JP2018028334A - Solenoid valve device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a solenoid valve device capable of securing airtightness on a primary side space without increasing the size of a solenoid.SOLUTION: A solenoid valve device 1 includes: a housing 11 having a valve passage 24 for connecting a primary port 21 and a secondary port 22; a valve body 12 provided in the housing, and for opening/closing the valve passage by moving between a closing position for closing the valve passage and an opening position for opening the valve passage; a first energization spring 15 for energizing the valve body to the closing position; a solenoid 3 for control for moving the valve body to the opening position by imparting an excitation force resisting an energization force of the first energization spring to the valve body when a current flows; a second energization spring 5 provided separately from the first energization spring, and for energizing the valve body to the closing position; and a solenoid 4 for assistance being excited and releasing the energization of the second energization spring with respect to the valve body when a current flows.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an electromagnetic valve device that opens and closes a valve passage.

  As an electromagnetic valve device that opens and closes a valve passage, an electromagnetic on-off valve, an electromagnetic pressure regulating valve, and the like are known. In the fuel injection valve of Patent Document 1, the plunger of the needle valve is biased in the valve closing direction by a spring. The plunger is provided with two electromagnets. The first electromagnet attracts the plunger in the valve opening direction when current flows through the electric coil, and the second electromagnet attracts the plunger in the valve closing direction when current flows through the electric coil. Yes. In the fuel injection valve, energization of the electric coils of the first electromagnet and the second electromagnet is started in the closed state, and when the valve is opened, energization of the electric coil of the second electromagnet is stopped and the valve body is pulled up. ing.

JP 2000-2163 A

  In the fuel injection valve of Patent Document 1, energization of the electric coil of the second electromagnet is started in the closed state, and the plunger is pushed in the valve closing direction by the exciting force of the second electromagnet together with the biasing force of the spring. . Therefore, the airtightness of the primary side space can be ensured by continuously supplying a current to the second electromagnet in the valve closed state.

  However, if a current is continuously supplied to the second electromagnet, the energy consumption increases as a matter of course. In order to avoid such a situation, it is conceivable to increase the urging force of the urging spring. On the other hand, if the urging force of the urging spring is increased, it is possible to suppress energy consumption, but the exciting force that should be generated by the first electromagnet when the valve is opened increases. If it does so, the number of turns of the electric coil of the 1st electromagnet, etc. will become large, and the 1st electromagnet will enlarge.

  Accordingly, an object of the present invention is to provide an electromagnetic valve device that can ensure the airtightness of the space on the primary port side without increasing the size of the solenoid.

  An electromagnetic valve device according to the present invention includes a housing having a valve passage that connects a primary port and a secondary port, and a closed position that is provided in the housing and that closes the valve passage and an open position that opens the valve passage. A valve body that moves to open and close the valve passage, a first urging spring that urges the valve body toward the closed position, and a resistance against the urging force of the first urging spring when an electric current is passed. And a control solenoid for moving the valve body toward the open position, a second biasing spring provided separately from the first biasing spring and biasing the valve body toward the closed position, And an auxiliary solenoid that reduces the urging force of the second urging spring against the valve body when an electric current is passed.

  According to the present invention, the valve passage is more firmly closed by the biasing of the second biasing spring in addition to the biasing of the first biasing spring. Thereby, the airtightness of the space on the primary port side in the valve passage can be improved, and the fluid can be prevented from leaking from the space on the primary port side to the space on the secondary port side. On the other hand, when the fluid is allowed to flow from the primary port to the secondary port by opening the valve passage, an electric current is supplied to the auxiliary solenoid to reduce the urging force of the second urging spring against the valve body by the auxiliary solenoid. The valve closing force acting on the body can be reduced. As a result, the control solenoid can move the valve body toward the open position with a smaller force than when no auxiliary solenoid is provided, and the control solenoid can be prevented from being enlarged.

  In the above invention, the auxiliary solenoid may release the bias of the second bias spring with respect to the valve body.

  According to the present invention, the urging of the second urging spring with respect to the valve body can be released by passing a current through the auxiliary solenoid. As a result, the control solenoid can move the valve body toward the open position in a state where the urging force of the second urging spring is minimized (ie, zero).

  In the above invention, the valve body extends in a predetermined direction, the control solenoid is positioned on one side of the valve body in the predetermined direction, and the valve body is pushed to the other side of the predetermined direction to open the open position. The second urging spring urges the valve body to one side in the predetermined direction via the auxiliary solenoid to move the valve body toward the closed position, and the auxiliary solenoid It may be located on the other side of the valve body in the predetermined direction and may be separated from the valve body to release the urging force of the second urging spring.

  If the said structure is followed, it can suppress that an electromagnetic valve apparatus is extended | stretched only to the axial direction one side or the other side with respect to a housing.

  In the above invention, the auxiliary solenoid has a fixed magnetic pole, a biasing rod that is a movable iron core, and a solenoid coil, and the biasing rod is separated from the fixed magnetic pole toward the closed position. Arranged and urged by the second urging spring to push the valve body toward the closed position, and when the solenoid coil is energized, the fixed magnetic pole and the urging rod And the biasing rod may be attracted to the fixed magnetic pole to release the biasing.

  According to the above configuration, the bias of the second biasing spring is released by the fixed magnetic pole attracting the biasing rod. After the fixed magnetic pole attracts the energizing rod, the attracted state can be maintained even at a low current value, so the power consumption of the auxiliary solenoid at the time of deenergizing is for the electromagnetic proportional solenoid that generates the excitation force according to the current. Compared to the case of adopting a solenoid, it can be kept low.

  In the above invention, the control solenoid may be an electromagnetic proportional solenoid that presses the valve body with an exciting force corresponding to a value of a current passed therethrough.

  If the said structure is followed, since the position of a valve body can be controlled by the solenoid for control, the pressure of the secondary pressure which flows into the secondary port side can be adjusted.

  In the above invention, the second biasing spring may be disposed between the biasing rod and the fixed magnetic pole.

  If the said structure is followed, the 2nd biasing spring will be arrange | positioned between a fixed magnetic pole and a biasing rod, and will be incorporated in the auxiliary solenoid. Therefore, the second urging spring can have both the function of urging the valve body toward the closed position and the function of returning the urging rod to the initial position in contact with the valve body. Thereby, the number of parts can be reduced.

  According to the present invention, the airtightness of the primary side space can be ensured without increasing the size of the solenoid.

It is sectional drawing which shows the structure of the solenoid valve apparatus which concerns on embodiment of this invention. It is sectional drawing which shows the structure of the control valve mechanism with which the solenoid valve apparatus of FIG. 1 is equipped. It is sectional drawing which shows the structure of the solenoid for control with which the solenoid valve apparatus of FIG. 1 is equipped. It is sectional drawing which shows the structure of the auxiliary solenoid with which the solenoid valve apparatus of FIG. 1 is equipped.

  Hereinafter, an electromagnetic valve device 1 according to an embodiment of the present invention will be described with reference to the drawings. In addition, the concept of the direction used in the following description is used for convenience in description, and does not limit the direction of the configuration of the invention in that direction. Moreover, the electromagnetic valve device 1 described below is only one embodiment of the present invention. Therefore, the present invention is not limited to the embodiments, and additions, deletions, and changes can be made without departing from the spirit of the invention.

[Solenoid valve device]
A solenoid valve device 1 shown in FIG. 1 opens and closes a passage that connects devices, and adjusts the pressure of a fluid (for example, gas or liquid) that flows through the passage to downstream devices. To supply. More specifically, the electromagnetic valve device 1 is a normally closed electromagnetic proportional valve device that adjusts the pressure of the fluid in accordance with the value of the current flowing therethrough. Moreover, the solenoid valve device 1 closes the passage by stopping the current flowing therethrough so that the fluid is not supplied to the downstream equipment. The electromagnetic valve device 1 configured as described above includes a control valve mechanism 2, a control solenoid 3, an auxiliary solenoid 4, and a valve closing spring 5.

<Control valve mechanism>
The control valve mechanism 2 shown in FIG. 2 is a part for adjusting the pressure of the fluid passing therethrough, and includes a housing 11, a valve body 12, a fixing member 13, a spring receiving member 14, and a control spring 15. Two seal members 16 and 17 are provided. Although not described in detail, the housing 11 includes a plurality of portions as shown in FIG. 2, and extends along a predetermined axis L1. Further, the housing 11 has a primary port 21, a secondary port 22, and a valve body hole 23. The primary port 21 is connected to a storage device such as a high-pressure tank, and the secondary port 22 is Connected to fluid consuming devices such as fuel cells and engines. These two ports 21 and 22 are formed as a primary port 21 and a secondary port 22 in order from one end in the axial direction of the housing 11. Further, these two ports 21 and 22 are both connected to the valve element hole 23.

  The valve body hole 23 extends along the axis L1 and penetrates the housing 11 in the axial direction (that is, the direction along the axis L1). Further, the valve body hole 23 is connected to the primary port 21 and the secondary port 22 in a region on one side in the axial direction, and the region constitutes a valve passage 24. The valve passage 24 has a smaller diameter on the secondary port 22 side than on the primary port 21 side. That is, a step is formed on the inner peripheral surface of the housing 11 at a portion where the portion on the primary port 21 side and the portion on the secondary port 22 side of the valve passage 24 are connected, and the step forms the valve seat 25. ing. Further, the valve body 12 is inserted into the valve body hole 23 so as to be seated on the valve seat 25.

  The valve body 12 has a generally cylindrical shape, and extends along the axis thereof and is formed in a long shape. The valve body 12 having such a shape is inserted through the valve body hole 23 along the axis L1 and extends in the axial direction which is a predetermined direction. Further, the outer diameter of the intermediate portion of the valve body 12 is formed to be substantially the same as the hole diameter of the intermediate portion of the valve body hole 23, and the intermediate portion of the valve body 12 slides on the inner peripheral surface of the housing 11. It is supported. In addition, a thrust bearing 18 is externally mounted on one end of the valve body 12 in the axial direction, and the valve body 12 is supported on the inner peripheral surface of the housing 11 via the thrust bearing 18. Thus, the valve body 12 is supported by the housing 11 at at least two locations, and can slide in one and the other in the axial direction.

  Further, the valve body 12 has a larger diameter on the other side in the axial direction than the portion on one side in the axial direction, and a valve portion 12a corresponding to the valve seat 25 is formed in a tapered shape. Yes. That is, the valve portion 12a is formed so as to increase in diameter from one side in the axial direction toward the other side. The valve portion 12a having such a shape is seated on the valve seat 25 when the valve body 12 moves in one axial direction and reaches the closed position, and the valve body 12 moves from the closed position to the other axial direction. The valve passage 24 is opened away from the seat 25. Thus, the valve body 12 moves between the open position and the closed position where the valve passage 24 is opened, and opens and closes the valve passage 24. The valve body 12 is provided with a fixing member 13 in the vicinity of the other end in the axial direction.

  The fixing member 13 is formed in a substantially bottomed cylindrical shape, and has a fitting hole portion 13a that is an inner hole around the axis. The other end of the valve body 12 in the axial direction is fitted in the fitting hole 13a. A flange portion 13b is formed on the outer peripheral surface of the fixing member 13 over the entire circumference in the circumferential direction, and the flange portion 13b protrudes outward in the radial direction. Further, the housing 11 has an inner end face at a position facing the flange portion 13b on the other axial side, and a spring receiving member 14 is disposed on the inner end face. The spring receiving member 14 is formed in a substantially annular shape, and is arranged away from the fixing member 13 on the other side in the axial direction. Thereby, there is a gap between the fixing member 13 and the spring receiving member 14, and the control spring 15 is disposed between them.

  The control spring 15, which is an example of a first urging spring, is a so-called compression coil spring, and is disposed between the fixed member 13 and the spring receiving member 14 in a compressed state. That is, the control spring 15 has one end in the axial direction in contact with the fixing member 13 and the other end in the axial direction contacts with the spring receiving member 14. The control spring 15 arranged in this way urges the valve body 12 in the axial direction through the fixing member 13, that is, toward the closed position.

  Thus, the fixing member 13 and the control spring 15 are arranged on the other side in the axial direction of the valve body hole 23. In order to accommodate these, the other side in the axial direction of the valve body hole 23 is formed to have a larger diameter than the middle part of the valve body hole 23. That is, a space 26 having an enlarged diameter is formed on the other side in the axial direction of the valve body hole 23. In addition, a pressure feedback passage 27 is formed in the housing 11, and the space 26 (more specifically, a pressure feedback chamber 26 b described later) and the secondary port 22 are connected by the pressure feedback passage 27. Thereby, the fluid pressure flowing through the secondary port 22, that is, the secondary pressure is guided to the space 26. The space 26 accommodates the first seal member 16.

  The first seal member 16 is a diaphragm-type seal member, and the outer peripheral edge thereof is fixed to the housing 11. Moreover, the 1st seal member 16 has the recessed part 16a near the center, and the recessed part 16a is dented in the axial direction other side. The other end of the valve body 12 in the axial direction is inserted in the recess 16a, and the fixing member 13 is covered with the recess 16a in this state. Thereby, the recess 16 a of the first seal member 16 is sandwiched between the valve body 12 and the fixing member 13. Further, the first seal member 16 has a substantially annular convex portion 16b formed around the concave portion 16a. The convex portion 16b is formed so as to protrude to one side in the axial direction.

  The first seal member 16 having such a shape divides the space 26 into two chambers, specifically, an atmosphere release chamber 26a and a pressure feedback chamber 26b, and a fluid is provided between the atmosphere release chamber 26a and the pressure feedback chamber 26b. I can't go back and forth. The air release chamber 26 a is a room on the other side in the axial direction of the space 26, and is connected to an intermediate portion of the valve element hole 23. Further, a second seal member 17 is provided on the valve passage 24 side at an intermediate portion of the valve body hole 23. The second seal member 17 is interposed between the intermediate portion of the valve body 12 and the inner peripheral surface of the housing 11, so that fluid cannot go back and forth between the intermediate portion of the valve body hole 23 and the valve passage 24. It is sealed. As a result, the atmosphere release chamber 26 a is isolated from the pressure feedback chamber 26 b and the valve passage 24. On the other hand, an air release passage 28 is formed in the housing 11, the air release chamber 26 a is connected to the atmosphere by the air release passage 28, and the air release chamber 26 a is maintained at atmospheric pressure. Further, a pressure feedback chamber 26b is formed on the opposite side of the atmosphere release chamber 26a with respect to the first seal member 16.

  The pressure return chamber 26b is a room on the other side in the axial direction of the space 26, and is filled with the secondary pressure. That is, the pressure feedback chamber 26b is connected to the secondary port 22 through the pressure feedback passage 27 described above, and the secondary pressure is guided to the pressure feedback chamber 26b. The first seal member 16 receives the secondary pressure guided to the pressure feedback chamber 26b, and the valve body 12 receives a load corresponding to the pressure receiving area and the secondary pressure toward the closed position. Thereby, the valve body 12 moves toward the closed position according to the secondary pressure.

  Thus, the valve body 12 is urged by the control spring 15, and the first seal member 16 is pushed toward the closed position by receiving the secondary pressure of the pressure feedback chamber 26b. Thereby, the valve part 12a of the valve body 12 is seated on the valve seat 25, and the valve passage 24 is closed. In addition, a control solenoid 3 is provided at one end of the housing 11 in the axial direction so as to open the valve passage 24 and adjust the opening thereof.

<Solenoid for control>
The control solenoid 3 shown in FIG. 3 is a so-called electromagnetic solenoid, and is arranged along the axis L1. The solenoid 3 for control is arrange | positioned at the axial direction one side of the valve body 12, and it produces the exciting force according to the electric current sent, and pushes the valve body 12 toward the open position. The control solenoid 3 includes a connecting member 30, a solenoid coil 31, a spacer 32, a cap member 33, a movable iron core 34, a pressing rod 35, and a return spring 36. The connecting member 30 is formed in a substantially cylindrical shape, and is attached to the housing 11 so that the opening end on the other side in the axial direction abuts on one end in the axial direction of the housing 11. On the other hand, a solenoid coil 31 is externally provided on a portion on one side in the axial direction of the connecting member 30.

  The solenoid coil 31 is generally formed in a bottomed cylindrical shape, and includes a casing 31a, a bobbin 31b, and a coil wire 31c. The casing 31a is generally formed in a bottomed cylindrical shape, and a bobbin 31b is accommodated therein. The bobbin 31b has a main body portion formed in a substantially cylindrical shape, and flanges are formed on both sides in the axial direction of the main body portion. A coil wire 31c is wound around the body portion of the bobbin 31b between two flanges, and a control device (not shown) is connected to the coil wire 31c. The control device includes a ROM (Read Only Memory), a RAM (Random Access Memory), and the like (not shown) in addition to a CPU (Central Processing Unit). The ROM stores programs executed by the CPU, various fixed data, and the like. Programs executed by the CPU are stored in various storage media such as a flexible disk, a CD-ROM, and a memory card, and are installed in the ROM from these storage media. The RAM temporarily stores data necessary for program execution.

  The solenoid coil 31 configured as described above is externally mounted on the connecting member 30 with the opening end of the casing 31a facing the housing 11. Further, the solenoid coil 31 is disposed such that an opening end thereof is separated from one end in the axial direction of the housing 11, and a spacer 32 is interposed between the solenoid coil 31 and the housing 11. An insertion port 31d is formed at the bottom of the casing 31a of the solenoid coil 31, and a cap member 33 is provided on the casing 31a so as to close the insertion port 31d.

  The cap member 33 is formed in a bottomed cylindrical shape, and is provided in the casing 31a so that an opening end thereof faces the connecting member 30 and a portion on one side in the axial direction of the cap member 33 protrudes from the insertion port 31d. ing. The cap member 33 is formed by interposing a cylindrical member 40 made of a nonmagnetic material between the connecting member 30 and the cap member 33. It is arranged away from the connecting member 30. Further, a fixing nut 37 is provided on a portion on one side in the axial direction of the cap member 33. The fixing nut 37 is screwed onto the outer peripheral portion of the cap member 33, and can be rotated in one direction and the other direction around the axis. Further, by turning the fixing nut 37, the cap member 33 is displaced relative to the casing 31a in one and the other in the axial direction. A movable iron core 34 is accommodated in the cap member 33.

  The movable iron core 34 is formed in a substantially cylindrical shape and is slidably supported by the inner peripheral surface of the cap member 33. Further, the end surface on the other side in the axial direction of the movable iron core 34 is disposed so as to face the connecting member 30. When a current is passed through the coil wire 31c of the solenoid coil 31, an exciting force acts on the movable iron core 34, The movable iron core 34 is sucked toward the connecting member 30. A pressing rod 35 is inserted through the movable iron core 34 having such a function.

  The pressing rod 35 is a long member formed in a substantially columnar shape, and an intermediate portion thereof is inserted through the movable iron core 34. That is, the axially opposite side portions of the pressing rod 35, that is, the proximal end portion and the distal end portion protrude from the movable iron core 34, and the proximal end portion of the pressing rod 35 extends to the vicinity of the bottom portion of the cap member 33. . A thrust bearing 38 is externally provided on the proximal end portion of the pressing rod 35, and the proximal end portion of the pressing rod 35 is supported on the inner peripheral surface of the cap member 33 via the thrust bearing 38. . On the other hand, the tip side portion of the pressing rod 35 is inserted into the inner hole of the connecting member 30. Further, a thrust bearing 39 is externally mounted on the tip side portion of the pressing rod 35, and the tip side portion of the pressing rod 35 is supported on the inner peripheral surface of the connecting member 30 via the thrust bearing 39.

  In this way, the pressing rod 35 is supported by the cap member 33 and the connecting member 30 via the thrust bearings 38 and 39, respectively, and can be moved in one axial direction and the other by the thrust bearings 38 and 39. Further, the pressing rod 35 is arranged so that its axis substantially coincides with the axis L1. Similarly, the valve body 12 of the control valve mechanism 2 is also arranged so that its axis substantially coincides with the axis L1. One end of the valve body 12 in the axial direction protrudes from the housing 11 and reaches the inner hole of the connecting member 30. Thereby, the front-end | tip of the pressing rod 35 and the axial direction one end of the valve body 12 oppose. Further, a return spring 36 is provided on the movable iron core 34 in order to bring the tip of the pressing rod 35 into contact with one end in the axial direction of the valve body 12.

  The return spring 36 is a so-called compression coil spring, and is provided so as to be interposed between the movable iron core 34 and the cap member 33. More specifically, the movable iron core 34 has a spring receiving recess 34a at one end in the axial direction thereof. Further, the cap member 33 has a spring receiving portion 33a at a position facing the spring receiving concave portion 34a. That is, the spring receiving recess 34a and the spring receiving portion 33a are positioned so as to face each other in the axial direction, and the return spring 36 is interposed between them in a compressed state. Thereby, the movable iron core 34 is urged to the other side in the axial direction by the return spring 36. Further, the movable iron core 34 and the pressing rod 35 are configured so as not to move relative to each other in the axial direction. As a result, the urging force of the return spring 36 acts on the pressing rod 35 via the movable iron core 34, and the tip of the pressing rod 35 is pressed against and contacts the valve body 12.

  In the control solenoid 3 configured as described above, when a current flows through the solenoid coil 31, the movable iron core 34 is attracted to the connecting member 30 side by an exciting force corresponding to the flowed current. As a result, the pressing rod 35 is pulled in the other axial direction by the movable iron core 34, and the valve body 12 is pushed toward the open position with a force corresponding to the exciting force. By being pushed, the valve portion 12a of the valve body 12 is separated from the valve seat 25, and the valve passage 24 is opened. As a result, the fluid guided to the primary port 21 is guided to the secondary port 22 through the valve passage 24.

  Further, the valve body 12 is pushed in the other axial direction by the pressing force of the control solenoid 3 that applies an exciting force to the urging force of the return spring 36, and the secondary pressure of the pressure feedback chamber 26 b and the control spring 15 In response to the biasing force, it is pushed in one axial direction. That is, the pressing force of the control solenoid 3, the secondary pressure of the pressure feedback chamber 26b, and the urging force of the control spring 15 act against the valve body 12, and the valve body 12 , The secondary pressure, and the urging force are moved to a position where the forces acting on the valve body 12 are balanced. Thereby, the valve passage 24 is opened at an opening degree corresponding to the position of the valve body 12. More specifically, the valve passage 24 is opened at an opening degree that corresponds to the pressing force of the control solenoid 3 and corresponds to the value of the current passed through the control solenoid 3.

  For example, when the secondary pressure decreases with the pressing force (ie, exciting force) of the control solenoid being substantially constant, the force that pushes the valve body 12 in one axial direction decreases, so the valve body 12 moves in the other axial direction. Moving. Then, the opening degree of the valve passage 24 is increased, and the secondary pressure is increased. Thereby, the force which pushes the valve body 12 to an axial direction one becomes large, and the force which acts on the valve body 12 comes to balance again. On the other hand, when the secondary pressure increases, the force that pushes the valve body 12 in one axial direction increases, so that the valve body 12 moves in one axial direction. If it does so, the opening degree of the valve channel | path 24 will become small, and a secondary pressure will be pressure | voltage-reduced. Thereby, the force which pushes the valve body 12 to an axial direction one becomes small, and the force which acts on the valve body 12 comes to balance again.

  Thus, the valve body 12 moves according to the change in the secondary pressure, and adjusts the opening degree of the valve passage 24. Thereby, even if the lowered secondary pressure is increased or the increased secondary pressure is decreased, a constant pressure corresponding to the pressing force of the control solenoid 3 (that is, a constant pressure corresponding to the current flowing through the control solenoid 3). ).

  On the other hand, the biasing force of the return spring 36 is set smaller than the biasing force of the control spring 15. Therefore, when the current flowing through the control solenoid 3 is stopped, the force that pushes the valve body 12 in one axial direction is larger than the force that pushes the valve body 12 in the other axial direction, and the valve body 12 moves in one axial direction and reaches the closed position. . Thereby, the valve part 12a of the valve body 12 is seated on the valve seat 25, and the valve passage 24 is closed. At this time, if the force pressing the valve portion 12a against the valve seat 25 is small, the airtightness of the space on the primary port side of the valve passage 24 (that is, the primary side space) is lowered. On the other hand, when the force for pressing the valve portion 12a against the valve seat 25 is increased, a large force is required against the pressing force when the valve body 12 is moved toward the open position to open the valve passage 24. In view of such a situation, the electromagnetic valve device 1 includes an auxiliary solenoid 4 and a valve closing spring 5.

<Auxiliary solenoid and valve closing spring>
As shown in FIG. 4, the auxiliary solenoid 4 is provided on the other axial side of the control valve mechanism 2, on the other axial end of the housing 11 in the present embodiment. The auxiliary solenoid 4 is a so-called ON / OFF type electromagnetic solenoid, and is provided on the other side in the axial direction of the valve body 12, and is operated and stopped depending on whether or not a current flows. The auxiliary solenoid 4 having such a function is disposed along the axis L1, and includes a solenoid coil 41, a fixed magnetic pole 42, a guide member 43, a biasing rod 44, and a plate 46. Yes.

  The solenoid coil 41 is generally formed in a bottomed cylindrical shape, and includes a casing 41a, a bobbin 41b, and a coil wire 41c. The casing 41 a is generally formed in a bottomed cylindrical shape, and its open end is directed toward the housing 11. In addition, a convex portion 11 a that protrudes to the other side in the axial direction is formed around the axis L 1 at the other axial end portion of the housing 11, and the casing 41 a is fitted to the opening end by fitting the convex portion 11 a to the opening end. It is attached to the other end in the direction. In the casing 41a attached in this way, a bobbin 41b and a plate 46 made of a magnetic material are accommodated.

  The bobbin 41b has a main body portion formed in a substantially cylindrical shape, and flanges are formed on both sides in the axial direction of the main body portion. A coil wire 41c is wound around the body portion of the bobbin 41b between two flanges, and a control device (not shown) is connected to the coil wire 41c. A fixed magnetic pole 42 and a guide member 43 are fitted in the inner hole of the bobbin 41b so as to be separated from each other on one side and the other side in the axial direction.

  The fixed magnetic pole 42 is made of a magnetic material and has a substantially cylindrical shape. The fixed magnetic pole 42 is disposed on the other side in the axial direction of the inner hole of the bobbin 41b, and is in contact with the inner end face of the casing 41a. Further, the fixed magnetic pole 42 has an opening directed toward the housing 11, and a guide member 43 is disposed at the tip of the fixed magnetic pole 42. That is, the guide member 43 is disposed on one side in the axial direction of the inner hole of the bobbin 41 b and is in contact with the end surface of the convex portion 11 a of the housing 11. Thus, the fixed magnetic pole 42 and the guide member 43 are arranged apart from each other in the axial direction, and the interval is maintained by the cylindrical member 45 made of a nonmagnetic material. The guide member 43 arranged in this way is formed in a substantially cylindrical shape, and a biasing rod 44 is inserted into the inner hole thereof.

  The urging rod 44, which is a movable iron core, is a long member formed in a substantially columnar shape, and a portion on one end side in the axial direction, that is, a tip end portion protrudes from the guide member 43. Further, a through hole 11 b is formed at a position corresponding to the inner hole of the guide member 43 in the other end portion in the axial direction of the housing 11 (including the convex portion 11 a). The front end portion of the urging rod 44 is inserted into the through hole 11b, and the front end of the urging rod 44 faces the fixing member 13 in the axial direction. On the other hand, the other axial end of the urging rod 44, that is, the proximal end faces the fixed magnetic pole 42 in the axial direction. The fixed magnetic pole 42 and the urging rod 44 are formed with spring receiving recesses 42a and 44a on end surfaces facing each other, and the valve closing spring 5 is disposed between the spring receiving recesses 42a and 44a. ing.

  The valve closing spring 5, which is an example of a second urging spring, is a compression coil spring provided separately from the control spring 15 and is disposed between the spring receiving recesses 42 a and 44 a in a compressed state. Yes. Thereby, the urging rod 44 is urged to one side in the axial direction. The urging rod 44 is supported by the guide member 43 and the housing 11 so as to be relatively movable in the axial direction. As a result, the urging rod 44 is urged by the valve closing spring 5, whereby the tip of the urging rod 44 is pressed against the end surface on the other side in the axial direction of the fixing member 13.

  In this way, the valve closing spring 5 presses the urging rod 44 against the fixing member 13, whereby the urging force of the valve closing spring 5 acts on the valve body 12 via the urging rod 44 and the fixing member 13. That is, in addition to the urging force of the control spring 15, the urging force of the valve closing spring 5 acts on the valve body 12 toward the one side in the axial direction as the valve closing force. As a result, the valve body 12 can be seated on the valve seat 25 with a greater force than when the valve body 12 is seated on the valve seat 25 only by the control spring 15. That is, the airtightness of the primary space of the valve passage 24 can be improved.

  On the other hand, the auxiliary solenoid 4 can release the bias of the valve closing spring 5. That is, the auxiliary solenoid 4 magnetizes the fixed magnetic pole 42 and the urging rod 44 when a current flows through the coil wire 41 c of the solenoid coil 41. As a result, the urging rod 44 moves toward the fixed magnetic pole 42 against the urging force of the valve closing spring 5, and the urging rod 44 is eventually attracted to the fixed magnetic pole 42. Thereby, the urging rod 44 is separated from the fixing member 13, and the urging of the valve closing spring 5 acting on the valve body 12 can be released. That is, the valve closing force acting on the valve body 12 can be reduced. By doing so, the valve body 12 can be moved toward the open position with a smaller force than when the urging force of the valve closing spring 5 is constantly acting.

<Operation of solenoid valve device>
In the electromagnetic valve device 1, the urging force of the return spring 36 acts on the valve body 12 via the pressing rod 35 in a state where the current flowing through the two solenoids 3 and 4 is stopped, and accordingly the valve body. 12 is pushed towards the open position. Further, the urging force of the control spring 15 acts on the valve body 12 against the urging force of the return spring 36, and the valve body 12 is urged toward the closed position by the control spring 15. Has been. Further, the urging force of the valve closing spring 5 also acts on the valve body 12 via the urging rod 44, and accordingly, the valve body 12 is urged toward the closed position. In the solenoid valve device 1, the biasing force of the control spring 15 is set larger than the biasing force of the return spring 36 that resists the biasing force. Therefore, it is possible to close the valve passage 24 by seating the valve portion 12a of the valve body 12 on the valve seat 25 only by the urging force of the control spring 15, but the urging force of the valve closing spring 5 is used as the valve body. Further, the valve portion 12a is pressed against the valve seat 25 with a greater force. Thereby, compared with the case where there is no valve-closing spring 5, the valve channel | path 24 can be closed more firmly, and the airtightness of the primary side space of the valve channel | path 24 can be improved.

  When opening the valve passage 24, first, a current is supplied to the auxiliary solenoid 4 from a control device (not shown). Then, the fixed magnetic pole 42 and the urging rod 44 of the auxiliary solenoid 4 are excited, and the urging rod 44 is attracted to the fixed magnetic pole 42 against the urging force of the valve closing spring 5. Thereby, the urging rod 44 is separated from the valve body 12, and the urging to the valve body 12 by the valve closing spring 5 is released. When the urging of the valve body 12 by the valve closing spring 5 is released, the force for pressing the valve portion 12a against the valve seat 25 is reduced, and the valving body 12 is smaller than before the urging is released. Can be moved toward the open position. When the urging of the valve closing spring 5 is released in this way, a current flows from the control device (not shown) to the control solenoid 3.

  When a current flows through the control solenoid 3, an exciting force corresponding to the value of the flowing current acts on the pressing rod 35, and the control solenoid 3 adds a pressing force of the return spring 36 to this exciting force. Due to the pressure, the valve body 12 is pushed and moved toward the closed position against the biasing force of the control spring 15. Thereby, the valve body 12 moves toward the open position, and the valve passage 24 is opened. At this time, since the bias of the valve closing spring 5 is released in advance by the auxiliary solenoid 4, the valve body 12 is moved by a force that resists the biasing force of the control spring 15 to open the valve passage 24. be able to. Therefore, the pressing force (more specifically, the exciting force) required when opening the valve passage 24 can be reduced, and the increase in size of the control solenoid 3 can be suppressed.

  After the valve passage 24 is opened, the valve body 12 has a force acting on the valve body 12 such as the secondary pressure of the pressure feedback chamber 26b, the biasing force of the control spring 15, and the pressing force of the control solenoid 3. The valve passage 24 opens at an opening degree corresponding to the position of the valve body 12 by moving to a balanced position. As described above, the secondary pressure of the pressure feedback chamber 26b acts on the valve body 12, and the valve body 12 moves to a position where the force acting on the valve body 12 is balanced. Accordingly, the valve body 12 moves to adjust the opening degree of the valve passage 24. As a result, the secondary pressure can be maintained at a constant pressure corresponding to the pressing force of the control solenoid 3.

  In the solenoid valve device 1 configured as described above, the airtightness of the primary side space can be improved and the fluid can be prevented from leaking from the primary side space to the secondary side space. When the valve passage 24 is opened and fluid flows from the primary port 21 to the secondary port 22, the valve closing force acting on the valve body 12 can be reduced by the auxiliary solenoid 4, and the control solenoid 3 An increase in size can be suppressed.

  Further, in the electromagnetic valve device 1, the control solenoid 3 and the auxiliary solenoid 4 are respectively arranged on one side and the other side in the axial direction with respect to the valve body 12. Thereby, it can suppress that the solenoid valve apparatus 1 extends | stretches only to the axial direction one side or the other side with respect to the housing 11. FIG.

  Further, the solenoid valve device 1 employs an ON / OFF type solenoid as the auxiliary solenoid 4. That is, when a current flows through the solenoid coil 41, the fixed magnetic pole 42 and the urging rod 44 are excited, and the urging rod 44 is attracted to the fixed magnetic pole 42. Thereby, the urging | biasing of the valve closing spring 5 is cancelled | released because the urging | biasing rod 44 leaves | separates from the valve body 12, and leaves | separates. As described above, the electromagnetic valve device 1 is configured to release the bias of the valve closing spring 5 by exciting the fixed magnetic pole 42 and attracting the biasing rod 44. The power consumption of the solenoid 4 can be reduced compared to the case where an electromagnetic proportional solenoid is adopted as the auxiliary solenoid 4. Further, by releasing the bias of the valve closing spring 5 by the auxiliary solenoid 4, the valve body in a state in which the bias of the second biasing spring is reduced to the auxiliary solenoid 4 to the maximum (that is, zero). Can be moved toward the open position.

<Other embodiments>
In the electromagnetic valve device 1 of the present embodiment, an electromagnetic proportional solenoid is adopted as the control solenoid 3, but it is not always necessary to be an electromagnetic proportional solenoid. For example, an ON / OFF electromagnetic solenoid having the same function as that of the auxiliary solenoid 4 may be employed as the control solenoid 3. The auxiliary solenoid 4 is a pull-type solenoid, but the control solenoid 3 is a push-type solenoid. That is, as the control solenoid 3, an ON / OFF type push type solenoid may be employed. When an ON / OFF type solenoid is used as the control solenoid 3, the secondary pressure cannot be adjusted. An apparatus can be provided. The auxiliary solenoid 4 may be an electromagnetic proportional solenoid having the same function as the control solenoid 3. In this case, a pull-type electromagnetic proportional solenoid is used as the auxiliary solenoid 4.

  Further, the auxiliary solenoid 4 is not necessarily an ON / OFF type solenoid, and an electromagnetic proportional solenoid having the same function as the control solenoid 3 may be adopted. In this case, the biasing force of the valve closing spring 5 can be reduced (including zero) by the auxiliary solenoid 4. Also by this, the valve closing force acting on the valve body 12 can be reduced, and the control solenoid 3 can be prevented from increasing in size.

  In the solenoid valve device 1, the control solenoid 3 and the auxiliary solenoid 4 are arranged on one side and the other side in the axial direction of the housing 11, respectively. You may be biased and arranged in either one of the axial direction one side or the other side. In this case, the structure can be prevented from being stretched on the side where it is not arranged. As described above, the two solenoids 3 and 4 can be arranged in a biased manner, and can be configured by changing the shape of the electromagnetic valve device 1 in accordance with the layout of the region where the electromagnetic valve device 1 is arranged. . When the control solenoid 3 is arranged on the other side in the axial direction of the housing 11, a pull-type solenoid is used as the control solenoid 3. When the auxiliary solenoid 4 is disposed on one side in the axial direction of the housing 11, a push-type solenoid is employed as the auxiliary solenoid 4.

  Further, in the solenoid valve device 1, the auxiliary solenoid 4 is attached to the other end in the axial direction of the housing 11, but may be built in the housing 11. In this case, the auxiliary solenoid 4 is configured as an electromagnetic proportional solenoid, and an urging rod 44 made of a magnetic material is disposed so as to surround the valve body 12. For example, the auxiliary solenoid 4 is disposed so as to surround the intermediate portion of the valve body 12 and the biasing rod 44. The auxiliary solenoid 4 excites the urging rod 44 by flowing a current therethrough, and attracts the urging rod 44 in the other axial direction by an exciting force corresponding to the value of the flowing current. With this configuration, the auxiliary solenoid 4 can be built in the housing 11.

  Further, the urging force of the return spring 36 may be set to be larger than the urging force of the control spring 15. In this case, the bias of the valve closing spring 5 is released and the valve passage 24 is opened. Further, the control spring 15 is not necessarily arranged in the space 26, and may be arranged on the valve portion 12 a side from the space 26.

  Furthermore, in the solenoid valve device 1, when the valve is opened, the auxiliary solenoid 4 is operated and then the control solenoid 3 is operated. For example, the auxiliary solenoid 4 and the control solenoid 3 are simultaneously operated. The control solenoid 3 may be operated before the auxiliary solenoid 4 is operated. In addition, by operating the auxiliary solenoid 4 before the control solenoid 3 is operated, the timing for supplying the starting current to the control solenoid 3 and the auxiliary solenoid 4 can be shifted, and the electromagnetic valve device 1 is operated. It is possible to suppress the peak of the current necessary for the generation.

1 solenoid valve device 3 control solenoid 4 auxiliary solenoid 5 valve closing spring (second biasing spring)
11 Housing 12 Valve body 15 Control spring (first biasing spring)
21 Primary port 22 Secondary port 24 Valve passage 41 Solenoid coil 42 Fixed magnetic pole 44 Energizing rod (movable iron core)

Claims (6)

A housing having a valve passage connecting the primary port and the secondary port;
A valve body that is provided in the housing and moves between a closed position for closing the valve passage and an open position for opening the valve passage to open and close the valve passage;
A first biasing spring that biases the valve body toward the closed position;
A solenoid for control that moves the valve body toward the open position against a biasing force of the first biasing spring when a current is passed;
A second biasing spring provided separately from the first biasing spring and biasing the valve body toward the closed position;
An electromagnetic valve device, comprising: an auxiliary solenoid that reduces an urging force of the second urging spring with respect to the valve body when an electric current flows.   2. The electromagnetic valve device according to claim 1, wherein the auxiliary solenoid releases the bias of the second bias spring with respect to the valve body. 3. The valve body extends in a predetermined direction,
The control solenoid is located on one side of the valve body in the predetermined direction, and pushes the valve body toward the other side of the predetermined direction to move toward the open position.
The second urging spring urges the valve body to one side in the predetermined direction and moves it toward the closed position,
The electromagnetic valve device according to claim 2, wherein the auxiliary solenoid is located on the other side of the valve body in the predetermined direction and is separated from the valve body to release the bias of the second biasing spring. The auxiliary solenoid has a fixed magnetic pole, a biasing rod that is a movable iron core, and a solenoid coil,
The biasing rod is disposed away from the fixed magnetic pole toward the closed position and is biased by the second biasing spring to push the valve body toward the closed position. ,
The solenoid coil according to claim 2 or 3, wherein when a current is passed, the energizing rod is excited to attract the energizing rod to the fixed magnetic pole to release the energizing force. Solenoid valve device.   5. The electromagnetic control device according to claim 4, wherein the control solenoid is an electromagnetic proportional solenoid that presses the valve body with an excitation force corresponding to a value of a current passed through the control solenoid.   The electromagnetic valve device according to claim 4 or 5, wherein the second biasing spring is disposed between the biasing rod and the fixed magnetic pole.