Automatic opening and closing device for monitoring slag discharge opening of boiler furnace of thermal power plant

Abstract

The utility model discloses an automatic opening and closing device for monitoring a slag discharge port of a boiler furnace of a thermal power plant, which is arranged at a waste slag observation channel (1) of the slag discharge port and comprises an extension pipe (2) connected with the waste slag observation channel (1), a positioning ring (3) is arranged at the outer end of the extension pipe (2), a motor bracket (5) is arranged at the lower end of the positioning ring (3), and a motor (6) is arranged at the lower part of the motor bracket (5); a plurality of bearing seats (7) are evenly arranged on the circumferential face of the positioning ring (3), and shaft rods (8) are arranged in the bearing seats (7). Quick opening and closing of the slag discharge observation opening are achieved through the linkage type opening and closing structure, video monitoring equipment can conveniently observe the slag condition in a hearth at regular time, the inner side of the transparent window can be protected, dust adhering to the inner side of the transparent window is reduced, and the definition of the transparent window is kept.

Description

Technical Field

[0001] This utility model relates to the field of boiler equipment, and in particular to an automatic opening and closing device for monitoring the ash discharge port of a boiler furnace in a thermal power plant. Background Technology

[0002] In thermal power boilers, slag forms at the bottom of the furnace after prolonged fuel combustion. Workers need to check for slag through the slag inspection port to ensure quick removal and proper boiler operation. To improve inspection efficiency, video monitoring and image processing technology are used to monitor slag formation at the furnace bottom. This avoids the risks of high temperatures and dust that workers might face from frequent close-up inspections of the slag discharge port. Workers can also observe remotely from a secure monitoring room, reducing the risk of accidental injury. For example, Chinese utility model patent CN217274199U discloses a slag well observation system used in coal-fired boilers of power plants, which can avoid the problem of slag retention. The slag well observation system used in coal-fired boilers of power plants includes a slag well observation channel, a compressed air source pipeline, and a compressed air pneumatic shut-off valve. The outer wall of the slag well is provided with a slag well insulation layer and an external protective plate. The slag well observation channel passes through the side wall of the slag well, the slag well insulation layer, and the external protective plate. A slag chute is provided at the bottom of the slag well observation channel. A turbine partition is provided at the opening on the outside of the slag well observation channel. The compressed air source pipeline is connected to a compressed air nozzle through the compressed air pneumatic shut-off valve. The compressed air nozzle is located inside the slag well observation channel. In existing technologies, video surveillance is installed at the outer end of the slag observation channel. A high-temperature resistant and wear-resistant transparent observation window is installed at the beginning of the slag observation channel. However, due to the dust rising inside the furnace, the clarity of the observation window is not ideal, and the video surveillance is not clear when it is captured. Utility Model Content

[0003] The purpose of this invention is to provide an automatic opening and closing device for monitoring the ash discharge port of a boiler furnace in a thermal power plant. This invention achieves rapid opening and closing of the ash discharge observation port through a linkage opening and closing structure, facilitating regular observation of the ash condition inside the furnace by video monitoring equipment. It also provides protection for the inside of the transparent window, reducing dust adhesion and maintaining the clarity of the window.

[0004] The technical solution of this utility model is as follows: An automatic opening and closing device for monitoring the ash discharge port of a boiler in a thermal power plant, installed at the waste ash observation channel of the ash discharge port, including an extension pipe connected to the waste ash observation channel, a positioning ring at the outer end of the extension pipe, a motor bracket at the lower end of the positioning ring, and a motor at the lower part of the motor bracket; multiple bearing seats are evenly arranged on the circumference of the positioning ring, a shaft is provided inside the bearing seat, and a linkage rod group is provided between the outer ends of adjacent shafts; the rotating end of the motor is connected to one of the shafts; a central seat is provided at the center of the positioning ring, and a rotatable closing plate is provided on the circumference of the central seat, one end of the closing plate is connected to the inner end of the shaft; a transparent viewing window corresponding to the closing plate is provided on the outer end of the positioning ring.

[0005] In the aforementioned automatic opening and closing device for monitoring the ash discharge port of a boiler furnace in a thermal power plant, one end of the extension tube is provided with a first annular plate, and one end of the positioning ring is provided with a second annular plate. The first annular plate and the second annular plate are connected by bolts.

[0006] In the aforementioned automatic opening and closing device for monitoring the ash discharge port of a boiler furnace in a thermal power plant, the motor bracket includes side plates arranged on both sides of a positioning ring, and a horizontal plate is provided between the ends of the side plates, with the motor mounted on the horizontal plate.

[0007] In the aforementioned automatic opening and closing device for monitoring the ash discharge port of a boiler furnace in a thermal power plant, the linkage group includes a fixed clamping block connected to a shaft. One end of the fixed clamping block is provided with a clamping end that fits into the shaft, and a connecting rod is hinged between adjacent fixed clamping blocks.

[0008] In the aforementioned automatic opening and closing device for monitoring the ash discharge port of a boiler furnace in a thermal power plant, the connecting rod includes a rod body, an end sleeve at the end of the rod body, an end shaft connected to the end sleeve via a universal ball joint structure, and the end shaft is connected to a fixed clamping block.

[0009] In the aforementioned automatic opening and closing device for monitoring the ash discharge port of a boiler furnace in a thermal power plant, the inner and outer surfaces of the closing plate have arc-shaped portions.

[0010] Compared with the prior art, the present invention has the following advantages:

[0011] 1. In this utility model, under normal conditions, multiple closed plates are laid flat, and the channels inside the extension tube are closed. The situation inside the furnace cannot be observed through the transparent window, which protects the inside of the transparent window, reduces dust adhesion to the inside of the transparent window, and maintains the clarity of the transparent window. When it is necessary to observe the situation inside the furnace, the motor outputs power to drive one of the shafts to rotate. Adjacent shafts are connected by a linkage group, which drives the other shafts to rotate simultaneously. The inner end of the shaft is connected to the closed plate, and the closed plate rotates and becomes upright. Multiple channels are presented inside the positioning ring, and the condition of the slag inside the furnace can be observed from the outside of one end of the positioning ring. The linkage structure enables the rapid opening and closing of the channels inside the positioning ring, which facilitates the video monitoring equipment to observe the condition of the slag inside the furnace at regular intervals.

[0012] 2. The extension pipe and the positioning ring are connected by a flange structure, which is simple in structure and easy to connect.

[0013] 3. The inner and outer surfaces of the closing plate have arc-shaped parts. After the closing plate rotates, the channel inside the positioning ring opens, and the heat flow inside the furnace will dissipate outward. The arc-shaped parts can play a good guiding role. Attached Figure Description

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

[0015] Figure 2 This is a schematic diagram of the positioning ring;

[0016] Figure 3 This is a schematic diagram of a fixed clamping block;

[0017] Figure 4 This is a schematic diagram of the end shaft;

[0018] Figure 5 This is a schematic diagram of a closed piece;

[0019] Figure 6 This is a schematic diagram of a transparent viewport.

[0020] The markings in the attached diagram are as follows: 1-Waste residue observation channel, 2-Extension tube, 3-Positioning ring, 5-Motor bracket, 6-Motor, 7-Bearing seat, 8-Shaft, 9-Linkage rod assembly, 10-Center seat, 11-Closed plate, 12-First annular plate, 13-Second annular plate, 15-Side plate, 16-Horizontal plate, 17-Fixed clamping block, 18-Clamping end, 19-Connecting rod, 20-Rod body, 21-End sleeve, 22-End shaft, 23-Transparent window. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present invention.

[0022] Example: An automatic opening and closing device for monitoring the ash discharge port of a thermal power plant boiler furnace, installed at the ash observation channel 1 of the ash discharge port, including an extension pipe 2 connected to the ash observation channel 1, as shown in the attached figure. Figure 1 As shown, a positioning ring 3 is installed at the outer end of the extension tube 2. One end of the extension tube 2 is provided with a first annular piece 12, and one end of the positioning ring 3 is provided with a second annular piece 13. The first annular piece 12 and the second annular piece 13 are connected by bolts. The connection between the extension tube and the positioning ring is achieved through a flange structure, which is simple in structure and easy to connect. The extension tube can create a certain distance between the waste observation channel and the positioning ring, reducing the impact of high temperature on the positioning ring and the components on the positioning ring. A motor bracket 5 is installed at the lower end of the positioning ring 3, and a motor 6 is installed at the lower part of the motor bracket 5. The motor bracket 5 includes side plates 15 on both sides of the positioning ring 3, and a horizontal plate 16 is installed between the ends of the side plates 15. The motor 6 is installed on the horizontal plate 16. The overall structure of the motor bracket is simple and easy to connect. The ends of the side plates have bent surfaces, which are connected to the horizontal plates by bolts. Multiple bearing seats 7 are evenly installed on the circumference of the positioning ring 3, as shown in the attached figure. Figure 2 As shown, a shaft 8 is installed inside the bearing housing 7, and a linkage rod group 9 is installed between the outer ends of adjacent shafts 8. The rotating end of the motor 6 is connected to one of the shafts 8. A center seat 10 is installed at the center of the positioning ring 3. The side of the center seat has a side support that connects to the inner side of the positioning ring. A rotatable closing piece 11 is installed on the circumferential surface of the center seat 10, as shown in the attached figure. Figure 5 As shown, one end of the closing piece has a shaft embedded in the central seat, enabling the closing piece to rotate. The inner and outer surfaces of the closing piece 11 have arc-shaped portions. This structure enhances the structural strength and stability of the closing piece. The outer end of the positioning ring 3 is equipped with a transparent window 23 corresponding to the closing piece 11, as shown in the attached diagram. Figure 6 As shown, the transparent window and the inner wall of the positioning ring are connected by a sealed structure, making the extension tube and the waste observation channel sealed. One end of the closing plate 11 is connected to the inner end of the shaft 8. The power output by the motor is transmitted to the shaft through the linkage group, causing the closing plate to rotate and the positioning ring to open. The video monitoring equipment can monitor the inner wall of the furnace through the transparent window. The closing plate opens at a time. The motor reverses to reset the closing plate, closing the channel inside the positioning ring and reducing dust adhesion to the inside of the transparent window.

[0023] The linkage assembly 9 includes a fixed clamping block 17 connected to the shaft 8, as shown in the attached figure. Figure 3As shown, one end of the fixed clamping block 17 is provided with a clamping end 18 that fits with the shaft 8. The clamping end is a circular hole, and the shaft is set in the circular hole. One end of the circular hole has a transverse groove that communicates with the outside. A fixing bolt is provided at the transverse groove. Tightening the fixing bolt ensures a stable connection between the fixed clamping block and the shaft. Adjacent fixed clamping blocks 17 are hinged to a connecting rod 19. The connecting rod 19 includes a rod body 20, and an end sleeve 21 is installed at the end of the rod body 20. An end shaft 22 is connected to the end sleeve 21 through a universal ball joint structure, as shown in the attached figure. Figure 4 As shown, the end shaft 22 is connected to the fixed clamping block 17. One end of the shaft has a nut. The end shaft passes through the fixed clamping block and then the nut is tightened. The positioning ring is a circular structure. To avoid interference during linkage, the end sleeve is connected to the end shaft via a universal ball joint. This movable connection between the rod and the fixed clamping block effectively avoids this situation. This utility model, based on the cooperation of motor drive and linkage structure, realizes the opening and closing of the waste slag port, meeting the furnace monitoring requirements.

[0024] The working principle of this utility model is as follows: Under normal conditions, multiple closed plates 11 are laid flat, and the channel inside the extension tube 2 is closed. The situation inside the furnace cannot be observed through the transparent window 23, thus protecting the inside of the transparent window 23, reducing dust adhesion to the inside of the transparent window 23, and maintaining the clarity of the transparent window 23. When it is necessary to observe the situation inside the furnace, the motor 6 is mounted on the motor bracket 5 below the positioning ring 3, and its rotating end is connected to a shaft 8. When the motor 6 starts to output power, the shaft 8 connected to it begins to rotate. Since adjacent shafts 8 are connected by a linkage group 9, the linkage group 9 consists of a fixed clamping block 17 connected to the shaft 8 and a connecting rod 19 hinged between adjacent fixed clamping blocks 17. The structure consists of a connecting rod 19 connected to the end shaft via a ball joint, which in turn drives the other shafts 8 to rotate synchronously. The rotation of the shafts 8 causes the connected closing plate 11 to rotate around the central seat 10 until it is upright. At this time, multiple channels are presented inside the positioning ring 3. The video monitoring equipment located on the outside of one end of the positioning ring 3 can clearly observe the condition of the waste slag in the furnace through the transparent window. After the observation is completed, the motor 6 reverses and the shaft 8 rotates in the opposite direction, driving the closing plate 11 to reset. At the same time, one end of the extension tube 2 is bolted to the second annular plate 13 at one end of the positioning ring 3 via the first annular plate 12. This not only makes installation convenient but also keeps the waste slag observation channel 1 at a certain distance from the positioning ring 3, reducing the impact of high temperature on the positioning ring 3 and related components.

[0025] The above embodiments merely illustrate the implementation of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. Furthermore, in these embodiments, "up," "down," "left," "right," "front," and "back" represent relative positions only, not absolute positions. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. An automatic opening and closing device for monitoring the ash discharge port of a boiler furnace in a thermal power plant, installed at the waste ash observation channel (1) of the ash discharge port, characterized in that: The device includes an extension tube (2) connected to the waste observation channel (1), an extension tube (2) with a positioning ring (3) at its outer end, a motor bracket (5) at its lower end, and a motor (6) at the lower part of the motor bracket (5); a plurality of bearing seats (7) are evenly arranged on the circumferential surface of the positioning ring (3), a shaft (8) is provided inside the bearing seat (7), and a linkage rod group (9) is provided between the outer ends of adjacent shafts (8); the rotating end of the motor (6) is connected to one of the shafts (8); a center seat (10) is provided at the center of the positioning ring (3), and a rotatable closing piece (11) is provided on the circumferential surface of the center seat (10), one end of the closing piece (11) is connected to the inner end of the shaft (8); a transparent window (23) corresponding to the closing piece (11) is provided on the outer end of the positioning ring (3).

2. The automatic opening and closing device for monitoring the ash discharge port of a boiler furnace in a thermal power plant according to claim 1, characterized in that: One end of the extension tube (2) is provided with a first annular piece (12), and one end of the positioning ring (3) is provided with a second annular piece (13). The first annular piece (12) and the second annular piece (13) are connected by bolts.

3. The automatic opening and closing device for monitoring the ash discharge port of a boiler furnace in a thermal power plant according to claim 1, characterized in that: The motor bracket (5) includes side plates (15) on both sides of the positioning ring (3), and a horizontal plate (16) is provided between the ends of the side plates (15), and the motor (6) is mounted on the horizontal plate (16).

4. The automatic opening and closing device for monitoring the ash discharge port of a boiler furnace in a thermal power plant according to claim 1, characterized in that: The linkage group (9) includes a fixed clamping block (17) connected to the shaft (8). One end of the fixed clamping block (17) is provided with a clamping end (18) that fits with the shaft (8). A connecting rod (19) is hinged between adjacent fixed clamping blocks (17).

5. The automatic opening and closing device for monitoring the ash discharge port of a boiler furnace in a thermal power plant according to claim 4, characterized in that: The connecting rod (19) includes a rod body (20), and an end sleeve (21) is provided at the end of the rod body (20). An end shaft (22) is connected inside the end sleeve (21) via a universal ball structure. The end shaft (22) is connected to the fixed clamping block (17).

6. The automatic opening and closing device for monitoring the ash discharge port of a boiler furnace in a thermal power plant according to claim 1, characterized in that: The closed piece (11) has arc-shaped portions on its inner and outer surfaces.

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