Патент USA US2405439код для вставки
Aug, 6', 1946., . I. LUBEQCK ET AL ' 2945943 EXPLOSIVE OPERATED VALVE ' ‘Filed Nov. 6, 1942 jgj. 2 Sheets-Sheet l All. 6,‘ 1946. l, LUBBOCK ET AL Z?-AQ EXPLOSIVE OPERATEDVALVE Filed NOV. 6, 1942 2 Sheets-Sheet 2 Patented Aug. 6, 1946 2,405,439 "UNITED ' STATES Parent‘ “OFFICE ~ 2,405,439 EXPLOSIVE OPERATED VALVE Isaac Lubbock, Geo?rey Joseph Gollin, Allan Lindsay, and Harold James Poole, London, Eng land; said Lubbock, Gollin, and Lindsay assign ors to The Asiatic Petroleum Company, Limited,‘ . London, England Application ‘November 6, 1942, Serial ‘No. 464,832 _ In Great Britain November 7, 1941 7 Claims. 1 (Cl. 137-139) , ' _ ' , ' According to this invention, a valve which will the hole and does not project laterally from the open practically instantaneously is provided by employing an explosive charge to create pressure outer wall of the anvil. above a piston linked with or forming part of a ed to move over the outer wall of the anvil and is formed with a recessed portion l8 which, as valve member preferably of the poppet type. The valve is adapted to remain open after it has moved to the open position by providing an auto matic retaining device. _ Various features of the invention embodied in carrying it into practice will be hereinafter de 10 scribed and claimed. I _ The invention is illustrated by way of examples in the accompanying'drawings, of which Figure 1 is a sectional elevation of the valve in the closed position; Figure 2 is a detail in the same view showing the valve in the open position; and Fig ure 3 shows a modi?ed form of device for auto matically retaining the valve in the open posi tion. Referring to the drawings, I represents the ex plosive charge, which is of the solid type and which is operated electrically by a usual form of resistance bridge, but it will be understood that it might also be operated through a percussion or friction cap. The'explosive charge is shown as being introduced as a cartridge ?tted into the head of the valve body above the movable valve member which comprises a stem 2 carrying a piston 3 at the top end and a poppet 4 toward its lower end. The piston slides in the valve body 5 which is suitably machined to provide a bear ing for the piston and a seating for the poppet. It will be understood that the principle of con struction is unaltered if the valve is horizontal, or inclined, or operated upwards. The port 6 is provided at the bottom for the inlet of ?uid whilst a transverse port 1 is pro vided for the outlet of ?uid when the valve is opened. It will be seen from Figure 2 that these ports are in communication with each other when the valve is open. The means for retaining the movable valve member in the open‘position after the explosive charge has been ?red and has driven down the piston comprises, as shown in Figure 1, a lock ing device operated by pressure transmitted by solid material subjected to a blow from a ham mer carried by the valve member. This ham 1, A skirt I‘! attached to the valve stem, is adapt shown in Figure 2, is opposite to the bolts or snugs when the valve is opened and the soft metal in the anvil has been struck by the ham mer. ; The pressure engendered in the soft metal when it is so struck, is transmitted to the bolts or snugs, ‘causing them to emerge from, their 15 holes in the outer wall of the anvil and to enterv into the recessed portion of the skirt carried by the'valve stem. , I r I ' ‘ _ It will be seen that the recessed portion in the skirt is provided to form on the end of the] skirt a ?ange l9 which is a reasonably close'?t over the outerv wall of the anvil, the skirt proper being 20 of such internal diameter as to allow the bolt or snug to be moved an appreciable distance beyond the Wall of the anvil and to lie partly within the wall of the anvil and partly outside when caused to emerge by the pressure transmitted from, the 25 soft metal. v The valve is particularly suitable for use in‘ connection with the passage of gas under very high pressure, for example for releasing high pressure gas from a storage cylinder for the pur-_ 30 pose of impelling combustion ingredients to noz zles in a combustion chamber. An example of this is in'connection with jet propulsion appa ratus where inert gas at high pressure may be used to drive liquid fuel and liquid oxidant to a burning nozzle in the combustion chamber. When the valve is employed with ?uid at very high pressure it is important that no leakage should pass the valve seat whilst the valve is nominally considered closed. Accordingly there is shown in the drawings a shearing plate or disc [2 which is made for example of aluminium and which is sheared by the valve member on its opening movement. In Figure 2 this disc is shown to have been sheared. In operation, when the explosive charge has been ?red the piston on the valve stem is driven downwardly and uncovers a pressure relief vent H. The shearing disc is ruptured, and the valve mer, which is indicated by the reference numeral 50 stem moves at a high velocity until its hammer enters the soft metal in the anvil. By this time l5, strikes a body of soft metal l3 contained in the ?ange on the skirt has moved beyond the the steel cylindrical anvil M. The cylindrical holes in the outer wall of the anvil in which the wall of the anvil I4 is pierced with holes in each bolts or snugs are situated, so that when the of which is free to slide a bolt or snug 16 which, hammer has entered the soft metal in the anvil as shown in Figure 1, is normally contained in 65 and has engendered a high pressure therein, the 2,405,439 3 bolts or snugs are extruded until they come up against the wall of the skirt proper as shown in Figure 2. The valve stem under the in?uence of the high pressure gas would tend to move back towards the closed position, but the internal ?ange on the skirt comes up against the ex , truded steel bolts or snugs which prevents fur ther movement of the valve towards the closed position. In the original ?lling of the anvil with soft metal a sleeve may be provided to slide over the outside of the anvil so that the ends of the bolts or snugs can be held flush with the outside of 4 means, said valve carrying a part which will strike said body of metal when the valve opens. 3. An explosive operated valve comprising an anvil containing soft metal, a detent located in a transverse hole in said anvil communicating with the soft metal, a hammer carried by the valve which is adapted to strike the soft metal when the valve opens, and a part carried by the valve and adapted to present a recess opposite to the detent after the soft metal has been struck. 4. An explosive operated valve as claimed inv claim 3, in which the said part carried by the valve is invthe form of a skirt moving about the outside of the anvil when the valve is opening. the anvil casing whilst it is being ‘?lled with 5. An explosive operated valve as claimed in molten soft metal. The inner ends of the bolts 15 claim 3,.in which the said part carried by the or snugs may be curved or otherwise shaped to When the metal valve is in the form of a skirt provided with a ?ange which moves about the outside of the has cooled the snugs are held in this position by anvil to a vposition beyond the detent when the enable the soft metal, when set, to gain a posi- . tive hold on the bolts or snugs. the adhesion of the soft metal, and one can then 20 valvehas opened, so that when the valve tends to close the'detent has been extruded to a recess either dispose of the sleeve or arrange for it to above the flange whereby the valve is prevented be pushed to a position beyond the bolt or snug holes by the downward movement of the ?anged skirt carried by the valve stem. Such a sleeve is shown at 20 in Figure 1. In the modi?ed form of automatic valve retain from closing. ing means shown in Figure 3, spring controlled the anvil when the valve is opening, a sleeve be ing ?tted around the anvil opposite to the detent and being adapted to be moved away from that position by the skirt carried by the valve. snugs are provided which operate directly upon the valve stem. Thusthe snug 8 urged by the spring l0‘ normally bears against the part 2| of the piston but when the valve has opened the snug comes opposite to the recessed portion 9 in the piston and aceordingly'mo'ves into that re cess under the force of the spring. When the snug has ‘entered the recessed portion it is clear 35 ‘ 6. An explosive operated valve as claimed in claim 3, in which the said part carried by the valve is in the form of a skirt which moves about 7. An explosive operated valve of the poppet type comprising a valve body having a valve seat, a ?uid inlet to'a space below the seat, and a ?uid outlet'communicating with a space above the seat, a valve cooperating with the seat, an operating piston for'the valve subjected to the explosive force, a shearable sealingmember form ing a seal between the inlet and outlet passages What we claim is: . and adapted to be ruptured when the valve is 1. An explosive operated valve comprising de tent means adapted when operated to engage a 40 moved to open position by the explosive force, detent means adapted to engage and hold the part of the valve, and a body of solid material valve open, a deformable body adapted when de adapted when struck to flow and operate said formed to operate said detent means, and means detent means, and means operating when the engaging and deforming said body when the valve valve opens to strike said body of solid mate that the valve is prevented from returning to the closedposition. rial. ' ' ' 2. An explosive operated valve comprising de tent means adapted when operated to engage a part of the valve, and a body of soft metal adapt ed when struck to flow and operate said detent opens. . ' . ' . ISAAC LUBBOCK. GEOFFREY JOSEPH GOLLIN. ALLAN LINDSAY. HAROLD. JAMES POOLE. . ' '