Mechanical seal valve filler

Abstract

The utility model discloses a mechanical seal valve filling port. The mechanical seal valve filling port includes the pipe body of bottom fixed connection fuel tank, and the pipe body is connected with the flow guide pipe of fuel introduction fuel tank inside through the seal valve, and the seal valve includes inner and outer bushings, and the inner bushing is sleeved with the outer bushing, and the inner bushing is equipped with the passageway of oil gun nozzle insertion, and the passageway end is equipped with the elastic pad, and the elastic pad is on the retaining ring of outer bushing bottom, and the elastic pad includes inner and outer ring rubber pads, and the inner ring rubber pad is sleeved with the outer ring rubber pad, and the inner diameter of inner ring rubber pad matches the outer circumferential surface of oil gun nozzle, and the inner portion of outer ring rubber pad is equipped with the framework of improving its strength. The utility model discloses a mechanical seal valve filling port solves the problem that when the oil gun nozzle inserts the filling port, the evaporation pollutant in the fuel tank is discharged from the filling port and pollutes the atmosphere.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts, and in particular to the filling port of a mechanical seal valve. Background Technology

[0002] When the filler cap is opened, evaporated pollutants from the fuel tank inevitably enter the atmosphere through the filler opening, causing pollution. Current technology incorporates a spring-loaded door at the end of the filler opening to prevent these pollutants from entering the fuel tank. During refueling, the fuel nozzle pushes open the door to create a gap for refueling, thus reducing emissions. However, the spring-loaded structure is prone to failure, which could render the filler opening ineffective in reducing emissions. Utility Model Content

[0003] The purpose of this invention is to address the shortcomings of existing technologies by providing a mechanical seal valve filling port that offers good sealing performance and effectively reduces the emission of evaporative pollutants.

[0004] To achieve the above objectives, the technical solution adopted by the filling port of the mechanical seal valve of this utility model is as follows:

[0005] A mechanical seal valve filling port includes a pipe body fixed to the bottom of a fuel tank. The pipe body is connected via a sealing valve to a guide pipe that introduces fuel into the fuel tank. The sealing valve includes inner and outer bushings, with the inner bushing fitting over the outer bushing. The inner bushing has a channel for inserting a fuel nozzle, and an elastic pad is located at the end of the channel. The elastic pad rests on a retaining ring at the bottom of the outer bushing. The elastic pad includes inner and outer rubber rings, with the inner rubber ring fitting over the outer rubber ring. The inner diameter of the inner rubber ring matches the outer circumference of the fuel nozzle, and the outer rubber ring has a reinforcing skeleton inside to enhance its strength. During fuel filling, the fuel nozzle is inserted into the sealing valve, and the inner rubber ring tightly adheres to the outer circumference of the fuel nozzle to form a sealing surface, effectively preventing evaporative pollutants from the fuel tank from being released into the atmosphere. The outer rubber ring provides support for the inner rubber ring, preventing it from being squeezed out of the sealing valve by the fuel nozzle.

[0006] Preferably, the inner wall of the inner liner channel is provided with at least three bevels for positioning the grease gun nozzle. The bevels effectively control the tilt angle of the grease gun nozzle, ensuring a tight seal between the grease gun nozzle and the inner ring gasket.

[0007] Preferably, the outer circumferential surface of the outer bushing is provided with a first protrusion. The first protrusion positions the sealing valve inside the pipe body.

[0008] Preferably, the guide tube is interference-fitted with the tube body, the front end of the guide tube abuts against the sealing valve, and a second protrusion is provided on the outer circumferential surface of the guide tube. The interference fit between the guide tube and the tube body fixes the sealing valve inside the tube body, and the three form a whole, which facilitates subsequent welding to the fuel tank. The second protrusion abuts against the outer wall of the fuel tank to prevent the sealing valve from falling out of the tube body along with the guide tube.

[0009] Preferably, the pipe body has a limiting step in the middle and a mounting part at the bottom. The outer wall of the mounting part has a raised mark for easy welding and positioning. The limiting step cooperates with the first boss to position the sealing valve, and the sealing valve is fixed inside the pipe body by the flow guide pipe.

[0010] Compared with the prior art, this utility model has the following advantages:

[0011] 1. The inner ring rubber gasket fits tightly against the outer circumference of the fuel nozzle to form a sealing surface, effectively preventing the emission of evaporative pollutants from inside the fuel tank into the atmosphere. The outer ring rubber gasket provides support for the inner ring rubber gasket, preventing the inner ring rubber gasket from being squeezed out of the sealing valve by the fuel nozzle.

[0012] 2. The inclined surface of the inner wall of the inner bushing channel effectively controls the tilt angle of the oil gun nozzle, ensuring the sealing performance between the oil gun nozzle and the inner ring gasket.

[0013] 3. The interference fit between the pipe body and the guide pipe fixes the sealing valve inside the pipe body. The structure is simple, the assembly is convenient, and it is not easy to fail after being fixed to the fuel tank. Attached Figure Description

[0014] Figure 1 This is a cross-sectional view of the fuel tank filler neck;

[0015] Figure 2 yes Figure 1 A magnified view of a portion of the image;

[0016] Figure 3 This is an exploded view of the filling port structure;

[0017] Figure 4 This is a schematic diagram of the elastic pad structure;

[0018] Figure 5 This is a schematic diagram of the existing technology structure.

[0019] Among them, 1 is the pipe body, 11 is the limiting step, 12 is the mounting part, 121 is the raised mark, 2 is the sealing valve, 21 is the inner bushing, 211 is the channel, 212 is the inclined surface, 22 is the outer bushing, 221 is the first boss, 222 is the retaining ring, 23 is the elastic pad, 231 is the inner ring rubber pad, 232 is the outer ring rubber pad, 2321 is the skeleton, 3 is the guide pipe, and 31 is the second boss. Detailed Implementation

[0020] The present invention will be further illustrated below with reference to the accompanying drawings and specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention. After reading the present invention, any modifications of the present invention in various equivalent forms by those skilled in the art will fall within the scope defined by the appended claims.

[0021] like Figure 1-4As shown, a mechanical seal valve filling port includes a pipe body 1, a limiting step 11 arranged in the middle of the pipe body, and a sealing valve 2 positioned by the limiting step. The sealing valve includes inner and outer bushings. The inner bushing 21 is fitted onto the outer bushing 22 and locked with screws. A first boss 221 that mates with the limiting step is arranged on the outer circumference of the outer bushing. The inner bushing has a channel 211 for inserting an oil gun nozzle. Four inclined surfaces 212 for positioning the oil gun nozzle are equally arranged on the inner wall of the channel. The inclined surfaces effectively control the tilt angle of the oil gun nozzle to ensure the sealing performance between the oil gun nozzle and the inner ring rubber gasket. An elastic gasket 23 is arranged at the end of the channel. The elastic gasket is located on the retaining ring 222 at the bottom of the outer bushing. The elastic gasket includes inner and outer ring rubber gaskets. The inner ring rubber gasket 231 is fitted onto the outer ring rubber gasket 232. The inner diameter of the inner ring rubber gasket matches the oil... On the outer circumference of the nozzle, an outer ring rubber gasket with an internal skeleton 2321 is arranged to enhance its strength. The outer ring rubber gasket provides support for the inner ring rubber gasket, preventing the inner ring rubber gasket from being squeezed out of the sealing valve by the nozzle. A guide tube 3 is inserted into the bottom of the tube body to introduce fuel into the fuel tank. The front end of the guide tube abuts against the bottom of the outer bushing. The guide tube and the tube body are interference-fitted to fix the sealing valve inside the tube body. The three form a whole. A second protrusion 31 is arranged on the outer circumference of the guide tube. A mounting part 12 for welding to the fuel tank is arranged at the bottom of the tube body. The mounting part is a ring. A raised mark 121 for easy welding positioning is arranged on the outer circumference of the ring. The second protrusion is stored in the inner cavity of the ring. After the ring is welded to the fuel tank, the second protrusion abuts against the outer wall of the fuel tank to prevent the sealing valve from falling out of the tube body along with the guide tube.

[0022] The specific working process and principle of a mechanical seal valve filling port: During fuel filling, the fuel nozzle is inserted into the inner bushing and abuts against the inner ring gasket. The inclined surface on the inner bushing channel positions the tilt angle of the fuel nozzle, ensuring a tight seal between the fuel nozzle and the inner ring gasket, effectively preventing evaporative pollutants from the fuel tank from being emitted into the atmosphere. The outer ring gasket provides support for the inner ring gasket, preventing the inner ring gasket from being squeezed out of the sealing valve by the fuel nozzle. This utility model has a simple structure, is easy to assemble, and is not prone to failure after being fixed to the fuel tank, effectively reducing the emission of evaporative pollutants.

Claims

1. A filling port for a mechanical seal valve, characterized in that: The device includes a pipe body fixed to the bottom of the fuel tank. The pipe body is connected to a guide pipe that introduces fuel into the fuel tank via a sealing valve. The sealing valve includes inner and outer bushings. The inner bushing fits onto the outer bushing. The inner bushing has a channel for inserting the fuel nozzle. An elastic pad is provided at the end of the channel. The elastic pad is located on a retaining ring at the bottom of the outer bushing. The elastic pad includes inner and outer rubber pads. The inner rubber pad fits onto the outer rubber pad. The inner diameter of the inner rubber pad matches the outer circumference of the fuel nozzle. The outer rubber pad has a skeleton inside to improve its strength.

2. The filling port of the mechanical seal valve according to claim 1, characterized in that: The inner wall of the inner liner channel is provided with at least three bevels for positioning the oil gun nozzle.

3. The filling port of the mechanical seal valve according to claim 1, characterized in that: The outer circumferential surface of the outer bushing is provided with a first boss.

4. The filling port of the mechanical seal valve according to claim 1, characterized in that: The guide tube is interference-fitted with the tube body, the front end of the guide tube abuts against the sealing valve, and a second protrusion is provided on the outer circumferential surface of the guide tube.

5. The filling port of the mechanical seal valve according to claim 1 or 4, characterized in that: The tube body is provided with a limiting step in the middle and an installation part at the bottom. The outer wall of the installation part is provided with raised markings to facilitate welding and positioning.

Images