JPH0422842Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention relates to a snow-melting water nozzle used to melt snow by sprinkling water on a road surface.

(Conventional technology) Road surface snow melting by water sprinkling has been widely practiced in the past, by burying water pipes under the road surface and protruding riser pipes at appropriate intervals, so that only the upper surface of the riser pipes is above ground level. It consists of connected water nozzles that are exposed to the water. There are various types of water spray nozzles, but basically, a water chamber is formed inside the nozzle body, a connecting hole connected to the riser pipe is connected to the lower part of the water chamber, and a water sprinkling port provided on the surface of the nozzle body is used for water supply. It is connected to the upper part of the chamber and is equipped with an appropriate water volume adjustment mechanism.

The water flow rate adjustment mechanism is generally controlled by the size of the connecting flow path between the connecting hole and the water chamber, and the entire valve mechanism is installed with the upper part of the nozzle body opened. One has a heavy cylinder body and adjusts the flow rate by rotating the internal cylinder body (Utility Model Publication No. 133352/1982), and one has a double structure and adjusts the flow rate by vertical movement of the internal spindle body (Japanese Patent Publication No. 12336/1989). No., Utsukai Showa 60-128749
(No. 161445), which does not have a double structure and directly opens and closes the connecting hole, and the opening/closing means directly opens and closes the mouth of the connecting hole (Utility Model Publication No. 161445/1983), and the opening/closing means seals the grooved valve stem to the connecting hole. There is a version with an insert (Jikko No. 59-9699).

(Problems to be solved by the invention) Each of the water volume adjustment mechanisms of the snow-melting water nozzle described above has advantages and disadvantages. That is, in the case of a double cylinder body in which the inner cylinder rotates, means for preventing the inner cylinder from coming off is required, resulting in a complicated structure. Further, the double structure spindle type has the disadvantage of requiring a large number of parts, similar to the above-mentioned double cylinder body. On the other hand, a device that directly opens and closes the connecting hole has a simple structure and requires fewer parts, but a device that opens and closes the mouth of the connecting hole has a narrow gap to reduce the flow rate. Air bubbles in the flowing water adhere to the gap and obstruct the flow of water, and if the mouth of the connecting hole is widened in an attempt to increase the flow rate, the flow rate increases rapidly, making fine adjustment difficult. In addition, the type that tightly inserts a grooved valve stem into the connecting hole has problems with its sealing performance, such as the main body (the surrounding wall of the connecting hole) being made of cast iron and the valve stem being made of brass. Water leaks more easily from the circumferential surface of the valve stem.

(Means for Solving the Problems) Therefore, the present invention aims to provide a water spray nozzle for snow melting that has a simpler structure and can appropriately adjust the flow rate. That is, the water nozzle of the present invention has a nozzle body in which the water sprinkling ports are arranged radially and obliquely on the upper surface of the water chamber, and the connecting hole is continuously provided on the lower surface of the water chamber, and the side wall of the connecting hole and the water chamber are communicated with each other. In addition to forming a flow path, a screw hole of an appropriate size is formed in the nozzle body above the connecting hole,
A threaded rod, which is tightly inserted into the connecting hole and has a valve rod of sufficient length to close the flow path opening, is screwed into the threaded hole.

Therefore, by moving the screw rod up and down, the flow path opening can be opened and closed and the degree of opening can be adjusted, thereby making it possible to adjust the flow rate of water sprinkled.

(Example) Next, an embodiment of the present invention will be described based on the drawings.

The water nozzle of the present invention consists of a nozzle body consisting of a main body A and a lid B, and a screw rod C. The main body A has a concave upper surface to form a water chamber 1, and is connected to a water pipe D downward from the center of a wide surface of the water chamber 1. A connecting hole 2 is drilled to connect with the protruding riser pipe E, and a flow path 3 is drilled to communicate between the side wall of the connecting hole 2 and a suitable location on the bottom surface of the water chamber 1. The lid B is a stainless steel disc body with a screw hole 4 of an appropriate size formed in the center, bolt holes 5 inserted at appropriate locations, and an appropriate number of water passage holes 6 drilled from the bottom surface. Water sprinkling ports 7 are provided obliquely in a radial manner from the water hole 6 toward the surface of the lid body. Also screw rod C
A screw part 8 is carved in the upper part to be screwed into the screw hole 4, and a valve rod 9 is connected to the lower part. The length is sufficient to close the area. The main body A, the lid B, and the threaded rod C are assembled to form a water spray nozzle, and the water nozzle is covered with the lid B so as to seal the water chamber 1 of the main body A, and is inserted into the bolt hole 5. The main body A and the lid B are integrated with a connecting bolt 10, and the screw rod C is inserted into the screw hole 4 so that the valve rod 9 is tightly inserted into the connecting hole 2. It is.

Therefore, the water in the water pipe D enters the connection hole 2 through the riser pipe E, and the amount of water is connected according to the area of the mouth of the flow path 3 determined by the position of the valve stem 9, that is, the vertical position of the screw rod C. Water enters the water chamber 1 from the hole 2 through the flow path 3, and from the water chamber 1 passes through the hole 6 and is sprayed onto the road surface from the water sprinkling port 7. In this way, the water volume is adjusted by moving the screw rod C up and down, and there is no need for a double structure like in the past, and the structure is made of very simple components. Since it depends on the area, it is not affected by air bubbles like the double structure, and since the valve stem is not grooved, it is possible to easily ensure airtightness with an appropriate O-ring 11.

The present invention is not limited to a nozzle body formed of a main body and a lid body as in the above-described embodiments, but is also applicable to a nozzle body formed of a single casting. Further, the shape of the flow path can also be made into any shape as shown in FIG.

(Effect of the invention) As described above, the present invention forms a flow path having an opening on the side wall of the connecting hole that connects the water chamber of the nozzle body and the riser pipe, and a threaded rod having a valve stem that is tightly inserted into the connecting hole. is screwed onto the nozzle body from above, and the opening/closing of the flow passage opening and opening adjustment are performed by vertical movement of the valve stem, and it has the same performance as a conventional double-structured valve mechanism. However, its structure is very simple.

[Brief explanation of the drawing]

The figures show an embodiment of the present invention. Figure 1 is a partially cutaway front view of the whole, Figure 2 is a plan view of the same, and Figure 3 is a partially cutaway front view of the whole.
4 and 4 are enlarged sectional views of the main parts, and FIG. 5 is an enlarged sectional view of the main parts of another embodiment. 1 is a water chamber, 2 is a connecting hole, 3 is a flow path, 4 is a screw hole,
5 is a bolt hole, 6 is a hole, 7 is a water spout, 8 is a screw, 9 is a valve stem, 10 is a connecting bolt, 11 is an O-ring, A is a main body, B is a lid, C is a threaded rod, D is a water pipe, and E is a riser pipe.

Claims (1)

[Scope of utility model registration request] In a nozzle body in which water sprinkling ports are provided diagonally in a radial manner on the upper surface of the water chamber and connecting holes are continuously provided on the lower surface of the water chamber, a flow path is formed that communicates the side wall of the connecting hole with the water chamber, and A screw hole of an appropriate size is formed in the nozzle body above the connecting hole, and a screw rod, which is tightly inserted into the connecting hole and has a valve rod of sufficient length to close the flow path opening, is screwed into the screw hole. Water nozzle for snow removal.