CN106802251A - A kind of controllable sand rain method sand shake-out device of automatic stop-off flow - Google Patents
A kind of controllable sand rain method sand shake-out device of automatic stop-off flow Download PDFInfo
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- CN106802251A CN106802251A CN201510833093.0A CN201510833093A CN106802251A CN 106802251 A CN106802251 A CN 106802251A CN 201510833093 A CN201510833093 A CN 201510833093A CN 106802251 A CN106802251 A CN 106802251A
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Abstract
The invention belongs to Geotechnical Engineering field, it is related to the sand rain method sand shake-out device that a kind of automatic stop-off flow is controllable.The controllable sand rain method sand shake-out device of the automatic stop-off flow includes portal frame, lifting and translating device, sand hopper, screen cloth, control panel, shutter and PLC.It is divided into upper and lower two-layer inside sand hopper, and screen cloth is set in upper and lower layer bottom；Control panel is adsorbed on sand hopper lower level floor screen cloth, changes control plate shape, size and location control sand flow；Shutter plug flat controls unlatching and the closure of sand feed hopper bottom in the draw-in groove of sand feed hopper bottom；PLC is connected with lifting with translating device, and control lifting is lifted by crane and horizontal movement with translating device.The present invention, simple structure, easy to operate, cost of investment are low, one-time pad amount big, and automatically control two dimensional motion, are automatically replenished sand, effectively save manpower, and formula sample uniformity and repeatability are preferably, can meet most of test requirements document.
Description
Technical field
The present invention relates to a kind of Geotechnical Engineering indoor model test equipment, belong to civil engineering groundwork foundation engineering model test field, be specifically related in a kind of geotechnical model test to prepare the controllable sand rain method sand shake-out device of a kind of automatic stop-off flow of sand sample.
Background technology
Geotechnical Engineering is an important branch of civil engineering, and main study subject is Rock And Soil, and research object is uncertain strong, triggers loss very big once there is accident., it is necessary to be aided with model test to complete the research for Geotechnical Engineering when the characteristics of studying Geotechnical Engineering, so prepared by sample is vital sport technique segment in geotechnical model test, the quality for filling sample directly affects the success or failure of model test.At present, preparing sand sample common method has vibratory drilling method, compacting process, plugs and pounds method and sand rain method.Wherein sand rain method can preferably simulate the natural sand soil layer of wind load or current deposition, and its layering is closer to natural layer of sand, and layer of sand homogeneity is good, is easy to be applied in full-scale model test, the method extensive use in the various soil tests of sand.But, the sand amount in height, knockout flow, the device of knockout of knockout is all the key factor for influenceing sand sample.Conventional sand rain method sand shake-out device is all that testing crew is controlled manually, translational speed, lifting position etc. are influenceed larger by artificial operation, although Wang Zhongtao etc. discloses a kind of automatic sand sprayer of sand rain method, but its sand shake-out device complex structure, it is more expensive to manufacture, it is not suitable for the preparation of large-scale model sand sample, and is easily damaged in intensity model stucco filling operation higher.
The content of the invention
For existing defect, the invention provides a kind of controllable sand rain method sand shake-out device of automatic stop-off flow, the device passes through programmable logic controller（PLC）Full-automatic two dimensional motion is capable of achieving, sand amount can compensate automatically, flow can be adjusted, and it is simple structure, easy to operate, low manufacture cost, applied widely.And knockout factor can be controlled, the sand sample of different relative densities can be prepared.
The technical scheme is that：A kind of controllable sand rain method sand shake-out device of automatic stop-off flow, including：Sand hopper, screen cloth, control panel, shutter, portal frame, lifting and translating device, PLC.The sand hopper is divided into upper and lower two-layer, is inside provided with two sets of screen clothes；The control panel includes magnet and poly (methyl methacrylate) plate；The lifting includes vertically moving cucurbit, moves horizontally sport car, a suspender belt, hanger and drop hanger with translating device.
Further, the sand hopper can be circular or square, be divided into upper and lower two-layer, and set upper and lower two sets of screen clothes, and a set of screen cloth is arranged on hopper and is referred to as upper screen at the middle and upper levels, and another set of screen cloth is arranged on lower floor, away from feed hopper bottom 15cm, referred to as lower screen.Preferably, sand has been loaded in the hopper, sand is exported from the hopper lower floor and flowed out by the screen cloth, the sand in the hopper upper strata can automatically compensate the sand amount of the hopper lower floor outlet outflow.
Further, the bottom of the sand hopper is provided with draw-in groove, and the shutter can be with plug flat in the draw-in groove.
Further, the screen cloth is fixed on the hard iron ring of annular, and the iron ring surrounding carries screw hole, is connected by the upper and lower two-layer bottom of the screw hole and the hopper；
Further, the lower screen sets Double-layer screen, and spacing is 1cm, and the upper screen is individual layer screen cloth
Further, the control panel shape, big I are arbitrarily formulated according to experimental design, and the control panel bottom carries magnetite, by the magnet adsorption in lower screen.The flow and speed of the sand can be controlled by the size and location of the panel.
Further, the shutter is lucite material, and its shape can be able to be square or circle according to the design customized of sand hopper.
Further, the portal frame bottom carries wheel, slidably and locked
Further, the lifting and translating device include vertically moving cucurbit, move horizontally sport car, play suspender belt, play hanger and drop hanger, the sport car that moves horizontally is fixed on the portal frame, it is described vertically move cucurbit be arranged on it is described move horizontally sport car lower section, it is described vertically move cucurbit and stayed by the suspension hook, lifting and play a hanger be connected with the sand hopper.
Further, the lifting and translating device are connected by cable with the PLC control panels, the lifting translating device is operated by the PLC, the PLC can be manually entered control parameter, control the lifting speed and point-to-point speed of the lifting and translating device.
Compared with existing invention, the present invention has following beneficial effect：
（1）The present invention, by controlling the height and translational speed of sand hopper, can prepare the sand sample of different relative densities by sand hopper automatic compensation function, the quality of accurate control sand hopper lower region.
（3）Control plate shape of the invention, size and location can arbitrarily be formulated according to experimental design, increase the scope of application of sand shake-out device, not only go for the sand sample of tiling, prepared by the sand sample that can be also used for there is barrier in model cylinder, such as preparation of the sand foundation with Model Pile.
（2）The present invention can realize being automatically moved in two dimensional surface, reduce manual intervention, can prepare more uniform sand sample.
（3）Simple structure of the present invention, easy to operate, disposable loadings are big, and low cost of manufacture.
Brief description of the drawings
Figure
1
Automatic stop-off rain method shakeout structural representation
Figure
2
Sand hopper construction schematic diagram
Figure
3
Control plate structure schematic diagram
In figure,
1
- portal frame,
2
- lifting and and translating device,
3
- sand hopper,
4
- sand hopper upper strata,
5
- sand hopper upper screen,
6
- sand hopper lower floor,
7
- sand hopper lower screen,
8
- lower sand export,
9
- draw-in groove,
10
- wheel,
11
—
PLC
Controller,
12
- model casing,
13
- control panel,
14
- shutter,
15
- magnet ring,
16
- poly (methyl methacrylate) plate.
Specific embodiment
Below in conjunction with technical scheme（And accompanying drawing）Specific embodiment of the invention is described in detail.Following examples will be helpful to those skilled in the art and further appreciate that invention, but the invention is not limited in any way.
As shown in Figure 1, 2, 3, this example provides a kind of automatic stop-off flow controllable sand rain method sand shake-out device, including：Portal frame 1, lifting and translating device 2, sand hopper 3, control panel 13, wherein：3 points of the sand hopper is upper, lower two-layer, respectively sand hopper upper strata 4 and sand hopper lower floor 6, the bottom of sand hopper upper strata 4 sets upper screen 5, the bottom of sand hopper lower floor 6 sets lower screen 7, sand needed for loading Geotechnical Engineering model test in the upper screen 4 and lower screen 7, the sand feed hopper bottom sets under shed 8, the under shed top is provided with draw-in groove 9, the plug flat of the shutter 14 is in the draw-in groove 9, the top of the sand hopper 3 is connected with the lifting with translating device 2, the lifting translating device is controlled by the PLC 11, the lifting is fixed on the portal frame 1 with translating device.
Sample preparation procedure is as follows：
First according to test requirements document, the size and location of control panel 13 is adjusted with reference to calibration result, control panel 13 is adsorbed in the lower screen 7 of sand hopper 3, then by the plug flat of shutter 14 in the draw-in groove 9 of feed hopper bottom, model test sand is loaded in sand hopper 3, with lifting with translating device 2 by sand hopper 3 sling and adjust sand hopper to model casing 12 fall away from for design fall away from then stent molding box 12 position, flatten；Next the switch of PLC 11 is opened, the speed and stroke of the horizontal movement of sand hopper and vertical movement is manually entered on the panel of PLC 11；The shutter 14 in sand feed hopper bottom draw-in groove 9 is finally taken out, the knockout switch on the panel of PLC 11 is opened, starts knockout.During the sand of lower floor drops into model cylinder 12 through lower screen 7 and sand feed hopper bottom in sand hopper 3, and the sand at the middle and upper levels of sand hopper 3 can flow into sand hopper lower floor, the sand amount of supplement sand hopper lower floor by upper screen 5 immediately；And under the control of PLC 11, hopper 3 can realize two-dimensional motion, specific motor pattern is：For prepare model it is smaller when, the automatic speed risen along z week of sand hopper 3 can be set according to setting sand flow amount, it is ensured that the upper surface of institute's sanding soil sample all the time with the holding level altitude of sand hopper 3；For prepare model it is larger when, sand hopper 3 is moved in x-y plane along the span direction of portal frame 1, and the other end is moved to from one end, and then sand hopper 3 is automatic rises Δ h along z-axis（Δ h is to circulate the thickness that the sand sample of a cycle demarcation is scattered）, making to fall away from keeping constant, so circulation stops knockout button in PLC 11 after model casing sand reaches appointed thickness.In process of the test, change the falling away from, the parameter such as the size of control panel 13, shape and position, the translational speed of sand hopper 3 to the bottom of model casing 12 of sand hopper 3, reach the purpose for preparing different relative density sand samples.
The controllable sand rain method sand shake-out device of a kind of automatic stop-off flow that the present embodiment is provided, its simple structure, sand hopper is divided into upper and lower two-layer and realizes automatic stop-off function of the upper strata to lower floor, ensure that knockout container sand amount it is constant, and in sand feed hopper bottom screen cloth, control panel is set, the flow and flow velocity of knockout can be adjusted, except this, lifting and translating device are directly controlled by PLC, reduce human intervention, on the one hand reduce the labour intensity of testing crew, on the other hand improve the homogeneity of sand sample.
Claims (8)
1. the controllable sand rain method sand shake-out device of a kind of automatic stop-off flow, including：Sand hopper, screen cloth, control panel, shutter, portal frame, lifting and translating device, PLC.
2. the controllable sand rain method sand shake-out device of a kind of automatic stop-off flow according to claim 1, it is characterised in that：The sand hopper can be circular or square, be divided into upper and lower two-layer, and inside sets upper and lower two sets of screen clothes, and a set of screen cloth is arranged on sand hopper upper strata referred to as upper screen, and another set of screen cloth is arranged on lower floor, away from feed hopper bottom 15cm, referred to as lower screen.
3. the controllable sand rain method sand shake-out device of a kind of automatic stop-off flow according to claim 1, it is characterised in that：The bottom of the sand hopper is provided with draw-in groove, and the shutter can be with plug flat in the draw-in groove.
4. the controllable sand rain method sand shake-out device of a kind of automatic stop-off flow according to claim 1, it is characterised in that：The screen cloth is fixed on the hard iron ring of annular, and the iron ring surrounding carries screw hole, is connected by the upper and lower two-layer bottom of the screw hole and the hopper.
5. the controllable sand rain method sand shake-out device of a kind of automatic stop-off flow according to claim 1, it is characterised in that：The lower screen sets Double-layer screen, and spacing is 1cm, and the upper screen is individual layer screen cloth.
6. the controllable sand rain method sand shake-out device of a kind of automatic stop-off flow according to claim 1, it is characterised in that：The control panel shape, big I are arbitrarily formulated according to experimental design, and the control panel bottom carries magnetite, by the magnet adsorption in lower screen.
7. the controllable sand rain method sand shake-out device of a kind of automatic stop-off flow according to claim 1, it is characterised in that：The shutter is lucite material, and its shape can be able to be square or circle according to the design customized of sand hopper.
8. the controllable sand rain method sand shake-out device of a kind of automatic stop-off flow according to claim 1, it is characterised in that：The PLC is connected with the lifting by cable with translating device, and the lifting translating device is operated by the PLC.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510833093.0A CN106802251A (en) | 2015-11-26 | 2015-11-26 | A kind of controllable sand rain method sand shake-out device of automatic stop-off flow |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510833093.0A CN106802251A (en) | 2015-11-26 | 2015-11-26 | A kind of controllable sand rain method sand shake-out device of automatic stop-off flow |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107782593A (en) * | 2017-09-18 | 2018-03-09 | 东南大学 | Packaged type sand leakage device and prepare the method for making sample of sand using it |
| CN109304429A (en) * | 2017-07-26 | 2019-02-05 | 天津市信雅机械股份有限公司 | A kind of board-like Mechanical processing of casting leaching sand device sandstone cutting agency |
| CN112517394A (en) * | 2020-11-19 | 2021-03-19 | 中国地质大学（武汉） | Sleeve type multistage sand rain device and sand sample preparation method |
-
2015
- 2015-11-26 CN CN201510833093.0A patent/CN106802251A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109304429A (en) * | 2017-07-26 | 2019-02-05 | 天津市信雅机械股份有限公司 | A kind of board-like Mechanical processing of casting leaching sand device sandstone cutting agency |
| CN107782593A (en) * | 2017-09-18 | 2018-03-09 | 东南大学 | Packaged type sand leakage device and prepare the method for making sample of sand using it |
| CN107782593B (en) * | 2017-09-18 | 2020-02-18 | 东南大学 | Movable sand leaking device and sample preparation method for preparing sandy soil by using same |
| CN112517394A (en) * | 2020-11-19 | 2021-03-19 | 中国地质大学（武汉） | Sleeve type multistage sand rain device and sand sample preparation method |
| CN112517394B (en) * | 2020-11-19 | 2022-04-01 | 中国地质大学（武汉） | Sleeve type multistage sand rain device and sand sample preparation method |
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Application publication date: 20170606 |