CN104259022A - Hilly-slope irrigation system branch pipe pressure regulating device - Google Patents

Hilly-slope irrigation system branch pipe pressure regulating device Download PDF

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Publication number
CN104259022A
CN104259022A CN201410413726.8A CN201410413726A CN104259022A CN 104259022 A CN104259022 A CN 104259022A CN 201410413726 A CN201410413726 A CN 201410413726A CN 104259022 A CN104259022 A CN 104259022A
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CN
China
Prior art keywords
nominal diameter
elbow
reducer union
irrigation system
elbows
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Pending
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CN201410413726.8A
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Chinese (zh)
Inventor
黄凯
闫九球
潘伟
郭晋川
李桂新
何令祖
吴卫熊
邵金华
阮清波
黄荣华
姚瑶
谢文海
刘宗强
苏冬源
杨丽
李文斌
林学佳
李贤明
梁钧威
罗健
孙冰冰
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GUANGXI HYDRAULIC RESEARCH INSTITUTE
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GUANGXI HYDRAULIC RESEARCH INSTITUTE
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Application filed by GUANGXI HYDRAULIC RESEARCH INSTITUTE filed Critical GUANGXI HYDRAULIC RESEARCH INSTITUTE
Priority to CN201410413726.8A priority Critical patent/CN104259022A/en
Publication of CN104259022A publication Critical patent/CN104259022A/en
Pending legal-status Critical Current

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    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
    • A01G25/00—Watering gardens, fields, sports grounds or the like
    • A01G25/02—Watering arrangements located above the soil which make use of perforated pipe-lines or pipe-lines with dispensing fittings, e.g. for drip irrigation

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  • Life Sciences & Earth Sciences (AREA)
  • Soil Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Water Supply & Treatment (AREA)
  • Environmental Sciences (AREA)
  • Pipe Accessories (AREA)

Abstract

The invention discloses a hilly-slope irrigation system branch pipe pressure regulating device. The middle of a device body is provided with two parallel straight pipes; the left and right ends are symmetrical about the straight pipes; the left ends of the straight pipes are connected to elbows respectively, the two elbows are connected to connecting ports of two ends of an isometric tee joint, a connecting port of the middle of the isometric tee joint is connected to a variable-diameter joint, and the variable-diameter joint is connected to an inserting joint. According to the conventional inserting pipe mounting method, the device can be inserted into a hilly-slope irrigation system branch pipe directly. The device is mounted in the proper position of the branch pipe, the branch pipe pressure head can be lowered effectively, and the requirements on hilly-slope irrigation system branch pipe pressure regulation can be met completely; in addition, the device is composed of pipelines and parts completely and can be buried in the ground directly, assembled by own and produced in large scale through die manufacture, the device has the advantages of convenience in construction and low cost, and the maintaining and managing cost is not increased as that of a conventional pipeline.

Description

A kind of hilly upland drip irrigation system arm pressure-regulating device
Technical field
The present invention relates to irrigation and water conservancy and tubing manufactures crossing domain, be specifically related to a kind of hilly upland drip irrigation system arm pressure-regulating device.
Background technology
Drip irrigation is the irrigation system directly water or liquid manure mixed liquor being transported to evenly, accurately crop root by water dropper.Uniformity of irrigation water appilcation is the important indicator weighing drip irrigation system quality, and uniformity of irrigation water appilcation is determined by the arm of drip irrigation system and the pressure distribution of hollow billet.The regulation and control of hilly upland drip irrigation system uniformity of irrigation water appilcation are difficulties always.
At present, the regulation and control of hilly upland drip irrigation system uniformity of irrigation water appilcation are general adopts two kinds of ways: one is hollow billet pressure regulation, namely hollow billet adopts pressure compensated drip pipe, the unbalanced impact on uniformity of irrigation water appilcation of pressure is eliminated by the pressure compensator of hollow billet water dropper, but pressure compensated drip pipe mostly need from external import at present, cost is higher, as: Nai Tefeimu PC16250 pressure compensation drip irrigation pipe price about 2.10 yuan/m, and domestic equivalent specifications non-pressure compensates the 0.60 yuan/m in drip irrigation zone, the price more than 3 times constrains the use of pressure-compensation drip tape; Two is arm pressure regulation, and namely hollow billet adopts non-pressure to compensate drip irrigation pipe, is laid by hollow billet along contour, the vertical contour direction of arm is laid along slope, and on arm, pressure regulator valve is installed, by arm pressure regulator valve by arm Stress control within the specific limits, eliminate the unbalanced impact on uniformity of irrigation water appilcation of pressure, but the arm of drip irrigation system generally adopts buried at present, buried depth is at 0.8-1.0m, and pressure regulator valve must be installed with going out, and increases difficulty of construction, cost is also higher, and it is also higher that cost is managed and protected in maintenance.
Therefore, current can regulate and control hilly upland drip irrigation system uniformity of irrigation water appilcation in the urgent need to one and easy construction, cheap, maintenance manage and protect easy pressure-regulating device.
Summary of the invention
The object of the invention is to, for the problems referred to above, a kind of hilly upland drip irrigation system arm pressure-regulating device is provided, this device overcomes existing arm adjusting pressure measure increase difficulty of construction, cost is higher and the more high deficiency of cost is managed and protected in maintenance, and voltage regulation result meets the requirement of hilly upland drip irrigation system uniformity of irrigation water appilcation completely.
The technical scheme that the present invention is adopted for achieving the above object is:
A kind of hilly upland drip irrigation system arm pressure-regulating device, the local head loss that the ingenious utilization of this device causes by changing pipeline hydraulic condition, drip irrigation system arm pressure head is controlled within the specific limits, guarantee that arm pressure uniform distributes, realize the pressure controlled object of hilly upland drip irrigation system arm.Be two straight tubes be arranged in parallel in the middle part of this device, the relatively described straight tube in its two ends, left and right is symmetrical, the left end of this two straight tube connects an elbow respectively, described two elbows are connected with the connector at the two ends of same equal tee, the middle part connector of this equal tee is connected with a reducer union, and this reducer union is connected with bell and spigot joint.This device according to the installation method of general socket fitting, directly can access in the arm of hilly upland drip irrigation system.
The length of described straight tube is 0.5m-1.0m.
Described model mainly contains eight kinds of standard models:
The first model, the nominal diameter of this bell and spigot joint is 160mm, one end nominal diameter of this reducer union is 160mm, the other end nominal diameter of this reducer union is 110mm, the nominal diameter of this equal tee is 110mm, this elbow is 90 ° of elbows, and the nominal diameter of this elbow is 110mm, and the nominal diameter of this straight tube is 110mm.
The second model, the nominal diameter of this bell and spigot joint is 160mm, one end nominal diameter of this reducer union is 160mm, the other end nominal diameter of this reducer union is 90mm, the nominal diameter of this equal tee is 90mm, this elbow is 90 ° of elbows, and the nominal diameter of this elbow is 90mm, and the nominal diameter of this straight tube is 90mm.
The third model, the nominal diameter of this bell and spigot joint is 110mm, one end nominal diameter of this reducer union is 110mm, the other end nominal diameter of this reducer union is 75mm, the nominal diameter of this equal tee is 75mm, this elbow is 90 ° of elbows, and the nominal diameter of this elbow is 75mm, and the nominal diameter of this straight tube is 75mm.
4th kind of model, the nominal diameter of this bell and spigot joint is 110mm, one end nominal diameter of this reducer union is 110mm, the other end nominal diameter of this reducer union is 63mm, the nominal diameter of this equal tee is 63mm, this elbow is 90 ° of elbows, and the nominal diameter of this elbow is 63mm, and the nominal diameter of this straight tube is 63mm.
5th kind of model, the nominal diameter of this bell and spigot joint is 90mm, one end nominal diameter of this reducer union is 90mm, the other end nominal diameter of this reducer union is 63mm, the nominal diameter of this equal tee is 63mm, this elbow is 90 ° of elbows, and the nominal diameter of this elbow is 63mm, and the nominal diameter of this straight tube is 63mm.
6th kind of model, the nominal diameter of this bell and spigot joint is 90mm, one end nominal diameter of this reducer union is 90mm, the other end nominal diameter of this reducer union is 50mm, the nominal diameter of this equal tee is 50mm, this elbow is 90 ° of elbows, and the nominal diameter of this elbow is 50mm, and the nominal diameter of this straight tube is 50mm.
7th kind of model, the nominal diameter of this bell and spigot joint is 63mm, one end nominal diameter of this reducer union is 63mm, the other end nominal diameter of this reducer union is 40mm, the nominal diameter of this equal tee is 40mm, this elbow is 90 ° of elbows, and the nominal diameter of this elbow is 40mm, and the nominal diameter of this straight tube is 40mm.
8th kind of model, the nominal diameter of this bell and spigot joint is 63mm, one end nominal diameter of this reducer union is 63mm, the other end nominal diameter of this reducer union is 32mm, the nominal diameter of this equal tee is 32mm, this elbow is 90 ° of elbows, and the nominal diameter of this elbow is 32mm, and the nominal diameter of this straight tube is 32mm.
Described straight tube, elbow, equal tee, reducer union and bell and spigot joint are made by U-PVC or PE material.
The course of work of the present invention and operation principle as follows:
Drip irrigation system branch diameter is d 0, overcurrent flow is Q 0, flow velocity is V 0, wherein
First, current enter this device by after reducer union, and caliber becomes d 1, flow velocity becomes V 1, then V 1 = V 0 * ( d 0 d 1 ) 2 , The loss of flood peak that reducing produces is h 1 = 0.5 [ 1 - ( d 1 d 0 ) 2 ] * V 1 2 2 g = 0.5 [ 1 - ( d 1 d 0 ) 2 ] * ( d 0 d 1 ) 4 * V 0 2 2 g ;
Secondly, after current are shunted by equal tee, flow velocity becomes V 2, then the loss of flood peak that shunting produces is ζ 1for empirical coefficient, value 1.2;
Again, current are by after two 90 ° of elbows, and producing local head loss is
h 3 = h 4 = ζ 2 * V 2 2 2 g = ζ 2 * 1 4 * ( d 0 d 1 ) 4 * V 0 2 2 g , ζ 2for empirical coefficient, value 1.0;
Then, after current are confluxed by equal tee, flow velocity becomes V 1, the loss of flood peak produced of confluxing is
h 5 = ζ 3 * V 1 2 2 g = ζ 3 * ( d 0 d 1 ) 4 * V 0 2 2 g , ζ 3for empirical coefficient, value 1.1;
Finally, current, by after reducer union, recover caliber d 0, producing local head loss is
h 6 = [ 1 - ( d 1 d 0 ) 2 ] 2 * V 1 2 2 g = [ 1 - ( d 1 d 0 ) 2 ] 2 * ( d 0 d 1 ) 4 * V 0 2 2 g ;
The local head loss that this device produces is all directly directly related with the caliber after the caliber of arm, flow (flow velocity), reducing, the model be applicable to is selected according to arm nominal diameter, flow and Amplitude of Hypotensive, and install a set of in the position needed, can effectively step-down, meet the pressure controlled requirement of arm.
Beneficial effect of the present invention is: structure of the present invention is simple, it is rationally ingenious to design, and the direct a set of product of the present invention of installation on the position that arm is suitable, can effectively reduce arm pressure head, meet the pressure controlled requirement of hilly upland drip irrigation system arm.In addition, product of the present invention is made up of pipeline and accessory completely, directly can be embedded in underground, capable of automatic assembling, also can molding batch production, has easy construction, the feature such as cheap, and equally with general pipeline manages and protects cost without the need to increasing maintenance.
Below in conjunction with accompanying drawing and embodiment, the present invention is further described.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 (a) is that the first model of the present invention is at different flow decline pressure energy power schematic diagram;
Fig. 2 (b) is that the second model of the present invention is at different flow decline pressure energy power schematic diagram;
Fig. 2 (c) is that the third model of the present invention is at different flow decline pressure energy power schematic diagram;
Fig. 2 (d) is that the present invention's the 4th kind of model is at different flow decline pressure energy power schematic diagram;
Fig. 2 (e) is that the present invention's the 5th kind of model is at different flow decline pressure energy power schematic diagram;
Fig. 2 (f) is that the present invention's the 6th kind of model is at different flow decline pressure energy power schematic diagram;
Fig. 2 (g) is that the present invention's the 7th kind of model is at different flow decline pressure energy power schematic diagram;
Fig. 2 (h) is that the present invention's the 8th kind of model is at different flow decline pressure energy power schematic diagram;
Fig. 3 is that the pressure of the present invention's specific embodiment regulates schematic diagram.
Detailed description of the invention
Embodiment: as shown in Figure 1, a kind of hilly upland drip irrigation system of the present invention arm pressure-regulating device, be two straight tubes be arranged in parallel 1 in the middle part of it, the relatively described straight tube 1 in its two ends, left and right is symmetrical, the left end of this two straight tube 1 connects an elbow 2 respectively, described two elbows 2 are connected with the connector at the two ends of same equal tee 3, the middle part connector of this equal tee 3 is connected with a reducer union 4, this reducer union 4 is connected with an inlet attack 5, and this inlet attack 5 is connected with hilly upland drip irrigation system arm.
The length of described straight tube 1 is 0.5m-1.0m.
The first model of product of the present invention, the nominal diameter of this inlet attack 5 is 160mm, one end nominal diameter of this reducer union 4 is 160mm, the other end nominal diameter of this reducer union 4 is 110mm, the nominal diameter of this equal tee 3 is 110mm, this elbow 2 is 90 ° of elbows, and the nominal diameter of this elbow 2 is 110mm, and the nominal diameter of straight tube is 110mm.This model is mainly used in the arm that nominal diameter is 160mm, and under different flow, this type product step-down ability is shown in Fig. 2 (a).
The second model of product of the present invention, the nominal diameter of this inlet attack 5 is 160mm, one end nominal diameter of this reducer union 4 is 160mm, the other end nominal diameter of this reducer union 4 is 90mm, the nominal diameter of this equal tee 3 is 90mm, this elbow 2 is 90 ° of elbows, and the nominal diameter of this elbow 2 is 90mm, and the nominal diameter of straight tube is 90mm.This model is mainly used in the arm that nominal diameter is 160mm, and under different flow, this type product step-down ability is shown in Fig. 2 (b).
The third model of product of the present invention, the nominal diameter of this inlet attack 5 is 110mm, one end nominal diameter of this reducer union 4 is 110mm, the other end nominal diameter of this reducer union 4 is 75mm, the nominal diameter of this equal tee 3 is 75mm, this elbow 2 is 90 ° of elbows, and the nominal diameter of this elbow 2 is 75mm, and the nominal diameter of straight tube is 75mm.This model is mainly used in the arm that nominal diameter is 110mm, and under different flow, this type product step-down ability is shown in Fig. 2 (c).
4th kind of model of product of the present invention, the nominal diameter of this inlet attack 5 is 110mm, one end nominal diameter of this reducer union 4 is 110mm, the other end nominal diameter of this reducer union 4 is 63mm, the nominal diameter of this equal tee 3 is 63mm, this elbow 2 is 90 ° of elbows, and the nominal diameter of this elbow 2 is 63mm, and the nominal diameter of straight tube is 63mm.This model is mainly used in the arm that nominal diameter is 110mm, and under different flow, this type product step-down ability is shown in Fig. 2 (d).
5th kind of model of product of the present invention, the nominal diameter of this inlet attack 5 is 90mm, one end nominal diameter of this reducer union 4 is 90mm, the other end nominal diameter of this reducer union 4 is 63mm, the nominal diameter of this equal tee 3 is 63mm, this elbow 2 is 90 ° of elbows, and the nominal diameter of this elbow 2 is 63mm, and the nominal diameter of straight tube is 63mm.This model is mainly used in the arm that nominal diameter is 90mm, and under different flow, this type product step-down ability is shown in Fig. 2 (e).
6th kind of model of product of the present invention, the nominal diameter of this inlet attack 5 is 90mm, one end nominal diameter of this reducer union 4 is 90mm, the other end nominal diameter of this reducer union 4 is 50mm, the nominal diameter of this equal tee 3 is 50mm, this elbow 2 is 90 ° of elbows, and the nominal diameter of this elbow 2 is 50mm, and the nominal diameter of straight tube is 50mm.This model is mainly used in the arm that nominal diameter is 90mm, and under different flow, this type product step-down ability is shown in Fig. 2 (f).
7th kind of model of product of the present invention, the nominal diameter of this inlet attack 5 is 63mm, one end nominal diameter of this reducer union 4 is 63mm, the other end nominal diameter of this reducer union 4 is 40mm, the nominal diameter of this equal tee 3 is 40mm, this elbow 2 is 90 ° of elbows, and the nominal diameter of this elbow 2 is 40mm, and the nominal diameter of straight tube is 40mm.This model is mainly used in the arm that nominal diameter is 63mm, and under different flow, this type product step-down ability is shown in Fig. 2 (g).
8th kind of model of product of the present invention, the nominal diameter of this inlet attack 5 is 63mm, one end nominal diameter of this reducer union 4 is 63mm, the other end nominal diameter of this reducer union 4 is 32mm, the nominal diameter of this equal tee 3 is 32mm, this elbow 2 is 90 ° of elbows, and the nominal diameter of this elbow 2 is 32mm, and the nominal diameter of straight tube is 32mm.This model is mainly used in the arm that nominal diameter is 63mm, and under different flow, this type product step-down ability is shown in Fig. 2 (h).
Described straight tube 1, elbow 2, equal tee 3, reducer union 4 and inlet attack 5 are made by U-PVC or PE material.
When hilly upland drip irrigation system arm uses this device, concrete steps are as follows:
First, pressure head computational analysis is carried out to arm, determine that this arm needs position and the pressure regulation amplitude of pressure regulation;
Secondly, according to the caliber of this arm, the design discharge (flow velocity) of installation site and required Amplitude of Hypotensive, the model of selecting apparatus, is arranged on the position needing pressure regulation;
Finally, after check arm diverse location installs this device, whether the pressure head distribution of arm meets the requirement of the uniformity, if meet, reasonable in design, if do not meet, adjusted design is until meet the demands further.
Illustrative example illustrates the applicable cases of this device.Tongued bell sugar material sugarcane efficient water-saving irrigation trial zone, Gansu Province, Jiangzhou district, Chongzuo City, a pipe range 180m, is divided into three sections, and first section of 60m nominal diameter is 110mm, and stage casing 60m nominal diameter is 90mm, and rear 60m nominal diameter is 63mm.Arm is laid along slope, and the gradient is 10 °, and hollow billet, perpendicular to arm, is parallel to contour and arranges.Manifold inlet pressure is 8m, and entry design flow is 60m 3/ h, for guaranteeing uniformity of pouring water, arm pressure requirements controls within the scope of 8 ~ 14m.As shown in Figure 3, when not using this device, the pressure head of arm is subject to the impact of topographical elevation difference, and obviously increase along gradient direction, arm terminal pressure even reaches 37m, far exceedes the safe pressure scope that hollow billet can bear, easily booster occurs.For guaranteeing safety and the uniformity of irrigation water appilcation of pipe network system, according to the computational analysis of arm pressure head, use the scheme of this device pressure regulation as follows:
At arm apart from entrance 40m place's step-down, this position arm nominal diameter is 110mm, and flow is 56.0m 3/ h, Amplitude of Hypotensive about 5m, therefore select the product installing a set of device the 4th kind of model;
At arm apart from entrance 70m place's step-down, this position arm nominal diameter is 90mm, and flow is 44.0m 3/ h, Amplitude of Hypotensive about 4m, therefore select the product installing a set of device the 5th kind of model;
At arm apart from entrance 100m place's step-down, this position arm nominal diameter is 90mm, and flow is 32.0m 3/ h, Amplitude of Hypotensive about 5m, therefore select the product installing a set of device the 6th kind of model;
At arm apart from entrance 130m place's step-down, this position arm nominal diameter is 63mm, and flow is 20.0m 3/ h, Amplitude of Hypotensive about 5m, therefore select the product installing a set of device the 7th kind of model;
At arm apart from entrance 160m place's step-down, this position arm nominal diameter is 63mm, and flow is 8.0m 3/ h, Amplitude of Hypotensive about 4m, therefore select the product installing a set of device the 8th kind of model.
As shown in Figure 3, after pressure regulation, the Stress control of arm, within the scope of 8 ~ 14m, meets the requirement of security and uniformity of irrigation water appilcation.
The above is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, and any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (11)

1. a hilly upland drip irrigation system arm pressure-regulating device, it is characterized in that: be two straight tubes be arranged in parallel in the middle part of it, the relatively described straight tube in its two ends, left and right is symmetrical, the left end of this two straight tube connects an elbow respectively, described two elbows are connected with the connector at the two ends of same equal tee, the middle part connector of this equal tee is connected with a reducer union, and this reducer union is connected with a bell and spigot joint.
2. hilly upland drip irrigation system arm pressure-regulating device according to claim 1, it is characterized in that, the length of described straight tube is 0.5m-1.0m.
3. hilly upland drip irrigation system arm pressure-regulating device according to claim 1 or 2, it is characterized in that, the nominal diameter of this bell and spigot joint is 160mm, one end nominal diameter of this reducer union is 160mm, the other end nominal diameter of this reducer union is 110mm, and the nominal diameter of this equal tee is 110mm, and this elbow is 90 ° of elbows, the nominal diameter of this elbow is 110mm, and the nominal diameter of this straight tube is 110mm.
4. hilly upland drip irrigation system arm pressure-regulating device according to claim 1 or 2, it is characterized in that, the nominal diameter of this bell and spigot joint is 160mm, one end nominal diameter of this reducer union is 160mm, the other end nominal diameter of this reducer union is 90mm, and the nominal diameter of this equal tee is 90mm, and this elbow is 90 ° of elbows, the nominal diameter of this elbow is 90mm, and the nominal diameter of this straight tube is 90mm.
5. hilly upland drip irrigation system arm pressure-regulating device according to claim 1 or 2, it is characterized in that, the nominal diameter of this bell and spigot joint is 110mm, one end nominal diameter of this reducer union is 110mm, the other end nominal diameter of this reducer union is 75mm, and the nominal diameter of this equal tee is 75mm, and this elbow is 90 ° of elbows, the nominal diameter of this elbow is 75mm, and the nominal diameter of this straight tube is 75mm.
6. hilly upland drip irrigation system arm pressure-regulating device according to claim 1 or 2, it is characterized in that, the nominal diameter of this bell and spigot joint is 110mm, one end nominal diameter of this reducer union is 110mm, the other end nominal diameter of this reducer union is 63mm, and the nominal diameter of this equal tee is 63mm, and this elbow is 90 ° of elbows, the nominal diameter of this elbow is 63mm, and the nominal diameter of this straight tube is 63mm.
7. hilly upland drip irrigation system arm pressure-regulating device according to claim 1 or 2, it is characterized in that, the nominal diameter of this bell and spigot joint is 90mm, one end nominal diameter of this reducer union is 90mm, the other end nominal diameter of this reducer union is 63mm, and the nominal diameter of this equal tee is 63mm, and this elbow is 90 ° of elbows, the nominal diameter of this elbow is 63mm, and the nominal diameter of this straight tube is 63mm.
8. hilly upland drip irrigation system arm pressure-regulating device according to claim 1 or 2, it is characterized in that, the nominal diameter of this bell and spigot joint is 90mm, one end nominal diameter of this reducer union is 90mm, the other end nominal diameter of this reducer union is 50mm, and the nominal diameter of this equal tee is 50mm, and this elbow is 90 ° of elbows, the nominal diameter of this elbow is 50mm, and the nominal diameter of this straight tube is 50mm.
9. hilly upland drip irrigation system arm pressure-regulating device according to claim 1 or 2, it is characterized in that, the nominal diameter of this bell and spigot joint is 63mm, one end nominal diameter of this reducer union is 63mm, the other end nominal diameter of this reducer union is 40mm, and the nominal diameter of this equal tee is 40mm, and this elbow is 90 ° of elbows, the nominal diameter of this elbow is 40mm, and the nominal diameter of this straight tube is 40mm.
10. hilly upland drip irrigation system arm pressure-regulating device according to claim 1 or 2, it is characterized in that, the nominal diameter of this bell and spigot joint is 63mm, one end nominal diameter of this reducer union is 63mm, the other end nominal diameter of this reducer union is 32mm, and the nominal diameter of this equal tee is 32mm, and this elbow is 90 ° of elbows, the nominal diameter of this elbow is 32mm, and the nominal diameter of this straight tube is 32mm.
11. hilly upland drip irrigation system arm pressure-regulating devices according to claim 1, it is characterized in that, described straight tube, elbow, equal tee, reducer union and bell and spigot joint are made by U-PVC or PE material.
CN201410413726.8A 2014-08-21 2014-08-21 Hilly-slope irrigation system branch pipe pressure regulating device Pending CN104259022A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201410413726.8A CN104259022A (en) 2014-08-21 2014-08-21 Hilly-slope irrigation system branch pipe pressure regulating device

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Application Number Priority Date Filing Date Title
CN201410413726.8A CN104259022A (en) 2014-08-21 2014-08-21 Hilly-slope irrigation system branch pipe pressure regulating device

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Publication Number Publication Date
CN104259022A true CN104259022A (en) 2015-01-07

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Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS543441U (en) * 1977-06-13 1979-01-10
JPS54115349U (en) * 1977-04-22 1979-08-13
JPS5435366Y2 (en) * 1976-05-22 1979-10-27
JPS5664766U (en) * 1979-10-24 1981-05-30
US4562963A (en) * 1983-10-17 1986-01-07 Butler Maynard H Garden sprinkler
US5357710A (en) * 1993-09-10 1994-10-25 Robert E. Dulik Plant watering trellis
CA2196609A1 (en) * 1997-01-27 1998-07-27 Casey Marques Outdoor garden irrigation multibase system
JP2007116968A (en) * 2005-10-27 2007-05-17 Kumamoto Ujo Nogyo Kyodo Kumiai Method and device for cultivating plant
US20070138323A1 (en) * 2005-12-16 2007-06-21 Seo Won Co., Ltd. Drip irrigation hose
CN201115369Y (en) * 2007-11-07 2008-09-17 赵明 Mobile microtube dense porous inrush current irrigator
CN203057987U (en) * 2013-01-29 2013-07-17 杭州中艺园林工程有限公司 Double-effect drip irrigation emitter and irrigation system comprising same
CN203646222U (en) * 2014-01-17 2014-06-18 北京捷西农业科技有限责任公司昌平应用技术分公司 Soil disinfection plant based on drip irrigation system

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5435366Y2 (en) * 1976-05-22 1979-10-27
JPS54115349U (en) * 1977-04-22 1979-08-13
JPS543441U (en) * 1977-06-13 1979-01-10
JPS5664766U (en) * 1979-10-24 1981-05-30
US4562963A (en) * 1983-10-17 1986-01-07 Butler Maynard H Garden sprinkler
US5357710A (en) * 1993-09-10 1994-10-25 Robert E. Dulik Plant watering trellis
CA2196609A1 (en) * 1997-01-27 1998-07-27 Casey Marques Outdoor garden irrigation multibase system
JP2007116968A (en) * 2005-10-27 2007-05-17 Kumamoto Ujo Nogyo Kyodo Kumiai Method and device for cultivating plant
US20070138323A1 (en) * 2005-12-16 2007-06-21 Seo Won Co., Ltd. Drip irrigation hose
CN201115369Y (en) * 2007-11-07 2008-09-17 赵明 Mobile microtube dense porous inrush current irrigator
CN203057987U (en) * 2013-01-29 2013-07-17 杭州中艺园林工程有限公司 Double-effect drip irrigation emitter and irrigation system comprising same
CN203646222U (en) * 2014-01-17 2014-06-18 北京捷西农业科技有限责任公司昌平应用技术分公司 Soil disinfection plant based on drip irrigation system

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Application publication date: 20150107