CN111623164A - Normally open type electromagnetic valve control structure of electromagnetic proportional valve - Google Patents

Abstract

The invention discloses a normally open electromagnetic valve control structure of an electromagnetic proportional valve, which is a normally open electronically controlled proportional valve. an air inlet, an air outlet and an exhaust port, the exhaust solenoid valve also has an air inlet, an air outlet and an exhaust port; the intake solenoid valve is a normally closed type, and the exhaust solenoid valve The valve is a normally open type. When a power failure occurs, the exhaust solenoid valve will return to the open state of the air inlet, and the air inlet is connected to the air outlet, and the normally open electronically controlled proportional valve can be opened. The fluid in an air pressure control chamber inside is discharged from the air inlet and the air outlet, so that the pressure of the fluid in the interior can be released when the power is turned off.

Description

Control structure of normally open solenoid valve of solenoid proportional valve

technical field

The present invention relates to the control structure of the normally open solenoid valve of the solenoid proportional valve, in particular, it refers to the characteristics of normally closed type and normally open type that can be excited by electric power, so that the internal fluid pressure can be in a power-off state, and can achieve pressure relief and both for security purposes.

Background technique

The electronically controlled proportional valve is a fairly common fluid flow path control device in industrial equipment. Please refer to Figure 3. A normally open electronically controlled proportional valve 90 is usually provided with: The gas solenoid valve 91 and the normally closed type exhaust solenoid valve 92 for exhausting, the aforementioned two solenoid valves are both normally closed type, that is, the valve port of the solenoid valve is in a state of being closed and not flowing when it is not energized;

When the two solenoid valves adjust the intake air volume through the externally connected controller, the pressure of the air pressure control chamber 93 in the normally open solenoid valve 90 can be changed, and the air pressure control chamber 93 can drive the air pressure chamber 94 to open and close By controlling the flow rate of the fluid 914 flowing through the pneumatic chamber 94, the required outlet pressure is formed.

In more detail, please refer to FIG. 4 again, the normally closed intake solenoid valve 91 used in the prior art is provided with an air guide valve rear cover 910 , an air inlet 911 , an air outlet 912 and an exhaust, respectively. Generally, when the port 913 has not been energized and excited, after the fluid F enters through the air inlet 911 , the flow of the fluid F will be blocked by the air guide valve rear cover 910 .

Please refer to FIG. 5 , when the excitation is performed, the back cover 910 of the air guide valve will be in an open state, so that the originally blocked fluid 914 passes through and is output through the air outlet 912 .

Please refer to FIG. 6 again, and when the excitation is stopped, the air guide valve back cover 910 will be closed, and the fluid 914 will be partially discharged from the exhaust port 913 and partially blocked from the intake port 911 ; The structure of the other normally closed exhaust solenoid valve 92 and the related operation of the energization excitation are identical to the normally closed intake solenoid valve 91, so they will not be repeated.

When the aforementioned two solenoid valves are both normally closed, they will remain normally closed after the power is turned off. At this time, the pressure inside the air pressure control chamber 93 will maintain the inflated state, so the air pressure chamber 94 will also be maintained. The degree of opening, and then control the flow of the air pressure control chamber 93 to form the outlet pressure;

However, there is a safety problem in this working state, because the normally open electronically controlled proportional valve 90 will remain in a full pressure state after a power failure. The electronically controlled proportional valve is faulty or cannot be eliminated immediately.

SUMMARY OF THE INVENTION

In view of the double normally closed design in the existing solenoid valve, there are still deficiencies in the actual purpose of safety in the industry; therefore, the main purpose of the present invention is to develop a solenoid valve that can be used when the solenoid valve is in a power-off state. The internal pressure can be completely discharged, so that the problem of easy failure can be improved in the case of emergency power failure.

In order to achieve the above purpose, the present invention is a normally open solenoid valve control structure of an electromagnetic proportional valve, which comprises: a normally open electronically controlled proportional valve, which has an intake solenoid valve and an exhaust solenoid valve inside, The intake solenoid valve is provided with an intake port, an air outlet and an exhaust port, and the exhaust solenoid valve is provided with an inlet, an air outlet and an exhaust port; and the intake solenoid valve is a normally closed type , and the exhaust solenoid valve is a normally open type. When a power failure occurs, the exhaust solenoid valve will return to the open state of the air inlet, and the air inlet is connected to the air outlet, and can make the air inlet open. The pressure of a fluid in an air pressure control chamber in the normally open electronically controlled proportional valve is discharged from the air inlet and the air outlet, so that the internal pressure of the fluid can be released when the power is cut off.

The secondary purpose of the present invention is that the exhaust solenoid valve is in an electrified excitation state under normal conditions.

The secondary purpose of the present invention is that the intake solenoid valve is in a non-energized and excited state under normal conditions.

The present invention also proposes a normally open electromagnetic valve control structure of an electromagnetic proportional valve, comprising: a normally open electronically controlled proportional valve, the interior of which is provided with:

an air intake solenoid valve, which is internally provided with an air inlet, an air outlet and an air outlet;

and an exhaust solenoid valve, which is internally provided with an air inlet, an air outlet and an exhaust port;

Wherein, the intake solenoid valve is a normally open type, and the exhaust solenoid valve is a normally open type. When a power failure occurs, the exhaust solenoid valve returns to the open state of the intake port, and the intake port and the exhaust port It is connected and can make a fluid pressure in an air pressure control chamber in the normally open electronically controlled proportional valve discharged from the air inlet and the air outlet, so that the internal fluid pressure can be de-energized to achieve pressure relief.

The secondary purpose of the present invention is that, when the intake solenoid valve is a normally open type, it is in an electrified excitation state in a normal state.

When the present invention is used in the state of power failure, the exhaust solenoid valve will be restored to the state of opening the air inlet first, and the air inlet and the air outlet are connected, and the normally open electronically controlled proportional valve can be opened. A fluid pressure in an air pressure control chamber inside is discharged through the air inlet and the air outlet, and the air pressure chamber is closed at the same time, so that the internal fluid pressure can be released when the power is turned off, so that the interior of the structure can achieve the purpose of pressure relief, so that the In the case of sudden power failure, the overall safety of the organization can be maintained.

Description of drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention.

FIG. 1 is a schematic diagram of the present invention under normal operation.

FIG. 2 is a schematic diagram of the present invention during exhaust and power failure.

FIG. 3 is a schematic structural diagram of the prior art.

FIG. 4 is a schematic diagram of the prior art when the normally closed intake solenoid valve operates in a normal state.

FIG. 5 is a schematic diagram of the prior art when the normally closed intake solenoid valve is energized and excited.

FIG. 6 is a schematic diagram of the prior art when the normally closed intake solenoid valve is not energized and excited.

Description of reference numbers:

(10)...Normally open electronically controlled proportional valve

(11)...voltage control room

(12)...Pressure Chamber

(20)...Intake solenoid valve

(P1)...inlet

(A1)...Outlet

(R1)...Exhaust port

(30)...Exhaust solenoid valve

(P2)...Air intake

(A2)...Outlet

(R2)...Exhaust port

(F)...fluid

(90)...Normally open electronically controlled proportional valve

(91)...normally closed intake solenoid valve

(910)...Pilot valve rear cover

(911)...Inlet

(912)...Outlet

(913)...Exhaust port

(914)...Fluid

(92)...normally closed exhaust solenoid valve

(93)...Air pressure control room

(94)...Pressure chamber

Detailed ways

Generally according to the present invention, the best feasible embodiment is described in detail with the accompanying drawings 1 and 2, so as to increase the understanding of the present invention, and the drawings in the present invention use a three-port two-position solenoid valve as an implementation The examples are used for understanding and explanation, and are not limited thereto.

The present invention is a normally open electromagnetic valve control structure of an electromagnetic proportional valve, comprising: a normally open electrically controlled proportional valve 10, the left and right sides inside the normally open electrically controlled proportional valve 10 are respectively provided with : an intake solenoid valve 20 and an exhaust solenoid valve 30, the intake solenoid valve 20 is provided with an intake port P1, an air outlet A1 and an exhaust port R1 inside, and the exhaust solenoid valve 30 has an interior Then there is an air inlet P2, an air outlet A2 and an air outlet R2.

The aforementioned intake solenoid valve 20 is of a normally closed type, while the exhaust solenoid valve 30 is of a normally open type. The aforementioned normally closed type can be understood as disconnecting the flow paths of each ventilation when no electrical excitation is applied, while the normally open type is It can be understood that when the electric excitation is not applied, the flow paths of each ventilation are connected.

In the present invention, when the power-off state occurs, the exhaust solenoid valve 30 will first restore to the open state of the air inlet P2, and the air inlet P2 and the air outlet A2 are in communication, and can make the normally open The pressure of a fluid F in an air pressure control chamber 11 in the type electronically controlled proportional valve 10 is discharged through the air inlet P2 and the air outlet A2, and the air pressure chamber 12 is closed at the same time, so that the internal pressure of the fluid F can be cut off at the same time. At the same time, the internal structure of the structure can achieve the purpose of pressure relief, so that the overall safety of the mechanism can still be maintained in the event of a sudden power failure.

Under the normal state of the aforementioned structure, the exhaust solenoid valve 30 is in the state of electrification and excitation, and the fluid F in the air pressure control chamber 11 will be closed by the valve port of the normally open exhaust solenoid valve 30, so that the fluid F stops at the exhaust solenoid valve 30. At the air inlet P2 of the air solenoid valve 30 , the air pressure in the air pressure control chamber 11 is maintained in a stable state by this manipulation, and the air intake and exhaust valve 20 is in an unenergized state at this time.

In another embodiment, the aforementioned intake solenoid valve 20 can also be replaced from a normally closed type to a normally open type, and the exhaust solenoid valve 30 is also normally open, and when the intake solenoid valve 20 is normally open , in normal state, it must be changed to the state of energization and excitation, in order to achieve the purpose of power-off and pressure relief.

To sum up, the normally open solenoid valve control structure of the electromagnetic proportional valve of the present invention changes the original double normally closed solenoid valve into one normally closed type and one normally closed type through the original intake solenoid valve 20 and exhaust solenoid valve 30 . Open type, so that the original structure does not need to be re-modified, that is, the purpose of power-off and pressure relief can be achieved, which further increases the overall safety in use, and can be changed to double normally-open type, which can also achieve the aforementioned purpose. .

Claims (5)

1. A normally open solenoid valve control structure of an electromagnetic proportional valve, comprising: a normally open electrically controlled proportional valve (10), the interior of which is provided with: an air intake solenoid valve (20), an air inlet (P1), an air outlet (A1) and an air outlet (R1) are arranged inside; and an exhaust solenoid valve (30), which is internally provided with an air inlet (P2), an air outlet (A2) and an exhaust port (R2); It is characterized in that: the intake solenoid valve (20) is of a normally closed type, the exhaust solenoid valve is of a normally open type, and when a power failure occurs, the exhaust solenoid valve (30) is restored to the intake port (P2) In the open state, the air inlet (P2) is communicated with the air outlet (A2), and can allow a fluid (F) in a pneumatic control chamber (11) in the normally open electronically controlled proportional valve (10) The pressure is discharged from the air inlet (P2) and the air outlet (A2), so that the internal pressure of the fluid (F) can be released when the power is cut off. 2 . The normally open solenoid valve control structure of an electromagnetic proportional valve according to claim 1 , wherein the exhaust solenoid valve ( 30 ) is in an electrified excitation state in a normal state. 3 . 3 . The normally open solenoid valve control structure of an electromagnetic proportional valve according to claim 1 , wherein the intake solenoid valve ( 20 ) is in a non-electric excitation state in a normal state. 4 . 4. A normally open solenoid valve control structure of an electromagnetic proportional valve, comprising: a normally open electrically controlled proportional valve (10), the interior of which is provided with: an air intake solenoid valve (20), an air inlet (P1), an air outlet (A1) and an air outlet (R1) are arranged inside; and an exhaust solenoid valve (30), which is internally provided with an air inlet (P2), an air outlet (A2) and an exhaust port (R2); It is characterized in that: the intake solenoid valve (20) is of a normally open type, the exhaust solenoid valve is of a normally open type, and when a power failure occurs, the exhaust solenoid valve (30) is restored to the intake port (P2) In the open state, the air inlet (P2) is communicated with the air outlet (A2), and can allow a fluid (F) in a pneumatic control chamber (11) in the normally open electronically controlled proportional valve (10) The pressure is discharged from the air inlet (P2) and the air outlet (A2), so that the internal pressure of the fluid (F) can be released when the power is cut off. 5 . The normally open solenoid valve control structure of an electromagnetic proportional valve according to claim 4 , wherein when the intake solenoid valve ( 20 ) is normally open, it is in an electrified excitation state in a normal state. 6 .

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