JP2719507B2 - solenoid valve - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a solenoid valve for controlling a fluid used in an industrial machine, and more particularly to a solenoid valve for controlling a flow of a fluid between a plurality of ports with a single solenoid.

[0002]

2. Description of the Related Art Conventionally, for example, the following are used as solenoid valves which are mainly used for the operation of double-acting actuators. FIG. 8 is a sectional view showing a conventional solenoid valve. This is a solenoid valve having a combined poppet / spool structure. Pilot valve 1 in which coil 102 is arranged so as to surround plunger 101
03, a main valve portion 104 is formed via a communication hole. A main valve 105 for controlling communication or disconnection with each port is fitted into the main valve portion 104. The main valve 105 has a poppet valve 106 at the center and spool valves 107 and 108 at the left and right. Then, the fluid flowing between the ports is shut off and the spool valve 10 is closed.
The lip packings 109, 109,. In the solenoid valve having such a configuration, the main valve 105 is driven in the axial direction by the fluid pressure by the operation of the pilot valve 103, and the poppet valve 105 and the spool valves 107 and 108 formed on the main valve 105 are opened and closed. Depending on the combination, each port is connected or cut off.

[0003]

The above-described 5-port solenoid valve shown in FIG. 8 is an example, and another solenoid valve having a different configuration is used. However, any solenoid valve that drives the valve with one solenoid only has a configuration in which a poppet valve is used in combination with a spool valve. Therefore, when using a spool valve,
As described above, sealing is performed by the lip packings 109 to prevent leakage of the fluid, but it is difficult to cope with the case where a high level of airtightness is required. Therefore, it is conceivable to create a solenoid valve using two 3-port solenoid valves using a poppet valve in order to enhance the sealing performance. However, while this achieves high airtightness by the poppet valve, the use of two solenoids has the disadvantage of increasing the size of the valve itself and increasing the total cost of production.

Accordingly, an object of the present invention is to provide a highly airtight solenoid valve at a low cost in order to solve such a problem. It is another object of the present invention to provide a compact solenoid valve constituted by one solenoid regardless of the number of ports.

[0005]

According to the present invention, there is provided a solenoid valve comprising: a movable iron core having valve bodies at both ends driven by a solenoid; a piston arranged coaxially with the movable iron core and having valve bodies at both ends; A fine hole formed between the movable iron core and the piston, and a valve element at the lower end of the movable iron core and a valve element at the upper end of the piston sandwiching the fine hole are fitted into the fine holes that are in contact with each other. And a rod. Also,
The solenoid valve of the present invention is a movable iron core driven by a solenoid having a valve body at both ends, a plurality of pistons arranged coaxially with the movable iron core and having valve bodies at both ends, the movable iron core and the piston, A pore formed between the pistons, a valve element of the movable iron core and a valve element of the piston sandwiching the pores, or a rod inserted into the pores abutting each other on the valve elements of the piston. And

Further, the solenoid valve of the present invention is characterized in that the fixed core having a valve seat corresponding to the valve element above the movable iron core communicating with a predetermined port, and the fine hole having a valve seat formed in an opening. , A first block formed with a plurality of ports communicating with a predetermined communication hole, a cylinder having an open upper side in which the piston can slide, and a port communicating with a valve hole formed in the cylinder bottom surface. Is formed, and the movable iron core, the pores, and the piston are disposed coaxially, and the rod abuts on the valve element below the movable iron core and the valve element above the piston. Thus, it is desirable that the first block and the second block are integrally fixed.

[0007] The solenoid valve according to the present invention may further include a fixed iron core having a valve seat corresponding to a valve element above the movable iron core communicating with a predetermined port, and the fine hole having a valve seat formed in an opening. , A first block formed with a plurality of ports communicating with a predetermined communication hole, a cylinder having an open upper part in which the piston can slide, and a port communicating with a valve hole formed in the cylinder bottom surface. A second block having a second block formed therein, the cylinder being slidably open at the upper side, the pore having a valve seat formed in the opening, and a plurality of communicating holes communicating with a predetermined communication hole. A third block having a port formed therein, wherein the movable iron core, each of the pores, and each of the pistons are disposed coaxially, and each of the rods is mounted on the movable iron or the piston; To abut both
It is preferable that one or more third blocks are integrally fixed between the first block and the second block.

Further, in the solenoid valve according to the present invention, the movable iron core communicates a first valve body for controlling communication with a first port formed in the fixed iron core, and communication between a fine hole of the first block. A second valve body controlled by an upper opening, wherein a piston provided in the second block controls communication of pores of the first block by a lower opening; A fourth valve body that controls the communication of a fifth port that communicates with the cylinder of the second block, wherein the pores of the one block communicate with the second port from the upper opening, and in the course of the pore path. It is desirable that the first port communicates with the third port and the lower port communicates with the fourth port.

Further, in the solenoid valve according to the present invention, the movable iron core communicates with a first valve body that controls communication with a first port formed in the fixed iron core, and communicates with a fine hole of the first block. A second valve body controlled by an upper opening, wherein a piston provided in the second block controls communication of pores of the third block by a lower opening; A fourth valve body for controlling communication of a seventh port communicating with a cylinder of the second block, wherein a piston provided in the third block is provided with a piston in the first block or the other third port. A fifth valve body that controls the communication of the pores of the block with the lower opening, and a sixth valve body that controls the communication of the pores of the second block or the other third block with the upper opening. Wherein the pores of the first block are in
And a third port in the middle of the pore path, a lower port to a fourth port, and the third port.
It is desirable that the pores of the block communicate with the fifth port from the lower opening and communicate with the sixth port in the course of the pores.

[0010]

In the solenoid valve of the present invention, the movable iron core is driven by the solenoid. At this time, the piston arranged coaxially has the rod inserted into the small hole between the movable iron core and the piston. The valve is provided at both ends of the movable iron core and the piston, and the valve is closed or opened, and the direction of the fluid flowing through the solenoid valve body is controlled. Is controlled. In the solenoid valve of the present invention, the movable iron core is driven by the solenoid. At this time, a plurality of pistons arranged coaxially fit in the fine holes between the movable iron core and the piston or between the piston and the piston. Interlocked through the inserted rod or by being released from the pressing force of the rod, the movable iron core and the valve bodies provided at both ends of the plurality of pistons close or open the valve, and the electromagnetic valve The direction of the fluid flowing through the body is controlled.

In the solenoid valve of the present invention, the movable iron core is driven by a solenoid, and the valve is opened and closed in conjunction with the piston by being released from the pressing force of the rod via the rod or the rod. When the movable iron core is separated from the fixed iron core, the movable iron core and the piston are both lowered, so that the valve hole formed in the cylinder bottom is closed and the port formed in the second block is shut off. In a state where the movable core is in communication with predetermined ports of the port formed in the fixed core and the plurality of ports formed in the first block while the movable core is in contact with the fixed core, the movable core is Since both the piston and the piston are raised, the valve seat formed in the fixed iron core is closed, and the port communicating with the valve seat is in a closed state, and the plurality of ports formed in the first block are closed. By communicating between beauty predetermined port of the port formed in the second block, the direction of the fluid flowing through the solenoid valve body for each operation is controlled.

In the solenoid valve of the present invention, the movable iron core is driven by the solenoid, and the valve is opened and closed in conjunction with the piston by being released from the pressing force of the rod via the rod or the rod. When the movable iron core is separated from the fixed iron core, since the movable iron core and each piston are both lowered, the valve hole formed in the cylinder bottom is closed, and the port formed in the second block is closed. When the movable core is in contact with the fixed core while the communication between the fixed core and the predetermined ports of the plurality of ports formed in the first and third blocks is established, Is a state in which the movable iron core and the piston are both raised, so that the valve seat formed in the fixed iron core is closed, and the port communicating with the valve seat is shut off.
By communicating between a plurality of ports formed in the block and predetermined ports of the ports formed in the second block, the direction of the fluid flowing in the solenoid valve body is controlled for each operation.

Further, in the solenoid valve of the present invention, when the movable iron core is lowered, the piston of the second block is also lowered, so that the second valve body of the fixed iron core causes the fine holes of the first block to move. Is closed, and the fourth valve body of the piston closes the fifth port communicating with the cylinder, and between the first port and the second port, and between the third port and the third port. When the movable core rises and is in contact with the fixed core while the movable core is in contact with the fixed core, the piston of the second block is also raised. The first port formed in the fixed iron core is shut off and the third port of the piston is closed.
The lower opening of the pores of the first block is blocked by the valve body of the first block, and by communicating between the second port and the third port and between the fourth port and the fifth port, The direction of the fluid flowing in the solenoid valve body is controlled for each operation.

Further, in the solenoid valve of the present invention, when the movable iron core is lowered, the pistons of the second and third blocks are also lowered. The upper opening of the second block is blocked by the sixth valve body, and the seventh port communicating with the cylinder is blocked by the fourth valve body, While the communication between the first port and the second port, the communication between the third port and the fourth port, and the communication between the fifth port and the sixth port, the movable iron core rises and comes into contact with the fixed iron core. In this case, since the pistons of the second and third blocks are also raised, the first valve blocks the first port formed in the fixed iron core, and the fifth valve body blocks the first block. The lower opening of the pores of
The lower opening of the pores of the third block is blocked by the valve body of the third block, and between the second port and the third port, between the fourth port and the sixth port, and between the fifth port and the fifth port. 7
The direction of the fluid flowing through the solenoid valve body is controlled for each operation by communicating between the ports.

[0015]

Next, a specific embodiment of the solenoid valve of the present invention having the above-mentioned configuration will be described with reference to the drawings. FIGS. 1 to 4 are sectional views showing an embodiment of the solenoid valve according to the present invention. FIGS. 1 and 2 show a state in which the solenoid is not energized, and FIGS. 3 and 4 show an energization to the solenoid. Indicates time. FIG. 2 or FIG. 4 is a partial cross-sectional view when FIG. 1 and FIG. 3 are viewed from the direction A, respectively. The solenoid valve 1 of the present embodiment is configured to have one solenoid 2. A pipe 3 made of a magnetic material is disposed in the solenoid 2, and a movable core 4 is fitted into the pipe 3 by sliding contact with the pipe 3, and a fixed core 5 is fixed above the movable core 4. At this time, the movable iron core 4 and the fixed iron core 5 are arranged so as to be located in the lower half and the upper half, respectively, of the solenoid 2.

The fixed iron core 5 has a communication hole 6 formed in a shaft core portion, an upper end portion of which is formed as a first port 7, and a lower end portion of which is provided with a valve hole 8a in which the diameter of the communication hole 6 is reduced. A seat 8 is formed. On the other hand, the movable iron core 4 is provided with a flange 12 having a plurality of vertically extending grooves 12 a on a peripheral side surface thereof, and is urged downward by a spring 13 provided on the flange 12. A spring 9 is inserted into a hollow portion of the movable iron core 4, and a first valve body 10 is inserted into an upper end portion of the movable iron core 4 so as to be able to move up and down by being biased by the spring 9. Incidentally, the flange 12 is formed to be longer than the movable iron core 4, and the second valve body 11 is fixedly provided inside the extended portion to fix the other end of the spring 9.

A body in which the first block 21A and the second block 21B are overlapped is formed below the movable iron core 4. The first block 21A and the second block 21B can be separated, and the number of ports can be increased by adding another block between the two blocks as in a second embodiment (FIG. 6) described later. In the first block 21A, an upper valve chamber 22 is formed at the upper end with a cover member 21m so as to wrap the lower end of the movable iron core 4 on which the second valve body 11 is mounted, while at the lower end, The lower valve chamber 24 is formed between the two blocks 21B. In the first block 21A, a fine hole 23 for communicating the upper valve chamber 22 and the lower valve chamber 24 is formed so as to penetrate the axial core portion. Room 22
A valve seat 25 is formed on the lower valve chamber 24 side while a valve seat 26 is formed on the lower valve chamber 24 side.

Incidentally, a rod 27 is inserted into the small hole 23. FIG. 5 shows a perspective view of the rod 27. The rod 27 has a cylindrical rod 27a formed with a fine hole 23.
Splashes 27b and 27c having the same diameter as the inner diameter of the upper and lower parts are formed vertically. The splashes 27b and 27c are formed by cutting square slits 27d in four sides of a disk. Then, the rod 27 is fitted so that the outer peripheral surfaces of the splashes 27 b and 27 c slide in the fine holes 23. On the other hand, the first block 21A is further provided with second to fourth ports, and the second port 28 communicates with the upper valve chamber 22,
The third port 29 communicates with the small hole 23, and the fourth port 30 communicates with the lower valve chamber 24.

A cylinder 31 is formed in the lower valve chamber 24 at the upper end of the second block 21B, and a piston 32 is slidably fitted therein. Piston 32
Has a plurality of grooves 32a formed vertically on the peripheral side surface. A flange is formed at the upper end, and this piston 3
A spring 38 is provided so that the spring 2 is urged upward.
A third valve body 33 is fixed to the upper end of the hollow portion of the piston 32, and a fourth valve body 34 is fitted to the lower end so as to be vertically movable. And, in the hollow portion of the piston 32, the third
A spring 35 is fitted between the valve body 33 and the fourth valve body 34 so as to be in contact with them. Further, the second block 21B
The valve seat 36 corresponding to the fourth valve body 34 is formed on the bottom surface of the cylinder 31, and the fifth port 37 formed on the lower surface of the second block 21 </ b> B is configured to communicate with the valve hole of the valve seat 36. I have.

Next, the solenoid valve 1 having the above configuration will be described.
The operation of will be described. First, when the solenoid 2 is not energized, the movable iron core 4 receives a downward urging force only by the spring 13. Therefore, the first valve body 10 is separated from the valve seat 8, while the second valve body 11 comes into contact with the valve seat 25. At this time, the rod 27 inserted into the small hole 23 is
The third valve body 33 is pressed downward by the valve body 11 as it is. As a result, the piston 32 urged upward by the spring 38 slides downward in the cylinder 31, so that the third valve body 33 is separated from the valve seat 26 while the fourth valve body 34 is moved to the valve seat 37. Will come into contact with.

That is, when power is not supplied, as shown in FIGS. 1 and 2, the fifth port 36 is shut off and the other first port 7 is closed.
In addition, the fourth to fourth ports 30 communicate with each other. Specifically, the fluid flowing from the first port 7 flows from the upper valve chamber 22 to the second port 28 through the groove 12a of the movable iron core 4 (or vice versa). And the third port 29
Fluid flows from the lower valve chamber 24 to the fourth port 30 (or vice versa) through the slits 27d of the rod 27 in the small holes 23, and the fluid flows between the third and fourth ports 29, 30.

On the other hand, when the solenoid 2 is energized, a magnetic field is generated, the stationary core 5 is excited, and the movable core 4 is
Is driven upward against the urging force of the above to abut against the fixed iron core 5. Therefore, the first valve body 10 provided at the upper end of the movable iron core 4 comes into contact with the valve seat 8, and the second valve body 11 is separated from the valve seat 25. At this time, the rod 27
Since the rod 27 is released from the downward pressing force from the second valve body 11, the piston 32 that has been pressed downward through the valve lifts to push up the rod 27 by the urging force of the spring 38. Therefore, the third valve body 33 comes into contact with the valve seat 26 and the fourth valve body 34 is separated from the valve seat 37.

That is, at the time of energization, as shown in FIGS. 3 and 4, the first port 7 is shut off, and the other second to fifth ports 28 to 36 communicate. Specifically, the second port 2
Fluid flowing from the upper port 8 flows through the slit 23 d of the rod 27 from the upper valve chamber 22 through the slit 27 d to the third port 29 (or vice versa), between the second and third ports 28, 29, and the fifth port 36. Fluid flows from the lower valve chamber 24 to the fourth port 30 (or vice versa) through the groove 32a of the piston 32, and the fluid flows between the fourth and fifth ports 30, 36.

As described above, according to the solenoid valve 1 of the present embodiment, the driving force received from the solenoid 2 is transmitted by the rod 27 inserted into the small hole 23 while using only one solenoid 2. With this configuration, all the valves that control communication between the five ports could be poppet valves. Therefore, by using all of the first to fourth valve bodies 10 to 34 as poppet valves, it is possible to obtain high airtightness of the valves when the valves are closed. Further, since the solenoid valve 1 having five ports is constituted by one solenoid 2, the solenoid valve 1 itself can be reduced in size.

Next, a solenoid valve according to a second embodiment will be described with reference to the drawings. Since the solenoid valve of the present embodiment includes the configuration of the first embodiment, the same reference numerals are given to the common parts, and the description thereof will be omitted. Here, FIG.
FIG. 7 is a cross-sectional view showing the solenoid valve of the present embodiment (when not energized), and FIG. 7 is a partial cross-sectional view of FIG. By the way, in the first embodiment, the 5-port solenoid valve 1 has been described. However, the solenoid valve 51 of the present embodiment is a 7-port solenoid valve.
The feature is that the number of ports is increased as described above. Specifically, the third block 21C is provided between the first block 21A and the second block 21B of the main body.

Therefore, the configuration of the solenoid valve 51 of this embodiment will be described focusing on the third block 21C. Incidentally, in the solenoid valve 1, the lower valve chamber 24 is
Although it was configured between 1A and the second block 21B,
In the solenoid valve 51 of the present embodiment, the third block 21C and the second
It is arranged between the block 21B. On the other hand, an intermediate valve chamber 52 is formed between the third block 21C and the first block 21A. A cylinder 53 is formed in the middle valve chamber 52 at the upper end of the third block 21C. A piston 54 of the same type as the piston 32 is slidably fitted in the cylinder 53. Specifically, a fifth valve body 55 is fixed to the upper end of the hollow portion, and a sixth valve body 56 is fitted to the lower end so as to be vertically movable. In the hollow portion of the piston 54, a spring 57 is fitted between the fifth valve body 55 and the sixth valve body 56 in contact with both. Further, a plurality of grooves 54a are formed vertically on the peripheral side surface of the piston 54.

In the third block 21C, a small hole 58 for communicating the cylinder 53 with the lower valve chamber 24 is formed.
A valve seat 59 is formed in the cylinder 53 at the opening of the small hole 58, and a valve seat 60 is formed on the lower valve chamber 24 side. By the way, the rod 27 is inserted into the small hole 58 similarly to the small hole 23. On the other hand, the third block 21C further includes the sixth
And a seventh port are formed so that the sixth port 61 communicates with the lower valve chamber 24 and the seventh port 62 communicates with the small hole 58.

Next, the operation of the solenoid valve 51 having such a configuration and having seven ports according to the second embodiment will be described.
First, when the solenoid 2 is not energized, the movable iron core 4 is urged downward, the first valve body 10 is separated from the valve seat 8, and the second valve body 11 comes into contact with the valve seat 25. And
The rod 27 in the small hole 23 is pushed by the second valve body 11 and presses the fifth valve body 55 downward as it is.
Slides downward in the cylinder 53, and the fifth valve body 55 separates from the valve seat 26, while the sixth valve body 56 comes into contact with the valve seat 59. Further, since the rod 27 inserted into the small hole 58 is pushed by the sixth valve body 56 and presses the third valve body 33 downward as it is, the piston 32 slides downward in the cylinder 31 and The third valve body 33 separates from the valve seat 60, while the fourth valve body 34 comes into contact with the valve seat 37.

That is, when power is not supplied, the fifth port 36 is shut off and the other first port 7, second port 28, third port 29, fourth port 30, and sixth and seventh ports 61, 61
62 communicates. Specifically, the fluid flowing from the first port 7 passes through the groove 12 a of the movable
Fluid flowing from the third port 29 between the first and second ports 7 and 28 from the second port 28 (or vice versa)
The fluid flowing from the lower valve chamber 24 to the fourth port 30 (or vice versa) through the slits 27d of the rod 27 through the small holes 23 (or vice versa) flows between the third and fourth ports 29 and 30, and the fluid flowing from the sixth port 61 Through the valve chamber 24 and the seventh
6th and 7th port 6 flowing to port 62 (or vice versa)
1, 62 communicate with each other.

On the other hand, when the solenoid 2 is energized, the movable iron core 4 is driven upward to contact the fixed iron core 5, the first valve element 10 contacts the valve seat 8, and the second valve element 11 It will be separated from the seat 25. At this time, the piston 54
Is released from the pressing force of the rod 27, and rises so as to push up the rod 27 by the urging force of the spring 63, so that the fifth valve body 55 contacts the valve seat 26 and the sixth valve body 56 It will be separated from the seat 59.
Further, the rod 27 inserted into the small hole 58 is connected to the sixth valve body 5.
Since the piston 32 is released from the pressing force from 6, the piston 32 rises so as to push up the rod 27 by the urging force of the spring 38. Therefore, the third valve body 33 comes into contact with the valve seat 60, and the fourth valve body 34 is separated from the valve seat 37.

That is, at the time of energization, the first port 7 is shut off, and the other second port 28 to seventh port 62 communicate with each other. Specifically, the fluid flowing from the second port 28
The slit 2 of the rod 27 extends from the upper valve chamber 22 to the inside of the fine hole 23.
Fluid flowing in from the fourth port 30 between the second and third ports 28 and 29 flowing through the third port 29 through the 7d (or vice versa) flows through the middle valve chamber 52 and the groove 54 a of the piston 54 into the fine holes 58. Flows from port 7 to port 62 (or vice versa)
Fluid flowing between the fourth and seventh ports 30 and 62 and from the fifth port 36 flows from the lower valve chamber 24 to the sixth port 61 through the groove 32 a of the piston 32 (or vice versa).
The fifth and sixth ports 36 and 61 communicate with each other.

As described above, according to the solenoid valve 1 of this embodiment, the third
With the addition of the block 21C, the driving force received from the solenoid 2 is transmitted by the rod 27 while the solenoid valve uses only one solenoid 2 as in the first embodiment. Could be all poppet valves. Therefore,
Since all of the first to sixth valve bodies 10 to 56 are poppet valves, high airtightness of the valves when the valves are closed can be obtained. In addition, one solenoid 2 provides 7
Since the port solenoid valve 1 was configured, the solenoid valve 1 itself could be reduced in size. Further, by adding the third block 21C, a 7-port solenoid valve can be easily configured, and its handling is facilitated.

The solenoid valve of the present invention is not limited to the above embodiment, and various changes can be made without departing from the gist of the invention. For example, in the above embodiment, the 5-port and 7-port solenoid valves have been described. However, the number of ports may be increased by adding another block.

[0034]

According to the solenoid valve of the present invention, a movable iron core having a valve body at both ends and a piston having a valve body at both ends coaxially are inserted into a fine hole formed therebetween. Since the valve bodies of the movable iron core and the piston can be used as poppet valves, the valve body of the movable iron core and the piston can be provided as a poppet valve, and a highly airtight electromagnetic valve can be provided at low cost.
Alternatively, it has become possible to provide a compact solenoid valve constituted by one solenoid. In addition, the solenoid valve of the present invention is configured such that a movable iron core having valve bodies at both ends and a plurality of pistons having valve bodies at both ends coaxially are inserted into pores formed therebetween. The valve elements of the movable iron core and the piston can be poppet valves, so that a highly airtight electromagnetic valve can be provided at low cost, or Thus, it has become possible to provide a compact solenoid valve constituted by one solenoid regardless of the number of ports.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a first embodiment of a solenoid valve according to the present invention when power is not supplied.

FIG. 2 is a partial cross-sectional view showing a first embodiment of the solenoid valve according to the present invention when power is not supplied.

FIG. 3 is a cross-sectional view illustrating a first embodiment of the solenoid valve according to the present invention when energized.

FIG. 4 is a partial cross-sectional view showing a first embodiment of the solenoid valve according to the present invention when energized.

FIG. 5 is an external perspective view showing a rod.

FIG. 6 is a sectional view showing a second embodiment of the solenoid valve according to the present invention.

FIG. 7 is a partial sectional view showing a second embodiment of the solenoid valve according to the present invention.

FIG. 8 is a sectional view showing a conventional solenoid valve.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Solenoid valve 2 Solenoid 4 Movable iron core 5 Fixed iron core 7 1st port 10 1st valve body 11 2nd valve body 21A 1st block 21B 2nd block 23 Micropore 27 Rod 28 2nd port 29 3rd port 30 4th port 32 piston 33 third valve body 34 fourth valve body 36 fifth port

Claims (6)

(57) [Claims] 1. A motor driven upward by a solenoid .
Is urged downward by one spring, and the movable core with the valve element at both ends, it is disposed on the movable iron core and coaxially Rutotomoni second spring
A piston urged upward and provided with a valve body at both ends, coaxially with the movable iron core and the piston, and
Is formed between the formed pores, and rods inserted in the pores, the inner walls of the pores and the outer periphery of the rod between the movable iron core and the piston
Possess a flow path, wherein the movable core the lower end of the valve which is biased downward by the first spring
The body pushes the upper end of the rod while pressing the upper end of the rod.
By contacting the mouth, the upper end of the flow path is closed.
At the same time, the valve body at the upper end of the piston
Separate from the lower opening of the pore while being pressed by the lower end
By opening the lower end of the flow path, the lower end of the movable iron core driven upward by the solenoid is opened .
When the valve element is separated from the upper opening of the pore,
At the same time as opening the upper end of the flow path,
The valve body at the upper end of the piston urged upward by the
Contact the lower opening of the pore while pressing the lower end of the pad
A solenoid valve that opens a lower end of the flow path . 2. A comprising a valve body at both ends, and biased movable core downward in the first spring while <br/> driven upward by the solenoid, the disposed movable core coaxially Rutotomoni second With a spring
A plurality of pistons urged upward and provided with valve bodies at both ends, coaxially with the movable iron core and each piston, and between the movable iron core and the piston and between the pistons. one by one form of between a plurality of pores formed one by one, a plurality of rods inserted one by one into each pore, the inner and outer peripheries of the rods of each pore between
Multiple possess a flow path, the first movable iron core the lower end of the valve that is urged downward by springs
The body pushes the upper end of the rod while pressing the upper end of the rod.
Each of the rods pressed at the lower end of each rod
Make sure that the valve element at the lower end of the piston is in contact with the upper opening of each
At the same time as closing the upper end of each flow path,
The valve body at the top of each piston pressed at the bottom of the pad
The lower end of each channel is separated from the lower opening of
While the lower end of the movable iron core driven upward by the solenoid.
As the valve body moves away from the upper opening of the pore,
The valve at the lower end of each piston urged upward by two springs
By separating from the upper opening of the hole,
At the same time as the end is opened, each second spring is urged upward.
The valve body at the lower end of each piston contacts the lower opening of each pore.
A solenoid valve that closes the lower end of each flow path . 3. The solenoid valve according to claim 1, wherein a fixed iron core having a valve seat corresponding to a valve element above the movable iron core communicating with a predetermined port, and a valve seat formed in an opening. A first block in which the pores and a plurality of ports communicating with a predetermined communication hole are formed; a cylinder in which the piston is slidably opened; and a valve hole formed in the cylinder bottom surface. A second block having a communicating port formed therein, wherein the movable iron core, the pores, and the piston are disposed coaxially, and the rod is provided between a valve element below the movable iron core and a valve element above the piston. An electromagnetic valve, wherein a first block and a second block are integrally fixed so as to contact each other. 4. The solenoid valve according to claim 2, wherein a fixed iron core having a valve seat corresponding to a valve element above the movable iron core communicating with a predetermined port is formed, and a valve seat is formed in an opening. A first block in which the pores and a plurality of ports communicating with a predetermined communication hole are formed; a cylinder in which the piston is slidable with an open upper portion; and a valve hole formed in the cylinder bottom surface. A second block having a communicating port formed therein, the piston being slidable and having an open upper part, the opening having a valve seat formed in the opening, and communicating with a predetermined communicating hole; The movable iron core, the respective pores, and the respective pistons are disposed coaxially, and the respective rods are mounted on the movable iron core or the piston. In order to abut both of the valve elements, Solenoid valve one or more of the third block is characterized in that it is fixed integrally between said block second block. 5. The solenoid valve according to claim 3, wherein the movable iron core controls communication of a first port formed in the fixed iron core, and a pore of the first block. A second valve body that controls communication of the first block with an upper opening, and a piston provided in the second block controls communication of pores of the first block with a lower opening. And a fourth valve body that controls the communication of a fifth port that communicates with the cylinder of the second block. The pores of the one block communicate with the second port from the upper opening, An electromagnetic valve communicating with a third port in the middle of a hole path and communicating with a fourth port from a lower opening. 6. The solenoid valve according to claim 4, wherein the movable iron core controls communication of a first port formed in the fixed iron core, and a pore of the first block. A second valve body that controls communication of the third block with an upper opening, and a piston provided in the second block controls communication of pores of the third block with a lower opening. And a fourth valve body that controls communication of a seventh port that communicates with the cylinder of the second block. A piston provided in the third block is provided with a piston in the first block or the other port. A fifth valve body that controls the communication of the pores of the third block with the lower opening, and a sixth valve that controls the communication of the pores of the second block or the other third block with the upper opening. A valve body, wherein the pores of the first block are connected to the second port from the upper opening. Communicated, communicated in the course that the pore path to the third port,
The lower opening communicates with the fourth port, and the pores of the third block communicate with the fifth port from the lower opening and communicate with the sixth port along the pore path. Solenoid valve.