JP2018168910A - Multi-way valve and valve gear - Google Patents

Abstract

To provide a multi-way valve capable of reducing pressure loss of fluid.SOLUTION: A multi-way valve includes a cylindrical member defining a valve chamber, a first valve seat, a second valve seat, a valve body, and a first pipe connected to a side part of the cylindrical member. The valve body can move between a first position of contacting with the first valve and a second position of contacting with the second valve. Also, the valve body includes a distal surface on the first valve seat side, and a proximal surface on the second valve seat side. When the valve body is at the first position, the proximal surface is at a position of evacuating to the first valve seat side with respect to a central axis of the first pipe. When the valve body is at the second position, the distal surface is at a position of evacuating to the second valve seat side with respect to the central axis of the first pipe.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a multi-way valve and a valve device.

  As a configuration related to a multi-way valve such as a three-way valve, a four-way valve, a six-way valve, etc., for example, in Patent Document 1, two valves arranged in series with a shaft and a total of four valves are separated from each other in the axial direction. A poppet valve mechanism having a valve seat is disclosed.

  Patent Document 2 discloses a valve assembly including a valve body having a valve hole and a valve member. The valve member is movable between the first locking position and the second locking position in the valve hole. The valve member includes a first valve element and a second valve element. When the valve member is in the first locking position, the first valve element abuts on the first valve seat surface and the second valve element abuts on the second valve seat surface. When the valve member is in the second locking position, the first valve element contacts the third valve seat surface, and at the same time, the second valve element contacts the fourth valve seat surface.

Japanese Utility Model Publication No. 52-35541 Japanese Patent No. 5624789

In any of the structures disclosed in Patent Documents 1 and 2, since the main flow of the fluid introduced into the valve chamber collides with the valve body (valve, valve element), the fluid pressure loss is large.
In Patent Documents 1 and 2, the shaft is supported on both sides of the valve body. For this reason, regardless of the position of the valve body, the fluid introduced into the valve chamber collides with the shaft, and the pressure loss of the fluid is large.

  Therefore, an object of the present invention is to provide a multi-way valve and a valve device that can reduce the pressure loss of fluid.

  In order to achieve the above object, a multi-way valve according to the present invention includes a tubular member that defines a valve chamber, a first valve seat disposed at a first end of the tubular member, and a first member of the tubular member. Between a second valve seat disposed at two ends, a first position disposed in the tubular member and contacting the first valve seat, and a second position contacting the second valve seat. A movable valve body; and a first pipe connected to a side portion of the cylindrical member. The valve body includes a distal surface on the first valve seat side and a proximal surface on the second valve seat side. When the valve body is in the first position, the proximal surface is in a position retracted closer to the first valve seat than the center axis of the first pipe. When the valve body is in the second position, the distal surface is in a position retracted closer to the second valve seat than the central axis of the first pipe.

  The multi-way valve in some embodiments may further include a drive shaft that drives the valve body. The valve body may be connected to a first end portion of the drive shaft. The drive shaft may be supported only on the proximal side of the distal surface of the valve body.

  The multi-way valve in some embodiments may further include a guide portion that slidably guides the valve body or the drive shaft.

  The multi-way valve in some embodiments may further include a piston connected to the second end of the drive shaft, and a cylinder that slidably guides the piston.

  The multi-way valve in some embodiments may further comprise a spring receiver and a spring disposed between the piston and the spring receiver. The spring receiver may include the guide portion. The guide portion may guide the drive shaft in a slidable manner.

  In the multi-way valve in some embodiments, the side wall of the cylindrical member may include the guide portion. The guide portion may guide the valve body slidably.

  The multi-way valve in some embodiments may further include a second pipe, a third pipe, the first pipe, the second pipe, and a manifold connected to the third pipe. . The cylindrical member may be disposed in the manifold. Moreover, the said cylindrical member may be arrange | positioned between the said 2nd pipe and the said 3rd pipe.

  A valve device according to the present invention includes a plurality of multi-way valves described in any of the above paragraphs.

  The present invention can provide a multi-way valve and a valve device that can reduce the pressure loss of fluid.

FIG. 1 is a schematic longitudinal sectional view of a multi-way valve in the first embodiment. FIG. 2 is a schematic longitudinal sectional view of the multi-way valve in the first embodiment. FIG. 3 is a schematic diagram for explaining the proximal surface of the valve body and the distal surface of the valve body. FIG. 4 is a schematic longitudinal sectional view of a multi-way valve in the second embodiment. FIG. 5 is a schematic longitudinal sectional view of the multi-way valve in the second embodiment. FIG. 6 is a schematic diagram for explaining the pilot solenoid valve. FIG. 7 is a schematic longitudinal sectional view of a multi-way valve in the third embodiment. FIG. 8 is a schematic longitudinal sectional view of a multi-way valve in the third embodiment. FIG. 9 is a schematic longitudinal sectional view of the valve device according to the fourth embodiment. FIG. 10 is a schematic longitudinal sectional view of the valve device in the fifth embodiment.

  Hereinafter, a multi-way valve and a valve device according to an embodiment will be described with reference to the drawings. In the following description of the embodiments, portions and members having the same function are denoted by the same reference numerals, and repeated descriptions of the portions and members having the same reference numerals are omitted.

(Definition of direction)
In the present specification, the direction in which the valve body 4 faces the first valve seat 22 is defined as the “+ Z” direction, and the direction in which the valve body 4 faces the second valve seat 24 is defined as the “−Z” direction. In the present specification, the + Z direction may be referred to as a distal direction, and the -Z direction may be referred to as a proximal direction.

(First embodiment)
With reference to FIG. 1 and FIG. 2, 1 A of multiway valves in 1st Embodiment are demonstrated. 1 and 2 are schematic longitudinal sectional views of a multi-way valve 1A according to the first embodiment. FIG. 3 is a schematic diagram for explaining the proximal surface B4 of the valve body 4 and the distal surface B2 of the valve body. 1 shows a state where the valve body 4 is in the first position, and FIG. 2 shows a state where the valve body 4 is in the second position.

  The multi-way valve 1A in the first embodiment is a three-way valve. The multi-way valve 1A includes a cylindrical member 2 that defines the valve chamber SP, a first valve seat 22, a second valve seat 24, a valve body 4, and side portions of the cylindrical member 2 (in other words, a side wall 25). And a first pipe 90 connected to the first pipe 90.

  The tubular member 2 has a side wall 25, a first end portion 20a, and a second end portion 20b, and has a tubular shape (more specifically, a cylindrical shape) as a whole. A first opening 21 a is formed at the first end 20 a of the cylindrical member 2, and a second opening 21 b is formed at the second end 20 b of the cylindrical member 2. In the example illustrated in FIG. 1, the tubular member 2 includes a first member 2-1 having a tubular shape and a second member 2-2 having a ring shape, and the first member 2-1 The second member 2-2 is fixed to each other. Alternatively, the cylindrical member 2 may be constituted by a single member or a combination of three or more members. The material of the cylindrical member 2 is, for example, a metal such as stainless steel.

  The first valve seat 22 is disposed at the first end 20 a of the tubular member 2. When the first valve seat 22 and the valve body 4 are in contact with each other, the first opening 21 a is closed by the valve body 4. At this time, the inside of the valve chamber SP communicates with the outside of the valve chamber SP through the second opening 21b. Therefore, the fluid introduced from the first pipe 90 is discharged from the second opening 21b through the valve chamber SP. Alternatively, the fluid introduced from the second opening 21b may be supplied to the first pipe 90 through the valve chamber SP.

  The second valve seat 24 is disposed at the second end 20 b of the tubular member 2. When the second valve seat 24 and the valve body 4 are in contact with each other, the second opening 21 b is closed by the valve body 4. At this time, the inside of the valve chamber SP communicates with the outside of the valve chamber SP via the first opening 21a. Therefore, the fluid introduced from the first pipe 90 is discharged from the first opening 21a through the valve chamber SP. Alternatively, the fluid introduced from the first opening 21a may be supplied to the first pipe 90 through the valve chamber SP.

  The valve chamber SP is a space in the cylindrical member 2, which is located in a proximal direction with respect to the first valve seat 22 and located in a distal direction with respect to the second valve seat 24. In the example illustrated in FIG. 1, the valve chamber SP and the flow path in the first pipe 90 are always in communication.

  The valve body 4 is disposed in the tubular member 2 (in other words, in the valve chamber SP), and is movable in the valve chamber SP. More specifically, the valve body 4 is movable between a first position in contact with the first valve seat 22 and a second position in contact with the second valve seat 24. The movement of the valve body 4 is performed, for example, by applying a force to the drive shaft 5 connected to the valve body 4.

  The valve body 4 includes a first surface 42 that can contact the first valve seat 22 and a second surface 44 that can contact the second valve seat 24. In addition, the material of the part which contacts the valve seat (22, 24) among the valve bodies 4 is resin, for example.

  Referring to FIG. 3, the first surface 42 means a surface that can contact the first valve seat 22 (that is, the contact surface B <b> 1). The distal surface B2 is a surface located on the distal side of the valve body 4. The distal surface B2 is a surface located on the distal side of the valve body 4, and may mean a surface surrounded by the contact surface B1. In the example described in FIG. 3, the distal surface B2 has a substantially circular shape.

  The 2nd surface 44 means the surface (namely, contact surface B3) which can contact the 2nd valve seat 24. FIG. The proximal surface B4 is a surface located on the proximal side of the valve body 4. The proximal surface B4 is a surface located on the proximal side of the valve body 4, and may mean a surface surrounded by the contact surface B3. In the example described in FIG. 3, the proximal surface B4 has a substantially ring shape.

  In the first embodiment, when the valve body 4 is in the first position (position shown in FIG. 1), the proximal surface B4 is retracted closer to the first valve seat 22 than the central axis AX of the first pipe 90. In the position. In other words, when the valve body 4 is in the first position, the distance L1 between the proximal surface B4 and the first valve seat 22 is between the central axis AX of the first pipe 90 and the first valve seat 22. Shorter than the distance L2. For this reason, the main flow of the fluid introduced from the first pipe 90 (the portion having the fastest flow velocity through the center of the flow path) is prevented from colliding with the valve body 4. As a result, it is possible to reduce the pressure loss of the fluid from the first pipe 90 toward the second opening 21b.

  In the first embodiment, when the valve body 4 is in the second position (the position shown in FIG. 2), the distal surface B2 is closer to the second valve seat 24 than the central axis AX of the first pipe 90. In the retracted position. In other words, when the valve body 4 is in the second position, the distance L3 between the distal surface B2 and the second valve seat 24 is between the central axis AX of the first pipe 90 and the second valve seat 24. Shorter than the distance L4. For this reason, the main flow of the fluid introduced from the first pipe 90 (the portion having the fastest flow velocity through the center of the flow path) is prevented from colliding with the valve body 4. As a result, it is possible to reduce the pressure loss of the fluid from the first pipe 90 toward the first opening 21a.

  From the viewpoint of reducing the pressure loss of the fluid, it is preferable to prevent the flow flowing near the center of the flow path from colliding with the valve body 4 in addition to the flow passing through the center of the flow path. From this viewpoint, the exit cross section of the first pipe 90 is divided into three equal parts (the cross sectional area is divided into three equal parts) by the first virtual surface V1 and the second virtual surface V2 perpendicular to the drive shaft 5. Then, if the fluid introduced into the valve chamber SP through the central section of the outlet section divided into three equal parts does not collide with the valve body 4, the pressure loss of the fluid is further reduced. Therefore, when the valve body 4 is in the first position (the position shown in FIG. 1), the proximal surface B4 is preferably in a position retracted closer to the first valve seat 22 than the first virtual surface V1. In addition, when the valve body 4 is in the second position (position shown in FIG. 2), the distal surface B2 is preferably in a position retracted to the second valve seat 24 side than the second virtual surface V2. The first virtual surface V1 is a virtual surface closer to the first valve seat 22 than the second virtual surface V2.

(Support for drive shaft)
In the first embodiment, the multi-way valve 1A includes a drive shaft 5 that drives the valve body 4. The valve body 4 is connected to the first end 5a of the drive shaft 5, and the drive shaft 5 is a valve. It may be supported only on the proximal side of the distal surface B2 of the body 4 (Configuration Example 1).

  In the example illustrated in FIG. 1, the second end portion 5 b of the drive shaft 5 is supported by the support member 3. The support member 3 may be a piston that moves in the cylinder, or may be another member.

  In the configuration example 1, the drive shaft 5 is supported only on the proximal side of the distal surface B2 of the valve body 4. For this reason, in the state shown in FIG. 2, the fluid flowing through the valve chamber SP does not interfere with the drive shaft 5. As a result, the pressure loss of the fluid is reduced. Further, in the case where the drive shaft 5 is supported only on the proximal side of the distal surface B2 of the valve body 4, the number of parts is reduced compared to the case where the drive shaft 5 is supported on both sides of the valve body 4. Reduction and weight reduction are possible.

(Second Embodiment)
With reference to FIG. 4 thru | or FIG. 6, the multi-way valve 1B in 2nd Embodiment is demonstrated. 4 and 5 are schematic longitudinal sectional views of the multi-way valve 1B in the second embodiment. FIG. 6 is a schematic diagram for explaining the pilot solenoid valve 8. 4 shows a state in which the valve body 4 is in the first position, and FIG. 5 shows a state in which the valve body 4 is in the second position.

  The cylindrical member 2, the first valve seat 22, the second valve seat 24, the valve body 4, the first pipe 90, and the drive shaft 5 of the multi-way valve 1B in the second embodiment are multi-way in the first embodiment. This is the same as the tubular member 2, the first valve seat 22, the second valve seat 24, the valve body 4, the first pipe 90, and the drive shaft 5 of the valve 1 </ b> A. Therefore, in 2nd Embodiment, it demonstrates centering around structures other than the cylindrical member 2, the 1st valve seat 22, the 2nd valve seat 24, the valve body 4, the 1st pipe 90, and the drive shaft 5, The repeated description of the shaped member 2, the first valve seat 22, the second valve seat 24, the valve body 4, the first pipe 90, and the drive shaft 5 is omitted.

  The multi-way valve 1B in the second embodiment includes a piston 50 connected to the second end 5b of the drive shaft 5 and a cylinder 52 that guides the piston slidably. In the example illustrated in FIG. 4, the piston 50 and the O-ring 51 as a seal member attached to the piston 50 function as the support member 3 that supports the second end portion 5 b of the drive shaft 5.

  In the example illustrated in FIG. 4, the piston 50 can be moved in the + Z direction by introducing a high-pressure fluid into the cylinder chamber C of the cylinder 52. When the piston 50 moves in the + Z direction, the drive shaft 5 connected to the piston 50 and the valve body 4 connected to the drive shaft 5 move in the + Z direction. Thus, the valve body 4 can be seated on the first valve seat 22. On the other hand, when the pressure in the cylinder chamber C is lowered, the piston 50 moves in the −Z direction by the force of the spring 60. When the piston 50 moves in the −Z direction, the drive shaft 5 connected to the piston 50 and the valve body 4 connected to the drive shaft 5 move in the −Z direction. Thus, the valve body 4 can be seated on the second valve seat 24.

(Guide part)
In the second embodiment, the multi-way valve 1B includes a guide portion 6 that guides the drive shaft 5 in a slidable manner. In the second embodiment, the spring receiver 62 functions as the guide portion 6 (in other words, the spring receiver 62 includes the guide portion 6).

  In the example described in FIG. 4, the spring receiver 62 is disposed on the distal side of the cylinder 52. A spring 60 is disposed between the spring receiver 62 and the piston 50. The spring 60 is a compression spring and biases the piston 50 toward the proximal direction (−Z direction). When the multi-way valve 1B does not include the spring 60, it is necessary to drive the piston only by the differential pressure between the fluid pressure acting on the distal surface of the piston 50 and the fluid pressure acting on the proximal surface of the piston 50. On the other hand, when the multi-way valve 1B includes the spring 60, the piston 50 and the valve body 4 are returned to the home position (position on the −Z direction side) without strictly controlling the differential pressure of the fluid pressure. Is possible. As a result, the fluid pressure control algorithm is simplified, and the mechanism for reducing the pressure in the cylinder chamber C is simplified.

  In addition, the spring receiver 62 is made of metal (more specifically, for example, brass), and also functions as a guide portion 6 that guides the drive shaft 5 slidably. In the example shown in FIG. 4, the distal end portion 62 a of the spring receiver 62 is the guide portion 6 and contacts the drive shaft 5. Since the proximal end portion (second end portion 5 b) of the drive shaft 5 is supported by the support member 3 such as the piston 50 and the intermediate portion of the drive shaft 5 is supported by the spring receiver 62, the drive shaft 5. Can be made to coincide with the longitudinal center axis of the cylindrical member 2 (the drive shaft 5 is centered). As a result, the valve body 4 can be reliably seated on the valve seat (22, 24).

  That is, the spring receiver 62 in the second embodiment has two different functions: a function of supporting the spring 60 and a function of guiding the drive shaft 5.

  As described above, in the second embodiment, since the spring receiver 62 has a function of guiding the drive shaft 5, it is not necessary to provide a dedicated guide member for guiding the drive shaft 5. For this reason, the number of parts of the multi-way valve 1B is reduced.

  In the example illustrated in FIG. 4, the proximal end portion 62 b of the spring receiver 62 includes a flange portion, and the flange portion is supported by the inward flange of the lid member 95. However, the support mechanism of the spring receiver 62 is not limited to the example shown in FIG.

(Manifold)
In the second embodiment, the multi-way valve 1B may include a manifold 9 to which a first pipe 90, a second pipe 91, and a third pipe 92 are connected. In the example illustrated in FIG. 4, the manifold 9 as a whole has a cylindrical shape (more specifically, a cylindrical shape).

  Advantages when the cylindrical member 2 and the manifold 9 are prepared as separate bodies will be described. When the first pipe 90, the second pipe 91, and the third pipe 92 are connected to the manifold 9 (for example, when connected by welding or the like), the manifold 9 is deformed by heat or stress acting on the manifold 9. For this reason, if the valve seat is provided directly on the inner surface of the manifold 9, the valve seat may be distorted. Although it is conceivable to increase the wall thickness of the manifold 9, increasing the wall thickness increases the weight. Therefore, in the example shown in FIG. 4, the valve chamber SP and the valve seats (22, 24) that require high dimensional accuracy are configured by the cylindrical member 2, and the cylindrical member 2 is attached to the manifold 9. Note that the attachment of the tubular member 2 to the manifold 9 may be attachment by brazing. In the example shown in FIG. 4, the cylindrical member 2 is brazed to the manifold 9 at a portion indicated by an arrow D.

  In the example illustrated in FIG. 4, the cylindrical member 2 is disposed between the second pipe 91 and the third pipe 92. Further, the first end (first opening) of the manifold 9 is closed by the first lid member 94, and the second end (second opening) of the manifold 9 is closed by the second lid member 95. Has been. When the manifold 9 includes two lid members (94, 95), a part of the moving member constituted by the valve body 4, the drive shaft 5 and the like is inserted from the first opening, A part can be inserted from the second opening. For this reason, in the manifold 9, the operation | work which assembles a moving member (for example, operation | work which connects the valve body 4 and the drive shaft 5) can be performed easily.

  A distal fluid chamber Sa is formed between the first lid member 94 and the cylindrical member 2, and a proximal side is formed between the second lid member 95 and the cylindrical member 2. The fluid chamber Sb is formed. The fluid chamber Sa and the flow path in the third pipe 92 are always in communication, and the fluid chamber Sb and the flow path in the second pipe 91 are always in communication.

(Pilot solenoid valve)
An example of the operation of the pilot solenoid valve 8 will be described with reference to FIGS. In the example shown in FIG. 4, the inside of the cylinder chamber C has a higher pressure than the region on the distal side of the piston 50. In this case, the cylinder chamber C needs to be supplied with a high-pressure fluid via the pipe 82. For example, in the example shown in FIG. 6, the high pressure fluid is supplied to the pipe 82 by moving the valve body 80 of the pilot electromagnetic valve 8 to connect the pipe 82 and the high pressure pipe 84. In the example shown in FIG. 5, the cylinder chamber C has a relatively low pressure. In this case, the fluid is discharged from the cylinder chamber C through the pipe 82. For example, in the example shown in FIG. 6, the fluid in the pipe 82 is guided toward the low-pressure pipe 86 by moving the valve body 80 of the pilot electromagnetic valve 8 to connect the pipe 82 and the low-pressure pipe 86. The

  The configuration of the pilot solenoid valve 8 is not limited to the examples described in FIGS. 4 to 6 and is arbitrary. In the second embodiment, an example in which the drive shaft 5 is driven by an actuator (piston) that is operated by fluid pressure has been described. Alternatively, the drive shaft 5 may be driven by an electric actuator. In this case, in the above description, the piston is read as an output member (for example, an output rod) of the electric actuator.

  The second embodiment has the same effects as the first embodiment. In addition, in the second embodiment, the spring receiver 62 has a function of guiding the drive shaft 5. For this reason, the drive shaft 5 is effectively centered.

  In the second embodiment, an example in which the multi-way valve 1B is a three-way valve has been described. Alternatively, the multi-way valve 1B may be an N-way valve (N is an integer of 4 or more). In this case, two or more valve chambers SP may be arranged in the manifold 9.

(Third embodiment)
With reference to FIG. 7 and FIG. 8, the multi-way valve 1C in the third embodiment will be described. 7 and 8 are schematic longitudinal sectional views of the multi-way valve 1C in the third embodiment. 7 shows a state where the valve body 4 is in the first position, and FIG. 8 shows a state where the valve body 4 is in the second position.

  The multi-way valve 1C in the third embodiment and the multi-way valve 1B in the second embodiment differ in the specific configuration of the guide portion. In other respects, the multi-way valve 1C in the third embodiment is the same as the multi-way valve 1B in the second embodiment. Therefore, in the third embodiment, a specific configuration of the guide portion 6C will be described, and repeated description of other configurations will be omitted.

  In the multi-way valve 1C in the third embodiment, the side wall 25 of the cylindrical member 2 (more specifically, the inner surface of the side wall 25) functions as a guide portion 6C that guides the valve body 4 slidably. In other words, the side wall 25 of the cylindrical member 2 includes the guide portion 6C.

  In the example described in FIG. 7, the valve body 4 includes a protruding portion 46 that protrudes in the radially outward direction of the valve body 4. And the protrusion part 46 contacts 6 C of guide parts, and the protrusion part 46 slides with respect to 6 C of guide parts. Even if the material of the protrusion part 46 is a different material from the part (for example, part which comprises the contact surface B1 and contact surface B3 in FIG. 3) which contacts the valve seat (22, 24) among the valve bodies 4. Good. The material of the protruding portion 46 is, for example, brass, and hard plating (sliding plating) finished to a smooth surface may be applied to the brass surface.

  In the example shown in FIG. 7, the protruding portion 46 has a function of holding the resin portion 47 so that the resin portion 47 in contact with the valve seat in the valve body 4 does not fall off from the valve body 4. Also good. In this case, the protruding portion 46 has two different functions: a function of centering the valve body 4 by contacting the guide portion 6C, and a function of holding a portion (resin portion 47) of the valve body 4 that contacts the valve seat. It will have.

  When the protrusion 46 moves in the + Z direction or the −Z direction, the protrusion 46 may be caught on the edge 26 a of the hole 26 provided in the side wall 25. Therefore, it is preferable that the proximal end portion of the protruding portion 46 has a tapered surface or a curved surface whose distance from the side wall 25 increases in the proximal direction. Similarly, it is preferable that the distal end portion of the protrusion 46 has a tapered surface or a curved surface whose distance from the side wall 25 increases in the distal direction.

  The third embodiment has the same effects as the first embodiment. In addition, in 3rd Embodiment, the cylindrical member 2 functions as the guide part 6C which guides the valve body 4 slidably. For this reason, in the third embodiment, it is possible to effectively center the valve body 4 without increasing the number of parts.

  In the example shown in FIG. 7, the valve body 4 connected to the drive shaft 5 is guided by the guide portion 6 </ b> C, and the piston 50 connected to the drive shaft 5 is guided by the cylinder 52. For this reason, the longitudinal central axis of the drive shaft 5 does not deviate from the longitudinal central axis of the tubular member 2, and the drive shaft 5 is inclined with respect to the piston 50, the drive shaft 5, and the valve body 4. The generated force does not act. Therefore, the risk of failure of the piston 50, the drive shaft 5, and the valve body 4 is reduced. Further, in the multi-way valve 1C in the third embodiment, since the configurations of the spring 60 and the spring receiver 62 are omitted, the weight is reduced compared to the multi-way valve 1B in the second embodiment. In addition, in the multi-way valve 1C in the third embodiment, the configuration of the spring 60 and the spring receiver 62 may be additionally employed.

  In the third embodiment, an example in which the multi-way valve 1C is a three-way valve has been described. Alternatively, the multi-way valve 1C may be an N-way valve (N is an integer of 4 or more). In this case, two or more valve chambers SP may be arranged in the manifold 9.

(Fourth embodiment)
With reference to FIG. 9, the valve apparatus 1D in the fourth embodiment will be described. FIG. 9 is a schematic longitudinal sectional view of a valve device 1D according to the fourth embodiment.

  The valve device 1D in the fourth embodiment is a four-way valve formed by combining two multi-way valves (more specifically, three-way valves). In other words, the valve device 1D includes a multi-way valve 1B and a multi-way valve 1B '. The multi-way valve 1B is the same as the multi-way valve 1B in the second embodiment. For this reason, the repeated description about the multi-way valve 1B is omitted.

  The multi-way valve 1B 'is different from the multi-way valve 1B in that it includes a fourth pipe 97 and a fifth pipe 98. In other respects, the multi-way valve 1B 'is the same as the multi-way valve 1B. Therefore, repetitive description of the configuration other than the fourth pipe 97 and the fifth pipe 98 is omitted.

  In the example illustrated in FIG. 9, the fourth pipe 97 and the second pipe 91 are disposed on the proximal side of the cylindrical member 2 and connected to the manifold 9. The flow path in the fourth pipe 97 is always in communication with the flow path in the second pipe 91. Further, the fifth pipe 98 and the third pipe 92 are disposed on the distal side of the cylindrical member 2 and are connected to the manifold 9. The flow path in the fifth pipe 98 is always in communication with the flow path in the third pipe 92.

  In the example illustrated in FIG. 9, the multi-way valve 1 </ b> B and the multi-way valve 1 </ b> B ′ are connected via a second pipe 91. In other words, the second pipe 91 of the multi-way valve 1B and the second pipe 91 of the multi-way valve 1B 'are the same member (common member). Further, the multi-way valve 1B and the multi-way valve 1B ′ are connected via a third pipe 92. In other words, the third pipe 92 of the multi-way valve 1B and the third pipe 92 of the multi-way valve 1B 'are the same member (common member).

  In the example shown in FIG. 9, the valve body 4 of the multi-way valve 1B is in the first position, and the valve body 4 of the multi-way valve 1B 'is in the second position. For this reason, the flow path in the first pipe 90 of the multi-way valve 1B and the flow path in the fourth pipe 97 of the multi-way valve 1B 'communicate with each other. In other words, the fluid introduced from the first pipe 90 of the multi-way valve 1B is supplied to the fourth pipe 97 of the multi-way valve 1B ′ (or the fluid introduced from the fourth pipe 97 of the multi-way valve 1B ′ is , Supplied to the first pipe 90 of the multi-way valve 1B). Further, the flow path in the first pipe 90 of the multi-way valve 1B 'and the flow path in the fifth pipe 98 of the multi-way valve 1B' communicate with each other. In other words, the fluid introduced from the first pipe 90 of the multi-way valve 1B ′ is supplied to the fifth pipe 98 of the multi-way valve 1B ′ (or the fluid introduced from the fifth pipe 98 of the multi-way valve 1B ′. Is supplied to the first pipe 90 of the multi-way valve 1B ′).

  The fourth embodiment has the same effect as the second embodiment. In addition, in the valve device 1D of the fourth embodiment, a four-way valve or the like can be easily formed by combining two multi-way valves (for example, three-way valves). In particular, in the example shown in FIG. 9, the multi-way valve 1 </ b> B and the multi-way valve 1 </ b> B ′ are the same except that the multi-way valve 1 </ b> B ′ includes the fourth pipe 97 and the fifth pipe 98. Therefore, the parts of the multi-way valve 1B and the parts of the multi-way valve 1B 'can be shared. As a result, the manufacturing cost of a four-way valve or the like is reduced. The valve device 1D (four-way valve or the like) in the fourth embodiment can be used for a flow path switching valve or the like in an air conditioner.

(Fifth embodiment)
With reference to FIG. 10, the valve apparatus 1E in 5th Embodiment is demonstrated. FIG. 10 is a schematic longitudinal sectional view of the valve device 1E according to the fifth embodiment.

  The valve device 1E in the fifth embodiment is a four-way valve formed by combining two multi-way valves (more specifically, three-way valves). In other words, the valve device 1E includes a multi-way valve 1C and a multi-way valve 1C '. The multi-way valve 1C is the same as the multi-way valve 1C in the third embodiment. For this reason, the repeated description about the multi-way valve 1C is omitted.

  The multi-way valve 1C ′ is different from the multi-way valve 1C in that it includes a fourth pipe 97 and a fifth pipe 98. In other respects, the multi-way valve 1C 'is the same as the multi-way valve 1C. Therefore, repetitive description of the configuration other than the fourth pipe 97 and the fifth pipe 98 is omitted.

  In the example illustrated in FIG. 10, the fourth pipe 97 and the second pipe 91 are disposed on the proximal side of the cylindrical member 2 and connected to the manifold 9. The flow path in the fourth pipe 97 is always in communication with the flow path in the second pipe 91. Further, the fifth pipe 98 and the third pipe 92 are disposed on the distal side of the cylindrical member 2 and are connected to the manifold 9. The flow path in the fifth pipe 98 is always in communication with the flow path in the third pipe 92.

  In the example illustrated in FIG. 10, the multi-way valve 1 </ b> C and the multi-way valve 1 </ b> C ′ are connected via a second pipe 91. In other words, the second pipe 91 of the multi-way valve 1C and the second pipe 91 of the multi-way valve 1C 'are the same member (common member). The multi-way valve 1 </ b> C and the multi-way valve 1 </ b> C ′ are connected via a third pipe 92. In other words, the third pipe 92 of the multi-way valve 1C and the third pipe 92 of the multi-way valve 1C 'are the same member (common member).

  The fifth embodiment has the same effects as the third embodiment. In addition, in the valve device 1E of the fifth embodiment, a four-way valve or the like can be easily formed by combining two multi-way valves (more specifically, three-way valves). In particular, in the example illustrated in FIG. 10, the multi-way valve 1 </ b> C and the multi-way valve 1 </ b> C ′ are the same except that the multi-way valve 1 </ b> C ′ includes a fourth pipe 97 and a fifth pipe 98. Therefore, the parts of the multi-way valve 1C and the parts of the multi-way valve 1C 'can be shared. As a result, the manufacturing cost of a four-way valve or the like is reduced. The valve device 1E (four-way valve or the like) in the fifth embodiment can be used for a flow path switching valve or the like in an air conditioner.

  In the fifth embodiment, a four-way valve is formed by combining the multi-way valve 1C and the multi-way valve 1C '. Alternatively, a four-way valve may be formed by combining the multi-way valve 1C and the multi-way valve 1B ′ (or a four-way valve may be formed by combining the multi-way valve 1B and the multi-way valve 1C ′. Good). Further alternatively, a six-way valve or the like may be formed by combining three multi-way valves (1A, 1B, 1C).

  In addition, this invention is not limited to the above-mentioned embodiment. Within the scope of the present invention, the above-described embodiments can be freely combined, or any component of each embodiment can be modified, or any component can be omitted in each embodiment.

1A, 1B, 1B ', 1C, 1C': Multi-way valve 1D, 1E: Valve device 2: Tubular member 2-1: First member 2-2: Second member 3: Support member 4: Valve body 5: Drive Shaft 5a: First end portion 5b: Second end portion 6, 6C: Guide portion 8: Pilot electromagnetic valve 9: Manifold 20a: First end portion 20b: Second end portion 21a: First opening 21b: Second opening 22 : 1st valve seat 24: 2nd valve seat 25: Side wall 26: Hole part 26a: Edge 42: 1st surface 44: 2nd surface 46: Protrusion part 47: Resin part 50: Piston 51: O-ring 52: Cylinder 60 : Spring 62: Spring receiver 62a: Distal end part 62b: Proximal end part 80: Valve body 82: Pipe 84: High pressure pipe 86: Low pressure pipe 90: First pipe 91: Second pipe 92: Third pipe 94: First lid member 95: Second lid member 97: 4 pipe 98: 5th pipe B1: contact surface B2: distal surface B3: contact surface B4: proximal surface C: cylinder chamber SP: valve chamber Sa: fluid chamber Sb: fluid chamber V1: first virtual surface V2: first 2 virtual planes

Claims (8)

A tubular member defining the valve chamber;
A first valve seat disposed at a first end of the tubular member;
A second valve seat disposed at a second end of the tubular member;
A valve body disposed in the tubular member and movable between a first position contacting the first valve seat and a second position contacting the second valve seat;
A first pipe connected to a side portion of the cylindrical member;
The valve body includes a distal surface on the first valve seat side and a proximal surface on the second valve seat side,
When the valve body is in the first position, the proximal surface is in a position retracted closer to the first valve seat than the center axis of the first pipe;
When the valve body is in the second position, the distal surface is in a position retracted to the second valve seat side with respect to the central axis of the first pipe. A drive shaft for driving the valve body;
The valve body is connected to a first end of the drive shaft;
The multi-way valve according to claim 1, wherein the drive shaft is supported only on a proximal side of the distal surface of the valve body. The multi-way valve according to claim 2, further comprising a guide unit that slidably guides the valve body or the drive shaft. A piston connected to the second end of the drive shaft;
The multi-way valve according to claim 3, further comprising: a cylinder that slidably guides the piston. A spring receiver,
A spring disposed between the piston and the spring receiver,
The spring receiver includes the guide portion,
The multi-way valve according to claim 4, wherein the guide portion slidably guides the drive shaft. The side wall of the cylindrical member includes the guide portion,
The multi-way valve according to any one of claims 3 to 5, wherein the guide portion guides the valve body slidably. A second pipe;
The third pipe,
A manifold connected to the first pipe, the second pipe, and the third pipe;
The tubular member is disposed in the manifold,
The multi-way valve according to any one of claims 1 to 6, wherein the cylindrical member is disposed between the second pipe and the third pipe. A valve device comprising a plurality of the multi-way valves according to any one of claims 1 to 7.

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