is connected in the through-hole at 1 lower end center of pressure frame, 4 upper end of force-guided stem is stretched into after being pierced by sleeve 3, band external screw thread cylinder 13
The lower end of load cell 2 is fixedly attached in pressure frame 1 by half-open external screw thread cylinder 10,4 lower end of force-guided stem is fixed
There are probe 5, probe 5 to be located at 3 lower end port of sleeve and sealed by O sealing rings 6 of popping one's head between sleeve 3.
As depicted in figs. 1 and 2,1 top center of pressure frame is provided with center through screw hole 20, and screw hole 20 is run through in upper center
Top is connected to 1 top end face of pressure frame by circular cone transition, and upper center is run through through 20 lower end of screw hole is communicated to pressure
Inside frame 1, upper center is through screw hole 20 for consolidating pressure frame 1 and the cylinder 13 with external screw thread spiral of 3 upper end of sleeve
Fixed connection, the upper end of pressure frame 1 be provided with tapped blind hole, the tapped blind hole of 1 upper end of pressure frame and upper centre through screw hole 20 it
Between by run through bolt 12 connect.
As shown in Fig. 2 (a), upper center opens that there are four run through screw hole on 1 top end face of pressure frame around the screw hole 20
11, four run through the circumferential uniformly distributed arrangement of screw hole 20 through screw hole 11 around upper center, for filling pressure frame 1 and external drive
Connection is set, external driver device for example can be can be so that the apparatus that entire static sounding feeler lever power is pressed into.
As shown in Fig. 2 (b), 1 lower face center of pressure frame be provided with it is lower center run through screw hole 19,3 upper end of sleeve with outer
13 coaxial welding of threaded barrel is fixed, as shown in figure 4, running through screw hole 19 in lower center by thread set with external screw thread cylinder 13
In, and stretching into the part in pressure frame 1 with 13 upper end of external screw thread cylinder and stretching out pressure with 13 lower end of external screw thread cylinder
Part outside frame 1, which covers, loads fixing nut 16, and axis is carried out by lower fixing nut 16 axial locking band external screw thread cylinder 13
To fixation.
19 length of screw hole is run through in the lower center that length with external screw thread cylinder 13 is more than pressure frame lower end.Lower fixing nut
16 and with being equipped with washer 17 between external screw thread cylinder 13,13 upper end of sleeve and pressure frame lower end screwed by screw thread after in cylinder
Both ends are further fastened with the washer 17 and fixing nut 16 to match.
As shown in figure 3, sleeve 3 is hollow cylindrical structure, the both ends inner diameter of sleeve 3 is identical but both ends outer diameter
Difference, 3 upper end outer diameter of sleeve is more than lower end outer wall diameter, and diameter transition, set can be arranged at the outer wall at 3 middle part of sleeve
The larger rigidity for being conducive to improve sleeve entirety of cylinder upper end diameter, to model clay when sleeve lower end minor diameter is conducive to reduce experiment
The disturbance of body.In specific implementation, the changed position of sleeve outer diameter and transition angle are determined according to cavity expansion theory, outer diameter
The distance 100mm of changed positional distance sleeve lower end, transition angle, θ select 160 degree.
As shown in fig. 7, force-guided stem 4 is upper end closed, the rod-like structure of lower end trepanning, 5 upper ends of probe pass through thread set
In in 4 lower end trepanning of force-guided stem, specifically 4 lower end of force-guided stem is equipped with internal thread, and 5 upper ends of probe are equipped with external screw thread, force-guided stem 4
Lower end is equipped with internal thread, and 5 upper ends of probe are equipped with externally threaded screw rod, the internal thread of force-guided stem 4 and the external screw thread phase of screw rod
Match；When force-guided stem is connected with probe, probe upper end screw rod screws into the threaded hole of force-guided stem lower end internal thread；Probe
It is sealed by O-ring seal 6 of popping one's head between probe 5 and sleeve 3 after the trepanning of the screw rod screw-in force-guided stem of 5 upper ends, on the one hand
Prevent soil body particle and liquid during the feeler lever injection soil body from entering barrel bore, on the other hand so that between probe 5 and sleeve 3
With pretightning force so that miniature static sounding measurement by sound accuracy；Probe O-ring 6 between probe 5 and sleeve 3 is tried in injection
It needs to add certain pretightning force before testing, effect is to reduce the gap between probe and sleeve, increases the one of test result
Cause property.
The hole bottom of 4 lower end trepanning of force-guided stem is recessed the space of accommodating liquid, this space is for preventing in injection
Liquid fluid pressure after ambient pressure effect is pushed down into force-guided stem female end increases force-guided stem end resistance and influences to try in journey
Test result.
4 upper end of force-guided stem passes through sleeve 3 and with extending into pressure frame 1 and be set in over half after external screw thread cylinder 13
In 10 bottom of threaded barrel, half-open external screw thread cylinder 10 is mainly formed by a pair of of hemizonid, with the docking of externally threaded cylinder piece, half-open
10 bottom housing of external screw thread cylinder loads onto fixing nut 15, by upper fixing nut 15 by 4 upper end of force-guided stem and half-open external screw thread
10 bottom of cylinder is coaxially fixedly clamped；
As shown in fig. 6,2 bottom of load cell is provided with tapped blind hole, half-open 10 upper end of external screw thread cylinder set is packed into dynamometry
It is fixed after the tapped blind hole of 2 bottom of sensor by controlling 14 axial locking of power nut, outside 10 upper end end of half-open external screw thread cylinder
It is set with control power nut 14.
As shown in figure 5, the both ends end of force-guided stem 4 is respectively opened up there are one positioning O-ring seal annular groove 18, positioning is O-shaped
The positioning O-ring seal 7 to match with annular groove width is installed, 7 periphery of positioning O-ring seal is connected in sealing ring annular groove 18
The race diameter of 3 inner wall of sleeve, positioning O-ring seal 7 is equal to 3 intracavity diameter of sleeve, by fixed between force-guided stem 4 and sleeve 3
The position connection of O-ring seal 7 forms redundant structure.The positioning effect of O-ring seal 7 is that whole force-guided stem is made to form indeterminate knot
Structure increases the rigidity of feeler lever to avoid that buckling occurs during probeing into, and the effect of annular groove is to prevent force-guided stem to sleeve
O-ring seal slides when middle installation, and can guarantee whole force-guided stem in the centre position of barrel bore.
As shown in figure 5, the 4 axially spaced distance in middle part of force-guided stem offers multiple anti-skidding O-ring seal annular grooves 9, anti-skidding O
The anti-skidding O-ring seal 8 to match with annular groove width, the connection of 8 periphery of anti-skidding O-ring seal are installed in type sealing ring annular groove 9
In 3 inner wall of sleeve, 8 race diameter of anti-skidding O-ring seal is slightly less than 3 intracavity diameter of sleeve, to reduce between sleeve and force-guided stem
Frictional force, when the effect of annular groove is to prevent force-guided stem from installing into sleeve O-ring seal slide.
The width of anti-skidding O-ring seal annular groove 9 among force-guided stem 4 is smaller and specification is identical, and in specific implementation, annular groove is wide
Degree is 0.76mm, and the distance between two neighboring annular groove is 100mm；Two positioning nearest apart from force-guided stem both ends are O-shaped respectively
7 width of sealing ring annular groove is larger, is 1mm in specific implementation, and upper and lower ends annular groove is respectively 5mm and 7mm apart from end distance.
As shown in fig. 7, probe 5 visits end downward, and it is the conical structure that apex angle is 60 °, 5 upper ends of probe are with externally threaded
Screw rod is set with the screw-internal thread fit of 4 lower end trepanning of force-guided stem.
2 shape of load cell offers the internal thread of certain depth in top and bottom, is respectively used to by repacking
It is connected with pressure frame 1 and force-guided stem 4；The depth for the internal thread that load cell lower end opens up is greater than force-guided stem upper end half
That opens screws in the length of load cell lower end internal thread with external screw thread cylinder 10.
The miniature static sounding sounding rod of the present invention only measures static point resistance during the injection soil body, and sounding rod is in injection
In the process, 5 soil body resistance that is subject to of probe is directly transmitted to load cell 2 by force-guided stem 4, load cell 2 pass through by
This pressure is converted to electric signal, by data line by this electric signal transmission to the terminal with data acquisition and processing (DAP) ability.Tool
Have the terminal of data acquisition and processing (DAP) ability include but not limited to notebook, computer or other with data acquire and locate
The mobile intelligent terminal of reason ability.
Miniature static sounding sounding rod can be filled by four of 1 upper end of pressure frame through convenient driven with other of screw hole 11
It sets and is attached；When being attached with existing static sounding device, it is only necessary to the feeler lever of static sounding device is dismantled, it will
Pressure frame 1 is simply connect with the driving device of static sounding device, more convenient.
Miniature static sounding sounding rod is determined using advance rower, and calibration mode is：It calibrates and leads power in penetration process
O-ring seal 7,8 between bar and barrel bore and the frictional force △ P between barrel bore, in the record knot of load cell 2
Frictional force △ P are subtracted in fruit.
Claims (10)
1. a kind of miniature static sounding feeler lever, it is characterised in that：The sounding rod includes pressure frame (1), load cell
(2), sleeve (3), force-guided stem (4) and probe (5), pressure frame (1) are hollow square frame, and load cell (2) is placed in
Pressure frame (1) is internal, and pressure frame (1) inner top surface, sleeve are fixed in load cell (2) upper end by running through bolt (12)
(5) upper end is fixedly attached to pressure frame (1) lower end and is worn and is connected under pressure frame (1) by band external screw thread cylinder (13)
In the through-hole at end center, force-guided stem (4) upper end is pierced by after sleeve (3) to extend into pressure frame (1) is justified by half-open external screw thread
Cylinder (10) is fixedly attached to the lower end of load cell (2), and force-guided stem (4) lower end is fixed with probe (5), and probe (5) is located at set
It is sealed at cylinder (3) lower end port and by O sealing rings (6) of popping one's head between sleeve (3).
2. a kind of miniature static sounding feeler lever according to claim 1, it is characterised in that：Pressure frame (1) top
Portion center is provided with center and runs through screw hole (20), and upper center is connected to pressure through screw hole (20) top by circular cone transition
Frame (1) top end face, upper center is internal through pressure frame (1) is communicated to through screw hole (20) lower end, pressure frame (1) it is upper
End is provided with tapped blind hole, and the tapped blind hole of pressure frame (1) upper end and upper center are run through between screw hole (20) by running through bolt
(12) it connects.
3. a kind of miniature static sounding feeler lever according to claim 1, it is characterised in that：Screw hole is run through in the upper center
(20) it is opened on the pressure frame (1) top end face around there are four screw hole (11) is run through, four through screw hole (11) around upper
Center is through the circumferential uniformly distributed arrangement of screw hole (20), for pressure frame 1 to be connect with external driver device, external driver device example
Such as can be can be so that the apparatus that entire static sounding feeler lever power is pressed into.
4. a kind of miniature static sounding feeler lever according to claim 1, it is characterised in that：Pressure frame (1) lower end
Face center is provided with lower center and runs through screw hole (19), and sleeve (3) upper end is fixed with external screw thread cylinder (13) coaxial welding, with outer spiral shell
Line cylinder (13) is run through in lower center in screw hole (19) by thread set, and is stretching into pressure in band external screw thread cylinder (13) upper end
Part in power frame (1) and the part with external screw thread cylinder (13) lower end stretching pressure frame (1) outside, which cover, loads fixed spiral shell
Female (16) carry out axial restraint by lower fixing nut (16) axial locking band external screw thread cylinder (13).
5. a kind of miniature static sounding feeler lever according to claim 4, it is characterised in that：The lower fixing nut (16)
Washer (17) is equipped between band external screw thread cylinder (13).
6. a kind of miniature static sounding feeler lever according to claim 1, it is characterised in that：The sleeve (3) is hollow
Cylindrical structure, the both ends inner diameter of sleeve (3) is identical but both ends outer diameter is different, and sleeve (3) upper end outer diameter is big
In lower end outer wall diameter.
7. a kind of miniature static sounding feeler lever according to claim 1, it is characterised in that：The force-guided stem (4) is upper
End seal closes, the rod-like structure of lower end trepanning, probe (5) upper end by thread set in force-guided stem (4) lower end trepanning, force-guided stem
(4) the hole bottom of lower end trepanning is recessed the space that can house liquid, and the screw rod of probe (5) upper end screws in opening for force-guided stem
It is sealed by O-ring seal (6) of popping one's head between probe (5) and sleeve (3) behind hole；Force-guided stem (4) upper end pass through sleeve (3) and
It extend into pressure frame (1) and is set in half-open external screw thread cylinder (10) bottom after band external screw thread cylinder (13), over half
Threaded barrel (10) is mainly formed by a pair of of hemizonid, with the docking of externally threaded cylinder piece, outside half-open external screw thread cylinder (10) bottom
Set loads onto fixing nut (15), by upper fixing nut (15) by force-guided stem (4) upper end and half-open external screw thread cylinder (10) bottom
Coaxially it is fixedly clamped；Load cell (2) bottom is provided with tapped blind hole, and half-open external screw thread cylinder (10) upper end set is packed into dynamometry and passes
It is fixed after the tapped blind hole of sensor (2) bottom by controlling power nut (14) axial locking, half-open external screw thread cylinder (10) upper end end
Control power nut (14) is set with outside portion.
8. a kind of miniature static sounding feeler lever according to claim 1, it is characterised in that：The two of the force-guided stem (4)
End end is respectively opened up there are one positioning O-ring seal annular groove (18), is equipped in positioning O-ring seal annular groove (18) and annular groove
The positioning O-ring seal (7) that width matches, positioning O-ring seal (7) periphery are connected to sleeve (3) inner wall, and positioning is O-shaped close
The race diameter of seal (7) is equal to sleeve (3) intracavity diameter, by positioning O-ring seal between force-guided stem (4) and sleeve (3)
(7) connection forms redundant structure.
9. a kind of miniature static sounding feeler lever according to claim 1, it is characterised in that：In the middle part of the force-guided stem (4)
Axially spaced distance offers multiple anti-skidding O-ring seal annular grooves (9), is equipped in anti-skidding O-ring seal annular groove (9) and ring
The anti-skidding O-ring seal (8) that well width matches, anti-skidding O-ring seal (8) periphery are connected to sleeve (3) inner wall.
10. a kind of miniature static sounding feeler lever according to claim 1, it is characterised in that：The probe (5) visits end court
Under, and be the conical structure that apex angle is 60 °, probe (5) upper end is with externally threaded screw rod, with force-guided stem (4) lower end trepanning
Screw-internal thread fit is set with.
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| CN201810054055.9A CN108318326B (en) | 2018-01-19 | 2018-01-19 | Miniature static sounding probe rod |
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| CN201810054055.9A CN108318326B (en) | 2018-01-19 | 2018-01-19 | Miniature static sounding probe rod |
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| CN108318326B CN108318326B (en) | 2020-11-20 |
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| CN109577386A (en) * | 2018-12-27 | 2019-04-05 | 佛山科学技术学院 | A kind of fixation device of inclinometer pipe |
| CN111577360A (en) * | 2020-06-12 | 2020-08-25 | 中南大学 | Recoverable acquisition instrument for real-time observation of stress characteristic and vibration characteristic of stope surrounding rock and use method |
| WO2022021066A1 (en) * | 2020-07-28 | 2022-02-03 | 浙江大学 | Submarine mobile cptu sounding equipment |
| CN114323907A (en) * | 2021-11-12 | 2022-04-12 | 中国电建集团中南勘测设计研究院有限公司 | Rod length correction method of probe rod for ultra-deep dynamic penetration test and probe rod |
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| CN111577360A (en) * | 2020-06-12 | 2020-08-25 | 中南大学 | Recoverable acquisition instrument for real-time observation of stress characteristic and vibration characteristic of stope surrounding rock and use method |
| CN111577360B (en) * | 2020-06-12 | 2021-04-27 | 中南大学 | Use method of recoverable acquisition instrument for real-time observation of stress characteristic and vibration characteristic of stope surrounding rock |
| WO2022021066A1 (en) * | 2020-07-28 | 2022-02-03 | 浙江大学 | Submarine mobile cptu sounding equipment |
| CN114323907A (en) * | 2021-11-12 | 2022-04-12 | 中国电建集团中南勘测设计研究院有限公司 | Rod length correction method of probe rod for ultra-deep dynamic penetration test and probe rod |
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