Improvements in Cocks or Valves for Blast Pipes.
Year: 1890

page_text: Date of Application, 18th June, 1890-Accepted, 6th Sept.. 1890
COMPLETE SPECIFICATION.
Improvements in Cocks or Valves for Blast Pipes.
I, MARTIN BÖCKER of Friedenshutte, in the German Empire Manager of Blast
Furnaces, do hereby declare the nature of this invention and in what manner the
same is to be performed to be particularly described and ascertained in and by the
following statement :-
The dampers such as hitherto used in blast pipes are liable to great injury owing to
the high temperature at which blast furnaces are now generally worked; they get out
of shape are rapidly attacked by rust and also within a comparatively short time get
clogged through dust which interferes with their sliding motion.
These drawbacks make themselves felt especially in the case of the dampers used in
connection with the tuyeres, so much so in fact that it has been found necessary
lately to dispense with dampers altogether as none of the constructions hitherto
suggested when applied to tuyeres was free from the defects in question. And yet
series of tuyeres unprovided with dampers or an equivalent device offer great obstacles
to the successful working and are not unlikely even to cause explosion so that they
imperil the whole plant.
The device forming the subject of the present invention is adapted to act with ease
and certainty while it is free from the inconveniences above referred to.
In the accompanying drawings
Fig. 1 is a section of my improved damper or valve when closed, and
Fig. 2 shows the same when opened that is turned round at an angle of 90 degrees.
This damper or valve consists of two sections of pipes S' S³ provided with seats a¹ a²
for the spherical valve to rest upon. A washer bis arranged at the end of the tube S
and behind it is a piece c carrying projections d d. The length of tube S' is provided
with two tappets or stops ff. By means of two clamping or locking devices
consisting of a strap e e of a gibi and a cotter the said straps surrounding on one
side the projection d and on the other side supported behind the stops the spherical
valve A is firmly pressed upon its seats a' or a² in tube S¹ or S³ respectively and
locked in place by the operation of the cotters 9 g.
This
B is a handle whereby the valve may be opened or closed as required, it being for
this purpose arranged upon the projection on the spherical valve A.
projection is inserted between the two arms e e¹ of the strap so that the spherical
valve A can only be rotated in one determined direction according as it is required
to open or shut the valve.
To open or shut the valve the cotters 9 are loosened and the valve A is turned
round by means of the handle Bat an angle of 90° whereupon the cotters are tightened
again. The advantages of this form of valve over the dampers hitherto used are
obvious. The tight closing surfaces of the seats a¹ a² are comparatively small so that
the probability of their being injured by dust is greatly reduced.
Owing to the fact that the valve arrangement consists of a number of separate parts
which may be easily disconnected the motion of the valve is not liable to be interfered
with by either rust or dust. Should any part of the device become defective after
being used for some time it can practically at a moment's notice be replaced by a
spare piece the disconnection of the various parts being extremely easy.
The spherical valve and seat forming in reality a ball and socket joint is
thereby particularly adapted to permit of the easy adjustment of tuyeres or series of
tuyeres.
Lastly the closing effected by this valve is perfectly tight and firm.

page_text: Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed I declare that what I
claim is ;-
A cut off cock or valve for blast pipes arranged between seats a' a² provided at the
ends of lengths of tubes S' S2 and fitted with a locking device whereby the said
seats a¹ and a² are pressed against the surfaces of the cock or valve for which purpose
before opening or closing the cock or valve the said locking device is loosened and
when the desired movement is completed it is tightened again whereby the sections
of tubes S¹ and S' are through the action of the said locking device brought nearer
together or farther apart the whole substantially as described and illustrated in the
accompanying drawings.
Dated this 18th day of June 1890
W. P. THOMPSON & BOULT,
Agents for the Applicant.