CN210822808U

CN210822808U - Water feeding pipe sealing structure for aircraft clear water vehicle

Info

Publication number: CN210822808U
Application number: CN201921174385.8U
Authority: CN
Inventors: 苏正耀; 唐永伟
Original assignee: Wuxi Lanhang Airport Equipment Co ltd
Current assignee: Wuxi Lanhang Airport Equipment Co ltd
Priority date: 2019-07-24
Filing date: 2019-07-24
Publication date: 2020-06-23
Anticipated expiration: 2029-07-24

Abstract

The utility model discloses an aircraft clear water car aims at providing a filler pipe seal structure for aircraft clear water car, and its technical scheme main points are including the clear water tank, the intercommunication has the filler pipe on the clear water tank, be equipped with sealed lid on the filler pipe, the lateral wall at filler pipe top is opened there is the restriction annular, the embedded sealing rubber circle that is equipped with of restriction annular, the external diameter of sealing rubber circle is greater than the external diameter of filler pipe, sealed covering is equipped with locking Assembly. The utility model discloses an elastic property of sealing rubber circle for filler pipe and sealed lid can adapt to the ambient temperature change, thereby reduce filler pipe department and produce the possibility of leaking because expend with heat and contract with cold.

Description

Water feeding pipe sealing structure for aircraft clear water vehicle

Technical Field

The utility model relates to an aircraft clear water car, in particular to water feeding pipe seal structure for aircraft clear water car.

Background

The clear water vehicle is a self-propelled airport ground special device for providing clean drinking water for the airplane through vehicle-mounted equipment. The existing clear water vehicle for the airplane mainly comprises a transport vehicle and a clear water tank arranged on the transport vehicle, wherein the transport vehicle transports the clear water tank to a place where the airplane stops, and water supply for the airplane is realized.

At present, chinese patent No. CN200957764Y discloses an electric sewage cleaning and discharging vehicle for airports, which comprises a chassis, a clean water tank is arranged at the rear end of the chassis, and a water filling port and an access hole are arranged on the clean water tank. During the working process of the electric clear and sewage vehicle for the airport, clear water is added into the clear water tank through the water adding port, so that the clear water tank is filled with a clean water source for supplying to the airplane.

In the prior art, there are two common closing structures for a water filling port, one is flange connection, and the other is closed by a hinged sealing cover. However, in the actual use process, because the number of areas where the aircraft stays is large and the temperatures of all the areas are different, the water filling port is inevitably affected by the temperatures to generate the effect of expansion with heat and contraction with cold, and the effect can promote the volume change of the water filling port, so that the sealing performance of the water filling port is reduced.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a filler pipe seal structure for aircraft clear water car has and makes filler pipe and sealed lid adaptation ambient temperature change, reduces filler pipe department and produces the advantage of the possibility of leaking owing to expend with heat and contract with cold.

The above technical purpose of the present invention can be achieved by the following technical solutions:

the utility model provides a filler pipe seal structure for aircraft clear water car, includes the clear water tank, the intercommunication has the filler pipe on the clear water tank, be equipped with sealed lid on the filler pipe, the lateral wall at filler pipe top is opened there is the restriction annular, the embedded sealing rubber circle that is equipped with of restriction annular, the external diameter of sealing rubber circle is greater than the external diameter of filler pipe, sealed covering is equipped with locking Assembly.

Through adopting above-mentioned technical scheme, accomplish the back that fills water in towards the clear water tank through the filler pipe, the staff will seal the lid lock on the filler pipe to utilize locking Assembly to lock sealed lid and die. At the moment, the sealing rubber ring is extruded and is pressed between the inner side wall of the sealing cover and the outer side wall of the water filling pipe. When the cleaning vehicle needs to go in and out the great ground area of difference in temperature, filler pipe and sealed lid all can take place the change of volume because expend with heat and contract with cold principle, and the sealing rubber circle produces deformation along with the deformation of filler pipe and sealed lid this moment to this makes and remains throughout at encapsulated situation between sealed lid and the filler pipe, has reduced between filler pipe and the sealed lid because expend with heat and contract with cold and produce the possibility in gap.

Further, locking Assembly includes locking arm and locking screw, the lateral wall fixedly connected with support arm of filler pipe, the top of support arm is higher than the top of filler pipe, the one end of locking arm is rotated and is connected in the top of support arm, the caping of sealed lid articulates in the arm body of locking arm, the locking arm is kept away from the one end of support arm and is opened there is the fore shaft, locking screw rotates to be connected on the clear water tank, locking screw sets up with the support arm about the filler pipe is relative, threaded connection has the locking hand wheel on the locking screw.

Through adopting above-mentioned technical scheme, the staff is through rotating the locking arm for sealed lid lock is on the filler pipe. The staff rotates locking screw for the pole body of locking screw enters into the locking mouth, and the staff rotatory locking hand wheel this moment utilizes the pressure of locking hand wheel to compress tightly the locking arm, makes sealed lid compress tightly on the filler pipe with this, realizes the locking to sealed lid.

Further, the lateral wall fixedly connected with of sealed lid goes up the journal stirrup, the lateral wall fixedly connected with of filler pipe is the lower journal stirrup, when sealed lid lock is on the filler pipe, wear to be equipped with the safety lock on last journal stirrup and the lower journal stirrup.

Through adopting above-mentioned technical scheme, the insurance lock cooperates with the locking hand wheel jointly, has realized dying to the dual lock of sealed lid, has further reduced the unexpected possibility of opening of sealed lid.

Further, locking Assembly includes locking piece and buckle, sealed lid rotates to be connected in the filler pipe, locking piece fixed connection is in sealed lid and rotates the lateral wall of connecting in the filler pipe for it, when sealed lid lock on the filler pipe, the filler pipe is located fixedly connected with fixing base on the pipe shaft under the locking piece, the buckle rotates to be connected in the fixing base, it has the draw-in groove that supplies the buckle embedding to open on the locking piece.

Through adopting above-mentioned technical scheme, when sealed lid lock when the filler pipe, the staff rotates the buckle for the buckle cover is established in the draw-in groove on the locking piece, and with this realized dying the lock of sealed lid, reduced sealed lid from the unexpected possibility of opening on the filler pipe.

Furthermore, the top of the inner cavity of the sealing cover is provided with an elastic rubber ring, and when the sealing cover is buckled on the water feeding pipe, the elastic rubber ring is abutted to the top of the water feeding pipe.

Through adopting above-mentioned technical scheme, after sealed lid lock on the filler pipe, the elastic rubber circle receives the extrusion, and the extrusion changes the elastic rubber circle under the attitude and impels sealed lid to produce the motion trend of opening to this makes the buckle can the chucking in the draw-in groove more powerfully.

Furthermore, the top surface of elastic rubber circle is glued and is had the change inner ring, change inner ring threaded connection at the top of sealed lid inner chamber.

Through adopting above-mentioned technical scheme, change the mode that the inner ring passes through threaded connection, realized detachable connection. When the elastic rubber ring is aged, the worker can unscrew the replacement inner ring to replace the elastic rubber ring.

Further, separation blade under the lateral wall fixedly connected with of filler pipe, the separation blade is the level setting down, the separation blade is located the filler pipe and seals the below that the lid rotated the junction down, the separation blade is the decurrent quarter circular arc piece of opening down, the upper surface of sealed lid is equipped with the top suspension piece, the top suspension piece is on a parallel with the separation blade down, the top suspension piece is the opening towards the circular arc piece of the quarter of locking piece, the hook has the return rubber circle between top suspension piece and the lower separation blade.

Through adopting above-mentioned technical scheme, when sealed lid lock on the filler pipe to by the buckle lock when dying, the return rubber circle is stretched, and its self has elastic potential energy. When the sealing cover needs to be opened, a worker takes off the retaining ring from the locking block, and the resilience force of the return rubber ring pulls the sealing cover, so that the sealing cover tends to be opened upwards, and the physical force consumed when the worker opens the sealing cover is reduced.

Further, the bottom fixedly connected with locking plate of locking piece, the locking plate is located the below of sealed lid, one side that the fixing base deviates from the filler pipe is opened and is had the holding tank that is used for holding the locking plate, the both sides wall of the vertical direction of holding tank is opened respectively and is had first lockhole, the locking plate transversely link up has the second lockhole, when sealed lid lock is on the filler pipe, the locking plate is located the holding tank, and first lockhole communicates with each other with the second lockhole, and the restriction lever is worn to be equipped with in communicating first lockhole and the interior cunning of second lockhole.

Through adopting above-mentioned technical scheme, when sealed lid lock when the filler pipe, the locking plate pastes tightly in the holding tank, and first lockhole and second lockhole communicate with each other this moment, and the staff inserts the restriction pole in communicating first lockhole and the second lockhole to this locking to the locking of locking plate is realized. The limiting rod plays a role in safety, and when the retaining ring is accidentally separated from the locking block, the limiting rod can also lock the sealing cover.

Furthermore, the top of the outer side surface of the sealing rubber ring is provided with a chamfer.

Through adopting above-mentioned technical scheme, the chamfer has the guide effect, can make the sealing rubber circle more smoothly extruded between the inside wall of sealed lid and the lateral wall of filler pipe.

To sum up, the utility model discloses following beneficial effect has: when the cleaning vehicle needs to enter and exit a ground area with a large temperature difference, the sealing rubber ring deforms along with the deformation of the water feeding pipe and the sealing cover, so that the sealing cover and the water feeding pipe are always kept in a sealing state, and the possibility of generating a gap between the water feeding pipe and the sealing cover due to expansion with heat and contraction with cold is reduced.

Drawings

Fig. 1 is a schematic structural view of embodiment 1 for embodying the present invention;

FIG. 2 is an enlarged view of the portion A in FIG. 1 in embodiment 1;

FIG. 3 is a schematic structural view for embodying the locking assembly in embodiment 2;

fig. 4 is a schematic structural view for embodying the elastic rubber ring in example 2.

In the figure, 1, a clear water tank; 2. a water feeding pipe; 21. a limiting ring groove; 211. sealing the rubber ring; 22. a lower lug; 3. a sealing cover; 31. an upper lug; 32. replacing the inner ring; 321. an elastic rubber ring; 4. a locking assembly; 41. a lock arm; 42. locking the screw rod; 421. locking a hand wheel; 43. a support arm; 5. a safety lock; 61. a locking block; 611. a card slot; 612. a locking plate; 62. a retaining ring; 63. a fixed seat; 631. accommodating grooves; 64. a restraining bar; 7. a lower baffle plate; 71. a blocking piece is arranged; 72. and (5) returning the rubber ring.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Example 1: the utility model provides a filler pipe seal structure for aircraft clear water car, refers to fig. 1 and 2, including setting up clear water tank 1 on the transport vechicle, the intercommunication has filler pipe 2 on the clear water tank 1, and the lateral wall at filler pipe 2 top is opened there is limiting ring groove 21, at the embedded sealing rubber circle 211 that is equipped with of limiting ring groove 21, and the external diameter of sealing rubber circle 211 is greater than the external diameter of filler pipe 2.

Referring to fig. 1 and 2, a sealing cover 3 for fastening the water feeding pipe 2 is provided on the water feeding pipe 2, and after the sealing cover 3 is fastened to the water feeding pipe 2, a sealing rubber ring 211 is pressed between an inner side wall of the sealing cover 3 and an outer side wall of the water feeding pipe 2. In order to enable the seal cover 3 to smoothly pass through the seal rubber ring 211, the top of the outer side surface of the seal rubber ring 211 is chamfered.

Referring to fig. 1 and 2, the sealing rubber ring 211 is extruded to have elastic potential energy after being pressed between the outer side wall of the sealing cover 3 and the water adding pipe 2, when the aircraft fresh water truck enters and exits a region with large temperature change, the water adding pipe 2 and the sealing cover 3 are affected by thermal expansion and cold contraction to generate volume change, at the moment, because the sealing rubber ring 211 has good elastic performance, the sealing rubber ring 211 can be deformed along with the volume change of the water adding pipe 2 and the sealing cover 3, so that the sealing state between the sealing cover 3 and the water adding pipe 2 is always kept.

Referring to fig. 1 and 2, a locking assembly 4 for locking the sealing cover 3 on the water filling pipe 2 is arranged on the sealing cover 3, the locking assembly 4 comprises a locking arm 41 and a locking screw 42, a supporting arm 43 is fixedly connected to the outer side wall of the water filling pipe 2, and the top end of the supporting arm 43 is higher than the top of the water filling pipe 2. One end of the lock arm 41 is rotatably connected to the support arm 43, and the center position of the lid top of the sealing lid 3 is hinged to the arm body of the lock arm 41. The locking arm 41 is able to rotate about the support arm 43 to cause the sealing cap 3 to open from the filler pipe 2 or to close the filler pipe 2.

Referring to fig. 1 and 2, a locking opening is formed in one end, away from the supporting arm 43, of the locking arm 41, the locking screw 42 is rotatably connected to the clean water tank 1, the locking screw 42 and the supporting arm 43 are arranged opposite to each other with respect to the water feeding pipe 2, and a locking hand wheel 421 is connected to the locking screw 42 in a threaded manner. After the sealing cover 3 is buckled on the water adding pipe 2, the worker turns over the locking screw rod 42, so that the rod body of the locking screw rod 42 is positioned in the locking opening, and the locking hand wheel 421 is positioned above the locking arm 41. Then, the worker screws the locking hand wheel 421 to move the locking hand wheel 421 downwards, and in the process of moving downwards, the locking hand wheel 421 presses the locking arm 41, and the locking arm 41 applies pressure to the sealing cover 3, so that the sealing cover 3 is firmly buckled on the water adding pipe 2.

Referring to fig. 1 and 2, an upper lug 31 is fixedly connected to a side wall of the sealing cover 3, a lower lug 22 is fixedly connected to an outer side wall of the water feeding pipe 2, when the sealing cover 3 is fastened on the water feeding pipe 2, the upper lug 31 and the lower lug 22 are attached to each other, and a safety lock 5 is inserted between the attached upper lug 31 and the attached lower lug 22. The safety lock 5 plays a safety role, and reduces the possibility that the sealing cover 3 is accidentally opened.

The specific implementation process comprises the following steps: after injecting sufficient water into the clear water tank 1 through the filler pipe 2, the staff rotates the locking arm 41, and the locking arm 41 drives the sealing cover 3 to be buckled on the filler pipe 2. The locking screw 42 is turned over at the moment, so that the locking screw 42 enters the locking port, then the worker twists the locking hand wheel 421, the locking arm 41 is pressed by the locking hand wheel 421, the locking arm 41 transmits the pressure of the locking hand wheel 421 to the sealing cover 3, and the sealing cover 3 is firmly buckled on the water adding pipe 2. Finally, the worker inserts the safety lock 5 between the upper support lug 31 and the lower support lug 22, so as to complete the sealing of the water adding pipe 2.

When the sealing cover 3 is buckled on the water adding pipe 2, the sealing rubber ring 211 is in a compressed state and has elastic potential energy. When the aircraft fresh water vehicle enters and exits a region with large temperature difference, the sealing rubber ring 211 can automatically compensate the deformation of the sealing cover 3 and the water adding pipe 2 caused by expansion with heat and contraction with cold, so that the sealing cover 3 and the water adding pipe 2 are always kept in a sealing state.

Example 2: the utility model provides a filler pipe seal structure for aircraft clear water car, refers to figure 1, including setting up clear water tank 1 on the transport vechicle, the intercommunication has filler pipe 2 on the clear water tank 1, and the lateral wall at filler pipe 2 top is opened has limiting ring groove 21 (refer to figure 3), and the embedded sealing rubber circle 211 that is equipped with of limiting ring groove 21 (refer to figure 3), and the external diameter of sealing rubber circle 211 is greater than the external diameter of filler pipe 2.

Referring to fig. 3, a sealing cover 3 for fastening the water feeding pipe 2 is provided on the water feeding pipe 2, and after the sealing cover 3 is fastened to the water feeding pipe 2, a sealing rubber ring 211 is pressed between an inner side wall of the sealing cover 3 and an outer side wall of the water feeding pipe 2. In order to enable the sealing cover 3 to smoothly pass through the sealing rubber ring 211, a chamfer is provided at the top of the outer side surface of the sealing rubber ring 211.

Referring to fig. 3, the sealing rubber ring 211 is extruded to have elastic potential energy between the outer side wall of the sealing cover 3 and the water adding pipe 2, when the aircraft fresh water truck enters and exits a region with large temperature change, the water adding pipe 2 and the sealing cover 3 are affected by thermal expansion and cold contraction to generate volume change, at the moment, because the sealing rubber ring 211 has good elastic performance, the sealing rubber ring 211 can be deformed along with the volume change of the water adding pipe 2 and the sealing cover 3, so that the sealing cover 3 and the water adding pipe 2 are always kept in a sealing state.

Referring to fig. 4, a locking assembly 4 for locking the sealing cap 3 to the filler pipe 2 is provided on the sealing cap 3, and the locking assembly 4 includes a locking piece 61 and a retaining ring 62. The sealing cover 3 is rotatably connected to the water feeding pipe 2 through a bracket, and the locking block 61 is fixedly connected to the sealing cover 3 and is rotatably connected to the outer side wall of the water feeding pipe 2 relative to the sealing cover. When the sealing cover 3 is buckled on the water feeding pipe 2, the water feeding pipe 2 is fixedly connected with a fixing seat 63 on the pipe body right below the locking block 61, and the retaining ring 62 is rotatably connected with the fixing seat 63. The locking piece 61 is a circular piece, and the outer side wall of the circumference of the locking piece is provided with a clamping groove 611 for the retaining ring 62 to be embedded in.

Referring to fig. 4, when the water feeding pipe 2 needs to be sealed, a worker rotates the sealing cover 3 to enable the sealing cover 3 to be buckled on the water feeding pipe, at this time, the locking block 61 is located on the fixing seat 63, the worker rotates the retaining ring 62 to enable the retaining ring 62 to be embedded into the clamping groove 611, and the retaining ring 62 can pull the locking block 61. The sealing cap 3 achieves sealing on the filler pipe 2 by tightening the snap ring 62.

Referring to fig. 4, there is a change inner ring 32 at the top of the inner cavity of the sealing cover 3, the bottom surface of the change inner ring 32 is glued with an elastic rubber ring 321, the setting of the change inner ring 32 enables the elastic rubber ring 321 to be detached from the sealing cover 3, and when the elastic rubber ring 321 is out of service due to aging, the worker can replace the elastic rubber ring 321 by detaching the change inner ring 32. When the sealing cover 3 is buckled on the water filling pipe 2, the elastic rubber ring 321 is abutted to the top of the water filling pipe 2, at the moment, the elastic rubber ring 321 is in a compressed state, the elastic potential energy of the elastic rubber ring promotes the sealing cover 3 to generate an upward movement trend, the trend enables the abutting force between the retaining ring 62 and the locking block 61 to be strengthened, and therefore the locking force between the retaining ring 62 and the locking block 61 is strengthened.

Referring to fig. 4, a locking plate 612 is fixedly connected to the bottom of the locking block 61, and in a spatial position, the locking plate 612 is located below the sealing cover 3, and an accommodating groove 631 for accommodating the locking plate 612 is formed in a surface of the fixing seat 63 facing away from the water feeding pipe 2. The two side walls of the receiving groove 631 in the vertical direction are respectively provided with a first locking hole, and the locking plate 612 transversely penetrates through a second locking hole.

Referring to fig. 4, when the sealing cover 3 is fastened to the water feeding pipe 2, the locking plate 612 is located in the receiving groove 631, the first locking hole is communicated with the second locking hole, and the limiting rod 64 is slidably disposed in the communicated first locking hole and the second locking hole. The limiting rod 64 can further strengthen the connection between the locking block 61 and the fixing seat 63, so that the stability of the sealing cover 3 buckled on the water filling pipe 2 is further improved, and the possibility that the sealing cover 3 is accidentally opened from the water filling pipe 2 is reduced.

Referring to fig. 3, a lower baffle 7 is fixedly connected to the outer side wall of the water feeding pipe 2, and the lower baffle 7 is horizontally arranged. The lower baffle 7 is positioned below the rotary joint of the water adding pipe 2 and the sealing cover 3, and the lower baffle 7 is a quarter arc sheet with a downward opening. The upper surface of the sealing cover 3 is provided with an upper baffle piece 71, the upper baffle piece 71 is parallel to the lower baffle piece 7, and the upper baffle piece 71 is a circular arc piece with an opening facing one fourth of the locking piece 61. A return rubber ring 72 is hooked between the upper baffle plate 71 and the lower baffle plate 7.

Referring to fig. 3, when the sealing cap 3 is sealed to the filler pipe 2, the return rubber ring 72 is elongated and has a strong resilient force inside thereof. When the limiting rod 64 and the retaining ring 62 are detached by an opening worker, the resilience force of the return rubber ring 72 is released, and the resilience force urges the sealing cover 3 to have a tendency to open, thereby reducing the difficulty of the worker opening the sealing cover 3.

The specific implementation process comprises the following steps: after injecting sufficient water into the clear water tank 1 through the filler pipe 2, the staff rotates the sealed lid 3 for the sealed lid 3 lock is on the filler pipe 2. Then, the retaining ring 62 is turned over, so that the retaining ring 62 grips the locking block 61 and is inserted into the slot 611. At this time, the locking piece 612 is located in the receiving groove 631, and the worker inserts the limiting rod 64 into the first locking hole and the second locking hole which are communicated with each other, so that the sealing cover 3 is firmly fastened on the water adding pipe 2, thereby completing the sealing of the water adding pipe 2.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications to the present embodiment without inventive contribution as required after reading the present specification, but all of them are protected by patent laws within the scope of the claims of the present invention.

Claims

1. The utility model provides a filler pipe seal structure for aircraft clear water car, includes clear water tank (1), the intercommunication has filler pipe (2) on clear water tank (1), be equipped with sealed lid (3) on filler pipe (2), its characterized in that: the lateral wall at filler pipe (2) top is opened there is restriction annular (21), the embedded sealing rubber circle (211) that is equipped with in restriction annular (21), the external diameter of sealing rubber circle (211) is greater than the external diameter of filler pipe (2), be equipped with locking Assembly (4) on sealed lid (3).

2. The filler tube sealing structure for an aircraft fresh water truck as set forth in claim 1, wherein: locking Assembly (4) are including locking arm (41) and locking screw (42), lateral wall fixedly connected with support arm (43) of filler pipe (2), the top of support arm (43) is higher than the top of filler pipe (2), the one end of locking arm (41) is rotated and is connected in the top of support arm (43), the caping of sealed lid (3) articulates in the arm body of locking arm (41), the locking mouth has been opened to the one end that support arm (43) were kept away from in locking arm (41), locking screw (42) are rotated and are connected on clean water tank (1), locking screw (42) set up with support arm (43) relatively about filler pipe (2), threaded connection has locking hand wheel (421) on locking screw (42).

3. The filler pipe sealing structure for an aircraft fresh water truck as set forth in claim 2, wherein: the lateral wall fixedly connected with of sealed lid (3) goes up journal stirrup (31), journal stirrup (22) under the lateral wall fixedly connected with of filler pipe (2), when sealed lid (3) lock is on filler pipe (2), wear to be equipped with safety lock (5) on last journal stirrup (31) and lower journal stirrup (22).

4. The filler tube sealing structure for an aircraft fresh water truck as set forth in claim 1, wherein: locking Assembly (4) are including locking piece (61) and buckle (62), sealed lid (3) rotate to be connected in filler pipe (2), locking piece (61) fixed connection is in sealed lid (3) and rotates the lateral wall of connecting in filler pipe (2) for it, when sealed lid (3) lock is on filler pipe (2), filler pipe (2) are located fixedly connected with fixing base (63) on the pipe body under locking piece (61), buckle (62) rotate to be connected in fixing base (63), open draw-in groove (611) that supply buckle (62) embedding on locking piece (61).

5. The filler tube sealing structure for an aircraft fresh water truck as set forth in claim 4, wherein: the top of the inner cavity of the sealing cover (3) is provided with an elastic rubber ring (321), and when the sealing cover (3) is buckled on the water adding pipe (2), the elastic rubber ring (321) is abutted to the top of the water adding pipe (2).

6. The filler tube sealing structure for an aircraft fresh water truck as set forth in claim 5, wherein: the top surface of elastic rubber circle (321) is glued with and is changed inner ring (32), change inner ring (32) threaded connection is at the top of sealed lid (3) inner chamber.

7. The filler tube sealing structure for an aircraft fresh water truck as set forth in claim 4, wherein: separation blade (7) under the lateral wall fixedly connected with of filler pipe (2), separation blade (7) are the level setting down, separation blade (7) are located filler pipe (2) and sealed lid (3) and rotate the below of junction down, separation blade (7) are the decurrent quarter circular arc piece of opening down, the upper surface of sealed lid (3) is equipped with top suspension piece (71), top suspension piece (71) are on a parallel with bottom suspension piece (7), top suspension piece (71) are the opening towards the circular arc piece of the quarter of locking piece (61), it has return rubber circle (72) to hook between top suspension piece (71) and bottom suspension piece (7).

8. The filler tube sealing structure for an aircraft fresh water truck as set forth in claim 4, wherein: the bottom fixedly connected with locking plate (612) of locking piece (61), locking plate (612) are located the below of sealed lid (3), holding tank (631) that is used for holding locking plate (612) are opened to one side that fixing base (63) deviate from filler pipe (2), first lockhole has been opened respectively to the both sides wall of holding tank (631) vertical direction, locking plate (612) transversely link up has the second lockhole, when sealed lid (3) lock is on filler pipe (2), locking plate (612) are located holding tank (631), and first lockhole communicates with each other with the second lockhole, and restriction pole (64) are worn to be equipped with in communicating first lockhole and the internal sliding of second lockhole.

9. The filler tube sealing structure for an aircraft fresh water truck as set forth in claim 1, wherein: and a chamfer is arranged at the top of the outer side surface of the sealing rubber ring (211).