Underground directly-buried prefabricated thermal insulation pipe capable of being quickly disassembled and assembled
By introducing a quick-assembly and disassembly connection structure into the prefabricated insulated pipes buried underground, the problems of difficult installation and disassembly in the existing technology are solved, and the effect of rapid construction is achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-07
- Publication Date
- 2026-03-13
AI Technical Summary
The existing underground direct-buried prefabricated insulated pipes require a large amount of manual labor for installation and dismantling, and the skills and experience of the workers are highly demanding, which makes it difficult to meet the needs of modern engineering for efficient and rapid construction.
It adopts a quick-release connection structure, including components such as connectors, fixing sleeves, sealing rings and fasteners. Quick installation and disassembly are achieved by releasing the fixing bolts and sliding the sliding parts. Combined with the filling layer and support frame, it provides heat preservation and protection.
This enables rapid installation and disassembly of insulation pipes, reducing the skill and experience requirements for workers and improving construction efficiency.
Smart Images

Figure CN223992065U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of direct-buried insulated pipe technology, and in particular to a prefabricated direct-buried insulated pipe that can be quickly disassembled and assembled. Background Technology
[0002] Direct-buried prefabricated insulated pipes refer to a type of steel pipe with its insulation layer and anti-corrosion coating prefabricated in a factory. After being delivered to the construction site, they can be directly hoisted into the pipe pit, welded, and buried underground without the need for on-site anti-corrosion and insulation treatment. This factory-prefabricated steel pipe approach can reduce budget costs and shorten the construction cycle.
[0003] According to the patent application published on the Internet (authorization announcement number: CN 218378364U), "This utility model discloses an underground direct-buried prefabricated insulated pipe, which relates to the field of direct-buried insulated pipe technology. It includes: an insulated pipe body, with an outer protective pipe slidably fitted onto the outside of the insulated pipe body, and adjacent insulated pipe bodies can be spliced together; a positioning mechanism, which restricts the outer protective pipe to only move along the axial direction of the insulated pipe body; wherein a single outer protective pipe is simultaneously fitted onto two insulated pipe bodies. The beneficial effects of this utility model are: the underground direct-buried prefabricated insulated pipe uses an externally installed outer protective pipe to increase the protection of the insulated pipe body, and after the insulated pipe body is welded, the outer protective pipe can be moved to simultaneously fit onto the outside of two insulated pipe bodies, using the outer protective pipe to protect the weld joint of the two insulated pipe bodies, reducing the probability of damage at the connection point and improving the service life of the insulated pipe body."
[0004] Regarding the above description, the applicant believes the following problems exist: When the device is in use, the outer protective tube increases the protection of the insulation pipe. After the insulation pipe is welded, the outer protective tube can be moved to fit over the outside of the two insulation pipes, thus protecting the weld joint and reducing the chance of damage to the connection, thereby increasing the service life of the insulation pipe. However, the device requires a large amount of manual operation during installation and disassembly, and it also requires high skills and experience from the workers, making it difficult to meet the needs of modern engineering for efficient and rapid construction. Utility Model Content
[0005] To overcome the problem of the device being difficult to install and disassemble quickly.
[0006] The technical solution of this utility model is as follows: a prefabricated insulated pipe for direct burial that can be quickly disassembled and assembled, including a pipe body; it also includes a connector and an insulation component. An insulation component is provided on the outside of the pipe body. A connector is fixedly connected to the left side of the pipe body. A fixing sleeve is fixedly connected to the outside of the connector. A sealing ring is fixedly connected inside the fixing sleeve. A fixing component is fixedly connected to the back of the fixing sleeve. A buckle is bolted to the inside of the fixing component. A fixing bolt is threaded to the inside of the buckle. A rotating component is threaded to the lower part of the buckle. A sliding component is rotatably connected to the end of the rotating component away from the buckle. A sealing ring is fixedly connected to the outside of the sliding component.
[0007] Preferably, the connector has a crescent-shaped groove inside, and the sliding member is slidably connected inside the crescent-shaped groove of the connector.
[0008] Preferably, the fixing sleeve has a threaded hole inside, and the fixing bolt is threaded into the threaded hole of the fixing sleeve.
[0009] Preferably, the fixed sleeve has a through hole inside, and the sliding component is slidably connected inside the through hole of the fixed sleeve.
[0010] Preferably, the fixed sleeve has a groove inside, and the sealing ring slides into the groove of the connector.
[0011] Preferably, the insulation component includes a filling layer, which is fixedly connected to the outside of the pipe body. A support frame is fixedly connected to the outside of the filling layer, an isolation layer is provided inside the support frame, and a protective sleeve is fixedly connected to the outside of the support frame.
[0012] Preferably, a hole is provided on the upper right side of the pipe body, and other sliding parts inside the insulation pipe are slidably connected inside the hole of the pipe body.
[0013] The beneficial effects of this utility model are as follows: the filling material in the filling layer insulates the pipe body, while the support frame supports the protective sleeve, providing protection for the pipe body. The filling layer is isolated by the isolation layer between the support frames to prevent heat loss and achieve efficient heat preservation. By loosening the fixing bolts and releasing the limit of the buckle, the sliding part slides backward, so that the inner wall of the fixing sleeve is exactly the groove of the sliding part. The right end of the other insulation pipe is aligned and inserted into the fixing sleeve, so that the right end hole passes through the groove of the sliding part. The buckle is rotated again and fixed with the fixing bolts, so that the sliding part returns to its original position and locks the right end groove of the other insulation pipe, thus fixing the connection. When disassembling, the fixing bolts are loosened and the sliding part slides again to disassemble the connection, realizing quick installation and disassembly, which helps to solve the problem of difficult quick installation and disassembly of the device. Attached Figure Description
[0014] Figure 1 The diagram shown is a schematic representation of the overall structure of this utility model.
[0015] Figure 2The diagram shown is a schematic representation of the tube structure of this utility model.
[0016] Figure 3 The diagram shown is a schematic representation of the internal structure of the fixing sleeve of this utility model.
[0017] Figure 4 The diagram shown is a cross-sectional view of the present invention.
[0018] Figure 5 The diagram shown is a schematic representation of the thermal insulation component of this utility model.
[0019] Explanation of reference numerals in the attached drawings: 1. Pipe body; 201. Connector; 202. Fixing sleeve; 203. Sealing ring one; 204. Fixing component; 205. Buckle component; 206. Fixing bolt; 207. Rotating component; 208. Sliding component; 209. Sealing ring two; 301. Filling layer; 302. Support frame; 303. Isolation layer; 304. Protective sleeve. Detailed Implementation
[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0021] Please see Figures 1-5This utility model provides an embodiment of a quick-assembly and disassembly prefabricated insulated underground direct-buried pipe, including a pipe body 1; it also includes a connector 201 and an insulation component. The insulation component is installed on the outside of the pipe body 1. The connector 201 is fixedly connected to the left side of the pipe body 1. A fixing sleeve 202 is fixedly connected to the outside of the connector 201. A sealing ring 203 is fixedly connected inside the fixing sleeve 202. A fixing member 204 is fixedly connected to the back of the fixing sleeve 202. A fastener 205 is bolted inside the fastener 204, and a threaded connection is made inside the fastener 205. A fixing bolt 206 and a snap fastener 205 are threadedly connected to a rotating component 207. A sliding component 208 is rotatably connected to the end of the rotating component 207 away from the snap fastener 205. A sealing ring 209 is fixedly connected to the outside of the sliding component 208. By loosening the fixing bolt 206, the snap fastener 205 is released, allowing the sliding component 208 to slide backward. This causes the inner wall of the fixing sleeve 202 to align with the groove of the sliding component 208. The right end of another insulation tube is then aligned and inserted into the fixing sleeve 202, ensuring the right end hole passes through the groove of the sliding component 208. The process is then repeated. Rotate the buckle 205 and fix it with the fixing bolt 206 to return the sliding part 208 to its original position and lock it into the groove on the right end of the other insulation pipe, thus fixing the connection. To disassemble, loosen the fixing bolt 206 and let the sliding part 208 slide again to release the connection, achieving quick installation and disassembly. The connector 201 has a crescent-shaped groove inside, and the sliding part 208 slides inside the crescent-shaped groove of the connector 201. The connector 201 helps to engage with the right-side holes of other insulation pipes. The fixing sleeve 202 has a threaded hole inside. The fixing bolt 206 is threaded into the threaded hole of the fixing sleeve 202, which helps to fix the snap fastener 205. The fixing sleeve 202 has a through hole, and the sliding member 208 is slidably connected inside the through hole of the fixing sleeve 202. The fixing bolt 206 helps to fix the snap fastener 205. The fixing sleeve 202 has a groove, and the sealing ring 209 is grooved into the groove of the connector 201. The sealing ring 209 helps to seal the connection of the pipe body 1.
[0022] Please see Figure 5In this embodiment, the insulation component includes a filling layer 301, which is fixedly connected to the outside of the pipe body 1. A support frame 302 is fixedly connected to the outside of the filling layer 301. An isolation layer 303 is provided inside the support frame 302, and a protective sleeve 304 is fixedly connected to the outside of the support frame 302. The filling material in the filling layer 301 insulates the pipe body 1, making the temperature dissipate more slowly. At the same time, the support frame 302 supports the protective sleeve 304, providing a certain degree of protection for the pipe body 1. The isolation layer 303 between the support frames 302 isolates the filling layer 301, further preventing temperature dissipation and achieving efficient insulation. A hole is opened on the right side of the pipe body 1, and the sliding parts 208 of other insulation pipes are slidably connected inside the hole of the pipe body 1. The hole on the right side of the pipe body 1 facilitates connection with other insulation pipes.
[0023] During operation, the filling material in the filling layer 301 insulates the pipe body 1, while the support frame 302 supports the protective sleeve 304, providing protection for the pipe body 1. The filling layer 301 is isolated by the isolation layer 303 between the support frames 302 to prevent heat loss and achieve efficient insulation. By loosening the fixing bolt 206 and releasing the limit of the buckle 205, the sliding member 208 slides backward, so that the inner wall of the fixing sleeve 202 is exactly the groove of the sliding member 208. The right end of the other insulation pipe is aligned and inserted into the fixing sleeve 202, so that the right end hole passes through the groove of the sliding member 208. The buckle 205 is rotated again and fixed with the fixing bolt 206, so that the sliding member 208 returns to its original position and locks the right end groove of the other insulation pipe, thus fixing the connection. When disassembling, the fixing bolt 206 is released and the sliding member 208 slides again to disassemble the connection, achieving quick installation and disassembly.
[0024] Through the above steps, the filling material in the filling layer 301 insulates the tube body 1, while the support frame 302 supports the protective sleeve 304, providing protection for the tube body 1. The filling layer 301 is isolated by the isolation layer 303 between the support frames 302 to prevent heat loss and achieve efficient heat preservation. By loosening the fixing bolt 206 and releasing the limit of the buckle 205, the sliding member 208 slides backward, so that the inner wall of the fixing sleeve 202 is exactly the groove of the sliding member 208. The right end of the other insulation tube is aligned and inserted into the fixing sleeve 202, so that the right end hole passes through the groove of the sliding member 208. The buckle 205 is rotated again and fixed with the fixing bolt 206, so that the sliding member 208 returns to its original position and locks the right end groove of the other insulation tube, thus fixing the connection. When disassembling, the fixing bolt 206 is loosened and the sliding member 208 slides again to disassemble the connection, realizing quick installation and disassembly, which helps to solve the problem of difficult quick installation and disassembly of the device.
Claims
1. A quick detachable underground directly buried prefabricated thermal insulation pipe, comprising a pipe body (1); characterized in that: It also includes the connecting piece (201) and the heat preservation assembly, the pipe body (1) outside is provided with heat preservation assembly, the pipe body (1) left side fixedly connected with connecting piece (201), connecting piece (201) outside fixedly connected with fixed sleeve (202), fixed sleeve (202) inside fixedly connected with sealing ring one (203), fixed sleeve (202) back fixedly connected with fixed part (204), fixed part (204) inside bolt connection has buckle part (205), buckle part (205) inside screw thread is connected with fixed bolt (206), buckle part (205) lower screw thread is connected with rotating part (207), rotating part (207) away from buckle part (205) one end rotationally connected with sliding part (208), sliding part (208) outside fixedly connected with sealing ring two (209).
2. The quick detachable underground directly buried prefabricated thermal insulation pipe according to claim 1, characterized in that: Connecting piece (201) inside is set up half moon slot, sliding part (208) slidingly connects in connecting piece (201) half moon slot inside.
3. The quick detachable underground directly buried prefabricated thermal insulation pipe according to claim 1, characterized in that: Fixed sleeve (202) inside is set up screw hole, fixed bolt (206) screw thread is connected in fixed sleeve (202) screw hole inside.
4. The quick detachable underground directly buried precast thermal insulation pipe according to claim 1, characterized in that: Fixed sleeve (202) inside is set up through-hole, sliding part (208) slidingly connects in fixed sleeve (202) through-hole inside.
5. The quick detachable underground directly buried prefabricated thermal insulation pipe according to claim 1, characterized in that: Fixed sleeve (202) inside is set up slot, sealing ring two (209) slidingly connects in connecting piece (201) slot inside.
6. The quick detachable underground directly buried precast thermal insulation pipe according to claim 1, characterized in that: The heat preservation assembly includes a filling layer (301), the filling layer (301) is fixedly connected to the outside of the pipe body (1), the filling layer (301) is fixedly connected with the support frame (302) outside, the support frame (302) is provided with an isolation layer (303) inside, the support frame (302) is fixedly connected with the protective sleeve (304) outside.
7. The quick detachable underground directly buried precast thermal insulation pipe according to claim 6, characterized in that: The pipe body (1) right side is set up hole, other heat preservation pipe inside sliding part (208) slidingly connects in pipe body (1) hole inside.
Citation Information
Patent Citations
Underground directly-buried prefabricated thermal insulation pipe
CN218378364U