JPH0734275U - Control valve - Google Patents

Abstract

(57) [Abstract] [Purpose] Aim for miniaturization and stable performance. A structure is provided with a through hole 14 penetrating in the moving direction of the valve body 2 moving between the first and second valve seats 4 and 7, and a guide member 13 for guiding the valve body 2 in the moving direction is provided in the through hole 14. The feature is that it is slidable.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a control valve used for controlling, for example, various oils and pneumatic equipment.

[0002]

[Prior art]

 A conventional control valve of this type is, for example, as shown in FIG. That is, in this control valve, the solenoid valve 100 is used to turn on and off the solenoid 102 as a drive means for driving the plunger 101 as a valve body, thereby moving the plunger 101 to change the pressure. It is a 3-way valve that switches.

The solenoid valve 100 includes a solenoid 102 and a valve body 104 that is provided coaxially and integrally with the solenoid 102 and has a first valve seat 103.

The solenoid 102 is hollow inside, and the first valve seat 103 is disposed on one open end side of the hollow part 105 so as to face the hollow part 105, and the other open end part is provided. A second valve seat 106 is coaxially arranged so as to face the inside of the hollow portion 105 and face the first valve seat 103.

The plunger 101 is movably inserted into the hollow portion 105 of the solenoid 102 between the first and second valve seats 103 and 106. The plunger 101 has a columnar shape, and the outer peripheral surface of the plunger 101 is provided with two equal passages 107 for allowing fluid on both end surfaces of the plunger 101.

The first and second valve seats 103 and 106 respectively have first and second flow paths 108 and 109 that open on the central axis.

An output passage 110 for outputting the control pressure Pc to the outside is formed in the outer peripheral portion of the first flow passage 108 in the valve body 104. The output passage 110 has an axial passage 110A which is open in the hollow portion 105, extends in the axial direction at a predetermined radial interval on the outer peripheral portion of the first passage 108, and is formed around the entire circumference. The radial passage 110B extends radially outward from the inner end and opens to the outside.

A spring 111 as a pressing means for pressing the plunger 101 against the second valve seat 106 is provided in the axial passage 110A of the output passage 110. When the solenoid 102 is in the OFF state, the spring 111 is provided. Due to the spring force, the plunger 101 is separated from the first valve seat 103 and brought into contact with the second valve seat 106, and the second flow passage 109 is closed. At this time, since the first flow passage 108 opening to the first valve seat 103 is opened, the fluid pressure P ₀ from the first flow passage 108 is supplied to the hollow portion 105 and passes through the output passage 110 to control pressure P _C. Is output to the outside.

On the other hand, by turning on the solenoid 102, the plunger 101 is separated from the second valve seat 106 against the spring force of the spring 111, and is magnetically attracted to the first valve seat 103 side. The first flow path 108 is closed by bringing it into contact with 103. At this time, since the second flow passage 109 opening to the second valve seat 106 is opened, the fluid pressure in the hollow portion 105 is drained to the outside via the second flow passage 109.

[0010]

[Problems to be solved by the device]

 By the way, in the case of the above-mentioned conventional technique, the force acting on the plunger 101 is as follows. Formula 1 shows the fluid pressure at the OFF position of the solenoid 102, and Formula 2 shows the fluid pressure at the ON position of the solenoid 102. Then, in Equations 1 and 2, P is fluid pressure, A_P Is the seal area between the plunger 101 and the first valve seat 103, A_D Is the seal area between the plunger 101 and the second valve seat 106, F _SP Is the spring force of the spring 111.

[0011]

[Equation 1] F _(OFF) = PA _D + F _SP

[0012]

## EQU00002 ## F _(ON) = PA _P + F _{SP From the} above formula, the fluid pressure becomes high, that is, P becomes large, or the large flow rate, that is, A _P and A _D become large, and this is overcome. The magnetic attraction force of the solenoid 102 for driving 101 must be large. Therefore, there is a problem that the solenoid 102 becomes large and the device becomes large.

Further, in the case of the prior art, the arrangement of the spring 111, which opposes the magnetic attraction force of the solenoid 102, is determined by the axial passage of the output passage 110 that forms a passage for outputting the control pressure P _C to the valve body 104. Since it is inserted into 110A, it may become a resistance of the flow path, and it may not be possible to obtain a desired control pressure P _C, and there is also a problem that control performance deteriorates.

The present invention has been made in order to solve the above-mentioned problems of the prior art, and its object is to provide a solenoid that can be downsized and its performance can be stabilized. is there.

[0015]

[Means for Solving the Problems]

 In order to achieve the above object, in the present invention, first and second valve seats provided to face each other, a valve body moving between the first valve seat and the second valve seat, and the valve body To press one of the first and second valve seats so as to contact the valve seat, and to the other valve seat of the first and second valve seats against the pressing force of the pressing means. Drive means for driving the valve body so as to be in contact with each other, and the valve body is brought into contact with and separated from the first and second valve seats by the pressing force of the pressing means and the driving force of the drive means to open each. In a control valve that opens and closes the first and second flow paths, a through hole that penetrates in the moving direction is provided in the valve body, and a guide member that guides the valve body in the moving direction is slidably provided in the through hole. It is characterized by

It is preferable that the pressing means is provided between the through hole step portion provided on the inner peripheral surface of the through hole of the valve body and the guide step portion provided on the guide member.

[0017]

[Action]

 In the control valve having the above configuration, the diameter of the through hole provided in the valve body that moves between the first and second valve seats and penetrating in the moving direction and the guide member slidably provided in the through hole. The fluid pressure acting on the valve body can be freely set by setting the relationship between the area between the valve body and the seal area between the valve body and the first and second valve seats. Accordingly, if the area between the hole diameter portion of the through hole and the guide member and the seal areas are substantially the same, the force acting on the valve element is only the pressing force of the pressing means. It can be controlled by the drive means regardless of the fluid pressure (and flow rate) applied to the body. Therefore, even with a high fluid pressure (and a large flow rate), control can be performed with a small driving force.

Further, by providing the pressing means between the through hole step portion provided on the inner peripheral surface of the through hole of the valve body and the guide step portion provided on the guide member, the control pressure is output as in the prior art. Since it is not necessary to provide it in the output passage as a flow passage, the resistance of the flow passage can be reduced and a desired control pressure can be obtained.

[0019]

【Example】

 The present invention will be described below based on the illustrated embodiment. In FIG. 1 showing a control valve according to an embodiment of the present invention, reference numeral 1 denotes an entire solenoid valve as a control valve, and a solenoid 3 as a drive means for driving a plunger 2 as a valve body is shown. It is a three-way valve that switches the pressure by moving the plunger 2 by turning it on and off. This solenoid valve 1 is provided integrally with the solenoid 3 and the solenoid 3 coaxially with the first valve seat 4 And a valve body 5 having

The solenoid 3 includes a case 15 having both ends opened, a coil 16 housed in the case 15, a yoke 17 that is a fixed iron core provided at one opening end of the case 15, and the other side of the case 15. A closing member 18 which is provided at the opening end of the opening and closes the opening end, and an annular ring plate 19 which is provided between the coil 16 and the closing member 18 and guides the magnetic path from the case 15 to the plunger 2. The yoke 17 and the closing member 18 are caulked and fixed at both open end portions of the case 15, respectively.

The closure member 18 is integrated with a hollow bobbin around which the coil 16 is wound, and the hollow interior of the bobbin serves as a hollow portion 6 into which the plunger 2 is movably inserted. Further, a second valve seat 7 protruding toward the hollow portion 6 on the central axis is provided at a substantially central portion in the radial direction of the closed portion of the hollow portion 6 of the closing member 18, and the central portion of the second valve seat 7 is provided on the second valve seat 7. The 2nd channel 10 which opens on a line is provided. The second flow passage 10 is stepped with a stepped portion 18A and has a large diameter on the hollow portion 6 side.

The yoke 17 is a cylindrical member having an outward flange that contacts the inner peripheral surface of the case 15, and is partially inserted along the inner peripheral surface of the hollow portion 6.

The first valve seat 4 of the valve body 5 is coaxially inserted into the inner periphery of the yoke 17 so that the valve body 5 is provided integrally with the solenoid 3. The first valve seat 4 is provided coaxially opposite to the second valve seat 7, and the end face of the first valve seat 4 is set slightly higher than the end face of the yoke 17. Further, the first valve seat 4 is provided with a first flow path 9 opening on the central axis. The first flow passage 9 is provided coaxially with the second flow passage 10 and has a step portion 51 having the same diameter as the second flow passage 10 and a step portion 51 like the second flow passage 10. In addition, the hollow portion 6 side has a large diameter.

Further, in the valve body 5, an output passage 11 for outputting the control pressure P _C to the outside is formed in the outer peripheral portion of the first flow passage 9. The output passage 11 is open to the hollow portion 6, extends in the axial direction at a predetermined radial interval on the outer peripheral portion of the first flow passage 9, and is formed along the entire circumference of the axial passage 11A. The radial passage 11B extends radially outward from the rear end and opens to the outside. The outer diameter of the axial passage 11A is substantially the same as the inner diameter of the yoke 17.

The plunger 2 is inserted into the hollow portion 6 so as to be movable between the first and second valve seats 4 and 7. The plunger 2 has a substantially cylindrical shape having a through hole 14 penetrating in the axial direction, and on its outer peripheral surface, passages 8 for allowing fluid on both end surfaces of the plunger 2 are provided in four equal parts. A guide pin 13 as a guide member for guiding the plunger 2 in the moving direction is slidably inserted into the through hole 14 of the plunger 2.

The guide pin 13 includes a large-diameter portion 13A, small-diameter portions 13B and 13B coaxially and integrally provided at both ends of the large-diameter portion 13A, and a slit 13C formed in each small-diameter portion 13B. And is fixed between the first and second valve seats 4 and 7.

The large-diameter portion 13A is located substantially at the center in the axial direction, has a predetermined clearance on the inner peripheral surface of the through hole 14, and slidably guides the plunger 2 in the moving direction. There is. Further, the small diameter portion 13B is a large diameter portion of the first and second flow passages 9 and 10 so as to be fitted into the first and second flow passages 9 and 10 which are open to the first and second valve seats 4 and 7. The diameter is almost the same as the diameter, and the distance between the end faces of the small diameter portions 13B, 13B is such that when the guide pin 13 is fixed, the respective end faces are in the stepped portions 51, 18A of the first and second flow passages 9, 10. The contact length is set.

Then, each small-diameter portion 13B is provided with a slit 13C so as to open toward the end surface that abuts on the stepped portion 51, 18A. The slits 13C have substantially the same direction and shape in each small diameter portion 13B, and the rear end is provided up to the vicinity of the large diameter portion 13A.

In the guide pin 13 configured as described above, one end of the small diameter portion 13B of the small diameter portions 13B and 13B abuts on the step portion 51 of the first passage 9 so that the large diameter of the first passage 9 is large. The end surface of the other small diameter portion 13B is fitted and fixed in the diameter portion, and the end surface of the other small diameter portion 13B is brought into contact with the step portion 18A of the second flow passage 10 so as to be fitted and fixed in the large diameter portion of the second flow passage 10. Is fixed between the first and second valve seats 4 and 7 to guide the plunger 2 in the moving direction.

On the other hand, in the axial passage 11 A of the output passage 11 of the valve body 5, a spring 12 is provided as a pushing means for pushing the plunger 2 against the second valve seat 7. One end of the spring 12 is in contact with the end surface of the plunger 2 and the other end is in contact with the rear end of the axial passage 11A. The spring 12 urges the plunger 2 toward the second valve seat 7, and the second valve The seat 7 is pressed so as to abut.

When the solenoid 3 is OFF, the spring force of the spring 12 causes the plunger 2 to be guided by the large diameter portion 13 A of the guide pin 13 slidably provided in the through hole 14. It is separated from the first valve seat 4 and moved toward the second valve seat 7, and the end face of the plunger 2 is brought into contact with the second valve seat 7 to close the second flow passage 10. At this time, since the first flow passage 9 that opens to the first valve seat 4 is open, the supply pressure P ₀ supplied from the first flow passage 9 causes the slit 13C of the guide pin 13 and the inner peripheral surface of the plunger 2 to move. Is supplied to the hollow portion 6 through the gap between the outer peripheral surfaces of the small diameter portion 13B and the small diameter portion 13B, and the control pressure P _C is output to the outside through the output passage 11.

On the other hand, by turning on the solenoid 3, the plunger 2 is guided by the large diameter portion 13 A of the guide pin 13 slidably provided in the through hole 14 against the spring force of the spring 12. Magnetically attracted to the end surface of the yoke 17. That is, the plunger 2 is separated from the second valve seat 7 and moved toward the first valve seat 4 side, and the end face of the plunger 2 is brought into contact with the first valve seat 4 to close the first flow passage 9. ing. At this time, since the second flow path 10 opening to the second valve seat 7 is opened, the control pressure P in the hollow portion 6 is reduced. _C Through the gap between the inner peripheral surface of the plunger 2 and the inner peripheral surface of the small diameter portion 13B and the slit 13C, and is drained from the second flow path 10.

In the solenoid valve as the control valve having the above structure, the plunger 2 is provided with the through hole 14 penetrating in the direction of moving between the first and second valve seats 4 and 7, and the inside of the through hole 14 is provided. Since the guide pin 13 that guides the plunger 2 in the moving direction is fixed between the first and second valve seats 4 and 7, the area A between the hole diameter portion of the through hole 14 and the small diameter portion 13B of the guide pin 13 is _{If G} , the force acting on the plunger 2 is as follows. Formula 3 shows the fluid pressure at the OFF position of the solenoid 3, and Formula 4 shows the fluid pressure at the ON position of the solenoid 3. The formulas 3 and 4, the sealing area of the seal area, A _D is the plunger 2 second valve seat 7 of P is the fluid pressure, A _P is the plunger 2 and the first valve seat 4, F _SP Spring 12 Is the spring force.

[0034]

Equation 3] _{F (OFF) = PA D +} F SP -PA G = P (A D -A G) + F SP

[0035]

Equation 4] _{F (ON) = PA P +} F SP -PA G = P (A P -A G) + F SP becomes, A _D, A _G and A _P, by setting the relation of A _G, the plunger 2 The fluid pressure acting on can be freely set.

Therefore, when A _D = A _P = A _G ,

[0037]

[Formula 5] F _(OFF) = F _SP

[0038]

[Equation 6] F _(ON) = F _SP , which can be controlled by the magnetic attraction force of the solenoid 3 regardless of the fluid pressure P (and the flow rate). That is, even with a high fluid pressure (and a large flow rate), control can be performed with the solenoid 3 having a small magnetic attraction force. Therefore, the solenoid 3 can be downsized regardless of the fluid pressure (and flow rate).

When A _D > A _G (ΔA = A _D −A _G ),

[0040]

[Equation 7] F _(OFF) = PΔA + F _SP , and when it is desired to reduce the leakage on the second valve seat 7 side, which is the OFF position side of the solenoid 3, the pressing force of PΔA can be obtained and the high pressure seal It improves the sex.

Further, when A _D <A _G (ΔA = A _G −A _D ),

[0042]

[Equation 8] F _(OFF) = -PΔA + F _SP , and when P increases, F _(OFF) <0, and the plunger 2 moves to the first valve seat 4 side, which is the ON position side of the solenoid 3, and The control pressure P _C is drained through the second flow path 10 while being separated from the second valve seat 7. That is, a relief valve function can be added depending on the balance with F _SP .

In addition, characterization can be performed as needed.

However, in the first embodiment, since the spring 12 as the pressing means is provided in the axial passage 11A of the output passage 11 as the passage for outputting the control pressure P _C , the flow is reduced. There is a problem that the desired control pressure P _c cannot be obtained as a resistance of the road, and further there is a problem that the assemblability is poor.

A second embodiment of the present invention which solves the above problems is shown in FIGS. 2 and 3. FIG. 2 (a) shows an overall vertical sectional view of a normally open type solenoid valve 1A, which is the same as the first embodiment, and FIG. 2 (b) shows an entire normally closed type solenoid valve 1A '. A vertical sectional view is shown. FIG. 3 shows a vertical sectional view of the plunger subassembly of the normally open type solenoid valve 1A. The second embodiment will be described below. The same components as those in the first embodiment will be described with the same reference numerals.

The plunger 2A according to the second embodiment is configured as follows. In other words, this plunger 2A has a structure having steps 21 and 21 that open toward the first and second valve seats 4 and 7 at both opening end portions of the through hole 14 of the plunger 2 of the first embodiment. ing. The step 21 has an L-shaped cross section, and has a tapered portion in which the hole diameter of the through hole 14 increases toward the bottom thereof.

An annular stopper 20 having an inner diameter smaller than the hole diameter of the through hole 14 is fitted and fixed to each step 21 of the plunger 2. In this way, the provision of the stopper 20 having the inner diameter smaller than the hole diameter of the through hole 14 serves as a through hole step portion protruding radially inward of the through hole 14. Further, since the guide pin 13 for guiding the plunger 2A in the moving direction has the small diameter portions 13B at both ends of the large diameter portion 13A, the end surface of the large diameter portion 13A and the outer peripheral surface of the small diameter portion 13B form a guide step portion. Become. Since the through hole step portion and the guide step portion are provided in this way, the plunger 2A is provided between the end faces of each step portion on the side of the second valve seat 7 (in the case of the normally open type) or the side of the first valve seat 4 A spring 12A as a pressing means for pressing (in the case of the normally closed type) can be mounted.

That is, in the case of the normally open type shown in FIG. 2A, between the end surface of the large diameter portion 13 A of the guide pin 13 on the second valve seat 7 side and the inner end surface of the stopper 20 on the second valve seat 7 side. The spring 12A is inserted in the. On the other hand, in the case of the normal close type shown in FIG. 2B, the large diameter portion 13A of the guide pin 13 is interposed between the end surface of the first valve seat 4 side and the inner end surface of the stopper 20 on the first valve seat 4 side. To do.

In the solenoid valve as the control valve according to the second embodiment configured as described above, the spring 12A that presses the plunger 2A toward the first valve seat 4 or the second valve seat 7 is Since it is provided between the end face of the large diameter portion 13A of the guide pin 13 and the end face of the stopper 20, it is necessary to provide it in the output passage 11 as a passage for outputting the control pressure P _C as in the first embodiment. Since it is eliminated, the resistance of the flow path can be reduced, and the desired control pressure P _C can be obtained.

Further, the plunger 2 and the guide pin 13, the spring 12A, and the stopper 20 which also constitutes the end face of the plunger 2 can be sub-assembled, and the assembling property is improved.

The solenoid valve 1A, 1A 'as the control valve of the second embodiment of the present invention shown in FIG. 2 is the same as that of the first embodiment in the configuration and operation other than the above, and is the same. The same reference numerals are given to the constituent parts of, and the description thereof will be omitted. However, since FIG. 2B is a normally closed type solenoid valve, the ring plate 19 is arranged on the first valve seat 4 side and the yoke 17 is arranged on the second valve seat 7 side. Since the yoke 17 is arranged on the second valve seat 7 side in this way, the closing member 18 'has a structure separate from the bobbin.

Further, in the first embodiment, in order to buffer the operating noise, that is, the impact noise when the plunger 2 and the first and second valve seats 4 and 7 are brought into contact with each other, FIGS. ), Steps 21A and 21A are formed at both opening ends of the through hole 14, and an elastic body such as rubber 23A is baked on each step 21A. Since the through hole 14 is provided, and the inner peripheral surface of the through hole 14 serves as a clearance and a sliding portion with the outer peripheral surface of the large diameter portion 13A of the guide pin 13, the adhesive when the rubber 23A is seized is Since it adheres to the inner peripheral surface of the through hole 14, it is difficult to manufacture since the inner peripheral surface needs to be polished after baking.

Therefore, a third embodiment of the present invention which solves the above problems is shown in FIGS. The solenoid valve 1B as the control valve of the present embodiment is the same as the solenoid valve 1 of the first embodiment, except that the plunger 2 is provided with steps 21 and 21 at both open end portions of the through hole 14 shown in the second embodiment. As the plunger 2A (see FIG. 5), a plate 22 having a rubber 23 as a cushioning member for cushioning the impact sound of the plunger 2A is provided separately from the plunger 2, and the plate 22 is provided at each step of the plunger 2. It is structured to be fixed to 21.

The plate 22 has an annular shape, and the rubber 23 is baked and fixed except for the outer peripheral portion thereof (see FIG. 7). Since the rubber 23 is not baked on the outer peripheral portion in this manner, the outer peripheral portion of the plate 22 is fixed to each step 21 of the plunger 2A (see FIG. 8).

In the solenoid valve as the control valve according to the third embodiment configured as described above, the plate 22 having the rubber 23 baked is fixed to the step 21 of the plunger 2A, so that the penetration It is possible to easily secure the surface roughness of the inner peripheral surface of the through hole 14 that slides while maintaining the clearance between the inner peripheral surface of the hole 14 and the inner peripheral surface of the large diameter portion 13A of the guide pin 13. As a result, the impact sound can be prevented and the production can be facilitated.

Further, as a method of fixing the plate 22 to the step 21 of the plunger 2A, generally, press fitting or caulking after assembling can be considered, but in the case of press fitting, dimensional accuracy of the press fitting portion is required. Therefore, caulking after assembling is desirable. However, in this case, fluid leakage occurs from the outer peripheral portion (built-in portion) of the plate 22. Therefore, in the present embodiment, when the rubber 23 is baked on both end surfaces of the plate 22 so as to be incorporated in the step 21 of the plunger 2A, the rubber 23 in the inner direction of the plunger 2A of the plate 22 is attached to the plunger 2A. The structure is configured to prevent fluid leakage by crushing at the tapered portion of the step 21.

In the above embodiment, the rubber 23 is used as an example of the cushioning member, but the cushioning member is not limited to this, and other members such as resin may be used.

The third embodiment can also be applied to the second embodiment.

Since other configurations and operations are the same as those in the above-mentioned respective embodiments, the same reference numerals are given to the same components, and the description thereof will be omitted.

In each of the above embodiments, the solenoid 3 is used as the drive means for the valve element, but the present invention is not limited to this, and other fluid pressures such as hydraulic pressure may be used. It can be applied similarly.

[0061]

[Effect of device]

 The present invention has the above-described structure and operation, and has a hole diameter of a through hole penetrating in the moving direction provided in the valve body moving between the first and second valve seats and slidable in the through hole. By setting the relationship between the area between the provided guide member and the seal area between the valve body and the first and second valve seats, the fluid pressure acting on the valve body can be freely set. . As a result, if the area between the hole diameter portion of the through hole and the guide member and the seal areas are substantially the same, the force acting on the valve element is only the pressing force of the pressing means. It can be controlled by the drive means regardless of the fluid pressure (and flow rate) that acts. Therefore, even if the fluid pressure is high (and the flow rate is high), the control can be performed by the driving means with a small driving force, and the device can be downsized.

Further, by providing the pressing means between the through hole step portion provided on the inner peripheral surface of the through hole of the valve body and the guide step portion provided on the guide member, the control pressure is output as in the prior art. Since it is not necessary to provide it in the output passage as a flow passage, the resistance of the flow passage can be reduced and a desired control pressure can be obtained. As a result, the performance is stable.

Further, a plate having a cushioning member that cushions the impact sound when the valve body contacts the valve seat is provided in the through hole on the valve seat side of at least one of the first and second valve seats of the valve body. Since it is mounted on the circumference, the adhesive etc. for fixing the buffer member does not adhere to the inner peripheral surface of the through hole of the valve body, and the guide member slides while maintaining the clearance. The surface roughness of the inner peripheral surface can be easily secured. As a result, the impact sound can be prevented and the production can be facilitated.

[Brief description of drawings]

1 (a) is an overall longitudinal sectional view of a solenoid valve as a control valve according to an embodiment of the present invention, and FIG. 1 (b) is an overall perspective view of a guide pin of FIG. 1 (a). And
FIG. 7C is a top view in which cushioning members are provided at both ends of the plunger of FIG. 7A, and FIG.
It is an A line sectional view.

FIG. 2 is an overall vertical cross-sectional view of a solenoid valve as a control valve according to a second embodiment of the present invention.
Is a normally open type, and FIG. 7B is a normally closed type.

3 is a vertical cross-sectional view of the plunger subassembly of FIG. 2 (a).

FIG. 4 is an overall vertical sectional view of a solenoid valve as a control valve according to a third embodiment of the present invention.

5 (a) is a top view of the plunger of FIG. 4, and FIG. 5 (b) is a sectional view taken along line AA of FIG. 5 (a).

6 (a) is a front view of the guide pin of FIG. 4, and FIG. 6 (b) is a sectional view taken along line AA of FIG. 6 (a).

7 (a) is a top view of the plate on which the rubber of FIG. 4 is baked, and FIG. 7 (b) is a sectional view taken along line AA of FIG. 7 (a).

8 is a vertical cross-sectional view of the plunger subassembly of FIG.

FIG. 9 (a) is an overall longitudinal sectional view of a solenoid valve as a conventional control valve, and FIG. 9 (b) is the same figure (a).
FIG. 4B is a top view of the plunger of FIG.
FIG. 9 is a sectional view taken along line AA of FIG.

[Explanation of symbols]

 1, 1A, 1A ′, 1B Solenoid valve (control valve) 2, 2A Plunger (valve body) 3 Solenoid (driving means) 4 First valve seat 5 Valve body 51 Stepped portion 6 Hollow part 7 Second valve seat 8 Passage 9 First flow passage 10 Second flow passage 11 Output passage 11A Axial passage 11B Radial passage 12, 12A Spring (pressing means) 13 Guide pin (guide member) 13A Large diameter portion 13B Small diameter portion 13C Slit 14 Through hole 15 Case 16 Coil 17 Yoke 18, 18 'Closing member 18A Step portion 19 Ring plate 20 Stopper 21 Step 22 Plate 23, 23A Rubber (buffer member)

Claims (3)

[Scope of utility model registration request] 1. A first valve seat and a second valve seat provided to face each other, a valve body moving between the first valve seat and the second valve seat, and the valve body of the first valve seat and the second valve seat. Pressing means for pressing one of the valve seats to contact it, and driving means for driving the valve element against the pressing force of the pressing means so as to contact the other valve seat of the first and second valve seats. A control valve for opening and closing first and second flow paths that open and close the valve body to and from the first and second valve seats by the pressing force of the pressing means and the driving force of the driving means. In the control valve, a through hole penetrating in the moving direction is provided in the valve body, and a guide member for guiding the valve body in the moving direction is slidably provided in the through hole. 2. The pressing means is provided between a through hole step portion provided on the inner peripheral surface of the through hole of the valve body and a guide step portion provided on the guide member. Control valve. 3. A plate having a cushioning member for cushioning impact noise when the valve body comes into contact with the valve seat is penetrated through at least one valve seat side of the first and second valve seats of the valve body. 3. The structure according to claim 1, wherein the hole is attached to the inner circumference of the hole.
The control valve described in.