CN2263117Y

CN2263117Y - Pneumatic constant tension device for sizing machine

Info

Publication number: CN2263117Y
Application number: CN 96231704
Authority: CN
Inventors: 罗国安; 石乐兵
Original assignee: HAITIAN TEXTILE MACHINERY TECHNOLOGY TRADE DEPARTMENT HAIMEN CITY
Current assignee: HAITIAN TEXTILE MACHINERY TECHNOLOGY TRADE DEPARTMENT HAIMEN CITY
Priority date: 1996-04-19
Filing date: 1996-04-19
Publication date: 1997-09-24
Anticipated expiration: 2006-04-19

Abstract

The utility model relates to a pneumatic constant tension device for a sizing machine, which is composed of a tension detecting device, an air pressure setting device, an automatic constant pressure device, a pneumatic brake device, etc. The utility model is characterized in that the tension detecting device is linked with an air inlet and outlet automatic control valve which can inflate or deflate a pneumatic braking cylinder of warp beams; by regulating the braking force of the warp beams from the pneumatic braking cylinder automatically, the utility model can achieve the goal of constant tension. Instead of the home-made belt weight dropper tension regulation device of a sizing machine, the utility model can reduce 70% to 80% refuse yarn, can make warp tension uniform, can reduce end breakage rate, can enhance weaving efficiency and weave quality and can effectively prevent yarn stacking failures.

Description

The pneumatic constant tension device of Sizing machines

The pneumatic constant tension device of Sizing machines belongs to a kind of pneumatic actuator of textile machine, specifically is applied to the pneumatic actuator of the constant warp tension of Sizing machines.

Existing homemade sizing machine chaine tension force is regulated by the simple and easy method of increase and decrease belt weight on the brake wheel of axle two ends, and this weak point with belt weight control warp tension is:

1, weight weight is inconsistent, makes each mutual tension force of warp thread on axle inconsistent, and the yarn percentage elongation height that tension force is big makes through axle to remain the how much inconsistent of yarn.The sizing operation is an important ring of whole textile technology process, and the sizing operation provides beam of a loom for weaving, and the quality of sizing process quality directly influences loom efficiency and fabric quality.According to fabric variety, during the Sizing machines ordinary production to beam of a loom simultaneously driven conveying warp thread generally have 8-20 only through axle greatly, (the general cylinder yarn that is called of textile industry) is along with warp thread is constantly batched by beam of a loom, the diameter of yarn constantly diminishes on axle, supposes through the axle frictional resistance moment constantly, and then yarn beam diameter diminishes, the arm of force of its rotation of traction is diminished, warp tension becomes greatly gradually, and the spinner can only suitably increase and decrease the gravity of belt weight with feel, to change the brake belt to the size through the brake weight of axle.The ladder of the relativity of feel tension force and weight plus-minus, each warp tension when axle is rolled onto on the beam of a loom differs greatly.As long as one group of beamed yarn in axle uses up, all the other all as refuse yarn, generally reach 15 kilograms through the remaining yarn of axle, waste bigger;

2, the irregular high slashing strength of tension force that also makes of tension force reduces, and end breakage rate increases when weaving cotton cloth, and reduces work efficiency, easily produces and stops car weft crackiness defective cloth, and the height of slashing strength also makes the cloth cover out-of-flatness;

When 3, Sizing machines chance emergency in service was shut down suddenly, the belt weight did not overcome the inertia force that rotates through axle greatly to the frictional force through the axle brake wheel, and continuing rolls forward send yarn; easily cause and gush the yarn phenomenon; get rid of and gush the yarn fault, operation is made troubles, also influence Sizing machines efficient.

The purpose of this utility model provides a kind of technical scheme of controlling the sizing machine chaine Zhang Lixin, makes the sizing machine chaine even tension, reduces refuse yarn, meets not produce when stopping in emergency and gushes yarn, improves the Sizing machines work efficiency.

Technical solutions of the utility model are achieved in that the pneumatic constant tension device of Sizing machines is made up of warp tension sniffer, air pressure setting device, automatic constant-pressure device, pneumatically operated brake and compressed air source etc., it is characterized in that: the warp tension sniffer is made up of T shape support, jockey pulley, balancing cylinder, balancing spring etc., the crosspoint of T shape support and lower extreme point kink are on two parallel jockey pulleys, and balancing cylinder, balancing spring are connected with the two ends of T shape support; The automatic constant-pressure device is by turnover gas autocontrol valve, the gentle cylinder serial connection of stopping of adjustable throttling, the spool of turnover gas autocontrol valve and the interlock of T shape support; The air pressure setting device is connected by the pressure regulation lever with adjustable pressure-reducing valve by the hand adjustment cam; Pneumatically operated brake is linked to each other with brake lever one end by the stop push rod of cylinder of gas, and the brake lever other end links to each other with chain by fulcrum, brake rubber block in the inboard obvolvent of chain on the brake wheel at axle two ends.Turnover gas autocontrol valve is matched by the otch cylinder of spool and the inner cylinder grinding of valve body, spool and the interlock of T shape support.On the valve body of turnover gas autocontrol valve A, B, C three holes are arranged, the A hole connects compressed air source, joins with the gas of the pneumatically operated brake cylinder of stopping behind the serial connection adjustable throttling of B hole, and the C hole communicates with atmosphere.Its principle is: hand adjustment cam present position is corresponding with certain constant air pressure of adjustable pressure-reducing valve output, warp thread is S-shaped walks around two jockey pulley surfaces, in case warp tension changes, jockey pulley produces moment, promoting T shape support immediately vacillates now to the left, now to the right around the jockey pulley axle center, spool waves with jockey pulley interlock, and spool is constantly made the corresponding change that gas is stopped cylinder charge, kept or exit according to the tension force size, to keep the gas certain air pressure of cylinder of stopping; Pneumatically operated brake is promoted the brake lever tension or is unclamped chain and the brake rubber block of obvolvent on the brake wheel surface by the gas cylinder of stopping, and realizes the braking action through axle.

The utility model has the advantages that the gas cylinder internal gas pressure of stopping is constant, then constant to the brake weight of brake wheel on axle head by stop cylinder, brake lever of gas, reach the constant unanimity of warp tension on the Sizing machines, warp thread is no special elongation or the irregular phenomenon of degree of tightness each other, so sizing quality is stable, helps improving weaving efficiency; The residue refuse yarn reduces 70%-80% on axle greatly; As the Sizing machines emergency shutdown, then, brake fast through axle greatly because the automatically controlled guiding valve of two-position five-way output pressure-air directly enters the gas cylinder of stopping, no longer include and gush the yarn fault and take place, operation has been brought convenience.

The pneumatic constant tension device of Sizing machines is further described for embodiment below in conjunction with accompanying drawing.Fig. 1 is the pneumatic constant tension device principle schematic of Sizing machines.

Fig. 2 is in B, C hole communicating state for turnover gas autocontrol valve.

Fig. 3 is in A, B hole communicating state for turnover gas autocontrol valve.Among the figure: 1 is T shape support, and 2,3 is jockey pulley, and 4 is balancing cylinder, and 5 is balancing spring, 6 are turnover gas autocontrol valve, and 7 is adjustable throttling, and 8 is the automatically controlled guiding valve of two-position five-way, 9 are turnover gas autocontrol valve spool, and 20 is valve body, and 10 is the tension force pointer, 11 are the hand adjustment cam, and 12 is adjustable pressure-reducing valve, and 13 are the pressure regulation lever, 14 are the gas cylinder of stopping, and 15 is brake lever, and 16 is chain, 17 is brake rubber block, and 18 is brake wheel, and 19 for greatly through the axle spindle nose.

Compressed air source is by the air compression station or the small-sized air compressor (0.5m of central gas supply ³/ min) provide, source of the gas divides directly feed two-position five-way automatically controlled guiding valve 8 at two the tunnel: the one tunnel, and another road enters the automatically controlled guiding valve 8 of two-position five-way after adjustable pressure-reducing valve 12 decompressions, and this valve is the domestic standard pneumatic element, be alternately to promote valve core of main valve, make the gas circuit commutation by two electromagnetic pilot valve signals.Because of its valve is provided with positioner, then this system valve has memory performance in addition.So receive the path in the valve A hole of turnover gas autocontrol valve 6 from the automatically controlled guiding valve outlet of two-position five-way, can be according to automatically controlled signal at this path by high pressure or low-pressure compressed air to this valve input.Hand adjustment cam 11 is by lever 13 and balance pivot O ₃Adjustable pressure-reducing valve 12 is regulated, controlled and set the size that a certain pressure is corresponding permanent tension force.From greatly through the full axle of axle to machine generally adjust 2-3 time and get final product.The warp tension sniffer of forming by T shape support 1,

jockey pulley

2,3, balancing cylinder 4, balancing spring 5, S-

shaped jockey pulley

2,3 surfaces of walking around of warp thread, warp thread is driven conversion rate with weaving-reel of starching-yarn machine coiling speed, and the warp thread pace is faster, then tension force is bigger, otherwise then little.The tension force sniffer reflects tension variation very delicately, and tension force pointer 10 just swings.For example tension force is higher, pointer is swung left, turn to A, the B hole position (Fig. 3) that communicates with the spool 9 of the turnover gas autocontrol valve 6 of tensioner interlock, low-pressure compressed air enters the gas cylinder of stopping, and promotes brake lever 15, tension drag chain 16 and brake rubber block 17, brake wheel 18 brake weights through the axle two ends are strengthened, make it to slow down, slack-off, reduce tension force.Otherwise slack-off when warp thread speed, tension force is on the low side, pointer is put to the right, and turnover gas autocontrol valve spool 9 turns to B, the C hole position (Fig. 2) that communicates, the gas cylinder 14 outside exhausts of stopping, brake lever 15 right-hand members are drop-down, loosen the brake weight of 17 pairs of brake wheels 18 of brake rubber block, and the warp thread tension force that speeds up increases.Fig. 1, turnover gas autocontrol valve spool present position is logical for the B hole when reaching normal operation for the warp tension adjustment, and A, C hole are obstructed, constant tension.Tension force one changes, and turnover gas autocontrol valve is just regulated automatically.Be serially connected in stop adjustable throttling 7 between cylinder 14 and the turnover gas autocontrol valve 6 of gas, make the gas cylinder cylinder of stopping move unlikely too fast impacting, play certain time-delay and buffering effect.When warp thread halted, warp tension was zero, and turnover gas autocontrol valve spool forwards A, the B hole position that communicates to, connected automatically controlled guiding valve 8 to the gas cylinder 14 input high pressure gas of stopping by automatically controlled signal, braked fast through axle greatly, no longer included to gush the yarn fault and take place.Among Fig. 1 from adjustable throttling 7 to gas stop cylinder carry compressed-air actuated branched pipe b1 arranged side by side, b2 ... bn.Each branched pipe all can connect a brake device, and its structure is identical with principle, thus the wherein one group of brake device that only draws here, all the other omissions.

Claims

1, the pneumatic constant tension device of Sizing machines is made up of warp tension sniffer, air pressure setting device, automatic constant-pressure device, pneumatically operated brake and compressed air source etc., it is characterized in that:

The warp tension sniffer is made up of T shape support (1), jockey pulley (2) (3), balancing cylinder (4), balancing spring (5), and the crosspoint of T shape support and lower extreme point kink are at two parallel tension force roll shaft O ₁, O ₂Axle head on, balancing cylinder (4), balancing spring (5) are connected with the two ends of T shape support (1);

The automatic constant-pressure device is connected in series with the gentle cylinder of stopping of adjustable throttling (7) (14) by turnover gas autocontrol valve (6), spool (9) and T shape support (1) interlock;

The air pressure setting device is connected by pressure regulation lever (13) with adjustable pressure-reducing valve (12) by hand adjustment cam (11);

Pneumatically operated brake is linked to each other with brake lever (15) one ends by the stop push rod of cylinder (14) of gas, and brake lever (15) is by fulcrum O ₄After, the other end links to each other with chain (16), brake rubber block (17) in the inboard obvolvent of chain (16) on the brake wheel (18) at axle two ends.

2,, it is characterized in that passing in and out gas autocontrol valve (6) and match spool (9) and T shape support (1) interlock by the otch cylinder of spool (9) and the inner cylinder grinding of valve body (20) according to the pneumatic constant tension device of the described Sizing machines of claim 1.

3, according to claim 1 or the pneumatic constant tension device of 2 described Sizing machiness, it is characterized in that passing in and out on the valve body (20) of gas autocontrol valve (6) A, B, C three holes are arranged, the A hole connects compressed air source, join with the gas of the pneumatically operated brake cylinder of stopping behind the B hole serial connection adjustable throttling, the C hole communicates with atmosphere.