QUICK CONNECTOR FOR PLASTIC PIPE

Abstract

A quick connector for plastic pipe includes a pipe-shaped body and a quick-connect structure. The quick-connect structure includes a mounting pipe and a sealing ring. A gasket, a circlip and a covering ring are sequentially disposed in the mounting pipe. The sealing ring is pressed to be fixed between the pipe-shaped body and the gasket, the covering ring is fixedly disposed in the mounting pipe. A stopping ring coaxially extends on an inner side of the covering ring. The stopping ring is sleeved on an unlocking cylinder such that the unlocking cylinder is slidable relative to the stopping ring. An abutting ring coaxially extends on an outer wall of the unlocking cylinder with a chamfer being disposed at one end of the abutting ring facing the pipe-shaped body, and a pushing ring extends coaxially on the outer wall of the unlocking cylinder at one end outside the mounting pipe.

Claims

1. A quick connector for a plastic pipe, the quick connector comprising a pipe-shaped body, wherein: a quick-connect structure is disposed at at least one end of the pipe-shaped body in an axis direction, the quick-connect structure comprises a mounting pipe integrally formed with the pipe-shaped body, and a sealing ring, a gasket, a circlip and a covering ring sequentially disposed in the mounting pipe, the sealing ring is pressed to be fixed between the pipe-shaped body and the gasket, the covering ring is fixedly disposed in the mounting pipe, a stopping ring coaxially extends on an inner side of the covering ring, the stopping ring is sleeved on an unlocking cylinder such that the unlocking cylinder is slidable relative to the stopping ring, an abutting ring coaxially extends on an outer wall of the unlocking cylinder with a chamfer being disposed at one end of the abutting ring facing the pipe-shaped body, and a pushing ring extends coaxially on the outer wall of the unlocking cylinder at one end of the unlocking cylinder that is outside the mounting pipe.

2. The quick connector for the plastic pipe according to claim 1, wherein: a stepped ring which abuts against the gasket coaxially extends on an inner wall of the mounting pipe at one end thereof close to the pipe-shaped body, the inner wall of the mounting pipe has an engaging slot located at one end of the mounting pipe that is far away from the pipe-shaped body, and a limit ring engaging with the engaging slot is disposed on an outer periphery of the covering ring with a chamfer disposed at one end of the limit ring facing the pipe-shaped body.

3. The quick connector for the plastic pipe according to claim 2, wherein a chamfer is disposed on an inside of the end of the mounting pipe that is far away from the pipe-shaped body.

4. The quick connector for the plastic pipe according to claim 2, wherein the limit ring comprises limit strips spaced apart in a circumferential direction, and force-reducing grooves are formed between the limit strips.

5. The quick connector for the plastic pipe according to claim 2, wherein a diameter of the sealing ring is greater than a length of the stepped ring in the axis direction.

6. The quick connector for the plastic pipe according to claim 1, wherein an arc chamfer is disposed on an outside of the unlocking cylinder at one end thereof close to the circlip.

7. The quick connector for the plastic pipe according to claim 1, wherein a chamfer is disposed on an inside of the unlocking cylinder at one end thereof that is far away from the mounting pipe.

8. The quick connector for the plastic pipe according to claim 1, wherein a positioning ring extends coaxially on an inside of the pipe-shaped body.

9. The quick connector for the plastic pipe according to claim 1, wherein the quick-connect structures are disposed on both ends of the pipe-shaped body in the axis direction, and the pipe-shaped body is bent.

10. The quick connector for the plastic pipe according to claim 1, wherein a fixing ring extends coaxially on an outside of the covering ring with a chamfer being disposed at one end of the fixing ring facing the mounting pipe, the covering ring is embedded in the mounting pipe, the fixing ring abuts against the mounting pipe, and the fixing ring and the mounting pipe are fixed to each other by welding.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0035] FIG. 1 is an exploded schematic diagram of Embodiment One;

[0036] FIG. 2 is a half sectional view of Embodiment One;

[0037] FIG. 3 is a half sectional view of a double-end quick-connect structure of Embodiment One;

[0038] FIG. 4 is a half sectional view of a bent pipe structure of Embodiment One;

[0039] FIG. 5 is an exploded schematic diagram of Embodiment Two; and

[0040] FIG. 6 is a half sectional view of Embodiment Two.

DESCRIPTION OF THE EMBODIMENTS

[0041] This application is described in detail below in combination with the drawings.

[0042] As shown in FIG. 1 to FIG. 4, a quick connector for a plastic pipe is made of plastic. The quick connector includes a pipe-shaped body 1, which may be straight, bent and so on, and a quick-connect structure is disposed at one or both ends of the pipe-shaped body 1 for quick disassembly and assembly of a pipe. The quick-connect structure includes a mounting pipe 2 coaxially and integrally formed with the pipe-shaped body 1, and an inner diameter of the mounting pipe 2 is larger than that of the pipe-shaped body 1. A sealing ring 3, a gasket 4, a circlip 5 and a covering ring 6 are sequentially mounted in the mounting pipe 2. The covering ring 6 is fixed in the mounting pipe 2, and the covering ring 6 is sleeved on an unlocking cylinder 7 such that the unlocking cylinder 7 is slidable relative to the covering ring 6.

[0043] A stepped ring 21 coaxially extends from one end of the mounting pipe 2 that is close to the pipe-shaped body 1, the sealing ring 3 is embedded with the stepped ring 21, and a diameter of the sealing ring 3 is greater than a length of the stepped ring 21 in its axis direction. When the quick-connect structure is assembled, the stepped ring 21 abuts against and supports the gasket 4, so as to ensure that the gasket 4 supports the circlip 5, and the gasket 4 presses against the sealing ring 3, so as to ensure that the sealing ring 3 is pressed to be fixed in the mounting pipe 2. When the pipe-shaped body 1 receives the pipe, the sealing ring 3 is pressed stably outside the pipe so as to improve the sealing between the sealing ring 3 and the pipe.

[0044] In addition, a fixing ring 63 extends coaxially on an outer periphery of the covering ring 6 at an end that is far away from the mounting pipe 2 with a chamfer being disposed at one end of the fixing ring 63 facing the mounting pipe 2. When the covering ring 6 is fixed to the mounting pipe 2, the covering ring 6 is partially embedded in the mounting pipe 2 until the fixing ring 63 abuts against the mounting pipe 2, and then the fixing ring 63 and the mounting pipe 2 are fixed to each other by welding, so as to achieve the fixed connection between the covering ring 6 and the mounting pipe 2.

[0045] A stopping ring 61 coaxially extends on an inner side of the covering ring 6 at one end that is far away from the circlip 5. An abutting ring 71 extends coaxially on an outer side of the unlocking cylinder 7 with a chamfer being disposed at one end of the abutting ring 71 facing the pipe-shaped body 1, and at the same time, a pushing ring 72 extends coaxially on the outer side of the unlocking cylinder 7 at one end that is away from the pipe-shaped body 1 and that is outside the mounting pipe 2. When the unlocking cylinder 7 is mounted, the pushing ring 72 is pushed such that the abutting ring 71 presses against the stopping ring 61, and the unlocking cylinder 7 is embedded in the covering ring 6 under the pressing force acting on the unlocking cylinder 7 as the plastic material has good elastic deformation ability within a certain range and the guidance of the chamfer of the abutting ring 71. When the unlocking cylinder 7 is pulled out of the covering ring 6, the stopping ring 61 stops the abutting ring 71, thereby achieving stable mounting of the unlocking cylinder 7 in the covering ring 6, and the pushing ring 72 of the unlocking cylinder 7 located outside the covering ring 6 facilitates pushing of the unlocking cylinder 7 during the subsequent disassembly of the pipe by hand so as to facilitate the disassembly of the pipe.

[0046] In addition, an arc chamfer 73 is disposed on the outside of the unlocking cylinder 7 at one end thereof close to the circlip 5, and a length of an arc of the arc chamfer 73 corresponds to an angle of 90. When the pipe needs to be disassembled, the unlocking cylinder 7 is pressed to slide toward the covering ring 6. First, the arc chamfer 73 of the unlocking cylinder 7 abuts against the circlip 5, and the circlip 5 is gradually bent and opened as the unlocking cylinder 7 gradually slides into the covering ring 6 until the circlip 5 is bent to abut against the abutting ring 71. At the same time, the circlip 5 is separated from the arc chamfer 73 of the unlocking cylinder 7, such that a force arm for pushing the circlip 5 to rotate by the unlocking cylinder 7 is instantly reduced, and then force required for pushing the unlocking cylinder 7 is suddenly increased, that is, a person pushing the unlocking cylinder 7 knows that the pushing of the unlocking cylinder 7 is completed by a sudden change in the force acting on the hand, thereby avoiding excessive pushing of the unlocking cylinder 7 which ensures a service life of the circlip 5.

[0047] A chamfer is disposed on the inside of the unlocking cylinder 7 at one end thereof that is far away from the pipe-shaped body 1. A positioning ring 11 extends coaxially in an inner wall of the pipe-shaped body 1 and is located on one side of the sealing ring 3 that is far away from the gasket 4. When the pipe 2 is assembled, the pipe is inserted into the unlocking cylinder 7, and the chamfer of the unlocking cylinder 7 facilitates guiding an axis of the pipe to coincide with an axis of the unlocking cylinder 7, so as to facilitate the insertion of the pipe until the pipe is inserted to abut against the positioning ring 11 which determines the insertion depth of the pipe, thereby ensuring the stability of the connection between the pipe and the pipe-shaped body 1.

[0048] The implementation principle of this embodiment is as follows. When the pipe 2 is assembled, the pipe is inserted into the unlocking cylinder 7 until it abuts against the positioning ring 11, so as to ensure the sealing between the pipe and the pipe-shaped body 1. When the pipe is disassembled, the pushing ring 72 is manually pushed until the circlip 5 presses against the abutting ring 71, the force required for pushing the unlocking cylinder 7 is suddenly increased, and then the pipe is pulled out of the unlocking cylinder 7, thereby ensuring the smooth disassembly of the pipe.

[0049] Differences Between Embodiment Two and Embodiment One are as Follows

[0050] As shown in FIG. 5 and FIG. 6, the mounting pipe 2 has an engaging slot 22 disposed on the inside of the mounting pipe 2 at one end that is far away from the pipe-shaped body 1. A limit ring 62 coaxially extends on the outside of the covering ring 6 at one end that is far away from the circlip 5 with a chamfer disposed at one end of the limit ring 62 facing the pipe-shaped body 1, such that the cross section of the limit ring 62 assumes a right triangle in the plane of its axis. A chamfer is disposed on the inside of the mounting pipe 2 at one end that is far away from the pipe-shaped body 1. When the covering ring 6 is mounted, as the plastic material has good elastic deformation ability within a certain range, the covering ring 6 is directly pressed to move toward the mounting pipe 2, the chamfer of the mounting pipe 2 facilitates guiding an axis of the covering ring 6 to coincide with an axis of the mounting pipe 2, and the chamfer of the limit ring 62 guides the covering ring 6 to be embedded into the mounting pipe 2, thereby achieving the stable mounting of the mounting pipe 2. The limit ring 62 includes limit strips 621 spaced apart in a circumferential direction, and force-reducing grooves are formed between the limit strips 621 and reduce the area of resistance acting on the covering ring 6 when the covering ring 6 is mounted in the mounting pipe 2, thereby facilitating the mounting of the covering ring 6.

[0051] What is provided above is merely some preferred embodiments of this application. The scope of this application is not limited by the above embodiments, but should include all technical solutions under the thinking of this application. It is to be noted that, some improvements and modifications can be made by those skilled in the art without departing from the principle of this application, and should be considered to fall within the scope of this application.