Improvements in or relating to Valves for Rag and Pulp Engines and like Apparatus, in which Thick or Viscid Material is Treated or Employed.
Year: 1897

page_text: Date of Application, 5th May, 1897
Complete Specification Left, 5th Feb., 1898-Accepted, 9th Apr., 1898
Improvements in or relating to Valves for Rag and Pulp Engines and
like Apparatus, in which Thick or Viscid Material is Treated or
Employed.
I, ROBERT DIETRICH, Paper Manufacturer, of Merseburg, in the Empire of
Germany, do hereby declare the nature of this invention to be as follows:-
This invention relates to rag pulp and similar engines. When the stuff intro-
duced into a rag engine, is in a very thick condition it is often a considerable time
after the valve has been lifted from its seat, before the stiff pasty mass begins to
move, especially when the discharging conduit is only slightly inclined, so that
the pipes easily become obstructed. Another drawback consists in the fact, that
first the thicker stuff escapes through the valve, then gradually the thinner
stuff, and finally on rinsing out the rag engine, the very thin stuff. Owing to
this irregularity of the thickness of the stuff flowing out from the rag engine the
paper or material produced is also of unequal thickness.
To remedy this drawback I have constructed a new or improved valve for this
purpose. This valve has for its object to permit on the one hand a quick escape of
the whole mass, and on the other hand to give the mass a uniform quality for the
purpose of thus avoiding the main cause of producing paper having unequal thick-
ness or quality.
The valve is surrounded by a water chamber having preferably a cross section
of rectangular form and communicating by means of a pipe with any suitable
receiver containing water under pressure which is injected through openings
arranged either in the cover or on the inner side of the water chamber, into the
pulp mass in order to dilute the latter in a uniform manner.
The seat of the valve is surrounded by a water-chamber or channel having
preferably a rectangular cross section and communicating through a pipe with
any suitable pressure water apparatus. The lower part of the valve-seat terminates
in a tubular part serving as a connecting piece with the stirring vats. The water
chamber is enlarged at the parts into which is screwed the supply pipe, and is closed
at the top by means of a plate containing the openings through which the water
under pressure is injected into the stuff.
The borings of these openings are preferably conically directed towards the
opening of the valve, so that the water jets escaping through the said openings
from an inverted funnel Behind these water jets there may be arranged a second
row of borings the direction of which is contrary to that of the movement of the
stuff in the rag-engine whereby the water escaping therefrom is thoroughly mixed
with the stuff or paste, diluting the latter in a uniform manner.
These openings, the number and shape of which may be as desired, may be
arranged also in the inner wall of the water chamber. In this construction water
under pressure cannot be injected into the stuff, when the valve is closed but only
when the latter is opened. In this arrangement especially when carried out on

page_text: a small scale and where the closure is a tight one, the stop-cock inserted in the
pressure water pipe may be dispensed with.
The injection openings are always directed in such a manner, that the water
jet escaping therefrom is directed in a direction opposite to that of the stuff,
whereby an intimate mixture of the stuff with the water and a uniform dilution
of the stuff is attained.
Such valves may be used therefore also for drawing off and diluting other thick
or viscid liquids, so that the abovementioned advantages may be applied also to
other industrial branches.
BOULT & WADE,
Agents for the Applicant.
Improvements in or relating to Valves for Rag and Pulp Engines and
like Apparatus, in which Thick or Viscid Material is Treated or
Employed.
I, ROBERT DIETRICH, Paper Manufacturer, of Merseburg, in the Empire of
Germany, 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:.
This invention relates to rag pulp and similar engines. When the material
introduced into a rag engine, is in a very thick condition it is often a considerable
time after the valve has been lifted from its seat, before the stiff pasty mass begins
to move, especially when the discharging conduit has only a slight incline, so that
the pipes easily become obstructed. Another drawback consists in the fact, that
first the thicker material escapes through the valve, then, gradually, the thinner
material, and finally on rinsing out the rag engine, the very thin material. Owing
to this irregularity of the consistency of the material flowing out from the rag
engine the paper or material produced is also of unequal consistency.
To remedy this drawback I have constructed a new and improved valve for this
purpose. This valve has for its object to permit on the one hand a quick escape
of the whole material, and on the other hand to give it a uniform consistency, for
the purpose of thus avoiding the main cause of producing paper having unequal
consistency.
The object of the different constructions of apparatus adapted to be used for the
practical application of the invention, some of which are illustrated by way of
example, is to effect the diluting of the material from the bottom or lower part
where the material is thickest and densest, and thereby to assist its movement and
prevent the blocking or obstruction of the valve and to make the material of even
consistency. Hitherto the substance has only been diluted from above the mass
which operation was combined with the above-mentioned drawbacks. By intro-
ducing suitable quantities of water, under a desired pressure, into (and not onto) tho
substance, from the bottom or underneath all the advantages are attained, and it
is immaterial whether the introduction is effected directly by means of the outlet
valve, or by means of a special injecting device combined with the outlet valve,
or arranged in the bottom or conduit adjacent to said valve.
In the arrangement for carrying out this invention illustrated in the accom-
panying drawings by way of example;
Figure 1 is a section of a valve with one form of water injecting device.

page_text: Figure 2 is a plan view, while
Figure 3 shows on a smaller scale a modified construction of the valve.
In Figures 1 and 2 of the drawings the valve is surrounded by a water chamber b
having preferably a cross section of rectangular form and communicating by
means of a pipe c with any suitable receiver containing water under pressure,
which is injected through openings, arranged in the cover of the water chamber,
into the pulp mass, in order to dilute the latter in a uniform manner.
The tubular part d of the valve seat is connected with the stirring vats. The
water-chamber is preferably enlarged at the part into, which the supply pipe c
is inserted and is closed at the top by means of a plate e containing openings
through which water under pressure is injected or sprayed into the material.
1
The borings of these openings are preferably conically directed towards the
opening of the valve, so that the water escaping through said openings forms
a funnel or cone. Besides these water jets, there may be arranged a second row of
borings, the direction of which is contrary to that of the movement of the material
in the rag engine whereby the water escaping therefrom is thoroughly mixed with
the paste or material and dilutes the latter in a uniform manner.
These openings for supplying injection liquid directly into the material, may be
arranged in any number, shape and position desired, for instance, as shown in
Figure 3, they may be arranged in the inner wall f of the water chamber. In this
construction water under pressure cannot be injected into the material when
the valve is closed, but only when the latter is opened. In this arrangement,
especially when carried out on a small scale and where the closure is a tight one,
the stop cock inserted in the pressure-water pipe c may be dispensed with.
The injection openings are directed in such a manner, that the water-jets escape
therefrom in a direction opposite or substantially opposite to the movement of the
material, whereby an intimate mixture of the material with the water, and a
uniform dilution of it is attained.
Such valves may be used also for drawing off and diluting other thick or
viscid materials so that the above mentioned device may be applied also to other
industrial branches.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is:-
:-
1. In the treatment of thick or viscid material in rag, pulp or similar engines
or apparatus, the application of water to the lower or more concentrated portion
of the mass for the purpose described.
2. In the treatment of thick or viscid material in rag, pulp or similar engines
or apparatus, the application of water from underneath and in a direction sub-
stantially opposite to that of the movement of the material for the purpose
described.
3. The combination with a valve for rag, pulp or similar engines or apparatus
of means for injecting liquid into the mass from underneath said mass, whereby, the
latter is diluted.
.4. In valve apparatus for rag, pulp and similar engines means for introducing
liquid underneath the mass, the valve seat being provided with a liquid chamber or
channel, through the cover of which liquid under pressure may be injected into the
pulp mass in order to dilute it, substantially as described.
5. The combination with a valve for rag, pulp or similar engines or apparatus
of means for injecting liquid into the mass, comprising a liquid chamber or
channel, the inner wall of which is provided with injection openings, through
which liquid under pressure is injected into the pulp mass in order to dilute it
substantially as described.
6. The complete valve apparatus for rag, pulp or similar engines or apparatus,
substantially as described and illustrated in Figures 1 and 2 or in Figure 3 of the
accompanying drawings.

page_text: 7. The employment of a valve of the character described for use in drawing
off from receptacles and diluting thick and viscid liquid materials, substantially
as set forth.
Dated this 5th day of Wahmuar 1808
BOULT & WADE,
Agents for the Applicant.