DE1507790C - Switching device for bag filters - Google Patents

Description

3 4

a control circuit are connected, which ensures that it is permanently arranged. The flushing device sits on the housing 3

that, for example, a multi-way air connection housing 19 controlled by him and on this the double

valve the piston a pneumatic or hydraulic curve piece 18 and above the stationary cylinder 20.

Lischen control current so that the piston in The shaft 16 can be rotated, raised and lowered with her

desired rhythm his Hub- und Senkbewe- 5 lower end in the impeller hub 17, which in the upper

conditions and thus automatically a rotary movement each part of the clean gas suction pipe 6 is attached, stored

executes. and with its upper end, for example, in one

When lowering, the piston also gives a shoulder below the curve piece 18.

Stop or the central shaft via an additional The shaft 16 carries or is indirectly connected

a cam attached to it with another pneu- io with - not shown in this figure -

matic or hydraulic actuating current freely, the cam 22 (A b b. 4), which in the double cam piece 18

via a time switch mechanism and that can be controlled by it, and carries at its upper end

the closing organ flowed through the standing, compressing, firmly attached piston 21.

th purge gas flow in the necessary rhythm for switching the cylinder 20 is via an upper line 25

releases the tube in a pulsating manner. 15 and a lower line 26 with the three-way valve 24

As a result of the use of compressed purging air, which is connected to a pneumatic system via line 23, there is no need for the usual vibration of the filter hoses. table or hydraulic actuating current is supplied. It is possible to use glass fiber or integrated A control circuit, which periodically adjusts the three-way speaking synthetic fiber materials for the tubing valve 24 in a known manner, is possible because only 20 tubing made of these materials is not shown for the sake of clarity,
let shake by blowing. With fiberglass hoses in its lower position, the piston 21 or hoses made of appropriate materials (A b b. 3) releases a further pneumatic or hydraulic throughput of hot gases with a thermal control current by means of a stop 39, doors up to about 300 to 350 ⁰ C possible. The hot gases through the line 27 to a timer 28 interfere with the purge air 25 according to the invention. This does not control the circuit via the connection 29, since the actuating piston with accessories and Spülluftabsperrorgan 30 so that the pending Komdas the rotation causing unit are arranged outside primed scavenging air 13 of the flush valve connector housing 19 of the filter. Individual suction and is fed.

Purge air valves for each chamber are now omitted and there is one in this housing for the switching tube 4

Control gear. 3 ° gland-like ring seal 31 provided, in

In the drawing is an embodiment of the switching tube 4 in its lifting and lowering

Device according to the invention in four images slides in sealing movements again and again,

shown. It shows the pneumatic or hydraulic actuating current to the

Fig. 1 the device in a schematic on-time switch device28 can also by a cam 40,

seen in a round filter, 35 in the vertical shaft 16 below its output

A b b. 2 the same is arranged with four chambers of a double step out of the cylinder 20, triggered

pel series filters that become a cleaning unit. In A b b. 4 is that of the double cam piece 18

are combined, associated curve guidance for the

A b b. 3 shows a vertical section through a cam 22 connected to a right shaft 16 in a

Round filter shown with the switching device and 40 partial development. The route 32 corresponds

A b b. 4 the switching curves of the double cam piece of a piston working cycle that is composed

in partial scope processing. from lifting the piston, remaining the same in

In the case of the round filter 1 (Fig. 1) with six chambers the stroke position, lowering and remaining of the same

mern 2, is that in the switching tube housing 3 rotating, lifting in the lowering position with sealing pressing of the

and lowerable switching tube 4 on one to 45 switching tube to one of the connection openings in the

rinsing chamber switched. The - for the sake of clarity, switching tube housing 3.

offset drawn - connection opening of the pul- lifts the piston 21 and thus the shaft 16,

The purge air supplied is marked with 5, which then strikes a cam 22 on the lower part of the curve

Downward outgoing or clean gas discharge pipe line 33 and is by its inclined guide

denoted by 6. 50 to the uppermost attachment point 34, where it

The four stay together to form a cleaning unit until the piston lowers again: happens

contained chambers 7 (Fig. 2) belong to this, so the cam 22 is by the action of

Double row filter 8th piston pressure and additionally through the piston

The left half of A b b. 3 shows a chamber 2 weight increased by the weight of the directly attached to it

when flushing, the right half a chamber 2a 55 or indirectly connected shaft 16 and the switching

with the normal gas throughput of incoming pipe 4 pressed down against the curve line 35

Raw gas 9 and filtered, extracted clean gas 10. and through their inclined guidance to point 36

The filter hoses 11 can be made of glass fibers, where a lowering curve 38 follows,

stand. For dedusting the incoming raw The lowest position of the piston 21 and thus the

gases 9 are the hoses in the chambers 2a 60 shaft 16 is through the switch attached to it

by their resilient suspension 12 in the stretched tube 4, which is sealingly on the corresponding

Condition kept. In the chamber 2, in which the flushing base parts of the switching tube housing 3 is placed,

air 13 via the connection piece 5 and the switching limit.

tube 4 is introduced pulsating, the cleaning of the filter hoses, d. H. that

Hoses 11 in rhythm with the incoming purging air 65 Purging with pulsating purging air is carried out as follows:

relax a little, which means that the filtered out piston 21 has in the lowest position, for example

Dust relieved. The switching tube 4 is switched via the stop 39 to the pneumatic one

tube housing 3 triggered on the shaft 16 passing through the control current 27 to the timer 28, the

in turn, via the closing element 30, the compressed purging air stream 13 that is present in a pulsating manner to enter the switching tube 4 releases.

This switching tube is triggered when the piston 21 is lowered, for example pneumatically Piston pressure. and additionally by the weights of the piston 21, the shaft 1.6 and the Switching tube 4 itself is soft and finally dampened with its lower connection end in a sealing manner the opposite positions in the bottom of the switching tube housing 3 pressed.

The connected filter chamber 2 is thus switched off from the clean gas flow 10 and becomes pulsating flushed.

Is now by switching the three-way valve 24, the control current supply via line 26 below the piston 21 is guided and this lifts up, the switching tube 4 is not only moved by a distance equal to the piston stroke, but it is raised after a short first piston stroke time by the Guide the cams 22 in the double cam 18 at an angle around the vertical, central shaft 16, which corresponds to the angular distance of the purge air connection openings of two chambers, automatically turned.

However, the full angular rotation is only achieved when the piston clearance is complete, d. i.e. when the piston has reached its lower position again and the rinsing process of the next connected

can use lying chamber. ·

1 sheet of drawings

Claims (3)

2 507 790 1 2, the tube arm as patent claims: Switching tube for the purge air connection from a rotating shaft mounted in the central axis, radially 1. Switching device for bag filters, in particular protrudes outwards. especially for multi-chamber round filters, and for 5 A well-known round filter that works from below combined into a cleaning unit in the hoses entering raw gas according to his Chambers of series filters, for connection of the grain exit from the hoses as pure gas through a primed rinsing air is sucked down to the central suction pipe to be rinsed, Chamber, which is switched off at the same time, has a central, from the clean gas suction by means of a round slide valve that is cylindrical around the 10th and one to be flushed central vertical axis of the filter rotatable, pushes off to chamber from the clean gas suction. one of the inlet openings protruding radially, A rhythmic rotary movement of the rotary valve Switch from opening to opening step by step - to switch to the chamber to be flushed pipe arm that opens with one requires an extensive drive that consists of a edge-adapted mouthpiece is provided and 15 arranged above the filter housing cover, coarser and after each switching from the outer ring gear, a Maltheser gear pair so opening lifted and with a sealing effect as if from additional parts for shaking the filter up the opening edge is lowered, with hoses and for the necessary purge air supply the tube arm is used as a switching tube for the purge air. When the throughput of a hot raw or connection of a clean gas loaded in the "central axis", sealing devices easily step on the round valve Rotating shaft protrudes radially outward, there are difficulties. There is also a risk that characterized in that the hoses are relaxed when the rotary slide valve is shaken shaft (16) at the same time a vertical piston rod is detected. Piston-cylinder unit (20, 21) for one of the other known round filters in the upper end of the filter, with the pressure medium 25 housing cover for each chamber, a suction valve and a purge air valve alternately applied from below and above. These filters also require ble piston (21) and the lifting of a complex drive and components that are disadvantageously exposed to the higher gas temperature initial stroke of the piston and the rotary stroke ratures in the switching tube and its lowering movement from the throughput of hot gases,
of the switching tube from the stroke of the piston, by the way, a round filter is also known, in which each is derived, the upward and downward movement of which chamber is implemented by a radially arranged movement from above through an additional unit in the rotating downwardly continuous pocket filter hose movement. is replaced. Above the round filter cover is a clean 2. Device according to claim 1, characterized in that the gas suction space is arranged in which a indicates that the additional unit is an imaginary vertical filter axis rotatable hollow arm solid, on the filter housing leaning cylinder is provided, each of the ceiling connection opening drical double curve piece (18) with one of the pocket filter hose to be flushed with one sawtooth-shaped curves bounded curve gap connects centrally arranged purge air connection. the is, in which from the rotatable piston rod the necessary, step-by-step switching over to the scavenging air Control cam (22) are guided, for 40 slowing Hohlann rotary movement is over a the upper points (34) of the upper curve pull out the catchy gearing from an electric motor Forms stops while the deepest is resolved. The gear must also be able to adjust the cam by sitting on the wear of the lower hollow arm connection end at one Switching tube (4) is given on the edge of the opening. to avoid simply turning further, when turning 3. Device according to claim 1 and 2, characterized 45 switch the hollow arm and lift it off after characterized in that the switching tube (4) is an S-för- screwing in via the following pocket filter connection is curved pipe bend that lower the height of the opening again. The constantly interrupted one a clean gas suction chamber (3) bridged, the run is not favorable for the electric motor. the a connection housing (19) for compressed flushing circuits are made hard because of damping air (13) is connected upstream. 511 of the engine running at the end of a switching period difficult to do. The same goes for that , necessary, sealing pressure on the lower end of the hollow arm to the respective pocket filter hose connection opening for the purpose of a perfect rinsing die The invention relates to a switching device 55 air supply. device for bag filters, especially for Mehrkamme- According to the invention it is proposed that the rige round filter, and for a cleaning unit rotating shaft at the same time a piston rod perpendicular to a Combined chambers of in-line filters, to the piston-cylinder unit for one at the top Connection of compressed purging air to the respectively to be applied, with the pressure medium alternately from rinsing chamber under which piston can be acted upon at the same time from below and above, and circuit of the clean gas extraction by means of the lifting of the switching tube and its lowering around the central vertical axis of the filter rotatable, movement of the initial stroke of the piston and the to one of the inlet openings protruding radially, rotating deflection of the switching tube from the stroke of the KoI- from opening to opening step-by-step further is derived ", whose up and Baren pipe arm, with a downward movement of the opening edge 65 through an additional unit in the adapted mouthpiece is provided and before and rotating movement is implemented, after each switching from the opening the switching device according to the invention is supplemented raised and with a sealing effect on the opening by additional fittings, which are expedient