A gas collection cover for a refueling nozzle

Abstract

This utility model discloses a gas collection cover for a fuel nozzle, relating to the field of gas collection cover technology. It includes: a cover body comprising a connecting pipe and a corrugated pipe connected together; the connecting pipe is detachably connected to the fuel nozzle's outlet pipe via a connector; the corrugated pipe is fixedly connected to the connecting pipe; and a sealing pipe fixedly connected to the corrugated pipe, with an annular groove at the end of the sealing pipe furthest from the corrugated pipe, and a flexible sealing ring for sealing fixedly connected within the annular groove. In use, after the fuel nozzle's outlet pipe is inserted into the fuel tank, the sealing pipe is pressed against the fuel tank opening. The suction groove, made of flexible material with a smooth curved surface, acts as a suction cup when the sealing pipe is pressed, adhering to the vehicle and simultaneously sealing the interior of the cover body. The flexible sealing ring on the sealing pipe provides a secondary sealing effect.

Description

Technical Field

[0001] This utility model relates to the field of gas collection hood technology, specifically a gas collection hood for a refueling nozzle. Background Technology

[0002] With increasingly stringent environmental regulations and growing public awareness of volatile organic compound (VOC) emission control, gas station vapor recovery systems have become indispensable environmental protection facilities. During refueling operations, gasoline and other light oil products evaporate in large quantities, producing oil vapors containing complex hydrocarbons. This not only wastes energy and causes economic losses but also poses serious threats to the atmospheric environment and human health.

[0003] Currently, gas stations generally use the Stage II vapor recovery system, which uses a vacuum pump to generate negative pressure while refueling a vehicle's fuel tank. This system draws the vapors evaporating from the fuel tank opening back into an underground storage tank through a dedicated vapor recovery channel, thereby achieving vapor recovery and reducing emissions.

[0004] The vent hood is a key component installed at the end of the fuel nozzle's outlet pipe. Its core function is to form an effective seal with the vehicle's fuel tank opening during refueling, preventing fuel vapors from escaping and ensuring that the evaporated fuel vapors are efficiently drawn into the vapor recovery system. However, this type of vent hood is not suitable for all fuel tank openings. During refueling, a certain gap exists between the vent hood and the fuel tank opening of some vehicles, rendering the vent hood ineffective and causing fuel vapors to escape directly into the atmosphere. Utility Model Content

[0005] The purpose of this invention is to provide a gas collection cover for a refueling nozzle to address the shortcomings of the prior art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a gas collection cover for a fuel nozzle, comprising: a cover body, which includes a connecting pipe and a corrugated pipe connected together, wherein the connecting pipe is detachably connected to the oil outlet pipe of the fuel nozzle via a connector, and the corrugated pipe is fixedly connected to the connecting pipe; and a fitting pipe, which is fixedly connected to the corrugated pipe, wherein an annular groove is provided at the end of the fitting pipe away from the corrugated pipe, and a flexible sealing ring for sealing is fixedly connected in the annular groove.

[0007] Preferably, the flexible sealing ring has an annular adsorption groove on the outward side, and the inner surface of the adsorption groove is an inwardly concave and smooth curved surface.

[0008] Preferably, one end of the corrugated pipe is a narrow end and the other end is a wide end, the connecting pipe is connected to the narrow end of the corrugated pipe, and the fitting pipe is connected to the wide end of the corrugated pipe.

[0009] Preferably, a connector is threadedly connected to the oil and gas recovery port on the corrugated pipe, and the connector is connected to the oil and gas recovery device of the gas station through the oil and gas recovery pipe.

[0010] Preferably, the connector includes a rotating sleeve that is threadedly rotatably connected to the connecting pipe, a sleeve fixedly connected to the rotating sleeve, the sleeve having a first frustum conical surface inside, and the connecting pipe having at least two arc-shaped elastic locking blocks, the outer surface of the arc-shaped elastic locking blocks having a second frustum conical surface that abuts against the first frustum conical surface.

[0011] Preferably, an elastic sealing ring is fixedly connected inside the connecting pipe.

[0012] Preferably, the inner surface of each arc-shaped elastic locking block is provided with anti-slip texture.

[0013] In the above technical solution, the present invention provides a gas collection cover for a fuel nozzle. Specifically, during use, after the fuel nozzle's outlet pipe is inserted into the fuel tank, the adhesive tube is pressed and attached to the vicinity of the fuel tank opening. At this time, the adsorption groove, being made of flexible material and having a smooth curved surface, acts as a suction cup when the adhesive tube is pressed, adhering to the vehicle and simultaneously sealing the inside of the cover. The flexible sealing ring installed on the adhesive tube provides a secondary sealing effect. Afterward, the operator recovers the fuel vapor through the connector at the connected fuel vapor recovery port and the fuel vapor recovery pipe connected to the external fuel vapor recovery device.

[0014] Specifically, after the staff inserts the cover into the oil outlet pipe, by rotating the rotating sleeve, the first frustum conical surface presses against the second frustum conical surface, causing multiple arc-shaped elastic locking blocks to undergo elastic deformation, thereby causing the multiple arc-shaped elastic locking blocks to abut against the oil outlet pipe, thus completing the locking between the cover and the oil outlet pipe. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0016] Figure 1 A schematic diagram of the overall structure provided for an embodiment of this utility model;

[0017] Figure 2 A schematic diagram of the cover structure provided for an embodiment of this utility model;

[0018] Figure 3 This is a schematic diagram of the internal structure of the cover provided in an embodiment of the present utility model;

[0019] Figure 4 Provided for the embodiments of this utility model Figure 3 A magnified view of A in the middle.

[0020] Explanation of reference numerals in the attached figures:

[0021] 1. Connecting pipe; 2. Corrugated pipe; 3. Oil outlet pipe; 4. Fitting pipe; 5. Annular groove; 6. Flexible sealing ring; 7. Adsorption tank; 8. Oil and gas recovery port; 9. Connector; 10. Rotating sleeve; 11. Sleeve; 12. First frustum conical surface; 13. Arc-shaped elastic locking block; 14. Second frustum conical surface; 15. Elastic sealing ring sleeve. Detailed Implementation

[0022] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0023] Please see Figure 1-4 The present invention provides a gas collection cover for a fuel nozzle, comprising a cover body and a fitting tube 4. The cover body includes a connecting tube 1 and a corrugated tube 2 connected together. The connecting tube 1 is detachably connected to the oil outlet tube 3 of the fuel nozzle via a connector. The corrugated tube 2 is fixedly connected to the connecting tube 1. The fitting tube 4 is fixedly connected to the corrugated tube 2, and an annular groove 5 is provided at the end of the fitting tube 4 away from the corrugated tube 2. A flexible sealing ring 6 for sealing is fixedly connected in the annular groove 5.

[0024] Among them, the flexible sealing ring 6 has an annular adsorption groove 7 on the outward side, and the inner surface of the adsorption groove 7 is an inwardly concave and smooth curved surface.

[0025] The corrugated pipe 2 has a narrow opening at one end and a wide opening at the other. The connecting pipe 1 is connected to the narrow opening of the corrugated pipe 2, and the fitting pipe 4 is connected to the wide opening of the corrugated pipe 2. It should be noted that the corrugated pipe 2 uses existing technology and has a telescopic function, which facilitates adjustment of the distance between the cover and the fuel tank filler neck.

[0026] Among them, the oil and gas recovery port 8 opened on the corrugated pipe 2 is threaded with a connector 9, and the connector 9 is connected to the oil and gas recovery device of the gas station through the oil and gas recovery pipe.

[0027] Specifically, during use, after inserting the fuel nozzle's outlet pipe 3 into the fuel tank, press the bonding tube 4 to adhere it near the fuel tank opening. At this time, the adsorption groove 7, being made of flexible material and having a smooth curved surface, acts as a suction cup when the bonding tube 4 is pressed, adhering to the vehicle and simultaneously sealing the inside of the cover. The flexible sealing ring 6 installed on the bonding tube 4 provides a secondary sealing effect. Afterward, the operator achieves fuel and vapor recovery through the connector 9 at the connected vapor recovery port 8 and the vapor recovery pipe connected to the external vapor recovery device.

[0028] The connector includes a rotating sleeve 10 threadedly connected to a connecting pipe 1, a sleeve 11 fixedly connected to the rotating sleeve 10, a first frustum-shaped conical surface 12 inside the sleeve 11, and at least two arc-shaped elastic locking blocks 13 on the connecting pipe 1. The outer surface of each arc-shaped elastic locking block 13 has a second frustum-shaped conical surface 14 that abuts against the first frustum-shaped conical surface 12. The arc-shaped elastic locking blocks 13 are made of an elastic material available in the prior art.

[0029] An elastic sealing ring 15 is fixedly connected inside the connecting pipe 1. This elastic sealing ring is made of oil-resistant fluororubber, providing both elasticity and a sealing function. The diameter of the elastic sealing ring 15 is generally smaller than the diameter of the oil outlet pipe 3 of most fuel nozzles on the market, thus achieving a sealing effect. Furthermore, the elastic sealing ring 15 has a chamfered end facing the inner cavity of the bellows 2, forming a flared conical surface for easy insertion into the oil outlet pipe 3 of the fuel nozzle. In the unlocked state, the diameter of the circle formed by the inner diameters of multiple arc-shaped elastic locking blocks 13 is larger than the diameter of the elastic sealing ring 15.

[0030] Each arc-shaped elastic locking block 13 has an anti-slip texture on its inner surface. It should be noted that the anti-slip texture increases the friction between the arc-shaped elastic locking block 13 and the oil outlet pipe 3, thereby improving the locking effect.

[0031] Specifically, after the staff inserts the cover into the oil outlet pipe 3, by rotating the rotating sleeve 10, the first frustum cone surface 12 presses against the second frustum cone surface 14, causing multiple arc-shaped elastic locking blocks 13 to undergo elastic deformation, thereby causing multiple arc-shaped elastic locking blocks 13 to abut against the oil outlet pipe 3, thus completing the locking between the cover and the oil outlet pipe 3.

[0032] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A vapor recovery hood for a fuel dispenser, comprising: include: The cover includes a connecting pipe and a corrugated pipe connected together. The connecting pipe is detachably connected to the oil outlet pipe of the fuel nozzle via a connector, and the corrugated pipe is fixedly connected to the connecting pipe. The fitting tube is fixedly connected to the corrugated pipe, and an annular groove is provided at the end of the fitting tube away from the corrugated pipe. A flexible sealing ring for sealing is fixedly connected in the annular groove.

2. A vapor recovery boot for a fuel dispenser as set forth in claim 1, wherein, The flexible sealing ring has an annular adsorption groove on its outward-facing side, and the inner surface of the adsorption groove is a smooth, inwardly concave curved surface.

3. A vapor recovery boot for a fuel dispenser as set forth in claim 1, wherein, One end of the corrugated pipe is a narrow end and the other end is a wide end. The connecting pipe is connected to the narrow end of the corrugated pipe, and the fitting pipe is connected to the wide end of the corrugated pipe.

4. The vapor recovery boot of claim 1 wherein, The corrugated pipe has a threaded connector at the oil and gas recovery port, and the connector is connected to the oil and gas recovery device of the gas station through the oil and gas recovery pipe.

5. The vapor recovery boot of claim 1 wherein, The connector includes a rotating sleeve that is threadedly rotatably connected to the connecting pipe. A sleeve is fixedly connected to the rotating sleeve. The sleeve has a first frustum conical surface inside. The connecting pipe is provided with at least two arc-shaped elastic locking blocks. The outer surface of the arc-shaped elastic locking blocks has a second frustum conical surface that abuts and cooperates with the first frustum conical surface.

6. A vapor recovery boot for a fuel dispenser as set forth in claim 5 wherein, An elastic sealing ring is fixedly connected inside the connecting pipe.

7. A vapor recovery boot for a fuel dispenser as set forth in claim 5 wherein, The inner surface of each curved elastic locking block is provided with anti-slip texture.

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