Gas protection sleeve

Abstract

The utility model relates to a fuel gas protective sleeve, which comprises an overhead fuel gas pipe and a PVC (polyvinyl chloride) pipe, the overhead fuel gas pipe is a built fuel gas pipeline, the distance between the overhead fuel gas pipe and other pipelines or equipment does not meet the standard requirement, a cold winding adhesive tape or beef tallow cloth is wound on the overhead fuel gas pipe, and the cold winding adhesive tape or the beef tallow cloth is tightly wound on the outer wall of the overhead fuel gas pipeline in a threaded manner. The cold winding adhesive tape or the beef tallow cloth is arranged in the PVC pipe, and polyurethane foam glue is filled between the cold winding adhesive tape or the beef tallow cloth and the PVC pipe. The device is wide in application range, convenient to construct, high in safety and reliability and convenient to maintain, disassemble and replace in the later period, and the problem that the safety distance between a gas pipeline and a cable, an air conditioner outdoor unit, a water heater smoke exhaust pipe and the like is insufficient at present can be effectively solved.

Description

Technical Field

[0001] The utility model relates to a gas protection sleeve, which is particularly applicable to an overhead gas pipeline for strengthening protection in occasions where the safety distance between an existing gas pipeline and a cable, an air conditioner outdoor unit, a water heater exhaust pipe, etc. is insufficient. Technical Background

[0002] As a clean energy, natural gas is widely used in residential life and enterprise production and can be transported to residential households or enterprise factory areas through pipelines. The natural gas pipelines were all constructed in accordance with relevant gas specifications in the early stage. However, during the later use process, with the illegal expansion of communities or enterprises and the construction of other infrastructure, the safety distance between the existing gas pipelines and other pipelines and equipment does not meet the specification requirements, resulting in potential safety hazards in the gas pipelines. Therefore, protection measures need to be taken for the gas pipeline sections with potential safety hazards. Since natural gas is a flammable and explosive gas, it is not convenient to carry out construction such as re-routing for the existing gas pipelines with potential safety hazards. A protection solution that can not only eliminate the potential safety hazards of gas pipelines but also facilitate construction and later maintenance is needed. Summary of the Invention

[0003] The problem to be solved by the utility model is to provide a gas protection sleeve, which has a wide application range, is convenient for construction, has strong safety and reliability, and can effectively solve the problem of insufficient distance between an existing gas pipeline and a cable, an air conditioner outdoor unit, a water heater exhaust pipe, etc.

[0004] The technical solution of the utility model is: a gas protection sleeve, including an overhead gas pipe and a PVC pipe. The overhead gas pipe is an existing gas pipeline whose distance from other pipelines or equipment does not meet the specification requirements. A cold-wrap tape or butyl cloth is wound around the overhead gas pipe, and the cold-wrap tape or butyl cloth is wound tightly around the outer wall of the overhead gas pipe in a spiral shape. The cold-wrap tape or butyl cloth is arranged inside the PVC pipe, and polyurethane foam glue is filled between the winding tape or butyl cloth and the PVC pipe.

[0005] The PVC pipe is formed by splicing two semi-circular arc segments. The two semi-circular arc segments cover the polyurethane foam glue and the seams of the two semi-circular arc segments are bonded by glass glue to form the PVC pipe. The seams of the two semi-circular arc segments are parallel to the axis of the overhead gas pipe; both ends of the PVC pipe are sealed with asphalt.

[0006] The outer wall of the PVC pipe is bundled with galvanized low-carbon steel wires, and the bundling distance of the galvanized low-carbon steel wires is 0.3 meters, and each winding is not less than 2 turns.

[0007] The low-carbon steel wire is No. 18 galvanized low-carbon steel wire (φ1.2), the PVC pipe is unplasticized polyvinyl chloride pipe (PVC-U pipe), the polyurethane foam adhesive is Class B1 non-combustible polyurethane foaming agent, the glass glue is silicone glue, the cold-wrap tape is polyethylene anti-corrosion tape, the tallow cloth is waterproof cloth made of tallow ester, and the asphalt is petroleum asphalt or coal tar pitch.

[0008] The beneficial effects of the present utility model are: wide application range, convenient construction, strong safety and reliability, capable of eliminating potential safety hazards of gas pipelines caused by insufficient safety distances between existing gas pipelines and cables, air conditioner outdoor units, water heater exhaust pipes, etc., and being convenient for later maintenance, disassembly and replacement. Description of the Drawings

[0009] Figure 1 is a schematic structural view of the present utility model.

[0010] Figure 2 is Figure 1 the B-B view of Detailed Description of the Invention

[0011] Referring to Figures 1-2 , the present utility model includes an overhead gas pipeline 1 and a PVC pipe 4. The overhead gas pipeline 1 is an existing gas pipeline with insufficient distance from other pipelines or equipment such as cables, air conditioner outdoor units, water heater exhaust pipes, etc. A cold-wrap tape or tallow cloth 2 is wound around the overhead gas pipeline 1. The cold-wrap tape or tallow cloth 2 is wound tightly around the outer wall of the overhead gas pipeline 1 in a spiral shape. The cold-wrap tape or tallow cloth 2 is arranged inside the PVC pipe 4, and a polyurethane foam adhesive 3 is filled between the cold-wrap tape or tallow cloth 2 and the PVC pipe 4.

[0012] The PVC pipe is composed of two semi-arc segments, an upper semi-arc 4.1 and a lower semi-arc 4.2. The two semi-arc segments are wrapped around the polyurethane foam adhesive 3 and the seams of the two semi-arc segments are bonded by glass glue 5 to form the PVC pipe 4. The seams of the two semi-arc segments are parallel to the axis 8 of the overhead gas pipeline; both ends of the PVC pipe 4 are sealed with asphalt 6.

[0013] In the present utility model, a cold-wrap tape or tallow cloth is wound around the overhead gas pipeline in the protected section. The cold-wrap tape or tallow cloth is wound tightly around the outer wall of the gas pipeline in a spiral shape. For vertical pipelines, it should be wound tightly from bottom to top, and for horizontal pipelines, it should be wound tightly from left to right, with an overlap of 40 mm front and back.

[0014] The PVC sleeve is cut into two semi-arcs, wrapped around the outer wall of the gas pipeline in the protected section, and the seams are bonded with glass glue. The seams of the PVC sleeve should be kept in the horizontal direction or parallel to the wall direction.

[0015] The outside of the PVC sleeve 4 is bundled with galvanized low-carbon steel wire 7. The bundling distance of the galvanized low-carbon steel wire 7 is 0.3 m, and each winding is not less than 2 turns.

[0016] Fill polyurethane foam glue between the PVC casing and the gas pipeline. After the polyurethane foam glue hardens, seal both ends of the PVC casing with asphalt.

[0017] The overhead gas pipeline is the existing overhead gas pipeline with insufficient spacing from cables, air conditioner outdoor units, water heater exhaust pipes, etc. The low-carbon steel wire is 18-gauge galvanized low-carbon steel wire (φ1.2). The PVC casing is a rigid polyvinyl chloride pipe (PVC-U pipe). The polyurethane foam glue is a B1 non-combustible polyurethane foaming agent. The glass glue is silicone glue. The cold-wrap tape is polyethylene anticorrosive tape. The butter cloth is a waterproof cloth made of butyric ester. The asphalt is petroleum asphalt or coal tar pitch.

Claims

1. A gas protection casing, characterized in that: It includes an overhead gas pipe and a PVC pipe. The overhead gas pipe is an existing gas pipeline whose spacing from pipelines or equipment does not meet the regulatory requirements. The overhead gas pipe is wrapped with cold-wrap tape or butter cloth. The cold-wrap tape or butter cloth is tightly wrapped around the outer wall of the overhead gas pipe in a threaded shape. The cold-wrap tape or butter cloth is arranged in the PVC pipe, and polyurethane foam glue is filled between the cold-wrap tape or butter cloth and the PVC pipe.

2. The gas protection sleeve according to claim 1, characterized in that: The PVC pipe is composed of two half-arc segments, which are covered with polyurethane foam glue and bonded by glass glue to form the PVC pipe. The joint of the two half-arc segments is parallel to the axis of the overhead gas pipe. Both ends of the PVC pipe are sealed with asphalt.

3. The gas protection sleeve according to claim 2, characterized in that: The glass glue is silicone glue, and the asphalt is petroleum asphalt or coal asphalt.

4. The gas protection sleeve according to claim 1, 2 or 3, characterized in that: The outer wall of the PVC pipe is bound with galvanized low-carbon steel wire. The spacing between the galvanized low-carbon steel wires is 0.3 meters, and each wrapping is no less than 2 turns.

5. The gas protection sleeve according to claim 4, characterized in that: The galvanized low-carbon steel wire is No. 18 galvanized low-carbon steel wire, the PVC pipe is a hard polyvinyl chloride pipe, the polyurethane foam adhesive is a B1 flame-retardant polyurethane foaming agent, the cold-wrap tape is a polyethylene anti-corrosion tape, and the tallow cloth is a waterproof cloth made of tallow ester.

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