Large-pipe-diameter prefabricated directly-buried thermal insulation pipe

Abstract

The utility model discloses a large-pipe-diameter prefabricated direct burial thermal insulation pipe, which comprises a shell and a thermal insulation layer installed in the shell, an inner pipe is arranged in the thermal insulation layer, bases are arranged on the circular outer wall of the lower end of the inner pipe and close to the front side and the rear side respectively, and the outer walls of the upper ends of the two bases are fixedly connected with limiting strips. By installing the limiting strips and the bases, when the position of the heat preservation pipe is limited, the bases can be placed on the front side and the rear side of the inner pipe correspondingly, the heat preservation pipe is supported, the position of the heat preservation pipe is limited, the longitudinal position and the transverse position of the heat preservation pipe are kept in an assisted mode, the pipe is prevented from deviating due to external force, and the outer side of the heat preservation pipe can be prevented from making contact with the ground; and when the thermal insulation pipe is transferred, the pulling rope can be conveniently sleeved on the shell to be transferred, and the situation that the inner pipe independently bears the overall weight and the exposed part of the inner pipe is bent in the transferring process due to the fact that the pulling rope is sleeved on the inner pipe is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field related to thermal insulation pipes, and particularly relates to a large-diameter prefabricated directly buried thermal insulation pipe. Background Art

[0002] Large-diameter prefabricated direct-buried insulated pipes are an insulated piping system used for heating, cooling, and industrial piping. These pipes typically consist of an inner pipe layer, an insulation layer, and an outer protective shell. They are primarily used to transmit heat while effectively reducing energy loss. However, when multiple insulated pipes are stacked together during storage, the lower high-temperature pipes are often secured against the wall or secured with concrete piers. This approach creates significant inconvenience when relocating the pipes and increases production costs. Utility Model Content

[0003] The purpose of the present invention is to provide a large-diameter prefabricated direct-buried insulated pipe to solve the problem raised in the above-mentioned background technology that during storage, when multiple insulated pipes are stacked together, the high-temperature pipes in the lower layer are usually abutted against the wall or a limiting cement pier is built to limit the position of the insulated pipe.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a large-diameter prefabricated direct-buried thermal insulation pipe, comprising an outer shell and an insulation layer installed inside the outer shell;

[0005] An inner tube is provided inside the thermal insulation layer;

[0006] The circular outer wall at the lower end of the inner tube is provided with a base close to the front and rear sides respectively, and the upper outer walls of the two bases are fixedly connected to the limiting strip.

[0007] Preferably, threaded rods are screwed inside the lower outer walls of the two bases and close to the left and right sides respectively, and the lower outer walls of the two threaded rods are fixedly connected with supporting feet to be used with the threaded rods to adjust the position according to the ground with different curvatures.

[0008] Preferably, front-to-back through openings are provided inside the front end outer walls of the two bases and close to the left and right sides respectively to provide gripping positions for staff, and arc-shaped grooves are provided on the lower end outer walls of the two bases.

[0009] Preferably, threaded holes for threaded rods to be screwed into are provided inside the outer walls of the lower ends of the two bases, close to the left and right sides respectively, and the limiting strips are made of soft rubber material.

[0010] Preferably, the circular inner wall of the inner tube is provided with a support plate, and a reinforcing rib is fixedly connected at the center of the circular inner wall of the support plate to support the area of ​​the insulation tube that is under greater pressure together with the support plate.

[0011] Preferably, the outer walls at both ends of the reinforcing rib are fixedly connected with guide blocks to guide the flow of gas or liquid, and a plurality of water openings running through left and right are equidistantly provided inside the two guide blocks and the reinforcing rib.

[0012] Preferably, the support plate, the guide block and the reinforcing rib are integrally die-cast, and the two guide blocks are both in the shape of a right triangle and are symmetrical with the reinforcing rib as the central axis.

[0013] Preferably, the insulation layer is made of polyurethane foam material, and the outer shell and inner tube are made of polyethylene material and stainless steel material respectively.

[0014] Compared with the existing technology, the utility model provides a large-diameter prefabricated direct-buried thermal insulation pipe with the following beneficial effects:

[0015] 1. By installing the limit strips and the base, when limiting the position of the insulation pipe, the base can be placed on the front and rear sides of the inner pipe respectively, and the inner pipe can be contacted by the limit strips. Under the height limit of the base, the insulation pipe can be lifted up to limit the position of the insulation pipe, helping to maintain the longitudinal and lateral positions of the insulation pipe and prevent the pipe from being offset due to external forces. In the lifting process, the contact between the outside of the insulation pipe and the ground can be avoided to avoid wear. When transferring the insulation pipe, the traction rope can be portable and put on the outer shell for transfer to avoid being put on the inner pipe, which prevents the inner pipe from bearing the overall weight alone during the transfer process, causing the leakage part of the inner pipe to bend.

[0016] 2. By installing support plates and reinforcement ribs, when the insulation pipe is buried underground, the support plates and reinforcement ribs can be moved to the corresponding position of the inner pipe for support according to the upper weight of the buried area. The support plates can distribute the weight above to a larger area, reducing the direct pressure on the inner pipe. The position of the support plates and reinforcement ribs can be flexibly adjusted according to different burial depths and soil conditions to ensure optimal contact with the inner pipe, reduce damage to the pipe caused by external factors during use, and thus extend the service life of the pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of a large-diameter prefabricated directly buried thermal insulation pipe of the present utility model.

[0018] Figure 2 This is a schematic diagram of the structure of a large-diameter prefabricated directly buried thermal insulation pipe of the present utility model.

[0019] Figure 3 This is a schematic diagram of the partial structure of a large-diameter prefabricated directly buried thermal insulation pipe of the present invention.

[0020] Figure 4This is a schematic diagram of the partial structure of a large-diameter prefabricated directly buried thermal insulation pipe in a top view according to the present invention.

[0021] In the figure: 1. Outer shell; 2. Insulation layer; 3. Inner tube; 4. Limiting strip; 5. Base; 6. Through port; 7. Arc groove; 8. Support foot; 9. Threaded rod; 10. Support plate; 11. Guide block; 12. Reinforcement rib; 13. Water outlet. DETAILED DESCRIPTION

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

[0023] The utility model provides Figure 1-4 The large-diameter prefabricated direct-buried thermal insulation pipe shown includes an outer shell 1 and an insulation layer 2 installed inside the outer shell 1;

[0024] An inner tube 3 is installed inside the insulation layer 2. The insulation tube is buried in the corresponding soil and welded. When the fluid is transported in the inner tube 3, heat is transferred to the insulation layer 2 through the wall of the inner tube 3. The presence of the insulation layer 2 effectively reduces heat loss to the outside. The outer shell 1 provides physical protection for the insulation layer 2 and the inner tube 3, preventing damage to the pipeline from mechanical collisions, soil pressure, water erosion, etc., thereby ensuring the long-term stable operation of the system.

[0025] The circular outer wall at the lower end of the inner tube 3 is provided with a base 5 near the front and rear sides respectively. The upper outer walls of the two bases 5 are fixedly connected to the limiting strips 4. When limiting the position of the insulation pipe, the two bases 5 can be placed on the ground on the front and rear sides of the inner tube 3 according to the length of the insulation pipe. Then the insulation pipe can be lifted and placed on the two bases 5. It will be supported by the limiting strips 4 to increase friction.

[0026] like Figure 3 As shown, threaded rods 9 are screwed inside the outer walls of the lower ends of the two bases 5 and close to the left and right sides respectively. The outer walls of the lower ends of the two threaded rods 9 are fixedly connected with supporting feet 8 to match the threaded rods 9 for use in adjusting the position according to the ground with different curvatures. The front end outer walls of the two bases 5 are internally provided with front and rear through-openings 6 close to the left and right sides respectively to provide a gripping position for the staff, and the lower end outer walls of the two bases 5 are provided with arc grooves 7.

[0027] When the insulation pipe is supported by the base 5, the threaded rod 9 can be rotated by rotating the support leg 8 counterclockwise to move the support leg 8 downward. The contact position of the support leg 8 can be adjusted according to the flatness of the ground to keep the base 5 stable. When moving the position of the base 5, the base 5 can be grasped through the opening 6 to drive the base 5 to move to any position. The placement space of the base 5 can be increased by the arc groove 7, and it can also be placed on uneven ground.

[0028] like Figure 3 As shown, threaded holes for threaded rods 9 to be screwed into are provided inside the outer walls of the lower ends of the two bases 5 and close to the left and right sides respectively, and the limiting strips 4 are made of soft rubber material.

[0029] The threaded hole can limit the position of the threaded rod 9. When the support leg 8 is rotated in different directions, the support leg 8 can be moved up when rotating clockwise, and can be moved down when rotating counterclockwise. The limit strip 4 made of soft rubber material has a certain resilience. When the inner tube 3 is pressed on the limit strip 4, the rupture of the limit strip 4 caused by long-term pressure can be avoided.

[0030] like Figure 4 As shown, the circular inner wall of the inner tube 3 is provided with a support plate 10, and a reinforcing rib 12 is fixedly connected at the center of the circular inner wall of the support plate 10 to support the area of ​​the insulation pipe under greater pressure together with the support plate 10. The outer walls of the left and right ends of the reinforcing rib 12 are fixedly connected with guide blocks 11 to guide the flow of gas or liquid. A plurality of water openings 13 that pass through the two guide blocks 11 and the reinforcing rib 12 are equidistantly provided inside.

[0031] After the insulation pipe is buried underground, the support plate 10 can be fixed inside the inner tube 3 at the corresponding position according to the weight of the soil covering the upper side of the insulation pipe and the objects or buildings placed thereon. The support plate 10 is matched with the reinforcement ribs 12 to increase the supporting force during support. When the flow media circulates inside the inner tube 3, the flow of the flow media can be guided by the guide block 11, and the flow media can pass through the inside of the water outlet 13, thereby reducing the speed at which the support plate 10 and the reinforcement ribs 12 affect the flow of the flow media.

[0032] like Figure 4 As shown, the support plate 10, the guide block 11 and the reinforcing rib 12 are integrally die-cast, and the two guide blocks 11 are both in the shape of a right triangle and are symmetrical with the reinforcing rib 12 as the central axis.

[0033] The support plate 10, guide block 11 and reinforcing rib 12, which are integrally die-cast, have high hardness and strength. The two symmetrical guide blocks 11 can guide the streaming media in different directions on the left and right sides. The support plate 10 and the inner tube 3 are fixedly connected with a waterproof adhesive.

[0034] like Figure 1 As shown, the insulation layer 2 is made of polyurethane foam material, and the outer shell 1 and the inner tube 3 are made of polyethylene material and stainless steel material respectively.

[0035] The insulation layer 2 supported by polyurethane foam material has excellent thermal insulation performance, can effectively reduce heat loss, and is suitable for high temperature environments. The outer shell 1 made of polyethylene material has good corrosion resistance and UV resistance, and is suitable for underground use. The inner tube 3 supported by stainless steel material has high strength and pressure resistance, and is suitable for high temperature and high pressure application scenarios.

[0036] The implementation principle of this embodiment is as follows: bury the insulation pipe in the corresponding land and weld it. When the fluid is transported in the inner pipe 3, the heat is conducted to the insulation layer 2 through the wall of the inner pipe 3. The presence of the insulation layer 2 effectively reduces the loss of heat to the outside. The outer shell 1 provides physical protection for the insulation layer 2 and the inner pipe 3 to prevent damage to the pipeline caused by mechanical collision, soil pressure, water erosion, etc., thereby ensuring the long-term stable operation of the system. When limiting the position of the insulation pipe, the two bases 5 can be placed on the ground on the front and back sides of the inner pipe 3 according to the length of the insulation pipe. Then, the insulation pipe can be lifted and placed on the two bases 5. It will be supported by the limit bar 4 to increase friction.

[0037] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A large-diameter prefabricated direct-buried thermal insulation pipe, comprising an outer shell (1) and an insulation layer (2) installed inside the outer shell (1); An inner tube (3) is provided inside the thermal insulation layer (2); Its characteristics are: Bases (5) are provided on the circular outer wall of the lower end of the inner tube (3) and close to the front and rear sides respectively, and the upper outer walls of the two bases (5) are fixedly connected to the limiting strips (4).

2. The large-diameter prefabricated direct-buried thermal insulation pipe according to claim 1, characterized in that: Threaded rods (9) are screwed into the inner part of the lower end outer walls of the two bases (5) and close to the left and right sides respectively. The lower end outer walls of the two threaded rods (9) are fixedly connected with supporting feet (8) to match the threaded rods (9) and adjust the position according to the ground with different curvatures.

3. The large-diameter prefabricated direct-buried thermal insulation pipe according to claim 1, characterized in that: Front and rear through-openings (6) are provided inside the front end outer walls of the two bases (5) and close to the left and right sides respectively to provide gripping positions for staff, and arc-shaped grooves (7) are provided on the lower end outer walls of the two bases (5).

4. The large-diameter prefabricated direct-buried thermal insulation pipe according to claim 1, characterized in that: Threaded holes for threaded engagement of the threaded rods (9) are provided inside the outer walls of the lower ends of the two bases (5) and close to the left and right sides respectively. The limiting strips (4) are made of soft rubber material.

5. The large-diameter prefabricated direct-buried thermal insulation pipe according to claim 1, characterized in that: The circular inner wall of the inner tube (3) is provided with a support plate (10), and a reinforcing rib (12) is fixedly connected at the center of the circular inner wall of the support plate (10) to support the area of ​​the insulation tube that is under greater pressure together with the support plate (10).

6. The large-diameter prefabricated direct-buried thermal insulation pipe according to claim 5, characterized in that: The outer walls of the left and right ends of the reinforcing rib (12) are fixedly connected with guide blocks (11) to guide the circulation of gas or liquid, and a plurality of water openings (13) are uniformly spaced and opened inside the two guide blocks (11) and the reinforcing rib (12).

7. The large-diameter prefabricated direct-buried thermal insulation pipe according to claim 5, characterized in that: The support plate (10), the guide block (11) and the reinforcing rib (12) are integrally die-cast, and the two guide blocks (11) are both in the shape of a right triangle and are symmetrical with the reinforcing rib (12) as the central axis.

8. The large-diameter prefabricated direct-buried thermal insulation pipe according to claim 1, characterized in that: The heat-insulating layer (2) is made of polyurethane foam material, and the outer shell (1) and the inner tube (3) are made of polyethylene material and stainless steel material, respectively.

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