JPS635146B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a spray nozzle suitable for use in applications such as chemical spraying, humidification, and burners.

Conventionally, various types of atomizing nozzles are commercially available, but there are variations in the particle size of atomization, and this phenomenon decreases as more high-pressure air is used and as the amount of liquid injected decreases, but the ability decreases. At the same time, wear of the orifice increases, causing problems in durability.

The present invention does not cause variation in particle diameter even when relatively low-pressure air is used, makes it possible to adjust atomization highly efficiently over a wide range, and is extremely durable. It is something that

An example of implementing the present invention will be described below based on the drawings. Figure 1 is a parts diagram, in which A is a partially cutaway perspective view of the nozzle body, B is a partially cutaway perspective view of the core, C is a partially cutaway perspective view of the spacer, and D is a partially cutaway perspective view of the spacer.
2 is a perspective view of the cap, and FIG. 2 is a vertical sectional view of the assembled state.

The nozzle body 1 has a cylindrical or prismatic outer shape with a main hole passage 2 bored in the center, a small diameter tube protruding from the rear end, and a spiral groove engraved on the outer periphery. It is adapted to be connected to an air pipe (not shown).
Here, the diameter of the main passage 2 is expanded in steps toward the front within the main body 1 as a primary passage a, a secondary passage b, and a tertiary passage c. In the first step, a shoulder T ₁ with a slightly expanded diameter is formed, and in the next step, a shoulder T ₂ is formed with a greatly expanded diameter. A spiral groove is carved on the inner peripheral surface.

On the other hand, reference numeral 3 denotes a sub-hole passage which branches from the middle of the main passage 2 and is bored inside the nozzle body, and forms a secondary flow of air. Reference numeral 4 denotes a liquid injection hole formed in the side wall of the nozzle body, which has a spiral groove engraved on its inner circumferential surface and communicates with the secondary hole b of the main hole passage inside. On the other hand, numerals 5 and 6 are adjustment screws, and the tips of each screw are placed in the middle of the sub-hole passage 3 for the former, and in the middle of the main passage 2 for the latter, so that the amount of air passing therethrough can be adjusted from the outside. It's becoming like that.

Numeral 7 is a core body inserted into the secondary hole path b of the main hole path 2, and a packing 8 is provided at the rear part of the core body so as to be tightly fitted. The core body has a through hole 9 for air passage in the center thereof in the length direction, and the hole diameter is reduced at the tip to form an orifice 10, which is directed outward. The ends are made to expand into a trumpet shape. Further, slightly forward of the middle of the core body, a spiral groove 2 is provided in a certain range of the circumferential portion in a state that slightly protrudes, and a plurality of locations of the spiral groove 2 are cut out to form slits 11. It will be done so that This acts as a passage for the injection liquid, which will be described later.
Further, toward the internal orifice 10, a plurality of through holes 12a, 12b, 12c... are bored from the outer periphery, and from the slightly forward position where the through holes are drilled toward the tip, the outer diameter is reduced to form an L-shaped step K.
is formed.

Reference numeral 15 denotes a spacer, which is formed between the front cylinder body 17a and the rear cylinder body 17b, sandwiching the flange 16, and has screw grooves E and F carved on the outer periphery of each spacer.
7b is screwed into the tertiary hole path c of the nozzle body 1. Here, the spacer 15 has an inner hole 18 bored therein into which the front part of the core core 7 can be inserted, and a screw groove is carved in the rear inner circumferential surface so that the core core 7 can be inserted into the spacer 15. The inner circumferential surface of the front part is formed into a key step M to engage and secure the L-shaped step K of the core body 7. It's summery. In addition, 19 is the rear cylinder part 17a
A plurality of through holes are formed around the inner hole 18 so that air from the sub-hole passage 3 of the nozzle main body 1 can flow through the holes. It's starting to pass.

Reference numeral 20 denotes a cap, which has a threaded groove on its rear inner circumferential surface to connect the front cylindrical portion 17a of the spacer 15.
A through hole 21 is formed in the front face of the cap to form a nozzle opening, and the inner peripheral surface of the cap and the front wall of the spacer are connected to each other. An air outflow gap 22 having a constant inclination angle and descending is formed between them.

When assembling each part, use spacer 1 in advance.
5 and the screw groove 2 of the core core body 7 to integrate them, and then the nozzle body 1 is assembled.
Push the core core body 7 toward the secondary hole path b of the spacer 15, and finally fix it by screwing the screw grooves R and H of the rear cylinder body 17b of the spacer 15 and the tertiary hole path c of the nozzle body. Let it happen. This time 23 and 24
is a seal for sealing. Next, spacer 1
A cap 20 is attached to the front cylinder 17a of the
They are screwed together and fastened through the screws 5.

This assembled condition is as shown in Fig. 2. In use, an air pipe (not shown) is connected to the screw groove A at the rear end of the nozzle body, and a spray pipe is connected to the liquid injection hole 4. The liquid pipe is connected. As a result, the tips (not shown) of each tube are opened, and at that time, the liquid to be sprayed from the liquid tube passes through the outer periphery of the core body 7 and passes through the through holes 12a, 12b, 1 from the tip.
2c... and flows toward the orifice 10 inside the core body.

On the other hand, pressurized air from the air pipe enters the through hole 9 of the core body 7 through the main hole passage 2, and enters the orifice 10.
The injection liquid is atomized at this point. Incidentally, at this time, the air that is branched from the main hole passage 2 and flows into the sub-hole passage 3 passes through the through hole 19 of the spacer 15, and then descends through the passage 22 between it and the inner peripheral surface of the cap, and is mixed with the spray liquid. By injecting in an intersecting manner, the atomized liquid from the orifice is further atomized by shearing action even at a relatively low pressure.

That is, according to the nozzle of the present invention, it is possible to atomize over a wide range of 1 to 200 microns and spray to a desired distance, and this can be done easily by adjusting the adjusting screws 5 and 6. It can be done. The product of the present invention is easy to assemble and disassemble, and can be atomized at relatively low pressure, so it has excellent wear resistance and durability.

[Brief explanation of the drawing]

Figure 1 is a parts diagram, in which A is a partially cutaway perspective view of the nozzle body, B is a partially cutaway perspective view of the core, C is a partially cutaway perspective view of the spacer, and D is the cap. FIG. 2 is a vertical sectional view of the assembled state. DESCRIPTION OF SYMBOLS 1...Nozzle body, 2...Main hole passage, 3...Sub-hole passage, 4...Liquid injection hole, 5, 6...Adjustment screw, 7...
...core core body, 12a, 12b, 12c...through hole,
15...Spacer, 20...Cap.

Claims (1)

[Claims] 1. A nozzle body, which has a main hole for air inflow in the center, a sub-hole that branches off from the entrance of the main hole, and a liquid injection hole in the middle; The main channel has a through hole in the center for air passage, an orifice is formed at the tip of the through hole, and a plurality of liquid inlet holes are bored at the orifice positions on the outer periphery. In addition to inserting the rear half of the core core, the front half of the core core is inserted and locked into the center hole of a spacer fixed to the front surface of the nozzle body, and at that time, the core core is inserted. A certain gap is formed between the outer periphery of the body and the main hole passage of the nozzle body and the center hole of the spacer, so that a liquid passage is formed. A plurality of through holes are drilled to guide air from the cap to the front edge, and a cap with a through hole drilled in the center is attached to the front surface, and a downward air flow is formed between the cap and the inner circumferential surface of the cap. A spray nozzle characterized in that an air outflow gap with a constant inclination angle is formed, and an adjustment screw for adjusting the amount of air passing is provided in the middle of a main hole path and a sub hole path for air inflow of the nozzle body.