The
invention
- The
problem to be solved: butterfly
valve disc and spindle rotation owing to
precision casted driving ribs.
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- Definition:
The valve disk is secured on to
the symmetrically flattened actuator
spindle by 4 driving ribs formed inside
the bore of the disk. The flattened
surface of the spindle forms the locking
plane enabling the self-adjustment
against the locking stress of the disk.
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- Presentation:
The cast iron hosing is elastic
coated internally means steel-rubber bond
made by vulcanisation process. The
housing is made in one peace (monocast).
The rotation of the disc is insured by
the 4 ribs located inside in its bore,
matching to the machined surface of the
spindle, its enabling the disc for radial
and axial mouvment.
The load transmission plane is parallel
to the locking plane in closed state thus
allowing only small angular displacement
of the disk relative to the spindle. By
this angular displacement, effectively
self-alignment, of the disk caused by the
different stresses in the elastic coated
casing causes stress equalisation, in
effect resulting in substantial seal
security improvement, and less wear
significantly longer lifetime.
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- Advantages:
The valve disk does not require machining
and its self-alignment enable its
economical production with the highest
possible quality. The spindle bore of the
housing is a blind hole thus eliminating
the need of sealing. On the other hand
the elimination of the dowel pin as used
in other butterfly valve design also
ensures high standard and quality
improvement.
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- Stage
of development: The product was
presented on the INDUSTRIA 99 industrial
fair between 11-14 May 1999, Budapest with temporary patent during
the fair and the serial production of the
DN50-200 type has already started.
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- Documentation
available: Yes.
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The
inventor(s)
- Self
introduction:
I had worked for a industrial valve
manufacturer factory as a designer,
responsible for the development of valves
for pipelines.
Since I have been retired I started to
use AUTOCAD system, and I work on the
developing of valves according to my
conception.
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The
protection
- Form:
patent
application
- Priority:
- Countries
where it is force:
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Business
intention: seeking for utilisation
co-operation.
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| Contact
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