CN103644824A - Test device capable of accurately measuring spraying head rotation angle - Google Patents

Abstract

The invention relates to a test device capable of accurately measuring the rotation angle of a spray head, which includes a spray pipe and an installation standpipe. A positioning connecting sleeve is placed on the top, and a protractor is fixed on the side of the positioning connecting sleeve corresponding to the collar of the nozzle, and the arrow of the long pointer points vertically to the scale on the surface of the protractor. The invention has the advantages that the measuring device has a simple structure, is easy to replace, and has strong operability, so that the rotation angle of the nozzle can be accurately measured during the rotation of the nozzle.

Description

A test device capable of accurately measuring the rotation angle of the nozzle

technical field

The invention belongs to a key test device in the performance measurement of a sprinkler head in a water-saving irrigation sprinkler irrigation system, in particular to a test device capable of accurately measuring the rotation angle of a sprinkler head.

Background technique

Sprinkler irrigation is an advanced irrigation technology that has been widely used in agricultural irrigation all over the world in recent years. The sprinkler head is the key equipment that affects the quality of sprinkler irrigation. There are various types of nozzles, and rotary nozzles such as rocker nozzles and full-jet nozzles are widely used. The feature of this type of nozzle is that it does not rotate continuously during the rotation process, but is intermittently rotated by the driving force. During the rotation process of the nozzle, the step angle of the nozzle is an important parameter to measure the performance of the nozzle, which provides an important basis for the study of the driving force and structural improvement of the nozzle. However, in the existing measurement methods, the measurement of the step angle and rotation angle parameters of the nozzle has not been well resolved. Therefore, it is of great practical significance to develop a test device that can accurately measure the rotation angle of the nozzle.

After searching, there is no related literature report.

Contents of the invention

The purpose of the present invention is to provide a test device capable of accurately measuring the rotation angle of the nozzle, so that the rotation angle of the nozzle can be accurately measured during the rotation of the nozzle.

The technical solution adopted by the present invention is: a test device capable of accurately measuring the rotation angle of the spray head, including a spray pipe and an installation standpipe, the spray pipe is covered with a spray head ring, and a long pointer is fixed on the spray head ring. The installation standpipe is covered with a positioning connection sleeve, and the positioning connection sleeve is fixed with a protractor on the side surface corresponding to the nozzle collar, and the arrow of the long pointer points vertically to the scale on the surface of the protractor .

In the above solution, a distance of 2-3 mm is maintained between the arrow of the long pointer and the scale of the protractor.

In the above solution, the protractor is ring-shaped, and the scale setting method on the protractor is: 2 degrees is a small grid, 10 degrees is a medium grid, and 30 degrees is a large grid.

In the above solution, the goniometer and the positioning connecting sleeve are connected by threads.

In the above solution, a number of positioning holes b are provided on the side of the nozzle collar, and the connection between the nozzle collar and the nozzle is realized by the cooperation of the positioning holes b and screws.

In the above solution, several positioning holes a are provided on the side of the positioning connecting sleeve, and the connection between the positioning connecting sleeve and the installation standpipe is realized by the cooperation of the positioning holes a and screws.

The invention has the advantages that the measuring device has a simple structure, is easy to replace, and has strong operability, so that the rotation angle of the nozzle can be accurately measured during the rotation of the nozzle.

Description of drawings

Fig. 1 is a schematic diagram of the structure of the device of the present invention.

Fig. 2 is a cross-sectional view along line A-A in Fig. 1 .

Fig. 3 is a schematic diagram of the structure of the positioning connecting sleeve.

Fig. 4 is a schematic front view of the protractor.

Figure 5 is a top view of the protractor.

In the figure, 1. Positioning connection sleeve, 2. Protractor, 3. Long pointer, 4. Nozzle collar, 5. Nozzle, 6. External thread, 7. Positioning hole a, 8. Inner diameter, 9. Internal thread , 10. Positioning hole b, 11. Install the riser.

Detailed ways

As shown in Figures 1-5, the present invention includes a positioning connection sleeve 1, a protractor 2, a long pointer 3, a nozzle collar 4, a nozzle pipe 5, an external thread 6, a positioning hole a 7, an inner diameter 8, and an internal thread 9 , the positioning hole b 10 and the installation standpipe 11, wherein, the positioning connection sleeve 1 and the installation riser 11 are connected with the screws using the positioning hole a 7, the positioning holes a 7 are evenly distributed on the side of the positioning connection sleeve 1, and the positioning connection sleeve is maintained 1 is on the same center line as the installation standpipe; the inner diameter of the positioning connection sleeve 1 is slightly larger than the outer diameter of the installation standpipe, and the screw is adjusted so that the positioning connection sleeve 1 is fixed on the installation riser. The internal thread hole 9 of the protractor 2 is connected with the external thread 6 of the positioning connection sleeve 1, and the diameter of the internal thread hole 9 of the protractor 2 is equal to the diameter of the external thread 6 of the positioning connection sleeve 1; the circumference scale of the protractor 2 is 360 in total degrees, the scale line on the protractor 2 is 2 degrees for a small grid, 10 degrees for a medium grid, 30 degrees for a large grid, and the depth of the scale line is 0.3-0.5mm; the nozzle collar 4 is ring-shaped, and the nozzle sleeve The ring 4 and the nozzle nozzle 5 are connected by screws through the positioning holes b10, and the positioning holes b10 are evenly distributed on the side of the nozzle collar 4, and the nozzle collar 4 rotates together with the nozzle nozzle 5; the long pointer 3 and the nozzle collar 4 Welding, the long pointer 3 is perpendicular to the protractor 2, and the low end of the long pointer 3 is kept at a distance of 2-3 mm from the protractor 2, the purpose of which is to ensure accurate readings and no frictional resistance.

The working process is as follows: when measuring, as shown in Figure 1, connect the internal thread 9 of the protractor 2 with the external thread 6 of the positioning connection sleeve 1, and put it on the installation standpipe 11, and use the positioning hole a 7 and the screw for positioning . Different installation standpipes 11 can be connected by using different inner diameters 8 of positioning connection sleeves 1 . The nozzle collar 4 is connected with the nozzle nozzle 5 through the positioning hole b10 by a screw. During the rotation of the nozzle, the collar 4 rotates together with the nozzle. The long pointer 3 rotates together with the nozzle. Record the angle pointed by the arrow of the long pointer 3 when the nozzle rotates at the beginning. When the nozzle rotates through a certain angle or steps in a certain angle, the angle indicated by the protractor 2 corresponding to the arrow of the long pointer 3 can be read, and the step of the nozzle is completed. Measurement of advance angle or rotation angle.

Claims (6)

1. A test device capable of accurately measuring the rotation angle of the nozzle, comprising a nozzle pipe (5) and an installation standpipe (11), characterized in that the nozzle pipe (5) is covered with a nozzle collar (4), so The nozzle collar (4) is fixed with a long pointer (3), and the installation standpipe (11) is covered with a positioning connection sleeve (1), and the positioning connection sleeve (1) corresponds to the nozzle collar ( A protractor (2) is fixed on one side of 4), and the arrow of the long pointer (3) points vertically to the scale on the surface of the protractor (2). 2. A test device capable of accurately measuring the rotation angle of the nozzle according to claim 1, characterized in that the arrow of the long pointer (3) and the scale of the protractor (2) are kept at 2- 3mm distance. 3. A test device capable of accurately measuring the rotation angle of the nozzle according to claim 2, characterized in that the protractor (2) is ring-shaped, and the scale setting method on the protractor (2) is: 2 degrees is a small grid, 10 degrees is a medium grid, and 30 degrees is a large grid. 4. A test device capable of accurately measuring the rotation angle of the nozzle according to claim 2 or 3, characterized in that the protractor (2) is connected to the positioning connection sleeve (1) by threads. 5. A test device capable of accurately measuring the rotation angle of the nozzle according to claim 1, characterized in that, the side of the nozzle collar (4) is provided with several positioning holes b (10), and the nozzle collar (4) (4) The connection with the nozzle (5) is realized by the cooperation of the positioning hole b (10) and the screw. 6. A test device capable of accurately measuring the rotation angle of the nozzle according to claim 1, characterized in that, the side of the positioning connection sleeve (1) is provided with several positioning holes a (7), and the positioning connection sleeve (1) The connection with the installation riser (11) is realized by the cooperation of the positioning hole a (7) and the screw.

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