CN210423899U - Normally closed type electromagnetic valve control structure of electromagnetic proportional valve - Google Patents

Abstract

A normally closed electromagnetic valve control structure of an electromagnetic proportional valve is a normally open electronic proportional valve, which is internally provided with an air inlet electromagnetic valve and an air outlet electromagnetic valve, wherein the air inlet electromagnetic valve is provided with an air inlet, an air outlet and an air outlet, and the air outlet electromagnetic valve is also provided with an air inlet, an air outlet and an air outlet; the air inlet electromagnetic valve is of a normally closed type, the air outlet electromagnetic valve is of a normally closed type, when power failure occurs, the air outlet electromagnetic valve can be restored to be in a closed state of the air inlet, the air outlet is communicated with the air outlet, the pressure of fluid in an air pressure control chamber in the normally open type electric control proportional valve can be discharged from the air outlet and the air outlet, and the pressure of the fluid in the air pressure control chamber can be relieved when the power failure occurs.

Description

Normally closed type electromagnetic valve control structure of electromagnetic proportional valve

Technical Field

The utility model relates to a normally closed type solenoid valve control structure of electromagnetism proportional valve, especially one kind can see through the characteristic of electric power excitation normally closed type and normally open type, lets inside fluid pressure can be under the outage state, can realize the pressure release and have safe purpose concurrently.

Background

Electrically controlled proportional valve is a fluid flow path control device commonly used in industrial equipment, and referring to fig. 3, a normally open electrically controlled proportional valve (90) is usually provided with: a normally closed type intake solenoid valve (91) for intake and a normally closed type exhaust solenoid valve (92) for exhaust, both of which are normally closed, that is, the valve ports of the solenoid valves are closed and do not flow when not energized;

when the air inflow of the two solenoid valves is adjusted through an externally connected controller, the pressure of an air pressure control chamber (93) in the normally open solenoid valve (90) can be changed, the air pressure control chamber (93) can drive an air pressure chamber (94) to open and close, and the required outlet pressure is formed by controlling the flow of fluid (914) flowing through the air pressure chamber (94);

more specifically, referring to fig. 4, the normally closed intake solenoid valve (91) of the prior art is generally provided with an air guide valve rear cover (910), an air inlet (911), an air outlet (912), and an air outlet (913), and when the valve is not energized, the fluid (F) enters from the air inlet (911) and is blocked from flowing through by the air guide valve rear cover (910);

referring to fig. 5, when the power is turned on, the rear cover (910) of the air guide valve is opened, so that the fluid (914) that is originally blocked passes through and is output through the air outlet (912);

referring to fig. 6, when the energization is stopped, the rear cover 910 of the air guiding valve is closed, and the fluid 914 is partially discharged from the air outlet 913 and partially blocked at the air inlet 911; the structure and the related operations of the other normally closed exhaust solenoid valve (92) and energization excitation are all the same as those of the normally closed intake solenoid valve (91), and therefore, the description is not repeated.

When the two electromagnetic valves are both designed to be normally closed, the two electromagnetic valves are kept to be normally closed after being in a power-off state, and the internal pressure of the air pressure control chamber (93) is kept in an inflation state, so that the opening degree of the air pressure chamber (94) is kept, and the flow of the air pressure control chamber (93) is further controlled to form outlet pressure;

however, the working state has a safety problem, because the normally-open electrically-controlled proportional valve (90) after power failure still keeps a full pressure state, if an unexpected state such as power failure occurs, the device cannot be released by emergency pressure relief, and the situation that the electrically-controlled proportional valve fails or cannot be immediately eliminated is easily caused.

Disclosure of Invention

In view of the design of the double normally closed type in the existing solenoid valve, the safety purpose actually to be achieved by the industry is still insufficient; therefore, an object of the present invention is to provide a solenoid valve, which can completely discharge the internal pressure when the power is off, so that the problem of failure caused by emergency power failure can be improved.

To achieve the above object, the present invention discloses a normally closed electromagnetic valve control structure of an electromagnetic proportional valve, which comprises: the normally open type electric control proportional valve is internally provided with an air inlet electromagnetic valve and an air outlet electromagnetic valve, the air inlet electromagnetic valve is provided with an air inlet, an air outlet and an air outlet, and the air outlet electromagnetic valve is provided with an inlet, an air outlet and an air outlet; and the air inlet electromagnetic valve is of a normally closed type, the air outlet electromagnetic valve is of a normally closed type, when power failure occurs, the air inlet can be recovered to be in a closed state by the air outlet electromagnetic valve, the air outlet is communicated with the air outlet, and fluid pressure in an air pressure control chamber in the normally open type electric control proportional valve can be exhausted from the air outlet and the air outlet, so that the pressure of the fluid in the air pressure control chamber can be relieved when the power failure occurs.

The secondary objective of the present invention is to provide the exhaust solenoid valve with a normal energized and excited state.

A secondary object of the present invention is to provide an intake solenoid valve that is in an unenergized state in a normal state.

A secondary object of the present invention is to provide a normally open intake solenoid valve.

A secondary object of the present invention is to provide a normally open intake solenoid valve which is in a normal energized state.

Compared with the prior art, the utility model provides a normally closed type solenoid valve control structure of electromagnetism proportional valve, when the outage state, can discharge internal pressure completely, make it under the condition of emergency power-off, easily cause the problem of trouble to obtain improving.

Drawings

Fig. 1 is a schematic view of a normally closed electromagnetic valve control structure of an electromagnetic proportional valve according to an embodiment of the present invention in a normal operation.

Fig. 2 is a schematic diagram of a normally closed electromagnetic valve control structure of an electromagnetic proportional valve according to an embodiment of the present invention during exhaust and power failure.

Fig. 3 is a schematic diagram of a prior art structure.

Fig. 4 is a schematic diagram of a normally closed intake solenoid valve in a prior art in a normal operation.

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

Fig. 6 is a schematic diagram of a normally closed intake solenoid valve of the prior art when energized.

Description of reference numerals:

10-normally open type electric control proportional valve

11-Voltage control Chamber

12-pneumatic bin

20-air inlet electromagnetic valve

P1-air inlet

A1-Outlet

R1-exhaust port

30-exhaust solenoid valve

P2-air inlet

A2-Outlet

R2-exhaust port

F-fluid

90-normally open type electric control proportional valve

91-normally closed type air inlet electromagnetic valve

910-air guide valve rear cover

911-air intake

912-air outlet

913-exhaust port

914-fluid

92-normally closed type exhaust electromagnetic valve

93-pneumatic control chamber

94-pneumatic chamber

Detailed Description

The embodiment of the utility model discloses electromagnetism proportional valve's closed type solenoid valve control structure, including: a normally open type electrically controlled proportional valve 10, wherein the left and right sides inside the normally open type electrically controlled proportional valve 10 are respectively provided with: an air inlet solenoid valve 20 and an air outlet solenoid valve 30, wherein the air inlet solenoid valve 20 is internally provided with an air inlet P1, an air outlet A1 and an air outlet R1, and the air outlet solenoid valve 30 is internally provided with an air inlet P2, an air outlet A2 and an air outlet R2;

the intake solenoid valve 20 is normally closed, and the exhaust solenoid valve 30 is also normally closed, and here, the normally closed type can be understood to interrupt the flow paths of the respective air flows when energization and excitation are not performed.

The embodiment of the utility model discloses normally closed solenoid valve control structure of electromagnetic proportional valve when the outage state takes place, this exhaust solenoid valve 30 can resume earlier into closed condition, and this gas outlet A2 is linked together with this gas vent R2, and can let a fluid F pressure in the atmospheric control room 11 in this normally open type automatically controlled proportional valve 10, discharge via this gas outlet A2 and this gas vent R2, make inside this fluid F pressure can be when the outage, make the inside purpose that can realize the pressure release of structure, can normally function under the circumstances of outage suddenly, also can keep the holistic security of mechanism.

In the above structure, under normal conditions, the exhaust solenoid valve 30 is in an energized state, the fluid F in the air pressure control chamber 11 is kept in a pressure-stabilized state by the normally closed exhaust solenoid valve 30, using the closing of the air outlet a2 and the air outlet R2 to regulate the pressure of the fluid F in the air pressure control chamber 11, and the intake solenoid valve 20 is in an unenergized state.

The intake solenoid valve 20 can be changed from a normally closed type to a normally open type, and the exhaust solenoid valve 30 is also a normally closed type, and when the intake solenoid valve 20 is a normally open type, it is changed to a power-on and magnetic-exciting state in a normal state, so as to achieve the purpose of power-off and pressure relief.

To sum up, the embodiment of the utility model discloses a normally closed type solenoid valve control structure of electromagnetism proportional valve sees through air inlet solenoid valve 20 and exhaust solenoid valve 30 originally, will be inside the solenoid valve of two normally closed types originally, see through the route that changes the circulation of original fluid F, cooperation electric power excitation makes original solenoid valve inner structure need not change by a wide margin, also can see through the purpose that the outage realized the pressure release, has further increased the security in the whole use, and more permeable more moves to a normally open type cooperation normally closed type solenoid valve, reaches aforementioned purpose.

The structure, features and effects of the present invention have been described in detail above according to the embodiment shown in the drawings, and the above description is only the preferred embodiment of the present invention, but the present invention is not limited to the implementation scope shown in the drawings, and all changes made according to the idea of the present invention or equivalent embodiments modified to the same changes should be considered within the protection scope of the present invention when not exceeding the spirit covered by the description and drawings.

Claims (5)

1. The normally closed type electromagnetic valve control structure of the electromagnetic proportional valve is characterized in that: the method comprises the following steps: an electrically controlled normally open proportioning valve (10) having in its interior: an air inlet solenoid valve (20) internally provided with an air inlet (P1), an air outlet (A1) and an air outlet (R1); and an exhaust solenoid valve (30) provided therein with an air inlet (P2), an air outlet (A2), and an exhaust port (R2); the air inlet solenoid valve (20) is of a normally closed type, the air outlet solenoid valve (30) is of a normally closed type, the air inlet (P2) in the air outlet solenoid valve (30) is used for air exhaust, the air outlet (A2) in the air outlet (R2) is used for air exhaust, when power failure occurs, the air inlet (P2) can be recovered to be in a closed state by the air outlet (A2) and the air outlet (R2) are communicated, the pressure of fluid (F) in an air pressure control chamber (11) in the normally open type electric control proportional valve (10) can be discharged from the air outlet (A2) and the air outlet (R2), and the pressure of the fluid (F) in the normally open type electric control proportional valve can be relieved when the power failure occurs.

2. The normally closed type solenoid valve control structure of a solenoid proportional valve according to claim 1, wherein the exhaust solenoid valve (30) is normally energized.

3. The normally closed type solenoid valve control structure of a solenoid proportional valve according to claim 1, wherein the intake solenoid valve (20) is normally in an unenergized and energized state.

4. The normally closed type solenoid valve control structure of a solenoid proportional valve according to claim 1, wherein the intake solenoid valve (20) is normally open type.

5. The normally closed type solenoid valve control structure of a solenoid proportional valve according to claim 4, wherein when the intake solenoid valve (20) is normally open, it is normally energized.

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