JP6085416B2 - Control valve - Google Patents

Description

  The present invention relates to an improvement in a control valve that opens and closes a flow path by bringing a valve body into and out of contact with a valve seat, and is formed by pressing a valve body and a valve seat sheet member.

  In Patent Document 1, as shown in FIGS. 5 and 6, a valve main body 32 and a valve seat member 34 formed by press working, and a suction element 37 fixed inside a pipe portion 32 b of the valve main body 32, A solenoid valve 31 including a plunger 36 that is accommodated in the pipe portion 32b of the valve body 32 and moves in the vertical direction together with the valve body 33, and an electromagnetic coil 38 is described.

  When the electromagnetic valve 31 is not energized to the electromagnetic coil 38, the plunger 36 is maintained at the upper end position in the direction opposite to the attractor 37 by the coil spring 41, as shown in FIG. The seat seat member 34 is opened from the valve seat 34c, and the fluid can flow from the inflow pipe 42 to the outflow pipe 43 through the inside of the valve chamber 32a.

  When the electromagnetic coil 38 is energized from the state of FIG. 5, a magnetic force is generated that attracts the plunger 36 in the direction of filling the space between the attractor 37. As a result, the plunger 36 moves downward while resisting the biasing force of the coil spring 41, and the valve element 33 is directed to the valve seat 34 c of the valve seat member 34 while being guided by the guide portion 37 b of the suction element 37. As shown in FIG. 6, the valve portion 33a closes to the valve seat 34c and closes, and the flow of fluid from the inflow pipe 42 to the outflow pipe 43 is blocked.

JP 2008-151348 A

  However, in the conventional electromagnetic valve 31, as shown in FIG. 7, when the valve seat member 34 is mounted on the valve body 32, the flange portion 32c of the valve body 32 and the flange portion 34d of the valve seat member 34 are provided. Are overlapped and the tip portions of the two are welded. However, there is a possibility that the flange portion 34d is displaced in the left-right direction (arrow direction) with respect to the flange portion 32c during welding.

  Further, as shown in FIG. 8, when the bent portion 32d is provided in the flange portion of the valve body 32 and the edge portion of the flange portion 34d of the valve seat member 34 is abutted, the above-described lateral displacement is eliminated to some extent. However, since the bent portion 32d is melted by welding, the shift in the left-right direction cannot be completely eliminated.

  Further, the end surface contact portion 40 between the bent portion 32d and the flange portion 34d shown in FIG. 8A is also melted by welding, and the end surface contact portion 40 is shortened as shown in FIG. It becomes easy to incline in the vertical direction (arrow direction). As described above, when the lateral displacement or inclination of the valve seat member 34 occurs, the coaxiality between the valve seat member 34 and the valve body 33 cannot be ensured, and the sealing performance between the valve seat 34c and the valve portion 33a is not ensured. As a result, there is a problem that the welding conditions are lowered, and in order to prevent this, it is necessary to severely manage the welding conditions, and there is a problem that productivity is lowered.

  Therefore, the present invention has been made in view of the above-described conventional problems, and the horizontal displacement and the vertical inclination of the flange portion 34d of the valve seat member 34 with respect to the flange portion 32c of the valve main body 32 are reduced. An object of the present invention is to provide a control valve that can be suppressed and that can easily manage welding conditions.

To achieve the above object, the present invention may have a valve chamber, press a valve body formed by machining, a valve body having a valve portion disposed in said valve chamber, that the valve unit is detachably contact with the valve have a seat, a control valve comprising a valve seat sheet member formed by press working, and a driving means for driving the valve body in the closing direction and / or the valve opening direction, the open end of the valve body In the state where the bent portion provided in the flange portion and the bent portion provided in the flange portion of the valve seat member are overlapped with each other, a joint portion in which the ends of the both bent portions are welded to each other is provided. It is characterized by having.

  And according to the present invention, since the bent portion is formed in each of the flange portion of the opening end of the valve body and the flange portion of the valve seat member, both the bent portions are overlapped with each other and the end portions are welded together. Even after welding, one bent portion abuts on the other bent portion, so that the displacement of both flange portions in the extending direction can be suppressed, and the length of the contact portions of both flange portions can be maintained long. Therefore, it is possible to prevent both flange portions from being inclined in a direction away from each other.

  In addition, according to the present invention, the length at which the two bent portions overlap each other and the length at which both flange portions overlap each other can be easily set to a desired length, so there is no need to strictly manage during welding, Assemblability is improved, the number of assembling steps can be reduced, the defect rate is reduced, and the yield is improved.

  The said control valve WHEREIN: The bending part of the said valve seat sheet | seat member can be arrange | positioned inside the bending part of the said valve main body.

  As described above, according to the present invention, it is possible to suppress the horizontal displacement and the vertical inclination of the flange portion of the valve seat member relative to the flange portion of the valve body, and to easily manage the welding conditions. Can do.

It is a figure which shows one embodiment of this invention, Comprising: (a) is sectional drawing which shows a valve opening state, (b) is an AA arrow directional view of (a). It is sectional drawing which shows the valve closing state of the solenoid valve of FIG. It is sectional drawing for demonstrating the joining method of the valve main body and valve seat sheet | seat member of the solenoid valve of FIG. It is a figure which shows the guide member of the solenoid valve of FIG. 1, Comprising: (a) is a top view, (b) is BB sectional drawing of (a), (c) is a left view, (d) is a right side A front view and (e) are bottom views. It is a figure which shows an example of the conventional solenoid valve, Comprising: It is sectional drawing which shows a valve opening state. It is sectional drawing which shows the valve closing state of the solenoid valve of FIG. It is sectional drawing for demonstrating an example of the joining method of the valve main body of the solenoid valve of FIG. 5, and a valve seat sheet | seat member. It is sectional drawing for demonstrating the other example of the joining method of the valve main body of a solenoid valve, and a valve seat sheet | seat member.

  Next, modes for carrying out the present invention will be described with reference to the drawings.

  1 and 2 show an embodiment of the present invention. This electromagnetic valve 1 includes a valve body 2 having a valve chamber 2a, and a valve body 3 having a valve portion 3a disposed in the valve chamber 2a. , A valve seat member 4 having a valve seat 4c with which the valve portion 3a contacts and separates, a plunger 6 that moves together with the valve body 3, and a guide member that guides the movement of the valve body 3 and supports a coil spring 11 described later. 7, an electromagnetic coil 8 that generates a magnetic force for attracting the plunger 6 in the valve closing direction, a housing 9 that houses the electromagnetic coil 8, and a coil spring 11 that urges the plunger 6 upward. .

  The valve body 2 is formed by press working using a material such as stainless steel, and includes a cylindrical valve chamber 2a and a cylindrical pipe portion 2b whose upper end is closed. In the valve chamber 2a, a valve portion 3a of the valve body 3 and a valve seat 4c of the valve seat member 4 are disposed, and a guide member 7 is fixed by caulking at a boundary portion between the valve chamber 2a and the pipe portion 2b. Is done. Further, the valve seat member 4 is mounted so as to cover the lower opening of the valve chamber 2a. The left end portion of the inflow pipe 12 is welded to the side surface of the valve chamber 2a by brazing.

  A valve body 3, a plunger 6 and a coil spring 11 are accommodated inside the pipe portion 2b, and a housing 9 is provided on the outer periphery of the pipe portion 2b, and is pressed and fixed to the protrusion 9c of the housing 9 The protrusion 16 a of the member 16 is locked in a locking recess 2 c formed in the pipe portion 2 b of the valve body 2, and the housing 9 is fixed to the pipe portion 2 b of the valve body 2 via the pressing locking member 16.

  The housing 9 is made of a magnetic material, and through holes are provided in the upper wall 9a and the lower wall 9b of the housing 9, and the pipe portion 2b of the valve body 2 is inserted through these through holes.

  A bobbin 10 is fitted and attached to the outside of the pipe portion 2 b, and an electromagnetic coil 8 is wound around the bobbin 10, and the bobbin 10 is accommodated inside the housing 9. A lead wire 17 is connected to the bobbin 10 via a terminal (not shown), and the electromagnetic coil 8 is energized via the lead wire 17.

  The valve body 3 is formed in a cylindrical shape with brass or the like, has an inverted conical valve portion 3a at the lower end, and an upper small-diameter portion 3b is caulked and fixed to the plunger 6 (caulking portion 3c). The valve body 3 moves in the vertical direction together with the plunger 6, and the flow of the fluid from the inflow pipe 12 to the outflow pipe 13 is controlled by the valve portion 3 a coming into contact with and separating from the valve seat 4 c of the valve seat member 4. .

  The valve seat member 4 is formed by press working using a material such as stainless steel, has a cylindrical seat body 4a on the same central axis as the valve body 2, and a valve seat on the upper end of the seat body 4a. 4c is formed. A pipe fitting portion 4b is formed at the lower end of the sheet main body 4a via a stepped portion, and a flange portion 4d projecting outward is formed at an end edge of the pipe fitting portion 4b. The valve seat member 4 is mounted so as to cover the lower opening of the valve chamber 2a of the valve body 2, and the flange portion 4d is fixed to the lower end portion of the valve chamber 2a by welding (welded portion 14). The upper end portion of the outflow pipe 13 is inserted into the pipe fitting portion 4b of the valve seat member 4 and welded by brazing.

  As shown in FIG. 3, a bent portion 4e bent downward is formed at the end of the flange portion 4d. Also, a bent portion 2e bent downward is formed in the flange portion 2d of the valve body 2, and the bent portion 2e of the valve body 2 and the bent portion 4e of the valve seat member 4 are overlapped with each other, The ends of 2e and 4e are welded together (welded portion 14).

  By closing the opening end of the valve body 2 with the valve seat member 4 as described above, the bent portion 2e of the valve body 2 and the bent portion 4e of the valve seat sheet member 4 are shown in FIG. ), The bent portion 2e of the valve body 2 functions as a guide for the bent portion 4e of the valve seat member 4, and the deviation of the bent portion 4e in the left-right direction can be suppressed. .

  Further, as shown in FIG. 3 (b), even after welding, the flange portion 2d of the valve body 2 and the flange portion 4d of the valve seat member 4 are in contact with each other with a length of b, so that sufficient bonding is achieved. The length can be secured, and the flange portion 4d and the bent portion 4e of the valve seat member 4 can be prevented from being inclined in a direction away from each other.

  The plunger 6 is formed in a cylindrical shape from a magnetic material, and is disposed on the pipe portion 2b of the valve body 2 so as to be movable in the vertical direction. A fixing hole 6a for fixing the valve body 3 is formed in the central portion of the plunger 6 in the vertical direction, and the small diameter portion 3b of the valve body 3 is fitted into the fixing hole 6a from below, as described above. The plunger 6 and the valve body 3 are integrated.

  The guide member 7 is formed by press working using a plate material such as stainless steel, and is caulked and fixed to the ceiling portion of the valve chamber 2 a of the valve body 2. As shown in FIG. 4, the guide member 7 has a plurality of pressure equalizing holes 7 c and an insertion hole 7 d through which the valve body 3 is inserted in an inverted dish-like portion 7 a that opens below the guide member 7. . A cylindrical guide portion 7b for guiding the valve body 3 is erected upward from the central portion of the inverted dish-like portion 7a. Further, when the guide member 7 is caulked and fixed to the valve chamber 2a, the portion of the inverted dish-shaped portion 7a facing the inflow tube 12 does not interfere with the inflow tube 12 when the guide member 7 is inserted into the valve chamber 2a. Further, it is cut out so that the fluid flows smoothly (cutout portion 7e).

  The coil spring 11 as an urging means is disposed between the plunger 6 and the guide member 7 outside the valve body 3, and the plunger 6 is always separated from the guide member 7 by the urging force of the coil spring 11. Be energized. In addition, the lower end part of the plunger 6 is formed in the bottomed cylindrical shape, and the coil spring 11 is accommodated in the inside. When the coil spring 11 is disposed on the outer peripheral side of the plunger 6, the space between the pipe portion 2 b of the valve body 2 and the plunger 6 becomes large, and the suction force of the plunger 6 by the electromagnetic coil 8 decreases. However, in this embodiment, such a problem does not occur.

  Next, the operation of the electromagnetic valve 1 having the above configuration will be described with reference to FIGS.

  FIG. 1 shows a state in which the energization of the electromagnetic coil 8 is interrupted. In this state, no magnetic force is generated by the electromagnetic coil 8, and the plunger 6 is positioned at the upper end in the direction opposite to the guide member 7 by the biasing force of the coil spring 11. The valve portion 3a of the valve body 3 is in an open state separated from the valve seat 4c of the valve seat member 4, and fluid flows from the inlet pipe 12 to the inside of the valve chamber 2a, the valve seat member 4 It can flow into the outflow pipe 13 through the interior of the sheet body 4a.

  When the electromagnetic coil 8 is energized from the state of FIG. 1, a magnetic force is generated in the electromagnetic coil 8, and a magnetic path is formed in the housing 9 and the plunger 6 made of a magnetic material, and the plunger 6 is attracted downward. As a result, the plunger 6 moves downward while resisting the biasing force of the coil spring 11 inside the pipe portion 2b of the valve body 2, and at the same time, the plunger 3 is guided by the guide portion 7b of the guide member 7. 6 moves downward toward the valve seat 4 c of the valve seat member 4, and the valve portion 3 a of the valve body 3 is in a close valve state in close contact with the valve seat 4 c of the valve seat member 4 as shown in FIG. 2. The valve body 3 blocks the flow of fluid from the inflow pipe 12 to the outflow pipe 13.

  As described above, according to the present embodiment, the guide member 7 is formed by pressing in the axial direction of the valve body 3 while the plunger 6 is elongated in the axial direction of the valve body 3, thereby The magnetic path generated by 8 is constituted only by the housing 9 and the plunger 6. Therefore, the number of gaps formed in the magnetic path is reduced and the magnetic efficiency is improved as compared with the conventional one. Therefore, the electromagnetic coil 8 can be miniaturized, the power consumption and the manufacturing cost can be kept low, and the weight can be reduced. Can be

  Moreover, since the pressure equalizing hole 7c which connects the inside of the valve chamber 2a of the valve main body 2 and the internal space of the pipe part 2b in which the plunger 6 etc. are accommodated in the guide member 7 is provided, the plunger 6 and the guide member 7 are provided. The internal pressure of the valve chamber 2a is equal to the internal pressure of the pipe portion 2b, and the responsiveness when the solenoid valve 1 is opened and closed is improved.

  In the above-described embodiment, the plunger is energized in the valve opening direction when it is not energized to open, and when energized, the plunger moves in the valve opening direction and closes as an example. The invention can also be applied to an electromagnetic valve that closes by energizing the plunger in the valve closing direction when not energized and moves the valve in the valve opening direction when energized.

  The present invention can also be applied to control valves other than electromagnetic valves (for example, electric valves that control the flow rate with a stepping motor).

DESCRIPTION OF SYMBOLS 1 Solenoid valve 2 Valve main body 2a Valve chamber 2b Pipe part 2c Locking recessed part 2d Flange part 2e Bending part 3 Valve body 3a Valve part 3b Small diameter part 3c Caulking part 4 Valve seat sheet member 4a Sheet main body 4b Pipe fitting part 4c Valve seat 4d Flange part 4e Bent part 6 Plunger 6a Fixing hole 7 Guide member 7a Reverse dish part 7b Guide part 7c Pressure equalizing hole 8 Electromagnetic coil (drive means)
9 Housing 9a Upper wall 9b Lower wall 9c Protrusion 10 Bobbin 11 Coil spring 12 Inflow pipe 13 Outflow pipe 14 Welding portion 16 Press locking member 16a Protrusion 17 Lead wire

Claims (2)

Have a valve chamber, it possesses a valve body which is formed by pressing a valve body having a valve portion disposed in said valve chamber, said valve portion is a valve seat approaching and moving away from, which is formed by pressing A control valve comprising a valve seat member and drive means for driving the valve body in a valve opening direction and / or a valve closing direction;
The bent portions provided at the flange portion of the opening end of the valve body and the bent portions provided at the flange portion of the valve seat member are overlapped with each other, and the ends of the bent portions are welded to each other. A control valve comprising a joined joint. Bent portion of the valve seat sheet member, the control valve according to claim 1, characterized in that arranged inside the bent portion of the valve body.

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