JP6022329B2 - solenoid valve - Google Patents

Description

  The present invention relates to a solenoid valve for controlling the supply of high-pressure gas.

  Conventionally, as a solenoid valve for controlling the supply of high-pressure gas, for example, when high-pressure hydrogen gas is taken out from a hydrogen tank mounted on a fuel cell vehicle, for example, what is described in Patent Document 1 is known. . This solenoid valve includes a cylinder having a valve chamber formed therein, a gas passage communicating between the inside and the outside of the cylinder, a plunger that is displaced in the gas passage, and a valve body that is displaced in accordance with the displacement of the plunger. The gas passage includes an introduction path for introducing high-pressure gas (hydrogen gas) into the valve chamber and a lead-out path for deriving the introduced high-pressure gas from the valve chamber. Then, by energizing a coil that is wound around the outer periphery of the cylinder, the plunger moves in the valve chamber, whereby the valve element opens and closes the gas passage.

JP 2011-226537 A

  In the electromagnetic valve of Patent Document 1, the valve element is accommodated in a sliding hole provided in the plunger. That is, the valve body can be displaced relative to the plunger. The relative displacement amount of the valve body with respect to the plunger is regulated by the plunger main body and a locking member press-fitted into the end of the sliding hole. The plunger is provided with an inflow hole through which the high-pressure gas introduced into the valve chamber flows into the sliding hole. As a result, the pressure of the high pressure gas introduced into the valve chamber is prevented from acting in only one direction on the plunger, and the plunger is prevented from being displaced only by the pressure of the high pressure gas.

  By the way, the valve body is constantly biased toward the locking member by a biasing member interposed between the main body of the plunger. For this reason, while using the electromagnetic valve, the collision between the valve body and the locking member is repeated, and the locking member that is press-fit may be loosened.

  The present invention has been made in view of such circumstances, and an object thereof is to provide an electromagnetic valve with high operational reliability.

An electromagnetic valve that solves the above problems includes a cylinder in which a valve chamber is formed, an introduction path that communicates the inside and outside of the cylinder and introduces high-pressure gas into the valve chamber, and introduces the introduced high-pressure gas from the valve chamber. a gas flow path including a lead-out path to a coil disposed in the wound state on the outer periphery of the cylinder, a plunger for moving the valve chamber by energization of the coil provided inside the valve chamber, the A biasing member that biases the plunger, and a valve body that opens and closes the gas flow path in conjunction with the plunger, and when the coil is not energized, the plunger biased by the biasing member A valve body that closes the gas flow path in conjunction with the coil and opens the gas flow path in conjunction with the plunger that moves against the biasing force of the biasing member when the coil is energized. Equipped with solenoid valve Oite, the plunger, the valve body is accommodated, together with displaceable abutment portion which abuts against the valve opening direction opposite portions of said valve body when opening the gas flow path formed of a magnetic material Fixed to the first divided body in a state in which the valve body is accommodated between the first divided body on which a force based on a magnetic circuit formed by energizing the coil acts and the displacement contact portion And a second divided body.

  Conventionally, the valve body has been displaced in the direction of opening the gas flow path by abutting with a locking member that is press-fitted and fixed to the plunger. For this reason, every time the gas flow path is opened, the contact between the valve body and the locking member is repeated, and as a result, the locking member may be loosened. Thereby, even if the plunger moves, the valve body may not open and close the gas flow path. In this respect, according to this configuration, the valve body contacts the displacement contact portion and moves together with the first divided body, that is, the plunger, thereby opening the gas flow path. Since the displacement contact portion is a part of the first divided body, it is displaced integrally with the first divided body. Thereby, compared with the conventional solenoid valve, the solenoid valve which employ | adopts this structure has high operation | movement reliability.

The said structure WHEREIN: It is preferable that a said 2nd division body is attached with a screw pair even with respect to a said 1st division body.
According to this configuration, by adjusting the region in which the first divided body and the second divided body are screwed together, the valve body accommodated between the first divided body and the second divided body is adjusted. The relative displacement amount with respect to the first and second divided bodies can be adjusted. That is, the amount of displacement of the valve body relative to the amount of displacement of the plunger and the opening of the gas flow path can be adjusted as appropriate.

  The solenoid valve of the present invention has high operational reliability.

Sectional drawing which shows schematic structure of a solenoid valve. The expanded sectional view which shows schematic structure of a solenoid valve. The expanded sectional view which shows the solenoid valve of the state which the pilot flow path opened. The expanded sectional view which shows the solenoid valve in the state where the derivation way opened.

Hereinafter, an embodiment of the electromagnetic valve will be described.
As shown in FIG. 1, the electromagnetic valve 1 includes a valve body 11 formed in a substantially cylindrical shape. The valve body 11 is formed with an inflow port 12 that opens to the outer peripheral surface and an outflow port 13 that opens to the first end surface (left end surface in FIG. 1). A hydrogen tank (not shown) filled with high-pressure hydrogen gas is connected to the inflow port 12.

  Further, the valve body 11 is formed with a fitting hole 14 continuous with the outflow port 13 coaxially with the outflow port 13. The fitting hole 14 has a larger diameter than the outflow port 13. The fitting hole 14 is also continuous with the inflow port 12. Furthermore, the valve body 11 is formed with an accommodation hole 15 that is continuous with the fitting hole 14 and opens to the second end surface (the right end surface in FIG. 1) of the valve body 11. The accommodation hole 15 has a larger diameter than the fitting hole 14. A fuel cell (not shown) is connected to the outflow port 13. Hydrogen gas that has flowed into the inflow port 12 from the hydrogen tank flows out from the outflow port 13 to the fuel cell.

  The electromagnetic valve 1 also includes a substantially bottomed cylindrical cylinder 21 that is fixed inside the valve body 11. A valve chamber 23 communicating with the inflow port 12 and the outflow port 13 is formed in the cylinder portion 22 of the cylinder 21. Further, a lead-out path 24 that communicates the outflow port 13 and the valve chamber 23 is formed in the cylinder 21. Further, the electromagnetic valve 1 includes a valve portion 25 that opens and closes the outlet passage 24 and a solenoid portion 26 that is provided on the outer peripheral surface of the valve body 11 and drives the valve portion 25. The solenoid valve 1 drives the valve unit 25 through the solenoid unit 26 to control the opening / closing of the lead-out path 24, that is, whether hydrogen gas is supplied.

Next, the structure of the cylinder 21 and its periphery will be described.
A cylindrical protrusion 32 is formed on the bottom 31 of the cylinder 21 coaxially with the cylinder 22. The outer diameters of the bottom portion 31 and the cylindrical portion 22 are formed to be substantially equal to the inner diameter of the fitting hole 14 of the valve body 11. The outer diameter of the protruding portion 32 is formed substantially equal to the inner diameter of the outflow port 13. Then, the cylinder 21 is fixed to the valve body 11 by fitting the protrusion 32 to the outflow port 13 and fitting the bottom 31 to the fitting hole 14. A disc-shaped lid member 33 is fixed to the second end surface (the right end surface in FIG. 1) of the valve body 11. The opening end of the accommodation hole 15 is closed by the lid member 33. The cylinder 21 is fixed to the valve body 11 in a state where the outer bottom surface 31a and the step surface 34 between the outflow port 13 and the fitting hole 14 are separated from each other. Thereby, an action space 35 communicating with the inflow port 12 is formed between the fitting hole 14 and the protruding portion 32.

  A lead-out path 24 that communicates the outflow port 13 and the valve chamber 23 is formed coaxially with the axis of the cylinder 21 and opens to the inner bottom surface 31 b of the cylinder 21 and the distal end surface 32 a of the protruding portion 32. In addition, the cylinder 21 is formed with an introduction path 36 that connects the valve chamber 23 and the working space 35, that is, the valve chamber 23 and the inflow port 12. The introduction path 36 opens to the inner bottom surface 31 b and the outer bottom surface 31 a of the cylindrical portion 22, and is formed at a position eccentric with respect to the axis of the cylinder 21. The lead-out path 24 and the introduction path 36 constitute a gas flow path that communicates the inside and outside of the cylinder 21. The cylinder 21 is resistant to hydrogen embrittlement and is made of an aluminum alloy (for example, A6061-T6 (JIS standard)) or a stainless steel (for example, SUS316L (JIS standard)) that is relatively easy to process. Is formed.

  An O-ring 41 is provided between the outer peripheral surface of the bottom portion 31 and the inner peripheral surface of the fitting hole 14. A backup ring 42 for preventing the O-ring 41 from protruding is provided on the accommodation hole 15 side. The O-ring 41 hermetically seals between the outer peripheral surface of the bottom 31 and the inner peripheral surface of the fitting hole 14. An O-ring 43 is provided between the protrusion 32 and the outflow port 13. A backup ring 44 is provided on the outflow port 13 side of the O-ring 43 to prevent the O-ring 43 from protruding. An O-ring 43 hermetically seals between the protrusion 32 and the outflow port 13.

Next, the configuration of the valve unit 25 will be described.
As shown in FIG. 1, the valve portion 25 contacts and separates from the valve seat 51 provided on the valve chamber 23 side (right side in FIG. 1) of the lead-out path 24 inside the valve body 11 and the valve seat 51. A valve body 52 that is movable in the direction (the axial direction of the cylinder 21) is provided.

  As shown in FIG. 2, the annular valve seat 51 is arranged coaxially with the outlet path 24 and is fixed to the cylinder 21. Specifically, an accommodating recess 53 having a diameter larger than that of the outlet path 24 is formed on the inner bottom surface 31 b of the cylinder 21 coaxially with the outlet path 24, and the valve seat 51 is accommodated in the accommodating recess 53. In this state, it is fixed to the cylinder 21. The valve seat 51 is made of a material such as polyimide resin or polyether ether ketone resin, and can be elastically deformed.

  The valve body 52 includes a substantially cylindrical main body portion 54 and a columnar contact portion 55 that protrudes from the first end surface (left side in FIG. 2) of the valve body 11 and contacts the valve seat 51. ing. The contact portion 55 has a smaller diameter than the main body portion 54 and a larger diameter than the inner diameter of the valve seat 51. When the valve body 52 is seated on the valve seat 51, that is, when the contact portion 55 of the valve body 52 is in contact with the valve seat 51, the lead-out path 24 is closed, and hydrogen gas from the inflow port 12 to the outflow port 13 is closed. Supply is regulated. On the other hand, when the valve body 52 is separated from the valve seat 51, that is, when the contact portion 55 of the valve body 52 is separated from the valve seat 51, the lead-out path 24 is opened, and the inflow port 12 to the outflow port 13 are opened. Hydrogen gas is supplied. As described above, in the electromagnetic valve 1, the outlet passage 24 (gas passage) is opened and closed by the valve body 52.

  The valve body 52 is formed with a pilot flow path 61 that opens to the lead-out path 24 while being seated on the valve seat 51. The valve chamber 23 is provided with a pilot valve portion 62 for opening and closing the pilot flow path 61.

  Specifically, the pilot channel 61 is formed coaxially with the axis of the valve body 52. The pilot flow path 61 opens to the distal end side of the contact portion 55 in the valve body 52 and opens to the opposite side of the main body portion 54 from the contact portion 55. Further, the cross-sectional area of the pilot flow path 61 is smaller than the cross-sectional area of the lead-out path 24.

  The pilot valve section 62 opens and closes the pilot flow path 61 by contacting and separating from the annular pilot valve seat 63 provided on the opposite side of the abutment section 55 of the main body section 54 with respect to the pilot valve seat 63. The pilot valve body 64 is provided. The pilot valve seat 63 is arranged coaxially with the pilot flow path 61 and is fixed to the valve body 52. Specifically, an accommodation recess 65 having a diameter larger than that of the pilot channel 61 is formed coaxially with the pilot channel 61 on the side opposite to the contact portion 55 of the main body 54, and the pilot valve seat 63. Is fixed to the valve body 52 while being accommodated in the accommodating recess 65. The pilot valve seat 63 is made of a material such as polyimide resin or polyether ether ketone resin and can be elastically deformed. The pilot valve body 64 has a spherical shape having a diameter smaller than the inner diameter of the housing recess 65. For this reason, the pilot valve body 64 creates a gap between the main body portion 54 of the valve body 52 (the inner peripheral surface of the housing recess 65) in a state where the pilot valve body 64 is seated on the pilot valve seat 63. When the pilot valve body 64 is seated on the pilot valve seat 63, the pilot flow path 61 is closed. On the other hand, when the pilot valve body 64 is separated from the pilot valve seat 63, the pilot flow path 61 is opened. That is, hydrogen gas is supplied to the outlet passage 24 through the pilot passage 61.

Next, the configuration of the solenoid unit 26 will be described.
As shown in FIG. 1, the solenoid portion 26 includes a coil 71 that is wound around the outer periphery of the cylindrical portion 22 in the cylinder 21, and a plunger 72 that is movably provided in the cylinder 21 (valve chamber 23). And a stator 73 facing the plunger 72 in the axial direction of the cylinder 21. By energizing the coil 71, the plunger 72 is attracted to the stator 73, so that the valve body 52 is separated from the valve seat 51. More specifically, after the pilot valve body 64 is separated from the pilot valve seat 63 and the pilot flow path 61 is opened, the valve body 52 is separated from the valve seat 51 and the lead-out path 24 is opened. As described above, the valve body 52 opens and closes the outlet passage 24 (gas passage) by the movement of the plunger 72.

  As shown in FIG. 2, the plunger 72 includes a cylindrical second divided body 120 as well as a cylindrical first divided body 110. The first and second divided bodies 110 and 120 are both magnetic bodies such as iron.

  The first divided body 110 is provided with first to third cylindrical portions 111 to 113 in order from the bottom 31 side (the left side in FIG. 2) of the cylinder 21. The first cylindrical portion 111 has an inner diameter that is larger than the outer shape of the contact portion 55 of the valve body 52 and smaller than the outer diameter of the main body portion 54. The second cylindrical portion 112 has an inner diameter that is larger than the first cylindrical portion and larger than the outer diameter of the main body portion 54. The third cylindrical portion 113 has a larger inner diameter than the second cylindrical portion 112. These first to third cylindrical portions 111 to 113 are formed coaxially with the cylinder 21. The outer diameters of the first to third cylindrical portions 111 to 113 are set equal. A thread groove 113 a is cut in the inner surface of the third cylindrical portion 113.

  Inside the second cylindrical portion 112, the valve body 52 is accommodated so as to be relatively movable along the axial direction with respect to the first divided body 110. The displacement of the valve body 52 toward the valve seat 51 (the left side in FIG. 2) is caused by the contact between the boundary portion 114 between the first cylindrical portion 111 and the second cylindrical portion 112 and the main body portion 54 of the valve body 52. Be regulated. The boundary portion 114 corresponds to a displacement contact portion. Note that the contact portion 55 of the valve body 52 accommodated in the second cylindrical portion 112 penetrates the first cylindrical portion 111 and protrudes into the accommodating recess 53.

  The second divided body 120 is provided with fourth to sixth cylindrical portions 121 to 123 in order from the bottom 31 side (the left side in FIG. 2) of the cylinder 21. The fourth cylindrical portion 121 has an outer diameter that is smaller than the inner diameter of the second cylindrical portion 112 and equal to the outer diameter of the main body portion 54 of the valve body 52. The fifth cylindrical portion 122 has an outer diameter that is larger than the outer diameter of the fourth cylindrical portion 121 and substantially equal to the inner diameter of the third cylindrical portion 113. The sixth cylindrical portion 123 has an outer diameter that is larger than the outer diameter of the fifth cylindrical portion 122 and equal to the outer diameter of the first to third cylindrical portions 111 to 113. These fourth to sixth cylindrical portions 121 to 123 are formed coaxially with the cylinder 21. A thread 122 a is cut on the outer surface of the fifth cylindrical portion 122.

  The second divided body 120 is formed by screwing the fifth cylindrical portion 122 into the third cylindrical portion 113 with the fourth cylindrical portion 121 inserted into the second cylindrical portion 112. Screwed onto one divided body 110. Accordingly, the plunger 72 composed of the first and second divided bodies 110 and 120 moves integrally with the valve body 52.

  A pilot valve body 64 is press-fitted and fixed inside the fourth cylindrical portion 121. Thereby, the pilot valve body 64 and the plunger 72 move integrally. When the valve body 52 is seated on the valve seat 51 and the pilot valve body 64 is seated on the pilot valve seat 63, the valve body 52 is separated from the boundary portion 114 by a predetermined distance. The predetermined distance is a distance at which the pilot valve body 64 can be separated from the pilot valve seat 63. As a result, the pilot valve body 64 is integrated with the plunger 72 and moves by a predetermined distance in a direction away from the pilot valve seat 63 (second end surface of the valve body 11, right side in FIG. 2), and the boundary to the valve body 52. The plunger 72 and the valve body 52 are allowed to move relative to each other until the portion 114 abuts. In a state where the valve body 52 is in contact with the boundary portion 114, the plunger 72, the valve body 52, and the pilot valve body 64 are integrally movable to the stator 73 side (right side in FIG. 2).

  Further, a communication groove 78 along the axial direction is formed on the outer peripheral surface of the plunger 72, more specifically, the outer peripheral surfaces of the first and second divided bodies 110 and 120. The communication groove 78 is connected to the valve chamber 23. The second cylindrical portion 112 of the first divided body 110 is formed with a first side hole 79 that connects the inside of the second cylindrical portion 112 and the communication groove 78. The hydrogen gas supplied into the second cylindrical portion 112 through the first side hole 79 is supplied to the pilot flow path 61. Further, the hydrogen gas flowing into the valve chamber 23 through the communication groove 78 is supplied to the space between the plunger 72 and the stator 73. This prevents the pressure of hydrogen gas from acting only on one side of the plunger 72 in the axial direction. That is, the movement of the plunger 72 due to the pressure of hydrogen gas is restricted.

  On the other hand, the stator 73 is formed in a substantially cylindrical shape and is press-fitted and fixed to the cylindrical portion 22 of the cylinder 21. The stator 73 and the plunger 72 are separated by a distance necessary for the valve body 52 to move away from the valve seat 51 by the movement of the plunger 72. In addition, the stator 73 is formed with an accommodation hole 81 in the plunger 72, precisely at a position facing the through hole 77 of the second divided body 120. A biasing member 82 such as a coil spring is accommodated in the accommodation hole 81 and the through hole 77. The urging member 82 moves the plunger 72 to the valve seat 51 side (in FIG. 2) via a fixing plate 83 fixed inside the second divided body 120, more specifically, inside the fourth cylindrical portion 121. (Left side). The second divided body 120, more specifically, the sixth cylindrical portion 123 is formed with a second side hole 84 that connects the inside of the sixth cylindrical portion 123 and the communication groove 78. Due to the second side hole 84, the accommodation hole 81 and the through hole 77 are in communication with the valve chamber 23 even when the plunger 72 is in contact with the stator 73.

  An O-ring 86 is interposed between the outer peripheral surface of the stator 73 and the inner peripheral surface of the cylindrical portion 22. An O-ring 86 hermetically seals between the stator 73 and the cylindrical portion 22. The O-ring 86, the O-ring 41 between the bottom 31 and the fitting hole 14, and the O-ring 43 (see FIG. 1) between the protruding portion 32 and the outflow port 13 (see FIG. 1) Airtightness of the valve chamber 23) is ensured.

  As shown in FIG. 1, the coil 71 is provided between a pair of yokes 91 a and 91 b provided on the outer peripheral surface of the cylinder 21 via an insulating member 92 such as insulating paper having insulation properties. The yoke 91 a is disposed in the vicinity of the bottom 31 of the cylinder 21, and the yoke 91 b is disposed at the opening end of the cylindrical portion 22. In addition, the circumference | surroundings of the coil 71 are coat | covered with the resin mold part 93 formed by injection molding etc. The coil 71 is electrically connected to a pair of terminals 94 (only one is shown in FIG. 1) as terminals connected to the outside. A drive current is supplied to the coil 71 via each terminal 94. The terminal 94 is made of a conductor material, and is supported by a terminal block 96 made of a resin material fixed to the yoke 91b with a screw (not shown). A part of the terminal 94 is formed on the valve body 11. The opening 98 is exposed to the outside. When a drive current is supplied to the coil 71, a magnetic circuit is formed and the stator 73 attracts the plunger 72.

Next, the operation of the electromagnetic valve 1 will be described.
As shown in FIGS. 1 and 2, when the solenoid valve 1 is not supplied with a driving current to the coil 71, the plunger 72 is moved by the biasing member 82 to the first end face side of the valve body 11 (FIGS. 1 and 2). The pilot valve body 64 is seated on the pilot valve seat 63 and the valve body 52 is seated on the valve seat 51. That is, the outlet path 24 is closed. In this state, the hydrogen gas flowing in from the inflow port 12 is supplied to the valve chamber 23 via the working space 35 and the introduction path 36, but not supplied to the outflow port 13.

  When drive current is supplied to the coil 71, the plunger 72 is attracted to the stator 73. As a result, the plunger 72 moves to the second end face side (the right side in FIGS. 1 and 2) of the valve body 11 against the urging force of the urging member 82. At this time, until the boundary portion 114 comes into contact with the valve body 52, the valve body 52 is moved to the first end face side of the valve body 11 by the back pressure of the hydrogen gas introduced into the sliding hole 75 (FIGS. 1 and 2). Therefore, only the pilot valve body 64 moves integrally with the plunger 72. Thereby, as shown in FIG. 3, the pilot valve body 64 is separated from the pilot valve seat 63, and the pilot flow path 61 is opened. For this reason, hydrogen gas is supplied to the lead-out path 24 via the pilot flow path 61, and the differential pressure between the lead-out path 24 and the valve chamber 23 is reduced.

  Then, as shown in FIG. 4, the boundary portion 114 comes into contact with the valve body 52, so that the valve body 52 and the plunger 72 are integrally moved to the second end face side (the right side in FIG. 4) of the valve body 11, When the valve body 52 is separated from the valve seat 51, the lead-out path 24 is opened. Thereby, the hydrogen gas flowing in from the inflow port 12 is supplied to the outflow port 13 through the working space 35, the introduction path 36, the valve chamber 23, and the outlet path 24.

  On the other hand, when the supply of drive current to the coil 71 is stopped, the urging force of the urging member 82 causes the plunger 72 to move to the first end face side (left side in FIG. 4) of the valve body 11, and the pilot valve The body 64 is seated on the pilot valve seat 63 and the valve body 52 is seated on the valve seat 51, and the supply of hydrogen gas from the inflow port 12 to the outflow port 13 is stopped.

As described above, the supply of hydrogen gas from the hydrogen tank to the fuel cell is controlled by the electromagnetic valve 1.
Each time the solenoid valve 1 repeats supply and stop of supply of hydrogen gas, the valve body 52 and the boundary portion 114, more precisely, the first divided body 110 abuts. Since the first divided body 110 is attached to the second divided body 120 with a screw pair, the first divided body 110 is caused to come into contact with the valve body 52 by the impact of contact with the second divided body 120. It is hard to come off from. For this reason, the operation reliability of the solenoid valve 1 is high.

  Further, the first divided body 110 and the second divided body 120 are attached by screw pairs. That is, by adjusting the screwing amounts of the first and second divided bodies 110 and 120, the relative displacement amount that is the moving distance of the valve body 52 with respect to the plunger 72 can be appropriately adjusted. That is, the opening degree of the pilot flow path 61 can be adjusted as appropriate. Thereby, the supply amount of the hydrogen gas supplied to the lead-out path 24 via the pilot flow path 61 can be adjusted. As a result, the magnitude of the differential pressure between the outlet passage 24 and the valve chamber 23 can be adjusted as appropriate. In this case, the second divided body 120 can be firmly fixed to the first divided body 110 by a fixing member (not shown).

As described above in detail, according to the present embodiment, the following effects can be obtained.
(1) Second division in which the plunger 72 is attached to the first divided body 110 with a screw pair while the valve body 52 is accommodated between the first divided body 110 and the first divided body 110. The body 120 is constituted. The first divided body 110 includes a boundary portion 114 that comes into contact with the valve body 52 when displaced in a direction away from the lead-out path 24 (right side in FIGS. 1 and 2). As a result, the valve body 52 comes into contact with the boundary portion 114 and moves together with the first divided body 110, that is, the plunger 72, thereby separating the valve body 52 and the outlet path 24. Since it is a part of the boundary part 114 and the first divided body 110, it does not fall off from the first divided body 110. Thereby, compared with the conventional solenoid valve, the solenoid valve 1 has high operation reliability.

  (2) The second divided body 120 is attached to the first divided body 110 with a screw pair. That is, by adjusting the screwing amounts of the first and second divided bodies 110 and 120, the relative displacement amount that is the moving distance of the valve body 52 with respect to the plunger 72 can be appropriately adjusted. That is, the opening degree of the pilot flow path 61 can be adjusted as appropriate. Thereby, the supply amount of the hydrogen gas supplied to the lead-out path 24 via the pilot flow path 61 can be adjusted. As a result, the magnitude of the differential pressure between the outlet passage 24 and the valve chamber 23 can be adjusted as appropriate.

  (3) A pilot flow path 61 having an opening in the outlet path 24 and a smaller cross-sectional area than the outlet path 24 is formed in the valve body 52. Further, a pilot valve body 64 that opens and closes the pilot flow path 61 by being brought into contact with and separated from the pilot valve seat 63 provided in the pilot flow path 61 is provided. Then, the pilot valve body 64 is fixed to the plunger 72, and the pilot flow path 61 is formed by providing the valve body 52 so that the pilot valve body 64 can be moved relative to the pilot valve seat 63 by a predetermined distance or more. After the opening, the outlet path 24 is opened. According to the above configuration, since the cross-sectional area of the pilot flow path 61 is smaller than the cross-sectional area of the lead-out path 24, the plunger 72 (pilot valve body 64) can be used even with a small suction force compared to the case where the valve body 52 is moved directly. Can be moved to open the pilot flow path 61. In addition, after the pilot flow path 61 is opened, high pressure gas is supplied to the lead-out path 24 through the pilot flow path 61, so that the differential pressure between the lead-out path 24 and the valve chamber 23 becomes small. Even if the cross-sectional area of the passage 24 is large, the lead-out passage 24 can be opened by moving the valve body 52 with a small force. As described above, since the valve body 52 can be moved and the lead-out path 24 can be opened without supplying a large drive current to the coil 71, the cross-sectional area of the lead-out path 24 is increased while suppressing an increase in power consumption. Thus, the flow rate of the hydrogen gas supplied from the inflow port 12 to the outflow port 13 can be secured.

In addition, you may change the said embodiment as follows.
In the above embodiment, the first and second divided bodies 110 and 120 may be fixed other than the screw pair. For example, the second divided body 120 may be press-fitted and fixed to the first divided body 110. Since both the first and second divided bodies 110 and 120 are magnetic bodies, when a drive current is supplied to the coil 71, the first and second divided bodies 110 and 120 are displaced to the second end face (the right side in FIGS. 1 and 2) of the valve body 11. To do. That is, no force is exerted on the press-fitted portions of the first and second divided bodies 110 and 120 in the direction in which they are separated from each other. Therefore, even if this configuration is adopted, the same effect as the effect (1) of the above embodiment is achieved. An effect can be obtained.

  In the above embodiment, the insulating member 92 is interposed between the coil 71 and the cylindrical portion 22 of the cylinder 21. However, the invention is not limited thereto, and if insulation between the coil 71 and the cylinder 21 can be secured, The insulating member 92 may not be interposed.

  In the above embodiment, the pilot valve portion 62 is provided in the electromagnetic valve 1, but the pilot valve portion 62 may not be provided, and the lead-out path 24 may be directly opened and closed by energizing the coil 71.

In the above embodiment, the outlet path 24 is opened and closed by the valve body 52, but the present invention is not limited to this, and the introduction path 36 may be opened and closed by the valve body 52.
In the above embodiment, a predetermined tension is applied to the coil 71 by forming a coil 71 by winding a conducting wire on the outer peripheral surface 22a of the cylinder 21 while applying tension. However, the present invention is not limited to this, and for example, a coil in a wound state may be arranged in the cooled cylinder 21 and the cylinder 71 may be thermally expanded to generate a predetermined tension in the coil 71. Alternatively, the wound coil 71 may be placed in the cylinder 21 in a heated state, and the coil 71 may be thermally contracted to generate a predetermined tension in the coil 71. In addition, the coil 71 in a wound state may be arranged on the outer periphery of the cylinder 21 by any method as long as a predetermined tension can be generated (acted) on the coil 71.

  In the above embodiment, the present invention is applied to the electromagnetic valve 1 for controlling the supply of hydrogen gas. However, the present invention is not limited to this, and for example, an electromagnetic valve for supplying a high-pressure gas other than hydrogen such as oxygen or nitrogen. You may apply. Moreover, the element which comprises high pressure gas is not restricted to single gas. That is, the high-pressure gas to be decompressed may be composed of a plurality of elements.

Next, the technical idea conceived from the embodiment and the other examples will be described.
(A) In the above configuration, the first divided body is continuous with the introduction path, and has a side hole on the second divided body side that is continuous with the accommodating portion of the valve body. A pilot flow path having a smaller cross-sectional area than the lead-out path that is continuous with the housing portion and the lead-out path, and interlocked with the plunger between the first split body and the second split body. An electromagnetic valve comprising a pilot valve body that opens and closes the pilot flow path.

  According to this configuration, since the cross-sectional area of the pilot flow path is smaller than the cross-sectional area of the lead-out path, the plunger can be moved even with a small suction force to open the pilot flow path compared to when the valve body is moved directly. Can do. In addition, after the pilot flow path is opened, high pressure gas is supplied to the lead-out path through the pilot flow path, so that the differential pressure between the lead-out path and the valve chamber is reduced. Even if it is formed large, the lead-out path can be opened by moving the valve body with a small force. That is, since the valve body can be moved with a small driving current to open the lead-out path, hydrogen gas supplied from the lead-in path to the lead-out path by increasing the cross-sectional area of the lead-out path while suppressing an increase in power consumption Can be secured. In addition, the reliability of the operation of the electromagnetic valve when the displacement contact portion and the valve body abut is improved.

DESCRIPTION OF SYMBOLS 1 ... Solenoid valve, 11 ... Valve body, 21 ... Cylinder, 23 ... Valve chamber, 24 ... Derivation path, 36 ... Introduction path, 51 ... Valve seat, 52 ... Valve body, 71 ... Coil, 72 ... Plunger, 73 ... Stator 110 ... 1st division body, 113a ... Thread groove, 114 ... Boundary part, 120 ... 2nd division body, 122a ... Thread.

Claims (2)

A cylinder having a valve chamber formed therein;
A gas flow path including an introduction path that communicates the inside and outside of the cylinder and introduces high-pressure gas into the valve chamber, and a lead-out path that leads out the introduced high-pressure gas from the valve chamber;
A coil arranged in a wound state on the outer periphery of the cylinder;
A plunger that is provided inside the valve chamber and moves in the valve chamber by energizing the coil;
A biasing member that biases the plunger;
When the coil is not energized, the gas flow path is closed in conjunction with the plunger energized by the energizing member, and when the coil is energized, it resists the energizing force of the energizing member. In a solenoid valve comprising: a valve body that opens the gas flow path in conjunction with the plunger that moves as a
The plunger is
The valve body is accommodated, together with displaceable abutment portion which abuts against the valve opening direction opposite portions of said valve body when opening the gas passage, the energization of the coil is made of magnetic material A first divided body on which a force based on the magnetic circuit to be formed acts ;
An electromagnetic valve, comprising: a second divided body fixed to the first divided body in a state where the valve body is accommodated between the displacement contact portion. The solenoid valve according to claim 1,
The electromagnetic valve, wherein the second divided body is attached to the first divided body with a screw pair.