JP2011226606A - Solenoid valve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a solenoid valve that not only eliminates the need for a special jig during brazing but also has no backlash between members even after brazing, thereby having excellent dimensional accuracy, in a solenoid valve formed by press-molding the respective members.SOLUTION: The solenoid valve is configured as follows. The solenoid valve has a valve-seat member 8 that is held to the side of a valve body 5 and controls a fluid channel between a first port and a second port in cooperation with a valve element 4. The valve body is a press-molded article. The first port is formed by a first pipe member 61. The second port is formed by a second pipe member 71. The valve-seat member is composed of an annular valve seat 81 in contact with the valve element, a cylindrical part 82 axially extending from the valve seat, an annular step 822 formed between the outer-peripheral surface 821 of the cylindrical part and the valve-seat member, and a caulking part 83 for fixing a first flange 51 and a second flange 711 in-between the annular step. The first flange is provided at one end of the valve body while extending to the radial inside. The second flange is provided at one end of the second pipe member while extending to the radial inside.

Description

The present invention relates to a solenoid valve.
The present invention also relates to an electromagnetic valve used as a component for a fuel cell, for example.

Furthermore, this invention relates to the solenoid valve used suitably for the direct acting valve for fuel cells.
The present invention also relates to an electromagnetic valve suitably used for a valve for controlling hydrogen gas used in a stationary fuel cell.

Conventionally, an electromagnetic valve as shown in Patent Document 1 is known.
In other words, this type of solenoid valve has a valve body made of cast metal and details are made by cutting.
For this reason, not only the processing cost becomes expensive, but also the problem that the weight of the whole solenoid valve must be increased.

Therefore, an electromagnetic valve shown in FIG. 4 has been proposed.
That is, this type of electromagnetic valve includes a coil 200 housed in the case 100, a plunger 300 that is magnetically attracted by the excited coil 200, a valve body 400 provided at one end of the plunger 300, and the case 100. A cylindrical valve body 500 fixed to one end, a first pipe member 610 forming a first port 600 held on the peripheral surface of the valve body 500, and held at one end of the valve body 500 The second pipe member 710 forming the second port 700 formed between the first port 600 and the second port 700 is held on the valve body 500 side and cooperates with the valve body 400. And a valve seat member 800 for controlling the flow path of the fluid.

  The valve body 500, the first tube member 610, and the second tube member 710 are formed by press-molding a circular stainless steel plate having a predetermined diameter and thickness.

  However, as shown in the figure, these press-molded product and valve seat member 800 must be brazed in a state where the end of the cylindrical member is simply abutted against, so that a special jig is used for brazing. Not only is necessary, but also there is a problem that looseness between members occurs even after brazing and dimensional accuracy is not achieved.

JP 11-22849 A JP 2007-56954 A

  The present invention has been made in view of the above-described problems, and each member is formed by press molding, and not only a special jig is not required for brazing, An object of the present invention is to provide a solenoid valve having good dimensional accuracy without loosening between members even after brazing.

The electromagnetic valve of the present invention includes a coil housed in a case, a plunger magnetically attracted by the excited coil, a valve body provided at one end of the plunger, and press molding fixed to one end of the case A tubular valve body that is a product, a first pipe member that is a press-formed product that forms a first port held on the peripheral surface of the valve body, and is held at one end of the valve body A second pipe member which is a press-formed product forming a second port; and is held on the valve body side, and cooperates with the valve body to form the first port and the second port. In a solenoid valve comprising a valve seat member for controlling a fluid flow path between
The valve seat member is formed between an annular valve seat portion that contacts the valve body, a cylindrical portion extending in the axial direction from the valve seat portion, and an outer peripheral surface of the cylindrical portion and the valve seat member. An annular stepped portion, a first flange portion extending radially inward provided at one end of the valve body, and a second flange portion extending radially inward provided at one end of the second pipe member It is comprised from the crimping part for fixing between the said annular step part.

The present invention has the following effects.
According to the solenoid valve of the first aspect of the invention, in the one formed by press molding each member, not only a special jig is not required for brazing, but also after brazing. There is no looseness between the members, and the dimensional accuracy is good.
According to the electromagnetic valve of the second aspect of the invention, since each press-molded product and the valve seat member can be reliably integrated, brazing can be performed reliably.

According to the electromagnetic valve of the third aspect of the present invention, the quick fastener can be applied at low cost and can be easily mounted.
According to the electromagnetic valve of the invention described in claim 4, since the valve main body and the pipe member can be fixed reliably and easily, there is no looseness between the members even after brazing and the dimensional accuracy is good.

  According to the electromagnetic valve of the fifth aspect of the present invention, the valve body can be stably brought into contact with the case, so that the valve body can be securely brazed to the case.

Sectional drawing of the solenoid valve which concerns on this invention. The partial expanded sectional view of FIG. The fragmentary sectional view which attached the pipe line with the quick fastener to the solenoid valve of FIG. Sectional drawing of the solenoid valve which concerns on a prior art.

The best mode for carrying out the present invention will be described below with reference to the drawings.
1 and 2, the electromagnetic valve according to the first aspect of the present invention includes a coil 2 housed in a case 1, a plunger 3 magnetically attracted by the excited coil 2, and one end of the plunger 3. A provided valve body 4, a cylindrical valve body 5 fixed to one end of the case 1, and a first pipe member 61 forming a first port 6 held on the peripheral surface of the valve body 5. , A second pipe member 71 forming a second port 7 held at one end of the valve body 5, and a first port 6 that is held on the valve body 5 side and cooperates with the valve body 4. And a valve seat member 8 for controlling a fluid flow path between the first port 7 and the second port 7.
The solenoid valve according to the first aspect of the present invention is closed when the valve body 4 and the valve seat member 8 are in contact with each other as shown in FIG.
When energized, the plunger 3 that is magnetically attracted by the excited coil 2 moves upward in the figure against the spring member 31 together with the valve body 4 to open the valve.
The normal fluid flows from the first port 6 side to the second port 7 side.

The valve body 5, the first tube member 61, and the second tube member 71 are formed by press-molding a circular stainless steel plate having a predetermined diameter and thickness.
Although these members can be press-formed from a steel material other than a stainless steel plate, it is preferable to use a stainless steel plate when used as an electromagnetic valve for a fuel cell.
The valve seat member 8 includes an annular valve seat portion 81 that contacts the valve body 4, a cylindrical portion 82 that extends in the axial direction from the valve seat portion 81, an outer peripheral surface 821 of the cylindrical portion 82, and the valve seat member 8. An annular step 822 formed between the valve body 5, a first flange 51 provided at one end of the valve body 5, and a radially inward provided at one end of the second pipe member 71. A caulking portion 83 for fixing the extending second flange portion 711 to the annular step portion 822 is configured.

This caulking is fixed after the first flange portion 51 and the second flange portion 711 are inserted through the outer peripheral surface 821 of the cylindrical portion 82, and then the end portion 823 of the cylindrical portion 82 opposite to the valve seat member 8 is fixed. This is performed by caulking and fixing between the annular step portion 822 and the caulking portion 83 formed by bending outward in the radial direction.
By this caulking, each press-molded product and the valve seat member 8 can be reliably integrated, so that brazing between these members can be performed reliably.
That is, when a fixing method such as press fitting is adopted, the brazing material cannot be infiltrated into the press fitting portion, and brazing becomes insufficient. However, in the case of caulking fixing according to the present invention, the pressure contact force between members can be adjusted. Since the brazing material can penetrate into the gap between the members, good brazing can be performed.

As shown in FIG. 3, the first tube member 61 is joined to the conduit 612 by the quick fastener 9, and a spring is wound around the outer peripheral surface of the first tube member 61. Sleeve means 91 is arranged.
As a result, compared with the conventional sleeve means 910 shown in FIG. 4, when applying a quick fastener, there is no need to invest in a mold, so that the cost can be reduced and the diameter can be increased during insertion, so mounting is easy. .
That is, since the quick fastener 9 is a standard part, its size and dimensions are limited.
On the other hand, the valve body 5, which is a press-formed product, the first pipe member 61, and the second pipe member 71 are manufactured with priority given to the inner diameter of the mating member to be connected. As shown in the prior art No. 4, sleeves with various thicknesses are fitted to adjust the dimensions of the outer diameter portion.
For this reason, the cost of the mold and the processing cost was high, but the sleeve means 91 of the present invention can adjust the dimensions of the outer diameter part by winding the spring, so that the cost of the mold and the processing cost can be greatly reduced. .
The sleeve means 91 can be similarly applied to the second pipe member 71 and can be used not only on the female side as shown in FIG. 3 but also on the male side of the pipe 612.

Further, the first pipe member 61 is formed on the outer peripheral surface of the first pipe member 61 and along the shape of the peripheral surface of the valve body 5, and the first pipe member 61 One end portion 614 in the axial direction extends into the valve main body 5, and the one end portion 614 is bent radially outward so that the valve main body 5 side is sandwiched by the bent portion of the protrusion 613 and the one end portion 614. The first tube member 61 is caulked and fixed to the valve body 5 side.
As a result, the valve main body 5 and the pipe member 61 can be fixed reliably and easily, so that there is no loosening between the members even after brazing and the dimensional accuracy is good.
This technique is also effectively used when connecting the valve bodies 5 and 5 of the respective solenoid valves with the ring member 61 when two solenoid valves are used together.

Further, the valve body 5 has an end portion 52 in contact with the case 1 as a third flange portion 53 extending radially outward.
As a result, the valve body 5 can be stably brought into contact with the case 1 side, compared with the case where the end portion 52 of the valve body 5 is simply brought into contact, so that the valve body 5 can be securely brazed to the case 1. .

  The solenoid valve according to the present invention is suitably used for applications in which the valve body requires corrosion resistance. For example, the solenoid valve is used for semiconductor devices used in clean rooms, devices using pure water, etc. The fastener concept can also be applied to piping for plumbing equipment, hot water supply, gas, and water equipment.

DESCRIPTION OF SYMBOLS 1 Case 2 Coil 3 Plunger 4 Valve body 5 Valve body 6 1st port 7 2nd port 8 Valve seat member 9 Quick fastener 51 1st flange part 52 End part 53 3rd flange part 61 1st pipe member 71 Second pipe member 91 Sleeve means

Claims (5)

A coil (2) housed in the case (1), a plunger (3) magnetically attracted by the excited coil (2), and a valve body (4) provided at one end of the plunger (3) A cylindrical valve body (5) which is a press-molded product fixed to one end of the case (1), and a first port (6) held on the peripheral surface of the valve body (5). The first pipe member (61), which is a press-formed product, and the second pipe, which is a press-formed product, that forms a second port (7) held at one end of the valve body (5) Fluid held between the first port (6) and the second port (7) in cooperation with the valve body (4), held on the member (71) and the valve body (5) side In an electromagnetic valve comprising a valve seat member (8) for controlling the flow path of
The valve seat member (8) has an annular valve seat portion (81) that comes into contact with the valve body (4), a cylindrical portion (82) extending in the axial direction from the valve seat portion (81), and the cylinder An annular step (822) formed between the outer peripheral surface (821) of the ring-shaped portion (82) and the valve seat member (8), and a radially inward provided at one end of the valve body (5). A first flange portion (51) that extends and a second flange portion (711) that extends radially inward provided at one end of the second pipe member (71) are connected to the annular step portion (822). An electromagnetic valve characterized by comprising a caulking portion (83) for fixing with a screw.   After the caulking and fixing, the first flange portion (51) and the second flange portion (711) are inserted through the outer peripheral surface (821) of the cylindrical portion (82), then the cylindrical portion (82). The end portion (823) on the opposite side of the valve seat member (8) is crimped to the annular step portion (822) by a caulking portion (83) formed by bending outward in the radial direction. The electromagnetic valve according to claim 1.   The pipe members (61) and (71) are joined to the pipe line (612) by a quick fastener (9), and springs are provided on the outer peripheral surfaces of the pipe members (61) and (71). 3. Solenoid valve according to claim 1 or 2, characterized in that a wound sleeve means (91) is used.   The first pipe member (61) is on the outer peripheral surface of the first pipe member (61), and has a projection (613) formed along the peripheral surface of the valve body (5), One end portion (614) of the first tube member (61) extends into the valve body (5), and the one end portion (614) is bent radially outward to thereby form the first tube member (61). The on-off valve according to any one of claims 1 to 3, wherein 61) is fixed by caulking to the valve body (5) side.   5. The valve body (5) according to any one of claims 1 to 4, wherein an end portion (52) in contact with the case (1) is a third flange portion (53) extending radially outward. The on-off valve according to one item.

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