TWI711369B - Adjustable drip rate irrigation device - Google Patents

Abstract

An adjustable drip rate irrigation device, which comprises a four-way cross tube; a metal tube that contains copper and silver material which is inserted into the front opening of the four-way cross tube; a bolt that inserted from the rear opening of the four-way cross tube. When the bolt is screwed into the metal tube, the cylinder outer wall of the rear part of the bolt will form an annular cylindrical channel with a very small gap between the inner wall of the metal tube inner wall. When the liquid flows go through the annular cylindrical channel, the flow resistance generated by the liquid viscosity will slow down the flow rate. By adjust the depth of the cylindrical part of the bolt in the metal tube, to change the annular cylindrical channel length, then adjusts the liquid flow rate.

Description

Adjustable rate drip irrigation device

The present invention relates to a liquid flow adjustment device; in particular, it relates to an adjustable rate drip irrigation device, which uses the friction force generated by the liquid itself and the inner and outer tube walls when the liquid flows through the annular cylindrical channel inside the device to slow down the liquid flow rate, and through An adjustable rate drip irrigation device that changes the length of the annular cylindrical channel wall to adjust the liquid flow rate.

For example, a typical device disclosed in Zhonghua Mingguo Patent Information Search No. I527514 published on February 16, 2016 includes a drip irrigation head assembly...

For example, a typical device disclosed in the Zhonghua Mingguo Patent Information Search No. M554257 published on January 21, 2018 includes a drip irrigation device...

For example, a typical device disclosed in Zhonghua Mingguo Patent Information Search No. M464992 published on November 11, 2013 includes a barreled drip irrigation device...

The known drip irrigation devices are limited to a few functions. For example, its device bends the small water flow path in a labyrinth to extend the water flow out time. In order to avoid blockage of this device, the pipe diameter must be maintained at a sufficient size, usually above 0.5mm. The effect of this design on reducing the flow velocity is very small. For example, when a small water flow passes through the water flow path, the flow resistance caused by the friction between the water flow and the pipe wall can slow the flow velocity. According to the principle of fluid mechanics, when the pipe diameter is small , The distance between the water flow and the pipe wall in the central area of the pipeline is small, and the friction between the water flow and the pipe wall also increases. The flow resistance generated increases accordingly, but in order to avoid clogging, the pipe diameter must be kept at a sufficient size. Therefore, the flow resistance that can be generated by the friction between the water flow and the pipe wall is limited. Usually, the pipe diameter is reduced to a limit. It is necessary to rely on extending the water flow path as a means to increase the flow resistance. However, due to the limitation of the equipment volume, the water flow path must be curved and circumvented like a maze and cannot be extended arbitrarily. The pipe diameter cannot be effectively reduced and the water flow path cannot be extended arbitrarily. In actual operation, this device cannot effectively slow down the flow rate and reduce the flow rate. The effect of long-term continuous use of this device, the total flow still exceeds the actual irrigation needs. Therefore, it is necessary to set a switch at the water source to control the total flow of irrigation with a manual or electronic timer; and this kind of drip irrigation technology, the water flow path is small and curved, and the tiny particles in the water are also easy to accumulate in the curved part of the water flow path when the water flow is stationary. It is easier for biological cells such as algae to adhere and grow throughout the pipeline when it is stationary. It is necessary to regularly remove algae and clean by chemical dosing or manual disassembly and replacement of parts to avoid clogging. The design of this type of drip irrigation device requires additional manpower or electrical equipment management, and chemical maintenance or manual cleaning. The reduced labor cost during use is limited, and it may harm crops, pollute the environment, and violate the natural and sustainable operation method .

Therefore, it is necessary to develop an adjustable rate drip irrigation device that eliminates the limitation of pipe diameter, does not need to deliberately extend the water flow path, and can effectively slow down the flow rate, and can provide flow adjustment for the different water supply requirements of each single plant. It is not only convenient to operate and easy to install, but also because of its simple structure, not easy to block, and stable flow and continuous water supply without additional water volume adjustment equipment. The use of this design will greatly reduce manpower requirements and maintenance costs.

The adjustable rate drip irrigation device of the present invention includes a cross four-way joint, a metal sleeve inserted into the front opening of the cross four-way joint and containing copper and silver components, and a movable bolt inserted through the rear opening of the cross four-way joint. When the movable bolt is screwed into the metal sleeve, after the movable bolt The gap between the outer wall of the cylindrical section and the inner wall of the rear section of the metal sleeve will surround the outer wall of the rear section of the movable bolt along the joint to form a circular cylindrical channel with a very small gap. When the liquid flows through this annular cylindrical channel with a very small gap, an annular water flow is formed. The distance between the water flow and the inner and outer pipe walls in the entire area of the annular water flow is extremely small, so that the overall water flow is between the inner and outer pipe walls of the annular cylindrical channel Significant friction is generated, so the flow resistance is greatly increased, which effectively slows down the flow rate. By rotating the movable bolt, the depth of the rear cylinder screwed into the inner wall of the metal casing is adjusted, and the outer wall of the cylinder of the movable bolt rear section and the rear section of the metal casing are changed. The length of the joint of the inner wall can be used to change the length of the circular cylindrical channel in the axial direction to adjust the flow rate of the liquid after passing through. Because the annular cylindrical channel with extremely small gaps inside the device of the present invention can generate significant flow resistance, the required water flow channel length is only required to provide operation to adjust the flow rate, without deliberate extension, so the volume of the device can be greatly reduced.

The present invention uses the flow resistance generated by the annular water flow formed when the liquid passes through the annular cylindrical channel with a very small gap to achieve the effect of slowing down the liquid flow rate. And this annular cylindrical channel with very small clearance is a simple and easy-to-use design. When the outer wall diameter of the movable bolt rear cylinder and the inner wall diameter of the metal sleeve are preset, and the length of the annular cylindrical channel is adjusted, The liquid flow rate can be derived according to the fluid formula of the annular cylindrical channel in the Poiseuille Equation of fluid mechanics. When the liquid is at a fixed pressure difference, the required liquid flow rate can be calculated in advance. This design is suitable for various water supply pressures, not only has a significant effect on slowing down the flow rate, but also can pre-set the length of the circular cylindrical channel before installation to adjust different liquid flow rates to meet the needs of each single plant, and reduce Cost of installation man-hours. And because the annular cylindrical channel of the original design has a very small gap, the cross section of the channel is a ring structure with a very small gap, so the general granular impurities are not easy to enter, and the sterilization properties of the copper-silver alloy are used to avoid algae Adhesion and breeding cause obstruction, allowing users to continue to supply water for a long time after installation, reducing maintenance costs.

1: Adjustable rate drip irrigation device

2: Metal casing

3: movable bolt

4: Cross four-way connector

5: The front part of the metal casing is necked

6: Threads on the inner wall of the front neck of the metal casing

7: The inner wall of the back section of the metal casing

8: Cross joint left and right opening

9: Front opening of cross four-way joint

10: The rear opening of the cross four-way joint

11: Waterstop rubber ring

12: Movable bolt water stop rubber ring

13: Front thread of movable bolt

14: Movable bolt water stop rubber ring fixing groove

15: Cylinder of movable bolt rear section

16: End nut of the rear end of the movable bolt

17: Annular cylindrical channel

18: Gap between screw teeth

19: Water supply pipe

20: Terminal water outlet

21: Terminal water stop

22: Adjusting method of movable nut

23: Schematic diagram of liquid output flow rate

Figure 1 is a perspective view of an adjustable rate drip irrigation device according to the present invention.

Figure 2 is an anatomical perspective view of the adjustable rate drip irrigation device of the present invention.

Figure 3 is a perspective view of the joining method of the detailed parts of the present invention.

Figure 4 is a top sectional view of the present invention.

Figure 5 is a cross-sectional view of the adjustment and change comparison of the present invention.

Figure 6 is a reference diagram of the present invention in use.

Figure 7 is a reference table for the comparison between the length of the annular cylindrical channel and the liquid flow rate of the theoretical calculation value of the present invention.

Generally according to the present invention, the optimal adjustable rate drip irrigation device includes a cross four-way joint, a metal sleeve, and a movable bolt. Please refer to Figure 1, Figure 3 and Figure 4. The adjustable rate drip irrigation device 1 includes a cross four-way joint 4 and a metal sleeve 2, which fits the metal sleeve 2 to the cross four-way joint in a fitting manner On the inner wall of the front opening 9, the movable bolt 3 is inserted in the axial direction of the rear opening 10 of the cross four-way joint. When the front thread 13 of the movable bolt is screwed into the thread 6 of the inner wall of the front necking of the metal casing, the rear cylinder 15 of the movable bolt The gap between the joint between the outer wall and the inner wall 7 of the rear section of the metal casing will surround the outer wall of the movable bolt rear section cylinder 15 along the joint to form an annular cylindrical channel 17 with a very small gap. The liquid flows through the annular cylindrical channel 17 At the time, an annular water flow will be formed. The water flow in the whole area of the annular water flow and the annular cylindrical channel 17 The distance between the inner and outer pipe walls is extremely small, which significantly increases the friction between the overall water flow and the inner and outer pipe walls, and the resulting flow resistance is greatly increased to achieve the effect of slowing down the liquid flow rate; after the flow rate is slowed, the liquid flows through the front section of the movable bolt. The channel formed between the thread 13 and the inner wall 7 of the rear section of the metal sleeve flows out from the gap 18 between the thread 13 of the front section of the movable bolt and the inner wall of the front section of the metal sleeve. The diameter of 13 must be smaller than the diameter of the inner wall 7 of the back section of the metal casing to reduce the influence on the liquid flow rate after flowing out of the annular cylindrical channel 17. The gap 18 at the screw bite should be as short and shallow as possible, and the gap should be large enough to slow down the flow rate. Then the liquid flows out. Referring to Figures 4, 5 and 7, the rear end nut 16 of the movable bolt extends to the outside of the rear opening 10 of the cross four-way joint for operation and adjustment. By rotating the rear end nut 16 of the movable bolt, the front end screw of the movable bolt is driven. 13 When screwing into the thread 6 of the necked inner wall of the front section of the metal casing, adjust the depth of the outer wall of the rear section of the movable bolt 15 to the inner wall 7 of the rear section of the metal casing, and change the outer wall of the rear section of the movable bolt 15 and the inner wall of the rear section of the metal casing. The length of the junction of the walls 7 is used to change the length of the circular cylindrical channel 17 in the axial direction, and the liquid flows through the shorter circular cylindrical channel 17 and then produces less flow resistance or the liquid flows through the longer circular column. The channel 17 has the characteristic of greater flow resistance, and the length of the annular cylindrical channel 17 is changed to achieve the effect of adjusting the speed of the liquid flow rate. Referring to Figs. 4 and 6, the outer wall of the front opening 9 of the cross four-way joint is used to connect the water supply pipe 19 to guide the liquid after adjusting the flow rate to the desired planting area. The gap between the rear cylinder 15 of the movable bolt and the inner wall of the rear opening 10 of the cross four-way joint is fixed with a water-stop rubber ring 11 to prevent liquid from the gap between the inner wall of the rear opening 10 of the cross four joint and the outer wall of the rear cylindrical 15 of the movable bolt Outflow. The outer wall of the left and right openings 8 of the cross four-way joint is used to connect the water supply pipe 19 to supply water and to connect the water out in series to the next adjustable rate drip irrigation device 1.

1: Adjustable rate drip irrigation device

2: Metal casing

3: movable bolt

4: Cross four-way connector

5: The front part of the metal casing is necked

8: Cross joint left and right opening

13: Front thread of movable bolt

15: Cylinder of movable bolt rear section

16: End nut of the rear end of the movable bolt

Claims (2)

An adjustable rate drip irrigation device, comprising: a cross four-way joint; a metal sleeve that can be inserted into the inside of the opening of the front section of the cross four-way joint, the metal sleeve is made of copper-silver alloy material; and a cross four-way joint The movable bolt inserted into the rear opening of the joint; the metal sleeve is fitted into the inner wall of the front opening of the cross four-way joint, and the movable bolt is inserted from the axis of the rear opening of the cross four-way joint until the front thread of the movable bolt is screwed into the metal The threaded thread on the inner wall of the neck of the front section of the casing, the metal sleeve and the movable bolt are combined, and the gap between the outer wall of the cylindrical body of the rear section of the movable bolt and the inner wall of the rear section of the metal sleeve will surround the rear section of the movable bolt along the joint. A circle of the outer wall forms an annular cylindrical channel with a very small gap. The junction between the inner wall of the rear section of the metal sleeve and the outer wall of the cylinder at the rear section of the movable bolt forms the inner and outer wall structure of the annular cylindrical channel; When flowing through the junction between the outer wall of the cylindrical body of the rear section of the movable bolt and the inner wall of the rear section of the metal casing, an annular columnar channel formed with a very small gap will form an annular water flow. The water flow in the entire area of this annular water flow is in the annular columnar channel The distance between the outer walls is extremely small, which significantly increases the friction between the overall water flow and the inner and outer walls, and the resulting flow resistance is greatly increased, achieving the effect of slowing down the liquid flow rate; by rotating the rear terminal nut of the movable bolt, the front thread of the movable bolt is driven When screwing into the thread of the necked inner wall of the front section of the metal casing, adjust the depth at which the rear cylinder of the movable bolt is inserted into the inner wall of the rear section of the metal sleeve, and change the length of the joint between the outer wall of the cylinder of the rear section of the movable bolt and the inner wall of the rear section of the metal casing. Change the length of the circular cylindrical channel in the axial direction. When the liquid flows through the shorter circular cylindrical channel, a smaller flow resistance is generated. After the liquid flows through the longer circular cylindrical channel, a larger flow occurs. The characteristics of resistance, by changing the length of the circular cylindrical channel in the axial direction, you can adjust the liquid flow rate The effect: the liquid after slowing down and adjusting the flow rate will flow through the channel formed between the front thread of the movable bolt and the inner wall of the back section of the metal casing, and then the thread from the front section of the movable bolt and the inner wall of the necked inner wall of the metal casing After the teeth are joined, the screw teeth gap flows out; the rear end nut of the movable bolt extends to the outside of the rear opening of the cross four-way joint for operation to adjust the flow rate. The outer wall of the front opening of the cross four-way joint is used to connect the water supply pipe to guide the liquid to the implant. The area required for planting; the space between the outer wall of the cylinder at the rear of the movable bolt and the inner wall of the opening at the rear of the cross four-way joint, and a water-stop rubber ring is fixed to prevent liquid from flowing out of the gap in the rear opening of the cross four-way joint; It is used to connect the water supply pipe to supply water and connect the water to the next adjustable rate drip irrigation device. The adjustable rate drip irrigation device according to the first item of the scope of patent application, which further includes the front opening of the metal casing is retracted to form a neck of the front section of the metal casing, and the inner wall of the front neck of the metal casing is provided with threads to form a metal The thread on the inner wall of the front part of the sleeve is necked. This thread on the inner wall of the front part of the metal sleeve is used to join the thread of the front section of the movable bolt. After inserting the metal sleeve, the gap formed between the inner wall of the back section of the metal sleeve and the outer wall of the cylindrical body of the rear section of the movable bolt will surround the outer wall of the cylindrical section of the rear section of the movable bolt along the joint to form a circular cylindrical channel with a very small gap ; The front section of the movable bolt is provided with threads for screwing into the inner wall threads of the front section of the metal sleeve. The front section of the movable bolt should have enough length to provide adjustment for the cylindrical body of the rear section of the movable bolt to be inserted into the metal sleeve The depth of the joint of the inner wall of the rear section of the pipe. The outer wall of the rear section of the movable bolt is a smooth cylinder, which is used to make the gap formed between the joint between the outer wall of the rear section of the movable bolt and the inner wall of the rear section of the metal sleeve after the metal sleeve is inserted , Surround the outer wall of the cylinder at the rear of the movable bolt along the joint to form a circular cylindrical channel with a very small gap. After the metal sleeve is combined with the movable bolt, the metal sleeve The joint between the inner wall of the section and the outer wall of the cylinder at the rear of the movable bolt is the structure that forms the inner and outer walls of the annular cylindrical channel; when liquid flows through this annular cylindrical channel with a very small gap, an annular water flow will be formed, this annular water flow The distance between the water flow in the whole area and the inner and outer pipe walls of the annular cylindrical channel is extremely small, which significantly increases the friction between the overall water flow and the inner and outer pipe walls, and the resulting flow resistance is greatly increased, achieving the effect of slowing down the liquid flow rate; through rotating activities The terminal nut of the rear section of the bolt drives the front thread of the movable bolt to be screwed into the depth of the thread on the inner wall of the front section of the metal sleeve, thereby adjusting the outer wall of the rear section of the movable bolt and inserting the length of the joint of the inner wall of the rear section of the metal sleeve to Changing the length of the annular cylindrical channel in the axial direction, the effect of adjusting the speed of the liquid flow can be achieved by changing the length of the annular cylindrical channel in the axial direction; the diameter of the thread of the front section of the movable bolt must be as small as the diameter of the inner wall of the back section of the metal casing , In order to reduce the flow rate of the liquid flowing out of the annular cylindrical channel, it is interfered by the channel formed between the thread of the front section of the movable bolt and the inner wall of the rear section of the metal casing; After the teeth are engaged, the gap between the screw occlusion should be as short and shallow as possible, and the gap should be large enough for the liquid to flow out after slowing the flow rate.

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