A combined device for ash hopper level gauges in an electrostatic precipitator of a thermal power plant

Abstract

The present invention discloses a combined device for ash hopper level gauges in a thermal power plant, which relates to the technical field of ash hopper level gauges and includes an ash hopper: a lower ash outlet is fixedly connected to the lower end surface of the ash hopper, and a reciprocating threaded groove rod is rotatably connected to the upper part of the inner cavity of the ash hopper. A sliding sleeve is fixedly connected to the middle part of the outer side wall of the reciprocating threaded groove rod; a level detection component is arranged on the right side of the outer side wall of the ash hopper; a driving component is arranged on the front part of the outer side wall of the ash hopper; a loosening mechanism is arranged in the lower part of the inner cavity of the ash hopper; a vibration knocking mechanism is arranged in the upper part of the inner cavity of the ash hopper. In the present invention, through the cooperation of the loosening mechanism and the vibration knocking mechanism, etc., the generation of caking of the ash material in the ash hopper is effectively avoided, ensuring the normal use of the level detection component. Through the setting of the level detection component, etc., the whole device realizes the function of monitoring the ash material level in the ash hopper.

Description

Technical Field

[0001] The present invention relates to the technical field of hopper level gauges, and particularly to a combined device for a hopper level gauge of an electrostatic precipitator in a thermal power plant. Background Art

[0002] As a storage device for collecting dust by an electrostatic precipitator in a thermal power plant, generally at least one level gauge needs to be designed and installed at a certain height position to detect the level height in the hopper, and corresponding ash conveying system operation modes are adopted to avoid accidents caused by excessive long-term ash level in the hopper leading to pressure on the hopper and then hopper collapse. Generally speaking, it is all realized by using fly ash in the hopper as the measuring medium.

[0003] Currently, the existing hopper level gauges generally use fly ash in the hopper as the measuring medium for measurement, and there are generally disadvantages such as inaccurate measurement, poor equipment reliability, and high installation position, which are inconvenient for inspection and maintenance. In addition, due to the current ultra-low emission transformation, low-low temperature economizer transformation and other technical transformations in thermal power plants, problems such as the coal burned deviating seriously from the designed coal type, the overhaul of ash conveying equipment, etc. have led to problems such as the decrease in the temperature of fly ash in the hopper, the deterioration of fluidity, and the easy ash bridging in the hopper, which also affect the accurate measurement of the hopper level to a certain extent. Therefore, this application proposes a combined device for a hopper level gauge of an electrostatic precipitator in a thermal power plant to solve such problems. Summary of the Invention

[0004] The purpose of the present invention is to solve the disadvantages existing in the prior art, and to propose a combined device for a hopper level gauge of an electrostatic precipitator in a thermal power plant.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A combined device for a hopper level gauge of an electrostatic precipitator in a thermal power plant, including a hopper:

[0007] The lower end surface of the hopper is fixedly connected with a ash discharge port, and the upper part of the inner cavity of the hopper is rotatably connected with a reciprocating threaded groove rod, and the middle part of the outer side wall of the reciprocating threaded groove rod is fixedly connected with a sliding sleeve;

[0008] A level detection component, a level detection component is arranged on the right side of the outer side wall of the hopper, and the level detection component is used to detect the height of the ash material in the hopper;

[0009] A driving component, a driving component is arranged on the front part of the outer side wall of the hopper;

[0010] A loosening mechanism, a loosening mechanism is arranged in the lower part of the inner cavity of the hopper, and the loosening mechanism is used to loosen the ash material in the hopper;

[0011] A rapping mechanism is provided at the upper part of the inner cavity of the ash hopper, and the rapping mechanism is used to impact the side wall of the ash hopper to accelerate the discharge of ash.

[0012] Preferably, the material level detection assembly includes a lower inclined tube, an upper inclined tube, a vertical tube, an electric contact remote air gauge and a pneumatic valve. The upper inclined tube is fixedly connected to the upper portion of the outer wall of the ash hopper, and the lower inclined tube is fixedly connected to the lower portion of the outer wall of the ash hopper. Both the lower inclined tube and the upper inclined tube are connected to the vertical tube. A manual valve is provided at the lower portion of the outer wall of the vertical tube, and the manual valve is installed 1.4 meters from the ground.

[0013] Preferably, pneumatic valves are provided on both the lower inclined tube and the upper inclined tube, and the pneumatic valve model is D671X remote-controlled pneumatic butterfly valve. An electric contact remote facsimile air conditioner is installed on the outer wall of the vertical tube 1.5 meters close to the ground. The electric contact remote facsimile air conditioner is connected to the remote terminal through a connecting line. The upper inclined tube has a hole at a corresponding height when the ash hopper is 50%-60% of the volume, and the lower inclined tube has a hole at a corresponding height when the ash hopper is 15%-20% of the volume. The lower end of the vertical tube is about 1.0 meter from the ground.

[0014] Preferably, the driving assembly includes a driving shaft, a driving motor, a first pulley, a second pulley and a belt. The first pulley is rotatably connected to the ash hopper 1 through the driving shaft, the front end face of the reciprocating threaded groove rod is fixedly connected to the second pulley, a belt is transmission-connected between the first pulley and the second pulley, the front end face of the ash hopper is fixedly connected to the driving motor through a frame, and the output shaft end of the driving motor is fixedly connected to the driving shaft.

[0015] Preferably, a groove column is slidably connected in the thread groove wall of the reciprocating thread groove rod, the groove column is fixed to the inner wall of the sliding sleeve, the left and right sides of the outer wall of the sliding sleeve are fixedly connected with racks, and the lower part of the outer wall of the sliding sleeve is fixedly connected with a telescopic rod.

[0016] Preferably, the loosening mechanism includes a limit frame, a limit column, a sliding frame and a loosening plate. The lower end face of the telescopic rod is fixedly connected to the sliding frame, the inner cavity of the sliding frame is fixedly connected to the limit column, the lower part of the inner cavity of the ash hopper is fixedly connected to the limit frame, the limit column slides in the inner cavity of the limit frame, and the left and right end faces of the sliding frame are fixedly connected to the loosening plate.

[0017] Preferably, the rapping mechanism includes a fixed plate, a rotating rod, a gear and a protrusion. A fixed plate is fixedly connected to the front and rear inner walls of the ash hopper, a rotating rod is rotatably connected to the inner cavity of the fixed plate, a gear is fixedly connected to the middle of the outer wall of the rotating rod, and protrusions are fixedly connected to the left and right sides of the outer wall of the rotating rod, and the gear is meshingly connected to the rack.

[0018] Preferably, both the rapping mechanism and the loosening mechanism should be arranged at a position between 1 meter and 2 meters above the ash discharge opening of the ash hopper, and the lowest end of the loosening plate is more than 0.5 meters away from the ash discharge opening.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0020] 1. In the present invention, through the corresponding heights of the upper inclined pipe openings at 50%-60% of the volume of the ash hopper and the lower inclined pipe openings at 15%-20% of the volume of the ash hopper, sufficient time is reserved for handling defects or abnormalities after the alarm is issued, avoiding the risk of ash hopper collapse due to excessive ash storage in the ash hopper and too long ash loading time. Under normal circumstances, due to the mutual connection between the ash hopper space and the vertical pipe, the negative pressure in the ash hopper can be truly reflected by the electric contact remote transmission vacuum gauge on the vertical pipe. When the negative pressure is within the normal vacuum range, the circuit in the electric contact remote transmission vacuum gauge control system is in an open state. When the ash conveying system fails and cannot be eliminated for a long time, the ash level in the ash hopper gradually rises. When the ash level rises to the position of the through hole on the side wall of the ash hopper, the pressure value in the vertical pipe changes. When it reaches the predetermined value of the electric contact remote transmission vacuum gauge, at this time, the circuit in the electric contact remote transmission vacuum gauge control system is connected, an alarm signal is issued, and it is fed back to the DCS to achieve the purpose of material level alarm. By setting the through hole opening upward, it can effectively prevent the extension pipe from being blocked by coal ash, affecting the normal operation of the electric contact remote transmission vacuum gauge.

[0021] 2. In the present invention, when the driving motor is started, the driving shaft drives the first pulley to rotate. Through the cooperation of the belt, the second pulley rotates, and thus the reciprocating threaded groove rod will rotate. By changing the transmission ratio between the first pulley and the second pulley, the speed regulation of the reciprocating threaded groove rod can be completed, enabling it to achieve better effects in use. When the reciprocating threaded groove rod rotates, the sliding sleeve can move back and forth on the reciprocating threaded groove rod, and thus the sliding frame will drive the loosening plate to move back and forth in the ash hopper, loosening the ash material, avoiding its condensation and causing local voids, which affects the normal use of the material level detection component. When the sliding sleeve is about to move to one side of the ash hopper on the reciprocating threaded groove rod, at this time, the rack will drive the gear to rotate. Since the convex block and the gear are both fixedly connected to the rotating rod, the convex block will rotate and impact the side wall of the ash hopper. At this time, the sliding sleeve moves to the end of the reciprocating threaded groove rod. The reciprocating threaded groove rod continues to rotate, and the sliding sleeve will move to the other end of the reciprocating threaded groove rod. Furthermore, the whole device realizes the function of indirectly rapping the side wall of the ash hopper, further avoiding the generation of ash caking and improving the practicability of the whole device. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a front view overall structural schematic diagram of a combined device for the ash hopper level gauge of an electrostatic precipitator in a thermal power plant proposed by the present invention;

[0023] Figure 2Schematic cross-sectional structure diagram of the connection between the material level detection component and the ash hopper of a combined equipment for ash hopper material level gauges in a thermal power plant proposed by the present invention;

[0024] Figure 3 Top view overall structure schematic diagram of a combined equipment for ash hopper material level gauges in a thermal power plant proposed by the present invention;

[0025] Figure 4 A combined equipment for ash hopper material level gauges in a thermal power plant proposed by the present invention Figure 3 Enlarged structure schematic diagram of area A therein;

[0026] Figure 5 A combined equipment for ash hopper material level gauges in a thermal power plant proposed by the present invention Figure 3 Enlarged structure schematic diagram of area B therein;

[0027] Figure 6 Cross-sectional structure schematic diagram of the ash hopper of a combined equipment for ash hopper material level gauges in a thermal power plant proposed by the present invention.

[0028] In the figure: 1. Ash hopper; 2. Ash discharge port; 3. Reciprocating threaded groove rod; 31. Grooved column; 4. Sliding sleeve; 41. Rack; 42. Telescopic rod; 5. Material level detection component; 51. Lower inclined pipe; 52. Upper inclined pipe; 53. Vertical pipe; 54. Electric contact remote transmission vacuum gauge; 541. Connecting wire; 55. Pneumatic valve; 6. Driving component; 61. Driving shaft; 62. Driving motor; 63. First pulley; 64. Second pulley; 65. Belt; 7. Loosening mechanism; 71. Limiting frame; 72. Limiting column; 73. Sliding frame; 74. Loosening plate; 8. Vibration knocking mechanism; 81. Fixed plate; 82. Rotating rod; 83. Gear; 84. Convex block. Detailed implementation manners

[0029] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0030] Referring to Figures 1-6 , a combined equipment for ash hopper material level gauges in a thermal power plant includes an ash hopper:

[0031] The lower end face of the ash hopper 1 is fixedly connected with an ash discharge port 2, and the upper part of the inner cavity of the ash hopper 1 is rotatably connected with a reciprocating threaded groove rod 3. The middle part of the outer side wall of the reciprocating threaded groove rod 3 is fixedly connected with a sliding sleeve 4;

[0032] A material level detection component 5 is arranged on the right side of the outer side wall of the ash hopper 1, and the material level detection component 5 is used to detect the height of the ash material in the ash hopper;

[0033] The driving component 6 is arranged at the front part of the outer wall of the ash hopper 1;

[0034] The loosening mechanism 7 is arranged at the lower part of the inner cavity of the ash hopper 1. The loosening mechanism 7 is used for loosening the ash material in the ash hopper 1;

[0035] The vibration mechanism 8 is arranged at the upper part of the inner cavity of the ash hopper 1. The vibration mechanism 8 is used for impacting the side wall of the ash hopper to accelerate the discharge of the ash material

[0036] Refer to Figure 1 、 2 , wherein, the material level detection component 5 includes a lower inclined pipe 51, an upper inclined pipe 52, a vertical pipe 53, an electric contact remote transmission vacuum gauge 54 and a pneumatic valve 55. The upper inclined pipe 52 is fixedly connected to the upper part of the outer wall of the ash hopper 1, and the lower inclined pipe 51 is fixedly connected to the lower part of the outer wall of the ash hopper 1. Both the lower inclined pipe 51 and the upper inclined pipe 52 are communicated with the vertical pipe 53. A manual valve is arranged at the lower part of the outer wall of the vertical pipe 53, and the manual valve is installed at a height of 1.4 meters from the ground. Pneumatic valves 55 are arranged on both the lower inclined pipe 51 and the upper inclined pipe 52. The model of the pneumatic valve 55 is D671X remote control pneumatic butterfly valve. The electric contact remote transmission vacuum gauge 54 is installed at a position 1.5 meters from the ground on the outer wall of the vertical pipe 53. The electric contact remote transmission vacuum gauge 54 is connected to the remote terminal through a connecting wire 541. The opening of the upper inclined pipe 52 is at the corresponding height when the ash hopper is at 50%-60% of its volume, and the opening of the lower inclined pipe 51 is at the corresponding height when the ash hopper is at 15%-20% of its volume. The bottom end of the vertical pipe 53 is about 1.0 meter from the ground;

[0037] Through the corresponding height of the opening of the upper inclined pipe 52 when the ash hopper is at 50%-60% of its volume and the corresponding height of the opening of the lower inclined pipe 51 when the ash hopper is at 15%-20% of its volume, sufficient time is left for handling defects or abnormalities after the alarm is issued, avoiding the risk of ash hopper collapse due to excessive ash storage in the ash hopper and too long ash hopper bearing time. Under normal circumstances, due to the mutual connection between the space of the ash hopper 1 and the vertical pipe 53, the negative pressure in the ash hopper 1 can be truly reflected by the electric contact remote transmission vacuum gauge 54 on the vertical pipe 53. When the negative pressure is within the normal vacuum range, the circuit in the electric contact remote transmission vacuum gauge control system is in an open state. When the ash conveying system fails and cannot be eliminated for a long time, the ash level in the ash hopper 1 gradually rises. When the ash level rises to the position of the through hole on the side wall of the ash hopper, the pressure value in the vertical pipe 53 changes. When it reaches the preset value of the electric contact remote transmission vacuum gauge 54, at this time, the circuit in the electric contact remote transmission vacuum gauge control system is connected, an alarm signal is issued, and it is fed back to the DCS to achieve the purpose of material level alarm. By setting the through hole opening upward, it can effectively prevent the extension pipe from being blocked by coal ash, affecting the normal operation of the electric contact remote transmission vacuum gauge 54. A manual valve is arranged on the vertical pipe. By opening the lower manual valve, the negative pressure in the ash hopper can be checked on site. When fly ash enters the vertical pipe 53 under special circumstances, it can be dredged by opening the manual valve. If necessary, the pipe can be dredged by blowing compressed air into the vertical pipe 53.

[0038] Reference Figures 1-4 , wherein the driving assembly 6 includes a driving shaft 61, a driving motor 62, a first pulley 63, a second pulley 64 and a belt 65, the first pulley 63 is rotationally connected to the ash hopper 1 through the driving shaft 61, the front end surface of the reciprocating thread groove rod 3 is fixedly connected to the second pulley 64, the first pulley 63 and the second pulley 64 are transmission-connected by a belt 65, the front end surface of the ash hopper is fixedly connected to the driving motor 62 through the frame, and the output shaft end of the driving motor 62 is fixedly connected to the driving shaft 61;

[0039] Through the setting of the above structure, the driving motor 62 is started to make the driving shaft 61 drive the first pulley 63 to rotate, and through the cooperation of the belt 65, the second pulley 64 can be rotated. Since the second pulley 64 is fixedly connected to the reciprocating thread groove rod 3, the reciprocating thread groove rod 3 will be rotated. By changing the transmission ratio of the first pulley 63 and the second pulley 64, the speed of the reciprocating thread groove rod 3 can be adjusted, so that it can achieve better effect during use.

[0040] Reference Figure 1 , 3 and Figure 6 , wherein a groove column 31 is slidably connected in the thread groove wall of the reciprocating thread groove rod 3, the groove column 31 is fixed to the inner wall of the sliding sleeve 4, the left and right sides of the outer wall of the sliding sleeve 4 are fixedly connected with a rack 41, the lower part of the outer wall of the sliding sleeve 4 is fixedly connected with a telescopic rod 42, the loosening mechanism 7 includes a limit frame 71, a limit column 72, a sliding frame 73 and a loosening plate 74, the lower end surface of the telescopic rod 42 is fixedly connected with a sliding frame 73, the inner cavity of the sliding frame 73 is fixedly connected with the limit column 72, the lower part of the inner cavity of the ash hopper 1 is fixedly connected with the limit frame 71, the limit column 72 slides in the inner cavity of the limit frame 71, and the left and right end surfaces of the sliding frame 73 are fixedly connected with loosening plates 74;

[0041] When the reciprocating thread groove rod 3 rotates, the sliding sleeve 4 is slidably connected to the reciprocating thread groove rod 3 through the groove column 31, and the sliding sleeve 4 can move back and forth on the reciprocating thread groove rod 3 through the cooperation of the limit frame 71 and the telescopic rod 42. Since the sliding sleeve 4 is fixedly connected to the sliding frame 73, the sliding frame 73 will drive the loosening plate 74 to move back and forth in the ash hopper 1 to loosen the ash material, thereby avoiding condensation and causing local voids, which affects the normal use of the material level detection component.

[0042] Reference Figure 1 , 3 and Figure 5Among them, the rapping mechanism 8 includes a fixing plate 81, a rotating rod 82, a gear 83 and a convex block 84. The fixing plate 81 is fixedly connected to the front and rear inner side walls of the ash hopper 1. The rotating rod 82 is rotatably connected to the inner cavity of the fixing plate 81. The gear 83 is fixedly connected to the middle of the outer side wall of the rotating rod 82. The convex blocks 84 are fixedly connected to the left and right sides of the outer side wall of the rotating rod 82. The rapping mechanism 8 and the loosening mechanism 7 should both be arranged at a position between 1 meter and 2 meters above the ash discharge opening 2 of the ash hopper 1. The lowest end of the loosening plate 74 is more than 0.5 meters away from the ash discharge opening;

[0043] When the sliding sleeve 4 is about to move to one side of the ash hopper 1 on the reciprocating threaded groove rod 3, at this time the rack 41 will drive the gear 83 to rotate. Since both the convex block 84 and the gear 83 are fixedly connected to the rotating rod 82, the convex block 84 will rotate and impact the side wall of the ash hopper 1. At this time, the sliding sleeve 4 moves to the end of the reciprocating threaded groove rod 3. The reciprocating threaded groove rod 3 continues to rotate, and the sliding sleeve 4 will move to the other end of the reciprocating threaded groove rod 3. Thus, the whole device realizes the function of indirectly rapping the side wall of the ash hopper 1, further avoiding the generation of ash caking and improving the practicability of the whole device.

[0044] In the present invention, the corresponding height of the upper inclined pipe 52 opening is at 50%-60% of the hopper volume, and the corresponding height of the lower inclined pipe 51 opening is at 15%-20% of the hopper volume, so as to leave enough time for handling defects or abnormalities after the alarm is issued, avoiding the risk of hopper collapse due to excessive ash storage in the hopper and too long load-bearing time of the hopper. Under normal circumstances, since the space of the hopper 1 is interconnected with the vertical pipe 53, the negative pressure in the hopper 1 can be truly reflected by the electric contact remote transmission vacuum gauge 54 on the vertical pipe 53. When the negative pressure is within the normal vacuum range, the circuit in the electric contact remote transmission vacuum gauge control system is in an open state. When the ash conveying system fails and cannot be eliminated for a long time, the ash level in the hopper 1 gradually rises. When the ash level rises to the position of the through hole on the hopper side wall, the pressure value in the vertical pipe 53 changes. When it reaches the predetermined value of the electric contact remote transmission vacuum gauge 54, the circuit in the electric contact remote transmission vacuum gauge control system is connected at this time, sending out an alarm signal and feeding it back to the DCS to achieve the purpose of material level alarm. By setting the through hole opening upward, it can effectively prevent the extension pipe from being blocked by coal ash, affecting the normal operation of the electric contact remote transmission vacuum gauge 54. A manual valve is provided on the vertical pipe. By opening the lower manual valve, the negative pressure in the hopper can be checked on site. When fly ash enters the vertical pipe 53 under special circumstances, it can be dredged by opening the manual valve. If necessary, the pipe can be dredged by back blowing the vertical pipe 53 with compressed air. Starting the drive motor 62 causes the drive shaft 61 to drive the first pulley 63 to rotate. Through the cooperation of the belt 65, the second pulley 64 can be driven to rotate. Since the second pulley 64 is fixedly connected to the reciprocating threaded groove rod 3, the reciprocating threaded groove rod 3 will rotate. By changing the transmission ratio between the first pulley 63 and the second pulley 64, the speed regulation of the reciprocating threaded groove rod 3 can be completed, enabling it to achieve better effects in use. When the reciprocating threaded groove rod 3 rotates, since the sliding sleeve 4 is slidably connected to the reciprocating threaded groove rod 3 through the groove column 31, through the cooperation of the limit frame 71 and the telescopic rod 42, etc., the sliding sleeve 4 can reciprocate back and forth on the reciprocating threaded groove rod 3. Since the sliding sleeve 4 is fixedly connected to the sliding frame 73, the sliding frame 73 will drive the loosening plate 74 to reciprocate back and forth in the hopper 1, loosening the ash material and avoiding its condensation to cause local cavities, affecting the normal use of the material level detection component. When the sliding sleeve 4 is about to move to one side of the hopper 1 on the reciprocating threaded groove rod 3, the rack 41 will drive the gear 83 to rotate at this time. Since the convex block 84 and the gear 83 are both fixedly connected to the rotating rod 82, the convex block 84 will rotate and impact the side wall of the hopper 1. At this time, the sliding sleeve 4 moves to the end of the reciprocating threaded groove rod 3. The reciprocating threaded groove rod 3 continues to rotate, and the sliding sleeve 4 will move to the other end of the reciprocating threaded groove rod 3. Thus, the entire device realizes the function of intermittently vibrating the side wall of the hopper 1, further avoiding the generation of ash material caking and improving the practicability of the entire device. In the present invention, the loosening mechanism 7 and the vibrating mechanism 8 are used at regular intervals under the normal operation of the hopper 1.To ensure the detection accuracy of the material level detection component, when the actual material level in the ash hopper is high and submerges the upper inclined pipe 52, the material level detection component is deactivated, which avoids damage to the material level detection component and ensures its normal service life.

[0045] The above are only the preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered within the protection scope of the present invention.

Claims

1. A combined device for ash hopper level gauges of an electrostatic precipitator in a thermal power plant, characterized in that, Including a hopper: A lower ash outlet (2) is fixedly connected to the lower end surface of the hopper (1). A reciprocating threaded groove rod (3) is rotatably connected to the upper part of the inner cavity of the hopper (1). A sliding sleeve (4) is fixedly connected to the middle of the outer side wall of the reciprocating threaded groove rod (3); A material level detection component (5). A material level detection component (5) is arranged on the right side of the outer side wall of the hopper (1). The material level detection component (5) is used to detect the height of the ash material in the hopper; A driving component (6). A driving component (6) is arranged on the front part of the outer side wall of the hopper (1); A loosening mechanism (7). A loosening mechanism (7) is arranged in the lower part of the inner cavity of the hopper (1). The loosening mechanism (7) is used to loosen the ash material in the hopper (1); A vibrating mechanism (8). A vibrating mechanism (8) is arranged in the upper part of the inner cavity of the hopper (1). The vibrating mechanism (8) is used to impact the side wall of the hopper to accelerate the discharge of the ash material; A groove column (31) is slidably connected in the threaded groove wall of the reciprocating threaded groove rod (3). The groove column (31) is fixed to the inner side wall of the sliding sleeve (4). Rack bars (41) are fixedly connected to the left and right sides of the outer side wall of the sliding sleeve (4). An expansion rod (42) is fixedly connected to the lower part of the outer side wall of the sliding sleeve (4). The loosening mechanism (7) includes a limit frame (71), a limit column (72), a sliding frame (73) and a loosening plate (74). The lower end surface of the expansion rod (42) is fixedly connected to the sliding frame (73). A limit column (72) is fixedly connected to the inner cavity of the sliding frame (73). A limit frame (71) is fixedly connected to the lower part of the inner cavity of the hopper (1). The limit column (72) slides in the inner cavity of the limit frame (71). Loosening plates (74) are fixedly connected to the left and right end faces of the sliding frame (73); The vibrating mechanism (8) includes a fixing plate (81), a rotating rod (82), a gear (83) and a convex block (84). Fixing plates (81) are fixedly connected to the front and rear inner side walls of the hopper (1). A rotating rod (82) is rotatably connected to the inner cavity of the fixing plate (81). A gear (83) is fixedly connected to the middle of the outer side wall of the rotating rod (82). Convex blocks (84) are fixedly connected to the left and right sides of the outer side wall of the rotating rod (82). The gear (83) is meshed with the rack bar (41); 2. The combined device for ash hopper level gauges of an electrostatic precipitator in a thermal power plant according to claim 1, characterized in that, The material level detection component (5) includes a lower inclined pipe (51), an upper inclined pipe (52), a vertical pipe (53), an electric contact remote transmission vacuum gauge (54) and a pneumatic valve (55). An upper inclined pipe (52) is fixedly connected to the upper part of the outer side wall of the hopper (1). A lower inclined pipe (51) is fixedly connected to the lower part of the outer side wall of the hopper (1). Both the lower inclined pipe (51) and the upper inclined pipe (52) are communicated with the vertical pipe (53). A manual valve is arranged on the outer side wall of the vertical pipe (53). The manual valve is installed at a height of 1.4 meters from the ground.

3. The combined device for ash hopper level gauges of an electrostatic precipitator in a thermal power plant according to claim 2, characterized in that, Pneumatic valves (55) are provided on both the lower inclined pipe (51) and the upper inclined pipe (52). The model of the pneumatic valve (55) is D671X remote control pneumatic butterfly valve. An electric contact remote transmission vacuum gauge (54) is installed on the outer wall of the vertical pipe (53) at a position 1.5 meters above the ground. The electric contact remote transmission vacuum gauge (54) is connected to the remote terminal through a connecting wire (541). The upper inclined pipe (52) is opened at the corresponding height when the ash hopper has a volume of 50% - 60%. The lower inclined pipe (51) is opened at the corresponding height when the ash hopper has a volume of 15% - 20%. The lowest end of the vertical pipe (53) is about 1.0 meter from the ground.

4. The combined device for ash hopper level gauges of an electrostatic precipitator in a thermal power plant according to claim 1, characterized in that, The driving assembly (6) includes a driving shaft (61), a driving motor (62), a first pulley (63), a second pulley (64) and a belt (65). The first pulley (63) is rotationally connected to the ash hopper (1) through the driving shaft (61). The front end face of the reciprocating threaded groove rod (3) is fixedly connected with the second pulley (64). A belt (65) is drivingly connected between the first pulley (63) and the second pulley (64). The front end face of the ash hopper is fixedly connected with the driving motor (62) through a frame. The output shaft end of the driving motor (62) is fixedly connected to the driving shaft (61).

5. The combined device for ash hopper level gauges of an electrostatic precipitator in a thermal power plant according to claim 1, characterized in that, Both the vibrating mechanism (8) and the loosening mechanism (7) should be arranged at a position between 1 meter and 2 meters above the ash discharge opening (2) of the ash hopper (1). The lowest end of the loosening plate (74) is more than 0.5 meter away from the ash discharge opening (2).

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