SELF-WEIGHTED WATER TANK DEVICE FOR SOLAR ENERGY SYSTEM

Abstract

A self-weighted water tank device for a solar energy system includes a plurality of water tanks to construct a water tank module for securing the whole system. A passage is configured between the water tanks of the module. The passage is at a certain highness of the tanks such that the water collected in the tanks can be maintained at a certain level. The water in the tank module can provide as a water supply source to provide water to satisfy the water demand of the demand side.

Description

BACKGROUND

1. Technical Field

The present invention relates to an infrastructure for a solar energy system and especially relates to a water tank module used as a self-weighted device for an infrastructure to secure the solar energy system.

2. Related Art

To maintain the natural environment is an important issue nowadays. Utilization of solar radiation to generate electricity is widely developed and promoted to replace thermoelectricity power or nuclear power. Solar panels are the core constituents of a solar energy system. A solar energy system is constructed by providing several supporting frames to configure a supporting body with a sunward side and installing a plurality of solar panels on the sunward side of the supporting body. Thus, the solar panels absorb and transform the solar radiation to electricity for supplying the power.

A solar energy system is usually constructed on the ground or at the sunny side of roofs of buildings. It is conventional to construct foundation piles on the roofs or ground for securing the supporting frames for installation of solar panels. The construction of the foundation piles are constructed by concrete work, it costs and spends a lot of time. The process of construction is also limited by the space of the working site.

It was suggested to utilize a plurality of water tanks as a foundation base for the solar energy system. The water tanks are individually fixed on the area covered by the supporting body. Each of the water tanks has an inlet for filling water therein to generate self-weight to secure the supporting body. These self-weighted tanks replace the foundation piles. This design is benefit to install the solar energy system on the ground or the roofs of buildings, because these areas are more spacious. However, the disadvantages encountered in the prior art are as below.

• • 1. The water tank is individual and independent. Although the top part of each water tank can be coupled to the supporting body, the water tanks failed to provide any connection or coupling. Thus, the rigid strength and leeway tolerance provided by this kind of water tanks may be insufficient to provide the safety as required.
  • 2. The water tank needs to be filled water one by one. It is inconvenient to connect to the pipe from the water supply system directly.
  • 3. The water in water tanks which is individual and independent is only used to provide the self-weight for the tank, no other use is provided.

BRIEF SUMMARY

The present invention is to provide a self-weighted water tank device for a solar energy system. Particularly, the present invention is to provide a water tank for a solar energy system, after which is filled with water, the self-weight of the water tank can be used to secure the solar energy system. The water tanks are closely engaged with each other to form a water tank module for enhancing the rigid strength and the stability for the solar energy system. Therefore, the structure of the water tank module disclosed in the present invention can overcome the disadvantages in prior art as mentioned above.

In one preferred embodiment, the self-weighted water tank device for a solar energy system of the present invention comprises:

• • a supporting body;
  • a solar panel installed on the supporting body upper part; and
  • a water tank module comprising a plurality of water tanks, wherein the water tank comprises a lower part and an outer wall with a plurality of the engaging parts formed thereon for engaging the water tanks with each other, wherein the outer wall is an upward extension of the lower part;
  • wherein the supporting body is coupled to the water tank module and the solar energy system is secured by the self-weight the of water tank generated by injected water into water tanks

The supporting body is constructed from a plurality of supporting frames; the outer wall of the water tank comprises a connecting part, the supporting body is coupled to the water tank module by the connecting part; the water tank upper part comprises an upper cover.

In another preferred embodiment, the self-weighted water tank device for a solar energy system of the present invention comprises:

• • a supporting body;
  • a solar panel installed on the upper part of a upper cover; and
  • a water tank module comprising a plurality of water tanks, wherein the water tank comprises a lower part positioned on ground, an outer wall with a plurality of the engaging parts formed thereon for engaging the water tanks with each other and an upper cover engaging with the upper part of the outer wall, wherein the outer wall is an upward extension of the lower part;
  • wherein the solar energy system is secured by the self-weight of the water tank generated from the water injected into water tanks

For both embodiments, the engaging parts are locking holes which are bolted with a connection part by bolts to couple the water tanks, and the engaging parts comprise a tenon part and a mortise part on the outer wall of the water tank, the tenon part and the mortise part can be joined to couple the water tanks

The present invention relates to a water tank module used in a solar energy system. The water tanks of the water tank module only need to be filled water once at a time to provide sufficient self-weight of the water content. Thus, the problem encountered by the conventional water tanks which need to be filled water one by one will be overcome.

A passage is constructed between the water tanks for communicating the water tanks with each other. The passage is at a certain highness above the lower part of the water tank. Thus, the water level of all the water tanks of the water tank module can be maintained at a same level in order to maintain the consistent stabilization provided by the self-weighted water tank device of the solar energy system.

The passage consisted of a tube and tube hole is configured at the opposite outer walls of the water tanks, and the passage is configured by a plurality of tube holes which are at corresponding position on the opposite outer walls of the water tanks and a tube disposed in the corresponding tube holes. A stopper which plugs the passages or tube holes may be further included.

An injection inlet and drainage outlet is formed on the outer wall of the water tanks and the injection inlet is at a certain height and the drainage outlet is at a height lower than the injection inlet. The injection inlet is connected to a water supply pipe of an automatic water supply, the drain outlet is connected to a drain pipe, and the stopper can be used to plug the injection inlet or the drain hole.

The present invention is directed to a solar energy system comprising a water tank module as a water supply system. That is the present invention provides a self-weighted water tank device to work as a water supply system so as to enhance the utilization of the water in the water tanks In prior art, the water in the water tanks is only for providing self-weight for the solar energy system.

A water-supplying outlet 39 is configured on the outer wall of the water tank at a height equal to or higher than the certain height of the passage and the water-supplying outlet is connected to a water-supplying tube to conduct the water in the water tank to flow to a demand side. The demand side can be a farm, ranch or fish farm adjacent to the supporting body, and the stopper can be used to plug the water-supplying outlet.

The advantages of the present invention are:

• • 1. The water tank module consisted of a plurality of water tanks closely engaged with each other is susceptible to be constructed on the ground area for the solar energy. The number of water tanks is variable as needed. The water tanks arranged to cover a certain area can provide a more standing security, such that the rigid strength and leeway tolerance of the system will be enhanced and thus, the stability of the solar energy system is enhanced.
  • 2. Optionally, one of the water tanks of the water tank module is connected to a water supply system for automatic supplying water to all the water tanks of the water tank module, so as to provide self weight of the tanks for securing the solar energy system.
  • 3. Optionally, the assembled water tank module can be used as a system for water supplying and drainage cycle. The present device is susceptible to be constructed at the roof of buildings or an area close to a farm, a ranch or a fish farm where needs electricity and water. The device can be used as a water-storage tank. Thus, the solar energy system has a further advantage.

BRIEF DESCRIPTION OF THE DRAWINGS

These and other features and advantages of the various embodiments disclosed herein will be better understood with respect to the following description and drawings, in which like numbers refer to like parts throughout, and in which:

FIG. 1 is a perspective view of the first embodiment of the present invention;

FIG. 2 is a cross-sectional view of the second embodiment of the present invention;

FIG. 3 a is an explosion view of one of water tank modules shown in FIG. 1 and FIG. 2;

FIG. 3 b is an explosion view of another one of water tank modules shown in FIG. 1 and FIG. 2;

FIG. 4 is a partly perspective view of the third embodiment of the present invention;

FIG. 4 a is an explosion view of the water tank module shown in FIG. 4;

FIG. 4 b is a cross-sectional view of the water tank module shown in FIG. 4a;

FIG. 5 is a front view of a part of a water tank module;

FIG. 5 a is an explosion view of one embodiment of the passage shown in FIG. 5;

FIG. 5 b is an explosion view of another one embodiment of the passage shown in FIG. 5;

FIG. 6 is an explosion view of one embodiment of the injection inlet and draining outlet shown in FIG. 5.

FIG. 7 is a front view of a part of the water tank module shown in FIG. 6;

FIG. 8 is a top view of a configuration of one embodiment of the present invention.

FIG. 9 is a cross-sectional view of a part of a configuration of another one embodiment of the present invention.

DETAILED DESCRIPTION

The present invention relates to a self-weighted water tank device for a solar energy system. Three embodiments and an additional embodiment which extend the application of the present invention are illustrated hereinafter together with the drawings.

Embodiment 1

Please refer to FIG. 1 together with FIG. 3. FIG. 1 shows a perspective view of a first embodiment of the present invention. FIGS. 3a and 3b respectively show the explosion views of different embodiments of the water tank module shown in FIG. 1. In general, the solar energy system comprises a supporting body 10 with one or more solar panels 20 as demanded thereon. The self-weighted water tank device particularly comprises a water tank module 3 constructed by a plurality of water tanks 30. Thus, the self-weighted water tank module 3 provides to secure the supporting body 10 and the one or more solar panels 20. The water tank module comprises a supporting body, one or more solar panels, and a water tank module comprising one or more water tanks

The supporting body 10 is constructed by a plurality of supporting frames 13 made of aluminum extrusion molds, angle steel, C-type steel or the likes to cover the area for the installation of the solar energy system. The supporting frames 13 are modularized and constructed by scarf joining, interlocking or welding the frame modules. The supporting body 10 comprises an upper part 11 and a lower part 12. The upper part 11 is in a form of an inclined plane. The inclined angle of the upper part is advantageous for the upper part toward the direction of sunlight. Optionally, the inclined angle of the upper part 11 is adjustable toward the direction of sunlight by an adjusting means. The lower part 12 comprises a plurality of mounting parts 12a. The upper part 11 and the lower part 12 are coupled together by the supporting frame 13.

The solar panel 20 can be a single panel or consists of a plurality of panels to absorb the sunny radiation and to transform the solar energy to electricity. The required number of solar panels 20 is built up on the top part 11 of the supporting body 10 for absorbing the solar radiation.

The water tank 30 can be made of plastics or metals or constructed of bricks and have a lower part 31 for placing on the ground 70. The lower part 31 extends upwardly to form the outer wall 32. The ground 70 can be the roof of buildings or an area close to a farm, a ranch or a fish farm where needs electricity and water. The outer wall 32 comprises the walls for constructing a cube shape or other shapes. The outer wall 32 comprises an engaging part 33. In addition, the water tank 30 comprises an upper cover 34.

The water tank module 3 consists of a plurality of water tanks 30 as demanded. Particularly, the water tank module 3 is constructed by engaging the engaging parts 33 of the water tank 30 within the area covered by the supporting body 10. Thus, the water tank module 3 can provide the sufficient secure to the all area of the solar energy system. The supporting body 10 is constructed on the water tank module 3 by mounting part 12a, such that after the water tank 30 is filled with water, the weight generated by the water in the tank is able to provide sufficient secure to the solar energy system.

Particularly, the engaging part 33 comprises a locking hole 33a as shown in FIG. 3a. The locking hole 33a is configured on the outer walls 32 of the water tanks 30 for coupling to another water tank. The locking holes 33 of the water tanks which are intended to be coupled each other are at the same sides of the outer walls. Thus, the adjacent water tanks are coupled together by bolting bolts through the connection part 33b into the locking holes 33a respectively on the adjacent water tanks for coupling them together. A plurality of water tanks can be coupled by this manner. The number of water tanks 30 is depends on demand to form the water tank module 3. In addition, the engaging parts 33 can be embodied in the form of a tenon part 33c and a mortise part 33d as shown in FIG. 3b. The tenon part 33c and a mortise part 33d are configured on the opposite out walls 32 of the water tank 30, respectively. The tenon part 33c and the mortise part 33d are substantially in the forms of a dovetailed tenon and a dovetailed groove for interlocking However, any form of male and female parts suitable for interlocking known by the skilled in the art can be used. Thus, without any bolting parts, a plurality of water tanks 30 are interlocked coupled together by tenon parts 33c and mortise parts 33d to form the water tank module 3.

A connecting part 35 is configured on the outer wall 32 of the water tank 30. Particularly, the connecting part 35 can be in a form of a locking hole 35a as shown in FIG. 3a or of a rabbet 35b as shown in FIG. 3b. The supporting body 10 is coupled to the water tanks 30 by bolting or interlocking the mounting part 12a to connecting part 35. Thus, the supporting body 10 can be fixed on the outer wall 32 of the water tank 30 and integrated to the water tank module 3. Accordingly, the self-weighted water tank device is integrated to the solar energy system.

Embodiment 2

Please refer to FIG. 2 together with FIG. 3a and FIG. 3b. FIG. 2 shows the cross-sectional view of the second embodiment of the present invention. The difference of this embodiment from the first embodiment resides in that the supporting body 100 is consisted of a supporting frame 130 to be constructed as a base 140 disposed on the ground 70. The lower part 31 of the water tanks 30 is on the base 140. A predetermined number of the water tanks are coupled together to construct a water tank module 3. After the water tanks of the water tank module are filled with water, the weight generated from the water tanks will be loaded on the base 140 such that the supporting body 100 and the water tank module 3 will be securely integrated together. For enhancing the secure integration between the supporting body 100 and the water tank module 3, a connecting part 350 can be optionally configured on the outer wall 32 of the water tank (which includes the form of a locking hole 35a shown in FIG. 3a or in a form of the rabbet 35b as shown in FIG. 3b.) A mounting part 120a is disposed at an appropriate place on the supporting body 100 to couple the supporting body 100 and the water tank module 3 by bolting or rabbeting join. The remaining parts not mentioned in this embodiment is the same as those described in Embodiment 1.

Embodiment 3

Please refer to FIG. 4, FIG. 4a and FIG. 4b. FIG. 4 shows the perspective explosion view of the third embodiment of the present invention. FIG. 4a and FIG. 4b respectively show the perspective explosion view and cross-sectional view of the water tank module shown in FIG. 4 In general, a solar energy system comprises one or more solar panels 200, as required, installed on the upper cover 340. The self-weighted water tank device especially comprises a plurality of water tanks 300 assembled to be a water tank module 3. The resulted water tank module 3 is used to secure the construction of the upper cover 340 and the solar panel 200. The water tank module comprises an upper cover 340, a solar panel and a water tank 330.

The upper cover 340 is made of plastics or metal molded in a shape for covering a single water tank 300. The upper cover 340 can be shaped as a closed upper part 110 with an inclined upper side 110. The inclined angle of the inclined upper side 110 is preferably to enable the upper side 110 toward to the direct sunlight. Alternatively, the upper part 110 is designed with a mechanism for adjusting inclined angle thereof. The lower part 120 of the upper cover can be casing, fastening or bolting to the upper part of the water tank 300 in order for the upper cover 340 to be integrated with each water tank 300.

A solar panel 200 or an assembly of a plurality thereof is installed on the upper part 110 of the upper cover 340 for absorbing the solar radiation.

A water tank 300 is the same as those shown in Embodiments 1 and 2, which is made of plastics and metal. The water tank 300 comprises a lower part 310 for installing on the ground 70. The lower part 310 extends upwardly to form the outer walls 320. The upper cover 340 is covered on the upper part of the outer wall 320 and is integrated with the water tank 300. The outer wall 320 comprises an engaging part 330.

The water tank module 3 is the same as that described in Embodiments 1 and 2, which is consisted of a plurality of water tanks 300 coupled with each other with the engaging parts 330 thereof. The amount of the water tanks is determined on demand and the self weight generated by the water tanks is sufficient to secure the solar energy system. The engaging part 330 can be in the form the same as the connection part 33b shown in FIG. 3a for securing the interlocking holes 33a on the two adjacent water tanks or in the form of the tenon part 33c and the mortise part 33d shown in FIG. 3b to couple the adjacent water tanks Accordingly, a predetermined number of the water tanks are coupled together to construct a water tank module 3 covered an area sufficient for the solar energy system. Thus, a solar energy system with a self-weighted water tank device is constructed.

According to the Embodiments 1 to 3, the upper covers 34, 340 can be opened for the water filling. When using, the upper covers can be opened one by one for water filling into the water tanks 30 in order for the water tank module 3 filled with sufficient water to generate a self weight sufficient to secure the whole solar energy system. In addition, because the water tank module 3 is integrally combined by the water tanks 30, 300, the supporting area provided by the water tank module of the present invention is increased. Thus, the rigid strength and leeway tolerance for the solar energy system is enhanced and further the stability of the solar energy system is also enhanced.

Additional Embodiment

The present invention is for improving the efficiency of the water filling for each water tank 30, 300. The present invention is to provide a method for filling all the water tanks of the water tank module with water once at a time to complete the water filling and generate the self weight for the system. Please refer to FIG. 5 which shows a front view of a part of water tank module shown in FIGS. 1, 2 and 4. FIG. 5a shows an explosion view of the embodiment of the present invention shown in FIG. 5. FIG. 5b shows an explosion view of another one embodiment of the present invention shown in FIG. 5. Especially, a passage 36 is provided between the water tanks 30, 300 coupled for forming the water tank module 3 of the present invention for communicating with each tanks (as shown in FIG. 5). The passage 36 is at a certain height, h1, above the lower part of the water tank 30, 300. Thus, the water tank module 3 can be filled with sufficient water by injecting the water into one water tank 30, 300. When the water level reach the height of the passage 36, the water will overflow through the passage 36 into the next water tank 30, 300 until all the water tanks of the water tank module 3 are filled with enough water and the water level thereof is maintained above the certain height, h1.

In addition, the passage 36 can be disposed in a form consisted of a tube 36a and a tube hole 36b respectively formed at the opposite outer wall 320 of the water tank 30, 300 (as shown in FIG. 5a). When coupling the water tanks 30, 300, the tube 36a and the tube hole 36b is joined to form the passage 36. Furthermore, the passage 36 can be in a form of a plurality of tube holes 36c formed on the opposite outer walls 320 of the water tanks 30, 300 (as shown in FIG. 5b) and a tube 36d is disposed between the tube holes 36c in order to form the passage 36. A stopper 36e for water stop is used to plug the passage 36 which is not used in water tank 30, 300 and especially, to plug the tube hole 36b or 36c.

Furthermore, please refer to FIGS. 6 to 8, for efficiently filling water to and draining water from the water tank module 3, a injection inlet 37 and drainage outlet 38 are formed on the outer wall 320 of the above-mentioned water tank 30, 300 (as shown in FIG. 6). The injection inlet 37 is at a certain height, h2 (as shown in FIG. 7) and the drainage outlet 38 is at a certain height, h3. The relation between the height h1, h2 and h3 is h2>h1>h3. The injection inlet 37 on any one of the water tank 30, 300 of the water tank module 3 can be connected to a water supply pipe 40 of an automatic water supply (as shown in FIG. 8) by opening the valve in the water supply in order to automatically supply the water needed by the water tank module 3. The drainage outlet 38 on any one of the water tank 30, 300 of the water tank module 3 can be connected to a water drainage pipe 50 of a water drainage line in order to drain the water in the water tank module 3 when it is necessary by opening the valve of the water drainage line. The injection inlet 37 and the drainage outlet 38 which are not connected to the pipes can be stopped by stopper 36e.

In addition, please refer to FIGS. 7 to 9. For not affecting the self-weight generated by the water tank module 3 and efficiently utilizing the water in the water tank module 3, a water-supplying outlet 39 is configured on the outer wall 320 of the water tank 30, 300. The water-supplying outlet 39 is positioned at a certain height, h4, (as shown in Fig.7). The relation between the height, h1, of the passage 36 and the height, h4, of the water-supplying outlet 39 is h4≧h1. Thus, the water-supplying outlet 39 is connected to a water-supplying tube 39a to conduct the water into the water tank module 3 to flow to a demand side 60. The demand side can be positioned in the area of the supporting body 10 (as shown in FIG. 8) or adjacent to the water tank module 3 (as shown in FIG. 9). The demand side can be such as a farm, ranch or fish farm. Thus, the water in the water tank module can be exited from the water tank module to provide water to the demand side. The water-supplying outlet 39 can be plugged by the stopper 36e when not using.

The advantages of the present invention are as below.

• • 1. The water tanks are modularized for easily assembly, modification and disassembly.
  • 2. The utilization of the water tanks in the solar panel supporting body provides both the water supply and the electricity supply from the solar energy system.
  • 3. The water in the water tank can be maintained at a certain level for securing the solar energy system and be used to supply water for the demand side.
  • 4. If it needs, a medicament can be added into the water of the water tank for the demand side's use.

The above description is given by way of example, and not limitation. Given the above disclosure, one skilled in the art could devise variations that are within the scope and spirit of the invention disclosed herein, including configurations ways of the recessed portions and materials and/or designs of the attaching structures. Further, the various features of the embodiments disclosed herein can be used alone, or in varying combinations with each other and are not intended to be limited to the specific combination described herein. Thus, the scope of the claims is not to be limited by the illustrated embodiments.

Claims

1. A self-weighted water tank device for a solar energy system comprising: a supporting body;a solar panel installed on the supporting body upper part; anda water tank module comprising a plurality of water tanks, wherein the water tank comprises a lower part and an outer wall with a plurality of the engaging parts formed thereon for engaging the water tanks with each other, wherein the outer wall is an upward extension of the lower part;wherein the supporting body is coupled to the water tank module and the solar energy system is secured by the self-weight of the water tank generated by injected water into water tanks

2. The device as claimed in claim 1, wherein the supporting body is constructed from a plurality of supporting frames.

3. The device as claimed in claim 1, wherein the engaging parts are locking holes which are bolted with a connection part by bolts to couple the water tanks

4. The device as claimed in claim 1, wherein the engaging parts comprise a tenon part and a mortise part on the outer wall of the water tank, the tenon part and the mortise part can be joined to couple the water tanks

5. The device as claimed in claim 1, wherein the water tank lower part is positioned on ground, the supporting body is constructed on the outer wall of the water tank and coupled with the water tank module.

6. The device as claimed in claim 1, wherein the supporting body is positioned on a base which is positioned on ground, the lower part of the water tank is positioned on the base to integrate the supporting body and the water tank module.

7. The device as claimed in claim 6, wherein the outer wall of the water tank comprises a connecting part, the supporting body is coupled to the water tank module by the connecting part.

8. The device as claimed in claim 1, wherein the water tank upper part comprises an upper cover.

9. The device as claimed in claim 1, wherein the water tanks communicates with each other by a passage in between, the passage is installed at a certain height above the lower part of the water tank.

10. The device as claimed in claim 9, wherein the passage consisted of a tube and tube hole is configured at the opposite outer walls of the water tanks

11. The device as claimed in claim 9, wherein the passage is configured by a plurality of tube holes which are at corresponding position on the opposite outer walls of the water tanks and a tube disposed in the corresponding tube holes.

12. The device as claimed in claim 9, further comprising a stopper which plugs the passages or tube holes.

13. The device as claimed in claim 9, wherein a injection inlet and drainage outlet are formed on the outer wall of the water tanks and the injection inlet is at a certain height and the drainage outlet is at a height lower than the injection inlet.

14. The device as claimed in claim 13, wherein the injection inlet is connected to a water supply pipe of an automatic water supply.

15. The device as claimed in claim 13, wherein the drain outlet is connected to a drain pipe.

16. The device as claimed in claim 13, further comprising a stopper to plug the injection inlet or the drain hole.

17. The device as claimed in claim 9, wherein a water-supplying outlet 39 is configured on the outer wall of the water tank at a height equal to or higher than the certain height of the passage and the water-supplying outlet is connected to a water-supplying tube to conduct the water in the water tank to flow to a demand side.

18. The device as claimed in claim 17, wherein the demand side can be a farm, ranch or fish farm adjacent to the supporting body.

19. The device as claimed in claim 17, further comprising a stopper to plug the water-supplying outlet.

20. A self-weighted water tank device for a solar energy system comprising: a supporting body;a solar panel installed on the upper part of a upper cover; anda water tank module comprising a plurality of water tanks, wherein the water tank comprises a lower part positioned on ground, an outer wall with a plurality of the engaging parts formed thereon for engaging the water tanks with each other and an upper cover engaging with the upper part of the outer wall, wherein the outer wall is an upward extension of the lower part;

21. The device as claimed in claim 20, wherein the engaging parts are locking holes which are bolted with a connection part by bolts to couple the water tanks.

22. The device as claimed in claim 20, wherein the engaging parts comprise a tenon part and a mortise part on the outer wall of the water tank, the tenon part and the mortise part can be joined to couple the water tanks.

23. The device as claimed in claim 20, wherein the water tanks communicates with each other by a passage in between, the passage is installed at a certain height above the lower part of the water tank.

24. The device as claimed in claim 23, wherein the passage consisted of a tube and tube hole is configured at the opposite outer walls of the water tanks

25. The device as claimed in claim 23, wherein the passage is configured by a plurality of tube holes which are at corresponding position on the opposite outer walls of the water tanks and a tube disposed in the corresponding tube holes.

26. The device as claimed in claim 23, further comprising a stopper which plugs the passages or tube holes.

27. The device as claimed in claim 23, wherein a injection inlet and drainage outlet are formed on the outer wall of the water tanks and the injection inlet is at a certain height and the drainage outlet is at a height lower than the injection inlet.

28. The device as claimed in claim 27, wherein the injection inlet is connected to a water supply pipe of an automatic water supply.

29. The device as claimed in claim 27, wherein the drain outlet is connected to a drain pipe.

30. The device as claimed in claim 27, further comprising a stopper to plug the injection inlet or the drain hole.

31. The device as claimed in claim 23, wherein a water-supplying outlet 39 is configured on the outer wall of the water tank at a height equal to or higher than the certain height of the passage and the water-supplying outlet is connected to a water-supplying tube to conduct the water in the water tank to flow to a demand side.

32. The device as claimed in claim 31, wherein the demand side can be a farm, ranch or fish farm adjacent to the supporting body.

33. The device as claimed in claim 31, further comprising a stopper to plug the water-supplying outlet.