TWI853555B - Electromagnetic valve manifold - Google Patents

Abstract

A solenoid valve manifold comprises: a solenoid valve having a discharge port; a manifold base having a discharge flow path connected to the discharge port; and a check valve. The check valve has a valve core, a valve housing having a valve seat, and a force-applying member. The valve housing has: a valve chamber for accommodating the valve core; a peripheral wall for defining the valve chamber; a valve hole for connecting the valve chamber with the discharge port; and a discharge opening for connecting the valve chamber with the discharge flow path. The check valve is arranged in the discharge flow path. The discharge opening is formed on the peripheral wall, and at least a portion thereof overlaps with the valve seat in a direction orthogonal to the moving direction of the valve core.

Description

Solenoid Valve Manifold

This disclosure is about solenoid valve manifolds.

The solenoid valve manifold has a solenoid valve and a manifold base. The solenoid valve has a discharge port. The manifold base has a mounting surface, and the solenoid valve is mounted on the mounting surface. The manifold base has a discharge flow path. The discharge flow path opens on the mounting surface and is connected to the discharge port.

In addition, the electromagnetic valve manifold is equipped with a check valve such as that disclosed in Japanese Patent Gazette No. 11-280927. The check valve has a valve core, a valve housing, and a force-applying member. The valve housing has a valve seat, a valve chamber, a peripheral wall, a valve hole, and a discharge opening. The valve chamber accommodates the valve core. The peripheral wall is cylindrical and separates the valve chamber. The valve hole connects the valve chamber with the discharge port. The discharge opening connects the valve chamber with the discharge flow path. The valve seat is a part of the valve housing, and is an annular portion around the opening of the valve hole that opens in the valve chamber. The valve seat protrudes into the valve chamber. The valve core is seated on the valve seat. The force-applying member applies force to the valve core toward the valve seat. The valve core moves back and forth in the axial direction of the peripheral wall in the valve chamber, thereby approaching or moving away from the valve seat. The check valve allows the fluid to flow from the discharge port to the discharge flow path, and prevents the fluid from flowing from the discharge flow path to the discharge port. In this way, the erroneous operation of the electromagnetic valve caused by the backflow of the fluid from the discharge flow path to the discharge port can be avoided.

The check valve disclosed in the above-mentioned publication is arranged on the inner side of the discharge port. If the valve core leaves the valve seat, the fluid flowing out from the discharge port through the valve hole to the valve chamber passes through the gap between the valve core and the peripheral wall and reaches the discharge opening. Then, the fluid is discharged to the discharge flow path through the discharge opening. In such a case, if the flow path cross-sectional area of the gap between the valve core and the peripheral wall is not sufficiently ensured, the fluid is not easy to be discharged smoothly from the discharge port to the discharge flow path, so the pressure loss of the fluid increases. However, if the size of the valve core is reduced in order to ensure the flow path cross-sectional area of the gap between the valve core and the peripheral wall as much as possible, the diameter of the valve seat will also become smaller according to the size of the valve core, so the flow path cross-sectional area of the valve hole will become smaller as a result. Therefore, it is not easy for the fluid to be discharged smoothly from the discharge port to the discharge flow path, so the pressure loss of the fluid increases.

The electromagnetic valve manifold of one aspect of the present disclosure is provided with: an electromagnetic valve having a discharge port; a manifold base having a mounting surface and a discharge flow path, the electromagnetic valve being mounted on the mounting surface, the discharge flow path opening on the mounting surface and communicating with the discharge port; and a check valve allowing fluid to flow from the discharge port to the discharge flow path and preventing fluid from flowing from the discharge flow path to the discharge port. The check valve has: a valve core; a valve housing having a valve seat, the valve core being seated on the valve seat; and a force applying member applying force to the valve core toward the valve seat. The valve housing has: a valve chamber that accommodates the valve core; a peripheral wall that defines the valve chamber; a valve hole that connects the valve chamber with the discharge port; and a discharge opening that connects the valve chamber with the discharge flow path. The valve seat is a part of the valve housing and is an annular portion around the opening of the valve hole that opens the valve chamber, and the valve seat protrudes into the valve chamber. The valve core is configured to move back and forth in the axial direction of the peripheral wall in the valve chamber, thereby approaching or leaving the valve seat. The check valve is arranged in the discharge flow path. The discharge opening is formed on the peripheral wall, and at least a portion overlaps with the valve seat in a direction orthogonal to the moving direction of the valve core.

The electromagnetic valve manifold of other aspects of the present disclosure is provided with: an electromagnetic valve having a discharge port; a manifold base having a mounting surface and a discharge flow path, the electromagnetic valve is mounted on the mounting surface, the discharge flow path opens on the mounting surface and is connected to the discharge port; and a check valve, which allows the flow of fluid from the discharge port to the discharge flow path and prevents the flow of fluid from the discharge flow path to the discharge port. The check valve has: a valve core; a valve housing having a valve seat, the valve core is seated on the valve seat; and a force member, which applies force to the valve core toward the valve seat. The valve housing has: a valve chamber that accommodates the valve core; a peripheral wall that defines the valve chamber; a valve hole that connects the valve chamber with the discharge port; and a discharge opening that connects the valve chamber with the discharge flow path. The valve seat is a part of the valve housing and is an annular portion around the opening of the valve hole that opens in the valve chamber. The valve core is configured to approach or leave the valve seat by reciprocating in the axial direction of the peripheral wall in the valve chamber. The check valve is arranged in the discharge flow path. The discharge opening is formed on the peripheral wall and is provided at least over the movement range of the surface of the valve core that contacts the valve seat in the movement direction of the valve core.

Below, one implementation method of implementing the electromagnetic valve manifold is described according to Figures 1 to 8.

<Solenoid valve manifold 10>

As shown in FIG1 , the solenoid valve manifold 10 has one or more solenoid valves 11 and one or more manifold bases 30. FIG1 shows one solenoid valve 11 and one manifold base 30. For example, a plurality of solenoid valves 11 are arranged in a row. For example, a plurality of manifold bases 30 are arranged in the arrangement direction of the solenoid valves 11 corresponding to the arranged solenoid valves 11. Therefore, the arrangement direction of the manifold base 30 is consistent with the arrangement direction of the solenoid valves 11.

<Solenoid valve 11>

Each solenoid valve 11 has a valve housing 12. The valve housing 12 is in the shape of a rectangular block. The valve housing 12 has a valve body 13, a first connecting block 14, and a second connecting block 15. The valve body 13 is in the shape of a rectangular block. The first connecting block 14 is connected to the first end of the long side direction of the valve body 13. The second connecting block 15 is connected to the second end of the long side direction of the valve body 13. The valve body 13 has a main body facing surface 13a facing the manifold base 30.

<Slide valve hole 16>

The valve housing 12 has a sliding valve hole 16. The sliding valve hole 16 is formed in the valve body 13. The sliding valve hole 16 is a circular hole. The sliding valve hole 16 extends in the long side direction of the valve body 13. The first end of the sliding valve hole 16 opens at the first end face of the valve body 13 in the long side direction. The second end of the sliding valve hole 16 opens at the second end face of the valve body 13 in the long side direction. Therefore, the sliding valve hole 16 penetrates the valve body 13 in the long side direction.

<Slide valve 17>

Each solenoid valve 11 has a slide valve 17. The slide valve 17 is accommodated in the slide valve hole 16. The slide valve 17 is accommodated in the slide valve hole 16 in a state where the axial direction of the slide valve 17 is consistent with the axial direction of the slide valve hole 16. The slide valve 17 can reciprocate in the slide valve hole 16.

<Ports of solenoid valve 11>

Each solenoid valve 11 has a supply port P, a first output port A, a second output port B, a first discharge port R1, and a second discharge port R2. Therefore, each solenoid valve 11 of the present embodiment is a five-way solenoid valve. The first discharge port R1 and the second discharge port R2 are discharge ports of the solenoid valve 11. Therefore, the solenoid valve 11 has two discharge ports.

The supply port P, the first output port A, the second output port B, the first discharge port R1 and the second discharge port R2 are formed in the valve body 13. The supply port P, the first output port A, the second output port B, the first discharge port R1 and the second discharge port R2 are respectively connected to the slide valve hole 16.

The first discharge port R1, the first output port A, the supply port P, the second output port B, and the second discharge port R2 are arranged in this order from the first end toward the second end in the long side direction of the valve body 13. The supply port P, the first output port A, the second output port B, the first discharge port R1, and the second discharge port R2 have a first end connected to the slide valve hole 16. The supply port P, the first output port A, the second output port B, the first discharge port R1, and the second discharge port R2 have a second end opened on the main body facing surface 13a of the valve body 13.

<1st piston 18 and 2nd piston 19>

Each solenoid valve 11 has a first piston 18 and a second piston 19. The first piston 18 is in the shape of a disk. The first piston 18 is connected to the first end of the slide valve 17. The first piston 18 moves integrally with the slide valve 17. The second piston 19 is in the shape of a disk. The second piston 19 is connected to the second end of the slide valve 17. The second piston 19 moves integrally with the slide valve 17.

<1st pilot pressure chamber 21>

A first piston housing recess 20 in the shape of a circular hole is formed in the first connecting block 14. The first piston 18 is housed in the first piston housing recess 20 so as to be reciprocatingly movable. Furthermore, a first pilot pressure chamber 21 is defined by the first piston housing recess 20 and the first piston 18. A pilot fluid is supplied and discharged to the first pilot pressure chamber 21.

<Second pilot pressure chamber 23>

A second piston housing recess 22 in the shape of a circular hole is formed in the second connecting block 15. The second piston 19 is housed in the second piston housing recess 22 so as to be reciprocating. Furthermore, the second pilot pressure chamber 23 is defined by the second piston housing recess 22 and the second piston 19. The pilot fluid is supplied and discharged to the second pilot pressure chamber 23.

<1st pilot valve V1 and 2nd pilot valve V2>

Each solenoid valve 11 has a first pilot valve V1 and a second pilot valve V2. Therefore, the solenoid valve 11 is a double solenoid type pilot solenoid valve. The voltage application to the first pilot valve V1 and the second pilot valve V2 is performed by an external control machine such as a programmable logic controller (PLC) not shown in the figure.

<1st position and 2nd position of slide valve 17>

The slide valve 17 can selectively switch between the first position and the second position. For example, it is assumed that the voltage is applied to the first pilot valve V1 and the voltage application to the second pilot valve V2 is stopped. In this case, the first pilot valve V1 supplies the compressed fluid from the unillustrated fluid supply source as the pilot fluid to the first pilot pressure chamber 21. On the other hand, the second pilot valve V2 discharges the pilot fluid in the second pilot pressure chamber 23 to the atmosphere. As a result, the slide valve 17 moves toward the second piston housing recess 22. As a result, the slide valve 17 switches to the first position in which the supply port P is connected to the first output port A and the second output port B is connected to the second discharge port R2. In addition, when the slide valve 17 is switched to the first position, the supply port P and the second output port B are isolated from each other, and the first output port A and the first discharge port R1 are isolated from each other.

In addition, for example, it is assumed that the voltage application to the first pilot valve V1 is stopped and the voltage application to the second pilot valve V2 is performed. In this case, the second pilot valve V2 supplies the compressed fluid from the fluid supply source as the pilot fluid to the second pilot pressure action chamber 23. On the other hand, the first pilot valve V1 discharges the pilot fluid in the first pilot pressure action chamber 21 to the atmosphere. As a result, the slide valve 17 moves toward the first piston housing recess 20. As a result, the slide valve 17 switches to the second position in which the supply port P and the second output port B are connected and the first output port A and the first discharge port R1 are connected. In addition, when the slide valve 17 is switched to the second position, the supply port P and the first output port A are isolated from each other, and the second output port B and the second discharge port R2 are isolated from each other.

Therefore, the first pilot valve V1 supplies and discharges the pilot fluid to the first pilot pressure chamber 21, and the second pilot valve V2 supplies and discharges the pilot fluid to the second pilot pressure chamber 23, so that the slide valve 17 reciprocates in the slide valve hole 16 between the first position and the second position. The connection state between the ports is switched by switching the slide valve 17 to the first position and the second position. In addition, FIG. 1 shows the state where the slide valve 17 is in the second position.

<Manifold base 30>

Each manifold base 30 is in the shape of a rectangular block. Each manifold base 30 has a mounting surface 30a. A corresponding solenoid valve 11 is mounted on the mounting surface 30a. The long side direction of each manifold base 30 is consistent with the long side direction of the valve housing 12.

Each manifold base 30 has a supply flow path 31, a first output flow path 32, a second output flow path 33, a first exhaust flow path 34, and a second exhaust flow path 35. The supply flow path 31, the first output flow path 32, the second output flow path 33, the first exhaust flow path 34, and the second exhaust flow path 35 have a first end portion opened on the mounting surface 30a. The first exhaust flow path 34 and the second exhaust flow path 35 are exhaust flow paths of the manifold base 30. Therefore, the manifold base 30 has two exhaust flow paths.

The first end of the supply flow path 31 is connected to the supply port P. The first end of the first output flow path 32 is connected to the first output port A. The first end of the second output flow path 33 is connected to the second output port B. The first end of the first discharge flow path 34 is connected to the first discharge port R1. The first end of the second discharge flow path 35 is connected to the second discharge port R2.

The second end of the supply flow path 31 is connected to a fluid supply source (not shown) via a pipe, etc. The second end of the first output flow path 32 and the second end of the second output flow path 33 are connected to a fluid press (not shown) via a pipe, etc., respectively.

<1st discharge flow path 34>

As shown in FIG. 2 , the first discharge flow path 34 has a first flow path 34a and a second flow path 34b. The first flow path 34a extends from the mounting surface 30a toward the surface 30b on the side opposite to the mounting surface 30a in the manifold base 30. The first flow path 34a has a first end portion that opens on the mounting surface 30a and communicates with the first discharge port R1. The first flow path 34a has a second end portion that communicates with the second flow path 34b. Therefore, the second flow path 34b is connected to the second end portion of the first flow path 34a.

The second flow path 34b extends in a direction orthogonal to the extension direction of the first flow path 34a. Therefore, the second flow path 34b extends in a direction intersecting the extension direction of the first flow path 34a. The second flow path 34b extends in the width direction of the manifold base 30. The first end of the second flow path 34b opens at the first side surface 30c located on one side of the width direction of the manifold base 30. The second end of the second flow path 34b opens at the second side surface 30d located on the other side of the width direction of the manifold base 30. Therefore, the second flow path 34b penetrates the manifold base 30 in the width direction. The second flow paths 34b of the manifold bases 30 adjacent to each other in the arrangement direction are connected to each other. Therefore, the second flow paths 34b of all the manifold bases 30 are connected to each other in the arrangement direction, thereby forming a common discharge flow path. The second flow path 34b is connected to the atmosphere.

<Second discharge flow path 35>

As shown in FIG. 3 , the second discharge flow path 35 has a first flow path 35a and a second flow path 35b. The first flow path 35a extends from the mounting surface 30a toward the surface 30b on the side opposite to the mounting surface 30a in the manifold base 30. The first flow path 35a has a first end portion that opens on the mounting surface 30a and communicates with the second discharge port R2. The first flow path 35a has a second end portion that communicates with the second flow path 35b. Therefore, the second flow path 35b is connected to the second end portion of the first flow path 35a.

The second flow path 35b extends in a direction orthogonal to the extension direction of the first flow path 35a. Therefore, the second flow path 35b extends in a direction intersecting the extension direction of the first flow path 35a. The second flow path 35b extends in the width direction of the manifold base 30. The first end of the second flow path 35b opens at the first side surface 30c of the manifold base 30. The second end of the second flow path 35b opens at the second side surface 30d of the manifold base 30. Therefore, the second flow path 35b penetrates the manifold base 30 in the width direction. The second flow paths 35b of the manifold bases 30 adjacent in the arrangement direction are connected to each other. Therefore, by connecting the second flow paths 35b of all the manifold bases 30 in the arrangement direction, a common exhaust flow path is formed. The second flow path 35b is connected to the atmosphere.

<Pad 36>

As shown in FIG1 , the solenoid valve manifold 10 has an annular gasket 36. The gasket 36 is, for example, in the form of a thin plate. The gasket 36 seals the valve housing 12 of each solenoid valve 11 and each manifold base 30.

<Check valve 40>

The solenoid valve manifold 10 is provided with a check valve 40. The check valve 40 is disposed in the first discharge flow path 34 and the second discharge flow path 35, respectively. In addition, in the following description, the check valve 40 disposed in the first discharge flow path 34 is sometimes described as "the first check valve 40A", and the check valve 40 disposed in the second discharge flow path 35 is sometimes described as "the second check valve 40B". The first check valve 40A allows the flow of fluid from the first discharge port R1 to the first discharge flow path 34, and prevents the flow of fluid from the first discharge flow path 34 to the first discharge port R1. The second check valve 40B allows the flow of fluid from the second discharge port R2 to the second discharge flow path 35, and prevents the flow of fluid from the second discharge flow path 35 to the second discharge port R2. In addition, since the structure of the first check valve 40A is the same as that of the second check valve 40B, the first check valve 40A and the second check valve 40B are sometimes simply described as "check valve 40".

As shown in FIG. 4 , the check valve 40 has a valve core 41, a valve housing 42, and a force-applying member 43. The valve housing 42 and the valve body 13 of the electromagnetic valve 11 are separate components.

<Valve housing 42>

The valve housing 42 has a housing body 44 and a housing cover 45. The housing body 44 is cylindrical. The housing cover 45 has a plate-shaped end wall 45a and a cylindrical peripheral wall 45b. The peripheral wall 45b extends from the outer peripheral portion of the end wall 45a. The housing cover 45 is assembled to the housing body 44 by being stopped at the outer peripheral surface of the housing body 44 by the end of the peripheral wall 45b on the side opposite to the end wall 45a.

<Valve chamber 46>

The valve housing 42 has a valve chamber 46. The valve chamber 46 is defined by the housing body 44 and the housing cover 45. Specifically, the valve chamber 46 is a space defined by the first end surface located on one side of the housing body 44 in the axial direction, and the end wall 45a and the peripheral wall 45b of the housing cover 45. Therefore, the valve housing 42 has a cylindrical peripheral wall 45b that defines the valve chamber 46. The valve chamber 46 accommodates the valve core 41. The movement direction of the valve core 41 in the valve chamber 46 is consistent with the axial direction of the peripheral wall 45b.

<Valve hole 47>

The housing body 44 has a valve hole 47. Therefore, the valve housing 42 has a valve hole 47. The valve hole 47 penetrates the housing body 44 in its axial direction. The first end of the valve hole 47 opens at the first end surface of the housing body 44. Therefore, the valve hole 47 is connected to the valve chamber 46. The second end of the valve hole 47 opens at the second end surface of the housing body 44 located on the side opposite to the housing cover 45.

<Valve 48>

The housing body 44 has a valve seat 48. Therefore, the valve housing 42 has a valve seat 48. The valve seat 48 is the first end face of the housing body 44. The valve seat 48 is an annular portion around the opening of the valve hole 47 that opens in the valve chamber 46, and protrudes into the valve chamber 46. Therefore, the valve seat 48 is a part of the valve housing 42. The valve core 41 is seated on the valve seat 48. The valve core 41 moves back and forth in the axial direction of the peripheral wall 45b in the valve chamber 46, thereby approaching or leaving the valve seat 48. The valve core 41 has a back side 41a on the side opposite to the valve seat 48.

<Force-applying member 43>

The urging member 43 urges the valve core 41 toward the valve seat 48. The urging member 43 is a spring. The urging member 43 is accommodated in the valve chamber 46. The first end of the urging member 43 is supported by the end wall 45a of the housing cover 45. The second end of the urging member 43 is supported by the back surface 41a of the valve core 41.

<Discharge opening 49>

The housing cover 45 has one or more discharge openings 49. Therefore, the valve housing 42 has one or more discharge openings 49. For example, a plurality of discharge openings 49 are formed on the peripheral wall 45b. In the present embodiment, four discharge openings 49 are formed on the peripheral wall 45b. The four discharge openings 49 are arranged at equal intervals in the circumferential direction of the peripheral wall 45b. Therefore, the four discharge openings 49 are arranged at 90 degrees in the circumferential direction of the peripheral wall 45b. Each discharge opening 49 penetrates the peripheral wall 45b.

The housing cover 45 is assembled to the housing body 44 in such a manner that the edge of each discharge opening 49 close to the housing body 44 is continuous with the first end surface of the housing body 44. Thus, a portion of each discharge opening 49 overlaps with the valve seat 48 in a direction orthogonal to the moving direction of the valve core 41.

Each discharge opening 49 extends at least to the same position as the valve seat 48 in the moving direction of the valve core 41. Each discharge opening 49 may also extend beyond the valve seat 48 in the moving direction of the valve core 41 and toward a side away from the valve core 41. Each discharge opening 49 may also be provided at least throughout the moving range of the surface of the valve core 41 in contact with the valve seat 48 in the moving direction of the valve core 41. For example, in the fully open state of the valve core 41 shown in FIG. 2, each discharge opening 49 is provided in a range that at least extends from the position of the valve seat 48 to the position of the surface of the valve core 41 opposite to the valve seat 48.

<Breathing hole 50>

The housing cover 45 has one or more breathing holes 50. Therefore, the valve housing 42 has one or more breathing holes 50. For example, a plurality of breathing holes 50 are formed in the peripheral wall 45b at a location close to the end wall 45a. Each breathing hole 50 penetrates the peripheral wall 45b.

<Valve core 41>

The valve core 41 is seated on the valve seat 48, thereby isolating the connection between the valve hole 47 and the valve chamber 46. Therefore, the state in which the valve core 41 is seated on the valve seat 48 is the state in which the check valve 40 is closed. On the other hand, the valve core 41 allows the connection between the valve hole 47 and the valve chamber 46 by leaving the valve seat 48. Therefore, the state in which the valve core 41 leaves the valve seat 48 is the state in which the check valve 40 is opened.

<Leak detection groove 51>

As shown in FIG. 5 and FIG. 6 , one or more leakage detection grooves 51 are formed in the valve core 41. The leakage detection grooves 51 are formed on the back side 41a of the valve core 41 and are part of the portion overlapping with the valve seat 48 in the moving direction of the valve core 41. In this embodiment, two leakage detection grooves 51 are formed on the back side 41a of the valve core 41.

<Flange 52>

As shown in FIG. 4 , the housing body 44 has one or more flanges 52. Therefore, the valve housing 42 has one or more flanges 52. The flange 52 is provided at the end of the housing body 44 on the side opposite to the housing cover 45. The flange 52 is in the shape of a thin plate and extends from the outer peripheral surface of the housing body 44 in a direction orthogonal to the axial direction of the housing body 44. In the present embodiment, two flanges 52 protrude from the housing body 44. In addition, in FIG. 4 , for the sake of convenience of illustration, only one of the two flanges 52 is illustrated.

<Relationship between the first check valve 40A and the first discharge flow path 34>

As shown in Fig. 2 and Fig. 7, the first check valve 40A is inserted into the first discharge flow path 34 in a state where the axial direction of the peripheral wall 45b coincides with the extension direction of the first flow path 34a. The housing body 44 and the inner wall surface of the first flow path 34a are sealed by the sealing member 53. As shown in Fig. 2, the portion of the peripheral wall 45b where the discharge opening 49 is formed protrudes from the first flow path 34a to the second flow path 34b. Therefore, the first check valve 40A is arranged in the first discharge flow path 34 in a state where the axial direction of the peripheral wall 45b coincides with the extension direction of the first flow path 34a, and at least the portion of the peripheral wall 45b where the discharge opening 49 is formed protrudes from the first flow path 34a to the second flow path 34b. Furthermore, two of the four discharge openings 49 are connected to the second flow path 34b in a state where the axial direction of the two discharge openings 49 is consistent with the extension direction of the second flow path 34b. Each discharge opening 49 is connected to the second flow path 34b. Therefore, each discharge opening 49 connects the valve chamber 46 to the first discharge flow path 34. In addition, each breathing hole 50 connects the space between the back surface 41a of the valve core 41 and the valve housing 42 to the second flow path 34b of the first discharge flow path 34.

As shown in FIG. 7 , each flange 52 is placed on the mounting surface 30a around the opening of the first end of the first flow path 34a. The valve body 13 is mounted on the manifold base 30, so that each flange 52 is clamped by the valve body 13 and the manifold base 30. The first check valve 40A is clamped by the valve body 13 and the manifold base 30 through each flange 52, so that it can be detachably arranged in the first discharge flow path 34. The valve hole 47 of the first check valve 40A connects the valve chamber 46 with the first discharge port R1.

<Relationship between the second check valve 40B and the second discharge flow path 35>

As shown in Fig. 3 and Fig. 7, the second check valve 40B is inserted into the second discharge flow path 35 in a state where the axial direction of the peripheral wall 45b coincides with the extension direction of the first flow path 35a. The housing body 44 and the inner wall surface of the first flow path 35a are sealed by the sealing member 53. As shown in Fig. 3, the portion of the peripheral wall 45b where the discharge opening 49 is formed protrudes from the first flow path 35a to the second flow path 35b. Therefore, the second check valve 40B is arranged in the second discharge flow path 35 in a state where the axial direction of the peripheral wall 45b coincides with the extension direction of the first flow path 35a, and at least the portion of the peripheral wall 45b where the discharge opening 49 is formed protrudes from the first flow path 35a to the second flow path 35b. Furthermore, two of the four discharge openings 49 are connected to the second flow path 35b in a state where the axial direction of the two discharge openings 49 is consistent with the extension direction of the second flow path 35b. Each discharge opening 49 is connected to the second flow path 35b. Therefore, each discharge opening 49 connects the valve chamber 46 to the second discharge flow path 35. In addition, each breathing hole 50 connects the space between the back surface 41a of the valve core 41 and the valve housing 42 to the second flow path 35b of the second discharge flow path 35.

As shown in FIG. 7 , each flange 52 is placed on the mounting surface 30a around the opening of the first end of the first flow path 35a. The valve body 13 is mounted on the manifold base 30, so that each flange 52 is clamped by the valve body 13 and the manifold base 30. The second check valve 40B is clamped by the valve body 13 and the manifold base 30 through each flange 52, so that it can be detachably arranged in the second discharge flow path 35. The valve hole 47 of the second check valve 40B connects the valve chamber 46 with the second discharge port R2.

Next, the function of this implementation method is explained.

For example, when the slide valve 17 is switched to the first position, the fluid supplied to the supply port P is output to the fluid press through the first output port A and the first output flow path 32. In addition, the fluid from the fluid press flows toward the second discharge flow path 35 through the second output flow path 33, the second output port B, and the second discharge port R2.

At this time, the pressure of the fluid flowing from the second discharge port R2 toward the second discharge flow path 35 opposes the force of the urging member 43, causing the valve core 41 to leave the valve seat 48. As a result, the second check valve 40B becomes open. A portion of each discharge opening 49 overlaps the valve seat 48 in a direction orthogonal to the moving direction of the valve core 41. Therefore, when the valve core 41 leaves the valve seat 48, the fluid flowing from the second discharge port R2 through the valve hole 47 to the valve chamber 46 will not pass through the gap between the valve core 41 and the peripheral wall 45b before reaching the discharge opening 49. Therefore, the fluid flowing out from the second discharge port R2 through the valve hole 47 to the valve chamber 46 does not pass through the gap between the valve core 41 and the peripheral wall 45b, but is discharged to the second discharge flow path 35 through each discharge opening 49. Therefore, the fluid is smoothly discharged from the second discharge port R2 to the second discharge flow path 35. The fluid discharged to the second discharge flow path 35 is discharged to the outside from the second discharge flow path 35.

In addition, when the valve core 41 of the second check valve 40B leaves the valve seat 48, the fluid between the back surface 41a of the valve core 41 and the valve housing 42 is discharged to the second discharge flow path 35 through each breathing hole 50. Therefore, each breathing hole 50 of the second check valve 40B discharges the fluid between the back surface 41a of the valve core 41 and the valve housing 42 to the second discharge flow path 35. Therefore, it is possible to avoid a pressure increase between the back surface 41a of the valve core 41 and the valve housing 42 when the valve core 41 leaves the valve seat 48. Therefore, it is possible to avoid a problem in which the valve core 41 is pushed back toward the valve seat 48 due to such a pressure increase. As a result, the valve core 41 can be suppressed from vibrating when the valve core 41 leaves the valve seat 48.

The valve core 41 of the first check valve 40A is seated on the valve seat 48 by the force of the biasing member 43. As a result, the first check valve 40A becomes closed. Therefore, it is possible to prevent the fluid discharged from another solenoid valve 11 and flowing in the second flow path 34b from flowing back to the first discharge port R1. Therefore, it is possible to prevent the solenoid valve 11 from erroneously operating.

On the other hand, as shown in FIG1 , when the slide valve 17 is switched to the second position, the fluid supplied to the supply port P is output to the fluid press through the second output port B and the second output flow path 33. Furthermore, the fluid from the fluid press flows toward the first discharge flow path 34 through the first output flow path 32, the first output port A, and the first discharge port R1.

At this time, the pressure of the fluid flowing from the first discharge port R1 toward the first discharge flow path 34 counteracts the force of the urging member 43 and causes the valve core 41 to leave the valve seat 48. As a result, the first check valve 40A becomes open. A portion of each discharge opening 49 overlaps the valve seat 48 in a direction orthogonal to the moving direction of the valve core 41. Therefore, when the valve core 41 leaves the valve seat 48, the fluid flowing from the first discharge port R1 through the valve hole 47 to the valve chamber 46 will not pass through the gap between the valve core 41 and the peripheral wall 45b before reaching the discharge opening 49. Therefore, the fluid flowing out from the first discharge port R1 through the valve hole 47 to the valve chamber 46 does not pass through the gap between the valve core 41 and the peripheral wall 45b, but is discharged to the first discharge flow path 34 through each discharge opening 49. Therefore, the fluid is smoothly discharged from the first discharge port R1 to the first discharge flow path 34. The fluid discharged to the first discharge flow path 34 is discharged to the outside from the first discharge flow path 34.

In addition, when the valve core 41 of the first check valve 40A leaves the valve seat 48, the fluid between the back surface 41a of the valve core 41 and the valve housing 42 is discharged to the first discharge flow path 34 through each breathing hole 50. Therefore, each breathing hole 50 of the first check valve 40A discharges the fluid between the back surface 41a of the valve core 41 and the valve housing 42 to the first discharge flow path 34. Therefore, it is possible to avoid a pressure increase between the back surface 41a of the valve core 41 and the valve housing 42 when the valve core 41 leaves the valve seat 48. Therefore, it is possible to avoid a problem in which the valve core 41 is pushed back toward the valve seat 48 due to such a pressure increase. As a result, the valve core 41 can be suppressed from vibrating when the valve core 41 leaves the valve seat 48.

The valve core 41 of the second check valve 40B is seated on the valve seat 48 by the force of the biasing member 43. As a result, the second check valve 40B becomes closed. Therefore, it is possible to prevent the fluid discharged from another solenoid valve 11 and flowing in the second flow path 35b from flowing back to the second discharge port R2. Therefore, it is possible to prevent the solenoid valve 11 from erroneously operating.

As shown in FIG8 , for example, it is assumed that an operator mistakenly stores the valve core 41 in the valve chamber 46 in such a manner that the back surface 41a of the valve core 41 of the first check valve 40A faces the valve seat 48. In this case, when the valve core 41 is seated on the valve seat 48, the valve hole 47 and the valve chamber 46 are connected via the leakage detection groove 51. Therefore, the first discharge port R1 and the first discharge flow path 34 are always connected, so the operator can detect the leakage of the fluid and thus detect the incorrect assembly. In addition, the same applies to the case where the operator mistakenly stores the valve core 41 in the valve chamber 46 in such a way that the back surface 41a of the valve core 41 of the second check valve 40B faces the valve seat 48, so the detailed description is omitted.

The following effects can be obtained in the above-mentioned implementation method. In addition, the effect of the first check valve 40A is the same as the effect of the second check valve 40B, so in the following effect description, only the effect of the first check valve 40A is described.

(1) The first check valve 40A is disposed in the first discharge flow path 34. A portion of the discharge opening 49 overlaps the valve seat 48 in a direction perpendicular to the movement direction of the valve core 41. Accordingly, if the valve core 41 leaves the valve seat 48, the fluid flowing out from the first discharge port R1 through the valve hole 47 to the valve chamber 46 does not pass through the gap between the valve core 41 and the peripheral wall 45b before reaching the discharge opening 49. Therefore, the fluid flowing out from the first discharge port R1 through the valve hole 47 to the valve chamber 46 does not pass through the gap between the valve core 41 and the peripheral wall 45b, but is discharged to the first discharge flow path 34 through the discharge opening 49. Therefore, the fluid is smoothly discharged from the first discharge port R1 to the first discharge flow path 34, thereby suppressing the pressure loss of the fluid.

(2) The discharge opening 49 is connected to the second flow path 34b in a state where the axial direction of the discharge opening 49 is consistent with the extension direction of the second flow path 34b. The wall surface forming the first discharge flow path 34 does not exist at the discharge destination from the discharge opening 49. Therefore, the fluid flowing out from the first discharge port R1 through the valve hole 47 to the valve chamber 46 will not collide with the wall surface of the first discharge flow path 34, and will be smoothly discharged to the second flow path 34b through the discharge opening 49. Therefore, the pressure loss of the fluid can be further easily suppressed.

(3) The valve housing 42 has a breathing hole 50 for discharging the fluid between the back surface 41a of the valve core 41 and the valve housing 42 to the first discharge flow path 34. Thus, for example, when the valve core 41 leaves the valve seat 48, the fluid between the back surface 41a of the valve core 41 and the valve housing 42 can be discharged to the first discharge flow path 34 through the breathing hole 50. Therefore, it is possible to avoid a pressure increase between the back surface 41a of the valve core 41 and the valve housing 42 when the valve core 41 leaves the valve seat 48. Therefore, it is possible to avoid a problem in which the valve core 41 is pushed back toward the valve seat 48 due to the pressure increase as described above. As a result, the vibration of the valve core 41 when the valve core 41 leaves the valve seat 48 can be suppressed, thereby achieving improved reliability.

(4) The valve housing 42 and the valve body 13 of the solenoid valve 11 are separate components. The valve housing 42 has a flange portion 52 clamped by the valve body 13 and the manifold base 30. Accordingly, when performing maintenance on the first check valve 40A, for example, the first check valve 40A can be removed from the first discharge flow path 34 by releasing the clamping of the flange portion 52 between the valve body 13 and the manifold base 30. The valve housing 42 and the valve body 13 of the solenoid valve 11 are separate components. Therefore, even if, for example, the first check valve 40A needs to be replaced with a new first check valve 40A, the valve body 13 does not need to be replaced with a new valve body 13. Therefore, cost reduction can be achieved.

(5) The back surface 41a of the valve core 41 has a leakage detection groove 51 at a portion of the portion overlapping with the valve seat 48 in the moving direction of the valve core 41. Accordingly, for example, when the operator mistakenly stores the valve core 41 in the valve chamber 46 in a manner such that the back surface 41a of the valve core 41 faces the valve seat 48, when the valve core 41 is seated on the valve seat 48, the valve hole 47 and the valve chamber 46 are connected via the leakage detection groove 51. Therefore, the first discharge port R1 and the first discharge flow path 34 become always connected, so the operator can detect the leakage of the fluid and grasp the incorrect assembly.

In addition, the above-mentioned implementation method can be implemented as follows. The above-mentioned implementation method and the following variant examples can be implemented in combination with each other within the scope of technical non-contradiction.

In the embodiment, a portion of the discharge opening 49 overlaps with the valve seat 48 in a direction perpendicular to the moving direction of the valve core 41, but the present invention is not limited thereto. For example, the entire discharge opening 49 may overlap with the valve seat 48 in a direction perpendicular to the moving direction of the valve core 41. In short, it is sufficient that at least a portion of the discharge opening 49 overlaps with the valve seat 48 in a direction perpendicular to the moving direction of the valve core 41.

In the implementation method, the axial direction of the discharge opening 49 may not be consistent with the extension direction of the second flow path 34b, 35b.

In the embodiment, four discharge openings 49 are formed on the peripheral wall 45b, but the present invention is not limited thereto, and the number of discharge openings 49 formed on the peripheral wall 45b is not particularly limited. For example, six discharge openings 49 may be formed on the peripheral wall 45b. The six discharge openings 49 may also be arranged at equal intervals in the circumferential direction of the peripheral wall 45b. Therefore, the six discharge openings 49 may also be arranged at 60 degrees in the circumferential direction of the peripheral wall 45b.

In the embodiment, a plurality of breathing holes 50 are formed in the peripheral wall 45b near the end wall 45a, but the invention is not limited thereto, and may be formed in the end wall 45a. In short, the breathing hole 50 can discharge the fluid between the back surface 41a of the valve core 41 and the valve housing 42 to the first discharge flow path 34 or the second discharge flow path 35.

In an embodiment, the valve housing 42 may not have the breathing hole 50.

In the embodiment, the leakage detection groove 51 may not be formed on the back side 41a of the valve core 41.

In the implementation method, the force-applying member 43 may not be a spring, for example, it may be an elastic body such as a rubber member that can be elastically deformed. In short, the force-applying member 43 only needs to be a member that applies force to the valve core 41 toward the valve seat 48.

In an embodiment, for example, the valve housing 42 and the valve body 13 of the electromagnetic valve 11 may also be formed integrally. In this case, the flange portion 52 is not required.

In the embodiment, the solenoid valve 11 may be, for example, a four-way solenoid valve in which the second discharge port R2 is omitted. In short, the solenoid valve 11 only needs to have at least one discharge port. In addition, the solenoid valve 11 may also be a three-way solenoid valve having a supply port, an output port, and a discharge port.

10: Solenoid valve manifold

11: Solenoid valve

12: Valve housing

13: Valve body

13a: Opposite side of the main body

14: 1st link block

15: Second link block

16: Sliding valve hole

17: Slide valve

18: 1st piston

19: 2nd piston

20: 1st piston storage recess

21: 1st pilot pressure chamber

22: Second piston storage recess

23: Second pilot pressure chamber

30: Manifold base

30a: Loading surface

30b: The surface opposite to the mounting surface 30a

30c: 1st side

30d: 2nd side

31: Supply flow path

32: 1st output flow path

33: Second output flow path

34: 1st discharge flow path

34a: 1st flow path

34b: Second flow path

35: Second discharge flow path

35a: 1st flow path

35b: Second flow path

36: Gasket

40: Check valve

40A: No. 1 check valve

40B: 2nd check valve

41: Valve core

41a: Back

42: Valve housing

43: Force-applying component

44: Shell body

45: Housing cover

45a: End wall

45b: Peripheral wall

46: Valve chamber

47: Valve hole

48: Valve seat

49: discharge opening

50: Breathing hole

51: Leak detection slot

52: flange

53: Sealing components

A: No. 1 export port

B: Second export port

P: Supply port

R1: No. 1 outlet

R2: 2nd outlet

V1: 1st pilot valve

V2: 2nd pilot valve

FIG1 is a cross-sectional view showing a solenoid valve manifold in an embodiment.

Figure 2 is a cross-sectional view taken along line 2-2 in Figure 1.

Figure 3 is a cross-sectional view taken along line 3-3 in Figure 1.

Figure 4 is a cross-sectional view of the check valve.

Figure 5 is a side view of the valve core.

Figure 6 is a rear view of the valve core.

Figure 7 is a top view showing the manifold base and check valve.

FIG8 is a cross-sectional view showing a state where the valve core is housed in the valve chamber with the back side of the valve core facing the valve seat.

30: Manifold base

30a: Loading surface

30c: 1st side

30d: 2nd side

34: 1st discharge flow path

34a: 1st flow path

34b: Second flow path

40: Check valve

40A: No. 1 check valve

41: Valve core

41a: Back

42: Valve housing

43: Force-applying component

44: Shell body

45: Housing cover

45a: End wall

45b: Peripheral wall

46: Valve chamber

47: Valve hole

48: Valve seat

49: discharge opening

50: Breathing hole

53: Sealing components

Claims (10)

A solenoid valve manifold is characterized in that it has: an solenoid valve having a discharge port; a manifold base having a mounting surface and a discharge flow path, the solenoid valve is mounted on the mounting surface, the discharge flow path opens on the mounting surface and is connected to the discharge port; and a check valve that allows fluid to flow from the discharge port to the discharge flow path and prevents fluid from flowing from the discharge flow path to the discharge port, the check valve has: a valve core; a valve housing having a valve seat, the valve core is seated on the valve seat; and a force-applying member that applies force to the valve core toward the valve seat, the valve housing has: a valve chamber that accommodates the valve core; a peripheral wall that defines the valve chamber; The valve hole connects the valve chamber with the discharge port; and the discharge opening connects the valve chamber with the discharge flow path. The valve seat is a part of the valve housing and is an annular portion around the opening of the valve hole opening in the valve chamber. The valve seat protrudes into the valve chamber. The valve core is configured to move back and forth in the axial direction of the peripheral wall in the valve chamber to approach or leave the valve seat. The check valve is arranged in the discharge flow path. The discharge opening is formed in the peripheral wall, and at least a part of it overlaps with the valve seat in a direction orthogonal to the moving direction of the valve core. The electromagnetic valve manifold as described in claim 1, wherein, the discharge flow path has: a first flow path extending from the mounting surface toward the surface of the manifold base on the side opposite to the mounting surface, having a first end opening on the mounting surface, and a second end on the side opposite to the first end; and a second flow path connected to the second end of the first flow path and extending in a direction intersecting the extension direction of the first flow path, the axial direction of the peripheral wall is consistent with the extension direction of the first flow path, and at least the portion of the peripheral wall where the discharge opening is formed protrudes from the first flow path to the second flow path, the discharge opening is connected to the second flow path in a state where the axial direction of the discharge opening is consistent with the extension direction of the second flow path. The solenoid valve manifold as recited in claim 1, wherein, the valve core has a back side on the side opposite to the valve seat, the valve housing has a breathing hole, and the breathing hole discharges the fluid between the back side of the valve core and the valve housing to the discharge flow path. As described in claim 1, the solenoid valve manifold, wherein, the valve housing and the valve body of the solenoid valve are separate components, the valve housing has a flange portion clamped by the valve body and the manifold base. An electromagnetic valve manifold as recited in any one of claims 1 to 4, wherein, the valve core has a back surface on the side opposite to the valve seat, and the back surface has a leakage detection groove in a portion of the portion overlapping with the valve seat in the moving direction of the valve core. A solenoid valve manifold is characterized in that it has: an solenoid valve having a discharge port; a manifold base having a mounting surface and a discharge flow path, the solenoid valve is mounted on the mounting surface, the discharge flow path opens on the mounting surface and is connected to the discharge port; and a check valve that allows fluid to flow from the discharge port to the discharge flow path and prevents fluid from flowing from the discharge flow path to the discharge port, the check valve has: a valve core; a valve housing having a valve seat, the valve core is seated on the valve seat; and a force-applying member that applies force to the valve core toward the valve seat, the valve housing has: a valve chamber that accommodates the valve core; a peripheral wall that defines the valve chamber; The valve hole connects the valve chamber with the discharge port; and the discharge opening connects the valve chamber with the discharge flow path. The valve seat is a part of the valve housing and is an annular portion around the opening of the valve hole opening in the valve chamber. The valve core is configured to move back and forth in the axial direction of the peripheral wall in the valve chamber to approach or leave the valve seat. The check valve is arranged in the discharge flow path. The discharge opening is formed in the peripheral wall and is provided at least over the movement range of the surface of the valve core in contact with the valve seat in the movement direction of the valve core. The electromagnetic valve manifold as recited in claim 6, wherein, the discharge flow path comprises: a first flow path extending from the mounting surface toward a surface of the manifold base on a side opposite to the mounting surface, having a first end opening on the mounting surface, and a second end on a side opposite to the first end, and a second flow path connected to the second end of the first flow path and extending in a direction intersecting the extension direction of the first flow path, the axial direction of the peripheral wall coincides with the extension direction of the first flow path, and at least the portion of the peripheral wall where the discharge opening is formed protrudes from the first flow path to the second flow path, the discharge opening is connected to the second flow path in a state where the axial direction of the discharge opening coincides with the extension direction of the second flow path. The solenoid valve manifold as recited in claim 6, wherein, the valve core has a back side on the side opposite to the valve seat, the valve housing has a breathing hole, and the breathing hole discharges the fluid between the back side of the valve core and the valve housing to the discharge flow path. As described in claim 6, the solenoid valve manifold, wherein, the valve housing and the valve body of the solenoid valve are separate components, the valve housing has a flange portion clamped by the valve body and the manifold base. In the solenoid valve manifold as recited in any one of claim items 6 to 9, the valve core has a back surface on the side opposite to the valve seat, and the back surface has a leakage detection groove in a portion of the portion overlapping with the valve seat in the moving direction of the valve core.

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