Prefabricated foaming thermal insulation pipe

Abstract

The utility model discloses a prefabricated foaming heat preservation pipe which comprises a working steel pipe layer, a polyurethane heat preservation layer is fixedly installed on the outer side of the working steel pipe layer, a high-density polyethylene protection layer is fixedly installed on the outer side of the polyurethane heat preservation layer, and an outer sleeve cylinder is fixedly installed at the rear end of the working steel pipe layer. And an embedded splicing cylinder is fixedly mounted at the front end of the working steel pipe layer. According to the prefabricated foaming heat preservation pipe, the pasting circular rings and the alignment short strips are matched with the outer sleeve cylinder and the embedded splicing cylinder, so that the prefabricated foaming heat preservation pipe is more convenient to splice and firmer after being spliced, the sealing performance of the connecting position is better, the waterproof effect is better, the splicing mode is simpler, and the inside and the outside of the connecting position are smoother; wherein the outer sleeve cylinder and the embedded splicing cylinder are used for splicing, buckling and fixing, the pasting circular ring is used for pasting the polyurethane heat preservation layer and the high-density polyethylene protection layer, rainwater is prevented from directly leaking to the surface of the working steel pipe layer, and the alignment short strips are used for alignment during splicing.

Description

Technical Field

[0001] This utility model relates to the technical field of pre-foamed insulation pipe structure, and in particular to a pre-foamed insulation pipe. Background Technology

[0002] Precast foamed insulated pipes mainly consist of three parts: a working steel pipe layer, a polyurethane insulation layer, and a high-density polyethylene protective layer. The working steel pipe layer is selected according to design and user requirements; common materials include seamless steel pipes, spiral welded steel pipes, and straight seam welded pipes. The steel pipe surface may undergo shot blasting or anti-corrosion treatment. The polyurethane insulation layer is created by injecting rigid polyurethane foam composite material into the gap between the steel pipe and the outer protective layer using a low-pressure or high-pressure foaming machine. This process is completed through a chemical reaction, providing excellent waterproofing, insulation, and support for the weight of the heating network. The high-density polyethylene protective layer is a pre-fabricated plastic pipe with sufficient wall thickness, used to protect the inner polyurethane from mechanical damage, while also providing anti-corrosion and waterproofing.

[0003] Existing pre-insulated foam pipes have certain drawbacks in use. Traditional pre-insulated foam pipes are not strong enough after splicing, requiring manual application of glue for bonding. The splicing operation is cumbersome, the splicing method is not simple, and the sealing and waterproofing effects are poor. Utility Model Content

[0004] The main objective of this invention is to provide a pre-foamed insulation pipe that can effectively solve the problems in the background art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A prefabricated foamed insulation pipe includes a working steel pipe layer, a polyurethane insulation layer fixedly installed on the outer side of the working steel pipe layer, a high-density polyethylene protective layer fixedly installed on the outer side of the polyurethane insulation layer, an outer cylindrical sleeve fixedly installed at the rear end of the working steel pipe layer, and an embedded splicing cylinder fixedly installed at the front end of the working steel pipe layer. Adhesive rings are bonded and fixed to the front and rear surfaces of the polyurethane insulation layer and the high-density polyethylene protective layer. Alignment strips are fixedly installed on the outer side of the high-density polyethylene protective layer at the front and rear ends. Rectangular through holes are opened on the inner side of the outer cylindrical sleeve, and the number of rectangular through holes on the inner side of the outer cylindrical sleeve is six, which are evenly distributed.

[0007] Preferably, the embedded splicing cylinder includes an embedded outer cylinder, an elastic sheet block, a rubber sealing ring, an embedded inner cylinder, and a rubber sealing ring.

[0008] Preferably, the inner outer cylinder is fixedly installed at the front end of the working steel pipe layer, and the elastic plate block is fixedly installed in the through hole on the outer side of the inner outer cylinder. There are six through holes on the outer side of the inner outer cylinder, and the through holes on the outer side of the inner outer cylinder are evenly distributed.

[0009] Preferably, the rubber sealing ring is fixedly installed at the rear end of the inner outer cylinder, and an annular groove is provided on the outer side of the rubber sealing ring.

[0010] Preferably, the rear end of the embedded inner cylinder is fixedly connected to the rear end inside the embedded outer cylinder, the rubber sealing ring is fixedly installed on the front surface of the embedded inner cylinder, and a groove is provided on the outer side of the embedded inner cylinder corresponding to the position of the elastic plate block.

[0011] Preferably, the adhesive ring includes an adhesive gasket and a release paper ring.

[0012] Preferably, the adhesive gasket is fixedly installed on the front and rear surfaces of the polyurethane insulation layer and the high-density polyethylene protective layer, and the release paper ring is pasted on the surface of the adhesive gasket.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] In this utility model, the use of an outer cylindrical shell, an inner splicing cylinder, an adhesive ring, and an alignment strip, along with the outer cylindrical shell and the inner splicing cylinder, makes the splicing of prefabricated foamed insulation pipes more convenient, stronger, and more waterproof after splicing. The joints are also better sealed, waterproof, and the splicing method is simpler, resulting in smoother joints both inside and out. The outer cylindrical shell and the inner splicing cylinder are responsible for the splicing buckle fixation, the adhesive ring is responsible for attaching the polyurethane insulation layer and the high-density polyethylene protective layer to prevent rainwater from directly leaking onto the surface of the working steel pipe layer, and the alignment strip is responsible for alignment during splicing. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of a pre-foamed insulation pipe according to the present invention;

[0016] Figure 2 This is a partial exploded view of the working steel pipe layer and the adhesive ring of a prefabricated foamed insulation pipe according to this utility model;

[0017] Figure 3 This is an exploded view of the embedded splicing cylinder structure of a prefabricated foamed insulation pipe according to the present invention.

[0018] Figure 4 This utility model relates to a pre-fabricated foamed insulation pipe. Figure 1 Enlarged diagram of part A in the middle;

[0019] Figure 5 This utility model relates to a pre-fabricated foamed insulation pipe. Figure 1 Enlarged diagram of section B;

[0020] Figure 6 This utility model relates to a pre-fabricated foamed insulation pipe. Figure 2Enlarged diagram of section C.

[0021] In the diagram: 1. Working steel pipe layer; 2. Polyurethane insulation layer; 3. High-density polyethylene protective layer; 4. Outer cylinder; 5. Inner splicing cylinder; 501. Inner outer cylinder; 502. Elastic sheet block; 503. Rubber sealing ring; 504. Inner cylinder; 505. Rubber sealing ring; 6. Adhesive ring; 601. Adhesive gasket; 602. Release paper ring; 7. Alignment strip. Detailed Implementation

[0022] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0023] like Figure 1-6 As shown, a prefabricated foamed insulation pipe includes a working steel pipe layer 1, a polyurethane insulation layer 2 fixedly installed on the outer side of the working steel pipe layer 1, a high-density polyethylene protective layer 3 fixedly installed on the outer side of the polyurethane insulation layer 2, an outer cylindrical sleeve 4 fixedly installed at the rear end of the working steel pipe layer 1, and an embedded splicing sleeve 5 fixedly installed at the front end of the working steel pipe layer 1. Adhesive rings 6 are adhered and fixed to the front and rear surfaces of the polyurethane insulation layer 2 and the high-density polyethylene protective layer 3. Alignment strips 7 are fixedly installed on the outer side of the high-density polyethylene protective layer 3 at the front and rear ends. A rectangular through hole is opened on the inner side of the outer cylindrical sleeve 4. There are six rectangular through holes on the side. The rectangular through holes are evenly distributed on the inner side of the outer cylinder 4. The adhesive ring 6 and the alignment strip 7 work together with the outer cylinder 4 and the embedded splicing tube 5 to make the splicing of the pre-foamed insulation pipe more convenient, stronger after splicing, better sealing at the joint, better waterproof effect, simpler splicing method, and smoother inside and outside of the joint. The outer cylinder 4 and the embedded splicing tube 5 are responsible for splicing buckle fixation. The adhesive ring 6 is responsible for adhesiveting the polyurethane insulation layer 2 and the high-density polyethylene protective layer 3 to prevent rainwater from directly leaking onto the surface of the working steel pipe layer 1. The alignment strip 7 is responsible for alignment during splicing.

[0024] The embedded splicing cylinder 5 includes an embedded outer cylinder 501, an elastic plate retainer 502, a rubber sealing ring 503, an embedded inner cylinder 504, and a rubber sealing ring 505. The embedded outer cylinder 501 is fixedly installed at the front end of the working steel pipe layer 1. The elastic plate retainer 502 is fixedly installed in the through hole on the outside of the embedded outer cylinder 501. Six through holes are opened on the outside of the embedded outer cylinder 501, and the through holes are evenly distributed. The rubber sealing ring 503 is fixedly installed at the rear end of the embedded outer cylinder 501. An annular groove is provided on the side; the rear end of the inner cylinder 504 is fixedly connected to the rear end inside the outer cylinder 501; the rubber sealing ring 505 is fixedly installed on the front surface of the inner cylinder 504; a groove is provided on the outer side of the inner cylinder 504 corresponding to the position of the elastic sheet block 502; the adhesive ring 6 includes an adhesive gasket 601 and a release paper ring 602; the adhesive gasket 601 is fixedly installed on the front and rear surfaces of the polyurethane insulation layer 2 and the high-density polyethylene protective layer 3; and the release paper ring 602 is pasted on the surface of the adhesive gasket 601.

[0025] It should be noted that this utility model is a prefabricated foamed insulation pipe. In use, when splicing the prefabricated foamed insulation pipe among the outer cylinder 4, inner splicing cylinder 5, adhesive ring 6, and alignment strip 7, the release paper ring 602 on the surface of the adhesive gasket 601 is peeled off. Alignment is achieved through the alignment strip 7. The inner outer cylinder 501 and rubber sealing ring 503 are inserted into the interior of the outer cylinder 4. The elastic clip 502 is inserted into the rectangular through hole of the outer cylinder 4. During insertion, the elastic clip 502 is pressed into the outer groove of the inner cylinder 504. The rubber sealing ring 503 and rubber sealing ring 505 provide a sealing effect, ensuring continuity of the inner cylinder 504. The smooth inner wall of the joint, the polyurethane insulation layer 2 and the high-density polyethylene protective layer 3 are bonded together by adhesive gaskets 601, and the adhesive ring 6 and the alignment strip 7, together with the outer cylinder 4 and the inner splicing cylinder 5, make the splicing of the pre-foamed insulation pipe more convenient, stronger after splicing, better sealing at the joint, better waterproof effect, simpler splicing method, and smoother inside and outside of the joint. Among them, the outer cylinder 4 and the inner splicing cylinder 5 are responsible for splicing buckle fixation, the adhesive ring 6 is responsible for adhesiveting the polyurethane insulation layer 2 and the high-density polyethylene protective layer 3 to prevent rainwater from directly leaking onto the surface of the working steel pipe layer 1, and the alignment strip 7 is responsible for alignment during splicing.

[0026] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A preformed foamed insulating pipe characterised in that: The system includes a working steel pipe layer (1), a polyurethane insulation layer (2) fixedly installed on the outside of the working steel pipe layer (1), a high-density polyethylene protective layer (3) fixedly installed on the outside of the polyurethane insulation layer (2), an outer cylinder (4) fixedly installed at the rear end of the working steel pipe layer (1), an embedded splicing cylinder (5) fixedly installed at the front end of the working steel pipe layer (1), adhesive rings (6) are pasted and fixed on the front and rear surfaces of the polyurethane insulation layer (2) and the high-density polyethylene protective layer (3), alignment strips (7) are fixedly installed on the outside of the high-density polyethylene protective layer (3) at the front and rear ends, and rectangular through holes are opened on the inner side of the outer cylinder (4). There are six rectangular through holes opened on the inner side of the outer cylinder (4), and the rectangular through holes on the inner side of the outer cylinder (4) are evenly distributed. The embedded splicing tube (5) includes an embedded outer tube (501), an elastic sheet block (502), a rubber sealing ring (503), an embedded inner tube (504), and a rubber sealing ring (505). The inner outer cylinder (501) is fixedly installed at the front end of the working steel pipe layer (1), and the elastic plate block (502) is fixedly installed in the through hole on the outside of the inner outer cylinder (501). There are six through holes on the outside of the inner outer cylinder (501), and the through holes on the outside of the inner outer cylinder (501) are evenly distributed.

2. A preformed foam insulating tube according to claim 1, wherein: The rubber sealing ring (503) is fixedly installed at the rear end of the inner outer cylinder (501), and an annular groove is provided on the outer side of the rubber sealing ring (503).

3. The pre-insulated foamed pipe according to claim 2, characterized in that: The rear end of the inner cylinder (504) is fixedly connected to the rear end inside the outer cylinder (501), the rubber sealing ring (505) is fixedly installed on the front surface of the inner cylinder (504), and a groove is provided on the outer side of the inner cylinder (504) corresponding to the position of the elastic plate block (502).

4. A pre-insulated foamed pipe according to claim 3, characterized in that: The adhesive ring (6) includes an adhesive gasket (601) and a release paper ring (602).

5. A pre-insulated foamed pipe according to claim 4, characterized in that: The adhesive gasket (601) is fixedly installed on the front and rear surfaces of the polyurethane insulation layer (2) and the high-density polyethylene protective layer (3), and the release paper ring (602) is pasted on the surface of the adhesive gasket (601).

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