DE2321165A1 - PUMP HOUSING MADE OF PLASTIC - Google Patents

Description

PATENT LAWYERS PROF. DR. DR. J. REITSTÖTTER DR.-ING. WOLFRAM BUNTE 2321165 DR. KARL GEORG LÖSCH D-BOOO MÜNCHEN 13, BAUERSTRASSE 22, POST BOX 78O FERNRUF (O811) 37 63 83 TELEX 3213208 ISAR Ct

Speck-Pumpen 'PATENT APPLICATION

Daniel Speck & Sons,
Hilpoltstein

Munich, April 26, 1973

M / 12540

M / 12541

Plastic pump housing

The present invention relates to a pump housing from
Plastic material, in particular for circulating pumps for swimming pool filter systems, which consists of a suction chamber, a pressure chamber and a partition arranged in between, the ^; "The pressure chamber is connected to the suction chamber via a suction opening: is.

Pump housing of the type described above consisted of at least 2 and mostly 3 parts that were glued or Welding are interconnected. The production of such glued or welded pump housings is expensive and associated with a lot of work. In addition, sealing problems always arise. In addition, the stability or Dimensional accuracy of such glued or welded pump housings is often insufficient, which is a considerable disadvantage represents, as the pump housing during operation

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is exposed to strong pressure surges due to, for example, rapid closing of valves or non-return valves. Another disadvantage of the previously known bonded pump housing is that such bonds often only are inadequately temperature-resistant, a factor that is very important for circulating pumps. Finally have by gluing or welding produced pump housings still have the serious disadvantage that due to the connection the individual housing parts by gluing or welding the use of reinforced and in particular glass fiber reinforced Plastics is excluded, since such reinforced plastics, if at all, only with increased effort and can be glued or welded with insufficient success. '-

There are also pump housings of the type described at the outset Art known, which are assembled from several housing parts which are connected to one another by screw connections are. In pump housings of this type, a considerable number of screw connections must be provided, which is important for the manufacture expensive and complicated and disadvantageous in this respect. In addition, there are also screwed pump housings of this type Sealing problems. . .

The present invention is based on the object of creating a pump housing of the type described at the outset, which is free from the above disadvantages and has a compact design.

In the case of a pump housing, this task is the same as that described at the beginning Art solved in that the suction chamber is open at the top and designed without undercuts, the suction chamber wall partially with the partition between the suction chamber and the open on the housing side and without undercuts

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trained.Pressure chamber is in one piece and the suction opening
the pressure chamber
^ is arranged.

the pressure chamber in the area of the one-piece partition part I

The pump housing according to the invention has the advantage that by
the integration of the Saugkammerwand in the forming the partition between _t suction chamber and pressure chamber housing inner rear wall of the pressure chamber an extremely compact construction

is possible. Another extremely important benefit j

of the pump housing according to the invention is that the i

according to the invention designed pump housing due to its.

compact design and the selected training ^;

formation of suction chamber and pressure chamber in one piece and preferred '

can be produced by extrusion or injection molding; whereby on the one hand all problems of the prior art in

Connection with the assembly of several pump housing ■

parts are avoided and on the other hand an extraordinary; cheap and yet qualitatively excellent production possible
is. The fact that the pump housing according to the invention consists of

a piece of plastic material, for example by;

Injection molding can be produced, so that subsequent adhesions;

or welding is not necessary, brings the further;

teren significant advantage that for the production of the invention ■ according to the pump housing reinforced and · in particular glass fiber j

reinforced plastic materials can be used!

what in terms of dimensional accuracy, stability, temperature! sensitivity, etc. brings considerable advantages. ■ In. has proven particularly effective in practice as a plastic i

material glass fiber reinforced polyamide. j

According to a preferred embodiment of the present invention, the suction chamber of the pump housing according to the invention has
ses cylindrical cross-section and is along a surface line
formed in one piece with the partition. According to a further

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Formation of the present invention, the cylindrical suction chamber can taper conically inside the housing. The present However, the invention is by no means limited to a cylindrical design of the suction chamber; any other cross-sectional shape, for example polygonal or square, is possible.

Advantageously, the suction chamber of the pump housing according to the invention weist- inside vertically extending guide webs for a corresponding recesses having Mudflap Jcörb on the ^1, for example, may rest on the bottom of the suction chamber and has the task to prevent the penetration of dirt into the pressure chamber of the pump.

According to a further development of the present invention, the pressure chamber and the suction chamber have closable drainage ports that allow the pump housing to be emptied, for example when it is shut down during the winter. According to a preferred embodiment of the present invention, the emptying opening opens into the suction chamber a discharge line coming from the discharge opening of the pressure chamber one, wherein both the outflow opening of the evacuation line on the outside of the housing and the evacuation opening of the suction chamber through one and the same closure member are lockable. The outflow opening of the emptying line preferably has an internal thread in its area the emptying opening of the suction chamber is cut out, so that by screwing in a locking bolt having an external thread both the outflow opening of the emptying line and the emptying opening of the suction chamber can be closed are.

In a further embodiment of the invention, the inventive The pump housing must be reinforced by ribs on the outside,

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which can optionally support blind walls, so that a
aesthetically pleasing design is achieved. A preferred one
Embodiment of the present invention is as follows
explained in detail with reference to the drawing. Show:

Figure 1 "an embodiment of the pump according to the invention;

housing mounted with impeller, pressure chamber cover, suction chamber cover and inserted dirt trap basket in the

Cut, ' ;

FIG. 2 the pump housing according to FIG. 1 unassembled,

Figure 3 is a plan view of the pump housing according to Figure 2 and

FIG. 4 shows a view of the pump housing according ^{to FIGS. 2 and 3:} to the pressure chamber side. :

The embodiment of the illustrated in the drawings: present invention shows a pump housing, according to; suction chamber 1, which is open at the top, is essentially cylindrical; is formed and has no undercuts. The cylindrical 'see suction chamber wall 2 is along a surface line with

the partition wall 3, which forms the rear wall of the pressure chamber 4, between the pressure chamber and the suction chamber part of the housing partially in one piece. In this from the partition 3 and the cylindrical; Suction chamber wall 2 formed integrated common partition; part is the suction opening 5, via which the pressure chamber 4 is supplied with fluid. The suction chamber 1 has in
an intake port 15 at the top. Inside the
Suction chamber 1 is in the assembled state a dirt trap basket 7, which is attached to the inner wall of the suction chamber
Web 6 is performed. These webs 6 prevent twisting
of the catcher basket in the pump housing.

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The pressure chamber 4, like the suction chamber T, on the housing side is open and without undercuts, has a discharge port 16 at the top. The pressure chamber 1 is designed and extends completely open on the housing side up to the upper pump housing cover, whereby, as in the case of the suction chamber 1, any undercuts are avoided, so that a simple one-piece production is possible, for example by injection molding.

In the embodiment of the present invention illustrated in the drawing, the pressure chamber 4 has an emptying opening 8 which, like the emptying opening 9 for the suction chamber 1, opens into an emptying line 10. This emptying line 10 has an internal thread in the area of its outlet opening 11. in the area of which the emptying opening 9 for the suction chamber 1 is cut out. In ^this:, it is possible, by turning one a corresponding |. Externally threaded locking bolt 12, both the ^training: flow opening 11 of the drain line 10 and the emptying opening 9 of the suction chamber 1 to close, so that 'a seal between the suction chamber 1 and pressure chamber is ensured 4 overall \ as erforder during pump operation - I borrowed it. - .- ■ .. "'...

According to Figure 4 are around the pump housing according to the invention | Strengthening ribs 17 are provided which reinforce and stiffen the housing and blind walls 18 which provide further reinforcement effect and allow a pleasing design.

The pump housing according to the invention is suitable, for example, for self-priming or non-self-priming circulating pumps. The present invention is not subject to any restrictions in this respect either.

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Claims (9)

Claims /1./Pump housing made of plastic material, in particular for j V _- / circulation pumps for swimming pool filter systems, consisting of> a suction chamber, a pressure chamber and a separating wall arranged in between, the pressure chamber being connected to the suction chamber via a suction opening through which ge indicates that the suction chamber (1) is open at the top and without undercuts
is formed, the suction chamber wall (2) partially with the 'partition (3) between the suction chamber and the housing side
open and formed without undercuts pressure chamber (4) is in one piece and the suction opening (5) of the pressure chamber in the region of the unitary partition member is arranged ■ reasonable. 'ι 2. Housing according to claim 1, characterized marked \ characterized in that the suction chamber (1) cylindrical
Has cross section and is formed in one piece with the partition wall (3) along a surface line. 3. Housing according to claim 2, characterized in that the cylindrical suction chamber (1)
tapers conically towards the inside of the housing. 4. Housing according to one of the preceding claims, characterized in that the suction chamber (1) on the inner wall vertically extending guide A09845 / 0595 webs (6) for a corresponding recesses Has dirt trap basket (7). 5. Housing according to one of the preceding claims, characterized in that the pressure chamber (4) and the suction chamber (1) have emptying openings (8 or 9). 6. Housing according to claim 5, characterized in that it is marked., that the emptying opening (9) of the suction chamber (1) in one of the emptying opening (8) of the j The discharge line (10) opens into the pressure chamber (4), the discharge opening (11) of the discharge line on the outside of the housing and the emptying opening of the suction chamber can be closed by one and the same closure element (12) are. 7. Housing according to claim 6, characterized. That the outflow opening (11) of the emptying line (10) has an internal thread, in the area (13) of which the emptying opening (9) of the suction chamber (1) is cut out, so that by screwing in a corresponding external thread having locking bolt (12) both the outflow opening and the emptying opening are lockable. 8. Housing according to one of the preceding claims, characterized in that it is in one piece consists of glass fiber reinforced plastic. 9. Housing according to claim 8, characterized in that that it is reinforced by ribs (17) on the outside, which may be blind walls (18). 308 / ha. 409845/0 595 Blank page