DE2254490A1 - DEVICE FOR SEPARATING FIBERS FROM A TRANSPORT AIRFLOW - Google Patents

Description

Device for separating fibers from a

Transport air flow

The invention relates to a device for separating Fibers from a transport air flow, which is fed through an inlet nozzle into the device, welehe contains a filter and wherein the separated material is expelled. ■

Such a device is used in particular for separating and filling of textile fibers in sacks' used, the fibers in Sack still to be compacted.

Devices are _v for depositing, textile fibers from an air stream are known in which the fibers are deposited by an approximately flat filter "At a constant pressure drop of the filter to ensure that must be cleaned at certain intervals by hand. However, this kind of torture is one of the most unpleasant and very wage-intensive jobs in a spinning mill. Attempts have also been made to guide the transport air flow through an air-permeable filter bag and to collect the retained fibers in this bag. The degree of filling of the bag achieved in this way is, however, relatively small in the case of textile fibers and requires the filter bag to be changed too frequently.

In another known device that is loaded with fibers Air introduced into a filling device, the air being carried away through a filter passage and in an exhaust air duct becomes, ^ while the fibers separated by the filter are placed in a sack fall. A flap is arranged in the exhaust air duct, which periodically interrupts the exhaust air flow, creating an air blow arises in the device, which is used to compact the fibers in the sack. The disadvantages of this Vorrichtuna exist

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in the fact that the air blow affects the whole pneumatic Syster which has to be dimensioned correspondingly stronger / which leads to an increase in the cost of the whole system, and that the "' Air strike causes considerable noise.

It is therefore an object of the invention to address the aforementioned disadvantages to avoid. It is also an object of the invention to refine the air even while the separated air is being expelled Material to ensure that the conveyance of the air is not interrupted or does not have to be interrupted.

The device according to the invention for separating fibers from a transport air stream, which is guided through an inlet nozzle into the device which contains a filter and wherein the separated material is ejected, is characterized by an axially movable plunger for ejecting the fiber material accumulated on the filter, which with is in operative connection with a drive mechanism and has an opening which is in communication with the stationary inlet connection via a passage member, the passage member being in communication, the passage member forming a second filter. f ~ ·.

% .l

Advantages of the device according to the invention are that the filling weights achieved therewith are significantly higher, for example about five times higher than that of bags or containers filled with the transport air flow only. The manual work is limited on a periodic changing of the bags or containers, and the person operating the device is practically no longer dust and air exposed. There are no intermittent loads on the

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matic system, resulting in a longer service life for these parts results. Since the device according to the invention works very quietly, it can easily be set up in a work space.

The passage organ prevents once that during the expulsion movement of the ram on the already cleaned one or more. Fibrous material is deposited in areas of the filter as it covers this area or air flowing through these areas • '■ cleans it beforehand, so that during the backward movement of the ram, no fibrous material can collect in its rear position on its rear side. To the others will be infolqe during the working cycle of the ram of the passage organ, the contaminated air continues to be cleaned by the device according to the invention without interruption, since the passage organ ensures the passage of the air through the filter or the cleaning of the air even during the ejection process, so that the suction is not interrupted or has to be interrupted. .

In the drawing is an example embodiment of the invention Device shown.

It show: ■

Fig. 1 is a vertical section through the device,

FIG. 2 shows a section along line II-II in FIG. 1, and

3 shows a section along the line TII-III in FIG.

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In the drawing, 100 is the housing of the invention Separation device denotes, which is designed essentially cuboid, a cover 110 and a bottom 112 with a central nozzle 114 and side walls 116. The connecting piece 114 has a quick-release fastener, not shown in detail, by means of which an air-permeable sack to be filled can be removably attached to this nozzle.

The housing 100 is by two horizontal partitions 118 and divided into three parts, namely a drive part 120, a middle part 122 and a compression part 124.

In the compression part 124, a displaceable, annular ram 126 is arranged horizontally, which has a fine central opening 128 has. This S ^ össel 126 is shown in Fig. 1 in two positions, the left side in the lower and the right Page in the upper end position is drawn in solid lines. The edge of the plunger 126 is conical, the Diameter increases downwards.

In the plunger 126 there are two parallel to its axis. Threaded sleeves 130 fastened in a diametrical position, which the partition wall 119 enforce and each have a threaded spindle 132 in engagement. The threaded spindles 132 extend through the Middle part 122 and are rotatably mounted in the partition 118 in the drive part 120 in a manner not shown in detail. The top The end of each threaded spindle 132 carries a sprocket 134 connected to it in a torsionally rigid manner.

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The chain wheels 134 are connected to a toothed chain 135 (FIG. 2). Intervention, which additionally has two diametrically arranged Deflection sprockets 136 wrapped around. A motor 138, which is attached to the cover 110, stands with one of the two sprockets Drive connection via a coupling piece 137.

The cover 110 carries a tubular air inlet connection 142, which extends through the drive part 120 and the middle part 122 extends through to the compression part 124. The connecting piece 142 is used during the assembly of the device, e.g. in a spinning mill connected to a supply air line 144, in which preferably a Conveying fan (not shown) is arranged.

The lower end of the inlet port 142 is from one on the Surrounding height of the partition 111 attached retaining ring 146, which carries an annular scraper 148. The scraper 148 cooperates the inside of an inner screen cylinder 150, which is fastened with its lower end to the ram 126. The coaxial to the Stem 126 has arranged filter or sieve cylinders 150, an inner diameter that corresponds to the diameter of the opening 128 The length of the screen cylinder 150 is chosen so that this in the lower end position of the ram through one in the partition 119 provided, central opening 152 extends or ends above this partition.

In the compression part 124, an outer filter or sieve cylinder 154 extends between the partition 119 and the base 112,

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which is arranged coaxially to the plunger 126 and this with low Game surrounds. The screen cylinder 154 is secured by means of ping flanges 156 attached to the partition wall 119 or to the floor 112. Between the. A locking ring 158 is attached to the lower ring flange 156 and the bottom 112. The lock ring 158 consists of a plurality of fan-shaped arranged leaf springs 160 (Fig. 3), the inner ends of which in the closed position in each other overlapping position under \ forsp "change on a rotationally symmetrical. Displacement body 162 abut. The displacement body 162, which adjoins a cylindrical central part 164, has a truncated cone Has end portions 166 and 168, extends coaxially with the plunger 126 and is via a coaxial rod 170 and several radially extending webs 172 at the lower end of the inlet connection 142 attached. ·.

The outer screen cylinder delimits the compression part 124 154 a separation chamber 180 and at the same time forms the inner delimitation of an exhaust air chamber 176, which passes through to the outside the walls 116 is limited. The exhaust air chamber 176 is connected to an "air cleaning unit" (not shown) via a connecting piece 178 connected to which, if necessary, a further fan can be assigned.

The separation chamber 180 is in the upper end position of the ram 126 with the inlet connection 142 in connection, while the annular The outlet opening 182 is closed by the locking ring 158 in the empty state of the chamber.

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Is air laden with fibers into the air via the air supply line 144 If the device is conveyed, it flows through the inlet connection 142 into the separating kairaner 180. The transport air flows in the process through the outer screen cylinder 154 into the exhaust air chamber, while the fibers settle on the inside of the screen cylinder 154 and gradually fill the separation chamber 180. .

The motor 138 is preferably a control circuit (not shown) assigned, which contains, for example, a timer by which the motor is periodically put into operation. at the downward movement of the plunger 126, corresponding to the rotation of the The threaded spindles 132 driven by the motor 138 are used in the. Separation chamber 180 compressed fibers collected. The "displacement body 162 prevents the fibers from escaping into the area of the central stem opening 128. Below that on the fibers the pressure exerted finally opens the locking ring 158, the spring leaves 160 being the one shown on the left in FIG Assume position and release the annular passage 182 .. By the remaining downward movement of the plunger 126 in the lower The fibers are in the final position. Nozzle 114 ejected through it. A sack or a box can be attached to the nozzle or below it, in which the fibers are pressed will or fall into it.

When the lower end position of the ram '126 is reached, the motor reversed by means not shown, e.g. a limit switch; the direction of rotation of the threaded spindles is therefore reversed and the ram is returned to its upper end position. Another

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Limit switch (not shown) stops the motor 138 when the The ram 126 has reached the upper end position. If limit switches are used for reversing and stopping the motor, see above these are preferably arranged in the middle part 122, which is relatively dust-free. The actuation of the limit switches takes place preferentially ' wise through the threaded sleeves 130 or switching cams attached to the same. Instead of a timer, the motor 138 can also be switched on by a device that controls the pressure in the exhaust air chamber 176 or possibly the pressure drop through the outer screen cylinder 154 measures through it. The motor 138 is always switched on when as a result of the on the inside of the screen cylinder 154, i.e. the amount of fiber accumulated in the chamber 180, the pressure in the exhaust air chamber has fallen below a certain level or the pressure difference has reached a predetermined value Has.

As in systems in which the application of the device described Considerable is that strong pressure fluctuations in the air supply line 144 are mostly undesirable or for which they are in the machine room textile work processes are often harmful, the device ensures that the transport air flows away even if the plunger 126 is not in the upper end position. The transport air loaded with fibers will, as results from the illustration on the left in FIG. 1 when it passes through the inner sieve cylinder moving with the ram 126 150 is freed from the fibers and flows off above the stem through the outer screen cylinder 154 into the exhaust air chamber 176.

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The fibers retained by the inner screen cylinder 150 collect above the displacement body 162 until the plunger 126 returns to the upper end position. While the upward movement of the inner screen cylinder 150 becomes the Inside of the same by the scraper 148 of lingering fibers cleaned.

If the ram 126 has left the lower end position, a Part of the fibers still located in the passage 182, under the tendency of the spring leaves 160 to close, back into the chamber 180 pushed back. These fibers also prevent complete closure of the passage 182 through the locking ring 158. However, the locking ring 158 together with the prevents the displacement body 162 or its lower part 168 surrounding, annular Fiber plug a significant leakage of Transport air from the separator 180.

From the above it can also be seen that the displacement body 162 has the function when it is in the upper end position The ram 126 deflects the transport air stream flowing into the chamber 180 through the connector 142 towards the outer screen cylinder 154. In an extended position from the upper end position of the ram, on the other hand, the displacement body 162 has the function of to prevent the passage of uncompacted fiber material into the nozzle 114.

Compared to the illustrated embodiment of the device, various changes would be possible without impairing the mode of operation. For example, it would be conceivable to use the inner sieve cylinder

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150 to be replaced by an air-permeable bellows or hose., which would be attached with its upper end to the inlet connection 142, for example. On the other hand, the lock ring could for example also be formed from resilient tabs that would be attached to the displacement body 162.

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Claims (11)

3206-11 claims 1. Forrichtung for separating fibers from a transport air ^ ν- / flow, vjelcher through an inlet connection in the device is guided, which contains a filter and wherein the separated material is expelled, characterized by an axial movable plunger (126) for ejecting the accumulated on the filter Fiber material with a drive mechanism (132-138). is in operative connection and has an opening (128), which via a passage element (150) with the stationary inlet connection (142) is in communication, wherein the passage member (150) forms a second filter. 2. Apparatus according to claim 1, characterized in that the The ram is displaceable in a separation chamber (180) which contains a displacement body (162) coaxial with the ram axis and has an outlet for separated fiber material, the one Closing member (158) is assigned. 3. Apparatus according to claim 2, characterized in that the separation chamber (180) bounded by an outer strainer body (154) is, and that an inner screen body (150) is attached to the plunger (126) and forms the passage organ. 4 «Device according to claim 3, characterized in that the inner, cylindrically designed screen body (150) is assigned a stationary, annular scraper (148). - 12 - 30982 2/03 1 b 3206 - 12 - 5. Device according to one of the preceding claims, characterized that the opening through which the fiber material is ejected, a through a plurality of approximately radially extending Spring leaves (160), one ends of which are clamped in and the other ends of which are movable, associated with formed locking ring (158) is. 6. Apparatus according to claim 2 and 5, characterized in that the outer ends of the spring leaves (160) are clamped and the inner ends in the closed position with the displacement body (162) cooperate. 7. Device according to one of claims 2-6, characterized in that the outer screen cylinder (154) is surrounded by a collecting chamber (1 " ⁷ O) which has an air outlet (178). 8. Device according to one of the preceding claims, characterized in that that the passage member (150) in the rest position of the plunger (126) is in a position in which it is ineffective, preferably the opening of the plunger only during the working cycle of the plunger with the inlet connection connects. 9. Device according to one of claims 1-3 or 5-8, characterized in that that the passage organ is designed telescopically. - 13 - 309822 / 031b © AD 3206 '- 13 ~ 10. Device according to one of claims 1-8, characterized in that that the passage organ is flexible. - 11. Device according to one of claims 1 - 8, characterized in that that the passage element is designed as a sieve drum. 3098227031b