Joint coating structure at joint of thermal insulation pipe

Abstract

The utility model relates to a joint coating structure of a heat preservation pipe joint, which belongs to the technical field of heat preservation pipe joint coating devices and comprises a plurality of sections of heat preservation pipes sleeved on the outer side of a working pipe and joint coating sleeves arranged on the outer sides of non-heat-preservation areas of the heat preservation pipes. Then a special pneumatic tool and a special code nail are used for fixing the heat preservation pipe and the joint coating sleeve, a welding wire is used for sealing a gap between the heat preservation pipe and the joint coating sleeve, then a heat shrinkage belt is used for bonding and sealing the position of a connecting gap between the joint coating sleeve and the heat preservation pipe, and the code nail is matched for fixing and an extrusion welding gun for sealing; and the multi-layer sealing effect after the two thermal insulation pipes are connected is ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of thermal insulation pipe patching devices, and in particular relates to a patching structure at a connection of a thermal insulation pipe. Background Art

[0002] The statements herein merely provide background art related to the present invention and do not necessarily constitute prior art.

[0003] Due to their excellent thermal insulation properties, insulated pipes are widely used in petroleum, chemical, and central heating projects. Conventional polyethylene (PE) insulated pipe patching typically uses an electrofusion kit. However, this patching method is not suitable for PVC insulated pipe patching. Conventional patching on PVC insulated pipes can result in poor sealing and structural instability. Utility Model Content

[0004] The purpose of the utility model is to provide a patching structure at the connection of an insulation pipe, which can at least solve one of the above technical problems.

[0005] To achieve the above-mentioned purpose, one or more embodiments of the present invention provide a patching structure at the connection of the insulation pipe, including multiple sections of insulation pipes sleeved on the outside of the working pipe and a patching sleeve arranged on the outside of the uninsulated area of ​​the insulation pipe, the uninsulated area being the gap left after the insulation pipes on the outside of the working pipe are connected, the insulation pipe includes an insulation layer and an outer protective layer, the insulation layer is sleeved on the working pipe, the outer protective layer is arranged on the outside of the insulation layer, the patching sleeve is sleeved on the outside of the outer protective layer, the inner diameter of the patching sleeve is equal to the outer diameter of the outer protective layer of the insulation pipe and is transitionally matched, and the length of the patching sleeve is greater than the length of the uninsulated area of ​​the insulation pipe.

[0006] Furthermore, the patching sleeve is arranged on the uninsulated area after the insulation pipes are connected, and the two ends of the patching sleeve are connected to the opposite end positions of the insulation pipes.

[0007] Furthermore, the patching sleeve and the insulation pipe are concentrically arranged.

[0008] Furthermore, the patching sleeve and the insulation pipe are fixed by pneumatic tools and special nails.

[0009] Furthermore, the code nails vertically penetrate the patching sleeve and the outer sheath material of the insulation pipe.

[0010] Furthermore, after the patching sleeve and the insulation pipe are fixed, the welding wire is heated by an extrusion tool to form a sealing strip at the contact surface and gap position of the patching sleeve and the insulation pipe to fill the gap.

[0011] Furthermore, a heat shrink tape is provided on the outer side of the connection between the patching sleeve and the insulation pipe to bond, fix and seal the joint position of the patching sleeve and the insulation pipe.

[0012] Furthermore, the heat shrink tape covers the area where the code pins are fixed and the welding wire is used for filling the seams.

[0013] Furthermore, the patching sleeve and the insulation pipe are both made of polyvinyl chloride.

[0014] Furthermore, the welding wire is polyvinyl chloride welding wire.

[0015] The beneficial effects of one or more of the above technical solutions are:

[0016] 1. The utility model makes transition matching of the outer diameter of the polyvinyl chloride patching sleeve and the insulation pipe equal, so that the patching sleeve can better fit the insulation pipe, quickly connect the two opposing insulation pipes, and then use polyvinyl chloride welding wire for sealing, thereby improving the air tightness between the insulation pipe and the patching sleeve, so that the connection between the two insulation pipes has higher pressure bearing strength and sealing performance. After installation, the interface of the two insulation pipes has a repeated overlap area, which can withstand a certain degree of thermal expansion and contraction due to temperature changes of the insulation pipe line.

[0017] 2. The utility model heats the pipeline and then fixes it with special pneumatic tools and special nails, so that the patching sleeve fits more closely with the insulated pipeline, avoiding the sleeve from shifting or falling out. With the fixation of special nails, the working pipe and the patching sleeve are rigidly connected into a whole, which fully improves the connection efficiency while ensuring the connection strength.

[0018] 3. The utility model seals the joint position of the patching sleeve and the insulation pipe by bonding with heat shrink tape, and uses a sealing strip formed by fixing with staples and extruding welding wire to ensure a multi-layer sealing effect of the connection between the two insulation pipes. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings in the specification, which constitute a part of this application, are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute a limitation on this application.

[0020] Figure 1 This is a schematic diagram of the connection between the patching structure and the insulation pipe in an embodiment of the present utility model;

[0021] Figure 2 This is a cross-sectional view of the connection between the patching structure and the insulation pipe in the embodiment of the utility model;

[0022] In the figure, 1. Insulation pipe; 2. Patching sleeve; 3. Staples; 4. Sealing strip; 5. Heat shrink tape; 6. Insulation layer; 7. Outer protective layer; 8. Working pipe. DETAILED DESCRIPTION

[0023] As described in the background, conventional PE insulated pipe patching typically uses an electric fusion kit. However, this patching method is not suitable for PVC insulated pipe patching. Conventional patching on PVC insulated pipes suffers from poor sealing and structural instability.

[0024] In order to solve the above technical problems, the utility model proposes a patching structure at the connection of the insulation pipe, which connects two opposite insulation pipes, and then uses special pneumatic tools and special code nails to fix the insulation pipe and the patching sleeve, and then uses welding wire to seal the gap between the insulation pipe and the patching sleeve, and then uses heat shrink tape to bond and seal the position of the connection seam between the patching sleeve and the insulation pipe, and cooperates with the code nail fixation and extrusion welding gun to seal, so as to ensure the multi-layer sealing effect after the two insulation pipes are connected.

[0025] See also Figure 1 and Figure 2 This embodiment provides a patching structure at the connection of the insulation pipe, including multiple sections of insulation pipes 1 sleeved on the outside of the working pipe 8 and a patching sleeve 2 arranged on the outside of the uninsulated area of ​​the insulation pipe 1. The uninsulated area is the gap left after the insulation pipes 1 on the outside of the working pipe 8 are connected.

[0026] The insulation pipe 1 includes an insulation layer 6 and an outer protective layer 7. The insulation layer 6 is sleeved on the working pipe 8. The outer protective layer 7 is arranged on the outside of the insulation layer 6. The patching sleeve 2 is sleeved on the outside of the outer protective layer 7. The patching sleeve 2 and the insulation pipe 1 are concentrically arranged and the inner diameter of the patching sleeve 2 is equal to the outer diameter of the outer protective layer 7 of the insulation pipe 1 and the transition is matched, so that the patching sleeve 2 and the insulation pipe 1 can fit better. The length of the patching sleeve 2 is greater than the length of the uninsulated area of ​​the insulation pipe 1. The patching sleeve 2 is arranged on the uninsulated area after the insulation pipe 1 is docked. The two ends of the patching sleeve 2 are connected to the opposite end positions of the insulation pipe 1, and the overlap length of the two ends is not less than 100 mm.

[0027] The patching sleeve 2 and the insulation pipe 1 are fixed by pneumatic tools and special code nails 3; the code nails 3 vertically penetrate the patching sleeve 2 and the outer protective layer 7 material of the insulation pipe 1; after the inner and outer layers of the structure are penetrated and fixed, the problem of pulling off during thermal expansion and contraction of the insulation pipe can be effectively solved.

[0028] After the patching sleeve 2 and the insulation pipe 1 are fixed, the welding wire is heated by an extrusion tool to form a sealing strip 4 at the contact surface and gap position of the patching sleeve 2 and the insulation pipe 1 to fill the gap, so as to achieve a sealing effect between the two structures.

[0029] Specifically, the patching sleeve 2, the insulation pipe 1 and the welding wire are all made of polyvinyl chloride.

[0030] A heat shrink tape 5 is provided on the outside of the connection between the patch sleeve 2 and the insulation pipe 1. The heat shrink tape 5 covers the area where the code nails 3 are fixed and the welding wire is used to fill the seam. After the patch sleeve 2 and the insulation pipe 1 are sealed, the joint position of the patch sleeve 2 and the insulation pipe 1 is bonded, fixed and sealed. The bonding overlap width of the heat shrink tape 5 is 100 mm larger than the overlap length of the two ends of the patch sleeve 2 and the opposite ends of the insulation pipe 1, and the overlap area on both sides is evenly distributed to meet the strength requirements, improve the reliability of the patch, and make the connection between the two insulation pipes 1 have higher pressure bearing strength and sealing performance.

[0031] Working principle:

[0032] First, connect the two opposing insulated pipes 1, heat the pipeline to make the insulated pipe 1 softer, and then use special pneumatic tools and special code nails 3 to fix it to prevent the patching sleeve 2 from displacement, and then use welding wire to seal and fill the gap between the insulated pipe 1 and the patching sleeve 2 to ensure that there will be no gap at the connection between the insulated pipe 1 and the patching sleeve 2; finally, use heat shrink tape 5 to bond and seal the connection seam between the patching sleeve 2 and the insulated pipe 1, and use the code nails 3 to fix and the extrusion welding gun to seal to ensure the multi-layer sealing effect after the two insulated pipes 1 are connected.

[0033] Although the above description of the specific implementation methods of the present invention is combined with the accompanying drawings, it does not limit the scope of protection of the present invention. Technical personnel in the relevant field should understand that on the basis of the technical solution of the present invention, various modifications or deformations that can be made by technical personnel in this field without creative work are still within the scope of protection of the present invention.

Claims

1. A patching structure for the joint of an insulation pipe, comprising multiple sections of insulation pipes sleeved on the outside of a working pipe and a patching sleeve arranged outside an uninsulated area of ​​the insulation pipe, wherein the uninsulated area is a gap left after the insulation pipes on the outside of the working pipe are connected, characterized in that: The insulation pipe includes an insulation layer and an outer protective layer. The insulation layer is sleeved on the working pipe, and the outer protective layer is arranged on the outside of the insulation layer. The patching sleeve is sleeved on the outside of the outer protective layer. The inner diameter of the patching sleeve is equal to the outer diameter of the outer protective layer of the insulation pipe and is transitionally matched. The length of the patching sleeve is greater than the length of the uninsulated area of ​​the insulation pipe.

2. The patching structure at the connection of the thermal insulation pipe according to claim 1, characterized in that: The patching sleeve is arranged on the uninsulated area after the insulation pipes are connected, and the two ends of the patching sleeve are connected to the opposite end positions of the insulation pipes.

3. The patching structure at the connection of the thermal insulation pipe according to claim 1, characterized in that: The patching sleeve and the insulation pipe are concentrically arranged.

4. The patching structure at the connection of the thermal insulation pipe according to claim 1, characterized in that: The patching sleeve and the insulation pipe are fixed by pneumatic tools and special nails.

5. The patching structure at the connection of the thermal insulation pipe according to claim 4, characterized in that: The code nails vertically penetrate the patching sleeve and the outer protective layer material of the thermal insulation pipe.

6. The patching structure at the connection of the thermal insulation pipe according to claim 1, characterized in that: After the patching sleeve and the insulation pipe are fixed, the welding wire is heated by an extrusion tool to form a sealing strip at the contact surface and gap position of the patching sleeve and the insulation pipe for filling the gap.

7. The patching structure at the connection of the thermal insulation pipe according to claim 1, characterized in that: A heat shrink tape is provided on the outside of the connection between the patching sleeve and the insulation pipe to bond, fix and seal the joint position of the patching sleeve and the insulation pipe.

8. The patching structure at the connection of the thermal insulation pipe according to claim 7, characterized in that: The heat shrink tape covers the areas where the staples are fixed and the wire is used for caulking.

9. The patching structure at the connection of the thermal insulation pipe according to claim 1, characterized in that: The patching sleeve and the insulation pipe are both made of polyvinyl chloride.

10. The patching structure at the connection of the thermal insulation pipe according to claim 6, characterized in that: The welding wire is a polyvinyl chloride welding wire.

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