JPH0338555Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a pipe joint cover (hereinafter referred to as a joint cover) used for corrosion protection of a pipe joint.

[Conventional technology]

As a method to prevent corrosion of connections in gas piping and water piping, the
Pipe joint covers such as those described in Publication No. 10319 have been used.

This conventional corrosion-proof joint cover is made up of a plurality of divided bodies made of plastic sheets as a base material, and each divided body has a recess on the inner surface that matches the shape of the pipe joint. The fittings are closely fitted into the corresponding parts of the tube, the mating parts are joined together, and the pipe fitting is attached to the pipe joint.

The joint cover described in the above publication has a watertight joint between the mating parts to obtain an anti-corrosion effect, but in order to further enhance the anti-corrosion effect, it is divided into parts as described in Japanese Utility Model Application No. 54-92430. An anticorrosive agent is applied to the entire inner surface of the body.

[Problem that the invention attempts to solve]

In this way, anti-corrosion joint covers are made up of multiple segments, and in conventional models, the mating parts of the segments are bonded together on-site, making it difficult to obtain sufficient bonding pressure and creating a watertight seal. There was a problem that the watertightness of the above-mentioned mating portion joint portion, which forms the zone, was not sufficient.

[Purpose of invention]

The present invention was devised to solve the above-mentioned problems, and an object of the present invention is to obtain a pipe joint cover that is superior in watertightness and has a higher anti-corrosion effect than conventional covers.

[Means to solve the problem]

In order to achieve the above object, the present invention has a recess that fits the shape of the pipe joint and an extension part that covers the pipe connected to the pipe joint, and a plurality of parts having a mating part on the periphery excluding the tip of the extension part. In the pipe joint cover consisting of divided bodies, the concave surface sides of the divided bodies to be joined to each other are covered with an anticorrosive agent layer, and a watertight material layer is formed on at least one surface of the mating portions of the divided bodies to be joined to each other. Further, one of the mating portions that are in contact with each other is provided with a protruding portion extending substantially parallel to the periphery thereof.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

1 and 2, 1 and 10 are divided bodies (halves) of the joint cover, and in FIG. It has extension parts 3, 3 externally attached to the pipes B, 3 connected to the joint A, and a mating part 4 for joining the two, respectively, is provided. The recess 2 is a central recess 2A that fits the main body of the pipe fitting A.
and enlarged recesses 2B that are formed on both sides of the central recess 2A and fit into the socket of the pipe joint A.

The main body of the divided bodies 1 and 10 is a plastic sheet 1
On the inner surface of the plastic sheet 1A of one divided body 1, an anticorrosion agent layer 1B of a predetermined thickness is formed on the concave portion 2 and the side surfaces of the concave portion 2 of the extension portion 3. A good material layer (watertight material layer) 1C is formed. The other divided body 1
On the inner surface of the plastic sheet 1A of No. 0, an anticorrosive layer 1B is formed on the side surfaces of the recessed portion 2 except for the mating portion 4. As shown in FIGS. 1 and 2, the mating portions 4 of the plastic sheets 1A of the two divided bodies 1 and 10 have holes 5 for connecting pins at corresponding locations, and the holes 5 are located in the recesses 2 and 1A. A plurality of them are formed at predetermined intervals so as to surround the extension part 3. Split body 1
The mating portion 4 of No. 0 is further formed with a protrusion 6 that bulges toward the inner surface thereof and extends inward from the hole 5 of the mating portion 4 in parallel to the inner peripheral edge.
Note that this protruding portion 6 is also formed continuously on the extension portion 3 of the divided body 10, and the protruding portion 6 is similarly formed on the extension portion 3 of the divided body 1. 7 is a connecting pin, and a hook portion 7b is formed at the tip of a pin leg extending from the head seat 7a.

As the plastic sheet 1A, a plastic sheet with excellent corrosion resistance, impact resistance, electrical insulation, abrasion resistance, etc. is preferable, and vinyl chloride resin,
A flexible foam such as a resin foam such as polyurethane or a rubber foam is used.

As the anticorrosive agent for the anticorrosive agent layer 1B, for example, an anticorrosive agent used in this field such as a butyl-based anticorrosive agent or a petrolatum-based anticorrosive agent is used.

The watertight material 1C is not particularly limited, but since the above-mentioned butyl-based anticorrosive agent and petrolatum-based anticorrosive agent have adhesiveness and good watertightness, they may be used as they are.

The joint cover of this embodiment has two divided bodies 1 and 10.
One of the divided bodies 1 is fitted and brought into close contact with one side of the pipe joint shown in FIG. Watertightly joined with corresponding holes 5,
A connecting pin 7 is inserted through the connector 5 to connect the connector 5 with pressure.

In this embodiment, the protruding portion 6 of the mating portion 4 is formed on the divided body 10 side, but it may be formed on the divided body 1 side.

Further, in this embodiment, the watertight material layer 1C is formed on the mating portion 4 of the divided body 1, but this watertight material layer 1C may be formed on at least one of the mating portions 4, 4 to be joined to each other. good.

Moreover, the divided bodies 1, 1 of the joint cover of the above embodiment
0 are separate bodies from each other, but the present invention can also be applied to a joint cover in which both divided bodies are integrally formed via a hinge portion.

[Effect]

In this embodiment, since the concave surfaces of the divided bodies to be joined to each other are covered with the anticorrosion agent layer, the anticorrosion agent layer closely adheres to the surface of the pipe joint part and exhibits an anticorrosion effect.

Furthermore, since a watertight material layer is formed on at least one surface of the mating portions of the divided bodies, the watertightness of the mating portions is excellent and the anticorrosion effect is further enhanced.

In addition, since one of the mating parts to be joined is formed with a protrusion extending approximately parallel to its periphery, the protrusion bites into the watertight material layer of the mating part of the other divided body, thereby creating a recess. Watertightness is ensured by forming a strip-shaped section with high bonding pressure so as to surround the extension section.

Furthermore, the protruding portion increases the strength of the mating portion against bending force.

[Effect of idea]

According to the present invention, the anticorrosive agent layer closely adheres to the surface of the pipe joint part to exhibit an anticorrosion effect, and the watertight material layer formed on the joint part provides excellent watertightness of the joint part. Furthermore, the protrusion formed on the mating part of one of the divided bodies bites into the anticorrosive layer of the mating part, and a high pressure weld line is formed to surround the concave part and extension part that fit the pipe joint part. Compared to conventional products, it is possible to improve watertightness and increase the anti-corrosion effect, and furthermore, the line of the protrusion increases the strength against bending force.
This has the advantage that the joint cover is more durable than pin joints.

[Brief explanation of the drawing]

FIG. 1 is a plan view of a divided body according to an embodiment of the present invention;
2 is a view taken in the direction of the - arrow in FIG.
The figure is a side view showing the pipe joint part to which the joint cover of the above embodiment is attached. DESCRIPTION OF SYMBOLS 1, 10... Divided body, 1A... Plastic sheet base material, 1B... Anticorrosion agent layer, 1C... Watertight material, 2... Recessed part, 3... Extension part, 4... Matching part,
5... Hole, 6... Projection, 7... Connecting pin.

Claims (1)

[Claims for Utility Model Registration] 1. A plurality of recesses that match the shape of a pipe joint and an extension part that covers the pipe connected to the pipe joint, and a mating part is provided on the periphery excluding the tip of the extension part. In a pipe joint cover made of divided bodies, the concave surfaces of the divided bodies to be joined to each other are covered with an anticorrosive layer, and a watertight material layer is formed on at least one surface of the mating parts of the divided bodies to be joined to each other, Further, the pipe joint cover is characterized in that one of the mating parts that come into contact with each other is formed with a protrusion extending substantially parallel to the periphery thereof. 2. The pipe joint cover according to claim 1 of the utility model registration claim, characterized in that holes for connecting pins are formed at a predetermined interval on the outside of the protrusions of the mating parts of the divided bodies that are joined to each other. .