Improvements in and connected with Distribution Valves for Hydraulic Pumping Engines.
Year: 1898

page_text: PROVISIONAL SPECIFICATION.
Improvements in and connected with Distribution Valves for
Hydraulic Pumping Engines.
I, JOSEPH MOORE, of 65, Priory Road, Kew Gardens, in the County of Surrey,
Engineer, do hereby declare the nature of this invention to be as follows, that is
to say:
-
My said invention comprises an improved construction and arrangement of
distribution valves and parts connected therewith for hydraulic pumping engines.
In the case, for example, of a pumping engine consisting of a pair of single-
acting power cylinders, four distribution valves are employed in carrying out the
invention, two applied to ports by which the pressure water is admitted to the
passages or pipes leading to the power cylinders, and two to exhaust ports. The
valves are in the form of rams working through stuffing boxes in the valve chest,
their inner ends, or enlargements thereon, being adapted to bear on the port, seats
when closed. The valves are moved by means of pistons or plungers which are on
the valve rams and work in small cylinders, these pistons or plungers being of
somewhat larger area than the valve rams themselves. Small pipes connect the
cylinders to an auxiliary valve box in which are arranged valves for admitting
pressure water to the cylinders and for connecting the cylinders to the exhaust as
required. If the inlet and exhaust valves for one power cylinder are referred to
as A and B, and those of the other as C and D, then A and D have to be closed
when C and B are opened; and vice versa; and the small valve-moving cylinders
are connected by the small pipes or passages to the pressure and exhaust spaces
of the auxiliary valve box to suit such actions. The valves of the auxiliary valve
box are moved by levers acted on by tappets moved by the rams of the power
cylinders.
If the closings and openings of the main distribution valves are simultaneous
small quantities of pressure water may pass directly from an inlet port through an
exhaust port; but such action although unimportant, may be prevented by small
supplementary valves arranged to close the communications of the auxiliary valve
box with the exhaust and to be opened on the closing of a distribution inlet valve
almost reaching its seat. For this purpose studs or projections fixed to the inlet
valve rams are arranged to act on the rods of the supplementary valves.
In another modification of the improved valve apparatus, instead of the inlet
and exhaust distribution valves being moved by means of separate small cylinders,
one double-acting cylinder or equivalent, is employed, and is arranged to act
through levers on the distribution valves."
Doted this Twenty-ninth day of April 1898.

page_text: Improvements in and connected with Distribution Valves for
Hydraulic Pumping Engines.
I, JOSEPH MOORE, of 65, Priory Road, Kew Gardens, in the County of Surrey,
Engineer, 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, that is to say:-
My said invention comprises an improved construction and arrangement of
distribution valves and parts connected therewith for hydraulic pumping engines.
Valve apparatus as made with my improvements is shown upon two accompanying
sheets of explanatory drawings which are referred to in the following description.
Figure, 1, on Sheet, 1, of the drawings is a plan Figure, 2, is a sectional eleva-
tion, and Figure, 3, is an elevation as at right angles to Figure, 2. Figures, 4,
and 5, Sheet, 2, are horizontal and vertical sections corresponding to Figures, 1,
and 2. Figure, 6, is an enlarged horizontal section and Figure, 7, is an enlarged
vertical section showing auxiliary valves and other parts; and Figure, 8, is an
enlarged vertical section of an additional valve. In these drawings the same
reference letters and numerals are used to mark the same or like parts wherever
they are repeated.
My valve apparatus is applicable to various arrangements of the cylinders of
hydraulic pumping engines, but the example shown in the drawings are designed
for pumping engines in which a long ram, A, shown in section in Figure, 2, has
its ends working in pump cylinders, a crosshead, A 1, being fixed to the middle
of the ram, A, and having fixed to it two pairs of rams, B, working in power
cylinders, B1, placed at the sides of the pump cylinders, and each pair acting
together as one single-acting cylinder. There are four distribution valves, C; D,
E, F, contained in a box-like casting, G, two of them, C, E, being applied to ports
by which the pressure water is admitted to the passages or pipes, C1, E1, leading
to the power cylinders, B 1, and two, D, F, to exhaust ports. The valves, C, D, E, F,
are in the form of rams working through stuffing boxes in the valve chest G, their
inner ends or enlargements thereon being adapted to bear on the port seats when
closed. The valves are moved by means of pistons or plungers, of which two, E2,
F2, are shown in Figure, 5, and which are on the valve rams and work in small
cylinders, H, formed in a casting, H1, these pistons or plungers being of somewhat
larger area than the valve rams themselves. Small pipes, J, connect the cylinders
to an auxiliary valve box, K, in which are arranged valves, K1, for admitting
pressure water from pipes, K 2, to the cylinders, H, and for connecting the cylinders
to exhaust pipes, K3, as required. The pipes, J, are provided with valves for
regulating the speed of the actions. The valves, C, and F, have to be closed
when, E, and D, are opened, and vice versa; and the valve-moving cylinders, H,
are connected by the pipes or passages, J, to the pressure and exhaust spaces of
the auxiliary valve box, K, to suit such actions. The auxiliary valves, K1, are
moved by a rocking lever piece, L, which is acted on by a cam projection, L 1, on
a rod, L2, movable in guides and having on it adjustable catch pieces, L3, which
are acted on by a tappet, L4, fixed to the main crosshead, A 1.
A flanged opening, M, shown in Figure, 2, has the inlet pressure pipe fixed to it;
and another flanged opening, E1, has fixed to it the pipe and branch leading to
the pair of power cylinders, B 1, supposed to be removed in Figure, 2. The pipe
and branch, C1, leading to the other pair of power cylinders, B1, is shown in
Figure, 2, as is also the exhaust pipe, N, connecting the exhaust spaces of the
valve chest, G, to the box, N1, of the pump discharge valve.

page_text: If the closings and openings of the main distribution valves are simultaneous
small quantities of pressure water may pass directly from an inlet port through
an exhaust port; but such action although unimportant may be prevented by small
supplementary valves arranged to close the communications, K3, of the auxiliary
valve box, K, with the exhaust, and to be opened on a distribution inlet or exhaust
valve almost reaching its seat. Figure, 8, is an enlarged section of one of the
supplementary valves, P, in its box, P1; and in Figures, 1 to 5, the parts for
opening the valves are shown as in connection with the exhaust valve rams, D, F.
Each ram has fixed to it a forked projection, Q, which when the ram descends
encounters an adjustable screw nut, Q1, on the spindle, P2, of the supplementary
valve, P', which is thereby opened just as the ram valve, F, (or D) reaches its
seat. The exhaust pipe, K3, then communicates through the valve with a waste
outlet, P3, which allows the distribution inlet valve, E (or C) to open.
spring, Q2, on the valve spindle, P2, closes the valve when the exhaust valve, F,
(or D) opens.
A
In another modification of the improved valve apparatus, instead of the inlet
and exhaust distribution valves being moved by means of separate small cylinders,
one double-acting cylinder or equivalent, is employed, and is arranged to act
through levers on the distribution valves. For such modification the parts may
he such as are described (as in combination with different other parts) in my
Patent Specification No. 20,185 of 1897, and shown in Figure, 6, of the drawings
of that specification and marked with the references, T, TI, and, T2.
Having now particularly described and ascertained the nature of my said in-
vention and in what manner the same is to be performed, I declare that what I
claim is :―
1. The combination of parts constituting my improved distribution-valve apparates
for hydraulic pumping engines substantially as herein before described with reference
to Figures, 1 to 7, of the accompanying drawings and with or without the supple-
mentary valve described with reference to Figure, S, of the said drawings.
2. The modification of my improved apparatus in which a double-acting cylinder
combined with levers is used for moving the distribution valves substantially as
hereinbefore described.
Dated this Twenty-seventh day of January 1899.