JPH0650475A - Adapter for brazing copper pipe join - Google Patents

Abstract

PURPOSE:To provide a blazing adapter capable of enhancing the working efficiency, which is removably attached to a copper pipe joint so as to optionally select a solder to be used. CONSTITUTION:An elongated rod-like solder 9 is laid along a storage groove 7 which is concavely formed in the inner peripheral surface 5 of a ring 3 having an inner diameter substantially equal to that of the opening 41 of a joint 40, being directed radially outward. Further, an annular bead 13 is projected from the side surface 11 of the ring 3, having an inner diameter substantially equal to the outer diameter of the opening 41 of the joint 40. The ring 3 and the annular groove 13 are split at one position. An annular engaging part 13 of the adapter 1 is pushed in so as to be fitted onto the opening 4a of the joint 40, the split parts 15 are opened so as to allow the annular engaging part 13 to be fitted onto a joint part 43.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a brazing adapter used for brazing and joining an overlapping portion of a copper pipe joint and a copper pipe inserted in the copper pipe joint.

[0002]

2. Description of the Related Art Conventionally, a copper pipe joint has been used for joining copper pipes, the copper pipe is inserted into the copper pipe joint, and the overlapping portion of both is melted between the copper pipe and the copper pipe joint. Had been filled and joined. Skilled skills are required for complete brazing at the time of this joining, but especially when performing "soldering" at the site, the required amount of brazing material is the diameter of the copper pipe or copper pipe joint. Depending on the situation, an unfamiliar worker may run out of wax or use more brazing filler metal than necessary.

Therefore, there is also known a so-called "place brazing" technique in which a brazing material is attached to the copper pipe side or the copper pipe joint side in advance. In the case of this brazing filler metal, by previously mounting an appropriate amount of brazing filler metal according to the difference in the diameter of the copper pipe joint, there is no fear of the above-mentioned brazing shortage. Therefore, with respect to problems such as lack of wax, even an inexperienced worker can work with peace of mind.

In the case of the above-mentioned soldering, for example, one hand is used for holding the brazing filler metal and the other hand is used for heating with a burner or the like, so that both hands are closed. On the other hand, in the case of placing it, one hand is free, so there are various advantages in work.

[0005]

However, in the case of the "placed brazing" method described above, there is a problem that the brazing material is fixed and cannot be easily replaced. A specific inconvenience caused by this problem will be described by taking the case of step brazing as an example.

[0006] The step brazing is a method in which a plurality of points are not brazed at the same time, but are brazed at different times. For example, the workability is improved by first connecting the copper pipes to each other via a copper pipe joint to form a pipe kit and then connecting the pipe kit to the device body. In that case,
When brazing copper pipes and copper pipe joints, use a brazing filler metal with a relatively high melting point, and when brazing the piping kit to the equipment body, use a brazing filler metal with a relatively low melting point. To do. As a result, the parts of the copper pipe and the copper pipe joint that were brazed first will not be melted by the heating during brazing performed later.

As described above, when step brazing is performed, it is necessary to use a brazing material having a high melting point to heat the brazing material from the existing one to braze it. An appropriate brazing material is not always attached depending on the brazing order. for that reason,
If only the workability is considered and the piping kit is first created, and then the piping kit is heated to braze the equipment, the brazing material between the first brazed copper pipe and the copper fitting will melt. There is a possibility that it will end up.

Therefore, in order to prevent the melting of the brazing filler metal, it is necessary to perform brazing in consideration of the high melting point of the brazing filler metal which is attached in advance. For example, all the brazing filler metals have the same melting point. If brazing material is used, step brazing is not possible. In that case, it is necessary to perform brazing at a time with all the parts assembled, resulting in a narrow working space and the need for multiple people to work at the same time. It gets worse.

Therefore, in the present invention, the brazing material to be used can be freely selected by making it attachable to and detachable from the copper pipe joint. For example, when performing step brazing in consideration of workability, the brazing material is brazed. An object of the present invention is to provide a brazing adapter for a copper pipe joint, which can select an appropriate brazing material according to the order and can also improve work efficiency.

[0010]

A brazing adapter for a copper pipe joint according to the present invention made to achieve this object includes:
An adapter used when brazing and joining an overlapping portion of a copper pipe joint and a copper pipe inserted into the copper pipe joint, the ring having an inner diameter substantially equal to the inner diameter of the opening of the copper pipe joint, A storage groove formed in a radial direction from the inner peripheral surface of the ring, in which a brazing material is placed, and an inner diameter that is erected from the side surface of the ring and is approximately equal to the outer diameter of the copper pipe joint opening. And an annular engaging portion having.

[0011]

According to the brazing adapter of the copper pipe joint of the present invention, when the copper pipe is inserted into the adapter and the copper pipe joint with the annular engaging portion of the adapter fitted onto the opening of the copper pipe joint. Since the inner diameter of the ring is almost equal to the inner diameter of the opening of the copper pipe joint, the brazing material arranged in the storage groove is located opposite to the outer peripheral surface of the copper pipe. Then, the brazing filler metal that is heated and melted flows along the outer peripheral surface of the copper pipe to the overlapping portion of the copper pipe and the copper pipe joint, and fills the gap between the two, so that brazing is performed.

Since this brazing adapter can be freely attached to and detached from the copper pipe joint, it is possible to prepare an adapter in which various brazing materials are arranged in the housing groove and to use an appropriate one. Therefore, at the work site, work efficiency can be improved by attaching an adapter with an appropriate brazing material and brazing and joining it according to the effective step brazing order when workability is considered based on the actual work content. Can be achieved.

[0013]

EXAMPLES Examples of the present invention will be described below. FIG. 1 is a partial cross-sectional perspective view of a brazing adapter (hereinafter also simply referred to as an adapter) 1 of this embodiment. The adapter 1 is used when the copper pipe 30 is inserted into a copper pipe joint (hereinafter also simply referred to as a joint) 40 and the overlapping portions of the both are brazed and joined. Openings 4 at both ends of this copper pipe joint 40
From 1 (only one is shown in the figure) to a predetermined distance inward, a joint portion 43 having a slightly enlarged diameter is formed.
Has an inner diameter slightly larger than the outer diameter of.

Incidentally, as will be described later,
At the position of about two-thirds of the total length of the joint from the opening 41,
The monitoring holes 45 connecting the outside and the inside are 2 at intervals of about 180 degrees.
One is provided. On the other hand, the inner side of the joint portion 43 is made substantially equal to the inner diameter of the copper pipe 30 to prevent the copper pipe 30 from further inward, and the inner surface of the copper pipe 30 and the inner surface of the joint 40 are The running water is smooth after the connection because they are almost equal.

The adapter 1 comprises a ring 3 having an inner diameter approximately equal to the inner diameter of the opening 41 of the joint 40. The inner peripheral surface 5 of the ring 3 is provided with a storage groove 7 formed in a concave shape toward the outer side in the radial direction over the entire circumference. Inside the storage groove 7, a brazing material 9 in the form of an elongated rod is provided. It is arranged along the storage groove 7.

From one side surface 11 of the ring 3,
An annular engaging portion 13 having an inner diameter substantially equal to the outer diameter of the opening 41 of the joint 40 is provided upright. In this embodiment, the periphery of the inner peripheral edge of the annular engaging portion 13 is tapered as shown in FIG. 2 (A). Further, one portion of the ring shape is divided through the ring 3 and the annular engaging portion 13. The inner diameter of the annular engaging portion 13 when the dividing portion 15 is closed is such that the above-mentioned tapered portion has the joint opening 4
It is preferable to set the inner diameter of the joint opening 41 to be slightly larger than the outer diameter of the joint opening 41 and slightly smaller than the outer diameter of the joint opening 41.

Next, the operation of this adapter will be described according to the procedure for brazing the copper pipe 30 and the joint 40. First, the adapter 1 is attached to the joint 40. In this case, the annular engaging portion 13 of the adapter 1 is connected to the opening 4 of the joint 40.
From the 1 side, press it so that it fits on the outside. Annular engaging portion 13
Since the inner diameter of the tapered portion is slightly larger than the outer diameter of the opening portion 41, if it is pushed in slightly, the edge of the opening portion 41 and the tapered portion of the annular engaging portion 13 slide and the divided portion. 1
5 is opened, and the annular engaging portion 13 can be fitted onto the joint portion 43.

In this way, after the adapter 1 is set in the joint 40, the copper pipe 30 is inserted into the adapter 1 and the joint 40. When the tip of the copper tube 30 reaches the end of the joint portion 43, the inside is further made substantially equal to the inner diameter of the copper tube 30, so that the copper tube 30 does not enter further inward. This state is shown in the sectional view of FIG.

Since the inner diameter of the ring 3 is substantially equal to the inner diameter of the opening 41 of the joint 40, the brazing material 9 arranged in the storage groove 7
Is located so as to face the outer peripheral surface of the copper tube 30.
After setting the copper tube 30, the joint 40, and the adapter 1 in this manner, the joint portion is heated by a burner (not shown) or the like to melt the brazing material 9. FIG. 2B shows a state in which the brazing material 9 is melted. As shown in FIG. 2 (B), the brazing filler metal 9 which is heated and melted flows along the outer peripheral surface of the copper pipe 30 to the overlapping portion of the copper pipe 30 and the joint portion 43 of the joint 40, and between them. Fill the gap. As a result, brazing is performed.

Since the adapter 1 of this embodiment can be freely attached to and detached from the joint 40, it is possible to prepare an adapter 1 having various brazing filler metals 9 arranged in the storage groove 7 in advance and use an appropriate one. it can. Therefore, at the work site, the work efficiency can be improved by attaching the adapter 1 in which an appropriate brazing material 9 is arranged and brazing and joining in accordance with the effective step brazing order in consideration of workability based on the actual work content. Can be improved. That is, the earlier the step brazing order is, the more the adapter 1 in which the brazing material 9 having a higher melting point is arranged is used.

A monitoring hole 45 provided in the joint portion 43
From the inside, it is possible to determine whether or not the copper tube 30 is inserted into the joint 40 by the required length. As described above, since the monitoring hole 45 is provided at a position about two-thirds of the total length of the joint from the opening 41,
When the copper pipe 30 is assembled to the joint 40, if the copper pipe 30 can be seen through the monitoring hole 45, it means that the copper pipe 30 is inserted in about two-thirds or more of the total length of the joint. Therefore, since the insertion length is short, the strength is lowered, and the risk of breakage and water leakage can be easily checked.

If the molten brazing filler metal 9 can be seen through the monitoring hole 45, it can be seen that the brazing filler metal 9 has sufficiently flowed into the overlapping portion of the copper pipe 30 and the joint 40. Therefore, if heating is performed while checking the brazing filler metal 9 from the monitoring hole 45, even an inexperienced worker can perform work without worrying about brazing failure due to insufficient heating. In this embodiment, the monitoring hole 45 is set to 180
Two are provided at intervals, but in one case, it is conceivable that the side on which the monitoring hole 45 is provided is properly flowing, but the opposite side is not. The number of the monitoring holes 45 is not limited to two, but may be more than two.
It seems that the appropriate degree is appropriate.

The present invention is not limited to the embodiments described above, and can be carried out in various modes without departing from the scope of the present invention.

[0024]

According to the brazing adapter for a copper pipe joint of the present invention described above, since it is detachable from the copper pipe joint, an adapter in which various brazing materials are arranged in the storage groove is prepared in advance. If this is done, an appropriate one can be used with easy installation work. Therefore, at the work site, according to the effective step brazing sequence when considering workability based on the actual work content, if an adapter with an appropriate brazing material is attached and brazing is performed, the work efficiency can be improved. It has an extremely excellent effect that it can be improved.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional perspective view of a brazing adapter of this embodiment.

FIG. 2A is a sectional view showing a state in which a copper pipe, a copper pipe joint, and an adapter of this embodiment are assembled, and FIG. 2B is a sectional view showing a state in which brazing is completed.

[Explanation of symbols]

1 ... Adapter, 3 ... Ring, 5 ...
Inner peripheral surface, 7 ... storage groove, 9 ... brazing material,
11 ... Side surface, 13 ... Annular engagement part, 15 ... Dividing part, 30 ... Copper pipe, 40 ... Copper pipe joint, 4
1 ... Opening part, 43 ... Joining part, 45 ... Monitoring hole

Claims (1)

[Claims] 1. An adapter used for brazing and joining an overlapping portion of a copper pipe joint and a copper pipe inserted into the copper pipe joint, the adapter having an inner diameter substantially equal to an inner diameter of an opening of the copper pipe joint. A ring that has a ring, a storage groove that is formed in a concave shape in the radial direction from the inner peripheral surface of the ring, and in which a brazing material is arranged, and that is erected from the side surface of the ring and that is outside the opening of the copper pipe joint. An adapter for brazing a copper pipe joint, comprising: an annular engaging portion having an inner diameter substantially equal to the diameter.