JPH0358780B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a water sprinkling amount adjusting device for a water sprinkling nozzle in a road snow removing device.

[Problems to be solved by conventional technology and invention]

The water nozzle is provided with a water amount adjusting device so that a substantially constant amount of water is sprayed at a substantially constant height both in areas away from the pump and in areas close to the pump.

Various structures have been adopted for this water flow regulating device, and the applicant has already filed applications for valves with various structures.

For example, instead of a two-part style consisting of a valve cylinder with a horizontal hole vertically installed, and a valve rod installed in the valve cylinder that can be moved up and down to open and close the side hole, as shown in Figure 4. We developed a one-piece style patent application No. 184609 (1983) in which only the valve rod was installed vertically.

This valve mechanism adopts a structure in which the amount of water to be sprayed is adjusted by moving the valve stem up and down to freely adjust the opposing gap between the opening corner edge A of the water passage hole and the valve stem surface B. When testing this valve, we found that if we reduced the amount of water sprayed to save water, or in other words, shortened the distance of water spraying, water would be sprayed at first, but after a while the watering would become poor or the reduced water volume could not be maintained. It's crowded,
It was confirmed that there are drawbacks such as stopping.

As a result of repeated tests and various considerations regarding the cause of this, we found that the phenomenon in which the slits shown in Figure 4, A and B, sometimes become about 0.5 mm wide is caused by narrowing the slits by 0.2 mm.
It has been found that this phenomenon occurs constantly when the water is about 1.5 mm in diameter, and the reason for this is that when the slit becomes extremely narrow in order to reduce the amount of water discharged, a water flow phenomenon occurs that resists the sudden attempt to force water from a wide area into a narrow area. It was concluded that this may be the reason why water is not introduced smoothly.

Of course, there are other fine particles such as iron in the water, and these fine particles can close the slits, and at the same time, dirt, gas, and grime can also promote this closure, causing water discharge failure to occur even more quickly. I deduced that it would be.

Then, I realized that if there are valve ports all around the circumference, it is necessary to narrow down the valve to an extreme degree.

Therefore, the applicant proposes that when regulating the amount of water by gradually narrowing the valve openings and consolidating the area of the valve openings in one place to ensure the minimum amount of water discharged, the area of the valve openings will increase accordingly, and the above-mentioned drawback can be solved. After conducting a test, it was confirmed that this idea was correct, and the present invention was completed by finding a shape for the valve opening that allows the appropriate amount of water to pass through even when the valve is constricted.

[Means to solve the problem]

The gist of the present invention will be explained with reference to the accompanying drawings.

A valve rod 2 is provided vertically in the center of the snow-blowing nozzle body 5 so as to be movable up and down, and the lower end of the valve rod 2 is inserted into the water passage hole 9 provided in the middle of the snow-blowing nozzle body 5. A valve hole 3 is bored in the peripheral wall of the vertical waterway 23 installed vertically at the bottom, and the opening shape of the valve port 1 of the valve hole 3 is changed to a triangular or circular main opening that widens toward the bottom. This invention relates to a water sprinkling amount adjustment device for a water sprinkling nozzle in a road snow removal device, characterized in that the opening shape is set in such a way that a small secondary opening 1b whose upper surface is formed into an arcuate surface 4 is connected to the top of the sprinkling nozzle 1a.

[Effect]

When the valve rod 2 whose lower end is fitted into the water passage hole 9 is gradually lowered to gradually narrow the valve port 1, the amount of water discharged from the valve port 1 is gradually reduced.

Since the shape of the valve port 1 that is constricted at this time is widened toward the bottom, the amount of water flowing through the valve changes greatly even if the degree of descent is small.

If the shape of the valve port 1 is made to have a downwardly expanding shape, the top shape becomes gradually narrower when viewed from the opposite side, which has the disadvantage of being extremely narrow as described in detail in the section of the conventional example.

In this respect, the present invention has an opening shape of the valve port 1 of the valve hole 3, as shown in FIGS. The opening of the valve port 1 is set to have a shape in which small secondary openings 1b formed in the arcuate surface 4 are arranged in series, so if you stop the narrowing down one step to an extreme and only the secondary openings 1b are opened, the opening of the valve port 1 will be Don't get too narrow. That is, the width does not become extremely narrow as shown in FIG. 4, which is 0.2 mm.

〔Example〕

In the one shown in FIG. 1, a rectifying chamber 6 is formed in the upper part of the snow removing nozzle body 5, a valve screw hole 19 is provided at the top of the snow removing nozzle body 5 communicating with the rectifying chamber 6, and a lower part of the snow removing nozzle body 5 is A water supply hole 8 is provided, a valve insertion hole 20 is provided to communicate the water supply hole 8 and the rectification chamber 6, and a male screw 13' is formed on the upper outer peripheral surface of the valve rod 2 to be screwed into the valve screw hole 19. A water chamber 21 is provided at the center of the valve rod 2, a water sprinkling hole 7 communicating with the water chamber 21 is bored at the top of the valve rod 2, and a rectification chamber 6 and the water chamber 21 are communicated at the center of the valve rod 2. A water hole 22 is drilled, a vertical water channel 23 in the shape of a vertical hole is bored in the center of the lower part of the valve rod 2, and a horizontal water channel 24 in the form of a horizontal hole is bored in the water hole 23 at different heights. The figure shows a case in which the valve ports 1 and 1' of each horizontal passage 24 are provided at different heights on the circumferential surface of the valve rod 2.

Water is supplied through water pipe 18, valve insertion hole 20, and vertical waterway 2.
3. Water passes through the horizontal waterway 24, the valve ports 1 and 1', the rectifying chamber 6, passes through the water hole 22, the water chamber 21, and is sprayed from the water sprinkling hole 7.

In the figure, reference numeral 25 is a rotation groove, 26 is a hole blocker, 1
7 is an O-ring.

The shape of the valve port 1 is such that the opening shape is a substantially triangular shape that widens toward the end, as shown in FIG. It may also be shaped like a potbell with an arcuate surface 4 on each side.

The internal structure of the snow removal nozzle body 5 can be modified in various ways.

〔Effect of the invention〕

Since the present invention is configured as described above, when the amount of water discharged is reduced in order to save water, the opening does not become extremely narrow and a constant amount of water is maintained, so that the water discharge is not interrupted like in the past. This is a water sprinkling amount adjustment device for a water sprinkling nozzle in a road snow removal device that never stops.

[Brief explanation of drawings]

FIG. 1 is a longitudinal cross-sectional view, FIGS. 2 and 3 are front views showing two examples of valve ports, and FIG. 4 is a cross-sectional view of the main parts of a conventional road snow-melting water nozzle. 1...Valve port, 1a...Main opening, 1b...Sub-opening, 2...Valve rod, 3...Valve hole, 4...Circular surface,
5...Snow removal nozzle body, 9...Water hole, 23...Vertical waterway.

Claims (1)

[Claims] 1. A valve rod 2 is provided vertically in the center of the snow-blowing nozzle body 5 so as to be able to rise and fall freely, and the lower end of this valve rod 2 is inserted into the water passage hole 9 provided in the middle of the snow-blowing nozzle body 5. A valve hole 3 is bored in the peripheral wall of a vertical waterway 23 installed vertically at the bottom of the valve hole 3, and the opening shape of the valve port 1 of the valve hole 3 is changed to a triangular or circular main opening that widens toward the bottom. A water sprinkling amount adjustment device for a water sprinkling nozzle in a road snow removal device, characterized in that a small secondary opening 1b whose upper surface is formed into an arcuate surface 4 is arranged in series at the top of a portion 1a.