CN1120255C

CN1120255C - Picking auxiliary nozzle

Info

Publication number: CN1120255C
Application number: CN01112441A
Authority: CN
Inventors: 中川透; 田中利明; 竹松俊和
Original assignee: Tsudakoma Industrial Co Ltd
Current assignee: Tsudakoma Corp
Priority date: 2000-04-04
Filing date: 2001-04-04
Publication date: 2003-09-03
Anticipated expiration: 2021-04-04
Also published as: DE60104232D1; EP1143053A1; CN1316558A; DE60104232T2; JP2001288644A; KR100470685B1; KR20010094956A; EP1143053B1

Abstract

The weft insert subnozzle for air jet loom, aimed to improve the air ejection speed from an air jet hole, comprises a convex portion forming a spherical convex surface inside the vicinity of the front end of the subnozzle, and an air jet hole formed within the convex portion with its center positioned closer to the front end side than the center of the convex portion.

Description

Picking auxiliary nozzle

The present invention relates to a kind of picking auxiliary nozzle of used in jet loom.

One of pilot jet of this pattern was once open in Japanese Patent Application (KOKA1) 61-174444 number, wherein pilot jet has a recess on the outer surface of the relative side with the wefting insertion side of its leading section, in recess, be shaped on a fumarole, prevent like this warp thread the reed beating motion during with harness motion owing to the edge that contacts fumarole is damaged

But adopt above-mentioned traditional pilot jet, surperficial within it because above-mentioned recess can form a protuberance, the therefore mobile interference of just being sprayed of the air in pilot jet, thus increase the mobile resistance of fluid and reduce jet velocity.

In the picking auxiliary nozzle of air-jet loom, importantly to improve the jet velocity of the air that comes out from puff prot.

There is a protuberance that forms the spherical protuberances surface near the picking auxiliary nozzle of air-jet loom of the present invention fumarole inboard its front end, and being centered close to the local of more close front rather than being positioned at the center of protuberance of fumarole.

If at the inboard protuberance that forms of pilot jet is a spherical surface, can on its whole circumference face, flow equably and have only less resistance along protuberance at the pilot jet leading section so at the air of pilot jet flows inside.

In addition, when the inboard protuberance that forms of pilot jet is spherical surface, near the part of front will be more near the inwall of front end, therefore, because being centered close to the local of more close front rather than being positioned at the center of protuberance of fumarole, air can be at a high speed when the inwall from the pilot jet front end reflects and effectively so that the bigger angle of front is entered in the fumarole immediately.The result just can improve from the jet velocity of the air that fumarole comes out.

Protuberance can be used near the method for compacting spherical surface on the side of front end and makes.

In a more excellent embodiment, when the diameter of protuberance is D, the diameter of fumarole is d, when the distance between protuberance center and the fumarole center is L, following relation: L＜(D-d)/2 is arranged between them.And the leading section that forms protuberance has the flattened cross-section shape.

At least the leading section of pilot jet can be formed by a fumarole spare and a non-fumarole spare butt joint joint that does not have fumarole that is shaped on fumarole, and all available pressing of these two elements is made.

Be described with reference to the accompanying drawings the present invention now, the latter has constituted the part of specification, wherein:

Fig. 1 illustrates an embodiment according to pilot jet of the present invention, and wherein (A) is plane, (B) is the cutaway view that cuts along the 1B-1B line in (A).

Fig. 2 is cutaway view leading section, that amplify of pilot jet shown in Figure 1.

Fig. 3 is the cutaway view that cuts along the 3-3 line among Fig. 2.

Fig. 4 is the cutaway view that cuts along the 4-4 line among Fig. 2.

Consult Fig. 1 to 4, a kind of pilot jet 10 that in air-jet loom, is used as picking auxiliary nozzle shown in it.This pilot jet 10 is formed by a fumarole spare 12 and the non-fumarole spare that is positioned at the wefting insertion side 14 butt joint joints that are positioned at wefting insertion side offside.

Pilot jet 10 is a cylindrical shape, front end sealing, open rearward end.The cross section is distolateral backward following closely gradually becomes that circular mesozone and one follow this mesozone closely, the cross section is that circular base constitutes by a flat front end region, one for pilot jet 10.

The cross section approximate ellipsoidal of front end region, wherein two sides on short-axis direction are flat, and two surfaces on long axis direction are arc.The leading section of pilot jet 10 is more flat, because two side forward end convergence.

Fumarole spare 12 and non-fumarole spare 14 all extend and can both form with lamellar metal material compacting along the axis direction of pilot jet 10.Fumarole spare 12 has a hemispherical protuberance 16 and the fumarole 18 in protuberance 16 in the inside protrusions of leading section.

Protuberance 16 can form with the pressure manufacturing, promptly just can form an inside recess (i.e. Nei Ce protuberance 16) thereon, and punching press to the inside is corresponding to the part of described inside recess with pressing mold punching jetting hole part 12 outer surface of front end with spherical surface 22.Boundary portion (periphery of protuberance) between the flattened side of the convex surface 20 of the protuberance of making like this 16 and fumarole spare 12 all becomes circle in inboard and the outside.

Fumarole 18 can be made with stamped or with boring when protuberance 16 is shaped or thereafter.The central axis of protuberance 16 and fumarole 18 is all vertical with flattened side.

The center of fumarole 18 from the center forward end lateral deviation of protuberance 16 from L.The diameter d of the eccentricity L between protuberance 16 and the fumarole 18 and the diameter D of protuberance 16 and fumarole 18 has the relation of L＜(D-d)/2, and fumarole 18 is to make in the inboard of protuberance 16.

Pilot jet 10 is arranged on the loom like this, makes the offside of fumarole spare 12 towards the wefting insertion side, by non-fumarole spare 14 towards the wefting insertion side.When being arranged on pilot jet 10 on the loom, along with the beating motion of reed and the harness motion of warp thread, the space between the warp thread is opened, and the leading section of pilot jet 10 enters in the shed open of warp thread at least.

When wefting insertion, the compressed air of high pressure is supplied in the pilot jet 10 by predetermined timing, sprays from fumarole 18 with the direction relative with the wefting insertion side by this pilot jet 10, and operation power is applied on the weft yarn of walking.

Because the nonreentrant surface 20 of protuberance 16 be spherical, the pressure-air that flows through pilot jet 10 can be mobile along nonreentrant surface 20 equably, flows through whole circumference and can not be subjected to the big resistance of protuberance 16.

In addition, in pilot jet 10, because its nonreentrant surface 20 is spherical, and the center of fumarole 18 is than the more close front in the center of protuberance 16, the part of more close protuberance 16, that is, the inwall of the part of more close nonreentrant surface 20 front and pilot jet 10 front ends meets, and more air can penetrate from fumarole 18.Therefore the pressure-air that is supplied to pilot jet 10 reflect from pilot jet 10 front bulkhead inner surfaces 24 back, immediately enter fumarole 18 strongly and effectively with a bigger angle and from it in spray, the closer to front, angle is big more.

The result just can improve from the jet velocity that fumarole 18 penetrates.Pressure-air in situation about flowing in the leading section of pilot jet 10 shown in arrow among Fig. 2 26.In the above-described embodiments, two

elements

12 and 14 are all made by metal material, can be bonded together with welding, method such as gluing.But these two

elements

12 and 14 also available other materials such as molded synthetic resin are made.In this case, two elements are by gluing connection.

The present invention is not limited to the foregoing description, can make variations and modifications not leaving under its purpose prerequisite.

Claims

1. the picking auxiliary nozzle of a used in jet loom, comprise, near described pilot jet leading section inboard forms the protuberance on a spherical male surface and a fumarole that forms in said protuberance, the center of described fumarole is than the more close front in the center of said protuberance.

2. picking auxiliary nozzle as claimed in claim 1 is characterized by, and said protuberance is to form by compacting spherical surface on a near side surface the said leading section.