DE102012022836B3 - Hose pump and application system with such - Google Patents

Abstract

In the case of a peristaltic pump with a pump hose (12), at least one squeezing element (24) can be moved cyclically along the pump hose (12) by means of a pump drive (34, 36; 92, 36) during pumping operation of the hose pump (46) so that it is squeezed and a medium in the pump hose (12) is conveyed. The peristaltic pump (46) comprises a synchronization system (48), by means of which the movements and / or the positions of the at least one squeezing element (24) and a pig (40) located in the pump hose (12) can be synchronized in such a way that it can be synchronized when the pump drive is active (34, 36; 92, 36) no positional collision occurs at a collision point (78) between the squeezing element (24) and the pig (40). In addition, an application system for coating objects is specified in which coating material can be conveyed from at least one reservoir (52.1, 52.2) by means of such a hose pump (46) which is arranged in a supply line (58). There is also at least one pig station (66) from which a pig (40) can be delivered into the supply line (58). The pig station (66) is arranged downstream of the hose pump (46).

Description

The invention relates to a peristaltic pump with a pump hose and with at least one movable by means of a pump drive squeezing element which is cyclically movable in the pumping operation of the peristaltic pump along the pump tube, that this is squeezed and located in the pump tube medium.

• a) wenigstens einem Reservoir für Beschichtungsmaterial;
• b) einer Schlauchpumpe, die in einer Versorgungsleitung angeordnet ist und mittels welcher Beschichtungsmaterial aus dem wenigstens einen Reservoir förderbar ist;
• c) wenigstens einer Molchstation, aus welcher ein Molch in die Versorgungsleitung abgebbar ist.

Moreover, the invention relates to an application system for coating objects with

• a) at least one reservoir for coating material;
• b) a hose pump which is arranged in a supply line and by means of which coating material from the at least one reservoir can be conveyed;
• c) at least one pigging station, from which a pig can be discharged into the supply line.

Peristaltic pumps are displacement pumps, in which the medium to be pumped is conveyed through the pump hose by mechanically deforming it from the outside. The external mechanical deformation is usually achieved by moving squeezing elements, such as squeezing rollers, squeezing rollers or sliding shoes, press the pump hose against a hose bed or a counter element and clamp locally. By moving the squeezing elements and thus the Abklemmstellen along the pump hose, the medium to be pumped is driven in the pump hose.

Depending on the form of movement of the crimping elements, a distinction can be made between linear peristaltic pumps and radial or rotary peristaltic pumps.

Peristaltic pumps offer a simple structure without valves and allow a uniform and gentle conveyance even of sensitive material, whereby even small flow rates can be precisely dosed. Not least because of their low maintenance costs, there are many fields of application for peristaltic pumps.

A known from the market tube pump according to the prior art is in 1 illustrated schematically and in total with 10 designated. The hose pump 10 includes a pump hose 12 holding a suction hose 14 with a delivery hose 16 connects and in a pump room 18 in a tube bed 20 runs while a circular arc 22 follows. The hose pump 10 further comprises a plurality of crimping elements 24 , In pumping mode of peristaltic pump 10 become these squeezing elements 24 cyclically so along the pump hose 12 moved that squeezed and one in the pump hose 12 is promoted medium. The above, by the squeezing 24 caused Abklemmstellen along the pump tube 12 are with 26 designated. Between two of these wandering Abklemmstellen 26 which are immediately adjacent, is each a delivery volume 28 educated. In the 1 hose pump shown 10 is as a rotary tube pump 30 educated. Their squeezing elements 24 are pinch rollers 32 and from a rotor 34 carried, which by means of a drive motor 36 around a rotation axis 38 can be twisted. The rotor 34 and the drive motor 36 thus form a pump drive.

In addition to diaphragm or piston pumps, peristaltic pumps are also used, for example, in application systems in the coating of objects, in order to convey coating materials, on account of the above-mentioned advantages. The coating materials are, in particular, paints which can be obtained from the hose pump from a paint reservoir to one or more application devices known per se, such as, for example, B. Hochrotationszerstäubern or spray guns promoted.

In paint shops, it regularly happens that for the coating of an object, a different paint is to be used as the paint with which a previous object has been coated, for which a color change must be performed. Before a color change, the lines leading to the application device and the supply system for the paint must be rinsed and freed from paint residues of the first paint. This leads to paint losses. In order to keep these as low as possible, so-called pigging technology has been established, in which paint and detergent can be kept separate from each other by means of pigs, which act as cleaning bodies. The use of a pig and its position detection is for example in the US 5 882 428 A described. A pig is sealingly against the inner surface of a hose or a rigid line and is using a thrust medium, which may be, for example, compressed air or a liquid detergent, between two pig stations at opposite end portions of the line to be cleaned out - and moved. In this case, the paint located in the line can be recovered by this is pushed by the pig out of the line in a reservoir, possibly back into the paint reservoir.

For pumps other than peristaltic pumps, however, the paint contained therein can not be pumped out of the pump by means of a pig and be recovered in this way. Rather, the pumps must be rinsed with a cleaning liquid, whereby the paint is lost in the pump. The pigging technique can be used only for areas of the supply lines that are downstream or upstream of the pump, but not for the pump itself. In the usual pumps, this is basically the internal structure of the pump, as no pig can be passed through it.

In the case of peristaltic pumps, the pump hose filled with paint can in principle be cleaned with a pig. However, there is a risk that a collision of a squeezing element of the peristaltic pump with the pig will occur. This is also in 1 illustrates in which a pig 40 can be seen. The main conveying direction of the peristaltic pump 30 is by an arrow 42 characterized. At a rotation of the rotor 34 in the other direction promotes the peristaltic pump 10 according to the main direction of conveyance 42 opposite direction and the directional relationships are reversed. In the following, it is assumed in principle that the described peristaltic pumps in the main conveying direction 42 operate.

If the main conveying direction 42 the direction of movement of the pig 40 in the pump hose 12 corresponds and this now to the pump room 18 it can happen that the newt 40 inside the pump hose 12 the trajectory of a squeezing element 24 when this crosses during the rotation of the rotor 34 on the pump hose 12 impinges and squeezes or compress the pump hose. This results in a position collision between the pig 40 and the squeezing element 24 in which the pig 40 located in the position at which actually a Abklemmsteile 26 should be generated. As between the newt 40 and the squeezing element 24 always the hose jacket of the pump hose 12 In the present case, a collision does not mean a direct, touching meeting of the components involved, which is to be clarified by the term position collision.

This danger is at one of the DE 10 2008 040 082 A1 known rotary hose pump, for example, eliminates the fact that the rotor with the squeezing in a cleaning position of the hose pump is lifted as it were from the pump hose, so that it is no longer clamped at any point or in contact with a squeezing. The pump hose can then be safely passed by the pig, so that also the existing paint in the pump hose can be recovered and the pump hose can be cleaned.

However, the peristaltic pump can no longer work as a conveyor and the pig must be completely driven by an external thrust medium through the hose.

In paint shops, however, the medium-carrying lines between the feed pump and the application device can be quite between 50 m and 100 m long and the distance between the two pig stations is correspondingly large. So that the pig can be driven through the hose over this length, it must be acted upon by the thrust medium with a pressure in the order of 10 bar usually to ensure even at the end of the tube web still a sufficiently high pressure through which the pig is driven against the paint in the line.

At such high pressures, on the one hand, the load on the pig is basically relatively large. On the other hand, a pig usually consists of an elastomeric material, so that it may happen in the worst case that the thrust medium is pushed past the side of the pig and passes to the paint on the other side of the pig. In particular, if the push medium is a cleaning fluid, the so contaminated paint can not be recycled and must be disposed of.

It is an object of the invention to provide a peristaltic pump and an application system, which take into account this idea.

• a) die Schlauchpumpe ein Synchronisationssystem umfasst, durch welches die Bewegungen und/oder die Positionen des wenigstens einen Quetschelements und eines sich im Pumpenschlauch befindlichen Molches derart synchronisierbar sind, dass es bei aktivem Pumpenantrieb zu keiner Positionskollision an einer Kollisionsstelle zwischen dem Quetschelement und dem Molch kommt;
• b) das Synchronisationssystem Mittel umfasst, mit deren Hilfe die Bewegung des wenigstens einen Quetschelements bei aktivem Pumpenantrieb verzögerbar oder beschleunigbar ist, bevor das Quetschelement zur Kollisionsstelle gelangt; und/oder
• c) das Synchronisationssystem eine Einrichtung umfasst, mittels welcher die Bewegung des Molches bei aktivem Pumpenantrieb verzögerbar oder beschleunigbar ist, bevor der Molch zur Kollisionsstelle gelangt.

This object is achieved in a peristaltic pump of the type mentioned in that

• a) the peristaltic pump comprises a synchronization system, by which the movements and / or the positions of the at least one squeezing element and a pig located in the pump tube are synchronized such that it comes with active pump drive to no position collision at a collision point between the squeezing and the pig ;
• b) the synchronization system comprises means by means of which the movement of the at least one squeezing element can be delayed or accelerated when the pump drive is active, before the squeezing element reaches the collision point; and or
• c) the synchronization system comprises a device by means of which the movement of the pig with active pump drive is delayed or accelerated before the pig comes to the collision point.

Through the synchronization system, it is possible that a pig can be used not only for cleaning supply lines, but also for cleaning the peristaltic pump, and the peristaltic pump can continue to work as a conveyor. Therefore, the pig can be promoted in the ideal case without additional pressurization by the thrust medium solely by the conveying action of the peristaltic pump both through the pump hose and through the supply line, in which the peristaltic pump is arranged. Supportive pressurization by the thrust medium can be helpful and under certain circumstances also necessary, but is then sufficient in the order of 6 bar. Thus, the affected lines are exposed to a supportive thrust medium for the pig conveying a lower load than is possible without the lasting effect of the peristaltic pump.

In addition, a pump hose of peristaltic pumps takes up to 350 ml of coating material, which is usually lost when cleaning with a detergent. This coating material can now be recovered, since a pig can be guided through the pump hose.

The squeezing element is preferably delayed, d. H. that is, stopped or at least slowed down as it moves toward the collision point while the newt can continue to move to the collision location and pass. In this period, the pig is preferably driven by a thrust medium in the pump hose. When accelerating the movement of the squeezing this then hits the colliery in front of the pig, which also prevents a position collision.

As an alternative or in addition with regard to the countermeasures to prevent a positional collision between the squeezing element and the pig, it is not the movement of the squeezing element that is affected but the movement of the pig. Here are the movement of the pig in the pump hose on the one hand and the movement of the pig in the room in general of interest.

• a) das Ausgangssignal von wenigstens einem Molchsensor erhält, welcher derart angeordnet ist, dass ein Molch im Pumpenschlauch erfassbar ist, bevor dieser die Kollisionsstelle erreicht;
• b) ein Ausgangssignal einer Stellungssensorik erhält, welches die Position des wenigstens einen Quetschelements widerspiegelt.

It is particularly advantageous if the synchronization system comprises a synchronization control, which

• a) receives the output signal from at least one pig sensor, which is arranged such that a pig in the pump tube is detected before it reaches the collision point;
• b) receives an output signal of a position sensor, which reflects the position of the at least one squeezing element.

In this way, the position data of the pinch element (s) and a pig to be moved to the possible collision point can be correlated and, in the event of a risk of collision, countermeasures can be taken to prevent a position collision. The position sensor is preferably formed by the fact that the pump drive transmits an actuating signal to the synchronization control, which can therefrom determine the position of one or more pinch elements, which are guided by the pump drive.

In order that the movement of the squeezing element can be delayed or accelerated while the pump drive is running, it is favorable if the at least one squeeze element is movably mounted on a rotor between a standard position and an escape position.

In addition, the squeezing element can assume its standard position under prestress.

It is favorable if an adjusting device is provided, by means of which the squeezing element can be pivoted from its standard position into its escape position when the pump drive is active. This can be done for example by motor.

An advantageous solution is when the squeezing element is fastened by means of a bearing web between the standard position and the alternate position pivotally mounted on the rotor.

Particularly in this case, the adjusting device can advantageously be designed as a retractable and extendable locking pin, which is arranged in a movement section of the bearing web adjacent to and in front of the collision point. The extended locking pin can then hold back the squeezing element so that the pig can pass the point of collision without hitting the squeezing element.

The above measures can be implemented particularly well in a rotary tube pump, but are also readily suitable for a linear tube pump.

With regard to the pig, the device may be arranged such that the pump hose is displaceable counter to or with the direction of movement of the pig, which has this in the pump hose. If the pump hose is displaced against the direction of movement of the pig in the pump hose, the pig moves accordingly slower in the direction of the collision point. In contrast, when the pump hose is displaced with the direction of movement of the pig in the pump hose, the pig moves accordingly faster towards the collision point.

It is advantageous for this purpose if the pump hose is guided downstream and upstream of the collision point in a respective compensation loop via two outer stationary deflection rollers and one middle movable deflection roller each.

A uniform displacement of the pump hose can be achieved when the movable guide rollers are coupled together via a rigid rocker member whose wiping position is adjustable by means of a drive.

The above measures to influence the movement of the pig can be implemented particularly well in a linear tube pump, but can also be used without difficulty in rotary tube pumps.

• d) die Molchstation stromab der Schlauchpumpe angeordnet ist;
• e) die Schlauchpumpe nach einem der Ansprüche 1 bis 11 ausgebildet ist.

The above object is achieved in the application system of the type mentioned above in that

• d) the pig station is located downstream of the peristaltic pump;
• e) the hose pump according to one of claims 1 to 11 is formed.

Thus, a pig can also be guided through the peristaltic pump and clean both the supply line and the peristaltic pump. Again, it is particularly advantageous that the peristaltic pump can also be used during the cleaning process as funding.

It is advantageous if a further pig station upstream of the peristaltic pump is arranged. In this case, the peristaltic pump can be acted upon by a pig from both sides, so that coating material in the supply line can also be pressed out of the line against the conveying direction.

Embodiments of the invention will be explained in more detail with reference to the drawings. In these show:

1 schematically a rotary tube pump according to the prior art with a pump hose and four crimping elements, wherein a collision constellation of one of the squeezing and a pump hose located in the pig is illustrated, which can occur when the pump hose to be cleaned with an active peristaltic pump with a pig;

2 a schematic layout of an application system with a hose pump according to the invention comprising a synchronization system by which the movements and positions of squeezing and a pig can be synchronized so that a position collision is prevented;

3 to 5 a plurality of synchronization phases in a schematically illustrated rotary tube pump comprising such a synchronization system according to a first embodiment;

6 schematically a first variant of a linear tube pump;

7 schematically a second variant of a linear tube pump;

8th schematically a second embodiment of a synchronization system in interaction with the linear tube pumps of 6 or 7 ,

In 2 is now the layout of a total with 44 designated application system for coating objects, in which a peristaltic pump 46 is used, which is a synchronization system 48 includes whose task has been explained above. Details of the hose pump 46 and the synchronization system 48 will be below with reference to the 3 to 8th described.

The application system 44 includes a depot 50 for coating material containing several reservoirs filled with coating materials 52 includes. In 2 are exemplary two color supplies 52.1 and 52.2 shown filled with a first color and a second color respectively. Colors are here only as an example of coating materials, but instead adhesives, protective materials or the like can be applied to the objects.

The color reservoir 52 , whose color is to be applied to a non-specifically shown item, is with a connection cover 54 covered, which has an intake 56 which leads to the color in the paint reservoir 52 protrudes into it when the connection cover 54 on the paint reservoir 52 is arranged.

If a color change is to be made, the connection cover becomes 54 from the respective color reservoir 52 removed and after cleaning the immersing in the color components, in particular the intake 56 , on another color reservoir 52 put on and fastened there.

The intake manifold 56 is via a trained as a circulation hose supply line 58 with a return pipe 60 of the lid 54 connected above the color mirror in the color reservoir 52 ends when the connection cover 54 on a paint reservoir 52 is appropriate.

From the supply line 58 go several supply lines 62 with valves 64 which in each case leads to a non-specifically shown application device, for example a high-rotation atomizer or a spray gun, as they are known per se.

The hose pump 46 is in the supply line 58 between the supply lines 62 and the connection cover 54 arranged. Downstream of the peristaltic pump 46 ie between the ink reservoir 52 and peristaltic pump 46 and specifically in the present embodiment between the connection cover 54 and the peristaltic pump 46 , there is a first pig station 66 with a compressed air line 66a , a supply line 66b for a cleaning liquid and a discharge line 66c , At the end of the supply line 58 in front of the connection cover 54 is a second pig station 68 arranged, which in turn via a compressed air line 68a and a supply line 68b for a cleaning fluid can be fed and also a discharge line 68c includes. The respective compressed air and cleaning agent sources for the pig stations 66 . 68 are shown for simplicity as little as any collection container for the discharge lines 66c . 68c , The pigging stations 66 and 68 are also otherwise formed in a manner known per se, which is why a more detailed explanation is not necessary.

The implementation of a color change and the cleaning of the supply lines, ie in the present embodiment, in particular the supply line 58 , is known in and of itself and therefore need not be further described.

In the present case, however, it is important that the first pig station 66 downstream and not upstream of the peristaltic pump 46 is arranged, as is customary in the prior art. The newt can due to the synchronization system 48 also through the peristaltic pump 46 be guided and clean it.

In the 3 to 5 is now a first embodiment of a peristaltic pump 46 with synchronization system 48 shown. The hose pump 46 is there as a rotary hose pump 70 formed, in which components that those of the above-explained rotary tube pump 30 correspond, bear the same reference numerals and will not be explained again specifically.

With regard to the synchronization of the movements and / or positions of a pig 40 and a squeezing element 24 are the squeezing elements 24 there so movable on the rotor 34 stored so that they can be moved between a standard position and an evasive position.

In the present embodiment, two squeeze elements 24 in the form of two squeezing rollers 32 present, each for this purpose at one end of a storage bridge 72 are held. Every jetty 72 is in turn at the opposite end pivotable about a pivot axis with the rotor 34 coupled, parallel to the axis of rotation 38 of the rotor 34 runs. The rotor 34 carries the bearing bars 72 while on radially opposite sides.

In their standard position, the squeezing rollers run 32 ahead of a reference axis 74 perpendicular to the axis of rotation of the rotor 34 and through the pivot axis of a bearing bar 72 on the rotor 34 leads when the rotor 34 in his main direction of rotation 42 rotates. This reference axis 74 is only in 3 shown. In the evasive position, the squeezing rollers run 32 relative to the reference axis 74 and upon a corresponding rotation of the rotor 34 to. This will be the squeeze rolls 32 by a spring 76 held under bias in their default position.

The possible collision point in the pump hose 12 the rotary hose pump 70 where a newt 40 and a squeezing roll 32 can collide is in 3 With 78 designated. Relative to the main conveying direction 42 the rotary hose pump 70 are downstream of the collision point 78 a first pig sensor 80 and upstream of the collision site 78 a second pig sensor 82 arranged, with whose help a newt 40 in the pump hose 12 can be detected. Such pig sensors may be formed, for example, as known per se Hall sensors, including the pig 40 also carries a permanent magnet in a known manner. The detection of pigs, even using other sensor techniques, is mature and need not be explained here.

The pigging sensors 80 . 82 transmit their output signal to a synchronization controller 84 , This also receives an output signal of a position sensor, which detects the position of the squeezing 24 reflects. In the present embodiment, the drive motor transfers for this purpose 36 of the rotor 34 an actuating signal to the synchronization control 84 , from which the rotor position of the rotor 34 and thus the position of the pinch rollers 32 can derive. Other known sensor techniques can be used for this purpose.

In a movement section of the bearing webs 72 which is adjacent to the location where the respective squeezing roller 32 on the pump hose 12 meets, is as adjusting device for the squeezing roller 32 a locking pin 86 arranged, which is axially parallel to the axis of rotation of the rotor 34 can be retracted or extended between a release position and a locked position. The locking pin 86 is through the synchronization control 84 driven. The locking pin 86 For example, it may be electromagnetically actuated.

In the release position of the locking pin 86 can the jambs 72 with the associated squeezing roller 32 pass unhindered. When the locking pin 86 on the other hand assumes its blocking position, a jetty bumps 72 during the rotation of the rotor 34 against the locking pin 86 and is held back by this, with the storage bridge 72 against the spring force of the spring 76 moved from its default position towards its evasive position. This synchronization phase is in 4 illustrated. With the help of the locking bolt 86 This will be the movement of the squeezing roller 32 to the pump hose 12 delayed before the squeezing roll 32 on the pump hose 12 meets. The drive motor 36 and thus the pump drive 30 . 36 remains activated.

The rotary hose pump 70 with the synchronization system 48 works like this:
When the supply line 58 with the rotary tube pump 70 to be cleaned for a color change, is from the first pig station 66 a newt 40 started, which is still in the supply line 58 and the pump hose 12 to push out the existing paint. The supply line 58 if necessary via the pig station 66 downstream of the pig 40 Detergents are supplied.

If the newt 40 to the first pig sensor 80 in the pump hose 12 this is detected and the synchronization control 84 transmitted as an output signal. The rotary hose pump 70 will continue to operate, with the capacity and thus the propulsion of medium and newt 40 in the pump hose 12 is known.

The synchronization control 84 now analyzes the position of the rotor 34 , If this one takes a rotational position, as is the in 3 shown synchronization phase, in which the further advance of medium and pig 40 in the pump hose 12 and the further rotation of the rotor 34 without countermeasure to a position collision between the pig 40 and a squeezing roll 32 at the collision point 78 would lead to synchronous control 84 the locking pin 86 , This then holds the jetty 72 back in the manner described above.

The rotor 34 moves on thereby, whereby the pumping action of the rotary tube pump 70 through the squeezing roll 32 is maintained on the opposite rotor side. The newt 40 therefore moves in the conveying direction 42 through the pump hose 12 and then passes to the second pig sensor 82 , The synchronization control 84 recognizes by the output signal of the second pig sensor 82 that the newt 40 the collision site 78 has happened and disables the locking pin 76 who then takes his release position.

The jetty 72 moves through the spring 76 towards his standard position, which he can not take because of the rotor 34 has moved in the meantime and the squeeze roll 32 so early on the pump hose 12 meets that the jetty 72 again against the spring 76 forced into his evasive position. This synchronization phase is in 5 illustrated. The squeezing roll 32 so now meets downstream of the pig 40 on the pump hose 12 so that the newt 40 in the delivery volume 28 between the two squeezing rollers 32 is included.

Upon further rotation of the rotor 34 remains the jetty 72 in his evasive position; the delivery volume 28 between the two squeezing rollers 32 is therefore slightly larger compared to the standard configuration of the rotary tube pump 70 in which both jetties 72 with the squeezing rollers 32 take their standard position.

When the squeezing roll 32 at the footbridge 72 in the evasive position in the further rotation of the rotor 34 finally from the pump hose 12 is released, moves the now freely movable bearing bar 72 the squeezing roll 32 through the spring 76 back to the standard position, in which the bearing bar 72 and the associated squeezing roller 32 at the next circulation again on the pump hose 12 if not again a synchronization of a pig 40 and a squeezing roll 32 is required.

When cleaning the supply line 58 and the rotary tube pump 70 their pumping or conveying effect is fully retained. The newt 40 and the cleaning medium are using the rotary tube pump 70 through the supply line 58 to the second pig station 68 promoted, being in the supply line 58 Lack located on the return pipe 60 on the connection cover 54 into the paint reservoir 52 can be returned and thus regained.

When cleaning the supply line 58 and the rotary tube pump 70 can in usual Also, a detergent package between two pigs 40 through the pump hose 12 and the supply line 58 be guided. When in the conveying direction 42 trailing newt 40 If necessary, a synchronization process is carried out in the same way as explained above.

The newt 40 , or two pigs 40 in the conveying direction 42 trailing newt 40 , can be acted upon with a thrust medium, in particular with compressed air, to the propulsion of the pig 40 in the pump hose 12 and the supply line 58 to support. As the pumping and conveying effect of the rotary tube pump 70 also with existing pig 40 is maintained, but this is a lower pressure required than without functioning rotary tube pump 70 , The supporting thrust medium is used here largely to avoid that a pig 40 by friction on the tube inner wall stops.

For lines with a length of 50 m to 100 m, as mentioned at the beginning, more moderate pressures of at most 6 bar are sufficient for this purpose.

When the rotary tube pump 70 also contrary to the main direction of promotion 42 with the help of a pig 40 are to be cleaned, are pig sensors 80 . 82 and a locking pin 86 also on the outlet side of the pump hose 12 available. The synchronization of newts 40 and squeezing roll 32 then takes place in the other direction in the manner described above.

In 6 is now a peristaltic pump 46 shown which as a linear tube pump 88 is trained. Already explained and functionally corresponding components bear the same reference numerals as in the rotary tube pump 70 in the 3 to 5 ,

The pump hose 12 follows here in the pump room 18 no circular arc, but runs straight. The linear hose pump 88 includes two on opposite sides of the pump hose 12 arranged circulating units 90 , which each have an endless circulation belt 92 each of which by means of a respective drive motor 36 is driven and regularly spaced and radially outwardly projecting bearing struts 94 with it, which at its free end in each case a squeezing element 24 in the form of a squeezing roll 32 wear. If necessary, can also for both circulation units 90 a common drive can be provided. At each circulation unit 90 are only one bearing strut 94 and a squeezing element 24 or a squeezing roll 32 provided with reference numerals. In this embodiment, the two form endless circulation belts 92 together with the two drive motors 36 the pump drive.

The two circulation units 90 form a sponsored couple 96 and are coordinated so that each two coming from both sides squeezing rollers 32 a pinch point 26 on the pump hose 12 generate and a squeeze pair 98 form as it is in 6 can be seen. The squeeze rolls 32 a squeeze couple 98 can be synchronous along the pump hose 12 move so that the between the squeezing rollers 32 formed Abklemmstelle 26 is maintained.

A respective delivery volume 28 There is therefore between the Abklemmstellen 26 two adjacent pinch pairs 96 locked in. In 6 is in the funding volume 28 also a newt 40 shown by the linear tube pump 88 is promoted through.

7 shows a modification of a linear tube pump 100 , in which two funding pairs 96 are present in the main conveying direction 42 offset from one another and arranged rotated by 90 ° and with 96.1 respectively. 96.2 are designated. The funding pairs 96.1 and 96.2 are in 7 only strongly indicated schematically. A delivery volume 28 is there between each squeeze pair 98 of the sponsored couple 96.1 and a squish pair adjacent thereto 98 of the sponsored couple 96.2 limited. In this embodiment of a linear hose pump, the mechanical load on the pump hose 12 by its deformation more uniform than in the case in which squeeze rolls 32 only from two opposite sides to the pump hose 12 attack.

For the linear hose pumps 88 and 100 is only the pig sensor 80 downstream of the collision point 78 present, which is its output to the synchronization control 84 passes. The position of the pinch rollers 32 the pinch pairs 98 will be back from the synchronization control 84 from actuating signals of the drive motors 36 of the circulation units 90 determined.

The synchronization of the movements of a pig 40 and the squeeze rolls 32 the sponsored couples 96 respectively. 96.1 . 96.2 the linear tube pumps 88 respectively. 100 takes place in that the movement of the pig 40 on the collision point 78 being affected.

This is based on 8th the example of the linear tube pump 88 with the sponsored couple 96 explained, of which only two pairs of squeezing 98 are shown. For the linear tube pump 100 with the two conveyor pairs 96.1 . 96.2 the statement applies mutatis mutandis accordingly.

The synchronization system 48 includes a facility here 102 by means of which the movement of the pig 40 with active pump drive 34 . 36 is retardable or acceleratable before the newt 40 to the collision point 78 arrives. For the linear hose pumps 88 and 100 the device aims 102 on the delay of the pig movement.

In the present embodiment, this device 102 set up such that the pump hose 12 opposite or with the direction of movement 42 of the newts 40 in the longitudinal direction of the pump hose 12 is displaceable. Thus, the movement of the pig 40 changed in the room, without its movement in the pump hose 12 being affected. For this purpose, the pump hose 12 downstream and upstream of the collision point 78 , in the present case downstream and upstream of the conveyor pair 96 , in a respective compensation loop 104a respectively. 104b via two outer stationary pulleys 106a . 106b respectively. 108a . 108b and in each case a middle movable deflection roller 106c respectively. 108c guided. The movable pulleys 106c respectively. 108c can in a direction perpendicular to the axis of rotation and each of the stationary pulleys 106a . 106b respectively. 108a . 108b be moved away.

The movable pulleys 106c . 108c are about a rigid rocker member 110 connected to each other, whose wiping position by means of a drive 112 can be adjusted, in turn, by the synchronization control 84 is controlled.

Through the rocker member 110 and a corresponding movement of the movable pulleys 106c . 108c can the respective compensation loops 104a . 104b be shortened or extended in opposite directions, causing the pump hose 12 between the two compensation loops 104a . 104b in the main conveying direction 42 or moved in reverse.

The linear hose pumps 88 . 100 with this synchronization system 48 Now work as follows, taking the position of the pig 40 in the 8A and 8B is illustrated with an arrow:
In an in 8A output configuration shown is the compensation loop 104a downstream of the conveyor pair 96 shorter than the compensation loop 104b upstream of the conveyor pair 96 related to the main conveying direction 42 , The movable pulley 106c is closer to the pulleys 106a . 106b as the movable pulley 108c at the pulleys 108a . 108b ,

Now if the pig sensor 80 a newt 40 detected and the synchronization control 84 based on the actuating signal of the drive motors 36 of the sponsored couple 96 recognizes that a collision threatens controls the synchronization control 84 the drive 112 such that the rocker member 110 the movable pulleys 106c and 108c moves in opposite directions and the compensation loop 104a extended and the compensation loop 104b is shortened.

The pump hose moves 12 against the main conveying direction 42 and leads the pig 40 with himself. This increases the distance of the pig 40 to the adjacent squeezing rollers 32 of the sponsored couple 96 , which in the meantime, in addition, a little further in the main direction of conveyance 42 have moved.

The newt 40 moves through the compressed air or the cleaning medium in the pump hose 12 Ahead. If the pump hose 12 at the same speed against the main conveying direction 42 moves, with which the pig 40 in the pump hose 12 moved forward, the pig remains 40 in a stationary position. The pump hose 12 is thereby about the pig as it were 40 pushed away. Deviating from this ideal case, the pig remains 40 but at least in a stationary waiting area 114 moving in mainstream direction 42 in front of the collision area 78 located.

By the thus obtained delay the pig movement, the pig 40 thereafter safely into a delivery volume 28 run in and is from the linear tube pump 88 promoted, as it also above the rotary tube pump 70 was explained.

After the newt 40 the linear hose pump 88 has happened, the output configuration by a corresponding return movement of the rocker member 110 restored.

If the linear tube pump 88 in the other direction of a newt 40 is to be run through, an initial configuration is prepared before, the arrangement in 8B equivalent. Such is the motion synchronization of a pig explained above 40 and the squeeze rolls 32 of the sponsored couple 96 in the main direction of conveyance 42 opposite direction possible. In this case, a pigging sensor system must also be present on the original output side.

Alternatively or additionally, the device 102 also with the rotary hose pump 70 be provided. Here also an acceleration of the pig movement come to fruition, so that the newt 40 the collision site 78 reached faster and before the squeezing element 24 happens.

Claims (13)

Hose pump with a pump hose ( 12 ) and at least one by means of a pump drive ( 34 . 36 ; 92 . 36 ) movable crimping element ( 24 ), which in pumping operation of the peristaltic pump ( 46 ) cyclically along the pump tube ( 12 ) is movable, that squeezed and one in the pump hose ( 12 ) is conveyed, characterized in that a) the peristaltic pump ( 46 ) a synchronization system ( 48 ), by which the movements and / or the positions of the at least one crimping element ( 24 ) and one in the pump hose ( 12 ) ( 40 ) are synchronized in such a way that, when the pump drive is active ( 34 . 36 ; 92 . 36 ) to no position collision at a collision location ( 78 ) between the crimping element ( 24 ) and the newt ( 40 ) comes; b) the synchronization system ( 48 ) Comprises means by means of which the movement of the at least one crimping element ( 24 ) with active pump drive ( 34 . 36 ; 92 . 36 ) can be delayed or accelerated before the crimping element ( 24 ) to the collision point ( 78 ); and / or c) the synchronization system ( 48 ) An institution ( 102 ) by means of which the movement of the pig ( 40 ) with active pump drive ( 34 . 36 ; 92 . 36 ) can be delayed or accelerated before the pig ( 40 ) to the collision point ( 78 ). Peristaltic pump according to claim 1, characterized in that the synchronization system ( 48 ) a synchronization control ( 84 ), which a) the output signal of at least one pig sensor ( 80 ), which is arranged such that a pig ( 40 ) in the pump hose ( 12 ) is detectable before this collision point ( 78 ) reached; b) receives an output signal of a position sensor, which detects the position of the at least one crimping element ( 24 ). Peristaltic pump according to claim 1 or 2, characterized in that the at least one crimping element ( 24 ) between a standard position and an evasive position movable on a rotor ( 34 ) is stored. Peristaltic pump according to claim 3, characterized in that the at least one crimping element ( 24 ) assumes its default position under bias. Peristaltic pump according to claim 3 or 4, characterized in that an adjusting device is provided, through which the squeezing ( 24 ) with active pump drive ( 30 . 36 ; 92 . 36 ) is pivotable from its standard position in its evasive position. Hose pump according to one of claims 3 to 5, characterized in that the at least one crimping element ( 24 ) by means of a bearing bar ( 72 ) pivotable between the standard position and the avoidance position on the rotor ( 34 ) is attached. Peristaltic pump according to claim 6 with reference to claim 5, characterized in that the adjusting device as a retractable and extendable locking pin ( 86 ) is formed in a moving portion of the bearing web ( 72 ) adjacent to and in front of the collision point ( 78 ) is arranged. Peristaltic pump according to one of claims 1 to 7, characterized in that the device ( 102 ) is arranged such that the pump hose ( 12 ) against or with the direction of movement ( 42 ) of the newt ( 40 ), this in the pump hose ( 12 ), is displaceable. Hose pump according to one of claims 1 to 8, characterized in that the pump hose ( 12 ) downstream and upstream of the collision site ( 78 ) in a respective compensation loop ( 104a . 104b ) via two outer stationary pulleys ( 106a . 106b . 108a . 108b ) and in each case a middle movable deflection roller ( 106c . 108c ) is guided. Peristaltic pump according to claim 9, characterized in that the movable deflection rollers ( 106c . 108c ) via a rigid rocker member ( 110 ) are coupled to each other, whose Wipplage by means of a drive ( 112 ) is adjustable. Hose pump according to one of claims 1 to 10, characterized in that the peristaltic pump ( 46 ) is a rotary tube pump or a linear tube pump. Application system for coating articles with a) at least one reservoir ( 52.1 . 52.2 ) for coating material; b) a peristaltic pump ( 46 ) in a supply line ( 58 ) is arranged and by means of which coating material from the at least one reservoir ( 52.1 . 52.2 ) is eligible; c) at least one pigging station ( 66 ), from which a newt ( 40 ) into the supply line ( 58 ), characterized in that d) the pig station ( 66 ) downstream of the peristaltic pump ( 46 ) is arranged; e) the peristaltic pump ( 46 ) is designed according to one of claims 1 to 11. Application system according to claim 12, characterized in that the one further pig station ( 68 ) upstream of the hose pump ( 46 ) is arranged.

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