Baffle door for flue gas and air of power plant boiler

Abstract

The utility model discloses a power plant boiler flue gas and wind baffle door, which comprises a support assembly and a driving assembly, the driving assembly comprises a first driving shaft, a second driving shaft, a third driving shaft and a fourth driving shaft, the outer surface of the first driving shaft is fixedly connected with a first blade, the outer part of the second driving shaft is fixedly connected with a second blade, and the second blade is fixedly connected with a third blade. Third blades are fixedly connected to the outer surface of the third driving shaft, fourth blades are fixedly connected to the outer surface of the fourth driving shaft, sealing blocks are fixedly connected to the bottoms of the first blades and the bottoms of the third blades, placing cavities are formed in the sealing blocks, and sliding grooves are formed in the bottoms of the placing cavities. An electric push rod is installed in the containing cavity, the output end of the electric push rod is connected with a clamping block, connecting grooves are formed in the tops of the second blade and the fourth blade, clamping grooves are formed in the bottoms of the connecting grooves, and the problem that an existing baffle door is poor in sealing performance is solved.

Description

Technical Field

[0001] This utility model belongs to the field of power plant boiler equipment technology, specifically relating to a damper door for flue gas in power plant boilers. Background Technology

[0002] Flue gas dampers for power plant boilers are one of the key pieces of equipment in the flue gas and air duct systems of thermal power plant boiler units. They are mainly used to regulate the flow rate of the medium in the flue gas and air duct systems, and also have the function of cutting off the flow of the medium.

[0003] With the continuous development of power plant boilers, the application scope of flue gas dampers in power plant boilers is gradually increasing, and people's requirements for dampers are also increasing. However, traditional dampers often have poor sealing performance during use, which has become a problem that needs to be solved by people in this field. Utility Model Content

[0004] The purpose of this invention is to address the problems mentioned in the background art by using existing damper doors for flue gas in power plant boilers.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a damper for flue gas in power plant boilers, comprising a support assembly and a drive assembly. The drive assembly includes a first drive shaft, a second drive shaft, a third drive shaft, and a fourth drive shaft. A first blade is fixedly connected to the outer surface of the first drive shaft, a second blade is fixedly connected to the outer surface of the second drive shaft, a third blade is fixedly connected to the outer surface of the third drive shaft, and a fourth blade is fixedly connected to the outer surface of the fourth drive shaft. A sealing block is fixedly connected to the bottom of both the first and third blades. A placement cavity is formed inside the sealing block, and a sliding groove is formed at the bottom of the placement cavity. An electric push rod is installed inside the placement cavity, and a locking block is connected to the output end of the electric push rod. A connecting groove is formed at the top of both the second and fourth blades, and a locking slot is formed at the bottom of the connecting groove. The locking block engages with the locking slot.

[0006] The present invention further explains that the support assembly includes a left frame and a right frame arranged in the vertical direction, and an upper frame and a lower frame arranged in the horizontal direction.

[0007] This utility model further illustrates that the support component has an overall square-shaped structure.

[0008] This utility model further illustrates that bearings are provided on the outer sides of both the left and right frames.

[0009] The present invention further explains that the bearing is provided in four sets, and the four sets of bearings are respectively connected to the first drive shaft, the second drive shaft, the third drive shaft and the fourth drive shaft in the drive assembly.

[0010] The present invention further explains that a sealing gasket is provided on the surface of the card slot that contacts the card block.

[0011] Compared with the prior art, the beneficial effects achieved by this utility model are: This utility model,

[0012] With a drive assembly, four drive shafts drive the first to fourth blades to rotate synchronously, realizing the opening and closing of the baffle door and adjusting the flue gas flow accuracy. By activating the electric push rod, the locking block is moved and engages with the slot, so that when the baffle door is closed, the blades can be positioned and locked. Attached Figure Description

[0013] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a three-dimensional side sectional view of the present invention;

[0016] Figure 3 This is the utility model Figure 2 Enlarged structural diagram of region A in the middle;

[0017] Figure 4 This is a side view sectional structural diagram of the present invention;

[0018] Figure 5 This is the utility model Figure 3 A magnified structural diagram of region B in the middle.

[0019] In the diagram: 1. Support assembly; 101. Left frame; 102. Right frame; 103. Upper frame; 104. Lower frame; 2. Bearing; 3. Drive assembly; 301. First drive shaft; 302. Second drive shaft; 303. Third drive shaft; 304. Fourth drive shaft; 4. First blade; 5. Second blade; 6. Third blade; 7. Fourth blade; 8. Sealing block; 9. Connecting groove; 10. Placement cavity; 11. Slide groove; 12. Electric push rod; 13. Locking block; 14. Locking groove; 15. Sealing gasket. Detailed Implementation

[0020] The following detailed, non-limiting description of the present invention, in conjunction with preferred embodiments and accompanying drawings, is provided. Obviously, the described embodiments are merely some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0021] Please see Figure 1-5 The present invention provides a technical solution: a damper door for flue gas in power plant boilers, including a support assembly 1. The support assembly 1 includes a left frame 101 and a right frame 102 arranged in the vertical direction, and an upper frame 103 and a lower frame 104 arranged in the horizontal direction. The support assembly 1 has an overall U-shaped structure and can achieve stable support for the device.

[0022] A drive assembly 3 is provided between the left frame 101 and the right frame 102. The drive assembly 3 includes a first drive shaft 301, a second drive shaft 302, a third drive shaft 303 and a fourth drive shaft 304. Bearings 2 are provided on the outer sides of both the left frame 101 and the right frame 102, and there are four sets of bearings. The four sets of bearings 2 are respectively connected to the first drive shaft 301, the second drive shaft 302, the third drive shaft 303 and the fourth drive shaft 304 in the drive assembly 3.

[0023] A first blade 4 is fixedly connected to the outer surface of the first drive shaft 301; a second blade 5 is fixedly connected to the outer surface of the second drive shaft 302; a third blade 6 is fixedly connected to the outer surface of the third drive shaft 303; and a fourth blade 7 is fixedly connected to the outer surface of the fourth drive shaft 304. The first drive shaft 301, second drive shaft 302, third drive shaft 303, and fourth drive shaft 304 are the core transmission components of this device. The output end of the motor is connected to a drive pulley, which drives a driven pulley to rotate via a belt. Multiple sets of driven pulleys are provided, each set of driven pulleys... A corresponding drive shaft is provided, which allows the motor to evenly distribute power to the first drive shaft 301 to the fourth drive shaft 304. When the first drive shaft 301 to the fourth drive shaft 304 start to rotate, the blades fixedly connected to them can rotate synchronously. When the drive assembly 3 rotates clockwise, the first blade 4 to the fourth blade 7 can rotate clockwise with the drive assembly 3, thereby opening the baffle door. When the drive assembly 3 rotates counterclockwise, the first blade 4 to the fourth blade 7 can rotate counterclockwise with the drive assembly 3, thereby closing the baffle door.

[0024] The first blade 4 to the fourth blade 7 of the baffle door rotate. When the opening is small, the area for smoke and air circulation becomes smaller and the smoke and air flow rate decreases accordingly. When the opening is large, the area for smoke and air circulation increases and the smoke and air flow rate increases accordingly, thereby achieving automatic adjustment of the smoke and air flow rate.

[0025] The bottom of the first blade 4 and the third blade 6 are both fixedly connected to a sealing block 8. The sealing block 8 has an internal placement cavity 10, and the bottom of the placement cavity 10 has a sliding groove 11. An electric push rod 12 is installed inside the placement cavity 10, and the output end of the electric push rod 12 is connected to a locking block 13. The top of the second blade 5 and the fourth blade 7 are both provided with connecting grooves 9, and the bottom of the connecting grooves 9 has a locking groove 14. The locking block 13 engages with the locking groove 14. When the first blade 4, the second blade 5, the third blade 6, and the fourth blade... When the blade 7 rotates synchronously and is set in a vertical direction, the sealing block 8 and the connecting groove 9 are fitted together, achieving a preliminary connection. At this time, the electric push rod 12 is activated, and the output end of the electric push rod 12 can push the locking block 13 to move along the slide groove 11 until the locking block 13 is engaged with the locking groove 14. This can position and self-lock the first blade 4, the second blade 5, the third blade 6, and the fourth blade 7. The surface of the locking groove 14 that contacts the locking block 13 is provided with a sealing gasket 15 to ensure the stability and sealing of the baffle door when it is closed.

[0026] Working principle: When the drive assembly 3 is running, the four drive shafts rotate synchronously, driving the first blade 4 to the fourth blade 7, which are fixedly connected to the outer surface, to rotate, thereby realizing the opening and closing of the baffle door. At the same time, it can automatically adjust the smoke and air flow. During the closing process of the first blade 4 to the fourth blade 7, the sealing block 8 at the bottom of the first blade 4 and the third blade 6 fits with the connecting groove 9 at the top of the second blade 5 and the fourth blade 7, realizing the initial connection. Then, the electric push rod 12 in the placement cavity 10 is activated. The output end of the electric push rod 12 can push the locking block 13 to move along the slide groove 11 until the locking block 13 engages with the locking groove 14 at the bottom of the connecting groove 9, thereby positioning and locking the first blade 4 to the fourth blade 7, ensuring the stability and sealing of the baffle door when it is closed.

[0027] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0028] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. Damper gate for power plant boiler flue gases, comprising a support assembly (1) and a drive assembly (3), characterized in that: The driving assembly (3) comprises a first driving shaft (301), a second driving shaft (302), a third driving shaft (303) and a fourth driving shaft (304), the outer surface of the first driving shaft (301) is fixedly connected with a first blade (4), the outer surface of the second driving shaft (302) is fixedly connected with a second blade (5), the outer surface of the third driving shaft (303) is fixedly connected with a third blade (6), and the outer surface of the fourth driving shaft (304) is fixedly connected with a fourth blade (7). The bottom of the first blade (4) and the third blade (6) is fixedly connected with a sealing block (8), the inside of the sealing block (8) is provided with a placing cavity (10), the bottom of the placing cavity (10) is provided with a sliding groove (11), the inside of the placing cavity (10) is provided with an electric push rod (12), the output end of the electric push rod (12) is connected with a clamping block (13), the top of the second blade (5) and the fourth blade (7) is provided with a connecting groove (9), the bottom of the connecting groove (9) is provided with a clamping groove (14), and the clamping block (13) is clamped and connected with the clamping groove (14).

2. The damper door for a utility boiler flue gas according to claim 1, characterized in that: The supporting assembly (1) comprises left and right frames (101 and 102) arranged in the vertical direction and upper and lower frames (103 and 104) arranged in the horizontal direction.

3. The power plant boiler air damper gate of claim 2, wherein: The supporting assembly (1) has an overall H-shaped structure.

4. The power plant boiler air damper gate of claim 3, wherein: The outer sides of the left and right frames (101 and 102) are provided with bearings (2).

5. The power plant boiler air damper door of claim 4, wherein: The bearings (2) are provided in four groups, and the four groups of bearings (2) are respectively connected with the first driving shaft (301), the second driving shaft (302), the third driving shaft (303) and the fourth driving shaft (304) in the driving assembly (3) in a corresponding manner.

6. The power plant boiler air damper gate of claim 5, wherein: The surface of the clamping groove (14) in contact with the clamping block (13) is provided with a sealing gasket (15).

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