JPH0737732B2 - Piping structure of water pipe and its piping construction method - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a pipe structure for a water pipe and a pipe construction method, and an object thereof is to use a plurality of same or different materials containing lead when constructing a water pipe. The present invention provides a pipe structure and a pipe construction method for connecting water pipes to each other safely, reliably and promptly.

More specifically, the end of the lead pipe is made thicker to make a tsuba, and it is made by screwing the male screw with the tsuba and the pipe joint, so that piping work can be done safely, reliably and quickly without requiring any skill,
Even if the loosening of the screw occurs over time, the loosening direction of the male screw with the collar will be the tightening direction of the male screw with the other flange, so the loosening of the screw between the male screw with the collar and the pipe joint will not occur. In addition, the other pipe connected to the lead pipe through a pipe joint may be the same or different in diameter as the lead pipe, or may be a pipe made of a different material other than lead, and may be a water pipe other than metal, which is versatile. To provide a piping structure and a piping construction method therefor.

(Prior Art) Conventionally, when a water pipe, particularly a water lead pipe, is connected to a pipe joint by a hot method.

This hot method will be described with reference to FIG. 8. First, the end (b) of the water pipe (a) is tapped with a tampon having a conical tip,
This end portion (b) is spread thinly in a trumpet shape.

The pipe joint (c) is joined to the trumpet-shaped end portion (b). In this joining, the conical end portion (d) of the pipe joint is inserted into the trumpet-shaped end portion (b). , The solder (e) was poured into the part and joined.

On the other hand, there is a technique for water pipes and sewer pipes, particularly pipes other than lead pipes, such as "Pipe joint with flange and locking pipe" disclosed in JP-A-62-9086.

This technique will be described with reference to FIG. 9. First, a washer (z) and a nut (f) are inserted into one end (b) and a washer (z) and a nipple (h) are inserted into the other end (g). Then, the flanges (e) are formed on the ends (b) and (g) of the respective water pipes (a) (i), and the nuts (f) and the nipples (h) are screwed together and connected.

(Problems to be Solved by the Invention) However, each of the above methods has defects.

First, the hot method had the following problems.

That is, if the end portion of the water supply lead pipe (a) is tapped with a tampon to form a trumpet shape, the trumpet-shaped end portion (b) is inevitably thinned and the strength is reduced. Water pipe (a)
In order to solder at the joint between the pipe and the pipe joint (c), a method of pouring the solder into this joint while heating the place with a torch lamp was used. It was necessary, and required considerable skill.

Therefore, if an unskilled person performs this joining work, the soldering will be inadequate and the joining will be poor, and burns during the work,
There was a problem that it took time to complete the joining work.

This is a big problem especially in recent years when the number of skilled workers for soldering torch lamps is decreasing.

Further, the method disclosed in JP-A-62-9086 has the following defects.

That is, since the end of the water pipe (a) is spread to form the brim (e), the wall thickness of the material at the boundary between the brim (e) and the water pipe (a) becomes thin and becomes brittle. When used, it caused damage to the joint and caused water leakage and water breakage.

Furthermore, this technique has a drawback that it cannot be applied to a synthetic resin pipe such as a PVC pipe that cannot be plastically deformed, or a soft water pipe having no hardness such as a lead pipe.

In addition, when joining water pipes of different metal materials, different metals are directly abutted against each other, so that the joining surfaces of the metals come into direct contact with each other over time, and as a result, a metal battery is generated on the contact surface. As a result, the water pipe deteriorated, causing water leakage and water rupture.

Also, when joining water pipes of the same kind of metal material,
Since the joint is a nut and a nipple, the screwing may be loosened due to vibrations, etc. The loosening of the screwing causes water leakage or water breakage.

(Means for Solving the Problem) The present invention comprises a plurality of water pipes of the same kind or different materials containing lead, a male screw member with a collar, and a pipe joint in which a male screw is engraved at a joint end portion. A ring-shaped collar is formed at the end of the flange, the male screw member with a collar is previously inserted into this water pipe via a leaf, and at least one joint part of the pipe joint is fitted to the male screw member with a collar via a packing. Of the water pipe piping structure that is screwed together and a plurality of water pipes of the same or different materials containing lead, insert a male screw member with a collar next to the leaf in advance on the outer periphery of the lead pipe, and then split it in half. With a semi-cylindrical body with a step, a shaft connecting them, a projecting piece, a set screw, and a tightening nut, a flange forming machine, and a metal rod-shaped jig in which a large diameter portion and a small diameter portion are connected in series. A semi-cylindrical body for the collar-modeling machine, using a tampon whose shoulder is the bottom of the large diameter part. Close the end of the plumbing tube, put the set screw down between the protrusions, tighten the tightening nut to project the end of the plumbing tube by an appropriate length from the tip of the collar molding machine, and tap the small diameter part of the tamping pin. Insert it into the lead pipe, hit the shoulder to this lead pipe edge and tap the rear end of the large diameter part of the tamping pin with a mallet to shape it into a ring-shaped brim, and at one joint part of the pipe joint, the leaf and the previous term. The male screw member with a collar is abutted and screwed through the packing with packing, sandwiching the collar, and if the other water pipe is other than the lead pipe, the flange is formed by a method such as joining via the leaf to form another flange. In the case of a lead pipe, the above problem is solved by a pipe construction method of a water pipe in which a ring-shaped brim is formed via a leaf in the same manner as described above, and the remaining joint portion and another water pipe are joined.

(Operation) That is, when at least one of the water pipes is a lead pipe when the water pipe is piped, a ring-shaped brim is formed at the end of the lead pipe to be joined to the pipe joint. Therefore, compared to making the end of the plumbing tube into a trumpet shape or expanding the end to form the brim, the material is not made thinner but the end is thickened to make the brim, so the joint does not become brittle. The joint is not damaged, there is no risk of water leakage or water breakage, and the strength is excellent.

Since the lead pipe and the pipe joint are joined by screwing the male screw with a collar and the pipe joint without using solder, the piping work can be performed safely, reliably and quickly without the need for skill, and the screw is economical. Even if the loosening of the collar is about to occur, the loosening direction of the one male screw with the collar is the tightening direction of the other male screw with the collar, so that the male screw with the collar and the pipe joint are not loosely screwed.

The other pipe connected to the lead pipe through a pipe joint may be the same or different in diameter as the lead pipe, or may be a pipe made of a different material other than lead, and may be a water pipe other than metal, which is highly versatile.

Moreover, since the male screw member with the collar and the collar of the water pipe are joined via the leaf, and the male screw member with the collar and the pipe joint are joined via the packing, the water pipe to be joined is a different member. Also, the material of the leaf that can prevent the establishment of the metal battery,
Since the material of the joint can be selected, different types of water pipes do not come into direct contact with each other to form a metal battery and prevent metal corrosion.

(Example) The piping structure of the water pipe and the piping construction method according to the present invention will be described below with reference to the drawings.

FIG. 1 shows a first embodiment of the piping structure of the water pipe.

This piping structure comprises at least one lead pipe (1) constituting a water pipe, a male screw member (2) with a collar, and a pipe joint (3).

In this first embodiment, the inner diameter of the other pipe (4) constituting the water pipe is different from that of the lead pipe (1) (in this example, it is larger than the lead pipe (1)).

Further, although the pipe (4) is a lead pipe in this example, it may be a pipe made of a material other than lead.

A ring-shaped collar (5) is formed at the end of the lead tube (1).

Further, in this example, the other pipe (4) is also a lead pipe,
As with the lead tube (1), a collar (6) is formed.

A male screw member (2) with a collar is inserted through the outer circumference of the lead tube (1).

The male screw member (2) with a collar has a collar portion (7) and a screw member (8).
And a male screw (8a) is engraved on the outer periphery of the screw portion (8).

In this example, the flanged male screw member (9) is also inserted into the outer circumference of the other pipe (4).

In this first embodiment, the pipe joint (3) is a joint portion (1
It is a socket joint having 0) and (11).

The joint part (10) has a small diameter and the joint part (11) has a large diameter.
Male screws (10a) and (11a) are engraved on the inner circumference of the lead pipe (1), which are screwed with the male screw members (2) and (9) with the collar by these male screws (10a) and (11a). ) And the other pipe (4) are connected to the pipe joint (3).

In addition, the male screw members (2) and (9) with the collar and the collar (5),
The pipe of (6) has a leaf (12), and a collar (5), (6).
A packing (13) is interposed between and the central flange inside the pipe joint (3).

Next, a method of constructing the water pipe structure as described above will be described with reference to FIGS. 2 (A) to (D).

However, in this example, the other pipe (4) is also a lead pipe.

First, as shown in FIG. 2 (A), the lead pipes (1) and (4) having different diameters are provided on the outer circumference of the male screw member (2) with the collar.
Insert (9).

At this time, also insert the leaf (12). For the material of the leaf (12) and the material of the pipe joint (3), materials that do not corrode due to the metal battery may be adopted in consideration of the materials of the lead pipe and other water pipes.

Next, as shown in FIGS. 2 (B) and (C), a collar (5) is formed at the end of the lead tube (1).

To form this tsuba (5), the present inventor has
The brim molding device (16) and the tampon (17) disclosed in Japanese Patent No. 44955 are used.

As shown in FIG. 7 (A), the collar part molding machine (16) includes a half-cylindrical body (18) (18) divided into two parts, a pivot (19) connecting these, a projecting piece (20), and a set screw ( 21) and tightening nut (22).

The semi-cylindrical body (18) (18) has a step (23) formed therein.

The tampon (17) is a metal rod-shaped jig in which a large diameter portion (24) and a small diameter portion (25) are connected to each other, and the bottom surface of the large diameter portion (24) is a shoulder portion (26).

The diameter of the small diameter portion (25) is substantially the same as the inner diameter of the lead pipe.

To carry out the collar forming work, as shown in FIG. 7 (B), the semi-cylindrical bodies (18) (18) of the collar part molding machine (16) are closed and the vicinity of the end of the lead tube (1) is sandwiched, Set screw (21) to protrusion (20)
And tighten the tightening nut (22).

In this state, the end portion of the lead tube (1) is made to protrude from the tip of the collar part molding machine (16) by an appropriate length.

Next, as shown in FIG. 2 (B), the small diameter portion (25) of the tampon (17) is inserted into the lead pipe (1), and the shoulder portion (26) is applied to the edge of this lead pipe (1).

Hit the rear end of the large diameter part (24) of the tampon (17) with a hammer.

Since the lead pipe is soft and easily deformed, the lead pipe is compressed between the shoulder portion (26) of the tamping pin (17) and the step portion (23) of the brim molding device (16) to be molded into a ring-shaped brim (5). (Figure 2 (C)
reference).

The formation of the collar (6) on the other pipe (4) is also performed by the above method.

After that, the small diameter joint portion (10) of the pipe joint (3) (socket joint) is screwed into the male screw member (2) with a flange on the outer circumference of the lead pipe (1) to form a large diameter joint portion (11). Is screwed onto the male screw member (9) with a collar of the pipe (4). At this time, packings (13) and (13) are interposed between the lead pipe (1), the pipe (4) and the pipe joint (3).

The pipe (4) may be other than a lead pipe, in which case the pipe (4)
And the joint portion (11) of the pipe joint (3) are joined by screwing the male screw engraved on the outer periphery of the pipe (4) with the pipe joint (3), the pipe (9) and the pipe joint (3). It is joined by an appropriate method according to the material of the tube, such as adhesion with.

FIG. 3 shows a second embodiment of the piping structure of the water pipe according to the present invention.

In this embodiment, a T-joint branched in three directions is used as the pipe joint (3). In this embodiment, one joint portion (10) has a different diameter T smaller than the remaining joint portions (11) and (11). It is used as a joint. Of course, the joint portion (10) may have a larger diameter and the joint portions (11) and (11) may have a smaller diameter. The lead pipe (1) is joined to the joint portion (10) of the pipe joint (3), and the pipe portions (4) and (4) other than the lead pipe (1) are connected to the joint portions (11) and (11). Lead pipe in the example) is joined.

A ring-shaped collar (5) is formed at the end of the lead tube (1),
A male screw member (2) with a collar (similar to the first embodiment) is inserted through the outer circumference of the lead tube (1).

A leaf (12) is interposed between the male screw member (2) with a collar and the collar (5), and a packing (13) is interposed between the collar (5) and the flange inside the pipe joint (3). Has been done.

In this example, as described above, a lead pipe (lead pipe having a diameter larger than that of the lead pipe (1)) is joined to the joint portion (11) (11) as the other pipe (4) (4). It is similar to that of the joint part (10) and the lead pipe (1).

Next, the construction method of the piping structure according to the second embodiment will be described with reference to FIGS. 4 (A) and 4 (B). First, the lead pipe (1) and the other pipe (4) (4) are formed on the outer circumference. The male screw member (2) (9) and the leaf (12) with a collar are inserted.

After that, the flanges (5), (6) and (6) are attached to the ends of the pipes (1), (4) and (4) by the flange forming machine (16) and the tampon (17).
To form.

A male screw member (2) with a collar on the outer circumference of the lead pipe (1) is screwed into a joint portion (10) of the pipe joint (3), and a male screw with a collar on the outer circumference of the other pipes (4) and (4). Screw member (9) (9)
And the joint parts (11) and (11) by screwing.

At this time, packings (13) are interposed between the pipes (1), (4) and (4) and the flange inside the pipe joint (3).

In this example, lead pipes are used as the other pipes (4) and (4), but pipes made of a material other than lead may be used as in the first embodiment, and a large-diameter joint portion ( 11), (11)
The pipe to be joined to the lead pipe (1) (1) and the pipe to be joined to the small diameter joint portion (10) may be the lead pipe (1) or the other pipe (4) other than (1) (not shown). No).

FIG. 5 shows a third embodiment of the piping structure of the water pipe according to the present invention.

In this embodiment, the other pipe (4) facing the lead pipe (1) has the same diameter as the lead pipe (1), and the pipe joint (3) has the same joint portions (14) and (14) as each other. A diameter socket joint is used.

The joint structure between the lead pipe (1) and the pipe joint (3) in this embodiment is the same as in the first and second embodiments.

Further, in this example, the other pipe (4) is a lead pipe, but a pipe other than the lead pipe can be adopted for this as well as the above-described embodiments.

The construction method of the pipe structure of the water pipe according to the third embodiment is the same as that of the first and second embodiments, and first, the male screw members (2) and (2) with the collar and the leaves (12) and (12). Through the outer circumference of each tube (1), (4) (see FIG. 6 (A)),
Collars (15) and (15) are formed at the ends of the pipes (1) and (4) (see FIG. 6 (B)), and thereafter, the joint portions (14) and (14) of the pipe joint (3). ) Is screwed onto the male screw members (2) and (2) with a collar (a packing (13) is interposed between the collars (15) and (15) of the pipes (1) and (4)).

(Effects of the Invention) The present invention comprises a plurality of water pipes of the same or different materials containing lead, a male screw member with a collar, and a pipe joint, and at least one of the water pipes is a lead pipe. A ring-shaped brim is formed at the end, the male screw member with a collar is inserted into the outer circumference of this lead pipe, and at least one joint part of the pipe joint is screwed into the male screw member with a collar at the outer circumference of the lead pipe, and the rest is left. The pipe part of the water pipe in which the joint part is joined to a pipe other than the lead pipe and the outer periphery of the lead pipe are previously inserted with a male screw member with a collar, and a ring-shaped collar is formed at the end of the lead pipe to form a pipe joint. One joint part is screwed with the male screw member with a collar sandwiching the collar, and the remaining joint part is joined to a pipe other than the lead pipe, which is a construction method of a piping structure of a water pipe, so that the following effects are obtained. .

That is, when at least one of the water pipes is a lead pipe during the piping of the water pipe, a ring-shaped brim is formed at the end of the lead pipe to join the pipe joint. Compared with making the end part a trumpet shape or spreading the end to form the brim, the material is not made thinner, but the end part is made thicker to make the brim, so the joint does not become brittle and therefore the joint is damaged. It is excellent in strength with no risk of water leakage or water breakage.

Since the lead pipe and the pipe joint are joined by screwing the male screw with a collar and the pipe joint without using solder, the piping work can be performed safely, reliably and quickly without the need for skill, and the screw is economical. Even if the loosening of the collar is about to occur, the loosening direction of the one male screw with the collar is the tightening direction of the other male screw with the collar, so that the male screw with the collar and the pipe joint are not loosely screwed.

Further, according to the present invention, the other pipe connected to the lead pipe through a pipe joint may have the same diameter as or different diameter from the lead pipe or a pipe made of a different material other than lead, and may be a water pipe other than metal in particular. Versatile.

Moreover, since the male screw member with a collar and the flange of the water pipe are joined via the leaf, and the male screw member with a collar and the pipe joint are joined via packing, the leaf material and the pipe joint material are joined together. Since it is determined in consideration of the material of the required water pipe, even if the water pipes to be joined are different members, the different water pipes do not come into direct contact with each other to form a metal battery and cause metal corrosion.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a first embodiment of the pipe structure for a water pipe according to the present invention, and FIGS. 2 (A) to (D) are cross-sectional views showing respective steps of a method for constructing the pipe structure of the same. Is a sectional view of a second embodiment of the piping structure of the water pipe according to the present invention, FIG. 4 (A)
(B) is a cross-sectional view showing each step of the method for constructing the above piping structure, FIG. 5 is a cross-sectional view of the third embodiment of the water pipe piping structure according to the present invention, and FIGS. 6 (A) and (B) are Same as above, which is a cross-sectional view showing each step of the construction method of the piping structure, FIG. 7 (A) is a perspective view of a collar part molding machine that forms a collar on the lead pipe, and FIG. 7 (B) is the same as above FIG. 8, FIG. 8 and FIG. 9 are cross-sectional views showing a conventional pipe joining structure. (1) …… Lead tube, (2) …… Male screw member with collar (3) …… Pipe joint, (4) …… Other tube (5) (6) (15) …… Temperature, (10) ( 11) (14) …… Joint part

Claims (2)

[Claims] 1. A water pipe of the same kind or different materials containing lead, a male screw member with a collar, and a pipe joint in which a female screw is engraved at the joint end, and the end of the water pipe has a ring shape. A flange is formed, the male screw member with a collar is previously inserted into this water pipe via a leaf, and at least one joint portion of the pipe joint is screwed to the male screw member with a collar via a packing. Piping structure. 2. A semi-cylinder having a plurality of water pipes of the same kind or different kinds of materials containing lead, the male screw member with a collar being previously inserted through the leaf on the outer circumference of the lead pipe, and then having a step portion in half. A metal rod-shaped jig consisting of a body, a pivot connecting them to each other, a protrusion, a set screw and a tightening nut, and a large-diameter part and a small-diameter part connected to each other. Using the tampon which is used as the part, close the semi-cylindrical body of the collar part shaper and pinch the vicinity of the end of the lead pipe, tilt the set screw between the projecting pieces, tighten the tightening nut and tighten the end of the lead pipe appropriately. Only the length of the flange part protrudes from the tip of the modeler, insert the small diameter part of the tampin into the lead pipe, hit the shoulder part to the edge of this lead pipe, and hit the rear end of the large diameter part of the tampin with a mallet or the like to form a ring shape. A flanged male screw member is formed on the flange by sandwiching the leaf and the collar at one joint part of the pipe joint, and the pipe joint and packing are inserted. Butt and screw them together, and if the other water pipe is other than the lead pipe, form a collar with a method such as joining via a leaf. A pipe construction method for forming a tsuba and joining the remaining joints with other water pipes.