NNMF nylon hose sealing joint

Abstract

The invention belongs to the technical field of pipe joint manufacturing, and particularly relates to an NNMF nylon hose sealing joint which comprises a joint body, a cap and a special-shaped sealing ring, the inner diameter of the right section of the joint body is larger than that of the left section of the joint body, a partition ring is coaxially arranged between the left section and the right section of the joint body, and external threads are arranged on the circumferential face of the right end of the joint body; internal threads matched with the external threads are arranged on the cap, an inner flange is arranged on the inner circumferential surface of one end of the cap, the outer diameter of one end of the special-shaped sealing ring is larger than that of the other end of the special-shaped sealing ring, the outer diameter of the large-head end of the special-shaped sealing ring is larger than the inner diameter of the inner flange on the cap, and the outer diameter of the large-head end of the special-shaped sealing ring is smaller than the inner diameter of the cap; according to the NNMF nylon hose sealing joint, the mode that the special-shaped sealing ring is matched with the cap provided with the inner flange is adopted, the risk of thread loosening caused by vibration or material creep deformation of the hose joint can be reduced, the sealing pressure stability is indirectly maintained, and the problem how to prevent the sealing performance of the hose joint from being reduced is solved.

Description

Technical Field

[0001] This application belongs to the field of pipe fitting manufacturing technology, specifically an NNMF nylon hose sealing fitting. Background Technology

[0002] In complex environments such as dynamic vibration, issues such as vibration, material creep, and gaps caused by hose bending deformation can easily lead to a decrease in protection level. Therefore, it is necessary to develop fittings suitable for nylon hoses to improve the core dynamic sealing performance of the product and meet the requirements of IP68 protection level and long-term harsh operating conditions. Summary of the Invention

[0003] The purpose of this application is to address the shortcomings of existing technologies by using a special-shaped sealing ring in conjunction with a cap with an inner flange to design an NNMF nylon hose sealing joint. This reduces the risk of thread loosening caused by vibration or material creep in the hose joint, indirectly maintains the stability of the sealing pressure, and solves the problem of how to prevent the hose joint from deteriorating in sealing performance.

[0004] The above-mentioned technical objective of this application is achieved through the following technical solution: An NNMF nylon hose sealing connector includes a connector body, a cap, and a shaped sealing ring. The inner diameter of the right section of the connector body is larger than that of the left section. A spacer ring is coaxially provided between the left and right sections of the connector body. An external thread is provided on the circumferential surface of the right end of the connector body. An internal thread that mates with the external thread is provided on the cap. An inner flange is provided on the inner circumferential surface of one end of the cap. The outer diameter of one end of the shaped sealing ring is larger than that of the other end. The outer diameter of the larger end of the shaped sealing ring is larger than the inner diameter of the inner flange on the cap. The outer diameter of the larger end of the shaped sealing ring is smaller than the inner diameter of the cap.

[0005] Preferably, it further includes a first conical sealing ring, wherein the outer diameter of one end of the first conical sealing ring is smaller than the outer diameter of the other end, and a convex ring is coaxially provided on the inner circumferential surface of the end of the first conical sealing ring with a relatively smaller outer diameter, wherein the outer diameter of the convex ring is larger than the inner diameter of the partition ring.

[0006] Preferably, the irregular sealing ring includes a cylindrical sealing ring body, and an annular protrusion is coaxially provided on the outer circumferential surface of one end of the sealing ring body. The outer diameter of the annular protrusion is the outer diameter of the large end of the irregular sealing ring. An inner protrusion is also provided on the inner circumferential surface of the end of the sealing ring body where the annular protrusion is located.

[0007] Preferably, the thread pitch between the connector body and the cap is 2.0.

[0008] Preferably, the first conical sealing ring is made of high-performance fluororubber material.

[0009] The beneficial effects of this application are: This application employs a non-circular sealing ring in conjunction with a cap having an inner flange to design an NNMF nylon hose sealing joint. This reduces the risk of decreased sealing performance of the hose joint due to vibration or material creep, indirectly maintains the stability of the sealing pressure, and solves the problem of how to prevent the hose joint from deteriorating in sealing performance. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure in this application; Figure 2 for Figure 1 Cross-sectional view of AA in the middle; Figure 3 This is a schematic diagram of the structure of the irregular sealing ring and the first conical sealing ring 6 in this application; Figure 4 for Figure 3 Cross-sectional view.

[0011] The components are: 1. Connector body; 2. Cap; 3. NNMF nylon hose; 4. Spacer ring; 5. Inner flange; 6. First conical sealing ring; 7. Raised ring; 8. Annular protrusion; 9. Sealing ring body; 10. Inner protrusion; 11. Barb structure. Detailed Implementation

[0012] like Figure 1-4 As shown, an NNMF nylon hose sealing connector includes a connector body 1, a cap 2, and a shaped sealing ring. The inner diameter of the right section of the connector body 1 is larger than that of the left section. A spacer ring 4 is coaxially provided between the left and right sections of the connector body 1. An external thread is provided on the circumferential surface of the right end of the connector body 1. An internal thread that mates with the external thread is provided on the cap 2. An inner flange 5 is provided on the inner circumferential surface of one end of the cap 2. The outer diameter of one end of the shaped sealing ring is larger than that of the other end. The outer diameter of the larger end of the shaped sealing ring is larger than the inner diameter of the inner flange 5 on the cap 2. The outer diameter of the larger end of the shaped sealing ring is smaller than the inner diameter of the cap 2.

[0013] The system also includes a first conical sealing ring 6. One end of the first conical sealing ring 6 has a smaller outer diameter than the other end. A convex ring 7 is coaxially provided on the inner circumferential surface of the end with the smaller outer diameter of the first conical sealing ring 6. The outer diameter of the convex ring 7 is larger than the inner diameter of the spacer ring 4. The convex ring 7 ensures that the nylon hose 3 is held in place after insertion, allowing the first conical sealing ring 6 to wrap around the end of the nylon hose 3 inserted into the connector body 1, thus providing a seal.

[0014] As a preferred embodiment, the irregular sealing ring includes a cylindrical sealing ring body 9. An annular protrusion 8 is coaxially provided on the outer circumferential surface of one end of the sealing ring body 9. The outer diameter of the annular protrusion 8 is the same as the outer diameter of the larger end of the irregular sealing ring. An inner protrusion 10 is also provided on the inner circumferential surface of the end of the sealing ring body 9 where the annular protrusion 8 is located. The function of the inner protrusion 10 is to hook onto the nylon hose 3.

[0015] As a preferred embodiment, the thread pitch between the connector body 1 and the cap 2 is 2.0.

[0016] In this embodiment, the inner and outer circumferential surfaces of the first conical sealing ring 6 are provided with barbed structures 11. The barbed structure design makes the connection between the nylon hose 3 and the connector body 1 more stable. The shape of the first conical sealing ring 6 is a conical pagoda head, which expands and fits with the nylon hose 3. Further sealing is achieved by squeezing the irregular sealing ring with the cap 2. The structure is stable and reliable, and provides excellent anti-pull-out ability.

[0017] The first conical sealing ring 6 is made of high-performance fluororubber, which is resistant to ultra-low temperatures (-50℃), has stable mechanical properties, strong creep resistance and flexibility, and is suitable for harsh low-temperature and high-load environments. The threads between the connector body 1 and the cap 2 have a 2.0 pitch. The large pitch effectively reduces problems such as thread stripping and loosening caused by material deformation and vibration. The coarse thread shortens the tightening stroke, improving installation efficiency and quickly reaching the required preload, ensuring effective compression of the irregular sealing ring. The large pitch increases the thread contact area and engagement depth, disperses stress, reduces the risk of thread loosening due to vibration or material creep, and indirectly maintains the stability of the sealing pressure.

[0018] The overall design reduces the risk of thread loosening due to vibration or material creep, indirectly maintaining the stability of the sealing pressure.

Claims

1. A sealing connector for NNMF nylon hoses, characterized in that, The device includes a connector body (1), a cap (2), and a special-shaped sealing ring. A spacer ring (4) is coaxially provided between the left and right sections of the connector body (1). An external thread is provided on the circumferential surface of the right section of the connector body (1). An internal thread that mates with the external thread is provided on the cap (2). An inner flange (5) is provided on the inner circumferential surface of one end of the cap (2). The outer diameter of one end of the special-shaped sealing ring is larger than the outer diameter of the other end. The outer diameter of the larger end of the special-shaped sealing ring is larger than the inner diameter of the inner flange (5) on the cap (2). The outer diameter of the larger end of the special-shaped sealing ring is smaller than the inner diameter of the cap (2).

2. The NNMF nylon hose sealing joint according to claim 1, characterized in that: It also includes a first conical sealing ring (6), the outer diameter of one end of the first conical sealing ring (6) is smaller than the outer diameter of the other end, and a convex ring (7) is coaxially provided on the inner circumferential surface of the end with the relatively smaller outer diameter of the first conical sealing ring (6), the outer diameter of the convex ring (7) is larger than the inner diameter of the partition ring (4).

3. The NNMF nylon hose sealing joint according to claim 2, characterized in that: The irregular sealing ring includes a cylindrical sealing ring body (9). An annular protrusion (8) is coaxially provided on the outer circumferential surface of one end of the sealing ring body (9). The outer diameter of the annular protrusion (8) is the outer diameter of the large end of the irregular sealing ring. An inner protrusion (15) is also provided on the inner circumferential surface of the end of the annular protrusion (8) on the sealing ring body (9).

4. The NNMF nylon hose sealing joint according to claim 3, characterized in that: The thread pitch between the connector body (1) and the cap (2) is 2.

0.

5. The NNMF nylon hose sealing joint according to claim 2, characterized in that: The first conical sealing ring (6) is provided with a barb structure, and the barb is directed toward the larger end of the first conical sealing ring (6).

6. The NNMF nylon hose sealing joint according to claim 1, characterized in that: The inner diameter of the right section of the connector body (1) is larger than the inner diameter of the left section.

7. A sealing connector for NNMF nylon hoses according to any one of claims 1-6, characterized in that: The first conical sealing ring (6) is made of high-performance fluororubber.

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