CN112833241A - Blanking dome valve control system and control method - Google Patents
Blanking dome valve control system and control method Download PDFInfo
- Publication number
- CN112833241A CN112833241A CN202110218549.8A CN202110218549A CN112833241A CN 112833241 A CN112833241 A CN 112833241A CN 202110218549 A CN202110218549 A CN 202110218549A CN 112833241 A CN112833241 A CN 112833241A
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- China
- Prior art keywords
- valve
- blanking
- cylinder
- sealing ring
- dome
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
Abstract
The invention provides a blanking dome valve control system and a control method, wherein the action sequence of a dome valve is controlled through a time delay relay and an air cylinder electromagnetic valve, so that the dome valve acts according to a preset rule, when a blanking process starts, a sealing ring air cylinder is preferentially acted to exhaust steam for a sealing ring, and after time delay, the blanking air cylinder is started to open the blanking valve. The blanking valve can be guaranteed to start to act after the sealing ring finishes steam exhaust, the unreasonable action relation between the blanking valve and the sealing ring is avoided, abnormal friction caused by incomplete steam exhaust of the sealing ring during action of the blanking valve is avoided, and step-by-step action of the blanking dome valve is achieved.
Description
Technical Field
The invention relates to the technical field of dust removal, in particular to a blanking dome valve control system and a control method thereof.
Background
The main functions of the electric dust removal conveying system are as follows: after flue gas generated by the boiler is treated by electric fields of electric dust removal, the generated ash is stored in bin pumps, the bin pumps place the ash into a conveying pipeline through a blanking dome valve, and the ash is conveyed to an ash warehouse by using compressed air as power. The main component of the blanking dome valve is a blanking valve, the blanking valve controls an air cylinder, an exhaust valve air cylinder, a blanking valve closing position pressure switch and a sealing ring.
The blanking dome valve is controlled in sequence step by step in the closing process, and the valve opening process is the simultaneous action of equipment. The blanking valve and the sealing ring perform steam exhaust simultaneously in the valve opening process, and the situations of mechanical abrasion and blocking, valve dust accumulation, limit faults, air cylinder leakage and the like exist on site, so that the conditions of non-uniform steam exhaust of the sealing ring and the opening action rate of the blanking valve in the valve opening process frequently occur in the actual working process, the valve and the sealing ring are hard rubbed or clamped and blocked, and the sealing ring is damaged. Since the equipment was put into operation, the sealing washer damaged the frequency and is high, and single unit can reach more than 10 times per month, and the personnel change work load great, and influence unit conveying capacity, if the material level is too high in the storehouse pump for a long time, still take place the phenomenon of hardening easily, cause the storehouse pump unable to use.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a blanking dome valve control system and a control method thereof, which realize the step-by-step action of blanking dome valve equipment and reduce the equipment damage probability by controlling a control air source pipeline and an instruction loop.
The invention is realized by the following technical scheme:
a blanking dome valve control system comprises a controller, a time delay relay, an air cylinder electromagnetic valve, a blanking air cylinder, a sealing ring air cylinder and a sealing ring;
the controller is connected with the cylinder electromagnetic valve through a time delay relay, the cylinder electromagnetic valve is connected with the blanking cylinder, the blanking cylinder is connected with the dome valve, the controller is connected with the sealing ring cylinder through the sealing ring electromagnetic valve, and the sealing ring cylinder is connected with the sealing ring;
the controller outputs action instructions of the blanking cylinder and the sealing ring cylinder according to the switching valve instruction, and when the valve is closed, the sealing ring cylinder and the blanking cylinder act sequentially.
Preferably, the sealing ring comprises a blanking sealing ring and an exhaust sealing ring, the blanking sealing ring and the exhaust sealing ring are respectively located at an inlet and an outlet of the dome valve, and the sealing ring cylinder is respectively connected with the blanking sealing ring and the exhaust sealing ring.
Preferably, the controller is further connected with a limit switch, and the limit switch is used for detecting the closing state of the dome valve.
Preferably, the time delay of the time delay relay is 2S-5S.
Preferably, the limit switch is a contact type pneumatic control switch.
A control method of a blanking dome valve control system comprises a dome valve opening method and a dome valve closing method;
the valve opening process is as follows:
the controller outputs action instructions of the cylinder electromagnetic valve and the sealing ring electromagnetic valve according to the valve opening instruction;
the cylinder electromagnetic valve controls the action of the sealing ring cylinder according to the action command, and the sealing ring exhausts;
after the sealing ring cylinder acts, the cylinder electromagnetic valve delays for a preset time to control the action of the blanking cylinder, so that the blanking valve of the dome valve is opened;
the valve closing process is as follows:
the controller outputs action instructions of the cylinder electromagnetic valve and the sealing ring electromagnetic valve according to the valve closing instruction;
the cylinder electromagnetic valve and the sealing ring electromagnetic valve control the blanking cylinder and the sealing ring cylinder to act according to the action command, the sealing ring cylinder inflates the sealing ring, and the blanking cylinder controls the blanking valve of the dome valve to close.
Preferably, in the valve closing process, the cylinder electromagnetic valve and the sealing ring electromagnetic valve control the blanking cylinder and the sealing ring cylinder to synchronously act according to the action instruction,
or the cylinder solenoid valve controls the action of the blanking cylinder, and the sealing ring solenoid valve controls the action of the sealing ring cylinder after delaying for a preset time.
Compared with the prior art, the invention has the following beneficial technical effects:
the blanking dome valve control system provided by the invention controls the action sequence of the dome valve through the time delay relay and the cylinder electromagnetic valve, so that the dome valve acts according to a preset rule, the sealing ring cylinder is preferentially acted when the blanking process starts, the sealing ring is exhausted, and the blanking cylinder is started to open the blanking valve after time delay. The blanking valve can be guaranteed to start to act after the sealing ring finishes steam exhaust, the unreasonable action relation between the blanking valve and the sealing ring is avoided, abnormal friction caused by incomplete steam exhaust of the sealing ring during action of the blanking valve is avoided, and step-by-step action of the blanking dome valve is achieved.
Drawings
Fig. 1 is a control schematic of the dome valve of the present invention.
In the figure: 1. a time delay relay; 2. an air cylinder electromagnetic valve; 3. a blanking cylinder; 4. a seal ring electromagnetic valve; 5. a seal ring cylinder; 6. an exhaust seal ring; 7. blanking circle cylinder.
Detailed Description
The present invention will now be described in further detail with reference to the attached drawings, which are illustrative, but not limiting, of the present invention.
Referring to fig. 1, a blanking dome valve control system includes a controller, a delay relay, a cylinder solenoid valve 2, a blanking cylinder 3, a seal ring cylinder 5, and a seal ring.
The controller is connected with cylinder solenoid valve 2 through time delay relay 1, and cylinder solenoid valve 2 is connected with blanking cylinder 3, and blanking cylinder 3 is connected with the dome valve, and the controller passes through sealing washer solenoid valve 4 to be connected with sealing washer cylinder 5, and sealing washer cylinder 5 is connected with the sealing washer.
The controller outputs action instructions of the blanking cylinder 3 and the sealing ring cylinder 5 according to the switching valve instruction, and when the valve is closed, the sealing ring cylinder 5 and the blanking cylinder 3 act in sequence.
The controller is also connected with a limit switch, the limit switch is used for detecting whether the dome valve is closed in place, when the valve of the dome valve is completely closed, the limit switch is triggered, the limit switch sends a control instruction to prevent the dome valve from being not completely closed, and meanwhile, the fault of the valve can be proved.
The limit switch is a contact type pneumatic control switch.
The delay time of the delay relay 1 is 2S-5S.
The sealing ring comprises a blanking sealing ring 7 and an exhaust sealing ring 6, the blanking sealing ring and the exhaust sealing ring are respectively positioned at the inlet and the outlet of the dome valve, and the sealing ring air cylinder 5 is respectively connected with the blanking sealing ring and the exhaust sealing ring to control the two sealing rings to synchronously act.
The following describes in detail a control method of a blanking dome valve control system provided by the present invention, which includes a valve opening process and a valve closing process of a dome valve.
The valve opening process is as follows:
the controller outputs action instructions of the cylinder electromagnetic valve 2 and the sealing ring electromagnetic valve 4 according to the valve opening instruction;
the cylinder electromagnetic valve 2 controls the action of the sealing ring cylinder 5 according to the action command, and the sealing ring exhausts;
after the sealing ring cylinder 5 acts, the cylinder electromagnetic valve 2 delays for a preset time to control the blanking cylinder 3 to act according to the action instruction, so that the blanking valve of the dome valve is opened, and the ash discharging process is started.
The valve closing process is as follows:
the controller outputs action instructions of the cylinder electromagnetic valve 2 and the sealing ring electromagnetic valve 4 according to the valve closing instruction;
the cylinder electromagnetic valve 2 and the sealing ring electromagnetic valve 4 control the blanking cylinder 3 and the sealing ring cylinder 5 to simultaneously act according to the action instruction, the sealing ring cylinder 5 inflates the sealing ring, and the blanking cylinder 3 controls the blanking valve of the dome valve to be closed.
Or the cylinder electromagnetic valve 2 controls the blanking cylinder 3 to act, the blanking valve of the dome valve is closed, and the sealing ring cylinder 5 inflates the sealing ring after delaying for a preset time.
The invention provides a blanking dome valve control system, which controls the action sequence of a dome valve through a time delay relay 1 and an air cylinder electromagnetic valve 2 so that the dome valve acts according to a preset rule, a sealing ring air cylinder 5 is preferentially acted when the blanking process starts, the sealing ring is exhausted, and after time delay, a blanking air cylinder 3 is started to open the blanking valve. The blanking valve can be guaranteed to start to act after the sealing ring finishes steam exhaust, the unreasonable action relation between the blanking valve and the sealing ring is avoided, and abnormal friction caused by incomplete steam exhaust of the sealing ring during action of the blanking valve is avoided. A time relay and a single-control electromagnetic valve are added in the electric cabinet, so that the step-by-step action of the blanking dome valve is realized.
After the blanking dome valve receives a valve opening instruction, the steam exhaust valve acts preferentially to exhaust steam from the sealing ring, instruction delay 2S is realized through the time relay, the blanking valve is opened, and the equipment acts step by step, so that the friction condition between the blanking valve and the sealing ring can be effectively avoided, and the damage probability of the sealing ring is reduced.
The invention adopts the orderly step-by-step actions of the blanking valve and the sealing ring, and avoids abnormal friction, thereby greatly reducing the abrasion and the aging of equipment. The service life of the equipment is prolonged, fine ash in the ash hopper is leaked from the abrasion to extend the air source pipeline to enter the air control loop after the sealing ring is damaged, the normal use of the emergency electromagnetic valve, the air control switch and the filter is avoided, and the service life of the equipment is shortened. The pneumatic control loop after the transformation has no impurities, the working environment is good, and the normal service life of the equipment is ensured.
Secondly, be convenient for look over and the analysis problem, valve and sealing washer move respectively can the visual observation action process, and diagnosis and analysis trouble are simple and convenient direct, do benefit to the maintenance.
The above-mentioned contents are only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited thereby, and any modification made on the basis of the technical idea of the present invention falls within the protection scope of the claims of the present invention.
Claims (7)
1. A blanking dome valve control system is characterized by comprising a controller, a time delay relay (1), an air cylinder electromagnetic valve (2), a blanking air cylinder (3), a sealing ring air cylinder (5) and a sealing ring;
the controller is connected with the air cylinder electromagnetic valve (2) through the delay relay (1), the air cylinder electromagnetic valve (2) is connected with the blanking air cylinder (3), the blanking air cylinder (3) is connected with the dome valve, the controller is connected with the sealing ring air cylinder (5) through the sealing ring electromagnetic valve (4), and the sealing ring air cylinder (5) is connected with the sealing ring;
the controller outputs action instructions of the blanking cylinder (3) and the sealing ring cylinder (5) according to the switching valve instruction, and when the valve is closed, the sealing ring cylinder (5) and the blanking cylinder (3) act sequentially.
2. The blanking dome valve control system of claim 1, wherein the seal rings comprise a blanking seal ring and an exhaust seal ring, the blanking seal ring and the exhaust seal ring are respectively located at an inlet and an outlet of the dome valve, and the seal ring cylinder (5) is respectively connected with the blanking seal ring and the exhaust seal ring.
3. A blanking dome valve control system as set forth in claim 1 wherein said controller is further connected to a limit switch for detecting a closed condition of the dome valve.
4. A blanking dome valve control system as set forth in claim 3, characterized in that the delay of said delay relay (1) is 2S-5S.
5. A blanking dome valve control system as set forth in claim 1, wherein said limit switch is a contact pneumatic switch.
6. A control method of a blanking dome valve control system as claimed in any one of claims 1 to 5, comprising an opening method and a closing method of the dome valve;
the valve opening process is as follows:
the controller outputs action instructions of the cylinder electromagnetic valve (2) and the sealing ring electromagnetic valve (4) according to the valve opening instruction;
the cylinder electromagnetic valve (2) controls the action of the sealing ring cylinder (5) according to the action command, and the sealing ring exhausts;
after the sealing ring cylinder (5) acts, the cylinder electromagnetic valve (2) delays for a preset time to control the blanking cylinder (3) to act, so that the blanking valve of the dome valve is opened;
the valve closing process is as follows:
the controller outputs action instructions of the cylinder electromagnetic valve (2) and the sealing ring electromagnetic valve (4) according to the valve closing instruction;
the cylinder electromagnetic valve (2) and the sealing ring electromagnetic valve (4) control the blanking cylinder (3) and the sealing ring cylinder (5) to move according to the action instruction, the sealing ring cylinder (5) inflates the sealing ring, and the blanking cylinder (3) controls the blanking valve of the dome valve to be closed.
7. The control method of the blanking dome valve control system as claimed in claim 6, wherein during the valve closing process, the cylinder solenoid valve (2) and the seal ring solenoid valve (4) control the blanking cylinder (3) and the seal ring cylinder (5) to synchronously act according to the action command,
or the cylinder electromagnetic valve (2) controls the blanking cylinder (3) to act, and the sealing ring electromagnetic valve (4) controls the sealing ring cylinder (5) to act after delaying for preset time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110218549.8A CN112833241A (en) | 2021-02-26 | 2021-02-26 | Blanking dome valve control system and control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110218549.8A CN112833241A (en) | 2021-02-26 | 2021-02-26 | Blanking dome valve control system and control method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112833241A true CN112833241A (en) | 2021-05-25 |
Family
ID=75933792
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110218549.8A Pending CN112833241A (en) | 2021-02-26 | 2021-02-26 | Blanking dome valve control system and control method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112833241A (en) |
-
2021
- 2021-02-26 CN CN202110218549.8A patent/CN112833241A/en active Pending
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