阅读说明：本技术 保持流量稳定的过水器 (Water passing device capable of keeping flow stable ) 是由 许艇 耿庆柱 张宝瑞 刘玉玺 王景涛 王立群 李庆铁 赵春涛 穆全平 李淼 于 2019-11-13 设计创作，主要内容包括：本发明公开了一种保持流量稳定性的过水器,包括作为流道的圆形管和位于圆形管内部的簧片,在圆形管中设置有多组结构相同、依次布置的簧片组,每组簧片由四至六个形状相同的瓣形簧片拼接而成,每组簧片固定于圆形管管壁同一圆周上,各簧片与圆形管进水侧管壁夹角为锐角,瓣形簧片随着水流的流速变化摆动,拼接成闭合的圆形孔结构,使过水器出口形成稳定的水流。本发明通过改变过水器内部结构,克服了传统过水器在水头变化较大时流量变化极大的缺点,通过优化其结构,确保水头变化不超过40％的条件下,过水器流量偏差低于10％。(The invention discloses a water passing device capable of keeping flow stability, which comprises a circular pipe as a flow passage and reeds positioned in the circular pipe, wherein a plurality of groups of reed groups with the same structure and arranged in sequence are arranged in the circular pipe, each group of reeds is formed by splicing four to six petal-shaped reeds with the same shape, each group of reeds is fixed on the same circumference of the pipe wall of the circular pipe, the included angle between each reed and the pipe wall of the water inlet side of the circular pipe is an acute angle, and the petal-shaped reeds swing along with the change of the flow velocity of water flow and are spliced into a closed circular hole structure, so that a stable water flow is. The invention overcomes the defect of great flow change of the traditional water passing device when the water head changes greatly by changing the internal structure of the water passing device, and ensures that the flow deviation of the water passing device is less than 10 percent under the condition that the water head changes by no more than 40 percent by optimizing the structure.)

1. The utility model provides a keep flow stability's water passing device, include the circular duct as the runner and be located the inside reed of circular duct, a serial communication port, it is the same to be provided with the multiunit structure in the circular duct, the reed group who arranges in proper order, every group reed is formed by four to six petal reed concatenations that the shape is the same, every group reed is fixed in on the same circumference of circular duct pipe wall, each reed and circular duct intake side pipe wall contained angle are the acute angle, the petal reed swings along with the velocity of flow change of rivers, splice into closed circular port structure, make the water passing device export form stable rivers.

2. A water passing device capable of keeping flow stability according to claim 1, wherein the included angle between each reed and the wall of the water inlet side pipe is 15-25 degrees, and the petal-shaped reeds are spliced into a circular hole with the diameter 0.6 times that of the circular pipe in the middle after being spliced.

3. A water pass device for maintaining flow stability according to claim 1, wherein the radius of the curved surface of each reed is equal to the radius of the pipe of the circular pipe, and the distance between each reed and the inner wall of the circular pipe is 0.3-0.4 times of the radius of the circular pipe.

Technical Field

The invention relates to a water passing device, in particular to a water passing device capable of keeping flow stable.

Background

In order to keep the flow in the flow channel stable, structures such as water passing devices, drippers, irrigation emitters and the like with different structural types are arranged in the flow channel at present. When water flows through the flow channel, hydraulic energy dissipation is carried out by changing the structure in the flow channel, so that the flow in the flow channel is stable, and the method for keeping stable flow and energy dissipation in the existing water passing device comprises the steps of reducing the flow area or increasing the length of the flow channel and the like. Due to the consideration of comprehensive factors such as stable flow, anti-blocking performance, cost and the like, the design of the water passing device has extremely high requirements.

Disclosure of Invention

The invention aims to solve the technical problem of providing the water passing device capable of keeping the flow stability, overcomes the defect of great flow change of the traditional water passing device when the water head changes greatly by changing the internal structure of the water passing device, reduces the flow fluctuation range and ensures that the water passing device has the flow stability.

In order to solve the technical problems, the invention adopts the technical scheme that: the utility model provides a keep flow stability's water passing device, include the circular tube as the runner and be located the inside reed of circular tube, be provided with the multiunit structure the same in the circular tube, the reed group that arranges in proper order, every group reed is formed by four to six petal reeds splices that the shape is the same, every group reed is fixed in on the same circumference of circular tube pipe wall, each reed and circular tube intake side pipe wall contained angle are the acute angle, the petal reed swings along with the velocity of flow change of rivers, splice into closed circular port structure, make water passing device export form stable rivers.

The included angle between each reed and the wall of the water inlet side pipe is 15-25 degrees, and the middle of each petal-shaped reed is spliced into a circular hole with the diameter being 0.6 times that of the circular pipe after being spliced.

The radius of the curved surface of each reed is the same as the radius of the circular pipe, and the maximum distance between each reed and the inner wall of the circular pipe is 0.3-0.4 times of the radius of the circular pipe.

The invention has the beneficial effects that: the internal structure of the water passing device is changed, the defect that the flow change of the traditional water passing device is large when the water head changes greatly is overcome, and the flow deviation of the water passing device is lower than 10% under the condition that the water head changes by no more than 40% by optimizing the structure of the water passing device.

Drawings

Fig. 1 is a perspective view of a water passing device for keeping flow stable according to the present invention.

FIG. 2 is a schematic structural diagram of the water passing device of the present invention in an initial state for maintaining flow stability.

FIG. 3 is a cross-sectional view of the sprinkler structure of the present invention in an initial state of the sprinkler for maintaining flow stability.

FIG. 4 is a schematic structural diagram of the water passing device of the present invention under high water head and flow rate conditions to maintain stable flow.

FIG. 5 is a cross sectional view of the water passing device structure in a high head and flow rate state for maintaining flow stability according to the present invention.

Detailed Description

The invention is described in further detail below with reference to the following figures and detailed description:

the water passing device capable of keeping flow stability comprises a circular pipe serving as a flow channel and reeds positioned in the circular pipe, wherein a plurality of groups of reed groups with the same structure and arranged in sequence are arranged in the circular pipe, each group of reeds is formed by splicing four to six petal-shaped reeds with the same shape, each group of reeds is fixed on the same circumference of the pipe wall of the circular pipe, an included angle between each reed and the pipe wall of the water inlet side of the circular pipe is an acute angle, and the petal-shaped reeds swing along with the change of the flow velocity of water flow and are spliced into a closed circular hole structure, so that a stable water flow is formed.

The included angle between each reed and the wall of the water inlet side pipe is 15-25 degrees, and the middle of each petal-shaped reed is spliced into a circular hole with the diameter being 0.6 times that of the circular pipe after being spliced.

The radius of the curved surface of each reed is the same as the radius of the circular pipe, and the maximum distance between each reed and the inner wall of the circular pipe is 0.3-0.4 times of the radius of the circular pipe.

As shown in fig. 1-4, taking a four-piece-shaped reed as an example, the flow channel is a circular tube 1, and the tube comprises a top reed 2, a bottom reed 3, a left part reed 4 and a right part reed 5.

The diameter D of the pipeline is 50mm, the diameter D of a circular hole in the middle of the spliced petal-shaped reeds is 30mm, the variable range of the distance value between the tail ends of the petal-shaped reeds and the pipe wall is 5-10 mm, the included angle alpha between the connecting line of the end parts of the reeds and the root part and the pipe wall is 15 degrees, the variable range is 15-25 degrees, and when the initial water head h is 2m, the outlet flow q is 750 multiplied by 10^-6m³And/s, when the fluctuation range of the water head h is +/-0.8 m, the variation range of the outlet flow q is 680 multiplied by 10^-6～810×10^-6m³/s。

In the invention, under the action of water pressure in the water flow direction, the included angle between the reed and the pipe wall and the gap value between the reed and the pipe change along with the change of a water head: when the water head is increased, the included angle between the reeds and the pipe wall is increased, the gap between the petal-shaped reeds is reduced, the flow velocity is increased compared with the initial level, but the effective overflowing area is reduced, and when the water head is increased to a certain degree, the petal-shaped reeds are closed and only the middle hole is left for overflowing; when the water head is reduced, the included angle between the reeds and the pipe wall is reduced, the gap value between the petal-shaped reeds is increased, and the flow velocity of water flow is reduced but the effective flow area is increased. The invention changes the pipe flow area under different water pressure and flow speed by changing the internal structure of the water passing device, thereby realizing the function of keeping the flow stability, overcoming the defect of great flow change of the traditional water passing device when the water head change is large, and ensuring that the flow deviation of the water passing device is lower than 10 percent under the condition that the water head change is not more than 40 percent by optimizing the structure.

The invention overcomes the defect of great flow change of the traditional water passing device when the water head changes greatly by changing the internal structure of the water passing device. Therefore, the flow fluctuation amplitude is reduced, the water passing device has flow stability, can be applied to the drip irrigation technology, and can realize effective and automatic flow control. Therefore, the flow through the branch pipes at all levels is basically the same, stable and uniform irrigation of crops is realized, and the irrigation efficiency and the irrigation quality are improved.

The above-mentioned embodiments are only for illustrating the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and to carry out the same, and the present invention shall not be limited to the embodiments, i.e. the equivalent changes or modifications made within the spirit of the present invention shall fall within the scope of the present invention.