JPH0344268Y2 - - 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 swirling 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 internally screwed into the upstream end of the nozzle body cylinder, and the nozzle A cylindrical inner collar is sandwiched between the downstream end face of the annuloplasty tube and the closer in the main body cylinder, and a compression spring is interposed between the valve body and the spring receiving part of the inner collar. A first strainer is provided at the inlet at the upstream end, and a cylindrical second strainer is provided on the inner peripheral side of the inner collar corresponding to the flow passage opening in the peripheral wall of the inner collar.

(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 attached to the valvuloplasty tube that is screwed into the nozzle body tube. Therefore, it is pressed into contact with the nozzle tip via the inner collar. 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. A swirling flow is formed in the swirling chamber, and 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 a second strainer is installed on the inner collar that is sandwiched between the inner collar and the closer, foreign matter that has passed through the first strainer and algae that has grown inside the valvuloplasty tube are captured by the second strainer. It can significantly reduce the frequency of clogging of grooves and nozzles, and reduce the number of times of disassembly and cleaning.

Furthermore, since the cylindrical second strainer is provided on the circumferential side of the cylindrical inner collar, a sufficient filtration area of the second strainer can be ensured and its filtration performance can be ensured over a long period of time.

(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 compression spring 5 that elastically biases the valve body 4 against the valve seat 3, and a nozzle body cylinder. a nozzle tip 7 installed in the downstream end of the nozzle tip 1; a closer 8 that contacts the upstream end surface of the nozzle tip 7; A first strainer 9 is attached to the collar 11, a first strainer 9 is disposed on the upstream side of approximately 1/2 of the annuloplasty cylinder 2, and a first strainer 9 is attached to the inner circumferential side of the inner collar 11 corresponding to the flow passage opening 12 in the circumferential wall of the inner collar 11. It is equipped with a cylindrical second strainer 10 and the like.

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 inflow grooves 7a, and a small-diameter nozzle 7c is 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 inner collar 11 is composed of an inner collar body 11A made of metal or synthetic resin and an elastic ring body 11B made of an elastic material such as rubber or synthetic resin. A channel opening 13 is formed in the center of the spring receiving wall 11b, which contacts the downstream end surface, and an outer cylinder 11c is integrally formed upward from the outer periphery of the spring receiving wall 11b. The cylindrical portion 11c is elastically fitted onto the downstream end of the annuloplasty tube 2, and the ring-shaped protrusion on the outer periphery of the annuloplasty tube 2 is fitted into the ring groove on the inner periphery of the outer cylindrical portion 11c. An inner collar main body 11A is removably attached to the downstream end of the annuloplasty tube 2.

The cylindrical portion 11d of the elastic ring body 11B is fitted into the downstream end of the inner collar body 11A, and
The collar portion 11e of the elastic ring body 11B is compressed between the downstream end surface of the inner collar body 11A and the upstream end surface of the closer 8.

When the annuloplasty tube 2 is internally fitted into the nozzle body tube 1, the inner collar body 11A and the elastic ring body 11B can be attached as described above depending on the tightness of the screw engagement. And this elastic ring body 11B
The closer 8 is elastically biased and brought into contact with the nozzle tip 7 by the elastic force of the nozzle tip 7.

A plurality of passage openings 12 are formed in the peripheral wall portion of the middle part of the inner collar body 11A, and the inner collar body 1 corresponds to these passage openings 12.
A second strainer 1 made of cylindrical wire mesh is installed on the inner circumferential side of 1A.
0 is attached.

In addition, the inner collar body 11A and the elastic ring body 11B
After the second strainer 10 is installed, it may be fixed integrally with the second strainer 10 by adhesive.

Spring receiving wall portion 11 of the inner collar main body 11A
A compression spring 5 is interposed between b and the valve body 4, and the valve seat portion 3, the valve body 4, and the compression spring 5 constitute a constant pressure valve.

A plurality of inflow ports 14 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 15 is attached between the nozzle tip 7 and the receiving portion of the nozzle body cylinder 1, and a packing 16 is sandwiched between the nozzle tip 7 and the receiving portion 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 14. When the pressure exceeds the set pressure, the chamber pressure valve opens, and after flowing from the valving tube 2 into the nozzle body tube 1, the liquid is filtered by the second strainer 10, and the liquid flowing into the nozzle body 1 outside the inner collar 11 is swirled into the nozzle body 1. It is converted into a swirling flow by the groove 7a and the swirling chamber 7b, and is sprayed as a swirling spray 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 14 of the annuloplasty tube 2 to the annuloplasty tube 2.
The first strainer 9 is provided on the upstream end wall 2a of the strainer.

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

(3) Omit the elastic ring 11B and use the inner collar 11
are integrally formed using synthetic resin or the like.

(4) As the swirling flow adding mechanism consisting of the closer 8, the swirling inflow 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. 1... Nozzle body cylinder, 2... Valve formation cylinder, 3...
Valve seat portion, 4... Valve body, 5... Compression spring, 7... Nozzle tip, 7a... Swivel inflow groove, 7b... Swivel chamber, 7c... Spout, 8... Closer, 9... First
Strainer, 10...Second strainer, 11...
Inner collar, 11A...Inner collar body, 1
1B...Elastic ring body, 11b...Spring receiving wall part, 12
...Flow path opening.

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 tube that is internally fitted and screwed together from the downstream side, and a cylindrical inner collar is sandwiched between the downstream end surface of the annuloplasty tube and the closer in the nozzle main body cylinder, A compression spring is interposed between the valve body and the spring receiving part of the inner collar, a first strainer is provided at the upstream end inlet of the valvuloplasty cylinder, and the inner collar corresponds to the flow passage opening in the peripheral wall of the inner collar. A fine mist spray nozzle with a two-stage strainer, characterized in that a second cylindrical strainer is provided on the inner peripheral side of the nozzle.