Water supply device in boiler barrel

Abstract

The utility model relates to the technical field of boiler barrels, in particular to an internal water supply device for a boiler barrel, which can eliminate internal water supply vortex of a pipe joint of a downcomer of the boiler barrel, reduce resistance of a water supply joint in the boiler and ensure stable operation of the boiler, and comprises the boiler barrel, and an upper water supply mother pipe and a lower water supply mother pipe are arranged in the boiler barrel. The upper water supply mother pipe and the lower water supply mother pipe are connected through an upper water supply communicating pipe and a lower water supply communicating pipe, a centralized descending pipe connector is arranged on the lower portion of the boiler barrel, and a water supply water injection pipe connected with the lower water supply mother pipe is arranged in the centralized descending pipe connector. Three-way reducing joints are arranged at the joint of the water supply lower portion mother pipe and the water supply and injection pipe and the joint of the water supply lower portion mother pipe and the water supply upper and lower communicating pipe, the inner diameter of the middle of each three-way reducing joint is larger than the inner diameter of the joint at the three ends, and a spiral blade is arranged at the bottom in the water supply and injection pipe.

Description

Technical Field

[0001] The utility model relates to the technical field of boiler drums, in particular to a water supply device inside a boiler drum. Background Art

[0002] The boiler drum is a cylindrical pressure vessel used for steam-water separation and steam purification in a water tube boiler, forming a water circulation loop and storing boiler water. The boiler drum is connected to the downcomer. In the existing structure, a water vortex will form inside the pipe joint, causing resistance to the water supply in the boiler and affecting the stable operation of the boiler. Summary of the invention

[0003] In order to solve the above technical problems, the utility model provides a boiler drum internal water supply device, which can eliminate the water supply vortex inside the boiler drum down pipe joint, reduce the resistance of the water supply connection in the boiler, and ensure the stable operation of the boiler.

[0004] The technical solution is as follows: a water supply device inside a boiler drum, comprising a boiler drum, wherein an upper water supply main pipe and a lower water supply main pipe are arranged inside the boiler drum, the upper water supply main pipe and the lower water supply main pipe are connected by upper and lower water supply connecting pipes, a centralized downcomer pipe joint is arranged at the lower part of the boiler drum, a water supply injection pipe connected to the lower water supply main pipe is arranged inside the centralized downcomer pipe joint, and it is characterized in that a three-way reducer is arranged at the connection between the lower water supply main pipe and the water supply injection pipe, and at the connection between the lower water supply main pipe and the upper and lower water supply connecting pipes, the inner diameter of the middle part of the three-way reducer is larger than the inner diameter of the joints at the three ends, and spiral blades are arranged at the bottom of the water supply injection pipe.

[0005] Its further feature is that the upper and lower water supply connecting pipes are bent finished seamless steel pipes.

[0006] After adopting the utility model, a three-way reducer is adopted, and the inner diameter in the middle is large, which can reduce the medium resistance when water enters, and the spiral blades in the water injection pipe can prevent vortexes from being generated when water is injected, which can fully separate steam and water and ensure the stable operation of the boiler. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 It is a schematic diagram of the structure of the utility model;

[0008] Figure 2 for Figure 1 Schematic diagram of the middle AA direction;

[0009] Figure 3 It is a schematic diagram of a three-way reducer;

[0010] Figure 4 It is the front view of the spiral blade;

[0011] Figure 5A top view of the spiral blade. DETAILED DESCRIPTION

[0012] See Figures 1 to 5 As shown, a water supply device inside a boiler drum comprises a boiler drum 1, wherein an upper water supply main pipe 2 and a lower water supply main pipe 3 are arranged in the boiler drum 1, and the upper water supply main pipe 2 and the lower water supply main pipe 3 are connected by upper and lower water supply connecting pipes 4. A centralized downcomer pipe joint 5 is arranged at the lower part of the boiler drum 1, and a water supply injection pipe 6 connected to the lower water supply main pipe 3 is arranged in the centralized downcomer pipe joint 5, and a three-way reducer 7 is arranged at the connection between the lower water supply main pipe 3 and the water supply injection pipe 6 and at the connection between the lower water supply main pipe 3 and the upper and lower water supply connecting pipes 4. The inner diameter of the middle part of the three-way reducer 7 is larger than the inner diameter of the joints at the three ends, that is, it becomes larger from the two ends to the middle, thereby reducing the medium resistance at the interface and ensuring the safety and sealing of the pipe. A spiral blade 8 is arranged at the bottom of the water supply injection pipe 6 to avoid the generation of vortexes during water injection and fully perform steam-water separation.

[0013] The upper and lower connecting pipes 4 for water supply are finished curved seamless steel pipes, which are no longer spliced ​​with steel plates, thus reducing multiple welds while ensuring sealing. In addition, the finished steel pipes can be bent by fixed molds, making manufacturing easy.

Claims

1. A water supply device inside a boiler drum, comprising a boiler drum, wherein an upper water supply main pipe and a lower water supply main pipe are arranged inside the boiler drum, wherein the upper water supply main pipe and the lower water supply main pipe are connected via upper and lower water supply connecting pipes, wherein a centralized downcomer pipe joint is arranged at the lower part of the boiler drum, wherein a water supply injection pipe connected to the lower water supply main pipe is arranged inside the centralized downcomer pipe joint, wherein: A three-way reducer is provided at the connection between the water supply lower main pipe and the water supply injection pipe, and at the connection between the water supply lower main pipe and the water supply upper and lower connecting pipes. The inner diameter of the middle part of the three-way reducer is larger than the inner diameter of the joints at the three ends. Spiral blades are provided at the bottom of the water supply injection pipe.

2. A boiler drum internal water supply device according to claim 1, characterized in that: The upper and lower water supply connecting pipes are bent finished seamless steel pipes.

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