Dust collector diaphragm valve capable of performing manual emergency operation
View Patent ↗A dust collector diaphragm valve capable of performing manual emergency operation according to the present invention is configured to perform control so that the internal equal pressure of the diaphragm valve can be broken due to an internal pressure drop attributable to an instantaneous air discharge occurring whenever an emergency operation switch is manually pressed when a pulse operation signal or solenoid valve used to operate the diaphragm valve fails, and thus a rubber plate installed between the body and cover of the diaphragm valve can be turned (moved forward) after being instantaneously moved backward. Accordingly, dedusting work can be manually performed according to the determination of a manager, and thus the dust collector diaphragm valve can prevent an emergency shutdown during the operation of a dust collector and can also prevent a filter from reaching a limit differential pressure, thereby preventing the lifespan of the filter from being shortened.
1. A dust collector diaphragm valve capable of performing manual emergency operation, the dust collector diaphragm valve comprising: a body configured such that an air inlet part and an air outlet part are formed in two directions as an internal air flow path and a passage are connected to each other; a cover configured such that a pressure vent is formed on one side thereof as an internal air flow path and a passage are connected to each other; a rubber plate configured to be installed between the body and the cover so that high-pressure air supplied through the air inlet part simultaneously fills both the air flow paths, forms equal pressure, and closes a passage of the air outlet part; a solenoid valve configured to be installed behind the cover so that an internal plunger instantaneously opens the pressure vent while being returned (moved forward) by elastic repulsive force after being instantaneously moved backward in response to a pulse operation signal, thereby dropping internal pressure in the air flow path; and a spring configured to be installed at a center of a back side of the rubber plate in order to return (move forward) the rubber plate until an operation of the solenoid valve is stopped and to thus make the rubber plate close the air outlet part; wherein an emergency operation switch configured to perform control so that the rubber plate is instantaneously moved backward and then returned (moved forward) by forcibly discharging high-pressure air inside the air flow path in the cover irrespective of the pressure vent whenever the emergency operation switch is manually pressed when a pulse operation signal and the solenoid valve fail and thus breaking equal pressure is installed on one side of the cover.
2. The dust collector diaphragm valve of claim 1 , wherein the emergency operation switch is installed on one side of a periphery of the cover spaced apart from the pressure vent by a predetermined distance so that the air flow path of the cover and the passage can be connected to each other.
3. The dust collector diaphragm valve of claim 1 , wherein the emergency operation switch comprises:
a body configured to be screwed through one side of the cover, and to have a through hole, in which a stop protrusion is formed inside the through hole at an intermediate height of the through hole, so that the air flow path and the passage can be connected to each other; a forceful pressure vent configured to be installed on one side of the body at the intermediate height of the body, and to always open the through hole; a coil spring configured to be inserted through a top of the through hole, and to be seated on a top of the stop protrusion; an actuation shaft configured to be disposed to pass through the top of the through hole, and provided with a head part on a bottom of the actuation shaft in order to control an amount of air to be discharged by means of pressing force while selectively opening and closing the passage depending on whether a lower portion of the actuation shaft comes into close contact with a bottom of the stop protrusion; a stop ring configured to be coupled to the actuation shaft at an intermediate height of the actuation shaft through a top of the body, and to receive elastic repulsive force of the coil spring and lift the actuation shaft when pressing force is released while the stop ring is pressing the coil spring; a sleeve configured to be inserted into an upper portion of the through hole, and to guide the actuation shaft through vertical movement while increasing tightness; and a push button configured to be fastened to an upper end of the actuation shaft.
4. The dust collector diaphragm valve of claim 3 , wherein an O-ring-shaped packing configured to increase tightness when it comes into contact with a bottom of the stop protrusion is coupled to a central circumference of a top surface of the head part.
5. The dust collector diaphragm valve of claim 3 , wherein the forceful pressure vent is connected to a passage of the through hole at a right angle at a location above a height of the stop protrusion.
6. The dust collector diaphragm valve of claim 3 , wherein the actuation shaft is configured to maintain a predetermined interval in order to prevent circumferential surfaces from coming into contact with each other when the actuation shaft passes through the stop protrusion via a bottom of the through hole.
7. The dust collector diaphragm valve of claim 3 , wherein the head part is configured to limit upward movement of the actuation shaft in such a manner that a top surface of the head part is caught on a bottom of the stop protrusion while maintaining a predetermined interval in order to prevent circumferential surfaces from coming into contact with each other when the head part passes through the stop protrusion via a bottom of the through hole.