Fuel system pipe leak-proof quick connector

Abstract

The utility model discloses a fuel system pipeline anti -leakage quick -operation joint relates to fuel system pipeline connection technical field. Including main part pipe, the inner wall of main part pipe is inserted with the connecting pipe, still include stepped sealing assembly, stepped sealing assembly sets up between main part pipe and connecting pipe, is used for to carry out stepped sealing when main part pipe and connecting pipe are connected, elastic compensation component, elastic compensation component sets up one end of main part pipe, through the stepped sealing assembly that sets up, through stepped sealing mode to prevent high pressure leak by utilizing different ladder hardness, simultaneously, through the elastic compensation component that sets up, make convenient to compensate the vibration that produces in the use process to ensure that connecting pipe and main part pipe closely adhere, secondly, through the extrusion connection component that sets up, make convenient to carry out quick extrusion connection with main part pipe to connecting pipe, and according to the extrusion degree of regulation elastic compensation component of specific demand simultaneously.

Description

Technical Field

[0001] This utility model relates to the field of fuel system pipeline connection technology, specifically a fuel system pipeline leak-proof quick connector. Background Technology

[0002] The sealing connection of fuel system pipelines is crucial to ensuring the safe operation of equipment, especially in the automotive and construction machinery industries. The reliability of the joints is directly related to fuel efficiency and safety. Currently, quick couplings are widely used in pipeline connections, but their sealing stability under long-term vibration environments is still insufficient.

[0003] In existing technologies, quick-connect fittings are prone to dynamic leakage through micro-gaps under vibration during fuel line use. When the equipment vibrates continuously, the seals of traditional fittings will develop micro-gaps due to elastic fatigue between the metal fitting and the seal. Under pressure, fuel can easily seep slowly through these gaps, especially low-viscosity fuels. Moreover, the initial leakage is extremely small and difficult to detect, which can lead to safety hazards and fuel waste in the long run. Therefore, there is an urgent need for a leak-proof quick-connect fitting for fuel system pipelines to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to provide a quick-connect coupling for fuel system pipelines to prevent leakage, thereby solving the problem mentioned in the background art where quick-connect couplings are prone to dynamic leakage with micro-gap under vibration conditions during fuel pipeline use.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a quick-connect coupling for leak-proof fuel system pipelines, comprising a main pipe, wherein a connecting pipe is inserted into the inner wall of the main pipe, and further comprising: A stepped sealing assembly is disposed between the main body pipe and the connecting pipe for performing a stepped seal when the main body pipe and the connecting pipe are connected. An elastic compensation component is disposed at one end of the main tube and is used to provide elastic compensation when the main tube is connected to the connecting tube. An extrusion connection assembly is disposed on the surface of the main tube and the connecting tube, and is used to quickly extrude and connect the connecting tube and the main tube.

[0006] Preferably, the stepped sealing assembly includes a first sealing ring disposed on the inner wall of the main tube, a second sealing ring disposed on the inner wall of the main tube, a first fixing groove formed on the surface of the connecting tube, the surface of the first sealing ring being fixedly connected to the inner wall of the first fixing groove, a second fixing groove formed on the surface of the connecting tube, the surface of the second sealing ring being fixedly connected to the inner wall of the second fixing groove, a contact groove formed on the inner wall of the main tube, one end of the second sealing ring abutting against the inner wall of the contact groove, one end of the first sealing ring abutting against one end of the main tube, a wedge-shaped groove formed on the inner wall of the main tube, and the insertion end of the connecting tube being wedge-shaped, the size of the insertion end of the connecting tube matching the size of the wedge-shaped groove.

[0007] Preferably, the elastic compensation component includes a compression spring, which is disposed at one end of the main tube. A compression groove is formed on the surface of the connecting tube. One end of the compression spring abuts against the inner wall of the compression groove. A washer is fitted on the surface of the main tube. The other end of the compression spring is fixedly connected to one end of the washer.

[0008] Preferably, the extrusion connection assembly includes an extrusion tube, which is rotatably connected to the surface of a connecting tube. The other end of the washer abuts against the inner wall of the extrusion tube. The surface of the main tube is provided with a first thread, and the inner wall of the extrusion tube is provided with a threaded groove. The extrusion tube is threadedly connected to the main tube through the first thread and the threaded groove.

[0009] Preferably, the surfaces of both the main tube and the connecting tube are provided with second threads, and a fixing head is threadedly connected to the surface of the second thread, and a wedge-shaped edge is provided on the inner wall of the fixing head.

[0010] Preferably, both the first sealing ring and the second sealing ring are made of fluororubber, and the hardness of the second sealing ring is greater than that of the first sealing ring.

[0011] Compared with the prior art, the beneficial effects of this utility model are: The stepped sealing component prevents high-pressure leakage by using different hardness levels. The elastic compensation component compensates for vibrations during use, ensuring a tight fit between the connecting pipe and the main pipe. The compression connection component allows for quick compression connection between the connecting pipe and the main pipe, and the compression force of the elastic compensation component can be adjusted according to specific needs. Attached Figure Description

[0012] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a cross-sectional structural diagram of the stepped sealing assembly of this utility model. Figure 3 This is a partial cross-sectional view of the extrusion connection assembly of this utility model; Figure 4 for Figure 3 Enlarged structural diagram at point A in the middle.

[0013] In the diagram: 1. Main tube; 2. Connecting tube; 3. Stepped sealing assembly; 301. First sealing ring; 302. Second sealing ring; 303. First fixing groove; 304. Second fixing groove; 305. Contact groove; 306. Wedge groove; 4. Elastic compensation assembly; 401. Compression spring; 402. Extrusion groove; 403. Washer; 5. Extrusion connection assembly; 501. Extrusion tube; 502. First thread; 503. Thread groove; 601. Second thread; 602. Fixing head; 603. Wedge edge. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] Please see Figure 1 - Figure 4 This utility model provides a quick-connect coupling for preventing leaks in fuel system pipelines, including a main pipe 1, a connecting pipe 2 inserted into the inner wall of the main pipe 1, a stepped sealing component 3 disposed between the main pipe 1 and the connecting pipe 2 for stepped sealing when the main pipe 1 and the connecting pipe 2 are connected, an elastic compensation component 4 disposed at one end of the main pipe 1 for elastic compensation when the main pipe 1 and the connecting pipe 2 are connected, and a compression connection component 5 disposed on the surface of the main pipe 1 and the connecting pipe 2 for quick compression connection of the connecting pipe 2 and the main pipe 1. The stepped sealing component 3 prevents high-pressure leakage by utilizing different step hardnesses through a stepped sealing method. Simultaneously, the elastic compensation component 4 facilitates compensation for vibrations generated during use, ensuring a tight fit between the connecting pipe 2 and the main pipe 1. Furthermore, the compression connection component 5 facilitates quick compression connection of the connecting pipe 2 and the main pipe 1, and the compression force of the elastic compensation component 4 can be adjusted according to specific needs.

[0016] Furthermore, the stepped sealing assembly 3 includes a first sealing ring 301 disposed on the inner wall of the main body tube 1, a second sealing ring 302 disposed on the inner wall of the main body tube 1, a first fixing groove 303 formed on the surface of the connecting tube 2, the surface of the first sealing ring 301 being fixedly connected to the inner wall of the first fixing groove 303, a second fixing groove 304 formed on the surface of the connecting tube 2, the surface of the second sealing ring 302 being fixedly connected to the inner wall of the second fixing groove 304, a contact groove 305 formed on the inner wall of the main body tube 1, one end of the second sealing ring 302 abutting against the inner wall of the contact groove 305, one end of the first sealing ring 301 abutting against one end of the main body tube 1, a wedge-shaped groove 306 formed on the inner wall of the main body tube 1, and the insertion end of the connecting tube 2 being wedge-shaped, the size of the insertion end of the connecting tube 2 matching that of the wedge-shaped groove 306. Through the stepped sealing assembly 3, the insertion of the connecting tube 2... The end of the connecting pipe 2 and the inner wall of the main pipe 1 are provided with wedge-shaped grooves 306 for mutual cooperation, which facilitates the initial sealing between the main pipe 1 and the connecting pipe 2. At the same time, the wedge-shaped cooperation design increases the contact area and improves the sealing strength. Secondly, one end of the second sealing ring 302 abuts against the inner wall of the contact groove 305, which facilitates the re-sealing of the gap between the connecting pipe 2 and the main pipe 1. Meanwhile, one end of the first sealing ring 301 abuts against one end of the main pipe 1, which facilitates the filling and sealing of the gap between the connecting pipe 2 and the main pipe 1. Through the stepped distribution of the second sealing ring 302 and the first sealing ring 301, and the cooperation of the second fixing groove 304 and the first fixing groove 303, it is easy for one end of the second sealing ring 302 and one end of the first sealing ring 301 to fit tightly against the inner wall of the contact groove 305 and one end of the connecting pipe 2, thereby improving the overall sealing strength and reducing the probability of leakage. It should be noted that both the first sealing ring 301 and the second sealing ring 302 are made of fluororubber. The hardness of the second sealing ring 302 is greater than that of the first sealing ring 301. By using the first sealing ring 301 and the second sealing ring 302 with different hardnesses, the second sealing ring 302 has high hardness and strong wear resistance, which can withstand the high pressure of the fuel system and block most fuel leakage. The first sealing ring 301 has better elasticity and can fill the tiny gaps between the hard sealing ring and the joint. The two work together to form a gradient seal, which improves the sealing reliability under vibration environment and is suitable for different working conditions.

[0017] Furthermore, the elastic compensation component 4 includes a compression spring 401, which is disposed at one end of the main tube 1. A compression groove 402 is formed on the surface of the connecting tube 2. One end of the compression spring 401 abuts against the inner wall of the compression groove 402. A washer 403 is fitted on the surface of the main tube 1. The other end of the compression spring 401 is fixedly connected to one end of the washer 403. Through the elastic compensation component 4, the deformation generated by the compression spring 401 during use pushes the connecting tube 2 to move slightly axially, thereby facilitating the compensation of vibrations generated during use and ensuring that the insertion end of the connecting tube 2 fits tightly with the wedge groove 306, further improving the overall sealing strength.

[0018] Furthermore, the extrusion connection assembly 5 includes an extrusion tube 501, which is rotatably connected to the surface of the connecting tube 2. The other end of the washer 403 abuts against the inner wall of the extrusion tube 501. The surface of the main tube 1 is provided with a first thread 502, and the inner wall of the extrusion tube 501 is provided with a threaded groove 503. The extrusion tube 501 is threadedly connected to the main tube 1 through the first thread 502 and the threaded groove 503. Through the extrusion connection assembly 5, the extrusion tube 501 is threadedly connected to the main tube 1 through the first thread 502 and the threaded groove 503. At the same time, the other end of the washer 403 abuts against the inner wall of the extrusion tube 501, which facilitates the compression spring 401 to be extruded while the extrusion tube 501 is rotated to quickly connect the connecting tube 2 and the main tube 1. This allows the compression spring 401 to push the connecting tube 2 and the wedge groove 306 and the contact groove 305 inside the main tube 1 to form a tight connection, thereby facilitating dynamic compensation while the connecting tube 2 and the main tube 1 are quickly fixed.

[0019] Furthermore, both the main body tube 1 and the connecting tube 2 have second threads 601 on their surfaces. A fixing head 602 is threaded onto the surface of the second threads 601. A wedge-shaped edge 603 is provided on the inner wall of the fixing head 602. The second threads 601, the fixing head 602, and the wedge-shaped edge 603 work together to allow the two fuel pipes to be connected to pass through the inner wall of the fixing head 602 and be press-fitted onto the surfaces of the main body tube 1 and the connecting tube 2, respectively. When the fixing head 602 is connected, the surfaces of the fuel pipes are squeezed, which facilitates a tight connection between the two fuel pipes and the main body tube 1 and the connecting tube 2, respectively. The wedge-shaped edge 603 increases the squeezing area of ​​the fuel pipes when the fixing head 602 squeezes them, thus preventing damage to the fuel pipes while ensuring a tight fixation.

[0020] Working principle: In use, the second thread 601, the fixing head 602 and the wedge edge 603 work together to allow the two fuel pipes to be connected to pass through the inner wall of the fixing head 602 and be press-fitted onto the surfaces of the main body pipe 1 and the connecting pipe 2 respectively. When the fixing head 602 is connected, the surfaces of the fuel pipes are squeezed, which facilitates the tight connection of the two fuel pipes to the main body pipe 1 and the connecting pipe 2 respectively.

[0021] Meanwhile, the elastic compensation component 4 allows the deformation of the compression spring 401 during use to push the connecting pipe 2 to move slightly axially, thereby facilitating the compensation of vibrations generated during use and ensuring that the insertion end of the connecting pipe 2 fits tightly with the wedge groove 306, further improving the overall sealing strength.

[0022] Secondly, through the extrusion connection component 5, the extrusion tube 501 is threadedly connected to the main tube 1 through the first thread 502 and the thread groove 503. At the same time, the other end of the washer 403 abuts against the inner wall of the extrusion tube 501. This facilitates the compression of the compression spring 401 while the extrusion tube 501 is rotated to quickly connect the connecting tube 2 and the main tube 1. This causes the compression spring 401 to push the connecting tube 2 to the wedge groove 306 and the contact groove 305 inside the main tube 1 for a tight connection. This facilitates dynamic compensation while the connecting tube 2 and the main tube 1 are quickly fixed.

[0023] Furthermore, the stepped sealing assembly 3 allows the insertion end of the connecting pipe 2 to engage with the wedge-shaped groove 306 on the inner wall of the main pipe 1, facilitating the initial sealing between the main pipe 1 and the connecting pipe 2. The wedge-shaped fit also increases the contact area and improves the sealing strength. Additionally, one end of the second sealing ring 302 abuts against the inner wall of the contact groove 305, facilitating a second sealing of the gap between the connecting pipe 2 and the main pipe 1. Simultaneously, one end of the first sealing ring 301 abuts against one end of the main pipe 1, facilitating the filling and sealing of the gap between the connecting pipe 2 and the main pipe 1. The stepped distribution of the second sealing ring 302 and the first sealing ring 301, along with the second fixing groove 304 and the first fixing groove 303, ensures that one end of the second sealing ring 302 and one end of the first sealing ring 301 are tightly fitted against the inner wall of the contact groove 305 and one end of the connecting pipe 2, thereby improving the overall sealing strength and reducing the probability of leakage.

[0024] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A fuel system pipe leak-proof quick connector, comprising a main pipe (1), a connecting pipe (2) is inserted into the inner wall of the main pipe (1), characterized in that, Also includes: A stepped sealing assembly (3) is disposed between the main body pipe (1) and the connecting pipe (2) for performing a stepped seal when the main body pipe (1) and the connecting pipe (2) are connected. Elastic compensation component (4), the elastic compensation component (4) is disposed at one end of the main tube (1) and is used to provide elastic compensation when the main tube (1) is connected to the connecting tube (2); The extrusion connection assembly (5) is disposed on the surface of the main tube (1) and the connecting tube (2) for quickly extruding the connecting tube (2) and the main tube (1).

2. A fuel system anti-leak quick coupling according to claim 1, wherein: The stepped sealing assembly (3) includes a first sealing ring (301) disposed on the inner wall of the main body tube (1), a second sealing ring (302) disposed on the inner wall of the main body tube (1), a first fixing groove (303) formed on the surface of the connecting tube (2), the surface of the first sealing ring (301) being fixedly connected to the inner wall of the first fixing groove (303), and a second fixing groove (304) formed on the surface of the connecting tube (2), and the second sealing ring (302) being... The surface of the main tube (1) is fixedly connected to the inner wall of the second fixing groove (304). The inner wall of the main tube (1) is provided with a contact groove (305). One end of the second sealing ring (302) abuts against the inner wall of the contact groove (305). One end of the first sealing ring (301) abuts against one end of the main tube (1). The inner wall of the main tube (1) is provided with a wedge groove (306). The insertion end of the connecting tube (2) is wedge-shaped. The size of the insertion end of the connecting tube (2) matches that of the wedge groove (306).

3. A fuel system anti-leak quick coupling according to claim 1, wherein: The elastic compensation component (4) includes a compression spring (401), which is disposed at one end of the main tube (1). The surface of the connecting tube (2) is provided with an extrusion groove (402). One end of the compression spring (401) abuts against the inner wall of the extrusion groove (402). A washer (403) is sleeved on the surface of the main tube (1). The other end of the compression spring (401) is fixedly connected to one end of the washer (403).

4. A fuel system anti-leak quick coupling according to claim 3, wherein: The extrusion connection assembly (5) includes an extrusion tube (501), which is rotatably connected to the surface of the connecting tube (2). The other end of the washer (403) abuts against the inner wall of the extrusion tube (501). The surface of the main tube (1) is provided with a first thread (502), and the inner wall of the extrusion tube (501) is provided with a threaded groove (503). The extrusion tube (501) is threadedly connected to the main tube (1) through the first thread (502) and the threaded groove (503).

5. A fuel system anti-leak quick coupling according to claim 1, wherein: The surfaces of the main tube (1) and the connecting tube (2) are provided with second thread teeth (601), and the surface of the second thread teeth (601) is threaded with a fixing head (602). The inner wall of the fixing head (602) is provided with a wedge-shaped edge (603).

6. A fuel system anti-leak quick coupling according to claim 2, wherein: The first sealing ring (301) and the second sealing ring (302) are both made of fluorine rubber, and the hardness of the second sealing ring (302) is greater than that of the first sealing ring (301).

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