DE3025699A1 - VALVE ARRANGEMENT FOR A PISTON PUMP - Google Patents

Description

The invention relates to a valve arrangement for a piston pump with a valve body and a valve seat.

In such a piston pump, the valve body which represents a valve area in the intake channel and / or outlet channel generally has a flat disc shape. The valve seat for the valve body thus also has a flat seat or support surface.

In such a valve mechanism, the fluid impinges on the valve body so that it is substantially at right angles with respect to of the valve body flows and a large amount of energy

stir the valve body is generated with the valve seat, resulting in a noise. The valve body is designed in such a way that that it can be pressed resiliently against the valve seat by a spring. When the spring force only partially acts on the valve body and

- 2 1 30027/081 p

the valve body in contact with the valve seat during the pumping process 3025699 is brought or moved away from it, the valve body cannot be correctly positioned on the valve seat if the valve body sits on the valve seat again. In extreme cases it can even happen that the valve body does not function more fulfilled.

In contrast, the object of the invention is to provide a valve arrangement of the type described above, which allows the fluid to flow smoothly therethrough, and which also makes it easier to touch Energy generated by the valve body and valve seat is reduced.

This object is achieved in that the valve body to the valve seat has a spherical surface.

In preferred embodiments of the invention, the valve seat cooperating with the valve body has a concave or conical one Seat or support surface on.

This means that when the valve body comes into contact with the valve seat generated energy and thus also the occurring noises are reduced and also the liquid can smooth along the spherical or concave or conical surfaces of the two together

acting parts flow.

In a further preferred embodiment, the valve body is can be pressed against the valve seat by a spring. Due to the

- 3 130027/0815

matching surfaces of the two parts, a partial action of the spring force of the spring is sufficient to automatically activate the valve body and easy to bring into its correct position.

Accordingly, the invention provides a valve arrangement for a piston pump with a valve body and a valve seat cooperating therewith, in which the valve body has a spherical shape towards the valve seat Surface and the valve seat has a concave or conical seat surface, so that the liquid smoothly or smoothly along the spherical or concave or conical surfaces of the valve body and valve seat can flow, whereby the when touching the valve body Energy generated with the valve seat and thus the noises that occur as a result can be reduced. When the valve body not sitting in the correct position on the valve seat, the valve body can due to the mutually adapted surfaces of the two parts can easily be brought into its correct position by spring force.

Embodiments of the invention are explained in more detail with reference to the drawings described. It show: ^

Fig. 1 is a longitudinal cross-section through a piston pump, which has a first Has embodiment of a valve assembly according to the invention;

Fig. 2 is an enlarged cross-sectional view of an essential part the valve arrangement according to FIGS. 1 and

130027/0816

3 is an enlarged cross-sectional view of a portion of a 3025693 further embodiment of the invention.

A piston 4 is displaceable in a cylinder area 2 of a piston pump 1 fitted in order to be able to be moved back and forth by means of a piston rod 3. A flange 5 is rigid on the piston rod on the back of the piston 4 (left in Fig. 1) attached. A box-like one Valve area 6 with an exhaust port 10 is attached to the front end of cylinder area 2. A valve seat 7 and a valve body 9, which can be pressed against the valve seat 7 by a spring 8, are arranged in the valve area 6. A sealing part 11 is in the rear Section of the cylinder region 2 arranged so that thereby a chamber 13 is formed with an inlet passage 12 formed therein.

According to the invention, the valve body 9 has a valve seat 7 spherical surface 14. The cooperating with the valve body 9 Valve seat 7 has a concave seat surface 15 which mates with the spherical surface of the valve body or this is equivalent to. If, therefore, when the pump is actuated during the compression stroke (with the piston stroke directed to the right in FIG. 1) of the piston 4 the valve body 9 is pushed away from the valve seat 7 against the force of the spring 8, the fluid or the liquid flows smoothly along it the spherical surface of the valve body 9 into the valve area and flows out through the outlet channel 10. Also, when you touch it The energy generated by the valve body 9 with the valve seat 7 is greatly reduced, and thus also the noises occurring in the process. If the

- 5 130027/0816

Valve body 9 is somewhat in the wrong position on the valve seat is located, for example slightly tilted or inclined with respect to the valve seat 7, the valve body may be in the wrong position can be corrected immediately by the action of the spherical mating seat surfaces 14 and 15 of the two parts.

Fig. 3 shows a further embodiment of the invention. At this Embodiment, the surface 14 of the valve body 9 towards the valve seat has a spherical shape, as in the first embodiment, while a seat surface 16 of the valve seat 7 ′ that interacts with the valve body 9 has a conical shape. These Embodiment has approximately the same effects as the first embodiment.

In the above description of the valve arrangement according to the invention only the valve area in the outlet area of the pump was described. Of course, the valve arrangement according to the invention can also be used in the valve area on the suction side.

Since the valve body has a spherical surface towards the valve seat and the valve seat cooperating with the valve body has a concave or conical seat surface, the liquid or the fluid smoothly along the spherical or conical or conical

kaven surfaces of the two interacting parts. In addition, the When the valve body is brought into contact with the valve seat, the energy generated and thus also the noises that occur are reduced. In addition, if the return force of the spring is partly due to the valve

- 6 130027/0815

acts body, the valve body can due to the interaction the surfaces of the valve body and valve seat can be automatically and easily returned to the normal position.

130027/0816

Blank page

Claims (4)

PATENT Attorney DIPL.-ING. JÜRGEN BETTEN Authorized representative at the European Patent Office Bellen patent attorney office ■ Schleissheimer Str. 2 ■ 8000 Munich 2) '. . ·. '' ·.-Ui-; > Schleissheimer Str. D-8000 Munich K.K. Maruyama Seisakusho Telephone ο89 / 521283 Chiyoda-ku, Tokyo, Japan Private 089/187743 Telex 522505 spec Attention J. Betten Valve arrangement for a piston pump Telegram electropat July 7, 1980 M MS 01 PATENT CLAIMS 1.) Valve arrangement for a piston pump with a valve body and a valve seat, characterized in that that the valve body (9) has a spherical surface (14) towards the valve seat (7). 2. Valve arrangement according to claim 1, characterized in that that the valve seat (7) cooperating with the valve body (9) has a concave seat or support surface (15). 3. Valve arrangement according to claim 1, characterized in that that the valve seat cooperating with the valve body (9) (7) has a conical seat surface (16). 4. Valve arrangement according to one of claims 1 to 3, characterized in that the valve body (9) by a The spring (8) can be pressed against the valve seat (7). - 1 1 30027/0816 BANK: BAVARIAN ASSOCIATION BANK MÖNCHEN ACCOUNT NO. 561437 BLZ 70020270 POST CHECK: MÖNCHEN ACCOUNT NO. 56816-805 bank code 70010080