CN111912741A - Device for calibrating sand sample density by adopting sand rain method - Google Patents
Device for calibrating sand sample density by adopting sand rain method Download PDFInfo
- Publication number
- CN111912741A CN111912741A CN202010870446.5A CN202010870446A CN111912741A CN 111912741 A CN111912741 A CN 111912741A CN 202010870446 A CN202010870446 A CN 202010870446A CN 111912741 A CN111912741 A CN 111912741A
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- Prior art keywords
- sand
- storage box
- box
- calibrating
- density
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N9/00—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity
- G01N9/36—Analysing materials by measuring the density or specific gravity, e.g. determining quantity of moisture
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N9/00—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity
- G01N9/02—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity by measuring weight of a known volume
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N9/00—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity
- G01N9/02—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity by measuring weight of a known volume
- G01N2009/022—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity by measuring weight of a known volume of solids
- G01N2009/024—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity by measuring weight of a known volume of solids the volume being determined directly, e.g. by size of container
Abstract
The invention discloses a device for calibrating sand sample density by adopting a sand rain method, which comprises a sand storage box and a shakeout box arranged above the sand storage box, wherein a ball valve is connected at an outlet of the shakeout box, a hose is connected at an outlet of the ball valve, the shakeout box is connected with two guide rails which are vertically arranged through a slide block I and a fixing structure of the slide block I, the sand storage box is connected with the guide rails through a slide block II, the sand storage box is driven by a sliding spiral transmission mechanism to move up and down, the guide rails are fixed on a panel of a main body support, the main body support is fixed on a ground scale, the sliding spiral transmission mechanism is arranged on the main body support, and the top of the sand storage box is connected with a scraping plate. The invention adopts the fixed shakeout box and the movable sand storage box, and is matched with the scraper and the lower weighbridge, so that the calibration work of the relationship between the shakeout height and the sand density can be accurately and rapidly completed.
Description
Technical Field
The invention relates to the technical field of geotechnical tests, in particular to a device for calibrating sand sample density by adopting a sand rain method.
Background
In the geotechnical model test, the foundation preparation method and the uniformity thereof have direct influence on the test result. The sample preparation method of the sandy soil model is various, such as a vibration method, a compaction method, an insertion and tamping method, a sand rain method and the like. The sand rain method can be widely applied to geotechnical centrifugal model tests because sand samples with better uniformity can be prepared.
Before formal modeling, the relationship between the shakeout height and the density of the soil body after shakeout needs to be obtained. The former method is to hang a large funnel by a crane, connect a ball valve and a hose at the lower part of the funnel, place a sand storage box with regular shape on the ground, open the ball valve and then spread the sand evenly into the box until the whole box is full, then strike off the sand surface, finally take the sand storage box to a weighbridge and weigh to calculate the density. However, this approach has many problems: 1) due to the limitation of the control precision of the crane, the height between the outlet of the hose and the soil surface is difficult to keep constant in the sanding process; 2) the operation of scraping the sand surface has larger randomness; 3) the sand leakage condition can occur in the process of weighing by taking the floor scale. The above problems all result in inaccurate results of the final test.
Disclosure of Invention
The invention provides a device for calibrating sand sample density by adopting a sand rain method, which can accurately and quickly complete the calibration work of the relationship between the shakeout height and the sand density.
The technical scheme adopted by the invention for solving the technical problems in the prior art is as follows: the utility model provides an adopt sand rain method to mark device of sand sample density, is including storing up the sand box and setting up the shakeout box in its top the exit of shakeout box is connected with the ball valve be connected with the hose in the export of ball valve, the shakeout box passes through slider I and two guide rails of fixed knot structure and vertical setting are connected, store up the sand box pass through slider II with the guide rail is connected, it reciprocates by the drive of slip screw drive mechanism to store up the sand box, the guide rail is fixed on the panel of main part support, the main part support is fixed on the weighbridge, the slip screw drive mechanism install on the main part support store up sand box top and be connected with the scraper.
The ball valve is characterized in that a dial is mounted on a shell of the ball valve, the dial is sleeved on a valve core rotating handle of the ball valve, and an opening pointer matched with the dial is arranged on the valve core rotating handle of the ball valve.
And the panel of the main body bracket is provided with height scale graduation lines I.
The height scale mark I is arranged between the two guide rails and is provided with a soil surface scale which is flush with the 0 position of the height scale mark I, the soil surface scale adopts a semi-surrounding structure and surrounds the sand storage box, and two ends of the soil surface scale are fixedly connected with the main body bracket; the front side plate and the rear side plate of the sand storage box are made of transparent materials.
And a height scale graduation line II extending along the whole length of the front side plate of the sand storage box is arranged on the front side plate of the sand storage box.
And a height pointer is arranged at the top of the shakeout box.
And a chamfer is arranged on the outer side of the edge of the top of the sand storage box.
The bottom of the shakeout box adopts an inverted cone structure.
The sliding screw transmission mechanism is driven by a hand wheel.
The scraper is rotationally connected with the sand storage box through a pin shaft.
The invention has the advantages and positive effects that:
1) the position of the shakeout box is fixed, and a crane is not needed to be additionally used, so that the mechanical occupation cost can be reduced.
2) The height of the shakeout hose opening from the sand surface in the sand storage box can be realized by rotating the hand wheel, real-time dynamic adjustment can be realized, and the height of the shakeout hose opening and the soil surface is kept unchanged in the process of conveniently spreading sand.
3) After the sanding is finished, the operation of scraping the soil surface can be easily finished by rotating the soil scraping plate at the top of the sand storage box.
4) Because the ball valve is provided with the dial and the rotating handle is provided with the pointer, the consistency of the openings of the ball valve can be ensured by calibrating at different heights.
5) The measurement of weight can be accomplished through the weighbridge of bottom, need not whole transport.
In conclusion, the invention adopts the fixed sand shakeout box and the movable sand storage box, and is matched with the scraper and the lower weighbridge, so that the calibration work of the relationship between the shakeout height and the sand density can be accurately and rapidly completed, and the invention has the advantages of simple structure, convenient operation, time saving and work efficiency improvement.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of a sand storage box according to the present invention;
fig. 3 is a schematic structural diagram of the shakeout box of the present invention.
In the figure: 1. a ground scale; 2. a main body support; 3. a guide rail; 4. a soil surface scale; 5-1, a sliding block I; 5-2, a sliding block II; 6. a sand storage box; 6-1, a front side plate; 6-2, a rear side plate; 6-3, height scale graduation line II; 7. a shakeout box; 7-1, a dial; 7-2, an opening pointer; 7-3, a height pointer; 8. a scraper plate; 9. a nut; 10. a screw; 11. a supporting seat; 12. a hand wheel; 13. a ball valve; 14. a hose; 15. height scale graduation mark I.
Detailed Description
In order to further understand the contents, features and effects of the present invention, the following embodiments are illustrated and described in detail with reference to the accompanying drawings:
referring to fig. 1 to 3, the device for calibrating the density of a sand sample by using a sand rain method comprises a sand storage box 6 and a shakeout box 7 arranged above the sand storage box, wherein a ball valve 13 is connected to an outlet of the shakeout box 7, and a hose 14 is connected to an outlet of the ball valve 13.
The shakeout box 7 is connected with the two guide rails 3 which are vertically arranged through the sliding block I5-1 and the fixing structure thereof.
The sand storage box 6 is connected with the guide rail 3 through a sliding block II 5-2, and the sand storage box 6 is driven by the sliding spiral transmission mechanism to move up and down. The concrete structure is that the sand storage box 6 is fixedly connected with a nut 9, and a screw 10 is vertically arranged on a supporting seat 11.
The guide rail 3 is fixed on a panel of the main body support 2, and the main body support 2 is fixed on the ground scale 1.
The sliding screw drive mechanism is mounted on the main body support 2.
The top of the sand storage box 6 is connected with a scraper 8.
In the embodiment, a dial 7-1 is mounted on a shell of the ball valve 13, the dial 7-1 is sleeved on a valve core rotating handle of the ball valve 13, and an opening pointer 7-2 matched with the dial 7-1 is arranged on the valve core rotating handle of the ball valve 13, so that the consistency of the openings of the ball valve can be ensured for calibration at different heights. Be equipped with altitude scale mark I15 on the panel of main part support 2 to store up the position adjustment of sand box 6. The height scale graduation line I15 is arranged between the two guide rails 3, a soil surface scale 4 which is flush with the 0 position of the height scale graduation line I15 is arranged on the panel of the main body support 2, the soil surface scale 4 adopts a semi-surrounding structure and surrounds the sand storage box 6, and two ends of the soil surface scale are fixedly connected with the main body support 2; the front side plate 6-1 and the rear side plate 6-2 of the sand storage box 6 are made of transparent materials, and sand can uniformly fall to all places inside the sand storage box 6 on the same plane by means of the front side plate 6-1, the rear side plate 6-2 and the soil surface scale 4 of the sand storage box 6. Furthermore, a height scale graduation line II 6-3 extending along the whole length of the sand storage box 6 is arranged on the front side plate of the sand storage box. And the height scale mark II 6-3 is arranged on the front side plate 6-1 of the sand storage box, so that the observation of the flatness of a sand surface is facilitated, and the uniform sanding operation is facilitated.
And a height pointer 7-3 is arranged at the top of the shakeout box 7, so that the height value of the shakeout box 7 can be read accurately.
In this embodiment, the top edge of the sand storage box 6 is provided with a chamfer at the outer side, so that the redundant sand can be conveniently removed. The bottom of the shakeout box 7 is of an inverted cone structure, so that sand can fall smoothly. The sliding screw drive mechanism is driven by a hand wheel 12. The scraper 8 is rotationally connected with the sand storage box 6 through a pin shaft. The fixing structure comprises a locking screw, the sliding block I5-1 is fixed on the guide rail 2 through the locking screw and used for locking the height of the shakeout box, and the fixing structure is simple in structure and convenient to operate.
The working process of the invention is as follows:
1) before the test, the whole device is horizontally placed on the ground.
2) An air pump air gun is used for blowing sand grains possibly remained on the surface and the inside of the device.
3) The height of the shakeout box 7 is adjusted, and the height of the shakeout box is fixed by using a locking screw.
4) The height of the sand storage box 6 is adjusted by rotating the hand wheel 12, and the height is observed through the front side plate 6-1 of the sand storage box, so that the bottom surface inside the sand storage box is flush with the upper top surface of the soil surface scale 4.
5) And (5) turning on the power supply of the floor scale and pressing a zero clearing key.
6) The sand sample is poured into the shakeout box 7.
7) And rotating the rotating handle of the ball valve to the set scale to start to shake out.
8) The tester holds the hose to continuously adjust the position of the shakeout opening, and sand can uniformly fall to all places inside the sand storage box 6 on the same plane by means of the height scale graduation lines II 6-3 on the front side plate 6-1 of the sand storage box.
9) When the sand is spread, the height of the sand surface is observed and the hand wheel is adjusted, so that the sand surface is always kept flush with the soil surface scale until the sand is spread to exceed the top of the sand storage box.
10) And discharging and emptying all residual sand samples in the shakeout box 7.
11) The sand scraping plate 8 is rotated to scrape the sand surface in the sand storage box 6.
12) And blowing off residual sand grains on the device except the sand storage box by using an air pump air gun.
13) And observing the numerical value of the weighbridge at the moment, namely the weight of the sand sample in the sand storage box.
14) The density is calculated by the weight and the volume of the sand storage box 6, and the relation of the height and the density is obtained.
15) And repeating the steps 2) to 14) to finish the calibration of the corresponding relation between different heights and the sand sample density.
Although the preferred embodiments of the present invention have been described above with reference to the accompanying drawings, the present invention is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and those skilled in the art can make many modifications without departing from the spirit and scope of the present invention as defined in the appended claims.
Claims (10)
1. A device for calibrating sand sample density by adopting a sand rain method comprises a sand storage box and a shakeout box arranged above the sand storage box, wherein the outlet of the shakeout box is connected with a ball valve, the outlet of the ball valve is connected with a hose, and the device is characterized in that,
the shakeout box is connected with two guide rails which are vertically arranged through a slide block I and a fixed structure thereof,
the sand storage box is connected with the guide rail through a sliding block II, the sand storage box is driven by a sliding spiral transmission mechanism to move up and down,
the guide rail is fixed on a panel of the main body bracket, the main body bracket is fixed on the floor scale,
the sliding screw transmission mechanism is arranged on the main body bracket,
the top of the sand storage box is connected with a scraper.
2. The device for calibrating the density of the sand sample by the sand rain method according to claim 1, wherein a dial is arranged on a shell of the ball valve, the dial is sleeved on a valve core rotating handle of the ball valve, and an opening pointer matched with the dial is arranged on the valve core rotating handle of the ball valve.
3. The device for calibrating the density of the sand sample by the sand rain method according to claim 1, wherein a height scale mark I is arranged on a panel of the main body bracket.
4. The device for calibrating the density of the sand sample by the sand rain method according to claim 3,
the height scale graduation line I is arranged between the two guide rails, a soil surface scale which is flush with the height scale graduation line I0 is arranged on the panel of the main body bracket,
the soil surface scale is of a semi-surrounding structure, surrounds the sand storage box and is fixedly connected with the main body bracket at two ends;
the front side plate and the rear side plate of the sand storage box are made of transparent materials.
5. The device for calibrating the density of the sand sample by the sand rain method according to claim 4, wherein a height scale graduation line II extending along the whole length of the sand storage box is arranged on the front side plate of the sand storage box.
6. The device for calibrating the density of the sand sample by the sand rain method according to claim 1, wherein a height pointer is arranged at the top of the shakeout box.
7. The device for calibrating the density of the sand sample by the sand rain method according to claim 1, wherein a chamfer is arranged on the outer side of the top edge of the sand storage box.
8. The device for calibrating the density of the sand sample by the sand rain method according to claim 1, wherein the bottom of the sand shakeout box is of an inverted cone structure.
9. The device for calibrating the density of the sand sample by the sand rain method according to claim 1, wherein the sliding screw transmission mechanism is driven by a hand wheel.
10. The device for calibrating the density of the sand sample by the sand rain method according to claim 1, wherein the scraper is rotatably connected with the sand storage box through a pin shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010870446.5A CN111912741A (en) | 2020-08-26 | 2020-08-26 | Device for calibrating sand sample density by adopting sand rain method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010870446.5A CN111912741A (en) | 2020-08-26 | 2020-08-26 | Device for calibrating sand sample density by adopting sand rain method |
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| CN111912741A true CN111912741A (en) | 2020-11-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010870446.5A Pending CN111912741A (en) | 2020-08-26 | 2020-08-26 | Device for calibrating sand sample density by adopting sand rain method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114018757A (en) * | 2021-11-09 | 2022-02-08 | 黑龙江普莱德新材料科技有限公司 | Automatic device and method for accurately measuring tap density |
-
2020
- 2020-08-26 CN CN202010870446.5A patent/CN111912741A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114018757A (en) * | 2021-11-09 | 2022-02-08 | 黑龙江普莱德新材料科技有限公司 | Automatic device and method for accurately measuring tap density |
| CN114018757B (en) * | 2021-11-09 | 2023-10-13 | 中建材黑龙江石墨新材料有限公司 | Automatic device and method for accurately measuring tap density |
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