JPH0344267Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a fine mist spray nozzle with a two-stage strainer.

(Prior art) Traditionally, various chemicals, water,
Various types of fine spray nozzles are widely used for dispersing chemical solutions.

This type of fine mist spray nozzle is generally equipped with a swirling inflow groove, a swirling chamber, and a spout in its nozzle tip, and is configured to spray a fine mist by swirling the liquid and ejecting it from the spout. A chamber pressure valve is built into the spray nozzle to prevent droplets from falling when the liquid pressure drops, such as at the start or end.

This type of fine mist spray nozzle is equipped with a strainer to prevent clogging because the swirling inflow groove and nozzle are formed into microchannels of about 200 to 500 microns, but this strainer is generally Only one stage is provided upstream of the chamber pressure valve (see Utility Model Publication No. 1989-895).

(Problem that the invention aims to solve) In the case of conventional fine mist spray nozzles, only one stage of strainer was installed at the inlet on the most upstream side of the nozzle, which caused problems such as algae, limescale, and rust that occurred in the piping. There is a problem in that elongated foreign objects pass through the strainer and clog the swirling inflow groove or spout of the nozzle tip, requiring frequent disassembly and cleaning of the spray nozzle.

In particular, algae and limescale are also generated in the flow path downstream of the strainer in the nozzle, but since these algae are not filtered by the strainer, they often cause clogging.

(Means for Solving the Problems) The fine mist spray nozzle with a two-stage strainer according to the present invention has a nozzle chip having a swirling inflow groove, a swirling chamber, and a spout at the downstream end in the nozzle body cylinder, and an upstream side of the nozzle chip. A closer that contacts from the side and covers the swirl inflow groove is attached, and the valve body is brought into contact from the downstream side with the valve seat of the annuloplasty cylinder, which is screwed into the upstream end of the nozzle body cylinder, and the valvuloplasty is performed. A strainer holder is provided which contacts the downstream end face of the cylinder, a first compression spring is interposed between the strainer holder and the valve body, a second compression spring is interposed between the strainer holder and the closer, and the upstream end of the annuloplasty cylinder A first strainer is provided at the inlet and a second strainer is provided at the strainer holder.

(Function) In the fine mist spray nozzle with a two-stage strainer according to the present invention, the valve body is elastically biased against the valve seat portion by the first compression spring, and the closer is elastically biased against the nozzle tip by the second compression spring. . The liquid flowing from the inlet at the upstream end of the valvuloplasty cylinder is filtered by the first strainer, flows through the valvuloplasty cylinder and reaches the second strainer, and after being filtered by the second strainer, the liquid flows into the swirling inflow groove of the nozzle tip. It becomes a swirling flow with the swirling chamber,
A fine mist is sprayed from the nozzle.

(Effect of the invention) According to the fine mist spray nozzle with a two-stage strainer according to the invention, in addition to the first strainer provided at the inlet at the upstream end of the annuloplasty cylinder as described above, Since the second strainer is installed in the strainer holder at the position of , foreign matter that has passed through the first strainer and algae that has grown inside the valve formation cylinder are captured by the second strainer, so keep an eye on the rotating inlet groove and spout of the nozzle tip. Significantly reduces the frequency of clogging,
The number of disassembly and cleaning can be reduced.

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

The fine mist spray nozzle with a two-stage strainer according to this embodiment is used for various chemicals,
It is used to spray water, chemical solutions, etc. into a fine mist.

As shown in FIG. 1, this fine mist spray nozzle N with a two-stage strainer consists of a nozzle body cylinder 1, a annuloplasty cylinder 2 screwed into the upstream end of the nozzle body cylinder 1, and an O-ring inside the annulus cylinder 2. a valve seat 3 made of steel, a valve body 4 made of a steel ball that abuts the valve seat 3 from the downstream side, a first compression spring 5 that elastically biases the valve body 4 against the valve seat 3;
A strainer holder 6 attached to the downstream end of the annuloplasty tube 2, a nozzle tip 7 installed in the downstream end of the nozzle body tube 1, and a closer 8 that comes into contact with the upstream end surface of the nozzle tip 7; a second compression spring 11 that applies pressure, and a first strainer 9 that is externally mounted on about 1/2 of the upstream side of the annuloplasty cylinder 2.
A second strainer 10 interposed in the flow path opening 6a of the strainer holder 6 is provided.

The upstream end surface of the ceramic nozzle tip 7 is provided with three to four minute swirling inflow grooves 7a for swirling the liquid flow.
A swirling chamber 7b shaped like a bowl is formed at the confluence of the swirling inlets 7a, and a small-diameter nozzle 7c is transparently provided at the bottom of the swirling chamber 7b.

The above-mentioned closer 8 is made of ceramic, synthetic resin, or metal, and is made of the rotating inlet groove 7 of the nozzle tip 7.
It is for covering a.

The strainer holder 6 is made of synthetic resin, and a flow passage opening 6a is formed in the center of the spring receiving wall 6A. The outer cylinder part 6b, which is integrally molded and fixed to the spring receiving wall part 6A and extends upstream of the annuloplasty cylinder 2, is elastically fitted onto the downstream end of the annuloplasty cylinder 2, and the annular shape of the outer cylinder part 6b is The locked portion is locked by the annular locking portion of the annuloplasty tube 2, and
The spring receiving wall 6A contacts the downstream end surface of the annuloplasty tube 2 from the downstream side, and a spring receiving recess 6c is formed on the downstream end surface side of the spring receiving wall 6A.

A strainer holder 6 is placed inside the annuloplasty cylinder 2.
A first compression spring 5 is interposed between the spring receiving wall portion 6A and the valve body 4, and the valve seat portion 3, the valve body 4, and the first compression spring 5 constitute a chamber pressure valve.

A second compression spring 11 is interposed between the spring receiving recess 6c of the strainer holder 6 and the closer 8 in the nozzle body cylinder 1.
1, the closer 8 is brought into close contact with the upstream end surface of the nozzle tip 7.

A plurality of inflow ports 2a are formed in the portion of the annuloplasty cylinder 2 facing the first strainer 9 made of wire mesh.

Note that the upstream end of the nozzle body cylinder 1 and the valvuloplasty cylinder 2
A sealing O-ring 12 is attached between the nozzle tip 7 and the receiving part of the nozzle body cylinder 1, and a packing 13 is sandwiched between the nozzle tip 7 and the receiving part of the nozzle body cylinder 1.

In the above configuration, the liquid supplied into the pipe P connected to the spray nozzle N is filtered by the first strainer 9 and then flows into the valve forming cylinder 2 from the inlet 2a. When the pressure exceeds the set pressure, the chamber pressure valve opens, and when the liquid flows from the valve forming cylinder 2 into the nozzle body cylinder 1, it is filtered by the second strainer 10, and the liquid that flows into the nozzle body 1 swirls with the swirling inlet groove 7a. It is changed into a swirling flow in chamber 7b,
The swirling spray is sprayed from the nozzle 7c.

Incidentally, the spray nozzle N according to the above embodiment can be partially modified as follows.

(1) Connect the upstream end inlet 2a of the annuloplasty tube 2 to the annuloplasty tube 2.
The first strainer 9 is provided on the upstream end wall 2b of the strainer.

(2) Various existing structures may be adopted as the structure of the chamber pressure valve.

(3) The outer cylinder portion 6b of the strainer holder 6 is omitted.

(4) As the swirling flow adding mechanism consisting of the closer 8, the swirling inlet groove 7a, and the swirling chamber 7b, various existing mechanisms other than the one shown in the drawings may be used.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a fine mist spray nozzle with a two-stage strainer according to an embodiment. N... Fine mist spray nozzle with two-stage strainer,
DESCRIPTION OF SYMBOLS 1... Nozzle main body cylinder, 2... Valve formation cylinder, 3... Valve seat part, 4... Valve body, 5... First compression spring, 6...
Strainer holder, 7... Nozzle tip, 7a...
...Swirling inflow groove, 7b...Swirling chamber, 7c...Nozzle,
8...Closer, 9...First strainer, 10...
...Second strainer, 11...Second compression spring.

Claims (1)

[Scope of utility model registration request] A nozzle chip having a swirling inflow groove, a swirling chamber, and a spout, and a closer that abuts the nozzle chip from the upstream side and covers the swirling inflow groove are attached to the downstream end of the nozzle body cylinder. A valve body is brought into contact with the valve seat portion of the annuloplasty cylinder that has been screwed together from the downstream side, a strainer holder that comes into contact with the downstream end face of the annuloplasty cylinder is provided, and a first compression spring is inserted between the strainer holder and the valve body. Further, a second compression spring is interposed between the strainer holder and the closer, a first strainer is provided at the upstream end inlet of the annuloplasty cylinder, and a second strainer is provided in the strainer holder. Fine mist spray nozzle with stepped strainer.