JPH11269950A - Flow adjuster and nozzle unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a flow adjuster and a nozzle unit which can control flow rate without decreasing the speed of fluid, are faultless and easy to clean, prevent a decrease in flow rate even when used for a long time, and facilitate subtle flow rate settings. SOLUTION: A flow adjuster comprises a nozzle unit 1 and an inflow adjustment unit 2. The nozzle unit 1 comprises an approximately columnar nozzle part 11 and a flange part 12 provided at the rear end of the nozzle part 11. The nozzle part 11 has an inflow port provided to extend from the rear end to the front end and a delivery hole 112 provided to extend from the front end face of the nozzle part 11 or a side face near the front end toward the central axis of a nozzle to communicate with the end of the inflow port. The inflow adjustment unit 2 has an approximately cylindrical insertion part 21 inserted into the inflow port to limit the flow rate of fluid entering the nozzle unit 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flow control device and a nozzle unit. More specifically, the present invention relates to a flow rate adjuster and a nozzle unit capable of controlling a flow rate without reducing the speed of a fluid.

[0002]

2. Description of the Related Art Hitherto, a flow control device which is installed in a fluid pipe to control a flow rate has been developed and used. As such a flow rate control tool, there is a flow rate control tool for conserving tap water, which is disclosed in Japanese Utility Model Laid-Open No. 5-19743 and Japanese Utility Model Publication No. 3-10894.

[0003]

SUMMARY OF THE INVENTION
The flow rate regulating water-saving valve disclosed in Japanese Patent No. 9743 has a mechanically operated spherical valve body and a spring.
There is a high possibility that a malfunction such as a malfunction may occur due to clogging of dust. In such a case, it is not easy to clean and restore the function.

[0004] Further, in both the case of the flow control piece disclosed in Japanese Utility Model Publication No. 3-10894 and the flow control water-saving valve disclosed in Japanese Utility Model Publication No. 5-19743,
If used for a long time, the water scattered backward from the outlet of the nozzle in the pipe will accumulate between the outer circumference of the top and the inner surface of the pipe, and it will gradually increase and move forward, and finally it will reach the outlet. There was also a problem that the outflow of water flowing out of the outlet was obstructed.

[0005] Furthermore, stainless steel or the like is generally used as a material for these appliances, but when used for hot spring water or seawater, an expensive material such as titanium must be used. In addition, these water-saving devices have to be provided with different types of devices for each required flow rate per unit time, and it is difficult to achieve both delicate flow setting and manufacturing cost.

The present invention has been made to solve the above problems, and can control the flow rate without lowering the speed of the fluid, and has a small number of troubles, is easy to clean, and can be used for a long time. It is an object of the present invention to provide a flow rate adjusting tool and a nozzle unit in which the flow rate does not decrease and fine flow rate setting is easy.

[0007]

According to a first aspect of the present invention, there is provided a nozzle unit which is provided in a fluid pipe and adjusts a flow rate of the fluid, wherein a fluid taken in from an upstream through an inlet hole has a substantially spherical surface. Nozzle unit that discharges the fluid as a plurality of flows that do not interfere with each other from a plurality of discharge holes provided downstream and that does not accumulate fluid between the outer peripheral surface and the inner surface of the pipe It is.

According to a second aspect of the present invention, there is provided a nozzle unit comprising a substantially columnar nozzle portion and a flange portion provided at a rear end of the nozzle portion, wherein the nozzle portion is arranged from the rear end to the front end. And a discharge hole provided from the front end surface or a side surface near the front end of the nozzle portion toward the nozzle center axis and communicating with the front end portion of the inflow hole. The hole is provided at a predetermined angle of 90 degrees or less with respect to the front in the nozzle central axis direction, the inner surface at the tip of the inflow hole is provided in a substantially spherical shape, and a plurality of the discharge holes are provided. A nozzle unit characterized in that:

Here, the discharge hole provided from the "front end face of the nozzle portion or the side surface near the front end" toward the nozzle center axis has an opening on the front side thereof covering both the front end face and the side face of the nozzle portion. It may be provided. The “nozzle center axis” is the center axis of the nozzle portion provided in a substantially columnar shape.

[0010] The nozzle unit according to a third aspect is the nozzle unit according to the second aspect, wherein the four discharge holes are provided at substantially equal angles with respect to the center axis of the nozzle. It is.

According to a fourth aspect of the present invention, there is provided a nozzle unit, comprising a substantially columnar nozzle portion and a flange portion provided at a rear end of the nozzle portion, wherein the nozzle portion is arranged from the rear end to the front end. And a discharge hole provided from the front end surface or a side surface near the front end of the nozzle portion toward the nozzle center axis and communicating with the front end portion of the inflow hole. The hole is provided at a predetermined angle of 90 degrees or less with respect to the front in the direction of the central axis of the nozzle, and a discharge groove from the vicinity of the rear end of the nozzle to the opening of the discharge hole is formed on the side of the nozzle. It is a nozzle unit characterized by being provided.

According to a fifth aspect of the present invention, in the nozzle unit of the fourth aspect, the discharge groove has a width substantially equal to the width of the opening of the discharge hole at the position of the opening of the discharge hole. The nozzle unit is provided to be narrower than the width of the opening of the discharge hole near the rear end of the nozzle portion.

The nozzle unit according to a sixth aspect is the nozzle unit according to the fourth aspect, wherein an angle formed by the discharge hole with the central axis of the nozzle is 50 to 55 degrees.

According to a seventh aspect of the present invention, in the nozzle unit of the fourth aspect, the nozzle portion has a substantially cylindrical shape having an outer diameter of 8 to 20 mm, and the discharge groove has a width of 2 to 6 mm. And a depth of 1.3 to 1.7 mm.

According to an eighth aspect of the present invention, in the nozzle unit according to the fourth aspect, a portion of the opening on the nozzle surface side of the discharge hole on the nozzle central axis side is located forward in the nozzle central axis direction. On the other hand, the nozzle unit is surrounded by the virtual cylinder curved surface toward the nozzle central axis at a predetermined angle smaller than the angle of the discharge hole. The nozzle unit according to claim 9 is
10. The nozzle unit according to claim 9, wherein the angle formed by the virtual cylinder with the center axis of the nozzle is 10 to 14 degrees.

According to a tenth aspect of the present invention, there is provided a nozzle unit comprising a substantially columnar nozzle portion and a flange portion provided at a rear end of the nozzle portion, wherein the nozzle portion is arranged from the rear end to the front end. And a discharge hole provided from the front end surface or a side surface near the front end of the nozzle portion toward the nozzle center axis and communicating with the front end portion of the inflow hole. The hole is provided at a predetermined angle of 90 degrees or less with respect to the front in the direction of the nozzle center axis, and the nozzle unit is characterized in that the angle of the outer periphery of the front end face is reduced. is there.

A nozzle unit according to an eleventh aspect is a nozzle unit comprising a substantially columnar nozzle portion and a flange portion provided at a rear end of the nozzle portion, wherein the nozzle portion is arranged from the rear end to the front end. And a discharge hole provided inward from the front end face or side surface of the nozzle portion and communicating with the tip end of the inflow hole,
A nozzle unit whose surface is covered with a high-performance fluororesin (trade name “Teflon”).

According to a twelfth aspect of the present invention, there is provided a flow rate adjusting device comprising a nozzle unit and an inflow amount adjusting unit, wherein the nozzle unit has a substantially columnar nozzle portion.
A flange portion provided at a rear end of the nozzle portion, wherein the nozzle portion has an inflow hole provided from the rear end toward the front end, and a nozzle center axis extending from a front end surface of the nozzle portion or a side surface near the front end. And a discharge hole that is provided toward the front end of the inflow hole and communicates with a tip end of the inflow hole. The inflow amount adjusting unit substantially restricts a flow rate of a fluid that is inserted into the inflow hole and enters the nozzle unit. It is a flow rate adjuster characterized by having a cylindrical insertion portion.

According to a thirteenth aspect of the present invention, there is provided a flow rate adjusting device.
3. The flow control device according to item 2, wherein the insertion portion is provided with resin.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. (1) Configuration of Flow Control Tool As shown in FIGS. 1 and 2, a flow control tool according to an embodiment of the present invention includes a nozzle unit 1, an inflow control unit 2,
Consists of The nozzle unit 1 is made of stainless steel. As shown in FIGS.
It comprises a flange portion 12 provided at the rear end of the nozzle portion 11. The nozzle 11 has a diameter of 11 mm and a length of 17.5 mm
And the flange portion 12 has a nozzle portion 1
It is provided on the outer periphery of one rear end with a thickness of 2 mm and an outer diameter of 16.5 mm.

As shown in FIG. 4, the nozzle portion 11 extends from the center of the rear end face 11R along the nozzle center axis to the front end face 1R.
It has an inflow hole 111 toward 1F. This inflow hole 1
Reference numeral 11 has a diameter of 6.4 mm, and the inner surface of the tip is provided in a substantially spherical shape (not shown in the cross section of FIG. 4).

As shown in FIGS. 3 and 4, the side face 11 of the nozzle portion 11 1.37 mm behind the tip face 11F.
A discharge hole 112 is provided centering on the position on S and extending obliquely rearward from the position toward the central axis of the nozzle. The discharge hole 112 is a circular hole having a diameter of 4 mm.
The opening 112O on one surface is the side surface 1 of the nozzle portion 11.
Not only 1S but also partly on the front end face 11F. The discharge hole 112 is located at 5
The nozzles are provided at an angle of 2.5 degrees from the opening 112O toward the nozzle central axis obliquely rearward. This discharge hole 1
Numeral 12 communicates with the tip of the inflow hole 111 inside the nozzle portion 11.

Further, as shown in FIGS. 3, 4 and 5, the opening 112O has a substantially cylindrical surface at a portion near the nozzle center axis. The virtual cylinder defined by the cylindrical surface 112C has a diameter of 4 mm and is inclined at an angle of 12 degrees with respect to the front of the nozzle center axis toward the nozzle center axis obliquely rearward.

Further, as shown in FIG. 5, a guide groove 113 having a substantially conical surface extending from a position 0.5 mm from the center toward the opening 112O of the discharge hole 112 is provided on the front end face 11F. The guide groove 113 has an apex on the side of the center of the front end face 11F, expands toward the opening 112O, and the width of the part reaching the opening 112O is substantially the same as the width of the opening 112O. However, the apex is provided in a spherical shape of SR0.3. The angle of the maximum inclination line of the substantially conical slope of the guide groove 113 with respect to the front end face 11F is 20 degrees. The guide groove 113 and the cylindrical surface 112
The boundary line 113B with C is located closest to the nozzle center axis and at a position 2 mm from the nozzle center axis (when the distance is measured in a direction perpendicular to the nozzle center axis).

As shown in FIGS. 3 and 5, the side surface 11S of the nozzle portion 11 is 3.5 mm from the rear end surface 11R.
A discharge groove 114 extending from the position to the opening 112O is provided. This discharge groove 114 has a depth of 1.5 mm,
As shown in FIG. 5, the connecting portion between the side surface and the bottom surface of the groove is provided with a radius. And, as shown in FIG.
8. From the connection portion with the opening 112O, from the tip end face 11F to 9.
It is provided with a width of 5 mm up to the position of 5 mm, from which the width is reduced by R1 mm on both sides, and becomes 3 mm wide at the rear of the nozzle portion 11. Both ends of the rear end face 11R side are R1m on both sides.
It is provided with a radius in m. The radius of the connection between the side and bottom of the groove is R1.5
mm and R1 mm in a portion having a width of 3 mm (see FIG. 5).

The discharge holes 112 and the discharge holes 112
As shown in FIG. 5, four sets of guide grooves 113 and discharge grooves 114 are provided, each having a uniform angle of 90 degrees with respect to the center axis of the nozzle. In addition, the outer periphery (side surface 1) of the tip end surface 11F of the nozzle portion 11
The portion connected to 1S) is chamfered at 11.5 mm (chamfered portion 11C in FIGS. 3 and 5). The surface of the nozzle unit 1 is coated with a high-performance fluororesin.

On the other hand, the inflow amount adjusting unit 2 is made of resin, and as shown in FIGS.
And a flange portion 22 provided at the rear end of the insertion portion 21. The insertion portion 21 has an outer diameter of 6.4 mm and a height of 6.5 m.
m cylinder. The center hole 211 is provided with an arbitrary diameter, and for example, 11 types can be provided from 1 mm to 6 mm in 0.5 mm increments. In addition, the flange portion 22
Has a thickness of 2 mm and an outer diameter of 16.5 around the rear end of the insertion portion 21.
mm.

As shown in FIGS. 1 and 8, the insertion portion 21 of the inflow amount adjusting unit 2 is inserted into the inflow hole 111 from the rear of the nozzle unit 1, and the two are combined. It is composed.

(2) Method of Using Flow Control Tool The flow control tool of this embodiment is inserted from the end of the body B partially inserted into the valve V of the faucet as shown in FIG. Install and use. Water that has passed through the valve in the valve portion V collides with the flange portion 22 located behind the flange portion 12 and is blocked, and almost all is introduced into the center hole 211 (see FIG. 2). . Since the center hole 211 communicates with the inflow hole 111 of the nozzle unit 1, water introduced into the center hole 211 discharges from the inflow hole 111 to the discharge holes 112, 112, 1.
12, 112, the openings 112O, 112O, 11
Discharged from 2O, 112O.

Here, as described above, since a plurality of types of inflow rate adjustment units 2 are provided in a range of 1 to 6 mm in increments of 0.5 mm with respect to the diameter of the center hole 211, the user needs the required discharge. The type of the inflow amount adjusting unit 2 can be selected according to the amount, and can be used in combination with the nozzle unit 1. In addition, since the inflow rate adjustment unit 2 is made of resin, a fine flow rate adjustment that cannot be performed in increments of 0.5 mm can be handled by cutting and expanding the center hole 211 of the inflow rate adjustment unit 2 appropriately selected. can do. Furthermore, by using the nozzle unit 1 alone without using the inflow amount adjustment unit 2, the water intake is maximized, and the discharge amount can be maximized.

(3) Effect of Flow Rate Control Tool In the nozzle unit 1 of the present embodiment, the diameter of the nozzle 11 is 11 mm and the diameter of the flange is 16.5 mm. Part (inner diameter is 1
(Approx. 3 mm). The diameter of the nozzle portion 11 is 2 m larger than the inner diameter of the body portion.
The same effect can be obtained by providing a value in a range from a value smaller than about m to less than the inner diameter of the body, the diameter of the flange part larger than the inner diameter of the body, and smaller than the inner diameter of the valve part.

In the nozzle unit 1 of this embodiment, the direction of the discharge hole 112 is 52.5 degrees with respect to the front, and
mm, and four of these nozzles are provided at equal intervals, so that the nozzle portion 11 of the above-described size used for a water tap can suitably save water without impairing usability.
Note that the direction of the discharge hole 112 is from 51.5 degrees to 53.5 degrees.
If the degree and the diameter are 3.5 to 4.5 mm, substantially the same effect can be obtained.

Since the nozzle center axis side of the discharge hole 112 is surrounded by a cylindrical surface 112C at an angle of 12, the water discharged from the discharge hole 112 effectively removes the water in the discharge groove 114 at the rear part. While pulling out, 11
Discharged forward along 2C. In addition, if the direction of the cylindrical surface 112C is set to 11 degrees to 13 degrees, substantially the same effect can be obtained.

Further, since the nozzle unit 1 of this embodiment is provided with the guide groove 113 on the front end face 11F, the discharge hole 1
The water discharged in the direction from 12 toward the central axis of the nozzle,
It can be effectively turned forward. In addition, since the surface of the nozzle unit 1 of this embodiment is covered with a high-performance fluororesin, the insertion portion 21 of the inflow amount adjusting unit 2 made of resin is used.
Also, when inserting or pulling out the inflow hole 111, there is little friction, and attachment and detachment are easy. Therefore, it is easy to change the nozzle unit 1 and a plurality of types of inflow amount adjustment units 2.

After immersing ten nozzle units 1 in 1 liter of tap water, the Japan Water Works Association "Regulations, Rules and Examination Standards for Appliances Related to Water Supply Equipment"
Annex 1. As a result of performing a dissolution test of equipment related to a water supply device, turbidity was less than 1 degree, chromaticity was less than 1 degree, there was no abnormality in odor and taste, residual chlorine was 0.5 mg / L, hexavalent chromium was 0.005 mg. / L, iron was 0.01 mg / L. Regarding raw water, Appendix 1 of the Japan Water Works Association "Regulations, Rules and Examination Standards Related to Water Supply Equipment". As a result of performing a dissolution test of equipment related to a water supply device, turbidity was less than 1 degree, chromaticity was less than 1 degree, there was no abnormality in odor and taste, residual chlorine was 0.6 mg / L, hexavalent chromium was 0.005 mg. / L, iron was 0.01 mg / L. That is, the nozzle unit 1 of the present embodiment can be used safely.

[0036]

According to the flow control device of the present invention, in the production of a polymerizable liquid, polymerization of the polymerizable liquid at an unexpected location is less likely to occur. That is, since the nozzle unit according to the first aspect of the invention takes in the fluid taken in from the upstream through the inflow hole and discharges it through the discharge hole, the size of the inflow hole is made appropriate, so that the fluid in the pipe is Can be controlled per unit time.

In the nozzle unit according to the first aspect of the present invention, since the fluid taken in from the upstream flows in a substantially spherical shape inside, the speed of the fluid taken in from the upstream is increased, and the fluid is evenly distributed. Discharge can be performed from a plurality of discharge holes by distributing them in close amounts. Therefore, even if the flow rate per unit time is reduced, the momentum of the fluid does not decrease.

Further, the nozzle unit according to claim 1 is
Since the fluid is discharged as a plurality of flows that do not interfere with each other, it is possible to prevent a decrease in the speed of the fluid due to interference of the flow after the discharge. Furthermore, in the nozzle unit according to the first aspect, since the fluid does not accumulate around the nozzle unit, the speed (flow rate per unit time) of the fluid discharged from the accumulated fluid does not decrease, and the nozzle unit can be used for a long time. Even if used, the flow rate does not decrease.

Since the nozzle unit according to the second aspect includes the substantially columnar nozzle portion and the flange portion provided at the rear end of the nozzle portion, the flow of the fluid can be controlled at the nozzle portion, and the flange portion can be controlled. Thereby, it can be locked to the uneven portion in the fluid pipe. Then, the fluid in the fluid pipe can be blocked by the flange portion, and the fluid flowing in the fluid pipe can be guided to the inflow hole of the nozzle portion.

In the nozzle unit according to the second aspect, the inflow hole provided at the rear end and the plurality of discharge holes provided from the front end face or the side face are provided so as to communicate with each other. Fluid is discharged from the plurality of discharge holes. And the nozzle unit of claim 2 is
Since it is not based on a mechanical structure having an operating portion as in the conventional flow rate adjusting device, there is a low possibility that dust will be clogged during use and a failure will occur, and cleaning when dust is clogged is also easy.

The effect of the nozzle unit according to claim 2 described above is also provided in the nozzle unit according to claims 4, 10, 10 and 11 and 12 as well.

In the nozzle unit according to the second aspect, the discharge hole is directed toward the nozzle center axis at a predetermined angle of 90 degrees or less with respect to the front in the nozzle center axis direction. The fluid can be discharged forward without damaging the momentum of the fluid that has entered through the inflow hole. The same effect is obtained in claims 4 and 1
No. 0 is also provided.

Further, the nozzle unit according to claim 2 is
Since the inner surface of the distal end of the inflow hole is provided in a substantially spherical shape, the speed of the fluid is increased by flowing the fluid along the inner wall. By discharging the fluid from the plurality of discharge holes, the flow rate is reduced, but the momentum of the fluid does not decrease. For example, even when a person touches the flow, the usability does not decrease because the momentum of the fluid does not decrease due to the decrease in the flow rate.

Further, since each discharge hole is provided at a predetermined angle, the fluid passing through the discharge hole is rectified by the time it reaches the opening of the discharge hole, and is discharged from the opening to form a unique flow. I do. Then, the respective flows of the discharged fluid rotate to the right with respect to the direction of movement due to the Coriolis force, so that the feeling of use is not impaired.

In the nozzle unit according to the third aspect, since there are four discharge holes, a sufficient hole area, that is, an outflow amount of the fluid can be secured. Since a plurality of discharge holes are provided at substantially equal angles to each other, the fluid discharged from each discharge hole flows while maintaining the speed at the time of discharge without interfering with each other.

In the nozzle unit according to the fourth aspect, a discharge groove extending from the vicinity of the rear end of the nozzle portion to the discharge hole is provided on the side surface. For this reason, of the fluid accumulated around the rear side surface of the nozzle unit by continuous use in the fluid pipe, the fluid in the discharge groove can be effectively drawn out by the fluid discharged forward from the discharge hole.
For this reason, fluid accumulated around the rear side surface of the nozzle unit is sequentially discharged through the discharge groove. Therefore, even if the nozzle unit is installed in the fluid pipe and the fluid continues to flow, the fluid does not accumulate around the rear portion of the nozzle unit. Therefore, the discharge flow rate does not decrease even if the use is continued in the pipe.

According to a fifth aspect of the present invention, the discharge groove of the nozzle unit has a width substantially similar to the width of the opening of the discharge hole at the position of the opening of the discharge hole, and the width of the opening of the discharge hole near the rear end of the nozzle portion. It is provided narrow. For this reason, the amount of fluid in the discharge groove is sufficiently small with respect to the force of the fluid discharged from the discharge hole acting on the fluid in the discharge facility to draw out the fluid in the discharge facility, and the fluid in the discharge groove is effectively drawn out. be able to. Therefore, the liquid accumulated between the outer periphery of the nozzle unit and the inner wall of the pipe can be sequentially and effectively discharged forward through the discharge groove.

In the nozzle unit according to the sixth aspect, the angle formed between the discharge hole and the central axis of the nozzle is 50 to 55 degrees. Therefore, the fluid can be discharged forward without killing the momentum of the fluid that has entered the inflow hole. At the same time, the fluid in the discharge groove near the opening of the discharge hole can be effectively drawn forward by the flow of the fluid discharged from the discharge hole. As a result, the fluid in the discharge groove can be effectively discharged forward. In order not to kill the momentum of the fluid, it is preferable that the angle between the discharge hole and the central axis of the nozzle is as small as possible. On the other hand, if the angle is too small, the effect of drawing out the fluid in the discharge groove becomes small. . 50
The range of -55 degrees suitably satisfies both functions.

The nozzle unit according to the seventh aspect has a substantially cylindrical shape with an outer diameter of the nozzle portion of 8 to 20 mm. For this reason, the outer diameter of the nozzle part is provided substantially in the same manner as the inner diameter of the water pipe of the faucet to be used, and the outer diameter of the flange part is larger than the inner diameter of the water pipe. By installing this nozzle unit at the location where the faucet water pipe is connected, by locking it to the end of the water pipe, and using it to adjust the flow rate of tap water Can be.

According to the nozzle unit of the present invention, the discharge groove has a width of 2 to 6 mm and a depth of 1.3 to 1.7 m.
m. Therefore, when used for adjusting the flow rate of tap water, the ratio of the amount of water existing in the discharge groove to the amount of water accumulated around the rear portion of the nozzle unit is preferable, and the ratio is effectively accumulated around the rear portion of the nozzle portion. Water can be drained.

In the nozzle unit according to the eighth aspect, the opening of the discharge hole is formed near the central axis of the nozzle. For this reason, the direction (angle) of the discharge hole is set to a preferable angle from the viewpoint of the function that the fluid discharged from the discharge hole draws out the fluid in the discharge groove at the rear portion, and further, the nozzle center of the opening is adjusted. The angle of the inner wall on the shaft side is set to a smaller angle with respect to the central axis of the nozzle, so that the fluid can be discharged forward without losing the forward force of the fluid.

According to a ninth aspect of the present invention, the angle formed by the virtual cylinder surrounding the discharge hole with the center axis of the nozzle is 10 to 1.
4 degrees. For this reason, the fluid discharged from the discharge hole can be suitably discharged forward without losing momentum.

If the pipe for mounting the nozzle unit is bent immediately at a distance shorter than the length of the nozzle unit from the mounting position of the nozzle unit, the corner of the outer periphery of the front end of the nozzle unit comes into contact with the inner surface of the pipe, and the nozzle unit is moved. Cannot be installed. If the length of the nozzle unit itself is shortened, it can be mounted in such a case, but if the length of the nozzle unit is shortened, the rectification effect decreases accordingly. Further, when used in combination with an inflow amount adjusting unit described later, the depth of the insertion hole for inserting the insertion portion of the flow rate adjusting unit becomes short, and it becomes difficult for the nozzle unit to hold the flow rate adjusting unit.

However, in the nozzle unit according to the tenth aspect, since the outer peripheral corner of the front end face of the nozzle portion is reduced,
Even if the pipe to which the nozzle unit is attached starts to bend at a distance shorter than the length of the nozzle unit from the nozzle unit mounting position, the corner of the front end of the nozzle unit is within the pipe inner surface if within a predetermined distance and R. Never hit. Therefore, there is a high degree of freedom in attachment to piping. Then, unlike the case where the nozzle unit itself is shortened, the rectifying effect is not reduced, and it is not difficult to hold the flow rate adjusting unit.

The surface of the nozzle unit according to the eleventh aspect is covered with a highly functional fluororesin. Therefore, it is difficult to reduce the speed of the fluid due to friction with the fluid. In addition, the high-performance fluororesin has excellent stability and chemical resistance, and can be used for controlling the flow rate of various liquids. For example, it can be used for seawater or hot spring water.

According to a twelfth aspect of the present invention, there is provided a flow rate adjusting device comprising a nozzle unit and an inflow amount adjusting unit. For this reason, by appropriately setting the inner diameter of the cylinder of the insertion portion of the inflow amount adjusting unit, the amount of fluid flowing into the flow rate adjusting device can be adjusted, and accordingly, the amount of fluid discharged by the flow rate adjusting device can be adjusted. Can be adjusted. Furthermore, if a plurality of types of inflow amount adjustment units are provided for one type of nozzle unit according to the inflow amount, an appropriate inflow amount adjustment unit can be combined with the nozzle unit as necessary, and various flow rates can be adjusted. Can be controlled according to the requirements of (1).

According to a thirteenth aspect of the present invention, the insertion part is provided with a resin. For this reason, it can be easily fitted to the nozzle unit, and if provided with a predetermined fit, there is no need to particularly provide a means for fixing the two.
Further, since the insertion portion is provided with resin, removal processing such as cutting and grinding can be easily performed even after manufacturing. Therefore, a delicate adjustment of the inflow amount is possible, and it is possible to mount the flow rate adjusting tool while performing fine flow rate adjustment.

[Brief description of the drawings]

FIG. 1 is a side view of a flow control device of the present invention.

FIG. 2 is a cross-sectional view of the flow control device of the present invention.

FIG. 3 is a side view of the nozzle unit of the present invention.

FIG. 4 is a sectional view of the nozzle unit of the present invention.

FIG. 5 is a front view of the nozzle unit of the present invention.

FIG. 6 is a side view of the inflow amount adjusting unit.

FIG. 7 is a front view of the inflow amount adjusting unit.

FIG. 8 is an explanatory diagram showing a usage mode of the flow rate adjusting device.

[Explanation of symbols]

1; Nozzle unit, 11; Nozzle part, 11R; Rear end face, 11F; Front end face, 11S; Side face, 11C;
111; inflow hole, 112; discharge hole, 112O; opening, 1
12C; cylindrical surface, 113; guide groove, 113B; boundary line, 114; discharge groove, 12; flange, 2; inflow control unit, 21; insertion part, 211; center hole, 22; flange, C1; Center line of hole, C2: Center line of virtual cylinder, V: Valve part, B: Body.

Claims (13)

[Claims] 1. A nozzle unit installed in a fluid pipe for adjusting a flow rate of a fluid, wherein a fluid taken in from an upstream through an inflow hole is made to flow in a substantially spherical shape inside, and is provided downstream. A nozzle unit that discharges from the plurality of discharge holes as a plurality of flows that do not interfere with each other and that does not accumulate fluid between the outer peripheral surface and the inner surface of the pipe. 2. A nozzle unit comprising a substantially columnar nozzle portion and a flange portion provided at a rear end of the nozzle portion, wherein the nozzle portion has an inflow hole provided from the rear end toward the front end. And a discharge hole provided from a front end surface or a side surface near the front end of the nozzle portion toward the nozzle center axis and communicating with a tip end portion of the inflow hole, wherein the discharge hole is in a nozzle center axis direction. A predetermined angle of 90 degrees or less with respect to the front of the inflow hole, the inner surface at the tip of the inflow hole is provided in a substantially spherical shape, and a plurality of the discharge holes are provided. Nozzle unit. 3. The nozzle unit according to claim 2, wherein the four discharge holes are provided at substantially equal angles about the center axis of the nozzle. 4. A nozzle unit comprising a substantially columnar nozzle portion and a flange portion provided at a rear end of the nozzle portion, wherein the nozzle portion has an inflow hole provided from the rear end toward the front end. And a discharge hole provided from a front end surface or a side surface near the front end of the nozzle portion toward the nozzle center axis and communicating with a tip end portion of the inflow hole, wherein the discharge hole is in a nozzle center axis direction. And a discharge groove extending from the vicinity of the rear end of the nozzle portion to the opening of the discharge hole is provided on the side surface of the nozzle portion. Nozzle unit. 5. The discharge groove has a width substantially equal to the width of the discharge hole at the position of the discharge hole, and is narrower than the width of the discharge hole near the rear end of the nozzle portion. The nozzle unit according to claim 4, wherein: 6. The nozzle unit according to claim 4, wherein an angle between the discharge hole and the central axis of the nozzle is 50 to 55 degrees. 7. The nozzle portion has a substantially cylindrical shape having an outer diameter of 8 to 20 mm, and the discharge groove has a width of 2 to 6 mm and a depth of 1.3 to 1.7.
The nozzle unit according to claim 4 provided in mm. 8. The nozzle center axis side portion of the opening on the nozzle surface side of the discharge hole has a predetermined angle smaller than the angle of the discharge hole with respect to the front of the nozzle center axis direction. The nozzle unit according to claim 4, wherein the nozzle unit is surrounded by the curved surface of the virtual cylinder toward the central axis of the nozzle. 9. The nozzle unit according to claim 8, wherein the angle formed by the virtual cylinder with the center axis of the nozzle is 10 to 14 degrees. 10. A nozzle unit comprising a substantially columnar nozzle portion and a flange portion provided at a rear end of the nozzle portion, wherein the nozzle portion has an inflow hole provided from the rear end to the front end. And a discharge hole provided from a front end surface or a side surface near the front end of the nozzle portion toward the nozzle center axis and communicating with a tip end portion of the inflow hole, wherein the discharge hole is in a nozzle center axis direction. The nozzle unit is provided at a predetermined angle of 90 degrees or less with respect to the front of the nozzle unit, and the angle of the outer periphery of the front end surface of the nozzle portion is reduced. 11. A nozzle unit comprising a substantially columnar nozzle portion and a flange portion provided at a rear end of the nozzle portion, wherein the nozzle portion has an inflow hole provided from the rear end toward the front end. And a discharge hole provided inward from the front end surface or side surface of the nozzle portion and communicating with the front end portion of the inflow hole, the surface of which is covered with a high-performance fluororesin. Nozzle unit. 12. A flow rate adjusting device comprising a nozzle unit and an inflow amount adjusting unit, the nozzle unit comprising: a substantially columnar nozzle portion; and a flange portion provided at a rear end of the nozzle portion. The nozzle portion is provided from the rear end to the front end, and is provided from the front end surface or a side surface near the front end of the nozzle portion toward the nozzle center axis, and communicates with the tip portion of the inflow hole. And a discharge hole, wherein the inflow amount adjustment unit has a substantially cylindrical insertion portion that restricts the flow rate of the fluid that enters the nozzle unit by being inserted into the inflow hole. Utensils. 13. The flow control device according to claim 12, wherein the insertion portion is provided with a resin.