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Device in valve

A technology of valves and valve casings, which is applied in the field of devices in valves, can solve problems such as expensive and complicated device manufacturing, and achieve the effects of low pressure gradient, reduced risk of vibration, and high stability

Inactive Publication Date: 2002-06-12
NAF
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the devices are relatively complex to manufacture and thus expensive

Method used

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  • Device in valve
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Embodiment Construction

[0013] The spherical valve 1 comprises a valve housing 2 on opposite sides of which an inlet 3 and an outlet 4 are arranged. A valve body 5 with a substantially cylindrical passage 6 is pivotally mounted inside the valve housing 2 . Figure 1a A shaft 5a connected to the valve body 5 for operating the valve body 5 is shown. In the fully open position of the valve 1, the inlet 3 and outlet 4 and the channels are in line with each other. Figure 1b Also shown are two annular seals 7a, 7b for sealing between the inlet 3 and outlet 4 and the valve body 5 respectively. Those skilled in the art will appreciate that in some applications only one seal is required.

[0014] According to the invention, at least one pair of intersecting walls 8a, 8b (see Figure 2a ) and 9a, 9b and 10a, 10b (see FIG. 3a) are set in the channel 6. as from Figure 2a and 4 As seen, we will now first refer to the Figure 2a , 2b and 4 detail the construction of a pair of walls arranged like a cross i...

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Abstract

A valve (1) has a valve housing (2) with an inlet (3) and outlet (4), a valve body (5), provided with an essentially cylindrical passage (6) and pivotally mounted in the housing (2). Essentially plane walls, defining chambers between them and provided with through openings (11; 11') are arranged in the passage (6). Upon opening the valve the inlet connects solely with one chamber, which via wall openings and intermediate chambers connects with the chamber opposite and the latter with the outlet. During the successive opening sequence of the valve more and more chambers and finally all chambers are made to connect with the inlet and the outlet respectively. The device has at least one pair of intersecting walls (8a, 8b; 9a, 9b, 10a, 10b). These are located in the passage (6), so that two opposing chambers (K1, K4; k1, k9) situated nearest to the inlet (3) and the outlet (4) respectively lie symmetrically in relation to a center plane, in which the central axis (6a) of the passage is situated during the rotational movement vice-versa (5) between the opened and the closed position and vice-versa.

Description

technical field [0001] The invention relates to a device in a valve, in particular of the type specified in the preamble-characterizing part of claim 1 . [0002] The invention also relates to a method according to the preamble-characterizing part of claim 6 . Background technique [0003] It is known that, in valves of this type, cavitation and high noise levels occur at large hydraulic gradients. [0004] For example, devices have been disclosed in European Patent Applications No. 87901700.2 and No. 81302496.5 for reducing the tendency of cavitation and the resulting noise. However, the devices are relatively complex to manufacture and therefore expensive. Contents of the invention [0005] The object of the invention is to produce a device of the stated type which is simpler than the prior art. This is achieved according to the invention by a device having the features specified in the characterizing part of claim 1 . ...

Claims

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Application Information

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IPC IPC(8): F16K5/06F16K47/04
CPCF16K47/045F16K5/0605Y10T137/86743
Inventor 珀·伦德奎斯特
Owner NAF