CN112079075A - Method for controlling ash discharge of charge level indicator based on negative pressure drive - Google Patents
Method for controlling ash discharge of charge level indicator based on negative pressure drive Download PDFInfo
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- CN112079075A CN112079075A CN202010903329.4A CN202010903329A CN112079075A CN 112079075 A CN112079075 A CN 112079075A CN 202010903329 A CN202010903329 A CN 202010903329A CN 112079075 A CN112079075 A CN 112079075A
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- Prior art keywords
- negative pressure
- proximity switch
- ash discharge
- programmable controller
- level indicator
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G43/00—Control devices, e.g. for safety, warning or fault-correcting
- B65G43/08—Control devices operated by article or material being fed, conveyed or discharged
-
- 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
- B65D88/26—Hoppers, i.e. containers having funnel-shaped discharge sections
-
- 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
- B65D90/00—Component parts, details or accessories for large containers
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/05—Programmable logic controllers, e.g. simulating logic interconnections of signals according to ladder diagrams or function charts
- G05B19/054—Input/output
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Gasification And Melting Of Waste (AREA)
Abstract
The invention discloses a method for controlling ash discharge of a charge level indicator based on negative pressure driving, which belongs to the technical field of charge level indicators and comprises the following steps: firstly, two charge level indicator mounting holes are formed in the side wall of the hopper; one mounting hole is positioned at the upper limit of the accumulated dust; the other mounting hole is positioned at the lower limit of the accumulated dust; the two charge level indicator mounting holes are provided with a negative pressure driven charge level indicator, and the charge level indicator comprises a base tube, a sliding block, a return spring, a trigger part and a proximity switch; the proximity switch is electrically connected with the programmable controller; the programmable controller is internally pre-stored with a module for starting and closing the ash discharge instruction; aiming at the upper limit material level meter, the initial position of the sliding block is the trigger position of the proximity switch, and at the moment, the proximity switch of the upper limit material level meter executes and starts the ash discharge instruction module through the programmable controller; aiming at the lower limit material level meter, the limit position of the sliding block is the trigger position of the proximity switch, and the proximity switch of the lower limit material level meter executes the instruction module for closing the ash discharge through the programmable controller.
Description
Technical Field
The invention belongs to the technical field of charge level indicators, and particularly relates to a charge level indicator control ash discharge method based on negative pressure driving.
Background
As is well known, a level indicator arranged on a hopper of a dust remover is mainly used for automatically detecting the limit level of the dust removing hopper and transmitting a detection signal to a PLC (programmable logic controller) for automatically controlling ash discharge. At present, current charge level indicator mainly includes hinders rotary material level switch, shakes excellent formula material level switch, capacitanc material level switch etc. because dust removal hopper internal environment is abominable, and firstly the dust concentration in the hopper is bigger, and the negative pressure is bigger moreover, and above-mentioned two reasons very easily lead to proximity switch to damage or be out of order, and traditional charge level indicator's service life generally is about half a year. The damaged material level switch cannot accurately measure the material level in the hopper. Therefore, it is important to design and develop a method for controlling ash discharge by a level meter based on negative pressure driving.
Disclosure of Invention
The invention provides a method for controlling ash discharge of a charge level indicator based on negative pressure drive, which aims to solve the technical problems in the prior art and is used for preventing dust from damaging the charge level indicator.
The invention aims to provide a method for controlling ash discharge by a charge level indicator based on negative pressure drive, which is used for automatically discharging ash from dust accumulated in a hopper of a dust remover; the method comprises the following steps:
s1, forming two charge level indicator mounting holes in the side wall of the hopper; wherein, one mounting hole is positioned at the upper limit of the accumulated dust; the other mounting hole is positioned at the lower limit of the accumulated dust;
s2, respectively installing negative pressure driven level meters at the installation holes of the two level meters, wherein the two level meters are defined as an upper limit level meter and a lower limit level meter; the material level meter is connected with a programmable controller for controlling the action of the ash discharging electromagnetic valve; wherein:
the charge level indicator comprises a base pipe fixed at the mounting hole of the charge level indicator, a sliding block positioned in the base pipe, a reset spring driving the sliding block to reset, a trigger part fixedly connected with the sliding block and a proximity switch matched with the trigger part to work; the proximity switch is electrically connected with an I/O port of the programmable controller; the programmable controller is internally pre-stored with a module for starting and closing the ash discharge instruction;
s3, when the base pipe is not blocked by the deposited ash; the sliding block moves along the axis direction of the base pipe according to the negative pressure in the hopper, moves towards the inner cavity of the hopper when the negative pressure is increased, and moves towards the outer side of the hopper when the negative pressure is reduced; when the base pipe is blocked by deposited dust; the return spring drives the slide block to return to the initial position;
aiming at the upper limit material level meter, the initial position of the sliding block is the trigger position of the proximity switch, and at the moment, the proximity switch of the upper limit material level meter executes and starts the ash discharge instruction module through the programmable controller;
aiming at the lower limit material level meter, the limit position of the sliding block is the trigger position of the proximity switch, and the proximity switch of the lower limit material level meter executes the instruction module for closing the ash discharge through the programmable controller.
Preferably, when the ash discharge instruction starting module is executed, the programmable controller starts timing, and when the programmable controller does not receive the trigger instruction of the lower limit level indicator within the preset time T, the programmable controller starts an alarm instruction.
Preferably, the axis of the level gauge mounting hole forms an angle of 45 to 80 degrees with the horizontal line.
Preferably, the slider is the piston, is provided with the bulge loop in the parent tube, and reset spring is located the outside of bulge loop, and reset spring's one end and bulge loop contact, the other end and piston connection.
Preferably, the trigger of the proximity switch is mounted on the piston rod.
Preferably, the slider is the diaphragm, is provided with the bulge loop in the parent tube, and reset spring is located the outside of bulge loop, and reset spring's one end and bulge loop contact, the other end passes through the gland and is connected with the central point of diaphragm.
Preferably, the proximity switch is connected to the gland.
The invention has the advantages and positive effects that:
according to the invention, the negative pressure in the hopper of the dust remover is used as a power source to further attract the sliding block to move, and then the movement of the sliding block drives the trigger piece of the proximity switch to act, so that the work of detection and automatic ash discharge is finally realized. Meanwhile, whether the time length of the ash discharging action exceeds the preset time or not is detected, whether a fault occurs or not is judged, early warning is timely made, and the reliability of the ash discharging process is improved.
Drawings
FIG. 1 is a flow chart of a preferred embodiment of the present invention;
FIG. 2 is an exploded view of a first construction of a level gauge in a preferred embodiment of the present invention;
FIG. 3 is a structural view of a first structure of the level gauge in the preferred embodiment of the present invention;
FIG. 4 is an exploded view of a second construction of the level gauge in the preferred embodiment of the present invention;
Detailed Description
In order to further understand the contents, features and effects of the present invention, the following embodiments are illustrated and described in detail with reference to the accompanying drawings:
as shown in fig. 1:
a method for controlling ash discharge based on a negative pressure driven charge level indicator is used for automatically discharging ash from dust accumulated in a hopper of a dust remover; the method comprises the following steps:
s1, forming two charge level indicator mounting holes in the side wall of the hopper; wherein, one mounting hole is positioned at the upper limit of the accumulated dust; the other mounting hole is positioned at the lower limit of the accumulated dust; the positions of the upper limit and the lower limit are set according to actual sites, the upper limit corresponds to the highest value of dust accumulation in the hopper, namely when the dust reaches the height, the dust is discharged, and the lower limit corresponds to the stopping of the dust discharge;
s2, respectively installing negative pressure driven level gauges at the installation holes of the two level gauges, wherein the two level gauges are respectively defined as an upper limit level gauge and a lower limit level gauge; the material level meter is connected with a programmable controller for controlling the action of the ash discharging electromagnetic valve; the ash discharging electromagnetic valve is arranged on the ash discharging pipeline; wherein:
the charge level indicator comprises a base pipe fixed at the mounting hole of the charge level indicator, a sliding block positioned in the base pipe, a reset spring driving the sliding block to reset, a trigger part fixedly connected with the sliding block and a proximity switch matched with the trigger part to work; the proximity switch is electrically connected with an I/O port of the programmable controller; the programmable controller is internally pre-stored with a module for starting and closing the ash discharge instruction;
s3, when the base pipe is not blocked by the deposited ash; the sliding block moves along the axis direction of the base pipe according to the negative pressure in the hopper, moves towards the inner cavity of the hopper when the negative pressure is increased, and moves towards the outer side of the hopper when the negative pressure is reduced; when the base pipe is blocked by deposited dust; the return spring drives the slide block to return to the initial position; in the hopper, most of the time, the height of the deposited ash is smaller than that of the upper limiting level indicator, namely, the inner port of the base pipe of the upper limiting level indicator is in an unblocked state, most of the time, the height of the deposited ash is larger than that of the lower limiting level indicator, namely, the inner port of the base pipe of the lower limiting level indicator is in a blocked state;
aiming at the upper limit material level meter, the initial position of the sliding block is the trigger position of the proximity switch, and at the moment, the proximity switch of the upper limit material level meter executes and starts the ash discharge instruction module through the programmable controller;
aiming at the lower limit material level meter, the limit position of the sliding block is the trigger position of the proximity switch, and the proximity switch of the lower limit material level meter executes the instruction module for closing the ash discharge through the programmable controller.
The initial position refers to the position of the slide block when the return spring is not stressed, namely in a natural state; the limit position refers to the position of the slide block under the action of negative pressure of a return spring;
in order to improve the safety, when the ash discharge instruction module is started, the programmable controller starts to time, and when the programmable controller does not receive the trigger instruction of the lower limit level indicator within the preset time T, the programmable controller starts an alarm instruction. The value T is the average value of the ash discharge time obtained by a plurality of experimental tests.
The ash deposition surface is not the horizontal plane, and the contained angle of general ash deposition surface and horizontal plane is about 45 degrees, and for preventing that the dust accumulation from blockking up the parent tube, the axis of charge level indicator mounting hole is 45 to 80 degrees with the contained angle of horizontal line. That is, the inner port of the base pipe is lower than the outer port, thus reducing the accumulation of dust at the ports;
the form of the slider in the above preferred embodiment is many, and the piston and the diaphragm are explained below separately:
as shown in fig. 2 and 3: the slider is the piston, is provided with the bulge loop in the parent tube, and reset spring is located the outside of bulge loop, and reset spring's one end and bulge loop contact, the other end and piston connection, install at the medial extremity port of parent tube and filter the lid. The trigger piece of the proximity switch is arranged on the piston rod.
The base pipe 4 penetrates through the hopper wall of the dust remover; the base pipe 4 comprises a pipe body, and an annular bulge, namely a convex ring, is arranged inside the pipe body; the gland 1 is fixed on the outer end surface of the base pipe 7; a plurality of vent holes are formed in the gland 1; the inside and outside in the preferred embodiment refer to the inside and outside of the dust removal bin; the gland 1 is connected with the base pipe 4 through threads; the piston 2 is arranged in the base pipe 4; a through hole through which the piston rod passes is formed in the central shaft of the gland 1, and the gland 1 can realize the filtering function; the return spring 3 is positioned between the piston 2 and the convex ring; the trigger piece 7 is fixed at the end part of the piston rod; the proximity switch 6 is fixedly connected with the gland 1 or the base pipe 4 through a connecting sheet 5.
As shown in fig. 4: the slider is diaphragm 8, is provided with the bulge loop in basic tube 4, and reset spring is located the outward appearance of bulge loop 3, and reset spring's one end and bulge loop contact, and the other end passes through the gland and is connected with the central point of diaphragm position. The proximity switch is connected with the gland through the gland; the proximity switch 6 is connected with the outer port of the base tube 4 sequentially through a bracket 11, a bolt 10, a flange 9 and a membrane 8.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and all simple modifications, equivalent changes and modifications made to the above embodiment according to the technical spirit of the present invention are within the scope of the technical solution of the present invention.
Claims (7)
1. A method for controlling ash discharge based on a negative pressure driven charge level indicator is used for automatically discharging ash from dust accumulated in a hopper of a dust remover; the method is characterized by comprising the following steps:
s1, forming two charge level indicator mounting holes in the side wall of the hopper; wherein, one mounting hole is positioned at the upper limit of the accumulated dust; the other mounting hole is positioned at the lower limit of the accumulated dust;
s2, respectively installing negative pressure driven level meters at the installation holes of the two level meters, wherein the two level meters are defined as an upper limit level meter and a lower limit level meter; the material level meter is connected with a programmable controller for controlling the action of the ash discharging electromagnetic valve; wherein:
the charge level indicator comprises a base pipe fixed at the mounting hole of the charge level indicator, a sliding block positioned in the base pipe, a reset spring driving the sliding block to reset, a trigger part fixedly connected with the sliding block and a proximity switch matched with the trigger part to work; the proximity switch is electrically connected with an I/O port of the programmable controller; the programmable controller is internally pre-stored with a module for starting and closing the ash discharge instruction;
s3, when the base pipe is not blocked by the deposited ash; the sliding block moves along the axis direction of the base pipe according to the negative pressure in the hopper, moves towards the inner cavity of the hopper when the negative pressure is increased, and moves towards the outer side of the hopper when the negative pressure is reduced; when the base pipe is blocked by deposited dust; the return spring drives the slide block to return to the initial position;
aiming at the upper limit material level meter, the initial position of the sliding block is the trigger position of the proximity switch, and at the moment, the proximity switch of the upper limit material level meter executes and starts the ash discharge instruction module through the programmable controller;
aiming at the lower limit material level meter, the limit position of the sliding block is the trigger position of the proximity switch, and the proximity switch of the lower limit material level meter executes the instruction module for closing the ash discharge through the programmable controller.
2. The negative pressure drive-based level gauge control ash discharging method of claim 1, wherein when the ash discharging command starting module is executed, the programmable controller starts timing, and when the programmable controller does not receive the trigger command of the lower limit level gauge within a preset time T, the programmable controller starts an alarm command.
3. The negative pressure drive-based level gauge controlled ash discharge method of claim 1, wherein the included angle between the axis of the level gauge mounting hole and the horizontal line is 45-80 degrees.
4. The negative pressure drive-based charge level indicator control ash discharge method of claim 1, wherein the slide block is a piston, a convex ring is arranged in the base tube, a return spring is arranged outside the convex ring, one end of the return spring is in contact with the convex ring, and the other end of the return spring is connected with the piston.
5. The negative pressure driven level indicator controlled ash discharge method as claimed in claim 4, wherein the trigger of the proximity switch is mounted on the piston rod.
6. The negative pressure drive-based charge level indicator controlled ash discharge method of claim 1, wherein the slide block is a diaphragm, a convex ring is arranged in the base tube, a return spring is arranged outside the convex ring, one end of the return spring is in contact with the convex ring, and the other end of the return spring is connected with the central position of the diaphragm through a gland.
7. The negative pressure driven level indicator controlled ash discharge method as claimed in claim 6, wherein the proximity switch is connected with a gland.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010903329.4A CN112079075A (en) | 2020-09-01 | 2020-09-01 | Method for controlling ash discharge of charge level indicator based on negative pressure drive |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010903329.4A CN112079075A (en) | 2020-09-01 | 2020-09-01 | Method for controlling ash discharge of charge level indicator based on negative pressure drive |
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| CN112079075A true CN112079075A (en) | 2020-12-15 |
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| CN202010903329.4A Pending CN112079075A (en) | 2020-09-01 | 2020-09-01 | Method for controlling ash discharge of charge level indicator based on negative pressure drive |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2010858A1 (en) * | 1970-03-07 | 1971-09-30 | Teves Gmbh Alfred | Device for level display for containers |
| CN87215064U (en) * | 1987-11-03 | 1988-09-28 | 云南省电力工业局试验研究所 | Negative pressure membrane switch charge level incicator |
| CN101920144A (en) * | 2010-08-30 | 2010-12-22 | 无锡市天虹环保工程有限公司 | Material-level detecting device of dust collector ash hopper |
| CN201776037U (en) * | 2010-08-30 | 2011-03-30 | 无锡市天虹环保工程有限公司 | Material level detector of dust hopper of deduster |
| CN203529200U (en) * | 2013-05-23 | 2014-04-09 | 太仓北新建材有限公司 | Negative pressure stock bin for powder storage and level indicator thereof |
| CN109482007A (en) * | 2018-07-04 | 2019-03-19 | 南阳市亚龙筑路机械制造有限公司 | A kind of glance coal and dust processing equipment and its process flow |
| CN209302527U (en) * | 2018-10-25 | 2019-08-27 | 南京龙源环保有限公司 | A kind of detection device of semi-dry desulphurization dust collector ash hopper material position |
-
2020
- 2020-09-01 CN CN202010903329.4A patent/CN112079075A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2010858A1 (en) * | 1970-03-07 | 1971-09-30 | Teves Gmbh Alfred | Device for level display for containers |
| CN87215064U (en) * | 1987-11-03 | 1988-09-28 | 云南省电力工业局试验研究所 | Negative pressure membrane switch charge level incicator |
| CN101920144A (en) * | 2010-08-30 | 2010-12-22 | 无锡市天虹环保工程有限公司 | Material-level detecting device of dust collector ash hopper |
| CN201776037U (en) * | 2010-08-30 | 2011-03-30 | 无锡市天虹环保工程有限公司 | Material level detector of dust hopper of deduster |
| CN203529200U (en) * | 2013-05-23 | 2014-04-09 | 太仓北新建材有限公司 | Negative pressure stock bin for powder storage and level indicator thereof |
| CN109482007A (en) * | 2018-07-04 | 2019-03-19 | 南阳市亚龙筑路机械制造有限公司 | A kind of glance coal and dust processing equipment and its process flow |
| CN209302527U (en) * | 2018-10-25 | 2019-08-27 | 南京龙源环保有限公司 | A kind of detection device of semi-dry desulphurization dust collector ash hopper material position |
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Application publication date: 20201215 |
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