KR20120004807U - The adaptor and the pipe connector using the same - Google Patents

Abstract

The present invention not only facilitates the insertion of flexible pipes (e.g. multilayer pipes), but also through sockets that can ensure the sealing of the sockets and the maintenance of pipe connection when pressure is applied to expand and inject liquid into the pipes. Providing a push fit method for pipe connection, the socket comprising a socket body consisting of a gripping ring, a retainer, and an O-ring in sequence in the direction of insertion of the pipe; When a pipe is inserted into the socket, the flange disposed on the gripping ring is bent; When liquid is injected into the pipe and is pressurized to expand, the third O-ring is compressed to expand axially, and the third O-ring then disengages the retainer, thereby releasing the holding ring. Lock the pipe by sliding it to move in the opposite direction of pipe insertion. The present invention also provides a push fitting socket using the adapter for the supply of liquid.

Description

Adapter and pipe connector using the adapter {THE ADAPTOR AND THE PIPE CONNECTOR USING THE SAME}

The invention relates to a pipe connection device, in particular to an adapter and a push fitting socket using the adapter.

Pipes are one of the important installations used in industry, and pipe connections such as sockets are important devices for connecting pipes.

Well-known pipe connections today include threaded connections (corresponding to metal pipes) and heat welded joints (PP-R pipes and PE pipes). The threaded connection of the pipes is achieved by screwing the two pipes together using the internal thread of one pipe and the external thread of the other pipe and using a Teflon belt for sealing. The joints of the two pipes are melted and the two pipes are connected to each other in a molten state so that the joints form a sealed connection. However, the two connecting means described above are very complicated and the sealing quality is not good, and such connecting means can also cause inconvenience in maintenance. In order to meet other requirements, improved pipe connection schemes and associated devices are expected.

Chinese patent publication CN 2428674Y discloses a pipe socket. This socket is made of metal and is suitable for connecting PEX pipes. The socket includes a socket body, an O-ring, a retainer, a grab ring, a demounting ring, and a cap. The O-ring, retainer, gripping ring, separation ring, and cap are disposed in order within the socket. When the pipe is inserted into the socket, it passes through the separating ring, the gripping ring, the retainer and the O-ring in order, leading to the pipe stop shoulder. Since the teeth of the gripping ring are elastic, the teeth can grip the pipe when the pipe is inserted. Since the O-ring is flexible, the O-ring is used to implement the seal of the system. A cap is used to prevent the members from coming off. To pull the PEX pipe out of the socket, it is necessary to push the separation ring forward to push the teeth of the gripping ring to separate it from the pipe. However, because the pipe is very soft, its walls are very thin, and when the PEX pipe is inserted into the socket, it is not well connected with the socket and the sealing of the entire system is also poor.

Chinese Patent Publication No. CN 20114195Y discloses a pipe socket, comprising a socket body, a sealing member, and a gripping ring, wherein the gripping ring is arranged with a plurality of flexible teeth; The gripping ring is fixed axially in the socket; An adapter is placed in the socket. There is a radial gap between the adapter and the outer wall of the pipe. The invention improves the quality of the connection between the pipe and the socket and the sealing of the system, even though the pipe is soft and its wall is very thin. However, since the outer wall of the adapter is very soft, when the adapter is connected to the pipe and placed in the socket, and then water is injected into the pipe, the strong pressure and water pushing force applied to the inner wall of the pipe will cause the pipe to move relative to the adapter. May result.

Chinese Patent Publication CN 2443220Y discloses a socket assembly and includes an adapter having a flange; The outer diameter of the adapter is equal to the inner diameter of the pipe. An O-ring is arranged for the connection between the adapter and the pipe; The gripping ring is mounted on the outer wall of the adapter. The socket assembly also includes a retainer having an inclined surface that can engage the teeth of the O-ring when the teeth are pushed open. The patent discloses the construction of a socket assembly with an O-ring arranged for connection between the adapter and the pipe, in spite of the large pressure acting on the inner wall of the pipe and the high pushing force of the flowing water. This can prevent the relative movement of the to some extent, thus improving the quality of the connection between the adapter and the pipe.

 Currently, multi-layer pipes with somewhat toxic metals, such as aluminum, are being used to transport more and more water to improve their strength. People often cut multi-layer pipes to get the right length for installation. However, once the multilayer pipe is cut, metals such as aluminum in the PEX pipe may be exposed. Multi-layer pipes are used in drinking water, which can harm people's health if they come into contact with metals that are harmful to health. Therefore, it is forbidden to use this kind of pipe for the transport of drinking water.

The prior art described above can lead to the opportunity for a drinking water to come in contact with a health-hazardous metal exposed from at least one end of the adapter once the multilayer pipe is inserted and the drinking water is injected into the socket. This is because there is no element in the socket that blocks the end of the inserted pipe from the water.

The present invention provides an adapter with an improved sealing effect that can block the end of the inserted pipe from the injected water so that the water passing through the socket does not endanger people's health by contacting the toxic metal at the end of the socket. For the purpose of providing it.

The adapter has an adapter body having an axial passage therein and also including a socket connection for connecting with the socket and a pipe connection for connecting with the pipe; A first O-ring is disposed in the socket connection to form a sealed connection with the inner wall of the socket; A second O-ring is arranged in the pipe connection to form a sealing connection with the inner wall of the pipe.

In the adapter, a first positioning structure is disposed along the circumference of the outer wall of the socket connection portion for positioning the first O-ring; A second positioning structure is arranged along the circumference of the outer wall of the pipe connection for positioning the second O-ring.

In the adapter, the first positioning structure is a first groove disposed along the circumference, and the second positioning structure is a second groove disposed along the circumference; The first O-ring is disposed in the first groove and the second O-ring is disposed in the second groove.

In the adapter, an adapter flange is disposed along the circumference of the outer wall of the socket connection portion, and the first groove is disposed circumferentially on the adapter flange.

In the adapter, the first groove comprises a pipe connection side forming a first wall and a socket connection side forming a second wall; The first wall and the second wall are annular, the diameter of the first wall is larger than the diameter of the second wall, and the first wall has the pipe in the insertion direction. Interact with the socket to prevent it from moving.

A push fitting socket with an adapter, in order in the pipe insertion direction: a pipe locking assembly for locking a pipe inserted in the socket; A third O-ring for forming a sealing connection with the outer wall of the pipe; An O-ring stop shoulder disposed on an inner wall of the socket body to stop the third O-ring from moving in the pipe insertion direction; A socket body composed of a pipe seal; Further comprising an adapter, the adapter having an adapter body having an axial passage therein and also including a socket connection for connecting with the socket and a pipe connection for connecting with the pipe; A first O-ring is disposed in the socket connection to form a seal connection with the inner wall of the socket; A second O-ring is arranged in the pipe connection to form a sealing connection with the inner wall of the pipe.

In the socket, a first positioning structure is disposed along the circumference of the outer wall of the socket connection portion for positioning the first O-ring; A second positioning structure is arranged along the circumference of the outer wall of the pipe connection for positioning the second O-ring.

In the socket, the first positioning structure is a first groove disposed along a circumference, and the second positioning structure is a second groove disposed along the circumference; The first O-ring is disposed in the first groove and the second O-ring is disposed in the second groove.

In the socket, an adapter flange is disposed along the circumference of the outer wall of the socket connection portion, and the first groove is disposed circumferentially on the adapter flange; A pipe stop element is arranged on the inner wall of the socket body to stop the adapter from moving in the pipe insertion direction.

In the socket, the first groove comprises a pipe connection side forming a first wall and a socket connection side forming a second wall; The first wall and the second wall are annular and the diameter of the first wall is larger than the diameter of the second wall; The pipe stop element is a pipe stop shoulder having an annular shape disposed along a circumference; The inner diameter of the pipe stop shoulder is larger than the inner diameter of the second wall but smaller than the inner diameter of the first wall; The first O-ring is in sealing connection with an inner wall of the pipe stop shoulder; The first wall interacts with the pipe stop shoulder to prevent the pipe from moving in the insertion direction.

In the socket, the pipe locking assembly comprises: a cap for preventing the element in the socket from being pulled out; A cap stop member disposed at an end of the socket into which the pipe is inserted to prevent the cap from being pulled out; A demounting ring for unlocking the pipe; A grab ring comprising a gripping ring flange and a plurality of teeth disposed on the gripping ring flange for gripping an outer wall of the pipe; A retainer in movable connection with the inner wall of the socket body to stop the gripping ring from moving in the pipe insertion direction; And a retainer stop shoulder disposed on the inner wall of the socket body to stop the retainer from moving in the pipe insertion direction.

In the socket, the socket body includes an O-ring point disposed between the O-ring stop shoulder and the retainer stop shoulder, and at the end of the O-ring stop shoulder adjacent to the third O-ring. A step in sealing connection with the O-ring point is disposed; The staircase is always in hermetically sealed connection with the O-ring point.

In the socket, the gap between the O-ring stop shoulder and the retainer is no narrower than the axial width of the third O-ring that is compressed when the pipe passes through the third O-ring; In the initial state the inner diameter of the tooth is smaller than the outer diameter of the pipe, the inner diameter of the third O-ring is smaller than the outer diameter of the pipe and the inner diameter of the separating ring is larger than the outer diameter of the pipe; The retainer is annular and includes a ramp that engages the tooth; The socket comprises: a cap stop shoulder disposed on an inner wall of the socket body between the gripping ring and the cap to stop the cap from moving in the pipe insertion direction; A hump disposed on an outer wall of the separation ring to interact with the cap to prevent the separation ring from slipping out of the socket; The separation ring has a sharp angle at an end of the separation ring proximate the gripping ring.

The present invention has the following advantages:

1. A first O-ring is disposed on the socket connection to form a seal connection with the inner wall of the socket; A second O-ring is arranged at the pipe connection to form a sealing connection with the inner wall of the pipe. Adapters with this structure ensure that the liquid (drinking water) flowing from any end of the adapter does not come into contact with the metal exposed at the end of the pipe, thereby preventing people's health from the liquid (drinking water) in contact with the metal at the end of the pipe. It allows you to avoid being threatened. In addition, the first O-ring circumferentially arranged on the outer wall of the adapter not only ensures that the O-ring is always in contact with the inner wall of the socket even if there is some relative movement between the adapter and the inner wall of the socket. Rather, by increasing the friction between the adapter and the inner wall of the socket, the pressure applied to the inner wall of the socket can be increased to improve the binding force of the entire system. In addition, the aforementioned adapter eliminates the need to use other types of pipes that are free of health hazards such as aluminum at the end when transferring drinking water, thereby reducing the cost of having both types of pipes.

2. A first positioning structure is arranged along the circumference of the outer wall of the socket connection portion for positioning the first O-ring; A second positioning structure is arranged along the circumference on the outer wall of the pipe connection for positioning the second O-ring. The adapter with this structure not only does not cause any relative movement between the second O-ring and the adapter so as to ensure the seal quality between the pipe and the adapter, and the first O-ring is always It is held on the outer wall so that no axial relative movement occurs between the first O-ring and the adapter to ensure a seal between the adapter and the inner wall of the socket.

3. The first positioning structure is a first groove disposed along the circumference, and the second positioning structure is a second groove disposed along the circumference; The first O-ring is disposed in the first groove and the second O-ring is disposed in the second groove; The grooves used as the positioning structure are not only easy to form, but also can ensure the sealing quality of the whole system.

4. The adapter flange is arranged along the circumference of the outer wall of the socket connection and the first groove is arranged along the circumference of the adapter flange. An adapter with this structure can prevent the pipe from moving in the pipe insertion direction and also keep the pipe in the correct position to be sealed internally.

5. The first groove comprises a pipe connection side forming a first wall and a socket connection side forming a second wall; The first wall and the second wall are annular, the diameter of the first wall is larger than the diameter of the second wall, and the first wall moves the pipe in the insertion direction. Interact with the socket to prevent it. The adapter having such a structure allows a stepped structure to be formed by O-rings disposed in the first wall, the second wall and the first groove, thereby miniaturizing the pipe stop element disposed on the inner wall of the adapter and the socket ( compactness can be improved.

6. The push fitting socket comprises: a pipe locking assembly for locking the pipe inserted in the socket, in the pipe insertion direction; A third O-ring for forming a sealing connection with the outer wall of the pipe; A socket body composed of a pipe seal; Further comprising an adapter, the adapter having an adapter body having an axial passage therein and also including a socket connection for connecting with the socket and a pipe connection for connecting with the pipe; A first O-ring is disposed in the socket connection to form a seal connection with the inner wall of the socket; A second O-ring is arranged in the pipe connection to form a sealing connection with the inner wall of the pipe. The push fitting socket also includes the adapter described above. A socket with this structure ensures that the liquid (drinking water) flowing from any end of the adapter does not come into contact with the exposed metal at the end of the pipe, thereby preventing people's health from being brought into contact with the metal at the end of the pipe. It allows you to avoid being threatened. In addition, the first O-ring circumferentially arranged on the outer wall of the adapter not only ensures that the O-ring is always in contact with the inner wall of the socket even if there is some relative movement between the adapter and the inner wall of the socket. Rather, by increasing the friction between the adapter and the inner wall of the socket, the pressure applied to the inner wall of the socket can be increased to improve the binding force of the entire system.

7. The socket includes an adapter, and a first positioning structure is arranged along the circumference of the outer wall of the socket connection portion for positioning the first O-ring; A second positioning structure is arranged along the circumference of the outer wall of the pipe connection for positioning the second O-ring. The socket having this structure not only does not cause any relative movement between the second O-ring and the adapter so as to ensure the sealing quality between the pipe and the adapter, and the first O-ring is always It is held on the outer wall so that no axial relative movement occurs between the first O-ring and the adapter to ensure a seal between the adapter and the inner wall of the socket.

8. In the socket, an adapter flange is arranged along the circumference of the outer wall of the socket connection portion, and the first groove is disposed along the circumference of the adapter flange; A pipe stop element is disposed on an inner wall of the socket body to stop the adapter from moving in the pipe insertion direction; The socket having this structure can lock the adapter and the pipe between the pipe stop element and the pipe locking assembly to improve the binding force of the entire system.

9. The socket includes an O-ring stop disposed between the O-ring stop shoulder and the retainer stop shoulder, and at the end of the O-ring stop shoulder adjacent to the third O-ring. A stepped portion in sealing connection with the ring point is disposed; The staircase is always in hermetically sealed connection with the O-ring point. This structure improves the sealing between the third O-ring and the inner wall of the socket, thereby ensuring the sealing of the entire system.

10. If the gap between the O-ring stop shoulder and the retainer is as wide as the axial width of the O-ring that is compressed when the pipe is inserted into the socket, the pressure generated by the third O-ring is not much. Not large, which may facilitate the insertion of the pipe.

11. Since the inner diameter of the teeth in the initial state is smaller than the outer diameter of the pipe, the teeth of the gripping ring can grip the outer wall of the pipe. Since the inner diameter of the O-ring is smaller than the outer diameter of the pipe, the O-ring can form a sealing connection with the outer wall of the pipe, and the inner diameter of the separation ring is larger than the outer diameter of the pipe, so that the separation Sufficient clearance is formed between the ring and the pipe so that the pipe can be inserted without being restrained.

12. The retainer is annular and includes a lamp that engages the teeth. This allows the teeth of the gripping ring to bend when pushed by the pipe into which it is inserted. A separation ring having a sharp angle at the end of the separation ring adjacent to the O-ring ensures minimal contact with the teeth of the gripping ring.

For a better understanding of the foregoing and other aspects of the present invention and their embodiments, reference is made to the following detailed description of the embodiments in conjunction with the following drawings. These figures illustrate various parts of the push fitting socket. It should be understood that various embodiments other than the directly illustrated embodiments may be made to encompass the concepts of the present invention.

1 illustrates an adapter with an adapter flange,
2 illustrates an adapter having a first wall and a second wall,
3 illustrates the adapter of FIG. 1 connected to a pipe in an operational state,
4 illustrates the operating state of the adapter of FIG. 2 connected to a pipe;
5 illustrates a socket without an adapter installed,
6 illustrates a socket having a first wall and a second wall in an operational state.

Example 1

Referring to FIG. 1, the adapter includes an adapter body 101 having an axial passage 102 therein and also including a socket connection 110 for connecting with the socket and a pipe connection 111 for connecting with the pipe. Equipped; An adapter flange 107 is disposed along the circumference of the outer wall of the socket connection part 110.

2, a first O-ring 105 is disposed in the socket connection 110 to form a sealing connection with the inner wall of the socket; A second O-ring 106 is arranged on the pipe connection 111 to form a sealing connection with the inner wall of the pipe.

A first positioning structure is disposed along the circumference of the outer wall of the socket connection portion 110 to position the first O-ring 105; A second positioning structure is arranged along the circumference of the outer wall of the pipe connection 111 to position the second O-ring 106.

The first positioning structure is a first groove 103 disposed circumferentially in the adapter flange 107, and the second positioning structure is disposed circumferentially on an outer wall of the adapter body 101. Second groove 104; The first O-ring 105 is disposed in the first groove 103 and the second O-ring 106 is disposed in the second groove 104.

Adapters with this structure ensure that the liquid (drinking water) flowing from any end of the adapter does not come into contact with the exposed metal at the end of the pipe, thereby preventing people's health It allows you to avoid being threatened. In addition, the first O-ring 105 circumferentially arranged on the outer wall of the adapter ensures that the O-ring is always in contact with the inner wall of the socket even when there is a slight relative movement between the adapter and the inner wall of the socket. In addition to ensuring, increasing the friction between the adapter and the inner wall of the socket can increase the pressure applied to the inner wall of the socket to improve the binding force of the entire system.

The first groove 103 and the second groove 104 will not cause any relative movement between the second O-ring 106 and the adapter to ensure a seal quality between the pipe and the adapter. In addition, there is no axial direction between the first O-ring 105 and the adapter so that the first O-ring 105 is always held on the outer wall of the adapter to ensure a seal between the adapter and the inner wall of the socket. It also ensures that relative movement of

Example 2

Referring to FIG. 3, the adapter includes an adapter body 101 having an axial passage 102 therein and also including a socket connection 110 for connecting with the socket and a pipe connection 111 for connecting with the pipe. Equipped; An adapter flange 107 is disposed along the circumference of the outer wall of the socket connection part 110.

A first O-ring (105) is disposed in the socket connection (110) to form a seal connection with the inner wall of the socket; A second O-ring 106 is arranged on the pipe connection 111 to form a sealing connection with the inner wall of the pipe.

A first positioning structure is disposed along the circumference of the outer wall of the socket connection portion 110 to position the first O-ring 105; A second positioning structure is arranged along the circumference of the outer wall of the pipe connection 111 to position the second O-ring 106.

Referring to FIG. 4, the first positioning structure is a first groove 103 arranged circumferentially in the adapter flange 107, and the second positioning structure is an outer wall of the adapter body 101. Is a second groove 104 disposed along the circumference; The first O-ring 105 is disposed in the first groove 103 and the second O-ring 106 is disposed in the second groove 104.

The first groove (103) comprises a pipe connection (111) side forming a first wall (108) and a socket connection (110) side forming a second wall (109); The first wall 108 and the second wall 109 are annular, the diameter of the first wall 108 is greater than the diameter of the second wall 109, the first wall Wall 108 interacts with the socket to prevent the pipe from moving in the insertion direction.

Example 3

With reference to FIG. 5, the push fitting socket comprises, in order in the pipe insertion direction: a cap 5 for preventing the elements in the socket from falling out; A cap stop member (9) disposed at the end of the socket into which the pipe (13) is inserted to prevent the cap (5) from being pulled out; A separation ring (6) for unlocking the pipe (13); A gripping ring (4) comprising a flange (12) and a plurality of teeth (10) arranged on the flange for gripping the outer wall of the pipe (13); A retainer (3) in movable connection with the inner wall of the socket body (1) to stop the holding ring (4) from moving in the pipe insertion direction; A retainer stop shoulder 8 disposed on the inner wall of the socket body 1 to stop the retainer 3 from moving in the pipe insertion direction, the arrangement of the retainer stop shoulder 8 and the cap 5 being The retainer stop shoulder (8) allowing free axial movement of the gripping ring (4) and the retainer (3) therebetween; A third O-ring (2) for forming a sealing connection with the outer wall of the pipe (13); An o-ring stop shoulder 7 is arranged on the inner wall of the socket body 1 to stop the third o-ring 2 from moving in the pipe insertion direction.

The socket body 1 further includes a pipe connection 120.

The socket also includes an adapter; The adapter has an adapter body (101) having an axial passage (102) therein and also including a socket connection (110) for connecting with the socket and a pipe connection (111) for connecting with the pipe; An adapter flange 107 is disposed along the circumference of the outer wall of the socket connection part 110.

2, a first O-ring 105 is disposed in the socket connection 110 to form a sealing connection with the inner wall of the socket; A second O-ring 106 is arranged on the pipe connection 111 to form a sealing connection with the inner wall of the pipe.

A first positioning structure is disposed along the circumference of the outer wall of the socket connection portion 110 to position the first O-ring 105; A second positioning structure is arranged along the circumference of the outer wall of the pipe connection 111 to position the second O-ring 106.

The first positioning structure is a first groove 103 disposed circumferentially in the adapter flange 107, and the second positioning structure is disposed circumferentially on an outer wall of the adapter body 101. Second groove 104; The first O-ring 105 is disposed in the first groove 103 and the second O-ring 106 is disposed in the second groove 104.

A pipe stop shoulder 11 is arranged on the inner wall of the socket body 1 to stop the adapter and the pipe 13 from moving in the pipe insertion direction.

The length of the adapter is longer than the distance between the pipe stop shoulder 11 and the third O-ring 2.

The gap between the O-ring stop shoulder 7 and the retainer 3 is compressed when the pipe 13 is inserted into a socket and passes through the third O-ring 2. Wider than the axial width of the ring (2). This allows free compression of the third O-ring 2, which is separated from the retainer 3.

In the initial state the inner diameter of the tooth 10 is smaller than the outer diameter of the pipe 13, the inner diameter of the third O-ring 2 is smaller than the outer diameter of the pipe 13, and the separation The inner diameter of the ring 6 is larger than the outer diameter of the pipe 13.

The retainer 3 is annular and includes a lamp that engages the tooth 10.

The socket is provided with a cap stop shoulder 17 disposed on the inner wall of the socket body 1 between the gripping ring 4 and the cap 5 to stop the cap 5 from moving in the pipe insertion direction. ; It further comprises a projection 16 disposed on the outer wall of the separation ring to interact with the cap 5 to prevent the separation ring 6 from being pulled out of the socket.

The separation ring 6 has an acute angle at the end of the separation ring 6 proximate the gripping ring 4.

In the adapter, a first O-ring 105 is arranged at the socket connection to form a sealing connection with the inner wall of the pipe seal 120.

When the pipe 13 is inserted into the socket, the pipe first passes through the separating ring 6; Then, as the pipe 13 is further inserted, the outer wall of the pipe 13 comes into contact with the teeth 10 of the gripping ring 4, and in this step the teeth of the gripping ring make contact with the outer wall of the pipe. You can grasp. As the pipe 13 is further inserted, it passes through the retainer 3 and the third O-ring 2 and then to the adapter flange 107.

In order to withdraw the pipe 13 from the socket, the separating ring 6 is pushed in the pipe insertion direction, and then the end of the separating ring 6 proximate to the gripping ring separates the teeth from the outer wall of the pipe 13. By pushing as much as possible, the pipe 13 can be unlocked and pulled out of the socket.

The pipe 13 is preferably a multilayer pipe.

The socket with the adapter of this embodiment ensures that liquid (drinking water) flowing from any end of the adapter does not come into contact with the exposed metal at the end of the pipe, so that the liquid (drinking water) at the end of the pipe contacts the metal. It helps to avoid being threatened with health. In addition, the first O-ring 105 circumferentially arranged on the outer wall of the adapter ensures that the O-ring is always in contact with the inner wall of the socket even when there is a slight relative movement between the adapter and the inner wall of the socket. In addition to ensuring, increasing the friction between the adapter and the inner wall of the socket can increase the pressure applied to the inner wall of the socket to improve the binding force of the entire system.

Since the inner diameter of the teeth in the initial state is smaller than the outer diameter of the pipe, the teeth of the gripping ring can grip the outer wall of the pipe. Since the inner diameter of the third O-ring is smaller than the outer diameter of the pipe, the third O-ring can form a sealing connection with the outer wall of the pipe, and the inner diameter of the separation ring is larger than the outer diameter of the pipe. As it is larger, a sufficient clearance is formed between the separation ring and the pipe so that the pipe can be inserted without being restrained.

The retainer is annular and includes a lamp that engages the teeth. This allows the teeth of the gripping ring to bend when pushed by the pipe into which it is inserted.

A separation ring with an acute angle at the end of the separation ring adjacent to the O-ring ensures minimal contact with the teeth of the gripping ring.

Example 4

With reference to FIG. 6, the push fitting socket is arranged in the same direction as the pipe insertion direction: in the socket such as the separation ring 6, the gripping ring 4, the retainer 3, and the third O-ring 2. A cap 5 for preventing the missing element from falling out; A cap stop member (9) disposed at the end of the socket into which the pipe (13) is inserted to prevent the cap (5) from being pulled out; A separation ring (6) for unlocking the pipe (13); A gripping ring (4) comprising a flange (12) and a plurality of teeth (10) arranged on the flange for gripping the outer wall of the pipe (13); A retainer (3) in movable connection with the inner wall of the socket body (1) to stop the holding ring (4) from moving in the pipe insertion direction; A retainer stop shoulder 8 disposed on the inner wall of the socket body 1 to stop the retainer 3 from moving in the pipe insertion direction, the arrangement of the retainer stop shoulder 8 and the cap 5 being The retainer stop shoulder (8) allowing free axial movement of the gripping ring (4) and the retainer (3) therebetween; A third O-ring (2) for forming a sealing connection with the outer wall of the pipe (13); An o-ring stop shoulder 7 is arranged on the inner wall of the socket body 1 to stop the third o-ring 2 from moving in the pipe insertion direction.

The socket body 1 further includes a pipe connection 120.

The socket further comprises an adapter, the adapter having an axial passageway 102 therein, the adapter body also including a socket connection 110 for connecting with the socket and a pipe connection 111 for connecting with the pipe. 101); An adapter flange 107 is disposed along the circumference of the outer wall of the socket connection part 110.

A first O-ring (105) is disposed in the socket connection (110) to form a seal connection with the inner wall of the socket; A second O-ring 106 is arranged on the pipe connection 111 to form a sealing connection with the inner wall of the pipe.

A first positioning structure is disposed along the circumference of the outer wall of the socket connection portion 110 to position the first O-ring 105; A second positioning structure is arranged along the circumference of the outer wall of the pipe connection 111 to position the second O-ring 106.

Referring to FIG. 4, the first positioning structure is a first groove 103 arranged circumferentially in the adapter flange 107, and the second positioning structure is an outer wall of the adapter body 101. Is a second groove 104 disposed along the circumference; The first O-ring 105 is disposed in the first groove 103 and the second O-ring 106 is disposed in the second groove 104.

The first groove (103) comprises a pipe connection (111) side forming a first wall (108) and a socket connection (110) side forming a second wall (109); The first wall 108 and the second wall 109 are annular and the diameter of the first wall 108 is larger than the diameter of the second wall 109.

A pipe stop shoulder 11 is arranged on the inner wall of the socket body 1 to stop the adapter and the pipe 13 from moving in the pipe insertion direction.

The length of the adapter is longer than the distance between the pipe stop shoulder 11 and the third O-ring.

The socket also includes an O-ring point 14 disposed between the O-ring stop shoulder 7 and the retainer stop shoulder 8, the O adjacent to the third O-ring 2. At the end of the ring stop shoulder 7 a step 15 in sealing connection with the O-ring point 14 is arranged; The step is always in sealed connection with the O-ring point.

The gap between the O-ring stop shoulder 7 and the retainer 3 is compressed when the pipe 13 is inserted into a socket and passes through the third O-ring 2. Wider than the axial width of the ring (2).

In a preferred configuration, the gap between the O-ring stop shoulder 7 and the retainer 3 is compressed when the pipe 13 is inserted into a socket and passes through the third O-ring 2. As wide as the axial width of the third O-ring 2. This allows free compression of the third O-ring 2.

In the initial state the inner diameter of the tooth 10 is smaller than the outer diameter of the pipe 13, the inner diameter of the third O-ring 2 is smaller than the outer diameter of the pipe 13, and the separation The inner diameter of the ring 6 is larger than the outer diameter of the pipe 13.

The retainer 3 is annular and includes a lamp that engages the tooth 10.

The socket is provided with a cap stop shoulder 17 disposed on the inner wall of the socket body 1 between the gripping ring 4 and the cap 5 to stop the cap 5 from moving in the pipe insertion direction. ; It further comprises a projection 16 disposed on the outer wall of the separation ring to interact with the cap 5 to prevent the separation ring 6 from being pulled out of the socket.

The separation ring 6 has an acute angle at the end of the separation ring 6 proximate the gripping ring 4.

When the pipe 13 is inserted into the socket, the pipe first passes through the separating ring 6; Then, as the pipe 13 is further inserted, the outer wall of the pipe 13 comes into contact with the teeth 10 of the gripping ring 4. As the pipe 13 is further inserted, it passes through the retainer 3 and the third O-ring 2 and then to the adapter flange 107. At this time, the first O-ring is in sealing connection with the inner wall of the pipe stop shoulder, and the first wall 108 is in interaction with the socket to prevent the pipe from moving in the insertion direction.

In order to withdraw the pipe 13 from the socket, the separating ring 6 is pushed in the pipe insertion direction, and then the end of the separating ring 6 proximate to the gripping ring separates the teeth from the outer wall of the pipe 13. By being pushed as far as possible, the pipe 13 can be taken out of the socket. The pipe 13 is preferably a multilayer pipe.

The socket with the adapter of this embodiment ensures that liquid (drinking water) flowing from any end of the adapter does not come into contact with the metal exposed at the end of the pipe, thereby preventing It helps to avoid being threatened with health. In addition, the first O-ring 105 disposed circumferentially on the outer wall of the adapter, the third O-ring 2 is always a socket even when there is a slight relative movement between the adapter and the inner wall of the socket. In addition to ensuring contact with the inner wall of the socket, the pressure applied to the inner wall of the socket can be increased to improve the binding force of the entire system by increasing the friction between the adapter and the inner wall of the socket.

The socket includes an O-ring stop disposed between the O-ring stop shoulder and the retainer stop shoulder, and an end of the O-ring stop shoulder adjacent to the third O-ring is connected to the O-ring stop. A stepped portion in a sealed connection is disposed; The staircase is always in hermetically sealed connection with the O-ring point. This structure improves the sealing between the third O-ring and the inner wall of the socket, thereby ensuring the sealing of the entire system.

If the gap between the O-ring stop shoulder and the retainer is as wide as the axial width of the O-ring that is compressed when the pipe is inserted into the socket, the pressure generated by the third O-ring is not so great. This can facilitate the insertion of the pipe.

Since the inner diameter of the teeth in the initial state is smaller than the outer diameter of the pipe, the teeth of the gripping ring can grip the outer wall of the pipe. Since the inner diameter of the third O-ring is smaller than the outer diameter of the pipe, the third O-ring can form a sealing connection with the outer wall of the pipe, and the inner diameter of the separation ring is larger than the outer diameter of the pipe. As it is larger, a sufficient clearance is formed between the separation ring and the pipe so that the pipe can be inserted without being restrained.

The retainer is annular and includes a lamp that engages the teeth. This allows the teeth of the gripping ring to bend when pushed by the pipe into which it is inserted.

A separation ring with an acute angle at the end of the separation ring adjacent to the third O-ring 2 ensures minimal contact with the teeth of the gripping ring.

The foregoing detailed description has been described with reference to specific embodiments for purposes of explanation. The illustrative discussions above are not intended to be exhaustive or to limit the invention to the particular forms disclosed. Many modifications and variations can be made in light of the above teaching. This embodiment best describes the principles of the present invention and its practical application so that those skilled in the art can best utilize the present invention, and various embodiments having various modification forms are selected and described to suit a particular use.

1: socket body 2: third O-ring
3: retainer 4: gripping ring
5: cap 6: separating ring
7: O-ring stop shoulder 8: retainer stop shoulder
9: cap stop member 10: teeth
11: pipe stop shoulder 12: gripping ring flange
13: pipe 14: O-ring point
15: step 16: projection
17: cap stop shoulder 101: adapter body
102: passage 103: first groove
104: second groove 105: first O-ring
106: second O-ring 107: adapter flange
108: first wall 109: second wall
110: socket connection 111: pipe connection
112: pipe seal

Claims (13)

As an adapter,
An adapter body having an axial passage therein and including a socket connection for connecting with the socket and a pipe connection for connecting with the pipe;
A first O-ring is disposed in the socket connection to form a sealed connection with the inner wall of the socket; A second O-ring is arranged in the pipe connection to form a sealing connection with the inner wall of the pipe,
adapter. 2. The apparatus of claim 1, wherein a first positioning structure is disposed along the circumference of the outer wall of the socket connection portion for positioning the first O-ring;
A second positioning structure is arranged along the circumference of the outer wall of the pipe connection to position the second O-ring;
adapter. 3. The method of claim 2, wherein the first positioning structure is a first groove disposed along the circumference, and the second positioning structure is a second groove disposed along the circumference;
The first O-ring is disposed in the first groove, and the second O-ring is disposed in the second groove,
adapter. 4. The adapter of claim 3 wherein an adapter flange is disposed along the circumference of the outer wall of the socket connection and the first groove is disposed circumferentially on the adapter flange. 5. The apparatus of claim 4, wherein: the first groove comprises a pipe connection side forming a first wall and a socket connection side forming a second wall;
The first wall and the second wall are annular, and the diameter of the first wall is larger than the diameter of the second wall;
The first wall interacts with the socket to prevent the pipe from moving in the insertion direction,
adapter. Push fitting socket with adapter, in the direction of pipe insertion:
A pipe locking assembly for locking the pipe inserted in the socket;
A third O-ring for forming a sealing connection with the outer wall of the pipe;
An O-ring stop shoulder disposed on an inner wall of the socket body to stop the third O-ring from moving in the pipe insertion direction;
With pipe seal
A socket body configured;
Further includes an adapter,
The adapter has an adapter body having an axial passage therein and also including a socket connection for connecting with the socket and a pipe connection for connecting with the pipe;
A first O-ring is disposed in the socket connection to form a seal connection with the inner wall of the socket; A second O-ring is arranged in the pipe connection to form a sealing connection with the inner wall of the pipe,
Push fitting socket. 7. The apparatus of claim 6, wherein a first positioning structure is disposed along the circumference of the outer wall of the socket connection portion for positioning the first O-ring;
A second positioning structure is arranged along the circumference of the outer wall of the pipe connection to position the second O-ring;
Push fitting socket. 8. The method of claim 7, wherein the first positioning structure is a first groove disposed along the circumference, and the second positioning structure is a second groove disposed along the circumference;
The first O-ring is disposed in the first groove, and the second O-ring is disposed in the second groove,
Push fitting socket. 9. The apparatus of claim 8, wherein an adapter flange is disposed along the circumference of the outer wall of the socket connection portion, and the first groove is disposed circumferentially on the adapter flange;
A pipe stop element is arranged on the inner wall of the socket body to stop the adapter from moving in the pipe insertion direction.
Push fitting socket. 10. The method of claim 9, wherein: the first groove comprises a pipe connection side forming a first wall and a socket connection side forming a second wall;
The first wall and the second wall are annular and the diameter of the first wall is larger than the diameter of the second wall;
The pipe stop element is a pipe stop shoulder having an annular shape disposed along a circumference;
The inner diameter of the pipe stop shoulder is larger than the inner diameter of the second wall but smaller than the inner diameter of the first wall;
The first O-ring is in sealing connection with an inner wall of the pipe stop shoulder;
The first wall interacts with the pipe stop shoulder to prevent the pipe from moving in the insertion direction,
Push fitting socket. The pipe lock assembly of claim 10, wherein the pipe lock assembly comprises:
A cap for preventing the element in the socket from being pulled out;
A cap stop member disposed at an end of the socket into which the pipe is inserted to prevent the cap from being pulled out;
A demounting ring for unlocking the pipe;
A grab ring comprising a gripping ring flange and a plurality of teeth disposed on the gripping ring flange for gripping an outer wall of the pipe;
A retainer in movable connection with the inner wall of the socket body to stop the gripping ring from moving in the pipe insertion direction; And
A retainer stop shoulder disposed on the inner wall of the socket body to stop the retainer from moving in the pipe insertion direction.
Including, push fitting socket. 12. The method of claim 11 wherein the socket body comprises an O-ring point disposed between the O-ring stop shoulder and the retainer stop shoulder,
A step in sealing connection with the O-ring point is disposed at an end of the O-ring stop shoulder adjacent to the third O-ring;
The step is always kept in a sealingly movable connection with the O-ring point,
Push fitting socket. 13. The clearance of claim 12 wherein the gap between the O-ring stop shoulder and the retainer is no narrower than the axial width of the third O-ring that is compressed when the pipe passes through the third O-ring. ;
In the initial state the inner diameter of the tooth is smaller than the outer diameter of the pipe, the inner diameter of the third O-ring is smaller than the outer diameter of the pipe and the inner diameter of the separating ring is larger than the outer diameter of the pipe;
The retainer is annular and includes a lamp that engages the tooth;
The socket is:
A cap stop shoulder disposed on an inner wall of the socket body between the gripping ring and the cap to stop the cap from moving in the pipe insertion direction;
A bump disposed on an outer wall of the separation ring to interact with the cap to prevent the separation ring from falling out of the socket.
Includes;
The separation ring having a sharp angle at an end of the separation ring proximate the gripping ring,
Push fitting socket.

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