CN203908770U - Floater valve unlatching position detection tool - Google Patents

Abstract

The utility model provides a floater valve unlatching position detection tool, and aims at solving problems that a method of directly performing detection in an aircraft fuel tank environment is complicated in operation steps and difficult in installation of instruments and equipment. The floater valve unlatching position detection tool comprises an upper shell and a lower shell. The upper shell has an inverted sleeve structure. The top cap of the upper shell is provided with a floater positioning mechanism. The side wall of the upper shell is provided with an upper shell observation window. The lower shell has a tubular structure. The side wall of the lower shell is provided with a lower shell observation window. The detected floater valve device is installed in an upper shell sleeve. After the upper shell and the lower shell are snap-fit, the upper shell sleeve and the detected floater valve device are arranged in the internal cavity of the lower shell. Aviation fuel is injected in the lower shell so that a detection environment simulating an aircraft fuel tank is formed. Operation for detecting the floater valve unlatching position of the aircraft fuel tank can be rapidly and accurately completed so that safety flight of aircrafts is guaranteed.

Description

A kind of float valve open site testing tool

Technical field

The utility model relates to a kind of testing tool and method, and especially a kind of testing tool and detection method to float valve open site in aircraft fuel tank, belongs to test, field of measuring technique.

Background technology

In aircraft fuel tank, the control of oil mass is for ensureing that aircraft security flight is extremely important, and the control of oil mass is to realize by the float valve in fuel tank and the associated working of pressure filling control valve in aircraft fuel tank, in the time that fuel head in fuel tank is opened corresponding height lower than the float valve of setting, float valve falls under Action of Gravity Field, leave valve base, float valve is opened, and makes pressure filling control valve pressure release and opens, and fuel tank is carried out to pressure filling operation.

In order to ensure the accurate control to oil mass in aircraft fuel tank, before being delivered for use, aircraft must detect float valve open site, but, if adopt the method directly detecting in aircraft fuel tank environment, not only need in fuel tank, add a large amount of Aviation Fuels, operation steps is very loaded down with trivial details, and the installation of instrument and equipment is also very difficult, therefore be badly in need of a kind of energy of design simulated flight device fuel tank environment, be convenient to the specific purpose tool that float valve open site is detected, to separate the matter of great urgency of aircraft manufacture and maintenance company.

Utility model content

The purpose of this utility model is the drawback for prior art, provides a kind of by simulation fuel tank pasta environment, setting float valve opening and closing critical conditions, thereby completes quickly and accurately the float valve open site testing tool that detects operation.

Problem described in the utility model realizes with following technical proposals:

A kind of float valve open site testing tool, it comprises upper shell and lower house; Described upper shell is inverted tube-in-tube structure, and float detent mechanism is set on upper shell top cover, and upper shell observation window is set on upper shell sidewall; Described lower house is tubular structure, and lower house observation window is set on lower house sidewall; Detected float valve device is arranged in upper shell sleeve, and after upper shell and lower house fasten, upper shell sleeve and detected float valve device are placed in lower housing cavity, injects the testing environment of Aviation Fuel formation simulated flight device fuel tank in lower house.

Above-mentioned float valve open site testing tool, described float detent mechanism comprises location float lever, swivel nut, screw-thread bush and jackscrew; Described screw-thread bush is arranged on upper shell top cover in the mode of being spirally connected; Described swivel nut is with the mode of being spirally connected and screw-thread bush assembling; Described location float lever is sleeved on swivel nut inside with gap fiting mode, in the upper end of location float lever, the upper limit position block coordinating with swivel nut is set, and in the lower end of location float lever, the lower position block coordinating with screw-thread bush is set; Described jackscrew is arranged on upper shell sidewall, locates by jackscrew double thread lining locking.

Above-mentioned float valve open site testing tool, described upper shell is also provided with the fin coordinating with lower house, and described fin is arranged symmetrically on upper shell sidewall, and its height is consistent with upper shell cap height.

Above-mentioned float valve open site testing tool, the lower house observation window place on described lower house sidewall is provided with rule.

The utility model coordinates to come simulated flight device fuel tank pasta environment by upper shell and lower house, has avoided directly in aircraft fuel tank environment detection method problems, the problem includes: complex operation step, instrument and equipment are installed the problems such as difficult, the utility model adopts reverse thinking mode, first will after workpiece to be detected and upper shell assembling, be inverted, make the float of float valve sagging at Action of Gravity Field, then the Aviation Fuel of certain pressure is provided to workpiece oil-in, by float detent mechanism, float valve free end position is regulated, itself and the float valve opening and closing critical conditions of setting are matched, and concordant with swivel nut upper surface as to the benchmark of determining float valve opening and closing critical conditions to locate float lever upper surface in float detent mechanism now, then will after upper shell and workpiece turning, be fastened in lower house, in lower house, inject Aviation Fuel, in the time that float lever upper surface, location is concordant with swivel nut upper surface, be the critical conditions of workpiece in float valve opening and closing, observe the fluid liquid level that under this state, rule shows, with examination criteria comparing, draw test result.In a word, the utility model can complete the detection operation of aircraft tank float valve opening position quickly and accurately, has solved the matter of great urgency of aircraft manufacture and maintenance company, has ensured the safe flight of aircraft.

Brief description of the drawings

Below in conjunction with accompanying drawing, the utility model is described in further detail.

Fig. 1 is the cross-sectional view of float valve open site testing tool;

Fig. 2 is the vertical view of float valve open site testing tool;

Fig. 3 is upper shell cross-sectional view;

Fig. 4 is A place structure enlarged drawing in Fig. 3;

Fig. 5 is location float lever structural representation;

Fig. 6 is upper shell vertical view;

Fig. 7 is lower house front view;

Fig. 8～Figure 12 detects operating process schematic diagram (for ease of explanation, in figure, float detent mechanism position being adjusted) to float valve open site.

In figure, each list of reference numerals is: 1, upper shell, 1-1, upper shell observation window, 1-2, upper shell top cover, 1-3, float detent mechanism, 1-3-1, screw-thread bush, 1-3-2, swivel nut, 1-3-3, location float lever, 1-3-3-1, upper limit platform, 1-3-3-2, lower limit platform, 1-3-4, jackscrew, 1-4, fin, 2, lower house, 2-1, lower house observation window, 2-2, rule, 3, float valve device.

Embodiment

Referring to Fig. 1, Fig. 2, Figure 12, the utility model comprises upper shell 1 and lower house 2; Described upper shell 1 is inverted tube-in-tube structure, and float detent mechanism 1-3 is set on upper shell top cover 1-2, and upper shell observation window 1-1 is set on upper shell sidewall; Described lower house 2 is tubular structure, and lower house observation window 2-1 is set on lower house sidewall; Detected float valve device 3 is arranged in upper shell sleeve, after upper shell 1 fastens with lower house 2, upper shell sleeve and detected float valve device 3 are placed in lower house 2 inner chambers, form the testing environment of simulated flight device fuel tank at the interior injection Aviation Fuel of lower house 2.

Referring to Fig. 3～Fig. 6, float detent mechanism 1-3 of the present utility model comprises location float lever 1-3-3, swivel nut 1-3-2, screw-thread bush 1-3-1 and jackscrew 1-3-4; Described screw-thread bush 1-3-1 is arranged on upper shell top cover 1-2 in the mode of being spirally connected; Described swivel nut 1-3-2 is with the mode of being spirally connected and screw-thread bush 1-3-1 assembling; Described location float lever 1-3-3 is sleeved on swivel nut 1-3-2 inside with gap fiting mode, upper end at location float lever 1-3-3 arranges the upper limit position block 1-3-3-1 coordinating with swivel nut 1-3-2, in the lower end of location float lever 1-3-3, the lower position block 1-3-3-2 coordinating with screw-thread bush 1-3-1 is set; Described jackscrew 1-3-4 is arranged on upper shell sidewall, locates by jackscrew 1-3-4 double thread lining 1-3-1 locking.

Referring to Fig. 6, upper shell 1 of the present utility model is also provided with the fin 1-4 coordinating with lower house 2, and described fin 1-4 is arranged symmetrically on upper shell sidewall, and its height is highly consistent with upper shell top cover 1-2.

Referring to Fig. 7, the utility model is provided with rule 2-2 at the lower house observation window 2-1 place of lower house 2.

Referring to Fig. 8～Figure 12, float valve of the present utility model open site detection method, adopt reverse thinking mode, first workpiece to be detected and upper shell 1 are assembled to rear inversion, make the float of float valve sagging at Action of Gravity Field, then the Aviation Fuel of certain pressure is provided to workpiece oil-in, by float detent mechanism 1-3, float valve free end position is regulated, itself and the float valve opening and closing critical conditions of setting are matched, and now to locate float lever 1-3-3 upper surface benchmark as determine float valve opening and closing critical conditions concordant with swivel nut 1-3-2 upper surface in float detent mechanism 1-3, then will after upper shell 1 and workpiece turning, be fastened in lower house 2, to the interior injection Aviation Fuel of lower house 2, in the time that float lever 1-3-3 upper surface, location is concordant with swivel nut 1-3-2 upper surface, be the critical conditions of workpiece in float valve opening and closing, observe the fluid liquid level that under this state, rule shows, with examination criteria comparing, draw test result.Its concrete operation step is: a, workpiece install: float valve device 3 to be detected is assembled with upper shell 1, and the oil-in on float valve device 3 is communicated with oil feed line, provide the Aviation Fuel of certain pressure by in-line for it, b, workpiece are inverted: the upper shell 1 after assembling with float valve device 3 to be detected is inverted to (as shown in Figure 8), c, float valve workpiece is opened determining of critical conditions: screw-thread bush 1-3-1 in float detent mechanism 1-3 is screwed in upper shell 1 inner chamber, drive location float lever 1-3-3 by the float jack-up of float valve, oil-in oil-feed speed on observation float valve device 3, in the time of setting value (oil-feed speed is not more than 30 droplets/minute) that oil-feed speed is examination criteria, by the screw-thread bush 1-3-1 locking location (as shown in Figure 9) of float detent mechanism 1-3, then, the position of Adjusting bolt Adjusting screw 1-3-2, make swivel nut 1-3-2 lower surface and float lever 1-3-3 lower surface, location concordant (as shown in Figure 10), d, upper and lower casing fasten: extract the oil feed line being communicated with oil-in on float valve device 3, then by upper shell 1 and workpiece turning, the fin 1-4 that upper shell 1 is arranged by symmetria bilateralis is mounted on the sidewall of lower house 2 (as shown in Figure 11), e, oiling: in lower house 2 inner chambers, inject Aviation Fuel, observe the change in location of location float lever 1-3-3, until float lever 1-3-3 upper surface, location is concordant with swivel nut 1-3-2 upper surface, stop oiling, determining of f, testing result: read the rule 2-2 reading (as shown in Figure 12) corresponding with fluid liquid level, and require to compare with examination criteria, when rule reading meets standard-required (rule reading is 15mm ± 2mm), detected workpiece is specification product, otherwise, be substandard product.

Claims (4)

1. a float valve open site testing tool, is characterized in that, it comprises upper shell (1) and lower house (2); Described upper shell (1) is inverted tube-in-tube structure, and float detent mechanism (1-3) is set on upper shell top cover (1-2), and upper shell observation window (1-1) is set on upper shell sidewall; Described lower house (2) is tubular structure, and lower house observation window (2-1) is set on lower house sidewall; Detected float valve device (3) is arranged in upper shell sleeve, after upper shell (1) fastens with lower house (2), upper shell sleeve and detected float valve device (3) are placed in lower house (2) inner chamber, inject the testing environment of Aviation Fuel formation simulated flight device fuel tank in lower house (2).

2. a kind of float valve according to claim 1 open site testing tool, is characterized in that, described float detent mechanism (1-3) comprises location float lever (1-3-3), swivel nut (1-3-2), screw-thread bush (1-3-1) and jackscrew (1-3-4); Described screw-thread bush (1-3-1) is arranged on upper shell top cover (1-2) in the mode of being spirally connected; Described swivel nut (1-3-2) is with the mode of being spirally connected and screw-thread bush (1-3-1) assembling; Described location float lever (1-3-3) is sleeved on swivel nut (1-3-2) inside with gap fiting mode, upper end at location float lever (1-3-3) arranges the upper limit position block (1-3-3-1) coordinating with swivel nut (1-3-2), in the lower end of location float lever (1-3-3), the lower position block (1-3-3-2) coordinating with screw-thread bush (1-3-1) is set; Described jackscrew (1-3-4) is arranged on upper shell sidewall, locates by jackscrew (1-3-4) double thread lining (1-3-1) locking.

3. a kind of float valve according to claim 1 and 2 open site testing tool, it is characterized in that, described upper shell (1) is also provided with the fin (1-4) coordinating with lower house (2), described fin (1-4) is arranged symmetrically on upper shell sidewall, and its height is highly consistent with upper shell top cover (1-2).

4. a kind of float valve according to claim 3 open site testing tool, is characterized in that, the lower house observation window (2-1) of described lower house (2) locates to be provided with rule (2-2).