DE102019104784B4 - Switching device - Google Patents

Abstract

The invention relates to a switching device, comprising a connection device (1) having a plurality of first connection pairs (1.1) and a second connection pair (1.2) adjustably mounted on the connection device (1) and pneumatically connectable to the first connection pairs (1.1) (1) A bypass line (2.1) is provided to enable a pneumatic short circuit on the second connection pair (1.2). According to the invention, in addition to the bypass line (2.1), at least one further bypass line (2.2) is provided and at least one of the bypass lines (2.1, 2.2) is arranged between first connection pairs (1.1).

Description

The invention relates to a switching device according to the preamble of claim 1.

A switching device of the type mentioned is from the document EP 2 690 363 A2 known. This switching device consists of a connection device having a plurality of first connection pairs and a second connection pair adjustably mounted on the connection device and pneumatically connectable to the first connection pairs, a bypass line being provided on the connection device to enable a pneumatic short circuit on the second connection pair. In this solution, in which the second connection pair is mounted on the connection device so as to be displaceable relative to the first connection pairs with the aid of a slide or the like, the bypass line is used to automatically remove blockages in the central suction line.

The invention is based on the object of improving a switching device of the type mentioned at the beginning. In particular, a switching device that can be emptied particularly easily after each delivery cycle is to be created.

This object is achieved with a switching device of the type mentioned at the outset by the features listed in the characterizing part of claim 1.

According to the invention it is therefore provided that in addition to the bypass line at least one further bypass line is provided and at least one of the bypass lines is arranged between first connection pairs.

In other words, the switching device according to the invention is characterized in that the above-mentioned carriage for the second pair of connections now has to be moved back and forth considerably less to empty the conveyor lines, because according to the invention a bypass line is practical and particularly preferred next to each first pair of connections is arranged so that the conveying cycle (and also the turbine run) itself does not have to be interrupted for emptying the conveying line, whereby it is particularly ensured that the lines to the intermediate container, which will be discussed in more detail below, each time the second pair of connections is moved be blown free.

Other advantageous developments of the switching device according to the invention emerge from the dependent claims.

For the sake of completeness, reference is made to the document EP 2 592 026 A1 pointed out. This discloses a suction conveyor system in which a pneumatic short circuit is provided between the individual removal devices.

The switching device according to the invention including its advantageous developments according to the dependent claims is explained in more detail below with reference to the drawing of a preferred exemplary embodiment.

• 1 im Schnitt von der Seite die erfindungsgemäße Umschaltvorrichtung;
• 2 in Seitenansicht als Einzelteil die Anschlusseinrichtung mit den ersten Anschlusspaaren und den Bypassleitungen, aber ohne das zweite Anschlusspaar;
• 3 in Draufsicht von oben die erfindungsgemäße Umschaltvorrichtung gemäß 1;
• 4 in Draufsicht die Anschlusseinrichtung gemäß 2;
• 5 in Seitenansicht als Einzelbaugruppe das zweite Anschlusspaar; und
• 6 in Draufsicht das zweite Anschlusspaar gemäß 5.

It shows (not to scale)

• 1 in section from the side, the switching device according to the invention;
• 2 in side view as an individual part of the connection device with the first connection pairs and the bypass lines, but without the second connection pair;
• 3 in plan view from above the switching device according to the invention according to 1 ;
• 4th in plan view the connection device according to 2 ;
• 5 the second pair of connections in a side view as a single assembly; and
• 6th in plan view the second connection pair according to 5 .

The switching device shown in the figures initially consists in a known manner of a plurality of first connection pairs 1.1 having connecting device 1 and one adjustable on the connection device 1 stored and with the first connection pairs 1.1 pneumatically connectable, second connection pair 1.2 , with the connection device 1 to enable a pneumatic short circuit on the second connection pair 1.2 a bypass line 2.1 is provided.

Furthermore, it is provided in a manner known per se that the second pair of connections 1.2 on the one hand (ie with a first connection) with a supply air line and on the other hand (ie with a second connection) with a suction line is formed. The supply air line is also designed to be provided with a turbine. In addition, the supply air line and the suction line are connected to their second pair of connections 1.2 opposite end connected to an intermediate container for wood pellets. Furthermore, every first connection pair is 1.1 connected via so-called branch lines with a suction probe arranged in a storage room for wood pellets.

From the above description it follows that with the turbine, first of all, a negative pressure and a vacuum in the supply air line on the intermediate container side An overpressure is generated on the branch line side, which ensures that wood pellets are transported out of the storage room via the suction probe and via the suction air line side branch line and to the intermediate container, from where the wood pellets are then fed to a boiler for combustion.

It is now essential for the switching device according to the invention that in addition to the bypass line 2.1 at least one more bypass line 2.2 provided and at least one of the bypass lines 2.1 , 2.2 each between the first connection pairs 1.1 is arranged.

From this stipulation, and in contrast to the aforementioned prior art, for the operation of the switching device, in particular, that each time the second connection pair is changed 1.2 from one to the next first pair of connections 1.1 the suction line via the bypass line 2.1 , 2.2 is emptied. It is also particularly preferably provided that the turbine when the second pair of connections is changed 1.2 from one pair of connections to the next 1.1 remains switched on, i.e. not switched off separately.

Like in particular from 4th can be seen, it is particularly preferably provided in all of this that next to each first pair of connections 1.1 a bypass line 2.1 , 2.2 is arranged.

In addition, in order to be able to use as many suction probes as possible in the storage room or storage rooms, they are preferably on the connection device 1 more than five, preferably more than ten, first connection pairs 1.1 arranged.

As can also be seen from the figures, it is preferably provided that the connection device 1 is designed as a preferably flat plate.

It is also particularly preferably provided that the first connection pairs are on one side of the plate 1.1 and the bypass lines 2.1 , 2.2 are arranged.

Furthermore, in the illustrated preferred embodiment, the plate has the first connection pairs in the area of arrangement 1.1 and the bypass lines 2.1 , 2.2 each through openings 1.3 on.

As in particular from the 1 and 2 can be seen, it is also preferably provided that each bypass line 2.1 , 2.2 is designed as a 180 ° pipe bend.

As can be seen in particular from the synopsis of 1 and 3 results, it is also particularly preferably provided that the second pair of connections 1.2 along the through openings 1.3 Is designed to be longitudinally displaceable on the plate.

Furthermore, with reference to 4th particularly preferably provided that the first connection pairs 1.1 along a straight line 3 extends are arranged, in which case (see the 3 , 5 and 6th ) the second pair of connections 1.2 two, in terms of the straight line 3 having, preferably angled, connecting pieces arranged one behind the other.

In this case it is also preferably provided that each first pair of connections 1.1 two, in terms of the straight line 3 has connecting pieces arranged obliquely to one another, preferably offset by 30 ° to 60 °.

In addition, it is provided in this case that each bypass line 2.1 , 2.2 two (plate-side), in relation to the straight line 3 has connecting sections arranged obliquely to one another, preferably offset by 30 ° to 60 °.

• Wie eingangs bereits beschrieben, erzeugt die Turbine im Zwischenbehälter einen Unterdruck. Dieser setzt sich über die Saugleitung, über einen (hier abgewinkelten) Rohrabschnitt des zweiten Anschlusspaares 1.2, über einen der Anschlussstutzen des ersten Anschlusspaares 1.1 und über eine Stichleitung bis zu einer in einem Lagerraum für Holzpellets befindlichen Saugsonde fort und führt dazu, dass Holzpellets über diesen Weg angesaugt und zum Zwischenbehälter gefördert werden, vorausgesetzt natürlich, das zweite Anschlusspaar 1.2 befindet sich in der entsprechenden Position vor einem der ersten Anschlusspaare 1.1.

The switching device according to the invention works as follows:

• As already described at the beginning, the turbine generates a negative pressure in the intermediate container. This settles over the suction line, over a (here angled) pipe section of the second connection pair 1.2 , via one of the connection pieces of the first connection pair 1.1 and via a branch line to a suction probe located in a storage room for wood pellets and leads to wood pellets being sucked in via this path and conveyed to the intermediate container, provided, of course, the second pair of connections 1.2 is in the corresponding position in front of one of the first connection pairs 1.1 .

If, for example, there are no more wood pellets available in the area of the suction probe that is currently in operation, a change to another suction probe is required, then the second pair of connections 1.2 with the turbine running along the straight line 3 shifted, it then according to the invention mandatory to one of the bypass lines 2.1 , 2.2 got. In this position, the pneumatic short-circuit ensures that all wood pellets are removed from the suction line. In contrast to the aforementioned prior art, in which the aim is to dissolve existing blockages, according to the solution according to the invention it is thus ensured that such a blockage cannot occur in the first place.

If the "rinsing phase" has now been completed via one of the bypass lines, the wood pellets can be conveyed by moving the second pair of connections 1.2 to the next first connection pair 1.1 and can thus be continued via another suction probe.

A further “rinsing phase” is also carried out if the intermediate container is completely filled during a delivery phase.

List of reference symbols

1

Connection device

1.1

first connection pairs

1.2

second pair of connections

1.3

Through opening

2.1

Bypass line

2.2

further bypass line

3

Straight

Claims (10)

Switching device, comprising a connection device (1) having a plurality of first connection pairs (1.1) and a second connection pair (1.2) which is adjustably mounted on the connection device (1) and can be pneumatically connected to the first connection pairs (1.1), with the connection device (1) for A bypass line (2.1) is provided to enable a pneumatic short circuit on the second pair of connections (1.2), characterized in that in addition to the bypass line (2.1) at least one further bypass line (2.2) is provided and at least one of the bypass lines (2.1, 2.2) is between the first Connection pairs (1.1) is arranged. Switching device according to Claim 1 , characterized in that a bypass line (2.1, 2.2) is arranged next to each first connection pair (1.1). Switching device according to Claim 1 or 2 , characterized in that more than five first connection pairs (1.1) are arranged on the connection device (1). Switching device according to one of the Claims 1 to 3 , characterized in that the connection device (1) is designed as a plate and that the first connection pairs (1.1) and the bypass lines (2.1, 2.2) are arranged on one side of the plate. Switching device according to Claim 4 , characterized in that the plate has through openings (1.3) in the arrangement area of the first connection pairs (1.1) and the bypass lines (2.1, 2.2). Switching device according to Claim 4 or 5 , characterized in that the second pair of connections (1.2) is designed to be longitudinally displaceable on the plate along the through openings (1.3). Switching device according to one of the Claims 1 to 6th , characterized in that the first connection pairs (1.1) are arranged extending along a straight line (3), each first connection pair (1.1) having two connection pieces which are arranged obliquely offset from one another with respect to the straight line (3). Switching device according to one of the Claims 1 to 7th , characterized in that the first connection pairs (1.1) are arranged extending along a straight line (3), each bypass line (2.1, 2.2) having two connecting sections which are arranged obliquely offset with respect to the straight line (3). Method for operating a switching device according to Claim 1 , characterized in that with each change of the second connection pair (1.2) from one to the next first connection pair (1.1) the suction line is emptied via the bypass line (2.1, 2.2). Procedure according to Claim 9 , characterized in that the turbine remains switched on when the second connection pair (1.2) is changed from one connection pair (1.1) to the next.

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