EP4012176A1 - Delivery device for thick substance - Google Patents

Abstract

The invention relates to a thick matter conveying device, in particular for conveying concrete, which comprises two conveying cylinders, by means of which thick matter can be conveyed from a thick matter collecting container into a conveying line. The delivery cylinders can be driven in such a way that one of the delivery cylinders executes a pumping stroke while the other delivery cylinder executes a suction stroke at the same time. A diverter tube connected to the delivery line is pivotably mounted on the thick matter collection container and can be driven via a shaft rotatably mounted in a front bearing in such a way that it alternately connects the delivery line to the delivery cylinder performing a pump stroke in each case. According to the invention, the shaft is mounted in the front bearing via two bearing points and can be separated from the transfer tube. The invention also relates to a method for dismantling the diverter valve of such a thick matter conveying device.

Description

The present invention relates to a thick matter conveying device, in particular a concrete pump, according to the preamble of claim 1.

Special high-density pumps are usually used to convey high-density materials such as concrete, which pump the high-density material from a collection container (e.g. a feed hopper) into a delivery line by means of hydraulically driven delivery cylinders. In such pumps, the delivery cylinders have an opening at one end for this purpose, which is connected to a corresponding suction opening in the housing of the collection container in order to be able to suck in the thick matter from it and then pump it into the delivery line.

As a rule, such thick matter conveying devices are operated as two-cylinder pumps with two conveying cylinders working in push-pull. A diverter tube, usually designed as an S-tube, is pivoted inside the thick matter collection tank, which is permanently connected at one end to the delivery line and can rotate relative to it and is pivoted back and forth by a typically hydraulic drive in such a way that the other opening of the diverter tube alternately both intake openings covered. are there the drives of the delivery cylinder and the diverter tube are coordinated in such a way that the diverter tube is always connected to the delivery cylinder that is currently executing a pump stroke, so that this thick matter pumps into the delivery line, while the other delivery cylinder that is executing a suction stroke draws in thick matter from the interior of the thick matter collection tank.

The transfer tube, which is a wearing part and therefore has to be serviced or replaced regularly, is usually rotatably mounted via a rigidly connected shaft in a front bearing on a front wall of the thick matter collection container, on which the suction openings for the delivery cylinders are located. As a drive for the rotational movement of the shaft or diverter valve, a pivoting drive is attached to the housing of the thick matter collection container, typically in the form of two hydraulic pivoting cylinders which are connected to a pivoting lever which is mounted or formed on the shaft. In the area of the front bearing, the forces of the swivel drive are transmitted via the swivel lever as torque to the diverter tube and the loads of the diverter tube from pump operation are also absorbed by the bearing. A second, rear bearing is normally located at the rear of the sludge collection tank in the area of the delivery line and allows the diverter tube to rotate relative to it.

Known solutions usually include a construction with a comparatively thick and heavy base plate as the front wall (or as part of the front wall) of the sludge collector and receiving the diverter drive, a one-piece front diverter bearing and a diverter with an integrated shaft. Such constructions are heavy due to the massive construction. In addition, the assembly and disassembly of such a diverter tube is made more difficult, since the point of separation between the diverter tube and the pivoting lever is outside the housing of the thick matter collection container. The rear bearing must therefore be dismantled so that the shaft can be pulled out of the front bearing. This represents a decisive disadvantage when assembling or disassembling the heavy and regularly wearing diverter valve.

The object of the present invention is therefore to enable simpler assembly and disassembly of the transfer tube and to improve its storage.

According to the invention, this object is achieved by a thick matter conveying device having the features of claim 1 . Accordingly, a thick matter conveying device is proposed, in particular for conveying concrete, which comprises two conveying cylinders, by means of which thick matter can be conveyed from a thick matter collecting container into a conveying line. The delivery cylinders can be driven in such a way that one of the delivery cylinders executes a pumping stroke while the other delivery cylinder executes a suction stroke at the same time. A diverter tube connected to the delivery line is pivotably mounted on the thick matter collection container and can be driven via a shaft rotatably mounted in a front bearing in such a way that it alternately connects the delivery line to the delivery cylinder performing a pump stroke in each case.

According to the invention, the shaft is mounted in the front bearing via at least two bearing points and can be separated from the transfer tube. The bearing points are in particular spaced apart axially.

Due to the double bearing of the shaft in the front bearing, the load occurring during the conveying operation can be absorbed much better by the slide system or thick matter collection container than with a one-piece bearing, since the load is divided between two bearing points. The transfer tube does not have an integrated shaft, but can be separated from it and thus removed from the thick matter collection tank without a shaft. The point of separation between the shaft and the diverter tube or between the diverter tube and the swiveling lever is located within the thick matter collection tank.

This eliminates the typical, cumbersome task of unthreading the heavy component from the front bearing. Overall, the result is a significantly simplified assembly and disassembly of the transfer tube as well as better storage and load absorption. Of course, it is also conceivable that the front bearing has more than two separate bearing points.

Advantageous embodiments of the invention result from the dependent claims and the following description.

In one embodiment it is provided that the shaft has a pivoting lever, via which it can be driven in rotation, the pivoting lever preferably being arranged between the two bearing points. With this arrangement, the load is optimally distributed over the two bearing points. The pivoting lever preferably protrudes from the shaft on one side and serves in particular to connect one or more pivoting cylinders. Shaft and pivoting lever can in principle be two parts, but preferably form a unit.

In a further embodiment it is provided that the pivoting lever is firmly connected, in particular in one piece, to the shaft. The shaft thus has an integrated pivoting lever. When dismantling the diverter tube, the shaft remains in the front bearing together with the swivel lever, while the diverter tube, which can be detached from the shaft, is removed from the thick matter collection tank.

In another embodiment, at least one hydraulic pivoting cylinder is connected to the pivoting lever to drive the shaft in rotation, which is preferably mounted and/or designed such that the shaft coupled to the pivoting cylinder is axially displaceable. Two swivel cylinders are preferably provided. The at least one pivoting cylinder is preferably attached at one end to the pivoting lever and is mounted at the other end on the thick matter conveying device, in particular on the thick matter collection container. Because the swivel cylinder or cylinders allow a certain axial displacement of the shaft, it can be moved in the front bearing to separate it from the transfer tube without having to dismantle the swivel cylinder or cylinders. This greatly simplifies assembly/disassembly.

In a further embodiment it is provided that the front bearing comprises a removable bearing part which has one of the two bearing points for the shaft. The front bearing is therefore constructed in particular in two parts, with embodiments having more than two bearing parts and/or more than one removable bearing part also being possible. The divisibility of the front bearing allows the shaft to be shifted in the axial direction in order to separate it from the transfer tube. The detachable part is preferably located at the end of the front bearing facing away from the transfer tube and thus functions as a detachable end piece.

It can also be provided that the detachable bearing part also serves as a reinforcement for the front wall of the thick matter collection container, so that additional reinforcements or clasps for absorbing the tensile forces are not required. This is particularly advantageous when the front wall is not designed as a solid base plate, as in generic solutions, but as a lighter frame construction.

In a further embodiment it is provided that the front bearing is designed in such a way that after removal of the detachable bearing part, the shaft can be separated from the diverter valve by axial displacement relative to the remaining part of the front bearing.

Another embodiment provides that the front bearing is arranged in a front wall of the thick matter collection container designed as a frame structure, the front wall preferably also having two intake openings via which the delivery cylinders are connected to the interior of the thick matter collection container. The frame construction is lighter than the massive base plates used in previous devices and thus leads to a weight reduction of the entire thick matter conveying device.

In a further embodiment it is provided that the pivoting lever and the at least one pivoting cylinder are arranged within the frame structure of the front wall. As a result, the semi-rotary drive is better protected against dirt and damage.

In a further embodiment it is provided that the frame structure comprises two side walls, with each of the bearing points being arranged in the area of one of the side walls. As a result, the forces acting on the transfer tube can be optimally introduced via the bearing points into the front wall or the side walls of the front wall designed as a frame construction.

In a further embodiment it is provided that the shaft has a toothing at the end facing the diverter valve, which engages with a corresponding toothing of the diverter valve and can be separated from it. In particular, the gearing of the shaft can be separated from the gearing of the transfer tube by axial displacement of the shaft relative to the transfer tube. The gearing converts a rotation of the shaft into a rotation or pivoting movement of the transfer tube. In addition, a releasable locking or attachment of the shaft in a receptacle of the transfer tube can be provided.

In a further embodiment it is provided that the transfer tube is rotatably mounted in the rear area of the thick matter collection container (in particular in the area of the delivery line) via a rear bearing. When swiveling the transfer tube, the rear connection on the rear bearing rotates in relation to the delivery line, with a permanent tight connection. To dismantle the transfer tube, the connection on the rear bearing can preferably be loosened or separated.

In a further embodiment it is provided that the diverter tube is an S-tube, with the front bearing preferably being arranged above two suction openings, via which the delivery cylinders are connected to the interior of the thick matter collection container. On the inside of the thick matter collection tank A wear plate can be arranged in the area of the intake openings, which is swept over or contacted by the opening of the diverter valve on the delivery cylinder side and protects the inner wall of the thick matter collection container.

• Trennen bzw. Entfernen des abnehmbaren Lagerteils von der vorderen Lagerung,
• axiales Verschieben der Welle relativ zum verbleibenden Teil der vorderen Lagerung in Richtung Außenseite des Dickstoffsammelbehälters, um die Welle von der Rohrweiche zu trennen, insbesondere unter Lösen der Verbindung einer Verzahnung der Welle mit einer in einer Aufnahme der Rohrweiche angeordneten Gegenverzahnung,
• Lösen der Verbindung der Rohrweiche mit der hinteren Lagerung, und
• Herausnehmen der Rohrweiche aus dem Dickstoffsammelbehälter.

The present invention further relates to a method for dismantling the diverter valve of a thick matter conveying device according to the invention with the following steps:

• separating or removing the detachable bearing part from the front bearing,
• axial displacement of the shaft relative to the remaining part of the front bearing in the direction of the outside of the thick matter collection container in order to separate the shaft from the diverter valve, in particular by releasing the connection of a toothing of the shaft with a counter-toothing arranged in a receptacle of the diverter valve,
• loosening the connection of the transfer tube with the rear bearing, and
• Removing the transfer tube from the sludge collection tank.

This obviously results in the same advantages and properties as for the thick matter conveying device according to the invention, which is why a repeated description is dispensed with at this point. To assemble the transfer tube, the steps are carried out in reverse order.

When separating or removing the detachable bearing part from the front bearing, it can be provided that a central screw of the front bearing must first be removed.

In one embodiment of the method according to the invention, it is provided that at least one hydraulic swivel cylinder for driving the shaft in rotation is connected to the swivel lever and is mounted in such a way that after the removable bearing part has been separated from the front bearing, the shaft coupled to the swivel cylinder can be displaced axially.

As a further step it can be provided that after separating the connection between the shaft and the diverter tube and before removing the diverter tube from the thick matter collection container, a folding bend provided on the delivery line is opened to relieve the diverter tube.

Figuren 1-5:

verschiedene Schritte bei der Demontage der Rohrweiche gemäß einem bevorzugten Ausführungsbeispiel der erfindungsgemäßen Dickstofffördervorrichtung in einer Seitenansicht auf einen Längsschnitt durch die Rohrweiche und deren Lagerungen;

Figur 6:

eine vergrößerte Ansicht der vorderen Lagerung gemäß dem in der Figur 1 eingezeichneten Kreis; und

Figur 7:

eine entsprechende Ansicht der vorderen Lagerung der Rohrweiche bei einer aus dem Stand der Technik bekannten Dickstofffördervorrichtung.

Further features, details and advantages of the invention result from the exemplary embodiment explained below with reference to the figures. Show it:

Figures 1-5:

various steps in the disassembly of the diverter valve according to a preferred embodiment of the thick matter conveying device according to the invention in a side view of a longitudinal section through the diverter valve and its bearings;

Figure 6:

an enlarged view of the front storage according to the in figure 1 drawn circle; and

Figure 7:

a corresponding view of the front bearing of the transfer tube in a thick matter conveying device known from the prior art.

the Figures 1-5 show an embodiment of the thick matter conveying device 10 according to the invention, wherein different steps in the dismantling process of the transfer tube 18 from the thick matter collecting container 14 are shown. The drawings represent longitudinal sections through the diverter valve 18 and its bearings in the front wall 40 of the thick matter collection container 14 and on the conveyor line 16. An enlarged section of the front bearing 20 according to that in FIG figure 1 drawn circle is in the figure 6 to see.

The transfer tube 18, which is designed as an S-tube, is used to alternately connect the delivery line 16 to one of two hydraulically driven delivery cylinders 12. The conveyor cylinder 12, which in the figure 1 shown only schematically by a dashed box are at one end at a Front wall 40 of the sludge collection container 14 is attached. The latter is preferably a feed hopper. The delivery cylinders 12 have cylinder openings at the ends facing the thick matter collection container 14 which cover corresponding suction openings in the front wall 40 . Through these suction openings, they alternately suck thick matter (e.g. concrete) out of the thick matter collection container 14 and press it through the transfer tube 18 into the delivery line 16 by means of a pump stroke.

For this purpose, the front end of the transfer tube 18 facing the delivery cylinders 12 is swiveled back and forth between the suction openings, so that the delivery cylinder 12 currently pumping is always connected to the delivery line 16, while the other delivery cylinder 12 sucks in thick matter through the free suction opening.

The diverter valve 18 is rotatably fastened or mounted on the conveying line 16 via a rear bearing 21 . The connection of the diverter valve 18 to or in the rear bearing 21 can be detached in order to disassemble the diverter valve 18 . On the front wall 40 of the thick matter collection container 14, the diverter valve 18 is pivotally mounted in a front bearing 20. For this purpose, a shaft 22 is connected to the transfer tube 18 and is rotatably mounted in the front bearing 20 . The front bearing 20 is integrated into the front wall 40 and constructed as a two-piece bearing with two axially spaced bearing points 24, via which the shaft 22 is mounted.

To drive the diverter valve 18, the shaft 22 has a pivoting lever 26 that protrudes radially on one side and is integral with the shaft 22, i.e. it is inseparably connected. At the end of the pivoting lever 26 are attached two hydraulic pivoting cylinders, not shown here, which are synchronized with the hydraulic drive of the delivery cylinders 12 in such a way that the previously described movement of the transfer tube 18 results.

The front wall 40 of the thick matter collecting container 14 forms a frame structure with two side walls, between which the pivoting lever 26 and the pivoting cylinder are arranged. As a result, these components are optimal protected against contamination and damage typical for pump operation. Furthermore, the frame design results in a significantly lighter construction of the thick matter collection container 14 than when using a one-piece base plate with the same strength as the entire frame structure. Due to the two-part bearing of the shaft 22 via the two bearing points 24, which are each arranged above or in the area of one of the two side walls of the front wall 40, the forces or loads that occur are optimally absorbed and introduced into the front wall 40. The fully assembled state of the transfer tube 18 and the front bearing 20 is in the figure 1 shown, an enlarged view of the front bearing 20 is in FIG figure 6 to see.

The front bearing 20 comprises a bearing part 30 firmly integrated into the front wall 40 (i.e. remaining) and a bearing part 28 that can be removed from the front wall 40, one of the bearing points 24 being arranged in/on one of the two bearing parts 28, 30. The removable bearing part 28 forms the end part of the front bearing 20 surrounding the shaft 22 at its end facing away from the transfer tube 18. The removable bearing part 28 can be detachably connected or locked to the front wall 40 and/or to the remaining bearing part 30.

The shaft 22 has at the other end facing the diverter tube 18 radially circumferential toothing 32 which, in the installed state, engages in a corresponding toothing of a receptacle 34 which is arranged at the upper end of the diverter tube 18 and surrounds the end of the shaft 22 . Through the connection of the teeth, a rotational movement of the shaft 22 is translated into a pivoting movement of the opening of the diverter valve 18 on the delivery cylinder side. The separable connection of the shaft 22 in the receptacle 34 of the transfer tube 18 can have an additional releasable connection or locking.

By removing the removable bearing part 28, it is possible to axially displace the shaft 22 together with the integrated pivoting lever 26 and thereby pull it out of the receptacle 34. As a result, the connection between shaft 22 or pivoting lever 26 and diverter valve 18 is separated. The separation point is within the Thick matter collection container 14. The swivel cylinders are mounted in or on the thick matter conveying device 10, in particular the thick matter collection container 14, or are designed in such a way that they allow such an axial displacement of the shaft 22 without having to be removed from the swivel lever 26. The previously explained process of separating the shaft 22 from the transfer tube 18 is in the figures 2 (Removal of the removable bearing part 28) and 3 (moving the shaft 22 outwards).

The rear bearing 21 of the transfer tube 18 on the delivery line 16 is then released. The rear bearing 21 can remain on the transfer tube 18 or on the conveying line 16. In particular, the rear bearing 21 is constructed in several parts, with a part remaining on the transfer tube 18 and a part on the conveying line 16 . It can be provided here that the bearing or the part remaining on the conveying line 16 can be pushed backwards for the removal of the transfer tube 18 without being removed.

Like in the figure 4 can be seen, in this exemplary embodiment the conveying line 16 also has a pivotable folding arch 36 . This is opened before the removal of the diverter tube 18 in order to relieve the diverter tube 18 . Now the diverter valve 18 can be removed from the sludge collector 14, as shown in FIG figure 5 you can see. The shaft 22 together with the pivoting lever 26 remain in the front bearing 20 or in the remaining bearing part 30. The diverter valve 18 is assembled in the reverse order.

The removable bearing part 28 also serves to reinforce the frame construction of the front wall 40, so that additional reinforcements or clasps to absorb the tensile forces, as was previously necessary, are no longer necessary.

the figure 7 shows the front bearing 20 of the diverter valve 18, designed as an S-tube, of a thick matter conveying device known from the prior art. Here the shaft 22 is firmly installed in the transfer tube 18 or connected to it and via a one-piece front bearing 20 in a solid base plate Front wall 40 of the sludge collection container 14 is mounted. On the outside of the thick matter collection container 14, at the opposite end of the shaft 22 from the transfer tube 18, a pivoting lever 26 is fastened to which the pivoting cylinders (not shown) are connected.

To disassemble the diverter tube 18, the pivoted lever 26 is removed from the shaft 22, i.e. the point of separation between the diverter tube 18 and the pivoted lever 26 is outside of the thick matter collection tank 14. To dismantle the diverter tube 18, the shaft 22 must also be removed and laboriously threaded out of the front bearing 20 , which is difficult due to the massive or heavy construction of the transfer tube 18 . For this purpose, the rear bearing 21 of the transfer tube 18 must also be dismantled in a complex manner so that the shaft 22 can be unthreaded.

Reference list:

10

sludge conveyor

12

delivery cylinder

14

sludge collection tank

16

delivery line

18

transfer tube

20

Front storage

21

Rear storage

22

Wave

24

storage place

26

swing lever

28

Removable storage part

30

Remaining stock part

32

gearing

34

recording

36

folding sheet

40

front wall

Claims (14)

Thick matter conveying device (10), in particular for conveying concrete, with two conveying cylinders (12) by means of which thick matter can be conveyed from a thick matter collecting container (14) into a conveying line (16), the conveying cylinders (12) being drivable in such a way that one of the conveying cylinders (12) executes a pumping stroke while at the same time the other delivery cylinder (12) executes a suction stroke, and a diverter tube (18) connected to the delivery line (16) is pivotably mounted on the thick matter collection container (14) and via a bearing (20) in the front rotatably mounted shaft (22) can be driven in such a way that it alternately connects the delivery line (16) to the delivery cylinder (12) each executing a pump stroke,
characterized,
that the shaft (22) is mounted in the front bearing (20) via at least two bearing points (24) and can be separated from the transfer tube (18). Thick matter conveying device (10) according to claim 1, characterized in that the shaft (20) has a pivoting lever (26) via which it rotates can be driven, the pivoting lever (26) preferably being arranged between the two bearing points (24). Thick matter conveying device (10) according to Claim 2, characterized in that the pivoting lever (26) is firmly connected, in particular in one piece, to the shaft (22). Thick matter conveying device (10) according to Claim 2 or 3, characterized in that at least one hydraulic pivoting cylinder for driving the shaft (22) in rotation is connected to the pivoting lever (26), which is preferably mounted and/or designed in such a way that the pivoting cylinder coupled shaft (22) is axially displaceable. Thick matter conveying device (10) according to one of the preceding claims, characterized in that the front bearing (20) comprises a removable bearing part (28) which has one of the two bearing points (24) for the shaft (22). Thick matter conveying device (10) according to Claim 5, characterized in that the front bearing (20) is designed in such a way that, after removal of the detachable bearing part (28), the shaft (22) can be moved relative to the remaining part (30) of the front bearing ( 20) can be separated from the transfer tube (18). The thick matter conveying device (10) according to one of the preceding claims, characterized in that the front bearing (20) is arranged in a front wall (40) of the thick matter collecting container (14) designed as a frame structure, the front wall (40) preferably also having two suction openings via the delivery cylinders (12) are connected to the interior of the thick matter collection container (14). Thick matter conveyor (10) according to claims 4 and 7, characterized in that the pivot lever (26) and the at least one Pivoting cylinders are arranged within the frame structure of the front wall (40). The sludge conveying device (10) according to claim 7 or 8, characterized in that the frame structure comprises two side walls, each of the bearing points (24) being arranged in the region of one of the side walls. Thick matter conveying device (10) according to one of the preceding claims, characterized in that the shaft (22) has teeth (32) at the end facing the diverter tube (18), which engages with a corresponding toothing of the diverter tube (18) and from this is separable, in particular by axial displacement of the shaft (22) relative to the transfer tube (18) is separable. Thick matter conveying device (10) according to one of the preceding claims, characterized in that the diverter valve (18) is rotatably mounted in a rear region of the thick matter collecting container (14), in particular in the region of the conveying line (16), via a rear bearing (21). Thick matter conveying device (10) according to one of the preceding claims, characterized in that the diverter valve (18) is an S-pipe, the front bearing (20) preferably being arranged above two suction openings, via which the conveying cylinders (12) communicate with the interior of the Are connected to the sludge collection tank (14). Method for dismantling the diverter valve (18) of a thick matter conveying device (10) according to claim 6, with the steps: - removing the detachable bearing part (28) from the front bearing (20), - axial displacement of the shaft (22) relative to the remaining part (30) of the front bearing (20) in the direction of the outside of the thick matter collecting tank (14) in order to separate the shaft (22) from the diverter valve (18), - loosening the connection of the transfer tube (18) with the delivery line (16), and - Remove the transfer tube (18) from the thick matter collection tank (14). Method according to Claim 13, characterized in that at least one hydraulic pivoting cylinder for driving the shaft (22) in rotation is connected to the pivoting lever (26), which is mounted in such a way that after separating the removable bearing part (28) from the front bearing (20 ) the shaft (22) coupled to the swivel cylinder is axially displaceable.

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