Classifications

• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
  • H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
  • H01J9/38—Exhausting, degassing, filling, or cleaning vessels
  • H01J9/395—Filling vessels

Definitions

• the present invention relates to an apparatus for stabilizing the pressure of a gas to be sealed in a tube such as a fluorescent lamp so as to be always constant.
• a sealed gas such as an argon is sealed in a tube at a predetermined pressure.
• a gas of the same type as the filling gas is sent as a cleaning gas from one end of the valve, so that impurities such as air and nitrogen in the valve are removed.
• There is a so-called flow exhaust method that exhausts the gas and replaces it with a sealed gas to seal the exhaust pipe.
• the internal pressure of the bulb due to the cleaning gas in the flow exhaust causes a variation of, for example, 5 to 2 torr due to the variation of the exhaust pipe diameter.
• the gas is filled as a filling gas, the pressure of the gas varies too much.
• the inside of the bulb is depressurized to, for example, about 0.5 torr, and then the sealed gas is filled to a pressure of, for example, about 2.5 torr, and then the exhaust pipe is sealed.
• the gas pressure in the tube For example, it takes about 30 seconds to reduce the internal pressure of a 5 torr tube to 0.5 torr.
• the work efficiency was poor in mass production.
• this method has a drawback that the process is complicated because the gas is refilled after the pressure in the tube is reduced.
• an object of the present invention is to provide a sealed gas pressure stabilizing apparatus capable of constantly and stably adjusting a gas pressure in a tube to a desired pressure in a simple and short time. Disclosure of the invention
• the sealed gas pressure stabilizing device comprises a first type of a conductance C.i, a second type of a conductance C2 and a ing encompasses a hollow body having a third i-flop duct motor down scan C s also Ru Nodea.
• the co-down duct data down vinegar C i said co-down da-click data down the scan C 2 and C have small also Ri either by the a.
• the first type is connected to a gas source of the same kind as the desired gas to be sealed in the bulb, the second type is connected to a vacuum system, and the third type is connected to the type. ing.
• the gas pressure in the third pipes in a state in which the gas' source or these gases are flow constantly into the first i-flop or we second Lee-flop Is set to be equal to or less than the desired gas pressure in the tube '.
• FIG. 1 is a schematic view of the entire gas filling system incorporating the gas pressure stabilizing device according to the present invention
• FIG. 2 is a cross-sectional view of the gas pressure stabilizing device according to the present invention.
• FIG. 1 schematically shows a gas filling system incorporating the filled gas pressure stabilizer 3 of the present invention.
• FIG. 1 schematically shows a gas filling system incorporating the filled gas pressure stabilizer 3 of the present invention.
• J ⁇ is a fluorescent lamp sphere, and at one end of the tube 2, an exhaust pipe 2 communicating with it is provided.
• the exhaust pipe 2 is airtightly held by a head 4 fixed to a slider 3 of an exhaust machine (not shown).
• a connection pipe 5 communicating with the exhaust pipe 2 is installed at the head 4 and the other end of the connection pipe 5 is a disc-shaped rubbed 11 "roll called a center-pulp. It is connected to one valve element a of the valve 6.
• the other pipe element ff b of the rotary valve S is connected to the disconnect pipe 7.
• the communication pipe 7 and the connection pipe 5 are connected to the valve element 6a. , 6b communicate with each other via a communication passage in the valve body at a predetermined position during the rotation when they slide relative to each other.
• an enclosed gas pressure stabilizing device S At the other end of the communication pipe 7, an enclosed gas pressure stabilizing device S according to the invention ′ is installed.
• the sealed gas pressure stabilizing device 9 includes a hollow body J 0, for example, a cylindrical hollow body. One end of this hollow body;
• the conductances C i, C 2 and c 3 satisfy the relationship of c t, c 2 and c 3 , and the conductances 0 and C 2 are In the state where if is constantly flowing from the gas source J? 5 to the second input J2 from the first input 2J, the third input
• the gas pressure is equal to or lower than the desired gas pressure to be achieved in the bulb J (preferably equal to or near)
• the diameter of the pipe 1 J (K3 BS, the diameter of the pipe J 2 is made larger than this, and the lengths ⁇ i and 2 of these pipes i J, Jf 2 are O gd s of pie J 3 is set to be sufficiently larger than d 2 , so that the condtags of ip 11, 12, 13
• the lens satisfies the relationship between C i and C 2 and C S.
• the pressure from the gas source 5 is P 0
• the pressure in the hollow body J 0 is P
• the pulsation pressure in the hollow body J0 is obtained from the fluid resistance at both ends of the hollow body 20.
• the inner diameter and d 2 are set to be equal to or lower than the desired gas pressure to be achieved within 1 (that is, the conductances C i and C 2 To set). You may have more than one pipe each.
• hollow body desired gas pressure substantially matches the gas pressure which intends Yo achieved in the bulb occurs If the inside of Jf ⁇ > is communicated with the inside of the tube ⁇ ⁇ , the pressure in tube 2 also matches the pressure in the hollow body J ⁇ . Thus, the desired gas pressure is achieved in the tube 2.
• the same type of gas as the sealed gas for example, an inert gas such as argon, is sent into the tube J by the above-described flow exhaust method to discharge air from the tube ⁇ .
• ⁇ is replaced with a Le Gore emission gas
• the connecting pipe 5 and the communication pipe 7 are made different from each other in the rotary valve 6, so that the inside of the bulb J and the inside of the hollow body J 0 of the sealed gas pressure stabilizing device S are formed. And are communicated.
• the inside of the hollow body J is momentarily kept at a pressure of 2.5 torr, for example, because the atmosphere of the argon gas flow is maintained.
• the discharge of argon gas in the tube is started via type J3 of the
• the gas pressure in the tube J decreases to the gas pressure in the hollow body 0, for example, 2.5 torr, and becomes stable at this pressure value.
• the time required for the gas pressure to stabilize was about 8 seconds.
• the exhaust pipe is air-tightly burned and sealed by an exhaust pipe burning device, and the gas filling process is completed.
• the gas pressure in the hollow body J is a desired value (for example,
• the gas pressure in the tube J is not affected.
• the pressure can be maintained at a precise predetermined pressure.
• the configuration of the gas pressure stabilizer 9 is extremely simple, it is easy to manufacture and inexpensive. It is possible to maintain stable performance without any risk of failure.
• the present invention is not limited to the flow exhaust method, and can be applied, for example, to the case where gas is sealed after evacuation in a tube as in the past, and in general, low-pressure gas is generally used. It can also be used as a gas-filled shell for sealed tubes.

Landscapes

• Engineering & Computer Science (AREA)
• Manufacturing & Machinery (AREA)
• Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)
• Control Of Fluid Pressure (AREA)
• Discharge Lamp (AREA)

Priority Applications (2)

Applications Claiming Priority (2)

Publications (1)

Family

ID=14920867

Family Applications (1)

Country Status (6)

Families Citing this family (5)

Family Cites Families (7)

• 1978
  • 1978-10-13 JP JP12586678A patent/JPS5553043A/ja active Granted
• 1979
  • 1979-10-11 NL NLAANVRAGE7920081,A patent/NL182437C/xx not_active IP Right Cessation
  • 1979-10-11 US US06/196,763 patent/US4364617A/en not_active Expired - Lifetime
  • 1979-10-11 DE DE2953247A patent/DE2953247C1/de not_active Expired
  • 1979-10-11 DE DE792953247T patent/DE2953247A1/de active Pending
  • 1979-10-11 WO PCT/JP1979/000258 patent/WO1980000896A1/ja not_active Ceased
  • 1979-10-11 GB GB8017627A patent/GB2046989B/en not_active Expired

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