Supercritical super heater

Abstract

The utility model belongs to the technical field of heaters, and particularly relates to a supercritical super heater which comprises a tank body, a tube plate is connected inside the tank body in a sliding mode, a U-shaped tube assembly body is installed on the tube plate, two supporting seats are fixed to the top of the tank body, and a roller body is connected between the inner walls of the two sides of each supporting seat in a rotating mode through a bearing. By arranging the tank body, the tube plate, the supporting seat, the roller body, the fixed pulley, the annular plate, the overhaul channel, the blocking cover and the buffer assembly, in the process of using the supercritical heater, workers can enter the tank body by utilizing the arranged overhaul channel, and the workers can conveniently enter the tank body by utilizing the annular plate capable of ascending and descending. By means of the arrangement of the water inlet and the water outlet, a worker entering the tank body can conveniently move up and down to overhaul parts in the tank body, meanwhile, by means of the arranged buffer assembly, the tube plate can be protected, impact on the tube plate when the water supply pressure is too large is avoided, and therefore the service life of the tube plate is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of heaters, in particular to a supercritical super heater. Background Art

[0002] The supercritical high-pressure heater is one of the key equipment used to increase the boiler feed water temperature in modern large-scale thermal power plants. It plays a vital role in the thermal cycle process. A supercritical unit refers to a steam turbine generator unit whose steam parameters exceed the critical point of water. In a supercritical power plant, the high-pressure heater is usually a group of heat exchangers arranged in series. They use steam extraction from the steam turbine to heat the boiler feed water coming out of the deaerator step by step, so that the feed water reaches a higher temperature before entering the boiler evaporator, thereby effectively improving the thermal efficiency of the system, reducing cold source losses and saving fuel consumption. However, during the use of the current supercritical heater, the space between the internal tube bundle arrangement and the container shell is limited, which makes it difficult for personnel to enter the pressure shell for inspection and maintenance, which is inconvenient to use. Therefore, we propose a supercritical super heater to solve the above problems. Utility Model Content

[0003] 1. Technical issues to be resolved

[0004] In view of the deficiencies of the prior art, the utility model provides a supercritical super heater, which solves the problems raised in the above background technology.

[0005] (II) Technical solution

[0006] In order to achieve the above-mentioned purpose, the utility model specifically adopts the following technical solutions:

[0007] A supercritical superheater comprises a tank body, wherein a tube sheet is slidably connected inside the tank body, a U-shaped tube assembly body is mounted on the tube sheet, two support seats are fixed on the top of the tank body, a roller body is rotatably connected between the inner walls on both sides of the support seats via bearings, a fixed pulley fixed to the top of the tank body is arranged on one side of the roller body, one end of a steel wire rope on the roller body passes around the corresponding fixed pulley, an annular plate is arranged inside the tank body, one end of the steel wire rope on the roller body slides through the tank body to extend into the interior thereof and is fixedly connected to the top of the annular plate, an inspection channel is connected and fixed to the outer wall of the tank body, a baffle cover is mounted on one end of the inspection channel, and three groups of buffer assemblies for protecting the tube sheet are arranged inside the tank body.

[0008] Furthermore, the buffer assembly includes a support block fixed to the inner wall of the tank body, a box body is fixed to one side wall of the support block, two damping buffers are fixed inside the box body, buffer blocks are fixed to the bottom ends of the damping buffers, trapezoidal blocks adapted to the buffer blocks are fixed to the top of the tube plate, and the bottom ends of the buffer blocks slide through the box body to extend to the bottom thereof and fit with the top of the trapezoidal blocks.

[0009] Furthermore, sealing rings are fixed inside the two clearance openings opened at the bottom of the box body, and the buffer blocks slide inside the corresponding sealing rings respectively.

[0010] Furthermore, the inner wall of the tank body is provided with four slide grooves in a circular array, and the outer wall of the tube sheet is fixed with sliding blocks adapted to the slide grooves in a circular array.

[0011] Furthermore, a protective cover is installed on the top of the tank body.

[0012] (III) Beneficial effects

[0013] Compared with the prior art, the utility model provides a supercritical super heater, which has the following beneficial effects:

[0014] The utility model, by arranging a tank body, a tube sheet, a support seat, a roller body, a fixed pulley, an annular plate, an inspection channel, a baffle cover and a buffer component, during the use of the supercritical heater, the arranged inspection channel is utilized to allow workers to enter the interior of the tank body, and the liftable annular plate is utilized to facilitate the workers who enter the tank body to move up and down to inspect the internal components thereof, and at the same time, the arranged buffer component can protect the tube sheet, avoiding the impact on the tube sheet caused by excessive water supply pressure, thereby extending the service life of the tube sheet. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 This is a cross-sectional view of the overall structure of the utility model;

[0017] Figure 3 This is a schematic diagram of the tube plate structure of the utility model.

[0018] In the figure: 1. tank body; 2. tube sheet; 3. U-tube assembly body; 4. support seat; 5. roller body; 6. fixed pulley; 7. annular plate; 8. maintenance channel; 9. cover; 10. buffer assembly; 1001. support block; 1002. box body; 1003. damping buffer; 1004. buffer block; 1005. trapezoidal block; 11. sealing ring; 12. slide groove; 13. slider; 14. protective cover. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] Example

[0021] like Figure 1 , Figure 2 and Figure 3 As shown, a supercritical superheater proposed in an embodiment of the utility model includes a tank body 1, a protective cover 14 is installed on the top of the tank body 1, which can protect the components on the top of the tank body 1 so as to prolong its service life, a tube sheet 2 is slidably connected inside the tank body 1, a U-shaped tube assembly body 3 is installed on the tube sheet 2, two support seats 4 are fixed on the top of the tank body 1, a roller body 5 is rotatably connected between the inner walls on both sides of the support seat 4 through a bearing, a fixed pulley 6 fixed to the top of the tank body 1 is arranged on one side of the roller body 5, one end of the steel wire rope on the roller body 5 is passed around the corresponding fixed pulley 6, an annular plate 7 is arranged inside the tank body 1, one end of the steel wire rope on the roller body 5 slides through the tank body 1 to extend into the interior thereof and is fixedly connected to the top of the annular plate 7, the tank body 1 An inspection channel 8 is fixedly connected to the outer wall of the tank 1, and a baffle 9 is installed at one end of the inspection channel 8. Three groups of buffer components 10 for protecting the tube sheet 2 are arranged inside the tank body 1. During the use of this supercritical superheater, during the water supply process through the water inlet pipe on the left side of the tank body 1, the provided buffer component 10 can protect the tube sheet 2. Later, when the staff needs to enter the interior of the tank body 1 for inspection, two motors with different directions are started to drive the roller body 5 to rotate respectively. After the roller body 5 rotates, it will drive the steel wire rope on its surface to stretch. At this time, the annular plate 7 will move down to a suitable height for the inspection channel 8, and the baffle 9 will be opened. At this time, the staff can enter the interior of the tank body 1 through the inspection channel 8 to inspect its internal components.

[0022] like Figure 2 and Figure 3As shown, in some embodiments, the buffer assembly 10 includes a support block 1001 fixed to the inner wall of the tank body 1, a box body 1002 is fixed to one side wall of the support block 1001, two damping buffers 1003 are fixed inside the box body 1002, and the bottom ends of the damping buffers 1003 are fixed with buffer blocks 1004, and the two yielding openings opened at the bottom of the box body 1002 are fixed with sealing rings 11 inside, and the buffer blocks 1004 slide inside the corresponding sealing rings 11 respectively, which can play a role in sealing and protecting the damping buffers 1003 inside the box body 1002, and the top of the tube sheet 2 is fixed with The trapezoidal block 1005 matched with the buffer block 1004, the bottom end of the buffer block 1004 slides through the box body 1002 to extend below it and fits with the top of the trapezoidal block 1005. When in use, when the water enters the interior of the tank body 1 and impacts the tube sheet 2, the tube sheet 2 will move up a certain distance at this time. When the tube sheet 2 moves up, it will drive the trapezoidal block 1005 to move up. At this time, the trapezoidal block 1005 will squeeze the two buffer blocks 1004. When the buffer block 1004 is squeezed, the damping buffer 1003 can buffer the force it receives, thereby achieving the role of buffering protection for the tube sheet 2.

[0023] like Figure 3 As shown, in some embodiments, the inner wall of the tank body 1 is provided with four slide grooves 12 in a circular array, and the outer wall of the tube sheet 2 is fixed with sliders 13 adapted to the slide grooves 12 in a circular array, which can support the tube sheet 2 and make it more stable during the buffer sliding process.

[0024] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A supercritical superheater, comprising a tank (1), characterized in that: The inside of the tank body (1) is slidably connected to a tube sheet (2), and a U-shaped tube assembly body (3) is installed on the tube sheet (2). Two support seats (4) are fixed on the top of the tank body (1). A roller body (5) is rotatably connected between the inner walls of the two sides of the support seat (4) through bearings. One side of the roller body (5) is provided with a fixed pulley (6) fixed to the top of the tank body (1). One end of the steel wire rope on the roller body (5) passes around the corresponding fixed pulley (6). An annular plate (7) is provided inside the tank body (1). One end of the steel wire rope on the roller body (5) slides through the tank body (1) and extends to the inside and is fixedly connected to the top of the annular plate (7). An inspection channel (8) is connected and fixed to the outer wall of the tank body (1). A baffle (9) is installed at one end of the inspection channel (8). Three groups of buffer components (10) for protecting the tube sheet (2) are provided inside the tank body (1).

2. A supercritical superheater according to claim 1, characterized in that: The buffer assembly (10) comprises a support block (1001) fixed to the inner wall of the tank body (1), a box body (1002) being fixed to one side wall of the support block (1001), two damping buffers (1003) being fixed inside the box body (1002), a buffer block (1004) being fixed to the bottom end of each damping buffer (1003), a trapezoidal block (1005) matching the buffer block (1004) being fixed to the top of the tube sheet (2), and the bottom end of each buffer block (1004) slidingly passes through the box body (1002) to extend below it and fits with the top of the trapezoidal block (1005).

3. A supercritical superheater according to claim 2, characterized in that: Sealing rings (11) are fixed inside the two clearance openings opened at the bottom of the box body (1002), and the buffer blocks (1004) slide inside the corresponding sealing rings (11) respectively.

4. A supercritical superheater according to claim 1, characterized in that: The inner wall of the tank body (1) is provided with four slide grooves (12) in a circular array, and the outer wall of the tube sheet (2) is fixed with sliding blocks (13) adapted to the slide grooves (12) in a circular array.

5. The supercritical superheater according to claim 1, characterized in that: A protective cover (14) is installed on the top of the tank body (1).

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