A leak prevention device for boiler superheater outlet header
By attaching an insulation shell to the outside of the branch pipe of the boiler superheater outlet header and using a heat-conducting film to conduct heat, the leakage problem caused by temperature difference is solved, and stable heating of the branch pipe end and convenient installation are achieved.
Patent Information
- Application Number
- CN202522337774.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-04
- Publication Date
- 2026-11-06
- Estimated Expiration
- 2035-11-04
AI Technical Summary
Leakage problems arise when the branch pipe ends of the boiler superheater outlet header crack or separate due to the temperature difference between the inside and outside.
The structure adopts a heat-insulating shell, which contacts the outer wall of the branch pipe through a heat-conducting film. Heat is injected into the flow cavity through heat input and output pipes to reduce the temperature difference between the inside and outside of the branch pipe. Combined with magnetic block connection and buffer pad, it can improve the ease of installation and stability.
It effectively reduces the temperature difference at the end of the branch pipe, reduces the risk of leakage, and improves the operational stability and convenience of the device.
Smart Images
Figure CN224944755U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of boiler superheater technology, and in particular to a leak-proof device for boiler superheater outlet header. Background Technology
[0002] The superheater outlet header is a key device in a boiler system used to collect and distribute superheated steam. Its main function is to concentrate the steam generated by the superheater and distribute it to subsequent pipelines or equipment. It is usually made of seamless steel pipe, with one end connected to the superheater serpentine tube bundle and the other end connected to the boiler's main steam pipeline or the turbine's high-pressure cylinder. Through multiple connected branch pipes, it ensures the unified collection and distribution of steam.
[0003] However, since the steam flowing in the outlet header and branch pipes is usually high-temperature steam, if the outside temperature is too low, the thermal expansion and contraction caused by the temperature difference between the inside and outside will easily cause the connection between the end of the branch pipe and the outlet header to crack or separate due to uneven stress after a long period of operation, resulting in leakage of the outlet header and affecting the normal operation of the superheater equipment. Utility Model Content
[0004] The technical problem to be solved by this utility model is to provide a leak-proof device for the boiler superheater outlet header, which can reduce the internal and external temperature difference at the end of the branch pipe and reduce the probability of leakage at that location.
[0005] The technical solution adopted by this utility model is as follows: a leak-proof device for the outlet header of a boiler superheater is provided, including an outlet header body and a branch pipe connected thereto. A heat insulation shell is correspondingly sleeved on the outer side of the end of the branch pipe. The heat insulation shell is fixedly connected to the branch pipe by a fixing member. A flow cavity is correspondingly opened inside the heat insulation shell. The flow cavity is separated from the outer wall of the branch pipe by a heat-conducting film made of high-temperature resistant material. The heat-conducting film is fixed to the heat insulation shell and seals the flow cavity. The heat-conducting film is in corresponding contact with the outer wall of the branch pipe. A heat input pipe and a heat output pipe are respectively connected to the outer side of the heat insulation shell.
[0006] To further optimize this technical solution, the insulation shell of a boiler superheater outlet header anti-leakage device is composed of two mutually separated installation half-shells; the flow cavities inside the two installation half-shells are respectively sealed by corresponding heat-conducting membranes; the two installation half-shells are closed and surround the outside of the branch pipe; the flow cavities inside the two installation half-shells are connected by a conductive hose.
[0007] To further optimize this technical solution, a mounting half-shell of a boiler superheater outlet header leak prevention device is fixed with a hole seat on its outer wall; the corresponding hole seats on the two mounting half-shells are connected by a positioning pin.
[0008] To further optimize this technical solution, the heat input pipe and heat output pipe of a boiler superheater outlet header anti-leakage device are respectively connected to different mounting half-shells.
[0009] To further optimize this technical solution, a buffer pad for abutting against the outer wall of the outlet header body is fixed at the upper end of the installation half shell of a boiler superheater outlet header anti-leakage device.
[0010] To further optimize this technical solution, the outer wall of the installation half-shell of a boiler superheater outlet header anti-leakage device is fitted with a heat insulation layer.
[0011] To further optimize this technical solution, a fixing component for a boiler superheater outlet header anti-leakage device includes magnetic blocks respectively fixed on the mounting half-shell; the magnetic blocks are magnetically connected to the outer wall of the branch pipe.
[0012] The beneficial effects of this utility model are as follows: The insulation shell has a corresponding flow cavity inside, which is separated from the outer wall of the branch pipe by a heat-conducting film. The heat-conducting film is fixed to the insulation shell and seals the flow cavity. The heat-conducting film is in contact with the outer wall of the branch pipe. The outside of the insulation shell is connected to a heat input pipe and a heat output pipe. Hot water or high-temperature steam can be injected into the flow cavity through the heat input pipe. Through the heat conduction of the heat-conducting film, the end of the outer wall of the branch pipe can be heated, reducing the temperature difference between the inside and outside of the branch pipe. This reduces the probability of cracking or separation at that location due to excessive temperature difference, which could lead to leakage. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the axial cross-section of the thermal insulation shell; Figure 3 This is a schematic diagram of the radial cross-section of the thermal insulation shell.
[0014] In the diagram, 1. Outlet header body; 2. Branch pipe; 3. Insulation shell; 4. Flow cavity; 5. Heat-conducting film; 6. Heat input pipe; 7. Heat output pipe; 8. Mounting half shell; 9. Conductive hose; 10. Hole seat; 11. Positioning pin; 12. Buffer pad; 13. Insulation layer; 14. Magnetic block. Detailed Implementation
[0015] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.
[0016] like Figure 1-3As shown, a leak-proof device for the outlet header of a boiler superheater includes an outlet header body 1 and a branch pipe 2 connected thereto. A heat insulation shell 3 is fitted onto the outer side of the end of the branch pipe 2. The heat insulation shell 3 is fixedly connected to the branch pipe 2 by a fixing member. A flow cavity 4 is correspondingly opened inside the heat insulation shell 3. The flow cavity 4 is separated from the outer wall of the branch pipe 2 by a heat-conducting film 5 made of high-temperature resistant material. The heat-conducting film 5 is fixed to the heat insulation shell 3 and seals the flow cavity 4. The heat-conducting film 5 is in contact with the outer wall of the branch pipe 2. A heat input pipe 6 and a heat output pipe 7 are respectively connected to the outer side of the heat insulation shell 3.
[0017] In this scheme, hot water or high-temperature steam can be injected into the flow cavity 4 through the heat input pipe 6 as a heat source (the waste heat of the boiler can be utilized). Through the heat conduction of the heat-conducting film 5, the temperature of the end of the outer wall of the branch pipe 2 can be increased, reducing the temperature difference between the inside and outside of the branch pipe 2, thereby reducing the probability of cracking or separation at this position due to excessive temperature difference and leakage.
[0018] Because of the presence of multiple branch pipes 2 in the superheater, by setting heat input pipe 6 and heat output pipe 7 respectively, it is possible to ensure that the heat source flows and is renewed in a timely manner in the flow cavity 4, and to connect multiple flow cavities 4 in the device in series, so as to facilitate the heating of the ends of multiple branch pipes 2.
[0019] The thermally conductive film 5 can be made of high-temperature resistant resin material, which facilitates heat transfer to the branch pipe 2, reduces heat loss during conduction, and makes it easier to fit tightly with the branch pipe 2. The thermal insulation shell 3 can be made of materials with good thermal insulation properties such as ceramics and stainless steel to prevent heat loss to the outside.
[0020] like Figure 2-3 As shown, the insulation shell 3 consists of two separate mounting half-shells 8; the flow cavities 4 inside the two mounting half-shells 8 are sealed by corresponding heat-conducting membranes 5; the two mounting half-shells 8 are closed and surround the outside of the branch pipe 2; the flow cavities 4 inside the two mounting half-shells 8 are connected by a flexible conduit 9. The structure of two mounting half-shells 8 facilitates the installation or replacement of this device, improving convenience. The flexible conduit 9 ensures that the heat source can be transferred within the two mounting half-shells 8.
[0021] like Figure 3 As shown, the outer wall of the mounting half-shell 8 is fixed with a hole seat 10; the corresponding hole seats 10 on the two mounting half-shells 8 are connected by a positioning pin 11; to ensure the accurate installation of the two mounting half-shells 8 when they are closed.
[0022] like Figure 2 As shown, the heat input pipe 6 and the heat output pipe 7 are connected to different mounting half shells 8 respectively, ensuring that the heat source is fully filled in different mounting half shells 8 and improving the uniformity of heating the outer wall of the branch pipe 2.
[0023] like Figure 1-2As shown, a buffer pad 12 is fixed to the upper end of the mounting half-shell 8 for contacting the outer wall of the outlet header body 1. The buffer pad 12 prevents direct contact between the outlet header body 1 and the mounting half-shell 8, avoiding the problem of abnormal noise. The buffer pad 12 is also made of high-temperature resistant rubber or silicone.
[0024] like Figure 3 As shown, the outer walls of the mounting half-shell 8 are all fitted with and fixed with a heat insulation layer 13. The heat insulation layer 13 can further isolate and reduce heat dissipation and loss.
[0025] like Figure 1-2 As shown, the fastener includes magnetic blocks 14 respectively fixed on the mounting half-shell 8; the magnetic blocks 14 are magnetically connected to the outer wall of the branch pipe 2. The connection between the magnetic blocks 14 and the outer wall of the branch pipe 2 improves the ease of installation and disassembly. It should be noted that by selecting magnetic blocks 14 with sufficient magnetic force, the firmness of the connection between them and the branch pipe 2 can be ensured.
[0026] It is understood that this utility model has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. Furthermore, under the teachings of this utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of this utility model.
Claims
1. A leakage-proof device for a boiler superheater outlet header, comprising an outlet header body (1) and a branch pipe (2) connected thereto, characterized in that: A heat insulation shell (3) is fitted onto the outer side of the end of the branch pipe (2); the heat insulation shell (3) is fixed to the branch pipe (2) by a fastener; a flow cavity (4) is opened inside the heat insulation shell (3); the flow cavity (4) is separated from the outer wall of the branch pipe (2) by a heat-conducting film (5) made of high-temperature resistant material; the heat-conducting film (5) is fixed to the heat insulation shell (3) and seals the flow cavity (4); the heat-conducting film (5) is in contact with the outer wall of the branch pipe (2); a heat input pipe (6) and a heat output pipe (7) are connected to the outer side of the heat insulation shell (3).
2. The anti-leakage device for the boiler superheater outlet header according to claim 1, characterized in that: The insulation shell (3) consists of two separate installation half shells (8); the flow cavities (4) inside the two installation half shells (8) are sealed by corresponding heat-conducting membranes (5); the two installation half shells (8) are closed and surround the outside of the branch pipe (2); the flow cavities (4) inside the two installation half shells (8) are connected by a flexible conduit (9).
3. A leak-proof device for a boiler superheater outlet header according to claim 2, characterized in that: The outer wall of the mounting half-shell (8) is fixed with a hole seat (10); the corresponding hole seats (10) on the two mounting half-shells (8) are connected by a positioning pin (11).
4. A leak-proof device for a boiler superheater outlet header according to claim 2, characterized in that: The heat input pipe (6) and the heat output pipe (7) are respectively connected to different mounting half shells (8).
5. A leak-proof device for a boiler superheater outlet header according to claim 2, characterized in that: The upper end of the mounting half-shell (8) is fixed with a buffer pad (12) for abutting against the outer wall of the export container body (1).
6. A leak-proof device for a boiler superheater outlet header according to claim 2, characterized in that: The outer walls of the installed half-shell (8) are all fitted with and fixed with heat insulation layers (13).
7. A leak-proof device for a boiler superheater outlet header according to claim 2, characterized in that: The fasteners include magnetic blocks (14) that are respectively fixed on the mounting half shell (8); the magnetic blocks (14) are magnetically connected to the outer wall of the branch pipe (2).