Pebble coal hopper of intelligent coal mill and control system of pebble coal hopper

Abstract

The invention discloses an intelligent coal mill pebble coal hopper and a control system thereof, and relates to the technical field of coal mill accessories, and the intelligent coal mill pebble coal hopper comprises a coal hopper box, a feeding control unit, a state detection unit and a damping discharging unit. According to the system, material level monitoring, powder monitoring and spark monitoring can be carried out on pebble coal falling into the coal hopper box, the microprocessor is used for receiving monitoring data sent by all instruments, the state of the pebble coal is displayed through the instrument panel, and the microprocessor can send a corresponding control request to the coal mill according to the monitoring data, so that the pebble coal is controlled. Coal quantity, air quantity and outlet temperature control under the automatic state of the coal mill is automatically participated, and the target of improving the working condition of the coal mill is achieved; in addition, the ash falling prevention design can effectively guarantee the imaging effect and the subsequent monitoring precision, the damping assembly can effectively cope with vibration caused by impact force when pebble coal falls, and therefore the purposes of damping and noise reduction are achieved.

Description

Technical Field

[0001] The invention relates to the technical field of coal mill accessories, in particular to an intelligent coal mill stone coal hopper and a control system thereof. Background Art

[0002] With the improvement of automation and office efficiency of coal-fired power generation units, the efficiency and safety of pulverizing system equipment have been greatly improved, but the discharge of pebble coal from coal mills is still not timely, and the pebble coal discharge situation has a serious lag in guiding the adjustment of coal mill working conditions. How to timely improve the working conditions of coal mills through the discharge of pebble coal hoppers in coal mills has always been the management direction of coal-fired units to ensure the safe and efficient operation of pulverizing systems;

[0003] The current coal mill stone coal hopper has the following working process: the power plant staff sets the automatic flushing time of the stone coal hopper according to regulations, so as to discharge the stone coal regularly. If the stone coal discharge is large, the coal mill will be blocked; at the same time, the on-site inspection personnel regularly check the discharge situation. If it is found that the stone coal discharge contains coal powder, the centralized control personnel will be notified to increase the air volume of the coal mill to increase the ventilation output of the coal mill. If the coal powder keeps leaking, the boiler efficiency will decrease; if it is found that the stone coal discharge contains sparks, the centralized control personnel will be notified to appropriately reduce the outlet temperature of the coal mill and notify the maintenance to inspect the coal mill. If it is not handled in time, the coal mill will have the risk of explosion. Due to the complex working conditions of the coal mill and the difficulty of the inspection personnel to find it in the first time, the adjustment of the coal mill is delayed, the risk of explosion and blockage of the coal mill is increased, and the inefficient operation time of the coal mill boiler with coal powder is increased; in order to solve the above problems existing in the prior art, we propose an intelligent coal mill stone coal hopper and its control system. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the existing defects and provide an intelligent coal mill pebble coal hopper and its control system, which has a reliable status detection unit and can monitor the material level, powder content and sparks of the pebble coal falling into the coal hopper box. The microprocessor is used to receive the monitoring data from each instrument and display the status of the pebble coal through the instrument panel. The microprocessor can send corresponding control requests to the coal mill according to the monitoring data, and then automatically participate in the coal quantity, air volume and outlet temperature control of the coal mill in the automatic state, so as to achieve the goal of improving the working condition of the coal mill. In addition, the pebble coal hopper also has an anti-ash falling design and a shock absorbing component, which can prevent the lens module from falling ash, effectively ensure the imaging effect and subsequent monitoring accuracy, and the shock absorbing component can effectively cope with the vibration caused by the impact force when the pebble coal falls, thereby achieving the purpose of shock absorption and noise reduction, and can effectively solve the problems in the background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions: an intelligent coal mill stone coal hopper and its control system, comprising a coal hopper box, a feed control unit, a state detection unit and a shock-absorbing discharge unit;

[0006] Coal hopper box: It is a cubic structure, and a square connection seat is fixedly connected at the upper end. The front side of the coal hopper box is embedded with an instrument panel and a microprocessor, and the instrument panel and the microprocessor are bidirectionally electrically connected;

[0007] Feed control unit: installed inside and on the upper side of the connecting seat;

[0008] State detection unit: including a mounting frame, a protective shell, a visual lens 1, a fill light, an ultrasonic rangefinder, a fixing block and a fan. A circular passage is provided inside the connecting seat. A cross-shaped mounting frame is installed at the lower port of the connecting seat. The mounting frame is fixedly connected to the lower end of the connecting seat through the fixing blocks at the four ends. The fixing block is an inverted Ω-shaped structure. The fixing block is fixed to the connecting seat through bolts at both ends. A circular protective shell is fixedly connected to the central intersection of the cross-shaped mounting frame. A visual lens 1 is installed inside the protective shell. A fan is embedded in the middle side of the lower end of the fixing block. The four fan air outlets are all horizontally facing the visual lens 1. A circle of fill lights is installed at the lower edge of the protective shell. An ultrasonic rangefinder is installed at the middle position of each section of the cross-shaped mounting frame.

[0009] Shock-absorbing discharge unit: installed at the lower position inside the coal hopper box.

[0010] The connection seat is used to install and fix the coal hopper box at the slag discharge port of the coal mill. The coal hopper box is used to collect the discharged stone coal. The microprocessor installed on the front side of the coal hopper box is used to receive the monitoring data from various instruments and display the status of the stone coal through the instrument panel. The microprocessor can send corresponding control requests to the coal mill according to the monitoring data, and then automatically participate in the coal quantity, air volume, and outlet temperature control of the coal mill in the automatic state, so as to achieve the goal of improving the working conditions of the coal mill. The feeding control unit is used to realize the opening and closing control of the feeding channel of the stone coal. Through the components of the state detection unit, the stone coal collected in the coal hopper box can be monitored for material level, powder and sparks, so as to ensure the safe and effective production of each part; the mounting frame is used for the installation of visual lens 1 and ultrasonic rangefinder. The protective shell protects the visual lens 1. The visual lens 1 is installed in the center position above the coal hopper box, which can effectively monitor whether the stone coal in the box has sparks. The four ultrasonic rangefinders distributed in a rectangular shape can cover the material level height of the four areas in the coal hopper box, avoiding the use of a single detection point. To cope with the uneven material level, the accuracy of monitoring data can be ensured. The fixing block is used to fix the mounting frame and to install the fan. The fan blows out wind to prevent dust from sticking to the detection end of the visual lens 1 and the ultrasonic rangefinder, thereby ensuring monitoring accuracy. The fill light is controlled by the microprocessor. When the visual lens 1 is performing monitoring, the fill light will be temporarily turned off to improve the capture effect of the visual lens 1 on sparks by darkening the inside of the coal hopper box. The shock-absorbing discharge unit is used to realize the discharge of stone coal, and the vibration noise caused by the falling of stone coal is reduced by performing shock-absorbing treatment on the material docking parts.

[0011] Furthermore, the state detection unit also includes a lens module 2, a lens brush, a card slot and a movable push rod. A lens module 2 is embedded and installed at the middle position of the inner wall on the left and right sides of the coal hopper box. A lens brush is installed on the outside of the lens module 2. The lens brush is slidably connected to the card slot on the side of the lens module 2 through the side card plate. Two electric push rods 1 are installed on the lower side of the lens module 2. The telescopic end of the electric push rod 1 extends to the inside of the lens module 2 and is fixedly connected to the side card plate of the lens brush. The lens modules 2 on the left and right sides monitor the powder carrying condition of the stone coal during the falling process. During the falling process, the coal powder and the stone coal form a speed difference on the vertical plane. According to the difference in appearance, the lens module 2 can effectively identify the coal powder mixed in the stone coal, so as to monitor the amount of coal powder. The lens brush can slide up and down under the drive of the electric push rod 1, so as to brush off the dust adhering to the lens module 2.

[0012] Furthermore, the feed control unit includes a bolt through hole and a connecting channel. A circular connecting channel is fixedly connected to the middle of the upper end of the connecting seat. The connecting channel vertically corresponds to the circular channel inside the connecting seat and has the same inner diameter. A fan-shaped area is provided at the four corners of the lower end of the connecting seat, and a bolt through hole is provided at the four corners of the upper end of the connecting seat. The connecting channel is used to connect with the slag discharge port of the coal mill, and the bolt through hole is used to install bolt fasteners, thereby fixing the connecting seat to the coal mill.

[0013] Furthermore, the feed control unit further comprises a baffle chute, a channel baffle, a linkage plate and a hydraulic cylinder. A horizontal baffle chute is provided in the middle layer inside the connecting seat. The baffle chute is slidably connected to the left and right channel baffles. A linkage plate is fixedly connected to the outside of each channel baffle. A group of hydraulic cylinders are embedded and installed on both sides of the connecting seat. The two hydraulic cylinders of each group are arranged horizontally, and the telescopic ends are respectively fixedly connected to the inner sides of the front and rear ends of the linkage plate. The baffle chute is used for the installation of the channel baffle, and the hydraulic cylinders on both sides drive the channel baffle to open and close through the linkage plate.

[0014] Furthermore, the shock-absorbing discharge unit includes an installation chute, a supporting rod frame, an electronic scale and a supporting plate. A mounting chute is provided at the lower position of the inner wall of the coal hopper box, and the mounting chute is provided at the middle position of the inner walls on the four sides. The supporting rod frame is a cross-shaped structure and each section thereof is slidably connected to the inside of the mounting chute on the corresponding side. An electronic scale is fixedly installed at the center position of the supporting rod frame, and a square supporting plate is fixedly installed at the upper end of the electronic scale, and the supporting plate is slidably connected to the inner wall of the coal hopper box. The mounting chute is used for the installation of the supporting rod frame, the supporting rod frame is used for the installation of the electronic scale, the supporting plate is used for supporting the docking material platform, and the electronic scale is used to measure the weight of the fallen stone coal, thereby improving the accuracy of material level monitoring by matching mass data with distance data.

[0015] Furthermore, the shock-absorbing discharge unit also includes a vertical slide bar, a damper and a spring. The vertical slide bars are fixedly connected in the installation grooves on the inner walls of the four sides. A damper is installed at the end of the support rod frame. The support rod frame is slidably connected to the vertical slide bar through the damper. A spring is sleeved on the outside of each vertical slide bar, and the upper end of the spring is against the lower side of the damper. The impact brought by the falling stone coal will cause the support plate to vibrate up and down. The spring is used to buffer the force transmitted to the support rod frame, and the damper gradually weakens the vibration force, thereby achieving the purpose of shock absorption and noise reduction.

[0016] Furthermore, the shock-absorbing discharge unit also includes a material receiving platform, a material trough, a mounting block and a nozzle. The upper end of the support plate is fixedly connected to the material receiving platform. The upper end of the material receiving platform is an inclined surface that converges toward the middle, and a horizontal material trough is opened in the middle of the material receiving platform. The cross-section of the material trough is a circular structure, and a mounting block is fixedly installed at the left port. The inside of the mounting block is fixedly connected to a nozzle, and the two ends of the nozzle extend from the left and right sides of the mounting block respectively. The inclined surfaces that converge toward the middle on both sides of the material receiving platform can facilitate the stone coal to slide toward the material trough on the middle side. The mounting block is used for the installation of the nozzle. The nozzle sprays high-pressure water from the left side to the right to flush the stone coal in the material trough outward.

[0017] Furthermore, the shock-absorbing discharge unit also includes a booster water pump and a support frame, the support frame is fixedly connected to the lower left end of the coal hopper box, the booster water pump is fixedly installed on the upper end of the support frame, the water inlet of the booster water pump faces forward, and the water outlet of the booster water pump is connected to the left side of the nozzle through a leather hose. The support frame is used for the installation of the booster water pump, and the booster water pump draws water from an external source and pressurizes it so that the water column sprayed from the nozzle can have sufficient impact.

[0018] Furthermore, the shock-absorbing discharge unit further comprises a discharge port, a discharge port baffle and a second electric push rod. A square discharge port is provided on the right side of the coal hopper box and at a position corresponding to the punching trough in the horizontal direction. The upper side of the discharge port is slidably connected with the discharge port baffle. The second electric push rod is embedded and installed in the right side wall of the coal hopper box, and the telescopic end of the second electric push rod is downwardly fixedly connected with the upper side of the discharge port baffle. The second electric push rod is used to control the lifting and lowering of the discharge port baffle, thereby realizing the opening and closing control of the discharge port.

[0019] Furthermore, the control system comprises three parts: material level monitoring, powder monitoring and spark monitoring. The operating principles of each part are as follows:

[0020] a. The material level value is obtained by weighing the pebble coal or ultrasonic ranging. When the material level in the pebble coal hopper is too high, if the device is in automatic state, the microprocessor sends a control signal to the coal mill to start the discharge program, close the material discharge channel, and open the discharge port baffle; the monitoring module performs real-time detection of the material level inside the coal hopper to prevent the material level from being too high;

[0021] b. Through image processing technology, the brightness of the coal is collected and matched to achieve dust monitoring. When the falling stone coal is detected to contain sparks, if the device is in automatic state, the microprocessor sends a control signal to the coal mill to start the cooling program: open the cold air door and close the hot air door to reduce the outlet temperature of the coal mill; the monitoring module performs real-time detection of the stone coal inside the coal hopper to promptly detect the situation of sparks in the discharged stone coal;

[0022] c. Through image processing technology, the grayscale conditions are collected, identified and matched to realize the monitoring of coal dust. When it is detected that the fallen stone coal contains a large amount of coal dust, the microprocessor sends a control signal to the coal mill to start the air volume control: open the hot and cold air valves to increase the air volume setting value; the monitoring module performs real-time detection of the stone coal inside the coal hopper to promptly detect the situation where the coal dust content in the discharged stone coal exceeds the standard;

[0023] d. If the automatic control program times out, a reset alarm message will be issued to request manual intervention; when the device is in manual mode, the monitoring device will only issue an alarm message.

[0024] Compared with the prior art, the beneficial effects of the present invention are: the intelligent coal mill stone coal hopper and its control system have the following advantages:

[0025] 1. It has a reliable status detection unit, which can monitor the material level, powder and spark of the pebble coal falling into the coal hopper. The microprocessor installed on the front side of the coal hopper is used to receive the monitoring data from various instruments and display the status of the pebble coal through the instrument panel. The microprocessor can send corresponding control requests to the coal mill according to the monitoring data, and then automatically participate in the coal volume, air volume and outlet temperature control of the coal mill in the automatic state, so as to achieve the goal of improving the working condition of the coal mill;

[0026] 2. It has a dust-proof design for the lens module to ensure the imaging effect and subsequent monitoring accuracy: a fan is embedded in the middle side of the lower end of the fixed block, and the four fan air outlets are all horizontally facing the visual lens 1. The fan blows out wind to prevent dust from sticking to the visual lens 1 and the detection end of the ultrasonic rangefinder; at the lens module 2 on the left and right sides, the lens brush can slide up and down driven by the electric push rod 1, so as to brush off the dust adhered to the lens module 2;

[0027] 3. It has a shock-absorbing component. When the stone coal falls, the impact it brings will cause the support plate to vibrate up and down. The spring is used to buffer the force transmitted to the support rod frame, and the damper gradually weakens the vibration force, thereby achieving the purpose of shock absorption and noise reduction;

[0028] 4. The present invention has a reliable status detection unit, which can monitor the material level, powder content and sparks of the pebble coal dropped into the coal hopper box. The microprocessor is used to receive the monitoring data from various instruments and display the status of the pebble coal through the instrument panel. The microprocessor can send corresponding control requests to the coal mill according to the monitoring data, and then automatically participate in the coal quantity, air volume and outlet temperature control of the coal mill in the automatic state, so as to achieve the goal of improving the working condition of the coal mill. In addition, the pebble coal hopper also has an anti-ash falling design and a shock absorbing component, which can prevent the lens module from falling ash, effectively ensure the imaging effect and subsequent monitoring accuracy, and the shock absorbing component can effectively deal with the vibration caused by the impact force when the pebble coal falls, so as to achieve the purpose of shock absorption and noise reduction. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the structure of the present invention;

[0030] Figure 2 It is a schematic diagram of the upper structure of the present invention;

[0031] Figure 3 This is a schematic diagram of the internal structure of the coal hopper box in the present invention;

[0032] Figure 4 The present invention is cut away Figure 1 ;

[0033] Figure 5 The present invention is cut away Figure 2 ;

[0034] Figure 6 It is a schematic diagram of the local structure of the present invention;

[0035] Figure 7 For the present invention Figure 5 A magnified view of the structure at center;

[0036] Figure 8 For the present invention Figure 5 A magnified view of the structure at B in the middle;

[0037] Fig. 9 For the present invention Figure 6 A magnified view of the structure at C in the middle;

[0038] Fig.10 It is a schematic diagram of the structure on the right side of the present invention.

[0039] In the figure: 1 coal hopper box, 2 connecting seat, 3 feeding control unit, 31 baffle slide, 32 channel baffle, 33 linkage plate, 34 hydraulic cylinder, 35 bolt through hole, 36 connecting channel, 4 state detection unit, 41 mounting frame, 42 protective shell, 43 visual lens 1, 44 fill light, 45 ultrasonic rangefinder, 46 fixing block, 47 fan, 48 lens module 2, 49 lens brush, 410 card slot, 411 electric push rod 1, 5 shock-absorbing discharge unit, 51 mounting slide, 52 vertical slide bar, 53 supporting rod rack, 54 electronic scale, 55 supporting plate, 56 damper, 57 spring, 58 receiving table, 59 punching trough, 510 mounting block, 511 nozzle, 512 sliding block, 513 booster water pump, 514 support plate rack, 515 discharge port, 516 material port baffle, 517 electric push rod 2, 6 instrument panel, 7 microprocessor. DETAILED DESCRIPTION

[0040] 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.

[0041] See also Figure 1-Figure 10 , This embodiment provides a technical solution: an intelligent coal mill stone coal hopper and its control system, including a coal hopper box 1, a feed control unit 3, a state detection unit 4 and a shock-absorbing discharge unit 5;

[0042] The coal hopper box 1 is a cubic structure, and a square connection seat 2 is fixedly connected to the upper end. The front side of the coal hopper box 1 is embedded with an instrument panel 6 and a microprocessor 7, and the instrument panel 6 and the microprocessor 7 are bidirectionally electrically connected;

[0043] Feed control unit 3: installed inside and on the upper side of the connecting seat 2;

[0044] State detection unit 4: includes a mounting frame 41, a protective shell 42, a visual lens 43, a fill light 44, an ultrasonic rangefinder 45, a fixing block 46 and a fan 47. A circular passage is provided inside the connection seat 2. A cross-shaped mounting frame 41 is installed at the lower port of the connection seat 2. The mounting frame 41 is fixedly connected to the lower end of the connection seat 2 through fixing blocks 46 at four ends. The fixing block 46 is an inverted Ω-shaped structure. The fixing block 46 is fixed to the connection seat 2 through bolts at both ends. A circular protective shell 42 is fixedly connected to the central intersection of the cross-shaped mounting frame 41. A visual lens 43 is installed inside the protective shell 42. A fan 47 is embedded in the middle side of the lower end of the fixing block 46. The air outlets of the four fans 47 are all horizontally facing the visual lens 43. A circle of fill lights 44 are installed at the lower edge of the protective shell 42. An ultrasonic rangefinder 45 is installed at the middle position of each section of the cross-shaped mounting frame 41.

[0045] The shock-absorbing discharge unit 5 is installed at a lower position inside the coal hopper box 1 .

[0046] The connecting seat 2 is used to install and fix the coal hopper box 1 at the slag discharge port of the coal mill. The coal hopper box 1 is used to collect the discharged pebble coal. The microprocessor 7 installed on the front side of the coal hopper box 1 is used to receive the monitoring data transmitted by various instruments and display the status of the pebble coal through the instrument panel 6. The microprocessor 7 can send corresponding control requests to the coal mill according to the monitoring data, and then automatically participate in the control of coal quantity, air volume and outlet temperature in the automatic state of the coal mill, so as to achieve the goal of improving the working condition of the coal mill. The feeding control unit 3 is used to realize the opening and closing control of the feeding channel of the pebble coal. Through the components of the state detection unit 4, the pebble coal collected in the coal hopper box 1 can be monitored for material level, powder and sparks, so as to ensure the safe and effective production of each part; the mounting frame 41 is used for the installation of the visual lens 43 and the ultrasonic rangefinder 45, and the protective shell 42 protects the visual lens 43. The visual lens 43 is installed in the center position above the coal hopper box 1, and can effectively monitor whether the pebble coal in the box carries sparks. The four ultrasonic rangefinders 45 distributed in a rectangular shape can cover the material level heights of the four areas in the coal hopper box 1, avoiding the problem that a single detection point cannot cope with. The uneven material level in various places can ensure the accuracy of monitoring data; the fixing block 46 is used to fix the mounting frame 41 and to install the fan 47. The fan 47 prevents the visual lens 43 and the detection end of the ultrasonic rangefinder 45 from adhering to dust by blowing out wind, thereby ensuring the monitoring accuracy; the fill light 44 is controlled by the microprocessor 7. When the visual lens 43 performs monitoring, the fill light 44 will be temporarily turned off to improve the visual lens 43's ability to capture Mars by darkening the inside of the coal hopper box 1; the shock-absorbing discharge unit 5 is used to realize the discharge of stone coal, and the vibration noise caused by the falling of stone coal is reduced by performing shock-absorbing treatment on the docking material components.

[0047] The status detection unit 4 also includes a lens module 2 48, a lens brush 49, a card slot 410 and a movable push rod 411. A lens module 2 48 is embedded and installed in the middle position of the inner walls on the left and right sides of the coal hopper box 1. A lens brush 49 is installed on the outer side of the lens module 2 48. The lens brush 49 is slidably connected to the card slot 410 on the side of the lens module 2 48 through the side card plate. Two electric push rods 1 411 are installed on the lower side of the lens module 2 48. The telescopic end of the electric push rod 1 411 extends into the interior of the lens module 2 48 and is fixedly connected to the side card plate of the lens brush 49. The lens modules 2 48 on the left and right sides monitor the powder content of the pebble coal during the falling process. During the falling process, the coal powder and the pebble coal form a speed difference on the vertical plane, and according to the difference in appearance, the lens module 2 48 can effectively identify the coal powder mixed in the pebble coal, thereby monitoring the amount of the coal powder. The lens brush 49 can slide up and down under the drive of the electric push rod 1 411, thereby brushing off the dust adhered to the lens module 2 48.

[0048] The feed control unit 3 comprises a bolt through hole 35 and a connection channel 36. A circular connection channel 36 is fixedly connected to the middle of the upper end of the connection seat 2. The connection channel 36 corresponds vertically to the circular channel inside the connection seat 2 and has the same inner diameter. A fan-shaped area is provided at the four corners of the lower end of the connection seat 2, and a bolt through hole 35 is provided at the four corners of the upper end of the connection seat 2. The connection channel 36 is used to connect with the slag discharge port of the coal mill, and the bolt through hole 35 is used to install bolt fasteners, so as to fix the connection seat 2 to the coal mill.

[0049] The feed control unit 3 also includes a baffle chute 31, a channel baffle 32, a linkage plate 33 and a hydraulic cylinder 34. A horizontal baffle chute 31 is provided in the middle layer inside the connection seat 2. Two left and right channel baffles 32 are slidably connected inside the baffle chute 31. A linkage plate 33 is fixedly connected to the outside of each channel baffle 32. A group of hydraulic cylinders 34 are embedded and installed on both sides of the connection seat 2. The two hydraulic cylinders 34 of each group are arranged horizontally, and the telescopic ends are fixedly connected to the inner sides of the front and rear ends of the linkage plate 33. The baffle chute 31 is used for the installation of the channel baffle 32. The hydraulic cylinders 34 on both sides drive the channel baffle 32 to open and close through the linkage plate 33.

[0050] The shock-absorbing discharge unit 5 comprises an installation chute 51, a supporting rod frame 53, an electronic scale 54 and a supporting plate 55. An installation chute 51 is provided at the lower position of the inner wall of the coal hopper box 1. The installation chute 51 is provided at the middle position of the inner wall of the four sides. The supporting rod frame 53 is a cross-shaped structure and each section thereof is slidably connected to the inside of the installation chute 51 on the corresponding side. An electronic scale 54 is fixedly installed at the center position of the supporting rod frame 53. A square supporting plate 55 is fixedly installed at the upper end of the electronic scale 54. The supporting plate 55 is slidably connected to the inner wall of the coal hopper box 1. The installation chute 51 is used for the installation of the supporting rod frame 53, the supporting rod frame 53 is used for the installation of the electronic scale 54, the supporting plate 55 is used for supporting the docking material platform 58, and the electronic scale 54 is used for measuring the weight of the fallen stone coal, thereby improving the accuracy of material level monitoring by matching mass data with distance data.

[0051] The shock-absorbing discharge unit 5 also includes a vertical slide bar 52, a damper 56 and a spring 57. The vertical slide bars 52 are fixedly connected in the mounting slots 51 on the inner walls of the four sides. A damper 56 is installed at the end of the supporting rod frame 53. The supporting rod frame 53 is slidably connected with the vertical slide bar 52 through the damper 56. A spring 57 is sleeved on the outer side of each vertical slide bar 52, and the upper end of the spring 57 is against the lower side of the damper 56. The impact brought by the falling of the stone coal will cause the supporting plate 55 to vibrate up and down. The spring 57 is used to buffer the force transmitted to the supporting rod frame 53, and the damper 56 gradually weakens the vibration force, thereby achieving the purpose of shock absorption and noise reduction.

[0052] The shock-absorbing discharge unit 5 also includes a receiving platform 58, a flushing trough 59, a mounting block 510 and a nozzle 511. The upper end of the support plate 55 is fixedly connected to the receiving platform 58. The upper end of the receiving platform 58 is an inclined surface that converges toward the middle, and a transverse flushing trough 59 is opened in the middle of the receiving platform 58. The cross section of the flushing trough 59 is a circular structure, and a mounting block 510 is fixedly installed at the left end. The inside of the mounting block 510 is fixedly connected to the nozzle 511, and the two ends of the nozzle 511 extend from the left and right sides of the mounting block 510 respectively. The inclined surfaces that converge toward the middle on both sides of the receiving platform 58 can facilitate the stone coal to slide toward the flushing trough 59 on the middle side. The mounting block 510 is used for the installation of the nozzle 511. The nozzle 511 sprays high-pressure water from the left side to the right to flush the stone coal in the flushing trough 59 outward.

[0053] The shock-absorbing discharge unit 5 also includes a booster water pump 513 and a support frame 514. The support frame 514 is fixedly connected to the lower left end of the coal hopper box 1. The booster water pump 513 is fixedly installed on the upper end of the support frame 514. The water inlet of the booster water pump 513 faces forward, and the water outlet of the booster water pump 513 is connected to the left side of the nozzle 511 through a leather hose. The support frame 514 is used for the installation of the booster water pump 513. The booster water pump 513 draws water from an external source and pressurizes it, so that the water column sprayed from the nozzle 511 can have sufficient impact.

[0054] The shock-absorbing discharge unit 5 further comprises a discharge port 515, a discharge port baffle 516 and a second electric push rod 517. A square discharge port 515 is provided on the right side of the coal hopper box 1 and at a position corresponding to the punching slot 59 in the horizontal direction. The discharge port 515 is slidably connected to the upper side of the discharge port baffle 516. The second electric push rod 517 is embedded and installed in the right side wall of the coal hopper box 1, and the telescopic end of the second electric push rod 517 is downwardly fixedly connected to the upper side of the discharge port baffle 516. The second electric push rod 517 is used to control the lifting and lowering of the discharge port baffle 516, thereby realizing the opening and closing control of the discharge port 515.

[0055] The control system consists of three parts: material level monitoring, powder monitoring and spark monitoring. The operating principles of each part are as follows:

[0056] a. The material level value is obtained by weighing the pebble coal or ultrasonic ranging. When the material level of the pebble coal hopper is too high, if the device is in automatic state, the microprocessor 7 sends a control signal to the coal mill to start the discharge program, close the material discharge channel, and open the discharge port baffle; the monitoring module performs real-time detection of the material level inside the coal hopper to prevent the material level from being too high;

[0057] b. Through image processing technology, the matching brightness is collected and identified to realize powder monitoring. When it is detected that there are sparks in the falling stone coal, if the device is in automatic state, the microprocessor 7 sends a control signal to the coal mill to start the cooling program: open the cold air door and close the hot air door to reduce the outlet temperature of the coal mill; the monitoring module performs real-time detection of the stone coal inside the coal hopper to promptly detect the situation of sparks in the discharged stone coal;

[0058] c. Through image processing technology, the grayscale conditions are collected, identified and matched to realize the monitoring of coal dust. When it is detected that the fallen stone coal contains a large amount of coal dust, the microprocessor 7 sends a control signal to the coal mill to start the air volume control: open the hot and cold air adjustment valves to increase the air volume setting value; the monitoring module performs real-time detection of the stone coal inside the coal hopper to promptly detect the situation where the coal dust content in the discharged stone coal exceeds the standard;

[0059] d. If the automatic control program times out, a reset alarm message will be issued to request manual intervention; when the device is in manual mode, the monitoring device will only issue an alarm message.

[0060] The working principle of the intelligent coal mill stone coal hopper and its control system provided by the present invention is as follows: when installing the stone coal hopper, connect the connecting channel 36 and the slag discharge port of the coal mill, and fit the connecting seat 2 with the bottom of the coal mill, and then install bolts at the bottom of the connecting seat 2 to fix the connecting seat 2 to the coal mill. When the stone coal hopper is working, the feeding control unit 3 is used to realize the opening and closing control of the stone coal feeding channel, the baffle chute 31 is used to install the channel baffle 32, and the hydraulic cylinders 34 on both sides drive the channel baffle 32 to open and close through the linkage plate 33. The gravel coal passing through the feed channel falls on the upper side of the receiving platform 58. The inclined surfaces on both sides of the receiving platform 58 that converge toward the middle can help the gravel coal slide to the flushing trough 59 on the middle side. The mounting block 510 is used for the installation of the nozzle 511. The nozzle 511 sprays high-pressure water from the left side to the right to flush the gravel coal in the flushing trough 59 outward; the support frame 514 is used for the installation of the booster water pump 513. The booster water pump 513 draws external water source and pressurizes it so that the water column sprayed from the nozzle 511 can have enough impact; the electric push rod 517 is used to control the lifting and lowering of the material port baffle 516, thereby realizing the opening and closing control of the discharge port 515. In addition to ultrasonic monitoring of the material level height, an electronic scale 54 is also provided at the bottom of the material receiving platform 58, the mounting chute 51 is used for the installation of the supporting rod frame 53, the supporting rod frame 53 is used for the installation of the electronic scale 54, the supporting plate 55 is used to support the material receiving platform 58, and the electronic scale 54 is used to measure the weight of the fallen stone coal, thereby improving the accuracy of material level monitoring by coordinating mass data with distance data; and it has a shock absorbing component for the impact of the falling stone coal: the impact brought by the falling stone coal will cause the supporting plate 55 to vibrate up and down, the spring 57 is used to buffer the force transmitted to the supporting rod frame 53, and the damper 56 gradually weakens the vibration force, thereby achieving the purpose of shock absorption and noise reduction.The pebble coal hopper has a reliable status detection unit 4, which can monitor the material level, powder and sparks of the pebble coal falling into the coal hopper box 1. The microprocessor 7 installed on the front side of the coal hopper box 1 is used to receive the monitoring data from various instruments and display the status of the pebble coal through the instrument panel 6. The microprocessor 7 can send corresponding control requests to the coal mill according to the monitoring data, and then automatically participate in the coal quantity, air volume and outlet temperature control of the coal mill in the automatic state, so as to achieve the goal of improving the working condition of the coal mill: the mounting frame 41 is used for the installation of the visual lens 43 and the ultrasonic rangefinder 45, and the protective shell 42 protects the visual lens 43. The visual lens 43 is installed in the center position above the coal hopper box 1, which can effectively monitor the pebble coal in the box. Whether there is sparks, four ultrasonic rangefinders 45 distributed in a rectangular shape can cover the material level heights of the four areas in the coal hopper box 1, avoiding the situation where a single detection point cannot cope with the uneven material level in various places, thereby ensuring the accuracy of the monitoring data; the fill light 44 is controlled by the microprocessor 7. When the visual lens 1 43 performs monitoring, the fill light 44 will be temporarily turned off to improve the visual lens 1 43's capture effect of sparks by darkening the inside of the coal hopper box 1; the lens modules 2 48 on the left and right sides monitor the powder situation of the pebble coal during the falling process. During the falling process, the coal powder and the pebble coal form a speed difference on the vertical plane, and according to the difference in appearance, the lens module 2 48 can effectively identify the coal powder mixed in the pebble coal, thereby monitoring the amount of coal powder. The status detection unit 4 also has an anti-dust design for the lens module to ensure the imaging effect and subsequent monitoring accuracy: the fixed block 46 is used to fix the mounting frame 41 and to install the fan 47. The fan 47 blows out wind to prevent dust from adhering to the detection end of the visual lens 1 43 and the ultrasonic rangefinder 45, thereby ensuring monitoring accuracy; the lens brush 49 can slide up and down under the drive of the electric push rod 1 411, so as to brush off the dust adhering to the lens module 2 48.

[0061] It is worth noting that the input ends of the hydraulic cylinder 34, fill light 44, fan 47, booster pump 513, electric push rod 1 411, electric push rod 2 517, visual lens 1 43, lens module 2 48, ultrasonic rangefinder 45, instrument panel 6 and electronic scale 54 disclosed in the above embodiments are all bidirectionally electrically connected to the microprocessor 7, and the microprocessor 7 controls the operation of the above electrical devices using methods commonly used in the prior art.

[0062] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. An intelligent coal mill stone hopper and its control system, characterized by: It comprises a coal hopper box (1), a feeding control unit (3), a state detection unit (4) and a shock-absorbing discharge unit (5); The coal hopper box (1) is a cubic structure, and a square connection seat (2) is fixedly connected to the upper end. A dashboard (6) and a microprocessor (7) are embedded and installed on the front side of the coal hopper box (1). The dashboard (6) and the microprocessor (7) are bidirectionally electrically connected. Feed control unit (3): installed inside and on the upper side of the connecting base (2); The state detection unit (4) comprises a mounting frame (41), a protective shell (42), a visual lens (43), a fill light (44), an ultrasonic rangefinder (45), a fixing block (46) and a fan (47), and a circular channel is provided inside the connecting seat (2). A cross-shaped mounting frame (41) is installed at the lower port of the connecting seat (2). The mounting frame (41) is fixedly connected to the lower end of the connecting seat (2) through fixing blocks (46) at four ends. The fixing block (46) is an inverted Ω-shaped structure. The fixing block (46) is fixed to the connecting seat (2) through bolts at both ends. A circular protective shell (42) is fixedly connected at the central intersection position of the cross-shaped mounting frame (41). A visual lens (43) is installed inside the protective shell (42). A fan (47) is embedded and installed on the middle side of the lower end of the fixing block (46). The air outlets of the four fans (47) are all horizontally facing the visual lens (43). A circle of fill lights (44) are installed at the lower edge of the protective shell (42). An ultrasonic rangefinder (45) is installed at the middle position of each section of the cross-shaped mounting frame (41). The shock-absorbing discharge unit (5) is installed at a lower position inside the coal hopper box (1).

2. The intelligent coal mill stone hopper and control system according to claim 1 is characterized by: The state detection unit (4) further comprises a lens module 2 (48), a lens brush (49), a card slot (410) and an electric push rod 1 (411). A lens module 2 (48) is embedded and installed at the middle position of the inner walls on the left and right sides of the coal hopper box (1). A lens brush (49) is installed on the outer side of the lens module 2 (48). The lens brush (49) is slidably connected to the card slot (410) on the side of the lens module 2 (48) through a side card plate. Two electric push rods 1 (411) are installed on the lower side of the lens module 2 (48). The telescopic end of the electric push rod 1 (411) extends into the interior of the lens module 2 (48) and is fixedly connected to the side card plate of the lens brush (49).

3. The intelligent coal mill stone coal hopper and control system according to claim 1 is characterized in that: The feed control unit (3) comprises a bolt through hole (35) and a connecting channel (36); a circular connecting channel (36) is fixedly connected to the middle of the upper end of the connecting seat (2); the connecting channel (36) vertically corresponds to the circular channel inside the connecting seat (2) and has the same inner diameter; a fan-shaped area is provided at the four corners of the lower end of the connecting seat (2); and a bolt through hole (35) is provided at the four corners of the upper end of the connecting seat (2).

4. The intelligent coal mill stone hopper and control system according to claim 1 is characterized in that: The feed control unit (3) further comprises a baffle slide groove (31), a channel baffle (32), a linkage plate (33) and a hydraulic cylinder (34); a transverse baffle slide groove (31) is provided in the middle layer inside the connecting seat (2); two left and right channel baffles (32) are slidably connected inside the baffle slide groove (31); a linkage plate (33) is fixedly connected to the outer side of each channel baffle (32); a group of hydraulic cylinders (34) are embedded and installed on both sides of the connecting seat (2); the two hydraulic cylinders (34) of each group are transversely arranged, and the telescopic ends are respectively fixedly connected to the inner sides of the front and rear ends of the linkage plate (33).

5. The intelligent coal mill stone hopper and control system according to claim 1 is characterized in that: The shock-absorbing discharge unit (5) comprises a mounting slide groove (51), a supporting rod frame (53), an electronic scale (54) and a supporting plate (55). A mounting slide groove (51) is provided at a lower position of the inner wall of the coal hopper box (1). The mounting slide groove (51) is provided at the middle position of the inner walls of the four sides. The supporting rod frame (53) is a cross-shaped structure and each section thereof is slidably connected to the inside of the mounting slide groove (51) on the corresponding side. An electronic scale (54) is fixedly mounted at the center position of the supporting rod frame (53). A square supporting plate (55) is fixedly mounted on the upper end of the electronic scale (54). The supporting plate (55) is slidably connected to the inner wall of the coal hopper box (1).

6. The intelligent coal mill stone hopper and control system according to claim 5, characterized in that: The shock-absorbing discharge unit (5) further comprises a vertical slide bar (52), a damper (56) and a spring (57); the vertical slide bars (52) are fixedly connected in the mounting grooves (51) on the inner walls of the four sides; a damper (56) is installed at the end of the supporting rod frame (53); the supporting rod frame (53) is slidably connected to the vertical slide bar (52) through the damper (56); a spring (57) is sleeved on the outer side of each vertical slide bar (52); the upper end of the spring (57) is pressed against the lower side of the damper (56).

7. The intelligent coal mill stone hopper and control system according to claim 5 is characterized by: The shock-absorbing discharge unit (5) further comprises a material receiving platform (58), a material punching trough (59), a mounting block (510) and a nozzle (511); the upper end of the support plate (55) is fixedly connected to the material receiving platform (58); the upper end of the material receiving platform (58) is an inclined surface that converges toward the middle; a transverse material punching trough (59) is provided in the middle of the material receiving platform (58); the cross section of the material punching trough (59) is a circular structure; a mounting block (510) is fixedly installed at the left end; a nozzle (511) is fixedly connected to the inside of the mounting block (510); and two ends of the nozzle (511) extend from the left and right sides of the mounting block (510) respectively.

8. The intelligent coal hopper of coal mill and control system thereof according to claim 7 is characterized in that: The shock-absorbing discharge unit (5) further comprises a booster water pump (513) and a support frame (514); the support frame (514) is fixedly connected to the lower left end of the coal hopper box (1); the booster water pump (513) is fixedly installed on the upper end of the support frame (514); the water inlet of the booster water pump (513) faces forward, and the water outlet of the booster water pump (513) is connected to the left side of the nozzle (511) through a leather hose.

9. The intelligent coal mill stone hopper and control system according to claim 1, characterized in that: The shock-absorbing discharge unit (5) further comprises a discharge port (515), a discharge port baffle (516) and a second electric push rod (517). A square discharge port (515) is provided on the right side of the coal hopper box (1) and at a position corresponding laterally to the punching groove (59). The upper side of the discharge port (515) is slidably connected to the discharge port baffle (516). The second electric push rod (517) is embedded and installed in the right side wall of the coal hopper box (1), and the telescopic end of the second electric push rod (517) is fixedly connected to the upper side of the discharge port baffle (516) facing downward.

10. The intelligent coal hopper of coal mill and control system thereof according to claim 1, characterized in that: The control system consists of three parts: material level monitoring, powder monitoring and spark monitoring. The operating principles of each part are as follows: a. The material level value is obtained by weighing the stone coal or ultrasonic ranging. When the material level of the stone coal hopper is too high, if the device is in automatic state, the microprocessor (7) sends a control signal to the coal mill to start the discharge program, close the feeding channel, and open the discharge port baffle; The monitoring module detects the material level inside the coal hopper in real time to prevent the material level from being too high; b. Through image processing technology, the brightness of the coal is collected and matched to realize the monitoring of coal dust. When the falling stone coal is detected to contain sparks, if the device is in the automatic state, the microprocessor (7) sends a control signal to the coal mill to start the cooling program: open the cold air door and close the hot air door to reduce the outlet temperature of the coal mill; the monitoring module performs real-time detection of the stone coal inside the coal hopper to promptly detect the situation of sparks in the discharged stone coal; c. Through image processing technology, the grayscale conditions are collected, identified and matched to realize the monitoring of coal dust. When it is detected that the fallen stone coal contains a large amount of coal dust, the microprocessor (7) sends a control signal to the coal mill to start the air volume control: open the hot and cold air adjustment valves to increase the air volume setting value; the monitoring module performs real-time detection of the stone coal inside the coal hopper to promptly detect the situation where the coal dust content in the discharged stone coal exceeds the standard; d. If the automatic control program times out, a reset alarm message will be issued to request manual intervention; when the device is in manual mode, only an alarm message will be issued.

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