US3239762A - Means for indicating load unbalance in multiple anode current ionic valves - Google Patents

Means for indicating load unbalance in multiple anode current ionic valves Download PDF

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Publication number
US3239762A
US3239762A US321630A US32163063A US3239762A US 3239762 A US3239762 A US 3239762A US 321630 A US321630 A US 321630A US 32163063 A US32163063 A US 32163063A US 3239762 A US3239762 A US 3239762A
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US
United States
Prior art keywords
valve
gas
anode
releasing device
tube
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US321630A
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English (en)
Inventor
Engstrom Carl-Erik
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ABB Norden Holding AB
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ASEA AB
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Filing date
Publication date
Application filed by ASEA AB filed Critical ASEA AB
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Publication of US3239762A publication Critical patent/US3239762A/en
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J13/00—Discharge tubes with liquid-pool cathodes, e.g. metal-vapour rectifying tubes
    • H01J13/02—Details
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
    • H02H7/12—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers
    • H02H7/1209—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for converters using only discharge tubes
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of AC power input into DC power output; Conversion of DC power input into AC power output
    • H02M7/02—Conversion of AC power input into DC power output without possibility of reversal
    • H02M7/04—Conversion of AC power input into DC power output without possibility of reversal by static converters
    • H02M7/06—Conversion of AC power input into DC power output without possibility of reversal by static converters using discharge tubes without control electrode or semiconductor devices without control electrode
    • H02M7/08—Conversion of AC power input into DC power output without possibility of reversal by static converters using discharge tubes without control electrode or semiconductor devices without control electrode arranged for operation in parallel
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2893/00—Discharge tubes and lamps
    • H01J2893/0072—Disassembly or repair of discharge tubes
    • H01J2893/0073—Discharge tubes with liquid poolcathodes; constructional details

Definitions

  • Converter ionic valves for high voltage direct current are extremely safe in operation and the ionic valve rooms therefore seldom need inspecting by the station personnel. It is thus desirable for a fault of the nature mentioned in the introduction to be remotely indicated where the personnel are.
  • the anodes are situated at a potential of the order of magnitude 100 kv. and it is therefore inconceivable to use normal transmission of the measured value or signals by wires.
  • each anode is provided with a thermal releasing device influenced by the anode current and with a gas valve controlled by the thermal releasing device, the valve being connected in a tube system of insulating material so that it can influence the gas pressure in a gas container situated at the earth potential and provided with a pressure-sensitive measuring means.
  • FIGURE 1 shows schematically one embodiment of the invention
  • FIGURE 2 shows the gas valve used.
  • FIGURE 1 shows the invention for use with an ionic valve having four anodes.
  • the valve housing which contains a cathode or cathodes, is designated 1.
  • Each anode is enclosed in an insulator tube positioned on the valve housing and said anode insulator is surrounded by an outer tube 2 of insulating material.
  • the anode insulators support an air drum 3 which, together with the tubes 2, forms an air cooling system for the anode insulators.
  • a thermal releasing device is connected in parallel.
  • the releasing device consists of a heating body which is heated by a current proportional to the anode current.
  • the alternation in length of the heating body controls the releasing arm 6 shown in FIGURE 2 at one end 7 of the heating body.
  • the releasing arm 6 is pivoted at 8 and its other end 9 is arranged to engage a knob 10 acting as a block on a valve rod 12 connected to the gas valve 11.
  • a knob 10 acting as a block on a valve rod 12 connected to the gas valve 11.
  • FIGURE 1 the arrangement for the action of the releasing device on the gas valve 11 is schematically indicated by the connection 13.
  • a tube 14 opens, made of an electrically insulating material, preferably plastic. At the other end the tube is connected to a gas container 15 in which gas, suitably air, is by means of a pumping means, not shown, maintained at a certain pressure.
  • gas suitably air
  • the tube 14 acts as an inlet for the gas from the container 15 to the lefthand valve.
  • the tube 14 ends 3,239,762 Patented Mar. 8, 1966 in a valve seat 16. From the valve housing an outlet tube 17 leads to the next valve 11b so that the tube 17 acts as an inlet to the last mentioned gas valve from the container 15.
  • valve 11b is connected to the valve 110 by means of a tube 18 and the valve 11c is connected with the valve 11d by means of a tube 19.
  • the outlet tube 20 from the valve lid is led to a cylinder 21 at the earth potential, said cylinder containing a spring-influenced piston 22 which is arranged to operate a contact 23.
  • valve plate 24 On the valve rod 12 in the valve housing to the gas valve 11 is attached a valve plate 24 provided on both sides with seals.
  • the valve plate In its upper position the valve plate abuts an upper valve seat 27 which is arranged on an intermediate wall 28 in the valve housing. Between the valve rod 12 and the upper valve seat there is a cylindrical channel 29. The valve rod is kept in its upper position by the lever 6 which abuts the under side of the knob 10.
  • valve rod and valve plate have taken up their lower positions because the releasing device 5 has swung the releasing arm 6 away from the knob 10, the valve rod can be returned to its upper position by a lever 30 and a pullthread 31.
  • a lever 30 and a pullthread 31 In the part of the valve housing situated above the dividing wall 28 are one or several holes 32 which join the upper part of the valve housing with the outer air.
  • the releasing device 5 is provided with a flag to indicate that release has taken place.
  • the arrangement operates in the following way. If the current in any of the anode conduits 4, due to unequal loading, exceeds the value set on the corresponding thermal releasing device 5, the releasing device influences the lever 6 so that the valve rod 12 is released and the valve plate 24 is pressed against the valve seat 16 so that the tube 14 is shut off from the inside of the valve housing. At the same time as the valve plate 24 leaves its upper valve seat the tube 17 will be placed in communication with the open air via the lower part of the valve housing, the cylindrical channel 29, the upper part of the valve housing and the holes 32. The pressure in the entire succeeding part of the tube system and also in the following gas valves will then drop to atmospheric pressure. The spring in the cylinder 21 presses the piston 22 to the left so that the contact 23 closes and a signal is given.
  • Means for indicating overload current in multiple anode ionic valves comprising, for each anode, a thermal releasing device responsive to variations in the anode current and a gas valve controlled by said thermal releasing device, each said gas valve comprising a valve housing with inlet and outlet tubes and spring actuated valve means in said valve housing operatively connected to said thermal releasing device for normally connecting the inlet and outlet tubes to each other, said valve means including means responsive to a release impulse from said thermal releasing device for cutting off such connection and establishing a connection between the outlet tube of such gas valve and the atmosphere, a gas container, means connecting said gas container to the inlet tube of the valve housing of a first of said gas valves, means connecting the outlet tube of each gas valve other than the last gas valve to the inlet tube of the next gas valve, 21 of said means for establishing the connection between the pressure sensitive measuring device, and means connectoutlet tube and the atmosphere.
  • each gas valve being provided with at least one gas dis- 2 593 2 0 4 1952 Brown 3 5 charge hole which connects said outlet tube to the at- 3,140,852 7/1964 Herzog 251-41 mosphere when said valve means cuts 0E the connec- 3,151,834 10/1964 Ray 251-11 tion between said outlet and inlet tubes, thereby connecting said pressure sensitive measuring device to the 10 JOHN W'HUCKERTPnmary Examiner atmosphere, said gas discharge hole constituting a part KRAFT,ASSi-Ytant Examiner-

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Control Of Fluid Pressure (AREA)
  • Safety Valves (AREA)
US321630A 1962-11-29 1963-11-05 Means for indicating load unbalance in multiple anode current ionic valves Expired - Lifetime US3239762A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE1282262 1962-11-29

Publications (1)

Publication Number Publication Date
US3239762A true US3239762A (en) 1966-03-08

Family

ID=20296365

Family Applications (1)

Application Number Title Priority Date Filing Date
US321630A Expired - Lifetime US3239762A (en) 1962-11-29 1963-11-05 Means for indicating load unbalance in multiple anode current ionic valves

Country Status (3)

Country Link
US (1) US3239762A (de)
CH (1) CH413078A (de)
GB (1) GB1056458A (de)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2593260A (en) * 1946-10-12 1952-04-15 Cutler Hammer Inc Cooling system for electron tubes and other devices
US3140852A (en) * 1959-01-19 1964-07-14 Lins Albert Electrically actuated valve
US3151834A (en) * 1961-10-19 1964-10-06 Itt Heat motor operated valves

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2593260A (en) * 1946-10-12 1952-04-15 Cutler Hammer Inc Cooling system for electron tubes and other devices
US3140852A (en) * 1959-01-19 1964-07-14 Lins Albert Electrically actuated valve
US3151834A (en) * 1961-10-19 1964-10-06 Itt Heat motor operated valves

Also Published As

Publication number Publication date
CH413078A (de) 1966-05-15
GB1056458A (en) 1967-01-25

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