CN115014705B - Turning-back water tank device and multi-group synchronous test method - Google Patents
Turning-back water tank device and multi-group synchronous test method Download PDFInfo
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- CN115014705B CN115014705B CN202210697795.0A CN202210697795A CN115014705B CN 115014705 B CN115014705 B CN 115014705B CN 202210697795 A CN202210697795 A CN 202210697795A CN 115014705 B CN115014705 B CN 115014705B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 196
- 238000010998 test method Methods 0.000 title claims abstract description 20
- 230000001360 synchronised effect Effects 0.000 title claims abstract description 12
- 238000012360 testing method Methods 0.000 claims abstract description 33
- 238000005192 partition Methods 0.000 claims abstract description 15
- 239000006260 foam Substances 0.000 claims description 5
- 239000011521 glass Substances 0.000 claims description 4
- 239000005341 toughened glass Substances 0.000 claims description 3
- 238000002474 experimental method Methods 0.000 claims description 2
- 238000004064 recycling Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 4
- 230000007704 transition Effects 0.000 abstract description 2
- 239000000463 material Substances 0.000 description 4
- 238000011160 research Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M10/00—Hydrodynamic testing; Arrangements in or on ship-testing tanks or water tunnels
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
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- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Aerodynamic Tests, Hydrodynamic Tests, Wind Tunnels, And Water Tanks (AREA)
Abstract
The invention provides a turn-back water tank device and a multi-group synchronous test method, comprising a water tank, n sections of water tank sections, n-1 sections of connecting pipe sections, a water tank and a pump; the n sections of water tanks are connected with each other through n-1 section connecting pipe sections in sequence, so that the n sections of water tanks form a turning structure in a vertical space; the connecting part of each water tank section is provided with a staggered rectifying system, the staggered rectifying system is formed by staggered superposition of a plurality of hollow partition boards, and the staggered rectifying system is perpendicular to the bottom of the water tank; the same flow test enables the incoming flow condition of each turning-back section to be consistent, the synchronism is good, and the comparison test precision is ensured. Each turning-back section observes certain physical quantity under different working conditions and flow states, and one test is equivalent to n groups of tests of the traditional method, so that the test efficiency is greatly improved. And rectification systems are arranged in rectangular pipes at two ends of the adjacent turning sections, and n-1 rectification systems are arranged in total, so that stable transition of water flow of the upper test section and the lower test section is ensured.
Description
Technical Field
The invention belongs to the field of hydraulic engineering and fluid mechanics, and particularly relates to a method and a device for carrying out multiple groups of synchronous tests on a foldback type water tank.
Background
The test water tank is important test equipment for developing researches on hydraulic engineering and fluid mechanics, and is an important tool for scientific research of technological workers. The quality of the results of the water tank test research is closely related to the water tank test method and the control precision of the test water tank, so that the control mode and the control precision of the test water tank equipment and the test method are continuously improved and improved.
The existing test water tanks are generally arranged in a plane, and the occupied area of the device is large. The water flow conditions among different groups of the traditional water tank test method are difficult to be strictly equal, the comparability is poor, and the accuracy of the comparison test is low; only one set of parameters can be obtained in one experiment, which is time-consuming and labor-consuming and has high test cost. In order to solve the problems of the device and the test method, the invention provides a foldback water tank device and a multi-group synchronous test method.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a turn-back water tank device and a multi-group synchronous test method for saving the occupied area and remarkably improving the test efficiency and the comparison precision of the water tank.
In order to achieve the above object, the technical scheme of the present invention is as follows:
a turn-back sink device comprising: the device comprises a pool, n sections of water tanks, n-1 sections of connecting pipe sections, a water tank and a pump; the n sections of water tanks are connected with each other through n-1 section connecting pipe sections in sequence, so that the n sections of water tanks form a turning structure in a vertical space; the connecting part of each water tank section is provided with a staggered rectifying system, the staggered rectifying system is formed by staggered superposition of a plurality of hollow partition boards, and the staggered rectifying system is perpendicular to the bottom of the water tank; the water tank is positioned above the turning-back structure, and the inlet of the first water tank section of the turning-back structure is connected with the water outlet of the water tank; the water pool is positioned below the foldback structure and is used for recycling water flowing out of the foldback structure; the pump is used for circularly conveying the water in the water tank to the water tank.
The water tank of the device turns back in the vertical space, and the occupied area is the non-turning back water tankn is the number of turns back; rectifying systems are arranged in rectangular pipes at two ends of adjacent foldback sections, and n-1 rectifying systems are used for ensuring that water flow of upper and lower test sections smoothly flowsPerforming transition; each turning section is provided with a slope adjusting device so as to adapt to tests with different slopes under the same flow; the return water tank completes the measurement of multiple groups of parameters in one test, and the synchronism is good; different physical quantities are observed by different turning-back sections so as to improve test efficiency and precision.
Further, two bearing columns for fixing the foldback structure are also included.
Further, the device also comprises 1 or more slope adjusting devices, one end of each slope adjusting device is arranged on the corresponding bearing column, the other end of each slope adjusting device is used for fixing the corresponding water tank section, and the gradient of the corresponding water tank section is adjusted by adjusting the fixed height of each slope adjusting device on the corresponding bearing column.
Further, the bottom of the water tank section is made of toughened glass, and two sides of the water tank section are made of organic glass.
Further, the hollow partition board is made of foam and/or sponge.
Further, the foam and sponge are stacked alternately. The water flow can pass through the holes of the partition plate, so that the rectification effect can be ensured while the water flow is stable, and the sufficient opportunity exchange among different water bodies can be ensured. The arc-shaped turning is arranged between the pipe sections, so that the energy loss is as small as possible when the water flow turns back.
Further, the holes of the hollowed-out partition plates are square holes.
According to the multi-group synchronous test method based on the turn-back water tank device, the gradient of each water tank section of the turn-back water tank device is adjusted according to the experimental requirements, water in a water tank is controlled to flow into the water tank section, certain physical quantities and distribution of the physical quantities in each water tank section are observed, and the multi-group synchronous test is completed.
The beneficial effects of the invention are as follows: the device is folded back and forth, the occupied area is small, and space resources are saved greatly; the contrast test of three flow states of slow flow, rapid flow and critical flow can be realized through the slope adjusting device. The test method can achieve the strict equality of flow conditions of different water tank sections in the same group, and the measured different physical quantities have high comparability.
Drawings
FIG. 1 is a front view of a foldback flume of the present invention;
FIG. 2 is a side view of a foldback flume of the present invention;
FIG. 3 is a schematic view of a hollow partition board according to the present invention;
fig. 4 is a schematic view of another hollow partition board according to the present invention.
In the figure, a pool 1, a pump 2, a water inlet pipe 3, a water tank 4, a valve 5, a first water tank section 6, a first connecting pipe section 7, a first auxiliary slope adjusting device 8, a second water tank section 9, a second connecting pipe section 10, a first staggered rectifying system 11, a slope adjusting device 12, a third water tank section 13, a third connecting pipe section 14, a second auxiliary slope adjusting device 15, a fourth water tank section 16, a first bearing column 17 and a second bearing column 18.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
As shown in fig. 1 to 2, a turn-back water tank device of the present invention includes: the water tank 1, n sections of water tank sections, n-1 sections of connecting pipe sections, a water tank 4 and a pump 2; the n sections of water tanks are connected with each other through n-1 section connecting pipe sections in sequence, so that the n sections of water tanks form a turning structure in a vertical space; the water tanks are vertically overlapped on the vertical space at set intervals, the section is rectangular, as shown in figure 2, the occupied area of the plane is small, and the occupied area is the non-foldback water tankThe test floor area is greatly saved. The adjacent turn-back sections, namely the joints of the water tank sections, are respectively provided with a staggered rectifying system, n-1 staggered rectifying systems are formed by stacking a plurality of hollow partition boards, the holes on the hollow partition boards can be square holes, round holes and the like, the holes are staggered by stacking the hollow partition boards, fig. 3 and 4 show an exemplary structure of two stacked hollow partition boards, the staggered rectifying systems are perpendicular to the bottoms of the water tanks, water flows can pass through the holes of the partition boards, the rectifying effect can be ensured while the stable water flows are kept, the full opportunity exchange between different water bodies can be ensured, the water flows of the upper water tank section and the lower water tank section are stably transited after the staggered rectifying systems, and the water flow states (flow and water depth) are kept consistent, so that a plurality of groups of synchronous tests can be realized; the pool 1 being located below the fold-back structure, e.g. mounted directly on the groundFor recovering water flowing out of the foldback structure. The pump 2, such as a variable frequency pump, is arranged in the water tank 1, so that water can be pumped from the water tank 1 to the upper water tank 4 at different flow rates, and the water tank 1 is connected with the water tank 4 through a water inlet pipe. The water tank 4 is located the top of turning back the structure, and the import of the first section basin section of turning back the structure links to each other with the delivery port of water tank 4, and the water tank opening sets up valve 5, and then rivers can get into first basin section under the action of gravity and form the open channel flow. Fig. 1 shows a turn-back water tank device comprising four water tank sections and three connecting pipe sections, wherein water flows from a first water tank section 6 to a second water tank section 9 in a turn-back way through a first connecting pipe section 7 and passes through a first staggered rectifying system 11, and the staggered stacked rectifying system can smooth water flow arrangement, so that upper water bodies and lower water bodies can be fully exchanged to enable flow rates to be distributed according to a natural form. Then the water enters the second water tank section 9 in the same water flow state, is turned back through the second connecting pipe section 10, flows to the third water tank section 13 in the same water flow state after being rectified by the second staggered rectifying system, is turned back through the third connecting pipe section 14, flows to the fourth water tank section 16 in the same water flow state after being rectified by the third staggered rectifying system, finally flows to the lower water tank 1, is pumped from the bottom water tank 1 into the upper water tank 4 through the 2 pump, the process of water body from the upper water tank 4 to the lower water tank 1 is completed by self-flowing under the action of gravity, and the water body is realized by pumping water from the lower water tank 1 to the upper water tank 4, thereby realizing the function of water body circulation.
Further, the connection part of each water tank section is provided with an arc-shaped turning, so that the energy loss is as small as possible when the water flow turns back. In addition, the material of fretwork baffle is foam and/or sponge etc. when adopting multiple material, the different material is also crisscross superpose.
The bottom of the water tank section is made of toughened glass, and two sides of the water tank section are made of organic glass. The reason is that: the water pressure born by the bottom of the water tank section is larger, so that the water tank is firmer; the side wall is made of organic glass, so that water can be blocked firmly to prevent the water from overflowing, and the self weight of the water tank can be reduced.
As a preferred aspect, the foldback flume device further includes two bearing columns for fixing the foldback structure: the first and second bearing columns 17 and 18 are used for fixing the turning structure and bear the total weight of the turning water tank. As shown in fig. 1, two bearing posts are provided on both sides of the fold-back structure, and can be fixed by ropes or the like.
Further, the connecting pipe section is made of deformable materials, such as rubber, and the turning-back water tank device further comprises 1 or more slope adjusting devices 12, one end of each slope adjusting device 12 is arranged on the bearing column, the other end of each slope adjusting device is used for fixing the water tank section, and the gradient of the water tank section is adjusted by adjusting the fixing height of each slope adjusting device 12 on the bearing column as shown in fig. 1. The gradient of the water tank is changed within a set range, the water tank is suitable for the test working conditions of different water tank gradients J under the same flow Q,n is roughness, which is related to the roughness of the bottom of the water tank, J is equal to the hydraulic gradient under the uniform flow condition, h is the water depth, B is the width of the water tank, and R is the hydraulic radius. Each turning section observes certain physical quantity and distribution thereof under different working conditions and flow states, and one test is equivalent to a plurality of groups of tests of the traditional method, and has good synchronism and greatly improves test efficiency and precision.
The slope adjusting device is arranged on the slope adjusting device, the slope adjusting device is not arranged on the slope adjusting device, and the slope adjusting device is arranged on the slope adjusting device and can be arranged according to actual needs.
The first water tank section 6 and the second water tank section 9 are set as gradient-adjustable water tank sections, and are realized through a gradient adjusting device. A fixed slope water tank section of the third water tank section 13 and the fourth water tank section 16. When the water flow in the third water tank section 13 is critical flow, the gradient of the second water tank section 9 is lifted, so that the gradient of the second water tank section 9 is larger than the critical gradient i, namely the second water tank section 9 can realize rapid flow, and the gradient of the first water tank section 6 is reduced to be smaller than the critical gradient i, namely the first water tank section 6 can realize slow flow. Therefore, the same group of tests can realize three flow states of slow flow, rapid flow and critical flow, and three groups of parameters of the three flow states are obtained, so that the contrast is good and the precision is high.
Further, an auxiliary slope adjusting device is further arranged on the slope-adjustable water tank section and is used for preventing the water tank section from cracking with the connecting pipe section when the slope adjusting device adjusts the slope water tank section to stretch upwards or downwards, as shown by a first auxiliary slope adjusting device 8 and a second auxiliary slope adjusting device 15 in fig. 1, the slope adjusting device is made of rubber, and auxiliary slope adjusting can be realized by being directly bound on a bearing column.
The device is folded back and forth, the occupied area is small, and space resources are saved greatly; the contrast test of three flow states of slow flow, rapid flow and critical flow can be realized through the slope adjusting device. The test method can achieve the strict equality of flow conditions of different water tank sections in the same group, and the measured different physical quantities have high comparability.
The invention is not a matter of the known technology.
The above embodiments are provided to illustrate the technical concept and features of the present invention and are intended to enable those skilled in the art to understand the content of the present invention and implement the same, and are not intended to limit the scope of the present invention. All equivalent changes or modifications made in accordance with the spirit of the present invention should be construed to be included in the scope of the present invention.
Claims (7)
1. A multi-group synchronous test method based on a turn-back water tank device is characterized by comprising the following steps of: the turn-back water tank device includes: the device comprises a pool, n sections of water tanks, n-1 sections of connecting pipe sections, a water tank and a pump; the n sections of water tanks are connected with each other through n-1 section connecting pipe sections in sequence, so that the n sections of water tanks form a turning structure in a vertical space; the floor area of the turn-back water tank device is a non-turn-back water tankThe connecting part of each water tank section is provided with a staggered rectifying system, the staggered rectifying system is formed by staggered superposition of a plurality of hollow partition boards, and the staggered rectifying system is perpendicular to the bottom of the water tank; the water tank is positioned above the turning-back structure, and the inlet of the first water tank section of the turning-back structure is connected with the water outlet of the water tank; the water pool is positioned below the foldback structure and is used for recycling water flowing out of the foldback structure; the pump is used for circularly conveying the water in the water tank to the water tank;
the multi-group synchronous test method based on the turn-back water tank device comprises the following steps:
according to the experiment requirement, the gradient of each water tank section of the turn-back water tank device is adjusted, so that the gradient of the water tank section is changed within a set range, the test working conditions of different water tank gradients J under the same flow Q are adapted, water in a water tank is controlled to flow into the water tank section, the physical quantity and the distribution of the physical quantity in each water tank section are observed, and a plurality of groups of synchronous tests are completed.
2. The multiple-set synchronization test method based on a turn-back water tank device according to claim 1, wherein: the turning-back water tank device further comprises two bearing columns used for fixing the turning-back structure.
3. The multiple-set synchronization test method based on the turn-back water tank device according to claim 2, wherein: the turning-back water tank device further comprises a plurality of slope adjusting devices, one ends of the slope adjusting devices are arranged on the bearing columns, the other ends of the slope adjusting devices are used for fixing the water tank sections, and the gradient of the water tank sections is adjusted by adjusting the fixed height of the slope adjusting devices on the bearing columns.
4. The multiple-set synchronization test method based on a turn-back water tank device according to claim 1, wherein: the bottom of the water tank section is made of toughened glass, and two sides of the water tank section are made of organic glass.
5. The multiple-set synchronization test method based on a turn-back water tank device according to claim 1, wherein: the hollow partition board is made of foam and/or sponge.
6. The multiple-set synchronization test method based on a turn-back water tank device according to claim 5, wherein: the foam and the sponge are stacked alternately.
7. The multiple-set synchronization test method based on a turn-back water tank device according to claim 1, wherein: the holes of the hollowed-out partition plates are square holes.
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| CN202210697795.0A CN115014705B (en) | 2022-06-20 | 2022-06-20 | Turning-back water tank device and multi-group synchronous test method |
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| CN202210697795.0A CN115014705B (en) | 2022-06-20 | 2022-06-20 | Turning-back water tank device and multi-group synchronous test method |
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| CN115014705B true CN115014705B (en) | 2024-01-02 |
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