Quick connector sealing connecting piece for small-caliber glass fiber reinforced plastic pipe

Abstract

The utility model relates to the technical field of pipeline connection, and discloses a quick connector sealing connecting piece for a small-caliber glass fiber reinforced plastic pipe, which comprises an outer base sleeve and a sealing ring fixedly arranged in the outer base sleeve, and a limiting convex ring and two groups of inverted tooth sealing rings which are symmetrically arranged relative to the limiting convex ring are formed on the inner wall of the sealing ring. The number of the sealing rings in each group is not less than two, and the cross section of each inverted tooth sealing ring is triangular. The problems that existing glass reinforced plastic pipe connection is time-consuming, labor-consuming and low in efficiency are solved, and meanwhile, the sealing ring can adapt to deformation of the glass reinforced plastic pipe while guaranteeing the sealing performance.

Description

Technical Field

[0001] This utility model relates to the field of pipeline connection technology, and in particular to a quick-connect sealing connector for small-diameter fiberglass pipes. Background Technology

[0002] Fiberglass reinforced plastic (FRP) pipes are lightweight, high-strength, and corrosion-resistant non-metallic pipes. They are made by winding glass fibers with a resin matrix layer by layer onto a rotating mandrel according to process requirements. Their pipe wall structure is rationally designed and advanced, fully utilizing the material's properties. While meeting strength requirements, it improves rigidity, ensuring product stability and reliability. Currently, the connection methods for FRP pipes in industrial applications with diameters below DN200 mainly rely on traditional manual pasting plain-end connections or flange connections. These methods are time-consuming and labor-intensive, relatively inefficient, and flange joints are mostly rigid connections. Furthermore, FRP pipes expand to a certain extent in high-temperature environments, making them prone to breakage and affecting their use. Utility Model Content

[0003] The purpose of this invention is to provide a quick-connect sealing connector for small-diameter fiberglass pipes, which solves the problems of time-consuming, labor-intensive, and inefficient connection of existing fiberglass pipes. At the same time, the sealing ring can adapt to the deformation of the fiberglass pipe while ensuring the sealing performance.

[0004] The above-mentioned technical objective of this utility model is achieved through the following technical solution:

[0005] A quick-connect sealing connector for small-diameter fiberglass pipes includes an outer base sleeve and a sealing ring fixed inside the outer base sleeve;

[0006] The inner wall of the sealing ring is formed with a limiting protrusion and two sets of reverse tooth sealing rings symmetrically arranged about the limiting protrusion.

[0007] Insert one end of each of the two fiberglass tubes to be connected into the two ends of this quick-connect sealing element. The sealing ring enhances the sealing performance between the sealing ring and the fiberglass tubes, while the outer base sleeve supports the sealing ring, increasing the overall strength of the quick-connect sealing element. Simultaneously, the sealing ring's reverse tooth shape effectively prevents the fiberglass tubes from moving backward and detaching from the connector. The limiting protrusion ring serves to limit and isolate the inserted fiberglass tubes.

[0008] This utility model is further configured such that: the number of sealing rings in each set of reverse tooth sealing rings is not less than two. The more sealing rings there are, the more seals are formed between the sealing rings and the fiberglass pipe, thereby improving the sealing performance; it can operate normally and stably without interface leakage under the working pressure of up to 2.0 MPa.

[0009] The cross-section of the reverse tooth sealing ring is triangular.

[0010] The inverted tooth sealing ring includes an inwardly inclined guide slope and a blocking surface, which are connected by a rounded corner. The guide slope facilitates the insertion of the fiberglass tube. The end face of the inserted fiberglass tube is provided with a groove, and its rounded corner and surrounding parts are inserted into the groove. The interaction between the plane of the blocking surface and the groove prevents the fiberglass tube from moving outward.

[0011] The angle θ between the guide ramp and the blocking surface is less than or equal to 90°.

[0012] The present invention is further configured such that: multiple grooves are formed on the outer wall of the sealing ring; the outer base sleeve is embedded in the grooves.

[0013] By adding grooves, the bonding strength between the outer base sleeve and the sealing ring can be increased, thereby improving the connection stability.

[0014] The present invention is further configured such that the outer base sleeve is a fiberglass pipe;

[0015] The sealing ring is made of EPDM rubber;

[0016] During the production process, fiberglass cloth is wrapped around the sealing ring with resin adhesive, and the wrapping thickness is thinner, which can reduce the weight of the product.

[0017] The present invention is further configured such that the rounded corner of the outer toothed sealing ring is higher than the rounded corner of the inner toothed sealing ring adjacent to it.

[0018] The protrusion height of the limiting protrusion ring is higher than that of the reverse tooth sealing ring.

[0019] With the above technical solution, the inner rounded corner is lower, which facilitates the insertion of the fiberglass pipe and can appropriately reduce the insertion resistance.

[0020] The present invention is further configured such that: a number of circumferentially distributed blind slots are formed on the inner toothed sealing ring. By setting the blind slots, the insertion resistance can be further reduced, and the fiberglass tube can be inserted more easily.

[0021] The outstanding effect of this utility model is:

[0022] Compared with existing technologies, the installation of a toothed sealing ring facilitates the insertion of fiberglass pipes and prevents them from slipping back, thus improving the stability of the connection between the two.

[0023] The insertion of fiberglass pipes can be further facilitated by making the inner sealing ring lower than the outer sealing ring and by setting blind slots on the sealing ring. Attached Figure Description

[0024] Figure 1 This is a half-sectional view of the present invention;

[0025] Figure 2 for Figure 1 A magnified view of a specific area (A);

[0026] Figure 3 This is a cross-sectional view of the sealing ring of this utility model;

[0027] Figure 4 This is a schematic diagram showing the connection between the present invention and the fiberglass pipe.

[0028] Reference numerals: 10, outer base sleeve; 101,

[0029] 20. Sealing ring; 201. Limiting protrusion ring; 202. Reverse tooth sealing ring; 203. Groove; 204. Blind slot hole;

[0030] 2021, Guide slope; 2022, Blocking surface; 2023, Rounded corner;

[0031] 90. Fiberglass pipes. Detailed Implementation

[0032] The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0033] The following is for reference Figures 1 to 4 The embodiments of this utility model are described below:

[0034] A quick-connect sealing connector for small-diameter fiberglass pipes, such as Figure 1 As shown, it includes an outer base sleeve 10 and a sealing ring 20 fixed inside the outer base sleeve 10;

[0035] The inner wall of the sealing ring 20 is formed with a limiting protrusion ring 201 and two sets of reverse tooth sealing rings 202 symmetrically arranged about the limiting protrusion ring 201.

[0036] like Figure 2 As shown, each set of reverse tooth sealing rings 202 has no less than two sealing rings. The more sealing rings there are, the more seals are formed between the sealing rings and the fiberglass pipe, thereby improving the sealing performance.

[0037] The cross-section of the reverse tooth sealing ring 202 is triangular.

[0038] The inverted tooth sealing ring 202 includes an inwardly inclined guide slope 2021 and a blocking surface 2022, which are connected by a rounded corner 2023. The guide slope facilitates the insertion of the fiberglass tube. The end face of the inserted fiberglass tube is provided with a groove, and its rounded corner and surrounding parts are inserted into the groove. The interaction between the plane of the blocking surface and the groove prevents the fiberglass tube from moving outward.

[0039] The angle θ between the guide ramp 2021 and the blocking surface 2022 is less than or equal to 90°.

[0040] like Figure 2 As shown, the outer wall of the sealing ring 20 has multiple grooves 203 formed therein; the outer base sleeve 10 is embedded in the grooves 203.

[0041] By adding grooves, the bonding strength between the outer base sleeve and the sealing ring can be increased, thereby improving the connection stability.

[0042] In this embodiment, the outer base sleeve 10 is a fiberglass pipe;

[0043] The sealing ring 20 is made of EPDM rubber;

[0044] During the production process, fiberglass cloth is wrapped around the sealing ring with resin adhesive, and the wrapping thickness is thinner, which can reduce the weight of the product.

[0045] like Figure 2 As shown, the rounded corner 2023 of the outer toothed sealing ring 202 is higher than the rounded corner 2023 of the inner toothed sealing ring 202 adjacent to it.

[0046] The protrusion height of the limiting protrusion ring 201 is higher than that of the reverse tooth sealing ring 202.

[0047] The inner rounded corner is lower, which facilitates the insertion of the fiberglass tube and can appropriately reduce the resistance during insertion.

[0048] like Figure 3 As shown, the inner toothed sealing ring 202 has several circumferentially distributed blind slots 204 formed on it. By setting the blind slots, the resistance to insertion can be further reduced, and the fiberglass tube can be inserted more easily.

[0049] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model. These improvements and modifications assumed above should also be considered within the protection scope of the present utility model.

Claims

1. A quick-connect sealing connector for small-diameter fiberglass pipes, characterized in that: Includes an outer base sleeve (10) and a sealing ring (20) fixed inside the outer base sleeve (10); The inner wall of the sealing ring (20) is formed with a limiting protrusion ring (201) and two sets of reverse tooth sealing rings (202) symmetrically arranged about the limiting protrusion ring (201).

2. The quick-connect sealing connector for small-diameter fiberglass pipes according to claim 1, characterized in that: The number of sealing rings in each set of reverse tooth sealing rings (202) shall not be less than two; The cross-section of the reverse tooth sealing ring (202) is triangular.

3. The quick-connect sealing connector for small-diameter fiberglass pipes according to claim 2, characterized in that: The reverse tooth sealing ring (202) includes an inwardly inclined guide slope (2021) and a blocking surface (2022), and the guide slope (2021) and the blocking surface (2022) are transitioned by a rounded corner (2023); The angle θ between the guide ramp (2021) and the blocking surface (2022) is less than or equal to 90°.

4. The quick-connect sealing connector for small-diameter fiberglass pipes according to claim 1, characterized in that: The outer wall of the sealing ring (20) has multiple grooves (203); the outer base sleeve (10) is embedded in the grooves (203).

5. A quick-connect sealing connector for small-diameter fiberglass pipes according to claim 1, characterized in that: The outer base sleeve (10) is a fiberglass pipe; The sealing ring (20) is made of EPDM rubber.

6. A quick-connect sealing connector for small-diameter fiberglass pipes according to claim 3, characterized in that: The rounded corner (2023) of the outer toothed sealing ring (202) is higher than the rounded corner (2023) of the inner toothed sealing ring (202) adjacent to it. The protrusion height of the limiting protrusion ring (201) is higher than that of the reverse tooth sealing ring (202).

7. A quick-connect sealing connector for small-diameter fiberglass pipes according to claim 2, characterized in that: The inner toothed sealing ring (202) has several circumferentially distributed blind slots (204).

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