US3018628A - Remote control installations for the valves of marine tankers - Google Patents

Remote control installations for the valves of marine tankers Download PDF

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Publication number
US3018628A
US3018628A US780698A US78069858A US3018628A US 3018628 A US3018628 A US 3018628A US 780698 A US780698 A US 780698A US 78069858 A US78069858 A US 78069858A US 3018628 A US3018628 A US 3018628A
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Prior art keywords
valve
pressure
conduit
valves
jack
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Expired - Lifetime
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US780698A
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Pomper Victor
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Sigma
Industrielle Generale de Mecanique Appliquee SIGMA SA
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Sigma
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00Actuating devices; Operating means; Releasing devices
    • F16K31/12Actuating devices; Operating means; Releasing devices actuated by fluid
    • F16K31/122Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston
    • F16K31/124Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston servo actuated
    • F16K31/1245Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston servo actuated with more than one valve
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B63SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63BSHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B27/00Arrangement of ship-based loading or unloading equipment for cargo or passengers
    • B63B27/24Arrangement of ship-based loading or unloading equipment for cargo or passengers of pipe-lines
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00Fluid handling
    • Y10T137/8593Systems
    • Y10T137/87571Multiple inlet with single outlet
    • Y10T137/87676With flow control
    • Y10T137/87684Valve in each inlet

Description

Jan. 30, 1962 v POMPE 3,018,628
R REMOTE CONTROL INSTALLATIONS FOR THE 1 VALVES OF MARINE TANKERS Filed Dec. 16, 1958 2 Sheets-Sheet l lNVENTOR I VJcTor Povnrer BY XTm/Rfi YS' Jan. 30, 1962 v. POMPER REMOTE CONTROL INSTALLATIONS FOR THE VALVES OF MARINE TANKERS 2 Sheets-Sheet 2 Filed Dec. 16, 1958 /NVE/\/TOR Tor p mrer- BY ATTORN YS United States This invention relates to remote control installations for the hydraulic operation of so-called freight valves on marine tankers, used for emptying or syphoning out the tanks.
Such installations comprise a common source of liquid under pressure, a jack arranged in the vicinity of each valve and the movable member of which is mechanically connected to the valve member of the corresponding valve, a hydraulic control valve associated with each jack, and a device for indicating the movement or position of each valve member, this device being constituted by a liquid flow indicator.
In order to improve these installations, according to the present invention, the jacks are double acting jacks, each hydraulic control valve being such that the liquid discharged from one or the other of the active chambers of the corresponding jack by the displacements of the piston of the latter passes through the same discharge conduit and the said liquid flow indicator is arranged in this conduit.
The invention is illustrated by way of example in the accompanying drawings in which:
FIGS. 1 and 2 diagrammatically illustrate in elevation and in plan respectively, a tanker equipped with an installation in accordance with the invention.
FIG. 3 shows this installation in more detailed fashion with parts in section and parts in elevation.
In the drawings it is assumed that the installation according to the invention is applied to the remote control of valves A A A and A (FIGS. 1 and 2) of a tanker.
This installation comprises a hydraulic plant B which supplies oil under pressure and through as many control elements, such as C and C as there are valves, such as A and A to be controlled (FIG. 3), the said control elements being grouped at a control station D (FIG. 1). The valves, for example A and A each comprise a body 1 and a valve member 2 which is rigid with the rod 3 of the piston 4 of a double-acting jack, the casing 5 of which is fixed to the body of the valve 1, preferably above the latter. A sealing packing 6 separates the jack from the valve. The piston 4 divides the jack cylinder into an upper chamber 7 and a lower chamber 8.
The hydraulic plant B essentially comprises pumping means and pressure accumulating means.
The pumping means comprise two motor pumps, one being the normally working pump, called service pump, and the other an emergency pump, having a common delivery conduit 12. If, for any reason, the service pump ceases to work, the emergency pump is brought into action. These two motor pumps, each of which comprises an electric motor 9 and a constant delivery pump 10, draw oil from a reservoir 11 and deliver it into said conduit 12. The individual delivery lines of the two groups, and the common conduit 12, are provided with non-return valves 13'. An adjustably-loaded valve 14 limits the delivery pressure of the pumping means to a specific value P (for example 40 kg./cm.
The pressure accumulating means comprise a battery of accumulators each comprising a casing 15 enclosing a variable volume chamber 16 which is filled with gas under pressure (for example nitrogen). The spaces, designated by 17, left in the casings 15 on the outside of these chamatet bers 16 contain oil, and these spaces are connected in parallel to a conduit 18.
In this conduit 18 there is a valve 19 provided with a calibrated orifice 20 and urged by a spring 21 in a direction such that the flow of oil leaving the accumulators is slowed down by the said orifice, through which it is compelled to flow, whilst oil flowing toward the accumulators pushes back the valve 19 against its spring 21 and thus is not subjected to any braking.
The above mentioned conduits 12 and 18 are connected through a common conduit 22 to the group of control elements, such as C and C A switch, advantageously an electric switch 23, located at the control station D, can be controlled by the operator so that, in a first position thereof (in dotted lines in FIG. 3) corresponding to the actuation of the valves, the energizing circuit 24 of a solenoid valve 25 (FIG. 3) and the energizing circuit 26 of the motor of the service pump are fed with current and, in a second position corresponding to the holding of the valves in position, the energizing circuit of said valve 25 is no longer fed with current and a secondary energizing circuit 27 of the said motor 9 is fed with current.
The solenoid valve 25 is such that, when the switch 23 is in the above stated first position, the conduit 18 and the accumulator means 1516 are shut oti, the service pump 10 then delivering oil continuously and slowly into the conduit 22 at the pressure set by the loading of valve 14, and that, when the valve 23 is in the second position (illustrated by FIG. 3), the conduit 18 and the accumulator means 15-16 are connected to the control elements such as C and C through the conduit 22, the service pump 10 then intermittently feeding oil to the accumulator means 15-46 and to the control elements when the secondary energizing circuit 27 is in action.
This secondary energizing circuit is controlled by two pressure contacts 28 and 29 which are subjected to the pressure prevailing in the accumulator means, which is transmitted through a conduit 30, the contact 28 starting the service motor 9 when this pressure falls below a first limit value P (for example 25 kg./cm. and the contact 29 stopping this motor when this pressure exceeds a second and higher limit value P (30 kg./cm. for example), this second limit value being less than the loading pressure P of the valve 14.
A third pressure contact 31, which is loaded at a pressure P lower than P and is arranged in parallel with the two others, may be provided to actuate a visual or audible alarm signal at the control station D in case of the pressure in the accumulators dropping below the pressure for which the contact 28 is 'set as the result of a failure in the operation of the service motor pump. This alarm signal will warn the operator that he must bring the emergency motor pump into service.
Advantageously a hydraulic resistance 32, consisting for example of a coil of relatively narrow cross section, is provided in the conduit 30 to prevent pressure fluctuations from operating the contacts 28, 29 and 31.
The control elements, such as C and C each comprises a hydraulic slide valve 33 the sliding member 34 of which is operated by a lever 35. In one of the positions of this sliding member 34 (shown in solid lines in the case of element C the slide valve 33 connects the conduit 22, which is supplied with oil either at pressure P by the service pump 10 or at a pressure between P and P by the accumulator means, with the upper chamber 7 of the jack of the corresponding valve through a conduit 36, and it also connects the lower chamber 8 of this jack through a conduit 38 with a discharge conduit 37. In the other position of the sliding member 34 (which has been shown partially in solid lines in the case of the element C the slide valve 33 connects the conduit 22 to the lower chamber 8 of the jack through the conduit 38 and also connects the upper chamber 7 of the jack through a conduit 36 to the discharge conduit 37.
Of course, the location of the valves, such as A and A does not permit the use of electrical limit contacts or equivalent means actuated directly by the moving parts 2, 3, 4. of the valve for indicating correct operation of the valve, since the valves are disposed in the bottom of the holds several metres below the level of the crude oil therein.
I provide correct operation indicator means which may be arranged at any suitable place, in particular at the control station, advantageously by inserting a delivery meter in the discharge conduit 37. It will in fact be appreciated that oil is expelled from the jack into this discharge conduit, either from the jack upper chamber 7 when the valve is opened or from the lower chamber 8 when the valve is closed, only when the moving parts 2, 3, 4 are actually displaced in response to the actuation of the corresponding lever 35.
A delivery meter of this nature comprises a cylinder 39, a piston 40 movable therein, with calibrated orifices 41 extending from one side to the other of said piston, this piston being urged in the downward direction by a spring 42, the rod 43 of this piston passing through the wall of the cylinder 39.
In the conduits 38 connecting each slide valve 33 with the lower chamber 8 of the corresponding jack there is mounted a holding valve 44 which permits oil to flow from this chamber only when its pressure reaches or exceeds a predetermined limit value higher than that corresponding to the weight of the moving parts 2, 3. 4 of the valve, this holding valve being connected in parallel with a non-return valve 45 allowing the oil to flow in the opposite direction to that first mentioned, that is to say toward the chamber 8.
Advantageously the levers 35 are grouped in the control post D in a physical arrangement reproducing that of the valves A A A and A as diagrammatically illustrated in FIG. 2.
The installation above described operates as follows:
During the period of operation of one or more valves, the operator places the electrical switch 23 into the Operate position, the result of which is:
(l) The energizing of the solenoid valve 25, which shuts off the accumulator means -16.
(2) The starting of the service motor pump 9-10.
The operator can now make use of the full delivery from the service pump to open or close one or more valves, by moving the lever of the corresponding slide valve or slide valves 33.
The valve opening or closing operations being completed, the operator brings the switch 23 into the Hold position, and the effect of this is:
(l) to de-energize the solenoid valve 25 and, as a result, to bring the accumulators back into circuit,
(2) to place the motor pump under control of the pressure contacts 28 and 29.
The accumulators therefore maintain in the hydraulic circuit a pressure between the limits P and P corresponding respectively to the loading of the pressure contacts 28 and 29.
Thus the accumulators constantly hold the valves in the open or closed position, according to their own respective positions, as determined by the operations which have previously occurred.
If the pressure in the accumulators falls to P as a result of leakages in the system, the pressure contact 28 starts up the service motor pump and this starts charging the accumulators.
As soon as the pressure in the accumulators reaches P the pressure contact 29 stops the motor pump and the accumulators maintain the desired pressure in the circuit.
Two electrical occurrences are possible:
(1) The contact 28 may not start the motor pump charging group, so that the pressure in the accumulators keeps dropping below P (2) The contact 29 may not out 01f the supply current of the charging group, so that the pressure increases to P which is the calibrated pressure of the discharge valve 14.
In the first instance, that is to say if the accumulators are not charged despite the signal given by the pressure contact 28, when the pressure in the accumulators has dropped to P the pressure contact 31 will operate a visible or audible signal. The operator will thus be warned of the non-functioning of the service motor pump and will then be in a position to bring into operation the emergency motor pump, which in turn will charge the accumulators.
In the second instance, that is to say if the motor pump does not stop despite the fact that the pressure P is reached in the accumulators, the increase in pressure to the loading pressure P of the valve 14 illuminates a visible signal, for example through special pressure contact (not shown) which warns the operator of the danger of excessive heating of the oil. The operator will then intervene and stop the motor pump by means of an electric press button.
The non-return valves 13 shut 06 the accumulators from the motor pumps and from the discharge valve for the purpose of preventing possible leakage when the pumps are stopped during actual operation. The nonreturn valve 13 associated with the emergency group (at this time not in service) shuts off the latter.
When an operation is started, as soon as there is a movement of the piston 4 in the jack of the remotely controlled valve, the discharged liquid flows through the conduit 37 and meets a resistance during its passage through the calibrated orifices 41 of the piston 40 of the delivery meter 39. The pressure thus created on the side opposed to the spring 42 moves the piston upwardly, and the end of its rod 43 passes out of the body of the meter (into the position shown in dotted lines) and indicates to the operator that the oil is circulating, and thus that the movement of piston 4, and of the corresponding valve 2 is taking place.
As soon as the piston 4 stops, the oil no longer circulates and the spring 42 retracts the rod 43 of the delivery meter, signalling the end of the operation. The pressure in the circuit then rises to P which corresponds to the loading of the discharge valve 14 and is selected so as to ensure liquid tight closure of the remotely controlled valve.
The holding valve 44 balances the weight of the moving parts of the remotely controlled valve so that the moving part of the valve is positively actuated during the valve closing operation. The loading of valve 44 depends on the weight of the moving parts.
During the opening movement, the holding valve 44 is short circuited by the non-return valve 45 which enables oil to flow freely toward the piston 4 of the corresponding valve.
In a general manner, while I have, in the above description, disclosed what I deem to be practical and efficient embodiments of my invention, it should be well understood that I do not wish to be limited thereto as there might be changes made in the arrangement, dis-- position and form of the parts without departing from the principle of the present invention as comprehended within the scope of the accompanying claims.
What I claim is:
1. A hydraulic remote control system which comprises, in combination, a double acting hydraulic jack, said jack including parts forming two variable volume chambers, so that expansion of one of said chambers and retraction of the other corresponds to operation of said jack in one direction whereas retraction of said first mentioned chamber and expansion of the other corresponds to operation of said jack in the opposed direction, a conduit starting respectively from each of said two chambers, a source of power liquid under pressure, a feed pipe leading from said source, a discharge conduit, valve means interposed between said two first mentioned conduits, said feed pipe and said discharge conduit, said valve means being capable of connecting either of said two first mentioned conduits with said feed pipe and the other with said discharge conduit, and liquid flow indicator means inserted in said discharge conduit, said source of power liquid under pressure comprising pumping means having the delivery thereof in communication With said feed pipe, accumulator means, a connecting conduit between said feed pipe and the delivery of said accumulator means, a valve in said connecting conduit for opening and closing the communication between said feed pipe and said accumulator means, and electric motor for driving said pumping means, an electric circuit comprising a source of current for operating said motor, electromagnet means for controlling said valve arranged, when energized, to place said valve in the communication closing position, said valve being in the communication opening position when said electro-magnet means is not energized, .an electric circuit including a current source for energizing said electromagnetic means, said two electric circuits having a portion in common, and a switch in said electric circuit portion adapted, in a first position thereof, to be used to operate the hydraulic jack, to close both of said electric circuits and, in a second position thereof, to be used to keep said hydraulic jack in stationary position, to open both of said electric circuits.
2. A remote control installation according to claim 1 further including automatic control means to start said pumping means into operation when the pressure in said feed pipe is between two given values, said automatic means being placed under control of said switch mechanism to be operative only when said switch mechanism is in said second position.
References Cited in the file of this patent UNITED STATES PATENTS 1,616,841 Beebe Feb. 8, 1927 2,239,481 Chistensen Apr. 22, 1941 2,243,074 Anderson May 27, 1941 2,253,617 Grifiith Aug. 26, 1941 2,322,517 Hose June 22, 1943 2,632,999 Balton Mar. 31, 1953 2,665,122 Rowland Jan. 5, 1954 2,678,752 West May 18, 1954 2,748,569 Jackson June 5, 1956 2,839,895 Hemeon June 24, 1958 2,888,029 Govan May 26, 1959
US780698A 1957-12-27 1958-12-16 Remote control installations for the valves of marine tankers Expired - Lifetime US3018628A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3828555A (en) * 1971-03-24 1974-08-13 Giros J Power plant for various vehicles
US4209986A (en) * 1978-04-17 1980-07-01 Cunningham Robert F Method of and apparatus for auxiliary control of fluid operated steering apparatus for ships, boats and the like

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1616841A (en) * 1925-11-18 1927-02-08 Western Gas Construction Co Motor-operated gate valve
US2239481A (en) * 1938-05-04 1941-04-22 Christensen Alfredo Hiram Hunt Accumulator for liquids under pressure
US2243074A (en) * 1938-04-04 1941-05-27 Arnold N Anderson Indicator means
US2253617A (en) * 1941-08-26 Power transmission
US2322517A (en) * 1941-03-04 1943-06-22 Atwood & Morrill Co Inc Valve assembly
US2632999A (en) * 1952-01-30 1953-03-31 Stephen A Bucholtz Hydraulic system with an atmospheric pressure controlled accumulator
US2665122A (en) * 1952-06-11 1954-01-05 Ernest E Rowland Hydraulic power means and seal for pressure vessel agitators
US2678752A (en) * 1951-06-20 1954-05-18 West Elias Angelo Oil dispensing apparatus
US2748569A (en) * 1950-11-14 1956-06-05 Pittsburgh Des Moines Steel Controlling delivery of air to induction and blow down type wind tunnels
US2839895A (en) * 1956-05-08 1958-06-24 Gen Motors Corp Hydraulic driving apparatus
US2888029A (en) * 1956-05-23 1959-05-26 Jaroco Engineering Co Hydraulic system for control of a valve and follow-up indicator

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2253617A (en) * 1941-08-26 Power transmission
US1616841A (en) * 1925-11-18 1927-02-08 Western Gas Construction Co Motor-operated gate valve
US2243074A (en) * 1938-04-04 1941-05-27 Arnold N Anderson Indicator means
US2239481A (en) * 1938-05-04 1941-04-22 Christensen Alfredo Hiram Hunt Accumulator for liquids under pressure
US2322517A (en) * 1941-03-04 1943-06-22 Atwood & Morrill Co Inc Valve assembly
US2748569A (en) * 1950-11-14 1956-06-05 Pittsburgh Des Moines Steel Controlling delivery of air to induction and blow down type wind tunnels
US2678752A (en) * 1951-06-20 1954-05-18 West Elias Angelo Oil dispensing apparatus
US2632999A (en) * 1952-01-30 1953-03-31 Stephen A Bucholtz Hydraulic system with an atmospheric pressure controlled accumulator
US2665122A (en) * 1952-06-11 1954-01-05 Ernest E Rowland Hydraulic power means and seal for pressure vessel agitators
US2839895A (en) * 1956-05-08 1958-06-24 Gen Motors Corp Hydraulic driving apparatus
US2888029A (en) * 1956-05-23 1959-05-26 Jaroco Engineering Co Hydraulic system for control of a valve and follow-up indicator

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3828555A (en) * 1971-03-24 1974-08-13 Giros J Power plant for various vehicles
US4209986A (en) * 1978-04-17 1980-07-01 Cunningham Robert F Method of and apparatus for auxiliary control of fluid operated steering apparatus for ships, boats and the like

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