Foreign matter checking and cleaning device for coal conveying belt of power station

Abstract

The invention discloses a power station coal conveying belt foreign matter checking and cleaning device, and relates to the technical field of coal conveying, the power station coal conveying belt foreign matter checking and cleaning device comprises a dustproof unit, the dustproof unit comprises a material guide groove, a shield installed at an opening position above the material guide groove, a material receiving hopper arranged in the middle of the shield, and a connecting rod used for connecting the shield with the material receiving hopper; the filtering unit is installed at the opening position of the top of the protective cover, negative pressure is formed in the opening area of the top of the protective cover through the filtering unit, and then suction of impurities is achieved; the filtering unit corresponds to the receiving hopper in position, and the receiving hopper is used for storing coal ash and impurities. By arranging the filtering unit, coal ash and impurities can be effectively prevented from entering the air pipe, and meanwhile the air suction efficiency can be effectively guaranteed; and a material receiving hopper is further mounted below the filtering unit, so that the impurities and coal ash can be treated in a centralized and unified manner through the material receiving hopper, and a worker can finish impurity cleaning work more conveniently.

Description

Technical Field

[0001] The invention relates to the field of coal transportation, in particular to a device for inspecting and cleaning foreign matter on a coal conveyor belt of a power station. Background Art

[0002] In coal-fired power plants and industrial coal transportation systems, negative pressure dust removal equipment for belt conveyor troughs is crucial to controlling the spread of coal dust. However, the existing technology has exposed significant defects in actual operation: when the train is unloading coal, foreign objects such as woven bag fragments and plastic films mixed in the coal flow can easily enter the trough area with the coal flow. Under the action of the high-speed airflow at the tail of the belt, such lightweight foreign objects are easily sucked into the air inlet duct of the dust collector, causing partial blockage of the air inlet filter bag or duct, resulting in an imbalance of negative pressure in the dust removal system and a sharp drop in dust capture efficiency.

[0003] Under this condition, the high concentration of coal ash overflowing from the sealing failure area of ​​the guide chute not only directly pollutes the working environment and increases the risk of respiratory diseases for operators, but also forms a visual shielding effect in the coal conveyor trestle, seriously interfering with manual inspections and video monitoring equipment's identification of abnormal conditions such as belt deviation and coal blockage. What's more serious is that when operators try to clean foreign objects in the guide chute during belt operation, they face multiple safety threats such as mechanical entanglement and falling from heights. Summary of the invention

[0004] Therefore, the technical problem to be solved by the present invention is that the foreign matter in the existing coal transportation process is not cleaned in time, which leads to the problem that the equipment is prone to failure.

[0005] The above technical problem is solved by the following technical solution: The present invention proposes a foreign body inspection and cleaning device for a coal conveyor belt of a power station, a dust prevention unit, comprising a material guide trough, a shield installed at an opening position above the material guide trough, a material receiving hopper arranged at a central position of the shield, and a connecting rod for connecting the shield with the material receiving hopper; A filter unit, the filter unit comprising a filter bag and a pulse controller for cleaning coal powder on the surface of the filter bag; the filter unit is installed at the top opening of the shield, and the top opening area of ​​the shield forms a negative pressure through the filter unit, thereby achieving the suction of impurities; The filtering unit corresponds to the position of the receiving hopper, the receiving hopper is used to store coal ash and impurities, and a pressure sensor is installed inside the receiving hopper; The connecting rod comprises a cutting knife arranged at the bottom of the connecting rod, and the cutting knife can break the plastic film.

[0006] In a preferred embodiment of the power plant coal conveyor belt foreign body inspection and cleaning device of the present invention: A partition is installed inside the shield, and the partition divides the inside of the shield into an upper chamber and a lower chamber; The receiving hopper is located inside the lower chamber, and the filtering unit is located inside the upper chamber; A through hole is provided at the center of the partition, and the through hole connects the upper and lower chambers.

[0007] In a preferred embodiment of the foreign body inspection and cleaning device for coal conveyor belt of power station of the present invention: the receiving hopper is a conical structure with closed bottom and open top, and the opening direction of the receiving hopper is directly facing the through hole; The number of the connecting rods is multiple groups, and the multiple groups of connecting rods are equidistantly distributed along the edge of the opening of the receiving hopper.

[0008] In a preferred embodiment of the device for inspecting and cleaning foreign matter on a coal conveyor belt of a power station according to the present invention: the cutting blade is oriented toward the bottom of the receiving hopper.

[0009] In a preferred embodiment of the power plant coal conveyor belt foreign body inspection and cleaning device of the present invention: the receiving hopper includes a guide surface arranged on the side wall of the receiving hopper, an arc surface arranged at the bottom of the receiving hopper, and a dividing knife arranged on the surface of the guide surface; The number of the segmentation knives is multiple groups, and the multiple groups of segmentation knives are equidistantly distributed along the guide surface.

[0010] In a preferred embodiment of the device for inspecting and cleaning foreign matter on a coal conveyor belt of a power station according to the present invention: an observation window is provided on the side wall of the shield, and a movable cover is provided on the observation window.

[0011] In a preferred embodiment of the foreign matter inspection and cleaning device for the coal conveyor belt of a power station of the present invention: guide plates are arranged on both sides of the through hole, and the bottom of the guide plates extends to the inside of the through hole; The guide plate is arranged obliquely and is staggered with the cross section of the partition plate.

[0012] In a preferred embodiment of the foreign matter inspection and cleaning device for the coal conveyor belt of a power station of the present invention: a conveyor belt, the guide trough is installed above the conveyor belt; A connecting pipe, one end of which is connected to the opening position at the top of the shield, and the other end of which is connected to a suction fan.

[0013] The beneficial effects of the present invention are as follows: the filter unit is set up to effectively prevent coal ash and impurities from entering the air duct, while also effectively ensuring the efficiency of air suction; a receiving hopper is also installed under the filter unit, through which impurities and coal ash can be centrally and uniformly processed, making it easier for staff to complete the cleaning of impurities. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings of the embodiments of the present invention. Obviously, the drawings in the following description only relate to some embodiments of the present invention, but are not intended to limit the present invention.

[0015] Figure 1 A schematic diagram of the three-dimensional structure of foreign matter cleaning is shown; Figure 2 A half-section view of the shield is shown; Figure 3 A partial cross-sectional view of the shield is shown; Figure 4 A schematic diagram of the three-dimensional structure of the receiving hopper is shown; Figure 5 A schematic diagram of the connection structure between the cutting knife and the receiving hopper is shown.

[0016] In the figure: 1. dustproof unit; 11. material guide trough; 12. protective cover; 121. observation window; 13. receiving hopper; 131. guide surface; 132. arc surface; 133. dividing knife; 14. connecting rod; 141. cutting knife; 15. partition; 151. through hole; 16. guide plate; 2. filter unit; 3. conveyor belt; 4. connecting pipe. DETAILED DESCRIPTION

[0017] In order to enable those skilled in the art to better understand the present invention, the present invention is further described in detail below in conjunction with specific implementation methods and drawings.

[0018] The terms used in the present invention are those general terms currently widely used in the art in consideration of the functions of the present invention, but these terms may vary according to the intention of a person of ordinary skill in the art, precedents, or new technologies in the art. In addition, specific terms may be selected by the applicant, and in this case, their detailed meanings will be described in the detailed description of the present invention. Therefore, the terms used in the specification should not be understood as simple names, but rather as a general description based on the meaning of the terms and the present invention.

[0019] Reference Figure 1 to Figure 3 The present embodiment provides a foreign body inspection and cleaning device for a coal conveyor belt of a power plant, comprising a dust prevention unit 1, including a material guide trough 11, a protective cover 12 installed at an opening position above the material guide trough 11, a material receiving hopper 13 arranged at a central position of the protective cover 12, and a connecting rod 14 for connecting the protective cover 12 with the material receiving hopper 13; a filter unit 2, the filter unit 2 is installed at an opening position at the top of the protective cover 12, and a negative pressure is formed in the opening area at the top of the protective cover 12 through the filter unit 2, thereby realizing the suction of impurities.

[0020] It should be noted that the material guide trough 11 is a rectangular structure, and openings are provided at both ends of the material guide trough 11 along the feeding direction of the conveyor belt 3. In order to prevent the overflow of coal ash, flip-able dust-proof plates are also provided at the openings at both ends of the material guide trough 11; the top opening of the material guide trough 11 extends outward, and connection parts are provided around it, and the connection parts are matched with the protective cover 12, and the material guide trough 11 and the protective cover 12 are connected and fixed by bolts.

[0021] Preferably, the interior of the shield 12 is a hollow structure, and a vent is provided at the top of the shield 12; the vent can be connected to a suction fan, which sucks air from the vent at the top of the shield 12, forming a negative pressure in this area, thereby allowing coal ash and impurities to enter the interior of the shield 12.

[0022] Furthermore, in order to prevent the suction fan from sucking coal powder and impurities into the pipeline during operation, causing blockage or damage to the suction fan, a filter unit 2 is installed at the top of the protective cover 12. The filter unit 2 mainly uses a filter bag to filter coal ash and impurities to ensure that the gas entering the pipeline is clean air, thereby preventing impurities and coal ash from causing damage to the suction fan.

[0023] It should be noted that the receiving hopper 13 is preferably in an inverted cone shape, and the receiving hopper 13 is located in the center of the protective cover 12; the side wall of the receiving hopper 13 can further play a certain guiding role for the coal ash and air, so that the coal ash can be further moved along a specific motion trajectory; the coal ash and impurities will gather on the outside of the filter unit 2 as the gas flows; when the fan stops working, the surface of the plastic film electrostatically absorbs a large amount of coal ash to form agglomerated impurities, and then falls back into the receiving hopper 13 under the action of gravity, which is more convenient for the staff to handle.

[0024] Preferably, connecting rods 14 are connected to the outer wall of the hopper 13 and are fixed to the hopper 13 by welding; one end of the connecting rod 14 away from the hopper 13 extends to the inside of the protective cover 12, and the connecting rod 14 is connected to the protective cover 12 by bolts; ensure that the hopper 13 is stably set in the center of the protective cover 12.

[0025] A receiving hopper 13 is provided below the filtering unit 2 so that the filtered impurities and fly ash fall back into the receiving hopper 13 under the action of gravity, which is more convenient for the staff to handle them in a centralized and unified manner; and the impurities accumulate in the receiving hopper 13 and will not affect the normal movement of the device.

[0026] In summary, the filter unit 2 can effectively filter impurities such as coal ash and plastic film, ensuring that the dust collection work can operate normally; during the operation of the equipment, the plastic film will absorb more coal ash; under the action of gravity, it will fall into the receiving hopper 13 and be centrally and uniformly treated with the coal ash.

[0027] refer to Figure 2 As an optional embodiment, a partition 15 is installed inside the shield 12, and the partition 15 divides the inside of the shield 12 into an upper chamber and a lower chamber; the receiving hopper 13 is located inside the lower chamber, and the filter unit 2 is located inside the upper chamber; a through hole 151 is opened in the center of the partition 15, and the through hole 151 connects the upper and lower chambers.

[0028] It should be noted that a partition 15 is provided inside the protective cover 12, which divides the interior of the protective cover 12 into an upper and a lower chamber, and the lower chamber is connected to the material guide trough 11. A connecting port is opened on the top of the upper chamber, and a suction fan is connected to the connecting port; the material receiving hopper 13 is located inside the lower chamber.

[0029] A through hole 151 is opened in the center of the partition 15, and the through hole 151 connects the upper and lower chambers inside the protective cover 12. The gas flows along the side wall of the hopper 13 and passes through the through hole 151 into the upper chamber, and then the fly ash and plastic film are filtered by the filter unit 2, thereby achieving the purpose of collecting the fly ash and plastic film.

[0030] Preferably, the position of the through hole 151 limits the direction of gas flow, so that the airflow mixed with coal ash and plastic film can be concentrated through the through hole 151 to enter the upper chamber; at the same time, the through hole 151 can facilitate the plastic film and coal ash to fall back into the receiving hopper 13, so as to facilitate the centralized and unified treatment of impurities and plastic film.

[0031] In some embodiments, the receiving hopper 13 is a conical structure with a closed bottom and an open top, and the opening direction of the receiving hopper 13 faces the through hole 151; there are multiple groups of connecting rods 14, and the multiple groups of connecting rods 14 are equidistantly distributed along the edge of the opening of the receiving hopper 13.

[0032] It should be noted that the receiving hopper 13 is a conical structure with a blocked bottom and an open top, so there is no airflow passing through the inside of the receiving hopper 13, so that the impurities and fly ash deposited in the receiving hopper 13 will not be affected by the movement of the equipment.

[0033] Furthermore, the top opening of the receiving hopper 13 is relatively large, providing sufficient space for impurities and coal ash to fall, thereby ensuring that the coal ash can fall into the receiving hopper 13 under the action of gravity.

[0034] Preferably, the receiving hopper 13 is a conical structure with a pointed bottom and an open top. The receiving hopper 13 can also play a certain role in guiding the airflow containing coal ash, so that the airflow moves upward along the side wall of the receiving hopper 13, further ensuring the stability of the internal airflow.

[0035] It should be noted that there are multiple groups of connecting rods 14, and the multiple groups of connecting rods 14 are equidistantly distributed at the edge of the top opening of the receiving hopper 13. The support of the docking hopper 13 can be achieved through the cooperation between the multiple groups of connecting rods 14; the smooth inner wall of the conical structure reduces dust adhesion and reduces the risk of clogging of the protective cover 12, which is particularly suitable for high humidity or sticky dust scenarios.

[0036] Furthermore, the top opening of the receiving hopper 13 can be used as a pressure equalizing port to balance the pressure distribution in the pipeline and prevent the erosion and wear of the filter material by local high-speed airflow; at the same time, a pressure sensor can be installed at the bottom of the inner side of the receiving hopper 13 to facilitate the staff to understand the situation inside the receiving hopper 13 in real time and take corresponding actions according to the values ​​provided by the pressure sensor.

[0037] refer to Figure 3 to Figure 5 In one embodiment provided by the present invention, a connecting rod 14 is included, and a cutting knife 141 is arranged at the bottom of the connecting rod 14, and the cutting edge of the cutting knife 141 is facing the bottom position of the receiving hopper 13.

[0038] It should be noted that in order to further prevent the plastic film from being entangled on the outside of the connecting rod 14 and causing inconvenience for the staff to clean, a cutting knife 141 is installed at the bottom of the connecting rod 14 to cut the plastic film, which can effectively reduce the volume of the plastic film.

[0039] Specifically, when the plastic film flows toward the filter unit 2 along with the air flow, the contact position between the middle end of the plastic film and the cutting knife 141 is blocked by the cutting knife 141, while the two ends of the plastic film are pulled by the negative pressure of the air and tend to move toward the filter unit 2; at this point, the two ends of the plastic film are subjected to an upward force, and the contact position between the plastic film and the cutting knife 141 is subjected to a downward force from the cutting knife 141, so that the cutting knife 141 can cut the plastic film.

[0040] Furthermore, the receiving hopper 13 is surrounded by a conical structure. When the plastic film flows upward with the airflow, the inclined side walls of the receiving hopper 13 will not interfere with the movement trajectory of the plastic film, thereby achieving the plastic film being concentrated below the filter unit 2 with the airflow.

[0041] refer to Figure 4 and Figure 5 In one embodiment provided by the present invention, a receiving hopper 13 is included, including a guide surface 131 arranged on the side wall, an arc surface 132 arranged at the bottom of the receiving hopper 13, and a dividing knife 133 arranged on the surface of the guide surface 131; the dividing knives 133 are in multiple groups, and the multiple groups of dividing knives 133 are equidistantly distributed along the guide surface 131.

[0042] It should be noted that the guide surface 131 is a smooth planar structure, the receiving hopper 13 may include multiple groups of guide surfaces 131, and a cutting blade may be formed at the intersection of adjacent guide surfaces 131, which may further break the plastic film to prevent an excessively large plastic film from unfolding and adhering to the bottom of the filter unit 2, causing the equipment to be unable to operate normally.

[0043] Furthermore, the bottom sealing position of the receiving hopper 13 is a circular structure, which can reduce the friction between the plastic film and the receiving hopper 13, so that the plastic film will not be hindered by the receiving hopper 13 during the flow process, ensuring that the plastic film can flow normally to the bottom of the filter unit 2.

[0044] In order to further improve the crushing effect of the plastic film, the side wall of the guide surface 131 is provided with multiple groups of dividing knives 133, and the dividing knives 133 are evenly distributed on the side wall of the guide surface 131. The plastic film passes through the dividing knives 133 and is then cut by the cutting edges of the dividing knives 133, thereby being able to fragment the plastic film, further preventing the plastic film from clogging the filter unit 2.

[0045] refer to Figure 3 In some embodiments, a side wall of the shield 12 is provided with an observation window 121, and the observation window 121 is provided with a movable cover.

[0046] It should be noted that, in order to facilitate the staff to observe the internal situation of the protective cover 12 more intuitively, an observation window 121 is opened on the side wall of the protective cover 12, and a transparent cover is installed at the position of the observation window 121, and the cover is rotatably connected to the protective cover 12; and a circle of rubber is attached around the cover to achieve a sealing effect to prevent coal powder from overflowing.

[0047] Furthermore, when something happens inside the protective cover 12 , the situation inside the protective cover 12 can be handled accordingly by opening the observation window 121 .

[0048] Specifically, when a large piece of plastic film is adsorbed on the surface of the filter unit 2, the observation window 121 can be opened and the plastic film attached to the surface of the filter unit 2 can be cleaned off with a tool to ensure that the device can operate normally and smoothly.

[0049] In an embodiment provided by the present invention, guide plates 16 are arranged on both sides of the through hole 151 , and the bottom of the guide plates 16 extends into the through hole 151 ; the guide plates 16 are arranged obliquely and are staggered with the cross section of the partition 15 .

[0050] It should be noted that guide plates 16 are provided on both sides of the through hole 151 , and the guide plates 16 can form a funnel-shaped structure, so that the coal ash deposited on the surface of the guide plates 16 can fall into the inside of the receiving hopper 13 by gravity.

[0051] Specifically, a large amount of coal ash and plastic film are attached to the surface of the filter unit 2. The coal ash and the plastic film are adsorbed together by static electricity. When the accumulated amount gradually increases, the gravity is greater than the force that adsorbs the coal ash together, and the coal ash falls under the action of gravity. Part of the coal ash will fall onto the guide plate 16 or directly fall into the receiving hopper 13, and the other part of the coal ash will fall on the surface of the guide plate 16, and will also slide into the receiving hopper 13 under the action of gravity as the coal ash accumulates, thereby ensuring the uniformity of coal ash collection.

[0052] Furthermore, the bottom of the guide plate 16 extends to the inside of the through hole 151 , and as the airflow flows toward the filter unit 2 , the bottom of the guide plate 16 does not affect the gas entering the upper chamber, effectively preventing the plastic film from accumulating at the through hole 151 .

[0053] In some embodiments, it also includes a conveyor belt 3, with a material guide trough 11 installed above the conveyor belt 3; a connecting pipe 4, one end of the connecting pipe 4 is connected to the top opening position of the protective cover 12, and the other end is connected to a suction fan.

[0054] In this embodiment, the conveyor belt 3 is used to transport the coal, and the conveyor belt 3 can feed the material horizontally or inclined, thereby completing the transportation of the material; and in order to reduce the coal ash and plastic film in the coal, the guide trough 11 is installed above the conveyor belt 3, and the two ends of the guide trough 11 are open, and a closing plate is provided at the opening, which can effectively prevent the coal ash from overflowing during the dust collection process.

[0055] It should be noted that a connecting pipe 4 is installed on the top of the protective cover 12, and the connecting pipe 4 is connected to the top opening of the protective cover 12, which is equivalent to installing a filter unit 2 at the bottom opening of the connecting pipe 4. The clean gas filtered by the filter unit 2 is discharged by the exhaust fan through the connecting pipe 4, and impurities are accumulated on the surface of the filter unit 2, which is convenient for the staff to clean up later.

[0056] Furthermore, the inlet filter bag of the filter unit 2 is designed to be convex to increase the surface area, thereby reducing the problem of the dust collection flow and speed being affected by the large area blocked by foreign matter due to the filter bag being too small; after the equipment stops running, the foreign matter can fall back into the receiving hopper 13 along the guide plate 16.

[0057] Specifically, dusty air enters the protective cover 12 from the air inlet. Due to the sudden expansion of the airflow volume and the sudden decrease in flow rate, the larger dust particles are blocked on the outer wall of the filter bag under the action of their own weight. The purified gas is discharged from the air outlet of the upper box through the venturi of the filter bag. The remaining dust enters the filtration area of ​​the middle box with the airflow under the guidance of the diversion system and is adsorbed on the outer surface of the filter bag.

[0058] When there are a lot of dust particles accumulated on the filter bag, the pulse controller sends a signal to open the electromagnetic pulse valve, so that the compressed air in the air bag is sprayed from the blowing pipe to the corresponding Venturi tube, driving the surrounding air to form a recoil airflow into the filter bag, causing the filter bag to expand and contract rapidly, causing impact vibration, and then shaking off the excess dust particles accumulated on the outer wall of the filter bag, achieving the dust removal effect, and realizing the cleaning of the filter bag in the filter unit 2.

[0059] Specifically, the conveyor belt 3 is used to transport the coal. When the coal passes through the guide trough 11, the end of the connecting pipe 4 is connected to the suction fan, so that negative pressure is formed in the top opening area of ​​the shield 12, so that the coal ash and plastic film flow to the negative pressure area. When the plastic film passes through the cutting knife 141 and the dividing knife 133, it is cut into smaller pieces and then flows to the interior of the upper chamber. The air passes through the pores of the filter bag of the filter unit 2, and the coal ash and plastic film adhere to the surface of the filter unit 2, thereby effectively collecting the coal ash and plastic film; then, the coal ash and plastic film attached to the surface of the filter unit 2 can be cleaned by pulses. After the coal ash and plastic film are separated from the surface of the filter bag, they will fall back to the inside of the receiving hopper 13 under the action of gravity, thereby realizing the concentration and unification of the coal ash and plastic film, which is convenient for the next cleaning work.

[0060] In this embodiment, a negative pressure is formed at the air inlet by a suction fan, and the airflow containing the plastic film and the fly ash is sucked upward and guided to the filter unit 2; the clean air is discharged through the filter bag, and the fly ash and the plastic film are adsorbed on the surface of the filter bag.

[0061] Specifically, the suction fan is started to suck air mixed with impurities into the protective cover 12, and the coal ash and plastic film in the air are filtered through the filter unit 2. During the gas flow, the coal ash and plastic film are approached to the filter unit 2 with the air flow, so that the coal ash and plastic film are adsorbed on the outside of the filter bag.

[0062] The cleaning device of the filter unit 2 is started to clean the coal ash and plastic film attached to the surface of the filter bag, so that the cleaned coal ash and plastic film fall into the inside of the receiving hopper 13 under the action of gravity.

[0063] When the equipment is blocked, the suction fan is stopped, and then the pulse device is started to vibrate the filter bag, so that the coal ash and plastic film adsorbed on the surface of the filter bag are separated from the surface of the filter bag and settled into the receiving hopper 13 under the action of gravity.

[0064] When the fly ash and plastic film fall off the filter bag, part of the fly ash and plastic film will fall on the surface of the guide plate 16 and slide along the inclined surface of the guide plate 16 into the receiving hopper 13, so that the fly ash and plastic film can be processed in a centralized and unified manner.

[0065] When the amount of impurities accumulated in the receiving hopper 13 reaches a preset threshold, the detection unit triggers an alarm signal to prompt the operator to perform a cleaning operation.

[0066] Specifically, when the coal ash and plastic film accumulate to a certain amount inside the receiving hopper 13, the pressure sensor installed at the inner bottom of the receiving hopper 13 will feed back the pressure signal to the staff. By observing the pressure signal, the staff can better judge the coal ash storage situation inside the receiving hopper 13; when the coal ash storage amount reaches a certain amount, the staff will stop the equipment and clean up the coal ash.

[0067] Furthermore, in this embodiment, the receiving hopper 13 includes a bottom and an upper part; the bottom and the upper part are connected in a hinged manner. When the impurities inside the receiving hopper 13 accumulate to a certain amount, the staff can enter the protective cover 12 through the observation window 121 and operate the bottom of the receiving hopper 13 to open, and then the impurities accumulated inside the receiving hopper 13 can be cleaned out.

[0068] The operator responds to the alarm signal and opens the discharge port at the bottom of the receiving hopper 13 to complete the centralized cleaning of impurities.

[0069] Specifically, when the alarm sounds, the staff stops the equipment operation, and then places a receiving tray at the bottom of the receiving hopper 13, and then opens the bottom of the receiving hopper 13 to uniformly process the coal ash stored in the receiving hopper 13.

[0070] Finally, it should be pointed out that the methods and devices described in detail above are only embodiments, and those skilled in the art can modify these embodiments in different ways without departing from the scope of the present invention.

Claims

1. A device for inspecting and cleaning foreign matter on a coal conveyor belt of a power station, characterized in that: include, A dust prevention unit (1) comprising a material guide trough (11), a protective cover (12) installed at an opening position above the material guide trough (11), a material receiving hopper (13) arranged at a central position of the protective cover (12), and a connecting rod (14) for connecting the protective cover (12) and the material receiving hopper (13); A filter unit (2), the filter unit (2) comprising a filter bag and a pulse controller for cleaning coal powder on the surface of the filter bag; the filter unit (2) is installed at the top opening of the protective cover (12), and the top opening area of ​​the protective cover (12) forms a negative pressure through the filter unit (2), thereby achieving the suction of impurities; The filtering unit (2) corresponds to the position of the receiving hopper (13), the receiving hopper (13) is used to store coal ash and impurities, and a pressure sensor is installed inside the receiving hopper (13); The connecting rod (14) comprises a cutting knife (141) arranged at the bottom of the connecting rod (14), and the cutting knife (141) is capable of breaking the plastic film.

2. A foreign body inspection and cleaning device for coal conveyor belt in power station according to claim 1, characterized in that: A partition (15) is installed inside the shield (12), and the partition (15) divides the inside of the shield (12) into an upper chamber and a lower chamber; The receiving hopper (13) is located inside the lower chamber, and the filtering unit (2) is located inside the upper chamber; A through hole (151) is provided at the center of the partition (15), and the through hole (151) connects the upper and lower chambers.

3. A foreign body inspection and cleaning device for a coal conveyor belt in a power station according to claim 2, characterized in that: The receiving hopper (13) is a conical structure with a closed bottom and an open top, and the opening direction of the receiving hopper (13) faces the through hole (151); The number of the connecting rods (14) is multiple groups, and the multiple groups of connecting rods (14) are equidistantly distributed along the edge of the opening of the receiving hopper (13).

4. A foreign body inspection and cleaning device for a coal conveyor belt in a power station according to claim 3, characterized in that: The cutting edge of the cutting knife (141) faces the bottom of the receiving hopper (13).

5. The device for inspecting and cleaning foreign matter on a coal conveyor belt of a power station according to claim 3, characterized in that: The receiving hopper (13) comprises a guide surface (131) arranged on a side wall of the receiving hopper (13), a curved surface (132) arranged at the bottom of the receiving hopper (13), and a dividing knife (133) arranged on the surface of the guide surface (131); The dividing knives (133) are provided in a plurality of groups, and the plurality of groups of dividing knives (133) are distributed at equal distances along the guide surface (131).

6. A foreign body inspection and cleaning device for a coal conveyor belt in a power station according to claim 5, characterized in that: An observation window (121) is provided on the side wall of the protective cover (12), and the observation window (121) is provided with a movable cover plate.

7. The device for inspecting and cleaning foreign matter on a coal conveyor belt of a power station according to claim 2, characterized in that: Guide plates (16) are arranged on both sides of the through hole (151), and the bottom of the guide plates (16) extends into the interior of the through hole (151); The guide plate (16) is arranged obliquely, and has a cross section that is staggered with the partition plate (15).

8. The device for inspecting and cleaning foreign matter on a coal conveyor belt of a power station according to claim 3, characterized in that: Also includes, A conveyor belt (3), wherein the material guide trough (11) is installed above the conveyor belt (3); A connecting pipe (4), one end of the connecting pipe (4) is connected to the top opening of the protective cover (12), and the other end is connected to a suction fan.

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