Fan air heater of coal-fired boiler of thermal power plant

Abstract

The utility model discloses a fan air heater of a coal-fired boiler of a thermal power plant, and relates to the technical field of fan air heaters, the fan air heater comprises a mounting shell and a drain pipe, one side of the mounting shell is connected with an air inlet pipe in a penetrating manner, one end of the air inlet pipe is connected with a heat exchange pipe, and the drain pipe is connected to one side, far away from the air inlet pipe, of the heat exchange pipe; and a sealing ring is mounted on one side of the mounting shell through a groove. When the fan air heater of the coal-fired boiler of the thermal power plant is used, a heat preservation plate can be in butt joint with the side face of the mounting shell through a groove, meanwhile, a rotating block is rotated through a rotating shaft, the rotating block is rotationally connected to the outer side of a protruding block in a sleeving mode, then a telescopic block is loosened, and under the reset effect of a telescopic spring, heat preservation is achieved. According to the heat preservation device, the protruding block can be clamped in the groove of the rotating block through the telescopic block, the heat preservation plate can be quickly connected to the outer side of the mounting shell in a butt joint mode under the cooperation of the rotating block and the protruding block, heat loss from the side face of the mounting shell can be reduced through the heat preservation plate, and therefore the heat preservation effect is better.

Description

Technical Field

[0001] The utility model relates to the technical field of fan heaters, in particular to a fan heater for a coal-fired boiler in a thermal power plant. Background Art

[0002] The fan heater of the coal-fired boiler in a thermal power plant is one of the boiler auxiliary equipment, mainly used to improve the boiler combustion efficiency and reduce energy consumption. It heats the air through the heating element and sends it into the boiler combustion chamber to improve the combustion efficiency.

[0003] When the existing fan heater is in use, in order to facilitate the subsequent replacement and maintenance of the heat exchange tube inside the fan heater, an opening is opened on the side of the mounting shell. However, in order to prevent heat from being lost from the opening of the mounting shell, it is usually necessary to fix the insulation board at the opening of the mounting shell with bolts, which makes it very cumbersome to install and remove the insulation board each time, and tools need to be constantly used to remove and install the insulation board, which is inconvenient for users to operate. Utility Model Content

[0004] The purpose of the utility model is to provide a fan heater for a coal-fired boiler in a thermal power plant, so as to solve the problem in the above background art that the insulation board of the currently used fan heater is not convenient to be quickly installed on the side of the installation shell.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: a fan heater for a coal-fired boiler in a thermal power plant, comprising: a mounting shell and a drain pipe, wherein an air inlet pipe is connected through one side of the mounting shell, a heat exchange pipe is connected to one end of the air inlet pipe, and the drain pipe is connected to the side of the heat exchange pipe away from the air inlet pipe;

[0006] A sealing ring is installed on one side of the installation shell through a groove, and a heat preservation plate is provided on one side of the sealing ring.

[0007] Preferably, one side of the mounting shell is connected to a rotating block via a rotating shaft, and one side of the insulation board is installed with a protrusion.

[0008] Preferably, a telescopic spring is installed inside the rotating block through a groove, and one side of the telescopic spring is connected to a telescopic block that passes through the rotating block.

[0009] Preferably, one end of the air inlet pipe and the drain pipe is equipped with an insert block, one side of the insert block is connected with a push rod, the top of the push rod is connected with a clamping rod, the outer side of the clamping rod is sleeved with a fixed block, and a movable spring is connected between the clamping rod and the fixed block.

[0010] Preferably, movable blocks are provided on both sides of the push rod through inclined surfaces, and a first wedge block is installed at one end of the movable block.

[0011] Preferably, a pipe is sleeved on the outer side of the insert block, and a second wedge-shaped block is installed on the outer side of the pipe.

[0012] Preferably, a slider is connected between one side of the movable block and the groove of the inserting block, and a return spring is connected between the slider and the groove of the inserting block.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: when the fan heater of the coal-fired boiler of the thermal power plant is in use, the insulation plate can be connected to the side of the mounting shell through the groove, and the rotating block can be rotated by the rotating shaft to rotate the rotating block to the outside of the protrusion, and then the telescopic block can be loosened. Under the reset action of the telescopic spring, the telescopic block can clamp the protrusion in the groove of the rotating block. With the cooperation of the rotating block and the protrusion, the insulation plate can be quickly connected to the outside of the mounting shell. The insulation plate can reduce the heat loss from the side of the mounting shell, thereby achieving better insulation effect. This is the usage feature of the fan heater of the coal-fired boiler of the thermal power plant.

[0014] 1. When using the fan heater of the coal-fired boiler of the thermal power plant, the insulation board can be quickly connected to the side of the mounting shell according to the use requirements, and the insulation board can be fixed to the side of the mounting shell with the cooperation of the rotating block and the protrusion. The insulation board can prevent heat from being lost from the side of the mounting shell, thereby reducing heat loss.

[0015] 2. When the fan heater of the coal-fired boiler of the thermal power plant is in use, the corresponding pipes can be connected to the air inlet pipe and the drain pipe respectively according to the use requirements, and the push rod can be pushed into the interior of the plug block so that the push rod can squeeze the movable block and the first wedge block out of the groove of the plug block through the inclined surface. With the cooperation of the first wedge block, the pipes can be docked and fixed to the air inlet pipe and the drain pipe respectively, thereby facilitating and quickly connecting and fixing the pipes. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the main cutaway structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the left side cross-section structure of the rotating block of the present invention;

[0018] Figure 3 This is a schematic diagram of the left side structure of the installation shell of the utility model;

[0019] Figure 4 This is a schematic diagram of the main cutaway structure of the plug-in block of the utility model;

[0020] Figure 5 This is a schematic diagram of the top-down cross-sectional structure of the rotating block of the present invention.

[0021] In the figure: 1. Mounting shell; 2. Air inlet pipe; 3. Heat exchange pipe; 4. Drain pipe; 5. Sealing ring; 6. Insulation plate; 7. Rotating block; 8. Bump; 9. Telescopic spring; 10. Telescopic block; 11. Insert block; 12. Push rod; 13. Clamping rod; 14. Fixed block; 15. Movable spring; 16. Movable block; 17. First wedge block; 18. Pipeline; 19. Second wedge block; 20. Slider; 21. Return spring. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] See also Figure 1 The utility model provides a technical solution: a fan heater for a coal-fired boiler in a thermal power plant, comprising: a mounting shell 1 and a drain pipe 4, an air inlet pipe 2 being connected through one side of the mounting shell 1, a heat exchange pipe 3 being connected at one end of the air inlet pipe 2, and the drain pipe 4 being connected to the side of the heat exchange pipe 3 away from the air inlet pipe 2;

[0024] A sealing ring 5 is installed on one side of the mounting shell 1 through a groove, and an insulation plate 6 is provided on one side of the sealing ring 5. A rotating block 7 is connected to one side of the mounting shell 1 through a rotating shaft, and a convex block 8 is installed on one side of the insulation plate 6. A telescopic spring 9 is installed inside the rotating block 7 through a groove, and a telescopic block 10 that passes through the rotating block 7 is connected to one side of the telescopic spring 9. The telescopic block 10 forms a telescopic structure between the telescopic spring 9 and the groove of the rotating block 7.

[0025] During specific implementation, the fan heater of the coal-fired boiler in the thermal power plant can dock the insulation board 6 into the groove on one side of the mounting shell 1, and make the insulation board 6 squeeze the sealing ring 5 in the groove of the mounting shell 1. The sealing ring 5 will be deformed by the squeezing. At this time, the sealing effect between the insulation board 6 and the mounting shell 1 can be increased by the sealing ring 5. Then, the rotating block 7 is rotated toward the convex block 8 on one side of the insulation board 6 through the rotating shaft, and the telescopic block 10 is pulled toward the inside of the rotating block 7, so that the telescopic block 10 is retracted into the groove of the rotating block 7 and squeezes the telescopic spring 9 in the groove of the rotating block 7. At this time, the rotating block 7 can be rotatably sleeved to the outside of the convex block 8, and then the telescopic block 10 can be loosened. The telescopic block 10 will be reset from the rotating block 7 by the telescopic spring 9. The cam 8 is then moved out of the groove of the rotating block 7, and the cam 8 is limited in the groove of the rotating block 7 by the obstruction of the telescopic block 10. The cam 8 is installed on one side of the thermal insulation board 6. Through the cooperation of the cam 8 and the rotating block 7, the thermal insulation board 6 can be installed on one side of the mounting frame, and the sealing ring 5 can be squeezed by the thermal insulation board 6 to increase the sealing effect inside the mounting shell 1. At the same time, the thermal insulation board 6 is made of polystyrene, which has a good thermal insulation effect, thereby reducing heat loss. Conversely, the telescopic block 10 can be pushed toward the inside of the rotating block 7 again. Without the obstruction of the telescopic block 10, the rotating block 7 can be rotated in the opposite direction so that the rotating block 7 is rotated out from the outside of the cam 8. Then the thermal insulation board 6 can be removed, so that the internal heat exchange tube 3 can be taken out for replacement.

[0026] See Figure 2 、 Figure 3 and Figure 5 It can be seen that when in use, the insulation board 6 can be quickly fixed to one side of the mounting shell 1 according to the use requirements, and the insulation board 6 can be connected and fixed by the rotating block 7 and the protrusion 8, so as to reduce the heat loss inside the mounting shell 1.

[0027] One end of the air intake pipe 2 and the drain pipe 4 are both installed with an insert block 11, one side of the insert block 11 is connected with a push rod 12, the top of the push rod 12 is inserted with a clamping rod 13, the outer side of the clamping rod 13 is sleeved with a fixed block 14, and a movable spring 15 is connected between the clamping rod 13 and the fixed block 14. Movable blocks 16 are provided on both sides of the push rod 12 through inclined surfaces, one end of the movable block 16 is installed with a first wedge block 17, the outer side of the insert block 11 is sleeved with a pipe 18, and the outer side of the pipe 18 is installed with a second wedge block 19, a slider 20 is connected between one side of the movable block 16 and the groove of the insert block 11, a return spring 21 is connected between the slider 20 and the groove of the insert block 11, and the movable block 16 forms a telescopic structure through the slider 20 and the groove of the insert block 11.

[0028] In a specific implementation, the fan heater of the coal-fired boiler of the thermal power plant can be used to connect the pipe 18 with the air intake pipe 2, and at the same time, the plug 11 at one end of the air intake pipe 2 is plugged into the outside of the pipe 18, and then the push rod 12 is pushed toward the inside of the plug 11, so that the push rod 12 squeezes the movable blocks 16 on both sides through the inclined surface. The movable blocks 16 on both sides are squeezed by the push rod 12, and will slide out to the outside of the plug 11 through the slider 20, while making the return spring 21 in a stretched state, and squeezing the second wedge block 19 through the first wedge block 17 on one side of the movable block 16. Since the ends of the first wedge block 17 and the second wedge block 19 that are close to each other are both inclined surfaces, The structure is such that the second wedge block 19 is installed on the outside of the pipe 18, so the first wedge block 17 will push the pipe 18 toward the intake pipe 2 through the second wedge block 19. The movement of the pipe 18 toward the intake pipe 2 will squeeze the sealing block on the end face of the intake pipe 2, thereby increasing the sealing effect between the pipe 18 and the intake pipe 2. At the same time, the groove at one end of the push rod 12 will be aligned with the clamping rod 13, and then the movable spring 15 will reset the clamping rod 13, which will be inserted into the groove of the push rod 12, thereby fixing the position of the clamping rod 13. The push rod 12 can prevent the movable block 16 and the first wedge block 17 from shrinking into the inserting block 11.

[0029] On the contrary, the card rod 13 can be pulled upward so that the card rod 13 does not limit the push rod 12, and then the return spring 21 will drive the slider 20 and the movable block 16 to reset, and the first wedge block 17 will shrink into the groove of the insert block 11. Without the obstruction of the first wedge block 17, the pipe 18 can be removed from one side of the intake pipe 2, so that the pipe 18 can be quickly separated from the intake pipe 2. Similarly, the above steps can be repeated to connect one end of the drain pipe 4 to the pipe 18, and one end of the intake pipe 2 is connected to the steam pipe 18, and one end of the drain pipe 4 is connected to the drain connecting pipe, so that the user can quickly connect and fix the pipe 18.

[0030] See Figure 1 and Figure 4 It can be seen that when in use, the corresponding pipes 18 can be quickly connected to one side of the air inlet pipe 2 and the drain pipe 4 according to the use requirements, so that the user can quickly connect and fix the pipes 18.

[0031] To sum up: when the fan heater of the coal-fired boiler of the thermal power plant is in use, the mounting shell 1 can be installed between the blower outlet and the air preheater inlet, and then the steam pipe 18 can be connected to the air inlet pipe 2, and the drain pipe can be connected to the drain pipe 4. Then the steam will be transported to the inside of the heat exchange tube 3 through the air inlet pipe 2 and flow inside the mounting shell 1 through the heat exchange tube 3. At this time, the heat can be input into the power plant boiler in conjunction with the blower and the air preheater. This is the existing technology and will not be elaborated on here. This is the usage feature of the fan heater of the coal-fired boiler of the thermal power plant. The content not described in detail in this description belongs to the existing technology known to professional and technical personnel in this field.

[0032] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A fan heater for a coal-fired boiler in a thermal power plant, comprising: The mounting shell (1) and the drain pipe (4) are characterized in that: an air inlet pipe (2) is connected through one side of the mounting shell (1), one end of the air inlet pipe (2) is connected to a heat exchange pipe (3), and the drain pipe (4) is connected to a side of the heat exchange pipe (3) away from the air inlet pipe (2); A sealing ring (5) is installed on one side of the installation shell (1) through a groove, and a heat preservation plate (6) is provided on one side of the sealing ring (5).

2. The fan heater for a coal-fired boiler in a thermal power plant according to claim 1, characterized in that: One side of the mounting shell (1) is connected to a rotating block (7) via a rotating shaft, and one side of the heat-insulating plate (6) is installed with a protrusion (8).

3. The fan heater for a coal-fired boiler in a thermal power plant according to claim 2, characterized in that: A telescopic spring (9) is installed inside the rotating block (7) through a groove, and one side of the telescopic spring (9) is connected to a telescopic block (10) that passes through the rotating block (7).

4. The fan heater for a coal-fired boiler in a thermal power plant according to claim 1, characterized in that: An insert block (11) is installed at one end of the air inlet pipe (2) and the drain pipe (4), a push rod (12) is connected through one side of the insert block (11), a clamping rod (13) is inserted at the top of the push rod (12), a fixed block (14) is sleeved on the outer side of the clamping rod (13), and a movable spring (15) is connected between the clamping rod (13) and the fixed block (14).

5. The fan heater for a coal-fired boiler in a thermal power plant according to claim 4, characterized in that: Both sides of the push rod (12) are provided with movable blocks (16) through inclined surfaces, and one end of the movable block (16) is installed with a first wedge block (17).

6. The fan heater for a coal-fired boiler in a thermal power plant according to claim 4, characterized in that: The outer side of the insert block (11) is sleeved with a pipe (18), and the outer side of the pipe (18) is installed with a second wedge block (19).

7. The fan heater for a coal-fired boiler in a thermal power plant according to claim 5, characterized in that: A slider (20) is connected between one side of the movable block (16) and the groove of the insert block (11), and a return spring (21) is connected between the slider (20) and the groove of the insert block (11).

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