A coal feeder discharge mechanism and its control method

Abstract

The present application relates to the technical field of discharge mechanism, disclose a coal feeder discharge mechanism and control method thereof, including box and coal feeder, the top of the box is provided with feed inlet, and the box is hollow, the inside is provided with crushing mechanism, the crushing mechanism below is provided with screen; The coal feeder is connected with the box through the screen, wherein the coal feeder conveying cavity one side is provided with discharge port, the other side away from the discharge port is provided with air drying device, the coal feeder pipe wall close to the discharge port is provided with multiple groups of humidity sensor. The control method of the coal feeder discharge mechanism includes: presetting the blockage level; Collecting the data of humidity sensor and laser probe; According to the real-time laser probe data, the blockage level is matched; According to the real-time blockage level, the corresponding nozzle size and air jet speed are selected, and the drying device temperature is matched according to the humidity sensor data.

Description

Technical Field

[0001] This invention relates to the field of material discharge mechanism technology, and in particular to a coal feeder discharge mechanism and its control method. Background Technology

[0002] Currently, to ensure the completion of the company's annual targets, increasing the blending of economic coal to reduce fuel costs has become a necessary means. However, due to the fact that economic coal is significantly wetter and stickier than the designed coal, with smaller particle size and poorer dispersion, it is very easy for it to adhere to the wall, causing frequent coal feeder interruptions at the upper and lower parts of the feeder inlet gate, which seriously affects the normal operation of the equipment.

[0003] Furthermore, rain and other factors can cause coal to become damp and sticky, easily leading to blockages in the pipeline from the coal feeder to the coal mill. Currently, equipment shutdown and manual cleaning of the hopper are required. Therefore, proposing a coal feeder discharge mechanism that can automatically detect and resolve blockages and dampness is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0004] The technical problem this invention aims to solve is that rain and other factors cause coal to become damp and sticky, easily leading to blockages in the pipeline from the coal feeder to the coal mill. Currently, it requires stopping the equipment and manually clearing and cleaning the silos.

[0005] To solve the above-mentioned technical problems, the present invention provides a coal feeder discharge mechanism, including a housing and a coal feeder. The housing has a feed inlet at the top and is hollow inside, with a crushing mechanism inside. A screen is installed below the crushing mechanism. The coal feeder is connected to the housing through the screen. A discharge port is provided on one side of the coal feeder's transport chamber, and a jet drying device is provided on the other side away from the discharge port. Multiple humidity sensors are installed on the wall of the coal feeder pipe near the discharge port.

[0006] Preferably, the crushing mechanism includes a conveyor belt and crushing devices, and multiple crushing devices are provided, with different crushing devices connected by the conveyor belt to rotate synchronously.

[0007] Preferably, the crushing device includes a crushing shaft and crushing rods, the conveyor belt is connected to the crushing shaft, and multiple layers of crushing rods are fixedly connected to the crushing shaft from top to bottom, with the crushing rods perpendicular to the crushing shaft.

[0008] Preferably, the jet drying device includes a jet device, a nozzle, a drying device, and a laser probe; the drying device is disposed between the jet device and the nozzle, the drying device is electrically connected to the humidity sensor, and the laser probe is disposed on the side of the nozzle away from the drying device and is electrically connected to the nozzle.

[0009] Preferably, the nozzle includes an adjusting blade, a first pull rod, a second pull rod, a rotating shaft, and a fixed plate. The adjusting blade is connected to the fixed plate via the rotating shaft. The first pull rod is fixedly connected to the inner wall of the fixed plate, and a limiting groove matching the second railing is provided in the first pull rod. One end of the second pull rod is electrically connected to the first pull rod, and the other end is connected to the adjusting blade.

[0010] Furthermore, this application also includes a control method applied to the above-mentioned coal feeder discharge mechanism, the method comprising:

[0011] Pre-set congestion levels;

[0012] Collect data from humidity sensors and laser probes;

[0013] The blockage level is matched based on real-time laser probe data;

[0014] Select the appropriate nozzle size and jet speed based on the real-time clogging level, and match the drying unit temperature based on humidity sensor data.

[0015] Preferably, when the congestion level is preset, it includes:

[0016] The coal feeder's transport chamber is divided into three equal parts: the chamber closest to the laser probe is the near end, the chamber closest to the discharge port is the far end, and the middle chamber is the middle end. The reflection time of the laser probe irradiating the near end chamber is preset as the first reflection time, the reflection time of irradiating the middle end chamber is preset as the second reflection time, and the reflection time of irradiating the far end chamber is preset as the third reflection time.

[0017] The first detection time and the second detection time of the laser probe are preset, wherein the first detection time is shorter than the second detection time;

[0018] The first detection time and the first reflection time are set as the first blockage level;

[0019] The second detection time and the first reflection time, as well as the first detection time and the second reflection time, are set as the second blockage level.

[0020] The second detection time and the second reflection time, the first detection time and the third reflection time are set as the third level of blockage.

[0021] The second detection time and the third reflection time are set as the fourth level of blockage.

[0022] Preferably, a first nozzle size and a second nozzle size are preset, wherein the second nozzle size is smaller than the first nozzle size;

[0023] A first jet velocity and a second jet velocity of a preset jet device, wherein the first jet velocity is less than the second jet velocity;

[0024] Pre-set corresponding response plans based on the congestion level, including:

[0025] When the first level of blockage is reached, the first nozzle size and the first jet velocity are used as the first response measures;

[0026] When the second blockage level is reached, the second nozzle size and the first jet velocity will be used as the second response.

[0027] When the blockage level is at the third level, the first nozzle size and the second jet velocity are used as the third response strategy;

[0028] When the fourth level of blockage is reached, the second nozzle size and the second jet velocity are used as the fourth response strategy.

[0029] Compared with the prior art, the coal feeder discharge mechanism and its control method provided in this embodiment of the invention have the following advantages:

[0030] A coal feeder discharge device includes a crushing unit, comprising a crushing shaft and crushing rods. A conveyor belt is connected to the crushing shaft, and multiple layers of crushing rods are fixedly connected to the crushing shaft from top to bottom, with the crushing rods perpendicular to the crushing shaft. A motor only needs to drive one crushing shaft to rotate all the crushing shafts via the conveyor belt. In this embodiment, the crushing rods on different crushing shafts are not on the same horizontal plane, thus better crushing the coal entering through the feed inlet. After crushing, the coal passes through a screen before entering the coal feeder. Coal that does not pass through the screen continues to be crushed by the crushing rods at the bottom of the crushing unit until it passes through the screen.

[0031] A laser probe determines the position of the coal. If the coal position remains unchanged for an extended period, it is assumed that a blockage has occurred in the coal feeder's discharge mechanism. The blockage is then addressed by adjusting the response method. Multiple response methods are implemented to handle different blockage situations, minimizing costs while resolving the blockage. Furthermore, a humidity sensor monitors the real-time moisture content of the coal in the feeder. Based on this moisture content, the temperature of the drying device is adjusted, and the gas from the jet device is heated to dehumidify the coal, preventing blockages in the feeder's discharge mechanism caused by damp coal.

[0032] By setting up the first and second pull rods, the adjusting blades are driven to rotate along the rotating shaft, thereby adjusting the size of the nozzle orifice to further increase the pressure of the gas ejected by the jet device, better addressing the blockage problem, and saving more energy. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0034] Figure 1 This is an overall schematic diagram of a coal feeder discharge mechanism provided in an embodiment of the present invention;

[0035] Figure 2 This is a schematic diagram of the nozzle of a coal feeder discharge mechanism provided in an embodiment of the present invention;

[0036] Figure 3 This is a schematic diagram of the control method for the coal feeder discharge structure provided in an embodiment of the present invention.

[0037] In the diagram, 100 is the housing; 101 is the feed inlet; 102 is the screen; 103 is the crushing rod; 104 is the conveyor belt; 105 is the crushing shaft; 200 is the coal feeder; 210 is the jetting device; 220 is the drying device; 230 is the nozzle; 231 is the fixed plate; 232 is the rotating shaft; 233 is the adjusting blade; 234 is the first pull rod; 235 is the second pull rod; 240 is the laser probe; 250 is the humidity sensor; and 260 is the discharge port. Detailed Implementation

[0038] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0039] In the description of this application, it should be understood that the terms "center," "upper," and "lower" are used interchangeably.

[0040] The orientation or positional relationship indicated by terms such as "bottom", "inner", and "outer" is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the purpose of facilitating the description of this application and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this application.

[0041] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0042] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0043] like Figure 1 As shown, Figure 1 This is a schematic diagram of the overall discharge mechanism of a coal feeder according to a preferred embodiment of the present invention. It can be seen that:

[0044] The coal feeder 200 discharge mechanism includes a housing 100 and a coal feeder 200. The housing 100 has a feed inlet 101 on its upper part and is hollow inside, with a crushing mechanism inside. A screen 102 is installed below the crushing mechanism. The coal feeder 200 is connected to the housing 100 through the screen 102. The coal feeder 200 has a discharge outlet 260 on one side of its transport chamber and a jet drying device on the other side away from the discharge outlet 260. Multiple humidity sensors 250 are installed on the wall of the coal feeder 200 near the discharge outlet 260.

[0045] In this preferred embodiment, the crushing mechanism includes a conveyor belt 104 and crushing devices. Multiple crushing devices are provided, and different crushing devices are connected by the conveyor belt 104 to rotate synchronously.

[0046] In this preferred embodiment, the crushing device includes a crushing shaft 105 and crushing rods 103. The conveyor belt 104 is connected to the crushing shaft 105. Multiple layers of crushing rods 103 are fixedly connected to the crushing shaft 105 from top to bottom, and the crushing rods 103 are perpendicular to the crushing shaft 105.

[0047] In this way, the motor only needs to drive one crushing shaft 105 to drive all the crushing shafts 105 to rotate via the conveyor belt 104. In this embodiment, the crushing rods 103 on different crushing shafts 105 are not on the same horizontal plane, which can better crush the coal entering from the feed inlet 101. After crushing, the coal can enter the coal feeder 200 after being selected by the screen 102. The coal that does not pass through the screen 102 continues to be crushed by the crushing rods 103 at the bottom of the crushing device until it passes through the screen 102.

[0048] In this preferred embodiment, the jet drying device includes a jet device 210, a nozzle 230, a drying device 220, and a laser probe 240; the laser probe 240 is disposed on the side of the nozzle 230 away from the drying device 220, and is electrically connected to the nozzle 230.

[0049] Thus, the embodiment provided in this application can determine the position information of the coal through the laser probe 240. When it is found that the position of the coal remains unchanged for a long time, it is considered that the coal is blocked in the discharge mechanism of the coal feeder 200, and the blockage problem is solved by changing the response method.

[0050] Laser probe 240 emits a laser pulse via a laser. These laser pulses are highly directional and coherent, enabling them to propagate with extremely high precision. When the laser pulse strikes the coal, some of the laser energy is reflected back to laser probe 240. Laser probe 240 records the time elapsed between laser emission and reception. This time is called the "time of flight." Based on the time of flight of the laser pulse, laser probe 240 can calculate the distance between the coal and laser probe 240.

[0051] In this preferred embodiment, a drying device 220 is provided between the jetting device 210 and the nozzle 230, and the drying device 220 is electrically connected to the humidity sensor 250.

[0052] In this way, the humidity sensor 250 can monitor the humidity of the coal in the coal feeder 200 in real time, and adjust the temperature of the drying device 220 according to the humidity of the coal in the coal feeder 200 to heat the gas of the jet device 210, thereby dehumidifying the coal and preventing the coal feeder 200 from being blocked due to dampness.

[0053] To better understand the adjustment of nozzle 230, please refer to... Figure 2 , Figure 2 This is a schematic diagram of the nozzle 230 of the discharge mechanism of a coal feeder 200 provided in an embodiment of the present invention;

[0054] As can be seen in this preferred embodiment, the nozzle 230 includes an adjusting blade 233, a first pull rod 234, a second pull rod 235, a rotating shaft 232, and a fixed disk 231. The adjusting blade 233 is connected to the fixed disk 231 through the rotating shaft 232. The first pull rod 234 is fixedly connected to the inner wall of the fixed disk 231, and a limiting groove matching the second railing is provided in the first pull rod 234. One end of the second pull rod 235 is electrically connected to the first pull rod 234, and the other end is connected to the adjusting blade 233.

[0055] In this way, since the first pull rod 234 is provided with a limiting groove that matches the second pull rod 235, the second pull rod 235 can slide along the limiting groove under the action of the motor, thereby driving the adjusting blade 233 to rotate along the rotating shaft 232, thereby adjusting the size of the nozzle 230 opening, further increasing the pressure of the gas ejected by the jet device 210, better addressing the blockage problem, and saving more energy.

[0056] Furthermore, this application also includes a control method applied to the above-mentioned coal feeder discharge mechanism, the method comprising:

[0057] Pre-set congestion levels;

[0058] Collect data from humidity sensors and laser probes;

[0059] The blockage level is matched based on real-time laser probe data;

[0060] Select the appropriate nozzle size and jet speed based on the real-time clogging level, and match the drying unit temperature based on humidity sensor data.

[0061] Preferably, when the congestion level is preset, it includes:

[0062] The coal feeder's transport chamber is divided into three equal parts: the chamber closest to the laser probe is the near end, the chamber closest to the discharge port is the far end, and the middle chamber is the middle end. The reflection time of the laser probe irradiating the near end chamber is preset as the first reflection time, the reflection time of irradiating the middle end chamber is preset as the second reflection time, and the reflection time of irradiating the far end chamber is preset as the third reflection time.

[0063] The first detection time and the second detection time of the laser probe are preset, wherein the first detection time is shorter than the second detection time;

[0064] The first detection time and the first reflection time are set as the first blockage level;

[0065] The second detection time and the first reflection time, as well as the first detection time and the second reflection time, are set as the second blockage level.

[0066] The second detection time and the second reflection time, the first detection time and the third reflection time are set as the third level of blockage.

[0067] The second detection time and the third reflection time are set as the fourth level of blockage.

[0068] Preferably, a first nozzle size and a second nozzle size are preset, wherein the second nozzle size is smaller than the first nozzle size;

[0069] A first jet velocity and a second jet velocity of a preset jet device, wherein the first jet velocity is less than the second jet velocity;

[0070] Pre-set corresponding response plans based on the congestion level, including:

[0071] When the first level of blockage is reached, the first nozzle size and the first jet velocity are used as the first response measures;

[0072] When the second blockage level is reached, the second nozzle size and the first jet velocity will be used as the second response.

[0073] When the blockage level is at the third level, the first nozzle size and the second jet velocity are used as the third response strategy;

[0074] When the fourth level of blockage is reached, the second nozzle size and the second jet velocity are used as the fourth response strategy.

[0075] Develop corresponding solutions for different levels of congestion, and minimize costs while resolving the congestion problem.

[0076] In summary, this invention provides a coal feeder discharge mechanism and its control method, which includes a crushing device comprising a crushing shaft and crushing rods. A conveyor belt is connected to the crushing shaft, and multiple layers of crushing rods are fixedly connected to the crushing shaft from top to bottom, with the crushing rods perpendicular to the crushing shaft. A motor only needs to drive one crushing shaft to rotate all the crushing shafts via the conveyor belt. In this embodiment, the crushing rods on different crushing shafts are not on the same horizontal plane, thus better crushing the coal entering through the feed inlet. After crushing, the coal passes through a screen before entering the coal feeder. Coal that does not pass through the screen continues to be crushed by the crushing rods at the bottom of the crushing device until it passes through the screen.

[0077] A laser probe determines the position of the coal. If the coal position remains unchanged for an extended period, it is assumed that a blockage has occurred in the coal feeder's discharge mechanism. The blockage is then addressed by adjusting the response method. Multiple response methods are implemented to handle different blockage situations, minimizing costs while resolving the blockage. Furthermore, a humidity sensor monitors the real-time moisture content of the coal in the feeder. Based on this moisture content, the temperature of the drying device is adjusted, and the gas from the jet device is heated to dehumidify the coal, preventing blockages in the feeder's discharge mechanism caused by damp coal.

[0078] By setting up the first and second pull rods, the adjusting blades are driven to rotate along the rotating shaft, thereby adjusting the size of the nozzle orifice to further increase the pressure of the gas ejected by the jet device, better addressing the blockage problem, and saving more energy.

[0079] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present invention, and these improvements and substitutions should also be considered within the scope of protection of the present invention.

Claims

1. A coal feeder discharge mechanism, characterised in that, Including box and coal feeder, the box is provided with feed inlet above, and the box is hollow inside, and the inside is provided with crushing mechanism, the crushing mechanism below is provided with screen; The coal feeder is connected with the box through the screen, wherein the coal feeder transport cavity side is provided with discharge port, the other side away from the discharge port is provided with air jet drying device, the coal feeder pipe wall close to the discharge port is provided with multiple humidity sensors; The air jet drying device includes an air jet device, a nozzle, a drying device, and a laser probe; The drying device is arranged between the air jet device and the nozzle, and the drying device is electrically connected with the humidity sensor; The laser probe is arranged on the side of the nozzle away from the drying device, and is electrically connected with the nozzle; The control method of the coal feeder discharge mechanism, characterized in that the method comprises: Pre-set blockage level; Collecting data of humidity sensor and laser probe; According to the real-time laser probe data, the blockage level is matched; According to the real-time blockage level, the corresponding nozzle size and air jet speed are selected, and the drying device temperature is matched according to the humidity sensor data; When the pre-set blockage level is set, it includes: Set the coal feeder transport cavity into three equal parts, the cavity close to the laser probe is the proximal end, the cavity close to the discharge port is the distal end, and the cavity in the middle is the middle end; The reflection time of the laser probe irradiating the proximal end cavity is set as the first reflection time, the reflection time of the laser probe irradiating the middle end cavity is set as the second reflection time, and the reflection time of the laser probe irradiating the distal end cavity is set as the third reflection time; The first detection time and the second detection time of the laser probe are pre-set, wherein the first detection time is less than the second detection time; The first detection time and the first reflection time are set as the first blockage level; The second detection time and the first reflection time, the first detection time and the second reflection time are set as the second blockage level; The second detection time and the second reflection time, the first detection time and the third reflection time are set as the third blockage level; The second detection time and the third reflection time are set as the fourth blockage level; The first nozzle size and the second nozzle size of the nozzle are pre-set, wherein the second nozzle size is smaller than the first nozzle size; The first air jet speed and the second air jet speed of the air jet device are pre-set, wherein the first air jet speed is less than the second air jet speed; According to the blockage level, the corresponding response scheme is pre-set, wherein: When it is in the first blockage level, the first nozzle size and the first air jet speed are taken as the first response scheme; When it is in the second blockage level, the second nozzle size and the first air jet speed are taken as the second response scheme; When it is in the third blockage level, the first nozzle size and the second air jet speed are taken as the third response scheme; When it is in the fourth blockage level, the second nozzle size and the second air jet speed are taken as the fourth response scheme.

2. The coal feeder discharge mechanism of claim 1, wherein The crushing mechanism includes a conveyor belt and a crushing device, the crushing device is provided with multiple, and different crushing devices are connected by the conveyor belt and rotate synchronously.

3. A coal feeder discharge mechanism according to claim 2, wherein The crushing device includes a crushing shaft and a crushing rod, the conveyor belt is connected with the crushing shaft, the crushing shaft is fixedly connected with multiple layers of crushing rods from top to bottom, and the crushing rod is perpendicular to the crushing shaft.

4. The coal feeder discharge mechanism of claim 1, wherein, The nozzle comprises an adjusting vane, a first pull rod, a second pull rod, a rotating shaft and a fixed disc, the adjusting vane is connected with the fixed disc through the rotating shaft, the first pull rod is fixedly connected to the inner wall of the fixed disc, and the first pull rod is provided with a limiting groove matched with the second pull rod, one end of the second pull rod is electrically connected with the first pull rod, and the other end is connected with the adjusting vane.

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