CN107838511A - A kind of copper pipe fast-connection pipeline and its Joining Technology - Google Patents

Abstract

The invention discloses a kind of copper pipe fast-connection pipeline, including a base tube, be provided with the base tube can be by the base tube together with being inserted into pipe fitting welding welder；A kind of quick Joining Technology of copper pipe is also disclosed, is comprised the following steps：Firstth, the part surface for being inserted into pipe fitting and the contact of both branch pipe or base tube is cleaned, and solder flux is applied to and is inserted on pipe fitting；Secondth, position to be welded is carried out being heated to corresponding brazing temperature；3rd, welded using induction welding equipment or flame mode of heating.The present invention can solve the welding of the φ 150 of φ 2 pipeline, and connecting pipe and the interface of pipe fitting to be connected is fully sealed, No leakage, and intensity is high, can be widely applied to the welding of copper pipe and copper pipe, copper pipe and metal tube, copper pipe and other metal tubes.

Description

A copper pipe quick connection pipe fitting and its connection process

technical field

The invention relates to a quick-connect copper pipe fitting and a connecting process thereof. The invention can be widely used in electromechanical processing and manufacturing, chemical pipeline connection, and especially in the field of air-conditioning pipeline connection.

technical background

At present, the pipelines and heat exchangers of air-conditioning equipment usually use copper pipes, and there are two main connection methods for copper pipes: brazing and welding and nano-connection.

The brazing welding method has firm welding and good sealing; but it needs welding materials-oxygen, acetylene, welding rod and flux, which is not easy to carry and is dangerous. In some occasions, there are flammable materials around the copper pipe, which cannot be welded. Poor hygienic conditions will damage the sense of smell and vision of the operator, and it is not convenient for industrial automation to connect copper pipes and fittings and many other situations.

The socket connection adopts a mechanical seal, and one end of the copper pipe is made into a bell mouth, and the inner surface of the bell mouth and the outer tapered surface of the socket joint are attached to each other, and finally the sealing surface is pressed tightly through the thread. The Nazi connection method does not need to carry welding equipment and materials, and the special tools are also very portable, and the connection operation time is very short, which is widely used in the connection of indoor and outdoor units of household air conditioners;

However, the sealing effect of the sealing surface is not very ideal, and it is prone to leakage. For example, the failure of the current household air conditioner is mainly due to insufficient refrigerant.

In addition to the above two connection methods, other connection methods are used for the connection of copper pipes, but there are always some deficiencies, such as low connection strength, high cost, or easy leakage.

Contents of the invention

The technical problem to be solved by the present invention is to overcome the above-mentioned deficiencies of the prior art, and provide a copper pipe quick-connect pipe fitting with good sealing effect, low cost, easy processing, low requirement for operator skills, and short connection time.

In order to solve the above problems, the present invention adopts the following technical solutions:

A copper pipe fast connecting pipe fitting comprises a base pipe, on which a welding device is arranged to weld the base pipe and the pipe fitting to be inserted.

Below is the further optimization of the present invention to above-mentioned scheme:

The soldering device is solder with a C-shaped structure, and the equivalent diameter of the solder is 1-10mm.

Further optimization: the welding device is arranged in the base pipe near the end.

Further optimization: first annular grooves with U-shaped cross-sections capable of accommodating solder are respectively provided at positions corresponding to the solder in the base pipe.

Further optimization: the inner diameter of the outer section of the first annular groove is 1-10 mm larger than the inner diameter of the base pipe, preferably 1-2 mm.

Another solution is: the base pipe is integrally connected with at least one branch pipe whose inner diameter is larger than the inner diameter of the base pipe, and the welding device is arranged near the middle of the branch pipe.

Further optimization: the positions corresponding to the solder in the branch pipe are respectively provided with second annular grooves with a U-shaped cross-section that can accommodate the solder.

Another solution is: the base pipe is integrally connected with at least one branch pipe whose inner diameter is larger than the inner diameter of the base pipe, and the welding device is arranged near the middle of the branch pipe.

Further optimization: the base pipe is integrally connected with at least one branch pipe whose inner diameter is larger than the inner diameter of the base pipe, and the welding device is arranged in the branch pipe near the end.

Further optimization: the positions corresponding to the solder in the branch pipe are respectively provided with second annular grooves with a U-shaped cross-section that can accommodate the solder.

Another solution is: the base pipe is integrally connected with at least one branch pipe whose inner diameter is larger than the inner diameter of the base pipe, and the welding device is arranged near the middle of the branch pipe.

Further optimization: the base pipe is integrally connected with at least one branch pipe whose inner diameter is larger than the inner diameter of the base pipe, and the welding device is arranged in the branch pipe near the end.

Further optimization: the inner diameter of the outer section of the second annular groove is 1-10 mm larger than the inner diameter of the branch pipe, preferably 1-2 mm.

Another solution is: the base pipe is integrally connected with at least one branch pipe whose inner diameter is larger than the inner diameter of the base pipe, and the welding device is arranged near the middle of the branch pipe.

Further optimization: the base pipe is integrally connected with at least one branch pipe whose inner diameter is larger than the inner diameter of the base pipe, and the welding device is arranged in the branch pipe near the end.

Further optimization: the positions corresponding to the solder in the branch pipe are respectively provided with bell mouths for placing solder.

The present invention also provides a quick connection process for the copper pipe quick connection pipe fittings, comprising the following steps:

First, clean the part of the surface that is in contact with the pipe fitting to be inserted and the branch pipe or the base pipe, and apply flux to the pipe fitting to be inserted;

Second, heat the part to be welded to the corresponding brazing temperature;

Third, use induction welding equipment or flame heating for welding.

The invention can solve the welding of φ2-φ150 pipes, so that the interface between the connecting pipe fitting and the pipe fitting to be connected is completely sealed, without leakage, and has high strength; and by setting the welding device, the requirements for the labor skills of the operator are greatly reduced, and the The operation of the upper welding rod reduces the labor intensity and complexity; moreover, multiple welding ports can be operated at the same time, which is convenient for the factory automatic production line to weld copper pipes and copper alloys; the special pipe fittings of the present invention are simple to manufacture, low in cost, and far lower than Nano connection method, simple structure, easy to weld, can be widely used in the welding of copper pipes and copper pipes, copper pipes and metal pipes (may need to replace the solder material), copper pipes and other metal pipe fittings.

The present invention will be further described below by means of the accompanying drawings and examples.

Description of drawings

Fig. 1 is the structural representation of the present invention in embodiment 1;

Fig. 2 is the structural representation of the present invention in embodiment 2;

Fig. 3 is the structural representation of the present invention in embodiment 3;

Fig. 4 is the structural representation of the present invention in embodiment 4;

Fig. 5 is the structural representation of the present invention in embodiment 5;

Fig. 6 is the structural representation of the present invention in embodiment 6;

Fig. 7 is the structural representation of the present invention in embodiment 7;

Fig. 8 is a schematic structural view of the present invention in Embodiment 8;

Fig. 9 is a schematic structural diagram of the present invention in Embodiment 9.

In the figure: 1-solder; 2-base pipe; 3-second annular groove; 4-branch pipe; 5-bell mouth; 7-boss; 8-first annular groove.

Detailed ways

Embodiment 1, as shown in Figure 1, a copper pipe quick-connect pipe fitting, including a base pipe 2 with a cylindrical structure, and two symmetrically arranged branch pipes 4 are integrally connected to the base pipe 2, and each branch pipe 4 communicates with each other , each branch pipe 4 is provided with at least one welding device for welding the branch pipe 4 and the pipe fitting to be inserted together.

The base pipe 2 is made of metals that are easy to weld with copper pipes, copper alloys and other metals, especially red copper and brass.

The inner diameter of the base pipe 2 is less than or equal to the inner diameter of the branch pipe 4 and greater than or equal to the inner diameter of the pipe fitting to be inserted, so that the design can ensure that no pressure drop and throttling will occur when the fluid circulates, and at the same time play a role in controlling the insertion length of the pipe fitting to be inserted role, and can ensure welding quality.

The inner diameter of each branch pipe 4 is slightly larger than the outer diameter of the pipe to be inserted, so as to meet the size requirements of the copper brazing gap.

The inner diameter of each branch pipe 4 decreases sequentially along the direction from the end of the branch pipe 4 away from the base pipe 2 to the end close to the base pipe 2, so that the design can control the insertion depth of the inserted pipe fittings to meet the brazing process.

Said welding devices are respectively arranged at the end of each branch pipe 4 away from the base pipe 2 or at the end close to the base pipe 2 .

The soldering device is a solder 1 with a C-shaped structure, the equivalent diameter of the solder 1 is 1-10mm, and the cross section of the solder 1 can be circular, rectangular, or other shapes.

One end of each branch pipe 4 away from the base pipe 2 or one end close to the base pipe 2 is integrally connected with a second annular groove 3 that can accommodate the solder 1 at a position corresponding to the solder 1, and each second annular groove 3 The cross section is U-shaped.

The inner diameter of the outer section of each second annular groove 3 is 1-10mm larger than the inner diameter of the branch pipe 4, preferably 1-2mm. When the pipe fitting to be inserted is inserted into the branch pipe 4, the second annular groove 3 and the inner diameter There is a gap of 1-10mm in the inserted pipe fittings, which can be used to observe the welding quality of the weld.

The connection process of the copper pipe quick connection pipe fittings includes the following steps:

a. Material selection

The solder 1 can be phosphor copper solder, silver-containing phosphor copper solder, or brass solder. The specific material used is determined according to the material of the welding workpiece and the base pipe 2, so as to meet the brazing process; For example, phosphor copper solder and silver-containing phosphor copper solder are used for copper and red copper welding, silver-containing phosphor copper solder is used for red copper and brass welding, and brass solder is used for red copper and ferrous metal welding.

b. Clean and apply flux

When welding, clean the surface of the part of the contact between the pipe fitting to be inserted and the branch pipe 4, and apply flux to the pipe fitting to be inserted;

When the branch pipe 4 is welded with the copper pipe, first clean the outer surface of the end of the copper pipe;

When the branch pipe 4 is welded with the copper alloy, in addition to cleaning the outer surface of the end, also apply flux;

When the branch pipe 4 is welded with the stainless steel pipe, it is filled with inert gas to prevent oxidation of the stainless steel and ensure the welding quality;

Then insert the pipe to be inserted into the corresponding branch pipe 4, and the diameter change in the middle of the branch pipe 4 can control the insertion depth.

c. Choose the heating method

There are many ways to heat the welding part. It can be heated by new commercially available induction welding equipment, or by traditional acetylene-oxygen, liquefied gas-oxygen or other flame heating.

d. Welding

(1) When using induction welding equipment, place the induction coil at the position of the second annular groove 3, that is, the part where the inserted pipe fitting overlaps with the branch pipe 4, when the temperature of the branch pipe 4 and the inserted pipe fitting reaches the corresponding brazing temperature, For example, at 600°C-750°C, the solder 1 melts into a liquid. At this time, due to capillary action, the solder liquid penetrates into the weld, cools naturally, observes the quality of the weld, and completes the operation.

(2) When flame heating is used, the branch pipe 4 is heated to deep red, and the solder 1 melts into a liquid. At this time, due to capillary action, the solder liquid penetrates into the weld, cools naturally, observes the quality of the weld, and completes the operation.

The comparison between the present invention and traditional brazing, Nazi connection is as follows:

project this invention traditional brazing Nanoconnection strength powerful powerful weak tightness zero leakage zero leakage Easy to leak service life long long generally Labor Skill Requirements Low high high cost very low Low higher Operability Simple complex Simple Can it adapt to the automated production line can more difficult more difficult Can realize the hermetic connection of copper and other metals easy more difficult more difficult Is there an open flame No open flames when using induction heating Yes no

Embodiment 2, as shown in FIG. 2 , a copper pipe quick-connect pipe fitting, including a base pipe 2, three branch pipes 4 are integrally connected to the base pipe 2, each branch pipe 4 communicates with each other, and each branch pipe 4 is provided with at least There is a welding device for welding the branch pipe 4 with the pipe to be inserted.

The base pipe 2 is made of metal that is easy to weld with copper pipes, copper alloys and other metals, especially red copper and brass, and a cavity communicating with each branch pipe 4 is opened in the base pipe 2 .

The inner diameter of the base pipe 2 is less than or equal to the inner diameter of the branch pipe 4 and greater than or equal to the inner diameter of the pipe fitting to be inserted, so that the design can ensure that no pressure drop and throttling will occur when the fluid circulates, and at the same time play a role in controlling the insertion length of the pipe fitting to be inserted role, and can ensure welding quality.

The three branch pipes 4 are integrally connected with the base pipe 2 to form a T-shaped structure, a Y-shaped structure or a special-shaped structure, and its specific structure can be designed according to needs.

The inner diameter of each of the branch pipes 4 is slightly larger than the outer diameter of the pipe to be inserted, so as to meet the size requirements of the copper brazing gap.

The inner diameter of each branch pipe 4 decreases sequentially along the direction from the end of the branch pipe 4 away from the base pipe 2 to the end close to the base pipe 2, so that the design can control the insertion depth of the inserted pipe fittings to meet the brazing process.

Said welding devices are respectively arranged at the end of each branch pipe 4 away from the base pipe 2 or at the end close to the base pipe 2 .

The soldering device is a solder 1 with a C-shaped structure, the equivalent diameter of the solder 1 is 1-10mm, and the cross section of the solder 1 can be circular, rectangular, or other shapes.

One end of each branch pipe 4 away from the base pipe 2 or one end close to the base pipe 2 is integrally connected with a second annular groove 3 capable of accommodating the solder 1 at a position corresponding to the solder 1, and each second annular groove 3 The cross section is U-shaped.

The inner diameter of the outer section of each second annular groove 3 is 1-10mm larger than the inner diameter of the branch pipe 4, preferably 1-2mm. When the pipe fitting to be inserted is inserted into the branch pipe 4, the second annular groove 3 and the inner diameter There is a gap of 1-10mm in the inserted pipe fittings, which can be used to observe the welding quality of the weld.

The connection process of the copper pipe quick connection pipe fittings includes the following steps:

a. Material selection

The solder 1 can be phosphor copper solder, silver-containing phosphor copper solder, or brass solder. The specific material used is determined according to the material of the welding workpiece and the base pipe 2, so as to meet the brazing process; For example, phosphor copper solder and silver-containing phosphor copper solder are used for copper and red copper welding, silver-containing phosphor copper solder is used for red copper and brass welding, and brass solder is used for red copper and ferrous metal welding.

b. Clean and apply flux

When welding, clean the surface of the part of the contact between the pipe fitting to be inserted and the branch pipe 4, and apply flux to the pipe fitting to be inserted;

When the branch pipe 4 is welded with the copper pipe, first clean the outer surface of the end of the copper pipe;

When the branch pipe 4 is welded with the copper alloy, in addition to cleaning the outer surface of the end, also apply flux;

When the branch pipe 4 is welded with the stainless steel pipe, it is filled with inert gas to prevent oxidation of the stainless steel and ensure the welding quality;

Then insert the pipe to be inserted into the corresponding branch pipe 4, and the diameter change in the middle of the branch pipe 4 can control the insertion depth.

c. Choose the heating method

There are many ways to heat the welding part. It can be heated by new commercially available induction welding equipment, or by traditional acetylene-oxygen, liquefied gas-oxygen or other flame heating.

d. Welding

(1) When using induction welding equipment, place the induction coil at the position of the second annular groove 3, that is, the part where the inserted pipe fitting overlaps with the branch pipe 4, when the temperature of the branch pipe 4 and the inserted pipe fitting reaches the corresponding brazing temperature, For example, at 600°C-750°C, the solder 1 melts into a liquid. At this time, due to capillary action, the solder liquid penetrates into the weld, cools naturally, observes the quality of the weld, and completes the operation.

(2) When flame heating is used, the branch pipe 4 is heated to deep red, and the solder 1 melts into a liquid. At this time, due to capillary action, the solder liquid penetrates into the weld, cools naturally, observes the quality of the weld, and completes the operation.

The comparison between the present invention and traditional brazing, Nazi connection is as follows:

project this invention traditional brazing Nanoconnection strength powerful powerful weak tightness zero leakage zero leakage Easy to leak service life long long generally Labor Skill Requirements Low high high cost very low Low higher Operability Simple complex Simple Can it adapt to the automated production line can more difficult more difficult Can realize the hermetic connection of copper and other metals easy more difficult more difficult Is there an open flame No open flames when using induction heating Yes no

Embodiment 3, as shown in FIG. 3 , a copper pipe quick-connect pipe fitting, including a base pipe 2 with a U-shaped structure, and the base pipe 2 is integrally connected with two branch pipes 4 whose axes are not on the same straight line. communicate with each other, each branch pipe 4 is provided with at least one welding device for welding the branch pipe 4 and the pipe to be inserted together.

The base pipe 2 is made of metals that are easy to weld with copper pipes, copper alloys and other metals, especially red copper and brass, and a cavity with a circular cross-section communicating with each branch pipe 4 is opened in the base pipe 2 .

The inner diameter of the base pipe 2 is less than or equal to the inner diameter of the branch pipe 4 and greater than or equal to the inner diameter of the pipe fitting to be inserted, so that the design can ensure that no pressure drop and throttling will occur when the fluid circulates, and at the same time play a role in controlling the insertion length of the pipe fitting to be inserted role, and can ensure welding quality.

The inner diameter of each of the branch pipes 4 is slightly larger than the outer diameter of the pipe to be inserted, so as to meet the size requirements of the copper brazing gap.

The inner diameter of each branch pipe 4 decreases sequentially along the direction from the end of the branch pipe 4 away from the base pipe 2 to the end close to the base pipe 2, so that the design can control the insertion depth of the inserted pipe fittings to meet the brazing process.

Said welding devices are respectively arranged at the end of each branch pipe 4 away from the base pipe 2 or at the end close to the base pipe 2 .

The soldering device is a solder 1 with a C-shaped structure, the equivalent diameter of the solder 1 is 1-10mm, and the cross section of the solder 1 can be circular, rectangular, or other shapes.

One end of each branch pipe 4 away from the base pipe 2 or one end close to the base pipe 2 is integrally connected with a second annular groove 3 capable of accommodating the solder 1 at a position corresponding to the solder 1, and each second annular groove 3 The cross section is U-shaped.

The inner diameter of the outer section of each second annular groove 3 is 1mm-10mm larger than the inner diameter of the branch pipe 4, preferably 1mm-2mm. When the pipe to be inserted is inserted into the branch pipe 4, the second annular groove 3 and the inner diameter There is a gap of 1mm-10mm in the inserted pipe fittings, which can be used to observe the welding quality of the weld.

The connection process of the copper pipe quick connection pipe fittings includes the following steps:

a. Material selection

The solder 1 can be phosphor copper solder, silver-containing phosphor copper solder, or brass solder. The specific material used is determined according to the material of the welding workpiece and the base pipe, so as to meet the brazing process; for example Red copper and red copper welding use phosphor copper solder, silver-containing phosphor copper solder, red copper and brass welding use silver-containing phosphor copper solder, red copper and ferrous metal welding use brass solder.

b. Clean and apply flux

When welding, clean the surface of the part of the contact between the pipe fitting to be inserted and the branch pipe 4, and apply flux to the pipe fitting to be inserted;

When the branch pipe 4 is welded with the copper pipe, first clean the outer surface of the end of the copper pipe;

When the branch pipe 4 is welded with the copper alloy, in addition to cleaning the outer surface of the end, also apply flux;

When the branch pipe 4 is welded with the stainless steel pipe, it is filled with inert gas to prevent oxidation of the stainless steel and ensure the welding quality;

Then insert the pipe to be inserted into the corresponding branch pipe 4, and the diameter change in the middle of the branch pipe 4 can control the insertion depth.

c. Choose the heating method

There are many ways to heat the welding part. It can be heated by new commercially available induction welding equipment, or by traditional acetylene-oxygen, liquefied gas-oxygen or other flame heating.

d. Welding

(1) When using induction welding equipment, place the induction coil at the position of the second annular groove 3, that is, the part where the inserted pipe fitting overlaps with the branch pipe 4, when the temperature of the branch pipe 4 and the inserted pipe fitting reaches the corresponding brazing temperature, For example, at 600°C-750°C, the solder 1 melts into a liquid. At this time, due to capillary action, the solder liquid penetrates into the weld, cools naturally, observes the quality of the weld, and completes the operation.

(2) When flame heating is used, the branch pipe 4 is heated to deep red, and the solder 1 melts into a liquid. At this time, due to capillary action, the solder liquid penetrates into the weld, cools naturally, observes the quality of the weld, and completes the operation.

The comparison between the present invention and traditional brazing, Nazi connection is as follows:

project this invention traditional brazing Nanoconnection strength powerful powerful weak tightness zero leakage zero leakage Easy to leak service life long long generally Labor Skill Requirements Low high high cost very low Low higher Operability Simple complex Simple Can it adapt to the automated production line can more difficult more difficult Can realize the hermetic connection of copper and other metals easy more difficult more difficult Is there an open flame No open flames when using induction heating Yes no

Embodiment 4, as shown in FIG. 4 , a copper pipe quick-connect pipe fitting includes a base pipe 2 with a cross-shaped structure, and four symmetrically arranged branch pipes 4 are integrally connected to the base pipe 2, and each branch pipe 4 is mutually connected. Each branch pipe 4 is provided with at least one welding device for welding the branch pipe 4 and the pipe to be inserted.

The base pipe 2 is made of metal that is easy to weld with copper pipes, copper alloys and other metals, especially red copper and brass, and a cavity communicating with each branch pipe 4 is opened in the base pipe 2 .

The inner diameter of the base pipe 2 is less than or equal to the inner diameter of the branch pipe 4 and greater than or equal to the inner diameter of the pipe fitting to be inserted, so that the design can ensure that no pressure drop and throttling will occur when the fluid circulates, and at the same time play a role in controlling the insertion length of the pipe fitting to be inserted role, and can ensure welding quality.

The inner diameter of each of the branch pipes 4 is slightly larger than the outer diameter of the pipe to be inserted, so as to meet the size requirements of the copper brazing gap.

The inner diameter of each branch pipe 4 decreases sequentially along the direction from the end of the branch pipe 4 away from the base pipe 2 to the end close to the base pipe 2, so that the design can control the insertion depth of the inserted pipe fittings to meet the brazing process.

Said welding devices are respectively arranged at the end of each branch pipe 4 away from the base pipe 2 or at the end close to the base pipe 2 .

The soldering device is a solder 1 with a C-shaped structure, the equivalent diameter of the solder 1 is 1-10mm, and the cross section of the solder 1 can be circular, rectangular, or other shapes.

One end of each branch pipe 4 away from the base pipe 2 or one end close to the base pipe 2 is integrally connected with a second annular groove 3 capable of accommodating the solder 1 at a position corresponding to the solder 1, and each second annular groove 3 The cross section is U-shaped.

The inner diameter of the outer section of each second annular groove 3 is 1-10mm larger than the inner diameter of the branch pipe 4, preferably 1-2mm. When the pipe fitting to be inserted is inserted into the branch pipe 4, the second annular groove 3 and the inner diameter There is a gap of 1-10mm in the inserted pipe fittings, which can be used to observe the welding quality of the weld.

The connection process of the copper pipe quick connection pipe fittings includes the following steps:

a. Material selection

The solder 1 can be phosphor copper solder, silver-containing phosphor copper solder, or brass solder. The specific material used is determined according to the material of the welding workpiece and the base pipe 2, so as to meet the brazing process; For example, phosphor copper solder and silver-containing phosphor copper solder are used for copper and red copper welding, silver-containing phosphor copper solder is used for red copper and brass welding, and brass solder is used for red copper and ferrous metal welding.

b. Clean and apply flux

When welding, clean the surface of the part of the contact between the pipe fitting to be inserted and the branch pipe 4, and apply flux to the pipe fitting to be inserted;

When the branch pipe 4 is welded with the copper pipe, first clean the outer surface of the end of the copper pipe;

When the branch pipe 4 is welded with the copper alloy, in addition to cleaning the outer surface of the end, also apply flux;

When the branch pipe 4 is welded with the stainless steel pipe, it is filled with inert gas to prevent oxidation of the stainless steel and ensure the welding quality;

Then insert the pipe to be inserted into the corresponding branch pipe 4, and the diameter change in the middle of the branch pipe 4 can control the insertion depth.

c. Choose the heating method

There are many ways to heat the welding part. It can be heated by new commercially available induction welding equipment, or by traditional acetylene-oxygen, liquefied gas-oxygen or other flame heating.

d. Welding

(1) When using induction welding equipment, place the induction coil at the position of the second annular groove 3, that is, the part where the inserted pipe fitting overlaps with the branch pipe 4, when the temperature of the branch pipe 4 and the inserted pipe fitting reaches the corresponding brazing temperature, For example, at 600°C-750°C, the solder 1 melts into a liquid. At this time, due to capillary action, the solder liquid penetrates into the weld, cools naturally, observes the quality of the weld, and completes the operation.

(2) When flame heating is used, the branch pipe 4 is heated to deep red, and the solder 1 melts into a liquid. At this time, due to capillary action, the solder liquid penetrates into the weld, cools naturally, observes the quality of the weld, and completes the operation.

The comparison between the present invention and traditional brazing, Nazi connection is as follows:

project this invention traditional brazing Nanoconnection strength powerful powerful weak tightness zero leakage zero leakage Easy to leak service life long long generally Labor Skill Requirements Low high high cost very low Low higher Operability Simple complex Simple Can it adapt to the automated production line can more difficult more difficult Can realize the hermetic connection of copper and other metals easy more difficult more difficult Is there an open flame No open flames when using induction heating Yes no

Embodiment 5, as shown in Figure 5, a copper pipe quick-connect pipe fitting, including a base pipe 2 with a cylindrical structure, one end of the base pipe 2 is integrally connected with a branch pipe 4, and at least one of the base pipe 2 and the branch pipe 4 is provided. A welding device for welding the branch pipe 4 or the base pipe 2 with the pipe to be inserted.

The base pipe 2 is made of metals that are easy to weld with copper pipes, copper alloys and other metals, especially red copper and brass.

The inner diameter of the base pipe 2 is smaller than the inner diameter of the branch pipe 4 and greater than or equal to the inner diameter of the pipe fitting to be inserted, so that the design can ensure that no pressure drop and throttling will occur when the fluid circulates, and at the same time play a role in controlling the insertion length of the pipe fitting to be inserted. And can guarantee the welding quality.

The inner diameter of the branch pipe 4 is slightly larger than the outer diameter of the pipe to be inserted, so as to meet the size requirements of the copper brazing gap.

The inner diameter of the branch pipe 4 is larger than the inner diameter of the base pipe 2, which is designed to facilitate the connection of pipes of different diameters.

The inner diameter of the branch pipe 4 gradually decreases along the direction from the end of the branch pipe 4 away from the base pipe 2 to the end close to the base pipe 2, so that the design can control the insertion depth of the inserted pipe fittings to meet the brazing process.

On the inner wall of the base pipe 2 near the middle, a boss 7 with a ring structure with a certain height is provided, and the boss 7 is used to limit the insertion depth of the inserted pipe.

Said welding devices are respectively arranged on the end of the branch pipe 4 away from the base pipe 2 or near the end of the base pipe 2 and at the end of the base pipe 2 away from the branch pipe 4 or near the boss 7 .

The welding devices are all solder 1 with a C-shaped structure, the equivalent diameter of the solder 1 is 1-10mm, and the cross section of the solder 1 can be circular, rectangular, or other shapes.

A second annular groove 3 capable of accommodating the solder 1 is integrally connected to the position corresponding to the solder 1 at one end of the branch pipe 4 away from the base tube 2 or at an end close to the base tube 2 .

The position corresponding to the solder 1 on the base tube 2 is integrally connected with a first annular groove 8 capable of accommodating the solder 1 .

The sections of the first annular groove 8 and the second annular groove 3 are both U-shaped.

The inner diameter of the outer section of the first annular groove 8 is 1-10 mm larger than the inner diameter of the base pipe 2 where it is located, preferably 1-2 mm. After the pipe to be inserted is inserted into the base pipe 2, the first annular groove 8 There is a gap of 1-10mm with the inserted pipe fittings to observe the welding quality of the weld.

The inner diameter of the outer section of the second annular groove 3 is 1-10mm larger than the inner diameter of the branch pipe 4 where it is located, preferably 1-2mm. After the pipe fitting to be inserted is inserted into the branch pipe 4, the second annular groove 3 and the inner diameter There is a gap of 1-10mm in the inserted pipe fittings, which can be used to observe the welding quality of the weld.

The connection process of the copper pipe quick connection pipe fittings includes the following steps:

a. Material selection

The solder 1 can be phosphor copper solder, silver-containing phosphor copper solder, or brass solder. The specific material used is determined according to the material of the welding workpiece and the base pipe, so as to meet the brazing process; for example Red copper and red copper welding use phosphor copper solder, silver-containing phosphor copper solder, red copper and brass welding use silver-containing phosphor copper solder, red copper and ferrous metal welding use brass solder.

b. Clean and apply flux

When welding, clean the surface of the contact part of the pipe fitting to be inserted and the branch pipe 4 or the base pipe 2, and apply flux to the pipe fitting to be inserted;

When the branch pipe 4 or the base pipe 2 is welded with the copper pipe, first clean the outer surface of the end of the copper pipe;

When the branch pipe 4 or the base pipe 2 is welded with the copper alloy, in addition to cleaning the outer surface of the end, apply flux;

When the branch pipe 4 or the base pipe 2 is welded with the stainless steel pipe, it is filled with inert gas to prevent oxidation of the stainless steel and ensure the welding quality;

Then insert the pipe fitting to be inserted into the corresponding branch pipe 4 or base pipe 2, and the diameter reduction in the middle of the branch pipe 4 can control the insertion depth, and the boss 7 in the base pipe 2 can control the depth of inserting the insert pipe into the base pipe 2.

c. Choose the heating method

There are many ways to heat the welding part. It can be heated by new commercially available induction welding equipment, or by traditional acetylene-oxygen, liquefied gas-oxygen or other flame heating.

d. Welding

(1) When using induction welding equipment, place the induction coil at the position of the first annular groove 8 or the second annular groove 3, that is, the part where the inserted pipe fitting overlaps with the branch pipe 4 or the base pipe 2. When the branch pipe 4 or the base pipe 2 When the temperature of the pipe 2 and the inserted pipe fitting reaches the corresponding brazing temperature, for example, when the temperature is 600°C-750°C, the solder 1 melts into a liquid. At this time, due to capillary action, the solder liquid penetrates into the weld, cools naturally, and observes the quality of the weld. Done.

(2) When using flame heating, heat the branch pipe 4 or the base pipe 2 until it is dark red, and the solder 1 melts into a liquid. At this time, due to capillary action, the solder liquid penetrates into the weld, cools naturally, observes the quality of the weld, and completes operate.

The comparison between the present invention and traditional brazing, Nazi connection is as follows:

project this invention traditional brazing Nanoconnection strength powerful powerful weak tightness zero leakage zero leakage Easy to leak service life long long generally Labor Skill Requirements Low high high cost very low Low higher Operability Simple complex Simple Can it adapt to the automated production line can more difficult more difficult Can realize the hermetic connection of copper and other metals easy more difficult more difficult Is there an open flame No open flames when using induction heating Yes no

Embodiment 6, as shown in Figure 6, a copper pipe quick-connect pipe fitting, including a base pipe 2 with a cylindrical structure, and two symmetrically arranged branch pipes 4 are integrally connected to the base pipe 2, and each branch pipe 4 communicates with each other , each branch pipe 4 is provided with at least one welding device for welding the branch pipe 4 and the pipe fitting to be inserted together.

The base pipe 2 is made of metals that are easy to weld with copper pipes, copper alloys and other metals, especially red copper and brass.

The inner diameter of the base pipe 2 is less than or equal to the inner diameter of the branch pipe 4 and greater than or equal to the inner diameter of the pipe fitting to be inserted, so that the design can ensure that no pressure drop and throttling will occur when the fluid circulates, and at the same time play a role in controlling the insertion length of the pipe fitting to be inserted role, and can ensure welding quality.

The inner diameter of each of the branch pipes 4 is slightly larger than the outer diameter of the pipe to be inserted, so as to meet the size requirements of the copper brazing gap.

The inner diameter of each branch pipe 4 decreases sequentially along the direction from the end of the branch pipe 4 away from the base pipe 2 to the end close to the base pipe 2, so that the design can control the insertion depth of the inserted pipe fittings to meet the brazing process.

The welding device is respectively arranged in the position near the middle of each branch pipe 4. The welding device is a solder 1 with a C-shaped structure. The equivalent diameter of the solder 1 is 1-10mm, and the cross section of the solder 1 can be circular or rectangular. Other shapes are also possible.

The positions corresponding to the solder 1 in each of the branch pipes 4 are provided with a second annular groove 3 capable of accommodating the solder 1, and the cross-section of each second annular groove 3 is U-shaped, so that the design can be welded vertically. When using, let the melted solder permeate to the bottom to ensure the welding quality of the welding joint.

The connection process of the copper pipe quick connection pipe fittings includes the following steps:

a. Material selection

The solder 1 can be phosphor copper solder, silver-containing phosphor copper solder, or brass solder. The specific material used is determined according to the material of the welding workpiece and the base pipe, so as to meet the brazing process; for example Red copper and red copper welding use phosphor copper solder, silver-containing phosphor copper solder, red copper and brass welding use silver-containing phosphor copper solder, red copper and ferrous metal welding use brass solder.

b. Clean and apply flux

When welding, clean the part of the surface that is in contact with the pipe fitting to be inserted and the branch pipe, and apply flux to the pipe fitting to be inserted;

When the branch pipe 4 is welded with the copper pipe, first clean the outer surface of the end of the copper pipe;

When the branch pipe 4 is welded with the copper alloy, in addition to cleaning the outer surface of the end, also apply flux;

When the branch pipe 4 is welded with the stainless steel pipe, it is filled with inert gas to prevent oxidation of the stainless steel and ensure the welding quality;

Then insert the pipe to be inserted into the corresponding branch pipe 4, and the diameter change in the middle of the branch pipe 4 can control the insertion depth.

c. Choose the heating method

There are many ways to heat the welding part. It can be heated by new commercially available induction welding equipment, or by traditional acetylene-oxygen, liquefied gas-oxygen or other flame heating.

d. Welding

(1) When using induction welding equipment, place the induction coil at the position of the second annular groove 3, that is, the part where the inserted pipe fitting overlaps with the branch pipe 4, when the temperature of the branch pipe 4 and the inserted pipe fitting reaches the corresponding brazing temperature, For example, at 600°C-750°C, the solder 1 melts into a liquid. At this time, due to capillary action, the solder liquid penetrates into the weld, cools naturally, observes the quality of the weld, and completes the operation.

(2) When flame heating is used, the branch pipe 4 is heated to deep red, and the solder 1 melts into a liquid. At this time, due to capillary action, the solder liquid penetrates into the weld, cools naturally, observes the quality of the weld, and completes the operation.

The comparison between the present invention and traditional brazing, Nazi connection is as follows:

project this invention traditional brazing Nanoconnection strength powerful powerful weak tightness zero leakage zero leakage Easy to leak service life long long generally Labor Skill Requirements Low high high cost very low Low higher Operability Simple complex Simple Can it adapt to the automated production line can more difficult more difficult Can realize the hermetic connection of copper and other metals easy more difficult more difficult Is there an open flame No open flames when using induction heating Yes no

Embodiment 7, as shown in Figure 7, a copper tube quick-connect pipe fitting, including a base pipe 2 with a cylindrical structure, and two symmetrically arranged branch pipes 4 are integrally connected to the base pipe 2, and each branch pipe 4 communicates with each other , each branch pipe 4 is provided with at least one welding device for welding the branch pipe 4 and the pipe fitting to be inserted together.

The base pipe 2 is made of metals that are easy to weld with copper pipes, copper alloys and other metals, especially red copper and brass.

The inner diameter of the base pipe 2 is less than or equal to the inner diameter of the branch pipe 4 and greater than or equal to the inner diameter of the pipe fitting to be inserted, so that the design can ensure that no pressure drop and throttling will occur when the fluid circulates, and at the same time play a role in controlling the insertion length of the pipe fitting to be inserted role, and can ensure welding quality.

The inner diameter of each branch pipe 4 is slightly larger than the outer diameter of the pipe to be inserted, so as to meet the size requirements of the copper brazing gap.

The inner diameter of each branch pipe 4 decreases sequentially along the direction from the end of the branch pipe 4 away from the base pipe 2 to the end close to the base pipe 2, so that the design can control the insertion depth of the inserted pipe fittings to meet the brazing process.

Described welding device is respectively arranged in the position near two ends in each branch pipe 4, and welding device is the solder 1 of C-shaped structure, and the equivalent diameter of solder 1 is 1-10mm, and the cross section of solder 1 can be circular, rectangular , and other shapes are also possible.

The positions corresponding to the solder 1 in each branch pipe 4 are respectively provided with a second annular groove 3 capable of accommodating the solder 1, and the cross-section of each second annular groove 3 is U-shaped, and each branch pipe 4 is provided with a The two second annular grooves 3 can make the molten solder permeate to the middle of the branch pipe 4 to ensure that the welding is full.

The inner diameter of the outer section of each second annular groove 3 located at the end of the branch pipe 4 away from the base pipe 2 is 1mm-10mm larger than the inner diameter of the branch pipe 4, preferably 1mm-2mm, when the pipe to be inserted is inserted into the branch pipe 4 Finally, a gap of 1mm-10mm is left between the second annular groove 3 and the inserted pipe fitting to observe the welding quality of the weld seam.

The connection process of the copper pipe quick connection pipe fittings includes the following steps:

a. Material selection

The solder 1 can be phosphor copper solder, silver-containing phosphor copper solder, or brass solder. The specific material used is determined according to the material of the welding workpiece and the base pipe, so as to meet the brazing process; for example Red copper and red copper welding use phosphor copper solder, silver-containing phosphor copper solder, red copper and brass welding use silver-containing phosphor copper solder, red copper and ferrous metal welding use brass solder.

b. Clean and apply flux

When welding, clean the surface of the part of the contact between the pipe fitting to be inserted and the branch pipe 4, and apply flux to the pipe fitting to be inserted;

When the branch pipe 4 is welded with the copper pipe, first clean the outer surface of the end of the copper pipe;

When the branch pipe 4 is welded with the copper alloy, in addition to cleaning the outer surface of the end, also apply flux;

When the branch pipe 4 is welded with the stainless steel pipe, it is filled with inert gas to prevent oxidation of the stainless steel and ensure the welding quality;

Then insert the pipe to be inserted into the corresponding branch pipe 4, and the diameter change in the middle of the branch pipe 4 can control the insertion depth.

c. Choose the heating method

There are many ways to heat the welding part. It can be heated by new commercially available induction welding equipment, or by traditional acetylene-oxygen, liquefied gas-oxygen or other flame heating.

d. Welding

(1) When using induction welding equipment, place the induction coil at the position of the second annular groove 3, that is, the part where the inserted pipe fitting overlaps with the branch pipe 4, when the temperature of the branch pipe 4 and the inserted pipe fitting reaches the corresponding brazing temperature, For example, at 600°C-750°C, the solder 1 melts into a liquid. At this time, due to capillary action, the solder liquid penetrates into the weld, cools naturally, observes the quality of the weld, and completes the operation.

(2) When flame heating is used, the branch pipe 4 is heated to deep red, and the solder 1 melts into a liquid. At this time, due to capillary action, the solder liquid penetrates into the weld, cools naturally, observes the quality of the weld, and completes the operation.

The comparison between the present invention and traditional brazing, Nazi connection is as follows:

project this invention traditional brazing Nanoconnection strength powerful powerful weak tightness zero leakage zero leakage Easy to leak service life long long generally Labor Skill Requirements Low high high cost very low Low higher Operability Simple complex Simple Can it adapt to the automated production line can more difficult more difficult Can realize the hermetic connection of copper and other metals easy more difficult more difficult Is there an open flame No open flames when using induction heating Yes no

Embodiment 8, as shown in Figure 8, a copper tube quick-connect pipe fitting, including a base pipe 2 with a cylindrical structure, and two symmetrically arranged branch pipes 4 are integrally connected to the base pipe 2, and each branch pipe 4 communicates with each other , each branch pipe 4 is provided with at least one welding device for welding the branch pipe 4 and the pipe fitting to be inserted together.

The base pipe 2 is made of metals that are easy to weld with copper pipes, copper alloys and other metals, especially red copper and brass.

The inner diameter of the base pipe 2 is less than or equal to the inner diameter of the branch pipe 4 and greater than or equal to the inner diameter of the pipe fitting to be inserted, so that the design can ensure that there will be no pressure drop and throttling when the fluid circulates, and at the same time play a role in controlling the insertion length of the pipe fitting to be inserted role, and can ensure welding quality.

The inner diameter of each branch pipe 4 is slightly larger than the outer diameter of the pipe to be inserted, so as to meet the size requirements of the copper brazing gap.

The inner diameter of each branch pipe 4 decreases sequentially along the direction from the end of the branch pipe 4 away from the base pipe 2 to the end close to the base pipe 2, so that the design can control the insertion depth of the inserted pipe fittings to meet the brazing process.

Described welding device is respectively arranged in each branch pipe 4 and is away from one end of base pipe 2, and welding device is the solder 1 of C-shaped structure, and the equivalent diameter of solder 1 is 1-10mm, and the cross section of solder 1 can be circular, Rectangle, but other shapes are also possible.

A bell mouth 5 for placing the solder 1 is respectively provided at the position corresponding to the solder 1 on the end of each branch pipe 4 away from the base tube 2 .

The connection process of the copper pipe quick connection pipe fittings includes the following steps:

a. Material selection

The solder 1 can be phosphor copper solder, silver-containing phosphor copper solder, or brass solder. The specific material used is determined according to the material of the welding workpiece and the base pipe 2, so as to meet the brazing process; For example, phosphor copper solder and silver-containing phosphor copper solder are used for copper and red copper welding, silver-containing phosphor copper solder is used for red copper and brass welding, and brass solder is used for red copper and ferrous metal welding.

b. Clean and apply flux

When welding, clean the surface of the part of the contact between the pipe fitting to be inserted and the branch pipe 4, and apply flux to the pipe fitting to be inserted;

When the branch pipe 4 is welded with the copper pipe, first clean the outer surface of the end of the copper pipe;

When the branch pipe 4 is welded with the copper alloy, in addition to cleaning the outer surface of the end, also apply flux;

When the branch pipe 4 is welded with the stainless steel pipe, it is filled with inert gas to prevent oxidation of the stainless steel and ensure the welding quality;

Then insert the pipe to be inserted into the corresponding branch pipe 4, and the diameter change in the middle of the branch pipe 4 can control the insertion depth.

c. Choose the heating method

There are many ways to heat the welding part. It can be heated by new commercially available induction welding equipment, or by traditional acetylene-oxygen, liquefied gas-oxygen or other flame heating.

d. Welding

(1) When using induction welding equipment, place the induction coil at the position of the bell mouth 5, that is, the part where the inserted pipe fitting overlaps with the branch pipe 4. When the temperature of the branch pipe 4 and the inserted pipe fitting reaches the corresponding brazing temperature, for example, 600 At ℃-750℃, the solder 1 melts into a liquid. At this time, due to capillary action, the solder liquid penetrates into the weld, cools naturally, observes the quality of the weld, and completes the operation.

(2) When flame heating is used, the branch pipe 4 is heated to deep red, and the solder 1 melts into a liquid. At this time, due to capillary action, the solder liquid penetrates into the weld, cools naturally, observes the quality of the weld, and completes the operation.

The comparison between the present invention and traditional brazing, Nazi connection is as follows:

project this invention traditional brazing Nanoconnection strength powerful powerful weak tightness zero leakage zero leakage Easy to leak service life long long generally Labor Skill Requirements Low high high cost very low Low higher Operability Simple complex Simple Can it adapt to the automated production line can more difficult more difficult Can realize the hermetic connection of copper and other metals easy more difficult more difficult Is there an open flame No open flames when using induction heating Yes no

Embodiment 9, as shown in Figure 9, a copper tube quick-connect pipe fitting, including a base pipe 2 with a cylindrical structure, and two symmetrically arranged branch pipes 4 are integrally connected to the base pipe 2, and each branch pipe 4 communicates with each other , each branch pipe 4 is provided with at least one welding device for welding the branch pipe 4 and the pipe fitting to be inserted together.

The base pipe 2 is made of metals that are easy to weld with copper pipes, copper alloys and other metals, especially red copper and brass.

The inner diameter of the base pipe 2 is less than or equal to the inner diameter of the branch pipe 4 and greater than or equal to the inner diameter of the pipe fitting to be inserted, so that the design can ensure that no pressure drop and throttling will occur when the fluid circulates, and at the same time play a role in controlling the insertion length of the pipe fitting to be inserted role, and can ensure welding quality.

The inner diameter of each of the branch pipes 4 is slightly larger than the outer diameter of the pipe to be inserted, so as to meet the size requirements of the copper brazing gap.

The inner diameter of each branch pipe 4 decreases sequentially along the direction from the end of the branch pipe 4 away from the base pipe 2 to the end close to the base pipe 2, so that the design can control the insertion depth of the inserted pipe fittings to meet the brazing process.

Described welding device is respectively arranged in each branch pipe 4 near one end of base pipe 2, and welding device is the solder 1 of C-shaped structure, and the equivalent diameter of solder 1 is 1-10mm, and the cross section of solder 1 can be circular, Rectangle, but other shapes are also possible.

The positions corresponding to the solder 1 in each of the branch pipes 4 are provided with a second annular groove 3 capable of accommodating the solder 1, and the cross-section of each second annular groove 3 is U-shaped, so that the design can be welded vertically. When using, let the melted solder permeate to the bottom to ensure the welding quality of the welding joint.

The connection process of the copper pipe quick connection pipe fittings includes the following steps:

a. Material selection

The solder 1 can be phosphor copper solder, silver-containing phosphor copper solder, or brass solder. The specific material used is determined according to the material of the welding workpiece and the base pipe, so as to meet the brazing process; for example Red copper and red copper welding use phosphor copper solder, silver-containing phosphor copper solder, red copper and brass welding use silver-containing phosphor copper solder, red copper and ferrous metal welding use brass solder.

b. Clean and apply flux

When welding, clean the part of the surface that is in contact with the pipe fitting to be inserted and the branch pipe, and apply flux to the pipe fitting to be inserted;

When the branch pipe 4 is welded with the copper pipe, first clean the outer surface of the end of the copper pipe;

When the branch pipe 4 is welded with the copper alloy, in addition to cleaning the outer surface of the end, also apply flux;

When the branch pipe 4 is welded with the stainless steel pipe, it is filled with inert gas to prevent oxidation of the stainless steel and ensure the welding quality;

Then insert the pipe to be inserted into the corresponding branch pipe 4, and the diameter change in the middle of the branch pipe 4 can control the insertion depth.

c. Choose the heating method

There are many ways to heat the welding part. It can be heated by new commercially available induction welding equipment, or by traditional acetylene-oxygen, liquefied gas-oxygen or other flame heating.

d. Welding

(1) When using induction welding equipment, place the induction coil at the position of the second annular groove 3, that is, the part where the inserted pipe fitting overlaps with the branch pipe 4, when the temperature of the branch pipe 4 and the inserted pipe fitting reaches the corresponding brazing temperature, For example, at 600°C-750°C, the solder 1 melts into a liquid. At this time, due to capillary action, the solder liquid penetrates into the weld, cools naturally, observes the quality of the weld, and completes the operation.

(2) When flame heating is used, the branch pipe 4 is heated to deep red, and the solder 1 melts into a liquid. At this time, due to capillary action, the solder liquid penetrates into the weld, cools naturally, observes the quality of the weld, and completes the operation.

The comparison between the present invention and traditional brazing, Nazi connection is as follows:

project this invention traditional brazing Nanoconnection strength powerful powerful weak tightness zero leakage zero leakage Easy to leak service life long long generally Labor Skill Requirements Low high high cost very low Low higher Operability Simple complex Simple Can it adapt to the automated production line can more difficult more difficult Can realize the hermetic connection of copper and other metals easy more difficult more difficult Is there an open flame No open flames when using induction heating Yes no

The invention can solve the welding of φ2-φ150 pipes, so that the interface between the connecting pipe fitting and the pipe fitting to be connected is completely sealed, without leakage, and has high strength; and by setting the welding device, the requirements for the labor skills of the operator are greatly reduced, and the The operation of the upper welding rod reduces the labor intensity and complexity; moreover, multiple welding ports can be operated at the same time, which is convenient for the factory automatic production line to weld copper pipes and copper alloys; the special pipe fittings of the present invention are simple to manufacture, low in cost, and far lower than Nano connection method, simple structure, easy to weld, can be widely used in the welding of copper pipes and copper pipes, copper pipes and metal pipes (may need to replace the solder material), copper pipes and other metal pipe fittings.

Claims (10)

1. a kind of copper pipe fast-connection pipeline, including a base tube（2）, it is characterised in that：The base tube（2）On be provided with can should Base tube（2）Welder together with being inserted into pipe fitting welding.

A kind of 2. copper pipe fast-connection pipeline according to claim 1, it is characterised in that：Welder is c-type structure Solder（1）, the solder（1）Equivalent diameter be 1-10mm.

A kind of 3. copper pipe fast-connection pipeline according to claim 1 or 2, it is characterised in that：Welder is arranged on base Pipe（2）The position of interior close end.

A kind of 4. copper pipe fast-connection pipeline according to claim 3, it is characterised in that：Base tube（2）Interior and solder（1）Phase Corresponding position, which is respectively arranged with, can accommodate solder（1）U-shaped section first annular groove（8）.

A kind of 5. copper pipe fast-connection pipeline according to claim 4, it is characterised in that：First annular groove（8）Outside The internal diameter of section compares base tube（2）The big 1-10mm of internal diameter, be most preferably 1-2mm.

A kind of 6. copper pipe fast-connection pipeline according to claim 2, it is characterised in that：The base tube（2）It is upper integrally to connect It is connected at least one internal diameter and is more than base tube（2）The branch pipe of internal diameter（4）, welder is arranged on branch pipe（4）Interior close middle part/end Position.

A kind of 7. copper pipe fast-connection pipeline according to claim 6, it is characterised in that：The branch pipe（4）Interior and solder （1）Corresponding position, which is respectively arranged with, can accommodate solder（1）U-shaped section the second annular groove（3）.

A kind of 8. copper pipe fast-connection pipeline according to claim 7, it is characterised in that：Second annular groove（3）Outside The internal diameter of section compares branch pipe（4）The big 1-10mm of internal diameter, be most preferably 1-2mm.

A kind of 9. copper pipe fast-connection pipeline according to claim 6, it is characterised in that：The branch pipe（4）Interior and solder （1）Corresponding position, which is respectively arranged with, can place solder（1）Horn mouth（5）.

A kind of 10. quick Joining Technology of copper pipe, it is characterised in that：Comprise the following steps：

Firstth, pipe fitting and branch pipe will be inserted into（4）Or base tube（2）Both are cleaned the part surface of contact, and solder flux is applied Smear to being inserted on pipe fitting；

Secondth, position to be welded is carried out being heated to corresponding brazing temperature；

3rd, welded using induction welding equipment or flame mode of heating.