JP2016070490A - Valve motion - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a valve motion capable of softening a metallic sound caused by contact of a valve body with a plunger or a valve element holder.SOLUTION: A valve motion comprises: a plunger movable in a plunger tube 221 along with a valve element 212 for opening and closing a valve port 211f provided in a valve seat 211d; and a valve body 211 at least having an inlet port 211a connected to a first fitting 201, an outlet port 211b connected to a second fitting 202, a valve chamber 211c communicating with the inlet port 211a and the outlet port 211b and containing the valve element 212, and a valve seat 211d contacting with the valve element 212. The valve motion comprises a buffer member 215 that is arranged between the valve body 211 and the plunger and is further arranged at a step portion provided in the valve body 211.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a valve device used for opening and closing a flow path in a system for controlling the flow of fluid.

  A valve device that opens and closes a flow path is used in various applications. An electromagnetic valve is known as one of such valve devices. FIG. 1 shows a main configuration of an electromagnetic valve described in Patent Document 1 as an example of a conventional electromagnetic valve.

  In FIG. 1, an electromagnetic valve 100 is disposed on a valve main body 110, a plunger unit 120 disposed on the valve main body 110, and an outer peripheral portion of the plunger unit 120, and an electromagnetic that excites the attractor 123 and the plunger 122. A coil assembly 130.

  The valve body 110 is connected to the first joint 101 and the second joint 102, and has a valve chamber that movably accommodates the valve body 112 and the plunger 122, and a valve body 111 that contacts the valve body 112. And a spherical valve body 112 that is accommodated in the valve chamber and is held by a valve body holder 125 fixed to the lower end of the plunger 122 and opens and closes the valve seat.

  The plunger unit 120 includes a plunger tube 121 that is a cylindrical member fixed to the upper opening of the valve body 111, a plunger 122 that is a movable iron core that can slide up and down in the plunger tube 121, and the plunger tube 121. A suction element 123 that is a fixed iron core fixed to the upper end, a coil spring 124 that is disposed between the plunger 122 and the suction element 123 and is retracted in a direction to close the valve body 112, and a lower end of the plunger 122 A valve body holder 125 that holds the valve body 112 inside, and a valve spring 126 that is disposed between the plunger 122 and the valve body 112 and biases the valve body 112 in the valve closing direction.

  The electromagnetic coil assembly 130 includes a resin bobbin 131 concentrically attached to the plunger tube 121, a coil 132 wound around the bobbin 131 and exciting the plunger 122 and the attractor 123, and a lead wire connected to the coil 132. 133 and the bobbin 131 around which the coil 132 is wound are covered with a resin, the bobbin 131 covered with the resin and the coil 132 are accommodated inside, and a bolt for fixing the casing 134 to the attractor 123 135.

JP 2003-301962 A JP 2000-170945 A Japanese Utility Model Publication No. 63-89477

  Such a conventional solenoid valve 100 described in Patent Document 1 includes a valve body holder 125, a valve spring 126, and a valve body 112 at the lower end of a plunger 122, and a high differential pressure acts on the valve body 112. This is a configuration of a high-pressure compatible solenoid valve. For this reason, the impact of the valve body 112 and the valve seat is reduced by the two-stage contact between the valve body 112 and the valve body holder 125. For this reason, in the solenoid valve 100, when the plunger 122 moves in the valve closing direction, the valve body holder 125 formed of the metal material and the valve chamber bottom portion of the valve body 111 formed of the metal material similarly come into contact with each other. As a result, a metallic sound is generated, which is a problem.

  In Patent Literature 2, one end portion is inserted into and contacted with a convex portion provided on the plunger, and the other end portion is inserted into an annular concave portion provided in the electromagnetic valve body. There is disclosed a solenoid valve that includes a buffering spring that abuts against and can suppress an impact sound during operation. However, in Patent Document 2, the valve body and the valve seat are sealed with each other, the pressure receiving area of the valve body and the valve seat is increased, and the coil is enlarged to obtain a stronger suction force, or the pressure receiving pressure is increased. There is a problem that the area must be reduced. In addition, since the buffer spring is provided around the valve body, there is a problem that the buffer spring may interfere with the flow path, or the bite into the valve portion may be a concern.

  Patent Literature 3 includes a resilient ring attached to an end surface of the plunger on the fixed iron core side and a nozzle damper that is an elastic body attached around the resilient valve body of the flange surface of the plunger, and collides with a plunger that operates at high speed. An electromagnetic valve that absorbs the impact of time and operates with low noise is disclosed. However, in Patent Document 3, an elastic body is attached to the plunger, which obstructs the flow path when the valve is opened, resulting in a problem that the flow rate is reduced. Moreover, since the elastic body is affixed to the plunger that operates at high speed, there is also a problem that the elastic body may be peeled off during operation. Furthermore, Patent Document 3 has a problem that the flow path becomes complicated due to the provision of the nozzle damper on the flange surface of the plunger, and the fluid becomes turbulent. Moreover, in order to ensure the flow rate which passes a valve opening, it is necessary to set the movement distance of a plunger long, For this reason, there also exists a problem that the attraction | suction force only to move a plunger long distance is needed.

  The object of the present invention is to solve the problems of the conventional mounting method of the buffer member that suppresses the impact noise during operation and the problem of reducing the flow rate of the valve when the buffer member is mounted. It is an object of the present invention to provide a valve device that can alleviate a metal sound generated by contact with a holder.

  In order to solve the above-described problems, the valve device of the present invention is connected to a plunger that can move together with a valve body in a plunger tube and a first joint in order to open and close a valve port provided in a valve seat. An inlet port; an outlet port connected to the second joint; a valve chamber that communicates with the inlet port and the outlet port and accommodates the valve body; and at least the valve seat that contacts the valve body. A valve device including a valve main body, wherein the valve device is further provided with a buffer member disposed between the valve main body and the plunger, and further disposed in a step portion provided in the valve main body.

  Further, the buffer member may have an annular shape.

  Moreover, the step part provided in the said valve main body is formed around the said valve seat of the bottom face of the said valve chamber, and the said buffer member is good also as what is arrange | positioned at the said step part.

  In addition, in order to fix from the surface of the valve body opening side of the buffer member, a cylindrical member disposed around the valve body inside the valve chamber and fixed to the valve body may be provided. Good.

  Further, the cylindrical member may be press-fitted and fixed to the valve body.

  The cylindrical member may be fixed to the valve body by welding.

  Moreover, the said cylindrical member shall be provided with the fixing member with a slit by which the slit was formed in a part of ring shape, and the spacer provided in the bottom face side of the said valve chamber of the said fixing member with a slit.

  The cylindrical member is disposed around the valve body inside the valve chamber, and a cylindrical filter in which a bottom surface side surface of the valve chamber is in contact with the buffer member, the buffer member, and the above In order to fix the cylindrical filter, a ring-shaped fixing member that supports a surface of the cylindrical filter on the valve body opening side and is fixed to the valve body may be provided.

  Moreover, the contact surface with the said plunger in the said buffer member arrange | positioned at the said step part is good also as the said valve seat and a thing without a level | step difference and being flush | level.

  The buffer member has a step portion provided on the outer peripheral portion of the contact surface with the plunger, and the surface of the tubular member on the bottom surface side of the valve chamber is the plunger contact surface of the buffer member. It is good also as what contacts the step part of the outer peripheral part of a surface, and the said cylindrical member aligns.

  The plunger is fixed to the bottom surface side of the valve chamber, and is disposed in the valve body holder that holds a spherical valve body therein, and biases the valve body in the valve closing direction. And a valve spring.

  The valve device may be an electromagnetic valve.

  According to the valve device of the present embodiment, the metal sound generated by the contact between the valve main body and the plunger or the valve body holder can be reduced by providing the buffer member on the contact surface. Further, the valve seat and the valve body can be made of metal, and durability and operability against valve leakage can be maintained. Further, since the cylindrical filter is disposed on the buffer member provided at the bottom of the valve chamber and further fixed by the ring-shaped fixing member, the buffer member can be fixed by a method with a small number of manufacturing steps. At the same time, problems such as the buffer member blocking the flow path and the buffer member biting into the valve seat can be solved.

It is sectional drawing which shows the solenoid valve which is an example of the valve apparatus by a prior art. It is sectional drawing of the solenoid valve which is 1st Embodiment of the valve apparatus which concerns on this invention. It is sectional drawing which expands and shows the valve main-body vicinity of the solenoid valve shown by FIG. It is an assembly drawing of the principal part near the valve main-body part of the solenoid valve which is 2nd Embodiment of the valve apparatus which concerns on this invention. It is sectional drawing which shows the principal part of the vicinity of the valve main-body part of the solenoid valve shown by FIG. It is an assembly figure of the principal part near the valve main-body part of the solenoid valve which is 3rd Embodiment of the valve apparatus which concerns on this invention. FIG. 7A is a cross-sectional view showing a main part near the valve main body of the electromagnetic valve shown in FIG. 6, a cross-sectional view of a main part near the valve main body, and FIG. It is an enlarged view near the step part of the buffer member shown to VIIB of 7 (a). FIG. 8A is an enlarged cross-sectional view showing the vicinity of the valve main body of the solenoid valve that is the fourth embodiment of the valve device according to the present invention, and is an enlarged view of the vicinity of the valve main body. (B) is an enlarged view of the vicinity of the buffer member shown in VIIIB of FIG. It is sectional drawing which expands and shows the valve body part vicinity of the solenoid valve which is 5th Embodiment of the valve apparatus which concerns on this invention. FIG. 10A is a further enlarged view of the welded portion of FIG. 9 welded and fixed to the valve body of the ring-shaped fixing member, and the shape of the ring-shaped fixing member resistance-welded to the tapered stepped portion is partially shown. FIG. 10B is a diagram partially showing the shape of a ring-shaped fixing member that is resistance-welded to a flat stepped portion, and FIG. It is a figure which shows partially the shape of the ring-shaped fixing member resistance-welded to the front-end | tip, FIG.10 (d) shows partially the shape of the ring-shaped fixing member which welds the ring-shaped fixing member and the upper surface of a valve main body. FIG. 10 (e) is a diagram partially showing the shape of the ring-shaped fixing member and the ring-shaped fixing member and the upper surface of the valve body that are provided with protrusions and welded. FIG. 11 (a) is an enlarged cross-sectional view showing the vicinity of a valve main body portion of a solenoid valve that is a sixth embodiment of the valve device according to the present invention, and FIG. 11 (b) shows a fixing member with a slit. FIG. 11C is a perspective view showing a spacer.

Embodiments of the present invention will be described below with reference to the drawings.
Note that the upper and lower concepts in the following description correspond to the upper and lower sides in FIGS. 1 to 11 and indicate the relative positional relationship between the members, not the absolute relationship.

First, a first embodiment of the present invention will be described.
2 is a cross-sectional view showing an electromagnetic valve 200 that is a first embodiment of the valve device according to the present invention, and FIG. 3 is an enlarged cross-sectional view showing the vicinity of the valve main body of the electromagnetic valve 200 shown in FIG. FIG. A solenoid valve 200 shown in FIGS. 2 and 3 is a normally-closed solenoid valve for fluid control.

  2 and 3, the electromagnetic valve 200 which is the first embodiment of the valve device according to the present invention includes a valve main body 210, a plunger unit 220 disposed on the valve main body 210, and a plunger unit 220. And an electromagnetic coil assembly 230 that excites an attractor 223 and a plunger 222, which will be described later.

  The valve main body 210 communicates with an inlet port 211a connected to the first joint 201, an outlet port 211b connected to the second joint 202, an inlet port 211a, and an outlet port 211b. 222 is movably accommodated, and a valve body 211 having a valve port 211f provided on a valve seat 211d that is in contact with the valve body 212 at the top of the outlet port 211b, and is accommodated in the valve chamber 211c. A spherical valve body 212 that is held by a valve body holder 225 fixed to the lower end of a plunger 222, which will be described later, and opens and closes a valve port 211f provided in the valve seat 211d, and a cylindrical filter that prevents the entry of foreign matter from the outside 213, a ring-shaped fixing member 214 that fixes the cylindrical filter 213 from above, and a valve seat 21 on the bottom surface of the valve chamber 211c. d is disposed on the step portion 211h of annular shape disposed around the and a cushioning member 215.

  The plunger unit 220 includes a plunger tube 221 that is a cylindrical member fixed to the upper opening of the valve body 211, a plunger 222 that is a movable iron core that can slide up and down in the plunger tube 221, and the plunger tube 221. A suction element 223, which is a fixed iron core fixed to the upper end, and a plunger chamber 222a, which is a substantially cylindrical hole provided in the upper central part of the plunger 222, between the plunger 222 and the suction element 223 A coil spring 224 that is retracted in a direction to close the valve body 212, and is fixed to the lower end of the plunger 222, has a substantially cylindrical shape, the lower end portion extends inward, and the valve body 212 is provided therein. Is mounted in a valve body holder 225 that holds the lower end of the plunger 222 and a lower end hollow portion 222d provided in the lower portion of the plunger 222, It is disposed between the 222 and the valve body 212, and a valve spring 226 for urging the valve body 212 in the valve closing direction.

  In the plunger 222, a vertical pressure equalizing hole 222b and a horizontal pressure equalizing hole 222c are formed. Thereby, the plunger chamber 222a and the valve chamber 211c are communicated and pressure-equalized. Further, a lateral through hole 225 a is formed in the vicinity of the middle stage of the valve body holder 225. As a result, the inside of the valve body holder 225 communicates with the valve chamber 211c, and the high-pressure fluid acts from above the valve body 212 immediately before the valve body 212 closes the valve port 211f provided in the valve seat 211d. In addition, the valve body 212 can reliably close the valve port 211f provided in the valve seat 211d by the pressure difference.

  The electromagnetic coil assembly 230 includes a resin bobbin 231 concentrically attached to the plunger tube 221, a coil 232 wound around the bobbin 231 to excite the plunger 222 and the attractor 223, and a lead wire connected to the coil 232. 233 and the bobbin 231 around which the coil 232 is wound are covered with resin, the casing 234 that houses the bobbin 231 and the coil 232 covered with the resin, and a bolt that fixes the casing 234 to the suction element 223 235.

  Next, the operation of this embodiment will be described. The solenoid valve 200 is a normally closed solenoid valve. In a normal state, the plunger 222 is pushed downward by the biasing force of the coil spring 224 disposed in the plunger chamber 222a of the plunger 222, and the lower end of the plunger 222 is hollow. The valve body 212 is pressed against the valve port 211f disposed at the center of the bottom surface of the valve chamber 211c of the valve body 211 by the urging force of the valve spring 226 disposed in the portion 222d, and the valve is closed.

  Next, when the coil 232 is energized from the lead wire 233, the attractor 223 and the plunger 222 are excited. As a result, an attracting force is generated between the suction element 223 and the plunger 222, and this attracting force surpasses the urging force of the coil spring 224 and is held by the plunger 222 and the valve body holder 225 fixed thereto. The spherical valve body 212 moves upward.

  When the valve body 212 moves upward, the valve port 211f is opened, and the electromagnetic valve 200 is in the valve open state. As a result, the fluid that has flowed in is discharged from the first joint 201 to the second joint 202 through the inlet port 211a, the valve chamber 211c, the valve seat 211d, and the outlet port 211b.

  In order to change the solenoid valve 200 from the valve open state to the valve closed state, the energization from the lead wire 233 to the coil 232 is interrupted, and the attractor 232 and the plunger 222 are demagnetized. As a result, the attracting force between the suction element 223 and the plunger 222 disappears, and the biasing force of the coil spring 224 causes the plunger 222, the valve body holder 225 fixed to the plunger 222, and the spherical valve body 212 held by the plunger 222. Moves downward, closes the valve port 211f provided in the valve seat 211d, and the electromagnetic valve 200 enters the valve closed state.

  In this embodiment, the valve body holder 225 and the valve spring 226 are provided at the lower end of the plunger 222, but this structure is a high-pressure compatible electromagnetic valve in which a high differential pressure acts on the valve body 212. That is, when the valve is closed, the valve body 212 first contacts the valve port 211f, and then the bottom surface of the valve body holder 225 contacts the lower surface of the valve chamber 211c. There is little impact when the valve body 212 and the valve port 211f are in contact with each other, the deformation is prevented, the flow of the fluid is stopped even when the valve is used for a long time, the valve can be stably seated when the valve is closed, and the valve leakage can be prevented. . Further, when the valve is opened, it is possible to prevent the generation of noise due to the dance of the valve body 212 in the valve body holder 225. By adopting such a configuration, a high-pressure compatible solenoid valve in which a high differential pressure acts on the valve body 212 is achieved. However, the present invention is not limited to this configuration, and can be applied to other configurations.

  Next, the cylindrical filter 213, the ring-shaped fixing member 214, and the buffer member 215 used in the valve device according to the present invention will be described.

  The cylindrical filter 213 is a sintered body in which a metal wire is knitted into a cylindrical shape. The cylindrical filter 213 is a high-strength porous body and can retain its shape. As shown in FIG. 3, the cylindrical filter 213 is disposed inside the inner wall of the valve chamber 211 c of the valve body 211 and around the valve body holder 225 that holds the valve body 212. The cylindrical filter 213 has a cylindrical shape here, but is not limited to this.

  The ring-shaped fixing member 214 has a substantially cylindrical shape, and is provided with a flange 214a at the top. A step portion 214b, which is the lower surface of the flange 214a, contacts the step portion 211e of the valve body 211 and is used for positioning the cylindrical filter 213.

  The buffer member 215 is a ring-shaped member that is provided to alleviate the metallic noise caused by the collision between the bottom surface of the valve chamber 211c and the valve body holder 225, and has a circular through hole 215a at the center. As a material of the buffer member 215, a material that is not easily deformed by an impact, such as a fluororesin such as PTFE, a PAI resin, a PEEK resin, or a hard rubber, and that is not affected by the fluid to be controlled can be appropriately selected and used. The buffer member 215 is disposed in the step portion 211h provided around the valve seat 211d on the bottom surface of the valve chamber 211c, and then the cylindrical filter 213 so that the lower surface 213b of the cylindrical filter 213 is in contact with the buffer member 215 on the upper portion thereof. After that, the ring-shaped fixing member 214 is press-fitted and fixed to the valve body 211 so that the upper surface 213a of the cylindrical filter 213 contacts the lower surface 214c of the ring-shaped fixing member 214. Further, when the buffer member 215 is fixed (pressed / abutted) by the cylindrical filter 213 or the ring-shaped fixing member 214, it is acceptable even if the outer diameter intersection of the buffer member 215 is increased. Furthermore, there is an advantage that even if the size of the buffer member 215 increases in the outer diameter direction, the buffer member 215 can be accommodated in the stepped portion by being swollen by a fluid or impacted at a high temperature.

  The ring-shaped fixing member 214 is a portion whose outer diameter is slightly larger than the inner diameter of the valve chamber 211c provided substantially below the outer periphery of the ring-shaped fixing member 214 and below the flange 214a when press-fitted and fixed. The press-fitting surface 214d is fixed by being in contact with a portion of the side wall of the valve chamber 211c that is above the flow path portion 211g and below the step portion 211e.

  The cylindrical filter 213 has a lower surface 213b provided in the step portion 211h of the valve chamber 211c in order to prevent foreign matters contained in the fluid flowing in from the inlet port 211a from passing through the valve body 212 and the valve port 211f inside the valve chamber 211c. The ring-shaped fixing member 214 is supported from the upper surface 213a so as to be in close contact with the buffer member 215. Positioning in the height direction is performed by the stepped portion 214b of the flange 214a of the ring-shaped fixing member 214 coming into contact with the stepped portion 211e provided at the upper portion of the valve chamber 211c of the valve body 211.

  The fluid that has flowed in through the inlet port 211a from the first joint 201 passes through the flow path portion 211g, which is a recessed portion provided in the outer peripheral portion of the cylindrical filter 213 inside the valve chamber 211c. Around the periphery, the entire cylindrical filter 213 is flowed into the valve chamber 211c having the valve body 212 and the valve seat 211d. For this reason, a pressure loss can be made small and a large flow rate can be obtained. In the present embodiment, the flow path portion 211g is a recessed portion in the valve chamber 211c. However, the flow path portion 211g may be provided with a space between the valve body 211 and the cylindrical filter 213. If the shape of the filter 213 is not a cylinder but a shape like a funnel, the upper part is widened and the lower part is concave, there is a space for fluid to flow, so there is no need to provide a concave part in the valve chamber 211c. . Further, since the cylindrical filter 213 is installed so as to cover the valve body 212 and the valve seat 211d, the cylindrical filter 213 absorbs the sound when the valve is seated, and the silence is improved.

  The buffer member 215 is provided with a through hole 215a in the center, and the valve port 211f provided in the valve seat 211d at the center of the bottom surface of the metal valve chamber 211c directly contacts the metal valve body 212. To do. Thereby, durability and operability against valve leakage can be maintained. On the other hand, since the metal valve body holder 225 provided around the valve body 212 is in contact with the buffer member 215, the metal sound caused by the collision between the bottom surface of the valve chamber 211c and the valve body holder 225 is reduced. Can do. The metal sound may be not only sound quality but also sound quality for the user. By providing the buffer member 215, the sound quality also changes, so that both the sound volume and sound quality can be improved.

  The buffer member 215 is fitted into a step portion 211h provided on the bottom surface of the valve chamber 211c, and any thickness can be applied according to the depth of the counterbore. When the counterbore 211h is deepened to increase the thickness of the buffer member 215, the buffer member 215 can be press-fitted into the valve body 211 and firmly fixed. In addition, by increasing the thickness of the buffer member 215 by the amount of counterbore, it is expected that the effect of alleviating the metal sound caused by the collision with the valve body holder 225 is further improved.

  Further, it is desirable that the surface of the buffer member 215 is flush with the valve seat 211d and the bottom surfaces of the other valve chambers 211c so as not to disturb the fluid flow. Thereby, a metallic sound can be relieved, without producing a bad influence on an operation performance or a flow volume. In the present embodiment, the buffer member 215 and the cylindrical filter 213 are separate members. However, the material cost and the number of assembling steps can be reduced by integrally forming them as one component.

  Note that the cylindrical filter 213 and the ring-shaped fixing member 214 of the present embodiment correspond to a cylindrical member.

  As described above, according to the valve device of the present embodiment, by providing the buffer member on the contact surface between the valve main body and the valve body holder, it is possible to reduce the metal noise when the valve is closed. Further, the valve seat and the valve body can be made of metal, and durability and operability against valve leakage can be maintained. Moreover, since the cylindrical filter is disposed on the buffer member provided at the bottom of the valve chamber and the ring-shaped fixing member is press-fitted and fixed, the buffer member can be fixed by a method with a small number of manufacturing steps.

  Next, a second embodiment of the present invention will be described.

  FIG. 4 is an assembly diagram of the main part near the valve main body of the solenoid valve 400 which is the second embodiment of the valve device according to the present invention. FIG. 5 is a cross-sectional view showing a main part in the vicinity of the valve main body of the electromagnetic valve 400 shown in FIG.

  The solenoid valve 400, which is the second embodiment of the valve device according to the present invention, removes the solenoid valve 200, which is the first embodiment of the valve device according to the present invention, and the cylindrical filter 213, and only the ring-shaped fixing member 414. However, the other components are the same. 4 and 5, the same components as those in FIGS. 2 and 3 are denoted by the same reference numerals, and redundant description thereof is omitted.

  The ring-shaped fixing member 414 has a substantially cylindrical shape, and is provided with a flange 414a at the top. The step portion 414b which is the lower surface of the flange 414a contacts the step portion 211e of the valve body 211 and is used for positioning when the buffer member 215 is fixed. In addition, four circular through holes 414e through which the fluid that has flowed in from the first joint 201 through the inlet port 211a passes are provided in the lower part of the ring-shaped fixing member 414. Here, four through holes 414e are provided. However, the present invention is not limited to this, and one or a plurality of other holes may be used.

  The ring-shaped fixing member 414 is arranged such that after the buffer member 215 is disposed on the step portion 211h provided around the valve seat 211d on the bottom surface of the valve chamber 211c, the lower surface 414c of the ring-shaped fixing member 414 contacts the upper portion thereof. Further, the ring-shaped fixing member 414 is press-fitted and fixed to the valve body 211. During the press-fitting and fixing, the press-fitting surface 414d, which is a portion whose outer diameter is slightly larger than the inner diameter of the valve chamber 211c provided at the upper stage of the outer periphery of the ring-shaped fixing member 414, is fixed by being in contact with the side wall of the valve chamber 211c. Is done.

  Note that the ring-shaped fixing member 414 of the present embodiment corresponds to a cylindrical member.

  As described above, the same effect as that of the first embodiment can be obtained also by the valve device of this embodiment. Furthermore, since only the ring-shaped fixing member is used as a component for fixing the buffer member except for the cylindrical filter, the material cost and the number of manufacturing steps can be reduced.

  Next, a third embodiment of the present invention will be described.

  FIG. 6 is an assembly diagram of the main part in the vicinity of the valve main body of the electromagnetic valve 600 which is the third embodiment of the valve device according to the present invention. FIG. 7 is a cross-sectional view showing the main part near the valve main body of the electromagnetic valve 600 shown in FIG. 6, and FIG. 7 (a) is a cross-sectional view of the main part near the valve main body. FIG. 7B is an enlarged view of the vicinity of the step portion 615b of the buffer member 615 shown in VIIB of FIG.

  The electromagnetic valve 600 which is the third embodiment of the valve device according to the present invention includes an electromagnetic valve 200 which is the first embodiment of the valve device according to the present invention, and a cylindrical filter 213 on the outer peripheral surface of the buffer member 615. Other components are the same except that a step portion 615b for positioning is provided. 6 and 7, the same components as those in FIGS. 2 and 3 are denoted by the same reference numerals, and redundant description thereof is omitted.

  The buffer member 615 is an annular member having a circular through hole 615a at the center, and further, a step portion 615b for positioning the cylindrical filter 213 is provided on the outer peripheral surface thereof. By providing the step portion 615b, the lower surface 213b of the cylindrical filter 213 comes into contact with the step portion 615b of the buffer member 615, and the cylindrical filter 213 is disposed at an accurate position. In the present embodiment, the cylindrical filter 213 is disposed on the upper surface of the buffer member 615. However, as shown in the second embodiment, the ring-shaped fixing member 414 is replaced with the buffer member 615 except for the cylindrical filter 213. You may arrange | position directly on the surface top of.

  Note that the cylindrical filter 213 and the ring-shaped fixing member 414 of the present embodiment correspond to a cylindrical member.

  As described above, the same effects as those of the first and second embodiments can also be obtained by the valve device of the present embodiment. Furthermore, by providing a step portion on the outer peripheral portion of the upper surface of the buffer member, the cylindrical filter or the ring-shaped fixing member can be disposed at an accurate position on the upper portion.

  Next, a fourth embodiment of the present invention will be described.

  FIG. 8 is an enlarged sectional view showing the vicinity of the valve main body of an electromagnetic valve 800 which is the fourth embodiment of the valve device according to the present invention. FIG. 8A is an enlarged view of the vicinity of the valve main body. FIG. 8B is an enlarged view of the vicinity of the buffer member 815 shown in VIIIB of FIG.

  An electromagnetic valve 800 that is the fourth embodiment of the valve device according to the present invention is replaced with the electromagnetic valve 200 that is the first embodiment of the valve device according to the present invention and the buffer member 215 provided in the valve chamber 211c. In addition, the other components are the same except that the buffer member 815 is disposed at the step portion 811 h provided at the portion of the valve body 811 that contacts the uppermost plunger 222. 8 and 9, the same components as those in FIGS. 2 and 3 are denoted by the same reference numerals, and redundant description thereof is omitted.

  The buffer member 815 is provided to alleviate the metallic noise caused by the collision between the valve body 811 and the plunger 222, has a ring shape, and is deformed by an impact such as a fluororesin such as PTFE, a PAI resin, a PEEK resin, or a hard rubber. In addition, a material that is not easily affected by the fluid to be controlled can be appropriately selected and used. The buffer member 815 is provided with a step 815 b on the lower surface thereof, and is disposed on a step 811 h provided on a portion of the valve main body 811 in contact with the uppermost plunger 222. The buffer member 815 is press-fitted and fixed to the step portion 811 h of the valve body 811.

  As described above, the same effects as those of the first to third embodiments can be obtained also by the valve device of the present embodiment. Moreover, a buffer member can be provided without performing difficult counterbore processing on the bottom surface of the valve chamber, and metal noise caused by the collision between the valve body and the plunger can be mitigated.

  Next, a fifth embodiment of the present invention will be described.

  FIG. 9 is an enlarged cross-sectional view showing the vicinity of the valve main body of an electromagnetic valve 900 that is the fifth embodiment of the valve device according to the present invention.

  The solenoid valve 900 which is the fifth embodiment of the valve device according to the present invention includes a solenoid valve 200 which is the first embodiment of the valve device according to the present invention and a ring-shaped fixing member 914 which is press-fitted and fixed to the valve body 911. Instead, the other components are the same except that they have a configuration of being fixed by the welded portion 916. In FIG. 9, the same components as those in FIGS. 2 and 3 are denoted by the same reference numerals, and redundant description is omitted.

  In the ring-shaped fixing member 914, a tapered step portion 914b that is inclined upward toward the outer periphery is formed on the lower surface of the flange 914a. A part of the inclined surface of the tapered step portion 914b comes into contact with a corner portion of the step portion 911e of the valve body 911, and this contact point is fixed as a welded portion 916 by resistance welding. Therefore, on the lower side of the step portion 914b of the ring-shaped fixing member 914, a concave portion 914e is provided in order to ensure that the corner portion of the step portion 911e of the valve body 911 and the tapered step portion 914b of the ring-shaped fixing member 914 are in contact with each other. It is desirable to be provided. In addition, as shown below, the shape of the ring-shaped fixing member 914 or the welding method is not limited to the shape and method described here.

  FIG. 10 shows another shape for fixing the ring-shaped fixing member to the valve body by welding.

  FIG. 10A shows the same shape as FIG. 9 in an enlarged manner, and the ring-shaped fixing member 914 is formed with a tapered step 914b inclined upward toward the outer periphery on the lower surface of the flange 914a. Has been. A part of the slope of the tapered step portion 914b and the corner portion of the step portion 911e of the valve body 911 are in contact with each other, and this contact point is fixed by the welded portion 916.

  In FIG. 10B, the ring-shaped fixing member 1014 has a flat step portion 1014b on the lower surface of the flange 1014a. This flat step portion 1014b and a part of the step portion 1011e of the valve body 1011 are in contact with each other, and this contact point is fixed by the welded portion 1016.

  In FIG. 10C, the ring-shaped fixing member 1014A is formed with a tapered step portion 1014Ab that is inclined downward toward the outer periphery on the lower surface of the flange 1014Aa. The tip of the tapered step portion 1014Ab and a part of the step portion 1011Ae of the valve main body 1011A are in contact with each other, and this contact point is fixed by the welded portion 1016A.

  In FIG. 10D, a planar step portion 1014Bb is formed on the lower surface of the flange 1014Ba in the ring-shaped fixing member 1014B. The flat step portion 1014Bb and the step portion 1011Be of the valve main body 1011B are in contact with each other, but the welded portion 1016B fixed by welding becomes the tip of the upper surface of the flange 1014Ba and the end surface 1011Bi of the upper portion of the valve main body 1011B. Since the welded portion is exposed, in this embodiment, various types of welding such as TIG (Tungsten Inert Gas) welding or laser welding can be used.

  In FIG. 10E, the ring-shaped fixing member 1014C has a flat step portion 1014Cb on the lower surface of the flange 1014Ca and a protrusion 1014Cf on the tip of the upper surface of the flange 1014Ca. A protrusion 1011Cj is also formed at the tip of the end face 1011Ci on the upper surface of the valve main body 1011C, the protrusion 1014Cf and the protrusion 1011Cj come into contact with each other, and this contact point is fixed by the weld 1016C. Since the welded portion is exposed, various types of welding such as TIG welding or laser welding can also be used in this embodiment.

  Note that the cylindrical filter 213 and the ring-shaped fixing members 914, 1014, 1014A, 1014B, and 1014C of this embodiment constitute a cylindrical member.

  As described above, the same effect as that of the first embodiment can be obtained also by the valve device of this embodiment. In addition, the ring-shaped fixing member can be fixed to the valve main body by welding fixing as well as the above-described press-fitting fixing.

  Next, a sixth embodiment of the present invention will be described.

  FIG. 11A is an enlarged cross-sectional view showing the vicinity of the valve main body of an electromagnetic valve 1100 that is the sixth embodiment of the valve device according to the present invention, and FIG. FIG. 11C is a perspective view showing the spacer 1115. FIG.

  A solenoid valve 1100 that is a sixth embodiment of the valve device according to the present invention includes a solenoid valve 200 that is the first embodiment of the valve device according to the present invention, and a slitted fixing member 1114 as a ring-shaped fixing member. The other constituent elements are the same except that the spacer 1115 is included and is fixed to the valve body 1111 by the elastic force of the fixing member 1114 with slits. In FIG. 11, the same components as those in FIGS. 2 and 3 are denoted by the same reference numerals, and redundant description is omitted.

  The slit-containing fixing member 1114 has elasticity and is a member having a C shape in which a slit is formed in a part of the ring shape. After the spacer 1115 is inserted into the valve body 1111, the slit-containing fixing member 1114 is inserted along the tapered portion 1111 i of the valve body 1111 toward the bottom surface side of the valve chamber 1111 c. At this time, the slit-containing fixing member 1114 designed to have a slightly larger diameter is accommodated in the valve chamber 1111c while the width of the slit 1114c is narrowed by the elastic force. The slit-containing fixing member 1114 accommodated in the valve chamber 1111c is fixed to the valve body 1111 by the reaction force of the elastic force.

  The spacer 1115 is an annular member provided to prevent foreign matters in the fluid from entering the solenoid valve. For this reason, the spacer 1115 is inserted after the cylindrical filter 113 is inserted into the valve body 1111 and before the fixing member 1114 with the slit is inserted.

  Note that the cylindrical filter 213, the slit-containing fixing member 1114, and the spacer 1115 of the present embodiment correspond to a cylindrical member.

  As described above, the same effect as that of the first embodiment can be obtained also by the valve device of this embodiment. Further, a slit-shaped fixing member is used as the ring-shaped fixing member, and the ring-shaped fixing member can be fixed to the valve body by this elastic force.

  Although the valve device of the present invention has been described using a normally closed electromagnetic valve for fluid control, the present invention is not limited to this, and is applicable to other valve devices having a similar configuration such as a flow control valve. Is possible. Furthermore, the fluid is not particularly limited and can be applied, and the same effect is expected.

  As described above, according to the valve device of the present invention, the metal sound generated by the contact between the valve main body and the valve body holder can be mitigated by providing the buffer member on the contact surface. Further, the valve seat and the valve body can be made of metal, and durability and operability against valve leakage can be maintained. Further, since the cylindrical filter is disposed on the buffer member provided at the bottom of the valve chamber and further fixed by the ring-shaped fixing member, the buffer member can be fixed by a method with a small number of manufacturing steps.

200, 900, 1100 Valve device (solenoid valve)
201 First joint 202 Second joint 210, 810, 910, 1110 Valve body 211, 811, 911, 1011, 1011A, 1011B, 1011C, 1111 Valve body 211a, 811a, 911a, 1111a Inlet port 211b, 811b, 911b, 1111b Outlet port 211c, 811c, 911c, 1111c Valve chamber 211d, 811d, 911d, 1111d Valve seat 211e, 811e, 911e, 1011e, 1011Ae, 1011Be, 1011Ce Step part 211f, 811f, 911f, 1111f Valve port 211g, 811g , 911 g, 1111 g channel portion 211 h, 811 h, 911 h, 1111 h step portion 212 valve body 213 cylindrical filter 213 a upper surface 213 b lower surface 214, 414, 914, 014, 1014A, 1014B, 1014C Ring-shaped fixing member 214a, 414a, 914a, 1014a, 1014Aa, 1014Ba, 1014Ca flange 214b, 414b, 914b, 1014b, 1014Ab, 1014Bb, 1014Cb Stepped part 214c, 414c Lower surface 214d, 414d Press-fit surface 215 , 615, 815 Buffer member 215a, 615a Through hole 220 Plunger unit 221 Plunger tube 222 Plunger 222a Plunger chamber 222b Vertical pressure equalizing hole 222c Lateral pressure equalizing hole 222d Lower end hollow part 223 Suction element 224 Coil spring 225 Valve body holder 225a Through-hole 226 Valve spring 230 Electromagnetic coil assembly 231 Bobbin 232 Coil 233 Lead wire 234 Casing 235 Bolt 414e Through-hole 615b, 815b Stepped portion 914e, 1014e, 1014Ae, 1014Be, 1014Ce Recessed portion 916, 1016, 1016A, 716B, 716C Welded portion 1011Bi, 1011Ci End face 1011Cj Protruding portion 1014Cf Protruding portion 1014

Claims (12)

A plunger movable with a valve body in a plunger tube to open and close a valve port provided in the valve seat;
An inlet port connected to the first joint, an outlet port connected to the second joint, a valve chamber communicating with the inlet port and the outlet port and containing the valve body, and in contact with the valve body A valve body having at least the valve seat;
A valve device comprising:
A valve device comprising: a buffer member disposed between the valve body and the plunger, and further disposed at a step portion provided in the valve body.   The valve device according to claim 1, wherein the buffer member has an annular shape. A step provided in the valve body is formed around the valve seat on the bottom surface of the valve chamber,
The valve device according to claim 2, wherein the buffer member is disposed in the stepped portion.   In order to fix from the surface of the valve main body opening side of the buffer member, a cylindrical member is provided around the valve body inside the valve chamber and fixed to the valve main body. The valve device according to claim 3.   The valve device according to claim 4, wherein the cylindrical member is press-fitted and fixed to the valve main body.   The valve device according to claim 4, wherein the tubular member is fixed to the valve body by welding. The cylindrical member is
A slitted fixing member in which a slit is formed in a part of the ring shape;
The valve device according to claim 4, further comprising a spacer provided on a bottom surface side of the valve chamber of the slit-containing fixing member. The cylindrical member is
A cylindrical filter that is disposed around the valve body inside the valve chamber, and a bottom surface of the valve chamber is in contact with the buffer member;
In order to fix the buffer member and the cylindrical filter, a ring-shaped fixing member that supports a surface of the cylindrical filter on the valve body opening side and is fixed to the valve body;
The valve device according to any one of claims 4 to 7, further comprising:   The contact surface with the plunger of the buffer member arranged in the stepped portion is flush with the valve seat without any step. Valve device. The buffer member has a step portion provided on the outer peripheral portion of the contact surface with the plunger,
The bottom surface of the valve chamber of the tubular member is in contact with an outer peripheral portion of the plunger abutting surface of the buffer member, and the tubular member is aligned. The valve device according to any one of 4 to 8. The plunger is
A valve body holder fixed to the bottom surface side of the valve chamber and holding a spherical valve body inside;
A valve spring disposed in the valve body holder and biasing the valve body in a valve closing direction;
The valve device according to any one of claims 1 to 10, further comprising:   The valve device according to claim 1, wherein the valve device is an electromagnetic valve.