US2706999A

US2706999A - Doors or covers for pressure vessels

Info

Publication number: US2706999A
Application number: US278336A
Authority: US
Inventors: Pickard Henry Mauri Hattersley
Original assignee: Individual
Current assignee: Individual
Priority date: 1952-03-25
Filing date: 1952-03-25
Publication date: 1955-04-26
Anticipated expiration: 1972-04-26

Description

April 26, 1955 H. M. H. PICKARD DOORS OR COVERS FOR PRESSURE VESSELS Filed March 25, 1952 2 Sheets-Sheet l mWE V 1% 02% P/. CAM

United States Patent OfiFice 2,706,999

Patented Apr. 26, 1955 2,706,999 tion so that the valve cannot be opebnedhsince the handle 12 is revented from bein turned t e en a ement DOORS OR COVERS FOR PRESSURE VESSELS of the 19 with the Plat 2 y g g Henry Maurice Hattersley Pickard, Leeds, England 1 278 336 be opened by rotation of the handle 12, the piston 19 Apphcamm March 1952 Sena 0 10 passing through the aperture 24 in the plate 22.

5 Claims. (Cl. 137-584) The embodiment illustrated in Figures 4-6 is the This invention relates to doors or covers for pressure a li k 26 being fitt d t a Square b 27 on h valve vessels, Such as kiers, autoclaves, k s, pa spindle. The link 26 is pivotal y connected at 28 to the ising P and the like, of the kind described In Brltlsh connecting rod 17, the construction being otherwise the Specification N0 wherein a Series Of PIVOted same as described with reference to Figures l-3 When latches disposed around the mouth of the v ss l ar the handle 12 is in the position shown in full lines, the adapted by partial movem nt f a i g to be swung Into 2 door is fully locked, the piston 19 has passed through and out of the operative position to allow the door to the aperture 24 in the plate 22 and the valve is in be positioned and locked, the ring being mounted for position to admit fiuid under pressure to the interior of rotational movement around the mouthpiece of the vesthe vessel. With the handle 12 in the position shown sel. in dotted lines, the door is not yet in the fully locked In said specification there is described and claimed a 2' condition, so that the piston 19 is out of alignment with positively acting safety device in the form of a relief valve the aperture 24 in the plate 22, with the: result that the for a slight pressure to be built up inside the vessel if the t ird port of the three-way valve 25. If desired, similar a slight pressure of only a pound or two may give rise a three-way valve is of advantage in preventing even a to a considerable load on a large door. very small piessure being built up inside the vessel due e principal ObJeCt of the present invention is to for example to leaky interior steam heating pipes or the prevent such loads being built up on the (1001 small pressure caused by the hot vessel warming up cold According to the invention, in a door or cover of the air trapped in the vessel when the door is closed. kind described, a valve controlling the supply of fluid I Iaim; under pressure to the interior of a vessel is associated 1. In a pressure vessel of the kind comprising a cover,

with the actuating ring in such manner that the valve pivotally mounted about a lateral hinge axis a series of cannot be opened to admit fluid under pressure to the pivoted latches disposed around the mouth of the vessel,

interior of the vessel until the door or cover has been and a ring mounted for rotational movement around the fully locked. mouth of the vessel to swing said latches into and out of According to the preferred embodiment, the said valve position to allow the cover to be locked after being swung is link-connected with a rod or piston in such manner into the closed position about said lateral hinge axis, the that the valve cannot be opened until said rod or piston combination of a valve controlling the supply of fluid has passed through an aperture in a plate rigidly assounder piessure to the interior of the vessel, a plate rigidly ciated with the actuating ring the ariangement being such associated with said ring, said plate having an aperture t at such passage of the rod or piston cannot occur until 1 crew, a rod slidably mounted so as to be capable of the actuating ring has assumed a position corresponding passing through said aperture when in alignment thereto the fully locked condition of the door or cover with, and a link pivotally connected between said valve e invention will now be desciibed with reference and said rod said rod being in alignment with said aperto the accompanying drawings, wherein ture when said ring has assumed a position corresponding Figure l is a perspective view of one form of the to the fully locked condition of the cover, and said valve invention with the inlet valve closed, being in the open position only after said rod has been Figure 2 is a corresponding view with the inlet valve passed through said aperture. open, 2. In a pressure vessel of the kind comprising a cover, Figure 3 is a diagrammatic corresponding end view, pivotally mounted about a lateral hinge axis, a series of and pivoted latches disposed around the mouth of the vessel, Figures 4-6 are corresponding elevation, plan and end 39 and a ring mounted for rotational movement around the views of another embodiment. mouth of the vessel to swing said latches into and out of Referring first to Figures 1-3, there is shown a door of position to allow the cover to be locked after lbeing swung the kind described in specification No 412,700 and havinto the closed position about said lateral hinge axis, the ing associated theiewith a safety device of the kind decombination of a valve controlling the supply of fluid scribed therein, said safety device incorporating a relief :5 under pressure to the interior of the vessel, a plate rigidly valve A and operating mechanism B therefor. Such a associated with said ring, said plate having an aperture safety device forms no part of the present invention therein, a sleeve fixed to said vessel adjacent its mouth, a although it is to be understood that it may be provided rod slidably mounted in said sleeve so as to be capable of in addition to the safety device now to be described passing through said aperture when in alignment there- A valve 10 is provided in the pressure fluid inlet line wit and a link pivotally connected between said valve 1, said valve being provided with an actuating handle 12, and said rod said rod being in alignment with said aperwhich extends radially from a cowling 13 which is roture when said ring has assumed a position corresponding tatably supported by a bracket 14 secured to the wall of to the fully locked condition of the cover, and said valve the vessel. A link 15 is secured to the lower end of the being in the open position only after said rod has been cowling 13 and said link is pivotally connected at 16 to 7 passed through said aperture. a connecting rod 17 the other end of which is pivotally 3. A cover according to claim 1, wherein said valve connected at 18 to a piston 19 which slides in a sleeve is a three-way valve which, when not in position to admit 20 carried by a plate 21 fixed to the mouthpiece of the fluid to the interior of the Vessel, places said interior in vessel. A plate 22 is secured to the actuating ring 23 communication with the atmosphere.

of the door, the plate 22 having an aperture 24 therein 0 4. A pressure vessel having a mouth, a cover for said through which the piston 19 may pass when the ring mouth pivotally mounted about a lateral hinge axis, a

series of pivoted latches disposed around said mouth, a ring mounted for rotational movement around said mouth to swing said latches into and out of position to allow the cover to be locked after being swung into the closed position about said lateral hinge axis, a valve controlling the supply of fiuid under pressure to the interior of the vessel, 21 plate rigidly associated with said ring, said plate having an aperture therein, a rod slidably mounted so as to be capable of passing through said aperture when in alignment therewith, and a link pivotally connected between said valve and said rod, said rod being in alignment with said aperture when said ring has assumed a the fully locked condition of the cover, and said valve being in the open position only after said rod has been passed through said aperture.

5. A pressure vessel having a mouth, a cover for said mouth pivotally mounted about a lateral hinge axis, a series of pivoted latches disposed around said mouth, a ring mounted for rotational movement around said mouth to swing said latches into and out of position to allow the cover to be locked after being swung into the closed position about said lateral hinge axis, a valve controlling the supply of fluid under pressure to the interior of the vessel, a plate rigidly associated with said ring, said plate having an aperture therein, a sleeve fixed to said vessel adjacent its mouth, a rod slidably mounted in said sleeve so as to be capable of passing through said aperture when in alignment therewith, and a link pivotally connected between said valve and said rod, said rod being irr alignment with said aperture when said ring has assumed a position corresponding to the fully locked condition of the cover, and said valve being in the open position only after said rod has been passed through said aperture.

Ahrens Oct. 9, 1923 Nelson Mar. 26, 1940