Connector

Abstract

The utility model provides a connector, and belongs to the technical field of gas accessories. The gas joint solves the problem that an existing gas joint is easy to disassemble arbitrarily. The connector comprises a cylindrical first connecting piece and a cylindrical second connecting piece, external threads are arranged on the outer side of one end of the first connecting piece, an annular protruding shoulder protruding inwards is arranged on the inner side of the other end of the first connecting piece, one end of the second connecting piece is connected into the other end of the first connecting piece in a threaded mode, and an annular protruding blocking shoulder is arranged on the inner side of the end of the second connecting piece. An annular clamping ring is axially limited between the blocking shoulder and the protruding shoulder, a first flat square part is arranged on the outer side of the first connecting piece, a second flat square part is arranged on the outer side of the second connecting piece, a cylindrical shell made of metal materials is axially fixed to the outer side of the second connecting piece, and the first flat square part and the second flat square part are both located in the shell. A gap for a pipe fitting to stretch into is formed between the inner side of the end, facing the first connecting piece, of the shell and the outer side of the first connecting piece. The joint has the advantage of high use safety.

Description

TECHNICAL FIELD

[0001] The utility model belongs to gas fitting technical field relates to a joint. BACKGROUND

[0002] Natural gas is indispensable fuel for cooking food in people's daily life, which is convenient for people's life and beneficial to environmental protection. Meanwhile, the main components of natural gas are carbon monoxide, hydrogen, methane and ethane, which have strong flammability and toxicity, and slight leakage may cause major safety accidents, so the safety requirement for its transportation and use is higher.

[0003] When the existing natural gas enters the house, it often passes through the gas entry pipeline and the gas meter in turn and is connected with one end of a metal bellows, and the other end of the metal bellows is introduced into the room and connected with the gas stove.

[0004] The existing gas meter and metal bellows are often connected by a joint, which is simple and reliable, but it is not convenient to disassemble, which is not conducive to the use and management of natural gas, and gives the opportunity to those who unauthorizedly disassemble gas equipment, change gas pipeline and steal gas, and there is a certain safety hazard after disassembly. UTILITY MODEL CONTENT

[0005] The utility model aims at the above problems existing in the prior art, and provides a joint, which solves the problem that the existing gas joint is easily unauthorizedly disassembled.

[0006] The utility model can be realized by the following technical scheme:

[0007] A joint, comprising a connecting piece one and a connecting piece two, both of which are cylindrical, one end of the connecting piece one has external threads on the outside, and the other end has a shoulder that protrudes inward in a ring shape on the inside, one end of the connecting piece two is threadedly connected to the other end of the connecting piece one, characterized in that the inside of the end of the connecting piece two has a shoulder that protrudes in a ring shape, a clasp ring that is annular and is used for axial fixation with the bellows is axially limited between the shoulder and the protruding shoulder, the outside of the connecting piece one has a flat square part one for tool clamping, the outside of the connecting piece two has a flat square part two for tool clamping, a cylindrical shell made of metal material is axially fixed to the outside of the connecting piece two, the flat square part one and the flat square part two are both located in the shell, and the inside of one end of the shell towards the connecting piece one has a gap between the outside of the connecting piece one for pipe insertion.

[0008] The joint is used for connecting a gas meter and a corrugated pipe, a first connecting piece is screwed with a pipe fitting at the gas meter, a snap ring is arranged at one end of a second connecting piece facing the first connecting piece, the snap ring is clamped into a valley between two crests outside the corrugated pipe to axially fix the snap ring and the corrugated pipe, one end of the second connecting piece is screwed into the other end of the first connecting piece, and the snap ring is axially limited between a shoulder and a stop shoulder to realize the connection between the corrugated pipe and the pipe fitting of the gas meter.

[0009] In the joint, the first connecting piece and the second connecting piece are both cylindrical, and are not easy to rotate, so flat sides are arranged outside the first connecting piece and the second connecting piece respectively to be stably clamped by a tool, the flat sides are flat structures, and can be parallel planes arranged on opposite sides of the first connecting piece and the second connecting piece, and the cross section of the flat sides is generally hexagonal or octagonal, that is, commonly known as hexagonal or octagonal. The cylindrical shell made of metal material and axially fixed outside the second connecting piece has a certain strength and plays a certain anti-tampering role. The shell blocks the flat sides, so that the shell cannot be rotated and disassembled through the flat sides without being disassembled, and the user can be effectively prevented from disassembling the gas joint, and the safety is improved.

[0010] In the joint, a gasket in the shape of a ring is arranged between the end of the second connecting piece and the shoulder. When the second connecting piece is screwed, the end of the second connecting piece can tightly press the gasket on the shoulder, so that the first connecting piece and the second connecting piece are sealed.

[0011] In the joint, the inner side of the second connecting piece has a concave annular sealing groove, and a sealing ring in the shape of a ring is arranged in the sealing groove, the inner side of the sealing ring has a convex annular sealing part, and the sealing part extends out of the sealing groove. The outer side of the existing corrugated pipe for gas is tightly covered with a layer of yellow jacket, and the sealing part of the sealing ring is used to abut against the outer side of the jacket outside the corrugated pipe to form a seal.

[0012] In the joint, the outer side of the second connecting piece has a concave annular clamping groove one, the inner side of the shell corresponds to have a concave annular clamping groove two, and a clamping spring is arranged in the clamping groove one and the outer side of the clamping spring extends into the clamping groove two. The clamping spring in the shape of a ring with a notch is used to axially fix the shell and the second connecting piece, the shell can be installed after the connection of the second connecting piece and the first connecting piece is completed, and the connection between the second connecting piece and the first connecting piece is facilitated.

[0013] In the joint, the other end of the connecting piece two is provided with a tapered guide surface between the end and the clamping groove one, and the diameter of the guide surface gradually decreases from the clamping groove one to the other end of the connecting piece two. Through the provision of the guide surface, the clamping spring is facilitated to slide along the guide surface to the clamping groove one, thereby facilitating installation.

[0014] Compared with the prior art, the joint has a cylindrical shell made of metal material on the outer side, which blocks the flat square part one and the flat square part two, so that the shell cannot be disassembled by rotating the connecting piece one and the connecting piece two through the flat square part one and the flat square part two without being disassembled, thereby effectively preventing the user from disassembling the gas joint by himself and improving the safety in use. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a half-sectional structure schematic view of the joint.

[0016] Figure 2 is a half-sectional structure schematic view of the joint after removing the shell and the clamping spring.

[0017] In the figure, 1 is the connecting piece one; 11 is the shoulder; 12 is the flat square part one; 2 is the connecting piece two; 21 is the shoulder; 22 is the flat square part two; 23 is the sealing groove; 24 is the clamping groove one; 25 is the guide surface; 3 is the clamping ring; 4 is the shell; 41 is the clamping groove two; 5 is the gap; 6 is the gasket; 7 is the sealing ring; 71 is the sealing part; and 8 is the clamping spring. DETAILED DESCRIPTION

[0018] The following is a specific embodiment of the present application combined with the drawings, which further describes the technical scheme of the present application, but the present application is not limited to these embodiments.

[0019] For convenience of description, the specific structure is described below in the direction shown in the drawings.

[0020] As shown in Figure 1 and Figure 2 , the joint comprises the connecting piece one 1, the connecting piece two 2 and the shell 4, all of which are cylindrical. The left end of the connecting piece one 1 has external threads, the right end of the connecting piece one 1 expands outward, and a shoulder 11 in the form of a circular ring is formed at the transition on the inner side, and the right end of the connecting piece one 1 has internal threads. The left end of the connecting piece two 2 is threadedly connected to the right end of the connecting piece one 1, and a gasket 6 in the form of a circular ring is arranged between the left end of the connecting piece two 2 and the shoulder 11, and when the connecting piece two 2 is screwed, the left end of the connecting piece two 2 can press the gasket 6 against the shoulder 11 to form a seal between the connecting piece one 1 and the connecting piece two 2.

[0021] The inner side of the left end of the connecting piece two 2 has a protruding annular shoulder 21, and an annular snap ring 3 is arranged between the shoulder 21 and the gasket 6, and the snap ring 3 is axially limited between the gasket 6 and the shoulder 21. In the embodiment, the snap ring 3 is composed of two oppositely arranged half rings, and the inner side of the left end of each half ring has an inwardly protruding clamping part for clamping into the valley of the corrugated pipe.

[0022] The outer side of the right end of the connecting piece one 1 has a flat square part one 12 for tool clamping, the outer side of the connecting piece two 2 has a protruding annular flat square part two 22 for tool clamping, the outer shell 4 is made of metal material and covers the outer side of the flat square part one 12 and the flat square part two 22, and the outer shell 4 is axially fixed with the connecting piece two 2. In the embodiment, the outer side profile of the cross section of the flat square part one 12 and the flat square part two 22 is substantially hexagonal or octagonal, that is, commonly known as hexagonal or octagonal, the outer shell 4 is made of iron, and the left end of the outer shell 4 has a gap 5 between the inner side of the left end and the outer side of the connecting piece one 1 for the pipe to extend into; the outer side of the right end of the connecting piece two 2 has a recessed annular clamping groove one 24, and the inner side of the right end of the outer shell 4 correspondingly has an annular clamping groove two 41, an annular snap spring 8 with a notch is arranged in the clamping groove one 24, and the outer side of the snap spring 8 extends into the clamping groove two 41. Here, only one snap spring 8 can be arranged, or a limiting buckle in the form of an annular ring with a notch can be additionally arranged to improve the connection strength, and the limiting buckle is also clamped into the clamping groove one 24 and the clamping groove two 41.

[0023] In order to facilitate the installation of the outer shell 4 and the snap spring 8 on the outer side of the connecting piece two 2, the end portion of the clamping groove one 24 is arranged close to the right end of the connecting piece two 2, and the outer side of the right end of the connecting piece two 2 has a tapered guide surface 25 between the end portion and the clamping groove one 24, and the diameter of the guide surface 25 gradually decreases from left to right.

[0024] The inner side of the connecting piece two 2 has a recessed annular sealing groove 23, and an annular sealing ring 7 is arranged in the sealing groove 23, the inner side of the sealing ring 7 has an annular sealing part 71 protruding inwardly and extending out of the sealing groove 23. In the embodiment, the position of the sealing groove 23 is opposite to the position of the protruding flat square part two 22 on the outer side of the connecting piece two 2, so as to ensure the strength of the connecting piece two 2 itself, and the cross section of one side of the sealing ring 7 is in the form of T.

[0025] The joint is used for connecting the gas meter and the corrugated pipe. The outer thread of the left end of the connecting piece 1 is connected with the pipe thread of the gas meter, the corrugated pipe is inserted into the inner hole of the connecting piece 2 from right to left, the sealing part 71 of the sealing ring 7 is abutted on the outer sleeve of the corrugated pipe to form a seal, the clamping ring 3 is buckled on the outer side of the end of the corrugated pipe to realize the axial fixation of the two, the gasket 6 is placed in the connecting piece 1, the connecting piece 2 and the clamping ring 3 are inserted into the right end of the connecting piece 1, and the connecting piece 2 is screwed until the left end of the connecting piece 2 presses the gasket 6, so that the joint and the pipe are connected in a sealed manner.

[0026] After the clamping spring 8 is clamped in the clamping groove two 41 of the shell 4, the shell 4 is sleeved on the outer side of the connecting piece 2 from right to left, the clamping spring 8 is gradually deformed and enlarged by the gradually increasing diameter of the guide surface 25, until the clamping spring 8 moves to the clamping groove one 24, the clamping spring 8 made of metal material is reset under the action of its own elastic force and clamped in the clamping groove one 24, so that the axial fixation of the connecting piece 2 and the shell 4 is realized. The shell 4 completely covers the flat square part one 12 and the flat square part two 22, and the outer sides of the connecting piece one 1 and the connecting piece two 2 are circular except the flat square part one 12 and the flat square part two 22, so that the shell 4 cannot be rotated and disassembled by the flat square part one and the flat square part two without being disassembled, the user can be effectively prevented from disassembling the gas joint, and the safety of use is improved.

[0027] The specific embodiments described herein are merely illustrative of the spirit of the present application. Those skilled in the art of the present application can make various modifications or supplements to the described specific embodiments or use similar ways to replace, but will not deviate from the spirit of the present application or exceed the scope defined by the appended claims.

Claims

1. A connector comprising a first connector (1) and a second connector (2), both cylindrical in shape, wherein one end of the first connector (1) has an external thread on its outer side, and the other end has an inwardly protruding annular shoulder (11) on its inner side, and one end of the second connector (2) is threaded into the other end of the first connector (1), characterized in that, The inner side of one end of the connecting piece two (2) has a protruding annular shoulder (21), the shoulder (21) and the shoulder (11) are axially limited by a ring-shaped snap ring (3) for axial fixation with the corrugated pipe, the outer side of the connecting piece one (1) has a flat square one (12) for tool clamping, the outer side of the connecting piece two (2) has a flat square two (22) for tool clamping, the outer side of the connecting piece two (2) is axially fixed with a cylindrical shell (4) made of metal material, the flat square one (12) and the flat square two (22) are located in the shell (4), the shell (4) has a gap (5) for the pipe to extend into between the inner side of one end of the connecting piece one (1) and the outer side of the connecting piece one (1).

2. A fitting according to claim 1, wherein A circular ring-shaped gasket (6) is arranged between the end of the connecting piece two (2) and the shoulder (11).

3. A joint according to claim 1 or 2, characterised in that The inner side of the connecting piece two (2) has a recessed annular sealing groove (23), the sealing groove (23) is provided with an annular sealing ring (7), the inner side of the sealing ring (7) has a protruding annular sealing part (71) and the sealing part (71) extends out of the sealing groove (23).

4. A joint according to claim 1 or 2, characterised in that The outer side of the connecting piece two (2) has a recessed circular ring-shaped clamping groove one (24), the inner side of the shell (4) corresponds to a circular ring-shaped clamping groove two (41), the clamping groove one (24) is provided with a clamping spring (8) and the outer side of the clamping spring (8) extends into the clamping groove two (41).

5. A fitting according to claim 4, wherein The clamping groove one (24) is opened near the other end of the connecting piece two (2), the outer side of the other end of the connecting piece two (2) has a tapered guide surface (25) between the end and the clamping groove one (24), the diameter of the guide surface (25) gradually decreases from the clamping groove one (24) to the other end of the connecting piece two (2).

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