JP2016132853A - Water jet nozzle using high-speed air stream together - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a water jet nozzle for inserting the weft which has excellent convergence property of a jet water flow, is adaptable to super wide woven fabric, and is an energy-saving and water-saving type.SOLUTION: Pressurized air generated by a water jet pump is supplied from an air introduction hole of an air jet flow member, and then jetted out from a slit part of the air jet flow member to an outer peripheral base end part of an orifice member so as to jet out a high-speed air flow at the same time with a jet water flow.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a water jet nozzle in a water jet loom, in particular, a jet water flow excellent in convergence is obtained, suppresses the fluff of warp yarn due to jet water flow diffusion, exhibits excellent performance in a wide weave, The present invention relates to a water-saving water jet nozzle that uses less water.

  The water jet loom of an automatic loom has a water jet nozzle for transferring the weft yarn in the needle by the jet water flow to perform weft insertion by converting the pressure water supplied from the pump into a jet water flow and discharging it. I have.

  This water jet nozzle has a stabilizer for rectifying the pressure water supplied from the pump in the nozzle body, and a flow path of the pressure water between the outer peripheral portion of the needle and the inner tapered portion of the orifice member on the downstream side of the stabilizer. The pressure water is converted into a jet water flow after being narrowed and discharged, whereby the weft yarn in the needle is vacuum sucked and conveyed by the jet water flow.

  Moreover, the performance of the water jet nozzle is that the pressure water supplied from the pump can be rectified to obtain a jet water stream that is as convergent as possible, and can stably weft various types of multipurpose wefts. Is required.

  In order to improve the performance of the water jet nozzle, in the stabilizer for rectification provided upstream of the orifice, a blade having a plurality of slits formed radially as flow paths is provided over the entire length in the axial direction, and the downstream end surface of the blade There is a structure in which a cavity is formed between a back edge and an orifice forming a cavities to prevent cavitation generated in the vicinity of the back edge, thereby enabling stable discharge of a jet water flow. (For example, see Patent Document 1)

  Further, by forming the taper angle θ of the orifice member to 15 ° to 35 °, a jet water flow suitable for ultra-high speed operation of 1200 rpm or more is generated, and from the outlet corner portion of the orifice member to the tip of the needle. There is a water jet nozzle in which the length I can be obtained by an equation of I = θ / 360 ° × 10 L × Y. (For example, see Patent Document 2)

JP-A-8-296151 JP2001-40551

  The water jet nozzle is not only the above-mentioned patent document, but various improvements have been made so far, but a jet water flow with good convergence can be obtained, and a high speed loom speed of 1000 rpm or more can be achieved. It does not reach a performance level that satisfies all of the performance such as having a water-saving feature with less diffusion splashes and less water consumption. In recent years, airbag fabrics, which are parts for automobiles, have a weaving width exceeding 230 cm, and wefts are as thick as 420 deniers, so weft insertion accuracy is strongly required.

  In the present invention, a weft insertion needle is coaxially arranged inside a nozzle body, an orifice member is arranged around the head near the tip of the needle, and a rectifying stabilizer is provided upstream of the orifice. In the jet nozzle, a high-speed jet water stream and a high-speed air stream are simultaneously ejected by blowing a high-speed air current around the orifice from an air flow path of a jet air flow member assembled in front of the nozzle body. Use a water jet nozzle.

  In the present invention, the outer peripheral surface of the spring guide provided on the water jet pump and the inner surface of the spring strength adjusting screw member are used as a secret structure, and an air compression chamber is provided in the pump body to synchronize with the insertion and removal of the piston for jet water flow. Then, the compressed air is supplied to the air introduction hole of the jet member through the pipe from the pressure air discharge port.

  According to the present invention, a high-speed air flow generated from a water jet pump is supplied to an air introduction hole provided in at least one location of the jet member, and then the orifice outer periphery is formed from a plurality of slits formed in the inner end face of the jet member. The water jet nozzle according to claim 1, wherein the water jet nozzle is configured to be ejected to a portion.

  The present invention provides the water jet nozzle according to any one of claims 1 to 3, wherein the jet water stream is caused to fly through a central portion of the high-speed air stream ejected from the jet stream member.

  In the present invention, a weft insertion needle is coaxially arranged inside a nozzle body, an orifice member is arranged around the head near the tip of the needle, and a rectifying stabilizer is provided upstream of the orifice. In the jet nozzle, the vacuum suction air is discharged simultaneously with the jet water flow by supplying the vacuum sucked air toward the orifice outer diameter side taper portion through the air flow path of the jet air flow member assembled in front of the nozzle body. It is set as the water jet nozzle characterized by this.

  The water jet nozzle according to the present invention exhibits the following excellent effects.

  1. By blowing a high-speed air flow from the taper base end on the outer diameter side of the orifice, the stagnant water in the slow jet water flow before the pump pressure reaches the maximum at the orifice outlet end surface is converted into a high-speed air flow. Since the shape of the instantaneous jet water flow tip is small and maintained for a long time, an efficient high-speed jet water flow with few scattering splashes can be obtained.

  2. The jet air flow around the jet water flow is faster than the jet water flow, and in the straight part of the jet air flow member, it becomes pressurized and exerts the effect of enhancing the convergence of the jet water. In addition, the water-saving effect of the amount of jet water can be greatly achieved by increasing the speed of the efficient jet water flow.

  3. By blowing high-speed airflow from the orifice outer diameter side taper base end, the vacuum phenomenon associated with jet water injection does not occur at the orifice outlet end face, and the effect of greatly reducing the discharge resistance of jet water can be obtained. A jet water stream with little diffusion splash is obtained.

  4). By blowing a high-speed air flow from the taper base end portion on the outer diameter side of the orifice, an effect of greatly relieving the air resistance associated with the high-speed straight traveling of the jet water flow can be obtained, so that a jet water flow with less diffusion splashes can be obtained.

  5. The jet water flow flies through the center of the high-speed air flow, so the diffusion phenomenon of the jet water flow is remarkably suppressed, and the high-speed operation rate of the water jet loom is greatly improved as a result of the speed-up of the jet water flow being facilitated. .

  6). Due to the effects 1, 2, 3, 4 and 5 of the above-described invention, a jet water flow excellent in convergence can be obtained.

  7). Since the jet water flow has good convergence, ultra-wide fabrics (230 cm or more) can be woven stably, and the jet water flow has excellent convergence, so that warp yarns (fluff) caused by high-speed diffusion water can be generated. Does not occur.

It is a longitudinal cross-sectional view of the water jet nozzle of this invention. It is a longitudinal cross-sectional view of the vicinity of the needle tip of the water jet nozzle of the present invention and the vicinity of the outlet end face of the orifice member. It is a longitudinal cross-sectional view of the water jet pump provided with the air compression function. It is a three-dimensional schematic diagram of a water jet pump having an air compression function. (A) It is a longitudinal cross-sectional view of the jet member of this invention. (B) It is a front view of Fig.5 (a). (A) It is a longitudinal cross-sectional view of the jet stream member of another aspect of this invention. (B) It is a front view of Fig.6 (a). It is a longitudinal cross-sectional view of the conventional water jet nozzle. It is a longitudinal cross-sectional view of an air inflow valve member.

  Embodiments of the present invention will be described below with reference to the drawings.

  In the water jet nozzle of the present invention shown in FIG. 1, a jet air flow member 14 is coaxially arranged in a nozzle body 1, a weft introduction needle 3 is coaxially arranged inside the nozzle body 1, and the vicinity of the needle tip of the needle 3. The orifice member 6 is coaxially disposed around the same, and the stabilizer 5 for rectifying the supply water is disposed coaxially on the upstream side of the orifice member 6. In this water jet nozzle, the pressure water supplied from the water injection hole 9 is rectified by the stabilizer 5, and then the flow path of the pressure water is narrowed between the tapered portion near the needle tip 4 and the tapered portion of the orifice member 6. As the water flow speeds up, it is jetted as a jet water flow from between the needle tip 4 and the outlet of the orifice member 6. Further, in the air compression chamber 25 of the water jet pump main body 19 of FIG. 3, the air compressed by the repulsive force of the spring 24 is arranged at the pressure air exhaust port 28 of FIG. To the air introduction hole 15 of the jet member 14 through a pipe (not shown), through the slit 30 of the jet member 14, the outer diameter side taper base end of the orifice member 14 and the inner diameter side of the jet member 14. From the jet stream.

  The weft thread in the needle 3 is sucked into the jet stream because the thread hole 11 is in a vacuum state by the jet stream, and is inserted into the jet stream.

  As shown in FIGS. 5 (a) and 5 (b), the jet member 14 disposed in the water jet nozzle of the present invention has a ring-shaped space slit on the entire inner diameter side of the mounting screw inner diameter side of the jet member 14. 29, and a plurality of radial slits 30 are provided on the end surface portion of the thick portion formed by the ring-shaped space slit 29 and the inner diameter side straight portion 18 of the jet air flow member. As shown in FIG. 2, the fountain member 14 has a discharge resistance due to a vacuum phenomenon (fluid resistance) generated at the tip end portion and the outer diameter cavity portion of the orifice member 6 along with the normal jet water flow, as shown in FIG. By releasing the air supplied from 15 through the slit from the outer diameter side taper base end portion of the orifice member 6 at a high speed, the effect of relieving significantly is exhibited.

  In addition, by jetting a high-speed air flow from the outer diameter side taper base end portion of the orifice member 6, the effect of greatly relieving the collision between the jet water flow and the air is exhibited.

  Further, by jetting a high-speed air flow from the outer diameter side taper base end portion of the orifice member 6, the effect of blowing off the water that tends to stay on the orifice outlet end surface every jet water injection is exhibited.

  6 (a) and 6 (b) show a jet member 31 according to another embodiment of the present invention, which is a system that does not use the pressure air of a water jet pump. The jet member 31 is provided with air inflow holes 32 at a plurality of positions on the outer peripheral surface, and the air inflow holes 32 are penetrated to the ring-shaped space slit 29 of the jet member 31. Furthermore, in ordinary water jet nozzles, the outer diameter side exit cavity of the orifice member mitigates the vacuum phenomenon that occurs as the jet water is released by sucking air from the jet air member 31, so that adhering stagnant water is generated. A jet water stream with good convergence can be obtained.

  FIG. 8 shows an air inlet valve member 33 disposed at the pressure air discharge port 28 of the water jet pump. The air inflow valve member 33 opens the air inflow valve 34 of the air inflow valve member 33 due to air suction during the air suction stroke of the air compression chamber 25 of the water jet pump, and air is sucked from the air suction hole 35 to compress the air. Air is supplied to the chamber 25. Further, the air inflow valve 34 is closed at the time of air compression and discharge so that air is not discharged from the air suction hole 35.

  In this embodiment, the outer diameter surface of the spring guide 23 of the pump and the inner diameter surface of the spring strength adjusting screw member 22 are kept confidential, an air compression chamber 25 is formed, and the pump has an air compression function generated by the repulsive force of the spring 24. I gave it. The outer diameter of the spring guide 23 is 78 mm, the piston 21 diameter is 22 mm, the stroke is 15 mm, the rotational speed is 1000 rpm, and the weft yarn at a weaving width of 230 cm is 420 denier. The efficiency of the loom utilization rate has also increased significantly. In order to analyze the technology leading to that, in the conventional water jet nozzle, the jet water ejected from the nozzle is a jet water flow exceeding 100 m / s, and the jet water flow collides with air at the moment when it is ejected from the nozzle, The cross-sectional area of the jet water was about to expand at a stretch. This time, by flowing high speed air from the outer circumference of the orifice by about 70cc in every 0.02 seconds per weft rotation, the situation of the 6cc jet water flow jetted at the same time is drastically improved and the weaving width exceeds 230cm. By the way, compared with the conventional water jet nozzle, it has been proved that the diffusing diameter of jet water is 50% smaller and the weaving function is stable, so that the woven quality is good and the operation rate is greatly improved.

DESCRIPTION OF SYMBOLS 1 Nozzle body 2 Body 3 Needle 4 Needle tip 5 Stabilizer 6 Orifice member 7 Orifice inner surface taper 8 Outlet end surface of orifice member (orifice outlet end surface)
9 Water injection hole 10 O-ring 11 Thread hole 12 Needle screw 13 Thread guide 14 Jet air flow member 15 Air introduction hole 16 Jet water flow 17 High-speed air flow 18 Jet air flow member straight portion 19 Water jet pump body 20 Cylinder 21 Piston 22 Spring strength adjustment screw Member 23 Spring guide 24 Spring 25 Air compression chamber 26 Outlet 27 Inlet 28 Pressure air outlet 29 Ring-shaped space slit 30 Radial slit 31 Jet air flow member 32 of another aspect Air inflow hole 33 Air inflow valve member 34 Air inflow valve 35 Air suction Hole

Claims (5)

  A water jet nozzle having a weft insertion needle coaxially arranged inside the nozzle body, an orifice member arranged around the head near the tip of the needle, and a rectifying stabilizer upstream of the orifice. A water jet nozzle that simultaneously jets a high-speed jet water stream and a high-speed air stream by blowing a high-speed air stream around the orifice from an air flow path of a jet air flow member assembled in front of the nozzle body.   The outer peripheral surface of the spring guide provided on the water jet pump and the inner surface of the spring strength adjusting screw member are used as a secret structure, and an air compression chamber is provided in the pump body, which is compressed in synchronism with the insertion and removal of the piston for jet water flow. 2. The water jet nozzle according to claim 1, wherein the air is supplied from a pressure air discharge port to an air introduction hole of the jet member through a pipe.   A high-speed air flow generated from a water jet pump is supplied to an air introduction hole provided in at least one location of the jet member, and then ejected from the plurality of slits formed in the inner end face of the jet member to the outer periphery of the orifice. The water jet nozzle according to claim 1, wherein the water jet nozzle is configured as described above.   4. The water jet nozzle according to claim 1, wherein a jet water stream jetted at the same time flies through a central portion of a high-speed air stream jetted from a jet stream member.   A water jet nozzle having a weft insertion needle coaxially arranged inside the nozzle body, an orifice member arranged around the head near the tip of the needle, and a rectifying stabilizer upstream of the orifice. The vacuum suction air is discharged simultaneously with the jet water flow by supplying the vacuum sucked air toward the orifice outer diameter side taper portion through the air flow path of the jet member assembled in front of the nozzle body. Water jet nozzle to be used.

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