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CN-121977135-A - Insulation pipe joint protection insulation structure and construction method thereof

CN121977135ACN 121977135 ACN121977135 ACN 121977135ACN-121977135-A

Abstract

The invention belongs to the field of heat preservation pipes, and in particular relates to a heat preservation pipe joint protection heat preservation structure and a construction method thereof, the heat preservation structure comprises a hot melting sleeve and a foaming heat preservation layer, the left end and the right end of the hot melting sleeve are respectively overlapped with protection pipes at the two sides of the joint, the foaming heat preservation layer is arranged between the hot melting sleeve and a working pipe at the joint, an anti-corrosion layer is also arranged between the working pipe and the foaming heat preservation layer, the protection heat preservation structure further comprises an inner support plate, the inner support plate is supported on the inner side of the stubble structure of the hot melting sleeve, two ends of the inner support plate are respectively fixedly overlapped with the protective pipes on two sides of the hot melting sleeve, the bottom surface of the inner support plate is flush with the outer wall of the protective pipes, when the protective heat-insulating structure is constructed, the inner support plate and the outer support plate clamp the stubble structure, the stubble structure is guaranteed to be tightly attached, gaps exist after the hot melting sleeve is prevented from being melted, the tightness of the protective heat-insulating structure at the joint is guaranteed, reworking operation is reduced, and construction efficiency is improved.

Inventors

  • WU YUEXING
  • LI FUSHENG
  • WU XIAOYANG
  • XU LONGJIAN
  • HE KANG

Assignees

  • 河北汇东管道股份有限公司

Dates

Publication Date
20260505
Application Date
20260408

Claims (8)

  1. 1. The utility model provides a thermal insulation pipe joint protection insulation structure, includes hot melt cover (1) and foaming heat preservation (2), the left and right sides of hot melt cover (1) respectively with protective tube (3) overlap joint setting in the interface both sides, foaming heat preservation (2) set up between hot melt cover (1) and work pipe (4) of interface department, work pipe (4) and foaming heat preservation (2) between still be provided with anticorrosive coating (5), characterized by, protection insulation structure still include interior backup pad (9), interior backup pad (9) support in the stubble structure (101) inboard of hot melt cover (1), the both ends of interior backup pad (9) are fixed with protective tube (3) overlap joint in hot melt cover (1) both sides respectively, the bottom surface of interior backup pad (9) is parallel and level with the outer wall of protective tube (3).
  2. 2. A construction method of a thermal insulation pipe joint protection thermal insulation structure for constructing the thermal insulation pipe joint protection thermal insulation structure as set forth in claim 1, comprising the steps of: s1, interface pretreatment, namely cleaning a working tube (4) at the interface and protection tubes (3) at two sides, polishing the protection tubes (3), and coating an anti-corrosion layer (5) on the working tube (4); S2, installing a hot melting destroying device (6), wherein the installing end of the hot melting destroying device (6) is fixedly adhered to the working pipe (4) at the joint, and the inner supporting plate (9) is fixedly connected with the overhanging end of the hot melting destroying device (6); S3, installing a hot melting sleeve (1), namely sleeving the hot melting sleeve (1) at an interface, respectively overlapping the left end and the right end of the hot melting sleeve (1) with the protection pipes (3) at the two sides of the interface, abutting the inner side of a stubble structure (101) of the hot melting sleeve (1) with an inner support plate (9), placing an outer support plate (7) at the outer side of the stubble structure (101), bundling and fixing the outer support plate (7) and the hot melting sleeve (1) on the protection pipes (3) at the two sides by virtue of a binding belt (8), forming a clamping structure of the stubble structure (101) by virtue of the inner support plate (9) and a hot melting destroying device (6), and temporarily supporting and connecting the working pipe (4) and the hot melting sleeve (1) by virtue of the inner support plate (9); s4, hot melt welding, namely heating the hot melt sleeve (1), heating up and melting the hot melt sleeve (1), bonding the hot melt sleeve and the protective tube (3) into a whole, and removing the binding band (8) and the outer support plate (7); S5, perforating, namely arranging a material injection hole (102) on the hot melting sleeve (1); S6, dismantling the hot melting destroying device (6), namely heating the hot melting destroying device (6) to disconnect the temporary support connection of the working pipe (4) and the hot melting sleeve (1); s7, pouring foaming materials, namely pouring the foaming materials into the hot melting sleeve (1) through the material pouring holes (102); S8, plugging the orifice, namely cleaning the flash at the injection hole (102), and plugging the injection hole (102) by using a plugging cover.
  3. 3. The construction method of the thermal insulation pipe joint protection thermal insulation structure according to claim 2, wherein the thermal melting destroying device (6) comprises an air bag (601) and a pair of thermal melting wires (603), the installation end of the air bag (601) is fixedly connected with the working pipe (4) in an adhering mode, the inner supporting plate (9) is connected with the overhanging end of the air bag (601), heating sections of the thermal melting wires (603) are respectively wrapped at the upper end and the lower end of the air bag (601), the thermal melting wires (603) at the lower end of the air bag (601) are downwards bent to bypass the inner supporting plate (9), avoidance grooves through which the thermal melting wires (603) penetrate are formed in the inner supporting plate (9), and the connection ends of the two thermal melting wires (603) are respectively overhanging from two sides of the working pipe (4) and point to the punching positions of the material injecting holes (102) at the top of the thermal melting sleeve (1).
  4. 4. The construction method of the thermal insulation pipe joint protection thermal insulation structure according to claim 2, wherein the thermal melting destroying device (6) comprises an upper thermal melting section (604), a lower thermal melting section (605) and an intermediate support section (606), the inner support plate (9) is connected with the lower thermal melting section (605), a thermal melting wire (603) is fixedly arranged on the intermediate support section (606), the thermal melting wire (603) is electrically connected with a sheet heating section (602), the sheet heating section (602) is respectively in thermal melting connection with the upper thermal melting section (604) and the lower thermal melting section (605), and the connecting end of the thermal melting wire (603) extends upwards in a suspending mode and points to the opening position of a material injection hole (102) at the top of the thermal melting sleeve (1).
  5. 5. The method for constructing a protective and insulating structure for an insulating pipe joint according to claim 3 or 4, wherein in the step S6, the connecting end of the hot melt wire (603) is taken out through the material injection hole (102), the connecting end of the hot melt wire (603) is connected with the hot melt machine, and the hot melt wire (603) is heated and simultaneously the hot melt wire (603) is extracted outwards until the hot melt wire (603) is completely extracted from a cavity surrounded by the hot melt sleeve (1).
  6. 6. The method for constructing a protective heat-insulating structure for a heat-insulating pipe joint according to claim 4, wherein the middle supporting section (606) is of a ladder-shaped structure, the sheet-shaped heating sections (602) are respectively arranged on two side surfaces of the ladder-shaped structure, the upper hot melting section (604) and the lower hot melting section (605) are respectively connected with the side surfaces of the middle supporting section (606) by virtue of the sheet-shaped heating sections (602), and the middle supporting section (606) and the hot melting wire (603) are arranged in an insulating manner.
  7. 7. The construction method of the thermal insulation pipe joint protection thermal insulation structure according to claim 6, wherein the ladder-shaped structure is arranged in parallel with the axis of the working pipe (4), and the connecting end of the hot melt wire (603) is led out from the bottom surface of the ladder-shaped structure and extends upwards in a suspending mode.
  8. 8. The construction method of the thermal insulation pipe joint protection thermal insulation structure according to claim 2, wherein the hot melting sleeve (1) is an electric melting sleeve, and in the step S4, a hot melting welder is connected with the electric melting sleeve and the electric melting sleeve is heated.

Description

Insulation pipe joint protection insulation structure and construction method thereof Technical Field The invention belongs to the field of heat preservation pipes, and particularly relates to a heat preservation pipe joint protection heat preservation structure and a construction method thereof. Background The heat preservation pipe includes work pipe, protection pipe and heat preservation between the two pipes, and the work pipe penetrates in the protection pipe, and the tip of work pipe is hung outside the tip of protection pipe generally, is convenient for lay the in-process and welds the work pipe of two sections heat preservation pipes to form continuous pipe network. After welding, the interface between adjacent heat preservation pipes needs to be protected and insulated. At present, the protection and heat preservation of the heat preservation pipe joint in industry generally adopt the lap joint of the strip-shaped hot melting sleeve on the protection pipes of two heat preservation pipes, the lap joint of the head end and the tail end of the hot melting sleeve forms a lap joint structure, then the hot melting sleeve is tied and fixed on the protection pipes of the heat preservation pipes by using a binding belt, and foaming materials are poured into the hot melting sleeve after hot melting, so that the protection and heat preservation operation of the heat preservation pipe joint is completed. However, in actual work, the hot-melt sleeve is only supported by the left end and the right end in a lap joint manner with the protective pipe when being bundled, the middle part of the lap joint structure of the hot-melt sleeve is suspended and is not effectively supported, the lap joint structure is very easy to overlap and not fit and misplace and even warp due to the fact that the materials are completely attached by tension, gaps exist between the lap joint structures, the air tightness of the joint of the heat-insulating pipe is not up to standard, reworking treatment is finally performed, the construction cost is increased, the construction period is delayed, and the high-quality and high-efficiency construction requirements of the current pipe network engineering are difficult to meet. Disclosure of Invention In order to solve the problems in the prior art, the invention provides the protective heat-insulating structure for the heat-insulating pipe joint and the construction method thereof, which can ensure the tightness of the protective heat-insulating structure at the joint, reduce reworking operation and improve construction efficiency. The invention adopts the specific technical scheme that: The utility model provides a thermal insulation pipe joint protection insulation construction, includes hot melt cover and foaming heat preservation, the both ends set up with the protective tube overlap joint of interface both sides respectively about the hot melt cover, the foaming heat preservation set up between the work pipe of hot melt cover and interface department, work pipe and foaming heat preservation between still be provided with the anticorrosive coating, the key lies in, protection insulation construction still include interior backup pad, interior backup pad support in the stubble structure inboard of hot melt cover, the both ends of interior backup pad are fixed with the protective tube overlap joint of hot melt cover both sides respectively, the bottom surface of interior backup pad is parallel and level mutually with the outer wall of protective tube. A construction method of a protective heat-insulating structure of a heat-insulating pipe joint comprises the following steps: S1, interface pretreatment, namely cleaning a working tube at the interface and protective tubes at two sides, polishing the protective tubes, and coating the working tube with an anti-corrosion layer; S2, installing a hot melting destroying device, namely adhering and fixing the installation end of the hot melting destroying device on the working pipe at the joint, wherein the inner supporting plate is fixedly connected with the overhanging end of the hot melting destroying device; s3, installing a hot melting sleeve, namely sleeving the hot melting sleeve at the joint, respectively overlapping the left end and the right end of the hot melting sleeve with protective pipes at two sides of the joint, abutting the inner side of a stubble structure of the hot melting sleeve with an inner support plate, placing an outer support plate at the outer side of the stubble structure, bundling and fixing the outer support plate and the hot melting sleeve on the protective pipes at two sides by virtue of a binding belt, forming a clamping structure of the stubble structure by virtue of the inner support plate and the outer support plate, and realizing temporary support connection between the working pipe and the hot melting sleeve by virtue of the inner support plate and a hot melting destroying device; S4, hot melt welding, namely