CN2812559Y - Water control valve pipe, water control head and micro-irrigator - Google Patents
Water control valve pipe, water control head and micro-irrigator Download PDFInfo
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- CN2812559Y CN2812559Y CN 200520018975 CN200520018975U CN2812559Y CN 2812559 Y CN2812559 Y CN 2812559Y CN 200520018975 CN200520018975 CN 200520018975 CN 200520018975 U CN200520018975 U CN 200520018975U CN 2812559 Y CN2812559 Y CN 2812559Y
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Abstract
The utility model relates to a water control valve pipe, a water control head and a micro-irrigator, wherein the water control valve pipe comprises an outer shell and an inner core arranged in the outer shell, the outer shell is provided with a water inlet end and a water outlet end, the inner core is composed of a bundle of hydrophilic threads which extend at least from the water inlet end to the water outlet end, and average clearance among a plurality of hydrophilic threads in the inner core is lessened gradually along the direction of water flow. The water control head comprises a filter cavity body on which a water inlet and at least one water outlet are formed; the water inlet is provided with a filter membrane, and the water outlet is connected with at least one water control valve pipe. The micro-irrigator comprises a water storage container and the water control valve pipe which is connected to the water storage container and is communicated with the inner cavity of the water storage container, and a filter cavity body is formed between the water storage container and the water control valve pipe. The utility model can effectively extend the service life of the water control valve pipe, and enables automatic irrigation technique which consumes no energy to have real utility value.
Description
Technical field
The utility model relates to a kind of slight irrigation device, is a kind of water control valve pipe, control head and micro-irrigation device specifically.
Background technology
What current agricultural irrigation was economized on water the most is slight irrigation, and as drip irrigation and infiltrating irrigation, its water supply speed can be low to moderate per hour 3-5 premium on currency.But find that by a large amount of tests big day water requirement of a lot of plantlings be hundreds of milliliter even tens milliliters only, obviously drip irrigation and infiltrating irrigation also exist surprising waste.Its reason be to drip ooze head the water outlet aperture generally all more than the 1-0.5 millimeter, under the situation of this aperture, it is very limited that capillary is brought into play the effect of its controlled water flow, so, drip and ooze head to go out water speed still too fast.
In order to address this problem, the applicant designs a kind of quantitative water control valve pipe, and it comprises surrounding layer and be arranged at the interior inner core of surrounding layer that described inner core constitutes by playing capillary porous media or bundle of capillary tubes.By experimental results demonstrate, this aperture, porous control head water side, possesses certain control outlet capacity, promptly controlling capillary in the head can bear the normal pressure of certain limit or negative pressure and water be flowed out or water body flows backwards, have only behind its contact soil, the capillary force of soil just can be drawn the water in the control head.Therefore, the application prospect of the utility model in water-saving agriculture is irrigated is very vast, it has not only realized the full automatic water supply and the long-time zero energy consumption of irrigating at independent little water source, and, make independent little water source irrigate this new irrigation method and be able to low-cost extensive use for open-air water storage, carrying, construction and plantation provide condition very easily.On the other hand,, also can realize the automatic diffusion that water body ascends, be equivalent to the effect of micro pump fully, and be not have power consumption even under need not the situation of the energy.This also is that human society realizes not having the quantitative automatic irrigation of power consumption for the first time.
But above-mentioned utility model also has problems in practical application, after the aperture diminishes, water quality requirement is just uprised, and is that the more little this trend in aperture is obvious more.If water quality is bad, use micropore just to stop up easily for a long time.The applicant finds that the reason that micropore is resulted in blockage is two aspects: the one, and original molecule stops up in the water body, and after another was the long-time placement of water body, microbial reproduction caused in the water.In case big impurity is arranged by micropore, will be stuck on the micropore; Or because the effect of putting up a bridge, several big impurity are together stayed on the micropore, and as time passes, above more impurity can be deposited in gradually, it is littler that hole becomes, and the impurity that many scripts can pass through can not pass through, form " unnecessary obstruction ", discharge is fallen sharply.If be beforehand with degree of depth water treatment, mean that then this system normally moves the higher fund input of needs, can hinder this technology being extensive use of in agriculture and forestry.
The applicant finds in experiment, impurity in the water (comprising microorganism) particle size and different, vary, there are not size and the identical particle of shape, even close particle is arranged, the length and width height of particle self also has nothing in common with each other, its inclination angle along water (flow) direction in current also varies, so its projection in water (flow) direction is also inequality, if can utilize the big low-angle minor variations of grain shape, it is separately fixed on the bigger diverse location of mutual space length, and this space be enough to make water and wherein impurity pass through smoothly, so this structure just can (impurity level be certain under certain water yield, particle size distribution is certain) play anti-blocking effect, simultaneously, also can save the high investment of carrying out because of water quality treatment.
The utility model content
The purpose of this utility model is to provide a kind of water control valve pipe, control head and micro-irrigation device, can prevent or reduce impurity obstruction water control valve pipe, control head and micro-irrigation device in the water.
Found through experiments, the water control valve tubular construction that hydrophilic wire harness is become helps realizing the utility model target most.In the water control valve tubular construction that this hydrophilic wire harness becomes, the hydrophilic thread trend is consistent with the current trend, and the space between the hydrophilic thread forms hole, and the hole of its water inlet is bigger, so that most of impurity enters the water control valve pipe smoothly; The water side hole should be minimum, to guarantee the control outlet capacity of water control valve pipe.Mean gap between the hydrophilic thread in the water control valve pipe diminishes gradually along water (flow) direction, promptly the distance between adjacent two hydrophilic threads all is to be water inlet to the diminishing trend in water side arbitrarily, such as, hydrophilic wire harness can be become conical structure, shape is in an angle each other to make wherein any adjacent two hydrophilic threads, when enough hour of angle, apart from minor variations, will produce very big displacement at current direction at the adjacent hydrophilic thread of current tangential direction.As: when angle is 1 when spending, change to apart from 8UM from hydrophilic wire spacing 10UM, the middle long space of 115UM of can having an appointment, and the space that forms between this space and laterally adjacent other hydrophilic thread communicates, this space are enough to by current and some more small impurities to horizontal other space.That is to say two hydrophilic wire spacings be 10UM and the distance for being blocked by impurity respectively at the 8UM place, also and do not mean that herein the pore that forms is blocked, the space that current and impurity wherein can be walked around 115UM between this two stuck point flows to the space that adjacent hydrophilic thread forms, and continues to move ahead.So originally, in one plane the impurity of being blocked is just staggered according to angle in its size, the water is fixed on different cross section, and less impurity also can flow through between its space of staggering smoothly, can not form " unnecessary obstruction ".In addition, even some bundle hydrophilic threads are parallel putting together arbitrarily, wherein also have some hydrophilic threads and form the phenomenon that diminishes gradually to the other end by an end naturally, if current also move along this direction, these hydrophilic threads also can play the fixedly effect of impurity of staggering, and just overall degree can be weak.
Based on above-mentioned principle, the utility model can adopt following technical scheme to realize the purpose of this utility model.
A kind of water control valve pipe, comprise shell and through the inner core of shell, described shell is provided with water inlet and water side, described inner core is made of a branch of hydrophilic thread, hydrophilic thread extends to the water side by water inlet at least, and the mean gap to the small part inner core between the hydrophilic thread diminishes gradually along water (flow) direction.
The bore of each cross section is linearity by water inlet gradually to the water side and diminishes on the shell, and the mean gap between the hydrophilic thread in the shell diminishes gradually along water (flow) direction.
The shell of water control valve pipe can be pyramidal structure in the utility model, is preferably conical structure; The bevel angle of described conical shell is to 30 degree greater than 0 degree.The shell of water control valve pipe also can be helical structure; Regardless of the structure of shell, as long as the bore of each cross section is linearity by water inlet gradually to the water side and diminishes on the described shell.The variation of angle exerts an influence to going out water speed, and under the constant situation of other condition, angle is more for a short time, and to go out water speed slow more.
In the utility model, distance between described any two adjacent hydrophilic threads is reduced to the water side gradually by water inlet, and its distance reaches minimum during to the water outlet end, and the hole of formation also is the water control hole crack, it has determined the control outlet capacity of this water control valve pipe, and is the key factor that determines the water yield.To locate the maximum diameter of hole scope in the water control hole crack that each bar hydrophilic thread forms be the 1-50 micron in this water side in the utility model.
Hydrophilic thread described in the utility model may extend into outside the water side, this its extend to hydrophilic thread outside the water control valve pipe water side, because its hydrophily, water in the water control valve pipe can be held its surperficial assisting, when its with after soil contacts, because soil also is hydrophilic substance, water will spread out in soil, reaches the purpose of water supply.
The utility model also provides a kind of control head, include the filtration cavity, filter cavity and be provided with water inlet and at least one delivery port, described water inlet is provided with filter membrane, be connected with at least one water control valve pipe on the described delivery port, described water control valve pipe comprises shell and through the inner core of shell, described shell is provided with water inlet and water side, described inner core is made of a branch of hydrophilic thread, hydrophilic thread extends to the water side by water inlet at least, and the mean gap to the small part inner core between the hydrophilic thread diminishes gradually along water (flow) direction.
Be connected with two or two above water control valve pipes on the described delivery port.
The filtering accuracy numerical value of described filter membrane is less than water control valve management and control water voids, the just maximum pore of water side.
Described filter membrane can be provided with multilayer.
The utility model also provides a kind of micro-irrigation device, include water container and know the water control valve pipe that is connected in water container and is communicated with the inner chamber of water container, described water control valve pipe comprises shell and through the inner core of shell, described shell is provided with water inlet and water side, described inner core is made of a branch of hydrophilic thread, hydrophilic thread extends to the water side by water inlet at least, and the mean gap to the small part inner core between the hydrophilic thread diminishes gradually along water (flow) direction.
Between described water container and water control valve pipe, also can be provided with the filtration cavity, filter cavity and be provided with water inlet and delivery port, described water inlet is communicated with water container, and inlet end is provided with filter membrane, and described delivery port is communicated with the water control valve pipe.
According to such scheme, effect of the present utility model is significant, has following beneficial technical effects:
1. water control valve pipe of the present utility model can increase substantially the ability of holding impurity, longer service life under identical water quality.
2. in this structure of control head; capillary in the water control valve pipe has been subjected to further protection; can stop up most impurity capillaceous and all shared, thereby can prolong several times and even tens of times again than independent use water control valve pipe the service life that makes whole control head by the bigger filter membrane in discharge area.
3. micro-irrigation device of the present utility model can become the little water source of independence irrigation rig truly, as long as will fill up water in the micro-irrigation device, need not labor management and just can guarantee that the water control valve pipe discharges moisture automatically and can not stopped up by the impurity in the water in the time in tens days and even hundreds of sky, really not solve the water supply problem of plant in the afforestation of desert.
Description of drawings
The structural representation of Fig. 1 the utility model water control valve pipe;
Fig. 2 the utility model water control valve pipe water side part enlarged diagram;
The structural representation of hydrophilic thread in Fig. 3 the utility model water control valve pipe;
Another structural representation of hydrophilic thread in Fig. 4 the utility model water control valve pipe;
A structural representation again of hydrophilic thread in Fig. 5 the utility model water control valve pipe.
Another structural representation of Fig. 6 the utility model water control valve pipe;
The structural representation of Fig. 7 the utility model control head;
Another structural representation of Fig. 8 the utility model control head;
A structural representation again of Fig. 9 the utility model control head;
The structural representation of Figure 10 the utility model micro-irrigation device;
Another structural representation of Figure 11 the utility model micro-irrigation device;
A structural representation again of Figure 12 the utility model micro-irrigation device.
Embodiment
As shown in Figure 1, 2, the utility model provides a kind of water control valve pipe 1, comprise shell 12 and the inner core 11 that is arranged in the shell 12, described shell 12 is provided with water inlet 121 and water side 122, described inner core 11 is made of a branch of hydrophilic thread, hydrophilic thread extends to water side 122 by water inlet 121 at least, and the mean gap to the small part inner core 11 between the hydrophilic thread diminishes gradually along water (flow) direction.
Water control valve pipe of the present utility model can be connected in water container and constitute micro-irrigation device.So, only need will be placed into the soil with the micro-irrigation device of water control valve pipe, just can evenly send water to root system of plant and needn't lay water supply line, regularly replace water container then or regularly replenish moisture content to water container to get final product.
And the bore of each cross section is linearity by water inlet 121 gradually to water side 122 and diminishes on the shell 12, so that the mean gap between the hydrophilic thread in the shell 12 diminishes gradually along water (flow) direction.
In the utility model, because the bore of each cross section is linearity by water inlet 121 gradually to water side 122 and diminishes on the described shell 12, and described inner core 11 is made of a branch of hydrophilic thread, therefore, distance in the water control valve pipe between any adjacent two hydrophilic threads all is to be water inlet 121 to water side 122 diminishing trend, shape in an angle each other, when enough hour of angle, spending to 30 degree scopes (present embodiment can be chosen in about 1 degree) as angle greater than 0, apart from minor variations, will produce very big displacement at the adjacent hydrophilic thread of current tangential direction at current direction.Like this, when the water that contains impurity flow through this water control valve pipe, in one plane the impurity of originally may being blocked was just according to its size and its angle and being staggered in water, and was fixed on different cross section, less impurity also can flow through between its space of staggering smoothly, can not form " unnecessary obstruction ".
Further, as shown in Figure 1, the shell 12 of water control valve pipe 1 can be pyramidal structure in the utility model, is preferably conical structure; As another kind of embodiment of the present utility model, shell 12 also can be helical structure etc.; Regardless of the structure of shell 12,, the situation that the cross section bore diminishes suddenly promptly do not occur and get final product as long as the bore of each cross section is linearity by water inlet 121 gradually to water side 122 and diminishes on the described shell 12.
Be that example describes with a branch of hydrophilic thread that in coniform shell, is provided with below.
As shown in Figure 3, on behalf of hydrophilic thread a-g, A-G represent impurity among the figure.
Current leniently hold (water inlet) to flow to narrow end (water side).
Impurity a is stuck between hydrophilic thread C, D, the G at first.
Impurity b is stuck between hydrophilic thread A, B, the C.
Impurity f is stuck between two hydrophilic thread D, the E, and its instability also might move down under certain condition; Also might fix, other impurity is progressively piled up on it, produces to put up a bridge.
Impurity d is stopped by impurity b from flowing between hydrophilic thread A, B, the C, impurity d then following current from flowing between hydrophilic thread B, C, the G between hydrophilic thread B, the C, because the variation of current is again between the hydrophilic thread A, the B that flow into the below of impurity b between hydrophilic thread B, the C, the C, and be stuck in the position of impurity b below.
Impurity e is from flowing between hydrophilic thread D, the F and being stuck between hydrophilic thread D, E, the F.
Impurity c is from flowing between hydrophilic thread D, E, the G between hydrophilic thread D, the E, and f stops by impurity, again by flowing between hydrophilic thread B, C, the G between hydrophilic thread C, the G and being stuck.
Impurity g is attached on the hydrophilic thread A, along with other impurity produces bridging on impurity g, might stop up gradually between the ABC at the locational passage of g point, but also have living space between itself and the impurity b.
If these seven impurity shops are long-pending in one plane as can be seen, just might be with its below path blockade.And in this anti-blocking structure, they because of self distinctive size and shape by automatic, three-dimensional scattering, making has a lot of spaces each other, water and all can freely pass through than small impurities.With impurity c place is example, and current flow through to come and can not be blocked by it from it, can have between hydrophilic thread B, the C on its next door, between hydrophilic thread C, the G, all can pass through between hydrophilic thread B, the G.
In the utility model, distance between described any two adjacent hydrophilic threads is reduced to water side 22 gradually by water inlet 21, and its distance reaches minimum during to water outlet end 22, and the hole of formation also is a water control hole, it has determined the control outlet capacity of this water control valve pipe, and is the key factor that determines the water yield.In the utility model, the maximum diameter of hole scope of the hole that each bar hydrophilic thread of these 22 places, water side forms is the 1-50 micron, and the maximum diameter of hole scope of the hole that each bar hydrophilic thread of 22 places, described water side forms is preferably the 5-30 micron.Like this, the moisture content that this water control valve pipe not only can provide plant to draw also can more effectively reduce the influence of pressure variation to discharge.
The mensuration of maximum diameter of hole can be with reference to national standard in the utility model.With hydrophilic wire harness is that the maximum diameter of hole of the water control valve pipe of inner core equals the maximum pore that this hydrophilic wire harness forms between each bar hydrophilic thread of water side; And this water control valve pipe is when releasing water in soil, and other smaller aperture due is also brought into play certain effect.
Further, hydrophilic thread described in the utility model may extend into 122 outsides, water side, and the water in the water control valve pipe can be spread out on its surface because its hydrophily, when its with after soil contacts, water will spread out in soil, reaches better water supply purpose.
Principle and the structure of present embodiment and embodiment 1 are basic identical, its difference is as shown in Figure 6, the shell 12 of water control valve pipe 1 can be cylindrical structural, hydrophilic thread extends (not shown) outside the water inlet 121, and the mean gap between the hydrophilic thread outside described this water inlet 121 diminishes gradually along water (flow) direction.In the present embodiment, owing to extend hydrophilic thread outside the water inlet 121, diminish gradually, therefore, can reach the effect identical equally as embodiment when current are out-of-date along the mean gap of water (flow) direction.
As shown in Figure 7, the utility model also provides a kind of control head, include and filter cavity 2, filter cavity 2 and be provided with water inlet 21 and at least one delivery port 22, the bore of water inlet 21 is greater than the bore of delivery port 22, described water inlet 21 is provided with filter element 23, be connected with at least one aforesaid water control valve pipe 1 on the described delivery port 22, described water control valve pipe 1 comprises shell 12 and through the inner core 11 of shell 12, described shell 12 is provided with water inlet 121 and water side 122, described inner core 11 is made of a branch of hydrophilic thread, hydrophilic thread extends to water side 122 by water inlet 121 at least, and the mean gap to the small part inner core 11 between the hydrophilic thread diminishes gradually along water (flow) direction.
In actual applications, in order to prevent the former of water quality thereby to make water control valve pipe 1 blocked, therefore,, a filter is set again, so that reach the purpose of this utility model better at the front end of water control valve pipe 1.
Further, as shown in Figure 8, the delivery port 22 of described filtration cavity 2 is that two or two are with (being provided with three), to connect a plurality of water control valve pipes 1 among the figure.
As the another kind of embodiment of present embodiment, as shown in Figure 9, also be connected with water pipe 3 between the delivery port 22 of filtration cavity 2 and the water control valve pipe 1; Be connected with two or two above water control valve pipes 1 on the described water pipe 3.
In the present embodiment, as shown in the figure, described filter element 23 is a filter membrane; And described filter membrane can be provided with multilayer, to improve filter effect.
In the utility model, the filtering accuracy numerical value of described filter membrane can be less than the water control hole crack of mean gap between the hydrophilic thread of water control valve pipe 1 water side 122 or water control valve pipe water side.According to the common idea of people: the filtration hole of filter membrane is too little to be difficult to make water to pass through; Especially the filter membrane hole is less than the maximum diameter of hole of water control valve pipe, the capillary force of filter membrane will be greater than the capillary force of water control valve pipe so, therefore the water control valve pipe also just can't be attracted to delivery port by water inlet by filter membrane with water automatically, also just can't realize by the capillary force automatic irrigation.But, in the present embodiment, filtering accuracy numerical value is meant the maximum contaminant size that filter membrane can pass through, and just can be implemented in the more macroporous filter membrane by filtering the less filtering accuracy numerical value of acquisition layer by layer by depth-type filtration, as filtering materials such as felts, it filters hole and is far longer than its filtering accuracy numerical value; Promptly use the surface filtration membrane material, the filter membrane hole is less than the water control hole crack of water control valve pipe, because filter membrane is to be fully immersed in the water, the surface tension that does not have gas-liquid interface to form on it, just there is not capillary force yet, though therefore hole is very little, as long as the pressure difference of filter membrane both sides, water will flow.The hydrophilic thread of water control valve pipe 1 water side 122 extends outside this water side 122 and in soil and contacts, because the water sorption of soil and hydrophilic thread, make the pressure of the pressure of filter membrane water outlet side, therefore, also can make water more easily flow through filter membrane less than its influent side.Moreover water control valve pipe water yield is seldom, though therefore the filter membrane area is very little, water amount is very low, can satisfy the needs of water control valve pipe also.Find that through experiment the water control valve pipe cooperates with the best hole of filter membrane and is: water control valve pore crack is between 5 microns-30 microns; The hole of filter membrane between 0.1 micron-5 microns or filtering accuracy below 5 microns.
Shown in Figure 10,11, a kind of micro-irrigation device, the aforementioned water control valve pipe 1 that includes water container 4 and be connected in water container 4 and be communicated with the inner chamber of water container 4, described water control valve pipe 1 comprises shell 12 and through the inner core 11 of shell 12, described shell 12 is provided with water inlet 121 and water side 122, described inner core 11 is made of a branch of hydrophilic thread, hydrophilic thread extends to water side 122 by water inlet 121 at least, and the mean gap to the small part inner core 11 between the hydrophilic thread diminishes gradually along water (flow) direction.
In the present embodiment, as shown in figure 10, be the operating position of a water container 4 and a conical water control valve pipe jointing; Figure 11 then is the situation that a water container 4 and a cylindrical water control valve pipe jointing use.
As shown in the figure, also be provided with water filling port 41 on the described micro-irrigation device, after the water filling water filling port 41 sealed.This micro-irrigation device can be embedded in plant roots and carry out infiltrating irrigation.Owing to adopt aforesaid water control valve pipe 1 in this micro-irrigation device, therefore can prevent that water control valve pipe 1 from use stopping up.
Further, as shown in figure 12, between described water container 4 and water control valve pipe 1, also can be provided with aforesaid filtration cavity 2,, filter cavity 2 and be provided with water inlet 21 and delivery port 22 to improve its filter effect, the bore of water inlet 21 is greater than the bore of delivery port 22, described water inlet 21 is communicated with water container 4, and water inlet 21 ends are provided with filter element 23, and described delivery port 22 is communicated with water control valve pipe 1.
Other effect of present embodiment is identical with embodiment 1, does not repeat them here.
Claims (9)
1, a kind of water control valve pipe, comprise shell and through the inner core of shell, it is characterized in that, described shell is provided with water inlet and water side, the bore of each cross section is diminished to the water side gradually by water inlet on the shell, described inner core is made of a branch of hydrophilic thread, and hydrophilic thread extends to the water side by water inlet at least, and the mean gap to the small part inner core between the hydrophilic thread diminishes gradually along water (flow) direction.
2, water control valve pipe as claimed in claim 1 is characterized in that, the maximum diameter of hole scope that the water control hole crack of each bar hydrophilic thread formation is located in this water side is the 1-100 micron.
3, a kind of control head, it is characterized in that, include the filtration cavity, filter cavity and be provided with water inlet and at least one delivery port, described water inlet is provided with filter membrane, be connected with at least one water control valve pipe on the described delivery port, described water control valve pipe comprises shell and through the inner core of shell, described shell is provided with water inlet and water side, the bore of each cross section is diminished to the water side gradually by water inlet on the shell, described inner core is made of a branch of hydrophilic thread, and hydrophilic thread extends to the water side by water inlet at least, and the mean gap to the small part inner core between the hydrophilic thread diminishes gradually along water (flow) direction.
4, control head as claimed in claim 3 is characterized in that, the filtering accuracy numerical value of described filter membrane is less than maximum water control hole crack, water control valve pipe water side numerical value.
5, control head as claimed in claim 3 is characterized in that, the maximum diameter of hole scope of locating the water control hole crack that each bar hydrophilic thread forms when the water side is during at the 1-50 micron, and the hole of filter membrane is between 0.1 micron-5 microns.
6, a kind of micro-irrigation device, the water control valve pipe that includes water container and be connected in water container and be communicated with the inner chamber of water container, described water control valve pipe comprises shell and through the inner core of shell, it is characterized in that: described shell is provided with water inlet and water side, the bore of each cross section is diminished to the water side gradually by water inlet on the shell, described inner core is made of a branch of hydrophilic thread, hydrophilic thread extends to the water side by water inlet at least, and the mean gap to the small part inner core between the hydrophilic thread diminishes gradually along water (flow) direction.
7, micro-irrigation device as claimed in claim 6, it is characterized in that, between described water container and water control valve pipe, also can be provided with the filtration cavity, filter cavity and be provided with water inlet and delivery port, described water inlet is communicated with water container, and inlet end is provided with filter membrane, and described delivery port is communicated with the water control valve pipe.
8, micro-irrigation device as claimed in claim 7 is characterized in that, the filtering accuracy numerical value of described filter membrane is less than maximum water control hole crack, water control valve pipe water side numerical value.
9, micro-irrigation device as claimed in claim 7 is characterized in that, the maximum diameter of hole scope of locating the water control hole crack that each bar hydrophilic thread forms when the water side is during at the 1-50 micron, and the hole of filter membrane is between 0.1 micron-5 microns.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520018975 CN2812559Y (en) | 2005-05-18 | 2005-05-18 | Water control valve pipe, water control head and micro-irrigator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520018975 CN2812559Y (en) | 2005-05-18 | 2005-05-18 | Water control valve pipe, water control head and micro-irrigator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2812559Y true CN2812559Y (en) | 2006-09-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520018975 Expired - Fee Related CN2812559Y (en) | 2005-05-18 | 2005-05-18 | Water control valve pipe, water control head and micro-irrigator |
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| CN (1) | CN2812559Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106212221A (en) * | 2016-07-27 | 2016-12-14 | 栾清杨 | A kind of method for utilizing micro-irrigation of culturing-trees |
-
2005
- 2005-05-18 CN CN 200520018975 patent/CN2812559Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106212221A (en) * | 2016-07-27 | 2016-12-14 | 栾清杨 | A kind of method for utilizing micro-irrigation of culturing-trees |
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