Maintenance hand hole additionally arranged on ash conveying spiral barrel body of ash hopper of second flue and third flue of boiler

Abstract

The utility model discloses a boiler second-third flue ash hopper ash conveying spiral barrel additionally provided with an overhauling hand hole, and belongs to the field of boilers. The boiler second-third flue ash hopper ash conveying spiral barrel additionally provided with the overhauling hand hole comprises a barrel body, a fixing disc is fixedly assembled on the outer side of the barrel body, a servo motor is fixedly assembled on the outer side of the fixing disc, and a power output shaft of the servo motor is fixedly connected with a rotating rod; a spiral sheet is fixedly assembled on the outer edge of the rotating rod; the square hole is formed in the barrel body for mounting the square frame, so that a sealing door can be opened for overhauling when needed, the problem that the boiler is forced to be shut down due to the fact that large-area accumulated dust in a flue falls off to press and stop a spiral sheet during operation of the boiler and then the dust cannot be cleaned is effectively solved, and normal operation of the boiler is safely and reliably guaranteed; the scheme is simple, construction is convenient, cost is low, the structure of the barrel body is not changed, normal operation and ash conveying of the spiral pieces are not affected, only the sealing door needs to be opened when the device is needed, and practicability of the device is improved.

Description

Technical Field

[0001] The present application relates to the technical field of boilers, and in particular to adding a maintenance hand hole to the ash conveying spiral cylinder of the ash hopper of the second and third flue of the boiler. Background Art

[0002] For waste incineration plants, the problem of coking and ash accumulation in the flue of the incinerator has always been a common problem faced by the industry. The outlet of our incinerator is configured as four flue gas channels arranged in a serpentine pattern. The second and third flues share a single ash hopper. A set of ash conveying spirals is installed at the bottom of the ash hopper. The spirals are single-axis spirals with a cylindrical shell. An ash drop pipe is installed on one side of the shell and connected to the incinerator furnace. During boiler operation, ash that falls from the heating surface of the vertical second and third flue water-cooled walls or the slope of the ash hopper is transported to the incinerator's ember grate via the ash hopper ash conveying spirals. The grate pushes the accumulated ash to the slag outlet, completing the ash conveying.

[0003] At present, the original design of the ash conveying spiral can only ensure normal operation when there is no abnormal ash accumulation and coking in the boiler. As the boiler runs for a long time, the ash accumulation and coking in the second and third flues will become more and more serious, and gradually large pieces of ash will hang on the wall. When using steam soot blowing or shock wave soot blowing equipment in the flue to blow soot, large pieces of ash and coke hanging on the wall of the flue will be blown off during certain periods of time. When the fallen ash or coke blocks exceed the conveying capacity of the ash hopper ash conveying spiral, the spiral will be overloaded and the spiral will trip. After tripping, if the ash pressing on the spiral is not cleaned, the spiral cannot be started again. When this happens, it is usually impossible to clear it manually due to the high temperature in the ash hopper (about 700℃) and the large volume of the fallen ash, which means that the flue ash hopper cannot convey ash normally. When it is necessary, the boiler can only be shut down for processing, which seriously affects the safe operation of the boiler. Utility Model Content

[0004] In view of the deficiencies of the prior art, the present invention provides a boiler secondary and tertiary flue ash hopper ash conveying spiral cylinder with additional maintenance hand holes, which overcomes the deficiencies of the prior art and aims to solve the problems in the background technology.

[0005] In order to achieve the above-mentioned purpose, the present application adopts the following technical solution: an inspection hand hole is added to the ash conveying spiral cylinder of the second and third flue ash hoppers of the boiler, including a cylinder body, the outer side of the cylinder body is fixedly equipped with a fixed plate, the outer side of the fixed plate is fixedly equipped with a servo motor, the power output shaft of the servo motor is fixedly connected to a rotating rod, the outer edge of the rotating rod is fixedly equipped with a spiral sheet, the outer edge of the spiral sheet is fixedly connected to one end of the connecting rod, and the other end of the connecting rod is fixedly connected to a scraper strip, a square hole is opened through the inner wall of the lower part of the cylinder body, a square frame is fixedly equipped with a square frame, two slide grooves are symmetrically provided at the bottom of the frame, and two sliders are slidably connected to the inner walls of the two slide grooves, the bottoms of the two sliders are fixedly equipped with sealing doors, the outer side of the sealing door is fixedly equipped with a connecting block, the outer side of the frame is fixedly equipped with a protective cover, the inner wall of the protective cover is slidably connected to a pull rod, the outer edge of the pull rod is fixedly equipped with a disc 1, the top of the disc 1 is fixedly connected to one end of a spring, and the other end of the spring is fixedly connected to disc 2.

[0006] As a preferred embodiment, the outer edge of the scraper bar is in contact with the inner wall of the cylinder body, and the number of the connecting rods is two and the two connecting rods are symmetrically arranged on both sides of the spiral sheet.

[0007] By adopting the above technical solution, when the rotating rod drives the spiral piece to rotate and transport the accumulated dust, it can drive the connecting rod and the scraper to rotate together, and the scraper can be used to scrape off the accumulated dust adhering to the inner wall of the cylinder body.

[0008] As a preferred embodiment, the second disc is slidably connected to the outer edge of the pull rod, the pull rod is passed through the middle of the spring, the first disc, the spring and the second disc are all arranged in the inner cavity of the protective cover, a through hole is opened through the top of the protective cover, the pull rod is slidably connected to the inner wall of the through hole, and a pull plate is fixedly installed on the top of the pull rod.

[0009] By adopting the above technical solution, pulling the pull plate can drive the bottom end of the pull rod to move upward, and releasing the pull plate can drive the bottom end of the pull rod to reset downward with the help of the force of the spring.

[0010] As a preferred embodiment, a socket is provided on the inner wall of the connecting block, and the end of the pull rod away from the pull plate is plugged into the inner wall of the socket.

[0011] By adopting the above technical solution, the connection block and the sealing door can be positioned to ensure that the sealing door will not slide easily on the bottom of the frame.

[0012] As a preferred embodiment, the number of the square holes and the number of the square frames are six, and the six square holes and the square frames are distributed in parallel at the lower position of the cylinder body, and the size of the square holes is 300mm*350mm.

[0013] By adopting the above technical solution, when a large area of ​​ash accumulation occurs in the flue and falls to crush the spiral blade, making it impossible to start, the sealing door can be removed for manual ash removal. When the ash amount is cleared to within the conveying capacity of the spiral blade, the spiral blade can be easily started. When ensuring that the spiral blade can operate normally, the sealing door can be installed and sealed.

[0014] As a preferred embodiment, a ball bearing is fixedly installed on the side of the cylinder body away from the fixed disk, the end of the rotating rod away from the servo motor is fixedly connected to the inner ring of the ball bearing, and the end of the rotating rod close to the servo motor is rotatably connected to the inner wall position of the fixed disk.

[0015] By adopting the above technical solution, the stability of the rotating rod during rotation can be guaranteed, and it can be guaranteed that the position of the rotating rod will not easily deviate or swing during rotation, and the rotating rod will not interfere with the fixed disk during rotation.

[0016] As a preferred embodiment, the shape of the slider is adapted to the shape of the inner wall of the slide groove and both are convex, and the top of the sealing door is fitted with the bottom of the frame and is slidably connected.

[0017] By adopting the above technical solution, the draggable sealed door drives the slider to slide on the inner wall of the sliding groove, and the slider will not separate from the inner wall of the sliding groove.

[0018] Beneficial effects of this application:

[0019] 1. The ash conveying spiral cylinder of the second and third flue ash hoppers of the boiler is additionally equipped with an inspection hand hole. By opening a square hole on the cylinder body to install a square frame, the sealed door can be opened for inspection when needed. This effectively solves the problem of large-scale ash accumulation in the flue during boiler operation, which causes the spiral vanes to stop and cannot be cleaned, forcing the boiler to stop. It safely and reliably ensures the normal operation of the boiler. The square hole design is simple, easy to construct, and low-cost. It does not change the structure of the cylinder body and does not affect the normal operation of the spiral vanes to convey ash. When needed, only the sealed door needs to be opened, which improves the practicality of the device.

[0020] 2. The ash conveying spiral cylinder of the second and third flue ash hoppers of the boiler is additionally equipped with an inspection hand hole. By arranging a connecting rod and a scraper, the rotating rod can drive the connecting rod and the scraper to rotate together when driving the spiral piece to rotate and transport the accumulated ash, thereby scraping off the accumulated ash adhering to the inner wall of the cylinder body. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the overall structure of this application;

[0022] Figure 2 This is a schematic diagram of the cross-sectional structure of the cylinder of this application;

[0023] Figure 3 This is a schematic diagram of the expanded structure of this application;

[0024] Figure 4 This is a schematic diagram of the cross-sectional structure of this application;

[0025] Figure 5 For this application Figure 4 A in the middle is an enlarged structural diagram;

[0026] Figure 6 This is a schematic diagram of the square hole structure of this application.

[0027] Numbers in the figure: 1. Cylinder body; 2. Fixed disk; 3. Servo motor; 4. Rotating rod; 5. Spiral plate; 6. Connecting rod; 7. Scraper; 8. Frame; 9. Slide; 10. Slider; 11. Sealing door; 12. Connecting block; 13. Protective cover; 14. Pull rod; 15. Pull plate; 16. Disc 1; 17. Spring; 18. Disc 2; 19. Square hole. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments.

[0029] Reference Figure 1-6 The ash conveying spiral cylinder of the second and third flue ash hoppers of the boiler is equipped with an inspection hand hole, including a cylinder body 1. The outer side of the cylinder body 1 is fixedly equipped with a fixed plate 2. The outer side of the fixed plate 2 is fixedly equipped with a servo motor 3. The power output shaft of the servo motor 3 is fixedly connected to a rotating rod 4. The outer edge of the rotating rod 4 is fixedly equipped with a spiral piece 5. The outer edge of the spiral piece 5 is fixedly connected to one end of the connecting rod 6. The other end of the connecting rod 6 is fixedly connected to a scraper 7. A square hole 19 is opened through the inner wall below the cylinder body 1. The inner wall of the square hole 19 is fixedly equipped with a square hole. Frame 8, two slide grooves 9 are symmetrically opened at the bottom of the box 8, and the inner walls of the two slide grooves 9 are slidably connected to two sliders 10, the bottoms of the two sliders 10 are fixedly equipped with a sealing door 11, the outer side of the sealing door 11 is fixedly equipped with a connecting block 12, the outer side of the box 8 is fixedly equipped with a protective cover 13, the inner wall of the protective cover 13 is slidably connected to a pull rod 14, the outer edge of the pull rod 14 is fixedly equipped with a disc 16, the top of the disc 16 is fixedly connected to one end of a spring 17, and the other end of the spring 17 is fixedly connected to a disc 2 18.

[0030] See Figure 2The outer edge of the scraper 7 fits with the inner wall of the cylinder body 1. There are two connecting rods 6, and the two connecting rods 6 are symmetrically arranged on both sides of the spiral sheet 5, so that when the rotating rod 4 drives the spiral sheet 5 to rotate and transport the accumulated dust, it can drive the connecting rod 6 and the scraper 7 to rotate together, and use the scraper 7 to scrape off the accumulated dust adhering to the inner wall of the cylinder body 1.

[0031] See Figure 5 , disc 2 18 is slidably connected to the outer edge of the pull rod 14, the pull rod 14 is inserted into the middle of the spring 17, disc 16, spring 17 and disc 2 18 are all arranged in the inner cavity of the protective cover 13, and a through hole is opened at the top of the protective cover 13, the pull rod 14 is slidably connected to the inner wall position of the through hole, and a pull plate 15 is fixedly installed on the top of the pull rod 14, so that pulling the pull plate 15 can drive the bottom end of the pull rod 14 to move upward, and loosening the pull plate 15 can drive the bottom end of the pull rod 14 to reset downward with the help of the force of the spring 17.

[0032] See Figure 3 and Figure 5 A socket is provided on the inner wall of the connecting block 12, and the end of the pull rod 14 away from the pull plate 15 is inserted into the inner wall of the socket, so that the connecting block 12 and the sealing door 11 can be positioned to ensure that the sealing door 11 will not slide easily at the bottom of the frame 8.

[0033] See Figure 2 and Figure 6 The number of square holes 19 and square frames 8 are both six, and the six square holes 19 and square frames 8 are distributed in parallel at the lower position of the cylinder body 1. The size of the square hole 19 is 300mm*350mm, so that when a large area of ​​ash accumulation occurs in the flue and falls to crush the spiral piece 5 and cannot be started, the sealing door 11 can be removed for manual ash removal. When the ash amount is dredged to within the conveying capacity of the spiral piece 5, the spiral piece 5 can be easily started. When ensuring that the spiral piece 5 can operate normally, the sealing door 11 is installed and sealed.

[0034] See Figure 6 A ball bearing is fixedly assembled on the side of the cylinder body 1 away from the fixed disk 2, and the end of the rotating rod 4 away from the servo motor 3 is fixedly connected to the inner ring of the ball bearing, and the end of the rotating rod 4 close to the servo motor 3 is rotatably connected to the inner wall position of the fixed disk 2, so that the stability of the rotating rod 4 during rotation can be guaranteed, and it can be ensured that it will not easily deviate or swing in position during rotation, and the rotating rod 4 will not interfere with the fixed disk 2 during rotation.

[0035] See Figure 1The shape of the slider 10 is adapted to the shape of the inner wall of the slide groove 9 and is both convex. The top of the sealing door 11 is fitted with the bottom of the frame 8 and is slidably connected, so that the sealing door 11 can be pulled to drive the slider 10 to slide on the inner wall of the slide groove 9, and the slider 10 will not separate from the inner wall of the slide groove 9.

[0036] Working principle: When using the device, first drive the servo motor 3 to drive the rotating rod 4 to rotate, so that the rotating rod 4 can be used to transport the accumulated dust. The rotating rod 4 drives the spiral piece 5 to rotate and transport the accumulated dust, which can drive the connecting rod 6 and the scraper 7 to rotate together. The scraper 7 is used to scrape off the accumulated dust adhering to the inner wall of the cylinder body 1. When a large area of ​​accumulated dust falls in the flue and crushes the spiral piece 5, making it impossible to start, the pull plate 15 can be pulled to drive the bottom end of the pull rod 14 to move upward until the bottom end of the pull rod 14 is out of the inner wall position of the socket, and then the pull plate 15 can be pulled. The sealing door 11 slides at the bottom of the square frame 8, and then the ash can be manually removed through the square hole 19. When the ash amount is dredged to the conveying capacity of the spiral blade 5, the spiral blade 5 can be easily started to ensure that the spiral blade 5 can operate normally. Then pull the disc 16 again to drive the pull rod 14 to move upward, and then slide the sealing door 11 to the bottom of the square frame 8 to seal the square frame 8 until the bottom of the pull rod 14 corresponds to the position of the socket, and then the pull plate 15 can be released and the bottom end of the pull rod 14 can be driven downward to the inner wall position of the socket with the help of the force of the spring 17.

[0037] The above is only a preferred specific implementation method of the present application, but the scope of protection of the present application is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes based on the technical solution and utility model concept of the present application within the technical scope disclosed in the present application, and they should be covered by the scope of protection of the present application.

Claims

1. The ash conveying spiral cylinder of the boiler's second and third flue ash hopper is equipped with an additional maintenance hand hole, including the cylinder body (1), which is characterized by: The outer side of the cylinder body (1) is fixedly equipped with a fixed disk (2), the outer side of the fixed disk (2) is fixedly equipped with a servo motor (3), the power output shaft of the servo motor (3) is fixedly connected to a rotating rod (4), the outer edge of the rotating rod (4) is fixedly equipped with a spiral piece (5), the outer edge of the spiral piece (5) is fixedly connected to one end of a connecting rod (6), the other end of the connecting rod (6) is fixedly connected to a scraper (7), a square hole (19) is opened through the inner wall of the lower part of the cylinder body (1), the inner wall of the square hole (19) is fixedly equipped with a square frame (8), the bottom of the frame (8) is symmetrically opened There are two slide grooves (9), and the inner walls of the two slide grooves (9) are slidably connected to two sliders (10), the bottoms of the two sliders (10) are fixedly equipped with sealing doors (11), the outer sides of the sealing doors (11) are fixedly equipped with connecting blocks (12), the outer sides of the frame (8) are fixedly equipped with a protective cover (13), the inner wall of the protective cover (13) is slidably connected to a pull rod (14), the outer edge of the pull rod (14) is fixedly equipped with a disc 1 (16), the top of the disc 1 (16) is fixedly connected to one end of a spring (17), and the other end of the spring (17) is fixedly connected to a disc 2 (18).

2. The ash conveying spiral cylinder of the boiler second and third flue ash hopper according to claim 1 is additionally provided with an inspection hand hole, characterized in that: The outer edge of the scraper (7) fits the inner wall of the cylinder body (1), and the number of the connecting rods (6) is two, and the two connecting rods (6) are symmetrically arranged on both sides of the spiral sheet (5).

3. The ash conveying spiral cylinder of the boiler second and third flue ash hopper according to claim 1 is additionally provided with an inspection hand hole, characterized in that: The second disc (18) is slidably connected to the outer edge of the pull rod (14), and the pull rod (14) is inserted into the middle of the spring (17). The first disc (16), the spring (17) and the second disc (18) are all arranged in the inner cavity of the protective cover (13). A through hole is provided through the top of the protective cover (13), and the pull rod (14) is slidably connected to the inner wall of the through hole. The top of the pull rod (14) is fixedly equipped with a pull plate (15).

4. The ash conveying spiral cylinder of the boiler second and third flue ash hopper according to claim 1 is additionally provided with an inspection hand hole, characterized in that: The inner wall of the connecting block (12) is provided with an insertion hole, and the end of the pull rod (14) away from the pull plate (15) is inserted into the inner wall of the insertion hole.

5. According to claim 1, the ash conveying spiral cylinder of the boiler second and third flue ash hopper is additionally provided with an inspection hand hole, characterized in that: The number of the square holes (19) and the number of the square frames (8) are both six, and the six square holes (19) and the square frames (8) are distributed in parallel at the lower position of the cylinder body (1), and the size of the square hole (19) is 300mm*350mm.

6. The ash conveying spiral cylinder of the boiler second and third flue ash hopper according to claim 1 is additionally provided with an inspection hand hole, characterized in that: A ball bearing is fixedly mounted on the side of the cylinder body (1) away from the fixed disk (2); an end of the rotating rod (4) away from the servo motor (3) is fixedly connected to the inner ring of the ball bearing; and an end of the rotating rod (4) close to the servo motor (3) is rotatably connected to the inner wall of the fixed disk (2).

7. The ash conveying spiral cylinder of the boiler second and third flue ash hopper according to claim 1 is additionally provided with an inspection hand hole, characterized in that: The shape of the slider (10) is adapted to the shape of the inner wall of the slide groove (9) and both are convex-shaped. The top of the sealing door (11) is fitted with the bottom of the frame (8) and is slidably connected.

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