ES2609916T3 - Vertical centrifugal pump module - Google Patents

Abstract

Vertical centrifugal pump module, in particular for installation submerged in a closed container, with an intermediate tube (17) that surrounds the axis (3) of the module arranged between a flashlight (5; 21) that carries the electric motor (1) of the module and crankcase (11) of the centrifugal pump (12), fixing the module in a flat piece (19; 29) running horizontally arranged below the flange (6) of the lantern (5; 21) , in particular in the lid of a container, characterized in that the intermediate tube (17) is made as a simple tube without flanges or other widenings on its front surfaces and the front surfaces are pressed by screw connections (18, 20; 25 ; 27) evenly distributed around the circumference against the lantern (5; 21) and the pump housing (11), the lantern (5; 21) and the flat part (19; 29) arranged below are connected to each other. through screw connections (18, 20; 25; 27; 30).

Description

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DESCRIPTION

Vertical centrifugal pump module

The object of the invention is a vertical centrifugal pump module, in particular for the installation submerged in a closed container, with an intermediate tube surrounding the axis of the module disposed between a flashlight that carries the module electric motor and the centrifugal pump housing , fixing the module in a flat piece that runs horizontally arranged below the flashlight flange, particularly in the lid of a container.

A module of this type is known from US 6 315 530 B1. The intermediate tube of this module is equipped with bottles, with the aid of which it is connected, on the one hand, with a corresponding flange of the lantern and, on the other hand, with the pressure cover of the centrifugal pump housing through screws. The flanges of an intermediate tube as such can be joined, as long as it is a molded part, of a single piece with the tube body. Moreover, the flanges can be joined with a tube by welding, which, however, increases processing costs. Regardless of how they were manufactured, the disadvantage that they are adapted, in each case, only to a certain axis length applies to the intermediate pipes arranged to be installed. Therefore, if a centrifugal pump module of this type is made in different construction lengths, it is necessary in the case of intermediate pipes manufactured by casting technique for each one of its own mold. Adaptations to construction lengths not foreseen so far are very complicated, but even impossible, due to the high costs.

Document DE 1 528 888 A1 discloses a suspension pump for corrosive means in which between the motor or the overlap flange and the pump housing as a joint, a block made in a compact manner is provided as a corrosion-resistant plastic with a passage for drive the shaft through. The plastic block also serves as a pressure line for the centrifugal pump. The block is sized in such a way that despite a low mechanical resistance it is empowered to absorb the stresses that arise during operation.

The aim of the invention is to create a centrifugal pump module of the type mentioned at the beginning in which the preparation, adaptation and placement of the intermediate tube requires little effort.

The stated objective is solved according to the invention in such a way that the intermediate tube is made as a simple tube without flanges or other widenings on its front surfaces and the front surfaces are pressed by screw joints uniformly distributed around the circumference against the flashlight and the pump housing, the flashlight and the flat part arranged below through screw connections being connected together.

The flashlight can be equipped with two hole calculations arranged at different diameters. This makes it possible to use a unique realization of the flashlight in the case of different embodiments of centrifugal pump modules. In the case of modules with a larger diameter, the screw connections are made between the lantern, the flat piece and the pump housing through the larger diameter hole calculation, while the screw connections are housed at the same time as the flat part arranged below of the flashlight. In the case of the smaller diameter modules, the union between the flashlight and the pump housing is carried out through the smaller diameter hole calculation, while the flashlight joins through the larger diameter hole circle through screws With the flat piece.

As a convenient alternative to a fixation made directly on a container lid or the like of the module, a placement with the aid of a flange is suggested. To this end, the flat part arranged under the flashlight is configured as a loose flange. In this way the module can be fixed on different designed surfaces.

By means of the invention, it will be possible to quickly and easily adapt the lengths of intermediate tubes to the respective circumstances without having to establish different embodiments of intermediate tubes and keep them in storage. The intermediate tube made without flanges or other widenings can be connected with the aid of a screw connection known in principle to the lantern and the pump housing.

A preferred embodiment consists in the fact that the intermediate tube is tensioned by means of anchors with a tie between the lantern and the pump casing, housing in case of the use of the smaller orifice calculation the anchors with a strap at the same time the flat part arranged below the Flashlight with nuts.

An equally advantageous alternative is that the intermediate tube is provided with grooves that run along the entire circumference, in which, respectively, a loose flange provided with split joints with the aid of one or more projections arranged in its inner circumference, being joined this loose flange through a screw joint with the flat part arranged below the lantern flange, in particular the lid of a container or other loose flange. The type of flange used in this case is previously known in principle from DE 20 53 147.

In the case of another alternative, the intermediate tube is fitted with notches, in which elements of

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clamping in form, supporting the fastening elements, respectively, a loose flange provided with perforations for the housing of screw joints. The notches can consist of individual holes in which pins or similar elements are inserted; on these the loose flange rests.

Instead of individual holes, the intermediate tube may, however, also be provided with grooves that run along the entire circumference, which respectively house a support ring, on which the loose flange rests. A flange design of this type is previously known in principle from US 3 861 722.

Instead of a loose flange, individual sleeves can be provided evenly distributed around the circumference, which are housed by pins, which are arranged, in turn, in holes that are allowed to enter the intermediate tube. Thus, all the sleeves serve to accommodate the screw joint. While the

holes in the sleeves have smooth walls and the screw elements are formed by nuts

In addition, in the case of another alternative, instead of plain sleeves, nuts that directly accommodate screws or threaded bolts are designed correspondingly.

A preferred embodiment of the invention provides that the front surfaces of the intermediate tube rest immediately on the lantern flange and on the pump housing, in particular on its pressure side cover. This means that superfluas are explicitly flanges associated with the intermediate tube. This applies, in particular, in cases where the diameter of the intermediate tube corresponds to the opposite surfaces of the lantern flange or the pump case that serve to support its front surfaces.

Another advantageous configuration of the invention consists in that one or both front surfaces of the intermediate tube are supported, respectively, on a loose intercalated flange. Among others, this makes it possible to use a smaller diameter tube in the case of a larger diameter of the support surface in the flashlight, since a support surface that does not depend on the size of the flashlight for intermediate tube Starting from

the circumstance that instead of a tube with a large diameter one of this type with a smaller diameter can be used,

according to its nature, it is an essential economic advantage.

Thus, the advantageous concept that results from the nature of the invention can also be used with additional use, according to which the intermediate tube is formed by commercially available tube material, which is adapted, if necessary, by custom cutting corresponding to the respective conditions.

Another possibility of adapting the module to different circumstances results when spacers are arranged between the flat part, for example the flange, and the lantern below the electric motor. Said spacers, such as bushings, plates, rings or nuts, allow a quick adaptation of the module, in the case that occurs at the place of use, at different immersion depths. Therefore, the centrifugal pump module according to the invention replaces all embodiments whose axle or intermediate housing lengths are within the regulation range of the mentioned advantageous configuration.

Moreover, it is within the scope of the invention to also integrate intermediate bearings for the shaft in the design of the centrifugal pump module. For such a bearing arranged in the intermediate tube, two advantageous alternatives are presented above all:

In a first embodiment an intermediate bearing is used which is held in position by several screws that pass through the intermediate tube. This can be done in a preferred embodiment by means of three adjustable screws distributed uniformly across the circumference to be locked by means of nuts and locknuts, respectively, with the help of a thread arranged in the intermediate tube.

In a second embodiment an intermediate tube divided into two similar halves is used. Between the two halves, a support adapted in its contour to the front surfaces of the intermediate tube halves for an intermediate bearing is immobilized.

In a preferred embodiment of the invention, the intermediate bearing is supplied with lubrication liquid through a conduit. This conduit may be connected in a convenient configuration with the inner pressure side area of the centrifugal pump module.

By means of an embodiment, the invention is explained in more detail. The drawing shows in

Figure 1 a centrifugal pump module that corresponds to the state of the art with an axis of

cantilever module mounted alone on a flashlight;

Figure 2 a centrifugal pump module according to the invention, whose axis is configured

equally cantilever;

Figure 3 a pump module showing a variant of the invention, its axis being mounted even in

the pump case;

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Figures 4 to 6 Figures 7 and 8

Figure 9

details of alternative forms of module fixation;

two views of an intermediate bearing for the axis of a centrifugal pump module according to the invention;

a centrifugal pump module that corresponds to the invention with another possible intermediate bearing design.

The centrifugal pump module shown in Figure 1 which corresponds to the state of the art has an electric motor 1, which is connected through a coupling 2 with the axis of module 3. By means of two bearings 4 it is rotatably mounted. the module axis 3 in a flashlight 5. At its lower end, the flashlight 5 has a flange 6 that is detachably connected with a flange 7 of an intermediate tube 8 through a plurality of screws. The flange 7 of the intermediate tube 8 is connected, in turn, with the lid 9 of a container not shown through screws.

The intermediate tube 8 therefore enters the container; surrounds the axis of module 3. At its lower end, the intermediate tube 8 has a flange 10, which is detachably connected to the casing 11 of a centrifugal pump 12, also through a plurality of screws. The centrifugal pump 12 has a impeller 13 that aspirates the liquid that is in the container through an inlet 14 and transports it through an outlet 15 as well as a tube conduit 16 towards a non-shown tube conduit that is located out of the bowl

The intermediate tube 8 is manufactured with its flanges 7 and 10 in one piece in a casting process. This means that for each size of the intermediate tubes used, a proper casting model has to be preserved, and that from a predefined size arrangement various intermediate tubes can be made available only at a strongly high cost.

The embodiments depicted in Figures 2 and 3 overcome the problem shown by making available a theoretically unlimited number of possible sizes of intermediate tubes. This is made possible in such a way that intermediate tubes can only be made as simple tubes, that is, flanges are renounced. This gives rise to several advantageous possibilities: the tube material present will be cut to size without further ado to a desired extent; manufacturing and storage are therefore simplified. Above all, commercially common tube formats can now be used, which due to the renunciation of a separate elaboration of the intermediate tubes means a decisive economic advantage.

In principle, the embodiments of Figures 2 and 3 have in their largest part the same elements as the known realization of Figure 1. This is manifested in such a way that in the examples of realization the same pieces are endowed with the same references. However, there are still different features that result from the design according to the invention of the two embodiments:

In the case of the centrifugal pump module of Figure 2 an intermediate tube 17 is used, which is tensioned by means of anchors with shoulder 18 between the flange 6 of the lantern 5 and the pump case 11. Furthermore, it is housed by the Anchors with tie rod 18 a loose flange 19 used to fix the module on a vessel not shown. The loose flange 19, which rests immediately on the flange 6, is tensioned by nuts 20 that rest below it and above the flange 6.

Instead of fixing the module with the help of a loose flange, the module, however, can also be fixed immediately on a container lid. The type of fixation by itself would in principle be the same as that shown in Figure 2.

The embodiment of Figure 3 has a comparatively short flashlight 21 in which no bearing is provided for the module shaft 3. Instead, a sliding bearing 22 is provided on the cover 23 of the pump case 11 for mounting of axis 3. In this case it is a known type of assembly. However, there is a particularity in the arrangement of flange 19:

By means of bushings 24, which are pushed towards the anchors with tie rod 18, the flange 19 is moved in the direction of the pump case 11. The depth with which the model is immersed in a container or the like is reduced in this way. That is to say, with the help of said bushings 24 a quick and simple adaptation to different immersion depths can occur at all times. The centrifugal pump module can therefore be used in a variable manner.

Instead of bushings 24, spacers of other types, such as discs or plates, can also be used. Rings or tubes that cover the entire flange circumference can also be used. Finally, it is also possible to establish the desired distance by means of other nuts that are arranged above the loose flange 19 and below the lantern 6.

In Figures 4 and 5, elements of two alternative fasteners for anchoring with braces are represented.

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Figure 4 shows nuts 25 that are welded with pins 26. The pins 26 are anchored in perforations of the intermediate tube 17. The necessary screw connection is established by screws or threaded bolts, which are not shown.

Figure 5 shows an embodiment in which a loose second flange 27 is used. The loose flange 27 is supported on a plurality of pins 28, which are arranged evenly distributed by the circumference of the intermediate tube 17. Instead of the pins 28 inserted in individual holes a retaining ring which is arranged in a groove of the intermediate tube 17 that runs around can be used with a similar effect. A split loose flange can also be used at this point, arranged in a groove in the intermediate tube and fixed by the screw joint that is still to be placed.

Figure 6 shows an alternative of the union between a flashlight 21 and a flat piece 29. Flashlight 21 is equipped with two different diameter hole calculations. This allows its use in models of different sizes. In the embodiment shown a union is shown in the case of a smaller model. In this case, the flashlight flange 21 is connected, on the one hand, through screws 30 with the flat piece 29 and, on the other hand, through anchors with shoulder 18 with the pump case 11. In the case of a larger module an immediate union between the lantern 21 and the flat piece 29 will be carried out by means of anchors with tie 18 by the outer hole calculation. This type of union corresponds to the type represented in Figure 2.

In Figures 7 and 8 an intermediate bearing 31 is shown arranged in the intermediate tube 17. The intermediate bearing 31 is essentially composed of a bearing support 32 and a half-bearing 33 fixed therein. The shaft 3 carries, for its part, a bearing bushing 34 that interacts with the half-bearing 33. The bearing support 32 is fixed by means of pin screws 35 in the intermediate tube 17. The installation and alignment of the intermediate bearing 31 they are carried out in the manner in which the intermediate bearing 31 is pre-assembled first with screwed loose in the intermediate tube 17 and only after the thrust of the shaft 3 passing through is fixed by uniform tightening of the pin screws 35.

Figure 9 shows an embodiment in which two tubes 36 are assembled in the same manner to give a joint intermediate tube. Between the two tubes 36 a bearing support 37 is immobilized, which together with the tubes 36 is tensioned by anchors with tie rod 18. The intermediate bearing 38 supported by the bearing support 37 also surrounds in this case a sleeve 34 arranged on the axis 3 .

The bearings 31 and 38 of Figures 7 to 9 have, respectively, a lubrication of bearings, which is supplied with lubricating liquid through a conduit 39 connected to the pressure side of the pump module. The conduit 39 ends, in each case, in a bore 40 in the bearing support 32 or 37.

Claims (24)

5 10 fifteen twenty 25 30 35 40 Four. Five fifty 55 60 65 1. Vertical centrifugal pump module, in particular for installation submerged in a closed container, with an intermediate tube (17) that surrounds the axis (3) of the module arranged between a flashlight (5; 21) that carries the electric motor (1 ) of the module and the crankcase (11) of the centrifugal pump (12), the module being fixed in a flat piece (19; 29) that runs horizontally arranged below the flange (6) of the lantern (5); 21), in particular in the lid of a container, characterized in that the intermediate tube (17) is made as a simple tube without flanges or other widenings on its front surfaces and the front surfaces are pressed by screw connections (18, 20 ; 25; 27) evenly distributed around the circumference against the lantern (5; 21) and the pump case (11), the lantern (5; 21) and the flat part (19; 29) arranged together below through screw connections (18, 20; 25; 27; 30). 2. Centrifugal pump module according to claim 1, characterized in that the lantern (5; 21) is equipped with two orifice circles arranged at different diameters. 3. Centrifugal pump module according to claim 2, characterized in that the screw connections (30) between the flat part (29) and the lantern (5; 21) are carried out through the orifice circle of smaller diameter, being provided additionally screws (30) for the union of the flat piece (19; 29) with the flashlight (5; 21) that is carried out on the larger diameter hole calculation. 4. Centrifugal pump module according to claim 2, characterized in that the screw connections (18, 20; 25; 27) between the flat piece (29) and the lantern (5; 21) are carried out through the hole calculation of larger diameter, housing the screw connections (18, 20; 25; 27) at the same time the flat piece (19) arranged under the lantern (5; 21). 5. Centrifugal pump module according to one of claims 1 to 4, characterized in that the flat part (19; 29) arranged under the lantern (5; 21) is a loose flange. 6. Centrifugal pump module according to one of claims 1 to 5, characterized in that the intermediate tube (17) is tensioned by means of anchors with braces (18), the anchors being fixed with braces (18), on the one hand, in the flashlight (5; 21) and, on the other hand, in the pump case (11) by means of screw connection. 7. Centrifugal pump module according to claim 6, characterized in that the anchors with tie rod (18) at the same time house the flat part (19; 29) arranged under the lantern (5; 21) with the help of nuts (20) . 8. Centrifugal pump module according to one of the preceding claims, characterized in that the intermediate tube (17) is provided with grooves that run along the entire circumference, in which a loose flange provided with dividing joints with support, respectively, engages. of one or more projections arranged in its inner circumference, this loose flange being joined through screw connections with the piece (19; 29) flat. 9. Centrifugal pump module according to one of the preceding claims, characterized in that the intermediate tube (17) is fitted with notches, in which the fastening elements (28) engage in form drag, supporting the fastening elements (28) , respectively, a loose flange (27) provided with perforations for the housing of screw joints. 10. Centrifugal pump module according to one of the preceding claims, characterized in that the intermediate tube (17) is provided with grooves that run along the entire circumference, housing, respectively, a support ring on which the loose flange is pressed ( 27). 11. Centrifugal pump module according to claim 9, characterized in that the intermediate tube (17) is provided with holes uniformly distributed around the circumference, which serve to accommodate pins (28) that support, respectively, the loose flange (27 ). 12. Centrifugal pump module according to claim 9, characterized in that the intermediate tube (17) is provided with holes uniformly distributed around the circumference, which serve to accommodate pins (26), each of these pins carrying (26) ) a sleeve (25) for housing a screw joint. 13. Centrifugal pump module according to one of the preceding claims, characterized in that the front surfaces of the intermediate tube (17) rest on the flange (6) of the lantern (5; 21) and on the pump housing (11) , in particular on its pressure side cover. 14. Centrifugal pump module according to one of the preceding claims, characterized in that one or both front surfaces of the intermediate tube (17) are supported by another loose flange. 15. Centrifugal pump module according to one of the preceding claims, characterized in that the intermediate tube (17) is formed by commercially available tube material, which is adapted, where appropriate, by 5 10 fifteen twenty 25 30 shortening to the respective conditions. 16. Centrifugal pump module according to one of the preceding claims, characterized in that spacers (24) are arranged between the flat part (19; 29) and the lantern (5; 21). 17. Centrifugal pump module according to claim 16, characterized in that the spacers are formed by bushings (24). 18. Centrifugal pump module according to claim 16, characterized in that the distance is established by nuts (20) that are arranged above the flat part (19; 29) and below the lantern (5; 21). 19. Centrifugal pump module according to one of the preceding claims, characterized by an intermediate tube (17) equipped with an intermediate bearing (31) for the shaft (3). 20. Centrifugal pump module according to claim 19, characterized in that the intermediate bearing (31) is fixed by means of several screws (35) that pass through the intermediate tube (17). 21. Centrifugal pump module according to claim 20, characterized in that three adjustable screws (35) are distributed uniformly distributed by the circumference to be locked by means of nuts and locknuts with the aid of a thread arranged in the intermediate tube ( 17). 22. Centrifugal pump module according to claim 19, characterized by an intermediate tube subdivided into two similar halves (36), a support (37) adapted in its outline to the front surfaces of the halves being immobilized between the two halves (36). (36) for an intermediate bearing (38). 23. Centrifugal pump module according to one of claims 19 to 22, characterized in that the intermediate bearing (31; 38) is supplied with lubricating liquid through a conduit (39). 24. Centrifugal pump module according to claim 23, characterized in that the duct (39) is connected to the inner pressure side area of the centrifugal pump module.