Low-emission fuel oil filling pipeline of all-metal structure

Abstract

The utility model discloses a low-emission fuel oil filling pipeline with an all-metal structure in the field of automobile oil filling systems, which comprises a metal circulating pipe, a metal main pipe, a metal corrugated pipe and a metal female joint, the metal main pipe comprises a flaring section and a bending section which are integrally connected, a metal cup is arranged in the flaring section, and the metal corrugated pipe is connected with the metal female joint. One end of the metal circulating pipe is communicated with the flaring section, and the metal female connector is connected with the quick-inserting male connector. According to the utility model, the quick-insertion structural design that the metal corrugated pipe is matched with the metal female joint is adopted, so that the zero emission requirement of the refueling pipeline is realized, and the requirement of deep development of the industry is better met.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of automobile oil filling system, especially relates to a low emission fuel filling pipeline of all metal structure. BACKGROUND

[0002] With the gradual strengthening of national energy conservation and environmental protection consciousness, and the improvement of user's quality requirement to automobile, the service life of whole vehicle parts is higher and higher, and the automobile oil filling system as a component of fuel system needs to reduce the fuel evaporation emission of oil filling system after the promulgation of national six regulations, so as to reach the standard.

[0003] In the prior art, a kind of automobile oil filling pipe assembly is disclosed, its publication number: CN207311096U;Application date: October 26, 2017;Publication date: May 4, 2018, including oil filling steel pipe and oil filling port, oil filling steel pipe is connected with the oil filling port by a conical pipe, connecting thread is provided in oil filling port, oil filling rubber tube is sleeved with oil filling steel pipe at the end far from oil filling port, the surface of oil filling steel pipe is formed coating by powder spraying, oil filling rubber tube includes inner tube rubber layer, fiber wire reinforcing layer and outer tube rubber layer;One end of oil filling rubber tube is fixed with the oil filling steel pipe by connecting clamp, the other end of oil filling rubber tube is provided with fixed clamp outside, fixed support is provided outside oil filling steel pipe.Using oil filling steel pipe and oil filling rubber tube constitute, through the combination of rigid material and flexible material, the overall strength of oil filling pipe is guaranteed, and the installation of oil filling pipe in small space is facilitated.The deficiency is that: although the connection with oil tank joint is realized by multilayer rubber hose and turbine worm clamp, but emission is limited not only by the length of rubber hose, but also rubber pipe poor aging resistance leads to leakage, permeation emission does not meet the requirements of regulations. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a kind of low emission fuel filling pipeline of all metal structure, adopts the quick plug structure design of metal bellows pipe cooperation metal female joint, completely solves the problem of increasing emission by multilayer rubber tube.

[0005] The utility model aims at being realized as follows: a kind of low emission fuel filling pipeline of all metal structure, including metal circulating pipe, metal main pipe, metal bellows pipe and metal female joint, the metal main pipe includes the flared section and the bending section of integral connection, metal cup is provided in the flared section, the metal circulating pipe one end is communicated with flared section, the metal female joint is connected with quick plug male joint.

[0006] Compared with the prior art, the utility model discloses the beneficial effect lies in: main part adopts full metal structure, realized the " 0 " discharge requirement of oil filling pipeline itself, better meet the demand of industry depth development, adopt the structure design of metal bellows and through metal female joint and quick -plug male joint quick -wired, thoroughly solved the problem of increasing discharge of application multilayered rubber tube, realized the purpose of quick -wired assembly cost -saving, metal mouth cup is convenient for personnel better control the attitude of oil filling gun, to improve the stability when refueling, main pipe adopts integrated structure and sets up in the flared section with small -sized metal mouth cup, avoid the phenomenon of leakage of mouth cup connecting place, further reduce the discharge, in the process of refueling, oil liquid enters the oil tank after constantly buffering through metal bellows, avoids oil liquid direct impact oil tank inner wall, thereby reduced the evaporation discharge of oil gas.

[0007] As a further improvement of the utility model, the flared section includes a flange portion, a knurled portion, a cylindrical portion, and a constricted portion, the metal mouth cup is welded in the cylindrical portion and has a gas supplement opening, and the cylindrical portion is welded with one end of the metal circulation pipe at a position corresponding to the gas supplement opening.

[0008] As a further improvement of the utility model, the metal mouth cup includes an annular welded portion and an eccentric tapered portion, and the eccentric tapered portion is on the same axis as the inlet end of the bent section.

[0009] As a further improvement of the utility model, the eccentric tapered portion is provided with an arc-shaped baffle at a position corresponding to the gas supplement opening.

[0010] As a further improvement of the utility model, the quick-plug male joint includes a first plug-in portion, a main body middle portion, and a second plug-in portion which are sequentially and integrally connected, the first plug-in portion, the main body middle portion, and the second plug-in portion are all hollow structures and the internal cavities thereof are in communication with each other, the first plug-in portion is used for communicating with the metal female joint, the outer periphery of the first plug-in portion is provided with a limiting baffle and a plurality of sealing grooves, the sealing grooves are provided with a sealing ring, the outer periphery of the main body middle portion is provided with a circular truncated cone, the limiting baffle is located between the sealing grooves and the circular truncated cone, and the second plug-in portion is used for communicating with the oil tank.

[0011] As a further improvement of the utility model, the metal female joint includes a pipeline connecting portion, a joint connecting portion, and a sleeve connecting portion which are sequentially and integrally connected, the joint connecting portion is sleeved on the outer periphery of the first plug-in portion, the sleeve connecting portion is provided with two clamping grooves which are symmetrically distributed, the clamping grooves are clamped with elastic clamps, the elastic clamps abut against the limiting baffle, and the side surface of the sleeve connecting portion abuts against the circular truncated cone.

[0012] As a further improvement of the utility model, the first plug-in portion, the main body middle portion, the second plug-in portion, and the circular truncated cone are all made of plastic injection molding, and the sealing ring is made of one of silicon rubber, fluorine rubber, and fluorosilicone rubber.

[0013] As a further improvement of the utility model, the second plug-in part extends into the check valve, the check valve comprises a valve cap, a reversible cover plate is arranged at the bottom of the valve cap through a torsion spring and a pin, and the cover plate is used for opening or closing the internal passage of the valve cap.

[0014] As a further improvement of the utility model, the valve cap is provided with positioning grooves and square grooves around the periphery, the second plug-in part is provided with positioning blocks corresponding to the positioning grooves and wedge-shaped blocks corresponding to the square grooves, and a limiting step is arranged corresponding to the top of the valve cap, the limiting step is provided with a sealing groove two around the periphery, and a sealing ring two is arranged in the sealing groove two.

[0015] As a further improvement of the utility model, the trend of the metal circulating pipe is consistent with the bending section, a plurality of metal fixing frames are arranged on the outer side of the bending section and are distributed along the length direction of the bending section, mounting holes are arranged on the metal fixing frames, and the circulating pipe is connected with the metal fixing frames around the periphery. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a three-dimensional structure schematic view of the utility model.

[0017] Figure 2 It is a sectional view of the flared section of the utility model.

[0018] Figure 3 It is a three-dimensional structure schematic view of the metal cup of the utility model.

[0019] Figure 4 It is a three-dimensional structure schematic view of the male quick plug connector of the utility model.

[0020] Figure 5 It is a three-dimensional structure schematic view when the female metal connector is connected with the male quick plug connector.

[0021] Figure 6 It is a three-dimensional structure schematic view when the male quick plug connector is connected with the check valve.

[0022] Figure 7 It is a sectional view when the male quick plug connector is connected with the check valve.

[0023] Among them, 1 is a metal circulation pipe, 2 is a metal main pipe, 201 is a flared section, 201a is a flanged section, 201b is a threaded section, 201c is a round pipe section, 201d is a shrink section, 202 is a bending section, 3 is a metal corrugated pipe, 4 is a metal female connector, 401 is a pipe connection section, 402 is a connector connection section, 403 is a socket section, 403a is a groove, 404 is a clamp, 5 is a quick-connect male connector, 501 is a first insertion section, 501a is a limiting baffle, 501b is a sealing groove, 502 is the middle part of the main body, 502 is a... a. Frustum, 503. Second insertion part, 503a. Positioning block, 503b. Wedge block, 503c. Limiting step, 503d. Sealing groove two, 504. Sealing ring one, 505. Sealing ring two, 6. Metal fixing bracket, 601. Mounting hole, 7. Metal cup, 701. Air inlet, 702. Eccentric tapering part, 703. Arc baffle, 704. Annular welded part, 8. Check valve, 801. Valve cap, 801a. Positioning groove, 801b. Square groove, 802. Torsion spring, 803. Pin, 804. Cover plate. Detailed Implementation

[0024] like Figures 1-3 As shown, this is a low-emission fuel refueling pipeline with an all-metal structure, including a metal circulation pipe 1, a metal main pipe 2, a metal bellows pipe 3, and a metal female connector 4. The metal main pipe 2 includes an integrally connected flared section 201 and a bent section 202. One end of the metal circulation pipe 1 is connected to the flared section 201, and the other end is connected to the charcoal canister. The metal female connector 4 is connected to a quick-connect male connector 5. The direction of the metal circulation pipe 1 is consistent with that of the bent section 202. Two metal fixing brackets 6 are provided on the outer side of the bent section 202, which are spaced apart along its length. The metal fixing brackets 6 have mounting holes 601, and the outer periphery of the circulation pipe is connected to the metal fixing brackets 6. The flared section 201 includes a flanged part 201a, a threaded part 201b, a round tube part 201c, and a contraction section. The inner wall of the circular tube section 201d and the circular tube section 201c is welded with a metal cup 7 by resistance welding. The metal cup 7 is provided with an air inlet 701. The outer periphery of the circular tube section 201c is welded to the port of the metal circulation pipe 1 at the air inlet 701. The metal cup 7 includes an annular welded part 704 and an eccentric tapering part 702. The eccentric tapering part 702 and the inlet end of the bending section 202 are on the same axis to ensure smooth refueling. In order to prevent the refueling nozzle from jumping due to insufficient space at the bottom of the tapering part 201d, the tapering part 201d is designed with an asymmetrical structure. An arc-shaped baffle 703 is provided at the air inlet 701 corresponding to the eccentric tapering part 702 to prevent excess fuel or fuel vapor from leaking back from the air inlet 701.

[0025] Specifically, the quick plug male connector 5 comprises a first plug-in part 501, a main body middle part 502 and a second plug-in part 503 which are sequentially and integrally connected, the first plug-in part 501, the main body middle part 502 and the second plug-in part 503 are all hollow structures and the internal cavities are communicated with each other, the first plug-in part 501 is used for communicating with the metal female connector 4, a limiting baffle 501a and two spaced sealing grooves 501b are arranged on the outer periphery of the first plug-in part 501, a sealing ring 504 is arranged in the sealing groove 501b, a circular table 502a is arranged on the outer periphery of the main body middle part 502, the limiting baffle 501a is located between the sealing groove 501b and the circular table 502a, the second plug-in part 503 is used for communicating with the oil tank, as shown in Figure 4 ; the first plug-in part 501, the main body middle part 502, the second plug-in part 503 and the circular table 502a are all made of plastic injection molding, which can realize continuous and rapid production of the quick plug connector, reduce manual intervention and thus improve the production efficiency.

[0026] As shown in Figure 5 , the metal female connector 4 comprises a pipeline connecting part 401, a connector connecting part 402 and a sleeve connecting part 403 which are sequentially and integrally connected, the connector connecting part 402 is sleeved on the outer periphery of the first plug-in part 501, the sleeve connecting part 403 is provided with two symmetrically distributed clamping grooves 403a on the outer periphery, a elastic clamping hoop 404 is clamped and connected in the clamping groove 403a, the clamping hoop 404 abuts against the limiting baffle 501a, the side surface of the sleeve connecting part 403 abuts against the circular table 502a, by limiting the clamping hoop 404 in the area formed by the limiting baffle 501a and the clamping groove 403a, the purpose of preventing the clamping spring from falling off naturally is achieved.

[0027] In other embodiments of the utility model, the second plug-in part 503 is connected with the check valve 8, which can keep open and closed in the oil filling process and after oil filling, effectively avoiding the evaporation emission problem caused by the harsh environment of the oil tank, specifically, the check valve 8 comprises a valve cap 801, the bottom of the valve cap 801 is provided with a reversible cover plate 804 through a torsional spring 802 and a pin 803, the cover plate 804 is used for opening or closing the internal passage of the valve cap 801, the outer periphery of the valve cap 801 is provided with a positioning groove 801a and four square grooves 801b, the second plug-in part 503 is provided with a positioning block 503a corresponding to the positioning groove 801a, is provided with a wedge-shaped block 503b corresponding to the square groove 801b, is provided with a limiting step 503c corresponding to the top of the valve cap 801, the outer periphery of the limiting step 503c is provided with a sealing groove two 503d, the sealing groove two 503d is provided with a sealing ring two 505, the sealing ring one 504 and the sealing ring two 505 are all made of one kind of material selected from the group consisting of silicone rubber, fluorine rubber and fluorosilicone rubber.

[0028] The utility model discloses the advantages lie in: through adding sealing structure at the end of quick -plug male joint 5, the problem of difficult processing sealing groove, unstable size of metal female joint 4 has been solved, the leak risk of the whole emission of oil filling pipeline has been reduced, the stability of connection structure has been guaranteed, the first plug -in part 501 periphery designs the stop baffle 501a, can cooperate on the clamp of metal female joint 4, avoids quick -plug joint axial migration, guarantees the stability of connection structure, the circular platform 502a of the port abutment of metal female joint 4, can improve the pressure -bearing capacity of joint connection place, metal female joint 4 and quick -plug male joint 5 main part all adopt integrated structure, make the connection between the structure each component more closely, reduce the joint and complex node to improve the overall strength, stability and sealing of oil management, can meet the demand of lower emission regulation requirement fuel emission regulation (include new energy automobile) (include new energy automobile), the structure of this pipeline is simple, easy to realize automatic assembly production, improve the labor efficiency.

[0029] The utility model discloses not limit to the above -mentioned embodiment, on the basis that the technical scheme is disclosed in the utility model, the technical content of the disclosure, and the technical personnel in the art can make some replacement and deformation to some technical features in it without creative labor, and these replacement and deformation are all within the protection scope of the utility model.

Claims

1. A low emission fuel filler pipe of all metal construction, characterized in that, The utility model provides a metal circulating pipe, metal main pipe, metal bellows and metal female joint, the metal main pipe includes the flared section and the bending section of integral connection arrangement, the flared section is arranged with metal cup, one end of the metal circulating pipe communicates with the flared section, and the metal female joint is connected with the male joint of quick insertion.

2. A low emission fuel fill pipe of all metal construction according to claim 1, wherein, The flared section includes a flange, a threaded section, a cylindrical section, and a constricted section, the metal cup is welded in the cylindrical section and has a gas supplement opening, and the cylindrical section is welded with the one end of the metal circulating pipe at the position corresponding to the gas supplement opening.

3. A low emission fuel fill pipe of all metal construction according to claim 2, wherein, The metal cup includes an annular welding section and an eccentric tapered section, and the eccentric tapered section is on the same axis as the inlet end of the bending section.

4. A low emission fuel fill pipe of all metal construction according to claim 3, wherein, The eccentric tapered section is provided with an arc baffle at the position corresponding to the gas supplement opening.

5. A low emission fuel fill pipe of all metal construction according to claim 1, wherein, The male joint of quick insertion includes a first insertion part, a main body middle part, and a second insertion part arranged in sequence and integrally connected, the first insertion part, the main body middle part, and the second insertion part are hollow structures and the internal cavities are interconnected, the first insertion part is used for communicating with the metal female joint, the outer periphery is provided with a limiting baffle and a plurality of sealing grooves one spacedly distributed, the sealing groove one is provided with a sealing ring one, the outer periphery of the main body middle part is provided with a circular truncated cone, the limiting baffle is located between the sealing groove one and the circular truncated cone, and the second insertion part is used for communicating with the oil tank.

6. A low emission fuel fill pipe of all metal construction according to claim 5, wherein, The metal female joint includes a pipeline connecting part, a joint connecting part, and a sleeve connecting part arranged in sequence and integrally connected, the joint connecting part is sleeved on the outer periphery of the first insertion part, the outer periphery of the sleeve connecting part is provided with two clamping grooves symmetrically distributed, the clamping grooves are clamped and connected with elastic clamps, the clamps abut against the limiting baffle, and the side surface of the sleeve connecting part abuts against the circular truncated cone.

7. A low emission fuel fill pipe of all metal construction according to claim 5, wherein, The first insertion part, the main body middle part, the second insertion part, and the circular truncated cone are all made of plastic injection, and the sealing ring one is made of one of silicon rubber, fluorine rubber, and fluorosilicone rubber.

8. A low emission fuel fill pipe of all metal construction according to claim 1, wherein, The second insertion part extends into the check valve, the check valve includes a valve cap, the bottom of the valve cap is provided with a reversible cover plate through a torsion spring and a pin, and the cover plate is used for opening or closing the internal passage of the valve cap.

9. A low emission fuel fill pipe of all metal construction according to claim 8, wherein, The outer periphery of the valve cap is provided with a positioning groove and a plurality of square grooves, the second insertion part is provided with a positioning block corresponding to the positioning groove, a wedge-shaped block corresponding to the square grooves, and a limiting step corresponding to the top of the valve cap, the outer periphery of the limiting step is provided with a sealing groove two, and the sealing groove two is provided with a sealing ring two.

10. A low emission fuel fill pipe of all metal construction according to claim 1, wherein, The metal circulating pipe keeps consistent with the bending section, the outer side of the bending section is provided with a plurality of metal fixing frames spacedly distributed along the length direction, the metal fixing frames are provided with mounting holes, and the outer periphery of the circulating pipe is connected with the metal fixing frames.

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