JPH01284355A - Automatic showering-type nozzle and water injection method using the same - Google Patents

Abstract

PURPOSE:To carry out economical cleaning over a wide area with sprinkled water by connecting an elbow, a hollow shaft, and a water supply pipe so that the nozzle is sectorially reciprocated and swung, and minutely oscillated and zigzagged in a plane vertical to the rotating shaft. CONSTITUTION:The pressurized water at about 5kgf/cm<2> is supplied at a rate of 50-150l/min to the water supply pipe of the many nozzles arranged at a specified position toward the wind at the time of injecting water to prevent the contamination and spark short-circuiting of an insulator due to salt dust in the typhoon, etc. In this case, the nozzle 10 is sectorially reciprocated and swung to the right and left at an angle of 120-150 deg. by a swinging motor 15 through a gear, and the water supply pipe 4 is oscillated around the horizontal shaft to a small angle of + or -10 deg. by a lever crank 8 driven by a motor 7. The movement of the water supply pipe 4 is transmitted to the hollow shaft 9 projecting at right angles to the pipe and communicating with the pipe, the elbow 11 with the tip having an elevation angle, and the nozzle 10, and a specified water screen is formed by the sprinkled water.

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an automatic rain nozzle used for cleaning insulators in electrical stations such as switchyards and substations, and a water injection method using the same. .

(Conventional technology) At power distribution stations and substations, in order to prevent salt dust contamination and flashing of insulators caused by salt-laden wind blowing from the sea side during typhoons, etc., conventional methods have been used to A number of automatic rain nozzle devices are installed on the upper side. Such conventional nozzle devices have a water pipe installed on the windward side, and nozzles are placed on this water pipe perpendicularly to the ground at intervals of about 2.5 square meters. Water is sprayed almost vertically to form a water curtain for typhoon protection, diluting the salt and cleaning the insulators through the rain washing effect.

However, in such conventional devices, water is sprayed almost directly upward from the nozzle, so the water flow is not scattered over a wide area unless the wind is strong, and the rain washing effect is not achieved in weak winds. In addition, in order to obtain a rain washing effect even during weak winds, it is possible to place the nozzle diagonally towards the top of the insulator device, forming a water curtain on the top of the device.
There were drawbacks such as an increase in the amount of water injected into the insulator device, resulting in a decrease in withstand voltage performance and the need for a large amount of water.

(Problem B to be Solved by the Invention) The present invention solves these conventional problems and enables economical water injection by distributing water over a wide area even in weak winds to objects to be watered, such as insulator devices. It was completed with the aim of creating an automatic rain nozzle that can perform water injection, and a water injection method using this nozzle.

(Means for Solving the Problems) A first invention made to achieve the above problems supports a water pipe into which pressure water is supplied so as to be swingable at a small angle around a horizontal axis, and A hollow shaft that communicates with this water pipe is installed at a right angle to the water pipe, and an elbow and a nozzle with an elevation angle at the tip are attached to this hollow shaft.The structure allows for reciprocating rotation around the hollow shaft. The second invention is characterized in that the tips of the nozzles installed at a required interval on the windward side of the object to be watered are rotated while reciprocating in a diagonally upward fan shape. It is characterized by finely zigzag swinging in a plane perpendicular to the axis to inject water dispersed over a wide range.

(Examples) Next, the present invention will be described in more detail with reference to illustrated examples.

1 and 2 show an embodiment of the first invention,
(1) is the frame, (2) is a connection flange that also serves as a bearing provided on this frame (1), (3) is a bearing provided at the same height as this, and (4) is a connection flange ( The water pipe (4) is rotatably supported by the water pipe (2), and pressurized water is supplied from the outside to the inside of the water pipe (4). The extension shaft (5) of the water pipe (4) is supported by a bearing (3), and an arm (6) extending downward from this extension shaft (5) is driven by a motor (7) at the bottom of the frame (1). Since the water pipe (4) is connected to the lever crank mechanism (8) which is driven by the lever, when the motor (7) is rotated, the water pipe (4) is connected to the connecting flange (2) together with its extension shaft (5).
) and the hair ring (3) around the horizontal axis.
It will oscillate by a small angle of about .

This water pipe (4) has a hollow shaft (9) projecting at right angles and communicating therewith. The hollow shaft (9) has an elbow αD whose tip has an elevation angle of approximately 500 degrees, and a nozzle (
11 is mounted so that it can freely rotate around a hollow shaft (9). A gear α1 is provided on the outer periphery of the base side of this hollow shaft (9), and the water pipe (4) and the extension shaft (
5) It meshes with a gear Ql of a rotating motor α which is capable of forward and reverse rotation and is attached to a bracket (manufactured by Co., Ltd.) hanging from the shaft. Therefore, if these rotation motors α are rotated forward and backward, the hollow shaft (9) will perform reciprocating rotation around its axis, and the nozzle α attached to the elbow a0, which has an elevation angle at its tip, will be rotated diagonally upward. It can be rotated back and forth in a fan shape. The rotation angle is determined by the α force of the two limit switch cams protruding from the outer periphery of the base of the hollow shaft (9), α
η, a limit switch a1 supported above it via a bracket α, and α. It is preferable to set the turning angle of the nozzle Ql within the range of about 120° to 150°. Note that ■ indicates that the balance way l-1 (21) provided on the lower surface of the hollow shaft (9) is connected to the water pipe (4).
) is a balance weight provided at the rear, and (22) is a control box.

(Function) The automatic rain nozzle configured in this way is placed at a position on the windward side of the object to be injected with water, such as an insulator device at a power distribution station or substation, at an interval approximately twice the required upward reach distance, that is, the necessary upward reach distance. When the distance is 3.5-, a large number of pipes are arranged at intervals of about 7-8 m, and pressure water of about 5 kgf/- is supplied to the water pipe (4) at a rate of 50-15 H!/min. At this time, the nozzle α is reciprocated at an angle of 120 to 150° while drawing a fan shape to the left and right through the gears aυ and gear α by the rotation motor α. Water is injected so that there are no gaps between adjacent nozzles, and the water pipe (4) itself is rotated around the horizontal axis by a ±100 degree angle using a lever crank mechanism (8) driven by a motor (7). As a result, the nozzle oscillates in a fine (zigzag) manner in a plane perpendicular to the rotation axis while reciprocating in a fan-shaped manner.
For example, the water stream discharged from the nozzle al is dispersed over a wide range based on the same principle that when watering with a hose, the water stream is dispersed by shaking the tip of the hose finely. It is preferable that the period of the reciprocating movement in the left and right direction is about 6 reciprocations per minute, and the period of the fine zigzag movement is about 1 second to 1.5 seconds.If the period of the reciprocating movement is too fast, the water flow The phenomenon in which the particles fluctuate in a direction that lags behind the direction of the nozzle Ql becomes stronger, making it impossible to obtain uniform dispersion.

On the other hand, if the cycle is too slow, the gap between the water flow from the nozzle 01 in contact with liJ becomes large, and salt dust cannot be sufficiently prevented from flowing through this gap.

As described above, according to the present invention, it is possible to form a uniform water curtain with excellent dispersibility on the side and top surfaces of an object to be watered, such as an insulator device. You can sometimes get a rain washing effect. Furthermore, according to the present invention, the dispersibility of the water discharge can be improved, so the amount of water discharged per unit time required to ensure the desired rain washing effect can be reduced.

Figure 3 is a graph showing the dispersibility of the water discharge according to the present invention. When water is discharged vertically at a wind speed of 5 m/3, concentrated water is sprayed within a range of 7 to 17 m from the nozzle. However, in the case of the present invention, the distance is 1 m to 4 m from the nozzle.
Water is injected with excellent dispersibility over a wide range of 0-
In addition, the water droplet particle diameter is 0.3 to 1.0 fins in the case of vertical water discharge, whereas it is 0.1 to 1.0 fins in the case of the present invention. Qm
It can be seen that the particles become atomized.

FIG. 4 is a graph showing the relationship between the nozzle elevation angle and the water spray height. - For boat fishing insulator devices, the required water discharge height is 3
．． 5-, the elevation angle of the nozzle needs to be larger than 35-40#, as shown in the figure.
It can be seen that it is preferable to oscillate within a range of 40° or 40° to 60°.

(Effects of the Invention) As is clear from the above description, the present invention is applicable to a wide range of water injection targets such as insulator devices in electrical stations such as switchyards and substations, not only in strong winds but also in weak winds. It is possible to inject water with excellent dispersion, and it also reduces the amount of water sprayed per unit time required to ensure the desired rain washing effect.
Economical water injection can be performed. Therefore, the present invention is applicable to fields such as forming water curtains to prevent salt damage in insulators, forming fire curtains to protect transformers and other dangerous objects, and agricultural watering equipment, which require small amounts of water and wide-area watering using the behavior of the wind. As a suitable material for industrial use, it has an extremely large potential to contribute to the development of industry.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway front view showing an embodiment of the present invention, Fig. 2 is a partially cutaway right side view thereof, Fig. 3 is a graph showing the dispersion of water discharge, and Fig. 4 is a graph showing the elevation angle of the nozzle. It is a graph showing the relationship with the water discharge height. (41: Water pipe, (9); Hollow shaft, (+1: /Zuru, a*:, C report. Patent applicant: Nippon Insulator Co., Ltd. Agent Name: Akira Shima Buma
Watanuki Tatsu circling
Fumi Yamamoto Figure 1 Figure 4 Elevation angle of the nozzle from the ground (degrees)

Claims (1)

[Claims] 1. A water pipe (4) into which pressurized water is supplied is supported so as to be swingable at a small angle around a horizontal axis, and a hollow shaft (9) communicating with the water pipe (4) is supported. ) is provided protruding at right angles to the water pipe (4), and an elbow (10) and a nozzle (10) having an elevation angle at the tip are attached to this hollow shaft (9).
9) An automatic rain nozzle characterized by having a structure capable of reciprocating rotation around its axis. 2. The tips of the nozzles installed at the required intervals on the windward side of the water injection target are rotated back and forth in a diagonally upward fan shape while oscillating in a fine zigzag pattern in a plane perpendicular to the rotation axis. A water injection method characterized by performing water injection dispersed over a wide area.