CN206134047U

CN206134047U - Hourglass shape wishes sieve fountain presentation device

Info

Publication number: CN206134047U
Application number: CN201620869620.3U
Authority: CN
Inventors: 刘军华; 肖宾宾
Original assignee: Hunan Institute of Technology
Current assignee: Hunan Institute of Technology
Priority date: 2016-08-12
Filing date: 2016-08-12
Publication date: 2017-04-26
Anticipated expiration: 2026-08-12

Abstract

The utility model provides a hourglass shape wishes sieve fountain presentation device, relate to teaching instrument technical field, including last water storage chamber, lower water storage chamber, 1 number pipeline, 2 number pipeline, 3 number pipeline, 4 number pipeline, the last fountain and the lower fountain of closed, it is located water storage chamber top down to go up the water storage chamber, go up the fountain and locate water storage chamber top, water storage chamber below is located down to the fountain down, 1 number pipeline will descend water storage chamber and last fountain intercommunication, 2 water storage chamber and fountain intercommunication down will be gone up to number pipeline, 3 number pipeline will descend water storage chamber and fountain intercommunication down, 4 water storage chamber and last fountain intercommunication will be gone up to number pipeline, 1 the lower port of number pipeline is less than the last port of no. 3 pipelines, 1 the last port of number pipeline is less than the last port of no. 4 pipelines, 2 the last port of number pipeline is higher than the lower port of no. 4 pipelines, 2 the lower port of number pipeline is higher than the lower port of no. 3 pipelines. This hourglass shape wishes sieve fountain presentation device simple structure, low in manufacturing cost are honest and clean, the extensive popularization and application of being convenient for.

Description

A kind of uncommon sieve fountain apparatus for demonstrating of hourglass shape

Technical field

This utility model is related to teaching instrument and equipment technical field, the uncommon sieve fountain demonstration dress of more particularly to a kind of hourglass shape Put.

Background technology

One famous scientist of Xi Luoshi ancient Greek and inventor, its foremost invention is exactly uncommon sieve fountain.It is uncommon The operation principle of sieve fountain mainly uses the water-head between different vessels, produces potential energy and carrys out compressed air, so as to drive water past Upper injection, most intuitively effect is exactly that the water column sprayed in the case of without additionaling power can exceed that highest liquid level to uncommon sieve fountain, People see first uncommon sieve fountain often it is surprised endlessly, it is believed that it has run counter to physics conservation law, in classroom instruction, Jiao Shidan Student is often made it difficult for be expressly understood the principle of uncommon sieve fountain with word picture.

The Chinese utility model patent and Application No. of the Application No. " 201620781680X " submitted to before applicant " 2016105856826 " although patent of invention student can be helped to be more clearly understood that uncommon sieve fountain principle, it is real above There is to circulate demonstration with new patent, and foregoing invention patent to face complex structure, manufacturing cost higher Problem.

Utility model content

The technical problems to be solved in the utility model is to provide uncommon sieve of a kind of simple structure, hourglass shape cheap for manufacturing cost Fountain apparatus for demonstrating.

In order to solve above-mentioned technical problem, this utility model is adopted the following technical scheme that：A kind of uncommon sieve fountain of hourglass shape is drilled Showing device, including upper water storage cavity, lower water storage cavity, No. 1 pipeline, No. 2 pipelines, No. 3 pipelines and No. 4 pipelines, the upper water storage cavity position In lower water storage cavity top, a kind of uncommon sieve fountain apparatus for demonstrating of hourglass shape also includes the upper fountain and lower fountain of closed, , located at upper water storage cavity top, the lower fountain is located at lower water storage cavity lower section, the upper water storage cavity/lower water storage for the upper fountain Chamber/upper fountain/lower fountain opens up water filling port or liquid for forming fountain is loaded with inside it；

No. 1 pipeline connects lower water storage cavity with upper fountain, and No. 2 pipelines connect upper water storage cavity with lower fountain Logical, No. 3 pipelines connect lower water storage cavity with lower fountain, and No. 4 pipelines connect upper water storage cavity with upper fountain；

, less than the upper port of No. 3 pipelines, the upper port of No. 1 pipeline is less than No. 4 pipelines for the lower port of No. 1 pipeline Upper port, higher than the lower port of No. 4 pipelines, the lower port of No. 2 pipelines manages higher than No. 3 for the upper port of No. 2 pipelines The lower port in road.

Used as the preferred version on the basis of aforementioned schemes, a kind of uncommon sieve fountain apparatus for demonstrating of hourglass shape includes a master Pipe, is provided with dividing plate in the supervisor, the inner chamber of supervisor is separated to form the upper water storage cavity and lower water storage cavity by the dividing plate, described Upper water storage cavity is located at dividing plate top, and the lower water storage cavity is located at dividing plate lower section.

It is furthermore preferred that No. 1 pipeline, No. 2 pipelines, No. 3 pipelines and No. 4 pipelines are in supervisor.

As further improving, a three holes pipe is provided with the supervisor；

Two pipelines in the pipe of three hole correspond to respectively No. 1 pipeline and No. 2 pipelines, be provided with a remaining pipeline every The pipeline is separated into epimere and hypomere by block piece, the retaining piece, and the epimere corresponds to No. 4 pipelines, and the hypomere corresponds to 3 Number pipeline；

The upper and lower termination closing of two pipelines of No. 1 pipeline and No. 2 pipelines, No. 1 pipe are corresponded in the pipe of three hole The lower port of the upper port and lower port in road, the upper port of No. 2 pipelines and lower port, the upper port of No. 3 pipelines and No. 4 pipelines is led to Cross the radial aperture on the tube wall of three hole pipes to be formed.

Preferably, the upper port of No. 1 pipeline is located at the bottom of upper fountain, lower port and is located at the bottom of lower water storage cavity Portion；

The upper port of No. 2 pipelines is located at the top of upper water storage cavity, lower port and is located at the top of lower fountain；

The upper port of No. 3 pipelines is located at the top of lower water storage cavity, lower port and is located in lower fountain；

The lower port of No. 4 pipelines is located at the bottom of upper water storage cavity, upper port and is located in upper fountain.

Further, the bottom of No. 3 pipelines and the top of No. 4 pipelines are provided with nozzle, in the hole for water spraying of the nozzle Footpath is less than No. 3 pipelines and the internal diameter of No. 4 pipelines.

Wherein, the upper and lower termination of two pipelines of No. 1 pipeline and No. 2 pipelines is corresponded in the pipe of three hole by elasticity Plug/PUR closing, the retaining piece is cylindrical chock made by elastomeric material.

Preferably, it is mounted on being easy to the uncommon sieve fountain apparatus for demonstrating of the hourglass shape on the upper fountain and lower fountain Setting is positioned over the bearing of desktop.

Preferably, the supervisor, No. 1 pipeline, No. 2 pipelines, No. 3 pipelines, No. 4 pipelines, upper fountain and lower fountains are complete Made using transparent material in portion.

The upper and lower ends of the uncommon sieve fountain apparatus for demonstrating of hourglass shape that this utility model is provided are provided with fountain, actually make Used time only needs constantly to reverse the i.e. achievable circulation water spray of apparatus for demonstrating, and in this utility model, fountain adopts closed structure The problem that water volatilizees and fountain water column is affected by outer gas stream can be avoided.Particular, it is important that whole apparatus for demonstrating is main By two water storage cavities (upper water storage cavity and lower water storage cavity), two fountains (upper fountain and lower fountain) and 4 pipelines (No. 1 Pipeline, No. 2 pipelines, No. 3 pipelines and No. 4 pipelines) constitute, overall structure is extremely simple, and manufacture difficulty is low, with low cost.

Description of the drawings

Fig. 1 is the overall structure diagram of embodiment 1 in this utility model；

Fig. 2 is the overall structure diagram of embodiment 2 in this utility model；

Fig. 3 is the overall structure diagram of another embodiment of this utility model in addition to embodiment 1 and 2；

In figure：

1 --- supervisor 3 --- upper fountain 4 --- lower fountain

5 --- dividing plate 6 --- nozzle 7 --- bearings

8 --- three hole pipe 1a --- upper water storage cavity 1b --- lower water storage cavities

2a --- No. 1 pipeline 2b --- No. 2 pipeline 2c --- No. 3 pipelines

2d --- No. 4 pipeline 8a --- retaining piece.

Specific embodiment

In description of the present utility model, it is to be understood that term " on ", D score, " top ", " bottom ", " interior ", " outward ", The orientation or position relationship of the instructions such as " being higher than ", " being less than " is all based on orientation shown in the drawings or position relationship.For example at certain In one part, this utility model unification is in one end of top in figure and is referred to as " top " or " upper end ", and under being in figure One end of side is collectively referred to as " bottom " or " lower end ", likewise, the part of the top in figure is referred to as into " top ", and is in figure The part correspondence of middle lower section is referred to as " bottom ", so statement merely to make description of the present utility model simpler, conveniently, and not It is to indicate or imply that institute's finger must be with specific orientation, with specific azimuth configuration and operation, those skilled in the art It should be understood that because this utility model is uncommon sieve fountain circulation apparatus for demonstrating, circulation water spray is realized in presentation process, it is necessary to (using method of the apparatus for demonstrating is similar with hourglass, therefore the uncommon sieve fountain demonstration of referred to as a kind of hourglass shape is filled to turn apparatus for demonstrating Put), after apparatus for demonstrating is reversed, " bottom ", " bottom " before will be in original " top ", the top at " top ", and it Front " top ", " top " will correspondingly be in original " bottom ", the lower section of " bottom ", therefore the term in foregoing description orientation It is merely to illustrate corresponding component/position position in the accompanying drawings.

In addition, in this utility model, unless otherwise clearly defined and limited, term " installation ", " connected ", " company Connect ", the term such as " fixation " should be interpreted broadly, for example, it may be fixedly connected, or be detachably connected, or integratedly Connection；Can be joined directly together, it is also possible to be indirectly connected to by intermediary, for the ordinary skill in the art, Concrete meaning of the above-mentioned term in this utility model can as the case may be understood.

Utility model design is more fully understood from for the ease of those skilled in the art, with reference to 2 embodiments to this Utility model is further described.

Embodiment 1：

Referring to Fig. 1, a kind of uncommon sieve fountain apparatus for demonstrating of hourglass shape, including upper water storage cavity 1a, lower water storage cavity 1b, No. 1 pipeline 2a, No. 2 pipeline 2b, No. 3 pipeline 2c, No. 4 pipeline 2d, the upper fountain 3 of closed and lower fountains 4, upper water storage cavity 1a is located at Lower water storage cavity 1b tops, located at upper water storage cavity 1a tops, lower fountain 4 is located at lower water storage cavity 1b lower sections, upper water storage for upper fountain 3 3/ time fountain of fountain 4 opens up water filling port (water filling port is not shown in FIG, if not advance on water storage cavity 1b/ under the 1a/ of chamber It is packaged for forming the liquid of fountain in 3/ time fountain of fountain 4 on water storage cavity 1b/ under upper water storage cavity 1a/, then must opens Water injection hole) or liquid for forming fountain is loaded with inside it；

No. 1 pipeline 2a connects lower water storage cavity 1b with upper fountain 3, and No. 2 pipeline 2b are by upper water storage cavity 1a and lower fountain 4 Connection, No. 3 pipeline 2c connect lower water storage cavity 1b with lower fountain 4, and No. 4 pipeline 2d connect upper water storage cavity 1a with upper fountain 3 It is logical；

Upper port of the lower port of No. 1 pipeline 2a less than No. 3 pipeline 2c, the upper port of No. 1 pipeline 2a is less than No. 4 pipeline 2d Upper port, the lower port of the upper port of No. 2 pipeline 2b higher than No. 4 pipeline 2d, the lower port of No. 2 pipeline 2b is higher than No. 3 pipelines The lower port of 2c.

In the present embodiment, the course of work of the uncommon sieve fountain apparatus for demonstrating of hourglass shape is：As shown in figure 1, in upper fountain 3 Water under gravity No. 1 pipeline 2a of Jing is flowed downstream in lower water storage cavity 1b, No. 3 pipeline 2c of the air Jing in lower water storage cavity 1b In entering lower fountain 4, again No. 2 pipeline 2b of Jing are pressed in water storage cavity 1a the air in lower fountain 4, make in air pressure With under, the water in upper water storage cavity 1a is pressed into No. 4 pipelines and from it port sprays, and forms fountain.In the above-mentioned course of work, Water (water including spraying from No. 4 pipeline upper ports) in upper fountain 3 is constantly flowed in lower water storage cavity 1b, when water spray stops Afterwards, whole apparatus for demonstrating is reversed, the water in lower fountain 4 can flow downstream into water storage cavity by No. 2 pipeline 2b of Jing under gravity In 1a, with the water in aforementioned upper water storage cavity 1a be pressed into No. 4 pipelines and from it port spray to be formed fountain process it is similar, under Water in water storage cavity 1b is finally pressed in No. 3 pipeline 2c and sprays, so as to form fountain again.

It should be noted that, although in FIG, the uncommon sieve fountain apparatus for demonstrating of the hourglass shape includes a supervisor 1, supervisor 1 Its inner chamber is separated to form interior dividing plate 5 upper water storage cavity 1a and the lower water storage cavity positioned at the lower section of dividing plate 5 positioned at the top of dividing plate 5 1b, and No. 1 pipeline 2a, No. 2 pipeline 2b, No. 3 pipeline 2c and No. 4 pipeline 2d are in supervisor 1, but people in the art Member is it should be understood that such as in addition to scheme shown in Fig. 1, also there are other replacement schemes in this utility model, shown in Fig. 3, adopt two (, used as the first water storage cavity 1a, the inner chamber of lower water is used as the second water storage cavity for the inner chamber of top water tank for individual water tank independent of each other 1b) can equally realize goal of the invention.Additionally, the section of tubing in above-mentioned 4 pipelines or whole pipelines are arranged at into supervisor 1 Outside, the part connection corresponding with apparatus for demonstrating of the termination of the pipeline outside supervisor 1 is also feasible.For example In supervisor 1, No. 1 pipeline 2a and No. 2 pipeline 2b are located at outside supervisor 1, by No. 1 pipeline 2a for No. 3 pipeline 2c and No. 4 pipeline 2d Upper port be connected with upper fountain 3, lower port is connected with lower water storage cavity 1b, by the upper port of No. 2 pipeline 2b and upper water storage cavity 1a connections, lower port are connected (not shown in accompanying drawing) with lower fountain 4.

The upper and lower ends of the uncommon sieve fountain apparatus for demonstrating of hourglass shape in above-described embodiment are provided with fountain, actually used When only need constantly to reverse apparatus for demonstrating and be capable of achieving circulation water spray, in this utility model, fountain can using closed structure To avoid the problem that water volatilizees and fountain water column is affected by outer gas stream.More importantly be, whole apparatus for demonstrating mainly by Two water storage cavities (upper water storage cavity 1a and lower water storage cavity 1b), two fountains (upper fountain 3 and lower fountain 4) and 4 pipelines (No. 1 pipeline 2a, No. 2 pipeline 2b, No. 3 pipeline 2c and No. 4 pipeline 2d) are constituted, and overall structure is extremely simple, manufacture difficulty is low, into This is cheap.

Embodiment 2：

The present embodiment is the improvement project made on the basis of embodiment illustrated in fig. 1, as shown in Fig. 2 in the present embodiment, A three hole pipes 8 are provided with supervisor 1；

Two pipelines in three hole pipes 8 correspond to respectively No. 1 pipeline 2a and No. 2 pipeline 2b, are provided with a remaining pipeline The pipeline is separated into epimere and hypomere by retaining piece 8a, above-mentioned retaining piece 8a, and epimere corresponds to No. 4 pipeline 2d, and hypomere corresponds to 3 Number pipeline 2c；

The upper and lower termination that two pipelines of No. 1 pipeline 2a and No. 2 pipeline 2b are corresponded in above-mentioned three hole pipe 8 is closed, No. 1 The upper port and lower port of pipeline 2a, the upper port of No. 2 pipeline 2b and lower port, the upper port of No. 3 pipeline 2c and No. 4 pipeline 2d Lower port formed by the radial aperture on the tube wall of three hole pipes 8.

Preferably, the upper and lower termination that two pipelines of No. 1 pipeline 2a and No. 2 pipeline 2b are corresponded in above-mentioned three hole pipe 8 leads to Elastic plug/PUR closing is crossed, above-mentioned retaining piece 8a is cylindrical chock made by elastomeric material.

In embodiment shown in Fig. 1 and 3, the apparatus for demonstrating includes 4 pipelines, at least needs in dividing plate in manufacture process 5th, open up 5 holes (embodiment shown in Fig. 3 at least needs to open up 6 holes) on upper fountain 3, lower fountain 4 to install above-mentioned 4 Bar pipeline, the present embodiment by above-mentioned 4 pipelines by being integrated into a three hole pipes 8 so that need originally dividing plate 5, on spray water The hole count opened up on pond 3, lower fountain 4 is reduced to 3 by 5, and being so designed that can reduce lower upper fountain 3, upper water storage cavity The probability of gas leakage between 1a, lower water storage cavity 1b and lower fountain 4, is conducive to improving the airtight effect of whole device (because Fig. 1 Shown scheme at least needs to seal 5 hole positions, and it is 6 that scheme shown in Fig. 3 needs the hole position of sealing, and the present embodiment Scheme only needs to seal 3 hole positions, and in the case of sealing technology identical, in theory the probability of the latter's gas leakage is little Much), the assembly work amount reduced in apparatus for demonstrating production process is also helped in addition, 4 pipelines are integrated in a pipe, Assembly work efficiency can be to a certain extent improved, the cost of labor of assembling process is reduced.

Further, in the embodiment shown in Fig. 1,2,3, the upper port of No. 1 pipeline 2a is located at the bottom of upper fountain 3 Portion, lower port are located at the bottom of lower water storage cavity 1b；The upper port of No. 2 pipeline 2b is located at top, the lower port position of upper water storage cavity 1a In the top of lower fountain 4；The upper port of No. 3 pipeline 2c is located at the top of lower water storage cavity 1b, lower port and is located at lower fountain 4 In；The lower port of No. 4 pipeline 2d is located at the bottom of upper water storage cavity 1a, upper port and is located in upper fountain 3.

In this scenario, there is larger difference in height between the port of each pipeline, be so designed that and be conducive to improving apparatus for demonstrating Operation stability in the water-column and its presentation process of ejection, so that demonstrating effect is more ornamental.

Further, in embodiment shown in Fig. 1-3, can be with the top of the bottom of No. 3 pipeline 2c and No. 4 pipeline 2d Nozzle 6 (nozzle 6 is not shown in figures 1 and 3) is installed at end, and the hole for water spraying internal diameter of nozzle 6 is less than No. 3 pipeline 2c and No. 4 pipelines The internal diameter of 2d.Installing nozzle 6 additional on the top of the bottom of No. 3 pipeline 2c and No. 4 pipeline 2d can allow the water column of ejection thinner, more It is high so that the sight of fountain is more preferably.

As the preferred version on the basis of embodiment shown in Fig. 1-3, can be with upper fountain 3 and lower fountain 4 Upper installation is easy to erect the apparatus for demonstrating bearing 7 for being positioned over desktop.

Finally, in all of embodiment of the application, it is preferred that 1, No. 1 pipeline 2a of supervisor, No. 2 pipeline 2b, No. 3 pipes Road 2c, No. 4 pipeline 2d, upper fountain 3 and lower fountains 4 are all made using transparent material.Above-mentioned part is all using transparent Material is made can allow the whole service process of fountain more directly perceived visible, further increase the interesting of fountain demonstration and see Reward property, has preferably ensured classroom teaching effect.

Above-described embodiment is this utility model preferably implementation, and in addition, this utility model can be with other sides Formula realizes that any obvious replacement is in protection model of the present utility model on the premise of conceiving without departing from the technical program Within enclosing.

In order to allow those of ordinary skill in the art more easily understand this utility model relative to prior art improvement it Place, some accompanying drawings of the present utility model and description have been simplified, and for the sake of clarity, present specification is omitted one A little other elements, those of ordinary skill in the art should be aware that these elements for omitting also may make up in of the present utility model Hold.

Claims

1. a kind of uncommon sieve fountain apparatus for demonstrating of hourglass shape, including upper water storage cavity (1a), lower water storage cavity (1b), No. 1 pipeline (2a), 2 Number pipeline (2b), No. 3 pipelines (2c) and No. 4 pipelines (2d), the upper water storage cavity (1a) is located at lower water storage cavity (1b) top, and it is special Levy and be：Also including the upper fountain (3) and lower fountain (4) of closed, the upper fountain (3) is located at upper water storage cavity (1a) Top, the lower fountain (4) is located at lower water storage cavity (1b) lower section, the upper water storage cavity (1a)/lower water storage cavity (1b)/upper water spray Pond (3)/lower fountain (4) opens up water filling port or liquid for forming fountain is loaded with inside it；

No. 1 pipeline (2a) connects lower water storage cavity (1b) with upper fountain (3), and No. 2 pipelines (2b) are by upper water storage cavity (1a) connect with lower fountain (4), No. 3 pipelines (2c) connect lower water storage cavity (1b) with lower fountain (4), described No. 4 Pipeline (2d) connects upper water storage cavity (1a) with upper fountain (3)；

The lower port of No. 1 pipeline (2a) is less than the upper port of No. 3 pipelines (2c), and the upper port of No. 1 pipeline (2a) is low In the upper port of No. 4 pipelines (2d), the upper port of No. 2 pipelines (2b) higher than No. 4 pipelines (2d) lower port, described No. 2 Lower port of the lower port of pipeline (2b) higher than No. 3 pipelines (2c)；

It is mounted on being easy to a kind of uncommon sieve fountain apparatus for demonstrating of hourglass shape on the upper fountain (3) and lower fountain (4) Setting is positioned over the bearing (7) of desktop.

2. hourglass shape according to claim 1 wishes sieve fountain apparatus for demonstrating, it is characterised in that：A kind of uncommon sieve spray of hourglass shape Spring apparatus for demonstrating includes a supervisor (1), and dividing plate (5) is provided with the supervisor (1), and the dividing plate (5) will be responsible for the inner chamber of (1) Be separated to form the upper water storage cavity (1a) and lower water storage cavity (1b), the upper water storage cavity (1a) is located at dividing plate (5) top, it is described under Water storage cavity (1b) is located at dividing plate (5) lower section.

3. a kind of hourglass shape according to claim 2 wishes sieve fountain apparatus for demonstrating, it is characterised in that：No. 1 pipeline (2a), No. 2 pipelines (2b), No. 3 pipelines (2c) and No. 4 pipelines (2d) are in supervisor (1).

4. hourglass shape according to claim 3 wishes sieve fountain apparatus for demonstrating, it is characterised in that：It is provided with the supervisor (1) Manage (8) in piece three holes；

Two pipelines in three hole pipe (8) correspond to respectively No. 1 pipeline (2a) and No. 2 pipelines (2b), a remaining pipeline Retaining piece is inside provided with, the pipeline is separated into epimere and hypomere by the retaining piece (8a), and the epimere corresponds to No. 4 pipelines (2d), the hypomere corresponds to No. 3 pipelines (2c)；

The upper and lower termination closing of two pipelines of No. 1 pipeline (2a) and No. 2 pipelines (2b), institute are corresponded in three hole pipe (8) State the upper port and lower port of No. 1 pipeline (2a), the upper port of No. 2 pipelines (2b) and lower port, the upper port of No. 3 pipelines (2c) And the lower port of No. 4 pipelines (2d) is formed by radial aperture on the tube wall that (8) are managed in three holes.

5. the uncommon sieve fountain apparatus for demonstrating of hourglass shape according to claim 3 or 4, it is characterised in that：

The upper port of No. 1 pipeline (2a) is located at the bottom of upper fountain (3), lower port and is located at the bottom of lower water storage cavity (1b) Portion；

The upper port of No. 2 pipelines (2b) is located at the top of upper water storage cavity (1a), lower port and is located at the top of lower fountain (4) Portion；

The upper port of No. 3 pipelines (2c) is located at the top of lower water storage cavity (1b), lower port and is located in lower fountain (4)；

The lower port of No. 4 pipelines (2d) is located at the bottom of upper water storage cavity (1a), upper port and is located in upper fountain (3).

6. hourglass shape according to claim 5 wishes sieve fountain apparatus for demonstrating, it is characterised in that：No. 3 pipelines (2c) The top of bottom and No. 4 pipelines (2d) is provided with nozzle (6), the hole for water spraying internal diameter of the nozzle (6) less than No. 3 pipelines (2c) and The internal diameter of No. 4 pipelines (2d).

7. hourglass shape according to claim 4 wishes sieve fountain apparatus for demonstrating, it is characterised in that：It is right in three hole pipe (8) The upper and lower termination of two pipelines of No. 1 pipeline (2a) and No. 2 pipelines (2b) be should be by elastic plug/PUR closing, it is described Retaining piece (8a) is cylindrical chock made by elastomeric material.

8. the uncommon sieve fountain apparatus for demonstrating of hourglass shape according to any one in claim 2-4, it is characterised in that：The master Pipe (1), No. 1 pipeline (2a), No. 2 pipelines (2b), No. 3 pipelines (2c), No. 4 pipelines (2d), upper fountain (3) and lower fountains (4) all made using transparent material.