JPS62500878A - Annular flat gasket for propulsion pipe - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] Annular flat gasket for propulsion vibrator The present invention relates to a cylindrical flat ring gasket made of an elastomer material and its , a spigot provided at the pipe end with a connecting sleeve surrounding the gasket. Relates to the use for sealing of propulsion type vibes.

So-called spigot end pipes, i.e. ends with an outside diameter smaller than the outside diameter of the pipe. During the laying of pipes with end sections, the vibrator is attached to connecting strips surrounding these spigots. Connected by leaves. As a rule, the so-called slip ring gasket , one row is Pipes and Pipes International a+% July/August 1983, pp. 7-13, by D. 5tein et al. At the end of the pipe or in the groove of the spigot, as described, placed between the sheave and the spigot. Vibrator subigoft if necessary Providing a groove for the slip ring gasket at the end weakens the pipe wall and this Under difficult propulsion conditions, damage to the pipe at the connection was repeatedly observed. This has caused unwanted leakage for a long time. If there is no groove, a single The sealing ability of the spring gasket is often insufficient.

According to DE-O31475807, pipe sleeves extending over service vibes Service vibe where two pipe ends are connected together tightly and under tension by Connecting and sealing members are known. This sealing member has its inner circumference and At each end of the outer circumference, the inner circumference and It has a thin plate that extrudes both the bulge and the outer circumferential surface, and is higher than the bulge. These thin plates are They engage the grooves on the circumference of the connecting sleeve, and when installed they are under pressure. under power. The bulge engages with a corresponding groove provided in the connecting sleeve and the pipe provides a secure fit of the sealing member on the outside of the

However, in propulsion technology, this type of gasket is Connecting sleeves are used with relatively small wall thicknesses, in which case the grooves are manufactured at high cost. Due to the necessary grooves in the connecting sleeve and pipe end, Not suitable for use with loose propulsion pipes.

The present invention can be easily installed on a pipe spigot and its sealing ability is The propulsion type spigot is better than that of the slip ring gasket. Provides a specific flat ring gasket for use in end pipes.

The disadvantage of the known gasket is that the spigot at the pipe end has an outer diameter smaller than the diameter of the pipe. Continuous flat ring gasket as a gasket for propulsion type pipes with Multiple intervals, with semicircular cross section, placed on the sketches and directed outwards a placed circumferential bulge with a flattened end towards the edge of the gasket an annular cylindrical flat shape of elastomeric material containing a lateral outer bulge This can be resolved by using a ring gasket. This gasket is a smooth spigot. placed on top and surrounded by a mating pipe sleeve under pressure.

Preferably, the main body of the cylindrical flat spring gasket has a spherical surface in cross section. It has a shape. In one embodiment, the cylindrical shape facing the pipe spigot Inside the body, better align the gasket under pressure against the outer pipe wall. Rack-shaped irregularities are formed in the circumferential direction to allow the

Preferably, the gasket is adhesively secured to the spigot of the propulsion pipe.

The connecting sleeve of the pipe is fixed to the spigot by applying glue or shrinking. If so, simply place the gasket on the spigot of the pipe that will be inserted into the connecting sleeve. It is only necessary to place the However, at both adjacent ends of the pipe It is also possible to provide each with one of the gaskets of this invention, and these pipes The pipe end is then connected by a connecting sleeve that runs the entire length of the pipe spigot. Surrounded together.

This connecting sleeve has an outer diameter that corresponds to the outer diameter of the propulsion pipe, and an inner diameter that corresponds to the outer diameter of the propulsion pipe. It's like there's pressure on the top.

Inside the pipe end of the other pipe with the connecting sleeve of the spigot with gasket Cross-section of the cylindrical body of the flat ring gasket to facilitate insertion into the has a slightly spherical shape. To improve the fit against the pipe wall, The gasket has a rack-like unevenness in the circumferential direction on the inside facing the pipe spigot. It is advantageous to do so. Such irregularities improve adhesion to the toe. such a person The fastening can be achieved by adhesives or fast-curing molding compounds. Especially strong glass fiber For propulsion pipes made of plastic materials, use adhesives such as epoxy resin adhesives. Preferably, a two-component adhesive is used.

The material used for the gasket is placed under pressure to achieve the required sealing effect. Synthetic elastomer flexible and durable enough to deform the connecting sleeve containing rubber, chloroprene rubber, other natural and synthetic rubbers, and fluoropolymers. nothing.

The flat ring gasket according to the particular invention has a diameter of 40 to 140 mm, preferably 6 It includes a cylindrical body having a width of 0-1101. provided on the outer surface, semicircular The thickness of the bulge portion having a shaped cross section is 2.5 to 20n+n+, and these bulges The depth of the groove between them is 1~b The inner diameter of the cylindrical body is determined by the outer diameter of the pipe spigot of the propulsion pipe. In the case of sewer pipes, it is 340 to 1730+nn depending on the nominal diameter of the pipe. Ga The distance between two bulges on the sket, that is, the groove width is the radius of the bulge + 31111 m. Equivalent to twice as much. The number of round irregularities or bulges on the cylindrical body is 5 to 12, preferably Preferably, the number is 6 to 8, and these round irregularities in the circumferential direction are arranged at the above-mentioned distance. ing. These rounded bumps or bulges located on the two lateral edges outwardly allow gas to It extends flat towards the edge of the ket.

Figure 1 shows the arrangement of gaskets on the spigot 2 of a pipe 3 with a spigot end. FIG. The end of one pipe with spigot 2 is connected to connecting pipe 5. It is inserted into the connecting sleeve 4. The connecting sleeve 4 is attached by adhesive or by shrinking. It is fixed to the spigot end of a pipe that has a spigot end, thereby Eliminating the need for a seal between the connecting sleeve and the outer wall of the pipe. gasket The gasket 1 is under pressure from the connecting sleeve 4, and the elasticity of the gasket material causes the upper flat surface to It gives the lateral spread of swelling and swelling. In one embodiment, the gasket 1 is fixed to the spigot 2 of the pipe with adhesive.

Figure 2 shows a semicircular cross section installed on a continuous cylindrical flat hanging gas raft. a gas having a plurality of spaced outwardly directed circumferential bulges 7; 1 is a cross-sectional view of one embodiment of the jacket 1. FIG. The outer lateral bulge should be directed towards the edge of the gasket. It used to be a flat ring gasket with a circumferential rack inside the flat ring gasket. The unevenness 6 will later be made to face a propulsion pipe-shaped spigot.

The above-mentioned particular flat ring gasket is particularly suitable for glass fiber reinforced plastic materials. Suitable for propulsion pipes consisting of However, essentially these gaskets can also be used in propulsion pipes made of other materials such as cement.

A particular advantage according to the invention is that these specially shaped flat ring gaskets is a spigot on the end of a pipe with a specific shape or a connection with a specific shape The reason is that there is no need for a sleeve. These are installed on the spigot of the pipe. It can be easily extruded and fixed with adhesive if necessary.

Procedural amendment January 30, 1986 Commissioner of the Patent Office Kuro 1) Akio 1.Display of the incident PCT/EP86/3.15 2. Name of the invention Annular flat gasket for propulsion vibrator 3. Person who makes corrections Relationship to the incident: Patent applicant Name: The Dow Chemical Company 4, Agent Address: Shizuko Toranomon Building, 8-10 Toranomon-chome, Minato-ku, Tokyo 105 Phone: 504 -07215, subject of correction , "Claims" column 6. Contents of amendment The scope of claims will be amended as shown in the attached sheet.

7. List of attached documents Scope of request for amendment 1 copy The scope of the claims 1. For propulsion pipes with a spigot having an outer diameter smaller than the pipe diameter. , is a ring-shaped flat gas cap made of elastomer material, and has multiple spacings. A continuous series of outwardly directed, circumferential, semicircular bulges with semicircular cross-section It is installed on a cylinder-like flat ring gasket, and these lateral outward expansions A gasket characterized in that the groove extends flatly toward the end of the gasket.

2. The cylindrical flat ring gasket is characterized by having a spherical cross section. A ring-shaped flat gasket according to claim 1.

3. On the inside where the flat ring gasket faces the spigot on the propulsion pipe. Claim 1 or 1, characterized in that it has rack-like irregularities in the circumferential direction. Ring-shaped flat gasket according to item 2.

international search report Al0JEX To tie INTERNATIONAI, 5EARCHRE PORT　0NUS-A-2615740Non.

Claims (5)

[Claims] 1. for propulsion pipes with a spigot having an outer diameter smaller than the pipe diameter , a ring-shaped flat gasket made of an elastomeric material, comprising a plurality of spaced apart gaskets. A continuous cylindrical bulge with a rounded, outwardly directed, semicircular cross-section It is provided on a flat ring gasket, and these lateral outer bulges A gasket characterized by a flat extension toward the end of the gasket. 2. characterized in that the cylindrical flat ring gasket has a spherical cross section, A ring-shaped flat gasket according to claim 1. 3. On the inside where the flat ring gasket faces the spigot on the propulsion pipe. Claim 1 or The ring-shaped flat gasket according to item 2. 4. A ring-shaped flat gasket according to claims 1 to 3 as a gasket for a propulsion pipe. The use of a gasket, in which the gasket is placed on the smooth spigot of the propulsion pipe. , characterized in that it is surrounded by a connecting sleeve of the mating pipe under pressure. use. 5. The gasket is fixed to the spigot of the propulsion pipe with adhesive. The use according to claim 4, wherein