• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    An improved electro-pneumatic monitor for double safety valves controlled by solenoid-operated pilot valves. The monitor comprises a relatively short spool centrally held by oppositely disposed captive springs. The sensing passages are provided with relatively small orifices which help to de-sensitize the monitor. The resulting construction is resistant to shifting in response to minor double valve irregularities which otherwise could create undesired lockout conditions.
    公开号:SU976860A3
    申请号:SU792788849
    申请日:1979-07-10
    公开日:1982-11-23
    发明作者:Бенсон Портер Эдвард
    申请人:Росс Оперейтинг Вэлв Компани (Фирма)；
    IPC主号:
    专利说明:

    An electric switch connected to it, the normally closed contact of which is included in the supply circuit of the parallel-connected windings of electropneumatic command valves, the pneumatic inputs of which are connected to the inlet channel, the outlets to the control chambers of the double safety valve, and the reset cavities of the electropneumatic control valves are connected with a discharge channel, in the housing there is a shaft and end seals provided with seals, in which the shaft ends are fixed, on which the The double piston is still, between the end caps and the double piston there are indicator chambers connected to the indicator salts through the channels in the housing and the end caps, and the springs are placed on the shaft between the end caps and the double piston. The middle part of the shaft is made with the shoulders on which the springs rest. In the middle part of the double piston, a groove is made in which the electric switch is placed. In the channels of the housing and end caps between the indicator nozzles and chambers are installed, the damping force chokes with different hydraulic resistance are installed. Fig. 1 shows a double-right safety valve with a pneumatic control device; Fig, 2 - knot end plug, section; Fig. 1 shows a double. Piston in its extreme position with a shaft and an electric switch. The double safety valve contains main valves, the spools 1 of which are connected to the springs 2. The inlet channel 3 is connected to the inlet chamber k, in which the springs 2 are located. The output cavity 5 of the safety valve, located between its spools 1, is connected to the output channel 6, and dump camera 7 - with channel 8 reset. Control chambers 9 spools 1 are connected to pneumatic outlets of electropneumatic control valves 10, whose inlets are connected to the inlet channel 3 and the relief cavities to the channel 8. The parallel-connected windings of the valves 10 are connected to the power source 11 via
    normally closed contact of the electric switch 12, the pusher 13 of the switch 12 is located in the groove I of the middle part of the double piston 15 mounted on the shaft 16, the ends of the wa 16 are fixed in end plugs 17 and 18, equipped with seals 19.
    Shaft 1b has mechanical seals 20, a piston 15 and a central seal 21. The shaft is mounted in cavity 22 of housing 23. The middle part of shaft 16 is made with flanges 2 and 25, on which clutches 26 are supported. Between couplings 26 and end caps 17 and iSpachenoi spring of 27 The sleeves 28 are mounted on the shaft 16, which serve to limit the stroke of the double piston 15. Indicator nozzles 29 30 are located opposite the main valve spools 1 and connected through the first throttles 31, the chambers 32 and the second throttles 33 to the indicator chambers Z and 35, respectively. uyuschim way. In normal operation, the double fuse: The pressure valve in the indicator chambers 3 and 35 is the same. Due to the action of the springs 27, the double piston 15 is in the middle position, in which the pusher 13 is not pressed (Fig. 1). In this case, the windings of the electropneumatic command valves 10 are supplied with electric power from the source 11, and through the pressure valves 10 the power from the channel 3 enters the control chambers 9 of the spools 1, which move to the lower position. Channel 3 is connected to the output channel 6. In the event of a double check valve malfunction, for example when one of the spools 1 fails, the degree of closure of the indicator nozzles 29 and 30 changes, and the pressure in the indicator chambers 3 and 35 becomes unequal. This causes the double valve 15 to move, the pusher 13 is depressed, and the switch 12 is disconnected. The electrical supply from the windings of the valves 10 is removed, the spools of these valves move upwards, which leads to the release of pressure from the chambers 9 and the movement of the spools 1 upwards. In this position, the output channel 3 is connected to the reset channel 8. 5 Short-term pressure changes in the indicator nozzles 29 and 30 are damped, throttles 31 and 33. The device is turned on after the fault has been eliminated manually by pressing the push rod 13. The proposed device allows increasing the reliability of the double safety valve and the corresponding process equipment. Claim 1, A pneumatic-electric control device for a double safety valve controlled by electropneumatic command valves, comprising a housing in which indicator nozzles are installed opposite the spools of the safety valve on the side of its outlet cavity located between the spools and connected to the output channel an inlet channel connected to the inlet chamber, in which two springs are located, connected to the safety valve stalls and a discharge channel, connected to the waste chamber of the safety valve, double piston with seals and associated with a non-electric switch, the normally closed contact of which is included in the supply circuit of parallel-connected windings of electropneumatic command valves, the pneumatic inputs of which are connected to the input channel, the outputs are controlled chambers of the gold double-relief valve, and the discharge cavities of the electropneumatic command valves are connected to the discharge channel, characterized in that To increase the reliability of the device, a shaft and seals with end seals are installed in the housing. the springs are placed on the shaft between the end caps and the double piston. 2. The DEVICE according to claim 1, characterized in that the middle part of the shaft is made with shoulders on which the springs rest. 3. The device according to paragraphs. 1 and 2, differing in that in the middle part of the double piston there is a groove in which the push rod of the electric switch is placed. 4. Device on PP. 1-3, characterized in that damping throttles with different hydraulic bonpofHBflefiHeM are installed between the indicator nozzles and chambers in the channels of the gorpus and end caps. Sources of information taken into account in the examination 1.US Patent If 2.09b., Cl. 121-38, 1959. 2. Kas. Nbnitor lockout assy, with manuar reset. Rose operating Velve Co, 1979, part number 968C93 (prototype). ..
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    权利要求:
    Claims (4)
    [1]
    Claim
    1. A pneumatic-electric control device for a double safety valve controlled by electro-pneumatic command valves, comprising a housing in which indicator nozzles are located J0 located opposite the safety valve spools from the side of its outlet cavity located between the spools and connected to the output 25th channel , the input channel connected to the input chamber, in which there are two springs associated with the spools of the safety valve, and a discharge channel connected to the reset - 30 chamber of the safety valve, a double piston with seals and an associated electrical switch, the normally closed contact of which is included in the power supply circuit of the 35 parallel-connected windings of the electro-pneumatic control valves, the pneumatic inputs of which are connected to the input channel, the outputs - with control cameras gold - 40 nicknames of the double safety valve, and the discharge cavities of the electro-pneumatic command valves are connected to the discharge channel, characterized in that / in order to increase the reliability and devices, a shaft and end caps equipped with seals are installed in the housing, in which the ends of the shaft on which the double piston is mounted are fixed, between the end caps and the double piston there are indicator chambers connected to the indicator nozzles through channels in the body and end caps, and the springs are placed on the shaft between the end caps and the double piston.
    [2]
    2. The device pop. ^ characterized in that the middle part of the shaft is made with beads on which the springs are supported.
    [3]
    3. The device according to paragraphs. 1 and 2, characterized in that in the middle part of the double piston a groove is made in which the pusher of the electric switch is placed.
    [4]
    4. The device according to paragraphs. 1-3, which results in the fact that in the channels of the housing and end caps between the indicator nozzles and chambers damping chokes are installed with different hydraulic resistance Sources of information ^ and taken into account during the examination
    1. US Patent Ν ’2.096.246, cl. 121-38, 1959.
    2. Kam. Monitor lockout assy, with manuar reset. Rose operating velve Co, 1979, part number 968C93 (prototype). .
    . 976860
    Figure 1
    Fig. G
    类似技术:
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    US3106623A|1963-10-08|Snap action differential actuator
    US4356842A|1982-11-02|Control valve set for a completely pneumatical low- and operation pressure control
    同族专利:
    公开号 | 公开日
    GB2043302B|1983-01-26|
    FR2449815B1|1984-04-27|
    JPS55112407A|1980-08-30|
    IT1121937B|1986-04-23|
    IT7923869D0|1979-06-26|
    DE2923467A1|1980-09-04|
    GB2043302A|1980-10-01|
    US4291613A|1981-09-29|
    FR2449815A1|1980-09-19|
    DE2923467C2|1985-09-26|
    JPS6014923B2|1985-04-16|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US2324750A|1938-09-14|1943-07-20|Oilgear Co|Control for hydrodynamic machines|
    US2527727A|1946-07-03|1950-10-31|Hobbs Transmission Ltd|Power transmission apparatus|
    US2529393A|1946-09-28|1950-11-07|Clark Equipment Co|Fluid control means for auxiliary transmissions|
    US2491087A|1947-07-30|1949-12-13|Harland W Cardwell|Air controlled shifting mechanism|
    FR1241522A|1958-11-26|1960-09-16|Safety control device for a servo-control circuit serving one or more devices actuated by a pressurized fluid applicable in particular to presses|
    DE1426503B2|1960-04-08|1971-02-04|Herion-Werke Kg, 7012 Fellbach|Safety control for a pressure medium circuit by means of a measuring element|
    FR1276374A|1960-12-19|1961-11-17|Servo-control system combined with at least two devices operating under pressure, usable in particular for controlling presses|
    DE1426512B2|1964-02-13|1971-10-07|Henon Werke KG, 7012 Fellbach|SERVO CONTROL FOR A PRESSURE CONSUMER IN PARTICULAR FOR THE CLUTCH OR BRAKE OF A PRESS DRIVE|
    US3708211A|1967-03-28|1973-01-02|Wagner Electric Corp|Control valve system|
    FR1555573A|1967-07-21|1969-01-31|
    US3606486A|1969-10-28|1971-09-20|Hydrasearch Co Inc|Brake indicating safety valve|
    US3606487A|1969-11-04|1971-09-20|Wagner Electric Corp|Control valve|
    JPS5147555B2|1972-07-29|1976-12-15|
    US3799202A|1972-11-29|1974-03-26|Sperry Rand Corp|Power transmission|
    FR2221723B2|1972-12-27|1975-10-31|Dba|
    JPS588161B2|1974-07-30|1983-02-15|Furukawa Electric Co Ltd|DE2930571A1|1979-07-27|1981-02-12|Technomatic Ag Aesch|SAFETY VALVE|
    JP2529620Y2|1991-02-27|1997-03-19|甲南電機株式会社|Monitor of solenoid valve|
    SE505573C2|1995-12-19|1997-09-15|Ross Operating Valve Co|Control device with self-control of the control device components during each control operation|
    US5799561A|1996-07-15|1998-09-01|Ross Operating Valve Company|Control device|
    SE9600697L|1996-02-23|1997-03-24|Ross Operating Valve Co|Feedback lock for one self-controlling controller in each work cycle|
    US7114521B2|2003-09-03|2006-10-03|Ross Operating Valve Company|Double valve constructed from unitary single valves|
    JP4284687B2|2005-04-26|2009-06-24|Ｓｍｃ株式会社|Compound valve for vacuum and vacuum break|
    EP3087279B1|2014-03-06|2021-12-01|Festo SE & Co. KG|Valve assembly|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    US06/014,642|US4291613A|1979-02-23|1979-02-23|Monitor for double safety valves|
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