CN110617346A - Electromagnetic valve - Google Patents
Electromagnetic valve Download PDFInfo
- Publication number
- CN110617346A CN110617346A CN201910445853.9A CN201910445853A CN110617346A CN 110617346 A CN110617346 A CN 110617346A CN 201910445853 A CN201910445853 A CN 201910445853A CN 110617346 A CN110617346 A CN 110617346A
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- China
- Prior art keywords
- valve
- hole
- passage
- valve hole
- valve body
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
- F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
- F16K11/04—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only lift valves
- F16K11/044—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only lift valves with movable valve members positioned between valve seats
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/02—Construction of housing; Use of materials therefor of lift valves
- F16K27/0254—Construction of housing; Use of materials therefor of lift valves with conical shaped valve members
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/02—Construction of housing; Use of materials therefor of lift valves
- F16K27/0263—Construction of housing; Use of materials therefor of lift valves multiple way valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
- F16K31/0603—Multiple-way valves
- F16K31/0624—Lift valves
- F16K31/0627—Lift valves with movable valve member positioned between seats
Abstract
The invention provides a solenoid valve in which a movable core operates at high speed, and which is simple to manufacture, consumes less power, and can obtain high output. The coil bobbin (43) is provided with a cylindrical portion (43a), a coil (44), a fixed core (45), and a movable core (46). The fixed core (45) has a valve body (48) and is fixed to the cylindrical section (43 a). The movable core (46) is movably fitted to the cylindrical portion (43 a). The valve device is provided with a push rod (50) moving relative to a fixed core (45), a valve core (24) moving in a 1 st valve hole (52), and a spring member (58) for pushing the valve core (24). The valve body (48) has an air passage including the 1 st valve hole (52) and a valve seat (54) that is in contact with and separated from the valve element (24) and opens and closes the air passage. The air valve is provided with a 2 nd sealing member (82) (sealing member) which seals between the 1 st valve hole (52) and the valve core (24) and divides the inside of the 1 st valve hole (52) into an air passage side and a push rod (50) side.
Description
Technical Field
The present invention relates to an electromagnetic valve that can be used as a pilot valve of an air pressure device that requires high-speed operation.
Background
Conventionally, a pilot valve for controlling the operation of an air pressure device is constituted by, for example, an electromagnetic valve as shown in fig. 5.
The solenoid valve 1 shown in fig. 5 includes a valve body 3 having an air passage 2, and a solenoid portion 4 attached to the valve body 3.
The air passage 2 includes an upstream passage 2a to which compressed air is supplied and a downstream passage 2b connected to the upstream passage 2a via the inside of the circular hole 5 of the valve body 3. The valve seat 6 is provided at a boundary between the upstream passage 2a and the circular hole 5.
The solenoid portion 4 includes a coil 7, a bobbin 8, a cylindrical guide member 9 made of stainless steel and inserted into a cylindrical portion 8a of the bobbin 8, a fixed core 10 housed and welded to the guide member 9, a movable core 11 movably fitted in the guide member 9, and a spring member 12 biasing the movable core 11 in a direction away from the fixed core 10.
A through hole 14, which is a part of the exhaust passage 13, is provided in the center of the fixed core 10.
The valve body 15 is provided inside the movable core 11. The valve body 15 is seated on the valve seat 6 to close the upstream passage 2a, and the valve body 15 is separated from the valve seat 6 to open the upstream passage 2 a.
A groove 16, which is a part of the exhaust passage 13, is formed in the outer peripheral portion of the movable core 11. The exhaust passage 13 is magnetically attracted to the fixed core 10 through the movable core 11, is blocked in the middle, and is set in a non-communicating state, and is set in a communicating state by being separated from the fixed core 10 through the movable core 11.
In the conventional solenoid valve 1, the coil 7 is excited, the movable core 11 is magnetically attracted to the fixed core 10, the valve body 15 is separated from the valve seat 6, and compressed air flows from the upstream passage 2a into the downstream passage 2b through the circular hole 5. On the other hand, when the energization of the coil 7 is cut off, the movable core 11 is pushed by the spring force of the spring member 12 and separated from the fixed core 10, the valve body 15 is seated on the valve seat 6, and the upstream passage 2a is closed by the valve body 15. In this state, the compressed air in the downstream passage 2b is discharged from the circular hole 5 to the outside through the groove 16 of the movable core 11 and the through hole 14 of the fixed core 10.
Further, patent document 1 discloses a solenoid in which an insulating tape is wound around a guide pipe into which a movable core is inserted, and a coil is directly wound around the insulating tape. With this configuration, the gap between the coil and the fixed core is minimized, and the solenoid can be downsized and power-saving.
Documents of the prior art
Patent document
Patent document 1: japanese patent No. 4808236
Disclosure of Invention
Technical problem to be solved by the invention
In the conventional solenoid valve 1 shown in fig. 5, in a state where the energization of the coil 7 is cut off, the suction surfaces of the fixed core 10 and the movable core 11 are exposed to compressed air. An air pressure device (not shown) is lubricated on the downstream side of the solenoid valve 1, and the compressed air contains much mist-like lubricant. The atomized lubricant adheres to the wall of the air passage 2 and may flow in a liquid state. In addition, there are cases where a liquid including drainage water is mixed in the compressed air. If such a liquid such as lubricating oil or drainage is mixed in the adsorption portion between the fixed core 10 and the movable core 11, the movable core 11 is closely attached to the fixed core 10 via the liquid when the movable core 11 is adsorbed to the fixed core 10. In this close contact state, when the energization to the coil 7 is cut off, the movable core 11 is less likely to be separated from the fixed core 10 due to viscous resistance of oil, surface tension, and the like. In such a case, a delay in the operation of the movable core 11 occurs.
In the conventional solenoid valve 1 shown in fig. 5, a cylindrical guide member 9 for guiding the movable core 11 is welded to the fixed core 10. Therefore, there is a problem that the number of working hours increases when manufacturing the solenoid valve 1.
Further, in order to accommodate the guide member 9 in the bobbin 8, there is a limit in that the outer diameter of the cylindrical portion 8a of the bobbin 8 is increased, and the number of turns per unit length of the coil 7 is increased to increase the output. Further, since the gap between the fixed core 10 and the coil 7 is increased, there is a problem that loss of magnetic flux is increased and power consumption is increased. By adopting the configuration described in patent document 1, the gap between the fixed core 10 and the coil 7 can be narrowed. However, since the work of winding the insulating tape increases, such a configuration cannot be adopted.
The invention aims to provide a solenoid valve which has a movable core operating at high speed, is simple to manufacture, consumes less power and can obtain high output.
Means for solving the problems
In order to achieve the object, the present invention relates to a solenoid valve including: a coil bobbin having a cylindrical portion; a coil wound around the cylindrical portion; a fixed core having a valve body portion provided at one end portion thereof and fixed to one end portion of the cylindrical portion, the valve body portion having a 1 st valve hole extending in a direction parallel to an axis of the cylindrical portion; a movable core movably fitted in the other end portion of the cylindrical portion, and magnetically attracted to the fixed core by energizing the coil; a push rod supported by the fixed core so as to be movable in a direction parallel to the axis, one end of the push rod being inserted into the 1 st valve hole, and the other end of the push rod being connected to the movable core; a valve body movably inserted into the 1 st valve hole; and a spring member that urges the valve body to press the valve body against the push rod, the valve body portion including: an air passage including the 1 st valve hole; and a valve seat that comes into contact with and separates from the valve seat by the valve element reciprocating in the 1 st valve hole, and opens and closes the air passage, and the valve seat is provided with a sealing member that seals between the 1 st valve hole and the valve element, and divides the 1 st valve hole into the air passage side and the plunger side.
The present invention may further include a passage forming member that houses the valve body portion, the passage forming member including: an upstream side passage that supplies compressed air into the 1 st valve hole; a downstream side passage connected to the 1 st valve hole via the valve seat; a 2 nd valve hole that is open in the downstream passage and into which one end portion of the valve body is inserted; and an exhaust passage that opens in the 2 nd valve hole, wherein the valve body has a plate portion that separates from an opening edge of the 2 nd valve hole when seated on the valve seat, and contacts the opening edge of the 2 nd valve hole when separated from the valve seat, thereby closing the 2 nd valve hole.
In the solenoid valve of the present invention, the bobbin and the coil may be embedded in a molding resin.
In the solenoid valve of the present invention, a connection portion between the upstream passage and the 1 st valve hole may be formed by a communication hole that is provided through the valve body so as to open on a hole wall surface of the 1 st valve hole, the valve seat may be provided at an opening end of the 1 st valve hole, and the seal member may be provided on the valve body and movably fitted in the 1 st valve hole.
Effects of the invention
According to the present invention, the movable core is magnetically attracted to the fixed core, and the push rod moves relative to the fixed core and is inserted into the 1 st valve hole while pressing the valve body. When the current to the coil is cut off, the valve body, the push rod, and the movable core are returned to the initial positions by the spring force of the spring member. The moving path of the push rod is separated from the air passage by a sealing member. Therefore, the liquid such as the lubricating oil and the drain water flowing through the air passage does not enter the adsorption portion between the fixed core and the movable core through the moving path of the plunger, and therefore, when the energization to the coil is cut off, the movable core is rapidly separated from the fixed core.
Since the movable core is movably fitted to the cylindrical portion of the bobbin, a guide member for forming a moving path of the movable core is not required, and the solenoid valve can be manufactured more easily than a conventional solenoid valve in which a guide member is welded to a fixed core. Further, since the coil can be wound around the cylindrical portion of the bobbin, the number of turns per unit length of the coil can be increased to increase the output, and the loss of magnetic flux is reduced to reduce power consumption.
Therefore, according to the present invention, it is possible to provide a solenoid valve in which a movable core operates at high speed, and which is simple to manufacture, consumes less power, and can obtain high output.
Drawings
Fig. 1 is a sectional view of a solenoid valve of the present invention.
Fig. 2 is an air circuit diagram including a double valve incorporating the solenoid valve of the present invention.
Fig. 3 is a cross-sectional view showing a main part in an air supply state in an enlarged manner.
Fig. 4 is a cross-sectional view showing a main part in an enlarged manner in a state of exhaust.
Fig. 5 is a sectional view of a conventional solenoid valve.
Detailed Description
An embodiment of the solenoid valve according to the present invention will be described in detail below with reference to fig. 1 to 4.
The electromagnetic valve 21 shown in fig. 1 includes a solenoid 22 positioned on the upper side in fig. 1, a passage forming member 23 supporting the solenoid 22, a valve body 24 housed in the passage forming member 23, and the like. The electromagnetic valve 21 of this embodiment can be used as two pilot valves 26 provided to the double valve 25 shown in fig. 2.
The double valve 25 has 2 valve portions 28 in 1 housing 27. These valve portions 28 are connected in parallel with each other.
The valve portion 28 is constituted by a 3-way valve of a press return type. The pilot valve 26 supplies air pressure (pilot pressure) to the valve portion 28 in a direction opposite to the direction in which the spring force of the return spring 29 acts. The double valve 25 is provided between the compressed air source 30 and the air pressure device 31, is operated by the pilot valve 26, and adopts either the supply method or the exhaust method. The air pressure device 31 is, for example, an air clutch or an air brake of a press machine, although not shown in detail.
In the supply mode, compressed air is supplied from the double valve 25 to the air pressure device 31. In the air discharge mode, the compressed air between the air pressure device 31 and the double valve 25 is discharged through the air discharge passage 32 of the double valve 25. The oil mist device 34 is provided in the air supply passage 33 between the compressed air source and the double valve 25.
As shown in fig. 1, the solenoid 22 of the electromagnetic valve 21 is covered with a molding resin 41. The yoke 42, the bobbin 43, and the coil 44 of the solenoid 22 are embedded in a molding resin 41. The solenoid 22 is configured with the vertical direction as the axial direction in fig. 1. Next, when describing the components of the solenoid valve 21, the lower side of fig. 1 is referred to as one end and the upper side of fig. 1 is referred to as the other end when the positions are shown in the direction parallel to the axial direction of the solenoid 22.
The coil 44 generates magnetic flux by being energized, and is wound around the cylindrical portion 43a of the bobbin 43. The cylindrical portion 43a extends in the axial direction of the solenoid 22. The cylindrical portion 43a is provided with a fixed core 45 and a movable core 46.
The fixed core 45 is composed of a columnar body portion 47 fixed to one end portion of the cylindrical portion 43a, and a valve body portion 48 integrally formed at one end portion of the body portion 47. A 1 st through hole 49 is formed through the axial center portion of the body portion 47. A push rod 50, which will be described later, is movably fitted in the 1 st through hole 49.
The valve body portion 48 is formed in a cylindrical shape, protrudes from the solenoid 22, and is fitted into a circular hole 51 of a passage forming member 23 described later. A 1 st valve hole 52 extending in a direction parallel to the axis C of the cylindrical portion 43a of the solenoid 22 is formed in the axial center portion of the valve body portion 48. The 1 st valve hole 52 of this embodiment is formed on the same axis as the axis C. The opening edge at one end of the 1 st valve hole 52 functions as a valve seat 54 on which a plate portion 53 of the valve body 24 is seated, which will be described later.
O-rings 55 for sealing against the hole wall surface of the circular hole 51 are attached to one end portion and the other end portion of the outer peripheral surface of the valve body portion 48. An annular groove 56 is formed in the center of the valve body 48 in the axial direction. A plurality of (4 in this embodiment) communication holes 57 are provided through the bottom of the annular groove 56. These communication holes 57 open to the hole wall surface of the 1 st valve hole 52 and the bottom of the annular groove 56, and communicate the inside of the 1 st valve hole 52 with the inside of the annular groove 56.
The movable core 46 is movably fitted into the other end portion of the cylindrical portion 43a of the bobbin 43, and magnetically attracted to the fixed core 45 by energizing the coil 44. The movable core 46 is brought into contact with the stopper 43b at the other end of the bobbin 43 by the spring force of a spring member 58 provided in the passage forming member 23, which will be described later, by cutting off the energization to the coil 44.
A 2 nd through hole 61 is provided through one end side of the movable core 46 as an axial center portion. The other end of the push rod 50 is movably fitted in the 2 nd through hole 61. On the other end side of the movable core 46, a 3 rd through hole 62 formed to have a larger diameter than the 2 nd through hole 61 and connected to the 2 nd through hole 61 is provided through. The slide member 63 is movably fitted in one end side of the 3 rd through hole 62. The pin member 64 is fixed to the other end of the 3 rd through hole 62. A coil compression spring 65 is inserted in a compressed state between the slide member 63 and the pin member 64. The slide member 63 is urged toward one end by the spring force of the coil compression spring 65, and contacts the other end of the push rod 50.
The push rod 50 is formed in a circular rod shape, and movably fitted into the 1 st through hole 49 and the 2 nd through hole 61. A pressing portion 50a formed to have a larger diameter than the other portions is provided at one end of the push rod 50. The plunger 50 is formed such that one end faces the inside of the 1 st valve hole 52 of the fixed core 45 in a state where the movable core 46 abuts against the stopper 43b of the bobbin 43. The valve body 24 is pressed by the spring force of the spring member 58 to contact the pressing portion 50a at one end of the push rod 50.
The passage forming member 23 includes a circular hole 51 for accommodating the valve body 48 of the fixed core 45, an upstream side through hole 71 opened to a peripheral surface of the circular hole 51, a downstream side through hole 72 and a 2 nd valve hole 73 opened to one end of the circular hole 51, and an exhaust hole 74 and a vent hole 75 opened to the 2 nd valve hole 73.
The upstream through hole 71 is a hole constituting a part of an upstream passage 76 for supplying compressed air into the 1 st valve hole 52, extends in a direction orthogonal to the axial direction of the solenoid 22, and opens on a hole wall surface (inner circumferential surface) of the circular hole 51. The upstream end of the upstream passage 76 is connected to a supply passage 77 (see fig. 2) that guides compressed air to the two valve portions 28 of the double valve 25. The downstream end of the upstream passage 76 is constituted by the upstream through hole 71, a part of the circular hole 51, and the communication hole 57 of the valve body 48. The connection portion between the upstream passage 76 and the 1 st valve hole 52 is formed by a communication hole 57 provided through the valve body portion 48 so as to open on the hole wall surface of the 1 st valve hole 52.
The downstream side through hole 72 is a hole constituting a part of a downstream side passage 78 for supplying the compressed air flowing out from the 1 st valve hole 52 through the valve seat 54 as the driving air to the valve portion 28 of the double valve 25, extends in a direction parallel to the axial direction of the solenoid 22 from one end of the circular hole 51, and opens at one end of the passage forming member 23. The downstream passage 78 is constituted by the downstream through hole 72 and one end of the circular hole 51 connected to the 1 st valve hole 52 via the valve seat 54. In this embodiment, the downstream passage 78 and the upstream passage 76 correspond to "an air passage including the 1 st valve hole" in the present invention.
The 2 nd valve hole 73 is a non-through hole having a bottom, and extends from one end of the circular hole 51 in a direction opposite to the solenoid 22. Therefore, the 2 nd valve hole 73 opens in the downstream passage 78. The opening shape of the 2 nd valve hole 73 is circular. The 2 nd valve hole 73 is positioned on the same axis as the circular hole 51 and the 1 st valve hole 52.
A vent hole 75 is connected to one end of the 2 nd valve hole 73, and an exhaust hole 74 serving as an exhaust passage 79 is connected to the other end. The exhaust hole 74 and the vent hole 75 extend in a direction orthogonal to the axial direction of the solenoid 22, are open to the side surface (not shown) of the passage forming member 23, and are open to the atmosphere.
The spool 24 is constituted by a spool extending in the axial direction of the solenoid 22. One end portion of the valve body 24 has a small diameter portion 24a on one end side smaller than the diameter of the 2 nd valve hole 73, and is movably fitted into the 2 nd valve hole 73 via a 1 st seal member 81. A spring member 58 that biases the solenoid 22 against the valve body 24 and presses the push rod 50 is provided between one end portion of the valve body 24 and the bottom portion of the 2 nd valve hole 73.
The other end portion of the valve body 24 has a smaller-diameter portion 24b on the other end side than the hole diameter of the 1 st valve hole 52, and is fitted to the 1 st valve hole 52 so as to be movable via the 2 nd seal member 82. The other end of the spool 24 is always in contact with one end of the push rod 50. The 2 nd seal member 82 seals between the 1 st valve hole 52 and the valve body 24, and divides the inside of the 1 st valve hole 52 into an air passage side (one end side) and a push rod 50 side (the other end side).
In this embodiment, the 2 nd seal member 82 corresponds to the "seal member" of the present invention.
A plate portion 53 having an outer diameter larger than that of the other portion is provided at the center portion of the valve body 24 in the axial direction. The plate portion 53 is configured by covering the spool rubber 83 on the large diameter portion 24c of the spool 24. The plate portion 53 is positioned between the valve seat 54 of the valve body portion 48 and the opening edge 73a of the 2 nd valve hole 73 in one end portion of the circular hole 51, and the valve body 24 moves in the axial direction of the solenoid 22 so as to contact either the valve seat 54 or the opening edge 73a of the 2 nd valve hole 73. The valve body 24 reciprocates in the 1 st valve hole 52, and contacts and separates from the valve seat 54, thereby opening and closing the air passage. Specifically, the valve body 24 moves toward one end, so that the plate portion 53 is separated from the valve seat 54 to open the 1 st valve hole 52, and contacts the opening edge 73a of the 2 nd valve hole 73 to close the 2 nd valve hole 73, as shown in fig. 3. Further, as the valve body 24 moves toward the other end side, as shown in fig. 4, the plate portion 53 is seated on the valve seat 54 to close the 1 st valve hole 52, and is separated from the opening edge 73a of the 2 nd valve hole 73 to open the 2 nd valve hole 73.
In the solenoid valve 21 configured as described above, the movable core 46 is magnetically attracted to the fixed core 45 by energizing the coil 44, and moves from the position shown in fig. 1 to one end side of the solenoid 22. With this movement of the movable core 46, the push rod 50 moves relative to the fixed core 45, and is inserted into the 1 st valve hole 52 while pushing the valve body 24 toward the one end side against the spring force of the spring member 58. By the valve body 24 thus moving toward one end side, as shown in fig. 3, the plate portion 53 is separated from the valve seat 54, and the 2 nd valve hole 73 is closed. Then, the compressed air is introduced into the 1 st valve hole 52 from the upstream side through hole 71 through the communication hole 57 of the valve body portion 48 as indicated by an arrow in fig. 3. The compressed air flows into one end of the circular hole 51 through the valve seat 54, further passes through the downstream side through hole 72, and is supplied to the valve portion 28 of the double valve 25 as driving air.
On the other hand, when the energization of the coil 44 is cut off, the spring force of the spring member 58 is transmitted from the valve body 24 to the movable core 46 via the push rod 50, the slide member 63, the helical compression spring 65, the plug member 64, and the like, and these members move to one end side and return to the initial position. By the valve body 24 thus moving toward the other end side, as shown in fig. 4, the plate portion 53 is separated from the opening edge 73a of the 2 nd valve hole 73, and is seated on the valve seat 54 to close the 1 st valve hole 52. Then, the compressed air supplied to the valve portion 28 of the double valve 25 flows into one end portion of the circular hole 51 through the downstream side through hole 72 as shown by the arrow in fig. 4, and is discharged from there to the outside of the electromagnetic valve 21 through the 2 nd valve hole 73 and the exhaust passage 79.
The path of movement of the plunger 50 (the 1 st through hole 49 of the fixed core 45) when the valve body 24 reciprocates in this way is partitioned from the air passage (the upstream passage 76 and the downstream passage 78) by the 2 nd seal member 82.
Therefore, the liquid such as the lubricating oil and the drain water flowing through the air passage does not enter the adsorption portions of the fixed core 45 and the movable core 46 through the moving path of the push rod 50. As a result, when the energization of the coil 44 is cut off, the movable core 46 can be quickly separated from the fixed core 45.
Since the movable core 46 is movably fitted to the cylindrical portion 43a of the bobbin 43, a guide member for exclusively forming a moving path of the movable core 46 is not required, and manufacturing is simplified as compared with a conventional solenoid valve in which a guide member is welded to a fixed core. Further, since the coil 44 can be directly wound around the cylindrical portion 43a of the bobbin 43, the number of turns per unit length of the coil 44 can be increased to increase the output, and the loss of magnetic flux can be reduced to reduce the power consumption.
Therefore, according to this embodiment, it is possible to provide the solenoid valve 21 in which the movable core 46 operates at high speed, and which is simple to manufacture, consumes less power, and can obtain high output.
The solenoid valve 21 of this embodiment includes a passage forming member 23 that houses the valve body portion 48. The passage forming member 23 has an upstream side passage 76 that supplies compressed air into the 1 st valve hole 52, a downstream side passage 78 that is connected to the 1 st valve hole 52 via the valve seat 54, a 2 nd valve hole 73 that opens in the downstream side passage 78 and is inserted into one end portion of the spool 24, and an exhaust passage 79 that opens in the 2 nd valve hole 73.
The valve body 24 has a plate portion 53, and the plate portion 53 is separated from the opening edge 73a of the 2 nd valve hole 73 by being seated on the valve seat 54, and contacts the opening edge 73a of the 2 nd valve hole 73 to close the 2 nd valve hole 73 by being separated from the valve seat 54.
Therefore, according to this embodiment, the 3-way solenoid valve 21 having a high operating speed is obtained. By using the solenoid valve 21 as the pilot valve 26 of the double valve 25, a double valve with high reliability of high-speed operation can be realized.
The bobbin 43 and the coil 44 of this embodiment are embedded in the mold resin 41.
Therefore, the cylindrical portion 43a of the bobbin 43 is reinforced by the mold resin 41, and therefore, the movable core 46 can be firmly supported by the cylindrical portion 43 a. Therefore, the operation of the movable core 46 is stabilized, and the reliability of the high-speed operation is further improved.
In the solenoid valve 21 of this embodiment, the connection portion between the upstream passage 76 and the 1 st valve hole 52 is constituted by the communication hole 57 provided through the valve body portion 48 so as to open on the hole wall surface of the 1 st valve hole 52. The valve seat 54 is provided at the open end of the 1 st valve hole 52. The 2 nd seal member 82 is provided to the valve body 24 and movably fitted to the 1 st valve hole 52.
With this configuration, as shown in fig. 3, the pressure acting on the spool 24 in a state where the upstream passage 76 and the downstream passage 78 communicate with each other is equalized in the axial direction of the solenoid 22. Therefore, when the energization of the coil 44 is cut off and the valve body 24 is returned to the initial position by the spring force of the spring member 58, the air pressure does not become resistance.
Therefore, a solenoid valve capable of realizing higher-speed operation is obtained.
Description of the symbols
21 … solenoid valve; 23 … a passage forming member; 24 … valve core; 41 … molding resin; 43 … coil former; 43a … cylindrical part; 44 … coil; 45 … fixing the core; 46 … movable core; 48 … valve body portion; 50 … push rods; 52 … No. 1 valve opening; 53 … board portion; 54 … a valve seat; 57 … communication holes; 58 … spring member; 73 … No. 2 valve hole; 76 … upstream side passage (air passage); 78 … downstream side passage (air passage); 82 … sealing member 2 (sealing member).
Claims (4)
1. A solenoid valve is characterized by comprising:
a coil bobbin having a cylindrical portion;
a coil wound around the cylindrical portion;
a fixed core having a valve body portion provided at one end thereof and fixed to one end of the cylindrical portion, the valve body portion having a 1 st valve hole extending in a direction parallel to an axis of the cylindrical portion;
a movable core movably fitted in the other end portion of the cylindrical portion, and magnetically attracted to the fixed core by energizing the coil;
a push rod supported by the fixed core so as to be movable in a direction parallel to the axis, one end of the push rod being inserted into the 1 st valve hole, and the other end of the push rod being connected to the movable core;
a valve body movably inserted into the 1 st valve hole; and
a spring member that urges the valve element and urges the valve element to the push rod,
the valve body portion has:
an air passage including the 1 st valve hole; and
a valve seat that is brought into contact with and separated from the valve seat by the valve element reciprocating in the 1 st valve hole to open and close the air passage,
the solenoid valve further includes a sealing member that seals between the 1 st valve hole and the valve body and divides the 1 st valve hole into the air passage side and the rod side.
2. The solenoid valve of claim 1,
further comprises a passage forming member for accommodating the valve body part,
the passage forming member has:
an upstream side passage that supplies compressed air into the 1 st valve hole;
a downstream side passage connected to the 1 st valve hole via the valve seat;
a 2 nd valve hole that is open in the downstream passage and into which one end portion of the valve body is inserted; and
an exhaust passage opening at the 2 nd valve hole,
the valve body has a plate portion that separates from an opening edge of the 2 nd valve hole by being seated on the valve seat, and closes the 2 nd valve hole by separating from the valve seat and contacting the opening edge of the 2 nd valve hole.
3. The solenoid valve according to claim 1 or 2,
the bobbin and the coil are embedded in a molding resin.
4. The solenoid valve of claim 2,
a connection portion between the upstream passage and the 1 st valve hole is formed by a communication hole that is provided through the valve body portion so as to open on a hole wall surface of the 1 st valve hole,
the valve seat is arranged at the opening end of the 1 st valve hole,
the seal member is provided to the valve body and movably fitted in the 1 st valve hole.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2018116774A JP2019219006A (en) | 2018-06-20 | 2018-06-20 | Electromagnetic valve |
| JP2018-116774 | 2018-06-20 |
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| CN110617346A true CN110617346A (en) | 2019-12-27 |
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| CN201910445853.9A Pending CN110617346A (en) | 2018-06-20 | 2019-05-27 | Electromagnetic valve |
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| JP (1) | JP2019219006A (en) |
| CN (1) | CN110617346A (en) |
| TW (1) | TWI748176B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111810661A (en) * | 2020-07-15 | 2020-10-23 | 潘江川 | Dynamic self-pressure-regulating sealing valve with oil mist lubrication seal |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113932039A (en) * | 2021-09-29 | 2022-01-14 | 西安航空学院 | Valve head assembly of aviation electromagnetic valve and aviation electromagnetic valve |
| CN114110205B (en) * | 2021-10-25 | 2022-08-05 | 浙江大学 | Bistable electromagnetic three-way valve |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111810661B (en) * | 2020-07-15 | 2021-06-25 | 苏州玛旭自动化科技有限公司 | Dynamic self-pressure-regulating sealing valve with oil mist lubrication seal |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2019219006A (en) | 2019-12-26 |
| TWI748176B (en) | 2021-12-01 |
| TW202001133A (en) | 2020-01-01 |
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Application publication date: 20191227 |