Anti-blocking dredging device for coal bunker of power plant

Abstract

The invention discloses an anti-blocking dredging device for a coal bunker of a power plant, and relates to the technical field of coal bunker anti-blocking dredging. Comprising a coal bunker body, a dredging structure and a cleaning structure are arranged in the coal bunker body, and the dredging structure comprises a movable rod arranged in the coal bunker body. A movable plate and a scraping strip keep still and scrape the inner wall of the rotating coal bunker body in a wall-hanging mode, a high-pressure air pump inputs compressed air into an air inlet cavity and discharges the compressed air from a plurality of exhaust holes, fire coal in the coal bunker body is fully loosened through the high-pressure air, and an air cylinder stretches out and draws back to drive a movable rod to ascend and descend vertically. And meanwhile, when the movable rod ascends and descends up and down, a plurality of large arc discs and small arc discs are driven to move up and down in the coal bunker body, when the large arc discs and the small arc discs buried in fire coal move up and down, an arch structure generated when the fire coal is blocked is damaged, and the anti-blocking and dredging effects of the coal bunker body are further improved.

Description

Technical Field

[0001] The invention relates to the technical field of coal bunker anti-blocking and dredging, and in particular to a coal bunker anti-blocking and dredging device for a power plant. Background Art

[0002] In front of the coal-fired boiler of a thermal power plant, there is usually a raw coal bunker for storing coal. The coal in the raw coal bunker is transported to the boiler for combustion to release the energy in the coal. The coal in the bunker is prone to blockage when being discharged and needs to be cleared using a dredging device.

[0003] An existing automatic cleaning and anti-blocking device for raw coal bunkers in thermal power plants (Announcement No.: CN220501597U) has at least the following disadvantages: although the above-mentioned device transports coal by conveying high-pressure gas through a long conveying shell, and then uses a secondary telescopic rod to retract to scrape the inner wall of the inclined wall, the device has a poor dredging effect when loosening coal with high humidity, and when the secondary telescopic rod drives the long dredging shell to retract to scrape the inner wall of the coal bunker, the long dredging shell is inconsistent in size with the inner wall of the coal bunker, making it difficult to fully scrape off the coal hanging on the wall inside the coal bunker, resulting in poor anti-blocking and dredging effect of the device, and thus the present invention is proposed. Summary of the invention

[0004] The object of the present invention is to provide a device for preventing and dredging coal bunkers in power plants to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a power plant coal bunker anti-blocking and dredging device, comprising a coal bunker body, wherein a dredging structure and a cleaning structure are arranged inside the coal bunker body, the dredging structure comprises a movable rod arranged inside the coal bunker body, a plurality of large arc disks are fixed on the outer circular wall of the movable rod, a plurality of small arc disks are fixed on the outer circular wall of the movable rod, the small arc disks are located below the large arc disks, the small arc disks are located in the discharge port of the coal bunker body, a mounting plate is arranged above the coal bunker body, a cylinder is fixed on the top surface of the mounting plate, the telescopic end of the cylinder passes through the top surface of the mounting plate and is fixed to the top end of the movable rod.

[0006] Preferably, a movable plate is attached to the inner wall surface of the coal bunker body, an air intake cavity is opened inside the movable plate, a high-pressure air pump is connected and fixed to one side of the movable plate, and the high-pressure air pump is located on the outside of the coal bunker body, and a plurality of exhaust holes are opened on the other side of the movable plate, and the plurality of exhaust holes are all located inside the coal bunker body.

[0007] Preferably, the cleaning structure includes a scraper bar fixed on one side of the movable plate, one side of the scraper bar is an inclined surface, an outer tooth ring is fixed to the outer circular wall of the coal bin body, a gear is meshed on one side of the outer tooth ring, and a motor is fixed to the top surface of the gear.

[0008] Preferably, a support shell is provided on the outside of the coal bunker body, a mounting hole is provided on the top surface of the support shell, the coal bunker body and the internal rotation arrangement of the mounting hole, the motor and the high-pressure air pump are both fixed to the top surface of the support shell, the mounting plate is fixed to the top surface of the support shell, and a discharge notch is provided on the outer circular wall surface of the support shell.

[0009] Preferably, a support plate is fixed inside the support shell, a fixing hole is opened on the top surface of the support plate, a bearing is fixed inside the fixing hole, and the bottom end of the coal bunker body is fixed to the inner wall surface of the inner ring of the bearing.

[0010] Preferably, a heating shell is fixed on the inner circular wall of the coal bunker body, an installation cavity is opened inside the heating shell, a plurality of heating rods are fixed inside the installation cavity, the inner circular wall of the heating shell is fitted with the outer circular wall of the coal bunker body, a plurality of air outlet holes are opened on one side of the heating shell, and the air outlet holes are connected with the installation cavity.

[0011] Preferably, a limiting ring is fixed on the outer circumferential wall surface of the coal bunker body, a limiting groove is provided on the inner circumferential wall surface of the mounting hole, and the limiting ring and the inner wall of the limiting groove are slidably arranged.

[0012] Preferably, an observation window is provided on the outer circular wall surface of the support shell, and tempered glass is fixed to the inner wall of the observation window.

[0013] Preferably, a temperature sensor and a humidity sensor are fixed to the inner wall surface of the coal bunker body.

[0014] Preferably, the plurality of exhaust holes are evenly distributed along the height direction of the movable plate, and filters are fixed inside the plurality of exhaust holes.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] A device for preventing and dredging coal bunkers in power plants, with the anti-blocking structure and the cleaning structure, the motor drives the coal bunker body to rotate through the transmission of the gear and the outer gear ring, the movable plate and the scraper bar remain stationary and scrape the inner wall of the rotating coal bunker body, the high-pressure air pump inputs compressed gas into the air intake cavity and discharges it from a plurality of exhaust holes, so that the high-pressure gas fully loosens the burning coal in the coal bunker body, and the cylinder is extended and retracted to drive the movable rod to move up and down;

[0017] At the same time, when the movable rod is raised and lowered, it carries several large arc plates and small arc plates to move up and down in the coal bunker body. When the large arc plates and small arc plates buried in the coal move up and down, they destroy the arch structure produced when the coal is blocked, further improving the anti-blocking and dredging effect of the coal bunker body. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the present invention;

[0019] Figure 2It is a schematic diagram of the split structure of the present invention;

[0020] Figure 3 It is a schematic diagram of the split structure of the mounting plate of the present invention;

[0021] Figure 4 It is a schematic diagram of the split structure of the support shell of the present invention;

[0022] Figure 5 It is a schematic diagram of the split structure of the scraper strip of the present invention;

[0023] Figure 6 It is a schematic diagram of the split structure at the movable plate of the present invention;

[0024] Figure 7 It is a schematic structural diagram of the heating shell of the present invention.

[0025] In the figure: 1. coal bunker body; 2. movable rod; 201. large arc disk; 202. small arc disk; 203. mounting plate; 204. cylinder; 205. movable plate; 206. air intake cavity; 207. high-pressure air pump; 208. exhaust hole; 3. scraper; 301. outer gear ring; 302. gear; 4. support shell; 401. mounting hole; 402. fixing hole; 403. bearing; 404. support plate; 405. discharge notch; 5. heating shell; 501. mounting cavity; 502. heating rod; 503. exhaust hole; 6. limit ring; 601. limit groove; 7. observation window; 701. tempered glass; 8. temperature sensor; 801. humidity sensor; 9. filter. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] like Figure 1-Figure 7 As shown, the present invention provides a technical solution: a coal bunker anti-blocking and dredging device for a power plant, comprising a coal bunker body 1, wherein a dredging structure and a cleaning structure are arranged inside the coal bunker body 1, the dredging structure comprises a movable rod 2 arranged inside the coal bunker body 1, a plurality of large arc disks 201 are fixed to the outer circular wall surface of the movable rod 2, a plurality of small arc disks 202 are fixed to the outer circular wall surface of the movable rod 2, the small arc disks 202 are located below the large arc disks 201, the small arc disks 202 are located in the discharge port of the coal bunker body 1, a mounting plate 203 is arranged above the coal bunker body 1, a cylinder 204 is fixed to the top surface of the mounting plate 203, the telescopic end of the cylinder 204 passes through the top surface of the mounting plate 203 and is fixed to the top end of the movable rod 2.

[0028] In this embodiment, a movable plate 205 is attached to the inner wall surface of the coal bunker body 1, and an air intake cavity 206 is opened inside the movable plate 205. A high-pressure air pump 207 is connected and fixed to one side of the movable plate 205, and the high-pressure air pump 207 is located on the outside of the coal bunker body 1. A plurality of exhaust holes 208 are opened on the other side of the movable plate 205, and the plurality of exhaust holes 208 are all located inside the coal bunker body 1.

[0029] In this embodiment, the cleaning structure includes a scraper bar 3 fixed on one side of the movable plate 205, one side of the scraper bar 3 is an inclined surface, an outer tooth ring 301 is fixed to the outer circumferential wall of the coal bunker body 1, a gear 302 is meshed on one side of the outer tooth ring 301, a motor is fixed to the top surface of the gear 302, through the setting of the anti-blocking structure and the cleaning structure, the staff starts the motor, and the motor drives the coal bunker body 1 to rotate through the transmission of the gear 302 and the outer tooth ring 301. When the coal bunker body 1 rotates, the movable plate 205 and the scraper bar 3 remain stationary and scrape the inner wall of the rotating coal bunker body 1. When the coal bunker body 1 rotates, the internal coal accumulation structure is disturbed under the action of the movable plate 205, so as to perform preliminary dredging, and then the staff The staff starts the high-pressure air pump 207, which inputs compressed gas into the air inlet cavity 206 and discharges it from a plurality of exhaust holes 208. When the high-pressure gas is discharged from the exhaust holes 208, since the coal bunker body 1 is in rotation, the high-pressure gas fully loosens the coal in the coal bunker body 1, thereby improving the anti-blocking and dredging effect. Finally, the staff starts the extension and contraction of the cylinder 204, which drives the movable rod 2 to rise and fall. When the movable rod 2 rises and falls, it carries a plurality of large arc disks 201 and small arc disks 202 to move up and down in the coal bunker body 1. When the large arc disk 201 and the small arc disk 202 buried in the coal move up and down, they destroy the arch structure generated when the coal is blocked, thereby further improving the anti-blocking and dredging effect of the coal bunker body 1.

[0030] In this embodiment, a support shell 4 is provided on the outer side of the coal bunker body 1, and a mounting hole 401 is provided on the top surface of the support shell 4. The coal bunker body 1 and the internal rotation arrangement of the mounting hole 401, the motor and the high-pressure air pump 207 are both fixed to the top surface of the support shell 4, the mounting plate 203 is fixed to the top surface of the support shell 4, and a discharge notch 405 is provided on the outer circular wall surface of the support shell 4. When the coal bunker body 1 is rotating, the support shell 4 protects the coal bunker body 1 and stably installs the motor and the high-pressure air pump 207.

[0031] In this embodiment, a support plate 404 is fixed inside the support shell 4, a fixing hole 402 is opened on the top surface of the support plate 404, a bearing 403 is fixed inside the fixing hole 402, and the bottom end of the coal bunker body 1 is fixed to the inner wall surface of the inner ring of the bearing 403. When the coal bunker body 1 rotates, the support plate 404 stably supports the coal bunker body 1 inside the support shell 4, and at the same time, the bearing 403 makes the rotation of the coal bunker body 1 more stable.

[0032] In this embodiment, a heating shell 5 is fixed to the inner circular wall of the coal bunker body 1, and an installation cavity 501 is opened inside the heating shell 5. A plurality of heating rods 502 are fixed inside the installation cavity 501. The inner circular wall of the heating shell 5 fits the outer circular wall of the coal bunker body 1. A plurality of air outlets 503 are opened on one side of the heating shell 5. The air outlets 503 are connected with the installation cavity 501. The heating shell 5 is made of stainless steel. When the humidity of the coal inside the coal bunker body 1 is high, the staff can start the heating rod 502. The heat emitted by the heating rod 502 heats the coal bunker body 1 through conduction of the heating shell 5, thereby reducing the humidity of the coal near the inner wall of the coal bunker body 1 and reducing the possibility of wall hanging. At the same time, the coal is prevented from adhering to the scraper 3 and the movable plate 205. The air outlet 503 discharges the expanded air in the installation cavity 501 when the heating rod 502 is heated.

[0033] In this embodiment, a limiting ring 6 is fixed on the outer circular wall of the coal bunker body 1, and a limiting groove 601 is provided on the inner circular wall of the mounting hole 401. The limiting ring 6 and the inner wall of the limiting groove 601 are slidingly arranged. When the coal bunker body 1 rotates, the matching arrangement of the limiting ring 6 and the limiting groove 601 can further improve the supporting effect of the coal bunker body 1 and improve the stability of the coal bunker body 1 during rotation.

[0034] In this embodiment, an observation window 7 is provided on the outer circumferential wall of the support shell 4, and a tempered glass 701 is fixed to the inner wall of the observation window 7. The staff can observe the operating status of the gear 302 and the outer gear ring 301 through the observation window 7, so that the staff can perform timely maintenance on them.

[0035] In this embodiment, a temperature sensor 8 and a humidity sensor 801 are fixed to the inner wall of the coal bunker body 1. The temperature sensor 8 and the humidity sensor 801 can facilitate the staff to monitor the storage status inside the coal bunker body 1 to ensure the safety of coal storage.

[0036] In this embodiment, the plurality of exhaust holes 208 are evenly distributed along the height direction of the movable plate 205 , and filter screens 9 are fixed inside the plurality of exhaust holes 208 , and the filter screens 9 can prevent the burning coal from entering the exhaust holes 208 .

[0037] Working principle: During use, the staff starts the motor, and the motor drives the coal bunker body 1 to rotate through the transmission of the gear 302 and the outer gear ring 301. When the coal bunker body 1 rotates, the movable plate 205 and the scraper 3 remain stationary and scrape the inner wall of the rotating coal bunker body 1. When the coal bunker body 1 rotates, the internal coal accumulation structure is disturbed under the action of the movable plate 205, so as to perform preliminary dredging. Then the staff starts the high-pressure air pump 207, and the high-pressure air pump 207 inputs compressed gas into the air inlet cavity 206 and discharges it from a plurality of exhaust holes 208. The high-pressure gas is discharged from the exhaust holes 20 During the discharge, since the coal bunker body 1 is in rotation, the high-pressure gas fully loosens the coal in the coal bunker body 1, thereby improving the anti-blocking and unblocking effect. Finally, the staff starts the extension and contraction of the cylinder 204, which drives the movable rod 2 to move up and down. When the movable rod 2 moves up and down, it brings a number of large arc disks 201 and small arc disks 202 to move up and down in the coal bunker body 1. When the large arc disks 201 and small arc disks 202 buried in the coal move up and down, they destroy the arched structure generated when the coal is blocked, thereby further improving the anti-blocking and unblocking effect of the coal bunker body 1. When the coal bunker body 1 is rotating, the support The shell 4 protects the coal bunker body 1 and stably installs the motor and the high-pressure air pump 207. When the coal bunker body 1 rotates, the support plate 404 stably supports the coal bunker body 1 inside the support shell 4, and the bearing 403 makes the rotation of the coal bunker body 1 more stable. When the humidity of the coal inside the coal bunker body 1 is high, the staff can start the heating rod 502. The heat emitted by the heating rod 502 heats the coal bunker body 1 through the conduction of the heating shell 5, so that the humidity of the coal near the inner wall of the coal bunker body 1 is reduced, the possibility of hanging on the wall is reduced, and the coal is prevented from adhering to the scraper 3 and the movable On the plate 205, the air outlet 503 discharges the expanded air in the installation cavity 501 when the heating rod 502 is heated. When the coal bunker body 1 rotates, the matching arrangement of the limit ring 6 and the limit groove 601 can further improve the supporting effect of the coal bunker body 1 and improve the stability of the coal bunker body 1 when it rotates. The staff can observe the operating status of the gear 302 and the outer gear ring 301 through the observation window 7, which is convenient for the staff to carry out timely maintenance. The temperature sensor 8 and the humidity sensor 801 can facilitate the staff to monitor the internal storage status of the coal bunker body 1 to ensure the safety of coal storage.

[0038] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is limited by the attached embodiments and their equivalents.

Claims

1. A device for preventing and dredging coal bunkers in power plants, comprising a coal bunker body (1), characterized in that: The coal bunker body (1) is provided with a dredging structure and a cleaning structure inside. The dredging structure comprises a movable rod (2) arranged inside the coal bunker body (1). A plurality of large arc disks (201) are fixed on the outer circular wall of the movable rod (2). A plurality of small arc disks (202) are fixed on the outer circular wall of the movable rod (2). The small arc disks (202) are located below the large arc disks (201). The small arc disks (202) are located in the discharge port of the coal bunker body (1). A mounting plate (203) is provided above the coal bunker body (1). A cylinder (204) is fixed on the top surface of the mounting plate (203). The telescopic end of the cylinder (204) passes through the top surface of the mounting plate (203) and is fixed to the top end of the movable rod (2).

2. The anti-blocking and dredging device for coal bunker in a power plant according to claim 1 is characterized by: The inner wall surface of the coal bunker body (1) is fitted with a movable plate (205), an air intake cavity (206) is provided inside the movable plate (205), one side of the movable plate (205) is connected and fixed with a high-pressure air pump (207), the high-pressure air pump (207) is located outside the coal bunker body (1), and the other side of the movable plate (205) is provided with a plurality of exhaust holes (208), all of which are located inside the coal bunker body (1).

3. The anti-blocking and dredging device for coal bunker in a power plant according to claim 2 is characterized by: The cleaning structure comprises a scraper bar (3) fixed on one side of the movable plate (205), one side of the scraper bar (3) is an inclined surface, an outer toothed ring (301) is fixed on the outer circular wall surface of the coal bunker body (1), a gear (302) is meshed on one side of the outer toothed ring (301), and a motor is fixed on the top surface of the gear (302).

4. The anti-blocking and dredging device for coal bunker in a power plant according to claim 3 is characterized by: A support shell (4) is arranged on the outer side of the coal bunker body (1), a mounting hole (401) is provided on the top surface of the support shell (4), the coal bunker body (1) and the internal rotation arrangement of the mounting hole (401), the motor and the high-pressure air pump (207) are both fixed to the top surface of the support shell (4), the mounting plate (203) is fixed to the top surface of the support shell (4), and a discharge notch (405) is provided on the outer circular wall surface of the support shell (4).

5. The anti-blocking and dredging device for coal bunker in a power plant according to claim 4 is characterized by: A support plate (404) is fixed inside the support shell (4), a fixing hole (402) is opened on the top surface of the support plate (404), a bearing (403) is fixed inside the fixing hole (402), and the bottom end of the coal bunker body (1) is fixed to the inner wall surface of the inner ring of the bearing (403).

6. The anti-blocking and dredging device for coal bunker in a power plant according to claim 5 is characterized by: A heating shell (5) is fixed on the inner circular wall surface of the coal bunker body (1), an installation cavity (501) is provided inside the heating shell (5), a plurality of heating rods (502) are fixed inside the installation cavity (501), the inner circular wall surface of the heating shell (5) is in contact with the outer circular wall surface of the coal bunker body (1), a plurality of air outlet holes (503) are provided on one side of the heating shell (5), and the air outlet holes (503) are connected with the installation cavity (501).

7. The device for preventing and dredging coal bunker in a power plant according to claim 6 is characterized by: A limiting ring (6) is fixed on the outer circular wall surface of the coal bunker body (1), a limiting groove (601) is provided on the inner circular wall surface of the mounting hole (401), and the limiting ring (6) and the inner wall of the limiting groove (601) are slidably arranged.

8. The device for preventing and dredging coal bunker in a power plant according to claim 7 is characterized by: An observation window (7) is provided on the outer circular wall surface of the support shell (4), and tempered glass (701) is fixed to the inner wall of the observation window (7).

9. The anti-blocking and dredging device for coal bunker in a power plant according to claim 8, characterized in that: A temperature sensor (8) and a humidity sensor (801) are fixed to the inner wall surface of the coal bunker body (1).

10. The anti-blocking and dredging device for coal bunker in a power plant according to claim 9, characterized in that: The plurality of exhaust holes (208) are evenly distributed along the height direction of the movable plate (205), and filter screens (9) are fixed inside the plurality of exhaust holes (208).

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