Leakage detection sealing device for plastic fuel tank

Abstract

The utility model discloses a leak detection sealing device for a plastic fuel tank. The leak detection sealing device comprises a shaft core, an elastic sealing ring, a moving sleeve, a handle connecting seat, a handle and a connecting piece, wherein the diameter of the elastic sealing ring is matched with the inner diameter of an oil filling port of the plastic fuel tank; wherein the elastic sealing ring and the moving sleeve are both arranged on the shaft core in a sleeving mode, and one end of the moving sleeve abuts against one end of the elastic sealing ring; the shaft core is provided with a limiting module which abuts against the other end of the elastic sealing ring. The handle connecting base is rotationally connected with the end, away from the limiting module, of the shaft core, and the handle connecting base is connected with the moving sleeve through a connecting piece. And the handle is connected with the handle connecting seat. The sealing device can ensure the sealing performance of the blocked oil filling port of the plastic fuel tank, and can adapt to various oil filling ports of the plastic fuel tank with different inner diameters (the inner diameters of the oil filling ports are not different).

Description

Technical Field

[0001] The utility model relates to the technical field of leak detection and sealing equipment, in particular to a leak detection and sealing device for plastic fuel tanks. Background Art

[0002] Plastic fuel tanks are an important part of automotive components and are widely used due to their light weight, corrosion resistance, high safety, etc. The sealing detection of plastic fuel tanks is an important link to ensure their performance, because the sealing directly relates to the safety and environmental protection of plastic fuel tanks.

[0003] In the prior art, the sealing performance of plastic fuel tanks is detected by the bubbling method, that is, after blocking the fuel filling port of the plastic fuel tank, the plastic fuel tank is put into water, and then it is observed whether there are bubbles in the water to judge its sealing performance. In this detection process, how to completely seal the fuel filling port of the plastic fuel tank is particularly important. If the sealing is not complete, it will affect the sealing detection result of the plastic fuel tank. Moreover, even if the fuel filling port of the plastic fuel tank is completely sealed, when there are bubbles in the water, it is impossible to quickly detect where the leakage point is. Summary of the Invention

[0004] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a leak detection and sealing device for plastic fuel tanks with good sealing performance and capable of adapting to the fuel filling ports of plastic fuel tanks with a variety of different inner diameters.

[0005] To achieve the above purpose, the technical solution provided by the utility model is as follows:

[0006] A leak detection and sealing device for plastic fuel tanks includes a shaft core, an elastic sealing ring with a diameter matching the inner diameter of the fuel filling port of the plastic fuel tank, a moving sleeve, a handle connecting seat, a handle, and a connecting piece;

[0007] Wherein, both the elastic sealing ring and the moving sleeve are sleeved on the shaft core, and one end of the moving sleeve abuts against one end of the elastic sealing ring;

[0008] A limiting module is provided on the shaft core to abut against the other end of the elastic sealing ring;

[0009] The handle connecting seat is rotatably connected to the end of the shaft core away from the limiting module, and the handle connecting seat is connected to the moving sleeve through a connecting piece;

[0010] The handle is connected to the handle connecting seat.

[0011] In this technical solution, the operator holds the handle and moves the elastic sealing ring in the plastic fuel tank leak detection and sealing device into the fuel filling port of the plastic fuel tank. Then, the handle is rotated in a direction away from the elastic sealing ring, thereby driving the handle connecting seat to rotate relative to the shaft core, and driving the moving sleeve to move towards the limiting module under the cooperation of the connecting member, so that the inner side of the elastic sealing ring is closely attached to the shaft core and the outer side is closely attached to the inner wall of the fuel filling port of the plastic fuel tank under the extrusion of the limiting module and the moving sleeve, thus ensuring the sealing of the fuel filling port of the plastic fuel tank and being able to adapt to the fuel filling ports of various plastic fuel tanks with different inner diameters (the difference in the inner diameters of the fuel filling ports is not large).

[0012] Furthermore, it also includes an air inlet joint connected to an external air inlet pipeline;

[0013] An air delivery channel is provided inside the shaft core;

[0014] The air inlet joint is connected to one end of the shaft core close to the handle connecting seat;

[0015] The air delivery channel is communicated with the air inlet joint.

[0016] In this technical solution, compressed air is input into the plastic fuel tank through the air inlet joint and the air delivery channel, so that when bubbles are generated in the water, the leakage point can be quickly detected.

[0017] Furthermore, it also includes an air outlet joint, which is connected to one end of the shaft core away from the air inlet joint. Through the air outlet joint and the air outlet pipeline connected to the air outlet joint, the compressed air can be quickly led to the bottom of the plastic fuel tank.

[0018] Furthermore, the limiting module is fixedly connected to the shaft core.

[0019] Furthermore, the limiting module includes a first nut and a second nut;

[0020] Both the first nut and the second nut are threadedly connected to the shaft core, and the first nut and the second nut are locked and matched.

[0021] In this technical solution, by controlling the location where the first nut and the second nut are locked and matched on the shaft core (that is, controlling the distance between the contact point of the limiting module and the elastic sealing ring and the moving sleeve), the extrusion force brought by the cooperation of the limiting module and the moving sleeve to the elastic sealing ring can also be adjusted, thereby adjusting the adhesion force between the elastic sealing ring and the inner wall of the fuel filling port of the plastic fuel tank and improving the sealing performance.

[0022] Furthermore, the elastic sealing ring is a silicone rubber sealing ring.

[0023] Furthermore, an anti-slip sleeve is provided on the handle to improve the firmness of holding the handle.

[0024] Compared with the prior art, the principle and advantages of the present technical solution are as follows:

[0025] 1. The operator holds the handle and moves the elastic sealing ring in the plastic fuel tank leak detection and sealing device into the fuel filling port of the plastic fuel tank. Then, the operator rotates the handle away from the elastic sealing ring, thereby driving the handle connecting seat to rotate relative to the shaft core, and driving the moving sleeve to move towards the limiting module under the cooperation of the connecting piece. As a result, under the extrusion of the limiting module and the moving sleeve, the inner side of the elastic sealing ring closely fits with the shaft core, and the outer side closely fits with the inner wall of the fuel filling port of the plastic fuel tank, thus ensuring the sealing of the fuel filling port of the plastic fuel tank and being able to adapt to fuel filling ports of various plastic fuel tanks with different inner diameters (the difference in inner diameters of the fuel filling ports is not significant).

[0026] 2. Compressed gas is input into the plastic fuel tank through the air inlet joint and the air delivery channel, so that when bubbles are generated in the water, the leakage point can be quickly detected.

[0027] 3. By controlling the location where the first nut and the second nut are locked and matched on the shaft core (that is, controlling the distance between the contact point of the limiting module and the elastic sealing ring and the moving sleeve), the extrusion force brought by the cooperation of the limiting module and the moving sleeve to the elastic sealing ring can also be adjusted, thereby adjusting the adhesion force between the elastic sealing ring and the inner wall of the fuel filling port of the plastic fuel tank and improving the sealing performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the services required in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0029] Figure 1 FIG. 1 is a schematic structural diagram of a plastic fuel tank leak detection and sealing device according to Embodiment 1 of the present invention;

[0030] Figure 2 FIG. 2 is a schematic structural diagram of a plastic fuel tank leak detection and sealing device according to Embodiment 2 of the present invention;

[0031] Figure 3 FIG. 3 is a schematic structural diagram of a plastic fuel tank leak detection and sealing device according to Embodiment 3 of the present invention;

[0032] Figure 4 FIG. 4 is a schematic structural diagram of a plastic fuel tank leak detection and sealing device according to Embodiment 4 of the present invention;

[0033] Figure 5 FIG. 5 is a top view of a plastic fuel tank leak detection and sealing device according to Embodiment 4 of the present invention;

[0034] Figure 6 This is a cross-sectional view of the leak detection and sealing device for a plastic fuel tank in the fourth embodiment of the present utility model.

[0035] Reference numerals:

[0036] 1 - shaft core; 2 - elastic sealing ring; 3 - moving sleeve; 4 - handle connecting seat; 5 - handle; 6 - connecting piece; 7 - limiting module; 8 - air inlet joint; 9 - air outlet joint; 10 - first nut; 11 - second nut; 12 - anti-slip sleeve. Detailed implementation manners

[0037] The present utility model will be further described below in conjunction with three specific implementation manners:

[0038] Embodiment 1

[0039] As Figure 1 shown, a leak detection and sealing device for a plastic fuel tank described in this embodiment includes a shaft core 1, an elastic sealing ring 2 with a diameter matching the inner diameter of the fuel filling port of the plastic fuel tank, a moving sleeve 3, a handle connecting seat 4, a handle 5, and a connecting piece 6;

[0040] Among them, both the elastic sealing ring 2 and the moving sleeve 3 are sleeved on the shaft core 1, and one end of the moving sleeve 3 abuts against one end of the elastic sealing ring 2; a limiting module 7 (limiting member) that abuts against the other end of the elastic sealing ring 2 is fixedly provided on the shaft core 1; the handle connecting seat 4 is rotatably connected to the end of the shaft core 1 away from the limiting module 7, and the handle connecting seat 4 is connected to the moving sleeve 3 through the connecting piece 6; the handle 5 is connected to the handle connecting seat 4.

[0041] Specifically, in this embodiment, the elastic sealing ring 2 is a silicone sealing ring; an anti-slip sleeve 12 is provided on the handle 5 to improve the firmness of holding the handle 5.

[0042] The working principle of this embodiment is as follows:

[0043] The operator holds the handle 5 and moves the elastic sealing ring 2 in the plastic fuel tank leak detection and sealing device into the fuel filling port of the plastic fuel tank. Then, the operator rotates the handle 5 in the direction away from the elastic sealing ring 2, thereby driving the handle connecting seat 4 to rotate relative to the shaft core 1, and driving the moving sleeve 3 to move towards the limiting module 7 under the cooperation of the connecting piece 6, so that the elastic sealing ring 2 is tightly attached to the shaft core 1 on its inner side and tightly attached to the inner wall of the fuel filling port of the plastic fuel tank on its outer side under the extrusion of the limiting module 7 and the moving sleeve 3, thus ensuring the sealing of the fuel filling port of the plastic fuel tank and being able to adapt to fuel filling ports of a variety of different inner diameters (with a small difference in the inner diameter of the fuel filling port). When the leak detection and sealing test is completed, the operator rotates the handle 5 in the direction close to the elastic sealing ring 2, thereby driving the handle connecting seat 4 to rotate relative to the shaft core 1, and driving the moving sleeve 3 to move away from the limiting module 7 under the cooperation of the connecting piece 6, eliminating the extrusion force brought by the limiting module 7 and the moving sleeve 3 to the elastic sealing ring 2, thus eliminating the tightness of the outer side of the elastic sealing ring 2 against the inner wall of the fuel filling port of the plastic fuel tank. Finally, the operator holds the handle 5 and removes the elastic sealing ring 2 in the plastic fuel tank leak detection and sealing device from the fuel filling port of the plastic fuel tank.

[0044] Embodiment 2

[0045] As Figure 2 shown, compared with Embodiment 1, the limiting module 7 in this embodiment includes a first nut 10 and a second nut 11; both the first nut 10 and the second nut 11 are threadedly connected to the shaft core 1, and the first nut 10 and the second nut 11 are locked and cooperated.

[0046] In this embodiment, by controlling the location where the first nut 10 and the second nut 11 are locked and cooperated on the shaft core 1 (that is, controlling the distance between the contact point of the limiting module 7 and the elastic sealing ring 2 and the moving sleeve 3), the extrusion force brought by the cooperation of the limiting module 7 and the moving sleeve 3 to the elastic sealing ring 2 can also be adjusted, thereby adjusting the adhesion force between the elastic sealing ring 2 and the inner wall of the fuel filling port of the plastic fuel tank and improving the sealing performance.

[0047] That is, in this embodiment, the extrusion force brought by the cooperation of the limiting module 7 and the moving sleeve 3 to the elastic sealing ring 2 can be adjusted by changing the positions of the limiting module 7 and the moving sleeve 3.

[0048] Embodiment 3

[0049] As Figure 3 shown, compared with Embodiment 1, this embodiment further includes an air inlet joint 8 connected to an external air inlet pipeline and an air outlet joint 9 connected to an air outlet pipeline.

[0050] An air delivery channel is provided inside the shaft core 1; the air inlet joint 8 is connected to one end of the shaft core 1 close to the handle connecting seat 4; the air outlet joint 9 is connected to the end of the shaft core 1 far from the air inlet joint 8; the air inlet joint 8, the air delivery channel and the air outlet joint 9 are in communication.

[0051] In this embodiment, compressed gas is input into the plastic fuel tank through the air inlet joint 8, the air delivery channel and the air outlet joint 9, so that when bubbles are generated in water, the leakage point can be quickly detected.

[0052] Embodiment Four

[0053] As Figures 4 to 6 shown, compared with Embodiment Two, this embodiment further includes an air inlet joint 8 connected to an external air inlet pipeline and an air outlet joint 9 connected to an air outlet pipeline.

[0054] An air delivery channel is provided inside the shaft core 1; the air inlet joint 8 is connected to one end of the shaft core 1 close to the handle connecting seat 4; the air outlet joint 9 is connected to the end of the shaft core 1 far from the air inlet joint 8; the air inlet joint 8, the air delivery channel and the air outlet joint 9 are in communication.

[0055] In this embodiment, compressed gas is input into the plastic fuel tank through the air inlet joint 8, the air delivery channel and the air outlet joint 9, so that when bubbles are generated in water, the leakage point can be quickly detected.

[0056] The above-described embodiments are only the preferred embodiments of the present invention, and do not limit the scope of implementation of the present invention. Therefore, any changes made according to the shape and principle of the present invention should be covered within the protection scope of the present invention.

Claims

1. A plastic fuel tank leak detection and sealing device, characterized in that: It includes an axle core, an elastic sealing ring whose diameter matches the inner diameter of the filling port of the plastic fuel tank, a sports sleeve, a handle connecting seat, a handle, and a connecting piece; Wherein, the elastic sealing ring and the moving sleeve are both sleeved on the shaft core, and one end of the moving sleeve contacts one end of the elastic sealing ring; The shaft core is provided with a limit module which contacts the other end of the elastic sealing ring; The handle connection seat is rotatably connected to the end of the shaft core away from the limit module, and the handle connection seat is connected to the sports sleeve through a connecting piece; The handle is connected to the handle connecting seat.

2. A plastic fuel tank leak detection and sealing device according to claim 1, characterized in that: Also includes an air intake connector connected to an external air intake pipeline; A gas transmission channel is provided inside the shaft core; The air inlet joint is connected to one end of the shaft core close to the handle connection seat; The gas delivery channel is communicated with the gas inlet connector.

3. A plastic fuel tank leak detection and sealing device according to claim 2, characterized in that: Also included is an air outlet connector, which is connected to one end of the shaft core away from the air inlet connector.

4. A plastic fuel tank leak detection and sealing device according to claim 1, characterized in that: The limiting module is fixedly connected to the shaft core.

5. A plastic fuel tank leak detection and sealing device according to claim 1, characterized in that: The limiting module includes a first nut and a second nut; The first nut and the second nut are both threadedly connected to the shaft core, and the first nut and the second nut are locked together.

6. A plastic fuel tank leak detection and sealing device according to any one of claims 1 to 5, characterized in that: The elastic sealing ring is a silicone sealing ring.

7. A plastic fuel tank leak detection and sealing device according to any one of claims 1 to 5, characterized in that: An anti-slip cover is provided on the handle.

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