Integral oil tank sealing structure

Abstract

The utility model relates to the field of unmanned aerial vehicle fuel tanks, in particular to an integral fuel tank sealing structure which comprises a plurality of outer skins and a fuel tank bulkhead, the outer skins are of arc-shaped plate structures, the fuel tank bulkhead is a strip-shaped plate, the outer skins are sequentially installed on the fuel tank bulkhead in the length direction of the fuel tank bulkhead, and two rows of rivet holes are formed in the outer skins. Two rows of connecting holes are formed in the oil tank partition frame in the length direction, rivets are arranged on the outer skin and inserted into the rivet holes and the connecting holes, and a groove is formed in the oil tank partition frame and formed between the two rows of connecting holes. The device has the effect of improving the quality of glue injection between the outer skin and the oil tank bulkhead.

Description

Technical Field

[0001] This application relates to the field of unmanned aerial vehicle (UAV) fuel tanks, and more particularly to an integral fuel tank sealing structure. Background Technology

[0002] An integral fuel tank is a sealed system that utilizes the internal space of the fuselage or wing as the fuel tank, eliminating the need for a separate fuel tank structure. This integral fuel tank reduces the design cycle of the target drone and improves the utilization rate of its internal space.

[0003] The existing integral fuel tank is formed by splicing an outer skin and a fuel tank frame. The outer skin and the fuel tank frame are connected by rivets. Multiple outer skins abut against each other to form the drone body. In order to improve the connection strength of the outer skin and the sealing performance of the integral fuel tank, a sealing adhesive layer needs to be set between the outer skin and the fuel tank frame to bond the outer skin and the fuel tank frame together.

[0004] The aforementioned technical solutions have the following drawbacks: the outer skin and the fuel tank frame require glue injection and riveting, which takes a long time. After the glue injection is completed, glue leakage is easy, resulting in poor glue injection quality between the outer skin and the fuel tank frame and a dirty and messy workpiece surface. Utility Model Content

[0005] To improve the quality of adhesive injection between the outer skin and the fuel tank frame, this application provides an integral fuel tank sealing structure.

[0006] The integral fuel tank sealing structure provided in this application adopts the following technical solution:

[0007] An integral fuel tank sealing structure includes multiple outer skins and a fuel tank frame. The outer skins are arc-shaped plate structures, and the fuel tank frame is a strip plate. The multiple outer skins are sequentially installed on the fuel tank frame along its length. Two rows of rivet holes are provided on the outer skins, and two rows of connecting holes are provided on the fuel tank frame along its length. Rivets are provided on the outer skins and are inserted into the rivet holes and connecting holes. A groove is provided on the fuel tank frame between the two rows of connecting holes.

[0008] By adopting the above technical solution, grooves are opened on the fuel tank bulkhead. After the outer skin is connected to the fuel tank bulkhead, the grooves and the outer skin form a continuous channel. Users can inject glue into the grooves at the ends of the fuel tank bulkhead, allowing the glue to flow and fill the grooves. This bonding and fixing of multiple outer skins on the fuel tank bulkhead to the fuel tank bulkhead. When the glue overflows from the grooves, it is located between the outer skins and the fuel tank bulkhead, reducing the chance of glue overflowing and soiling the surface of the outer skin, and improving the glue injection quality.

[0009] Optionally, a skin locking device is detachably connected to the outer skin, and the skin locking device is connected to two adjacent outer skins. The skin locking device is used to tighten the two adjacent outer skins.

[0010] By adopting the above technical solution, by setting a skin locking device on the outer skin, the skin locking device is connected to the two outer skins at both ends of the tank bulkhead. By tightening the two outer skins, the tank bulkhead can be taut to form a ring. At this time, the multiple outer skins are spaced relatively close to each other on the tank bulkhead, thus achieving the effect of fixing the outer skins.

[0011] Optionally, the skin locking device includes two clamping members and a connecting bolt. The clamping members are detachably connected to the outer skin, and the connecting bolt is threadedly connected to the two clamping members. The connecting bolt is used to make the two clamping members move towards each other or away from each other.

[0012] By adopting the above technical solution, connecting bolts are provided on the clamping parts, and the connecting bolts are threadedly connected to the two clamping parts. The two clamping parts can be provided with threaded holes with opposite directions of rotation. When the connecting bolts are rotated, the two clamping parts can move towards each other or away from each other, so that the outer skin can move closer to each other, which is convenient and labor-saving.

[0013] Optionally, the clamping member has a clamping groove, the outer skin is inserted into the clamping groove, and the clamping member is provided with a plurality of mounting bolts, which penetrate the clamping member and the outer skin.

[0014] By adopting the above technical solution, a clamping groove is opened on the clamping component, allowing the outer skin to be inserted into the clamping groove. At this time, the mounting bolt is inserted into the through hole of the clamping component and the outer skin, so that the clamping component and the outer skin are snapped together by the mounting bolt, thereby improving the connection strength between the clamping component and the outer skin.

[0015] Optionally, the length direction of the connecting bolt is tangent to the arc formed by the outer skin.

[0016] By adopting the above technical solution, the connecting bolts are made tangent to the two clamping parts. When the connecting bolts tighten the two outer skins, the two outer skins and the two clamping parts are subjected to uniform force, thereby reducing the probability of damage and deformation caused by excessive force on a single outer skin and clamping part.

[0017] Optionally, an injection component is detachably connected to the outer skin, and an injection groove is provided on the injection component. One end of the injection groove is connected to the groove at the end of the fuel tank frame.

[0018] By adopting the above technical solution, a glue injection component is detachably connected to the outer skin, and a glue injection groove is opened on the glue injection component. When the glue injection component is installed on the outer skin, one end of the glue injection hole is aligned with the end of the groove, and the user can inject glue into the groove through the glue injection groove. When the glue injection mechanism is large, it can conveniently and effortlessly inject glue into the groove. During the glue injection process, the end of the fuel tank partition frame is in close contact with the glue injection component, which can reduce the chance of glue leakage between the glue injection component and the fuel tank partition frame.

[0019] Optionally, the openings at both ends of the glue injection groove are oriented perpendicularly to each other.

[0020] By adopting the above technical solution and making the two sides of the glue injection groove vertical, when the glue injection part is installed on the outer skin, the user can insert the nozzle of the glue injection mechanism into one end of the glue injection groove, so that the larger glue injection mechanism can be easily and quickly connected to the glue injection groove of the glue injection part.

[0021] Optionally, the injection molding part is connected to a plurality of mounting bolts 2, which penetrate the injection molding part and are threadedly connected to the outer skin.

[0022] By adopting the above technical solution and setting mounting bolt 2 on the glue injection part, the glue injection part can be stably connected to the outer skin. When the glue is squeezed into the groove through the glue injection groove, the probability of the glue injection part being subjected to stress and falling off the outer skin can be reduced.

[0023] In summary, the beneficial technical effects of this application are as follows:

[0024] 1. By creating grooves on the tank bulkhead, after the outer skin is connected to the tank bulkhead, the grooves and the outer skin form a continuous channel. Users can inject glue into the grooves at the ends of the tank bulkhead, allowing the glue to flow and fill the grooves, thereby bonding and fixing multiple outer skins on the tank bulkhead to the tank bulkhead. When the glue overflows from the grooves, it is located between the outer skin and the tank bulkhead, reducing the chance of glue overflowing and soiling the surface of the outer skin, and improving the glue injection quality.

[0025] 2. By setting skin locking devices on the outer skin, the skin locking devices are connected to the two outer skins at both ends of the tank bulkhead. By tightening the two outer skins, the tank bulkhead can be tightened to form a ring. At this time, the multiple outer skins are spaced relatively close to each other on the tank bulkhead, thus achieving the effect of fixing the outer skins.

[0026] 3. By detachably connecting the glue injection component to the outer skin, and opening a glue injection groove on the glue injection component, when the glue injection component is installed on the outer skin, one end of the glue injection hole is aligned with the end of the groove, and the user can inject glue into the groove through the glue injection groove. When the glue injection mechanism is large, it can conveniently and effortlessly inject glue into the groove. During the glue injection process, the end of the fuel tank partition frame is in close contact with the glue injection component, which can reduce the chance of glue leakage between the glue injection component and the fuel tank partition frame. Attached Figure Description

[0027] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application.

[0028] Figure 2 This is a schematic diagram of the structure of the fuel tank partition frame according to an embodiment of this application.

[0029] Figure 3 This is a schematic diagram of the structure of the clamping member according to an embodiment of this application.

[0030] Figure 4 This is a cross-sectional view of the glue-dispensing component according to an embodiment of this application.

[0031] Reference numerals: 1. Outer skin; 11. Rivet hole; 12. Rivet; 2. Fuel tank frame; 21. Groove; 22. Connecting hole; 3. Skin locking device; 31. Clamping component; 311. Clamping groove; 312. Mounting bolt one; 32. Connecting bolt; 4. Injection part; 41. Injection groove; 42. Mounting bolt two. Detailed Implementation

[0032] The present application is further described in detail below with reference to the accompanying drawings.

[0033] This application discloses an integral fuel tank sealing structure, referring to... Figure 1 , Figure 2 and Figure 3 The system includes multiple outer skins 1, a fuel tank frame 2, skin locking devices 3, and adhesive injection components 4. The outer skins 1 are curved plates, and the fuel tank frame 2 is a strip-shaped plate. The skin locking devices 3 are installed at both ends of the fuel tank frame 2, tightening it to form a ring structure. Multiple outer skins 1 abut against each other and are arranged sequentially along the length of the fuel tank frame 2. A groove 21 is provided in the middle of the fuel tank frame 2, extending along its length. When the outer skins 1 are connected to the fuel tank frame 2, a continuous channel is formed between them. The adhesive injection components 4 are installed at the ends of the fuel tank frame 2, and each component has an adhesive injection groove 41 connected to the groove 21. Users can press adhesive into the groove 21 through the adhesive injection groove 41, thus bonding the outer skins 1 and the fuel tank frame 2 together, completing the adhesive injection process.

[0034] Reference Figure 1 and Figure 2 The outer skin 1 has multiple rivet holes 11, which are equidistantly spaced along the width of the outer skin 1. The fuel tank frame 2 has multiple connecting holes 22, which are equidistantly spaced along the length of the fuel tank frame 2. When the outer skin 1 is connected to the fuel tank frame 2, the rivet holes 11 and connecting holes 22 on the outer skin 1 correspond one-to-one. Rivets 12 are installed in the rivet holes 11 and are inserted into the rivet holes 11 and connecting holes 22, thereby fixing the outer skin 1 and the fuel tank frame 2 together.

[0035] Reference Figure 2The fuel tank frame 2 has two rows of connecting holes 22, and the outer skin 1 has two rows of rivet holes 11. The groove 21 is formed by bending the fuel tank frame 2 and is located between the two rows of connecting holes 22. When the groove 21 is filled with glue and the glue solidifies, it can reduce the probability of liquid flowing from one side of the groove 21 to the other side. Users can connect different outer skins 1 to the upper and lower rows of connecting holes 22 respectively, and inject glue into the groove 21 so that the sealant in the groove 21 seals the gap between the two outer skins 1, thereby reducing the probability of oil in the fuel tank flowing out from between the two outer skins 1.

[0036] Reference Figure 1 and Figure 3 The skin locking device 3 includes two clamping parts 31 and a connecting bolt 32. The two clamping parts 31 are respectively installed on two adjacent outer skins 1. The connecting bolt 32 is threadedly connected to the two clamping parts 31. The user moves the two clamping parts 31 towards each other through the connecting bolt 32, thereby bringing the outer skins 1 closer to each other with a smaller gap.

[0037] Reference Figure 1 and Figure 3 The clamping member 31 has a clamping groove 311 on one side, and the outer skin 1 can be inserted into the clamping groove 311. Multiple mounting bolts 312 are installed on the clamping member 31, passing through the clamping member 31 and the outer skin 1. The outer skin 1 and the clamping member 31 are detachably connected by the mounting bolts 312, thus facilitating the removal of the skin locking device 3 after the user completes the glue application.

[0038] Reference Figure 4 The glue injection component 4 is positioned between two adjacent outer skins 1. The glue injection component 4 is equipped with mounting bolts 42, which are threadedly connected to the outer skins 1. The glue injection component 4 adheres to the surface of the outer skins 1 and is detachably connected to them. The glue injection component 4 has a glue injection groove 41, which extends at a right angle. One end of the glue injection groove 41 is located on the outer surface of the glue injection component 4, and the other end connects to the end of the groove 21 on the fuel tank frame 2. Users can squeeze glue into the glue injection groove 41 from the outside of the outer skins 1, thus facilitating the glue injection process.

[0039] The implementation principle of this application embodiment is as follows: by setting the fuel tank partition 2 on the outer skin 1, the outer skin 1 and the fuel tank partition 2 are riveted together by rivets 12. When the outer skin 1 and the fuel tank partition 2 are connected, a continuous channel is formed in the middle of the fuel tank partition 2. By installing the glue injection part 4 on the outer skin 1, the glue injection part 4 is set at the end of the fuel tank partition 2. At this time, the user can inject glue into the groove 21 through the glue injection groove 41, thereby improving the glue injection efficiency.

[0040] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. An integral fuel tank sealing structure, characterized in that: It includes multiple outer skins (1) and a fuel tank frame (2). The outer skin (1) is an arc-shaped plate structure, and the fuel tank frame (2) is a strip plate. Multiple outer skins (1) are installed sequentially on the fuel tank frame (2) along the length direction. Two rows of rivet holes (11) are opened on the outer skin (1), and two rows of connecting holes (22) are opened along the length direction on the fuel tank frame (2). Rivets (12) are provided on the outer skin (1). The rivets (12) are inserted into the rivet holes (11) and the connecting holes (22). A groove (21) is opened on the fuel tank frame (2). The groove (21) is opened between the two rows of connecting holes (22).

2. The integral fuel tank sealing structure according to claim 1, characterized in that: A skin locking device (3) is detachably connected to the outer skin (1). The skin locking device (3) is connected to two adjacent outer skins (1) and is used to tighten the two adjacent outer skins (1).

3. The integral fuel tank sealing structure according to claim 2, characterized in that: The skin locking device (3) includes two clamping parts (31) and a connecting bolt (32). The clamping parts (31) are detachably connected to the outer skin (1), and the connecting bolt (32) is threadedly connected to the two clamping parts (31). The connecting bolt (32) is used to make the two clamping parts (31) move towards each other or away from each other.

4. The integral fuel tank sealing structure according to claim 3, characterized in that: The clamping member (31) has a clamping groove (311) and the outer skin (1) is inserted into the clamping groove (311). The clamping member (31) is provided with a plurality of mounting bolts (312), which penetrate the clamping member (31) and the outer skin (1).

5. The integral fuel tank sealing structure according to claim 4, characterized in that: The length direction of the connecting bolt (32) is tangent to the arc formed by the outer skin (1).

6. The integral fuel tank sealing structure according to claim 1, characterized in that: The outer skin (1) is detachably connected to a glue injection component (4), which has a glue injection groove (41) on it. One end of the glue injection groove (41) is connected to the groove (21) at the end of the oil tank frame (2).

7. The integral fuel tank sealing structure according to claim 6, characterized in that: The openings at both ends of the glue injection groove (41) are perpendicular to each other.

8. The integral fuel tank sealing structure according to claim 7, characterized in that: The injection part (4) is connected to a plurality of mounting bolts (42), which penetrate the injection part (4) and are threadedly connected to the outer skin (1).

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