CN213894243U - Coal overflow prevention protection device - Google Patents
Coal overflow prevention protection device Download PDFInfo
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- CN213894243U CN213894243U CN202022203910.3U CN202022203910U CN213894243U CN 213894243 U CN213894243 U CN 213894243U CN 202022203910 U CN202022203910 U CN 202022203910U CN 213894243 U CN213894243 U CN 213894243U
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Abstract
The utility model relates to a coal conveying field, a prevent protection device of excessive coal, coal carbon flows down from coal breakage pipe (4) after carrying coal breakage fill (2) through belt (1), open excessive coal hole (9) on vertical side wall (5) of coal breakage fill (2), install protection device (3) of preventing excessive coal on excessive coal hole (9), this prevent protection device of excessive coal is including covering excessive coal hole (9) and upper portion and coal breakage fill (2) vertical side wall rotation apron (6) of being connected completely, install proximity switch (10) on vertical side wall, install proximity switch response piece (12) on apron (6), proximity switch (10) electric signal connection PLC, PLC electric signal connection drives belt (1) pivoted motor. The utility model discloses in time automatic shutdown when taking place the coal overflow avoids taking place extensive coal overflow.
Description
Technical Field
The utility model relates to a coal conveying field.
Background
The coal conveying system is used for storing raw coal and conveying the raw coal by a boiler of the unit.
The coal conveying system has train with spiral unloading machine to unload coal, tipping-bucket dumper for the truck, seam coal ditches for receiving coal, two coal ditches with two carrier controlled vane coal feeders to feed coal to belt conveyer, and belt conveyer to store coal in silo.
Each silo is provided with an annular coal feeder to uniformly take out the raw coal stored in the silo, then the raw coal is transported to a coal crushing machine room by a belt conveyor, and the raw coal is crushed into raw coal with the diameter of less than 30mm by screening, and then the raw coal is conveyed to a raw coal bin of a boiler by the belt conveyor to complete the coal feeding task of the boiler.
In summer, autumn and rainy seasons, the natural flowability of bulk materials is poor due to the fact that raw coal contains large water, the raw coal is easy to adhere to the cylinder wall of each coal dropping bucket of a coal conveying system to cause coal blockage and coal overflow, in addition, the conveying capacity of a system belt is large (600 t/h), the rotating speed is high (2 m/s), once coal overflows, 10t of raw coal is sprayed every minute, dozens of tons or even hundreds of tons of coal are sprayed between the belts within a few minutes, machines with narrow space between the belts cannot enter, only manual cleaning is needed, and the labor intensity is conceivable.
In addition, a large amount of raw coal overflows to cause the slipping of the belt and the roller and the friction of the belt and the raw coal, so that the serious belt friction causes the serious fire accident.
Disclosure of Invention
The utility model discloses the technical problem that will solve is: how to automatically stop in time when coal overflow occurs, and avoid large-scale coal overflow.
The utility model adopts the technical proposal that: the utility model provides a prevent protection device of excessive coal, coal carbon flows down from coal breakage pipe (4) after carrying coal breakage fill (2) through belt (1), open excessive coal hole (9) on vertical side wall (5) of coal breakage fill (2), install protection device (3) of preventing excessive coal on excessive coal hole (9), this protection device of preventing excessive coal is including covering excessive coal hole (9) completely and upper portion and coal breakage fill (2) vertical side wall rotate apron (6) of being connected, install proximity switch (10) on vertical side wall, install proximity switch response piece (12) on apron (6), proximity switch (10) signal connection PLC, PLC signal connection drives belt (1) pivoted motor.
The upper part of the cover plate (6) is welded with a rotating shaft (7), two bosses (8) with horizontal rotating holes are arranged on the vertical side wall (5), and two ends of the rotating shaft (7) penetrate through the horizontal rotating holes of the bosses (8).
The lower part of the cover plate (6) is welded with a rectangular steel plate to form a balance weight plate (11).
The coal overflow hole (9) is 300mm by 300mm, and the cover plate (6) is 320mm by 320 mm.
The distance between the top of the coal overflow hole (9) and the opening of the coal falling hopper (2) is 300-500 mm.
The vertical side wall part of the coal dropping hopper (2) is a square ring, the wall of the square ring, which is over against the coal dropping of the belt (1), is a right side wall, the wall of the belt (1) transmission wheel, which is opposite to the right side wall, is a left side wall, the front and back directions of the left side wall and the right side wall are a front side wall and a back side wall, and the coal overflow hole (9) is formed in the front side wall or the back side wall.
The utility model has the advantages that: the utility model discloses a protection device of excessive coal is prevented to side-mounting of belt conveyor's head funnel (coal breakage fill), raw coal can not cause the malfunction from falling down from the head, in case coal breakage fill chute blockage, the long-pending coal of head funnel will cause the lateral pressure for the funnel lateral wall, chute blockage perception board (apron) moves outward under the effect of this pressure and opens, JJKG switch (proximity switch) response action, chute blockage signal feedback to control circuit (plc), the relay action sends out trouble parking instruction, it shuts down to drive belt pivoted motor.
Drawings
FIG. 1 is a schematic view of the installation position of the present invention;
fig. 2 is a schematic structural diagram of the present invention;
the coal overflow prevention device comprises a belt 1, a coal dropping hopper 2, a coal dropping hopper 3, a coal overflow prevention protection device 4, a coal dropping pipe 5, a vertical side wall 6, a cover plate 7, a rotating shaft 8, a boss 9, a coal overflow hole 10, a proximity switch 11, a counterweight plate 12 and a proximity switch induction sheet.
Detailed Description
As shown in fig. 1 and 2, a 300 × 300 square hole is formed in the side surface of the coal hopper, a 320 × 320 square cover plate is manufactured, a sensor head (proximity switch sensor sheet) is arranged on the right lower corner of the cover plate, and a proximity switch (jjjkg switch) is arranged on the side surface of the cover plate.
When the coal feeder works normally, the cover plate covers the coal overflow hole, raw coal passes through the coal hopper and cannot touch the cover plate, the proximity switch induction sheet is arranged in the proximity switch induction area, and the switch contact is in a disconnected state. When the coal is stuck to the inner wall of the coal hopper and coal is accumulated to cause coal blockage, lateral pressure is formed on the side wall of the coal hopper by the coal, the cover plate is opened outwards and drives the sensed object to be separated from the proximity switch sensing area, the switch acts, and the belt stops, so that the belt is protected, and coal overflow accidents are prevented.
After the coal hopper is dredged, the cover plate is reset by the gravity of the cover plate (a steel plate is additionally arranged to be used as a balance weight for preventing the gravity from being insufficient), the device is reset, and the belt can be restarted.
In order to prevent misoperation, a tiny damper (counterweight) is added at the cover plate, so that the switch action is more reliable.
Selecting an installation position: the device is arranged on a vertical side wall (the distance between the device and the opening is 300-500mm when the device is required to be perpendicular to the opening), thereby avoiding misoperation caused by coal flow impact during normal operation, being convenient for installation, inspection and test, having flexible and reliable action and being capable of self-resetting.
The size of the opening is 300X 300 (the size of the opening can be considered according to the maximum particle size of conveyed bulk materials), the electric coal is fully considered to be raw coal with the particle size of less than 250mm, a resin full-sealed inductive switch is selected, and the baffle plate adopts a vertical suspension hinge, so that under the condition of coal blockage, even if the raw coal generates small lateral pressure, reliable action can be ensured.
Claims (6)
1. The utility model provides a prevent protection device of excessive coal, the coal charcoal flows down from coal breakage pipe (4) after carrying coal hopper (2) through belt (1), its characterized in that: open excessive coal hole (9) on vertical side wall (5) of coal breakage fill (2), install protection device (3) of preventing the excessive coal on excessive coal hole (9), this protection device who prevents the excessive coal is including covering excessive coal hole (9) and upper portion and coal breakage fill (2) vertical side wall rotation connection's apron (6) completely, install proximity switch (10) on vertical side wall, install proximity switch response piece (12) on apron (6), proximity switch (10) signal connection PLC, PLC signal connection drives belt (1) pivoted motor.
2. A coal overflow preventing protection device as claimed in claim 1, wherein: the upper part of the cover plate (6) is welded with a rotating shaft (7), two bosses (8) with horizontal rotating holes are arranged on the vertical side wall (5), and two ends of the rotating shaft (7) penetrate through the horizontal rotating holes of the bosses (8).
3. A coal overflow preventing protection device as claimed in claim 1, wherein: the lower part of the cover plate (6) is welded with a rectangular steel plate to form a balance weight plate (11).
4. A coal overflow preventing protection device as claimed in claim 1, wherein: the coal overflow hole (9) is 300mm by 300mm, and the cover plate (6) is 320mm by 320 mm.
5. A coal overflow preventing protection device as claimed in claim 1, wherein: the distance between the top of the coal overflow hole (9) and the opening of the coal falling hopper (2) is 300-500 mm.
6. A coal overflow preventing protection device as claimed in claim 1, wherein: the vertical side wall part of the coal dropping hopper (2) is a square ring, the wall of the square ring, which is over against the coal dropping of the belt (1), is a right side wall, the wall of the belt (1) transmission wheel, which is opposite to the right side wall, is a left side wall, the front and back directions of the left side wall and the right side wall are a front side wall and a back side wall, and the coal overflow hole (9) is formed in the front side wall or the back side wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022203910.3U CN213894243U (en) | 2020-09-30 | 2020-09-30 | Coal overflow prevention protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022203910.3U CN213894243U (en) | 2020-09-30 | 2020-09-30 | Coal overflow prevention protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213894243U true CN213894243U (en) | 2021-08-06 |
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ID=77112495
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022203910.3U Active CN213894243U (en) | 2020-09-30 | 2020-09-30 | Coal overflow prevention protection device |
Country Status (1)
| Country | Link |
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| CN (1) | CN213894243U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114194773A (en) * | 2021-11-05 | 2022-03-18 | 淮北矿业股份有限公司 | Novel pneumatic plate turning vehicle for coal distributing hopper of main belt machine head |
-
2020
- 2020-09-30 CN CN202022203910.3U patent/CN213894243U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114194773A (en) * | 2021-11-05 | 2022-03-18 | 淮北矿业股份有限公司 | Novel pneumatic plate turning vehicle for coal distributing hopper of main belt machine head |
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