CN102051754A - Air control system for inserting a weft yarn in a pneumatic weaving loom - Google Patents

Air control system for inserting a weft yarn in a pneumatic weaving loom Download PDF

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Publication number
CN102051754A
CN102051754A CN2010105369387A CN201010536938A CN102051754A CN 102051754 A CN102051754 A CN 102051754A CN 2010105369387 A CN2010105369387 A CN 2010105369387A CN 201010536938 A CN201010536938 A CN 201010536938A CN 102051754 A CN102051754 A CN 102051754A
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China
Prior art keywords
pressure
air supply
open valve
supply system
close
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CN2010105369387A
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CN102051754B (en
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D·佩佐尼
C·兰扎
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Link Holding Machinery Industry Co ltd
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Promatech SpA
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    • DTEXTILES; PAPER
    • D03WEAVING
    • D03DWOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D03D47/28Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein the weft itself is projected into the shed
    • D03D47/30Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein the weft itself is projected into the shed by gas jet
    • D03D47/3026Air supply systems
    • D03D47/3053Arrangements or lay out of air supply systems
    • DTEXTILES; PAPER
    • D03WEAVING
    • D03DWOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D03D47/28Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein the weft itself is projected into the shed
    • D03D47/30Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein the weft itself is projected into the shed by gas jet
    • D03D47/3026Air supply systems
    • D03D47/306Construction or details of parts, e.g. valves, ducts

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)

Abstract

An air supply system to launch (10, 11) or relay (6) nozzle means for a weft yarn in a pneumatic weaving loom is disclosed. The system comprises at least one outlet on/off valve (V 1 ) controlling said nozzle means and further only another inlet on/off valve means (V 2 ) on the air supply conduit pertaining to said nozzle means upstream of said outlet on/off valve (V 1 ); between said two outlet valve (V 1 ) and inlet valve means (V 2 ) there is arranged a storage tank (Tk), of a volume suited to contain sufficient air for at least one weft yarn launch, and a pressure sensor (P) apt to drive said inlet valve means (V 2 ) so as to open when the pressure in the tank (Tk) drops below a preset minimum threshold (Psl) and to close when the pressure in the tank (Tk) rises above a preset maximum threshold (Psu).

Description

Be used for weft yarn is inserted in the air control system for air of pneumatic loom
Technical field
The present invention relates to be used for weft yarn is inserted into the improved air control system for air of air/pneumatic loom.
Background technology
As is known, because weft yarn is inserted in the fact the warp thread shed open by the air-spray that penetrates from suitable ozzle, the loom of air loom and other type differentiates.Typically, be used for the ozzle that the compressed-air actuated pneumatic circuit from the jet ozzle also is used for the inlet of access to plant and is used for arranging along the warp thread shed open, and its forms air-spray relaying ozzle to guide weft yarn better.
Every type the weft yarns different at aspects such as color, counting, textures import (launch) by corresponding specific ozzle.If some fabric provides the insertion of the dissimilar weft yarn of N kind, then therefore loom is provided with N and imports ozzle.The type that depends on the weft yarn that will insert advantageously, is regulated accordingly from the pressure of the air-spray of corresponding importing ozzle, so as to realize using the least possible compressed-air actuated effectively, import rapidly.
Simultaneously, import and between another weft yarn imports at weft yarn, the pressure that must can change this ozzle to be to allow to adapt to time dependent situation, for example because the ambient humidity or the change (when the weft yarn spool uses up) of supplying in advance.
The adjusting that prior art provides different structure and method of operating to realize ozzle pressure.
For example, in US6062273, it is taught on the compressed air line between pressure source and the ozzle pressure sensor is provided, so that have feedback signal, by this feedback signal air supply is controlled under the optimum pressure, so that specific yarn imports.
EP1260622 discloses a kind of system that is similar to the structure of enumerating just now, and wherein pressure regulator is used for maintaining and wishing stress level being arranged in the lung (lung) of next-door neighbour upstream of valve of ON/OFF type of each ozzle of control or compensated chamber.Similarly, represent the document EP 189919 of nearest prior art and EP0279222 to disclose the like configurations that is used for air-pressure controlling, yet, in this structure, be each nozzle set compensated chamber.Particularly, in these several pieces of documents in back, instructed the detecting sensor that the unwinding of the weft yarn that leaves spool speed is provided, so that can provide the self-regulation parameter for pressure.
Yet because the pressure-regulating valve of upstream, compensated chamber is expensive without doubt, mainly from the viewpoint of cost, such structure is not entirely satisfactory.In order to keep good pressure to regulate continuously by choke/choke valve, also be necessary to make the control sensor to have good precision and resolution ratio, and this definitely is expensive.
In addition, have been found that and be difficult to and keep the abundant constant pressure at expulsion at ozzle place as hope ground.Because the motion of the choke valve (choke valve) of the opening/closing of ozzle and the pressure regulator of upstream, compensated chamber, the pressure oscillation infringement yarn qualities of supply air and generation misplug cause the defective in the fabric.
In addition, must be pointed out, imagine the scheme that single compensated chamber is used for all ozzles and have the not satisfied reaction time.In fact, because single compensated chamber is arranged to enough big so that can supply all ozzles, therefore it can not efficiently tackle significant abrupt pressure variation (for example, greater than 4ata), thereby can not supply the ozzle of various yarn according to the only ventilation valve that is arranged in the compensated chamber fully.
For example, if yarn A needs the importing pressure of 6ata and the pressure that yarn B needs 2ata, yarn A and the supply of yarn B subsequently comprise in proper order fully the compensated chamber that discharges by ventilation valve-abrupt pressure of 4ata changes.
Therefore, the supply system that the purpose of this invention is to provide a kind of importing and relaying ozzle, this supply system overcomes aforesaid drawbacks, allows to obtain the control of supply pressure and the adjusting of improvement, so that can obtain more constant importing pressure with the cost lower than the system that provides at present.
Summary of the invention
This purpose realizes by a kind of system, the character of innovation that this system sets forth in having in claims aspect they concrete.
According to a first aspect of the invention, for the importing that is used for weft yarn in the pneumatic loom or relay pipe mouth device provide a kind of air supply system, this air supply system comprises at least one outlet close/open valve of the described ozzle device of control, also comprise supravasal only another inlet close/open valve device of the air supply relevant with the described ozzle device of the upstream of described outlet close/open valve, and wherein between described outlet valve and inlet valve device, be provided with and be suitable for comprising the storage box that is enough to make the volume of air that at least one weft yarn imports, and pressure sensor, this pressure sensor is suitable for driving described inlet valve device, makes to open when being lower than default minimum threshold and to close when presetting max-thresholds when the pressure in the case is elevated to when the pressure in the case drops to.
According to a preferred aspect of the present invention, described pressure sensor is arranged to be used to read the pressure in the described storage box.
According to other aspect, described pressure sensor is arranged to be used for detecting the pressure of the air fill port that leaves case position far away as far as possible.
Additional aspects of the present invention are that ventilation unit also is set between inlet valve device and outlet valve.
According in addition preferred aspect of the present invention, the inlet valve device comprises having at least two close/open valve unit that the default minimum of corresponding difference is opened threshold value.
Description of drawings
In any case, according to the following detailed description of the preferred embodiments more of the present invention that provide and illustrate in the mode of example in the accompanying drawings, will be more obvious according to the other feature and advantage of system of the present invention, wherein:
Fig. 1 is the diagram perspective drawing of prior art loom, and the position of ozzle and relaying ozzle is shown;
Fig. 2-the 4th is applied to the diagrammatic view according to the layout of three different embodiment of system of the present invention that weft yarn imports ozzle;
Fig. 5-the 7th is applied to the diagrammatic view according to the layout of other embodiment of system of the present invention that weft yarn imports ozzle; And
Fig. 8-the 9th is applied to the diagrammatic view according to the layout of other embodiment of system of the present invention of relaying ozzle.
The specific embodiment
Fig. 1 diagrammatically illustrates the pneumatic loom of prior art.Can find as people, it is (a relaying ozzle only to be shown by Reference numeral 10 and the 11 preceding ozzles of indicating with importing ozzle (yarn imports the warp thread shed open by it) and relaying ozzle respectively basically that compressed air is supplied to it so that drive the device of the importing of weft yarn, by Reference numeral 6 expression), yarn is supported and be pulled in the warp thread shed open and reach the end relative with entrance side up to it by this relaying ozzle.
Other device shown in Fig. 1 and pipeline are used to regulate and distribute compressed air from the compressed air source of loom (illustrating by being connected to 2 the arrow of entering the mouth).
Particularly, as shown in Figure 2, each ozzle 11 is connected in a manner known way that this single ozzle of the supply line of compressed air M-specifically be used for or ozzle group-it is therefrom by near the ON/OFF outlet valve V of the entry port that is arranged in the ozzle device 1Separate.And pipeline M is connected to total compressed air distribution ducts of loom.Valve V 1Import the order of magnitude (the order) (therefore with sizable frequency) the opening and closing ozzle inlet of circulation at each with loom speed, put into and interrupt compressed air and flow (in general, if loom is with the frequencies operations of per minute 800 strokes and have two and import ozzle, on average each valve V 1Must be with the frequencies operations of about 800/4/60=6.6Hz).
According to the present invention, at feeding mechanism M and valve V 1Between also arrange air storage tank T K, and this air storage tank is by the second ON/OFF inlet valve device V 2M separates with feeding mechanism.According to essential feature of the present invention, case T KHave at least one that be suitable for comprising from a weft yarn of ozzle 11 and import the volume of required air capacity.For example, this case has the volume of 0.8-1.2lt and typically operates with the operating pressure of about 2-6 crust.
Because the volume of case and working law during transition stage are (that is, when passing through close/open valve V 1Or V 2During formation air flow among both), case T KBe preferably cylindrical shape and elongated, have depth-width ratio particularly greater than 10.
This system also passes through pressure sensor P and perfect, and this pressure sensor is suitable for providing control the second ON/OFF inlet valve device V 2Conditioning signal.
Pressure sensor P is arranged in close/open valve V 1And V 2In any one position between the two, between these two valves, the loop has identical pressure in theory under static conditions.Sensor P therefore can be for example also just at the first ON/OFF outlet valve V 1Upstream (Fig. 4).
Have been found that best adjusting behavior preferably obtains (Fig. 2 and 3) at setting pressure sensor P so that read under the situation of the pressure in the case TK.
(Fig. 2) according to a preferred embodiment of the invention, sensor P is arranged in the bottom of case TK, promptly is arranged in the opposed end that is provided with the end that is used for compressed-air actuated inlet and fill port.In fact, in these situations, have been found that this sensor to not too responsive, and therefore it provides the signal that is more suitable for obtaining not have instable effective adjusting at the pressure wave of in case, propagating during the transition stage.
As shown in Figure 2, case T KPreferably have single load/unload filling/discharge port, T joint connector is installed on this port, and this T joint connector is connected to inlet valve device V with the loop 2With outlet valve device V to ozzle 11 1Alternatively, two fillings of case are different with discharging port, but still are arranged on the same bottom of case.
Fig. 3 illustrates alternate embodiment, wherein fills and discharges port and be positioned at case T KTwo relative ends.In this case, in order to regulate regularity, pressure sensor P preferably is arranged to read approximately by case T KThe case T of centre of extension KInterior pressure.
Functionally, this system is configured to work as follows.Open ON/OFF inlet valve V 2And with compressed air filling box T K, reach by the detected upward pressure threshold value of sensor P Psu up to it.In this point, valve V 2Close and system's preparation parallel importing.At the moment that the loom control logic is determined, outlet valve V 1Open and case TK in available compressed air be used for carrying out parallels and import by ozzle 11.As outlet valve V 1When closing once more, if probe P detects case T KIn pressure dropped to and be lower than lower threshold value Ps1, then reopen inlet valve V 2, this realizes case T KRecharge.Typically, because case T kBe designed to appropriate size so that have the volume that is enough at least one importing, case T KFilling and relative pressure fluctuation occur in one import and next the importing between transition stage in.
Described two threshold pressures by the control logic of loom based on limiting from the concrete yarn that ozzle is imported into; These threshold values also can change when changing the profile condition during operation, for example, and based on the weaving condition of temperature and humidity.
As conceive, said system also has intrinsic downward pressure regulating power, because identical ozzle serves as ventilation valve with air sucking-off loop and reduce outlet/inlet valve V 1And V 2Pressure between the two.Obtain bigger regulating power if necessary, specific ventilation valve V also can be provided 3, this ventilation valve V 3Be arranged in inlet valve device V 2With outlet valve V 1Between the two.Ventilation valve V 3Can be arranged among the different embodiment, as shown in Fig. 5-7.Preferably, as shown, ventilation valve V 3Be arranged in case T KThe upstream of fill port.
Fig. 8-9 illustrates the embodiment of the system that is applied to the relaying ozzle.In Fig. 8, also be provided with ventilation valve V 3
In this specific embodiment, case T KBe designed to suitable dimension so that can supply air to being used for all relaying ozzles that whole parallel imports.Owing to the pressure that the relaying ozzle is required is substantially the same, so single case T KCan supply all relaying ozzles simultaneously.Under specific situation, advantageously, sequenced two (or more) relayings ozzle casees (one is used for relaying ozzle group 1...n and one and is used for relaying ozzle group n+1...m) are provided, and from the viewpoint of operation and pressure filling, these two repeater boxs are identical.
For can be at different time control relaying ozzle 6, support shute fully when weft yarn passes the warp thread shed open provides a plurality of outlet valve V 1a-V 1n, this outlet valve is used for each relaying ozzle or ozzle group.
According to other embodiment, owing to need have more air flows or the fastest pressure decline, described inlet valve device V 2Comprise inlet valve unit more than one.In this layout, typically when the operation of a large amount of relaying ozzles, commutate for providing level and smooth pressure to regulate and reducing main valve, preferably, do not open and close two valves simultaneously together, but be that two valves are provided with two different slightly threshold values (that is the difference of 0.1 crust) of opening.In this case, can regulate the operation of two valve cells.If for example, the pressure in the case reduces, then first valve cell is opened: under low air consumption condition, this is enough, and under stable condition, only opens and closes first valve cell; If air consumption is bigger, it is much higher and also will start second valve cell that then pressure reduces gradient: under this condition, can cause first valve cell to keep opening continuously, and second valve cell commutates according to pressure.
As what can show from above description, the scheme that proposes allows to realize the target of hope here.
Particularly, be arranged in ON/OFF entrance and exit valve and use under the situation of single pressure sensor between the two at case, the constant pressure that can obtain to wish is regulated and is not used expensive pressure regulator in the ozzle porch.In essence, during the lead-in stage of weft yarn, it is fully constant that the pressure in the ozzle 11 keeps, though there is not to be provided with even to allow the flap valve of the costliness of air flow between the introduction period.
Because case T KHave the fact that is suitable for supporting the volume that at least one weft yarn imports, so sensor P can be with low precision and resolution operation, for example, between two threshold value Psu that are separated from each other 0.1 crust and Ps1: this advantageously influences the economy of sensor.
Yet, be to be understood that, the special structure that the invention is not restricted to illustrate above, these special structures are only represented the non-limitative example of scope of the present invention, but many modification are possible, all those skilled in the art in one's power in the scope, and do not depart from as scope of the present invention defined in the appended claims.

Claims (8)

1. one kind is used for the importing (10,11) of weft yarn or the air supply system of relaying (6) ozzle device in pneumatic loom, comprises at least one outlet close/open valve (V of the described ozzle device of control 1), it is characterized in that,
This air supply system also comprises only another inlet close/open valve device (V 2), this inlet close/open valve device (V 2) at described outlet close/open valve (V 1) the upstream, be positioned on the air supply conduit relevant with described ozzle device, and
At described outlet close/open valve (V 1) and inlet close/open valve device (V 2) be furnished with storage box (T between the two K) and pressure sensor (P), described storage box (T K) volume be suitable for comprising the air that is enough to make at least one weft yarn to import, this pressure sensor is suitable for driving described inlet close/open valve device (V 2), make as case (T K) in pressure drop to when being lower than default minimum threshold (Ps1) and open, and as case (T K) in pressure close when being elevated to greater than default max-thresholds (Psu).
2. the air supply system described in claim 1, wherein, described pressure sensor (P) is arranged to read described storage box (T K) interior pressure.
3. the air supply system described in claim 2, wherein, described pressure sensor (P) is arranged to detect apart from case (T K) air fill port position far away as far as possible in pressure.
4. the air supply system described in any one of claim as described above, wherein, described storage box (T K) be columnar and elongated, preferably have depth-width ratio greater than 10.
5. the air supply system described in claim 4, wherein, described storage box (T K) have fill port and discharge port at place, same end.
6. the air supply system described in any one of claim as described above, wherein, at described inlet close/open valve device (V 2) and described outlet close/open valve (V 1) between also be provided with ventilation unit (V 3).
7. the air supply system described in claim 6, wherein, described ventilation unit (V 3) be arranged in described storage box (T K) the upstream.
8. the air supply system described in any one of claim as described above, wherein, described inlet close/open valve device (V 2) comprise having at least two close/open valve unit that corresponding difference is preset minimum threshold (Ps1).
CN201010536938.7A 2009-11-09 2010-11-09 Air control system for inserting a weft yarn in a pneumatic weaving loom Active CN102051754B (en)

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EP09425450A EP2319968B1 (en) 2009-11-09 2009-11-09 Air control system for inserting a weft yarn in a pneumatic weaving loom
EP09425450.5 2009-11-09

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CN102051754B CN102051754B (en) 2014-07-23

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102808273A (en) * 2011-05-31 2012-12-05 株式会社丰田自动织机 Air supply system in air jet looms
CN103764889A (en) * 2011-06-15 2014-04-30 必佳乐公司 Air supply system for airjet weaving machine

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6119557B2 (en) * 2013-10-29 2017-04-26 株式会社豊田自動織機 Compressed air pressure control device for air jet loom

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US4534387A (en) * 1982-01-18 1985-08-13 Ruti-Te Strake B.V. Method and apparatus for inserting different weft threads having different properties into the warp shed of a jet weaving machine
EP0189919A1 (en) * 1985-01-30 1986-08-06 Vilminore Officine Meccaniche S.P.A. Device for the automatic control of the weft yarn feed in air looms
CN1605669A (en) * 2003-10-08 2005-04-13 株式会社丰田自动织机 Filling insertion controlling device of jet loom
CN1876920A (en) * 2005-06-09 2006-12-13 Smit私人股份公司 Air feeding and control device for the pneumatic transporting of the weft in air-jet weaving machines
CN2869054Y (en) * 2005-12-31 2007-02-14 江苏万工科技集团有限公司 High-pressure air flow conveying device of air jet loom
CN1932106A (en) * 2006-06-15 2007-03-21 江苏万工科技集团有限公司 Pneumatic-electric control device of weft insertion groove airflow detector
US20090065086A1 (en) * 2007-09-12 2009-03-12 Sultex Ag Method For The Pressure Regulation In A Weaving Machine And Weaving Machine With A Pressure Regulating System

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IT1201202B (en) 1987-01-26 1989-01-27 Omv Off Mecc Vilminore SELF-REGULATING DEVICE FOR FEEDING WEFT YARNS IN AIR WEAVING FRAMES
BE1010015A3 (en) 1996-02-09 1997-11-04 Picanol Nv Apparatus for supplying compressed air to a main blower of a weaving machine.
DE10124290C1 (en) 2001-05-17 2003-01-23 Dornier Gmbh Lindauer Jet weaving machine, in particular air jet weaving machine with a weft insertion system

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Publication number Priority date Publication date Assignee Title
US4534387A (en) * 1982-01-18 1985-08-13 Ruti-Te Strake B.V. Method and apparatus for inserting different weft threads having different properties into the warp shed of a jet weaving machine
EP0189919A1 (en) * 1985-01-30 1986-08-06 Vilminore Officine Meccaniche S.P.A. Device for the automatic control of the weft yarn feed in air looms
CN1605669A (en) * 2003-10-08 2005-04-13 株式会社丰田自动织机 Filling insertion controlling device of jet loom
CN1876920A (en) * 2005-06-09 2006-12-13 Smit私人股份公司 Air feeding and control device for the pneumatic transporting of the weft in air-jet weaving machines
CN2869054Y (en) * 2005-12-31 2007-02-14 江苏万工科技集团有限公司 High-pressure air flow conveying device of air jet loom
CN1932106A (en) * 2006-06-15 2007-03-21 江苏万工科技集团有限公司 Pneumatic-electric control device of weft insertion groove airflow detector
US20090065086A1 (en) * 2007-09-12 2009-03-12 Sultex Ag Method For The Pressure Regulation In A Weaving Machine And Weaving Machine With A Pressure Regulating System

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102808273A (en) * 2011-05-31 2012-12-05 株式会社丰田自动织机 Air supply system in air jet looms
CN102808273B (en) * 2011-05-31 2014-07-02 株式会社丰田自动织机 Air supply system in air jet looms
CN103764889A (en) * 2011-06-15 2014-04-30 必佳乐公司 Air supply system for airjet weaving machine
CN103764889B (en) * 2011-06-15 2016-03-16 必佳乐公司 For the air supply system of air-jet loom

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EP2319968B1 (en) 2013-01-02
EP2319968A1 (en) 2011-05-11

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