Coal dropping device of circulating fluidized bed boiler

Abstract

The utility model discloses a circulating fluidized bed boiler coal dropping device, and relates to the field of boiler coal dropping devices, the bottom of a nut head is fixed with a screw, the bottom of the screw is provided with a screw cylinder, the bottom of the screw cylinder is fixed with a fixed plate, the outer side of the screw cylinder is provided with an asbestos ring, the outer side of the asbestos ring is provided with a cylinder, and the cylinder is provided with a screw rod. A sliding groove is formed in the inner wall of the cylinder, a first sliding block is fixed to the outer side of the screw cylinder, the first sliding block is slidably connected to the interior of the sliding groove, a sliding column is slidably connected to the middle of the interior of the nut head, a second sliding block is fixed to the outer side of the sliding column, and the sliding column penetrates through the interior of the screw rod; the fixing plate is driven to move upwards through the arranged screw cylinder, the fixing plate abuts against the bottom of the first fixing ring so as to be fixed, and through the arranged cylinder and the asbestos ring, the situation that the fastening force of the bolt and the screw hole is lost due to the high temperature influence is prevented.

Description

Technical Field

[0001] The utility model relates to the field of coal dropping devices for circulating fluidized bed boilers, in particular to a coal dropping device for circulating fluidized bed boilers. Background Art

[0002] The coal drop pipe is a coal transport pipeline that prevents excessive dust from being generated during the falling process of coal flow and plays a role in diversion or diversion during the falling process. It is mainly used in coal, ports, thermal power, coal dump stations, coal washing plants, coal-fired industrial boilers, etc.

[0003] The existing patent CN211667848U discloses a boiler coal dropping device, which fixes asbestos in the gap between the short tube and the coal dropping pipe. There is a gap between the annular pressure block and the short tube, and the gap also plays a role of expansion and contraction. In this way, the coal dropping pipe can expand and contract freely when heated. The fourth flange is fixedly arranged at the upper end of the coal dropping pipe, and the third flange and the fourth flange are connected by bolts.

[0004] The existing device is filled with asbestos when it is expanding and contracting. When the asbestos is expanded and contracted, it is affected by wind pressure, cavity, thermal stress, etc., which will accelerate its aging process. The influence of high temperature environment will cause the bolts to lose their tightening force, posing a potential danger to the safety of engineering equipment. Utility Model Content

[0005] The purpose of the utility model is to provide a circulating fluidized bed boiler coal dropping device in order to solve the problem that when asbestos is expanded and retracted, it is affected by wind pressure, cavity, thermal stress, etc., which will accelerate its aging process, and the influence of high temperature environment will cause the bolts to lose their tightening force, posing a potential danger to the safety of engineering equipment.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a circulating fluidized bed boiler coal dropping device, a No. 1 fixing ring is fixed to the bottom of the outer side of the coal dropping port, a plurality of groups of circular holes are arranged on the surface of the No. 1 fixing ring, a plurality of groups of fixing components are arranged inside the No. 1 fixing ring, the fixing component is provided with a nut head, a screw is fixed to the bottom of the nut head, a screw barrel is in contact with the screw, and the nut head is rotated, the nut head drives the screw to rotate, a screw barrel is provided at the bottom of the screw, a fixing plate is fixed to the bottom of the screw barrel, the rotation of the screw drives the screw barrel to move upward, the screw barrel drives the fixing plate to move upward, and an asbestos ring is provided on the outside of the screw barrel.

[0007] As a further solution of the utility model: a cylinder is arranged on the outer side of the asbestos ring, a slide groove is arranged on the inner wall of the cylinder, a slider No. 1 is fixed on the outer side of the screw barrel, and the slider No. 1 is slidably connected to the inside of the slide groove.

[0008] As a further solution of the utility model: a sliding column is slidably connected to the middle part of the nut head, and a second sliding block is fixed to the outside of the sliding column. The sliding column runs through the inside of the screw, and the inner walls of the screw and the screw barrel are both provided with grooves. The fixing plate supports the bottom of the No. 1 fixing ring for fixing. The sliding column is pressed downward, and the sliding column drives the sliding block to be clamped in the groove in the screw of the screw barrel for fixing.

[0009] As a further solution of the utility model: a short tube is arranged at the bottom of the coal drop port, a No. 1 fixing ring is arranged at the top of the outer side of the short tube, and a wedge-shaped tube is arranged at the bottom of the short tube.

[0010] As a further solution of the utility model: a coal dropping pipe is arranged on the outer side of the wedge-shaped pipe, and a second fixing ring is fixed on the top of the outer side of the coal dropping pipe.

[0011] As a further solution of the utility model: a pressure block is arranged on the top of the second fixing ring, and the wedge-shaped tube at the bottom of the tube will also expand. By adjusting the distance between the pressure block and the wedge-shaped asbestos ring, a circular ring is fixed on the inner wall of the coal drop tube.

[0012] As a further solution of the utility model: a wedge-shaped asbestos ring is arranged on the top of the circular ring, so that the entire wedge-shaped asbestos ring moves upward to the bottom of the pressing block to contact it, thereby reducing the extrusion, and the inner wall of the wedge-shaped asbestos ring contacts the outer side of the wedge-shaped tube.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1. Through the wedge-shaped tube, when the wedge-shaped tube expands, the wedge-shaped asbestos ring is squeezed, so that the whole wedge-shaped asbestos ring moves upward and moves to the bottom of the pressing block to contact it, thereby reducing the squeezing. The circular ring is used to prevent the wedge-shaped asbestos ring from wind pressure, cavity, thermal stress, etc.

[0015] 2. The fixed plate is driven upward by the screw barrel so that it can be pressed against the bottom of the No. 1 fixing ring for fixation. The cylinder and asbestos ring are provided to prevent the bolts and screw holes from losing their fastening force due to high temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the short tube structure of the utility model;

[0018] Figure 3 This is a schematic diagram of the wedge-shaped asbestos ring structure of the utility model;

[0019] Figure 4 This is a schematic diagram of the structure of the coal drop pipe of the utility model;

[0020] Figure 5 It is a schematic diagram of the structure of the fixing component of the utility model.

[0021] In the figure: 1. coal drop port; 101. No. 1 fixing ring; 2. fixing assembly; 201. nut head; 202. cylinder; 203. screw; 204. screw barrel; 205. asbestos ring; 206. fixing plate; 207. slide groove; 208. No. 1 slider; 209. slide column; 210. No. 2 slider; 3. short tube; 301. wedge-shaped tube; 4. coal drop pipe; 401. No. 2 fixing ring; 402. pressure block; 403. ring; 5. wedge-shaped asbestos ring. 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 in 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 , 5 In an embodiment of the utility model, a coal dropping device for a circulating fluidized bed boiler includes a coal dropping port 1, a No. 1 fixing ring 101 is fixed to the bottom of the outer side of the coal dropping port 1, a plurality of groups of round holes are arranged on the surface of the No. 1 fixing ring 101, a plurality of groups of fixing components 2 are arranged inside the No. 1 fixing ring 101, the fixing component 2 is provided with a nut head 201, a screw 203 is fixed to the bottom of the nut head 201, a screw barrel 204 is in contact with the screw 203, the nut head 201 is rotated, the nut head 201 drives the screw 203 to rotate, a screw barrel 204 is arranged at the bottom of the screw 203, a fixing plate 206 is fixed to the bottom of the screw barrel 204, the rotation of the screw 203 drives the screw 203 to rotate the screw barrel 204 to move upward, and the screw barrel 204 drives the fixing plate 206 to move upward An asbestos ring 205 is provided on the outside of the screw barrel 204, a cylinder 202 is provided on the outside of the asbestos ring 205, a slide groove 207 is provided on the inner wall of the cylinder 202, a slider 208 is fixed on the outside of the screw barrel 204, the slider 208 is slidably connected to the inside of the slide groove 207, a slide column 209 is slidably connected to the middle part of the nut head 201, a slider 210 is fixed on the outside of the slide column 209, the slide column 209 runs through the inside of the screw rod 203, and the inner walls of the screw rod 203 and the screw barrel 204 are both provided with a card groove, the fixing plate 206 supports the bottom of the No. 1 fixing ring 101 for fixing, and the slide column 209 is pressed downward, and the slide column 209 drives the slider 210 to be clamped in the card groove in the screw rod 203 of the screw barrel 204 for fixing.

[0024] In this embodiment: the screw barrel 204 is in contact with the screw rod 203, and the nut head 201 is rotated, the nut head 201 drives the screw rod 203 to rotate, and the rotation of the screw rod 203 drives the screw 203 to rotate the screw barrel 204 to move upward, and the screw barrel 204 drives the fixing plate 206 to move upward, so that the fixing plate 206 supports the bottom of the No. 1 fixing ring 101 to fix it, and presses the sliding column 209 downward, and the sliding column 209 drives the sliding block 210 to engage in the slot in the screw barrel 204 and the screw rod 203 for fixing.

[0025] Please refer to Figure 2 , 3 4. A short tube 3 is provided at the bottom of the coal drop port 1. A No. 1 fixing ring 101 is provided at the top of the outer side of the short tube 3. A wedge-shaped tube 301 is provided at the bottom of the short tube 3. A coal drop pipe 4 is provided at the outer side of the wedge-shaped tube 301. A No. 2 fixing ring 401 is fixed at the top of the outer side of the coal drop pipe 4. A pressure block 402 is provided at the top of the No. 2 fixing ring 401. The wedge-shaped tube 301 at the bottom of the tube 3 will also expand. By adjusting the distance between the pressure block 402 and the wedge-shaped asbestos ring 5, a circular ring 403 is fixed to the inner wall of the coal drop pipe 4. A wedge-shaped asbestos ring 5 is provided on the top of the circular ring 403, so that the wedge-shaped asbestos ring 5 moves upward as a whole and moves to the bottom of the pressure block 402 to contact it, thereby reducing the extrusion. The inner wall of the wedge-shaped asbestos ring 5 contacts the outer side of the wedge-shaped tube 301.

[0026] In this embodiment, the wedge-shaped tube 301 at the bottom of the short tube 3 will also expand. By adjusting the distance between the pressing block 402 and the wedge-shaped asbestos ring 5, the wedge-shaped asbestos ring 5 is squeezed when the wedge-shaped tube 301 expands, so that the entire wedge-shaped asbestos ring 5 moves upward and moves to the bottom of the pressing block 402 to contact it, thereby reducing the squeezing.

[0027] Working principle: When the short tube 3 expands, the wedge-shaped tube 301 at the bottom of the short tube 3 will also expand. By adjusting the distance between the pressing block 402 and the wedge-shaped asbestos ring 5, the wedge-shaped asbestos ring 5 is squeezed when the wedge-shaped tube 301 expands, so that the wedge-shaped asbestos ring 5 moves upward as a whole and moves to the bottom of the pressing block 402 to contact it, thereby reducing the squeezing. The circular ring 403 is provided to prevent the wedge-shaped asbestos ring 5 from being subjected to wind pressure, cavity, thermal stress, etc.;

[0028] The cylinder 202 is clamped into the round hole of the No. 1 fixing ring 101, the screw barrel 204 is in contact with the screw rod 203, and the nut head 201 is rotated. The nut head 201 drives the screw rod 203 to rotate. The rotation of the screw rod 203 drives the screw 203 to rotate the screw barrel 204 to move upward. The screw barrel 204 drives the fixing plate 206 to move upward, so that the fixing plate 206 supports the bottom of the No. 1 fixing ring 101 for fixing. The sliding column 209 is pressed downward. The sliding column 209 drives the slider 210 to clamp into the groove in the screw barrel 204 and the screw rod 203 for fixing. The cylinder 202 and the asbestos ring 205 are set to prevent the bolts and the screw holes from losing their fastening force due to high temperature.

[0029] What is described above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A circulating fluidized bed boiler coal dropping device, comprising a coal dropping port (1), characterized in that: A first fixing ring (101) is fixed to the bottom of the outer side of the coal drop port (1), a plurality of groups of circular holes are arranged on the surface of the first fixing ring (101), and a plurality of groups of fixing components (2) are arranged inside the first fixing ring (101); The fixing assembly (2) comprises a nut head (201), a cylinder (202), a screw rod (203), a screw barrel (204), an asbestos ring (205), a fixing plate (206), a slide groove (207), a first slide block (208), a slide column (209), and a second slide block (210); A screw rod (203) is fixed at the bottom of the nut head (201), a screw barrel (204) is arranged at the bottom of the screw rod (203), a fixing plate (206) is fixed at the bottom of the screw barrel (204), and an asbestos ring (205) is arranged on the outer side of the screw barrel (204).

2. The circulating fluidized bed boiler coal dropping device according to claim 1, characterized in that: A cylinder (202) is arranged on the outer side of the asbestos ring (205), a slide groove (207) is arranged on the inner wall of the cylinder (202), a first slide block (208) is fixed on the outer side of the screw barrel (204), and the first slide block (208) is slidably connected to the inside of the slide groove (207).

3. The coal dropping device for a circulating fluidized bed boiler according to claim 1, characterized in that: A sliding column (209) is slidably connected to the middle of the nut head (201), a second sliding block (210) is fixed to the outside of the sliding column (209), the sliding column (209) passes through the inside of the screw rod (203), and the inner walls of the screw rod (203) and the screw barrel (204) are both provided with grooves.

4. The circulating fluidized bed boiler coal dropping device according to claim 1, characterized in that: A short tube (3) is provided at the bottom of the coal drop port (1), a No. 1 fixing ring (101) is provided at the top of the outer side of the short tube (3), and a wedge-shaped tube (301) is provided at the bottom of the short tube (3).

5. The coal dropping device for a circulating fluidized bed boiler according to claim 4, characterized in that: A coal dropping pipe (4) is arranged on the outer side of the wedge-shaped pipe (301), and a second fixing ring (401) is fixed on the top of the outer side of the coal dropping pipe (4).

6. The coal dropping device for a circulating fluidized bed boiler according to claim 5, characterized in that: A pressing block (402) is arranged on the top of the second fixing ring (401), and a circular ring (403) is fixed on the inner wall of the coal dropping pipe (4).

7. The coal dropping device for a circulating fluidized bed boiler according to claim 6, characterized in that: A wedge-shaped asbestos ring (5) is arranged on the top of the circular ring (403), and the inner wall of the wedge-shaped asbestos ring (5) is in contact with the outer side of the wedge-shaped tube (301).

Images