A three-layer type novel boiler sealing expansion device

Abstract

The utility model discloses a three -layer formula novel boiler sealing expansion device, including flue fender, pipeline and metal expansion joint, and the pipeline passes through the flue fender, the interlayer of flue fender is inlayed with inner bushing pipe, and the middle filling of inner bushing pipe is thermal insulation material layer, forms first layer sealing structure, and the both sides fixed connection of inner bushing pipe bottom location pipeline are respectively provided with brake pad, and the steel pipe is covered with brake pad, and the both ends of steel pipe are respectively welded brake pad and enclosure ring, and the middle filling of steel pipe is thermal insulation material layer, forms second layer sealing structure, and the bottom connection of enclosure ring metal expansion joint forms third layer sealing. The utility model provides a kind of simple structure sealing expansion device for the connection of flue fender and pipeline, can ensure sealing effect and good expansion adaptability;The device installation method is simple, is conducive to on -the -spot quick installation, reduces on -the -spot installation workload, saves installation cost.

Description

Technical Field

[0001] This utility model relates to the field of waste heat boiler equipment technology, and in particular to a novel three-layer boiler sealing expansion device. Background Technology

[0002] In the design of waste heat boilers, the boiler flue liner inevitably needs to have openings for the pipe locations. The connection device to the pipe must ensure its sealing while also dealing with issues such as the pipe expansion squeezing the liner. Inadequate sealing can lead to flue gas leakage or the expansion device failing to effectively adapt to thermal expansion and contraction, causing structural damage. The consequences not only include heat loss during boiler operation but also potential safety issues for the boiler during operation. Utility Model Content

[0003] To solve the above-mentioned technical problems, this utility model designs a new three-layer boiler sealing expansion device with good sealing performance and strong expansion adaptability. It has a simple structure, is easy to construct, and can achieve better sealing effect.

[0004] The present invention adopts the following technical solution: A novel three-layer boiler sealing expansion device includes a flue liner, a pipe, and a metal expansion joint. The pipe passes through the flue liner, and an inner lining sleeve is embedded in the interlayer of the flue liner. The middle of the inner lining sleeve is filled with a layer of insulation material to form a first sealing structure. Braking plates are fixedly connected to the bottom of the inner lining sleeve on both sides of the pipe. The braking plates are covered with steel pipes. Braking plates and protective rings are welded to the inside of both ends of the steel pipe. The middle of the steel pipe is filled with a layer of insulation material to form a second sealing structure. The bottom of the protective ring is connected to a metal expansion joint to form a third sealing layer.

[0005] Preferably, a steel plate is clamped to the outside of the pipe on the inner side of the flue liner, and the steel plate is fixedly connected to the flue liner by a pressure plate.

[0006] Preferably, a pressure sensor and a temperature sensor are installed within the insulation material layer to monitor pressure and temperature in real time.

[0007] Preferably, the brake plate is bolted to the flue liner, and the bolt holes are elongated oval holes. This makes it a small pressure relief device, allowing the pipeline to expand and contract freely when subjected to temperature changes, thus avoiding excessive stress.

[0008] Preferably, the steel plate is two steel plates cut into semicircles.

[0009] Preferably, the inner liner sleeve has a row of U-shaped grooves evenly arranged along its circumference.

[0010] Preferably, a brake plate is welded to the bottom of the inner liner sleeve.

[0011] The beneficial effects of this utility model are: this utility model provides a simple sealing expansion device for connecting flue liner plates and pipes, which can ensure sealing effect and good expansion adaptability; the device is easy to install, which is conducive to quick on-site installation, reduces on-site installation workload, and saves installation costs. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 yes Figure 1 A cross-sectional view along the AA direction; Figure 3 yes Figure 1 A cross-sectional view along the BB direction; Figure 4 This is a schematic diagram of one structure of the protective ring in this utility model; Figure 5 This is a schematic diagram of a brake plate structure in this utility model; Figure 6 This is a schematic diagram of a steel plate structure in this utility model; Figure 7 This is a schematic diagram of one structure of the inner lining sleeve in this utility model; Figure 8 This is an unfolded view of the inner lining sleeve in this utility model; In the diagram: 1. Steel pipe, 2. Enclosure ring, 3. Brake plate, 4. Steel plate, 5. Pressure plate, 6. Inner lining sleeve, 7. Flue liner, 8. Pipe, 9. Metal expansion joint. Detailed Implementation

[0013] The technical solution of this utility model will be further described in detail below through specific embodiments and with reference to the accompanying drawings: Example: Figures 1-8As shown, a novel three-layer boiler sealing and expansion device includes a steel pipe 1, a retaining ring 2, a brake plate 3, a steel plate 4, a pressure plate 5, an inner lining sleeve 6, a flue duct liner 7, a pipe 8, and a metal expansion joint 9. In this sealing and expansion device, the inner lining sleeve is first welded into the interlayer of the flue duct liner, with an insulation material layer filling the middle, forming the first sealing structure. A short steel pipe with a diameter larger than the pipe is used to enclose the pipe in the flue duct liner. Brake plates and retaining rings are welded to the inner ends of the steel pipe, with an insulation material layer filling the middle, forming the second sealing structure. The force and displacement generated by the pipe expansion are first transmitted to the brake plate. The brake plate and steel pipe effectively limit the thermal expansion displacement caused by the pipe, preventing deformation of the flue duct liner structure. Finally, a metal expansion joint is used on the outermost side to connect with the retaining ring, ultimately forming the third sealing and thermal expansion limiting structure, effectively solving the connection problem at the pipe penetration point of the flue duct liner. Finally, two semi-circular steel plates are inserted into the pipe inside the protective plate and fixed to the inner protective plate with a pressure plate, thus avoiding the corrosion and accumulation of high-temperature smoke and dust on the outer protective plate of the flue.

[0014] Pressure and temperature sensors are installed inside the insulation material layer to monitor pressure and temperature in real time.

[0015] The brake plate is connected to the flue liner by bolts, with oblong bolt holes. This makes it a small pressure relief device, allowing the pipeline to expand and contract freely when subjected to temperature changes, thus avoiding excessive stress.

[0016] A row of U-shaped grooves is evenly arranged along the circumference of the inner liner. A brake plate is welded to the bottom of the inner liner.

[0017] This utility model solves four key problems in the connection between flue liner and pipe: 1. Its sealing performance is ensured by a three-layer sealing structure (inner liner, sleeve, metal expansion joint); 2. Expansion force is preferentially transmitted to the brake plate to avoid damage to the flue liner structure; 3. It avoids the corrosion and accumulation of smoke and dust inside the flue liner; 4. Its structure is simple and easy to install and replace.

[0018] The embodiments described above are merely preferred solutions of this utility model and are not intended to limit this utility model in any way. Other variations and modifications are possible without departing from the technical solutions described in the claims.

Claims

1. A novel three-layer boiler sealing expansion device, comprising a flue liner, a pipe, and a metal expansion joint, wherein the pipe passes through the flue liner, characterized in that, The flue liner has an inner lining sleeve embedded in its interlayer. The inner lining sleeve is filled with a layer of insulation material to form the first sealing structure. Brake plates are fixedly connected to the bottom of the inner lining sleeve on both sides of the pipe. The brake plates are covered with steel pipes. Brake plates and protective rings are welded to the inside of both ends of the steel pipe. The middle of the steel pipe is filled with a layer of insulation material to form the second sealing structure. A metal expansion joint is connected to the bottom of the protective ring to form the third sealing layer.

2. The three-layer novel boiler sealing expansion device according to claim 1, characterized in that, A steel plate is clamped to the outside of the pipe on the inner side of the flue liner, and the steel plate is fixedly connected to the flue liner by a pressure plate.

3. The three-layer novel boiler sealing expansion device according to claim 1, characterized in that, Pressure sensors and temperature sensors are installed inside the insulation material layer.

4. The three-layer novel boiler sealing expansion device according to claim 1, characterized in that, The brake plate and the flue liner are connected by bolts, and the bolt holes are oblong holes.

5. A novel three-layer boiler sealing expansion device according to claim 2, characterized in that, The steel plate consists of two steel plates cut into semicircles.

6. A novel three-layer boiler sealing expansion device according to claim 1, characterized in that, The inner lining sleeve has a row of U-shaped grooves evenly arranged along its circumference.

7. A novel three-layer boiler sealing expansion device according to claim 1, characterized in that, A brake plate is welded to the bottom of the inner liner sleeve.

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