Prefabricated heat preservation corrugated reinforced spiral steel pipe with self-anchoring connector

Abstract

The utility model belongs to the field of pipelines, and particularly relates to a heat distribution pipeline which comprises a hard polyurethane foam layer, a high-density polyethylene layer, an M16 retaining bolt, a bellmouth, a steel cylinder, a cement mortar layer, an insertion opening, a T-shaped rubber ring, a rectangular rubber ring and corrugations. By means of the design, the water supply pipeline is high in strength and impermeability, the overall durability of the pipeline is improved, and the material cost is saved, the outer heat preservation layer is formed by combining the hard polyurethane foam plastic layer and the high-density polyethylene layer and has the good heat preservation capacity, and the inner corrosion prevention layer adopts the centrifugally-coated cement mortar protection layer; and through the design of the bell and spigot and the design of the bolts, connection, installation and positioning can be rapidly achieved, construction is convenient, and the connecting structure is suitable for being installed underwater and under other special environment operation and is wider in application range.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of pipelines, in particular to a heat pipeline. BACKGROUND

[0002] Traditional spiral welded pipes and other water supply pipelines have problems such as large amount of steel, high construction cost, etc., and cannot meet the high requirements of modern industry on water supply pipelines. Therefore, it is of great practical significance to study a water supply pipeline with low steel consumption, improved overall durability of the pipeline, saved material cost and convenient installation under underwater and other special environments.

[0003] Therefore, there is an urgent need in the prior art to solve the above problems. CONTENT OF THE UTILITY MODEL

[0004] The technical problem to be solved by the utility model is to provide equipment and systems for the problems in the background art.

[0005] A self-anchored interface prefabricated thermal insulation corrugated reinforced spiral steel pipe, characterized in that it comprises a hard polyurethane foam layer, a high-density polyethylene layer, M16 stop bolts, a socket, a steel cylinder, a cement mortar layer, a spigot, a T-shaped rubber ring and a rectangular rubber ring.

[0006] The steel cylinder is respectively provided with a socket and a spigot at both ends by welding; the socket and the spigot are both cylindrical with edges.

[0007] The outer wall of the steel cylinder and the outer wall of the socket are provided with the hard polyurethane foam layer and the high-density polyethylene layer layer by layer from inside to outside, the inner wall of the steel cylinder is provided with the cement mortar layer, and the cement mortar layer is in contact with the edges of the socket and the spigot.

[0008] The socket is provided with a rectangular rubber ring matched with the spigot; the socket is provided with M16 stop bolts, the spigot is provided with mounting bolt holes, the M16 stop bolts and the mounting bolt holes are matched with each other; the spigot is provided with a T-shaped rubber ring matched with the socket.

[0009] The cross section of the socket and the spigot is L-shaped.

[0010] The high-density polyethylene layer and the hard polyurethane foam layer are provided with through holes in positions in communication with each other, and the positions of the through holes correspond to the mounting positions of the M16 stop bolts.

[0011] The outer wall of the steel cylinder is regularly provided with corrugations.

[0012] The number of the M16 stop bolts is four or more.

[0013] The corrugations are U-shaped corrugations or double U-shaped corrugations.

[0014] Through the design scheme, the water supply pipeline has high strength, high impermeability, improves the overall durability of the pipeline, saves material cost, the outer thermal insulation layer is combined with the hard polyurethane foam layer and the high-density polyethylene layer and has good thermal insulation capacity, the inner anticorrosion adopts the centrifugal coated cement mortar protective layer, the design of the socket and the design of the bolt can be quickly connected, installed and positioned, and construction is facilitated, the application is suitable for installation under underwater and other special environments, and the application range is wider. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a structural schematic view of the utility model.

[0016] Figure 2 It is an assembly schematic view of the utility model.

[0017] 1-hard polyurethane foam layer, 2-high-density polyethylene layer, 3-M16 stop bolt, 4-socket, 5-steel cylinder, 6-cement mortar layer, 7-spigot, 8-T-shaped rubber ring, 9-rectangular rubber ring, 10-corrugation. DETAILED DESCRIPTION

[0018] The application is further described in combination with the drawings:

[0019] A self-anchored joint prefabricated thermal insulation corrugated reinforced spiral steel pipe, characterized in that it comprises a hard polyurethane foam layer 1, a high-density polyethylene layer 2, an M16 stop bolt 3, a socket 4, a steel cylinder 5, a cement mortar layer 6, a spigot 7, a T-shaped rubber ring 8 and a rectangular rubber ring 9.

[0020] The steel cylinder 5 is respectively welded with the socket 4 and the spigot 7 at both ends; the socket 4 and the spigot 7 are both cylindrical with edges.

[0021] The outer wall of the steel cylinder 5 and the outer wall of the socket 4 are provided with the hard polyurethane foam layer 1 and the high-density polyethylene layer 2 layer by layer from inside to outside, the inner wall of the steel cylinder 5 is provided with the cement mortar layer 6, and the cement mortar layer 6 is in contact connection with the edges of the socket 4 and the spigot 7.

[0022] The socket 4 is provided with the rectangular rubber ring 9 matched with the spigot 7; the socket 4 is provided with the M16 stop bolt 3, the spigot 7 is provided with a mounting bolt hole, the M16 stop bolt 3 and the mounting bolt hole are matched with each other; the spigot 7 is provided with the T-shaped rubber ring 8 matched with the socket 4.

[0023] The cross section of the socket 4 and the spigot 7 is L-shaped.

[0024] The high-density polyethylene layer 2 and the hard polyurethane foam layer 1 are provided with through holes matched in up-down communication positions, and the positions of the through holes correspond to the mounting positions of the M16 stop bolt 3.

[0025] The outer wall of the steel cylinder 5 is regularly provided with corrugations 10.

[0026] The socket 7 is provided with mounting holes for cooperating with the M16 stop bolts 3.

[0027] The number of M16 stop bolts 3 is four or more.

[0028] The compressive strength of the cement mortar layer 6 is C50 or more;

[0029] The corrugations 10 are U-shaped corrugations or double U-shaped corrugations;

[0030] The high-density polyethylene layer 2 and the rigid polyurethane foam layer 1 are combined to form an external thermal insulation layer.

[0031] The high-density polyethylene layer 2 and the rigid polyurethane foam layer 1 are provided with through holes that are connected from top to bottom, and the positions of the through holes correspond to the mounting positions of the M16 stop bolts 3. When adjacent self-anchored interface prefabricated thermal insulation corrugated reinforced spiral steel pipes are connected, the M16 stop bolts 3 are operated by the operator through the through holes. The M16 stop bolts 3 are regularly arranged on the socket 4, which ensures that the socket 4 and the socket 7 can be conveniently and correspondingly mounted. The connected through holes are plugged after operation.

[0032] The external thermal insulation layer of the steel cylinder 5 is processed by the rigid polyurethane foam layer plastic layer 1 and the high-density polyethylene layer outer protective tube 2. The regularly arranged U-shaped corrugations or double U-shaped corrugations on the steel cylinder 5 can more effectively disperse and withstand internal and external pressure. At the same time, the corrugated structure increases the interfacial bonding area between the cement mortar layer 6 and the inner surface of the steel cylinder 5, and the overall strength is significantly improved.

[0033] The cross section of the socket 4 and the socket 7 is L-shaped, and the short side of the L-shaped cross section is the edge of the socket 4 and the socket 7 inside the steel cylinder 5. The cement mortar layer 6 is in contact and connected with the two edges;

[0034] When adjacent self-anchored interface prefabricated thermal insulation corrugated reinforced spiral steel pipes are installed, the M16 stop bolts 3 of the socket 4 cooperate with the mounting bolt holes of the socket 7. The T-shaped rubber ring 8 and the rectangular rubber ring 9 are used for sealing the connection between adjacent self-anchored interface prefabricated thermal insulation corrugated reinforced spiral steel pipes, forming double sealing.

[0035] When subjected to radial external force, the corrugated structure can significantly improve the radial buckling resistance of the steel cylinder 5, and the radial stability of the steel cylinder 5 is enhanced by more than 1 times. Therefore, under the same external load, the wall thickness of the steel cylinder 5 can be reduced. Under the same design strength, the amount of steel is reduced, thereby reducing the engineering cost and after-sales maintenance cost.

[0036] The outer anticorrosion adopts epoxy resin paint or two-oil-one-cloth epoxy coal pitch paint, etc.; the inner anticorrosion adopts the cement mortar layer 6 coated by centrifugation, and the cement raw material is selected to be high quality and strictly tested. The cement mortar layer 6 is ensured to be solid and compact, smooth, good in adhesion to carbon steel surface, not to fall off, not to scale, and uniform in thickness, so that every inch of the pipeline is protected in detail.

[0037] The socket structure of the present application adds the sealing mode of the combination of the T-shaped rubber ring 8 and the rectangular rubber ring 9, the socket is produced by moulding, the working pressure of the whole pipeline is greater than or equal to 1.6 MPa, and the test pressure is greater than or equal to 2.1 MPa. The socket has the self-positioning effect during installation, and the joint has good sealing performance.

[0038] The two sealing rubber rings, the T-shaped rubber ring 8 and the rectangular rubber ring 9, form two sealing lines. When one rubber ring is not tightly sealed, the other rubber ring can still play a sealing role, which can effectively prevent water leakage. At the same time, the first rubber ring can completely block various impurities in the water, so that the second rubber ring only needs to play a backup sealing role. Under complex working conditions such as pipeline pressure fluctuation and slight pipeline deformation, the double rubber rings can better adapt to and maintain the sealing performance, reduce the risk of leakage, and ensure the impermeability of the pipe.

[0039] The self-anchoring interface adopts the socket connection of the socket 4 and the spigot 7, is self-anchored, does not need to be welded during pipeline laying, and only needs to be blocked after installation 4-6 process holes, the process holes are through holes provided in the upper and lower high-density polyethylene layer 2 and the hard polyurethane foam layer 1, the construction is more convenient, and the installation efficiency is improved. The installation personnel only need to be simply trained to perform the installation work, and the application is suitable for long pipelines.

[0040] The detailed implementation of the present application is as follows:

[0041] The steel cylinder 5 is made; the steel cylinder 5 is subjected to welding seam inspection; the socket 4 and the spigot 7 are welded and installed; the cement mortar layer 6 is filled by centrifugation as an anticorrosion layer; the cement mortar layer 6 is subjected to curing; the hard polyurethane foam layer plastic layer 1 and the high-density polyethylene layer 2 are made as outer protective pipe layers.

Claims

1. A self-anchoring interface prefabricated thermal corrugated reinforced spiral steel pipe, characterized by, Include: Hard polyurethane foam layer (1), high-density polyethylene layer (2), M16 stop bolt (3), socket (4), steel cylinder (5), cement mortar layer (6), socket (7), T-shaped rubber ring (8) and rectangular rubber ring (9); The steel cylinder (5) is respectively welded with socket (4) and socket (7) at both ends; the socket (4) and socket (7) are both cylindrical with edge; The outer wall of the steel cylinder (5) and the outer wall of the socket (4) are provided with hard polyurethane foam layer (1) and high-density polyethylene layer (2) from outside layer by layer, the inner wall of the steel cylinder (5) is provided with cement mortar layer (6), and the cement mortar layer (6) is connected with the edge of the socket (4) and the socket (7); The socket (4) is provided with rectangular rubber ring (9) matched with socket (7); the socket (4) is provided with M16 stop bolt (3), the socket (7) is provided with mounting bolt hole, the M16 stop bolt (3) and the mounting bolt hole are matched with each other; the socket (7) is provided with T-shaped rubber ring (8) matched with socket (4).

2. The self-anchoring, pre-fabricated, insulated, corrugated reinforced, spiral steel pipe according to claim 1, characterized in that: The cross section of the socket (4) and the socket (7) is L-shaped.

3. The self-anchoring, pre-fabricated, insulated, corrugated reinforced, spiral steel pipe according to claim 1, characterized in that: The high-density polyethylene layer (2) and the hard polyurethane foam layer (1) are provided with through holes matched with up and down communication positions, and the positions of the through holes correspond to the installation positions of the M16 stop bolt (3).

4. The self-anchoring, pre-fabricated, insulated, corrugated reinforced, spiral steel pipe according to claim 1, characterized in that: The outer wall of the steel cylinder (5) is regularly provided with corrugation (10).

5. The self-anchoring, pre-fabricated, insulated, corrugated reinforced, spiral steel pipe according to claim 1, characterized in that: The number of M16 stop bolt (3) is more than four.

6. The self-anchoring, pre-fabricated, insulated, corrugated reinforced, spiral steel pipe according to claim 4, characterized in that: The corrugation (10) is U-shaped corrugation or double U-shaped corrugation.

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