Method for rapidly determining the position of a water intake nozzle for generating a signal for a sprinkler system - Patents.com

Abstract

The present invention is a method for quickly determining the position of the signal-generating water intake nozzle of a sprinkler device. The sprinkler device includes a bolt, a signal-generating water intake nozzle, an outlet cover plate, a spray body, a water tank, a scale line, a conduit, and a water inlet. First, at the critical point where the signal-generating water intake nozzle is completely separated from the outlet cover plate, a reference position of the signal-generating water intake nozzle is determined, and a reference line corresponding to the upper end of the outlet cover plate is drawn. The signal generating water intake nozzle is adjusted so that the water intake area S1 becomes a certain value, the connection between the conduit and the water intake port is disconnected, the time t1 from when the water for signal generation starts to enter the water tank until it becomes full is recorded, the flow coefficient μ of the water for signal generation of the sprinkler device is calculated, the water intake area of ​​the water intake nozzle for signal generation of the sprinkler device is calculated based on the expected direct spray time T of the sprinkler device, m equal scale lines are drawn on the outlet cover plate and scaled in order, and it is confirmed that the reference line of the water intake nozzle for signal generation corresponds to the xth scale line on the cover plate, thereby optimizing the position of the water intake nozzle for signal generation of the sprinkler device.

Description

Technical Field

[0001] The present invention relates to a method for optimizing the structure of a sprinkler device, and particularly to a method for quickly determining the position of a water intake nozzle for signal generation of a sprinkler device.

Background Art

[0002] A sprinkler device is a water-saving irrigation device widely used in agricultural irrigation. The stable operating state of the sprinkler device during operation is a state where the speed during the rotation of the spray head is appropriate, the spray distance is good, and the spray is uniform throughout the circumference. In a sprinkler device, when the water intake of the water intake nozzle for signal generation is large, the direct injection time of the spray head becomes short, the rotation speed becomes fast, the spray distance becomes short, and the effect of good uniformity is brought about. When the water intake of the water intake nozzle for signal generation of the sprinkler device is small, the direct injection time of the spray head becomes long, the rotation speed becomes slow, the spray distance becomes long, and the effect of poor uniformity is brought about. Currently, the position of the water intake nozzle for signal generation of the sprinkler device is mainly designed based on experience, that is, mainly observing the direct injection time, rotation speed, spray distance, and spray uniformity of the spray head, and it is impossible to accurately optimize the design of the direct injection time, rotation speed, spray distance, and spray uniformity of the sprinkler device to achieve stable operation of the spray head, nor can the important hydraulic performance affected by the position of the water intake nozzle for signal generation be accurately grasped. Under special circumstances, when the sprinkler device cannot complete stable operation or the important hydraulic performance deteriorates, it is impossible to analyze whether it is caused by the position of the water intake nozzle for signal generation, so this scientific problem cannot be effectively solved.

[0003] As described above, in the design process, since the position of the water intake nozzle for signal generation of the current sprinkler device cannot be optimized, when the important hydraulic performance of the sprinkler device deteriorates, it is impossible to control the direct injection time, rotation speed, spray distance, and spray uniformity of the spray head by scientifically setting the position parameters of the water intake nozzle for signal generation. Therefore, in order to solve the above problems, the present invention proposes a method for quickly determining the position of the water intake nozzle for signal generation of the sprinkler device.

[0004] As a result of the search, there are no related patents at present.

Summary of the Invention

Problems to be Solved by the Invention

[0005] In order to ensure the accuracy of the direct injection time of the sprinkler during rotation operation, the present invention provides an optimization method for determining the position of the water intake nozzle for signal generation of the sprinkler. According to the method proposed by the present invention, an operator can quickly adjust the position of the water intake nozzle for signal generation to a desired appropriate position, thereby achieving the expected direct injection time during the spraying of the sprinkler.

Means for Solving the Problems

[0006] The present invention achieves the above technical objectives by the following technical means.

[0007] A method for quickly determining the position of the water intake nozzle for signal generation of a sprinkler. The sprinkler includes a bolt, a water intake nozzle for signal generation, an outlet cover plate, a spraying body, a water storage tank, a scale line, a conduit, and a water inlet. The volume of the water storage tank is W, the inner diameter of the conduit is r, and the length is l. The method includes the following steps (a) to (h).

[0008] In step (a), the outlet cover plate is fixedly connected to the spraying body by screwing through a threaded hole, the water intake nozzle for signal generation and the spraying body are tightened with bolts to fix the position of the water intake nozzle for signal generation, the connection position of the water intake nozzle for signal generation is fixed by a lock nut a, the water intake nozzle for signal generation is installed outside the vertical position of the outlet cover plate, and the radial relative position between the water intake nozzle for signal generation and the outlet cover plate is adjustable with bolts. The water intake shape of the water intake nozzle for signal generation can be set to any shape such as a quadrilateral, a triangle, a star shape, a circle, an ellipse, etc.

[0009] In step (b), the rated operating pressure H of the sprinkler device is set so that the water intake nozzle for signal generation can take in the water for signal generation. Loosen the lock nut a and the bolt, and move the water intake nozzle for signal generation until it reaches the critical point where it is completely separated from the outlet cover plate, that is, until the spray head is at the operating pressure H and the water intake nozzle for signal generation reaches the critical position where it cannot take in the water for signal generation. Since the water for signal generation is not obtained, the sprinkler device cannot complete the rotation operation. Tighten the bolt to determine the reference position outside the water intake nozzle for signal generation, that is, draw a reference line corresponding to the outside of the water intake nozzle for signal generation at the upper end of the outlet cover plate. The fact that the reference position corresponds to the reference line indicates that the water intake nozzle for signal generation is at the set position 0.

[0010] In step (c), loosen the lock nut a and the bolt, adjust the water intake nozzle for signal generation so that it can take in the water for signal generation, and adjust the installation position of the water intake nozzle for signal generation corresponding to the outlet cover plate so that the water intake area S 1 of the water intake nozzle for signal generation reaches a certain value. Tighten the bolt and the lock nut a to fix the installation position of the water intake nozzle for signal generation so that the water intake area S 1 does not change during the operation of the spray head.

[0011] In step (d), set the rated operating pressure H of the sprinkler device so that the sprinkler device maintains a stable operating state. If the sprinkler device cannot maintain a stable operating state, repeat the above step (c). The stable operating state of the sprinkler device is a state where the rotation speed of the spray head is appropriate, the spray distance is good, and the spray is uniform over the entire circumference. Considering that the sprinkler device may fluctuate and be unstable immediately after the start of operation, it is necessary to measure the flow rate of the water for signal generation of the spray head after it has been operating stably for 10 minutes or more at the set operating pressure of the spray head.

[0012] In step (e), disconnect the connection between the conduit and the water intake, pump up the water for signal generation while maintaining the sprinkler device in the direct spray state, and measure the time t 1Record it, and when the sprinkler device has a water intake area S 1 calculate the water flow rate Q for signal generation of the spray head per unit time 1 =W / t 1 calculate it. Calculate the water flow coefficient μ for signal generation of the sprinkler device by the following formula JPEG0007679127000001.jpg37129

[0013] Based on the predicted direct injection time T of the assumed sprinkler device, optimize the position of the water intake nozzle for signal generation of the sprinkler device.

[0014] In step (g), according to the water intake shape set for the water intake nozzle for signal generation and the length dimension of the relative position in the radial direction between the water intake nozzle for signal generation and the outlet cover plate, from the reference line at the upper end of the outlet cover plate, use the mathematical formula corresponding to the set water intake shape to calculate the positions of the scale lines that equally divide the water intake area, draw m scale lines on the outlet cover plate, and equally divide the water intake area of the water intake nozzle for signal generation into m parts. The m drawn scale lines are one or more. Calculate the water intake area of the water intake nozzle for signal generation of the sprinkler device by the following formula JPEG0007679127000003.jpg28163

[0015] When the lock nut a is tightened to fix the installation position of the water intake nozzle for signal generation, the predicted direct injection time T in step (f) can be obtained, so the position of the water intake nozzle for signal generation of the sprinkler device can be easily determined.

Advantages of the Invention

[0016] The present invention has the following beneficial effects. 1. The optimization method for the position of the water intake nozzle for signal generation of the sprinkler device according to the present invention mainly optimizes the position of the water intake nozzle for signal generation of the sprinkler device, has good effects, and the deviation between the measured direct injection time and the predicted direct injection time after determining the position of the water intake nozzle for signal generation of the sprinkler device is within 10%. 2. The optimization method for the position of the water intake nozzle for signal generation of the sprinkler device according to the present invention has the advantages that by combining the reference line and the scale line for use, the operation is simple and rapid, the accuracy is high, and the optimal position of the water intake nozzle for signal generation of the sprinkler device can be determined at low cost.

Brief Description of the Drawings

[0017]

Figure 1

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Embodiments for Carrying Out the Invention

[0018] Hereinafter, the implementation of the technical means in the embodiments of the present invention will be specifically described with reference to the accompanying drawings in the embodiments of the present invention. However, these embodiments are not all embodiments, but some embodiments for facilitating the description of the present invention, and should not be construed as limiting the present invention. A method for quickly determining the position of the water intake nozzle for signal generation of the sprinkler device will be described in detail below.

[0019] The operating principle of the sprinkler device includes completing the rotational operation of the spray head in two states: direct injection and wall adhesion. The operating process is as follows.

[0020] In the direct injection state, water flows out from the outlet of the outlet cover plate 5, forming low-pressure vortex regions at both the left and right ends of the spray body 6. The water intake nozzle 4 for signal generation obtains the water for signal generation from the outside of the outlet of the outlet cover plate 5. When the water tank 10 for signal generation is filled with the obtained water for signal generation, the water for signal generation flows from the water intake port 9 through the conduit 12 to the water inlet 13 of the spray head. At this time, the pressures on both the left and right sides of the spray body are approximately equal, the main jet is in the direct injection state, and the spray head is stationary.

[0021] In the wall attachment state, the water for signal generation taken out by the water intake nozzle 4 for signal generation flows into the water inlet 13 of the spray head through the water tank 10 and the conduit 12, forming a low-pressure vortex region on the right side, creating a pressure difference between the left and right sides of the spray body. The pressure on the left side is higher than that on the right side. The main jet adheres to the right wall, and the water flow generates a pressing force on the spray body 6 due to the chamfering of the outlet cover plate 5, causing the spray head to rotate step by step to the right to complete the rotation operation. At this time, since the water flow adheres to the right wall, the water flow is deflected to the left at the outlet due to the chamfering of the outlet cover plate 5, and the water intake nozzle 4 for signal generation is empty and cannot take in the water for signal generation, only taking in air.

[0022] In the state where the main jet adheres to the wall, the water for signal generation in the water tank 10 and the conduit 12 is quickly pumped out. After the water for signal generation in the water tank 10 is pumped out, air enters through the air supply hole b8, and the pressures on both the left and right sides of the spray body become equal, and the main jet returns to the direct injection state. By repeating this automatic control of the sprinkler device, the operations of direct injection - step rotation - direct injection -... are completed, realizing the rotation operation of full-circle spraying.

[0023] The important structural parameters of the sprinkler device for achieving full-circle spraying include the position of the water for signal generation, the volume W of the water tank, the inner diameter r and the length l of the conduit. The rotation speed of the sprinkler device mainly depends on the direct injection time and the wall attachment time. However, in the actual operation process, in the wall attachment state, the pressure difference between the left and right sides of the main jet is large, the speed of the water for signal generation is fast, and the wall attachment time is very short and can be ignored. Therefore, it is considered that the rotation speed of the sprinkler device is mainly determined by the direct injection time.

[0024] As shown in Fig. 1, the volume W of the water storage tank (10) is 15 ml, the inner diameter r of the conduit (12) is 4 mm, and the length l is 150 mm. The water intake shape of the water intake nozzle (4) for signal generation is set to a rectangle of 2 mm × 10 mm. The rated operating pressure H of the sprinkler device is set to 0.2 MPa, and the critical position where the water intake nozzle (4) for signal generation cannot take the water for signal generation is adjusted. At this time, a reference line indicating the installation position 0 degrees is drawn on the outer side of the water intake nozzle (4) for signal generation and the upper end of the outlet cover plate (5). The water intake nozzle (4) for signal generation is adjusted so that it can take the water for signal generation, and the installation position of the water intake nozzle (4) for signal generation corresponding to the outlet cover plate (5) is adjusted so that the water intake area position becomes 2 mm × 7 mm, whereby the water intake area S 1 is 14 mm 2 and the bolts (1) and lock nuts a (2) are tightened to fix the installation position of the water intake nozzle (4) for signal generation. The operating pressure of the spray head is set to 0.2 MPa, that is, set to a 20-meter head, and the sprinkler device maintains a stable operating state. After operating stably for 20 minutes, the connection between the conduit (12) and the water intake port (9) is disconnected, and the time t 1 from when the water for signal generation starts to enter the water storage tank (10) until it is full is measured to be 1.5 s, and the flow rate Q 1 of the water for signal generation of the spray head per unit time is calculated to be 10 ml / second. The flow coefficient μ of the water for signal generation of the sprinkler device is calculated to be 0.0357.

[0025] JPEG0007679127000005.jpg106164

[0026] As shown in the above table, in the method for quickly determining the position of the water intake nozzle for signal generation of the sprinkler device proposed by the present invention, the deviation between the actually measured direct injection time and the predicted direct injection time is within 10%. Therefore, the present invention has advantages such as being simple and quick to operate, having high accuracy, and being able to optimize the position of the water intake nozzle for signal generation of the sprinkler device at low cost.

[0027] The above-described embodiments are preferred embodiments of the present invention and merely explain the technical idea of the present invention. The present invention is not limited to the above embodiments, and any obvious improvements, substitutions, or modifications that can be made by those skilled in the art without departing from the technical idea and essential content of the present invention are all included in the protection scope of the present invention.

Explanation of Reference Numerals

[0028] 1. Bolt, 2. Lock nut a, 3. Lock nut b, 4. Water intake nozzle for signal generation, 5. Outlet cover plate, 6. Spray body, 7. Air supply hole a, 8. Air supply hole b, 9. Water intake, 10. Water storage tank, 11. Scale line, 12. Conduit, 13. Inlet, 14. Threaded hole.

Claims

1. 1. A method for quickly determining the position of a water intake nozzle for generating a sprinkler signal, comprising: The water sprinkler mainly includes a bolt (1), a water intake nozzle (4) for generating a signal, an outlet cover plate (5), a spray body (6), a water storage tank (10), a scale line (11), a conduit (12), and a water inlet (13); The method for determining the position of the water intake nozzle for generating a signal comprises: Step (a): the outlet cover plate (5) is fixedly connected to the spray body (6) by screwing through the screw hole (14), the signal-generating water intake nozzle (4) and the spray body (6) are fastened with a bolt (1) to fix the position of the signal-generating water intake nozzle (4), and the connection position of the signal-generating water intake nozzle (4) is fixed with a lock nut a (2), the signal-generating water intake nozzle (4) is installed outside the vertical position of the outlet cover plate (5), and the radial relative position of the signal-generating water intake nozzle (4) and the outlet cover plate (5) can be adjusted with the bolt (1); Step (b) of setting the rated working pressure H of the sprinkler device so that the signal-generating water intake nozzle (4) can take the signal-generating water, loosening the lock nut a (2), loosening the bolt (1), and moving the signal-generating water intake nozzle (4) to a critical point where the signal-generating water intake nozzle (4) is completely separated from the outlet cover plate (5), i.e., to a critical position where the signal-generating water intake nozzle (4) cannot take the signal-generating water when the spray head is at the working pressure H, and tightening the bolt (1), and determining a reference position outside the signal-generating water intake nozzle (4), i.e., drawing a reference line corresponding to the outside of the signal-generating water intake nozzle (4) on the upper end of the outlet cover plate (5), and the reference position corresponding to the reference line indicates that the signal-generating water intake nozzle (4) is at the set position 0; Loosen the lock nut a (2), loosen the bolt (1), adjust the water intake nozzle (4) for signal generation so that it can take in water for signal generation, and adjust the water intake area S of the water intake nozzle (4) for signal generation. １ The installation position of the water intake nozzle (4) for generating a signal corresponding to the outlet cover plate (5) is adjusted so that the water intake area S during the operation of the spray head is １ (c) fastening the bolt (1) and the lock nut a (2) to fix the installation position of the water intake nozzle (4) for generating a signal so that the position does not change; Step (d) of setting a rated operating pressure H of the sprinkler system so that the sprinkler system maintains a stable operating state, and repeating step (c) if the sprinkler system cannot maintain a stable operating state; The conduit (12) is disconnected from the water intake (9), and the water for signal generation is pumped up while the sprinkler is maintained in a direct injection state. The time t from when the water for signal generation starts to enter the water storage tank (10) until the tank is full is measured. １ The water intake area S of the sprinkler system is recorded. １ The water flow rate Q for generating a signal for the spray head per unit time in the case １ = W / t １ Calculate the water flow coefficient μ for generating a signal for the sprinkler device using the following formula:

2. 2. A method for quickly determining the position of a water intake nozzle for generating a signal for a sprinkler system, as claimed in claim 1, characterized in that the volume of the water tank (10) is W, the inner diameter of the conduit (12) is r and its length is l.

3. 2. The method for quickly determining the position of a water intake nozzle for generating a signal of a sprinkler device as described in claim 1, characterized in that the water intake shape of the water intake nozzle for generating a signal (4) can be set to any one of a square, a triangle, a star, a circle, and an ellipse.

4. The method for quickly determining the position of a water intake nozzle for signal generation of a sprinkler device as described in claim 1, characterized in that the stable operating state of the sprinkler device is a state in which the rotation speed of the spray head is appropriate, the spray distance is good, and the spray is uniform all around.

5. The method for quickly determining the position of the water intake nozzle for generating a signal of a sprinkler device as described in claim 1, characterized in that the water flow rate measurement for generating the signal of the spray head is performed after the spray head has been operated stably for 10 minutes at the set operating pressure of the spray head.

6. 2. The method for quickly determining the position of a water intake nozzle for generating a signal of a sprinkler system according to claim 1, characterized in that the number of equally divided m scale lines is one or more.

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