DE7820951U1 - PISTON PUMP WITH THROUGH CYLINDER - Google Patents

Description

DIPL.-ING. UANS W. GROENINU

PATENT ADVOCATE

Reinhardt-Technik GmbH & Co.Waldheimstrasse 3
5883 K iers ρ e

R 39 - 11 Gbm

Piston pump with continuous cylinder Description

The invention relates to a piston pump, in particular for multi-component resin mixing systems, with a one-piece pump housing which has a continuous cylinder bore, the piston-side end is connected to a suction line with a check valve, while on the other The end of the piston rod of a piston is tightly mounted in a guide bush and in the cylinder

SIEBERTSTH. * · 8000 MUNICH 88 ■ POB 8S034O · KJlBSI .: ΗΗΕΙΝΙΆΤΕΚΤ · TEL ·. (089) 471079 - TEI

7820951 10/26/78

bore is guided by a sealing bushing, which the cylinder bore in a piston-side suction chamber and a piston rod-side ejection space divided by an overflow line with Non-return valve are connected, with the piston rod and the piston forming a differential piston, in such a way that the piston sucked into the suction chamber and through the overflow line into the express chamber volume of liquid pumped corresponds to that which the piston leaves the expressing space in pumps out a pressure line connected to this.

In a known piston pump of the aforementioned type with a one-piece pump housing If the piston is shrunk into a pump housing, the cylinder bore into a suction chamber and a sealing bush dividing a push-out space. These for high pressure operation suitable construction is for normal operation because of the complex production and the tight tolerances of the sealing parts uneconomical and time-consuming to assemble.

The invention is based on the object of providing an improved piston pump of the type just mentioned create that is easier, more economical and faster to manufacture.

According to the invention, this object is achieved by that the piston from the leading to the piston rod and

- 3

7820951 10/26/78

• On this tightened sealing bushing with at least an end recess for receiving a sealing ring and at least one adjacent to it There is a pressure washer, the pressure of which can be adjusted by • a screw nut on the piston rod is.

The advantages of the invention are that the use of a sealing ring the tight tolerances makes unnecessary for the sealing parts, which simplifies the production, and the takeover of the sealing sleeve enables simple assembly as a piston part.

In the drawing, a pump housing 1 of a piston pump is illustrated in longitudinal section, the one has continuous cylinder bore 2, in which the piston 3 is sealingly guided. The piston rod side The end of the pump housing has a slightly enlarged diameter bore 4 into which a Pührungsbuchse 5 is screwed, in which the piston rod 6 is sealingly mounted. The end part of the piston rod 6 has a reduced diameter for receiving the piston 3. This consists of one Sealing bushing 7 drawn onto the piston rod end part with an annular recess at the end for receiving a sealing ring 8, one adjacent to it, also pulled onto the Xolbenstangenendteil Thrust washer 9 and one at the end of the piston

- 4th

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6tan.ge screw nut 1o for connecting <Jruckregu3, ation and thus to increase the tightness between piston and cylinder bore. The sealing bush 7 w5.rd over the tightened screw nut pressed against the shoulder 11 of the piston rod without play.

The piston 3 divides the cylinder space formed by the cylinder bore 2 into a suction space 12 and into an expressing space 13. In the suction space, the piston 3 sucks a liquid from the line 14, e.g. a component of a multi-component resin, and displaces a volume corresponding to the piston Liquid volume through an overflow line 15, into which a check valve 16 is connected, into the Expressing space 13, from which the liquid on the return stroke of the piston 3 in one of the cross-sectional differences between Piston and piston rod corresponding amount is pushed out through a line 17.

The upper end of the cylinder housing is cylindrical Provided recesses of different diameters, the insertion of a packing with a Serve clamping nuts, while the lower end has a screw-threaded recess for insertion a screw nipple for the suction line 14 is equipped. These are features that are known per se and are therefore not shown in more detail.

7820951 10/26/78

Claims (1)

DIPL.-ING. HANS W. GROENING PATE N TANWA-LT Reinhardt-Technik GmbH & Co.
Waldheimstrasse 3
5883 K iers ρ e R 39 - 11 Gbm Piston pump with a continuous cylinder Protection claim Piston pump / especially for multi-component resin mixing systems, with a one-piece design whose piston side end to j · • ine intake passage with check valve CONNECTED \ "s is Deten pump housing which has a through f Äerbohrung cylinder, while the mutual end of the piston rod of a piston in a guide bush tightly
stored and in the cylinder bore by a sealing SIEBERTSTH, 4 · 8000 MUNICH 86 ■ POB SOO 840 · CABLE: RnEINPATENT · TEL. (OSSI 4710 70 TELEX 3-2S659 7820951 10/26/78 \ processing bushing is guided, which the cylinder bore in a piston-side suction chamber and a piston rod-side push-out space divided by an overflow line with a non-return valve are connected, the piston rod and the piston having a differential piston form in such a way that that from the piston into the anterior chamber Volume of liquid sucked in and pumped through the overflow line into the expressing chamber corresponds to that which the piston from the ejection space into a pressure line connected to this pumps out, characterized in that the piston (3) from the piston rod (6) leading and on this tightened sealing bushing (7) with at least one end. Recess for receiving a sealing ring (8) and at least one pressure washer (9) resting on it, the pressure of which can be adjusted by means of a screw nut (1o) on the piston rod (6). 7820951 10/26/78