EP1944511B1 - Material feed receptacle for a thick matter pump - Google Patents

Abstract

The container has a rim batch on a container attachment and aligning with another rim batch (68) in a lower part. A material conveyer opening is covered with a hinged cover that is made up of an artificial material and pivoted to an upper front wall batch (46) on the attachment. The wall batch has a flange attached loosely with another flange on a lower front wall batch. A joining solution is provided between the flanges.

Description

The invention relates to a material feed container for a slurry pump according to the preamble of claim 1, see WO 03 042 535 with the closest prior art.

From the EP 1 076 596 B1 For example, a material feed container for thick matter pumps is known, which has an upwardly open container bottom part and a container attachment releasably connected thereto via a flange connection. The peripheral upper edge of the container attachment limits the material feed opening. In the container base an agitator is mounted, the bearings are in an open-edged recess of the container base, so that the agitator is easily replaceable after removal of the container attachment. The container attachment forms a hopper for thick matter, such as concrete. The filling of the concrete is usually carried out in that a truck mixer approaches the material supply container and fills the concrete via a channel in the material supply container. To avoid that the container attachment is damaged by a collision with the approaching truck mixer, the container attachment must be made of sturdy sheet metal. This requires a high weight, so that the container attachment can not be easily removed by hand.

Material feed container according to EP 1 076 596 B1 have in the delivery cylinder openings intermediate rings as wearing parts that protect the belonging to the container end wall inner surface of the delivery cylinder opening from wear by flowing concrete. These intermediate rings must be replaced regularly due to wear. Since the intermediate rings are inserted from the delivery cylinder side into the delivery cylinder opening, the delivery cylinder must first be removed from the container end wall for mounting and dismounting. This is expensive.

It is an object of the invention to develop a material supply container of the type mentioned in such a way that it is easier to maintain and that wearing parts can be replaced easily.

The object is achieved by a material supply container having the features of claim 1. Advantageous embodiments of the invention are the subject of the dependent claims.

The solution according to the invention is based on the idea that it requires less effort to mount the intermediate rings on the inside of the container and to dismantle as over the container outside. This avoids that when replacing the intermediate rings, the delivery cylinder must be disconnected from the material supply container. An intermediate ring is inserted into the delivery cylinder opening via the interior of the container by pushing the cam on its outer lateral surface into the bayonet opening and subsequently rotating the intermediate ring about its longitudinal axis, so that the cam is inserted into the inner groove. The mounting of an intermediate ring on the container interior is particularly advantageous when the material feed container, as described above, is formed in two parts. By removing the relatively light container top the inside of the container is easily accessible.

The inner groove may be formed circumferentially in the delivery cylinder opening. Preferably, the intermediate ring carries on its outer circumferential surface at least two, preferably three equally spaced angularly arranged cams. The delivery cylinder opening then has a number of cam corresponding number of bayonet openings, which are also arranged at the same angular distance from each other. Since the intermediate ring is fixed in the axial direction by the engagement of the cams in the inner groove, this fixation is more stable, the more cams are arranged on the outer lateral surface.

Appropriately, a connection plate for connecting delivery cylinders is attached to the container outside of the container end wall, through which extend the delivery cylinder openings. Furthermore, a spectacle plate having two spectacle plate openings is expediently releasably attached to the inner surface of the container end wall. The spectacle plate openings communicate with the delivery cylinder openings, and their boundary surfaces are aligned with the boundary surfaces of the flow passages in the intermediate rings. The spectacle plate thus covers a part of the delivery cylinder openings and additionally fixes the intermediate rings in the direction of the container interior. To replace the intermediate rings, the spectacle plate is removed.

The intermediate ring and / or the spectacle plate expediently consist at least partially of a wear-resistant lightweight material. The lightweight material may comprise a carbon fiber reinforced plastic and / or a glass fiber reinforced plastic. It is also possible that the lightweight material is silicon carbide or a metal foam, the latter preferably having titanium constituents.

Suitably, the boundary surfaces of the flow channels and / or the spectacle plate openings are coated with a wear layer. This preferably consists of a hard metal or of a material of the material group chromium, silicon carbide or ceramic. The spectacle plate and the intermediate rings, which are each wearing parts, are protected by the wear layer against wear and must therefore be replaced less frequently.

It can be provided that the diameter of the flow channel tapers towards the container interior or towards the delivery cylinder. Thus, delivery cylinders of different inner diameters can be connected to the material supply container by using different intermediate rings in the delivery cylinder openings. The flow channels are expediently dimensioned so that their boundary surfaces are aligned with the inner surfaces of the delivery cylinder.

Advantageously, the intermediate ring in its lateral surface at least one axially opposite the cam offset circumferential groove with a sealing ring for engagement with the container end wall and / or the connection plate. Preferably, it has two circumferential grooves, one of which receives one against the container end wall, the other one applied to the connection plate sealing ring. The intermediate ring may have on one of the spectacle plate facing end face a further circumferential groove with a voltage applied to the spectacle plate sealing ring. These measures provide a good seal of the material feed container in the area of the delivery cylinder openings.

To facilitate assembly and disassembly, the intermediate ring may have recesses for inserting holding thorns on an end face facing the spectacle plate. Furthermore, between the intermediate ring and the container end wall, a circumferential cavity can be arranged, which can be filled with lubricant via a feed opening and which increases when the intermediate ring is withdrawn from the delivery cylinder opening. For disassembly of the intermediate ring then a mounting ring is used with holding thorns, which engage in the recesses of the intermediate ring. With the help of the mounting ring of the intermediate ring is rotated to solve the bayonet closure. Subsequently, a lubricant, such as grease, is pressed into the cavity, so that the intermediate ring is pressed out of the delivery cylinder opening, wherein the cams are moved through the bayonet openings.

The advantageous development according to claim 17 is based on the idea that a material supply opening covering, hinged to a container wall hinged lid made of plastic or a lightweight material is easier to clean than a conventional hinged lid Sheet. Thick material, especially concrete, adheres much less to plastic than to sheet metal. The hinged lid is expediently designed as a hollow plastic body with a first plastic shell facing the material feed opening and a second plastic shell preferably connected in one piece with this, forming a top side of the lid. A plastic hollow body is relatively stable with low weight. This is particularly advantageous when the hinged lid is hinged to the container attachment and must be removed together with the container attachment for maintenance work inside the container.

The advantageous development according to claim 18 is based on the idea to make the interior of the material feed container for maintenance personnel more accessible by having an easily demountable and detachable container attachment on the end wall side. However, the container top does not extend to the rear wall which faces the approaching truck mixer. Thus, the peripheral edge bounding the material feed opening has, on the rear wall side, an edge part belonging to the container lower part. The container attachment is thus protected against damage by the truck mixer. It must therefore not be designed as stable as the container base and can have a relatively low weight.

Fig. 1

eine Seitenansicht einer fahrbaren Betonpumpe mit rückwärtigem Materialaufgabebehälter;

Fig. 2

eine perspektivische Darstellung des Materialaufgabebehälters mit abgehobenem Behälteraufsatz;

Fig. 3

eine perspektivische Ansicht des Behälteraufsatzes ohne Klappdeckel;

Fig. 4

einen Schnitt durch die Behälterwand im Bereich einer Förderzylinderöffnung;

Fig. 5

eine perspektivische Ansicht eines aus der Förderzylinderöffnung gezogenen Zwischenrings;

Fig. 6a und 6b

perspektivische Ansichten eines Klappdeckels gemäß einem zweiten Ausführungsbeispiel von schräg oben und schräg unten;

Fig. 7

einen Schnitt durch den Klappdeckel nach Fig. 6a und 6b entlang der Linie A-A;

Fig. 8a und 8b

Detaildarstellungen des Klappdeckels nach Fig. 6a und 6b im Schnitt.

In the following the invention will be explained in more detail with reference to embodiments schematically illustrated in the drawing. Show it

Fig. 1

a side view of a mobile concrete pump with rear material feed container;

Fig. 2

a perspective view of the material feed container with lifted container top;

Fig. 3

a perspective view of the container top without hinged lid;

Fig. 4

a section through the container wall in the region of a delivery cylinder opening;

Fig. 5

a perspective view of a drawn from the delivery cylinder opening intermediate ring;

Fig. 6a and 6b

perspective views of a hinged lid according to a second embodiment obliquely from above and obliquely below;

Fig. 7

a section through the hinged lid after Fig. 6a and 6b along the line AA;

Fig. 8a and 8b

Details of the hinged lid after Fig. 6a and 6b on average.

In the Fig. 1 shown in the drive state truck concrete pump has a chassis 10, a front-side cab 12, a mounted on a pivot bracket 14 of the chassis 10 concrete distribution boom 16 and arranged on the chassis 10 two-cylinder slurry pump 18. The arranged in the rear part of the chassis 10 material feed container 20 has in its end wall 22 delivery cylinder openings 24 through which two delivery cylinder 26 of the slurry pump 18 are connected. At the end wall 22 opposite the rear wall 28 of the material feed container 20 is a discharge nozzle 30, to which a delivery line 32 is connected. In the interior of the container is a here formed as S-tube diverter 34, which is connected at one end to the discharge nozzle 30 and the other end alternately about the axis of a pivot shaft, not shown, by hydraulic means in front of the two delivery cylinder openings 24 is pivotable.

The material feed container 20 (FIG. Fig. 2 ) is divided into a container bottom 38 and a container top 40. The end wall 22 and the side walls 42 connecting the end wall 22 to the rear wall 28 are divided into two upper and one lower parts. In this case, the container attachment 40 has an upper end wall portion 44 and extending therefrom upper side wall portions 46 with free ends 48 on ( Fig. 3 ). The upper end wall portion 44 and the upper side wall portions 46 carry at its lower edge a first flange 50 for attachment of the container top 40 on the container base 38. The container top 40 is made in one piece as an injection molded part made of plastic in the embodiment shown here. For reinforcement reinforcing strips 52 are formed on him.

The container lower part 38 has, in addition to a bottom 54 and the rear wall 28, a lower end wall portion 56 and lower side wall portions 58. The lower side wall portions 58 drop obliquely from the lower end wall portion 56 and carry a second flange 60 complementary to the first flange 50. The two flanges 50, 60 are connected in a simple manner by means of screws 62. Between them, a rubber seal can be arranged so that the container base 38 and container attachment 40 can be assembled in a simple manner to the material supply container 20.

The material supply container 20 has an upwardly facing material feed opening 64, which is delimited by a peripheral edge 66, 68. The peripheral edge is divided into two edge parts 66, 68. The first edge portion 66 is formed by the upper edge of the upper end wall portion 44 and the upper side wall portions 46. It is followed by the second edge part 68, which is formed by the upper edge of a rubber apron 70. This is attached to the container base 38 and protrudes beyond the rear wall 28 and extending away from the rear wall 28 portions of the lower side wall portions 58 addition. The two edge parts 66, 68 are aligned.

In the container base 38 bearing openings 72 are arranged in the side walls 42, which serve to receive bearings of a stirrer. In the rear wall 28, a rear wall opening 73 is arranged, via which the pipe switch 34 can be connected to the discharge nozzle 30. In the lower end wall portion 56 are the delivery cylinder openings 24 for connecting the delivery cylinder 26. Thus, all movable during pumping components in the container base 38 are mounted, which absorbs the outgoing of these components forces. Accordingly, the container base 38 is made of sturdy, thick-walled sheet steel. On the container top 40 only forces that originate from the filled into the material supply port 64 concrete act. Its stability is therefore much lower requirements.

The container base 38 has over the lower end wall portion 56 projecting tubular support elements 74 for a grid. Alternatively, the grate can also be placed on a support bead which is provided on the container top 40. The material supply container 20 is attached via hangers 76 on the chassis 10.

At the container outer side, a connection plate 80 is attached to the end wall 22 for connecting the delivery cylinder 26. On the inside of the end wall 22, a spectacle plate 82 is releasably attached ( Fig. 4 ) whose spectacle plate openings 84 communicate with the delivery cylinder openings 24. The spectacle plate 82 projects beyond the conveying cylinder openings 24 and thus forms a stop for an intermediate ring 86 in the direction of the container interior. The intermediate ring 86 extends in the axial direction over the delivery cylinder opening 24 extending through the end wall 22 and the connection plate 80. Its inner surface delimits one Throughflow 88 for the thick material. The outer circumferential surface 90 of the intermediate ring 86 carries three arranged at an angular distance of 120 ° cam 92. These are over bayonet openings 95 can be inserted into an inner groove 94 running around in the delivery cylinder opening 24 and thus form a bayonet closure, by means of which the intermediate ring 86 can be fixed in the delivery cylinder opening 24 in the axial direction to the delivery cylinder 26. The boundary surface of the flow channel 88 is aligned with the boundary surface of the spectacle plate openings 84 and with the inner surfaces of the conveyor cylinder 26. Thus, there are no exposed edges in the delivery cylinder opening 24, which would be exposed to increased wear by passing thick material. For further reduction of wear, both the spectacle plate 82 and the boundary surface of the flow-through channel 88 have a wear layer 89 made of hard metal. To seal the delivery cylinder opening 24, the intermediate ring 86 in its lateral surface 90 has two axially opposite the cam 92 offset circumferential grooves 96, are inserted into the sealing rings 98 for abutment against the end wall 22 and the connection plate 80. Another circumferential groove 96 is located in the end face of the intermediate ring 86 facing the spectacle plate 82. The sealing ring 98 contained in it bears against the spectacle plate 82.

To replace the intermediate ring 86, the spectacle plate 82 is first unscrewed. Subsequently, the intermediate ring 86 is rotated about its longitudinal axis until the cams 92 can be pulled out of the bayonet openings 95. For this purpose, the intermediate ring on its end face recesses 100 for insertion of holding thorns. Between the intermediate ring 86 and the end wall 22, a circumferential cavity 102 is also arranged, which is fillable via a feed opening 104 with grease. The cavity 102 increases upon withdrawal of the intermediate ring 86 from the delivery cylinder opening 24 in the direction of the container interior. Thus, the injection of grease through the feed opening 104 facilitates the removal of the intermediate ring 86. The grease also acts as a lubricant, which facilitates the rotation of the intermediate ring 86. In general, the wear parts spectacle plate 82 and intermediate ring 86 are replaced together.

At the material supply container 20 according to Fig. 2 is hinged to the upper end wall portion 44 via hinges 106, a hinged lid 108 which covers the material feed opening 64. Instead of this hinged lid 108 made of metal can be used according to a second embodiment, a hinged lid 110 made of plastic, as in the Figures 6a and 6b shown. The hinged lid 110 is formed as a hollow plastic body, as shown in the sectional view in Fig. 7 evident. It has a first plastic shell 112 facing the material supply opening 64 and a second plastic shell 114 integrally connected thereto and forming a cover surface. The hinged lid 110 is integrally formed by a spin casting method. The first plastic shell 112 has a smooth surface facing the material supply opening 64, from which soiling with thick material, in particular concrete, can be easily removed. The second plastic shell 114 has stiffening beads 116 which increase its stability. Furthermore, hooks 118 are formed laterally on the hinged lid 110 ( Fig. 8a ), in which the closure of the material supply opening 64 on the material supply container 20 fastened fastener elements can be hooked to form a tension lock in the. Furthermore, handles 120 are formed laterally on the hinged lid 110 ( Fig. 8b ). Between the hinged lid 110 and the material feed container 20 may further gas springs are arranged, which facilitate opening of the hinged lid 110. On the first plastic shell 112, the hinged lid 110 has holes 122, 124. A first group of bores 122 serve to attach handles and locking elements that hold the flip cover 110 in an open position. A second group of bores 124 serve to attach a rubber apron which covers the gap between the hinged lid 110 and the material feed container 20 and prevents thick matter from flowing through this gap.

Claims (18)

1. Material feed receptacle for a thick-matter pump (18), having an upwardly oriented material-feed opening (64), having two feed-cylinder openings (24), which extend through a receptacle end wall (22), and having a pipe switch (34) which is arranged in the receptacle interior, can be pivoted, on the entry side, in front of the feed-cylinder openings (24) and opens out, on the exit side, into a delivery pipe (30), there being arranged in the feed-cylinder openings (24) a respective intermediate ring (86) of which the inner surface bounds a throughflow channel (88) for the thick matter, characterized in that the outer lateral surface (90) of the intermediate ring (86) bears at least one protuberance (92), and in that the receptacle end wall (22), in each feed-cylinder opening (24), has at least one at least partially encircling inner groove (94) and at least one bayonet opening (95), running to the inner groove (94) from an inner surface directed towards the receptacle interior, for accommodating the protuberance (92) to form a bayonet closure.
2. Material feed receptacle according to Claim 1, characterized in that an attachment plate (80) for the attachment of feed cylinders (26) is fitted on the receptacle end wall (22), on the outside of the receptacle, and in that the feed-cylinder openings (24) extend through the attachment plate (80).
3. Material feed receptacle according to Claim 1 or 2, characterized in that, on its outer lateral surface (90), the intermediate ring (86) bears at least two protuberances (92), preferably three protuberances arranged at equal angular spacings from one another, and in that the feed-cylinder opening (24) has a number of bayonet openings (95) which corresponds to the number of protuberances (92), the bayonet openings being arranged at equal angular spacings from one another.
4. Material feed receptacle according to one of the preceding claims, characterized in that the inner groove (94) is formed all the way round the feed-cylinder opening (24).
5. Material feed receptacle according to one of the preceding claims, characterized in that a face plate (82) with two face-plate openings (84) is fastened in a releasable manner on the inner surface of the receptacle end wall (22), the face-plate openings (84) communicating with the feed-cylinder openings (24), and the boundary surfaces of the face-plate openings (84) being aligned with the boundary surfaces of the throughflow channels (88).
6. Material feed receptacle according to one of the preceding claims, characterized in that the intermediate ring (86) and/or the face plate (82) consist/consists, at least in part, of a wear-resistant lightweight construction material.
7. Material feed receptacle according to Claim 6, characterized in that the lightweight construction material of the intermediate ring (86) and/or of the face plate (82) has a carbon-fibre-reinforced plastic and/or a glass-fibre-reinforced plastic.
8. Material feed receptacle according to Claim 6, characterized in that the lightweight construction material of the intermediate ring (86) and/or of the face plate (82) is silicon carbide.
9. Material feed receptacle according to Claim 6, characterized in that the lightweight construction material of the intermediate ring (86) and/or of the face plate (82) is a metal foam, preferably with titanium constituents.
10. Material feed receptacle according to one of the preceding claims, characterized in that the boundary surfaces of the throughflow channels (88) and/or of the face-plate openings (84) are coated with a wear layer (89) preferably made of a hard metal or other material from the following group of materials: chromium, silicon carbide and ceramic material.
11. Material feed receptacle according to one of the preceding claims, characterized in that the diameter of the throughflow channel (88) tapers in the direction of the receptacle interior or in the direction of the feed cylinder (26).
12. Material feed receptacle according to one of the preceding claims, characterized in that the boundary surfaces of the throughflow channels (88) are aligned with the inner surfaces of the feed cylinders (26).
13. Material feed receptacle according to one of the preceding claims, characterized in that the intermediate ring (86), in its lateral surface (90), has at least one encircling groove (96) which is offset axially in relation to the protuberances (92) and has a sealing ring (98) for abutment against the receptacle end wall (22) and/or against the attachment plate (80).
14. Material feed receptacle according to one of the preceding claims, characterized in that the intermediate ring (86), on an end surface which is directed towards the face plate (82), has an encircling groove (96) with a sealing ring (98) butting against the face plate (82).
15. Material feed receptacle according to one of the preceding claims, characterized in that the intermediate ring (86), on an end surface which is directed towards the face plate (82), has recesses (100) into which retaining pins can be inserted.
16. Material feed receptacle according to one of the preceding claims, characterized by the arrangement, between the intermediate ring (86) and the receptacle end wall (22), of an encircling cavity (102) which can be filled with lubricant via a feed opening (104) and increases in size as the intermediate ring (86) is drawn out of the feed-cylinder opening (24).
17. Material feed receptacle according to one of the preceding claims, characterized by a swing-action cover (110), made of plastic and/or other lightweight construction material, which is articulated on a receptacle wall, preferably on the receptacle end wall (22) and is intended for covering the material-feed opening (64).
18. Material feed receptacle according to one of the preceding claims, characterized in that the material-feed opening is bounded by an encircling periphery (66, 68), in that the material feed receptacle has a bottom receptacle part (38) and a receptacle attachment (40) connected in a releasable manner to the bottom receptacle part (38), and also has a two-part end wall (22), a rear wall (28) and two respectively two-part side walls (42), in that the feed-cylinder openings (24) are arranged in the end wall (22), in that the receptacle attachment (40) has a top end-wall portion (44) and top side-wall portions (46) which extend away from the end-wall portion and have free ends (48), and in that the encircling periphery (66, 68) has a first peripheral portion (66), which forms a top edge of the receptacle attachment (40), and a second peripheral portion (68), which adjoins the first peripheral portion (66) and is formed on the rear wall of the bottom receptacle part (38).

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