Directly-buried polyurethane thermal insulation integrated pipe

Abstract

The utility model relates to the technical field of thermal insulation pipes, and discloses a directly-buried polyurethane thermal insulation integrated pipe. The directly-buried polyurethane heat preservation integrated pipe comprises a steel pipe, a polyurethane heat preservation layer is arranged on the outer side of the steel pipe, an outer sleeve is arranged on the outer side of the polyurethane heat preservation layer, and a positioning structure is arranged on the outer side of the outer sleeve. The fixing rings, the positioning inserts, the fixing inserts and the limiting sleeves are arranged, the fixing rings are fixed to the two ends of the outer sleeve of the heat preservation pipe through the bolts, when the heat preservation pipe is deeply buried, after the heat preservation pipe falls down, the two positioning inserts at the bottom ends of the fixing rings are inserted into soil under the gravity effect of the heat preservation pipe, and the heat preservation pipe is temporarily fixed; at the moment, the two fixing inserts penetrate through the supporting plate and the limiting sleeve and are inserted into the soil, the fixing inserts are beaten, the fixing inserts are vertically and stably inserted into the deep position of the soil under the supporting of the limiting sleeve, and therefore the heat preservation pipe and the soil pit are fixed through the fixing inserts.

Description

Technical Field

[0001] The utility model relates to the technical field of thermal insulation pipes, in particular to a directly buried polyurethane thermal insulation integrated pipe. Background Art

[0002] Polyurethane insulated pipe is made of high-functional polyether polyol combination materials and multiple methyl polyphenyl polyisocyanate as raw materials through chemical reaction foaming. Polyurethane insulated pipe is used for various indoor and outdoor pipelines, central heating pipelines, central air-conditioning pipelines, chemical, pharmaceutical and other industrial pipeline insulation and cold preservation projects. The main components of polyurethane insulated pipe are: protective shell: high-density polyethylene or fiberglass; insulation layer: rigid polyurethane foam plastic; working steel pipe: according to the technical requirements of the conveying medium, seam steel pipe, seamless steel pipe, double-sided submerged arc spiral welded steel pipe are used respectively. Most polyurethane insulated pipes are composed of a steel pipe for conveying the medium, a high-density polyethylene outer sleeve, and a rigid polyurethane foam insulation layer between the steel pipe and the outer sleeve.

[0003] When the existing polyurethane thermal insulation pipe is deeply buried, it is easy to roll due to the tubular structure of the thermal insulation pipe, making it difficult to position and fix the thermal insulation pipe in the deep pit. Therefore, a direct-buried polyurethane thermal insulation integrated pipe is urgently needed. Utility Model Content

[0004] The purpose of the utility model is to provide a direct-buried polyurethane thermal insulation integrated pipe to solve the problem proposed in the above background technology that the existing polyurethane thermal insulation pipe is difficult to position and fix in a deep pit due to its tubular structure, and the thermal insulation pipe is easily damaged by being squeezed by stones and soil after being deeply buried.

[0005] In order to solve the above technical problems, the utility model provides the following technical solutions: a direct-buried polyurethane thermal insulation integrated pipe, comprising a steel pipe, a polyurethane thermal insulation layer is arranged on the outside of the steel pipe, an outer sleeve is arranged on the outside of the polyurethane thermal insulation layer, a positioning structure is arranged on the outside of the outer sleeve, and a shock-absorbing structure is arranged on the rear end of the positioning structure.

[0006] The positioning structure includes a fixing ring, a positioning plug is fixed at the bottom end of the fixing ring, a bolt is arranged at the top end of the fixing ring, support plates are arranged on both sides of the fixing ring, a limiting sleeve is connected to the bottom end of the support plate, and a fixing plug is engaged with the inner side of the support plate.

[0007] The shock absorbing structure comprises a connecting sleeve, a shock absorbing air cushion is fixed to the outer wall of the connecting sleeve, an arc plate is arranged on the outer wall of the shock absorbing air cushion, and springs are arranged on both sides of the shock absorbing air cushion.

[0008] Preferably, the fixing ring is fixedly connected to the outer sleeve by bolts, and the positioning plug is welded to the bottom end of the fixing ring.

[0009] Preferably, the fixing plug is snap-connected with the support plate and the limiting sleeve, and the number of the fixing rings is two.

[0010] Preferably, the connecting sleeve is fixedly connected to the outer sleeve by glue, and the shock-absorbing air cushion is fixedly connected to the connecting sleeve by glue.

[0011] Preferably, the arc-shaped plate is fixedly connected to the shock-absorbing air cushion, and the number of the arc-shaped plates is eight.

[0012] Preferably, two ends of the spring are fixedly connected to the connecting sleeve and the arc-shaped plate respectively.

[0013] Compared with the prior art, the beneficial effects achieved by the utility model are:

[0014] First, the utility model provides a fixing ring, a positioning plug, a fixing plug and a limiting sleeve, and fixes the fixing ring to the two ends of the outer sleeve of the insulation pipe by bolts. Then, when the insulation pipe is deeply buried, after the insulation pipe falls, the two positioning plugs at the bottom of the fixing ring are inserted into the soil under the action of the gravity of the insulation pipe, so that the insulation pipe is temporarily fixed. At this time, the two fixing plugs are passed through the support plate and the limiting sleeve and inserted into the soil. The fixing plugs are hammered so that the fixing plugs are supported by the limiting sleeve and are vertically and firmly inserted into the deep soil, thereby fixing the insulation pipe and the pit through the fixing plugs.

[0015] Second, the utility model arranges a connecting sleeve, a shock-absorbing air cushion, an arc plate and a spring, and fixes the connecting sleeve to the outer wall of the outer sleeve by glue in advance. The eight shock-absorbing air cushions and eight groups of springs on the outside of the connecting sleeve buffer the vibration force and the extrusion force on the arc plate, reduce the damage of the vibration force and the extrusion force to the outer sleeve, and achieve the protective function of protection and shock absorption. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the structure of the fixing ring of the utility model;

[0018] Figure 3 This is a schematic diagram of the positioning structure of the utility model;

[0019] Figure 4 This is a schematic diagram of the shock absorbing structure of the utility model;

[0020] Figure 5 It is a schematic diagram of the shock-absorbing air cushion of the utility model.

[0021] Among them: 1. Steel pipe; 2. Polyurethane insulation layer; 3. Outer sleeve; 4. Positioning structure; 401. Fixing ring; 402. Bolt; 403. Positioning plug; 404. Support plate; 405. Limiting sleeve; 406. Fixing plug; 5. Shock-absorbing structure; 501. Connecting sleeve; 502. Shock-absorbing air cushion; 503. Arc plate; 504. Spring. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figure 1-3 A direct-buried polyurethane thermal insulation integrated pipe comprises a steel pipe 1, a polyurethane thermal insulation layer 2 is arranged on the outside of the steel pipe 1, an outer sleeve 3 is arranged on the outside of the polyurethane thermal insulation layer 2, a positioning structure 4 is arranged on the outside of the outer sleeve 3, a shock absorbing structure 5 is arranged at the rear end of the positioning structure 4, the positioning structure 4 comprises a fixing ring 401, a positioning plug 403 is fixed to the bottom end of the fixing ring 401, and a bolt 402 is arranged on the top of the fixing ring 401, support plates 404 are arranged on both sides of the fixing ring 401, a limiting sleeve 405 is connected to the bottom end of the support plate 404, and a fixing plug 406 is engaged with the inner side of the support plate 404, the fixing ring 401 is fixedly connected to the outer sleeve 3 by bolts 402, and the positioning plug 403 is welded to the fixing ring At the bottom of 401, the fixed plug 406 is engaged with the support plate 404 and the limiting sleeve 405. There are two fixing rings 401. The fixing ring 401 is fixed to the two ends of the outer sleeve 3 of the insulation pipe by bolts 402. Then, when the insulation pipe is deeply buried, after the insulation pipe falls, the two positioning plugs 403 at the bottom of the fixing ring 401 are inserted into the soil under the action of the gravity of the insulation pipe, so that the insulation pipe is temporarily fixed. At this time, the two fixing plugs 406 are passed through the support plate 404 and the limiting sleeve 405, and inserted into the soil. The fixed plug 406 is hammered so that the fixed plug 406 is vertically and firmly inserted into the deep soil under the support of the limiting sleeve 405, thereby fixing the insulation pipe and the pit through the fixed plug 406.

[0024] See also Figure 4-5A direct-buried polyurethane thermal insulation integrated pipe, the shock-absorbing structure 5 includes a connecting sleeve 501, a shock-absorbing air cushion 502 is fixed to the outer wall of the connecting sleeve 501, an arc plate 503 is arranged on the outer wall of the shock-absorbing air cushion 502, and springs 504 are arranged on both sides of the shock-absorbing air cushion 502, the connecting sleeve 501 is fixedly connected to the outer sleeve 3 by glue, and the shock-absorbing air cushion 502 is fixedly connected to the connecting sleeve 501 by glue, and the arc plate 503 is fixed to the shock-absorbing air cushion 502 The arc plates 503 are connected in number, and the two ends of the spring 504 are fixedly connected to the connecting sleeve 501 and the arc plate 503 respectively. The connecting sleeve 501 is fixed to the outer wall of the outer sleeve 3 by glue in advance. The eight shock-absorbing air cushions 502 and eight groups of springs 504 on the outside of the connecting sleeve 501 buffer the vibration force and the extrusion force on the arc plate 503, reduce the damage of the vibration force and the extrusion force to the outer sleeve 3, and achieve the protection function of protection and shock absorption.

[0025] When in use, the fixing ring 401 is fixed to the two ends of the outer sleeve 3 of the insulation pipe by bolts 402. Then, when the insulation pipe is deeply buried, after the insulation pipe falls, the two positioning plugs 403 at the bottom of the fixing ring 401 are inserted into the soil under the action of the gravity of the insulation pipe, so that the insulation pipe is temporarily fixed. At this time, the two fixing plugs 406 are passed through the support plate 404 and the limiting sleeve 405 and inserted into the soil. The fixing plugs 406 are hammered so that the fixing plugs 406 are vertically and firmly inserted into the deep soil under the support of the limiting sleeve 405, so that the insulation pipe and the pit are fixed by the fixing plugs 406. The connecting sleeve 501 is fixed to the outer wall of the outer sleeve 3 by glue in advance. The eight shock-absorbing air cushions 502 and eight groups of springs 504 on the outside of the connecting sleeve 501 buffer the vibration force and extrusion force exerted on the arc plate 503, reduce the damage of the vibration force and extrusion force to the outer sleeve 3, achieve the protection function of protection and shock absorption, and reduce the damage of stones and soil.

[0026] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit thereof, and the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A directly buried polyurethane thermal insulation integrated pipe, comprising a steel pipe (1), characterized in that: A polyurethane insulation layer (2) is arranged on the outside of the steel pipe (1), an outer sleeve (3) is arranged on the outside of the polyurethane insulation layer (2), a positioning structure (4) is arranged on the outside of the outer sleeve (3), and a shock absorbing structure (5) is arranged at the rear end of the positioning structure (4); The positioning structure (4) comprises a fixing ring (401), a positioning plug (403) is fixed at the bottom end of the fixing ring (401), a bolt (402) is arranged at the top end of the fixing ring (401), support plates (404) are arranged on both sides of the fixing ring (401), a limiting sleeve (405) is connected to the bottom end of the support plate (404), and a fixing plug (406) is engaged on the inner side of the support plate (404); The shock absorbing structure (5) comprises a connecting sleeve (501), a shock absorbing air cushion (502) being fixed to the outer wall of the connecting sleeve (501), an arc-shaped plate (503) being arranged on the outer wall of the shock absorbing air cushion (502), and springs (504) being arranged on both sides of the shock absorbing air cushion (502).

2. The direct-buried polyurethane thermal insulation integrated pipe according to claim 1, characterized in that: The fixing ring (401) is fixedly connected to the outer sleeve (3) via bolts (402), and a positioning plug (403) is welded to the bottom end of the fixing ring (401).

3. The direct-buried polyurethane thermal insulation integrated pipe according to claim 1, characterized in that: The fixing plug (406) is snap-connected with the support plate (404) and the limiting sleeve (405), and the number of the fixing rings (401) is two.

4. The direct-buried polyurethane thermal insulation integrated pipe according to claim 1, characterized in that: The connecting sleeve (501) is fixedly connected to the outer sleeve (3) by glue, and the shock-absorbing air cushion (502) is fixedly connected to the connecting sleeve (501) by glue.

5. The direct-buried polyurethane thermal insulation integrated pipe according to claim 1, characterized in that: The arc-shaped plates (503) are fixedly connected to the shock-absorbing air cushion (502), and the number of the arc-shaped plates (503) is eight.

6. The direct-buried polyurethane thermal insulation integrated pipe according to claim 1, characterized in that: The two ends of the spring (504) are fixedly connected to the connecting sleeve (501) and the arc-shaped plate (503) respectively.

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