Energy-saving hood suitable for power plant boiler

Abstract

The utility model relates to the technical field of boiler air caps, in particular to an energy-saving air cap suitable for a power plant boiler, which comprises an air cap main body, a plurality of air vents are arranged on the outer wall of the air cap main body, and the plurality of air vents are arranged along the circumferential direction of the outer wall of the air cap main body at equal angles. A plurality of vertical grooves are formed in the inner wall of the hood body and communicate with a plurality of ventilation openings correspondingly, and a circular plate is installed between the inner walls of the ventilation openings in a sliding mode; the circular plate and the plugging strip are mounted through the cooperation of the ventilation opening and the vertical groove, so that the relative size of the cross section of the ventilation opening can be controlled within a certain range in a manner of integrally moving the circular plate and the plugging strip up and down, and the air distribution performance of the air cap main body is further controlled; and the device can conduct air distribution adjustment in the boiler within a certain range in the mode of lifting adjustment of the circular plate and the blocking strip, the process of overall replacement of the air cap body is omitted, and the practicability of the device is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of boiler hoods, in particular to an energy-saving hood suitable for boilers in power plants. Background Art

[0002] The hood of a power plant boiler is a key component of a circulating fluidized bed boiler. As the air distribution device of the boiler, it plays a key role in the safe and economical operation of the boiler. The hood of a power plant boiler is generally made of wear-resistant, heat-resistant and corrosion-resistant alloy materials to ensure that it can operate stably for a long time in a high temperature, high pressure and high corrosion environment. Its working principle is to guide and disperse the air through the hood so that the air can evenly enter the furnace and fully mix with the fuel, thereby promoting the combustion and heat transfer of the fuel and improving the thermal efficiency and economy of the boiler.

[0003] In the current prior art, the air holes on the boiler hood are fixed, which fixes the relative cross-section of the exhaust column. The air holes on the hood can affect the economic efficiency of air distribution in the boiler to a certain extent, so that when the air distribution in the boiler needs to be adjusted, it can only be done by replacing the hood as a whole.

[0004] Therefore, in view of the above problems, an energy-saving hood suitable for a boiler in a power plant is proposed. Utility Model Content

[0005] In order to make up for the shortcomings of the prior art and solve the problem that the air holes on the boiler hood are fixed, which makes the relative cross-section of the exhaust column fixed, and the air holes on the hood can affect the economy of air distribution in the boiler to a certain extent, and thus when the air distribution in the boiler needs to be adjusted, it can only be done by replacing the hood as a whole, an energy-saving hood suitable for power plant boilers is proposed.

[0006] The technical solution adopted by the utility model to solve its technical problems is: the energy-saving hood suitable for a boiler in a power plant described in the utility model comprises a hood body, the outer wall of the hood body is provided with a plurality of ventilation holes, the plurality of ventilation holes are provided at equally divided angles along the circumferential direction of the outer wall of the hood body, the inner wall of the hood body is provided with a plurality of vertical grooves, the plurality of vertical grooves are respectively connected with the plurality of ventilation holes, a circular plate is slidably installed between the inner walls of the ventilation holes, a sealing strip is fixedly connected to one side of the circular plate, the sealing strip is slidably installed between the inner walls of the vertical grooves, a first circular plate is fixedly connected to the other side of the circular plate, and the side wall of the first circular plate is fitted to the outer wall of the hood body.

[0007] Preferably, a through circular hole is opened at the center of the top of the hood body, and a screw rod is slidably installed between the inner walls of the through circular hole. The convex strip on the outer wall of the screw rod and the strip groove on the inner wall of the through circular hole are engaged with each other. One end of the screw rod extends to the interior of the hood body, and one end of the screw rod is fixedly connected to a centralizing circular plate, and the side wall of the centralizing circular plate is fixedly connected to a plurality of arc-shaped connecting rods, and the plurality of arc-shaped connecting rods are respectively fixedly connected to the side walls of a plurality of sealing strips.

[0008] Preferably, a first strip-shaped limiting ring is fixedly connected to the outer wall of the hood body near the top edge, and a first lifting ring is fixedly connected to the top center of the hood body.

[0009] Preferably, an adjusting sleeve is installed on the external thread of the screw rod, a second lifting ring is fixedly connected below the adjusting sleeve, and the second lifting ring is engaged with the first lifting ring.

[0010] Preferably, a spring is installed between the second lifting ring and the first lifting ring, annular bearings are fixedly connected to both ends of the spring, and the two annular bearings are respectively fitted with the first lifting ring and the second lifting ring.

[0011] Preferably, a second strip-shaped limiting ring is fixedly connected to the bottom of the second lifting ring, and the second strip-shaped limiting ring can be engaged with the first strip-shaped limiting ring.

[0012] Preferably, the other end of the screw rod is fixedly connected to a second circular plate.

[0013] Beneficial effects of the utility model:

[0014] In the utility model, the circular plate and the sealing strip are installed by cooperating with the vent and the vertical groove, so that the relative size of the vent cross section can be controlled within a certain range by moving the circular plate and the sealing strip up and down as a whole, thereby controlling the air distribution performance of the hood body, so that the device can adjust the air distribution in the boiler within a certain range by raising and lowering the circular plate and the sealing strip, omitting the process of replacing the hood body as a whole, thereby increasing the practicality of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional diagram of the utility model;

[0016] Figure 2 It is a perspective view of the side section of the main body of the stroke cap of the utility model;

[0017] Figure 3 This utility model Figure 2 The enlarged schematic diagram of part A in the middle;

[0018] Figure 4 It is a three-dimensional diagram of the linkage between the screw rod and the blocking strip in the utility model;

[0019] Figure 5 It is a three-dimensional diagram of a partial cross-section of the adjustment sleeve in the utility model;

[0020] Legend:

[0021] 1. Hood body; 11. Ventilation port; 12. Vertical slot; 2. Circular plate; 21. Sealing strip; 22. First circular plate; 13. Through-hole; 3. Screw rod; 31. Central circular plate; 32. Arc connecting rod; 14. First strip limiting ring; 15. First lifting ring; 4. Adjusting sleeve; 41. Second lifting ring; 5. Spring; 51. Annular bearing; 42. Second strip limiting ring; 33. Second circular plate. DETAILED DESCRIPTION

[0022] 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 of 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.

[0023] See also Figure 1 - Figure 5 The utility model provides an energy-saving hood suitable for a boiler in a power plant, comprising a hood body 1, a plurality of vents 11 are provided on the outer wall of the hood body 1, the plurality of vents 11 are provided along the circumferential direction of the outer wall of the hood body 1 at equally divided angles, a plurality of vertical grooves 12 are provided on the inner wall of the hood body 1, the plurality of vertical grooves 12 are respectively connected with the plurality of vents 11, a circular plate 2 is slidably installed between the inner walls of the vents 11, a sealing strip 21 is fixedly connected to one side of the circular plate 2, the sealing strip 21 is slidably installed between the inner walls of the vertical grooves 12, a first circular plate 22 is fixedly connected to the other side of the circular plate 2, and the side wall of the first circular plate 22 is fitted to the outer wall of the hood body 1;

[0024] When working, the vent 11 serves as a wind distribution hole for the hood body 1 to the boiler, and the size of its relative cross section can be adjusted by the relative position of the circular plate 2 and the blocking strip 21 in the vent 11 and the vertical slot 12, wherein the mutual sliding of the first circular plate 22 and the outer wall of the hood body 1 can increase the installation stability of the hood body 1 to the circular plate 2 and the blocking strip 21;

[0025] like Figure 2 , Figure 3 and Figure 4As shown, a through circular hole 13 is opened at the center of the top of the hood body 1, and a screw rod 3 is slidably installed between the inner walls of the through circular hole 13, and the convex strips on the outer wall of the screw rod 3 are engaged with the strip grooves on the inner wall of the through circular hole 13. One end of the screw rod 3 extends to the inside of the hood body 1, and one end of the screw rod 3 is fixedly connected to a centralizing circular plate 31, and a plurality of arc-shaped connecting rods 32 are fixedly connected to the side walls of the centralizing circular plate 31, and the plurality of arc-shaped connecting rods 32 are respectively fixedly connected to the side walls of the plurality of blocking strips 21;

[0026] When working, the screw rod 3 is linked with the plurality of blocking strips 21 through the cooperation of the central circular plate 31 and the arc-shaped connecting rod 32, so that the lifting and lowering of the circular plate 2 and the blocking strips 21 can be controlled by adjusting the lifting and lowering of the screw rod 3;

[0027] like Figure 3 As shown, a first strip-shaped limiting ring 14 is fixedly connected to the outer wall of the hood body 1 near the top edge, and a first hanging ring 15 is fixedly connected to the top center of the hood body 1;

[0028] When working, the first strip-shaped limiting ring 14 and the first lifting ring 15 are fixed on the hood body 1 to cooperate with the screw rod 3 to adjust the lifting;

[0029] like Figure 1 , Figure 3 and Figure 5 As shown, an adjusting sleeve 4 is installed on the external thread of the screw rod 3 , a second lifting ring 41 is fixedly connected below the adjusting sleeve 4 , and the second lifting ring 41 is engaged with the first lifting ring 15 .

[0030] During operation, the adjusting sleeve 4 is engaged with the first lifting ring 15 through the second lifting ring 41, and after penetrating the convex strips on the side wall of the circular hole 13 and the strip grooves on the outer wall of the screw rod 3, the screw rod 3 and the circular plate 2 can be lifted and lowered as a whole by rotating the second lifting ring 41;

[0031] like Figure 3 and Figure 5 As shown, a spring 5 is installed between the second lifting ring 41 and the first lifting ring 15, and annular bearings 51 are fixedly connected at both ends of the spring 5. The two annular bearings 51 are respectively fitted with the first lifting ring 15 and the second lifting ring 41, and a second strip limiting ring 42 is fixedly connected to the bottom of the second lifting ring 41, and the second strip limiting ring 42 can be engaged with the first strip limiting ring 14.

[0032] During operation, the spring 5 is respectively fitted with the first lifting ring 15 and the second lifting ring 41 through the annular bearing 51, so that the adjustment sleeve 4 and the first lifting ring 15 have an elastic force to move away from each other. At this time, the second strip-shaped limit ring 42 and the first strip-shaped limit ring 14 are engaged with each other to limit the rotation of the adjustment sleeve 4. When the screw rod 3 needs to be rotated, the adjustment sleeve 4 is subjected to a lifting force to control its rotation.

[0033] like Figure 4 As shown, the other end of the screw rod 3 is fixedly connected to a second circular plate 33 .

[0034] During operation, the second circular plate 33 can prevent the screw rod 3 from excessively sinking;

[0035] Working principle: the vent 11 serves as the air distribution hole in the boiler by the hood body 1, and the size of its relative cross section can be adjusted by the relative position of the circular plate 2 and the blocking strip 21 in the vent 11 and the vertical groove 12, wherein the mutual sliding of the first circular plate 22 and the outer wall of the hood body 1 can increase the installation stability of the hood body 1 to the circular plate 2 and the blocking strip 21, the screw rod 3 is linked with multiple blocking strips 21 through the cooperation of the central circular plate 31 and the arc connecting rod 32, so that the lifting and lowering of the circular plate 2 and the blocking strip 21 can be controlled by adjusting the screw rod 3, the second circular plate 33 can prevent the screw rod 3 from excessively sinking, and the adjusting sleeve 4 is adjusted through the second circular plate 33. The lifting ring 41 is engaged with the first lifting ring 15, and after the convex strip on the side wall of the penetrating circular hole 13 and the strip groove on the outer wall of the screw rod 3 are engaged with each other, the screw rod 3 and the circular plate 2 can be lifted and lowered as a whole by rotating the second lifting ring 41. The spring 5 is respectively fitted with the first lifting ring 15 and the second lifting ring 41 through the annular bearing 51, so that the adjustment sleeve 4 and the first lifting ring 15 have an elastic force to move away from each other. At this time, the second strip limit ring 42 is engaged with the first strip limit ring 14 to limit the rotation of the adjustment sleeve 4. When the screw rod 3 needs to be rotated, an upward force is applied to the adjustment sleeve 4 to control its rotation.

[0036] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. An energy-saving hood suitable for a boiler in a power plant, characterized in that: The hood body (1) comprises a hood main body (1), the outer wall of the hood main body (1) is provided with a plurality of ventilation holes (11), the plurality of ventilation holes (11) are provided along the circumferential direction of the outer wall of the hood main body (1) at equally divided angles, the inner wall of the hood main body (1) is provided with a plurality of vertical grooves (12), the plurality of vertical grooves (12) are respectively connected to the plurality of ventilation holes (11), a circular plate (2) is slidably mounted between the inner walls of the ventilation holes (11), a sealing strip (21) is fixedly connected to one side of the circular plate (2), the sealing strip (21) is slidably mounted between the inner walls of the vertical grooves (12), a first circular plate (22) is fixedly connected to the other side of the circular plate (2), and the side wall of the first circular plate (22) is in contact with the outer wall of the hood main body (1).

2. The energy-saving hood for a boiler in a power plant according to claim 1, characterized in that: A through circular hole (13) is provided at the center of the top of the hood body (1), a screw rod (3) is slidably mounted between the inner walls of the through circular hole (13), the outer wall convex strip of the screw rod (3) and the inner wall strip groove of the through circular hole (13) are mutually engaged, one end of the screw rod (3) extends into the interior of the hood body (1), one end of the screw rod (3) is fixedly connected to a centralizing circular plate (31), the side wall of the centralizing circular plate (31) is fixedly connected to a plurality of arc-shaped connecting rods (32), and the plurality of arc-shaped connecting rods (32) are respectively fixedly connected to the side walls of a plurality of blocking strips (21).

3. The energy-saving hood for a boiler in a power plant according to claim 2 is characterized in that: A first strip-shaped limiting ring (14) is fixedly connected to the outer wall of the hood body (1) near the top edge, and a first hanging ring (15) is fixedly connected to the top center of the hood body (1).

4. The energy-saving hood for a boiler in a power plant according to claim 3 is characterized in that: The screw rod (3) is externally threadedly mounted with an adjusting sleeve (4), a second lifting ring (41) is fixedly connected below the adjusting sleeve (4), and the second lifting ring (41) is engaged with the first lifting ring (15).

5. The energy-saving hood for a boiler in a power plant according to claim 4, characterized in that: A spring (5) is installed between the second lifting ring (41) and the first lifting ring (15), and annular bearings (51) are fixedly connected to both ends of the spring (5), and the two annular bearings (51) are respectively fitted with the first lifting ring (15) and the second lifting ring (41).

6. The energy-saving hood for a boiler in a power plant according to claim 5, characterized in that: A second strip-shaped limiting ring (42) is fixedly connected to the bottom of the second lifting ring (41), and the second strip-shaped limiting ring (42) can engage with the first strip-shaped limiting ring (14).

7. The energy-saving hood for a boiler in a power plant according to claim 6, characterized in that: The other end of the screw rod (3) is fixedly connected to a second circular plate (33).

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