CN102288384B - Large-scale unsteady flow decompression box - Google Patents
Large-scale unsteady flow decompression box Download PDFInfo
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- CN102288384B CN102288384B CN2011102144297A CN201110214429A CN102288384B CN 102288384 B CN102288384 B CN 102288384B CN 2011102144297 A CN2011102144297 A CN 2011102144297A CN 201110214429 A CN201110214429 A CN 201110214429A CN 102288384 B CN102288384 B CN 102288384B
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Abstract
The invention belongs to the field of hydraulic test equipment and relates to a large-scale unsteady flow decompression box for a lab. The large-scale unsteady flow decompression box comprises an upstream reservoir box, a downstream reservoir box, a test working section, a computer, an air-collecting tank, a vacuum pump, a reservoir air suction pipe and a test working section air suction pipe, wherein the air-collecting tank is connected with the vacuum pump; the reservoir air suction pipe and the test working section air suction pipe are connected with the air-collecting tank; the reservoir air suction pipe is connected with the upstream reservoir box and the downstream reservoir box; a downstream reservoir air suction pipe gate valve is arranged on a downstream air suction branch pipe; the test working section air suction pipe is connected with the test working section; a test working section air suction pipe gate valve is arranged on the test working section air suction pipe; a downstream reservoir air inlet pipe is arranged on the downstream reservoir box; and a downstream reservoir air inlet valve is arranged on the downstream reservoir air inlet pipe. The large-scale unsteady flow decompression box is easy and convenient to operate; a water pump is not arranged in a water return pipeline, so large-flow unsteady flow can be provided, the technical problems that the water pump is subjected to cavitation damage and the original unsteady flow continuous process cannot be stimulated in the decompression test can be solved; the water pump, for adjusting the upstream and downstream water flow, of the common decompression box is saved; work load and investment of civil engineering are saved; the test flow is simplified; water charge and electric charge are saved; and the test time is shortened.
Description
Technical field
The invention belongs to the hydraulics test apparatus field, relate to a kind of decompression cabinet, a kind of specifically laboratory is with large-scale unsteady flow decompression cabinet.
Background technology
At present in the hydraulic experiment chamber; Common decompression cabinet is made up of experiment work section, pumped vacuum systems, confession water return pipeline (water pump system must be set), and during test, opening and closing device is aperture fixedly; Be inconvenient to regulate, generally can only carry out the steady flow decompression test.The unsteady flow continuous process of test simulation and prototype has difference, especially supplies the water pump system that is provided with in the water return pipeline, for avoiding cavitation erosion, must be embedded in the experiment work section below 10 meters, and civil engineering workload and difficulty strengthen.Therefore need be a kind of easy and simple to handle, do not establish water pump in the water return pipeline, the unsteady flow decompression cabinet of big flow can be provided.
Summary of the invention
Technical matters to be solved by this invention is: have shortcoming to above prior art; A kind of large-scale unsteady flow decompression cabinet is proposed; Easy and simple to handle; In the water return pipeline water pump need not be set, big flow and unsteady flow can be provided, can solve water pump cavitation erosion in the decompression experiment, can not simulate the technical matters of the unsteady flow continuous process of prototype.
The technical scheme that the present invention solves above technical matters is:
Large-scale unsteady flow decompression cabinet comprises upper pond case, lower reservoir case, experiment work section and computing machine, is provided with model in the said experiment work section; Said upper pond case and lower reservoir case are through return pipe UNICOM; Said upper pond case connects the model of said experiment work section through water inlet pipe, and the model of experiment work section connects the lower reservoir case through rising pipe, and water inlet pipe is provided with the water inlet pipe gate valve; Rising pipe is provided with the rising pipe gate valve, and return pipe is provided with the return pipe gate valve; The junction of model and water inlet pipe is provided with the model by-pass valve control; The model by-pass valve control is connected with its hydraulic pressure opening/closing system of opening continuously of control; Be provided with the upper pond level sensor in the upper pond case; Be provided with level of tail water meter in the lower reservoir case, upper pond level sensor, level of tail water meter and hydraulic pressure opening/closing system are connected with computing machine; Also comprise air collector, vacuum pump, reservoir exhaust tube and experiment work section exhaust tube, air collector is connected with vacuum pump, and the reservoir exhaust tube all is connected with air collector with experiment work section exhaust tube; The reservoir exhaust tube connects upper pond case and lower reservoir case; Its (reservoir exhaust tube) is provided with upstream and downstream reservoir air pressure UNICOM gate valve; The reservoir exhaust tube that is connected with the upper pond case of upstream and downstream reservoir air pressure UNICOM gate valve one side is connected to air collector through upper reaches suction branch; Upper reaches suction branch is provided with upper pond exhaust tube gate valve; The reservoir exhaust tube that is connected with the lower reservoir case of upstream and downstream reservoir air pressure UNICOM gate valve one side is connected to said air collector through the downstream suction branch, and the downstream suction branch is provided with lower reservoir exhaust tube gate valve; Experiment work section exhaust tube connects the experiment work section, and its (experiment work section exhaust tube) is provided with experiment work section exhaust tube gate valve; Have the lower reservoir draft tube on the lower reservoir case, the lower reservoir draft tube is provided with the lower reservoir gas admittance valve.
Like this; In computing machine, set unsteady flow decompression cabinet water levels of upstream and downstream; When air pressure in the decompression cabinet reached the required vacuum tightness of test, the stroke of computer settings hydraulic stem sent a signal to the hydraulic pressure opening/closing system; The hydraulic pressure opening/closing system is received the motion of signal rear drive hydraulic stem, according to the running of computer settings; The by-pass valve control of model is opened in the experiment work section, current flow through upper pond, water inlet pipe, experiment work section, get into lower reservoir through rising pipe, when the upstream and downstream reservoir level flushed, this time unsteady flow process of the test finished; Link through the gate valve on upstream and downstream reservoir air pressure UNICOM gate valve, lower reservoir exhaust tube gate valve, experiment work section exhaust tube gate valve, upper pond exhaust tube gate valve, lower reservoir air inlet gate valve and the model inlet pipeline; Utilize the draught head of the lower reservoir and the upper pond water surface, realize the scheduling of lower reservoir current direction upper pond; When water levels of upstream and downstream and vacuum tightness reached the test desirable value, next process of the test began, and so back and forth, realized unsteady flow decompression test function.
The technical scheme that the present invention further limits is:
Aforesaid large-scale unsteady flow decompression cabinet; Upper pond case and lower reservoir case all comprise two diversion boxs at least; Be provided with inner coupling cock of balancing reservoir and reservoir internal regulation water pump between the adjacent diversion box, each diversion box directly is connected with the reservoir exhaust tube or is connected to the reservoir exhaust tube through arm.Upper pond and lower reservoir can and be regulated the purpose that water pump reaches the water level fine setting through the inner coupling cock of reservoir like this.
Advantage of the present invention is: the present invention regulates current through being provided with of each pipeline and valve, in the laboratory, can simulate the unsteady flow process, and simple to operate; The present invention regulates the upstream and downstream current through air pressure adjustment, has omitted the water pump that common decompression cabinet is regulated the upstream and downstream current, saves civil engineering workload and investment; In the process of the test, upper pond, lower reservoir can and be regulated the purpose that water pump reaches the water level fine setting through the inner coupling cock of reservoir, have simplified experiment process, have saved charges for water and electricity and test period; The present invention is easy and simple to handle, in the water return pipeline water pump need not be set, and big flow and unsteady flow can be provided, and can solve water pump cavitation erosion in the decompression experiment, can not simulate the technical matters of the unsteady flow continuous process of prototype.
Description of drawings
Fig. 1 is an elevational schematic view of the present invention.
Fig. 2 is a floor map of the present invention.
Embodiment
Embodiment 1
Present embodiment is a kind of large-scale unsteady flow decompression cabinet; Connect as depicted in figs. 1 and 2ly, comprise upper pond case 1, lower reservoir case 2, experiment work section 3 and computing machine, be provided with model 23 in the experiment work section 3; Upper pond case 1 passes through return pipe 6 UNICOMs with lower reservoir case 2; Upper pond case 1 is through the model 23 of the said experiment work section 3 of water inlet pipe 4 connections, and the model 23 of experiment work section 3 connects lower reservoir casees 2 through rising pipe 5, and water inlet pipe 4 is provided with water inlet pipe gate valve 11; Rising pipe 5 is provided with rising pipe gate valve 12, and 6 are provided with return pipe gate valve 13 on the return pipe; Model 23 is provided with model by-pass valve control 24 with the junction of water inlet pipe 4; Model by-pass valve control 24 is connected with its hydraulic pressure opening/closing system 22 of opening continuously of control; Be provided with upper pond level sensor 25 in the upper pond case 1; Be provided with level of tail water meter 26 in the lower reservoir case 2, upper pond level sensor 25, level of tail water meter 26 and hydraulic pressure opening/closing system 22 are connected with computing machine.Also comprise air collector 9, vacuum pump 10, reservoir exhaust tube 7 and experiment work section exhaust tube 8, air collector 9 is connected with vacuum pump 10, and connecting tube is provided with gate valve 18, and reservoir exhaust tube 7 all is connected with air collector 9 with experiment work section exhaust tube 8.Reservoir exhaust tube 7 connects upper pond case 1 and lower reservoir case 2; Which is provided with upstream and downstream reservoir air pressure UNICOM gate valve 14; The reservoir exhaust tube 7 that is connected with upper pond case 1 of upstream and downstream reservoir air pressure UNICOM gate valve 14 1 sides is connected to air collector 9 through upper reaches suction branch 28; Upper reaches suction branch 28 is provided with upper pond exhaust tube gate valve 17; The reservoir exhaust tube 7 that is connected with lower reservoir case 2 of upstream and downstream reservoir air pressure UNICOM gate valve 14 1 sides is connected to air collector 9 through downstream suction branch 29, and downstream suction branch 29 is provided with lower reservoir exhaust tube gate valve 15.Experiment work section exhaust tube 8 connects experiment work section 3, which is provided with experiment work section exhaust tube gate valve 16; Have the lower reservoir draft tube on the lower reservoir case 2, the lower reservoir draft tube is provided with lower reservoir gas admittance valve 19.Upper pond case 1 is made up of two branch reservoir casees, is provided with the inner coupling cock 20 of balancing reservoir between two branch reservoir casees and is connected to reservoir exhaust tube 7 with 21, two branch reservoirs of reservoir internal regulation water pump case through arm.Lower reservoir case 2 is made up of four branch reservoir casees, is provided with inner coupling cock 20 of balancing reservoir and reservoir internal regulation water pump 21 between the adjacent minute reservoir case, each minute the reservoir case be connected to reservoir exhaust tube 7 through arm.
The course of work of present embodiment is following:
(1) sets unsteady flow decompression cabinet upstream and downstream reservoir level in computing machine;
(2) starts vacuum pump 10; Open exhaust tube gate valve 18; Open upstream and downstream reservoir air pressure UNICOM gate valve 14, lower reservoir exhaust tube gate valve 15, experiment work section exhaust tube gate valve 16 and upper pond exhaust tube gate valve 17, when air pressure in the decompression cabinet reaches the required vacuum tightness of test, computer control hydraulic pressure opening/closing system 22; Send a signal to hydraulic pressure opening/closing system 22, hydraulic pressure opening/closing system 22 is received controlling models by-pass valve control 24 behind the signal;
(3) hydraulic pressure opening/closing system 22 driving model by-pass valve controls 24, current are from upper pond case 1, and through water inlet pipe 4, experiment work section 3, rising pipe 5 water inlets get into lower reservoir 2, and when the upstream and downstream reservoir level flushed, this time the unsteady flow process of the test finished;
(4) closes upstream and downstream reservoir air pressure UNICOM gate valve 14, lower reservoir exhaust tube gate valve 15, experiment work section exhaust tube gate valve 16, closes water inlet pipe gate valve 11 and rising pipe gate valve 12, opens return pipe gate valve 13; Open storehouse gas admittance valve 19 down; Lower reservoir water surface air pressure is risen gradually, and this moment, upper pond also vacuumized continuing, and water surface air pressure also descends continuing; Just vacuum tightness is also raising; Because the difference of upstream and downstream reservoir water surface air pressure, the current of lower reservoir flow to upper pond through water return pipeline, realize the scheduling of lower reservoir current direction upper pond;
In the (5) process of the test, upper pond, lower reservoir can and be regulated the purpose that water pump 21 reaches the water level fine setting through the inner coupling cock 20 of reservoir;
When (6) reaches the required water level of test when the upstream and downstream reservoir level, close lower reservoir gas admittance valve 19, open upstream and downstream reservoir air pressure UNICOM gate valve 14, lower reservoir exhaust tube gate valve 15 and experiment work section exhaust tube gate valve 16; Open model water inlet pipe and water outlet pipe gate valve 11,12; Vacuum pump continues the decompression cabinet system is bled, and when air pressure in the decompression cabinet reached the required vacuum tightness of test, next process of the test began; So back and forth, realize unsteady flow decompression test function.
The present invention can also have other embodiment, and the technical scheme that equal replacement of all employings or equivalent transformation form all drops within the scope of requirement protection of the present invention.
Claims (2)
1. large-scale unsteady flow decompression cabinet; Comprise upper pond case (1), lower reservoir case (2), experiment work section (3) and computing machine; Be provided with model (23) in the said experiment work section (3); Said upper pond case (1) and lower reservoir case (2) are through return pipe (6) UNICOM; Said upper pond case (1) is through the model (23) of water inlet pipe (4) the said experiment work section of connection (3), and the model (23) of said experiment work section (3) connects lower reservoir case (2) through rising pipe (5), and said water inlet pipe (4) is provided with water inlet pipe gate valve (11); Said rising pipe (5) is provided with rising pipe gate valve (12), and (6) are provided with return pipe gate valve (13) on the said return pipe; Said model (23) is provided with model by-pass valve control (24) with the junction of water inlet pipe (4); Said model by-pass valve control (24) is connected with its hydraulic pressure opening/closing system (22) of opening continuously of control; Be provided with upper pond level sensor (25) in the said upper pond case (1); Be provided with level of tail water meter (26) in the said lower reservoir case (2), said upper pond level sensor (25), level of tail water meter (26) and hydraulic pressure opening/closing system (22) are connected with computing machine; It is characterized in that: also comprise air collector (9), vacuum pump (10), reservoir exhaust tube (7) and experiment work section exhaust tube (8); Said air collector (9) is connected with vacuum pump (10), and said reservoir exhaust tube (7) all is connected with air collector (9) with experiment work section exhaust tube (8); Said reservoir exhaust tube (7) connects upper pond case (1) and lower reservoir case (2); Which is provided with upstream and downstream reservoir air pressure UNICOM's gate valve (14); The reservoir exhaust tube (7) that is connected with said upper pond case (1) of said upstream and downstream reservoir air pressure UNICOM gate valve (14) one sides is connected to said air collector (9) through upper reaches suction branch (28); Said upper reaches suction branches (28) are provided with upper pond exhaust tube gate valve (17); The reservoir exhaust tube (7) that is connected with said lower reservoir case (2) of said upstream and downstream reservoir air pressure UNICOM gate valve (14) one sides is connected to said air collector (9) through downstream suction branch (29), and said downstream suction branches (29) are provided with lower reservoir exhaust tube gate valve (15); Said experiment work section exhaust tube (8) connects experiment work section (3), which is provided with experiment work section exhaust tube gate valve (16); Have the lower reservoir draft tube on the said lower reservoir case (2), said lower reservoir draft tube is provided with lower reservoir gas admittance valve (19).
2. large-scale unsteady flow decompression cabinet as claimed in claim 1; It is characterized in that: said upper pond case (1) and lower reservoir case (2) all comprise two diversion boxs at least; Be provided with inner coupling cock (20) of balancing reservoir and reservoir internal regulation water pump (21) between the said adjacent diversion box, said each diversion box directly is connected with reservoir exhaust tube (7) or is connected to reservoir exhaust tube (7) through arm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102144297A CN102288384B (en) | 2011-07-28 | 2011-07-28 | Large-scale unsteady flow decompression box |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102144297A CN102288384B (en) | 2011-07-28 | 2011-07-28 | Large-scale unsteady flow decompression box |
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| CN102288384A CN102288384A (en) | 2011-12-21 |
| CN102288384B true CN102288384B (en) | 2012-11-21 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104198208B (en) * | 2014-09-19 | 2016-08-24 | 中国航天科技集团公司川南机械厂 | A kind of rapid decompression assay device |
| CN104503492B (en) * | 2014-12-15 | 2017-01-25 | 武汉大学 | Water level regulating device of sealed water tank |
| CN110703818B (en) * | 2019-10-28 | 2021-04-02 | 中国水利水电科学研究院 | Unsteady flow control system of hydropower station downstream model test |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101082535A (en) * | 2004-11-11 | 2007-12-05 | 西安交通大学 | Method for testing performance of micro-dimension labyrinth type unit flow passage waterpower |
| JP2008014885A (en) * | 2006-07-10 | 2008-01-24 | Nishi Nippon Ryutai Giken:Kk | Water tunnel device |
| CN202141579U (en) * | 2011-07-28 | 2012-02-08 | 水利部交通运输部国家能源局南京水利科学研究院 | Large unsteady flow decompression tank |
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2011
- 2011-07-28 CN CN2011102144297A patent/CN102288384B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101082535A (en) * | 2004-11-11 | 2007-12-05 | 西安交通大学 | Method for testing performance of micro-dimension labyrinth type unit flow passage waterpower |
| JP2008014885A (en) * | 2006-07-10 | 2008-01-24 | Nishi Nippon Ryutai Giken:Kk | Water tunnel device |
| CN202141579U (en) * | 2011-07-28 | 2012-02-08 | 水利部交通运输部国家能源局南京水利科学研究院 | Large unsteady flow decompression tank |
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