CN109085040A - A kind of three axis sample preparation device of compacting process and method - Google Patents

A kind of three axis sample preparation device of compacting process and method Download PDF

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Publication number
CN109085040A
CN109085040A CN201811179680.2A CN201811179680A CN109085040A CN 109085040 A CN109085040 A CN 109085040A CN 201811179680 A CN201811179680 A CN 201811179680A CN 109085040 A CN109085040 A CN 109085040A
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China
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guide rod
sample
fixed
hammer
hit
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Inventor
贾亮
郭健
李春祥
赵方粒
连尚承
张文耀
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Lanzhou University of Technology
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Lanzhou University of Technology
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Priority to CN201811179680.2A priority Critical patent/CN109085040A/en
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00Sampling; Preparing specimens for investigation
    • G01N1/28Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
    • G01N1/286Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising

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  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Sampling And Sample Adjustment (AREA)

Abstract

The present invention relates to a kind of three axis sample preparation device of compacting process and methods, described device includes the fixed frame being fixed on pedestal, power supplying apparatus and hits sampling device, the power supplying apparatus includes the driving wheel with rocking handle being linked together by transmission belt, upper driven wheel and lower driven wheel, is fixedly connected with shadoof on the transmission belt;The sampling device that hits includes hitting sample cylinder, guide rod and hammer, the lower end of the guide rod, which is sequentially passed through, to be connect positioned at the positioning ring and hammer hit above sample cylinder with hammer seat, the upper end is placed through the guide rod fixed plate center at fixed frame top plate cantilever, and the positioning ring can be connected with guide rod and shadoof respectively.The device of the invention and method can make the dropping process of hammer close to free-falling, and the height to fall every time is consistent, it eliminates guide rod inclination, each layer in the prior art and hits the disadvantages of real process is uneven, improve the uniformity of sample, while keeping sample making course relatively reliable, convenient.

Description

A kind of three axis sample preparation device of compacting process and method
Technical field
The present invention relates to soil test device and method, and in particular to the preparation facilities and method of three axis sample of disturbed soil.
Background technique
Triaxial test is the conventional means of soil body Mechanics Performance Testing, and sample preparation includes taking soil, air-drying, roll, mistake It sieves, with native, sample preparation, wherein sample preparation is key link.Three axis preparation method of sample being recommended to use in existing regulation are It is layered compacting process, i.e., soil sample points 5 layers is hit into reality in compaction cylinder with hitting the hammer of solid plate;After having hit the last layer, it will hit Sample preparation is completed in the leveling of sample both ends in real cylinder.Since hitting for every layer of soil sample is real by manual operation, during hitting reality It is easy to appear operator's hand fatigue, hammer slides from hand, causes each layer soil sample compactive effort to differ, influences the uniform of sample Property.Simultaneously be also difficult to guarantee hammer guide rod kept during hitting reality vertically, cause each layer soil sample surface unhorizontal and need to be to sample End face carries out leveling processing, to reduce the uniformity on sample end face surface layer.In view of the above-mentioned problems, Authorization Notice No. is The utility model patent of CN206974712U devises a kind of hand-rail type soil compaction sampler, including appliance stand be set to Cutting ring in described device bracket, described device further include: gear set is set up on described device bracket;It shakes the hand, described in connection Gear set, for driving the gear set to rotate;Hammering hammer, connects the gear set, and pass through the gear set drive Tap the cutting ring.Although drive gear set and hammering hammer when rotation is shaken the hand can be made to make reciprocal hammer using the device Movement is hit, but since the frictional force of the pulling force and appliance stand upward by lifting rope is hammered in hammering into shape, does not ensure that hammering hammer The dynamics tapped every time is completely the same.And in the prior art, another Authorization Notice No. is that the utility model of CN204718863U is special Benefit discloses a kind of geotechnical sample and draws a design device, including fixed pedestal, two columns, crossbeam, gear, rackwork, handle, hammer and Sampling die;On the two column fixed pedestals, and the upper end of two columns is fixedly installed with a crossbeam;It is equipped in the middle part of crossbeam One guide rod and a gear installation base;The guide rod is equipped with guide sleeve, the upper end of the rackwork and guide sleeve Connection, the lower end of rackwork is connect with hammer;Gear is mounted on gear installation base, the engagement of wheel and rack mechanism, gear It is connect with handle;Sampling die is mounted in fixed base, positioned at the underface of hammer.Although the device can by gear, Rackwork drives the hammer freely falling body of lower section to draw a design, and reduces the frictional force between sample and sampling die, and part solves Every layer of the problem of hitting real discontinuity in production specimen, but the frictional force between its wheel and rack for using compared with Greatly, especially when hammer downward draw a design by freely falling body, the frictional force between said gear and rack gear will undoubtedly will affect hammer Freely falling body process, or even interrupt freely falling body process, not only influence test data accuracy and reliability, but also need pair The timely maintenance of the device, especially gear and rack teeth mechanism.
Summary of the invention
It is an object of the invention to overcome the deficiencies in the prior art, propose that a kind of structure is simple, sample making course is relatively reliable Convenient and fast three axis sample preparation device of compacting process and method.
Three axis sample preparation device of compacting process of the invention, including be fixed on pedestal fixed frame, be respectively arranged on fixation Power supplying apparatus on frame and pedestal and sampling device is hit, the power supplying apparatus includes that fixation is fixed in distribution triangular in shape Driving wheel, upper driven wheel and lower driven wheel on frame, driving wheel, upper driven wheel and lower driven wheel are linked together by transmission belt, Shadoof is fixedly connected on the transmission belt, it is fixed frame top plate, bottom surface at the top of fixed frame that the driving wheel, which is equipped with rocking handle, Higher than the top of upper driven wheel;
The sampling device that hits includes being bolted by pull rod in hitting sample cylinder, guide rod and hammer on pedestal, described to lead The lower end of bar, which is sequentially passed through, to be connect positioned at the positioning ring and hammer hit above sample cylinder with hammer seat, and the upper end is placed through fixed frame top Guide rod fixed plate center at plate cantilever, the positioning ring can be connected with guide rod and shadoof respectively.
Further, three axis sample preparation device of compacting process of the invention, the upper driven wheel is identical with lower driven wheel size, And center is located on same vertical line, driving wheel is located at the left side of above-mentioned vertical line, is in isoceles triangle with upper driven wheel and lower driven wheel Shape distribution.
Further, three axis sample preparation device of compacting process of the invention, the inside two sides of the positioning ring are respectively equipped with bullet Spring pin and fixed thin slice, the spring catch are located at close to the side of transmission belt, and spring catch is a cone close to one end of guide rod Thin slice, the vertex of a cone are contacted with guide rod;Fixation thin slice positioned at the positioning ring other side is similarly a conical thin slice, and the vertex of a cone, which is located at, leads In bar groove, the inner sidewall of positioning ring is fixed at cone bottom, and the conical thin slice on spring catch is identical as fixed sheet thickness;It is described Spring catch bottom can be contacted with shadoof upper surface, and contact length is slightly less than the length of shadoof.
Further, three axis sample preparation device of compacting process of the invention, the two sides of the guide rod are respectively equipped with and positioning ring On conical thin slice and the corresponding circular groove of fixed thin slice, it is consistent with the depth of groove of fixed thin slice cooperation and far Less than guide rod radius, the groove with the cooperation of conical thin slice is the groove of a depth gradual change, and bottom depth is 0, top depth Less than the diameter of guide rod, and two groove start-stop position consistencies.
Further, three axis sample preparation device of compacting process of the invention, the guide rod fixed plate is interior to be equipped with two identical bullets Spring pin, pin core are cylindrical body, and pin top one end is hemispherical, and radius is identical as arc groove radius on guide rod and connects with guide rod Touching, the other end is located in guide rod fixed plate inner cylinder hole, and two spring catch are located in same horizontal line, and guide rod fixed plate, leads Bar and the center of sample cylinder is hit on same vertical line.
A kind of three axis preparation method of sample of compacting process, which is characterized in that described method includes following steps:
1) according to the compactness and size of made sample, the quality of soil needed for calculating, and soil is equally divided into five parts;
2) guide rod is promoted, hammer and hammer seat are fixed on by fixed frame top plate cantilever bottom by guide rod fixed plate, installation is hit After sample cylinder, bolt is tightened;
3) first layer soil weight is weighed up, pours into and hits in sample cylinder, strokes grading face, guide rod top is caught to hammer into shape seating in soil sample table Face at the uniform velocity shakes rocking handle counterclockwise and starts to hit sample, generally hits 25-27 times (it is consistent to ensure that every layer of soil sample hits number);
4) guide rod is then promoted again, hammer and hammer seat are fixed on and are hit above sample cylinder, with scraper by table in this layer of soil sample Hair is dug in face, starts second layer soil sample compacting, repeats the step in step 3);
5) remaining three layers of production repeats step 3) with step 4), is sequentially completed the production of soil sample;
6) after the completion of the last layer hits reality, guide rod is promoted, hammer and hammer seat are fixed on and are hit above sample cylinder, spiral shell is unclamped Bolt is removed and hits sample cylinder, after removing casing, is rebuild soil sample both ends with scraper, makes it and hits sample cylinder both ends and flush, then demoulds.
Compared with prior art, the invention has the following beneficial technical effects:
Three axis sample preparation device of a kind of compacting process of the invention and method, by using conveyer belt as dynamic with rocking handle Power provides device, so that shadoof turns in lower position and the spring pin contacts that positioning ring side is arranged in, and with driving wheel It is dynamic that shadoof is driven to rise, to drive fixed hammer and the guide rod of hammer seat to rise, and the spring of shadoof and positioning ring side Pin can be separated by the arc groove that is arranged on guide rod in certain altitude, so that the dropping process of hammer is close to free-falling, In addition to two spring catch domed tops in guide rod fixed plate and the point contact between guide rod, not by additional belt wheel or contact The influence of frictional force, and the height to fall every time is consistent.It eliminates the inclination of guide rod caused by human factor and each layer hits real mistake Journey is uneven, and the disadvantage that dynamics does not wait improves the uniformity of sample, while keeping sample making course relatively reliable, convenient.
Detailed description of the invention
Fig. 1 is schematic structural view of the invention;
Fig. 2 is Fig. 1 shown device side view;
Fig. 3 is the structural schematic diagram of fixed frame top plate 1 and guide rod fixed plate 2;
Fig. 4 is the structural schematic diagram of hammer 15, hammer seat 16 and positioning ring 9;
Fig. 5 is Fig. 4 side view;
Fig. 6 is 9 structural schematic diagram of positioning ring;
Fig. 7 is Fig. 6 top view;
Fig. 8 is 6 structural schematic diagram of guide rod;
Fig. 9 is the structural schematic diagram of the part 1-1 to 2-2 of guide rod 6 in Fig. 8;
Figure 10 is Fig. 9 side view;
Figure 11 is the section 1-1 cross-sectional view of guide rod 6 in Fig. 8;
Figure 12 is the section 2-2 cross-sectional view of guide rod 6 in Fig. 8;
Figure 13 is the structural schematic diagram of guide rod fixed plate 2;
Figure 14 is Figure 13 side view.
Wherein: 1. fixed frame top plates;2. guide rod fixed plate;Driven wheel on 3.;4. transmission belt;5. rocking handle;6. guide rod;7. passing Driving wheel;8. shadoof;9. positioning ring;10. bolt;11. hitting sample cylinder;12. lower driven wheel;13. fixed frame;14. pull rod;15. hammer; 16. hammering seat into shape;17. pedestal.
Specific embodiment
Below with reference to specific embodiment, the present invention is described in further detail.
As shown in Fig. 1-Figure 14, three axis sample preparation device of a kind of compacting process of the invention, including be fixed on pedestal 17 Fixed frame 13, the power supplying apparatus that is respectively arranged on fixed frame 13 and pedestal 17 and hit sampling device, the power provides dress Set and be distributed the driving wheel 7, upper driven wheel 3 and the lower driven wheel 12 that are fixed on fixed frame 13 including triangular in shape, driving wheel 7, on Driven wheel 3 and lower driven wheel 12 are linked together by transmission belt 4, and shadoof 8, the transmission are fixedly connected on the transmission belt 4 Wheel 7 is equipped with rocking handle 5, is fixed frame top plate 1 at the top of fixed frame, and bottom surface is higher than the top of upper driven wheel 3;
The sampling device that hits includes being fixed on hitting sample cylinder 11, guide rod 6 and hit on pedestal 17 by bolt 10 by pull rod 14 Hammer 15, the lower end of the guide rod 6, which is sequentially passed through, to be connect positioned at the positioning ring 9 and hammer 15 for hitting 11 top of sample cylinder with hammer seat 16, Upper end is placed through 2 center of guide rod fixed plate at 1 cantilever of fixed frame top plate, the positioning ring 9 can respectively with guide rod 6 and mention Bar 8 connects.
In presently preferred embodiment, upper driven wheel 3 is identical with lower 12 size of driven wheel, and center is located on same vertical line, Driving wheel 7 is located at the left side of above-mentioned vertical line, is distributed with upper driven wheel 3 and lower driven wheel 12 in isosceles triangle.And it is located at transmission It is rectangle with 8 top view of shadoof on 4, is slightly less than belt width with 4 stationary plane width of transmission belt;8 front view of shadoof is straight Angle triangle, bottom are bevel edge, and top is contacted with the spring catch bottom surface in positioning ring 9, and contact surface length is slightly less than shadoof 8 Length.The inside two sides of the positioning ring 9 are respectively equipped with spring catch and fixed thin slice, and the spring catch is located at close to transmission belt 4 Side, spring catch is a conical thin slice close to one end of guide rod 6, and the vertex of a cone is contacted with guide rod;Positioned at 9 other side of positioning ring Fixation thin slice be similarly a conical thin slice, the vertex of a cone is located in guide rod groove, bores the inner sidewall that positioning ring 9 is fixed at bottom, bullet Conical thin slice on spring pin is identical as fixed sheet thickness;The spring catch bottom can be contacted with 8 upper surface of shadoof, and be contacted Length is slightly less than the length of shadoof 8.The two sides of the guide rod 6 be respectively equipped with on positioning ring 9 conical thin slice and fixation The corresponding circular groove of thin slice, it is consistent with the depth of groove of fixed thin slice cooperation and much smaller than guide rod radius, with cone The groove of thin slice cooperation is the groove of a depth gradual change, and bottom depth is 0, and top depth is less than the diameter of guide rod 6, and two is recessed Slot start-stop position consistency.Two identical spring catch are equipped in the guide rod fixed plate 2, pin core is cylindrical body, and pin top one end is half Spherical shape, radius is identical as arc groove radius on guide rod 6 and contacts with guide rod 6, and the other end is located at cylinder in guide rod fixed plate 2 In body opening, two spring catch are located in same horizontal line, and guide rod fixed plate 2, guide rod 6 and hit the center of sample cylinder 11 and hang down same On line.
In use, as shadoof 8 lifts hammer 15, in positioning ring 9 on spring catch conical thin slice with groove The length that the increase of depth is fallen into guide rod 6 also increases, so that the spring catch other end and the contact length of shadoof 8 be made gradually to subtract Small, when positioning ring reaches groove top, hammer is close to free-falling, and as soil sample upper surface increases, groove top also rises therewith Height, so that the height for making hammer fall every time is consistent;It fixes sheet top in spring catch to be located in another rectangular recess, due to slot It is deep constant, it is ensured that guide rod 6, positioning ring 9, hammer 15 center be always positioned at during hitting sample on same vertical line.Two is round Groove is symmetrical along 6 center line of guide rod on guide rod 6, after often having hit one layer of soil sample, promotes guide rod 6, connects at the top of positioning ring 9 When nearly fixed frame 1 bottom surface of top plate, two spring catch domed tops in guide rod fixed plate 2 will be sprung into two circular grooves automatically, It is hit above sample cylinder to which hammer 15 to be fixed on together with hammer seat 16, after soil sample installs, at the top of pressing guide rod 6, in guide rod fixed plate 2 Two spring catch domed tops by guide rod 6 circular groove edge squeeze and retracts, that is, release fix, spring catch top set It is calculated as hemispherical, the contact area with guide rod 6 is reduced during hitting sample, has greatly cut down frictional force.
In another embodiment, the method for preparing sample using above-mentioned apparatus, includes the following steps:
1) according to the compactness and size of made sample, the quality of soil needed for calculating, and soil is equally divided into five parts;
2) guide rod 6 is promoted, hammer 15 and hammer seat 16 are fixed on by 1 cantilever bottom of fixed frame top plate by guide rod fixed plate 2, After sample cylinder 11 is hit in installation, bolt 10 is tightened;
3) first layer soil weight is weighed up, pours into and hits in sample cylinder 11, strokes grading face, catches 6 top of guide rod that hammer seat 16 is placed in Soil sample surface at the uniform velocity shakes rocking handle 5 counterclockwise and starts to hit sample, generally hits 25-27 times (it is consistent to ensure that every layer of soil sample hits number);
4) guide rod 6 is then promoted again, hammer 15 and hammer seat 16 are fixed on and hit the top of sample cylinder 11, with scraper by this layer of soil Hair is dug in sample upper surface, starts second layer soil sample compacting, repeats the step in step 3);
5) remaining three layers of production repeats step 3) with step 4), is sequentially completed the production of soil sample;
6) after the completion of the last layer hits reality, guide rod 6 is promoted, hammer 15 and hammer seat 16 are fixed on and hit 11 top of sample cylinder, Bolt 10 is unclamped, removes and hits sample cylinder 11, after removing casing, rebuild soil sample both ends with scraper, makes it and to hit 11 both ends of sample cylinder neat It is flat, then demould.
Three axis sample preparation device of compacting process of the invention and method eliminate the inclination of guide rod caused by human factor and each Layer hits the disadvantage that real work does not wait, and improves the uniformity of sample, while keeping sample making course relatively reliable convenient.

Claims (6)

1. a kind of three axis sample preparation device of compacting process, including be fixed on pedestal (17) fixed frame (13), be respectively arranged on it is solid Determine power supplying apparatus on frame (13) and pedestal (17) and hit sampling device, it is characterised in that: the power supplying apparatus includes It is triangular in shape to be distributed driving wheel (7), upper driven wheel (3) and the lower driven wheel (12) being fixed on fixed frame (13), driving wheel (7), upper driven wheel (3) and lower driven wheel (12) are linked together by transmission belt (4), are fixedly connected on the transmission belt (4) Shadoof (8), the driving wheel (7) are equipped with rocking handle (5), are at the top of fixed frame fixed frame top plate (1), and bottom surface is higher than upper driven Take turns the top of (3);
The sampling device that hits includes being fixed on pedestal (17) to hit sample cylinder (11), guide rod by bolt (10) by pull rod (14) (6) and hammer (15), the lower end of the guide rod (6) sequentially pass through positioning ring (9) and the hammer for being located at and hitting above sample cylinder (11) (15) it is connect with hammer seat (16), the upper end is placed through guide rod fixed plate (2) center at fixed frame top plate (1) cantilever, described Positioning ring (9) can be connected with guide rod (6) and shadoof (8) respectively.
2. three axis sample preparation device of compacting process according to claim 1, which is characterized in that the upper driven wheel (3) and Lower driven wheel (12) size is identical, and center is located on same vertical line, and driving wheel (7) is located at the left side of above-mentioned vertical line, on from Driving wheel (3) and lower driven wheel (12) are distributed in isosceles triangle.
3. three axis sample preparation device of compacting process according to claim 2, which is characterized in that the positioning ring (9) it is interior Portion two sides are respectively equipped with spring catch and fixed thin slice, and the spring catch is located at close to the side of transmission belt (4), and spring catch is close to lead One end of bar (6) is a conical thin slice, and the vertex of a cone is contacted with guide rod;Fixation thin slice positioned at positioning ring (9) other side is same For a conical thin slice, the vertex of a cone is located in guide rod groove, and the inner sidewall of positioning ring (9), the circular cone on spring catch are fixed in cone bottom Shape thin slice is identical as fixed sheet thickness;The spring catch bottom can be contacted with shadoof (8) upper surface, and contact length is slightly less than The length of shadoof (8).
4. three axis sample preparation device of compacting process according to claim 3, which is characterized in that the two sides of the guide rod (6) Be respectively equipped with the conical thin slice and the corresponding circular groove of fixed thin slice on positioning ring (9), match with fixed thin slice The depth of groove of conjunction is consistent and is much smaller than guide rod radius, and the groove with the cooperation of conical thin slice is the groove of a depth gradual change, Bottom depth is 0, and top depth is less than the diameter of guide rod (6), and two groove start-stop position consistencies.
5. three axis sample preparation device of compacting process according to claim 4, which is characterized in that the guide rod fixed plate (2) Two identical spring catch are inside equipped with, pin core is cylindrical body, and pin top one end is hemispherical, arc groove on radius and guide rod (6) Radius is identical and contacts with guide rod (6), and the other end is located in guide rod fixed plate (2) inner cylinder hole, and two spring catch are located at same On horizontal line, and guide rod fixed plate (2), guide rod (6) and the center of sample cylinder (11) is hit on same vertical line.
6. a kind of three axis preparation method of sample of compacting process a method as claimed in any one of claims 1 to 5, which is characterized in that the method packet Include following steps:
1) according to the compactness and size of made sample, the quality of soil needed for calculating, and soil is equally divided into five parts;
2) guide rod (6) are promoted, hammer (15) and hammer seat (16) is fixed on by fixed frame top plate (1) by guide rod fixed plate (2) and hanged Bolt (10) are tightened after sample cylinder (11) are hit in installation in arm bottom;
3) first layer soil weight is weighed up, pours into and hits in sample cylinder (11), stroke grading face, catches guide rod (6) top that hammer seat (16) is set In soil sample surface, rocking handle (5) are at the uniform velocity shaken counterclockwise and start to hit sample, generally hit 25-27 times (it is consistent to ensure that every layer of soil sample hits number);
4) guide rod (6) then are promoted again, hammer (15) and hammer seat (16) is fixed on and hit above sample cylinder (11), it should with scraper Hair is dug in layer soil sample upper surface, starts second layer soil sample compacting, repeats the step in step 3);
5) remaining three layers of production repeats step 3) with step 4), is sequentially completed the production of soil sample;
6) it after the completion of the last layer hits reality, is promoted guide rod (6), hammer (15) and hammer seat (16) is fixed on and is hit on sample cylinder (11) Side unclamps bolt (10), removes and hit sample cylinder (11), after removing casing, rebuild soil sample both ends with scraper, makes it and hits sample cylinder (11) both ends flush, and then demould.
CN201811179680.2A 2018-10-10 2018-10-10 A kind of three axis sample preparation device of compacting process and method Pending CN109085040A (en)

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Application Number Priority Date Filing Date Title
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CN112414811A (en) * 2020-11-04 2021-02-26 宁夏大学 Three-axis and cutting ring mold and molding method thereof
CN112665938A (en) * 2020-12-30 2021-04-16 南京交通职业技术学院 Geotechnical compaction test equipment

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112414811A (en) * 2020-11-04 2021-02-26 宁夏大学 Three-axis and cutting ring mold and molding method thereof
CN112665938A (en) * 2020-12-30 2021-04-16 南京交通职业技术学院 Geotechnical compaction test equipment

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