CN111504601A - Adjustable fluid uniform flow experiment platform - Google Patents

Abstract

The present invention proposes an adjustable fluid uniform flow experimental platform. Two-stage pipeline components are placed inside the experimental platform. The diameter, material and length of each pipeline component are the same, and the length is slightly smaller than the distance between the fixed plates 13 on both sides. The pipeline components are all in the equilateral triangle stacking method. The diameter of the primary pipeline component 2 is larger than the diameter of the secondary pipeline component 3. The specific diameters of the two can be adjusted according to the experimental accuracy and experimental requirements. In order to maintain the flow stability of the test area 4 The upstream and downstream components of the test area 4 are completely symmetrical, and the invention has the advantages of convenient replacement, flexible experiment and wide application range.

Description

An adjustable fluid uniform flow experimental platform

technical field

The invention relates to the technical fields of marine engineering, chemical machinery, fluid mechanics and the like, in particular to an adjustable fluid uniform fluid experimental platform.

Background technique

In the fields of chemical machinery, marine engineering, etc., it is often necessary to test the performance parameters of an underwater operating equipment in flowing waters, such as power, thrust, resistance, etc. Due to the limitation of experimental conditions, these devices are often tested in still water, and the measured data is checked with an empirical coefficient, and the obtained data is approximated as the data in the dynamic domain. The data obtained by this method has poor reliability and low precision. In recent years, many scientific research institutes have begun to design uniform flow experimental devices by themselves, but most of them have shortcomings such as large resistance, high unevenness of flow velocity, and inconvenient disassembly of components.

The present invention designs an adjustable fluid uniform flow experiment device, which adopts multi-stage pipeline sections with different diameters as internal components, each group of components is formed by stacking pipelines of the same diameter, and has the advantages of simple structure, convenient preparation of components, The advantages of different pipe diameter components can be installed according to different precision requirements.

SUMMARY OF THE INVENTION

The purpose of the present invention is to propose an adjustable fluid uniform flow experimental platform, in which the components that play the role of homogenizing fluid flow are composed of pipes of different diameters. Change or adjust the diameter of pipe components at any time to achieve the purpose of uniform fluid flow.

The technical scheme of the present invention is as follows:

An adjustable fluid uniform flow experiment platform, consisting of a circulating water tank 1, a primary pipe assembly 2, a secondary pipe assembly 3, a test area 4, a secondary symmetrical pipe assembly 5, a primary symmetrical pipe assembly 6, a buffer zone 7, Symmetrical buffer area 8, baffle area 9, symmetrical baffle area 10, grid plate 11, symmetrical grid plate 12, fixed plate 13, circulating water pump 14, valve 15, flow meter 16, circulating pipe 17. The water enters the buffer zone 7 from the baffle zone 9 through the grid plate 11, and then reaches the test zone 4 through the primary pipe assembly 2 and the secondary pipe assembly 3 in turn. In order to ensure the stability of the uniform flow of the fluid, after the test area 4, the water sequentially passes through the secondary symmetrical pipe assembly 5, the primary symmetrical pipe assembly 6, the symmetrical buffer zone 8, and the symmetrical grid strip 12, and finally reaches the symmetrical baffle area 10. , A circulating water pump 14 is placed in the symmetrical baffle area 10. The fluid is powered by the circulating water pump 14, passes through the circulating pipe 17, and returns to the baffle area 9 to form a circulating flow of water.

The circulating water tank 1 is an open rectangular tank, which is made of transparent plexiglass. Except for the baffle area 9 and the symmetrical baffle area 10, its cross section is rectangular, and the width and height of the rectangle are in the range of Within 0.5-2m, it depends on the size of the test instrument placed in the test area 4.

The first-stage pipeline assembly 2 is composed of pipes of equal length and the same diameter, and the material can be stainless steel, carbon steel, or plexiglass. The length of the pipe assembly 2 is slightly smaller than the distance between the two sides of the fixing plates 13 .

The secondary pipe assembly 3 is composed of pipes of the same length and the same diameter, and the material is not limited, which can be metal or non-metallic pipes. The diameter of the secondary pipe assembly 3 is smaller than the diameter of the primary pipe assembly 2. Both ends of the assembly 3 are fixed by the fixing plates 13 , and the length of the secondary pipeline assembly 3 is slightly smaller than the distance between the fixing plates 13 on both sides.

The test area 4 is the test area for measuring the device, the device can be placed on the bottom surface or suspended in the middle of the liquid, and no other components are placed inside.

The secondary symmetrical pipe assembly 5 is composed of pipes of equal length and diameter, the length and diameter of which are exactly the same as those of the secondary assembly 3 , and the placement position is symmetrical with respect to the test area 4 and the secondary pipe assembly 3 .

The first-stage symmetrical pipeline assembly 6 is composed of pipelines of the same length and the same diameter.

The grid strip 11 is made of transparent plexiglass, which is made by opening strip holes in the plexiglass plate, and is bonded to the circulating water tank 1 .

Said symmetrical grid strip 12 has the same material, structure and connection with the circulating water tank 1 as the grid strip 11 . The installation positions of the symmetrical grid strip 12 and the grid strip 11 are symmetrical relative to the circulating water tank 1 .

The baffle area 9 and the symmetrical baffle area 10 have the same volume, and both are realized by an inclined plate to change the flow direction of the fluid.

The power of the circulating water pump 14 is selected according to the different flow resistances and the different flow rates of the different placement components.

The flow velocity in the test area 4 is realized by adjusting the valve 15 and the flow meter 16 installed on the circulation pipe 17 .

The fixing plate 13 is a plurality of rectangular plates, made of plexiglass, and is connected to the circulating water tank 1 by gluing.

The innovation of the present invention is that an adjustable fluid uniform flow experimental platform is developed, which can adjust the fluid flow uniformity in the test area by replacing or adjusting the diameters of the primary and secondary pipeline components. Simple, easy to replace components, and suitable for a wide range of flow rates.

Description of drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only These are some embodiments of the present invention, and for those of ordinary skill in the art, other drawings can also be obtained from these drawings without any creative effort.

Fig. 1 is the flow chart of the example of this application

Fig. 2 is the first-level pipeline assembly diagram in the example of the present application

Fig. 3 is the secondary pipeline assembly diagram in the example of the present application

FIG. 4 is a structural diagram of a grid strip in an example of the present application

Fig. 5 is the structure diagram of the fixed plate in the example of the present application

In Figures 1-5, 1. Circulating water tank, 2. Primary pipeline assembly, 3. Secondary pipeline assembly, 4. Test area, 5. Secondary symmetrical pipeline assembly, 6. Primary symmetrical pipeline assembly, 7. Buffer Zone, 8. Symmetrical buffer zone, 9. Baffle zone, 10. Symmetrical baffle zone, 11. Grid plate, 12. Symmetric grid plate, 13. Fixed plate, 14. Circulating water pump, 15. Valve, 16. Flow meter, 17. Circulation pipe

Detailed ways

An adjustable fluid uniform flow experiment platform proposed by the present invention has four areas for placing components fixed by a fixed plate, and pipe sections of a certain length and the same diameter are placed in this area. In order to meet the requirements of different flow rates and different fluid uniformity, the diameters of the first and second pipeline components can be larger or smaller, but at the same time, the The diameter, length, material, etc. of the secondary symmetric pipeline component and the secondary pipeline component are exactly the same, and the diameter, length, and material of the primary symmetric pipeline component and the primary pipeline component are exactly the same.

The adjustable fluid uniform flow experimental platform proposed by the present invention has the advantages of convenient replacement of components, simple component structure, and flexible and convenient use.

In order to better understand the above technical solutions, the above technical solutions will be described in detail below with reference to the accompanying drawings and specific embodiments.

As shown in Figures 1 to 5, an adjustable fluid uniform flow experimental platform includes a circulating water tank 1, a primary pipe assembly 2, a secondary pipe assembly 3, a test area 4, a secondary symmetrical pipe assembly 5, a primary Symmetrical pipeline assembly 6, buffer zone 7, symmetrical buffer zone 8, baffle zone 9, symmetrical baffle zone 10, grid plate 11, symmetrical grid plate 12, fixed plate 13, circulating water pump 14, valve 15, flow meter 16 , circulation pipe 17. After the fluid changes direction from the baffle 9, it first enters the buffer zone 7 through the grid plate 11, and then from the buffer zone 7 passes through the primary pipe assembly 2 and the secondary pipe assembly 3 to the test zone 4. The test zone 4 is placed to wait. In the area of the test component or equipment, the fluid enters the secondary symmetrical pipe assembly 5 and the primary symmetrical pipe assembly 6 from the test area 4 to the symmetrical buffer area 8, and then passes through the symmetrical grid plate 12 to the symmetrical baffle area 10, and then is circulated by the circulation. The water pump 14 is driven into the baffle area 9 to complete the circulation of the fluid.

Among them, the open water tank of the circulating water tank 1, except for the baffle area 9 and the symmetrical baffle area 10, has a rectangular cross section, and its length is much larger than the width and height of the cross section, and is made of transparent plexiglass.

Among them, the first-level pipeline assembly 2 is formed by stacking horizontal tubes of the same length and the same diameter. The stacking method is a regular triangle arrangement. Metal pipelines or non-metallic pipelines can be selected. The length of the pipelines is slightly smaller than the fixing plates 13 on both sides. Pitch.

Among them, the secondary pipeline assembly 3 is formed by stacking horizontal pipes of the same length and the same diameter. The stacking method is a regular triangle arrangement. Metal pipes or non-metal pipes can be selected. The length of the pipes is slightly smaller than the fixing plates 13 on both sides. distance, the diameter of the secondary pipe assembly 3 is smaller than the diameter of the primary pipe assembly 2.

Among them, the test area 4 is an area where the device or equipment to be tested is placed, and the fluid in this area is the fluid with the same velocity and the same direction.

The diameter, length and material of the secondary symmetric pipeline assembly 5 and the secondary pipeline assembly 3 are exactly the same, and the installation position is symmetrical with respect to the test area 4 .

Among them, the first-level symmetrical pipeline assembly 6 and the first-level pipeline assembly 2 have exactly the same pipeline diameter, length, and material, and the installation position is symmetrical with respect to the test area 4 .

Wherein, the fixing plate 13 is composed of several rectangular strip-shaped plates, and is connected with the circulating water tank 1 by bonding.

Among them, the grid strip 11 and the symmetrical grid strip 12 are supported by a plexiglass flat plate with strip holes on the top, and are connected with the circulating water tank 1 by bonding, and their positions are symmetrical with respect to the test area 4 .

Wherein, both the baffle area 9 and the symmetrical baffle area 10 realize the turning of the fluid through an inclined plate.

Among them, the flow rate of the test area 4 is obtained by adjusting the valve 15 and combining with the reading of the flow meter 16 .

Specific implementation effect 1

The length, width and height of the circulating water tank are 8000mm, 800mm and 1000mm respectively. There are 5*500 strip holes on the grid plate. The diameter of the primary pipe assembly is 20mm and the length is 500mm. The diameter of the secondary pipe assembly is 8mm and the length is 500mm. The fluid flow is 1000L/s, the filling level in the circulating water tank is 800mm, the average flow velocity of the fluid at 20 different points in the test area is 1.56m/s, and the fluid velocity unevenness is less than 0.002.

Specific implementation effect 2

The length, width and height of the circulating water tank are 8000mm, 1000mm and 1000mm respectively. There are 5*500 strip holes on the grid plate. The diameter of the primary pipe assembly is 18mm and the length is 500mm. The diameter of the secondary pipe assembly is 5mm and the length is 500mm. The fluid flow rate is 600L/s, the filling level in the circulating water tank is 800mm, the average flow velocity of the fluid at 20 different points in the test area is 0.75m/s, and the fluid velocity unevenness is less than 0.0025.

The above are only preferred embodiments of the present invention, and do not limit the present invention in any form. Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Technical personnel, within the scope of the technical solution of the present invention, can make some changes or modifications to equivalent embodiments of equivalent changes by using the technical content disclosed above, but any content that does not depart from the technical solution of the present invention, according to the present invention Any simple modifications, equivalent changes and modifications made to the above embodiments still belong to the scope of the technical solutions of the present invention.

Claims (9)

1. An adjustable fluid uniform flow experiment platform, comprising a circulating water tank 1, a primary pipe assembly 2, a secondary pipe assembly 3, a test area 4, a secondary symmetrical pipe assembly 5, a primary symmetrical pipe assembly 6, a buffer zone 7. Symmetrical buffer area 8, baffle area 9, symmetrical baffle area 10, grid plate 11, symmetrical grid plate 12, fixed plate 13, circulating water pump 14, valve 15, flow meter 16, circulating pipe 17. After the fluid changes direction from the baffle 9, it first enters the buffer zone 7 through the grid plate 11, and then from the buffer zone 7 passes through the primary pipe assembly 2 and the secondary pipe assembly 3 to the test zone 4. The test zone 4 is placed to wait. In the area of the test component or equipment, the fluid enters the secondary symmetrical pipe assembly 5 and the primary symmetrical pipe assembly 6 from the test area 4 to the symmetrical buffer area 8, and then passes through the symmetrical grid plate 12 to the symmetrical baffle area 10, and then is circulated by the circulation. The water pump 14 is driven into the baffle area 9 to complete the circulation of the fluid. 2. a kind of adjustable fluid uniform flow experiment platform according to claim 1 is characterized in that, the circulating water tank 1 is an open water tank, and its cross section is a rectangle except the baffle area 9 and the symmetrical baffle area 10 , whose length is much larger than the width and height of the cross-section, and is made of transparent plexiglass. 3. A kind of adjustable fluid uniform flow experimental platform according to claim 1, is characterized in that, the first-level pipeline assembly 2 is formed by stacking horizontal pipes of the same length and the same diameter, and the stacking method is a regular triangle. For the arrangement, metal pipes or non-metal pipes can be selected, and the length of the pipes is slightly smaller than the distance between the fixing plates 13 on both sides. 4. An adjustable fluid uniform flow experimental platform according to claim 1, wherein the secondary pipeline assembly 3 is formed by stacking horizontal pipes of the same length and the same diameter, and the stacking method is a regular triangle. Arrangement, metal pipes or non-metal pipes can be selected, the length of the pipes is slightly smaller than the distance between the two sides of the fixing plates 13 , and the diameter of the secondary pipe assembly 3 is smaller than the diameter of the primary pipe assembly 2 . 5. a kind of adjustable fluid uniform flow experimental platform according to claim 1, is characterized in that, the pipeline diameter, length, material of the secondary symmetric pipeline assembly 5 and the secondary pipeline assembly 3 are completely identical, and the installation positions are relative to each other. Symmetrical in test area 4. 6. A kind of adjustable fluid uniform flow experiment platform according to claim 1 is characterized in that, the pipeline diameter, length and material of the first-level symmetrical pipeline assembly 6 and the first-level pipeline assembly 2 are exactly the same, and the installation positions are opposite to each other. Symmetrical in test area 4. 7 . The adjustable fluid uniform flow experimental platform according to claim 1 , wherein the fixed plate 13 is composed of several rectangular strip-shaped plates, and is connected with the circulating water tank 1 by bonding. 8 . 8. A kind of adjustable fluid uniform flow experiment platform according to claim 1 is characterized in that, grid strip 11 and symmetrical grid strip 12 pass through a plexiglass flat plate, and the above is supported by strip-shaped holes, which is connected with the circulating water tank. 1 are connected together by gluing, and the two positions are symmetrical with respect to the test area 4. 9. a kind of adjustable fluid uniform flow experiment platform according to claim 1, is characterized in that, baffle area 9 and symmetrical baffle area 10 all realize the turning of fluid by an inclined plate; The flow velocity size of test area 4 , obtained by adjusting the valve 15 in combination with the reading of the flow meter 16 .

Images