CN104233998A - High-flow water circulation system for giant geotechnical centrifuge - Google Patents
High-flow water circulation system for giant geotechnical centrifuge Download PDFInfo
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- CN104233998A CN104233998A CN201410513758.5A CN201410513758A CN104233998A CN 104233998 A CN104233998 A CN 104233998A CN 201410513758 A CN201410513758 A CN 201410513758A CN 104233998 A CN104233998 A CN 104233998A
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Abstract
The invention discloses a high-flow water circulation system for a giant geotechnical centrifuge. The high-flow water circulation system comprises a centrifuge chamber, a main shaft, a rotating arm, a model box, an upper instrument cabin, an annular water tank, a water supplying system, a third water inlet pipe, a fourth water inlet pipe and a water return system, wherein the water supplying system comprises a first water inlet pipe, a second water inlet pipe and a water pump, the water return system comprises a filtration tank and a water collection pool, and a filtration device is arranged in the filtration tank. According to the high-flow water circulation system for the giant geotechnical centrifuge, disclosed by the invention, through the water supplying system, the water return system and the annular water tank as well as corresponding devices thereof, continued high-flow water supply can be provided for giant geotechnical centrifuge tests, and the damage to equipment due to the fact that test water is randomly splashed into the centrifuge chamber can be prevented; meanwhile, the test water containing solid particles, such as silt, can be recovered; tested muddy water can be reused after filtration, so that the test cost is reduced.
Description
Technical field
The present invention relates to centrifuge water circulation system, particularly relate to a kind of huge geotechnical centrifuge large discharge water circulation system.
Background technology
Huge geotechnical centrifuge refers generally to the ultra-large type geotechnical centrifuge of capacity more than 1000gt (g is acceleration of gravity, and t is unit of weight, ton).It utilizes the centrifuge of High Rotation Speed to produce the super gravity field of n times of acceleration of gravity, the selfweight stress loss that compensation model causes because of reduced scale, produces n scale effect, n doubly at model dimension
2effect, n during contracting doubly
3strengthening energy effect doubly.
The development of huge geotechnical centrifuge, not only can to solve under high ground stress in extreme environment, hypergravity, large spatial and temporal scales and hyperosmosis that pollutant in the multiphase coupled effect of solid-liquid-gas in Rock And Soil, large planar dimension Rock And Soil is migrated for a long time, the great Science and Technology problem such as motion of matter rule under super gravity field, but also will reservoir dam safety, river or ocean current be become to Scientific Research Platforms such as the multi-scenarios method effects of earthen structure wherein.
Reservoir dam to be carried out to burst destruction centrifuge modelling tests on huge geotechnical centrifuge, or carry out the multi-scenarios method centrifugal test research of fluid and earthen structure, must in huge geotechnical centrifuge high-speed rotation, for hanging basket internal mold molding box provides lasting large discharge to supply water.Conventional art realizes above-mentioned functions and mainly contains following three kinds of schemes:
(1) large water tank is set on centrifuge pivoted arm, and is connected with hanging basket internal mold molding box by water pump, form the water circulation system closed;
(2) by swivel joint, ground experiment water is transported to hanging basket internal mold molding box, and water after test is transported to ground;
(3) patent of invention is " in system for controlling high-flow water flow of centrifugal machine (patent No.: ZL201110434073.8); utilize large volume water tank that the outer height of Centrifuge Room is put to the annular water tank way of supplying water on centrifuge axis of rotation, achieve high-flow water flow of centrifugal machine supply in finite time.
No matter carry out reservoir dam to burst destruction centrifuge modelling tests, still the multi-scenarios method centrifugal test research of fluid and earthen structure is carried out, the model casing be all required to be on the centrifuge pivoted arm of High Rotation Speed provides lasting large discharge to supply water, but the lasting large discharge that above-mentioned three kinds of modes all can not realize centrifugal test process supplies water and the rear recovery of being with the test water of silt of test, there is following shortcoming respectively simultaneously:
For scheme (1): large water tank increases quality and the out-of-balance force of centrifuge pivoted arm, in order to realize the balance at pivoted arm two ends, need increase corresponding static balance balancing weight at the other end installing water tank, this will significantly increase the driving power of centrifuge.In addition, under super gravity field, water pump is not only difficult to steady operation, and is difficult to the water blowback water tank again of model casing eliminating.
For scheme (2): swivel joint can not realize supply and the recovery of large discharge water, the more difficult recovery realizing the water of band silt.
For scheme (3): " system for controlling high-flow water flow of centrifugal machine " is in theory by arranging the storage tank of infinitely great volume to realize the supply of lasting large discharge water, but spray into Centrifuge Room in a large number from the water of the band silt of model casing discharge, though muddy water is pumped by pump, but under centrifugal action, the muddy water being ejected into unit room wall is through the repeatedly beating of the pivoted arm of refraction and High Rotation Speed, whole centrifuge machine hall will be splashed to, not only to make dirty equipment, but also the damage of the automatically controlled components and parts on centrifuge pivoted arm and the corrosion of centrifuge host computer system may be caused, thus affect the application life of equipment.
Summary of the invention
The object of the invention is to solve the problem and a kind of huge geotechnical centrifuge large discharge water circulation system is provided.
The present invention is achieved through the following technical solutions above-mentioned purpose:
A kind of huge geotechnical centrifuge large discharge water circulation system, comprise unit room, main shaft, pivoted arm, model casing and upper instrument room, described pivoted arm is fixedly mounted on described main shaft by the installing hole of its center of rotation, the lower end of described main shaft is fixedly connected with the inner bottom surface of described unit room by transmission supporting, the upper end of described main shaft is fixedly connected with by the inner top surface of upper supporting with described unit room, described upper instrument room is arranged on the upper end face of described unit room, and be connected by the upper surface of power transmission shaft with described main shaft, described model casing is arranged in the hanging basket of described pivoted arm first end, second end of described pivoted arm is provided with balancing weight, described water circulation system also comprises annular water tank, water system, 3rd water inlet pipe and the 4th water inlet pipe, the water side of described water system is arranged in described annular water tank, described main shaft is hollow shaft, described annular water tank to be fixedly connected with the upper end of described main shaft by screw and to be positioned at the top of described upper supporting, described annular water tank bottom is provided with delivery port, in the cavity that described 3rd water inlet pipe is arranged on described main shaft and the water inlet end of described 3rd water inlet pipe be connected with the delivery port of described annular water tank, the water side of described 3rd water inlet pipe is connected with the water inlet end of described 4th water inlet pipe through the through hole of described main shaft sidewall, described 4th water inlet pipe is arranged on described pivoted arm, water side and the described model casing of described 4th water inlet pipe are connected, the inwall of described unit room is provided with garland in the position with described pivoted arm level, the bottom of described garland is provided with delivery port.
Huge geotechnical centrifuge is the asymmetric arm configuration of single hanging basket, and pivoted arm is followed and rotated to produce centrifugal acceleration with main shaft, thus provides super gravity field for centrifugal test.
Particularly, described water system comprises the first water inlet pipe, the second water inlet pipe and water pump, the water side of described first water inlet pipe is connected with the water inlet end of described water pump, the water side of described water pump is connected with the water inlet end of described second water inlet pipe, and the water side of described second water inlet pipe is arranged in described annular water tank.
When centrifuge run to certain acceleration need to model casing water filling time, by controlling the water pump of water system, the water of external water source is pumped by test requirements document flow velocity and flow by the first water inlet pipe, and injects annular water tank by the second water inlet pipe.
Further, described water circulation system also comprises return water system, described return water system comprises filtering ponds and collecting-tank, filter is provided with in described filtering ponds, the water inlet of described filtering ponds is connected by the delivery port of outlet pipe and described garland, the delivery port of described filtering ponds and the water inlet of described collecting-tank are connected, and the water inlet end of described first water inlet pipe is arranged in described collecting-tank.
The muddy water spraying into garland flows into filtering ponds through delivery port and outlet pipe, and the filter in filtering ponds carries out sedimentation and filtration process to the water flowing into band silt, and the water after process flows into collecting-tank, is then recycled by water system.
Preferably, described filtering ponds are also divided into soil chamber and clear water chamber by the horizontal or vertical setting of described filter, described soil chamber and described garland are connected, described clear water chamber and described collecting-tank are connected, described filter comprises two-layer screen pack and quartz sand, and two-layer described screen pack be arranged in parallel and described quartz sand is arranged on its interlayer inside.
Further, described water circulation system also comprises multiple dash grid and scupper hose, one end of described scupper hose is fixedly connected with the delivery port of described model casing, and multiple described dash grid is evenly arranged on described garland inside and is fixedly connected with the bottom surface of described garland.
Preferably, the angle of the plane at the tangent line place of the plane at described dash grid place and the tie point of described dash grid and described garland bottom surface is acute angle, and the incline direction of described dash grid is contrary with the direction of rotation of described pivoted arm.
Scupper hose can shorten the delivery port of model casing and the distance of garland, and the muddy water of discharging from model casing so directly can spray into rhone near grid, and under the effect of grid, the muddy water sprayed into can be avoided splashing and all enter the delivery port of rhone.
Particularly, described upper supporting comprises junction plate, fixed ring piece and connecting ring, the upper surface of described fixed ring piece is fixedly connected with the inner top surface of described unit room, the soffit of described fixed ring piece is fixedly connected with described connecting ring by multiple described junction plate, and described connecting ring is rotatably connected by the upper end of rolling bearing and described main shaft.
Particularly, described power transmission shaft comprises major axis, arc-like sheet and connection ring plate, the soffit of described connection ring plate is fixedly connected with by the upper surface of screw with described main shaft, the upper surface of described connection ring plate is fixedly connected with the lower end of described major axis by multiple described arc-like sheet, and the upper end of described major axis is connected with described upper instrument room.
In order to prevent the water injected from dishing out from tank port under centrifugal action, described annular water tank is the calabash shape water tank removing end face.
Main shaft is hollow shaft, its hypomere is by being fixed on its radial displacement of transmission supporting constraint of unit room ground, epimere retrains radial displacement by upper the commitments being fixed on unit room top ground, a upper commitments are connected by rolling bearing with main shaft, like this under the prerequisite not affecting main shaft rotation, achieve lower support on main shaft, thus increase the ability of base bearing idling arm out-of-balance force; Power transmission shaft is fixed by screws in main shaft upper surface, and in centrifuge operation process, instrument room in drive rotates with main shaft by it, thus can monitor pivoted arm; Annular water tank is fixed by screws in main shaft upper end and rotates with main shaft, and due to the special structure form of annular water tank, in centrifuge running, it can not interfere with the structure such as static upper supporting, also not affect the installation of power transmission shaft simultaneously.
Beneficial effect of the present invention is:
The present invention's huge geotechnical centrifuge large discharge water circulation system is by water system, return water system and annular water tank and corresponding intrument thereof, can be huge geotechnical centrifuge test provides lasting large discharge to supply water, and the damage that can prevent the random splash of test water from entering Centrifuge Room and equipment is caused; Test water containing solid particles such as silt particles can be reclaimed simultaneously; Muddy water after test processes after filtration, can reuse, thus has saved experimentation cost.
Accompanying drawing explanation
Fig. 1 is the overall sectional view of huge geotechnical centrifuge large discharge water circulation system of the present invention;
Fig. 2 is the close-up schematic view of Fig. 1;
Fig. 3 is the scheme of installation of dash grid of the present invention;
Fig. 4 is the structural representation of upper supporting of the present invention;
Fig. 5 is the structural representation of power transmission shaft of the present invention;
Fig. 6 be annular water tank of the present invention partly cut open schematic diagram;
Fig. 7 is the structural representation of annular water tank of the present invention.
1-unit room; 2-the first water inlet pipe; 3-transmission is supported; 4-water pump; 5-the second water inlet pipe; 6-main shaft; 7-upper instrument room; 8-annular water tank; 9-the three water inlet pipe; 10-upper supporting; 11-pivoted arm; 12-the four water inlet pipe; 13-model casing; 14-garland; 15-outlet pipe; 16-screen pack; 17-filtering ponds; 18-quartz sand; 19-collecting-tank; 20-power transmission shaft; 21-bearing; 22-scupper hose; 23-dash grid.
Detailed description of the invention
Below in conjunction with accompanying drawing, the invention will be further described:
As Fig. 1, Fig. 2, shown in Fig. 6 and Fig. 7, the present invention's huge geotechnical centrifuge large discharge water circulation system, comprise unit room 1, main shaft 6, pivoted arm 11, model casing 13, upper instrument room 7, annular water tank 8, water system, 3rd water inlet pipe 9, 4th water inlet pipe 12 and return water system, annular water tank 8 is the calabash shape water tank removing end face, pivoted arm 11 is fixed on described main shaft 6 by the installing hole of its center of rotation, the lower end of main shaft 6 is fixedly connected with the inner bottom surface of unit room 1 by transmission supporting 3, the upper end of main shaft 6 is fixedly connected with the inner top surface of unit room 1 by upper supporting 10, upper instrument room 7 is arranged on the upper end face of unit room 1, and be connected with the upper surface of main shaft 6 by power transmission shaft 20, model casing 13 is arranged in the hanging basket of pivoted arm 11 first end, second end of pivoted arm 11 is provided with balancing weight, the water side of water system is arranged in annular water tank 8, main shaft 6 is hollow shaft, annular water tank 8 to be fixedly connected with the upper end of main shaft 6 by screw and to be positioned at the top of upper supporting 10, annular water tank 8 bottom is provided with delivery port, in the cavity that 3rd water inlet pipe 9 is arranged on main shaft 6 and the water inlet end of the 3rd water inlet pipe 9 be connected with the delivery port of annular water tank 8, the water side of the 3rd water inlet pipe 9 is connected with the water inlet end of the 4th water inlet pipe 12 through the through hole of main shaft 6 sidewall, 4th water inlet pipe 12 is arranged on pivoted arm 11, water side and the model casing 13 of the 4th water inlet pipe 12 are connected, the inwall of unit room 1 is provided with garland 14 in the position with pivoted arm 11 level, the bottom of garland 14 is provided with delivery port, water system comprises the first water inlet pipe 2, second water inlet pipe 5 and water pump 4, the water side of the first water inlet pipe 2 is connected with the water inlet end of water pump 4, the water side of water pump 4 is connected with the water inlet end of the second water inlet pipe 5, the water side of the second water inlet pipe 5 is arranged in annular water tank 8, return water system comprises filtering ponds 17 and collecting-tank 19, filter is provided with in filtering ponds 17, the water inlet of filtering ponds 17 is connected by the delivery port of outlet pipe 15 with garland 14, the delivery port of filtering ponds 17 and the water inlet of collecting-tank 19 are connected, the water inlet end of the first water inlet pipe 2 is arranged in collecting-tank 19.
Filtering ponds 17 are also divided into soil chamber and clear water chamber by the horizontal or vertical setting of filter, soil chamber and garland 14 are connected, clear water chamber and collecting-tank 19 are connected, filter comprises two-layer screen pack 16 and quartz sand 18, and two-layer screen pack 16 be arranged in parallel and quartz sand 18 is arranged on its interlayer inside.
As shown in Figure 3, water circulation system also comprises multiple dash grid 23 and scupper hose 22, one end of scupper hose 22 is fixedly connected with the delivery port of model casing 13, multiple dash grid 23 is evenly arranged on garland 14 inside and is fixedly connected with the bottom surface of garland 14, the angle of the plane at the tangent line place of the tie point of the plane at dash grid 23 place and dash grid 23 and garland 14 bottom surface is acute angle, and the incline direction of dash grid 23 is contrary with the direction of rotation of pivoted arm 11.
As shown in Figure 4, upper supporting 10 comprises junction plate, fixed ring piece and connecting ring, the upper surface of fixed ring piece is fixedly connected with the inner top surface of unit room 1, and the soffit of fixed ring piece is fixedly connected with connecting ring by multiple junction plate, and connecting ring is rotatably connected by the upper end of rolling bearing and main shaft 6.
As shown in Figure 5, power transmission shaft 20 comprises major axis, arc-like sheet and connection ring plate, the soffit connecting ring plate is fixedly connected with by the upper surface of screw with main shaft 6, and the upper surface connecting ring plate is fixedly connected with the lower end of major axis by multiple arc-like sheet, and the upper end of major axis is connected with upper instrument room 7.
The operating principle of the present invention's huge geotechnical centrifuge large discharge water circulation system is as follows:
Huge geotechnical centrifuge is the asymmetric arm configuration of single hanging basket, hanging basket and model casing 13 are installed in pivoted arm 11 one end, and the other end arranges balancing weight, and pivoted arm 11 is arranged on main shaft 6, and rotate to produce centrifugal acceleration with main shaft 6, thus provide super gravity field for centrifugal test.
In model casing 13, carry out reservoir dam burst and destroy the multi-scenarios method centrifugal test research of centrifuge modelling tests or fluid and earthen structure, the test water of flow model case 13 per hour exceedes tens of cubic meter, the water flowed out after test is also entrained with the solid particles such as silt, and the water circulation system that this patent proposes can realize water supply and the recovery of above-mentioned operating mode.
When centrifuge run to certain acceleration need to model casing 13 water filling time, by the water pump 4 controlling water system, the water of collecting-tank 19 is pumped by test requirements document flow velocity and flow by the first water inlet pipe 2, and inject annular water tank 8 by the second water inlet pipe 5, annular water tank 8 is stretched in the termination, water side of the second water inlet pipe 5, and certain safe spacing is maintained with it, the calabash shaped structure of annular water tank 8 can prevent the water injected from dishing out from tank port under centrifugal action simultaneously, the water injected will under gravity, the 3rd water inlet pipe 9 be arranged in main shaft 6 cavity is flowed into from annular water tank 8 bottom opening, then the 4th water inlet pipe 12 being arranged on pivoted arm 11 is entered, and under centrifugal action, test water arrival mode case 13.
After water completes test in model casing 13, muddy water in model casing 13 flows into scupper hose 22 from its delivery port, scupper hose 22 can shorten the distance of delivery port and garland 14 bottom model casing 13, simultaneously with the acting in conjunction of dash grid 23 under can prevent large discharge muddy water from spraying into garland 14 time splash everywhere, the muddy water of collection is discharged from its delivery port by garland 14.
The muddy water spraying into garland 14 flows into filtering ponds 17 through its delivery port and outlet pipe, the filter arranged in filtering ponds 17, can carry out repeatedly sedimentation and filtration process to the muddy water flowed into, the water after process comes together in collecting-tank 19, is then recycled by water system.
Technical scheme of the present invention is not limited to the restriction of above-mentioned specific embodiment, the technology distortion that every technical scheme according to the present invention is made, and all falls within protection scope of the present invention.
Claims (9)
1. a huge geotechnical centrifuge large discharge water circulation system, comprise unit room, main shaft, pivoted arm, model casing and upper instrument room, described pivoted arm is fixedly mounted on described main shaft by the installing hole of its center of rotation, the lower end of described main shaft is fixedly connected with the inner bottom surface of described unit room by transmission supporting, the upper end of described main shaft is fixedly connected with by the inner top surface of upper supporting with described unit room, described upper instrument room is arranged on the upper end face of described unit room, and be connected by the upper surface of power transmission shaft with described main shaft, described model casing is arranged in the hanging basket of described pivoted arm first end, second end of described pivoted arm is provided with balancing weight, it is characterized in that: also comprise annular water tank, water system, 3rd water inlet pipe and the 4th water inlet pipe, the water side of described water system is arranged in described annular water tank, described main shaft is hollow shaft, described annular water tank to be fixedly connected with the upper end of described main shaft by screw and to be positioned at the top of described upper supporting, described annular water tank bottom is provided with delivery port, in the cavity that described 3rd water inlet pipe is arranged on described main shaft and the water inlet end of described 3rd water inlet pipe be connected with the delivery port of described annular water tank, the water side of described 3rd water inlet pipe is connected with the water inlet end of described 4th water inlet pipe through the through hole of described main shaft sidewall, described 4th water inlet pipe is arranged on described pivoted arm, water side and the described model casing of described 4th water inlet pipe are connected, the inwall of described unit room is provided with garland in the position with described pivoted arm level, the bottom of described garland is provided with delivery port.
2. huge geotechnical centrifuge large discharge water circulation system according to claim 1, it is characterized in that: described water system comprises the first water inlet pipe, the second water inlet pipe and water pump, the water side of described first water inlet pipe is connected with the water inlet end of described water pump, the water side of described water pump is connected with the water inlet end of described second water inlet pipe, and the water side of described second water inlet pipe is arranged in described annular water tank.
3. huge geotechnical centrifuge large discharge water circulation system according to claim 1 and 2, it is characterized in that: also comprise return water system, described return water system comprises filtering ponds and collecting-tank, filter is provided with in described filtering ponds, the water inlet of described filtering ponds is connected by the delivery port of outlet pipe and described garland, the delivery port of described filtering ponds 17 and the water inlet of described collecting-tank are connected, and the water inlet end of described first water inlet pipe is arranged in described collecting-tank.
4. huge geotechnical centrifuge large discharge water circulation system according to claim 3, it is characterized in that: described filtering ponds are also divided into soil chamber and clear water chamber by the horizontal or vertical setting of described filter, described soil chamber and described garland are connected, described clear water chamber and described collecting-tank are connected, described filter comprises two-layer screen pack and quartz sand, and two-layer described screen pack be arranged in parallel and described quartz sand is arranged on its interlayer inside.
5. huge geotechnical centrifuge large discharge water circulation system according to claim 1, it is characterized in that: also comprise multiple dash grid and scupper hose, one end of described scupper hose is fixedly connected with the delivery port of described model casing, and multiple described dash grid is evenly arranged on described garland inside and is fixedly connected with the bottom surface of described garland.
6. huge geotechnical centrifuge large discharge water circulation system according to claim 5, it is characterized in that: the angle of the plane at the tangent line place of the plane at described dash grid place and the tie point of described dash grid and described garland bottom surface is acute angle, and the incline direction of described dash grid is contrary with the direction of rotation of described pivoted arm.
7. huge geotechnical centrifuge large discharge water circulation system according to claim 1, it is characterized in that: described upper supporting comprises junction plate, fixed ring piece and connecting ring, the upper surface of described fixed ring piece is fixedly connected with the inner top surface of described unit room, the soffit of described fixed ring piece is fixedly connected with described connecting ring by multiple described junction plate, and described connecting ring is rotatably connected by the upper end of rolling bearing and described main shaft.
8. huge geotechnical centrifuge large discharge water circulation system according to claim 1, it is characterized in that: described power transmission shaft comprises major axis, arc-like sheet and connection ring plate, the soffit of described connection ring plate is fixedly connected with by the upper surface of screw with described main shaft, the upper surface of described connection ring plate is fixedly connected with the lower end of described major axis by multiple described arc-like sheet, and the upper end of described major axis is connected with described upper instrument room.
9. huge geotechnical centrifuge large discharge water circulation system according to claim 1, is characterized in that: described annular water tank is the calabash shape water tank removing end face.
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| WO2020220428A1 (en) * | 2019-04-28 | 2020-11-05 | 浙江大学 | Vacuum cavity structure of ultra-high-gravity geotechnical centrifugal device |
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| CN107694771B (en) * | 2017-11-14 | 2024-05-10 | 中国工程物理研究院总体工程研究所 | Adjustable gravity center counterweight device of geotechnical centrifuge |
| CN108772211A (en) * | 2018-07-27 | 2018-11-09 | 中国工程物理研究院总体工程研究所 | Geotechnical centrifuge dynamic equilibrium regulating system |
| WO2020220428A1 (en) * | 2019-04-28 | 2020-11-05 | 浙江大学 | Vacuum cavity structure of ultra-high-gravity geotechnical centrifugal device |
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Application publication date: 20141224 |