Small aircraft fuel tank draining valve switch

A technology for a fuel discharge valve and a small aircraft, which is applied to the fuel tank of a power plant, etc., can solve the problems of poor sealing effect, inconvenient switch operation and low maintenance, and achieve the effect of good sealing, convenient operation and strong maintenance.

Inactive Publication Date: 2015-04-08
石家庄飞机工业有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a small aircraft oil drain valve switch device to solve the problems of inconvenient operation, poor sealing effect and low maintainability of the existing fuel tank oil drain valve switch

Method used

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  • Small aircraft fuel tank draining valve switch
  • Small aircraft fuel tank draining valve switch

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Embodiment Construction

[0015] The present invention will be further described below in conjunction with the accompanying drawings.

[0016] See attached figure 1 And attached figure 2 , this embodiment includes an external shell 5, a base 6 pierced on the shell 5, a valve core 2 set on the base 6, and a compression bolt 7 connected to the bottom of the base 6. The compression bolt 7 The middle part is provided with an axial through hole 11 for oil discharge;

[0017] The valve core 2 is a columnar structure, and its lower part is a tapered thimble 9, and the tapered thimble 9 extends into the through hole 11. The valve core 2 is provided with a shaft shoulder 10, and the shaft shoulder 10 and the A first sealing ring 3 to prevent oil leakage is provided between the upper end surfaces of the compression bolts 7 ; a sealing gasket 8 is provided between the compression bolts 7 and the lower end surface of the base 6 .

[0018] The base 6 is a hollow structure, the central axial position is set in a...

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PUM

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Abstract

The invention discloses a small aircraft fuel tank draining valve switch. The switch comprises a shell, a base which passes on the shell, a valve core which is arranged on the base and a pressure bolt with an axial through hole in the middle, wherein the valve core is cylindrical, the lower part of the valve core is a conical thimble, the thimble extends into the through hole, a shaft shoulder is arranged on the valve core, a sealing ring capable of preventing oil leakage is arranged between the shaft shoulder and the upper end surface of the pressure bolt; the valve core passes through the middle of the base, a first spring is sleeved on the outer part of the valve core, and the lower part of the first spring is arranged on the shaft shoulder. The thimble is arranged on the lower part of the valve core, the through hole is arranged in the middle of the pressure bolt, and the first sealing ring is added. In the prior art, the bolt should be unscrewed to drain fuel, and in the invention it is only necessary to use a tool to jack up the thimble, so that the fuel is drained through the bolt through hole, the thimble is loosed, and the draining valve is closed. The draining valve switch is safe and reliable, is good in reliability and convenient to operate, and the maintainability and safety of aircrafts are greatly improved.

Description

technical field [0001] The invention relates to a small-sized aircraft oil tank oil discharge valve switch. Background technique [0002] The aircraft fuel tank provides fuel for the aircraft engine under various conditions, and the quality of the aircraft fuel has a major impact on the safety of the aircraft. The fuel drain valve switch is generally located at the lowest point of the fuel tank, and the fuel in the fuel tank is released through the fuel drain valve switch to check the quality of the fuel. This requires the oil drain valve switch to have the characteristics of flexible and convenient operation, good maintainability, and strong sealing. [0003] The oil drain valve switch of the existing fuel tank is installed at the lowest part of the fuel tank, and its structure is relatively complicated. When the oil drain operation is required, the compression device needs to be loosened to drain the oil. Since it needs to be operated frequently, the sealing effect will be...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B64D37/20
Inventor 汤雪莲崔章栋孙凤琴田银桥李强李军郭桂杰
Owner 石家庄飞机工业有限责任公司
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