CN86208860U - Auxiliary spray nozzle of a jet loom for drawing weft yarn - Google Patents

Abstract

The utility model provides an auxiliary spray nozzle of a jet loom for drawing weft yarn. The spout of the auxiliary spray nozzle is an additional nest spout. The length and the diameter ratio of the spout are enlarged, so the orientation of the airflow is stable, the spraying angle of the airflow is decreased, and the declination of the spraying out angle is decreased; therefore, under the condition that the function on the end of the weft end from airflow is enhanced, the air supplying amount and air pressure are decreased to obtain ideal airflow weft-guiding effect. The auxiliary spray nozzle can be used on common equipment to process and manufacture and has preferable cost performance.

Description

Auxiliary spray nozzle of a jet loom for drawing weft yarn

The utility model belongs to the textile machine apparatus field, air-jet loom wefting insertion servicing unit.

The pilot jet that present air-jet loom wefting insertion is used is made by a stainless steel thin-wall flat tube.Make a call to the appellation single-orifice type of a hole on the top of flat tube one side, beat the appellation porous type of the concentrated hole of cluster (a plurality of) as spout as spout.Because the restriction of size, the nozzle body tube wall is very thin, then its draw ratio of the spout of single-orifice type pilot jet is very little, after high speed and high pressure gas enters the nozzle chambers of pilot jet from pipeline, longitudinal axis direction (gas channel) along pilot jet flows, the top that arrives nozzle chambers promptly turns to suddenly from spout and sprays, because the draw ratio of spout is little, then the jet angle of air-flow is big, and its velocity attenuation of air-flow ejection back gets soon, and the weft tracting flow direction is just unstable, and have a vortex (normal wefting insertion requires the air-flow of ejection along spraying in the wefting insertion direction set), so not only air consumption increases, so that normal wefting insertion sometimes, maybe needs the wefting insertion that pressurizes.Though porous type chase after help nozzle its draw ratio of spout than single-orifice type more greatly, corresponding jet angle also reduces than single-orifice type, can improve the stability of weft tracting flow direction, but adopt porous simultaneously jet, air consumption is then greater than single-orifice type, because each Kong Jun easily is infected with foreign material at the spout place and causes obstruction less than the hole of single-orifice type, need additional special cleaning machine washing, the air-flow of porous type pilot jet requirement simultaneously must be very clean.Above-mentioned two kinds of nozzles are because tube wall is very thin, and spout is very little, and particularly how the hole of porous type is and littler, and manufacturing technique is all very complicated, use conventional equipment to make qualified products and have any problem, and special equipment then costs an arm and a leg.

The purpose of this utility model is, by the attaching one easy nested spout of making, increased the draw ratio of spout, make the orientation of air-flow stable, jet angle reduces, the deviation of angle of emergence reduces, and the air-flow of ejection is concentrated along the wefting insertion direction and sprayed, thereby can reach better air-jet weft insertion effect with lower supply gas pressure and air demand.

Existing auxilliary anti-nozzle is made up of thin-walled flat tube shape nozzle body (1), nozzle chambers (2) and the spout on a side of nozzle body (1) of top closure, shown in accompanying drawing 1,2,3,4,5,6.

Description of the present utility model:

Spout described in the utility model is the nested spout (3) on the attaching, nested spout (3) has certain length, and its length is far longer than the spout length of existing pilot jet, the jet end of one end (4) of nested spout (3) links to each other with nozzle body (6,7,8,9), other end inlet end (5) is in nozzle chambers (2), inlet end (5) can and nozzle chambers (2) in gas channel be orthogonal, also can be parallel to each other, can also be angled shape, shown in accompanying drawing 7～18.

High speed and high pressure air communication piping enters the nozzle chambers (2) of pilot jet, in nozzle chambers (2), enter the inlet end (5) of nested spout (3) along the top of gas channel arrival nozzle chambers (2), length direction along nested spout (3) flows, spray by jet end (4), because the draw ratio of nested spout (3) is far longer than the draw ratio of existing spout, vortex reduced gradually when the unsettled air-flow that has vortex of original orientation was flowed along the duct, the orientation of air-flow is stable gradually, the jet angle of air-flow reduces, the deviation of angle of emergence reduces, the air-flow that ejects will be concentrated along the wefting insertion direction and spray, the central speed of ejection air-flow is improved, and decay is slow, strengthened the effect of air-flow to the weft yarn end, thereby improved the speed and the wefting insertion linear velocity of air-flow in the special-shaped reed groove, the weft yarn flying speed increases, therefore fill Xu Yinweijiao and enlarge, make the wefting insertion action more be tending towards harmonious with integrated box movement.Use the utility model can reduce the air consumption of pilot jet, under the situation that does not strengthen supply gas pressure, can obtain wefting insertion length arbitrarily, improved the wefting insertion efficient of pilot jet ejection air-flow greatly by the air feed characteristic of the nested nozzle of control.Pilot jet described in the utility model can processing and manufacturing on common apparatus, and preferable performance price ratio is arranged.

Nested spout (3) can be single hole shown in accompanying drawing 7～15, can be that porous is shown in accompanying drawing 16～18.Inlet end (5) in nozzle chambers (2) can be orthogonal with gas channel, as shown in Figure 8, also can be parallel to each other, and shown in accompanying drawing 11,14, can also be angled, as shown in Figure 17.

Nested spout (3) can also have a step with being connected of nozzle body (8), shown in accompanying drawing 14,15.

The material that nested spout (3) can select smooth surface, hardness height such as stainless steel, pottery, aluminium alloy, rhinestone, plastics for use, be difficult for being infected with dust is made.

Fig. 1, Fig. 2 are existing pilot jet front views.

Fig. 3 is the A-A profile of Fig. 1.

Fig. 5 is the B-B profile of Fig. 1.

Fig. 4 is the A-A profile of Fig. 2.

Fig. 6 is the B-B profile of Fig. 2.

Fig. 7, Figure 10, Figure 13, Figure 16 are the utility model front views.

Fig. 8 is the A-A profile of Fig. 7.

Fig. 9 is the B-B profile of Fig. 7.

Figure 11 is the A-A profile of Figure 10.

Figure 12 is the B-B profile of Figure 10.

Figure 14 is the A-A profile of Figure 13.

Figure 15 is the B-B profile of Figure 13.

Figure 17 is the A-A profile of Figure 16.

Figure 18 is the B-B profile of Figure 16.

Claims (3)

1, a kind of air-jet loom wefting insertion pilot jet, it is thin arm flat tube shape nozzle body (1) by top closure, nozzle chambers (2) and the spout on a side of nozzle body (1) etc. are formed, and it is characterized in that described spout is the nested spout (3) on the attaching.

2, air-jet loom wefting insertion pilot jet according to claim 1, it is characterized in that nested spout (3) has bigger draw ratio, concordant the linking to each other of outer surface of its jet end (4) and nozzle body (1), another inlet end (5) is in nozzle chambers (2).

3, air-jet loom wefting insertion pilot jet according to claim 1 and 2, it is characterized in that nested spout (3) inlet end (5) can and nozzle chambers (2) in gas channel be orthogonal, also can be parallel to each other, can also be angled.

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