Water immersion type slag salvaging machine return stroke slag-carrying early warning device and using method

Abstract

A return stroke slag carrying early warning device of a water immersion type slag salvaging machine comprises a feeding pipeline, a slag bin is arranged below the feeding pipeline, a material pouring pipeline is arranged between the tail end of the feeding pipeline and the slag bin, a feeding conveying belt is arranged in the feeding pipeline in the direction of the feeding pipeline, and a slag returning pipeline is arranged below the feeding conveying belt and is parallel to the material pouring pipeline. The slag returning pipeline is communicated with an early warning bin, a discharging pipeline communicated with the slag bin is arranged below the early warning bin, a slag discharging valve is arranged on the discharging pipeline, a material level sensor is arranged in the early warning bin, the material level sensor and the slag discharging valve are both electrically connected with the same controller, and the controller is electrically connected with an alarm device. The slag return pipeline and the early warning bin are arranged below the position, corresponding to the feeding conveying belt, of the feeding pipeline, when slag enters the early warning bin and reaches the height where the material level sensor is located, the material level sensor sends a signal to the controller, and the controller controls the holding device to give an alarm; and the phenomena of overload tripping of the submerged chain conveyor and dead pressing of the submerged chain conveyor caused by slag in the return stroke can be reduced.

Description

Technical Field

[0001] The invention relates to the technical field of slag scoop machines in thermal power plants, and in particular to a return slag warning device for a water-immersed slag scoop machine and a use method thereof. Background Art

[0002] Most of the slag scoop machines in thermal power plants now use water-immersed down-return chain transmission. The high-temperature slag falls into the slag scoop shell, and the cooling water in the shell cools the high-temperature slag, while keeping the furnace isolated from the outside. The cooled slag is driven by the slag scoop motor, driving the scraper and the round chain to move, and continuously transporting it to the slag bin outside the furnace.

[0003] When the load changes suddenly or the amount of slag increases due to poor coal quality, the slag accumulation in the slag bin of the slag remover is too high, or the flushing water of the slag remover is not normally added, the slag remover will carry slag on its return journey. Even in normal operation, part of the slag surface on the cover of the slag remover will be brought into the return journey of the slag remover and accumulate on the scraper at the tail of the slag remover. If not discovered in time, the slag remover will be overloaded and crushed to death, increasing the workload of the operating and maintenance personnel, and in severe cases, it will cause shutdown. Summary of the invention

[0004] The present invention aims to solve one of the technical problems in the related art at least to a certain extent.

[0005] To achieve the above-mentioned purpose, the present invention proposes a slag return warning device for a water-immersed slag scoop machine, comprising a slag scoop machine, a feeding pipe is arranged at the outlet of the slag scoop machine, a slag bin is arranged below the feeding pipe, a discharge pipe is arranged between the end of the feeding pipe and the slag bin, a feeding conveyor belt is arranged in the feeding pipe along the direction of the feeding pipe, a slag return pipe is arranged below the feeding conveyor belt and parallel to the discharge pipe, the slag return pipe is connected with the warning bin, a discharge pipe connected with the slag bin is arranged below the warning bin, a slag discharge valve is arranged on the discharge pipe, a material level sensor is arranged in the warning bin, the material level sensor and the slag discharge valve are electrically connected to the same controller, and the controller is electrically connected to an alarm device.

[0006] The present invention opens a slag return pipe and an early warning bin below the feeding conveyor belt corresponding to the feeding pipe. When the slag enters the early warning bin and reaches the height of the material level sensor, the material level sensor sends a signal to the controller, and the controller controls the clamping device to sound an alarm, which is convenient for staff to troubleshoot and check in time, and can reduce the occurrence of overload tripping and crushing of the slag remover caused by returning slag.

[0007] Optionally, a guide slope is arranged between the orifice of the slag return pipe and the orifice of the material discharge pipe, the orifice of the slag return pipe is arranged higher than the orifice of the material discharge pipe, and the guide slope toward one end of the material discharge pipe is lower than the material discharge slope toward one end of the slag return pipe.

[0008] Furthermore, the early warning chamber is arranged in a stepped shape that is larger at the top and smaller at the bottom, and the vertical cross-section of the early warning chamber is arranged in an inverted trapezoidal shape.

[0009] Furthermore, the material level sensors are arranged in multiple groups at different heights in the warning bin, and their setting positions include a 0m reference position and multiple groups of warning positions, the multiple groups of warning positions include at least two groups of warning positions at different heights, and the lowest warning position height should be no less than 1.5m from the bottom wall of the warning bin.

[0010] Furthermore, the multiple groups of warning positions of the material level sensor include a 1.5m warning position and a 3m warning position.

[0011] Furthermore, a pneumatic slag discharge valve is provided at the slag bin outlet, the slag discharge valve air circuit is connected to an air source, the slag discharge valve is also configured as a pneumatic valve, and the slag discharge valve is connected to the air source air circuit.

[0012] Furthermore, an observation manhole is provided on the early warning cabin, and a manhole door sealed and connected thereto can be opened at the position of the observation manhole, and the manhole door and the observation manhole are in a normally closed state.

[0013] Furthermore, the manhole door is provided with a transparent window for observing the internal situation of the early warning cabin.

[0014] Furthermore, the alarm device includes a primary warning light and a secondary warning light, and the primary warning light and the secondary warning light are set with different colors.

[0015] The present invention also provides a method for using a return slag warning device for a water-immersed slag dredger, comprising the following steps:

[0016] When the slag in the early warning bin reaches the 1.5m early warning position, the material level sensor at the 1.5m early warning position sends a signal to the controller, and the controller controls the first-level early warning light of the alarm device to issue an early warning, and controls the slag discharge valve of the early warning bin to open and perform unloading operations;

[0017] Open the slag discharge valve and reduce the speed of the slag picker at the same time. The operator conducts troubleshooting. When the slag position in the warning bin drops to the 0m reference position and the troubleshooting is completed, the controller controls the slag discharge valve to close and restores the slag picker to operation.

[0018] Furthermore, when the slag discharge valve is opened and the slag level in the warning bin continues to rise to the 3m warning level, the material level sensor at the 3m warning level sends a signal to the controller, and the controller controls the secondary warning light of the alarm device to sound an alarm;

[0019] The controller sends an emergency stop command to the slag remover. After the slag remover stops suddenly, the operating personnel promptly unload and clean the slag in the slag bin and the early warning bin, and conduct fault troubleshooting. When the slag position in the early warning bin drops to the 0m reference position and the fault troubleshooting is completed, the controller controls the slag discharge valve to close and restores the slag remover to operation.

[0020] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0022] Figure 1 It is a schematic diagram of the overall structure of a slag return warning device for a water-immersed slag dredger according to the present invention;

[0023] Figure 2 The present invention is a method flow chart of a method for using a return slag warning device for a water-immersed slag dredger according to the present invention.

[0024] Description of reference numerals:

[0025] 1. Slag scooping machine; 2. Feeding pipeline; 3. Slag bin; 4. Discharge pipeline; 41. Guide slope; 5. Feeding conveyor belt; 6. Slag return pipeline; 7. Early warning bin; 71. Material level sensor; 711. 1.5m early warning position; 712. 3m early warning position; 72. Observation manhole; 73. Manhole door; 74. Transparent window; 8. Discharge pipeline; 9. Slag discharge valve; 91. Air source; 10. Alarm device. DETAILED DESCRIPTION

[0026] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0027] The present invention proposes a return slag warning device for a water-immersed slag dredger 1, as shown below: Figure 1 Elaborate in detail.

[0028] A slag return warning device for an immersion type slag scoop machine comprises a slag scoop machine 1, a feeding pipe 2 is arranged at the outlet of the slag scoop machine 1, a slag bin 3 is arranged below the feeding pipe 2, a dumping pipe 4 is arranged between the end of the feeding pipe 2 and the slag bin 3, a feeding conveyor belt 5 is arranged in the feeding pipe 2 along the direction of the feeding pipe 2, a slag return pipe 6 is arranged below the feeding conveyor belt 5 and parallel to the dumping pipe 4, the slag return pipe 6 is connected to an early warning bin 7, a discharge pipe 8 connected to the slag bin 3 is arranged below the early warning bin 7, a slag discharge valve 9 is arranged on the discharge pipe 8, a material level sensor 71 is arranged in the early warning bin 7, the material level sensor 71 and the slag discharge valve 9 are electrically connected to the same controller, and the controller is electrically connected to an alarm device 10.

[0029] The loading conveyor belt 5 in the loading pipeline 2 transports the slag in the slag scoop machine 1 to the discharge pipeline 4, and the slag enters the slag bin 3 along the discharge pipeline 4. The slag return pipeline 6 can receive the slag carried by the loading conveyor belt 5 during the return process, as well as the slag overflowing when the slag bin 3 is full. After the slag enters the early warning bin 7 and accumulates to a certain height, it will trigger the material level sensor 71. The material level sensor 71 sends a signal to the controller, and the controller controls the alarm device 10 to sound an alarm to remind the staff that slag is carried back on the return journey. The staff performs corresponding troubleshooting and slag unloading operations, and the controller opens the slag discharge valve 9 of the early warning bin 7 while controlling the alarm device 10 to sound an alarm to avoid the situation where slag continues to accumulate in the early warning bin 7 and causes slag overflow.

[0030] The present invention opens a slag return pipe 6 and an early warning bin 7 below the feeding conveyor belt 5 corresponding to the feeding pipe 2. When the slag enters the early warning bin 7 and reaches the height of the material level sensor 71, the material level sensor 71 sends a signal to the controller, and the controller controls the clamping device to issue an alarm, which is convenient for the staff to troubleshoot and check in time, and can reduce the occurrence of overload tripping of the slag remover 1 and crushing of the slag remover 1 due to the return slag.

[0031] In some embodiments, a guide slope 41 is provided between the mouth of the return slag pipe 6 and the mouth of the dumping pipe 4, the mouth of the return slag pipe 6 is provided higher than the mouth of the dumping pipe 4, and the guide slope 41 is provided at one end of the dumping pipe 4 and lower than the dumping slope at one end of the return slag pipe 6. The setting of the guide slope 41 can strip large pieces of return slag from the feeding conveyor belt 5 and make it fall into the dumping pipe 4; and during the normal unloading process at the end of the feeding conveyor belt 5, the slag will eventually fall into the dumping pipe 4 after contacting the guide slope 41 due to collision or other reasons, thereby reducing the probability of the slag accidentally entering the return slag pipe 6 during the normal unloading process.

[0032] In some embodiments, the early warning bin 7 is configured as a terraced shape with a large top and a small bottom, and the vertical section of the early warning bin 7 is an inverted trapezoidal configuration. The inverted terraced structure can expand the internal capacity of the early warning bin 7, and the frequency of the slag in the early warning bin 7 triggering the material level sensor 71, thereby ensuring that the slag scooper 1 can be in a normal operating state most of the time, and the slag scooper 1 does not need to slow down or stop to cooperate with the early warning bin 7 and the slag bin 3 troubleshooting and unloading operations. In addition, the inverted terraced structure has an inclined surface that is inclined toward the discharge pipe 8 on the bottom wall of the early warning bin 7, which facilitates the movement of the slag toward the middle discharge pipe 8 during the downward movement of the slag.

[0033] In some embodiments, multiple groups of material level sensors 71 are arranged at different heights in the warning bin 7, and their setting positions include a 0m reference position and multiple groups of warning positions, the multiple groups of warning positions include at least two groups of warning positions at different heights, and the height of the lowest warning position should be no less than 1.5m from the bottom wall of the warning bin 7; in one embodiment, the multiple groups of warning positions of the material level sensor 71 include a 1.5m warning position 711 and a 3m warning position 712.

[0034] Setting up multiple groups of warning positions for arranging multiple groups of material level sensors 71 at different heights can provide the staff with a more intuitive judgment standard for the current return slag situation. When the slag height triggers the material level sensor 71 corresponding to the warning position with the lowest height, the controller controls the alarm device 10 to issue a first-level alarm; when the slag height triggers the material level sensor 71 corresponding to the warning position with the highest height, the controller controls the alarm device 10 to issue a second-level alarm. The staff can intuitively judge the current return slag situation based on the alarm issued by the alarm device 10, and there is a time interval between the multiple levels of alarms, which can reserve more reaction time for the staff to troubleshoot and formulate troubleshooting measures.

[0035] In some embodiments, a pneumatic slag discharge valve is provided at the outlet of the slag bin 3, and the slag discharge valve gas circuit is connected to the gas source 91. The slag discharge valve 9 is also provided as a pneumatic valve, and the slag discharge valve 9 is provided in gas circuit connection with the gas source 91. The same power source is used as the valve at the outlet of the slag bin 3, which can reduce the financial, material and human resources invested in the modification, and the pneumatic control can control the opening and closing of the slag discharge valve 9 more quickly and accurately;

[0036] In one embodiment, the slag discharge valve provided at the outlet of the slag bin 3 is hydraulically driven, and the slag discharge valve is connected to a hydraulic source control component. At this time, the slag discharge valve 9 is connected to the oil circuit of the hydraulic source control component, and the discharge gate is set as a hydraulic gate. The opening and closing of the slag discharge valve 9 is controlled by the same hydraulic source control component as the slag discharge valve.

[0037] In some embodiments, an observation manhole 72 is provided on the early warning bin 7, and a manhole door 73 can be opened and sealed at the position of the observation manhole 72, and the manhole door 73 and the observation manhole 72 are in a normally closed state. The setting of the observation manhole 72 can facilitate the staff to enter the early warning bin 7 when troubleshooting, and the staff can enter the early warning bin 7 to perform troubleshooting, maintenance and rapid unloading operations.

[0038] In some embodiments, a transparent window 74 for observing the internal situation of the early warning bin 7 is provided on the manhole door 73. When the slag in the early warning bin 7 reaches the early warning position, the operator needs to perform troubleshooting, and the transparent window 74 can facilitate the operator to observe the situation in the early warning bin 7 outside the manhole door 73.

[0039] In one embodiment, a camera assembly for monitoring the slag situation inside the warning bin 7 is suspended on the top wall of the warning bin 7, so that the staff can observe the slag situation inside the warning bin 7 through video.

[0040] In some embodiments, the alarm device 10 includes a primary warning light and a secondary warning light, and the primary warning light and the secondary warning light have different colors;

[0041] In one embodiment, the first-level warning light is set to yellow, and the second-level warning light is set to red, and when the slag material level in the warning bin 7 reaches the lowest warning position, the controller controls the first-level warning light to turn on and issue a yellow alarm; when the slag material level in the warning bin 7 reaches the highest warning position, the controller controls the second-level warning light to turn on and issue a red alarm.

[0042] In one embodiment, the alarm device 10 is configured as a CRT display for displaying the slag position. When the first-level warning light needs to work, the slag position in the CRT display is displayed in yellow. When the second-level warning light needs to work, the slag position in the CRT display is displayed in red.

[0043] The present invention also provides a method for using a return slag warning device for a water-immersed slag dredger 1, as shown below. Figure 2 Elaborate in detail.

[0044] A method for using a return slag warning device for a water-immersed slag dredger 1 comprises the following steps:

[0045] When the slag in the early warning bin 7 reaches the 1.5m early warning position 711, the material level sensor 71 located at the 1.5m early warning position 711 sends a signal to the controller, and the controller controls the first-level early warning light of the alarm device 10 to issue an early warning, and controls the slag discharge valve 9 of the early warning bin 7 to open and perform the unloading operation;

[0046] The slag discharge valve 9 is opened and the rotation speed of the slag scoop machine 1 is reduced at the same time. The operating personnel conducts troubleshooting. When the slag position in the warning bin 7 drops to the 0m reference position and the troubleshooting is completed, the controller controls the slag discharge valve 9 to close and restores the operating state of the slag scoop machine 1.

[0047] In some embodiments, when the slag discharge valve 9 is opened and the slag material position in the warning bin 7 continues to rise to the 3m warning position 712, the material level sensor 71 located at the 3m warning position 712 sends a signal to the controller, and the controller controls the secondary warning light of the alarm device 10 to sound an alarm;

[0048] The controller sends an emergency stop command to the slag scoop 1. After the slag scoop 1 stops, the operator promptly unloads and cleans the slag in the slag bin 3 and the warning bin 7, and performs troubleshooting. When the slag position in the warning bin 7 drops to the 0m reference position and the troubleshooting is completed, the controller controls the slag discharge valve 9 to close and restores the operation state of the slag scoop 1. In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0049] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0050] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0051] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0052] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0053] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A slag early warning device for a water-immersed slag dredger returning from a slag dredger, characterized in that: It includes a slag scooping machine, wherein a feeding pipe is arranged at the outlet of the slag scooping machine, a slag bin is arranged below the feeding pipe, a dumping pipe is arranged between the end of the feeding pipe and the slag bin, a feeding conveyor belt is arranged in the feeding pipe along the direction of the feeding pipe, a slag return pipe is arranged below the feeding conveyor belt and parallel to the dumping pipe, the slag return pipe is connected with an early warning bin, a discharging pipe connected with the slag bin is arranged below the early warning bin, a slag discharge valve is arranged on the discharging pipe, a material level sensor is arranged in the early warning bin, the material level sensor and the slag discharge valve are electrically connected to the same controller, and the controller is electrically connected to an alarm device.

2. The slag return warning device for a water-immersed slag dredger according to claim 1, characterized in that: A guide slope is arranged between the pipe opening of the slag return pipe and the pipe opening of the material discharge pipe. The pipe opening of the slag return pipe is arranged higher than the pipe opening of the material discharge pipe. The guide slope is arranged toward one end of the material discharge pipe lower than the material discharge slope toward one end of the slag return pipe.

3. The slag return warning device for a water-immersed slag dredger according to claim 1, characterized in that: The early warning chamber is arranged in a stepped shape that is larger at the top and smaller at the bottom, and the vertical cross-section of the early warning chamber is arranged in an inverted trapezoidal shape.

4. The slag return warning device for a water-immersed slag dredger according to claim 1, characterized in that: The material level sensors are arranged in multiple groups at different heights in the warning bin, and their setting positions include a 0m reference position and multiple groups of warning positions. The multiple groups of warning positions include at least two groups of warning positions at different heights, and the lowest warning position height should be no less than 1.5m from the bottom wall of the warning bin.

5. The slag return warning device for a water-immersed slag dredger as claimed in claim 4, characterized in that: The multiple groups of warning positions of the material level sensor include a 1.5m warning position and a 3m warning position.

6. The slag return warning device for a water-immersed slag dredger according to claim 1, characterized in that: A pneumatic slag discharge valve is arranged at the slag bin outlet, the slag discharge valve air circuit is connected with an air source, the slag discharge valve is also arranged as a pneumatic valve, and the slag discharge valve is connected with the air source air circuit.

7. The slag return warning device for a water-immersed slag dredger according to claim 1, characterized in that: An observation manhole is provided on the early warning cabin, and a manhole door can be opened and sealed at the position of the observation manhole, and the manhole door and the observation manhole are in a normally closed state.

8. The slag return warning device for a water-immersed slag dredger as claimed in claim 7, characterized in that: The manhole door is provided with a transparent window for observing the internal situation of the early warning cabin.

9. The slag return warning device for a water-immersed slag dredger according to claim 1, characterized in that: The alarm device comprises a primary warning light and a secondary warning light, and the primary warning light and the secondary warning light are set in different colors.

10. A method for using a slag warning device for a water-immersed slag dredger, characterized in that: The following steps are involved: When the slag in the early warning bin reaches the 1.5m early warning position, the material level sensor at the 1.5m early warning position sends a signal to the controller, and the controller controls the first-level early warning light of the alarm device to issue an early warning, and controls the slag discharge valve of the early warning bin to open and carry out the unloading operation; Open the slag discharge valve and reduce the speed of the slag picker at the same time. The operator conducts troubleshooting. When the slag position in the warning bin drops to the 0m reference position and the troubleshooting is completed, the controller controls the slag discharge valve to close and restores the slag picker to operation.

11. The method for using the slag warning device for the return journey of a water-immersed slag dredger according to claim 10, characterized in that: When the slag discharge valve is opened and the slag level in the warning bin continues to rise to the 3m warning position, the material level sensor at the 3m warning position sends a signal to the controller, and the controller controls the secondary warning light of the alarm device to sound an alarm; The controller sends an emergency stop command to the slag remover. After the slag remover stops suddenly, the operating personnel promptly unload and clean the slag in the slag bin and the early warning bin, and conduct fault troubleshooting. When the slag position in the early warning bin drops to the 0m reference position and the fault troubleshooting is completed, the controller controls the slag discharge valve to close and restores the slag remover to operation.

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