JP4636688B2 - Isolation gate valve assembly - Google Patents

Description

[0001]
Related applications
  This application is a U.S. patent filed on Jul. 2, 1999, which is a continuation of U.S. patent application Ser. No. 09 / 133,573, each received a gas cartridge driven isolation valve on Aug. 13, 1998. This is a continuation-in-part of application number 09 / 133,573.
[0002]
  [Background of the invention]
  Field of Invention
  The present invention is an improved gate that is used commercially in connection with chemical processes, etc. that may experience dangerous situations or abnormalities that require the valve to be activated quickly to prevent catastrophic failure. Valve deviceIs an isolation gate valve assemblyAbout. More specifically, the present invention provides:Gate valveA gate valve that generates a gas propulsion force with a subsonic flow velocity to move the chamber quickly and smoothlymemberActuating actuator was givenGas cartridge drive isolationGate valveassemblyAbout.In the present invention, the gateGate valve in relation to valve membermemberA structure that slows down is also provided.
[0003]
  [Conventional technology]
  In order to quickly shut down the reactor in the event of a dangerous situation, the chemical reactor has been provided with an isolated gate valve. In general,Such a gate valve isIts insideGive a passage throughValve bodyIncludingValve bodyMoveable inside, perforated gatevalveMember exists and gatevalveMembers are,Normal,GateLocated in the valve open position allowing flow through the valve. If a dangerous situation is detected,GateThe valve member moves to a valve closing position that blocks the flow.
[0004]
  The actuators associated with conventional gate valves include mechanical linkages that are actuated by, for example, motors or solenoids. However, in some instances, conventional actuators are not able to actuate the gate valve fast enough to prevent the propagation of flames, and the flames actually pass through the gates, causing explosions and other critical A malfunction occurred. Further, in certain situations, it is desirable to prevent the possibility of electrical sparks being generated at the motor that operates the gate valve assembly.
[0005]
  U.S. Pat. No. 3,358,961, December 19, 1967, presents another type of gate valve for pressure relief in a fluid flow system. In this example,Valve bodyIn order to move the valve from the normally closed position to the fully opened position, the sliding valve is actuated by an explosive loaded fuel that produces a supersonic shock wave. Shutter-type valves are only useful for relatively small orifice applications, including limited size valve assemblies.Valve bodyThe associated shutter plate and piston assembly are small enough to prevent damage to the valve components as a result of shock waves generated by the activation of the explosive device or inertia due to the collision of the shutter plate and housing assembly when the valve is closed. It is necessary to be.
[0006]
  Accordingly, there is a need for an improved gate valve assembly technique that prevents the problems of conventional valve actuators, and a corresponding gate valve drive method.
[0007]
  Summary of the Invention
  The present invention,The most useful type of generally functioning to close the passage at start-up or to open the passageisolationGate valveassemblyIt is. In general, a gate valve that closes or opens as the gate movesmemberThe opening is substantially the same size as the cross section of the passage. For example, the passage is0.203m in diameter (8 inches)Gate valve if defined in the pipememberThe diameter of the opening of0.203m (8 inches)It is.
[0008]
  In the present invention, the opening is0.0508m in diameter (From 2 inches)0.610m (24 inches)Improved especially useful for wide size gate valves up toisolationA gate valve assembly is provided.Of the present inventionisolationGatevalveassemblyIs the diameter0.152m (6 inches)It is particularly useful for larger applications including these pipes.
[0009]
  In common with conventional gate valves,isolationThe gate valve assemblyIts insideGive a passage throughValve bodyAnd close to the passage,GateThe opening of the valve memberOf the valve bodyGate from the valve open position in line with the passagevalvePerforated gate that can be moved to the valve closing position where the opening of the member does not match the passagevalveIncluding a gate unit including members. The improved actuator of the present invention comprises a gatevalveThe members are preset and controlled from position to position, ie from the valve closed position.valveFrom open position or valve open positionvalveActs as a quick move to the closed position, gatevalveMember isvalveOpen position orvalveIt has a component that controls to decelerate in a preset manner when approaching the closed position. Gas generating cartridge that generates supersonic thrust by pressurized gas to selectively open or close the gate valve when neededunitIs given. GatevalveDepending on the size of the gate valve, the member is within a preferred range with respect to its movement so that the time for the larger pipe is longer,5.08-8.38m / sec (0.2-0.33 inch / msec)To such a pressurized gas at a rate of If the valve closes significantly faster, the gate valvememberCan cause damage to the valve components due to collisions with the housing, and slow valve closure cannot prevent flame fronts and explosive gas generation from propagating from sources to unprotected areas .
[0010]
  In a preferred embodiment, the actuator is a cylinder.ShapeUzing andCylindricalMoveable in the housingWith an elongated piston rodpistonWhenIncludingThe piston rod is connected between the piston and the gate valve member. Gas generation cartridgeunitThe piston andGas generationcartridgeunitAnd is coupled to the cylindrical housing at a position defining a stretchable and pressurized gas receiving chamber. The gas generation cartridge unit provides supersonic propulsion for pressurized gas.TubularIn the housing,pistonLeading towards the surface of the piston away from the rod, therebyTubularMove the piston in the housing and the corresponding gatevalveMove members.
[0011]
  A preferred gas generating cartridge unit has an opening,TubularThe shape of an elongated cartridge body arranged in a transverse or linear relationship with the housing, the cartridgeBodyHas an amount of ignitable solid propellant that ignites and burns at a controlled rate to generate a pressurized combustion gas product at a rate not exceeding about Mach 1 flowing into the chamber. Appropriate ignition devices and wire structures extend from the chamber and are functionally associated with the propellant to ignite the propellant. Depending on the needs of a particular application, either a single or multiple gas generating cartridge units may be used.
[0012]
  Gate valvememberButvalveWhen reaching the closed position, give a controlled deceleration and therebyGatevalvememberPrevent collisions,Valve bodyIn order to protect against undesired shock waves that are guided by themselves into the valve housing, the buffer unit ismemberAt the position where it engages,Valve bodyAssociated with. diameter0.203m (8 inches)Of the present invention intended for use in the following pipesisolationIn the case of the gate valve assembly, the buffer unit may be an elastic member having a preset buffer characteristic. diameter0.254m (10 inches)Use with more pipesisolationGate valveassembly(Gate valve device)Then, a preferable buffer unit is a honeycomb cell-like structure, and is controlled so that the force applied to the structure is received in the axial direction of the cell and contracted by the force.
[0013]
  Isolation gate valve according to the present inventionassemblyWas found to be inexpensive, safe and quick to start the valve, and sometimes not as dangerous as prior art actuators.
[0014]
  Detailed Description of the Preferred Embodiment
  Drawings, especially FIGS.Figure4, according to the present inventionisolationOne form of gate valve assembly is indicated by the numeral 10 in these drawings.Isolation gateValve assembly(Hereinafter also simply referred to as valve assembly)10 isIts insideGives a flow passage 14 throughValve body12,Valve body 12HowdinWithinWidely including a gate unit 16 ofGateUnit 16 is,Movable, perforated plate gatevalveIt has a member 18. Actuator 20,Also,valveGas generating cartridge or unit forming part of assembly 10(Hereafter, it is also simply called a cartridge)22 is included.
[0015]
  More specifically,Valve body12 includes a pair of spaced apart rectangular rectangular stud interference plates 24, 26 that each have a relatively large circular opening 29 and cooperate to define a vertical interior chamber 28.Stud interferencePlates 24 and 26,Steel liners 30 and 32 (preferably,10 gauge steel(Thickness is about 3.43 mm (0.135 inch) steel, about 3.51 mm (0.138 inch) galvanized steel, or about 3.56 mm (0.140 inch) stainless steel)).Stud interferencePlates 24 and 26 are joined together using edge couplers 34 that extend to side walls 37. In addition, the side wall 37, the top plate 36 and the bottom plate 38 are connected via a connector 40.Stud interferenceMounted on the upper and lower ends or side walls 37 of the plates 24,26. The pair of annular flanges 42 and 44 are designed to coincide with the piping flanges 42a and 44a shown by broken lines in FIGS. Threaded studs 46 on each sideValve body12 to connect the flanges 42, 42a, 44, 44a.RingThe flanges 42 and 44 are,Each is provided with an innermost circular seal ring 48, 50 (FIG. 3,Figure4reference).
[0016]
  The gate unit 16internalLocated in chamber 28,internalChamber28Made of slender, vertical metal designed to move up and down insideofGatevalveIncludes member 18. As shown,Gate valveMember 18 penetrates thereStud interferenceBoard24, 26And the circular opening 52 having the same size as the opening 29 and the passage 14. For those skilled in the art, the gatevalveThe member 18 has a valve open position (FIG. 3) in which the opening 52 coincides with the passage 14.reference) And the gatevalveA valve closing position (FIG. 4) in which the member 18 moves downward in the passage 28 and the opening 52 does not coincide with the passage 14 so that the flow to the passage is blocked.referenceIt is appropriate to be able to move between
[0017]
  The actuator 20 has a vertical hole 59haveBase 58And an annular upper fixture 60Vertical cylinderofA piston cylinder 56 is included. The base 58 is connected via a screw 62TopFixed to the plate 36,pistonThe upper fixture 60 above the upper end of the cylinder 56 is attached to the base 58 using a long shank connector 64. A set of conventional venting mufflers 66 communicating with the holes 59 are screwed to the base 58. The upper fixture 60 is a cartridgeThe 2Threaded hole designed to receive 2(Hereafter, simply called screw hole)68.pistonCylinder 56, base 58, and upper fixture 60 cooperate in the interiorofA piston chamber 70 is defined. The elongated piston rod 71 is a gatevalveFixed to the upper end of member 1859InsidepistonIt extends into the chamber 70. As shown, the annular piston 72 ispistonFixed to the top end of rod 71;pistonIt can slide in the chamber 70.
[0018]
  The gas generating cartridge or unit 22 isTopOf the fixture 60screwIt is screwed into the hole 68 and is shown in detail in FIG. In particular, the cartridge 22screwCylindrical outlet portion that is threaded on the outside to be received in hole 6874And has an inner thread 75, an intermediate part 76 having an annular thread, an intermediate annular body part 78 and a last end part 80. As shown, the intermediate part 76 isExitScrewed to the rear end of part 74, the shoulder82give. Body parts78The front end has a complementary shoulder 84 adjacent to the shoulder 82. A threaded annular clamp 86 serves to secure the body part 78 near the intermediate part 76. The rear end of the intermediate piece 78 is threaded as shown and receives the front end of the end piece 80. As such, element 74~80 cooperate to form an elongated cylindrical cartridge that defines an internal chamber 88.cartridgeYou can see that it defines the body.
[0019]
  A cylindrical propellant body 90 having an elongated cylindrical extension 92 having an external thread is received in the chamber 88 and is connected to the outlet portion 74.internalIt is fixed with screw 75. PropellantBody90Includes a solid propellant 94, which is preferably a granular smokeless explosive. Conveniently,SmokelessGunpowder,A conventional composition consisting of a mixture of potassium perchlorate, nitroglycerin, nitrocellulose and lead thiocyanate with a minimum autoignition temperature of about163 ° C (325 ° F)The US Department of Transportation (DOT) classification is 1.4s and the United Nations (UN) classification is 0323. The smokeless gunpowder is suitable for generating a combustion gas product for operating the valve assembly 10 described below. The front end of the extension portion 92 is attached to a commercially available sealing plate 96.SealingThe plate 96 is preferably a cartridge.The 2In order to prevent the smokeless powder loaded fuel from being exposed to the atmosphere during supply and storage of 2, it consists of a thin annular plastic or resin element.
[0020]
  The ignition plate 98 issolidIn contact with the propellant 94PropellantIt is located inside the main body 90.IgnitionBoard98Is,Preferably, it is comprised with the ignition composition which consists mainly of potassium chlorate. Two sets of ignition wires 100 and 102, IgnitionIt is functionally connected to the plate 98 and extends rearward from the cartridge body as shown. A cylindrical wire guide 104 having an inner liner 106 is:PropellantIt is screwed to the rear end of the main body 90. Each pair of ignition wiresIgnitionIt consists of two metal bridge wire elements that connect to the rear face of the plate 98. This preferred embodiment is a design for a retrofit part. Note that the design for the new installation may be slightly different.
[0021]
  Referring to FIGS. 1, 3 and 4 of the drawings, the broad buffer unit 99 is a slidable gate.valvemember18And directly placed on a straight line and the gatevalvemember18Is held by the bottom plate 38 in an arrangement that directly engages the lower end of the plate. Shown in Figure 111 and FIG.2 Buffer unit shown in more detail99Embodiment of the hexagonal cell103Vertical axis of the gatevalveIt consists of honeycomb cell-like elements 101 arranged so as to extend in parallel with the path of the sliding movement of the member 18. In a preferred embodiment,Hexagoncell103Is,thickness0.000254m (0.010 inch)Made of stainless steel 304. Individual cells103The distance from one side to the opposite side is about0.00318m (1/8 inch)It is.HoneycombThe height and width of the cellular element 101 are preferably each0.0254m (1 inch)And the length is,Gate of specific size gate valve devicevalveDepends on the member's width. The buffer unit 99 has a diameter0.254m (10 inches)For more pipingValve assemblyAre preferably used.
[0022]
  Another buffer unit 299 is shown in FIG. 10 of the drawings. The buffer unit 299 has a height and width of about0.0254m (1 inch)It is desirable that the length is specificValve assemblyThe gatevalveIt consists of an elastic element 301 comprising an elastomeric strip equal to the transverse dimension of the member 18. preferableElasticityElement 301 is made of neoprene having a Shore A hardness of about 60-70.
[0023]
  Details of a preferred type of gas generating cartridge or unit are shown in US Pat. No. 5,718,294, which is hereby incorporated by reference.
[0024]
  When the valve assembly 10 is used, the gatevalveMember 18 is usuallyGateValve member183 is in the valve open position shown in FIG. 3 with the opening 52 coinciding with the passage 14 and the piston 72 at the top slightly below the upper fixture 60. When placing such a sealring48 and 50 are fluidValve body 12ofinternalThe passage through the chamber 28 is prevented. If a danger is detected by a sensor (not shown),IgnitionTo activate the plate 98,ArrivalAn appropriate current is introduced to the fire wires 100 and 102. As a result, the propellant 94 is quickly ignited and a high-temperature combustion product is generated. This is initially above the piston 72TopPressure is generated in the fixture 60. As a result, as shown in FIG.pistonDriven quickly down in the cylinder 56,Gate valvemember18Moves in the same manner until the communication between the opening 52 and the passage 14 is completely removed, thereby closing the passage 14 and preventing further fluid inflow.
[0025]
  The cartridge or unit 22 has its composition, burning rate and quantity as a gate valvemember18 toward its closed position5.08-8.38m / sec (0.2-0.33 inch / msec)A gas generating propellant in a relationship that produces a volume of subsonic gas sufficient to move at a speed of Stated another way, the propellant loading is determined by the gate valve when moving.memberThe speed profile per size dimension of the gate valvememberFrom the fully open position to the fully closed positionvalveIt has characteristics that meet the criteria of moving at a speed of about 3-5 msec per inch diameter of the pipe to which the assembly is attached. That way, for example,Valve assemblyIs the diameter0.254m (10 inches)Intended for use in pipingIsIn this case, the closing time of the gate valve member 18 is not less than 30 msec and less than 50 msec.
[0026]
  The controlled acceleration of the gate valve member 18 when opened causes the gate valve member 18 toIn the valve body 12Prevent collision with sufficient force to cause damage to the elements in the housing,Of the valve body 12Aperture29The degree that can be opened againInPrevent rebounding. Of the present inventionValve assemblyIn an example where is used in explosion isolation equipment,GatePrevention of reopening of the valve member 18 is particularly important.Valve assemblyWhen piping fitted with pipes leads to areas where explosions may occur, the adverse events that need to be avoided are that the valve did not close fast enough so that flames and combustion products could be generated before the valve closed. This includes proceeding through the valve and, due to the valve being reopened to some extent, flame and combustion product leaks occur through the valve to be fully closed.
[0027]
  The specific size depends on the diameter of the pipe to which the device is attached.Valve assemblyWhen the gate valve member 18 reaches the fully closed position, the buffer unit 99 or 299 ofValve assemblyThis contributes to preventing harmful impact forces from being distributed to the housing. Buffer unit 99 or 299 and gate valveMember 18The engagement of the gate valve member in a preset and controlled manner18The movement of the gate valve member 18 to prevent the impact force from causing damage to the housing from the gate valve member 18 when closed,29Gate valve to the extent that it can be reopenedMember 18To prevent splashing.
[0028]
  In the case of the buffer unit 299 having elasticity,This bufferunit299Has the property of achieving complete and quick deceleration of the gate member 18,BufferIf the unit 299 is not so elastic, the gate valve member 18 tends to bounce once or several times, leaving the fully closed position. The preferred neoprene material used in the manufacture of the shock absorber unit 299 has a Shore A hardness of about 60-70 and provides a smooth and substantially non-bounce buffer when the gate valve member 18 moves toward the closed position. It became clear to give.
[0029]
  Gate valve device designed for use in pipes with a diameter of 10 inches or more orvalveIn the assembly 10, the honeycomb cellular structure 101 shown in FIGS.Honeycomb cellIn the structure 101, the axis of each cell 103 is arranged in parallel with the movement path of the gate valve member 18 when closing. The engagement between the gate valve member 18 and the adjacent surface of the honeycomb structure is a cell103Is actively contracted in a controlled manner, thereby providing a controlled positive deceleration of the gate valve member 18.
[0030]
  In FIG. 5, the upper fixture 60a is shown in FIG.The 22a, cartridge22aThe piston rod 71a and below itGate valveExcept for the fact that the member (not shown) is arranged substantially vertically on the linear axisvalveAn improved valve assembly 10a that is identical to assembly 10 is shown. so,TopThe fixture 60a ispistonA bottom plug portion 104 having a thread on the cylinder 56a is included. plugportion104 is a cartridge.The 2There is a threaded hole 106 inside that receives the extension 92a with 2a thread. The metal cup-shaped cover 108 isplugIt is fixed to the portion 104 and has a small opening 110 for passage of the ignition wires 100a, 102a on the upper wall surface. For easy understanding,valveThe operation of assembly 10a is identical in all respects to that described for valve assembly 10.
[0031]
  FIG. 6 shows another embodiment of the valve assembly 10b. In this case, the cylindrical upper fixture 112 isPiston cylinderFunctionally attached to the upper end of 56b. A yoke coupler 114 having a cylindrical mounting portion 116 with external threads isTopReceived within the threaded hole 118 of the fixture 112. yokeAs described above, the coupler 114 includes a pair of branched cylindrical arms 120 and 122 each corresponding to the outlet portion 74. The remaining elements of the cartridge body are each functionally secured to the arms 120, 122. In other words, the switching component 76b, the intermediate component 78b, and the end component 80b each form a chamber 88b that receives the propellant. The same propellant body 90b is placed inside each chamber 88b, and its extension 92b isarmScrewed into the holes 120 and 122.
[0032]
  During use of the assembly 10b, the propellant loaded fuel within the individual body 90b ignites simultaneously, thereby allowing the combustion gas products from these loaded fuel to pass downwardly through the yoke coupler 114, causing the piston 72b to pass.Piston cylinderDrive downward in 56b. As stated, this of course related gatevalveMembers also move.
[0033]
  7 is another embodiment of the present invention that is similar in many respects to that shown in FIG.Valve assembly124 is shown. That is, the valve 124 isValve body12 and the same as the gate unit 16Valve body126 and a gate unit 128. In this case, the actuator 130 is similar to the actuator 20, but the gateunit128 is arranged on a linear axis. In addition, the actuator130The adapter 132 having a thread is attached to the outside which is received inside the boss having a corresponding thread. An elongated portion 136 having an elongated cylindrical thread is received within the adapter 132 as shown and is tubular.FixtureA hollow metal housing 138 having 140, 142 is held. An ignition wire 144 associated with the actuator 130 extends through the adapter 132 and extension 136 to the confinement portion of the housing 138. These wires then extend through fixtures 140, 142 for proper connection to the required sensors and power sources. As will be readily apparent from the study of FIG. 7, the remaining structure of the actuator 130 and the entire valveassembly124 is the same as the corresponding structure of FIG. 1, and the operation of the valve is also substantially the same. However, the installation of the housing 138 and associated holding structures have ignition wires 144 encased in the container to prevent environmental contamination and / or degradation, adding a safety measure to the operation of the valve. It has been.
[0034]
  FIG. 8 shows the valve of FIG. 7 except that a set of parallel actuators 130 act instead of the single actuator of FIG.Assembly 124Same valve asassembly146 is shown. Again, each from actuator 130A pair ofA boss 134, adapter 132 and extension 136 are used to hold a suitably sized housing 148 that receives the ignition wire 144. As shown in the figure, the housing 148 has an ignition wire as described above.144Cylindrical connected toFixture150, 152. In all other respects, the valveAssembly 146Is a valveAssembly 124Matches.
[0035]
  Shown in FIGS.ValveA preferred form of assembly is represented by numeral 210. The valve assembly 210 has many elements that are the same or similar to the valve assembly 10 shown in FIGS. In particular,Valve body212 is the same as FIG.Figure4 described above in connection with the valve assembly 10Valve body12 elements that are identical, have the same function and operate in the same way.
[0036]
  Actuator 220 is a gate valvememberAct asGate valveIt includes a cylindrical housing that forms a cylinder 256 that houses a reciprocable piston 272 coupled with a piston rod 271 directly connected to a plate 224.Gate valve member224 isValve bodyEach of 212 has a circular opening 214 having the same diameter as that of passages 228 and 229 arranged on a straight line of flanges 242 and 244.
[0037]
  As best shown in FIG. 10, the actuator 216 isDa 2It has an upper fitting 260 that connects directly to the 56 annular upper ends.TopThe fixture 260 has an irregularly shaped passage 262 that communicates with the interior of the cylinder 256, and the cartridge described above.The 2Same configuration as 2Mosquito-TriThe 222 is attached. CartThe 2The composition of the propellant 22 is a combination of potassium chlorate, nitroglycerin, nitrocellulose and lead thiocyanate as described above.The 22 has the same properties and specifications as described above for 2.
[0038]
  During propellant combustion, the proportions of propellant components, their amounts, and the burning rate are correlated, and the pressure measured when high temperature combustion products from propellant combustion are introduced into a 32 cc test vessel. Is31.0-37.2 MPa (4,500-5,400 psig)It is. In addition, the cartridgeDiThe composition of the propellant and its combustion rate were adjusted so that the flow rate of the gas product from the combustion led to the housing 256 was maintained at a subsonic speed, that is, not exceeding Mach 1. A suitable gas cartridge starter is Blue Spring, Missouri.Fake CorporationNo. 02-4134.
[0039]
  From FIG.TopThe piston 272 in the initial position closest to the fixture 260 is inserted into the cartridge.The 2It can be observed that the 22 discharge ends 263 are directly facing. further,TopA surface 272a of the piston 272 facing the fixture 260, andTopSurface 260a of fixture 260 defines an extensible chamber 280 that cooperates to receive pressurized gas.
[0040]
  The housing 282 for the electrical control element is preferablycartridgeA cartridge including an electrical discharge module electrically connected to an ignition device forming part of 222.TheAttached to the outer end. Gate valveBoardWhen receiving an electrical signal that activates either the opening or closing of the passageway, a current is directed to the starter's wire due to electrical resistance, thus generating enough heat to ignite the fuel loaded in the starter And then the cartridgeTheIgnite the propellant mixture.
[0041]
  Isolation of the present inventionGatevalveassemblyIn a preferred embodiment of the invention, the piston and cylinder assembly comprises a cylindrical housing 256 and a piston 272, the piston having a diameter of0.0508, 0.0762, 0.102, 0.152, 0.203 and 0.254m (2, 3, 4, 6, 8 and 10 inches)Diameter when used with other pipes0.0762m (3 inches)It is preferable to use a piston with0.305, 0.356, 0.406, 0.457 and 0.610m (12, 14, 16, 18 and 24 inches)The isolation valve used in a piping system with0.102m (4 inches)It is desirable to use a piston and confinement housing. Use in pipes with equivalent diameters in metric unitsValve assemblySubstantially the same relationship is maintained. In this regard,Valve assemblyThe gate valveMember 18Appropriately, 224 is manufactured and arranged to move to an appropriate arrangement to act to open or close the piping orifice when needed. so,0.0508m (2 inches)In the exampleGatevalvememberIs the lowest0.0508m (2 inches)While it is necessary to move0.610m (24 inches)At least for plumbing0.610m (24 inches)It is necessary to move. Regarding the size of other pipes,GatevalvememberCorresponding movements are required.
[0042]
  For example, referring to FIGS. 1 and 10, each of the present inventionValve assemblyIsValve assemblyRegardless of the diameter of the piping used, the face of the piston and the adjacent gas discharge end of the cartridge 22 or 222 are manufactured to be spaced apart. In the embodiment of the invention shown in FIG.0.00635m (1/4 inch)This spacing ensures that the gas released from the exit orifice of the gas generating cartridge 22 or 222 diffuses evenly over the adjacent face of the piston, thereby starting the movement of the piston, resulting in a gate The valve member or gate valve plate 18 or 224 moves. For example, if the initial position of the piston 272 is directly meshed with the outlet orifice of the cartridge 222, the combustion gas product released from the cartridge will not diffuse evenly over the surface of the piston 272 and the gatevalveMember or gatevalveThere is no forward controlled acceleration where the movement of the plate 224 is required. Therefore, in all aspects of the present invention, it can be confirmed that a gap is provided between the cartridge 22 or 222 and the piston 72 or 272.
[0043]
  The spacing provided between the face of the piston 72 or 272 and the cartridge 22 or 222 associated with the surface of the gas generating cartridgeUnit (cartridge)The pressure gas released to the adjacent surface is adjusted, thereby preventing an undesirable initial force from being applied to the piston immediately after starting the cartridge. Gate valve deviceIs a valve assemblyBy changing the distance between the cartridge and the piston according to the size of the piston, the piston and the gate connected to itvalveTo ensure that the member operating speed is maintained within the required parameters described above, the piston and gatevalveWith regard to member acceleration, it has become clear that the required control can be performed closely and conveniently. As such, in certain applications where a larger initial spacing between the cartridge and the adjacent piston face is required, providing a longer overall length cylinder can be easily achieved.AndTo increase the spacing between the cartridges, the pistons can be placed in a more spaced relationship from the cartridge at the non-operating piston position.
[0044]
  For example,0.0508m (2 inches)In the case of a gate valve device for piping, the piston is0.0508m (2 inches)As described above, the diameter of the movable cylinder0.0762m (3 inches)And the initial spacing between the piston and the cartridge housing is approximately0.102m (4 inches)And thus has been shown to provide a pressurized gas regulation zone on the piston.0.0762, 0.102, 0.152 and 0.203m (3, 4, 6 and 8 inches)Gas cartridge driven isolation for piping sizeGatevalveassemblyThen, pistonAndThe distance between the cartridges is minimal0.00635m (1/4 inch)In addition0.0508m (2 inches)It has become clear that there is an initial interval of0.254, 0.305, 0.356 and 0.406 m (10, 12, 14 and 16 inches)Gas cartridge driven isolation for piping sizeGatevalveassemblySo the initial spacing between the piston and gas cartridge is minimal0.00635m (1/4 inchButProven to be sufficient.0.508m (20 inches)Valve for pipingassemblyThen about0.0508m (2 inches)It was determined that an initial interval of
[0045]
  diameter0.305m (12 inches)The size of the present invention for the above pipesValve assemblyFor example, two gas generating cartridges shown in FIG. 6 or FIG.unitThe best results were obtained using 22 and 222.
[0046]
  0.152m (6 inches)Exemplary isolation for piping systemsGatevalveassemblyIn theFillingThe amount is about the pressure4.14 MPa (600 psig)From0 Pa (0 psig)In order to move the gate valve plate 224 to the fully activated position in about 18 msec, with a relatively uniform decrease to0.0762m (3 inches)The composition is preferably such that the combustion gas product is guided to the actuator 220.
[Brief description of the drawings]
FIG. 1 of the present inventionisolationIt is a fragmentary vertical sectional view which shows one form of a gate valve assembly, and the gate valve of a valve open positionmemberIs indicated by a solid line, and the gate valve in the valve closing positionmemberIs represented by a broken line.
FIG. 2 is an enlarged cross-sectional view detailing a preferred gas generating cartridge unit forming part of the valve assembly of FIG.
FIG. 3 is a vertical cross-sectional view taken along line 3-3 of FIG.Gate valveIndicates a member.
4 is a vertical sectional view similar to FIG. 3, but in the valve closed position.Gate valveIndicates a member.
FIG. 5 shows a gas generation cartridge unit that has a valve assembly.ofGatevalveFIG. 6 is a partial cross-sectional cutaway view of another embodiment of the present invention arranged on a straight axis of a member with the part removed.
FIG. 6 is a partial cross-sectional cut-away view of another embodiment of the present invention in which a set of gas generating cartridge units is used, with parts removed.
[Figure 7] Gas generation cartridgeJiyuFIG. 6 is a partial cross-sectional cut-away view showing another embodiment of the present invention using a housing-type container disposed near a knit ignition wire.
FIG. 8 is a set of gas generating cartridges having a housing-type container around an ignition wire.unitIt is a cutaway view of a partial cross section showing another embodiment of the present invention using.
FIG. 9 is a front view of a preferred embodiment of the isolation gate valve assembly of the present invention.
10 is a vertical cross-sectional view of a cross section taken along line 10-10 in FIG. 9 as seen from the direction of the arrow.
Fig. 11 LargerisolationGate valveassemblyFIG. 2 is a side cutaway view of one type of shock absorber unit that includes a retractable cellular shock absorber element that can be utilized in
12 is a horizontal cutaway view of the buffer unit shown in FIG.

Claims (11)

A valve body that provides a passage through its interior;
A gate unit including a gate valve member that is movable between a valve open position that is proximate to the passage and allows flow through the passage and a valve closing position that is a position that blocks flow with respect to the passage;
An isolation gate valve assembly including an actuator for moving the gate valve member between the valve open position and the valve closed position;
The actuator is
An elongated cylindrical housing;
A piston movable in the longitudinal direction of the cylindrical housing;
A piston rod that connects the piston and the gate valve member, and moves the gate valve member between the valve open position and the valve closed position in accordance with movement of the piston;
A gas generating cartridge unit having a gas discharge end,
The gas generating cartridge unit is connected to the cylindrical housing at a position defining a pressurized gas receiving chamber that is extendable between the piston and the gas discharge end of the gas generating cartridge unit;
The gas generating cartridge unit ignites with a controlled rate to create a flow of pressurized combustion gas product at a rate not exceeding about Mach 1 flowing into the pressurized gas receiving chamber. Gas explosives are given,
The piston is close to the gas discharge end of the gas generating cartridge unit by being pressurized with the gas introduced from the gas generating cartridge unit into the pressurized gas receiving chamber, but there is a gap. It is arranged to move from the initial position to the position after the operation, and to move the gate valve member from one position to another position,
The pressurized gas that first entered the pressurized gas receiving chamber by ignition of the explosive is transmitted to the piston, the piston rod connected thereto, or the gate valve member. A position at a sufficient distance from the gas discharge end of the gas generating cartridge unit to prevent them from being damaged;
The gas produces a propulsive force capable of moving the piston, so that the gate valve member is between 5.08 and 8.38 m / sec (0.28) from the initial position of the piston to the position after the operation. Isolation gate valve assembly moving at a speed of ~ 0.33 inch / msec).   A buffer unit is provided that performs a predetermined deceleration action controlled by the gate valve member by engaging with the gate valve member when the piston approaches the position after the operation. The isolation gate valve assembly according to claim 1.   The isolation gate valve assembly according to claim 2, wherein the buffer unit is an elastic element having a Shore A hardness of 60-70.   The buffer unit is a honeycomb cell-like member whose cell axis is arranged in parallel with the movement path of the gate valve member, and the honeycomb cell is moved when the gate valve member moves to the position after the operation. The isolation gate valve assembly of claim 2, wherein the shaped member contracts to decelerate the gate valve member.   The isolation gate valve assembly according to any one of claims 1 to 4, wherein the gas generating cartridge unit includes an elongated cylindrical cartridge body, and the cartridge body is disposed in a transverse relationship with the cylindrical housing. Said gas generating cartridge unit is an elongated cartridge comprises a body, said cartridge body isolation gate valve assembly according to claim 1 is arranged in a straight line of the cylindrical housing.   The isolation gate valve assembly according to any of claims 1 to 6, comprising a plurality of said gas generating cartridge units, all of said gas generating cartridge units being in direct communication with said pressurized gas receiving chamber.   8. A control device for the gas generating cartridge unit is provided, the control device being attached to the tubular housing in direct association with the gas generating cartridge unit. Isolation gate valve assembly.   The gate valve member is a plate-like member having an opening communicating with the passage of the valve main body, and the opening and the passage coincide with each other at the valve opening position, and the opening at the valve closing position. The isolation gate valve assembly according to any one of claims 1 to 8, wherein the portion and the passage do not coincide with each other. Wherein the opening of the gate valve member, the isolation gate valve assembly of claim 9 before Symbol is a sectional same size and of the passage.   The isolation gate valve assembly according to claim 9 or 10, wherein a cross section of the opening of the gate valve member and the passage of the valve body is circular.

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