A leak-proof quick-connect pipe fitting

Abstract

This utility model discloses a leak-proof quick-connect pipe fitting. The quick-connect fitting connects two pipe sections, one end of which has a pipe limiting structure, including a first quick-connect fitting, a second quick-connect fitting, and a fastening nut fitted onto both the first and second quick-connect fittings. The first quick-connect fitting, fitted onto the pipe, has a fitting limiting structure that provides dual limiting for both the pipe and the fastening nut. The second quick-connect fitting connects to another pipe section. The fastening nut has an anti-loosening pin that passes through the fastening nut and abuts against the outer wall of the second quick-connect fitting. This utility model, through the combination of the first quick-connect fitting, the second quick-connect fitting, and the fastening nut, improves the reliability of the pipe connection. Furthermore, the anti-loosening pin secures the fastening nut and the second quick-connect fitting, further enhancing the reliability of the connection.

Description

Technical fields:

[0001] This utility model belongs to the field of liquid pipeline joint technology, and specifically relates to a leak-proof quick-connect pipe joint. Background technology:

[0002] In industrial piping systems, transportation equipment such as trains and automobiles, and fluid transport devices, the reliability of pipe connections directly affects the system's sealing and safety. Currently, common pipe connection methods use nuts or threads, which, while simple in structure and easy to install, still have the following shortcomings in practical applications: thermal expansion and contraction can easily lead to seal failure. Pipes expand and contract with temperature changes, especially metal or plastic pipes. In environments with large temperature differences, such as outdoors or under high and low temperature conditions, the connection points deform due to differences in material expansion and contraction rates, resulting in gaps in the sealing surface and leakage of the transported medium. Vibration can cause loosening of the connection. In moving equipment such as trains and automobiles, pipes are subjected to long-term mechanical vibration or impact. Traditional nut connections are prone to gradually loosening due to vibration, thus increasing the risk of seal failure and, in severe cases, even causing leakage accidents, affecting the normal operation of equipment and increasing maintenance costs. Based on the above shortcomings, this application provides a leak-proof quick-connect pipe fitting.

[0003] The information disclosed in this background section is intended only to enhance the understanding of the overall background of this utility model and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility model content:

[0004] The purpose of this utility model is to provide a leak-proof quick-connect pipe fitting, thereby overcoming the defects in the prior art.

[0005] To achieve the above objectives, this utility model provides a leak-proof quick-connect pipe coupling. The quick-connect coupling is used to connect two pipe sections. One end of the pipe is provided with a pipe limiting structure, including a first quick-connect coupling, a second quick-connect coupling, and a fastening nut sleeved on the first quick-connect coupling and the second quick-connect coupling. The first quick-connect coupling is sleeved on the pipe and has a connector limiting structure, which serves to limit both the pipe and the fastening nut. The second quick-connect coupling is used to connect another pipe section. The fastening nut is provided with an anti-loosening pin, which passes through the fastening nut and abuts against the outer wall of the second quick-connect coupling.

[0006] Furthermore, as a preferred embodiment, the outer wall of the fastening nut is provided with a fastening groove, and the anti-loosening pin passes through the fastening groove and abuts against the outer wall of the second quick connector.

[0007] Furthermore, as a preferred embodiment, the anti-loosening pin is provided with a pin cap, the pin cap is provided with a through hole, a steel wire is inserted through the through hole, the steel wire is tightened after wrapping around the outer wall of the fastening nut at least once in the fastening groove, and the steel wire is used to lock the anti-loosening pin and the fastening nut.

[0008] Furthermore, as a preferred embodiment, the first quick connector includes a tail section, a main body section, and a front section. The connector limiting structure is an outwardly protruding structure provided in the front section. The inner wall of the fastening nut is provided with an inner wall groove structure for clamping the outwardly protruding structure. The pipe limiting structure is located outside the front section.

[0009] Furthermore, preferably, the tail of the first quick-connect fitting extends beyond the fastening nut.

[0010] Furthermore, as a preferred embodiment, the end of the second quick connector is provided with a groove structure, and a sealing ring is provided within the groove structure.

[0011] Furthermore, preferably, the sealing ring is an O-ring.

[0012] Furthermore, as a preferred embodiment, the second quick-connect fitting includes an external thread section and an internal thread section, wherein the external thread section is engaged with a fastening nut and the internal thread section is engaged with another section of pipe.

[0013] Furthermore, as a preferred embodiment, the second quick-connect coupling includes a first external thread section, an intermediate section, and a second external thread section, wherein the first external thread section and the second external thread section are respectively mated with a fastening nut.

[0014] Furthermore, preferably, the diameter of the outer wall of the intermediate section is the same as the diameter of the outer wall of the fastening nut.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] (1) This utility model can improve the reliability of pipe connection and reduce the risk of sealing failure caused by thermal expansion and contraction through the combination structure of the first quick connector, the second quick connector and the fastening nut.

[0017] (2) The end of the pipe of this utility model is provided with a pipe limiting structure. This structure can be locked between the first quick connector and the second quick connector. Even under vibration, the connector and the pipe are difficult to loosen, and the connection reliability is high.

[0018] (3) The present invention also includes an anti-loosening pin, which secures the fastening nut and the second quick connector, thereby further improving the reliability of the connection between the two and reducing the risk of loosening.

[0019] (4) The pin cap of this utility model is provided with a through hole, and a steel wire is inserted through the through hole. The steel wire can further lock the fastening nut and the second quick connector, improve the reliability of the connection between the two, and reduce the risk of loosening.

[0020] (5) The present invention provides a fastening groove on the outer wall of the fastening nut, and the anti-loosening pin and steel wire can be operated in the fastening groove, making the overall structure more beautiful. Attached image description:

[0021] Figure 1 This is a schematic diagram of a leak-proof quick-connect pipe fitting according to the present invention;

[0022] Figure 2 This is a partially enlarged schematic diagram of a leak-proof quick-connect pipe fitting according to the present invention;

[0023] Figure 3 This is a cross-sectional view of a leak-proof quick-connect pipe fitting according to the present invention;

[0024] Figure 4 This is a partially enlarged cross-sectional view of a leak-proof quick-connect pipe fitting according to this utility model.

[0025] Figure 5 This is a cross-sectional view of the second quick-connect fitting of a leak-proof pipe quick-connect fitting according to this utility model;

[0026] Figure 6 This is a cross-sectional view of another embodiment of the leak-proof quick-connect pipe fitting of this utility model;

[0027] Figure 7 This is a cross-sectional view of a second quick-connect fitting, which is another embodiment of the leak-proof quick-connect fitting for pipes according to this utility model.

[0028] Reference numerals: 1-pipe, 11-pipe limiting structure, 2-first quick connector, 21-connector limiting structure, 22-tail section, 23-main body section, 24-front section, 3-second quick connector, 31-groove structure, 32-sealing ring, 33-external thread section, 34-internal thread section, 35-first external thread section, 36-middle section, 37-second external thread section, 4-fastening nut, 41-fastening groove, 42-inner wall groove structure, 43-buffer gap, 44-pin hole, 5-anti-loosening pin, 51-pin cap, 52-through hole, 53-steel wire. Detailed implementation method:

[0029] The specific embodiments of this utility model are described in detail below, but it should be understood that the protection scope of this utility model is not limited to the specific embodiments.

[0030] The following provides a brief overview of one or more aspects to offer a basic understanding of them. This overview is not an exhaustive summary of all conceived aspects, nor is it intended to identify key or decisive elements of all aspects, nor to define the scope of any or all aspects. Its sole purpose is to present some concepts of one or more aspects in a simplified form to prepare for the more detailed descriptions that follow.

[0031] Example 1:

[0032] like Figure 1-5 As shown, a leak-proof quick-connect pipe coupling is used to connect two pipe sections 1. One end of each pipe section 1 is provided with a pipe limiting structure 11, including a first quick-connect coupling 2, a second quick-connect coupling 3, and a fastening nut 4 sleeved on the first quick-connect coupling 2 and the second quick-connect coupling 3. The first quick-connect coupling 2 is sleeved on the pipe section 1 and is provided with a connector limiting structure 21, which is used for double limiting of the pipe section 1 and the fastening nut 4. The second quick-connect coupling 3 is used to connect another pipe section. The fastening nut 4 is provided with an anti-loosening pin 5, which passes through the fastening nut 4 and abuts against the outer wall of the second quick-connect coupling 3.

[0033] In this embodiment, as a specific solution, the outer wall of the fastening nut 4 is provided with a fastening groove 41, and the anti-loosening pin 5 passes through the fastening groove 41 and abuts against the outer wall of the second quick connector 3; more specifically, the fastening groove 41 can accommodate the anti-loosening pin 5, so that the anti-loosening pin 5 does not protrude to the outer wall of the fastening nut 4, thus avoiding the anti-loosening pin 5 from scratching external items as a protruding foreign object; at the same time, the absence of an outward protrusion structure also facilitates the overall neat layout of the pipeline and does not affect the installation space; in addition, it can also avoid the problem of easy loosening due to accidental contact caused by outward protrusion.

[0034] In this embodiment, as a specific solution, the anti-loosening pin 5 is provided with a pin cap 51, the pin cap 51 is provided with a through hole 52, and a steel wire 53 is inserted through the through hole 52. The steel wire 53 is tightened after wrapping around the outer wall of the fastening nut 4 at least once in the fastening groove 41. The steel wire 53 is used to lock the anti-loosening pin 5 and the fastening nut 4. More specifically, the steel wire 53 is also in the fastening groove 41 and does not need to protrude outside the fastening nut 4, which is more aesthetically pleasing and also makes it easier to arrange the pipeline neatly without affecting the installation space.

[0035] In this embodiment, as a specific solution, the first quick connector 2 includes a tail section 22, a main body section 23, and a front section 24. The connector limiting structure 21 is an outwardly protruding structure provided in the front section 24. The inner wall of the fastening nut 4 is provided with an inner wall groove structure 42 for clamping the outwardly protruding structure. The pipe limiting structure 11 is located outside the front section 24. More specifically, the pipe limiting structure 11 is a protruding structure provided outside the pipe. After assembly, this structure is located between the ends of the first quick connector 2 and the second quick connector 3, and is clamped by the two.

[0036] In this embodiment, as a specific solution, the tail of the first quick connector 2 extends beyond the fastening nut 4.

[0037] In this embodiment, as a more specific solution, the tail section 22 of the first quick connector 2 is a conical structure. During assembly, the fastening nut 4 is nested from the tail section 22 of the first quick connector 2 toward the front section 24. The conical tail section design makes it easier for the fastening nut 4 to be nested.

[0038] In this embodiment, as a more specific solution, the end of the front section 24 of the first quick connector 2 and the pipe limiting structure 1 and the inner wall groove structure 42 also have a buffer gap 43. This gap provides a certain buffer space at the joint when thermal expansion and contraction occur, thereby improving the reliability of the joint.

[0039] In this embodiment, as a specific solution, the fastening nut 4 is provided with several pin holes 44. After assembly, the anti-loosening pin 5 is screwed in from the most convenient pin hole 44.

[0040] In this embodiment, as a specific solution, the end of the second quick connector 3 is provided with a groove structure 31, and a sealing ring 32 is provided in the groove structure 31; more specifically, the sealing ring is an O-ring.

[0041] In this embodiment, as a specific solution, the second quick connector 3 includes an external thread section 33 and an internal thread section 34. The external thread section 33 is mated with a fastening nut 34, and the internal thread section 34 is mated with another section of pipe.

[0042] The usage method of this embodiment is as follows:

[0043] The first quick connector 2 is pre-nested on the pipe 1, the fastening nut 4 is nested on the first quick connector 2, the external thread section 33 of the second quick connector 3 is screwed into the fastening nut 4, and another pipe is screwed into the internal thread section 34 of the second quick connector 3. Finally, the fastening nut 4 and the second quick connector 3 are fastened from the outer wall of the fastening nut 4 with the anti-loosening pin 5 to improve the reliability of the connection.

[0044] The first quick-connector 2, the second quick-connector 3, and the fastening nut 4 can be made of plastic or metal.

[0045] like Figures 6-7 As shown, in another specific embodiment, the second quick connector 3 includes a first external thread section 35, an intermediate section 36, and a second external thread section 37, wherein the first external thread section 35 and the second external thread section 37 are respectively mated with a fastening nut 4.

[0046] In this embodiment, as a specific solution, the diameter of the outer wall of the intermediate section 36 is the same as the diameter of the outer wall of the fastening nut 4.

[0047] The usage method of this embodiment is as follows:

[0048] The first quick-connector 2 is pre-nested on the pipe 1, and the fastening nut 4 is nested on the first quick-connector 2. The first external thread section 35 of the second quick-connector 3 is screwed into the fastening nut 4. Similarly, another pipe is connected to another quick-connector and fastening nut, and the second external thread section 35 is screwed into another fastening nut 4. Finally, the fastening nut 4 and the second quick-connector 3 are fastened from the outer wall of the fastening nut 4 with the anti-loosening pin 5 to improve the reliability of the connection.

[0049] This utility model has the following advantages:

[0050] 1. This utility model, through the combination structure of a first quick-connect coupling, a second quick-connect coupling, and a fastening nut, can improve the reliability of pipe connections and reduce the risk of seal failure caused by thermal expansion and contraction.

[0051] 2. The pipe end of this utility model is provided with a pipe limiting structure, which can be locked between the first quick connector and the second quick connector. Even under vibration, the connector and the pipe are difficult to loosen, and the connection reliability is high.

[0052] 3. This utility model also includes an anti-loosening pin, which secures the fastening nut and the second quick-connect fitting, thereby further improving the reliability of the connection between the two and reducing the risk of loosening.

[0053] 4. The pin cap of this utility model is provided with a through hole, and a steel wire is inserted through the through hole. The steel wire can further lock the fastening nut and the second quick connector, improve the reliability of the connection between the two, and reduce the risk of loosening.

[0054] 5. This utility model has a fastening groove on the outer wall of the fastening nut, and the anti-loosening pin and steel wire can be operated in the fastening groove, making the overall structure more beautiful.

[0055] The foregoing description of specific exemplary embodiments of the present invention is for illustrative and explanatory purposes. These descriptions are not intended to limit the present invention to the precise forms disclosed, and it will be apparent that many changes and variations can be made in accordance with the foregoing teachings. The exemplary embodiments were chosen and described in order to explain the specific principles of the present invention and its practical application, thereby enabling those skilled in the art to implement and utilize various different exemplary embodiments of the present invention, as well as various different choices and variations. The scope of the present invention is intended to be defined by the claims and their equivalents.

Claims

1. A leak-proof quick-connect pipe fitting, the quick-connect fitting being used to connect two pipe sections, wherein one end of the pipe section is provided with a pipe limiting structure, characterized in that: It includes a first quick-connect fitting, a second quick-connect fitting, and a fastening nut fitted onto the first quick-connect fitting and the second quick-connect fitting; the first quick-connect fitting is fitted onto the pipe and has a fitting limiting structure, which is used for double limiting of the pipe and the fastening nut; the second quick-connect fitting is used to connect another section of pipe; the fastening nut has an anti-loosening pin, which passes through the fastening nut and abuts against the outer wall of the second quick-connect fitting.

2. A leak resistant pipe quick coupling according to claim 1, wherein: The outer wall of the fastening nut is provided with a fastening groove, and the anti-loosening pin passes through the fastening groove and abuts against the outer wall of the second quick connector.

3. A leak resistant pipe quick coupling according to claim 2, wherein: The anti-loosening pin is provided with a pin cap, the pin cap is provided with a through hole, and a steel wire is inserted through the through hole. The steel wire is tightened after wrapping around the outer wall of the fastening nut at least once in the fastening groove. The steel wire is used to lock the anti-loosening pin and the fastening nut.

4. A quick connect leak resistant pipe coupling according to claim 1, wherein: The first quick-connector includes a tail section, a main body section, and a front section. The connector limiting structure is an outwardly protruding structure provided in the front section. The inner wall of the fastening nut is provided with an inner wall groove structure for clamping the outwardly protruding structure. The pipe limiting structure is located outside the front section.

5. A leak-proof quick-connect pipe fitting according to claim 4, characterized in that: The tail of the first quick-connect fitting extends beyond the fastening nut.

6. A quick connect leak resistant pipe coupling according to claim 1, wherein: The end of the second quick connector is provided with a groove structure, and a sealing ring is provided in the groove structure.

7. A leak resistant pipe quick coupling joint as claimed in claim 6, wherein: The sealing ring is an O-ring.

8. A quick connect leak resistant pipe coupling according to claim 1, wherein: The second quick-connect fitting includes an external thread section and an internal thread section. The external thread section is fitted with a fastening nut, and the internal thread section is fitted with another section of pipe.

9. A quick connect coupling for leak resistant pipe according to claim 1, wherein: The second quick-connector includes a first external thread section, an intermediate section, and a second external thread section, wherein the first external thread section and the second external thread section are respectively mated with a fastening nut.

10. A leak resistant pipe quick coupling joint as claimed in claim 9, wherein: The diameter of the outer wall of the middle section is the same as the diameter of the outer wall of the fastening nut.

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