JPH06171475A - Injection nozzle - Google Patents

Abstract

PURPOSE:To secure a specified injection quantity, capable of altering a nozzle caliber and a spraying area automatically according to an inlet fluid. CONSTITUTION:This nozzle is provided with a single inlet port 16 introducing both high-and low-pressure fluids selectively, and a single passage port 15 being interconnected to this inlet port, and opened to the outside. A small diametral nozzle shaft 19 is installed in this passage port shiftably in the axial direction, and a pressure receiving member 21 is clamped to one end of the shaft. This pressure receiving member is shiftably installed by a pressure action of the inlet fluid, and usually this pressure receiving member is energized in an outer opening direction of the passage port. In addition, a larger diametral valve seat 27 than the shaft is installed in the other end of the nozzle shaft, forming a seat surface 28 on the surface, and an injection port 29 to be interconnected to the passage port is opened to an outer end face of the seat. In succession, a large diametral diffusion passage 30 is installed in an inner surface of the passage port, thereby forming a seat surface 31 in a passage.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an injection nozzle suitable for, for example, a car wash nozzle, and capable of automatically changing the ejection outlet diameter and ejection area according to the introduced fluid to obtain a predetermined injection amount.

[0002]

2. Description of the Related Art For example, a large-sized car washing machine is equipped with water and air injection nozzles, respectively, and after car washing with water or warm water, air is blown to remove water adhering to the vehicle body, and even drying is possible. There is.

However, in a small car washing machine having only one injection nozzle, water or hot water is mainly injected, and air is not blown. In this case, even if air is supplied to the nozzle, an injection port that injects water having a pressure higher than the air pressure has a small diameter and a small amount of air injection, and has a poor draining effect, which is not practical.

In order to solve such a problem, for example, in Japanese Utility Model Laid-Open No. 63-89379, a single nozzle is provided at the tip of a nozzle communicating with a water supply source and an air pressure source, and its base end is provided. A changeover switch is provided so that water or air can be selectively ejected from the ejection port through the switching operation of the switch.

[0005]

However, since this conventional device shares the water and air nozzles, as described above, the amount of air injected from the nozzles is too small to be used practically. , There was a problem.

The present invention solves such a problem, and can obtain two jetting modes in which a single nozzle has different diameters and areas of the jet ports, and these jetting modes are automatically switched according to the introduced fluid, and a predetermined jetting mode is provided. An object of the present invention is to provide an injection nozzle capable of obtaining the ejection amount.

[0007]

Therefore, the injection nozzle of the present invention is provided with a single inlet hole for selectively introducing a high pressure fluid and a low pressure fluid, and a single inlet hole communicating with the inlet hole and opening to the outside. A nozzle hole having a diameter smaller than the hole is provided in the passage hole so as to be movable in the axial direction, a pressure receiving member is fixed to one end of the shaft, and the member is used as an introduction fluid. Is provided movably by the pressure action of, and the pressure receiving member is normally urged toward the outer opening direction of the passage hole, and a valve seat having a diameter larger than that of the nozzle shaft is provided at the other end of the nozzle shaft. A sheet surface is formed, and an injection hole communicating with the passage hole is opened on the outer end surface of the sheet, and a diffusion passage having a diameter larger than that of the passage hole is provided on the inner surface of the passage hole. The seat surface that can be engaged is formed and The surface is made to be engageable at the time of introducing the high pressure fluid so that the diameter and area of the ejection port can be automatically changed according to the fluid having different pressures and a predetermined ejection amount can be obtained. I am trying.

[0008]

[Operation] The jet area and jet diameter are automatically set according to the pressure of the introduced fluid. That is, in the case of a low pressure fluid such as air, the ejection port diameter and ejection area are set large, and in the case of a high pressure fluid such as water, the ejection port diameter and ejection area are set small. Therefore, with a single nozzle, it is possible to obtain two types of injection modes in which the ejection port diameter and the ejection area are different, and it is possible to obtain a predetermined injection amount.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An illustrated embodiment in which the present invention is applied to a car wash nozzle will be described below. In FIGS. 1 to 3, reference numeral 1 is a box-shaped car wash main body, which communicates with an air supply source such as an air compressor. An air supply pipe 2 and a water supply pipe 3 communicating with a water supply source such as a water supply are connected.

A switching valve 4 such as a solenoid valve which interlocks with a later-described changeover switch is connected to the air supply pipe 2, and a heating device 5 such as an electric heater or a boiler which interlocks with the later-described changeover switch is connected to the water supply pipe 3. The pressurizing pump 6 and the switching valve 7 such as a solenoid valve are connected, and the air supply pipe 2 is connected to the downstream side of the switching valve 7.

Both ends of a bypass pipe 8 are connected to the front and rear of the heating device 5, and a switching valve 9 such as a solenoid valve which is linked to a switching switch described later is connected to the pipe 8.

On the outside of the car wash main body 1, for example, one flexible conduit 10 communicating with the downstream side of the water supply pipe 3 is piped, and a nozzle handle 11 made of a metal pipe is connected to the tip of the pipe 10. ing.

The above-mentioned changeover switch 12 is provided at the base end portion of the nozzle handle 11, that is, at the hand side, and the switch 12 has a plurality of operation buttons (not shown) for selecting a jet fluid such as water, hot water, or air. , One of the buttons is turned on to activate the corresponding solenoid valves 4, 7, 9 and the devices 5, 6.

An injection nozzle 13 is connected to the tip of the nozzle handle 11, and the nozzle 13 is formed in a slender cylindrical body, and a concave hole 14 having different diameters, which communicates with each other, is formed therein.
A passage hole 15 having a slightly larger diameter on the discharge side is formed, and an inlet hole 16 communicating with the nozzle handle 11 is opened in the inner portion of the passage hole 15.

At the end of the injection nozzle 13, the air escape hole 1
The cap 18 on which the 7 is formed is screwed into the recess 1
4 is closed, and a nozzle shaft 19 is housed inside the passage hole 15 so as to be movable in the axial direction.
A piston 21, which is a pressure receiving member, is attached to one end of the shaft 19 via a shim 20, and is fixed by a nut 22.

The piston 21 is slidably accommodated in the peripheral surface of the concave hole 14, and a spring 23 is interposed between the piston 21 and the cap 18, and the piston 21 and the nozzle shaft 19 integral with the piston 21 are provided. , The ejection fluid is urged in the ejection direction.

In the figure, 24 is an O-ring mounted on the peripheral surface of the piston 21, and 25 is a threaded portion formed at the tip of the nozzle shaft 19.

A lateral hole-like through hole 26 is opened in the peripheral surface of the other end of the nozzle shaft 19, and a valve seat 27 having a diameter larger than that of the nozzle shaft 19 is provided slightly on the axial end side of the hole 26.
Is provided.

A taper seat surface 28 is formed at the base end portion of the valve seat 27, and the tip end portion thereof is formed in a tapered truncated cone shape. The end surface of the valve seat 27 communicates with the through hole 26. The hole 29 is open.

A diffusion passage 30 having a diameter larger than that of the hole 15 is provided on the peripheral surface of the passage hole 15 corresponding to the valve seat 27, and the seat surface 28 can be engaged with the inner portion of the hole 30. A tapered seat surface 31 is formed.

In addition, reference numeral 32 in the figure denotes a wheel provided on the car wash main body 1 so that it can run on the floor surface 33.

FIG. 4 shows another embodiment of the present invention, in which the same reference numerals are used for the portions corresponding to the above-mentioned configuration. In this embodiment, the liquid supply pipe 34 is arranged in the car wash main body 1,
A tank (not shown) in which one end of the pipe 34 is connected to the downstream side of the water supply pipe 3 and the other end contains a detergent liquid or liquid wax
And the like, and a pressurizing pump 35 and a solenoid valve 36 similar to the one described above are connected to the pipe 34 to enhance the cleaning effect or to apply wax.

In this case, if a low-pressure pump is used as the pump 35, it is possible to prevent the scattering of the detergent and wax, and in that case, the jet port is set to have a large diameter as in the case of jetting air as described later. Therefore, it can be sprinkled with detergent etc., and the above-mentioned scattering prevention is enhanced.

The injection nozzle thus constructed is connected to the tip of the nozzle handle 11, the other end of the handle 11 is connected to a single conduit 10, and the pipe 10 is supplied with water or hot water, air, as shown in FIG. In this case, detergent liquid or liquid wax can be supplied in addition to the above.

Therefore, the weight applied to the nozzle handle 11 is reduced and the burden required for the operation of the handle 11 is reduced as compared with the case where the conduit is drawn out from each of these jetted fluids and the other end thereof is connected to the nozzle handle 11. Then, this can be performed easily and lightly, and the required cost of the conduit 10 can be significantly reduced.

Further, in the injection nozzle of the present invention, since the single nozzle 13 can obtain two different injection port diameters and injection port areas as described later, it is possible to obtain an injection mode according to the ejected fluid and to obtain the conventional injection nozzle. Compared to the one nozzle and one nozzle
The number of nozzle parts can be reduced by half.

In the injection nozzle attached to the nozzle handle 11 in this way, the piston 21 is normally pushed by the spring 23 and pressed against the bottom of the recessed hole 14 as shown in FIG. 2, and the nozzle shaft 19 to which the piston 21 is fixed is fixed. In the lowest position shown, the seat surface 28 of the valve seat 27 is separated from the seat surface 31 of the diffusion passage 30.

When actually washing the vehicle under such a condition, the changeover switch 12 mounted on the near side of the nozzle handle 11 is operated and the operation button for water or hot water is turned on.

In this way, for example, the warm water button O
By the N operation, the signal is changed to the heating device 5 and the pressurizing pump 6.
To a solenoid valve 7, which are operated to heat the car wash water to a predetermined temperature by the heating device 5, and the pressurizing pump 6 pressurizes it to a predetermined pressure, which is about 80 kg / cm 2 in the embodiment, After opening the valve, the solenoid valve 7 sends it to the conduit 10.

The hot water is guided to the conduit 10 and moves to the nozzle handle 11, and flows from the tip of the handle 11 into the inlet hole 16 of the injection nozzle 13. After that, the hot water moves from the inlet hole 16 to the passage hole 15, and the pressure thereof is changed to the piston 21.
Acting on the lower surface of the spring to push up the piston 21 against the elasticity of the spring 23.

Along with the upward movement of the piston 21, the nozzle shaft 19 which is integral with the piston 21 moves together, and the seat surface 28 of the valve seat 19 provided at the tip of the piston shaft 19 engages with the seat surface 31 of the diffusion passage 30. By the way, stop. This situation is shown in Figure 3.
Thus, the conduction between the passage hole 15 and the diffusion passage 30 is cut off.

Therefore, hot water is passed from the passage hole 15 to the through hole 2.
It is guided by 6 to move through the injection hole 29, is ejected to the outside from the opening, and is blown to the vehicle body.

In this case, since the diameter of the injection hole 29 is much smaller than that of the air ejection port, hot water is ejected intensively and vigorously. Therefore, even if the nozzle 13 of the present invention is slightly heavier than the conventional car wash nozzle, the reaction force at the time of the fountain reduces the load at the time of operating the nozzle handle 11.

After washing the car, to remove the water adhering to the vehicle body, operate the selector switch 12 and turn off the hot water button.
Then, turn on the air button instead.

As described above, in the present invention, the above-mentioned equipment is turned on.
Since it can be turned off with the selector switch 12 at hand,
During the above operation, there is no need to go to the equipment position and interrupt the work.

By the above operation, the heating device 5 and the pressurizing pump 6 stop driving, the electromagnetic valve 7 closes,
The supply of hot water to the injection nozzle 13 is stopped.

Therefore, the water pressure acting on the piston 21 disappears, the piston 21 is pushed by the elasticity of the spring 23, and is pushed against the bottom portion of the concave hole 14 to recover the situation of FIG.

On the other hand, the air compressor is driven by the above operation, and the solenoid valve 4 is opened, so that compressed air of a predetermined pressure, in the embodiment, about 8 kg / cm 2 of air is sent out from the solenoid valve 4 to the conduit 10. .

The above-mentioned air is guided to the conduit 10, moves to the nozzle handle 11, flows from the tip of the handle 11 into the inlet hole 16 of the injection nozzle 13, moves to the passage hole 15, and its pressure is increased. It acts on the lower surface of the piston 21.

In this case, since the pushing force by the pressure is smaller than the elasticity of the spring 23, the piston 21 maintains the state of FIG.

Therefore, the compressed air moves through the passage hole 15, slides between the diffusion passage 30 and the valve seat 27, and is ejected to the outside. A part of the compressed air is guided to the through hole 26 and the injection hole 29. , And squirt from the opening to the outside,
It is sprayed on the car body.

In this case, the air injection amount is approximately the diffusion passage 30.
Is proportional to the amount of air passing through the
It is determined by the size of the gap of 8, 31 and this gap adjustment is performed by setting the plate thickness of the shim 20.

As described above, according to the present invention, the jet fluid is automatically switched to the optimum jet port. As described above, in the case of air having a lower pressure than the wash water, the jet port diameter is large and the jet port area is extremely small. Because it is very large, a large amount of air can be blown onto the vehicle body to drain water efficiently.

Moreover, at this time, a part of the air is guided to the through hole 26 and the injection hole 29, so that the residual liquid in that portion can be removed. In particular, this effect can prevent the situation in which after the detergent liquid or the wax is sprayed as shown in FIG. 4, they remain in the through holes 26 and the injection holes 29 and solidify to cause clogging.

[0045]

As described above, in the injection nozzle of the present invention, a nozzle shaft having a diameter smaller than the hole is provided in the passage hole so as to be movable in the axial direction, and a pressure receiving member is fixed to one end of the shaft and the member is fixed. It is movably provided by the pressure action of the introduced fluid, normally urges the pressure receiving member toward the outer opening direction of the passage hole, and at the other end of the nozzle shaft, a valve seat having a diameter larger than that of the shaft is provided. Form a sheet surface on the surface,
Further, an injection hole communicating with the passage hole is opened on the outer end surface of the sheet, and a diffusion passage having a diameter larger than that of the hole is provided on the inner surface of the passage hole, and the passage surface is engageable with the seat surface. Since these seat surfaces are engaged with each other when the high-pressure fluid is introduced, it is possible to obtain two types of injection modes with different nozzle opening diameters and nozzle areas with a single nozzle, and the optimum injection according to the introduced fluid. As well as obtaining the amount, these injection modes can be automatically set by the pressure of the introduced fluid.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing an example in which the present invention is applied to a car wash nozzle.

FIG. 2 is a cross-sectional view showing an embodiment of the present invention, showing a situation at the time of injecting air which is a low pressure fluid.

FIG. 3 is a cross-sectional view showing an embodiment of the present invention, showing a situation at the time of water injection which is a high pressure fluid.

FIG. 4 is an explanatory diagram showing a main part of another embodiment of the present invention.

[Explanation of symbols]

 13 nozzle 15 passage hole 16 inlet hole 19 nozzle shaft 21 pressure receiving member 27 valve seat 28, 31 seat surface 30 diffusion passage

Claims (1)

[Claims] 1. An injection nozzle comprising a single inlet hole for selectively introducing a high-pressure fluid and a low-pressure fluid, and a single passage hole communicating with the inlet hole and opening to the outside, wherein the passage hole is provided. A nozzle shaft having a diameter smaller than that of the hole is provided so as to be movable in the axial direction, a pressure receiving member is fixed to one end of the shaft, and the member is provided so as to be movable by the pressure action of the introduced fluid. Of the nozzle shaft, a valve seat having a diameter larger than the shaft is provided at the other end of the nozzle shaft, a seat surface is formed on the surface of the seat, and a passage hole is formed in the outer end surface of the seat. While opening the communicating injection holes, a diffusion passage having a diameter larger than that of the passage is provided on the inner surface of the passage hole, and a seat surface engageable with the seat surface is formed in the passage. It is characterized in that it can be engaged at the time of introduction Injection nozzle.