Coal feed amount monitoring and adjusting device for moisture of raw coal in coal bunker

Abstract

The utility model discloses a coal bunker raw coal moisture monitoring and coal feed quantity adjusting device which can effectively detect and analyze the moisture of raw coal in a buffer coal bunker, judge the position of water and coal through feedback signals of different sensors, and effectively adjust the coal feed quantity through double means of reminding field operators and intervening a loading program in advance. The control over water and coal in the quantitative loading process is effectively achieved, safety accidents caused by overweight loading are avoided, and safe and stable operation of the elevator is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of material transportation, in particular to a device for monitoring the moisture content of raw coal in a coal bunker and regulating the amount of coal fed. Background Art

[0002] As the main link in underground raw coal transportation, coal bunkers can effectively alleviate the pressure during peak coal transportation and are widely used in various mine production. The main shaft loading system of Changcun Coal Mine is equipped with a buffer coal bunker with a capacity of 450 tons. The gate and conveyor cooperate to complete quantitative loading, and the raw coal lifting task is achieved through double skip lifting. The quantitative loading process is controlled by the main control PLC. When the main control PLC collects the full coal level signal from the weighing system, it issues an instruction to close the gate and stop the conveyor to complete the quantitative loading. In order to avoid the problem of overweight loading caused by weighing system failure, the main control PLC sets two redundant instructions: the head coal level signal and the gate closing time. As long as any of the conditions is met, the main control PLC will issue an instruction to close the gate and stop the conveyor to prevent overweight.

[0003] However, in actual operation, it was found that when the moisture content of the raw coal in the buffer coal bunker was too high (commonly known as water coal), the three quantitative loading procedures could not effectively guarantee the quantitative loading, resulting in overload. In this case, the excessive coal loading caused the hoist to overload or break the rope, thereby affecting the safe operation of the hoist and even causing accidents that seriously affected coal production.

[0004] At present, the detection of water-coal problems in coal bunkers mainly relies on manual observation to determine whether there is water-coal in the coal bunker. In order to solve the water-coal problem, a mechanical gate is usually installed at the coal bunker discharge port. When water-coal is found manually, the mechanical gate is closed in time. However, this method has problems in actual operation: manual judgment of the occurrence of water-coal is inaccurate and the reaction is slow. The main task of on-site operators is to operate the equipment. Due to human negligence or paralysis, even if water-coal is present, workers often fail to discover it in time, resulting in serious casualties and equipment damage. Utility Model Content

[0005] The purpose of the utility model is to provide a device for monitoring the moisture content of raw coal in a coal bunker and adjusting the coal feeding amount, with the purpose of monitoring the moisture content of raw coal in a buffer coal bunker in real time. When the moisture content of the raw coal is too high, the quantitative loading signal is intervened in advance to prevent overweight, which can effectively solve the problems in the technical background.

[0006] To achieve the above purpose, the utility model provides the following technical solutions: a device for monitoring the moisture content of raw coal in a coal bunker and adjusting the amount of coal fed, comprising a buffer coal bunker, an upper moisture sensor, a middle moisture sensor, a lower moisture sensor, and a protective device installed on the outside of the sensor.

[0007] Water-coal monitoring PLC control board, PLC main control board, buzzer and indicator light, the upper moisture sensor is installed at the feed port, the middle moisture sensor is installed on the middle section of the buffer coal bunker transmission stroke, and the lower moisture sensor is installed on the discharge port transmission rack, which are in contact with the coal respectively. The sensors are connected to the input end of the water-coal monitoring PLC control board input module to send signals to the water-coal monitoring PLC control board; the indicator light, buzzer and PLC main control board are connected to the output end of the water-coal monitoring PLC control board output module to execute the instructions issued by the water-coal monitoring PLC control board.

[0008] The protection device includes a protection cover, a protection top plate, a support rod, a fixed ring, and a coal separator. The top of the protection cover is fixedly connected to the protection top plate, which is composed of several honeycomb protection blocks. Several support rods are evenly distributed at angles on the inner wall of the protection cover. The other end of the support rod extends toward the center of the circle, and the top of the extended part is fixedly connected to the fixed ring. A sensor is inserted in the fixed ring. A fixing rod is connected to the outer side of the circumference of the protection cover. The top of the fixing rod is fixedly connected to a baffle. The baffle is set at an angle. The front section of the baffle is provided with a coal separator, and a shock-absorbing ring is provided between the coal separator and the baffle.

[0009] Preferably, the shock-absorbing ring is formed by welding a plurality of U-shaped retaining springs, one end of the shock-absorbing ring abuts against the baffle, and the other end abuts against the coal distribution plate.

[0010] Preferably, the coal distribution plate is arranged obliquely, and its transverse end extends upward along the oblique line to ensure that the coal does not fall onto the protective cover.

[0011] Preferably, the protective block is a hexagonal honeycomb protective block, and three connecting grooves are evenly opened on the protective block. A connecting block is fixedly connected between every two connecting grooves, and the connecting block slides into the connecting groove of another protective block. A reset spring is provided between the connecting block and the bottom end of the connecting groove to reduce the impact on the protective top plate when the object falls.

[0012] Preferably, the height of the connecting block is smaller than the height of the connecting groove, so as to leave a buffer space when alleviating impact.

[0013] Preferably, the output module of the water-coal monitoring PLC is connected to the input module of the PLC main control board.

[0014] Preferably, the PLC main control board is provided with a water-coal control program.

[0015] Preferably, the output end of the PLC main control board output module is connected to the gate closing device.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] 1. By setting moisture sensors at the feed port, mid-stroke section and discharge port, and allowing them to directly contact the coal, the moisture changes of the coal during the entire loading process can be fully monitored. The sensor at the feed port can detect the moisture content of the original coal, the sensor in the mid-stroke section can monitor whether there is any moisture change in the coal during transportation, and the sensor at the discharge port can detect the moisture content of the finally loaded coal. This multi-point detection can provide more accurate and comprehensive data, which helps to detect water-coal problems in a timely manner. In addition, installing the sensor on the coal travel path can realize fast and real-time monitoring of the moisture in the coal, avoiding the data delay problem that may be caused by installation behind the wall. It can effectively detect and analyze the moisture content of the raw coal in the buffer coal bin, and judge the position of the water-coal through the feedback signals of different sensors. By reminding the on-site operators and intervening in the loading program in advance, it effectively realizes the control of water-coal in the quantitative loading process, avoids safety accidents caused by overweight loading, and ensures the safe and stable operation of the elevator.

[0018] 2. A protective device is also set up. The sensor is placed in the protective cover and fixed by a support rod and a fixing ring. The outer circumference of the protective cover is provided with a baffle and a coal separator. At the same time, the shock-absorbing ring reduces the impact of coal on the coal separator. The top plate is composed of protective blocks. The height of the connecting block is less than the height of the connecting groove. The bottom end is supported by a reset spring to keep it horizontal, which increases the protective effect of the top plate when materials splash.

[0019] A device for monitoring the moisture content of raw coal in a coal bunker and adjusting the amount of coal fed into the coal bunker has the following working process:

[0020] 1. After receiving the signal from the upper moisture sensor, the water-coal monitoring PLC control panel sends a command to the indicator light, which lights up, indicating that there is too much moisture in the raw coal;

[0021] 2. After the water-coal monitoring PLC control board receives the signal from the middle moisture sensor, it retains the signal without any other prompts;

[0022] 3. After the water-coal monitoring PLC control board receives the signal from the lower moisture sensor, it calculates the time from receiving the middle moisture sensor signal to receiving the lower sensor signal. When the time is less than the normal coal discharge time from the middle section to the lower mouth of the buffer coal bin, it sends instructions to the buzzer and the PLC main control board. The buzzer sounds an alarm to indicate that the moisture content in the raw coal is too high. At the same time, the PLC main control board starts the water-coal discharge control program, and the water-coal discharge control program completes the instructions to close the gate and stop the conveyor operation.

[0023] 4. When overweight still occurs after loading is completed through the water-coal release control command, the main shaft hook worker on site can complete the loading in batches through manual operation to effectively avoid the occurrence of overweight loading. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the system for monitoring the moisture content of raw coal in the coal bunker and adjusting the coal supply quantity.

[0025] Figure 2 It is a schematic diagram of the overall structure of the utility model.

[0026] Figure 3 This is a schematic diagram of the structure of the shock-absorbing ring of the present utility model.

[0027] Figure 4 This is a schematic diagram of the structure in which the fixing ring, support rod and sensor cooperate with each other in the utility model.

[0028] Figure 5 This is a schematic diagram of the structure in which the connecting blocks and connecting grooves of the protective top plate of the present invention cooperate with each other.

[0029] In the figure: 1. Protective cover; 2. Protective top plate; 201. Connecting block; 202. Connecting groove; 3. Baffle; 4. Fixing ring; 5. Coal separator; 6. Shock-absorbing ring; 7. Support rod. DETAILED DESCRIPTION

[0030] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0031] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," "the other end," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0032] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "provided with," "connected," etc. should be understood in a broad sense. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be internal communication between two components. Those skilled in the art will be able to understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0033] 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 embodiments described 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 making creative efforts are within the scope of protection of the present invention.

[0034] Example 1: Please refer to Figure 1 The utility model provides an embodiment of a device for monitoring the moisture content of raw coal in a coal bunker and adjusting the amount of coal fed, including a buffer coal bunker, characterized in that it includes an upper moisture sensor, a middle moisture sensor, a lower moisture sensor, and a protective device installed on the outside of the sensor.

[0035] The water-coal monitoring PLC control board, PLC main control board, buzzer and indicator light, upper moisture sensor, installed at the feed port, middle moisture sensor, installed on the middle section of the buffer coal bunker transmission stroke, lower moisture sensor, installed on the discharge port transmission rack, are in contact with the coal respectively, and their sensors are connected to the input end of the water-coal monitoring PLC control board input module to send signals to the water-coal monitoring PLC control board; the indicator light, buzzer and PLC main control board are connected to the output end of the water-coal monitoring PLC control board output module to execute the instructions issued by the water-coal monitoring PLC control board, and the output module of the water-coal monitoring PLC is connected to the input module of the PLC main control board.

[0036] The PLC main control board is equipped with a water-coal control program.

[0037] The output end of the output module of the PLC main control board is connected to the gate closing device.

[0038] The sensors are set at the discharge port, feed port, and the middle of the journey, in direct contact with the coal, and not installed on the wall, which will not cause a certain delay in the data detected by the sensor. The coal has traveled a certain distance before entering the storage, and the moisture content has changed, which makes the alarm inaccurate. This design can achieve real-time monitoring of the moisture content of the coal at different stages. This can fully understand the changes in the moisture content of the coal and help to accurately control the moisture content of the coal. The sensor sends the moisture data collected in real time to the input module of the water-coal monitoring PLC control board. The PLC control board can analyze and process this data. The feedback mechanism enables the system to quickly respond to changes in the moisture content of the coal and make timely adjustments and controls to ensure that the quality of the coal meets the requirements. After integrating the moisture monitoring system, the moisture content of the coal can be controlled more accurately, thereby improving production efficiency and quality control levels. Timely feedback and automated control help reduce waste and loss in the coal processing process and optimize the production process.

[0039] like Figure 1 As shown, the coal moisture monitoring and coal feeding amount adjustment device of the utility model has the following working process:

[0040] When the upper moisture sensor in the buffer coal bin senses that the moisture content in the raw coal is too high, the upper moisture sensor sends a signal. After the water-coal monitoring PLC control board receives the signal from the upper moisture sensor, it sends a command to the indicator light. The indicator light lights up, prompting the main well hook worker that there is too much moisture in the raw coal in the buffer coal bin.

[0041] When the middle moisture sensor in the buffer coal bin senses that the moisture content in the raw coal is too high, the middle moisture sensor sends a signal. After the water-coal monitoring PLC control board receives the signal from the middle moisture sensor, it retains the signal without any other prompts.

[0042] When the moisture sensor at the lower mouth of the buffer coal bin senses that the moisture content in the raw coal is too high, the moisture sensor at the lower mouth sends a signal. After the water-coal monitoring PLC control board receives the signal from the moisture sensor at the lower mouth, it calculates the time from receiving the signal from the middle moisture sensor to receiving the signal from the lower mouth sensor. When the time is less than the normal coal discharge time from the middle section to the lower mouth of the buffer coal bin, it sends a command to the buzzer and the PLC main control board. The buzzer sounds an alarm to remind the main well hook worker that the moisture content in the raw coal is too high. At the same time, the PLC main control board starts the water-coal discharge control program, and the water-coal discharge control program completes the instructions to close the gate and stop the conveyor operation.

[0043] When overweight still occurs after loading is completed through the water-coal release control command, the main shaft hook worker on site can complete the loading in batches through manual operation, effectively avoiding the occurrence of overweight loading.

[0044] Example 2: Please refer to Figure 2-5 , based on Example 1, further comprising the following structure:

[0045] The protection device includes a protection cover 1, an overall cylindrical structure for covering and protecting the internal sensor, a protection top plate 2, a structure installed on the top of the protection cover 1, which is composed of honeycomb protection blocks to provide an additional protection layer, a support rod 7, a fixing ring 4, and a coal dividing plate 5. The top of the protection cover 1 is fixedly connected with a protection top plate 2, which is composed of several honeycomb protection blocks. There are several support rods 7 evenly distributed at angles on the inner wall of the protection cover 1. The other end of the support rod 7 extends toward the center of the circle, and a fixing ring 4 is fixedly connected to the top of the extension part. The fixing ring 4 is used to install and fix the position of the sensor to ensure that the sensor maintains a stable and accurate position during operation. The sensor is inserted into the fixing ring 4, and the monitoring end of the sensor is in direct contact with the coal to conduct To monitor the moisture in the coal, a fixing rod is connected to the outer side of the circumference of the protective cover 1, and the fixing rod is connected to the baffle 3 to ensure that the baffle 3 and the protective cover 1 are installed as a whole. The top of the fixing rod is fixedly connected to the baffle 3, and the baffle 3 is set at an angle to support the coal dividing plate 5. The front section of the baffle 3 is provided with a coal dividing plate 5 to guide and divert the flow of materials in the coal bin to avoid blockage or confusion. At the same time, it can play a role of separation and protection, further separate and guide the flow of materials, and ensure the uniform distribution and fluidity of the coal. A shock-absorbing ring 6 is provided between the coal dividing plate 5 and the baffle 3, which is installed between the coal dividing plate 5 and the baffle 3 to reduce vibration and impact transmission, protect the coal dividing plate 5 and the baffle 3 from external vibration or impact, and increase the stability and life of the equipment.

[0046] The shock-absorbing ring 6 is welded by a number of U-shaped retaining springs. One end of the shock-absorbing ring 6 abuts against the baffle 3, and the other end abuts against the coal distribution plate 5.

[0047] The coal distributor 5 is arranged obliquely, and its transverse end extends upward along the oblique line, so as to ensure that the coal does not fall onto the protective cover 1. The oblique arrangement of the coal distributor 5 and the upward extension of the transverse end effectively prevent the coal from falling directly onto the protective cover 1, thereby avoiding damage or accumulation of the protective cover 1 by the coal, and improving the effectiveness and life of the protective cover 1. The oblique arrangement of the coal distributor 5 helps to optimize the flow path and distribution of the coal, improve the efficiency of loading and transportation, and make it easier for the coal to run along the predetermined path and speed during movement, thereby reducing the occurrence of blockage or other transportation problems.

[0048] The protective block is a hexagonal honeycomb-shaped protective block. Three connecting grooves 202 are evenly opened on the protective block. A connecting block 201 is fixedly connected between each two connecting grooves 202. The connecting block 201 slides into the connecting groove 202 of another protective block. A return spring is provided between the connecting block 201 and the bottom end of the connecting groove 202 to reduce the impact on the protective top plate 2 when an object falls.

[0049] A return spring is provided between the connecting block 201 and the connecting slot 202, which can effectively reduce the impact force on the protective top plate 2 when an object falls. This design can absorb and disperse energy when an object hits, thereby protecting the top plate 2 from excessive force and extending the life of the protective structure. The connecting block 201 can be slidably fitted into the connecting slot 202 of another protective block. This structural design makes the entire protective system flexible and adaptable. It can better cope with impact forces from different angles and directions without being damaged by the rigid fixed structure.

[0050] The height of the connecting block 201 is smaller than the height of the connecting groove 202, which is used to leave a buffer space when mitigating impact. The height of the connecting block 201 is smaller than the height of the connecting groove 202, which means that a certain buffer space is left when mitigating impact. This design can effectively reduce the risk of damage and enhance safety even under extreme conditions, such as accidental impact or falling objects.

[0051] During use, the sensor is placed within the retaining ring 4 within the protective cover 1. The protective top plate 2 is then assembled, and the baffle 3 is installed on the coal distributor 5. Coal is then allowed to flow. When the coal impacts the coal distributor 5, the U-shaped retaining spring of the shock-absorbing ring 6 is squeezed, thereby reducing the impact. When the material splashes, the height of the connecting block 201 is less than that of the connecting groove 202, which means that a certain buffer space is left to mitigate the impact. This design ensures that even under extreme conditions, such as accidental impact or falling objects, the risk of damage can be effectively reduced, enhancing safety.

[0052] The above is only an embodiment of the present invention, and common knowledge such as the specific structure and characteristics of the scheme are not described in detail here. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is limited by the appended claims rather than the above description, and it is intended that all changes that fall within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any figure mark in the claims should not be regarded as limiting the claim involved.

Claims

1. A device for monitoring the moisture content of raw coal in a coal bunker and adjusting the amount of coal fed, including a buffer coal bunker, characterized in that: It includes upper moisture sensor, middle moisture sensor, lower moisture sensor and protective device installed on the outside of the sensor. Water-coal monitoring PLC control board, PLC main control board, buzzer and indicator light, the upper moisture sensor is installed at the feed port, the middle moisture sensor is installed on the middle section of the buffer coal bunker transmission stroke, and the lower moisture sensor is installed on the discharge port transmission rack, which are in contact with the coal respectively. The sensors are connected to the input end of the water-coal monitoring PLC control board input module to send signals to the water-coal monitoring PLC control board; the indicator light, buzzer and PLC main control board are connected to the output end of the water-coal monitoring PLC control board output module to execute the instructions issued by the water-coal monitoring PLC control board. The protection device comprises a protection cover (1), a protection top plate (2), a support rod (7), a fixed ring (4), and a coal separator (5). The top of the protection cover (1) is fixedly connected to the protection top plate (2), and the protection top plate (2) is composed of a plurality of honeycomb protection blocks. A plurality of support rods (7) are evenly distributed at an angle on the inner wall of the protection cover (1). The other end of the support rod (7) extends toward the center of the circle, and the top of the extended portion is fixedly connected to the fixed ring (4). A sensor is inserted into the fixed ring (4). The outer side of the circumference of the protection cover (1) is connected to a fixed rod. The top of the fixed rod is fixedly connected to a baffle (3). The baffle (3) is set at an angle. The front section of the baffle (3) is provided with a coal separator (5), and a shock-absorbing ring (6) is provided between the coal separator (5) and the baffle (3).

2. The device for monitoring the moisture content of raw coal in a coal bunker and adjusting the amount of coal fed according to claim 1 is characterized in that: The shock-absorbing ring (6) is formed by welding a plurality of U-shaped retaining springs. One end of the shock-absorbing ring (6) abuts against the baffle (3), and the other end abuts against the coal distribution plate (5).

3. The device for monitoring the moisture content of raw coal in a coal bunker and adjusting the amount of coal fed according to claim 2 is characterized in that: The coal distribution plate (5) is arranged obliquely, and its transverse end extends upward along the oblique line, so as to ensure that the coal does not fall onto the protective cover (1).

4. The device for monitoring the moisture content of raw coal in a coal bunker and adjusting the amount of coal fed according to claim 1 is characterized in that: The protective block is a hexagonal honeycomb-shaped protective block, and three connecting grooves (202) are evenly arranged on the protective block at an angle. A connecting block (201) is fixedly connected between each two connecting grooves (202), and the connecting block (201) is slidably fitted in the connecting groove (202) of another protective block. A return spring is provided between the connecting block (201) and the bottom end of the connecting groove (202) to reduce the impact of an object on the protective top plate (2) when it falls.

5. The device for monitoring the moisture content of raw coal in a coal bunker and adjusting the amount of coal fed according to claim 4 is characterized in that: The height of the connecting block (201) is smaller than the height of the connecting groove (202), and is used to leave a buffer space when alleviating impact.

6. The device for monitoring the moisture content of raw coal in a coal bunker and adjusting the amount of coal fed according to claim 1 is characterized in that: The output module of the water-coal monitoring PLC is connected to the input module of the PLC main control board.

7. The device for monitoring the moisture content of raw coal in a coal bunker and adjusting the amount of coal fed according to claim 1 is characterized in that: The output end of the PLC main control board output module is connected to the gate closing device.

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