JPH0422848Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a snow removal nozzle mainly used for removing snow from roads.

[Conventional technology]

Snow melting nozzles are not practical unless they have a water flow control valve that can adjust the amount of water sprayed.

Therefore, various water flow control valves were developed.

Some examples are as follows.

a. A type that has a valve seat on the top of the water hole that is larger in diameter than the water hole and completely blocks the water hole so that it can be raised and lowered.

b. A type that has a lifting rod that moves up and down inside the valve cylinder, has a horizontal hole in the middle of the valve cylinder, and opens and closes this horizontal hole at the lower end of the lifting rod by raising and lowering the lifting rod.

c A type in which the inner valve body is slid against the outer valve body so that it can rotate, and the rotation of one side opens and closes the side valve holes of both.

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

and so on.

[Problem that the invention attempts to solve]

In the above-mentioned type A, the valve seat is in a cantilevered state when opened, so the threaded portion tends to become loose, so it cannot be used for a long time, and the rectifying effect within the cavity is not good.

The b type requires two parts, a valve cylinder and a lifting rod, which is difficult to manufacture and expensive, and its rectifying effect is poor, requiring a special rectifying device.

In addition, since the screw structure is double-layered, it is more easily damaged and cannot be used for a long time.

The c type also consists of two parts, an outer valve body and an inner valve pair, which is difficult to manufacture and expensive, and also difficult to fit together, making it impossible to expect a rectifying effect.

The d type is easily clogged with dust and has a poor rectification function, requiring a special rectification device.

The applicant began research on a water flow control valve that would solve these shortcomings, prototyped various products, tested them, and completed Japanese Patent Application No. 184609/1984 (see Japanese Unexamined Patent Publication No. 27657/1983). . Although this invention has achieved excellent results in comparison with conventional products, there was a drawback that the valve stem could not be screwed in smoothly, so the present invention further improves on this point.

[Means for solving problems]

The configuration will be detailed as follows with reference to the accompanying drawings.

In a snow removal nozzle in which a nozzle body 3 having a cavity 2 is connected to the upper part of a water pipe connection tube 1 and a water fountain 4 is bored in the upper wall of the nozzle body 3, the center of the upper wall of the nozzle body 3 is A screw hole 5 is provided in the screw hole 5.
A valve rod 6 is screwed onto the valve rod 6 so that it can be raised and lowered, a perfect circular hole 7 is formed in the upper part of the water pipe connection tube 1, and a tapered peripheral surface 8 whose diameter is smaller at the bottom is formed in the middle of the plate rod 6. The lower part of the tapered circumferential surface 8 is formed into a round rod 9 that tightly fits into the round hole 7, and the lower end of this round rod 9 is formed with a tapered insertion part 9'. It is characterized by providing water passage notches 10 that form grooves in the vertical direction at several locations on the circumferential outer surface.

Further, it is preferable to form an annular water passage hole 11 between the tapered peripheral surface 8 and the circular rod.

Further, it is preferable to form the water passage groove 12 in the circular rod 9 by reversing the relationship between the water passage notch 10 and the circular rod 9.

[Effect]

When the valve stem 6 is screwed in, the tapered circumferential surface 8 is pressed against the corner edge 7' of the circular hole 7, and water flow is completely blocked.

When the valve stem 6 is rotated in the opposite direction and raised, a space is created between the tapered circumferential surface 8 and the corner edge 7' of the circular hole 7, allowing water to pass through, and the amount of water flowing is determined by the size of this space. will be adjusted.

At this time, the water (often groundwater) rises through the water passage notch 10 provided in the circular rod 9 of the valve stem 6, passes through the annular water passage 11, and flows along the tapered peripheral surface 8 to the nozzle body 3. Water is sent to the cavity 2 and sprayed from the water fountain 4, but since the water overflows into the cavity 2 along the tapered circumferential surface 8, a rectification phenomenon occurs within the cavity 2, especially when the water is completely circular. Along the tapered insertion part 9' at the lower end of the rod,
Then, the water is inserted along the water passage notch 10 or the water passage groove 12, and then introduced into the cavity 2 along the tapered circumferential surface 8, so that the flowing water has a uniform water pressure over the entire area of the cavity 2. Water is uniformly sprayed from the water fountain holes 4, resulting in an extremely good rectifying effect.

〔Example〕

In the figure, reference numeral 13 is a threaded part, 14 is a retaining ring, and 15
16 is a packing, 16 is a fountain inlet, 17 is a small diameter portion, 18 is a water pipe, and 19 is an O-ring.

[Effect of idea]

Since the present invention is constructed as described above, it becomes a simple and inexpensive snow removal nozzle that exhibits the following superior features over conventional water flow control valves.

Since it is a one-piece style water flow control valve consisting of one valve stem, it is easy to manufacture and inexpensive, resulting in a snow removal nozzle that is correspondingly inexpensive.

This is a water flow control valve that opens and closes the water flow hole when the tapered circumferential surface fits into the corner edge of the water flow hole (perfect circular hole), making it a water flow control valve that can finely adjust the water flow or completely shut off, making it highly practical. It becomes a snow removal nozzle.

Since the round rod is tightly fitted into the round hole, the threaded portion of the valve stem will not loosen, resulting in a water flow control valve that can be used for a long time.

The water flow collides with the entire circumference of the tapered circumferential surface and flows into the cavity (cavity part), so the water pressure becomes uniform throughout the cavity, resulting in an extremely rectifying effect where water is sprayed uniformly from all the water fountains. Makes an excellent snow removal nozzle.

In particular, by designing the shape of the tapered insertion part at the bottom of the round rod, the water passage notch, and the side surface of the water passage groove, a vortex phenomenon occurs inside the cavity, and an even better rectification effect can be obtained.

To provide a snow removal nozzle that does not get clogged with dirt and even if it becomes clogged, it can be easily removed by raising and lowering the valve stem.

When attempting to screw the valve stem into the screw hole, the circular rod must first be fitted into the circular hole. At this time, since the plate rod is inserted into the screw hole, it is troublesome to push the round rod into the round hole, but in this invention, the insertion part is formed in a tapered state at the bottom of the round rod. First, since the tapered insertion part is easily inserted into a circular hole, there is no need to select a hole and the insertion can be screwed in immediately, which is extremely convenient.

Moreover, the presence of this tapered insertion portion also results in good water flow.

The above effects are combined to create a snow removal nozzle that exhibits far superior practicality compared to conventional snow removal nozzles, and this has been proven in actual comparison tests.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention; FIG. 1 is a longitudinal cross-sectional view, FIG. 2 is a perspective view of a valve stem, FIG. 3 is a perspective view of a main part of the same embodiment, and FIG. 4 is a different embodiment. Figure 5 is an explanatory diagram of another example of the annular water passage, Figure 6 is a bottom view of the valve stem.
This figure is a perspective view of a valve stem used in the snow removal nozzle of FIG. 5. DESCRIPTION OF SYMBOLS 1... Water pipe connection tube, 2... Cavity part, 3... Nozzle body, 4... Water fountain hole, 5... Screw hole, 6...
Valve stem, 7...Perfect circular hole, 8...Tapered circumferential surface, 9...
...Perfect round rod, 9'...Tapered insertion part, 10...Water passage notch, 11...Annular water pipe, 12...Water groove.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. In a snow-blowing nozzle in which a nozzle body having a cavity is connected to the upper part of a water pipe connection tube and a water fountain is bored in the upper wall of the nozzle body, A screw hole is provided in the center of the wall, a valve stem is screwed into this screw hole so that it can be raised and lowered, a perfect circular hole is formed in the upper part of the water pipe connection tube, and a taper is formed in the middle of the valve stem so that the diameter becomes smaller at the bottom. A round rod is formed at the lower part of the tapered peripheral surface to tightly fit into the round hole, and a tapered insertion part is formed at the lower end of the round rod. A snow removal nozzle characterized by having water passage notches that form grooves in the vertical direction at several locations on the circumferential outer surface. 2. Annular water passage between the taper circumferential surface and the circular rod.
A snow removal nozzle according to claim 1 of the utility model claim. 3 Utility model claim 1 in which a water passage groove is formed in a circular rod by reversing the relationship between the water passage notch and the circular rod.
Snow removal nozzle as described in section.