JPH0698322B2 - Snow removal nozzle - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a snow removal nozzle mainly used for snow removal on a road.

[Conventional technology]

The snow-melting nozzle is not practical unless it has a water flow control valve that can control the amount of water spray. Therefore, various water control valves have been developed.

Some of them are listed below.

a) A type in which a valve seat, which is larger in diameter than the water passage hole and entirely closes the water passage hole, is provided at the upper part of the water passage hole so as to be able to move up and down.

b) A type in which an elevating rod for raising and lowering is provided in the valve cylinder, a lateral hole is provided in the middle of the valve cylinder, and this lateral hole is opened and closed by elevating the elevating rod at the lower end of the elevating rod.

c) A type in which the inner valve pair is provided in a slidable state so as to be rotatable with respect to the outer valve body, and one valve side hole is opened and closed by one rotation.

d) A type in which the lower end of the valve rod is inserted into the water passage hole and a water passage is formed at the lower end of the valve rod.

and so on.

[Problems to be Solved by the Invention]

In the case of type a) above, the valve seat is cantilevered when opened, so the threaded portion is apt to become loose, and it is not used durable.
The rectification effect inside the cavity is not good. The b) type requires two parts, a valve cylinder and an elevating rod, which is cumbersome to manufacture and costly. Moreover, the rectifying action is poor and a special rectifying device is required.

Also, since the screwing structure is doubled, it is more easily damaged and is not used durable.

The c) type also has a two-part configuration of an outer valve body and an inner valve pair, which is difficult to manufacture and costly, and it is difficult to make a sliding contact and a rectifying action cannot be expected.

In the d) type, rubber is easily clogged, and the rectifying action is poor, so that a special rectifying device is required.

The applicant has begun research on a water flow control valve that solves these drawbacks, and various products have been prototyped and tested, and as a result, the product of the present invention has been completed.

[Means for Solving the Problems]

 The configuration will be described in detail with reference to the accompanying drawings.

Nozzle body 3 having cavity 2 on top of water pipe connection tube 1
In the snow-melting nozzle in which the water spray holes 4 are formed in the upper wall portion of the nozzle body 3, a screw hole 5 is provided at the center of the upper wall portion of the nozzle body 3, and the valve rod 6 is moved up and down in the screw hole 5. It is freely screwed, and a perfect circular hole 7 is formed at the center of the partition wall 11 in the upper part of the water pipe connecting cylinder 1, and a tapered peripheral surface 8 having a smaller diameter is formed in the middle of the valve rod 6, and this taper is formed. Water passage below the peripheral surface 8
A perfect circular rod 9 which fits tightly into the perfect circular hole 7 is laid down via 17 and a water cutout groove 10 is vertically provided at several positions on the outer circumferential surface of the perfect circular rod 9. A snow-melting nozzle characterized in that a tapered peripheral surface 8 is brought into contact with a corner edge 7 ′ of the perfect circular hole 7 and a perfect circular rod 9 is fitted into the perfect circular hole 7 to stop water spraying. It is related.

[Action]

When the valve rod 6 is screwed in, the tapered peripheral surface 8 is pressed against the corner edge 7'of the perfect circular hole 7, and the water flow is completely cut off.

When the valve rod 6 is rotated in the opposite direction and lifted up, a gap is created between the tapered peripheral surface 8 and the corner edge 7'of the perfect circular hole 7 to allow water to pass. Will be done.

At this time, water (more than twice as much groundwater) ascends through the water cutout 10 provided in the perfect circular rod 9 of the valve rod 6 and passes through the water passage gap 17 that is recessed in the circumferential direction at the upper part of the perfect circular rod 9. Water is sent to the cavity portion 2 of the nozzle body 3 along the tapered peripheral surface 8 and is sprayed from the fountain holes 4, but since the water overflows into the cavity portion 2 along the tapered peripheral surface 8, the cavity portion 2 A rectification phenomenon occurs in the inside, and in particular, ascending water flows along the water cutout portion 10, and then is introduced into the cavity portion 2 along the tapered peripheral surface 8 through the water passage gap 17, so that the cavity portion 2 is further formed. The flowing water has a uniform water pressure due to the rectification phenomenon in the whole area, and is sprayed on average from any of the fountain holes 4.

〔Example〕

The drawing shows an embodiment of the present invention, in which a water pipe connecting tube 1
In the snow removal nozzle in which the nozzle body 3 having the cavity portion 2 is continuously provided on the upper part of the above, and the water spray hole 4 is formed in the upper wall portion of the nozzle body 3, the screw hole 5 is provided at the center of the upper wall portion of the nozzle body 3. A valve rod 6 is screwed up and down in the screw hole 5, and a perfect circular hole 7 is formed in the upper part of the water pipe connecting cylinder 1 at the center of the partition wall 11. The lower part of the valve rod 6 has a small diameter in the middle. To form a tapered peripheral surface 8
Below this tapered peripheral surface 8, a perfect circular rod 9 which fits tightly into the perfect circular hole 7 is hung vertically with a water passage gap 17 interposed therebetween, and several places on the outer circumferential surface of the perfect circular rod 9 are provided. Water notch groove 10 up and down
Is provided, and the tapered peripheral surface 8 is brought into contact with the corner edge 7 ′ of the perfect circular hole 7 and the perfect circular rod 9 is fitted into the perfect circular hole 7 to stop watering.

The water passage groove 12 may be formed in the perfect circular rod 9 as shown in FIG. 3 by reversing the relationship between the water notch groove 10 and the perfect circular rod 9.

In the figure, reference numeral 13 is a threaded portion, 14 is a retaining ring, 15 is packing,
16 is a fountain inlet, 18 is a water pipe, and 19 is an O-ring.

〔The invention's effect〕

Since the present invention is configured as described above, it is a simple and inexpensive snow-melting nozzle that exhibits the following excellent features over the conventional water amount control valve.

Since it is a one-part style water flow control valve consisting of one valve rod, it is easy to manufacture and the cost is low.

The taper circumferential surface abuts on the square circle of the water supply hole (round hole) to close the water passage gap by raising and lowering the valve rod. The contact between the taper circumferential surface and the corner edge of the true circular hole is opened and closed. Since it is a water volume control valve, it becomes a water volume control valve that can finely control and completely shut off the water volume, making it a snow-melting nozzle with excellent practicality.

Since the perfect circular rod is closely fitted to the perfect circular hole, the threaded portion of the valve rod does not loosen, and the water amount adjusting valve can be used so durable.

The water flow passes through the water passages provided in the circumferential direction, hits the entire circumference of the tapered peripheral surface, and flows into the cavity (cavity part). It becomes a uniform water pressure, and it becomes a snow-melting nozzle with an extremely excellent flow-rectifying effect that water is evenly sprayed from any fountain hole.

In particular, by selecting the design of the shape of the water cutout portion, a vortex phenomenon in the cavity also occurs and a more excellent rectification effect can be obtained.

There is no clogging of debris, and even if debris is clogged, it becomes a snow-melting nozzle that can be easily removed immediately by raising and lowering the valve rod.

By combining the above-mentioned effects, it becomes a snow-melting nozzle that exhibits significantly higher practicality than conventional snow-melting nozzles, and this was proved in an actual comparative test test.

[Brief description of drawings]

The drawings show one embodiment of the present invention. Fig. 1 is a longitudinal sectional view, Fig. 2 is a perspective view of a valve rod, Fig. 3 is a perspective view of a main portion of the same example, and Fig. 4 is another example. FIG. 5 is a bottom view of the valve rod of FIG. 5, FIG. 5 is an explanatory view of another example of the annular water passage gap, and FIG. 6 is a perspective view of the valve rod used for the snow removal nozzle of FIG. 1 ... Water supply pipe connecting tube, 2 ... Cavity part, 3 ... Nozzle body, 4 ... Water spray hole, 5 ... Screw hole, 6 ... Valve rod, 7 ...
True circular hole, 7 '... Square edge, 8 ... Tapered peripheral surface, 9 ... True circular rod, 10 ... Water notch groove 10.

Front page continuation (72) Inventor Ryojiro Asano 2866 Tsukioka, Sanjo City, Niigata Pref., Asano Metal Industry Co., Ltd. (72) Inventor Kinju Asuka 2866 Tsukioka, Sanjo City, Niigata Pref. ) Inventor Kinji Asano Metal Industry Co., Ltd. 2866 Tsukioka, Sanjo City, Niigata Prefecture (72) Inventor Tsuyoshi Kuwahara 5295, No. 2 Gakumachidori, Niigata City, Niigata Prefecture Kowanai (56) References Actual Open 55-95858 (JP, U) Open 55-95860 (JP, U) Open 54-39715 (JP, U)

Claims (1)

[Claims] 1. A snow melting nozzle in which a nozzle body 3 having a cavity portion 2 is continuously provided on an upper portion of a water pipe connecting cylinder 1, and a water spray hole 4 is formed in an upper wall portion of the nozzle body 3, in which the nozzle body 3 is provided. A screw hole 5 is provided in the center of the upper wall portion, a valve rod 6 is screwed into the screw hole 5 so as to be able to move up and down, and a perfect circular hole 7 is formed in the upper portion of the water pipe connecting cylinder 1.
An opening is formed at the center of the valve rod 11, a tapered peripheral surface 8 having a smaller diameter is formed in the middle of the valve rod 6, and the true circular hole 7 is formed below the tapered peripheral surface 8 with a water passage gap 17 interposed therebetween. A perfect circular rod 9 that fits closely to the above is hung vertically, and water cutout grooves 10 are provided in the vertical direction at several locations on the outer circumferential surface of the perfect circular rod 9, and the square edge 7'of the perfect circular hole 7 is provided. A snow-melting nozzle characterized in that it is provided so as to stop the water sprinkling by abutting the tapered peripheral surface 8 on it and fitting the perfect circular rod 9 into the perfect circular hole 7.