TW536566B - Weft insertion nozzle of fluid jet type loom - Google Patents

Abstract

A weft insertion nozzle capable of increasing the directivity of the jet fluid jetting thereout so as to prevent the jet fluid from divergence and capable of enabling the loom to do high-speed weft insertion is provided. The weft insertion nozzle includes an inside member having a through hole which the weft can pass insert through and an outside member with the inside member inserted therein. The outside member has an inner circumferential surface which is coaxial with the outer circumferential surface of the inside member. Between the inner circumferential surface of the outside member and the outer circumferential surface of the inside member, an annular first fluid path and a second fluid path continuing at the downstream side of the first fluid path are formed. The second fluid path has a jet orifice for the pressured fluid at its downstream end. At least one side of the inside or outside of the section corresponding to at least the position of the jet orifice of the second fluid path, is formed to be a non-circular shape. The non-circular shape is formed by arranging a plurality of unit shapes around the axis of the two circumferential surface at an equal angular interval.

Description

536566 V. Description of the invention α) [Technical field to which the invention belongs] The present invention relates to a weft injection nozzle used in a fluid jet loom such as a water jet loom. [Known technology] As one of the weft injection nozzles, a needle having a through hole that can penetrate the weft thread is inserted into the nozzle body coaxially to form an annular flow path between the two. The commutators of the plurality of rectifying walls (around the axis at equal angular intervals) are arranged on the front (downstream) side of the annular flow path at a distance from the periphery of the front end of the needle. The nozzle body guides a high-pressure fluid to a plurality of introduction holes of an annular flow path. (Patent No. 3 1 2 0 042). In this conventional technique, the "southern pressure fluid" is introduced into the annular flow path from the nozzle holder connected to the source of the south pressure fluid through the introduction hole, and in the annular flow path, from the injection port toward the jet through the gap between the needle and the commutator. The warp threads spray out. The commutator has a plurality of rectifying walls on the upstream side, and the gap between adjacent rectifying walls becomes a rectifying groove. In addition, the commutator has an inner peripheral surface with a circular cross section on the downstream side, and the inner peripheral surface and the outer peripheral surface of the front end of the needle are formed at the downstream end. Jet port. The inner peripheral surface on the downstream side of the commutator and the outer peripheral surface of the needle are facing downstream at the same time, the diameter gradually decreases, and the cross-sectional area of the flow path gradually decreases, so that the high-pressure fluid shrinks and accelerates. When it reaches the ejection port, it is liberated from contraction. It is released from the pressurized state and becomes a jet fluid. The high-pressure fluid is divided into a plurality of branch streams by a rectifying wall to prevent these branch streams from colliding with each other and rectify them. [Problems to be Solved by the Invention]

313565.ptd Page 6 536566 V. Description of the invention (2) However, in the conventional weft injection nozzle, the shape of the inner peripheral surface and the outer peripheral surface forming the fluid ejection port is circular, and the high-pressure fluid has a uniform and uniform velocity. As a result, the ejection fluid ejected from the ejection port is easily diffused, which damages the warp threads and reduces the flying speed of the weft threads, making the textile machine unable to operate at high speed. The object of the present invention is to improve the directivity of the ejection fluid, prevent the ejection fluid from scattering and deteriorating the convergence, and can insert weft at high speed. [Means for solving the problem] The weft-feeding nozzle of the present invention includes an inner member having a through hole through which weft threads can pass, and an outer member inserted with the inner member, and the outer member has an inner peripheral surface coaxial with an outer peripheral surface of the inner member. The inner peripheral surface and the outer peripheral surface together form a ring-shaped first flow path and a second flow path connected to the downstream side of the first flow path and having a flow path cross-sectional area that decreases toward the downstream side. The downstream end of the second flow path has an injection port through which a high-pressure fluid is ejected. At least one of the inside and outside of the cross section of the second flow path corresponding to at least the position of the ejection port is formed into a non-circular shape in which a plurality of unit shapes are arranged at equal angular intervals around the axis of the two peripheral surfaces. The south pressure fluid introduced into the annular first flow path ^ shrinks and accelerates in the second flow path, where the cross-sectional area of the flow path decreases toward the downstream side, and is released from the contraction caused by the second flow path in the ejection port and is released from The pressurized state is released, and the ejection fluid is ejected from the ejection port. Non-circular shaped ejection ports having a plurality of unit shapes arranged at equal angular intervals around the axis of the two peripheral surfaces are a plurality of spaces of the same shape with equal angular intervals in the circumferential direction. Part of the large space due to high pressure flow

313565.ptd Page 7 536566 V. Description of the invention (3) The flow path resistance of the body is small, so the jet system ejected from this part is ejected at high speed. Therefore, the ejection fluid is arranged at a plurality of high-speed portions at equal angular intervals in the circumferential direction, and is ejected in such a state that the high-speed portions form a ring bundle. Therefore, compared with the conventional technique in which high-pressure fluid is ejected annularly at an average and uniform velocity, the directivity of the ejected fluid becomes higher, and the convergence of the ejected fluid is also improved. Therefore, according to the present invention, it is possible to suppress warp damage caused by the diffusion of the ejection fluid, and also to insert the weft at a high speed. At least one of the inner member and the outer member may have a plurality of rectifying walls formed at an equal angular interval with respect to the axes of the two peripheral surfaces, upstream of the ejection port. Due to the high-pressure fluid contracting and accelerating, the high-speed fluid flows conflict with each other and become a turbulent state. Once the rectifying wall exists, the turbulent wall suppresses the high-speed fluid flow conflict and suppresses the turbulent state. As a result, the convergence of the ejected fluid More improved. In a preferred embodiment, the outer member includes: the nozzle body coaxially inserted with the inner member; and an annular member disposed in the nozzle body and forming the second flow path together with the inner member. In another preferred embodiment, the rectification wall reaches at least the injection port. [Embodiment of the invention] Referring to FIG. 1 and FIG. 2, the weft insertion nozzle 10 includes a needle 12 as an inner member, and a cylindrical nozzle body 14 that stores the needle in a coaxial manner. Rectification of the ring-shaped member arranged in the nozzle body 14

313565.ptd Page 8 536566 V. Description of Invention (4) Sub16. The weft insertion nozzle 10 is attached to the nozzle body 14 to the nozzle joint 18. The needle 12 has a through hole 22 through which the weft thread 20 can pass, and is fixed to the nozzle body 14 by a stopper 24 which is screwed with the nozzle body 14 from the anti-fluid discharge side. The outer peripheral surface of the front end of the needle 12 has a smaller diameter as it goes toward the front end. The upstream side and the inner peripheral surface of the nozzle body 14 form a first flow path 26 in a ring shape. The nozzle body 14 is attached to the nozzle joint 18 in a state where the nozzle body 18 passes through the nut 28, which is screwed from the fluid discharge side. The nozzle body 14 has an annular groove 32 communicating with the fluid flow path 30 of the nozzle joint 18 on the outer peripheral surface, and a plurality of introduction holes 34 communicating with the annular groove 32 and the first flow path 26. The axes are spaced at equal angles around each other. The commutator 16 is arranged at the downstream end of the first flow path 26 and has a plurality of fins extending in the axial direction around the axial direction of the nozzle 10 at equal angular intervals around the axial direction of the commutator 16 ( fin), that is, the rectification wall 36. A rectifying groove 38 is formed between the adjacent rectifying walls 36 in the circumferential direction (refer to FIG. 2). The inner peripheral surface 40 of the commutator 16 and the outer peripheral surface 44 of the front end portion of the needle 12 together form a second flow path 4 2 whose flow path cross-sectional area decreases toward the downstream side. The peripheral surface is coaxial. The second flow path 42 has, at the downstream end, an injection port 46 which releases the high-pressure fluid from the contracted state in the second flow path 42 and releases the pressurized fluid from the pressurized state. Each rectifying wall 36 is formed so as to cover the entire length of the second flow path 42 in the axial direction. Therefore, the downstream end surface of the commutator 16 corresponding to the injection port 46 is formed so that a plurality of unit shapes are arranged at equal angular intervals around the axis.

536566 Fifth, the non-circular shape formed by the description of the invention (5). The tip of the needle 12 protrudes from the injection port 46 to the downstream side. In the example shown in the figure, each unit shape, such as the rectifying wall 36 and the adjacent rectifying groove 38, is a continuous uneven shape, and the non-circular end surface shape is the same uneven shape as above, at an equal angle. The interval method is formed by continuously arranging in the circumferential direction. In the example shown in the figure, 10 rectifying grooves 36 of the same shape are used to arrange 10 rectifying grooves 38 of the same shape around the axis at equal angular intervals. One or more o-rings 48 are arranged between the needle 12 and the nozzle body 14, and between the nozzle body 14 and the nozzle joint 18. In the weft insertion device 10, the needle 12 functions as an inner member, and the nozzle body 14 and the commutator 16 function as an outer member. The pressure flow system is guided from a high-pressure fluid source to the annular groove 32 of the nozzle body 14 through the fluid flow path 30 of the nozzle joint 18, and is introduced into the annular groove 32 from the annular groove 32 through a plurality of introduction holes 34. The first flow path 26 is introduced into the second flow path 42 from the first flow path 26. The high-pressure fluid introduced into the second flow path 42 shrinks and accelerates in the second flow path 42 as the cross-sectional area of the flow path decreases toward the downstream side, and shrinks from the second flow path 42 at the injection port 46. It is released from the pressurized state in the middle, becomes a jet fluid, and is ejected from the ejection port 46. The inner peripheral surface of the injection port 46 has a non-circular shape formed by arranging a plurality of unit shapes in the circumferential direction at equal angular intervals. Therefore, the inner peripheral surface and the outer peripheral surface of the injection port 46 are attached to each other. The circumferential direction forms several spaces of the same shape at equal angular intervals. In such a space, the large part

313565.ptd Page 10 536566 V. Description of Invention (6)

The ejection fluid is ejected from this part due to the high-pressure fluid flow path P and A is ejected at high speed. Therefore, in a spaced manner, the state of the bundle of beams is convergently sprayed to improve the damage. At the same time, the rectifying wall is formed into a ring-shaped bundle by the rectifying element. 〇The diameter of the commutator is a type of weft-injection spray in the flow path 64 of a total of 64 'rings 56 in the outer peripheral surface of the closing part. It is arranged in a circumferential spray. Compared with conventional shots, it has a higher mouth and can be suppressed. It can also catch 36, and keep the state of the beams between 36 and 6 in the high wall to be sprayed as shown in Figure 3 and Figure 4, and the front end of the ring 58 and the inner peripheral surface of the valve 54 will act as a downstream valve. At the same time, the lower end of the flow path is formed to form a constricted solution nozzle 50, and the plurality of directions are directed toward a plurality of high directions, and the side of the anti-aircraft fluid in the & technology ejects the fluid latitude. The pressurized fluid is sprayed into the rectifying groove to the jet port 46, and the weft-injection nozzle 56 is arranged at the smaller part from the jet port 60 to the smaller of the ring 56, and the inner cross-sectional area of the ring 5 6 becomes smaller. It is placed toward the injection port 5 6 and is delayed from the sleeve line direction of the pressurized commutator 5 4. This high-pressure fluid has better flatness, and the diffusion becomes chaotic 38 and high-pressure flow 46 before firing. In order to maintain the limit 50 at this time, use the flowless 5 4 downstream 5 2 to the downstream inner peripheral surface 62 and the conical surface. Because the circumferential surface 6 2 is smaller and downstream, the rectifying wall extending in the circumferential direction after the high-pressure state is liberated has a uniform velocity and a uniform velocity at the same angular velocity and a meridian flow state of the projecting fluid. The state of the high-speed part of the body's high-speed part. The second flow projecting distance to the ejection port side is continuous with each other. Therefore, the front end of the ring 5 6 needle 5 8 is the second flow path, and the fluid is ejected from the second. At an equal angle of 70, adjacent

Page 11 536566 V. Description of the invention (7) Between the rectifying walls 70, there are rectifying grooves 72, and at the same time, the outer circumference of the front end of the needle 58 is a distance L2 from the front end to the upstream side, and is spaced at equal angles in the circumferential direction. A plurality of rectifying trenches 7 4 extending in the axial direction are formed, and a wall between adjacent rectifying trenches 74 is used as a rectifying wall 76. In the weft insertion nozzle 50, the position of the outer peripheral surface of the needle 58 corresponding to the ejection port 52 is a non-circular end surface shape in which unit shapes are arranged at equal phases in the circumferential direction. In the example shown in FIG. 4, each unit shape is, for example, a rectifying groove 74 and a rectifying wall 76 next to it. Generally, the end surface shape is a continuous concave-convex shape 'non-circular opening>, which is the same concave-convex shape as above. It is continuously arranged in the circumferential direction at equal angular intervals. In the example shown in the figure, 10 unit shapes formed by adjacent rectifying grooves and rectifying walls, respectively, are arranged around the axis at equal angular intervals. However, it can also be regarded as five unit shapes formed by two rectifying grooves and two rectifying walls, which are formed around the axis at equal angular intervals. In the weft insertion device 50, the needle 58 functions as an internal member, and the nozzle body 14, the commutator 54, and the ring 56 function as external members. In the Quanwei nozzle 50, the high-pressure fluid introduced into the second flow path 64 is contracted and accelerated in the second flow path 64 where the cross-sectional area of the flow path is reduced toward the downstream side, and is ejected from the second flow path at the injection port 52. The contracted state in the path 64 is released, and the ejection fluid is ejected from the ejection port 52. Therefore, the weft insertion nozzle 50 can achieve the same function or effect as the weft insertion nozzle 10. The ideal formation range of the rectifying groove 74 and the rectifying wall 76 is as shown in FIG. 3, from the injection port 52 to the front end of the protruding needle 58, but the rectifying groove 74 and the rectifying wall 76 are not formed at the front end of the needle 58. Round the tip of the needle 58

Page 12 536566 V. Description of the invention (8) The shape is also acceptable. At this time, the high-speed portion of the high-pressure fluid is guided by the outer peripheral surface of the front end of the needle 58 to maintain high speed. In particular, when the outer peripheral surface of the front end of the needle 5 8 is rounded, the diameter of the outer peripheral surface of the front end of the needle 5 8 is made smaller than the diameter of the rectifying groove. crjp 〇 Referring to FIG. 5 and FIG. 6, the weft insertion nozzle 80 uses the commutator 84 ′ that reaches the injection port 82 and makes the tip of the needle 86 recede from the downstream end of the commutator 84 to the upstream side. The position is set as the injection port 82, and the inner peripheral surface 88 of the commutator 84 becomes a truncated conical surface whose diameter becomes smaller toward the downstream side. The commutator 84 has a shape in which the commutator 54 and the ring 56 in Fig. 3 are integrated. The inner peripheral surface 88 of the commutator 84 and the outer peripheral surface 90 'of the distal end portion of the needle 86 have a common shape, and the second flow path 92 becomes smaller as the cross-sectional area decreases toward the downstream side. The ejection port 82 ejects the pressurized fluid from the contracted state in the second flow path 92. Adjacent to the throw angle, such as a distance-shaped cross-section, such as weft injection and rectification I, knife you Jinqian 8 4 the circumferential direction of the inner peripheral surface in a plurality of ways to form a plurality of rectifiers extending in the axial direction. Between the wall 94 and the rectifying wall 94, a rectifying groove 96 is formed. τΊ Figure-the outer peripheral surface of the front end of the needle 86, which is calculated from the front end, and the inside is formed into a regular triangle # r with the corners made at the top of the arc M and the unit shape is arranged in a uniform phase in the circumferential direction Non-circular opening, shape.箆 β ^ _ η ^ In the example shown in the figure, the shape of each unit is 连续 sn from,,, and adjacent surfaces, and has a continuous uneven shape. In the mouth 80, the needle helmet VII, V 〇4 g) I ... L functions as an inner member, and the nozzle body 84 functions as an outer member.

Page 13 536566 V. Description of the invention (9) In the weft injection nozzle 80, the high-pressure fluid introduced into the second flow path 92 is contracted and accelerated in the second flow path 92. After the contracted state is released, it becomes a jet fluid and is ejected from the jet port 82. In addition, the interval between the inner peripheral surface 88 of the commutator 8 4 and the outer peripheral surface 90 of the front end portion of the needle 86 is the smallest at the arc-shaped top 9 8, and the maximum Q is between the adjacent tops 9 8. The weft injection nozzle 80 can also achieve the same function or effect as the weft injection nozzles 10 and 50. Referring to FIG. 7 and FIG. 8, the weft insertion nozzle 100 uses a commutator 1 0 4 fitted to the nozzle body 14, and the tip of the needle 10 is projected from the downstream end of the commutator 1 104. In addition, the inner peripheral surface 108 of the commutator 104 is made into a truncated conical surface with a smaller diameter dimension toward the downstream side. The commutator 1 0 4 has a shape in which the commutator 5 4 and the ring 56 are integrated in the third figure. The inner peripheral surface 108 of the commutator 104 and the outer peripheral surface 110 of the front end portion of the needle 106 are formed together to form a second flow path 92 with a smaller cross-sectional area on the downstream side. The ejection port 10 2 releases the high-pressure fluid from the contracted state in the second flow path 112 and ejects the fluid. Weft insertion nozzles 100, and a plurality of rectifying walls 11 4 extending in the axial direction are formed at equal angular intervals in the circumferential direction of the commutator 1 104, and adjacent rectifying walls 11 4 become rectifying grooves 11 6. As shown in FIG. 8, the inner peripheral surface of the commutator 104 is formed into a pentagonal cross-sectional shape of the top portion 11 8 in a circular arc shape over the entire length, and becomes a unit shape in the circumferential direction. Non-circular shape with high phase arrangement. In the example shown in Fig. 8, each unit shape is, for example, a continuous concave-convex shape like an arc-shaped top portion 118 and its adjacent surface. Weft

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5. Description of the invention (10) In the nozzle 100, the needle 106 functions as an inner member, and the nozzle body 14 and the commutator 104 function as an outer member. The high-pressure fluid introduced into the second flow path 1 10 in the Butou nozzle 100 is contracted and accelerated in the second flow path 1 10, and is released from the contracted state in the injection port 102. The fluid is ejected and ejected from the ejection port 102. In addition, the interval between the inner peripheral surface of the commutator 104 and the outer peripheral surface π of the pinch surface 〇6 is tied to the arc-shaped top portion 118, and the adjacent top portion 1 is the smallest.丨 8 is the maximum. Therefore, the weft insertion nozzle 100 can also achieve the same function or effect as the weft insertion nozzles 100, 50, and 80. In the weft insertion nozzle 100, a commutator 1220 shown in FIG. 9 may be used. The inner peripheral surface 1 2 2 of the commutator 1 2 0 and the outer peripheral surface of the front end portion of the needle 106 are in common to form a second flow path 2 4 that has a smaller cross-sectional area toward the downstream. The ejection port 10 2 releases the still-pressure fluid from the contracted state in the second flow path 1 2 4 and ejects it. As shown in FIG. 9, the “inner peripheral surface 1 2 2 of the commutator 1 2 0” is formed in the “each unit shape” in the entire long example, for example, in a circular arc-shaped recess 1 2 6 and its adjacent range ”. The hexagonal cross-sectional shape of which the corners are circular arc-shaped recesses, and the central side between adjacent recesses expands into a non-circular shape in which unit shapes are arranged at equal phases in the circumferential direction. The surface-like shape shown in Fig. 9 is a continuous uneven shape. The outer peripheral surface of the commutator and the inner peripheral surface of the commutator may be in contact with the inner peripheral surface of the needle and the inner peripheral surface of the commutator. At this time, because the outer side of the needle has a non-circular cross-sectional shape, in the plurality of the above-mentioned embodiments, the needles are kept spaced in the half-rear direction, but the surface is at least less than the ejection port. The peripheral surface and the inner peripheral surface of the commutator can form a loop between them.

536566 V. Description of the invention (11) Space. The present invention is not limited to the above-mentioned embodiments, and various changes can be made as long as the purpose is not exceeded. 313565.ptd Page 16 536566 Brief description of the drawings [Simplified description of the drawings] Fig. 1 is a cross-sectional view showing the first embodiment of the weft injection nozzle of the present invention. Figure 2 is a sectional view taken along line 2-2 in Figure 1. Fig. 3 is a sectional view showing a second embodiment of the weft insertion nozzle of the present invention. Fig. 4 is a view of the ejection opening of the weft insertion nozzle and its surrounding components shown in Fig. 3 as viewed from the right. Fig. 5 is a sectional view showing a third embodiment of the weft insertion nozzle of the present invention. Fig. 6 is a view of the ejection opening of the weft insertion nozzle and its surrounding components shown in Fig. 5 as viewed from the right. Fig. 7 is a sectional view showing a fourth embodiment of the weft insertion nozzle of the present invention. Fig. 8 is a sectional view taken along line 8-8 in Fig. 7. Fig. 9 is a diagram showing another embodiment of the commutator. [Description of component symbols] 10, 50, 80'100 weft insertion nozzles 12, 58, 86, 106 if 16 > 54, 84, 104, 120 commutator 18 nozzle holder 20 weft 22 through hole 24 stopper 26 first Flow path 28 Nut 30 Fluid flow path 32 Annular groove 34 Introduction hole 36, 70, 76, 94, 114 Rectifier wall 38, 72, 74, 96, 116 Rectifier groove 40, 60, 88, 108, 122 commutator Peripheral surface 42, 64, 92, 1 12 '124 2nd flow path

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Claims (1)

536566 VI. Application patent scope 1. A weft-feeding nozzle of a fluid jet loom, comprising: an inner member having a through hole through which weft threads can pass, and an outer member inserted into the inner member, the outer member having an outer periphery similar to the inner member The inner peripheral surface is coaxial with the inner surface. The inner peripheral surface and the outer peripheral surface together form a ring-shaped first flow path and a second flow that is connected to the downstream side of the first flow path and has a flow path cross-sectional area that decreases toward the downstream side. The second end of the second flow path has a jet v for jetting a high-pressure fluid, and at least one of the inner side and the outer side of the cross section of the second flow path corresponding to at least the position of the injection port is formed on two peripheral surfaces. A non-circular shape in which a plurality of unit shapes are arranged at equal angular intervals around the axis of the 2. The weft injection nozzle according to item 1 of the patent application scope, wherein at least one of the inner member and the outer member is formed upstream of the injection port at an equal angular interval with respect to the axes of the two peripheral surfaces. A plurality of rectifying walls. 3. The weft-injection nozzle according to item 1 or 2 of the patent application scope, wherein the outer member includes: the nozzle body in which the inner member is inserted; and the nozzle body is disposed in the nozzle body and forms together with the inner member as Shudi 2 bad component of the flow path. 4. The weft-injection nozzle according to item 2 of the patent application, wherein the rectifying wall reaches at least the aforementioned ejection port. 313565.ptd Page 19