CN207406934U - A kind of prefabricated direct-buried thermal insulation pipe - Google Patents

Abstract

The utility model relates to a prefabricated direct-buried heat preservation pipe, which comprises an inner pipe, an outer pipe, a heat preservation layer, a connecting cylinder and a sealing ring. The two ends of the inner pipe are respectively provided with a first connecting part and a second connecting part. The cylinder includes a first fitting part, a second fitting part and an annular groove, the first fitting part is connected to the first connecting part, the annular groove is located between the first fitting part and the second fitting part, and the second fitting part is connected to the first connecting part. The connecting part protrudes from the end of the outer tube, and a support plate is arranged between the inner tube and the outer tube, the support plates are arranged at intervals, the sealing ring is clamped in the annular groove, and the sealing ring is located at the end of the inner tube. A prefabricated direct-buried thermal insulation pipe of the present utility model can facilitate the connection of adjacent thermal insulation pipes and effectively improve construction efficiency; at the same time, it can enhance the sealing of the joint and avoid fluid leakage in the pipe; in addition, it can effectively improve the thermal insulation of the joint .

Description

A prefabricated directly buried insulation pipe

technical field

The utility model relates to the technical field of pipelines, in particular to a prefabricated direct-buried thermal insulation pipe.

Background technique

Prefabricated direct-buried thermal insulation pipes are also called prefabricated thermal insulation pipes. The insulation layer and the working tube are closely combined. The insulation layer is usually made of rigid polyurethane foam, which fully fills the gap between the working tube and the outer protection tube, and has a certain bonding strength, so that the working tube, the outer tube and the insulation layer form a solid whole , Polyurethane direct buried insulation pipe foam has good mechanical properties and thermal insulation properties. When the buried pipeline is long, the pipeline needs to be connected, and the existing connection method usually adopts flange connection. However, the connection method is more complicated, and the thermal insulation capacity of the connection is poor.

Utility model content

In order to solve the problems of the prior art, the utility model provides a prefabricated direct-buried thermal insulation pipe capable of improving the connection efficiency of pipelines and improving the thermal insulation and leak-proof performance of the joint.

The specific technical solution is as follows: a prefabricated direct-buried thermal insulation pipe, including an inner pipe, an outer pipe, an insulation layer, a connecting cylinder and a sealing ring, the two ends of the inner pipe are respectively provided with a first connecting portion and a second connecting portion, the The connecting cylinder includes a first fitting part, a second fitting part and an annular groove, the first fitting part is connected to the first connecting part, the annular groove is located between the first fitting part and the second fitting part, and the first fitting part is connected to the first connecting part. The two connecting parts protrude from the end of the outer tube, a support plate is arranged between the inner tube and the outer tube, the support plates are arranged at intervals, the sealing ring is clamped in the annular groove, and the sealing ring is located at the end of the inner tube.

Below is the subsidiary technical scheme of the utility model.

As a preferred solution, the two ends of the outer pipe are provided with raised parts, the prefabricated direct-buried thermal insulation pipe includes a fixed sleeve, and the raised parts of adjacent outer pipes are positioned through the fixed sleeve.

As a preferred solution, the fixing sleeve includes a housing chamber and a pressure plate, the pressure boards are arranged on both sides of the housing chamber, the protrusion protrudes into the housing chamber, and the pressure plate is in close contact with the outer tube.

As a preferred solution, the first connecting portion and the second connecting portion have external threads, the first fitting portion and the second fitting portion have internal threads, and the first connecting portion is threadedly connected to the first fitting portion.

As a preferred solution, the material of the insulation layer is polyurethane.

The technical effect of the utility model: a prefabricated direct-buried thermal insulation pipe of the utility model can facilitate the connection of adjacent thermal insulation tubes, effectively improving construction efficiency; Improved thermal insulation at joints.

Description of drawings

Fig. 1 is a schematic diagram of a prefabricated direct-buried thermal insulation pipe according to an embodiment of the present invention.

Fig. 2 is a perspective view of adjacent prefabricated direct-buried thermal insulation pipes connected in the embodiment of the present invention.

Fig. 3 is a schematic diagram of adjacent prefabricated direct-buried thermal insulation pipes connected in an embodiment of the present invention.

Fig. 4 is a schematic diagram of the fixing sleeve of the embodiment of the present invention.

Detailed ways

Below, the substantive features and advantages of the utility model are further described in conjunction with examples, but the utility model is not limited to the listed embodiments.

As shown in Figures 1 to 4, a prefabricated direct-buried thermal insulation pipe of this embodiment includes an inner pipe 1, an outer pipe 2, a thermal insulation layer 3, a connecting cylinder 4 and a sealing ring 5, and the two ends of the inner pipe 2 are respectively provided with There are a first connection part 21 and a second connection part 22 . The connecting cylinder 4 includes a first fitting portion 41, a second fitting portion 42 and an annular groove 43, the first fitting portion 41 is connected to the first connecting portion 21, and the annular groove is located between the first fitting portion and the second fitting portion. between the joints. The second connecting portion 22 protrudes from the end of the outer tube, and a support plate 6 is provided between the inner tube 1 and the outer tube 2, and the support plates are arranged at intervals. The sealing ring is clamped in the annular groove 43, and the sealing ring is located at the end of the inner tube. In the above technical solution, by setting the connecting cylinder, the adjacent prefabricated direct-buried thermal insulation pipes can be connected through the connecting cylinder. Through the extension of the second connecting part, the second connecting part can be inserted into the second connecting part of the adjacent connecting cylinder, so that the adjacent outer tubes can be closely fitted. After the connection, the first connection part and the second connection part of the two inner pipes are respectively located on both sides of the sealing ring, so as to avoid fluid leakage from the connection; at the same time, the connection can also be covered with the insulation layer, which effectively improves the insulation of the connection performance.

As shown in Figures 1 to 4, in this embodiment, the two ends of the outer pipe are provided with raised parts 23, and the prefabricated direct-buried thermal insulation pipe includes a fixed sleeve 7, and the raised parts of adjacent outer pipes are positioned through the fixed sleeve 7 . Through the above technical solution, two adjacent outer pipes can be fastened through the fixing sleeve to prevent the pipes from loosening.

In this embodiment, the fixing sleeve 7 includes a receiving cavity 71 and a pressing plate 72, the pressing plates are arranged on both sides of the receiving cavity, the protrusion 23 extends into the receiving cavity, and the pressing plate is in close contact with the outer tube. Through the above technical solution, when the fixing sleeve is tightened by the bolt 73, the pressure plate can press the outer tube tightly, thereby preventing the adjacent outer tube from detaching.

In this embodiment, the first connecting portion 21 and the second connecting portion 22 have external threads, the first fitting portion 41 and the second fitting portion 42 have internal threads, and the first connecting portion and the first fitting external threaded connection. Through the above technical proposal, the adjacent insulation pipes can be quickly connected and disassembled. In this embodiment, the material of the insulation layer is polyurethane.

A prefabricated direct-buried thermal insulation pipe in this embodiment can facilitate the connection of adjacent thermal insulation pipes and effectively improve construction efficiency; at the same time, it can enhance the sealing of the joint and avoid fluid leakage in the pipe; in addition, it can effectively improve the thermal insulation of the joint .

It should be pointed out that the above-mentioned preferred embodiments are only to illustrate the technical conception and characteristics of the present utility model, and its purpose is to enable those familiar with this technology to understand the content of the present utility model and implement it accordingly, and not to limit this utility model. Protection scope of utility model. All equivalent changes or modifications made according to the spirit of the utility model shall fall within the protection scope of the utility model.

Claims (5)

1. a kind of prefabricated direct-buried thermal insulation pipe, which is characterized in that described including inner tube, outer tube, insulating layer, connecting cylinder and sealing ring Inner tube both ends are respectively equipped with first connecting portion and second connecting portion, and the connecting cylinder includes the first mating part, the second mating part and Annular groove, the first mating part are connected with first connecting portion, and annular groove is between the first mating part and the second mating part, and described Two connecting portions stretch out outer tube end, and support plate is equipped between inner and outer tubes, and support plate is arranged at intervals, and the sealing ring is fastened on In annular groove, sealing ring is located at inner pipe end.

2. prefabricated direct-buried thermal insulation pipe as described in claim 1, which is characterized in that the outer tube both ends are equipped with lug boss, prefabricated Direct-buried thermal insulation pipe includes fixing sleeve, and the lug boss of adjacent outer tube is positioned by fixing sleeve.

3. prefabricated direct-buried thermal insulation pipe as claimed in claim 2, which is characterized in that the fixing sleeve includes accommodating chamber and pressing plate, Pressing plate is arranged on accommodating chamber both sides, and the lug boss is stretched into accommodating chamber, and pressing plate is close to outer tube.

4. prefabricated direct-buried thermal insulation pipe as claimed in claim 3, which is characterized in that the first connecting portion and second connecting portion tool There is external screw thread, first mating part and the second mating part have internal thread, and first connecting portion is threadedly coupled with the first mating part.

5. prefabricated direct-buried thermal insulation pipe as claimed in claim 4, which is characterized in that the material of the insulating layer is polyurethane.