KR20000028959A - Water jet nozzle - Google Patents

Abstract

PURPOSE: A water jet nozzle is provided to have an excellent water speed of jetted water current to the highest speed operation condition of 1000rpm, more than 1200rpm and even 1500rpm of a weaving machine speed and to stably put a woof thread for a long time. CONSTITUTION: A water jet nozzle is prepared with plural water jet holes(2) on a frame wall of a nozzle main body(1), and a needle(3) for employing a woof thread inside the nozzle main body is arranged on a coaxial. An orifice(9) is formed around a head of a front head of the needle, and a stabilizer for rectification having a wing for forming plural slits as a channel radially on the upper side of the orifice in the whole length of a shaft line is prepared. Herein, a partition is prepared in the shaft line between water injection holes(2), and a taper angle of an orifice member as another device is formed 15 to 35 degrees.

Description

Water jet nozzle

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water jet nozzle for wefting in a water jet loom, and in particular, a water jet capable of obtaining a high speed jet stream having excellent convergence indispensable for high speed operation. A nozzle (water jet nozzle).

The waterjet room of the automatic loom is provided with a water jet nozzle for converting the pressure water supplied from the pump into a jet stream to carry the weft and to weft the weft. The water spray nozzle includes a stabilizer for rectifying the pressure water supplied from the pump in the nozzle body, an orifice member for gradually narrowing the flow path of the pressure water downstream of the ballast, and on the coaxial axis. A needle having a threaded hole is provided. The jet stream is discharged through a gap between the reduced diameter portion of the orifice member and the outer tapered portion (diameter reduced portion) of the needle tip, and has a function of conveying the weft in the predetermined direction by the spray flow.

In the water injection nozzle, it is important to generate the injection water flow with good convergence property by making the pressure water supplied from the pump as steady as possible.

As such a weft feeding nozzle, there exist some which were described in Unexamined-Japanese-Patent No. 62-88779 and Unexamined-Japanese-Patent No. 4-18053, for example. All of these water spray nozzles are intended to obtain a jet water flow having good convergence property by keeping the supplied pressure water as steady as possible with a ballast.

Further, Japanese Laid-Open Patent Publication No. Hei 8-296151 discloses a water spray nozzle which releases a stable jet stream by providing a cavity for suppressing cavitation downstream of the ballast.

These water spray nozzles have been gradually developed and improved to the present time, and the nozzle of the initial stage has a structure as shown in FIGS. 11 and 12. 11 is a longitudinal sectional view of the nozzle body 1, reference numeral 21 denotes a supply of pressure water, 2 a water injection hole of pressure water, 1 a nozzle body, 8 a ballast, 7 an orifice member, and 7a an orifice member. Taper portion 7b is the outlet corner of the orifice member, 5 is the taper portion of the needle 3, 22 is the tip of the needle protruding from the outlet corner 7b of the orifice member, 20 is the discharge port, 23 is the blade of the ballast. Indicates.

Fig. 10A is a longitudinal sectional view of a conventional weft feeding nozzle body in which improvements have been made, Fig. 10B is a sectional view taken along the line b-b of Fig. 10A showing the ballast portion, and Fig. 10C is a sectional view taken along the line c-c of Fig. 10A showing the water injection hole. FIG. 13 is a longitudinal cross-sectional view showing a state in which a needle is disposed in the nozzle body illustrated in FIG. 10A. The ballast 8 provided in the nozzle body 1 may be formed of metal, ultrahard alloy, cermet, ceramics, or the like. It is made of a raw material and has a ring-shaped cross section in which a plurality of wings 8a arranged at a constant pitch in the circumferential direction are formed in the full length in the axial direction. Between the blades 8a, slits 8b having the same flow path shape and the same cross section of the flow path are formed. And the depth to the bottom part of the slit 8b is made close to the inner periphery of the nozzle main body 1 by the side of the water injection hole 2 provided at intervals at the edge wall of the nozzle main body 1, and to the flow of high pressure water, There is no resistance to.

The ballast 8 is formed by, for example, forming a slit of a cross-section that radially divides the internal flow path, and is intended to rectify by passing the pressure water supplied from the outside through these slits.

In addition, the relationship between the orifice member and the needle of the conventional water spray nozzle is all formed as shown in Figure 5, the taper angle (θ) that is reduced in diameter in the exit direction of the orifice member 7 is generally 6 ° to 12 degrees, especially 8 degrees to 12 degrees are used in the weaving industry. It is considered that the taper angle θ is as small as possible because the jet stream discharged through the outlet of the orifice member is concentrated at a sharp angle. Further, the taper angle α at which the tip of the needle is reduced toward the downstream side is in the range of 2 ° to 5 °, and needles having a taper angle of 5 ° are used in many cases. The length l from the outlet corner portion 7b of the orifice member to the needle tip portion 22 protruding is configured to be 1 mm to 1.5 mm.

The characteristics required for the water spray nozzle are that the flow rate of the jetting water is good and the diffusion is small, the flow rate of the jetting water is fast, the force of conveying the weft of the jetting water is strong, and the water consumption required for the wefting of the wefting water. It may be less, can cope with high-speed operation of the loom, and stable weft loading can be achieved.

All of these required characteristics are achieved by improving the convergence of the jet stream discharged from the water jet nozzle, and thus, the invention and the invention for improving the convergence have been made for many years.

However, the measures to improve the convergence up to now include the taper angle α of the needle 3 in the range of 2 ° to 5 °, and the taper angle θ of the orifice member 7 in the range of 6 ° to 12 °. Based on the concept that the smallest possible inside, the flow path design is mainly for the study of the structure and material of the ballast and for reducing the fluid resistance of the pressure water.

In the well-known weft feeding nozzle, high-pressure water injected into the nozzle through the eight water injection holes 2 shown in Fig. 10C meets at the outer circumference of the needle 3 in the collection chamber and collides with each other to create turbulence. Since it generates a pressure loss and flows to the stabilizer 8 in a disturbed turbulent state, the rectifying action by the stabilizer 8 is limited. Therefore, the conventional water jet nozzle can sufficiently cope with the operation speed of the loom of less than 1000 rpm, but the future loom speed is required to achieve not only 1000 rpm but also 1200 rpm or more and 1500 rpm. There is a problem in that weaving for a long time stable weaving for ultra-fast loom speed.

In addition, with regard to the needle shape, monomers and scales of fibers dispersed in the feed water used for circulation are attached to and deposited on the tip outer diameter portion of the tapered portion 5 of the needle 3 shown in FIG. As a result, the jetting water discharged through the gap between the tapered portion 7a of the orifice member and the needle 3 has an effect of spreading outward by the adhesion deposit at the tip end of the head 5 of the needle 3. It is received, and the direction in which the jet stream (weft) flows or the angle of flight changes, or the convergence of the jet stream is worsened.

An object of the present invention is to provide a water spray nozzle which is excellent in the convergence of the jetting water flow for the super high speed operation condition of not only 1000rpm but also 1200rpm or more, 1500rpm, and stable weft loading for a long time. .

1 is a longitudinal sectional view showing a main portion of the water spray nozzle of the present invention.

2 is a longitudinal sectional view of the nozzle body of the present invention.

3 illustrates a partition wall between the water injection hole and the water injection hole, and is taken along line a-a of FIG. 2.

4 is a longitudinal sectional view showing another configuration of the water spray nozzle of the present invention.

Figure 5 is a longitudinal sectional view showing the main portion of the orifice member and the needle of the present invention and conventional.

6 is a longitudinal sectional view of a main portion showing the configuration of the orifice member and the needle of the present invention.

7 is a longitudinal sectional view showing a diameter reduction portion of the needle tip of the present invention.

Fig. 8 is a longitudinal sectional view showing major portions of the weft inserting nozzle having two stages of a partition and a stabilizer between the water injection hole and the water injection hole of the present invention.

9 is a longitudinal cross-sectional view of principal portions for explaining the gist of the present invention.

Fig. 10A is a longitudinal sectional view of a conventional weft feeding nozzle body, Fig. 10B is a sectional view taken along line b-b of Fig. 10A showing a ballast portion, and Fig. 10C is a sectional view taken along line c-c of Fig. 10A showing a water injection hole.

Fig. 11 is a longitudinal sectional view showing a main portion of a conventional water spray nozzle.

12 is a longitudinal sectional view showing a main portion of a conventional water spray nozzle.

Fig. 13 is a longitudinal sectional view showing a main portion in which a conventional needle is mounted.

FIG. 14A is a front view illustrating a state in which the gypsum board used for evaluating the convergence of the jet stream is eroded by the jet stream, FIG. 14B is a cross-sectional view taken along line CC of FIG. 14A, and the arrow of FIG. will be.

<Description of the code | symbol about the principal part of drawing>

1.Nozzle body 2.Water injection hole

3 needles 4 thread holes

5 ... taper of needle 6 ... engaging surface of orifice member

7. Orifice member 7a ... Taper part of orifice member

7b ... Outlet corner of orifice member 8 ... Ballast

8a ... wing 8b ... slit

8c, 8d Ballast 9 Clearance

20.Outlet port 21.Pressure supply

22.The tip of the needle protruding from the exit corner

23.Blade of Stabilizer

According to a first aspect of the present invention, there is provided a plurality of water injection holes in the edge wall of the nozzle body, and coaxially mounts the weft introduction needle inside the nozzle body, and provides an orifice member around the head of the tip of the needle. A weft feeding nozzle provided with a stabilizer for rectification on the upstream side of the orifice member, wherein the partition wall is provided in the axial direction between the water injection hole and the water injection hole.

Moreover, the 2nd invention in this invention is equipped with the some water injection hole in the edge wall of a nozzle main body, coaxially mounts the weft introduction needle in the inside of a nozzle main body, and orifices around the head of the tip part of said needle. A water spray nozzle provided with a member and provided with a rectifying ballast upstream of the orifice member, characterized in that the outer diameter of the needle tip portion is reduced in diameter from the size formed by the needle taper angle. In this configuration, the partition wall may be provided in the axial direction between the water injection hole and the water injection hole.

Moreover, the 3rd invention in this invention is equipped with the some water injection hole in the edge wall of a nozzle main body, coaxially mounts the weft introduction needle in the inside of a nozzle main body, and orifice around the head of the tip part of said needle. A water spray nozzle provided with a member and further provided with a rectifier ballast upstream of the orifice member, characterized in that at least two ballasts are arranged so as to be arranged in multiple stages.

According to a fourth aspect of the present invention, there is provided a plurality of water injection holes in the edge wall of the nozzle body, coaxially mounts the weft introduction needle inside the nozzle body, and orifice member is provided around the head of the tip end of the needle. A water spray nozzle provided with a stabilizer for rectification at an upstream side of the orifice member, wherein the diameter reduction angle θ at a downstream side of the orifice member is formed at 15 ° to 35 °. . By doing in this way, compared with the conventional water spray nozzle whose taper angle (diameter reduction angle (theta)) is 6 degrees-12 degrees, it becomes possible to considerably improve the convergence of jet stream.

Further, the fifth invention of the present invention includes a plurality of water injection holes in the edge wall of the nozzle body, coaxially mounts the weft introduction needle inside the nozzle body, and orifices around the head of the tip end of the needle. In a water spray nozzle having a member and having a rectifying ballast upstream of the orifice member, the length of the needle tip portion protruding from the outlet corner portion where the downstream flow path and the downstream end surface of the orifice member intersect (l) ) And the length dimension L from the position where the extension line of the taper angle (diameter reduction angle; θ) of the flow path of the orifice member and the extension line of the taper angle (diameter reduction angle; α) of the tip of the needle cross each other. The relational expression is l = θ / 360 ° × 10L × Y, and the value of Y is in the range of 0.25 to 0.7. By doing so, the jetting water discharged through the gap between the tapered inner surface of the orifice member and the outer tapered surface of the needle tip has an effect of reducing the amount of air sucked from the seal hole 4 of the needle 3 within an appropriate range. In addition, the present invention exhibits functionality such as faster convergence than conventional water spray nozzles and a considerably superior convergence property, a strong conveying force of the weft yarn, and no water droplets that are blown out. On the other hand, further excellent nozzle performance can be exhibited by setting it as the structure which combined the 1st-5th inventions, respectively.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a longitudinal sectional view showing the main part of the water spray nozzle of the present invention, in which the needle 3 is coaxially fitted into the nozzle body 1 to which the pressure water from the plunger pump is supplied in association with the operation of the loom. have.

The hollow nozzle body 1 has a suitable number of water injection holes 2 formed at a constant pitch in the circumferential direction on the rim wall of the substantially middle portion in the axial direction thereof, so that the pressure is uniform through the water injection holes 2. Inflow of water is possible.

The needle 3 fitted inside the nozzle main body 1 penetrates the thread hole 4 of the weft yarn in the axial direction, and when fitted to the nozzle main body 1, it is rearward from the water injection hole 2. The taper part 5 is formed so that the tip may become narrow from the position corresponding to the taper angle θ (see FIG. 7). The tapered portion 5 is gradually reduced in outer diameter toward the tip side, and the tip is fitted in a state where the tip is slightly protruded from the end of the tapered portion 7a of the orifice member.

In the nozzle main body 1, the orifice member 7 and the ballast 8 shown in FIG. 10B are respectively fitted coaxially. Then, the orifice member 7 is assembled so as to correspond to the tapered portion 5 portion of the needle 3, so that an annular flow path is provided between the tapered portion 7a of the orifice member 7 and the tapered portion 5 of the needle. In the cross section, a gap 9 for increasing the pressure water to spray water is formed.

As described in the prior art, the high pressure water introduced through the water injection hole 2 meets at the outer periphery of the needle 3 in the collection chamber (the space in which the partition 10 of FIG. 1 is removed) and collides with each other to reduce the pressure. And flows to the stabilizer 8 in a turbulent turbulent state, and thus the rectification by the stabilizer 8 is limited. As a result, it is impossible to obtain a high speed jet flow and excellent flow rate. The property could not be fully satisfied.

Therefore, in the present invention, by providing the partition wall 10 in the axial direction of the nozzle body 1 between the water injection hole 2 and the water injection hole 2, there is no phenomenon that the pressure water meets and collides with each other at the needle outer peripheral part. In addition, by being rectified in advance before flowing into the ballast (8), it is almost completely rectified and passes through the gap (9) to generate a high speed jet stream of water having excellent convergence.

FIG. 2 is a longitudinal cross-sectional view of the nozzle body of the present invention, and FIG. 3 is a cross-sectional view taken along the line a-a of FIG. In addition, since the cross section of the b-b line of FIG. 2 is the same as the cross section of the ballast part shown in FIG. 10B, the description is abbreviate | omitted.

3, partition 10 is formed between the water injection hole 2 and the water injection hole 2, ie, both sides of the water injection hole exit 2a. It is preferable to bring the tip end of the partition wall 10 to a position where it does not contact the tapered portion of the needle 3.

On the other hand, the cross-sectional shape of the partition 10 preferably has a triangular tip as shown in Fig. 3, but the tip may be rectangular or the tip of the same thickness may have an arc shape. In the water spray nozzle of the present invention, by arranging the partition wall 10 between the water injection hole 2 and the water injection hole 2, the direction of the injected water can be determined, and rectification can be improved in the collection chamber. As a result, the turbulence generated in the conventional weft nozzle is greatly reduced, and since the water rectified in advance is supplied to the stabilizer 8 arranged thereafter, a fairly excellent rectification action is exhibited. Therefore, the jet stream injected from the water jet nozzle can obtain the jet stream which is more excellent in convergence than previously achieved and has a high speed.

FIG. 9 is a conceptual diagram of major portions for explaining the amount of air sucked by the jetting water flow through the threaded hole 4 of the needle 3. In Fig. 9, the jet stream flowing along the surface of the tapered portion 5 of the needle 3 is discharged in the direction of the tapered angle? Of the needle from the tip of the needle 3, immediately after being discharged. By a large amount of jetting water discharged in the direction of the taper angle θ of), it is concentrated to the same angular direction as the orifice taper angle θ shown by the dotted line from the tip of the needle 3.

Since the cone part enclosed by the dotted line from the needle tip 22 of FIG. 9 becomes a vacuum state by a high speed jet stream, it acts equivalent to the vacuum container which sucks air from the thread hole 4, and therefore, the thread hole 4 The amount of air drawn from) is proportional to the volume of the cone, surrounded by the tip of the needle and the dotted line. Therefore, the amount of air sucked from the seal hole 4 tends to increase as the taper angle θ of the orifice member 7 is smaller.

By the way, in the conventional water spray nozzle, since the taper angle (theta) of the orifice member 7 is formed in 6 degrees-12 degrees, the amount of air suctioned from the thread hole 4 of the needle 3 is more than necessary. I think it is. Since the air sucked from the seal hole 4 is mixed and discharged into the jet stream, the density of the water forming the jet stream becomes lower as the amount of air mixing increases, further weakening the conveyance force of the weft yarn.

Therefore, the conventional water jet nozzle has a large amount of air mixed in the jet stream, so that even when the rectification of the pressure stream is increased or the flow path of the pressure stream is configured to an optimal shape, it is limited to improving the convergence of the jet stream. In addition, since there are a lot of water droplets spreading from the jet stream, the impact of the warp yarn or the loom speed or weft conveyance force are insufficient for the high-speed operating conditions of the loom speed exceeding 1000 rpm. There was a flaw.

According to the present invention, by forming the taper angle θ of the orifice member 7 at 15 ° to 35 °, more preferably 15 ° to 30 °, the amount of air mixed in the jet stream can be reduced and can be considerably excellent. It can generate a jet stream having a property. In addition, since the jet stream discharged by the water spray nozzle of the present invention is very high speed and strong conveying force of the weft yarn, it is possible to insert a weft yarn for a long time stable even at ultra-high speed conditions of not only 1000 rpm but also 1200 rpm or 1500 rpm or more. do.

Figure 5 is an enlarged longitudinal sectional view of the main portion of the present invention and the conventional water spray nozzle. In Fig. 5, the inner diameter of the orifice member 7 is a discharge port in which the tapered inner surface 7a is reduced in diameter toward the downstream side at the taper angle θ, and is enlarged from the position of the outlet corner portion 7b to the outer diameter side. It is formed of 20. In addition, the tapered outer surface 5 of the needle 3 shown in FIG. 5 is reduced in diameter toward the downstream side by the taper angle α, and the tip 22 of the needle 3 is the orifice member 7. Fitting so as to protrude from the position of the outlet corner 7b of () to the position of the length l.

In the conventional water spray nozzle, the taper angle α of the needle 3 is 2 ° to 5 °, the taper angle θ of the orifice member 7 is 6 ° to 12 °, and the protruding length of the needle tip is (l) is 1 mm or more and most are comprised from 1.0 mm-1.5 mm. The projected length l of 1.0 mm to 1.5 mm is optimal in view of the long time experience and the convergence of the jet stream in the conventional water jet nozzle having a taper angle θ of 6 ° to 12 °. It is assumed that it has been employed as a dimension, and the amount of air drawn in from the thread hole 4 of the needle 3 and incorporated into the jet stream is generated, and the jet stream can be stably used for a loom speed of 1000 rpm or more, particularly 1200 rpm or more. I can't get to it.

Fig. 6 is a longitudinal sectional view of principal portions showing the construction requirements of the water jet nozzle according to another invention of the present application. In the present invention, the taper angle θ of the orifice member 7 is 15 ° to 35 °, more preferably 15 ° to 30 °, and the protruding length l of the tip of the needle is l = θ. It is comprised so that it corresponds to the relational formula which is / 360 degrees * 10L * Y. In addition, the value of Y in this formula is 0.25-0.7, More preferably, it is the range of 0.25-0.5.

Here, the dimension L shown in FIG. 6 is an exit corner of the orifice member 7 from a position where an extension line of the taper angle θ of the orifice member 7 and an extension line of the taper angle α of the needle head intersect. It is the length to the part 7b.

The protruding length l of the tip of the needle is an absolute condition that is smaller than the above-mentioned dimension L. For example, when it is larger than L, the needle is larger than the extension line of the taper angle θ of the orifice member 7 shown in FIG. As a result of the tip sticking out, the jetting stream to be converged along the taper angle θ collides with the needle tip and is diffused, thereby impeding convergence.

The relational expression may be replaced with l / L = θ / 360 ° × 10 × Y, and Y is in the range of 0.25 to 0.7, preferably 0.25 to 0.5, so l / L is 10θ / 360 ° × 25. % To 10θ / 360 ° × 70%, more preferably equal to the range of 10θ / 360 ° × 50%.

Therefore, according to another invention of the present application, the taper angle θ of the orifice member is formed at 15 ° to 35 °, and the protruding length l of the tip of the needle is θ / 360 ° × 10L × 0.25 to θ / 360 ° By constructing the nozzle body so as to be in the range of 10 x 10 L, the loom speed is 1000 rpm, as well as the excellent flow velocity of the jet stream required for ultra-high speed operation of 1200 rpm or more, and the jet stream without diffusion of water droplets, and high speed and weft. It is possible to exhibit the functionality such as the generation of the injection water flow having a strong conveyance force and the amount of water consumed per 1 rpm of the loom.

On the other hand, the example which calculates the value of the protrusion length l of the tip of a needle specifically about one component in the water spray nozzle of this invention is as follows. First, when the taper angle α of the needle is 5 °, the outer diameter of the tip of the needle is 1.4 mm, the diameter of the outlet corner of the orifice member is 2.1 mm, and the taper angle θ is formed at 30 °, the dimension L ) Is 1.4 mm. In addition, when the value of Y is set to 0.5, for example, l = 30 ° / 360 ° × 10 × 1.4 × 0.5 = 0.58 mm.

(Example 1)

Needle diameter of the needle is 2.0mm, orifice outlet corner diameter of 2.7mm and 2.8mm, using the water jet nozzle provided with the partition wall of the present invention, 150 denier / 48 filament, weaving speed of 2240 twist / m weft As a result of weft loading under the condition of 700 rpm and Ossalock 70 mm, the slip between the jet stream and the weft yarn was 10 ° faster at a cam rotation angle than the conventional weft feeding nozzle. This indicates that the jet water flow has good continuity and the end of weft loading is fast, and the jet water flow in the weft arrival detection sensor unit (position of 1900 mm) is very clean and stable without scattering of water droplets scattered and scattered. Return of weft was achieved.

(Example 2)

The convergence of the jet water flow by the weft-filling nozzle shown in FIG. 1 of this invention and the conventional water spray nozzle which has the nozzle main body of FIG. 10 was compared with the following experiment.

First, the operating speed of the loom was 1000 rpm, the cylinder inner diameter was 12.5 mm, and the pressure water generated in the plunger pump having a stroke of 11 mm was supplied to the water spray nozzle.

The degree of convergence was set by placing a gypsum board having a thickness of 15 mm on the opposite side of the nozzle 2 m away from the water spray nozzle and operating the loom for 1 minute, whereby the gypsum board was eroded by the jet flow as shown in FIG. As a result of evaluating the sizes of Y and Z, the following results were obtained.

(1) Conventional weft nozzle: X = 55mm, Y = 45mm, Z = 20mm

(2) Wefting nozzle of the present invention: X = 25mm, Y = 22.5mm, Z = 10mm

The above test results show that, according to the water spray nozzle of the present invention, the diameter at the distal end of the jet stream is converged to 1/2 of the conventional nozzle, and the conveyance force of the weft yarn is strong because the convergence property is high and the density is high. To indicate that.

(Example 3)

As shown in Fig. 7, the result of the weft test by assembling the needle whose diameter was smaller than the outer diameter formed by the needle taper angle θ in the conventional nozzle body was shown as follows. . At first, adhesion scale of scale and monomer became very small. In addition, even when a slight amount of scale or adhesion deposition of monomers occurred due to long-term weft insertion, the diameter of the tip of the needle was reduced, so that the jetting water flow did not occur at all. Further, since the diameter of the tip of the needle is reduced, the ejected jet stream exhibits the effect of strongly converging in the diameter reduction portion of the needle tip, and a favorable jet stream of extremely excellent convergence is obtained.

On the other hand, a needle having a diameter of the needle tip of the present invention reduced in diameter is excellent even when it is attached to a nozzle body of Japanese Patent Application Laid-Open No. 62-88779 or a conventional nozzle body fitted with a known ballast. Good jet flow can be generated.

Moreover, when the needle which reduced the diameter of the front-end | tip part of this invention was attached to the nozzle main body which provided the partition between the water injection hole and the water injection hole, the jet stream which shows marvelous convergence property is obtained. Here, as the shape of reducing the diameter of the needle tip portion, as shown in FIG. 7, the taper has a diameter of which the outer diameter of the reduced portion is a straight line of the same dimension over the entire length, and the outer diameter of the reduced diameter portion has a narrow tip shape. Type or a sharp angle type which is continuous at an angle larger than the taper angle θ without reducing the diameter in the stepped shape.

Fig. 8 is a longitudinal sectional view of the wefting nozzle in which the stabilizer 8 is arranged in two stages in the wefting nozzle of the present invention. The same reference numerals are given to the same members as in Fig. 1, and the description thereof is omitted.

In FIG. 8, the partition 10 between the water injection hole 2 and the water injection hole 2 is also written together for convenience, and the ballast 8c is attached to the part of the stabilizer 8 of the conventional nozzle main body 1 shown in FIG. By arranging and installing 8d) in multiple stages, it is possible to generate favorable jet streams with much higher convergence than conventional water jet nozzles.

On the other hand, the partitions arranged on both sides of the water injection hole may be arranged separately from the conventional ballast, or may be arranged integrally with the two. Moreover, you may fit the member which formed the partition in the cylindrical inner diameter inside the nozzle main body.

(Example 4)

Loom operating conditions,

* Loom speed = 1100 rpm,

* Plunger Pump: Cylinder Inner Diameter = 12mm, Piston Stroke = 12mm

* Water spray nozzle dimension

Needle: needle taper angle α = 5 °, outer diameter of needle tip = 1.4mm

Diameter of orifice outlet corner = 2.1 mm

* Type of nozzle comparing the degree of convergence of the jet stream in the embodiment

Conventional product: Nozzle disclosed in Japanese Patent Application Laid-open No. Hei 4-18053

Class A of this invention: The taper angle (theta) of the orifice member 7 of the conventional

15 ° to 25 °

Class B of the present invention: l = θ / 360 ° × 10L × 0.317 = 0.5mm,

l = θ / 360 ° × 10L × 0.634 = 1.0mm

C class of the present invention: water injection such as Japanese Patent Application Laid-Open No. 10-287798

Of the nozzle having an axial partition wall formed between the hole and the water injection hole.

The taper angle θ of the orifice member 7 is 25 °, and

l = θ / 360 ° × 10L × 0.317 = 0.5mm,

By installing the gypsum board having a thickness of 15 mm on the opposite side of the nozzle 2 m away from the water spray nozzle and operating the loom for 1 minute, the gypsum board was eroded by the jet flow as shown in FIG. It evaluated by the magnitude of Y and Z.

On the other hand, in Fig. 14, X is a diameter where the gypsum board is slightly eroded by the water droplets blown out by the jet stream, Y is a diameter where the gypsum board is eroded to a depth of 0.5 mm by the jet stream, and Z is a gypsum by the jet stream. The diameter of the through hole where the board has eroded to the back.

In addition, Table 1 shows the degree of convergence of the jet stream according to the present embodiment. As can be clearly seen from Table 1, the conventional products show that the value of X is very large and the amount of water droplets that are blown out is large, and the value of Y and the small value of Z are poor in the flow rate of the jet stream and the injection. The flow velocity of the water stream is low and the power of water is weak.

Next, in class A corresponding to claim 4 of the present invention, in all nozzles in which the taper angle θ of the orifice member is changed to 15 ° to 35 °, the diffusion range of scattered water droplets is small, so that the X value and Y Since the value is considerably small, the convergence is good and the water force is strong, the Z value is larger than that of conventional products.

Composition of Water Spray Nozzle Range eroded by jet stream (diameter) Type of nozzle l X Y Z Conventional 1.5mm 45 mm 37 mm 15 mm Class A (θ = 15 °) 1.5mm 35 mm 31 mm 20 mm Class A (θ = 20 °) 1.5mm 33 mm 31 mm 21 mm Class A (θ = 25 °) 1.5mm 33 mm 31 mm 21 mm Class A (θ = 30 °) 1.5mm 35 mm 32 mm 19 mm Class A (θ = 35 °) 1.5mm 36 mm 32 mm 19 mm Class B (θ = 25 °) 0.5mm 30 mm 28 mm 22 mm Class B (θ = 25 °) 1.0mm 31 mm 28 mm 21 mm Class C (θ = 25 °) 0.5mm 28 mm 26 mm 24 mm

Next, Class B and Class C corresponding to Claims 5 and 6 of the present invention have very few water droplets spreading from the X value and the Y value smaller than the A type, and the Z value is Y value. The approximation shows that the flow rate of the jet stream is very good, the flow velocity of the jet stream is fast and the force of water is strong.

The water spray nozzle of this invention can exhibit the following performance effects.

(1) According to the present invention, by providing a partition between the water injection hole and the water injection hole, the phenomenon of collision with each other at the needle outer peripheral part is eliminated, and since it is brought into a rectified state before entering the ballast, Since the pressure loss becomes small, a high speed and high speed jet stream is obtained. As a result, the interference of the warp due to the scattering of the jet stream can be almost eliminated, and the conveying force of the weft can be obtained strongly, thereby achieving stable weft loading.

(2) A high speed jetting stream with excellent convergence performance can be achieved by fitting a needle having a reduced diameter of the tip of the present invention to a nozzle body provided with a partition between a conventional nozzle body or a water injection hole and a water injection hole of the present invention. Is obtained, the interference of the warp is almost eliminated, the high speed operation of the loom becomes possible, and the repair work for removing the deposit accumulated at the tip of the needle can be greatly reduced.

(3) By installing at least two ballasts of the present invention in a plurality of stages, a good jet flow of excellent convergence is obtained even though the nozzle body has almost the same shape as a conventional product, and there is little interference of warp yarns. Stable wefting can be achieved. Further, by combining the first, second and third inventions in the present invention, it is possible to provide a synergistic effect and provide an ideal weft feeding nozzle.

(4) Since the amount of air sucked from the needle hole of the needle can be reduced to the minimum necessary, the amount of air mixing into the jet stream is reduced, the droplets of jet stream are small, and the jet stream can be discharged with excellent convergence. have.

(5) Since there are few droplets of spray water, there are no hairs on the warp or cause damage.

(6) Since the jet stream of the high speed and the strong conveyance force of the weft can be discharged, it is possible to carry out the weft stable for a long time at a loom speed of 1200 rpm or more, which could not be achieved by the conventional water spray nozzle.

(7) Since a jet stream having excellent convergence is obtained, weft loading can be achieved with relatively low water consumption, so it is economical.

(8) Even under the conditions of the same loom speed, the conveying force of the weft due to the jet flow is strong, so that the pressure of the pump generating the pressure water can be made smaller than that of the conventional water spray nozzle, thereby contributing to energy saving.

(9) Whenever the dimensions of the needle and the orifice member were changed, it was necessary to determine the protruding length of the needle tip conventionally by a number of weft loading tests, but it protruded by the formula of l = θ / 360 ° × 10L × Y of the present invention. The length l can be obtained simply by calculation.

(10) Moreover, by combining each of the first to fifth inventions in the present invention, a synergistic effect can be exerted to provide an ideal water spray nozzle.

Claims (7)

A plurality of water injection holes are provided in the edge wall of the nozzle body, and the weft introduction needle is coaxially mounted inside the nozzle body, an orifice member is disposed around the head of the tip of the needle, and an upstream side of the orifice member. A weft nozzle having a rectifier ballast in the water jet nozzle, wherein a partition wall is provided in the axial direction between the water injection hole and the water injection hole. A plurality of water injection holes are provided in the edge wall of the nozzle body, and the weft introduction needle is coaxially mounted inside the nozzle body, an orifice member is disposed around the head of the tip of the needle, and an upstream side of the orifice member. A weft nozzle having a rectifier ballast in the water jet nozzle, wherein the outer diameter of the needle tip is reduced in diameter from a dimension formed by a needle taper angle. A plurality of water injection holes are provided in the edge wall of the nozzle body, and the weft introduction needle is coaxially disposed inside the nozzle body, an orifice member is disposed around the head of the tip of the needle, and an upstream side of the orifice member. A weft nozzle having a rectifier ballast in the water jet nozzle, wherein at least two ballasts are arranged so as to be arranged in plural stages. The method according to claim 2 or 3, A water spray nozzle comprising a partition wall provided in an axial direction between a water injection hole and a water injection hole. The weft introduction needle is coaxially disposed inside the nozzle body, an orifice member is disposed around the head of the tip of the needle, and a water spray nozzle having at least one rectifier ballast upstream of the orifice member. The water spray nozzle according to claim 1, wherein the taper angle θ of the flow path toward the downstream side of the orifice member is formed at 15 ° to 35 °. The method of claim 1, Of the length (l) from the exit corner portion where the downstream flow path of the orifice member and the downstream end face intersect and the extension line of the taper angle (θ) of the flow path of the orifice member and the taper angle α of the needle tip The relation between the length dimension L from the point where the extension line intersects and the outlet corner is l = θ / 360 ° × 10L × Y, and the value of Y is in the range of 0.25 to 0.7. . A plurality of water injection holes are provided in the edge wall of the nozzle body, and the weft introduction needle is coaxially disposed inside the nozzle body, an orifice member is disposed around the head of the tip of the needle, and an upstream side of the orifice member. In the water spray nozzle provided with the ballast for rectification, the partition wall is provided in the axial direction between the water injection hole and the water injection hole, and the taper angle θ of the flow path toward the downstream side of the orifice member is 15 ° to 35 °. The water spray nozzle, characterized in that formed.