CN108423326B - Coal breakage pipe anti-blocking device - Google Patents
Coal breakage pipe anti-blocking device Download PDFInfo
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- CN108423326B CN108423326B CN201810198259.XA CN201810198259A CN108423326B CN 108423326 B CN108423326 B CN 108423326B CN 201810198259 A CN201810198259 A CN 201810198259A CN 108423326 B CN108423326 B CN 108423326B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D88/00—Large containers
- B65D88/54—Large containers characterised by means facilitating filling or emptying
- B65D88/64—Large containers characterised by means facilitating filling or emptying preventing bridge formation
- B65D88/70—Large containers characterised by means facilitating filling or emptying preventing bridge formation using fluid jets
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Abstract
The invention provides a coal dropping pipe anti-blocking device, which comprises: the water way is used for pressurizing and flushing the coal dropping pipe, the front end of the water way is provided with a nozzle, and the nozzle is arranged in a rotating and/or translating way relative to the coal dropping pipe so as to enable the nozzle to at least partially act on the coal powder in the coal dropping pipe; the swinging mechanism comprises an installation cover and at least one group of driving parts, the installation cover is fixed on the coal dropping pipe, and the nozzle is movably arranged on the installation cover; the nozzle rotates and/or translates under the action of the driving part to drive the nozzle to flush the coal powder accumulated in the coal dropping pipe, so that the coal powder falls off. The invention has convenient operation and maintenance, uses water resources pertinently and greatly saves the water consumption; the time required by on-site polling personnel and dredging the blockage of the coal dropping pipe is reduced, the times and time required by shutdown are reduced, and the production efficiency is improved; the swinging device can not cause mechanical damage to the coal dropping pipe, the damage degree to the coal dropping pipe is reduced, and the service life of the coal dropping pipe is greatly prolonged.
Description
Technical Field
The invention relates to an anti-blocking device for a coal dropping pipe.
Background
The coal dropping pipe is an important passage connected with a coal conveying belt material line and consists of a material hopper, a three-way baffle, an inclined through pipe, an air lock and the like. The important factor causing coal blockage of the coal dropping pipe is that coal is attached to the pipe wall, and the part which is easy to generate the attached collection is positioned at the joint of the three-way baffle plate and the inclined through pipe and dead angles of the bottom surfaces of two sides of the inclined through pipe.
The coal blockage phenomenon is mainly concentrated on the joint part of the three-way baffle and the inclined through pipe, particularly the upper part of the inclined through pipe, through repeated observation and analysis of the coal blockage phenomenon.
One of the reasons is that: the main factors that tend to agglomerate for coal passing through the feed are water and particle size; the dry coal with low moisture content has low viscosity and is not easy to be attached. The conveying inertia with large water content is large, the fluidity is strong, the caking is not easy, and the caking is easy when the water content of the coal is 10 to 15 percent; coal with such humidity is easily produced in the case of rain. Therefore, for the coal conveying system of the south power plant in rainy seasons, the coal conveying blockage in rainy seasons is a great factor influencing the production efficiency. Most of pipelines used in the coal conveying channel are made of common carbon steel, the content of the pipe wall is easy to corrode, rust and rough in surface, so that coal dust is accumulated on the surface, particularly when the humidity of coal is 10% -15%, the coal dust is easy to bond on the wall of the pipeline, the resistance of the inner wall of the pipeline is increased, and instantaneous expansion and collection can be generated when the quantity of the coal is slightly large, so that the problems of blockage and adhesion are caused.
The second reason is that: coal particles are also a cause of clogging. Experience shows that the blocky coal is not easy to block because the blocky coal has large inertia and large momentum during conveying, and the coal with the granularity of 5-50 um and certain humidity is easy to agglomerate on the pipe wall, thereby reducing the blocking of the section of the coal passing through the pipeline.
The existing pipelines present problems in structure and design. The inclined angle of the inclined pipe and the three-way baffle is too small, so that the pulverized coal is accumulated and is not easy to slide down, thereby generating blockage. Dead corners on the bottom surfaces of two sides of the inclined through pipe are easy to hang coal and agglomerate for a long time, so that the effective space of the pipe is reduced, a bottleneck bayonet is generated, and the blockage is easy to occur when the coal quantity is increased, as shown in the attached drawing 1; the prior scheme for preventing the coal dropping pipe from being blocked mainly has the following defects:
1. the blockage of the coal dropping pipe is cleaned by manpower frequently, which wastes labor and time and has high labor intensity.
2. High-molecular wear-resistant or stainless steel plate linings are laid on the inner walls of the inclined pipe, the three-way baffle and the like to reduce the adhesion and bonding of the pulverized coal. But the cost is too high, the replacement is difficult, and the flow section of the pipeline is reduced.
3. A rapping motor is arranged near the outer wall of the three-way baffle and the outer wall of the inclined pipe or the straight pipe, the coal is vibrated by mechanical vibration, but because a plurality of parts of the rapping motor are fixedly connected, the rapping motor can only rap one side of the pipeline, the rapping amplitude and the rapping depth of the rapping motor are limited, the effect is not obvious, and the long-term vibration of the vibrating motor is easy to damage, so that the maintenance amount is increased for maintenance personnel.
4. The coal conveying pipeline is changed into a stainless steel material, although the viscosity is reduced, the modification work amount is large, and the cost is high.
Therefore, how to provide the coal dropping pipe anti-blocking device which is convenient to operate and maintain and beneficial to reducing the times and time required by shutdown so as to improve the production efficiency becomes a problem to be solved in the industry.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides the anti-blocking device for the coal dropping pipe, which has the advantages of simple operation, convenient maintenance, high automation degree and production efficiency improvement; the mechanical damage to the coal dropping pipe is avoided, the damage degree to the coal dropping pipe is reduced, and the service life of the coal dropping pipe is greatly prolonged.
In order to achieve the above object, the present invention provides an anti-blocking device for a coal dropping pipe, comprising:
the water way is used for pressurizing and flushing the coal dropping pipe, the front end of the water way is provided with a nozzle, and the nozzle is arranged in a rotating and/or translating way relative to the coal dropping pipe so as to enable the nozzle to at least partially act on the coal powder in the coal dropping pipe;
the swinging mechanism comprises an installation cover and at least one group of driving parts, the installation cover is fixed on the coal dropping pipe, and the nozzle is movably arranged on the installation cover;
the nozzle rotates and/or translates under the action of the driving part to drive the nozzle to flush the coal powder accumulated in the coal dropping pipe, so that the coal powder falls off.
The invention adopts the nozzle with adjustable position state to flush the coal dust accumulated in the coal chute, so as to thoroughly solve the problem of coal blockage of the coal chute; through the rotation and/or translation motion of nozzle, increase the area of directly penetrating of nozzle, realize washing by water to the accumulational buggy of different positions, make accumulational buggy drop from the coal breakage pipe.
According to another embodiment of the present invention, the swing mechanism further comprises a carrier plate, the carrier plate is rotatably connected to the mounting cover; the mounting cover is provided with a lower through hole communicated with the interior of the coal dropping pipe, the support plate is provided with an upper through hole, and water injected by the nozzle can directly act on the accumulated coal powder in the coal dropping pipe in the rotating process of the nozzle. In the scheme, the nozzle can be a fan-shaped nozzle or a liquid injection nozzle; wherein, the water spraying coverage area of the fan-shaped nozzle is large, and the impact strength is moderate; the impact force of the liquid injection nozzle is large, and the water spraying coverage area is moderate; preferably, two groups of nozzles can be arranged for alternate use and simultaneous use, or can be selected for use according to different industrial and mining industries, so that the coal blockage phenomenon of the coal breakage pipe is thoroughly solved.
According to another specific embodiment of the present invention, a first rotating shaft is disposed between the support plate and the mounting cover, the driving component includes a side-turning motor and a first driving rod, the first driving rod is connected to the support plate, and the side-turning motor drives the first driving rod to move, so that the support plate turns on its side around the first rotating shaft. For example, the first rotation axis is arranged in the Y-axis direction. In this scheme, the motor of turning on one's side is fixed relative to the support plate, for example the motor cabinet, rotate between the stiff end of first actuating lever and the installation cover and be connected, the motor action of turning on one's side can change the distance between the fixing base of motor cabinet and first actuating lever to realize the support plate and establish the position of nozzle on the support plate, first actuating lever for example rack (do not have the lug connection between first actuating lever and the support plate) or telescopic link.
According to another embodiment of the invention, the carrier plate is provided with a nozzle support, and the nozzle is connected with the nozzle support in a rotating and/or sliding manner, so that the nozzle can more fully flush the coal dust accumulated in the coal dropping pipe. In this scheme, rotate to connect and can select modes such as rolling bearing support, sliding connection can select modes such as rack and pinion.
According to another specific embodiment of the present invention, a second rotating shaft is disposed between the nozzle and the nozzle support, the driving component includes a rotating motor and a second driving rod, the second driving rod is connected to the nozzle in a driving manner, and the rotating motor rotates to drive the second driving rod to move, so that the nozzle rotates around the second rotating shaft relative to the nozzle support. For example, the second rotating shaft is arranged along the X direction, and the first rotating shaft and the second rotating shaft are vertically arranged and can be matched with each other to enable the nozzle to generate a larger coverage area; in this scheme, the second actuating lever can be telescopic actuating lever, through stretching out, the withdrawal of second actuating lever, realizes that the nozzle carries out reciprocating swing back and forth around the second pivot.
According to another embodiment of the invention, the coal dropping pipe is provided with a monitoring mechanism to monitor the blockage condition in the coal dropping pipe, and the monitoring mechanism comprises at least one group of visual sensors. Through setting up visual sensor, information such as the position of stifled coal in the monitoring coal breakage pipe, stifled image of media conveniently adjust the position of nozzle and the impact force of nozzle water spray, are favorable to raising the efficiency. For example, two groups of visual sensors are arranged, wherein the corresponding blocking media amount of one group is a, and at the moment, the situation that the blocking media is light is adopted, personnel are reminded of paying attention to the blocking media situation, or dredging and flushing are carried out according to the production situation; in this case, dredging can be completed only by low-pressure water (adopting a fan-shaped nozzle), and an anti-blocking effect is achieved; since there is a possibility that the accumulated pulverized coal is carried to the piping by the flowing coal during the coal transportation, there is no need to immediately stop the process. The blocking quantity of the other group is b, and the situation of the serious blocking at this time is that the pipeline is completely blocked possibly, and the dredging treatment needs to be carried out immediately; in this case, water under a high pressure is required for flushing (using a liquid injection nozzle), and drainage is required immediately. And the visual sensor is arranged, so that the automatic control is facilitated.
According to another specific embodiment of the invention, the anti-blocking device for the coal dropping pipe is provided with a control module, the control module comprises a controller and a flushing electromagnetic valve, and the controller acquires data of a visual sensor to control the opening or closing of the flushing electromagnetic valve. In the scheme, the controller can select a PLC (programmable logic controller) and is matched with the touch screen to display the on-site material blocking condition in real time; during the maintenance time of the equipment, the maintenance treatment can be carried out through manual control. Correspondingly, the control end can be centralized to the remote terminal, a plurality of different substation PLC controllers can be remotely controlled, the utilization rate of personnel is improved, and the labor cost is saved.
According to another embodiment of the invention, a water pump is arranged at the tail end of the water path, and the control module controls the water pump to be turned on or off so as to finish the flushing process of the nozzle on the coal powder accumulated in the coal dropping pipe. In this scheme, the output of water pump can be adjusted as required to obtain the water of different pressures, and the controller sets for the output of water pump according to the stifled medium condition of difference.
According to another embodiment of the invention, the end of the water pump is provided with a self-contained water tank provided with an automatic water replenishing mechanism. A water adding electromagnetic valve is arranged at the tail end of the water tank, and an upper liquid level switch and a lower liquid level switch for monitoring the water level are arranged in the water tank; the upper liquid level switch and the lower liquid level switch are electrically connected with the controller. In the scheme, whether the water in the water tank is filled is monitored through the upper liquid level switch, and when the upper liquid level switch triggers time, the water filling operation is stopped; and when the upper liquid level switch is not triggered, performing water injection operation. When the lower liquid level switch is triggered, the water pump cannot be started, the water level in the water tank is indicated to be too low at the moment, and when the lower liquid level switch is not triggered, the water pump can be started to flush the water.
According to another embodiment of the invention, an overflow sensor is further arranged in the water tank, and the overflow sensor is arranged to ensure the stability of the pressure in the water path and avoid the situation that the water pump works and the water level of the water tank is not enough so that the water pressure sprayed from the nozzle cannot reach the required pressure. When the water supply speed in the water tank is lower than the water outlet speed, after flushing operation is continuously carried out for a period of time, the overflow sensor sends a trigger signal, the controller can adjust the water outlet pressure until the water pump stops, and after water is supplemented first, the flushing process is carried out.
According to another specific embodiment of the invention, the coal dropping pipe anti-blocking device further comprises a limit sensor for detecting the water spraying position of the nozzle. For example, an origin position sensor is arranged on the mounting cover to detect whether the carrier plate returns to contact with the mounting cover; the mounting cover is provided with a sensor for the maximum position of turnover, and when the sensor is effective, the support plate turns over to the extreme position and cannot turn over. The first sensor and the second sensor are arranged on the nozzle support, the nozzle can only swing between the effective positions of the first sensor and the second sensor, and water sprayed from the nozzle can effectively and directly act on accumulated coal dust in the coal dropping pipe to enable the coal dust to fall off.
The invention integrates monitoring technology, water path control, a swing mechanism and automatic control, processes monitored data through a sensor, a liquid level switch, a limit switch and the like, sends the processed data to an automatic controller, carries out automatic water tank water adding, water pump pressurization, water pump stopping and starting, swing mechanism action and the like, monitors the liquid level of a water tank, the coal blockage condition of a coal dropping pipe, the working states of a water pump, a plurality of electromagnetic valves and a swing device in real time, automatically records alarm information, saves the alarm information, refers to historical alarm data at any time, realizes full-automatic control, and thoroughly solves the coal blockage phenomenon of the coal dropping pipe.
Compared with the prior art, the invention has the advantages that:
1. the operation and the maintenance are convenient, the water resource is used in a targeted manner, and the water consumption is greatly saved;
2. the time required by on-site polling personnel and dredging the blockage of the coal dropping pipe is greatly reduced, the times and time required by shutdown are reduced, and the production efficiency is improved;
3. the swinging device can not cause mechanical damage to the coal dropping pipe, the damage degree to the coal dropping pipe is reduced, and the service life of the coal dropping pipe is greatly prolonged.
The present invention will be described in further detail with reference to the accompanying drawings.
Drawings
FIG. 1 is a diagram illustrating the formation of coal blockage in a coal dropping pipe in the prior art;
FIG. 2 is a schematic view showing the overall structure of the coal dropping pipe anti-clogging device of example 1;
FIG. 3 is a schematic view of the condition monitoring of the putty in FIG. 2;
FIG. 4 is a schematic view of the overall structure of the swing apparatus;
FIG. 5 is a schematic view of another state of the rocking device;
fig. 6 is a schematic diagram of the control principle in fig. 2.
Detailed Description
Example 1
This embodiment provides a coal breakage pipe anti-blocking device, as shown in fig. 2-6, it includes: coal dropping pipe 1, water path 2, swinging device 3 and nozzle 4.
The swing device 3 comprises a mounting cover 31, a carrier plate 32, a nozzle support 33, a rollover motor 34, a first driving rod 35, a rotating motor 36 and a second driving rod 37; the mounting cover 31 is arranged outside the coal chute 1, and the carrier plate 32 is rotatably connected with the upper surface of the mounting cover 31 through a first rotating shaft (not shown); the mounting cover 31 is provided with a lower through hole 311 communicated with the interior of the coal chute 1, the support plate 32 is provided with an upper through hole 321, and the upper through hole 321 and the lower through hole 311 can always ensure that water sprayed from the nozzle 4 is directly sprayed to the coal blockage area 6 through a water injection hole (not shown) in the coal chute 1 in the water spraying process of the nozzle 4.
The support plate 32 is provided with a motor base 322, the rollover motor 34 is fixed on the motor base 322, the first driving rod 35 is a telescopic rod, one end of the first driving rod 35 is hinged to the mounting cover 31, the other end of the first driving rod 35 is connected with the rollover motor 34 in a driving mode, the rollover motor 34 moves to drive the first driving rod 35 to extend out and retract, and then the motor base 322 and the support plate 32 are driven to perform reciprocating rollover actions around the first rotating shaft.
A nozzle support 33 provided on the carrier plate 32 for supporting the nozzle 4; the nozzle 4 is arranged on the nozzle support 33 in a swinging mode through a second rotating shaft 38; the rotating motor 36 is disposed on the carrier plate 32 through a motor bracket 39, the second driving rod 37 is a telescopic rod, one end of the second driving rod 37 is connected to the rotating motor 36, and the other end of the second driving rod 37 is connected to the nozzle 4, and the rotating motor 36 drives the second driving rod 37 to extend and retract, so that the nozzle 4 swings back and forth around the second rotating shaft 38 relative to the nozzle support 33.
The tail end of the waterway 2 is provided with a water pump 21 and a water storage tank 22; an upper liquid level switch 23 and a lower liquid level switch 24 are arranged in the water storage tank 22 and used for monitoring the water level in the water storage tank 22; a connecting branch pipe 25 is arranged between the water storage tank 22 and the nozzle 4, the water pump 21 is arranged on the connecting branch pipe 25, and the front end of the nozzle 4 is provided with a flushing electromagnetic valve 41; the reservoir tank 22 is provided with a water supply pipe 26 and a water discharge pipe 27.
In the embodiment, a PLC controller is arranged to realize automatic control; a coal baffle plate 11 is arranged in the coal dropping pipe 1, and a vision sensor 5 is arranged at a position which is close to the joint of the coal baffle plate and the coal dropping pipe and is slightly lower than the joint, as shown in figure 2; monitoring the blockage condition in the coal dropping pipe through the visual sensor 5, and transmitting the monitored data to the PLC to control the opening and closing of the flushing electromagnetic valve 41, wherein the water quantity in the water storage tank 22 meets the use condition (the lower liquid level switch is not triggered, and the water pump can be opened), the water pump is started, and the flushing operation is carried out; during the flushing process, the upper level switch is triggered, and the water adding solenoid valve (not shown) is effective to supply the water in the water storage tank 22 in real time to meet the use requirement.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the scope of the invention. It will be appreciated by those skilled in the art that changes may be made without departing from the scope of the invention, and it is intended that all matter contained in the above description or shown in the accompanying drawings shall be interpreted as illustrative and not in a limiting sense.
Claims (9)
1. The utility model provides a coal breakage pipe prevents stifled device which characterized in that, coal breakage pipe prevents stifled device includes:
the device comprises a waterway, a nozzle and a coal dropping pipe, wherein the waterway is used for pressurizing and flushing the coal dropping pipe, the front end of the waterway is provided with the nozzle, and the nozzle is arranged in a rotating and/or translating way relative to the coal dropping pipe so as to enable the nozzle to at least partially act on coal dust in the coal dropping pipe;
the swinging mechanism comprises an installation cover and at least one group of driving components, the installation cover is fixed on the coal dropping pipe, and the nozzle is movably arranged on the installation cover;
the nozzle rotates and/or translates under the action of the driving part to drive the nozzle to flush the coal powder accumulated in the coal dropping pipe, so that the coal powder falls off;
the swing mechanism further comprises a support plate, and the support plate is rotatably connected with the mounting cover; the mounting cover is provided with a lower through hole communicated with the interior of the coal dropping pipe, the support plate is provided with an upper through hole, and water injected by the nozzle can directly act on coal powder accumulated in the coal dropping pipe in the rotating process of the nozzle.
2. The coal chute blockage preventing device as claimed in claim 1, wherein a first rotating shaft is disposed between the support plate and the mounting cover, the driving member comprises a side-turning motor and a first driving rod, the first driving rod is in driving connection with the support plate, and the side-turning motor is actuated to drive the first driving rod to move so as to turn the support plate laterally around the first rotating shaft.
3. The coal chute blockage preventing device as recited in claim 1, wherein the carrier plate is provided with a nozzle support, and the nozzle is rotatably and/or slidably connected with the nozzle support so that the nozzle can more fully flush the coal dust accumulated in the coal chute.
4. The coal chute blockage preventing device as claimed in claim 3, wherein a second rotating shaft is arranged between the nozzle and the nozzle support, the driving member comprises a rotating motor and a second driving rod, the second driving rod is in driving connection with the nozzle, and the rotating motor rotates to drive the second driving rod to move, so that the nozzle rotates around the second rotating shaft relative to the nozzle support.
5. The coal chute blockage prevention device as recited in claim 1, wherein a monitoring mechanism is provided in the coal chute to monitor blockage in the coal chute, the monitoring mechanism comprising at least one set of visual sensors.
6. The coal chute blockage preventing device as recited in claim 5, wherein the coal chute blockage preventing device is provided with a control module, the control module comprises a controller and a flushing solenoid valve, and the controller acquires data of the visual sensor to control the flushing solenoid valve to be opened or closed.
7. The coal dropping pipe anti-blocking device according to claim 6, wherein a water pump is arranged at the tail end of the waterway, and the control module controls the water pump to be turned on or off so as to complete the flushing process of the nozzle on the coal dust accumulated in the coal dropping pipe.
8. The coal chute blockage prevention device as recited in claim 7, wherein the water pump is terminated with a self-contained water tank having an automatic water replenishment mechanism.
9. The coal chute blockage prevention device as recited in claim 1, further comprising a limit sensor for detecting the position of the water spray from the nozzle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810198259.XA CN108423326B (en) | 2018-03-09 | 2018-03-09 | Coal breakage pipe anti-blocking device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810198259.XA CN108423326B (en) | 2018-03-09 | 2018-03-09 | Coal breakage pipe anti-blocking device |
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| CN108423326A CN108423326A (en) | 2018-08-21 |
| CN108423326B true CN108423326B (en) | 2020-01-10 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109819222B (en) * | 2019-02-28 | 2021-02-09 | 中国能源建设集团广东省电力设计研究院有限公司 | Coal conveying system coal blockage monitoring method, device, system and computer equipment |
| CN112046957A (en) * | 2019-06-05 | 2020-12-08 | 西安瑞德宝尔智能科技有限公司 | Method and device for monitoring and processing ore blocking |
| CN111648288A (en) * | 2020-05-06 | 2020-09-11 | 徐州徐工环境技术有限公司 | Cleaning vehicle dust absorption pipe anti-blocking device based on pressure detection and control system |
| CN116481042B (en) * | 2023-04-24 | 2023-11-07 | 徐州天一物料输送工程有限公司 | Anti-blocking device for furnace feeding curve, pulverized coal furnace and fluidized bed |
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| CN1119171A (en) * | 1994-07-27 | 1996-03-27 | 瑟库普制造公司 | Method and means for adding moisture to particulate material |
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| CN108423326A (en) | 2018-08-21 |
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