PL64457Y1 - Thermoinsulated sewage pipe - Google Patents

Description

2 PL 64 457 Υ1

Pattern description

The subject of the utility model is a thermally insulated sewer pipe, protecting the sewage system against freezing.

Sewage pipes are known to be protected against freezing in the case of their foundation above the ground freezing point by using a suitably compacted thermal insulation material in the form of slag or expanded clay, or other lightweight insulating aggregate.

It is also known to protect sewage pipes with insulating covers made of materials with high thermal insulation, such as foamed polyurethane, foamed polyethylene, foamed synthetic rubber or polystyrene. However, it is then necessary to coat the outer casing layer with a polyethylene film or other waterproofing agent, for example paint. The outer layers and lagging can be easily damaged. The above-mentioned pipe protections do not meet the expectations in the case of the construction of a sewage system in waterlogged soil. From the Polish description of the utility model No. 61869 there is also known a pre-insulated pipe constituting a compact monolith, consisting of a service pipe with a fixed flange and a support flange and a casing pipe filled with thermal insulation, having a loosely rotating flange, while the service pipe is placed centrally inside the casing pipe. These pipes are used in mining to transport cooled air underground. Such pipes, although having favorable thermal and insulating protection, could not be used for sewage construction purposes due to the difficulties encountered in the flange-type connections.

The subject of the utility model is a sewage pipe constituting a composite structure composed of two centrally arranged pipes, in which the space between the pipes is filled with a heat-insulating layer. A pipe made in this way has an easy connection structure, tight and susceptible to possible bending of the pipe string.

The essence of the solution according to the utility model is that the heat-insulated sewer pipe is a composite structure, consisting of two centrally arranged pipes, in which the space between the pipes is filled with a heat-insulating layer, while the inner pipe is equipped with a connector socket on one side and a non-insulated section the pipe on the other side, and its thermal insulation layer on both side, external surfaces consists of polyurethane foam protected with a layer of mastic. The coupling socket outlet being a key connection is formed of an inner pipe and a heat-insulating shaped piece, the inner end of the pipe on the other side being longer than the outer pipe by a distance equal to or shorter than the depth of the socket. A pipe made in this way has a sealed structure and is susceptible to possible bends in the pipe string.

The object of the utility model is shown in the attached drawing, in which Fig. 1 shows an axonometric view of a heat-insulated sewer pipe, Fig. 2 shows a side section of a heat-insulated sewage pipe, and Fig. 3 shows an example of a connection of two thermally insulated sewer pipes.

According to the utility model, a heat-insulated sewage pipe consists of an outer casing pipe 1, an inner sewage pipe 2 and a heat-insulating layer 3. The inner sewage pipe 2 is equipped with a connector socket 4 on one side and an uninsulated section 5 on the other side. The heat-insulating layer 3 can in the central part consist of polystyrene, a mixture of polystyrene with polyurethane foam, or mineral wool. However, the heat-insulating layer 3 on both side, outer surfaces 6 consists of a polyurethane foam protected by a layer of mastic. The connector socket 4 is formed of an inner sewer pipe 2 and a heat insulating layer 3. On the other hand, the inner sewage pipe 2 is longer than the outer casing pipe 1 by a length 5 equal to or shorter than the depth of the connector socket 4.

Thermally insulated sewage pipes, preferably made of PVC, comprehensively solve problems with sewage freezing. They are used when it is necessary to thermally insulate the constructed external gravity sewage systems, in cases where it will be shallow, above the ground freezing limit or when there are soils that create difficulties in construction works, e.g. in mountainous and rocky areas.

The method of assembling thermally insulated sewage pipes consists in inserting a non-insulated section 5 of one pipe into the connector socket 4 of the other pipe. The construction of thermally insulated sewer pipes ensures butt contact of the outer edges of the casing pipes 1

Claims (2)

3 PL 64 457 Υ1 and the contact of the outer surfaces of the heat-insulating layers 3 when the non-insulated section 5 is fully inserted into the connector socket 4. Additionally, the recommended anti-moisture protection is to wrap the contact points of heat-insulated sewage pipes with self-adhesive tape. from two centrally arranged pipes, in which the space between the pipes is filled with a heat-insulating layer, characterized in that the internal sewage pipe / 2 / is equipped with a coupling socket / 4 / on one side and an uninsulated section / 5 / on the other side, and its heat-insulating layer / 3 / on both side, external surfaces / 6 / consists of polyurethane foam secured with a layer of mastic. 2. Thermally insulated sewer pipe according to claim 1, characterized in that the connector socket / 4 / is formed of an inner sewer pipe / 2 / and a heat-insulating layer / 3 /, the inner sewer pipe / 2 / on the other side being longer than the outer casing tube IV by a section / 5 / equal to or shorter than the depth of the connecting socket / 4 /.