JP2001050465A - Electro-fusion joint - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform proper fusion regardless of a power supply capacity in an execution field by arranging a plurality of bar codes for outputting substantially same fusion energy with differential information. SOLUTION: By an electro-fusion joint 10, a resin pipe 12 and a resin pipe 14 made of a thermoplastic resin such as polyethylene and polybutene are connected to each other. The electrofusion joint 10 is provided with a cylindrical joint main body 16 made of the same thermoplastic resin as the resin pipes 12, 14. Receiving ports for receiving the resin pipes 12, 14 are formed on both end parts of the joint main body 16, and a coil shaped heating body is disposed in the vicinity of an inner surface. The both end pats of the heating body are connected to joint terminals 18a, 18b protruded and formed to an outer peripheral surface of the joint main body 16. A bar code display part 20 is formed on an outer peripheral surface of the joint main body 16. The bar code display part 20 is provided with bar codes 20a, 20b.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrofusion joint.
In particular, it relates to an electric fusion joint such as a polyethylene pipe or a polybutene pipe for gas or water supply.

[0002]

2. Description of the Related Art In a conventional electrofusion joint of this type, information relating to energization of a heating element provided in a joint body is input to a barcode, and a single barcode is attached to the joint body itself, or the joint is connected to the joint body itself. Is written on a separate card.

[0003] As bar code information, ISO 138 is used.
/ SC5 Based on the proposed 24-digit barcode standard of N1396, it is general-purpose. In the barcode information, information on energization such as an output voltage value (in the case of constant voltage control) or a current value (in the case of constant current control), a resistance value, a fusion time, an output correction coefficient, and the like are input.

When the joints are fused, a method of reading a bar code with a bar code reader or the like and controlling energization by a controller to perform the fusion is widely used.

[0005]

In the prior art, there was only one bar code. For example, if this bar code information indicates that the resistance R is 0.8Ω and the output voltage V is 4
When the fusion time T is 0 seconds and the fusion time T is 350 seconds, the electric power W required for the fusion is W = V2 / R = 40 × 40 / 0.8 = 2
000 (W), and the electric energy (fusion energy) P is P
= W × T = 2000 × 350/3600 = 194 (W
h).

At this time, at least 20 generators or commercial power sources (hereinafter simply referred to as “power sources”) at the construction site are used.
Fusion can be performed without any problem as long as it can output 00 W. For example, if only a 1500 W power supply is provided, fusion cannot be performed with this barcode.

In this case, it is not preferable in terms of cost to newly purchase or prepare a power supply having a large power supply capacity.

[0008] In order to be compatible with only a small output power source, the bar code information having a small output power and a correspondingly long fusion time is required when a power source having a large power source capacity is provided at the construction site. This has not been done due to inefficiency and long construction times.

[0009] Therefore, a main object of the present invention is to provide an electric fusion joint capable of performing appropriate fusion regardless of the power supply capacity at a construction site.

[0010]

SUMMARY OF THE INVENTION The present invention is an electrofusion joint having a plurality of barcodes that can output different information and substantially the same fusion energy.

[0011]

In order to perform proper fusion, proper power and fusion time, that is, proper fusion energy are required. In the case of low power, this fusion energy is obtained, for example, by lowering the output voltage and extending the fusion time. Therefore,
Barcode information for high-power, short-time fusion conditions and barcode information for low-power, long-time fusion conditions,
A plurality of barcodes capable of outputting different information and substantially the same fusion energy are attached to the joint body or are written on a card separate from the joint.

For example, when the amount of electric power (fusion energy) required for proper fusion of the electrofusion joint is about 194 Wh, the output power is 2 to output this fusion energy.
A bar code having high-output short-time bar code information inputting fusion conditions of 000 W (resistance 0.8 Ω, output voltage 40 V) and fusion time of 350 seconds;
A bar code having low output / long time type bar code information inputting fusion conditions of 280 W (resistance 0.8 Ω, output voltage 32 V) and fusion time is 547 seconds is attached to the joint body.

[0013]

According to the present invention, since a plurality of barcode information having different information is provided as fusion conditions for outputting substantially the same fusion energy, regardless of the magnitude of the power supply capacity at the construction site. And proper fusion can be performed.

The above objects, other objects, features and advantages of the present invention will become more apparent from the following detailed description of embodiments with reference to the drawings.

[0015]

Referring to FIG. 1, an electric fusion joint 10 of this embodiment is for connecting a resin pipe 12 and a resin pipe 14 made of a thermoplastic resin such as polyethylene or polybutene.

The electric fusion joint 10 has a tubular joint body 1 made of the same thermoplastic resin as the resin pipe 12 and the resin pipe 14.
6 inclusive. Receptacles for receiving the resin pipe 12 and the resin pipe 14 are formed at both ends of the joint main body 16, and a coil-shaped heating element is provided near the inner surface thereof. Both ends of the heating element are connected to joint terminals 18 a and 18 b formed to protrude from the outer peripheral surface of the joint body 16. Further, a bar code display section 20 is formed on the outer peripheral surface of the joint body 16.

The bar code display section 20 includes bar codes 20a and 20b, as can be clearly seen from FIG. These are barcode information for outputting fusion energy required for proper fusion in this embodiment, and are ISO 1
Information such as an output voltage value, a resistance value, a fusion time, and an output correction coefficient is input based on a 24-digit barcode standard draft of 38 / SC5 N1396. The welding conditions at a standard temperature of 20 ° C. are input as standard values, and when power is supplied, the temperature difference and the output correction coefficient are output in consideration of the temperature difference between the actual temperature and the standard temperature. Is corrected.

In this embodiment, as shown in FIG. 2, a bar code 20a and a 1.5k
The bar code 20b for W is formed. Electric fusion joint 1
Assuming that the resistance value R of 0 is 0.8Ω and the electric power (fusion energy) P required for proper fusion is about 222 Wh, the bar code 20a has an output voltage value Va of 40 V and a fusion time Ta. Of the high-power / short-time type fusion condition of 400 seconds is input to the bar code 20b, and the low-power / long-time fusion type with the output voltage value Vb of 32 V and the fusion time Tb of 625 seconds Condition information is entered. In this case, bar code 2
Under the fusion condition of 0a, the output power Wa is 2000W, while under the fusion condition of the barcode 20b, the output power Wb is 1280W. Here, the output voltage values Va and Vb are set to values that can be output by the controller 22.

In the fusing condition of the bar code 20b, since the fusing time is longer than the fusing condition of the bar code 20a, an amount of escape heat which is not effectively used for fusing is generated.
It is necessary to take this into account in the output correction coefficient.

When using the electric fusion joint 10,
The ends of the resin pipe 12 and the resin pipe 14 are fitted into the sockets at both ends. Then, the power cable 24 of the controller 22 is connected to the power source 26, and the power source 26 is turned on to start up. Then, the connection terminals 30a and 30b of the output cables 28a and 28b extending from the controller 22 are connected to the joint terminals 18a and 18b, respectively.

Thereafter, the bar code display section 20 of the electrofusion joint 10 is read by a bar code reader 32 connected to the controller 22 and energized.
When the power capacity of the power supply 6 is 2.5 kW, the bar code 20a for 2.5 kW is read, and when the power capacity of the power supply 26 is 1.5 kW, the bar code 20b for 1.5 kW is read.
Then, the start switch of the controller 22 is operated to start energization. The energization is automatically controlled by the controller 22 based on the read information, and fusion is performed.

According to this embodiment, a bar code 20a of a high-output short-time fusion condition and a bar of a low-output long-time fusion condition for outputting substantially the same fusion energy are provided. Since the cord 20b is formed in the joint body 16, the power supply capacity at the construction site is small (1.5 kW in this case).
(1) Even when only the power supply is provided, proper fusion can be performed by using the barcode 20b corresponding to the power supply.

In this embodiment, the bar code 20a
And 20b are formed in the fitting body 16, but this may be noted on a card separate from the fitting.

Further, in the above embodiment, the case of the socket is shown, but the present invention can be applied to other electric fusion joints such as saddles.

Further, in the above-described embodiment, two bar codes 20a and 20b are formed assuming two types of power supplies for 2.5 kW and 1.5 kW.
The type of power supply is not limited to this, and three or more bar codes may be provided so as to be usable for three or more types of power supplies.

[Brief description of the drawings]

FIG. 1 is a schematic view showing a use state of an embodiment of the present invention.

FIG. 2 is an illustrative view showing a barcode of the embodiment in FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Electrofusion joint 16 ... Joint body 18a, 18b ... Joint terminal 20 ... Barcode display part 20a, 20b ... Barcode

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Masato Hioki 64 Ishizu-Kitamachi, Sakai City, Osaka, Japan Inside the Kubo Tavinyl Pipe Factory (72) Inventor Naoto Okazaki 64, Ishizukita-machi, Sakai City, Osaka Inside Kubo Tavinyl Pipe Factory F Terms (reference) 3H019 GA02 JA02 4F211 AP20 AR11 AR16 TA01 TC11 TN31

Claims (1)

[Claims] An electrofusion joint having a plurality of barcodes capable of outputting different information and substantially the same fusion energy.