Quantitative determination device for increasing oxygen by utilizing Venturi effect

Abstract

The utility model relates to a quantitative measuring device for oxygenation by utilizing Venturi effect, which comprises an irrigation pipe, a first narrowing pipe with variable inner diameter is arranged in the irrigation pipe, and two ends of the first narrowing pipe are connected with the inner wall of the irrigation pipe through a first reducer pipe; the first narrowing pipe is used for increasing the flow speed of fluid in the irrigation pipe; the pipe wall of the first narrowing pipe is connected with an oxygen increasing pipe, and the oxygen increasing pipe is used for increasing oxygen into the irrigation pipe. A first threaded rod abuts against the outer pipe wall of the first narrowing pipe, and the first threaded rod is in threaded connection with the pipe wall of the irrigation pipe and used for changing the inner diameter of the first narrowing pipe. Through the first narrow tube with the variable inner diameter, the mathematical relationship between different sections of the first narrow tube and the oxygenation amount is obtained, the size of the first narrow tube is adjusted according to crops with different oxygen demands, and oxygenation irrigation is accurately achieved for different crops.

Description

Technical Field

[0001] The utility model relates to the technical field of Venturi effect oxygenation measurement, in particular to a quantitative measurement device utilizing the Venturi effect for oxygenation. Background Art

[0002] During plant irrigation, maintaining adequate oxygen levels in the water plays a key role in plant growth. Prolonged periods of hypoxic irrigation reduce soil oxygen levels, leading to root hypoxia and reduced crop vigor. The Venturi effect can be used for oxygenated irrigation. A Venturi tube is a pipe that initially contracts and then gradually expands, consisting of three sections: a "contraction section," a "throat," and a "diffusion section."

[0003] In the prior art, when a venturi tube is used for oxygenated irrigation, an opening is generally opened on one side of the throat section of the venturi tube. Air is introduced into the venturi tube from the opening of the throat section by utilizing the high flow rate and low pressure of the fluid in the throat section of the venturi tube. The air is mixed with the fluid in the venturi tube, thereby increasing the air in the liquid in the venturi tube and achieving oxygenated irrigation.

[0004] However, there is currently no device for quantitatively detecting the amount of air and oxygen added during Venturi tube irrigation, and different oxygenation device structural parameters cannot be given for different crops to meet the oxygenation requirements of different crops. Utility Model Content

[0005] The main purpose of the utility model is to provide a quantitative measurement device for oxygenation using the Venturi effect, aiming to solve the problem that there is no device for quantitatively measuring the amount of increased air and oxygen during the irrigation process.

[0006] To achieve the above-mentioned purpose, the present invention proposes a quantitative measurement device for increasing oxygen using the Venturi effect, the quantitative measurement device for increasing oxygen using the Venturi effect comprising:

[0007] An irrigation pipe having a first bundle of narrow tubes with a variable inner diameter, wherein both ends of the first bundle of narrow tubes are connected to the inner wall of the irrigation pipe via a first reducing pipe; the first bundle of narrow tubes is used to increase the flow rate of the fluid in the irrigation pipe;

[0008] The tube wall of the first bundle of narrow tubes is connected with an oxygenation tube, and the oxygenation tube is used to add oxygen into the irrigation tube.

[0009] The outer tube wall of the first bundle of narrow tubes is abutted with a first threaded rod, and the first threaded rod is threadedly connected to the tube wall of the irrigation tube for changing the size of the inner diameter of the first bundle of narrow tubes.

[0010] Preferably, a second bundle of narrow tubes with a variable inner diameter is provided inside the aeration tube, and both ends of the second bundle of narrow tubes are connected to the inner wall of the aeration tube through a second reducing tube. The outer tube wall of the second bundle of narrow tubes is abutted with a second threaded rod, and the second threaded rod is threadedly connected to the tube wall of the aeration tube for changing the size of the inner diameter of the second bundle of narrow tubes.

[0011] Preferably, the oxygenation tube is vertically connected to the first bundle of narrow tubes.

[0012] Preferably, the outlet of the second bundle of narrow tubes is arranged close to the first bundle of narrow tubes.

[0013] Preferably, a front test probe is provided on the wall of the irrigation pipe at the inlet of the first bundle of narrow tubes, and a rear test probe is provided on the wall of the irrigation pipe at the outlet of the first bundle of narrow tubes.

[0014] Preferably, a first pressure gauge is provided on the wall of the irrigation pipe at the inlet of the first bundle of narrow tubes, and a second pressure gauge is provided on the wall of the first bundle of narrow tubes at the inlet of the first bundle of narrow tubes.

[0015] Preferably, a third pressure gauge is provided on the wall of the oxygenation pipe at the inlet of the second bundle of narrow tubes, and a fourth pressure gauge is provided on the wall of the second bundle of narrow tubes at the inlet of the second bundle of narrow tubes.

[0016] Preferably, the inner diameter of the oxygenation tube is smaller than the length of the first bundle of narrow tubes.

[0017] Preferably, the first threaded rod and the second threaded rod are provided with a limit block, and the limit block is used to limit the movement stroke of the first threaded rod and the second threaded rod.

[0018] Preferably, the inner diameter of the aeration pipe is smaller than the inner diameter of the irrigation pipe.

[0019] In this utility model, a first bundle of narrow tubes with a variable inner diameter is installed inside the irrigation pipe, and an aeration tube is connected to the first bundle of narrow tubes, allowing air to enter the irrigation pipe. A second bundle of narrow tubes is installed in the aeration tube, forming a Venturi section within the aeration tube. Using the Venturi tube principle to measure flow rate, multiplied by the operating time, the air volume, and thus the oxygen volume, can be calculated. Furthermore, the size of the narrow tubes can be varied to determine the relationship between the inner diameter of the narrow tubes and the oxygen volume, providing accurate oxygenation efficiency data. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the overall structure of the quantitative measurement device for increasing oxygen using the Venturi effect of the present invention.

[0021] In the accompanying drawings: 1-irrigation pipe; 2-first pressure gauge; 3-first bundle of narrow tubes; 4-second pressure gauge; 5-second reducer; 6-oxygenation pipe; 7-second threaded rod; 8-first threaded rod; 9-third pressure gauge; 10-fourth pressure gauge; 11-second bundle of narrow tubes; 12-front test probe; 13-first reducer; 14-rear test probe. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the schemes in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0024] It should also be noted that when an element is referred to as being "fixed on" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element.

[0025] In addition, the descriptions of "first," "second," etc. in this utility model are for descriptive purposes only and should not be understood as indicating or implying their relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this utility model.

[0026] The utility model provides a quantitative determination device for oxygenation by utilizing the Venturi effect, which is mainly used in the field of oxygenation measurement.

[0027] Reference Figure 1 As shown, in one embodiment of the present invention, a quantitative measurement device for oxygenation using the Venturi effect includes:

[0028] The irrigation pipe 1 is provided with a first bundle of narrow tubes 3 with a variable inner diameter. Both ends of the first bundle of narrow tubes 3 are connected to the inner wall of the irrigation pipe 1 through a first diameter reducing pipe 13. The first bundle of narrow tubes 3 is used to increase the flow rate of the fluid in the irrigation pipe 1.

[0029] The wall of the first bundle of narrow tubes 3 is connected to an aeration tube 6, which is used to add oxygen into the irrigation tube 1;

[0030] The outer tube wall of the first bundle of narrow tubes 3 is abutted against a first threaded rod 8 , which is threadedly connected to the tube wall of the irrigation tube 1 for changing the size of the inner diameter of the first bundle of narrow tubes 3 .

[0031] In this embodiment, the irrigation pipe 1 is a cylindrical conduit primarily used to transport irrigation fluid (water or other solutions). A first bundle of narrow tubes 3 with an adjustable inner diameter is located within the irrigation pipe 1, along the fluid flow direction. This first bundle of narrow tubes 3 is connected to the inner wall of the irrigation pipe 1 via first reducers 13 at both ends, creating a smooth transition between the fluid passages of the first bundle of narrow tubes 3 and the irrigation pipe 1, forming a fluid passage smaller than the inner diameter of the irrigation pipe 1. The primary function of the first bundle of narrow tubes 3 is to increase the flow velocity of the fluid within the first bundle of narrow tubes 3 by reducing the flow area and utilizing the Bernoulli principle of fluid dynamics. This increased flow velocity is then combined with a pressure differential to provide oxygenation.

[0032] In this embodiment, the outer wall of the first bundle of narrow tubes 3 abuts one end of the first threaded rod 8, while the other end of the first threaded rod 8 is threadedly connected to the wall of the irrigation pipe 1. A knob is provided on the outside of the first bundle of narrow tubes 3. By rotating this knob, the position of the first threaded rod 8 is adjusted, pushing the wall of the first bundle of narrow tubes 3 inward or outward, thereby changing the inner diameter of the first bundle of narrow tubes 3. For example, the inner diameter of the first bundle of narrow tubes 3 can vary between 10 mm and 20 mm to accommodate different flow and pressure requirements. This inner diameter adjustment function not only provides flexibility for irrigation with different water flow rates, but also provides a more stable pressure differential for the aeration pipe 6, helping to improve aeration efficiency.

[0033] In this embodiment, the wall of the irrigation pipe 1 is provided with openings at locations corresponding to the first bundle of narrow tubes 3. The outlet of the aeration pipe 6 passes through the opening in the wall of the irrigation pipe 1 and connects to the wall of the first bundle of narrow tubes 3. The inlet of the aeration pipe 6 is connected to an air pump or other gas supply device. When the fluid passes through the first bundle of narrow tubes 3, the low-pressure zone created by the increased flow rate causes external air to be rapidly drawn in and fully mixed with the fluid, thereby achieving a water oxygenation effect. The amount of oxygen added can be precisely controlled by adjusting the air supply pressure of the aeration pipe 6 and the inner diameter of the first bundle of narrow tubes 3 to meet the crop's demand for oxygen-containing irrigation.

[0034] In this embodiment, fluid enters the inlet of the irrigation pipe 1 and gradually transitions through the first reducer 13 to the first bundle of narrow pipes 3. Within the first bundle of narrow pipes 3, the fluid's flow rate increases due to the reduced flow area, while the pressure decreases. This creates a negative pressure in the low-pressure area of ​​the narrow pipe walls. The aeration pipe 6 injects external air or oxygen into this low-pressure area, where it mixes thoroughly with the rapidly flowing water, achieving efficient oxygenation of the water. After exiting the first bundle of narrow pipes 3, the fluid gradually transitions back to the regular section of the irrigation pipe through the first reducer 13, ensuring smooth outflow and even delivery to the irrigation area.

[0035] Reference Figure 1 As shown, in one embodiment, a second bundle of narrow tubes 11 with a variable inner diameter is provided inside the aeration tube 6, and both ends of the second bundle of narrow tubes 11 are connected to the inner wall of the aeration tube 6 through a second reducing tube 5. The outer tube wall of the second bundle of narrow tubes 11 is abutted with a second threaded rod 7, and the second threaded rod 7 is threadedly connected to the tube wall of the aeration tube 6 for changing the size of the inner diameter of the second bundle of narrow tubes 11.

[0036] In this embodiment, the aeration tube 6 is a cylindrical pipe, mainly used for transporting air. A second bundle of narrow tubes 11 with an adjustable inner diameter is provided inside the aeration tube 6 along the direction of fluid flow. The second bundle of narrow tubes 11 is connected to the inner wall of the aeration tube 6 through the second reducer 5 at both ends, so that the fluid channel of the second bundle of narrow tubes 11 section and the aeration tube 6 section are smoothly transitioned, and a fluid channel smaller than the inner diameter of the aeration tube 6 is formed. The outer tube wall of the second bundle of narrow tubes 11 abuts against one end of the second threaded rod 7, and the other end of the second threaded rod 7 is threadedly connected to the tube wall of the aeration tube 6, and a knob is provided on the outside. By rotating the knob, the position of the second threaded rod 7 is adjusted, and the wall surface of the second bundle of narrow tubes 11 is pushed inward or outward, thereby changing the inner diameter of the second bundle of narrow tubes 11.

[0037] In this embodiment, a second bundle of narrow tubes 11 is provided in the oxygenation tube 6. The second bundle of narrow tubes 11 is connected to the inner wall of the oxygenation tube 6 through the second reducers 5 at both ends to ensure a smooth transition of the gas from the conventional pipe section into the second bundle of narrow tubes 11. At the same time, the structure composed of the second bundle of narrow tubes 11 and the second reducer 5 can be regarded as a section of Venturi tube. Specifically, the second reducer 5 section can be regarded as the contraction section and diffusion section of the Venturi tube, and the second bundle of narrow tubes 11 section can be regarded as the throat section of the Venturi tube. In this way, based on the flow rate measurement principle of the Venturi tube, quantitative analysis of the gas increase and oxygen increase can be achieved. The gas flow rate is obtained and then combined with the inner diameter of the second bundle of narrow tubes to obtain the flow rate, and then the gas increase is obtained by multiplying the flow rate by the time.

[0038] In this embodiment, air enters the aeration tube 6 at its inlet, then flows through the second bundle of narrow tubes 11 and into the first bundle of narrow tubes 3. The air flow rate is calculated by measuring the pressure difference before entering the second bundle of narrow tubes 11 and within the second bundle of narrow tubes 11. This is then multiplied by the cross-sectional area of ​​the second bundle of narrow tubes 11 to obtain the flow rate, thereby determining the aeration rate. This process yields a first functional relationship between the cross-sectional area of ​​the second bundle of narrow tubes 11 and the theoretical aeration rate. After entering the first bundle of narrow tubes 3, the air mixes with the liquid. The oxygen content of the first bundle of narrow tubes 3 before and after air enters the first bundle of narrow tubes 3 is then measured to determine a second functional relationship between the cross-sectional area of ​​the first bundle of narrow tubes 3 and the actual aeration rate. By correlating the first and second functional relationships, a total functional relationship is obtained between the actual aeration rate and the cross-sectional areas of the first bundle of narrow tubes 3 and the second bundle of narrow tubes 11. Using this total functional relationship, irrigation personnel can directly adjust the sizes of the first and second bundles of narrow tubes 3, 11, to meet the crop's needs for aeration irrigation, providing greater precision.

[0039] In one embodiment, the oxygenation tube 6 is vertically connected to the first bundle of narrow tubes 3 .

[0040] In this embodiment, the outlet of the aeration tube 6 is perpendicularly connected to the first bundle of narrow tubes 3. This vertical connection does not affect the radial expansion or contraction of the first bundle of narrow tubes 3. This ensures that the position and effect of the air intake are not affected when the cross-sectional area of ​​the first bundle of narrow tubes 3 changes. Furthermore, vertical air intake helps evenly distribute the gas in the liquid.

[0041] In one embodiment, the outlet of the second bundle of narrow tubes 11 is arranged close to the first bundle of narrow tubes 3 .

[0042] In this embodiment, the outlet of the second bundle of narrow tubes 11 is located at the outlet of the aeration pipe 6. After passing through the second bundle of narrow tubes 11, the gas enters the diffuser section and then flows into the first bundle of narrow tubes 3. This avoids the pressure drop and energy loss caused by the excessive length of the aeration pipe 6. It also reduces the length of the aeration pipe 6, lowering manufacturing costs.

[0043] In one embodiment, a front test probe 12 is provided on the wall of the irrigation pipe 1 at the inlet of the first bundle of narrow tubes 3 , and a rear test probe 14 is provided on the wall of the irrigation pipe 1 at the outlet of the first bundle of narrow tubes 3 .

[0044] In this embodiment, the test probe may be a probe of an oxygen detector, which is used to detect the oxygen content of the first bundle of narrow tubes 3 before and after air intake, and the data obtained is used to obtain a functional relationship between the cross-sectional area of ​​the first bundle of narrow tubes 3 and the actual air increase rate.

[0045] In one embodiment, a first pressure gauge 2 is provided on the wall of the irrigation pipe 1 at the inlet of the first bundle of narrow tubes 3 , and a second pressure gauge 4 is provided on the wall of the first bundle of narrow tubes 3 at the inlet of the first bundle of narrow tubes 3 .

[0046] In this embodiment, the first pressure gauge 2 is arranged on the wall of the irrigation pipe 1 before the liquid enters the first bundle of narrow tubes 3. The second pressure gauge 4 is arranged on the wall at the inlet of the first bundle of narrow tubes 3. The first pressure gauge 2 and the second pressure gauge 4 measure the liquid pressure.

[0047] In one embodiment, a third pressure gauge 9 is provided on the wall of the aeration pipe 6 at the inlet of the second bundle of narrow tubes 11 , and a fourth pressure gauge 10 is provided on the wall of the second bundle of narrow tubes 11 at the inlet of the second bundle of narrow tubes 11 .

[0048] In this embodiment, the third pressure gauge 9 is installed on the wall of the oxygenation pipe 6 before the gas enters the second bundle of narrow pipes 11. The fourth pressure gauge 10 is installed on the wall at the inlet of the second bundle of narrow pipes 11. The third pressure gauge 9 and the fourth pressure gauge 10 measure the gas pressure.

[0049] In one embodiment, the inner diameter of the oxygenation tube 6 is smaller than the length of the first bundle of narrow tubes 3 .

[0050] In this embodiment, the inner diameter of the aeration tube 6 is smaller than the length of the first bundle of narrow tubes 3. This ensures that the flow rate of the fluid after entering the first bundle of narrow tubes 3 can be increased due to the reduction of the cross-sectional area of ​​the flow channel, while ensuring that the fluid flows in the irrigation pipe 1 in the correct direction.

[0051] In one embodiment, the first threaded rod 8 and the second threaded rod 7 are provided with a limit block, and the limit block is used to limit the movement stroke of the first threaded rod 8 and the second threaded rod 7.

[0052] In this embodiment, a limit block is provided to limit the size variation range of the first bundle of narrow tubes 3 and the second bundle of narrow tubes 11 to ensure normal use of the device.

[0053] In one embodiment, the oxygenation tube 6 is connected to the tube wall at the outlet of the first bundle of narrow tubes 3 .

[0054] In this embodiment, the outlet of the oxygenation pipe 6 is connected to the wall of the outlet of the first bundle of narrow tubes 3. After the gas enters the first bundle of narrow tubes 3, it can pass through quickly and enter the diffusion section to be fully mixed with the liquid.

[0055] During use, water flows through the irrigation pipe 1, where its pressure is measured by the first pressure gauge 2 and its oxygen content is measured by the front test probe 12. Water then flows through the first reducer 13 and into the first bundle of narrow tubes 3. Passing through the first reducer 13, the water's cross-section decreases, increasing its velocity and decreasing its pressure. When the water reaches the first bundle of narrow tubes 3, its velocity reaches its maximum and its pressure reaches its minimum, whereupon the pressure is measured by the second pressure gauge 4. Simultaneously, gas flows through the aeration pipe 6, passing through the second reducer 5 and the second bundle of narrow tubes 11. Based on the principle of the Venturi effect, the gas flow rate at different cross-sections of the second bundle of narrow tubes 11 is calculated, yielding a first functional relationship between the second bundle of narrow tubes 11 and the theoretical aeration rate. After entering the first bundle of narrow tubes 3, the gas mixes with water. The resulting mixture flows at high speed within the first bundle of narrow tubes 3 and continues into the diffuser section, where cavitation occurs, further fragmenting the bubbles. This creates a larger contact area between the air and water, improving aeration efficiency and increasing the oxygen content of the irrigation water. At this point, the oxygen content of the mixed liquid is measured using the post-test probe 14. The oxygen content of the water at different cross-sections of the first bundle of narrow tubes 3 is calculated, yielding a second functional relationship between the actual aeration volume and the first bundle of narrow tubes 3. By correlating the first and second functional relationships, a total functional relationship is obtained between the actual aeration volume and the cross-sectional areas of the first bundle of narrow tubes 3 and the second bundle of narrow tubes 11. Using this total functional relationship, irrigation personnel can directly adjust the sizes of the first and second bundles of narrow tubes 3, 11 to meet the crop's needs for oxygenated irrigation, providing greater precision.

[0056] The above description is only part or preferred embodiments of the present invention. Neither the text nor the drawings can limit the scope of protection of the present invention. All equivalent structural transformations made by using the contents of the present invention specification and drawings under the overall concept of the present invention, or direct / indirect application in other related technical fields are included in the scope of protection of the present invention.

Claims

1. A quantitative measurement device for oxygenation using the Venturi effect, characterized in that: include: An irrigation pipe having a first bundle of narrow tubes with a variable inner diameter, wherein both ends of the first bundle of narrow tubes are connected to the inner wall of the irrigation pipe via a first reducing pipe; the first bundle of narrow tubes is used to increase the flow rate of the fluid in the irrigation pipe; The wall of the first bundle of narrow tubes is connected to an oxygenation tube, and the oxygenation tube is used to add oxygen into the irrigation tube; The outer tube wall of the first bundle of narrow tubes is abutted with a first threaded rod, and the first threaded rod is threadedly connected to the tube wall of the irrigation tube for changing the size of the inner diameter of the first bundle of narrow tubes.

2. The quantitative measurement device for oxygenation using the Venturi effect according to claim 1, characterized in that: A second bundle of narrow tubes with a variable inner diameter is provided inside the aeration tube. Both ends of the second bundle of narrow tubes are connected to the inner wall of the aeration tube through a second reducing tube. A second threaded rod is abutted against the outer tube wall of the second bundle of narrow tubes. The second threaded rod is threadedly connected to the tube wall of the aeration tube for changing the size of the inner diameter of the second bundle of narrow tubes.

3. The quantitative measurement device for oxygenation using the Venturi effect according to claim 2, characterized in that: The oxygenation tube is vertically connected to the first bundle of narrow tubes.

4. The quantitative measurement device for oxygenation using the Venturi effect according to claim 3, characterized in that: The outlet of the second bundle of narrow tubes is arranged close to the first bundle of narrow tubes.

5. The quantitative measurement device for oxygenation using the Venturi effect according to claim 1, characterized in that: A front test probe is provided on the wall of the irrigation pipe at the inlet of the first bundle of narrow tubes, and a rear test probe is provided on the wall of the irrigation pipe at the outlet of the first bundle of narrow tubes.

6. The quantitative measurement device for oxygenation using the Venturi effect according to claim 1, characterized in that: A first pressure gauge is provided on the wall of the irrigation pipe at the inlet of the first bundle of narrow tubes, and a second pressure gauge is provided on the wall of the first bundle of narrow tubes at the inlet of the first bundle of narrow tubes.

7. The quantitative measurement device for oxygenation using the Venturi effect according to claim 4, characterized in that: A third pressure gauge is provided on the wall of the oxygenation pipe at the inlet of the second bundle of narrow tubes, and a fourth pressure gauge is provided on the wall of the second bundle of narrow tubes at the inlet of the second bundle of narrow tubes.

8. The quantitative measurement device for oxygenation using the Venturi effect according to claim 1, characterized in that: The inner diameter of the oxygenation tube is smaller than the length of the first bundle of narrow tubes.

9. The quantitative measurement device for oxygenation using the Venturi effect according to claim 2, characterized in that: The first threaded rod and the second threaded rod are provided with a limit block, and the limit block is used to limit the movement stroke of the first threaded rod and the second threaded rod.

10. The quantitative measurement device for oxygenation using the Venturi effect according to claim 1, characterized in that: The oxygenation tube is connected to the tube wall of the outlet of the first bundle of narrow tubes.

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