Anti-loosening loose joint pipe fitting

Abstract

The utility model discloses an anti-loosening loose joint pipe fitting which comprises a plastic three-way pipe fitting, the plastic three-way pipe fitting comprises a straight pipe body and a branch pipe body, plastic supporting rings are arranged at the two ends of the straight pipe body, nuts are arranged outside the plastic supporting rings in a sleeved mode, a set of plastic buckle rings are evenly arranged on the end face of each nut, and installation grooves are formed in the matching positions of the end face of each nut and the corresponding plastic buckle rings. An auxiliary elastic taper structure is arranged at one end of the plastic buckle ring, the plastic buckle ring is inserted into the installation groove in an interference fit mode to form an inverted triangle structure, equally-divided reinforcing ribs are arranged on the surface of the plastic three-way pipe fitting, buckle structures are arranged at the two ends of the equally-divided reinforcing ribs, and the other end of the plastic buckle ring is clamped into the buckle structures. Due to the fact that the plastic has elasticity, the plastic buckle ring at the nut end can be adjusted through external force and clamped into the buckle structure of the reinforcing rib of the plastic pipe fitting, the positioning and fixing effects are achieved, and the problem of water leakage caused by looseness of the nut is solved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of plastic pipeline water supply system, concretely relates to a loosening-preventing movable joint pipe fitting. BACKGROUND

[0002] In the plastic pipeline water supply system, often encounter vibration and thermal expansion phenomenon, bring tiny vibration amplitude and tiny relative displacement, with the lapse of time, further aggravate the tendency of thread loosening, cause the leakage phenomenon. UTILITY MODEL CONTENTS

[0003] In view of the problems existing in the prior art, the purpose of the utility model is to provide a loosening-preventing movable joint pipe fitting that effectively prevents leakage.

[0004] To achieve the above-mentioned purpose, the technical scheme of the utility model is as follows:

[0005] A loosening-preventing movable joint pipe fitting, comprising a plastic tee pipe fitting, the plastic tee pipe fitting comprising a straight pipe body and a branch pipe body, characterized in that the straight pipe body is provided with a plastic support ring at both ends, a nut is provided outside the plastic support ring, a group of plastic buckle rings are uniformly arranged on the end face of the nut, an installation groove is formed on the cooperation position of the end face of the nut and the plastic buckle ring, an auxiliary elastic taper structure is arranged at one end of the plastic buckle ring, the plastic buckle ring is inserted into the installation groove in interference fit, forming an inverted triangular structure, the surface of the plastic tee pipe fitting is provided with an equal division reinforcing rib, the equal division reinforcing rib is provided with a buckle structure at both ends, and the other end of the plastic buckle ring is clamped into the buckle structure.

[0006] Further, the installation groove is a dovetail trapezoidal groove, the mouth end is relatively narrow, then gradually expands inward, and becomes larger at the other end.

[0007] Further, the end of the plastic buckle ring cooperating with the buckle structure is an arc head, the arc head is clamped into the buckle structure by external force adjustment, forming the positioning and fixed effect.

[0008] Further, the number of the plastic buckle rings is four.

[0009] Further, the port of the plastic support ring at one end of the straight pipe body is a water inlet port, the port of the other plastic support ring is a water outlet port, the port of the branch pipe body is a connecting port, and the water inlet port, the straight pipe body, the water outlet port and the branch pipe body are in communication.

[0010] Compared with the prior art, the utility model has the beneficial effects as follows:

[0011] 1) The surface of the plastic tee fitting of this utility model is provided with equally divided reinforcing ribs, and the two ends of the equally divided reinforcing ribs are provided with snap-fit ​​structures. The other end of the plastic snap-fit ​​ring is snapped into the snap-fit ​​structure. When the nut is tightened to the pre-tightening force marked on the fitting, due to the elasticity of the plastic itself, the plastic snap-fit ​​ring at the nut end can be adjusted by external force and snapped into the snap-fit ​​structure on the reinforcing rib of the plastic fitting, forming a positioning and fixing function, and ensuring that the nut does not leak due to loosening.

[0012] 2) This utility model provides a set of plastic snap rings evenly on the end face of the nut. An installation groove is provided at the mating point between the end face of the nut and the plastic snap ring. One end of the plastic snap ring is provided with an auxiliary elastic tapered structure. The plastic snap ring is inserted into the installation groove with an interference fit to form an inverted triangular structure, which strengthens the fastening between the two and enables it to withstand the pull-out force caused by displacement of the nut joint.

[0013] 3) The mounting groove of this utility model is a dovetail trapezoidal groove, which is narrow at one end and gradually expands inward until it becomes larger at the other end, thereby increasing the contact area of ​​the connecting surface and thus improving the connection strength.

[0014] 4) The pipe fitting of this utility model has a reasonable structural design, good waterproof performance, and simple operation. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the pipe fitting of this utility model;

[0016] Figure 2 This is a schematic diagram of the overall structure of the nut of this utility model;

[0017] Figure 3 Cross-sectional view of the nut of this utility model Figure 1 ;

[0018] Figure 4 for Figure 3 Enlarged detail image of point A in the middle;

[0019] Figure 5 Cross-sectional view of the nut of this utility model Figure 2 ;

[0020] Figure 6 for Figure 5 Enlarged detail image at point B in the middle;

[0021] Figure 7 This is a schematic diagram of a partial structure of the pipe fitting;

[0022] Figure 8 for Figure 7 Enlarged detail of point A in the middle.

[0023] In the diagram: 1. Nut; 2. Plastic tee fitting; 3. Plastic support ring; 4. Arc head; 5. Reinforcing rib; 6. Plastic snap ring; 7. Straight pipe body; 8. Branch pipe body; 9. Mounting groove; 10. Auxiliary elastic tapered structure; 11. Snap structure; 12. Inlet; 13. Outlet. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings, but the scope of protection of the present invention is not limited to the scope described herein.

[0025] Please refer to Figure 1 A type of anti-loosening fitting includes a plastic tee fitting 2. The plastic tee fitting 2 includes a straight pipe body 7 and a branch pipe body 8. Both ends of the straight pipe body 7 are provided with plastic support rings 3. The port of the plastic support ring 3 at one end of the straight pipe body 7 is the inlet 12, and the port of the other plastic support ring 3 is the outlet 13. The port of the branch pipe body 8 is the connection port. The inlet 12 is connected to the straight pipe body 7, the outlet 13 and the branch pipe 8.

[0026] Please refer to Figure 2 A nut 1 is fitted over a plastic support ring 3. A set of plastic snap rings 6 are evenly distributed on the end face of the nut 1. An installation groove 9 is provided at the mating point between the end face of the nut 1 and the plastic snap ring 6. An auxiliary elastic tapered structure 10 is provided at one end of the plastic snap ring 6. The plastic snap ring 6 is inserted into the installation groove 9 with an interference fit to form an inverted triangular structure, which strengthens the fastening between the two and enables it to withstand the pull-out force caused by the displacement of the nut joint.

[0027] Please refer to Figures 3-6 Furthermore, the mounting groove 9 is a dovetail trapezoidal groove, narrow at one end and gradually expanding inwards until it becomes larger at the other end. This dovetail trapezoidal groove increases the contact area of ​​the connecting surfaces, thereby improving the connection strength. When the auxiliary elastic tapered structure 10 is inserted into the dovetail trapezoidal groove, it is compressed by the contact surface and can contract inwards at a certain angle, effectively inserting into the dovetail groove. The auxiliary elastic tapered structure 10 rebounds and returns to its original position, locking itself within the groove, forming an effective fixation.

[0028] Please refer to Figures 7-8 The plastic tee fitting 2 has equally spaced reinforcing ribs 5 on its surface, and each of the equally spaced reinforcing ribs 5 has a snap-fit ​​structure 11 at both ends. The other end of the plastic snap-fit ​​ring 6 is snapped into the snap-fit ​​structure 11. Furthermore, the end of the plastic snap-fit ​​ring 6 that mates with the snap-fit ​​structure 11 is an arc-shaped head 4, which is adjusted and snapped into the snap-fit ​​structure 11 by external force to form a positioning and fixing function.

[0029] When nut 1 is tightened to the pre-tightening force indicated on the pipe fitting, due to the elasticity of the plastic itself, the fixing pin at the end of the nut can be adjusted by external force and snapped into the buckle structure 11 on the reinforcing rib of the plastic pipe fitting, forming a positioning and fixing function to ensure that the nut does not leak due to loosening.

[0030] In this embodiment, there are 4 out of 6 plastic buckle rings.

Claims

1. A non-loosening connecting pipe fitting, characterized in that... The device includes a plastic tee fitting (2), which includes a straight pipe body (7) and a branch pipe body (8). The straight pipe body (7) is characterized by having plastic support rings (3) at both ends. A nut (1) is provided on the outer sleeve of the plastic support ring (3). A set of plastic snap rings (6) are evenly provided on the end face of the nut (1). An installation groove (9) is provided at the mating point between the end face of the nut (1) and the plastic snap ring (6). An auxiliary elastic tapered structure (10) is provided at one end of the plastic snap ring (6). The plastic snap ring (6) is inserted into the installation groove (9) with an interference fit to form an inverted triangular structure. The surface of the plastic tee fitting (2) is provided with equally divided reinforcing ribs (5). A snap structure (11) is provided at both ends of the equally divided reinforcing ribs (5). The other end of the plastic snap ring (6) is snapped into the snap structure (11).

2. The anti-loosening connector according to claim 1, characterized in that... The mounting groove (9) is a dovetail trapezoidal groove with a narrow opening that gradually expands inward until it becomes larger at the other end.

3. The anti-loosening connector according to claim 1, characterized in that... The end of the plastic buckle ring (6) that engages with the buckle structure (11) is an arc-shaped head (4), wherein the arc-shaped head (4) is adjusted by external force and inserted into the buckle structure (11) to form a positioning and fixing function.

4. A non-loosening connecting pipe fitting according to claim 1 or 3, characterized in that... The number of plastic buckle rings (6) is 4.

5. The anti-loosening connector according to claim 1, characterized in that... The port of the plastic support ring (3) at one end of the straight pipe (7) is the inlet (12), and the port of the other plastic support ring (3) is the outlet (13). The port of the branch pipe (8) is the connection port. The inlet (12) is connected to the straight pipe (7), the outlet (13) and the branch pipe (8).

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