Multi-filtration auto-drainage/irrigation pipe and planting device

1. A multi-filtration auto-drainage/irrigation pipe having both a drainage function and an irrigation function, comprising:

a pipe body component, wherein: said pipe body component comprises a pipe body and two vertical plates; said pipe body has an opening thereon; and, said two vertical plates are respectively extended from two ends of said opening towards an interior of said pipe body;

a trapezoidal groove component, wherein: said trapezoidal groove component has a bottom surface and two lateral slopes; and, said trapezoidal groove component is connected with said two vertical plates and an inner wall of said pipe body; and

a bottom plate, wherein: said bottom plate is connected with said two ends of said opening of said pipe body; and said bottom plate is opposite to said bottom surface of said trapezoidal groove component;

wherein:

said two vertical plates, said two lateral slopes of said trapezoidal groove component and said inner wall of said pipe body form two first drainage and irrigation channels, respectively;

said trapezoidal groove component and said inner wall of said pipe body form a second drainage and irrigation channel;

said two vertical plates, said bottom surface of said trapezoidal groove component and said bottom plate form a third drainage and irrigation channel;

first filtering holes are uniformly distributed on said bottom plate; and, said bottom plate forms a first drainage and irrigation port as a first filtering layer on a pipe wall of said pipe body;

second filtering holes are uniformly distributed on said bottom surface of said trapezoidal groove component; said bottom surface of said trapezoidal groove component forms a second drainage and irrigation port as a second filtering layer; and said second drainage and irrigation port is arranged between said third drainage and irrigation channel and said second drainage and irrigation channel;

third filtering holes are uniformly distributed on said lateral slopes of said trapezoidal groove component; said two lateral slopes of said trapezoidal groove component form third drainage and irrigation ports as third filtering layers; and said third drainage and irrigation ports are respectively arranged between said second drainage and irrigation channel and said first drainage and irrigation channels;

when draining, water flows successively through said first filtering layer, said second filtering layer, said third filtering layers and said first drainage and irrigation channels, and then is discharged; and

when irrigating, the water flows successively through said first drainage and irrigation channels, said third filtering layers, said second filtering layer and said first filtering layer, and then is discharged.

2. The multi-filtration auto-drainage/irrigation pipe, as recited in claim 1 , wherein:

said pipe body is circular; and said third drainage and irrigation channel has a square section;

said third drainage and irrigation channel is intercommunicated with said second drainage and irrigation channel through said second filtering holes on said second drainage and irrigation port;

said first drainage and irrigation channels are intercommunicated with said second drainage and irrigation channel through said third filtering holes on said third drainage and irrigation ports; and

said two vertical plates as two lateral surfaces of said third drainage and irrigation channel are both closed surfaces; said third drainage and irrigation channel is respectively separated from said first drainage and irrigation channels through said closed surfaces; and, said two lateral surfaces of said third drainage and irrigation channel extend to connect to said inner wall of said pipe body for forming two extension surfaces which are said two lateral slopes of said trapezoidal groove component and serve as said third drainage and irrigation ports.

3. The multi-filtration auto-drainage/irrigation pipe, as recited in claim 2 , wherein:

each end of said opening of said pipe body has an arc groove;

each top end of said two vertical plates arranged in said pipe body has an arc flange;

said inner wall of said pipe body has two arc flanges;

each side of said bottom plate has an arc flange;

each end of said bottom surface of said trapezoidal groove component has an arc groove;

each top end of said two lateral slopes of said trapezoidal groove component has an arc groove;

said bottom plate is plugged into said opening of said pipe body through said arc grooves and said arc flanges; and

said vertical plates arranged in said pipe body, said inner wall of said pipe body and said trapezoidal groove component are plugged together through said arc flanges and said arc grooves.

4. The multi-filtration auto-drainage/irrigation pipe, as recited in claim 2 , wherein a pore size of said first filtering holes is larger than a pore size of said second filtering holes; and said pore size of said second filtering holes is larger than a pore size of said third filtering holes.

5. The multi-filtration auto-drainage/irrigation pipe, as recited in claim 2 , wherein said first, said second and said third filtering holes are bar-shaped, triangular, circular or square.

6. The multi-filtration auto-drainage/irrigation pipe, as recited in claim 1 , wherein:

each end of said opening of said pipe body has an arc groove;

each top end of said two vertical plates arranged in said pipe body has an arc flange;

said inner wall of said pipe body has two arc flanges;

each side of said bottom plate has an arc flange;

each end of said bottom surface of said trapezoidal groove component has an arc groove;

each top end of said two lateral slopes of said trapezoidal groove component has an arc groove;

said bottom plate is plugged into said opening of said pipe body through said arc grooves and said arc flanges; and

said vertical plates arranged in said pipe body, said inner wall of said pipe body and said trapezoidal groove component are plugged together through said arc flanges and said arc grooves.

7. The multi-filtration auto-drainage/irrigation pipe, as recited in claim 1 , wherein a pore size of said first filtering holes is larger than a pore size of said second filtering holes; and said pore size of said second filtering holes is larger than a pore size of said third filtering holes.

8. The multi-filtration auto-drainage/irrigation pipe, as recited in claim 1 , wherein said first, said second and said third filtering holes are bar-shaped, triangular, circular or square.

9. The multi-filtration auto-drainage/irrigation pipe, as recited in claim 1 , wherein:

an upper part of the multi-filtration auto-drainage/irrigation pipe is arc-shaped;

a lower part of the multi-filtration auto-drainage/irrigation pipe is square; and

said bottom plate is arc-shaped or flat.

10. A planting device, comprising:

a planting container;

a water supplying pipe arranged in said planting container;

a floating water level indicator arranged in said water supplying pipe, wherein: said floating water level indicator is for indicating a height of a water level; a highest water level mark and a lowest water level mark are on said floating water level indicator, and a bottom end of said floating water level indicator is connected with a buoy which floats on water in said water supplying pipe; and

a multi-filtration auto-drainage/irrigation pipe vertically connected with said water supplying pipe, comprising a pipe body component, a trapezoidal groove component and a bottom plate, wherein:

said pipe body component comprises a pipe body and two vertical plates; said pipe body has an opening thereon; and, said two vertical plates are respectively extended from two ends of said opening towards an interior of said pipe body;

said trapezoidal groove component has a bottom surface and two lateral slopes; and, said trapezoidal groove component is connected with said two vertical plates and an inner wall of said pipe body;

said bottom plate is connected with said two ends of said opening of said pipe body; and said bottom plate is opposite to said bottom surface of said trapezoidal groove component;

said two vertical plates, said two lateral slopes of said trapezoidal groove component and said inner wall of said pipe body form two first drainage and irrigation channels, respectively;

said trapezoidal groove component and said inner wall of said pipe body form a second drainage and irrigation channel;

said two vertical plates, said bottom surface of said trapezoidal groove component and said bottom plate form a third drainage and irrigation channel;

first filtering holes are uniformly distributed on said bottom plate; and, said bottom plate forms a first drainage and irrigation port as a first filtering layer on a pipe wall of said pipe body;

second filtering holes are uniformly distributed on said bottom surface of said trapezoidal groove component; said bottom surface of said trapezoidal groove component forms a second drainage and irrigation port as a second filtering layer; and said second drainage and irrigation port is arranged between said third drainage and irrigation channel and said second drainage and irrigation channel;

third filtering holes are uniformly distributed on said lateral slopes of said trapezoidal groove component; said two lateral slopes of said trapezoidal groove component form third drainage and irrigation ports as third filtering layers; and said third drainage and irrigation ports are respectively arranged between said second drainage and irrigation channel and said first drainage and irrigation channels;

when draining, water flows successively through said first filtering layer, said second filtering layer, said third filtering layers and said first drainage and irrigation channels, and then is discharged; and

when irrigating, the water flows successively through said first drainage and irrigation channels, said third filtering layers, said second filtering layer and said first filtering layer, and then is discharged.

11. The planting device, as recited in claim 10 , wherein:

said water supplying pipe has a plurality of sections which are same and vertically plugged together; and, an amount of said sections of said water supplying pipe is adjustable for satisfying different heights of said planting container;

said multi-filtration auto-drainage/irrigation pipe is arranged on at least one section of said water supplying pipe;

on each section of said water supplying pipe, at most two multi-filtration auto-drainage/irrigation pipes are arranged;

a pipe joint for plugging is arranged between each multi-filtration auto-drainage/irrigation pipe and a coupling end of said water supplying pipe; and

said multi-filtration auto-drainage/irrigation pipe is able to be extended by connecting one more multi-filtration auto-drainage/irrigation pipe through a joint or an elbow.

12. The planting device, as recited in claim 11 , wherein:

said water supplying pipe further comprises a conjoined attached pipe which is intercommunicated with said water supplying pipe;

a straw device is arranged in said conjoined attached pipe; and

said straw device comprises a straw, wherein a top end of said straw is connected with a water pumping device or a negative pressure balloon.

13. The planting device, as recited in claim 10 , wherein:

said water supplying pipe further comprises a conjoined attached pipe which is intercommunicated with said water supplying pipe;

a straw device is arranged in said conjoined attached pipe; and

said straw device comprises a straw, wherein a top end of said straw is connected with a water pumping device or a negative pressure balloon.