Fabricated steel heat-insulating smoke-preventing pipe
By designing the connector and slot, and combining the structure of the sealing sleeve, support hoop, and fixing hoop, the problems of oil fume adhesion on the inner wall of the stainless steel flue and smoke leakage at the splice are solved, achieving rapid splicing and improved sealing, and extending the service life of the insulation cotton.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- FUJIAN SHANRONG HIGH-TECH MATERIALS CO LTD
- Filing Date
- 2025-09-12
- Publication Date
- 2026-07-24
AI Technical Summary
Oil fumes and dust easily adhere to the inner wall of stainless steel flue pipes, affecting smoke exhaust efficiency. Furthermore, smoke leakage and separation are prone to occur at the joints of the flue pipes, affecting their sealing performance.
The design employs a plug-in connector and plug groove, combined with a sealing sleeve, support hoop, and fixing hoop structure. Through the cooperation of the limiting ring, fixing seat, and tensioning bolt, the flue pipe can be quickly spliced and tightened, enhancing the sealing performance.
It enables rapid splicing and sealing of flue pipes, avoids flue pipe separation, improves smoke exhaust efficiency and sealing performance, and extends the service life of insulation cotton.
Smart Images

Figure CN224551014U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of flue pipes, specifically a prefabricated steel heat-insulated flue pipe. Background Technology
[0002] Stainless steel exhaust pipes are commonly used for guiding kitchen fumes. However, grease and fumes tend to accumulate on the inner walls of these pipes, mixing with dust and causing safety and hygiene issues. This also affects the efficiency of smoke extraction. Therefore, cleaning the inner walls of stainless steel exhaust pipes is crucial.
[0003] When installing flue pipes, they are spliced together using a socket joint, which can easily lead to smoke leakage. In addition, when the flue pipes are installed vertically on the wall, their own weight will exert a downward force, causing the flue pipes to sag and the socket joints to separate, which seriously affects the sealing performance of the flue pipes during use. To solve the above problems, this application proposes a prefabricated steel insulated flue pipe. Utility Model Content
[0004] (I) Purpose of the utility model
[0005] To address the technical problems existing in the background art, this utility model proposes an assembled steel heat-insulated flue pipe. The flue pipe joints are sealed using a sealing sleeve. After the flue pipes are assembled, the supporting hoops on the fixing clamps abut together, and the sealing gaskets abut against each other, forming a closed structure with the supporting hoops. This further improves the sealing performance of the flue pipe joints. Simultaneously, the second fixing seat, in conjunction with the tightening bolts, can tighten the flue pipe, preventing it from separating during use, thus solving the problems mentioned in the background art.
[0006] (II) Technical Solution
[0007] To solve the above-mentioned technical problems, this utility model provides an assembled steel heat-insulated smoke exhaust pipe, including a smoke pipe, a plug and a plug groove. One end of the smoke pipe is integrally formed with a plug, and the other end of the smoke pipe has a plug groove on its inner wall. When the smoke pipe is spliced, the plug and the plug groove are inserted into each other. The surface of the smoke pipe is covered with heat insulation cotton, and an opening is opened on the heat insulation cotton to make the heat insulation cotton have a C-shaped structure.
[0008] Both ends of the flue are provided with limiting rings, and both ends of the flue are provided with fixing hoops at positions corresponding to the limiting rings;
[0009] The fixing hoop has a uniform, integrally formed support hoop on its surface, and the surfaces of the support hoop abut against each other when the flue pipes are spliced.
[0010] Preferably, the surface of the heat insulation cotton is provided with a spiral waterproof strip, which is spirally wound around the surface of the heat insulation cotton.
[0011] Preferably, the fixing hoop has a semi-circular structure, and the two sets of fixing hoops form a circular structure and abut against the limiting ring.
[0012] Preferably, both ends of the fixing hoop are integrally formed with a first fixing seat, and the first fixing seat is provided with a fixing bolt.
[0013] Preferably, the support hoop has a semi-circular structure, and the two sets of support hoop form a circular structure.
[0014] Preferably, each of the support hoops has a sealing gasket attached to its surface, and the sealing gaskets are pressed together when two adjacent sets of support hoops abut against each other.
[0015] Preferably, each of the support hoops has a second fixing seat welded to its center, and tension bolts are inserted into adjacent sets of the second fixing seats.
[0016] Preferably, a sealing sleeve is provided on the surface of the plug, and the sealing sleeve abuts against the inner wall of the plug groove after the plug and the plug groove are inserted.
[0017] The above-mentioned technical solution of this utility model has the following beneficial technical effects:
[0018] 1. In this utility model, the two ends of the flue pipe are connected to each other by plug-in joints and plug-in grooves, which can realize the rapid splicing of the flue pipe. The surface of the plug-in joint is covered with a sealing sleeve, which abuts against the inner wall surface of the plug-in groove. The joint of the flue pipe can be sealed by the sealing sleeve. After the flue pipe is spliced, the support hoops on the fixing hoop abut together, and the sealing gaskets abut against each other, so that the support hoops form a closed structure, which can further improve the sealing performance of the flue pipe connection.
[0019] 2. In this utility model, limiting rings are provided on both ends of the flue pipe. The fixing hoop can be limited by the limiting rings. The two ends of the fixing hoop are fixed to the two ends of the flue pipe by the first fixing seat and the fixing bolt. The flue pipe can be tightened by the second fixing seat and the tensioning bolt to prevent the flue pipe from separating during use. Attached Figure Description
[0020] Figure 1 This is a schematic diagram of the overall structure of an assembled steel heat-insulated smoke exhaust pipe according to the present invention;
[0021] Figure 2 This is a cross-sectional structural diagram of an assembled steel heat-insulated smoke exhaust pipe according to the present invention.
[0022] Figure 3 This is a schematic diagram of the flue structure of a prefabricated steel heat-insulated smoke exhaust pipe according to the present invention;
[0023] Figure 4 This is a schematic diagram of the fixing hoop structure of a prefabricated steel heat-insulating smoke exhaust pipe according to the present invention;
[0024] Figure 5 This is an exploded view of the fixing hoop structure of a prefabricated steel heat-insulating smoke exhaust pipe according to this utility model;
[0025] Figure 6 This is a schematic diagram of the insulation cotton structure of an assembled steel insulated smoke exhaust pipe according to this utility model.
[0026] Figure label:
[0027] 1. Smoke pipe; 2. Connector; 3. Connector groove; 4. Insulation cotton; 5. Spiral waterproof tape; 6. Limiting ring; 7. Fixing hoop; 8. First fixing seat; 9. Fixing bolt; 10. Support hoop; 11. Sealing gasket; 12. Second fixing seat; 13. Tightening bolt; 14. Sealing sleeve. Detailed Implementation
[0028] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this utility model. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of this utility model.
[0029] like Figure 1-6 As shown, the present invention proposes an assembled steel heat-insulated smoke exhaust pipe, including a smoke pipe 1, a plug 2 and a plug groove 3. One end of the smoke pipe 1 is integrally formed with a plug 2, and the other end of the smoke pipe 1 has a plug groove 3 on its inner wall. When the smoke pipe 1 is spliced, the plug 2 and the plug groove 3 are inserted into each other. The surface of the smoke pipe 1 is covered with heat insulation cotton 4, and the heat insulation cotton 4 has an opening so that the heat insulation cotton 4 has a C-shaped structure.
[0030] Both ends of the flue pipe 1 are provided with limiting rings 6, and both ends of the flue pipe 1 are provided with fixing hoops 7 at positions corresponding to the limiting rings 6;
[0031] The surface of the fixing hoop 7 is uniformly and integrally formed with a support hoop 10, and the surfaces of the support hoop 10 abut against each other when the smoke pipe 1 is spliced.
[0032] It should be noted that the two ends of the flue pipe 1 are connected to the insertion groove 3 through the plug connector 2, which can realize the quick splicing of the flue pipe 1. The surface of the plug connector 2 is covered with a sealing sleeve 14, which abuts against the inner wall surface of the insertion groove 3. The joint of the flue pipe 1 can be sealed by the sealing sleeve 14. The two ends of the flue pipe 1 are provided with limiting rings 6. The fixing hoop 7 can be limited by the limiting rings 6. The two ends of the fixing hoop 7 are fixed to the two ends of the flue pipe 1 by the first fixing seat 8 and the fixing bolt 9. The second fixing seat 12 is used in conjunction with the tensioning bolt 13 to tighten the flue pipe 1 and prevent the flue pipe from separating during use.
[0033] In this embodiment, as Figure 5 As shown, the surface of the heat insulation cotton 4 is provided with a spiral waterproof strip 5, which is spirally wound around the surface of the heat insulation cotton 4.
[0034] It should be noted that the heat insulation cotton 4 is fitted onto the surface of the flue pipe 1, and the spiral waterproof tape 5 is wrapped around the surface of the heat insulation cotton 4, which can quickly fix the heat insulation cotton 4. The heat insulation cotton 4 can improve the heat insulation of the flue pipe 1 during use, while the spiral waterproof tape 5 can play a waterproof role and extend the service life of the heat insulation cotton 4.
[0035] In this embodiment, as Figure 4 As shown, the fixing hoop 7 has a semi-circular structure, and the two sets of fixing hoops 7 form a circular structure and abut against the limiting ring 6. Both ends of the fixing hoop 7 are integrally formed with a first fixing seat 8, and the first fixing seat 8 is provided with a fixing bolt 9. The support hoop 10 has a semi-circular structure, and the two sets of support hoops 10 form a circular structure.
[0036] It should be noted that the fixing hoop 7 can be limited by the limiting ring 6, and the two ends of the fixing hoop 7 are fixed to the two ends of the flue pipe 1 by the first fixing seat 8 and the fixing bolt 9.
[0037] In this embodiment, as Figure 3 As shown, each of the support hoops 10 has a sealing gasket 11 attached to its surface, and the sealing gaskets 11 are attached together when two adjacent sets of support hoops 10 abut against each other.
[0038] It should be noted that after the flue pipe 1 is spliced, the support clamps 10 on the fixing clamp 7 abut together, and the sealing gaskets 11 abut against each other, so that the support clamps 10 form a closed structure, which can further improve the sealing performance of the connection of the flue pipe 1.
[0039] In this embodiment, as Figure 3 As shown, a sealing sleeve 14 is provided on the surface of the plug 2. After the plug 2 and the plug groove 3 are plugged in, the sealing sleeve 14 abuts against the inner wall of the plug groove 3.
[0040] It should be noted that a sealing sleeve 14 is fitted on the surface of the plug 2. The sealing sleeve 14 abuts against the inner wall surface of the plug groove 3 and can seal the joint of the flue 1 through the sealing sleeve 14.
[0041] The working principle and usage of this utility model are as follows: The two ends of the flue pipe 1 are connected to the insertion slots 3 via connectors 2, enabling rapid assembly of the flue pipe 1. A sealing sleeve 14 is fitted onto the surface of the connector 2, abutting against the inner wall of the insertion slot 3. The sealing sleeve 14 seals the joint of the flue pipe 1. Limiting rings 6 are provided on the surface of both ends of the flue pipe 1, and fixing clamps 7 are limited by the limiting rings 6. The two ends of the fixing clamps 7 are fixed to the two ends of the flue pipe 1 by a first fixing seat 8 and a fixing bolt 9. The second fixing seat 12, in conjunction with a tension bolt 13, can further secure the flue pipe. The pipe 1 is tightened to prevent the flue pipe from separating during use. After the flue pipe 1 is spliced, the support clamps 10 on the fixing clamp 7 abut together, and the sealing gaskets 11 abut against each other. The sealing gaskets 11 have a U-shaped structure, so that the support clamps 10 form a closed structure, which can further improve the sealing of the connection of the flue pipe 1. The heat insulation cotton 4 is sleeved on the surface of the flue pipe 1, and the spiral waterproof tape 5 is wrapped around the surface of the heat insulation cotton 4, which can quickly fix the heat insulation cotton 4. The heat insulation cotton 4 can improve the heat insulation of the flue pipe 1 during use, while the spiral waterproof tape 5 can waterproof and extend the service life of the heat insulation cotton 4.
[0042] It should be understood that the above-described specific embodiments of this utility model are merely illustrative or explanatory of the principles of this utility model and do not constitute a limitation thereof. Therefore, any modifications, equivalent substitutions, improvements, etc., made without departing from the spirit and scope of this utility model should be included within the protection scope of this utility model. Furthermore, the appended claims are intended to cover all variations and modifications falling within the scope and boundaries of the appended claims or their equivalents.
Claims
1. A prefabricated steel insulated smoke exhaust pipe, comprising a smoke pipe (1), a connector (2), and a connector groove (3), wherein one end of the smoke pipe (1) is integrally formed with a connector (2), and the other end of the smoke pipe (1) has a connector groove (3) formed on its inner wall; when the smoke pipe (1) is assembled, the connector (2) and the connector groove (3) are inserted into each other, characterized in that, The surface of the flue (1) is covered with heat insulation cotton (4), and the heat insulation cotton (4) has an opening so that the heat insulation cotton (4) has a C-shaped structure; The surface of both ends of the flue (1) is provided with limiting rings (6), and the surface of both ends of the flue (1) is provided with fixing hoops (7) at the corresponding positions of the limiting rings (6); The fixing hoop (7) has a support hoop (10) uniformly and integrally formed on its surface, and the surfaces of the support hoop (10) abut against each other when the smoke pipe (1) is spliced.
2. The prefabricated steel heat-insulated smoke exhaust pipe according to claim 1, characterized in that, The surface of the heat insulation cotton (4) is provided with a spiral waterproof strip (5), which is spirally wrapped around the surface of the heat insulation cotton (4).
3. The prefabricated steel heat-insulated smoke exhaust pipe according to claim 2, characterized in that, The fixing hoop (7) has a semi-circular structure, and the two sets of fixing hoops (7) form a circular structure and abut against the limiting ring (6).
4. The prefabricated steel heat-insulated smoke exhaust pipe according to claim 3, characterized in that, Both ends of the fixing hoop (7) are integrally formed with a first fixing seat (8), and the first fixing seat (8) is provided with a fixing bolt (9).
5. A prefabricated steel heat-insulated smoke exhaust pipe according to claim 4, characterized in that, The support hoop (10) has a semi-circular structure, and the two sets of support hoop (10) form a circular structure.
6. The prefabricated steel heat-insulated smoke exhaust pipe according to claim 5, characterized in that, Each of the support hoops (10) has a sealing gasket (11) pasted on its surface. When two adjacent sets of support hoops (10) come into contact with each other, the sealing gasket (11) is pressed together.
7. A prefabricated steel heat-insulated smoke exhaust pipe according to claim 6, characterized in that, Each of the support hoops (10) has a second fixing seat (12) welded to its middle part, and a tension bolt (13) is inserted into each of the two adjacent sets of the second fixing seats (12).
8. A prefabricated steel heat-insulated smoke exhaust pipe according to claim 7, characterized in that, The surface of the connector (2) is fitted with a sealing sleeve (14). After the connector (2) and the insertion groove (3) are inserted, the sealing sleeve (14) abuts against the inner wall of the insertion groove (3).