JP7355433B2 - solenoid valve - Google Patents

Description

The technology disclosed in the present application relates to a solenoid valve, and particularly to a dual solenoid valve having two valve bodies used in a combustion device or the like.

2. Description of the Related Art Conventionally, a dual electromagnetic valve that opens and closes two movable valves (hereinafter referred to as "first and second") using a single electromagnetic solenoid has been disclosed in Patent Document 1 and the like.

Patent Document 1 discloses first and second movable valves, first and second plungers connected to one end of each of the first and second movable valves, and a plunger that connects the first and second movable valves to one end, and a first plunger that connects the first and second movable valves to one end. and a second guide cylinder into which the respective plungers are slidably inserted; the first and second fixed cores arranged as shown in FIG. a frame made of a ferromagnetic material arranged to connect both the first and second fixed iron cores, and a spacer made of a magnetic material arranged so as to connect one end of both the first and second guide cylinders; A single electromagnetic solenoid is arranged to surround one of the first guide tube and the second guide tube, and the first plunger is connected to the first fixed iron core, the ferromagnetic material frame, and the second guide tube. A magnetic path returns to the first plunger via the fixed iron core, the second plunger, and a spacer made of magnetic material, and when the electromagnetic solenoid is energized, each of the first and second plungers There is a disclosure of a dual solenoid valve that is attracted and moved toward each of the first and second fixed cores against the biasing force of each spring.

Japanese Unexamined Patent Publication No. 130977/1983

In the dual solenoid valve described in Patent Document 1, a holder made of a non-magnetic material is provided for mounting and fixing a spacer made of a magnetic material, and a frame made of a ferromagnetic material is fastened to this holder, so that the frame made of a ferromagnetic material and the frame made of a ferromagnetic material are connected. Two solenoid valves are assembled to prevent the magnetic spacer from separating. Here, the reason why the holder is made of a non-magnetic material is that magnetic flux flows between the ferromagnetic frame and the magnetic spacer in a short-circuit manner through the holder, which obstructs the formation of the magnetic path. This is to prevent By attaching the ferromagnetic frame to the holder so as to press both the first and second fixed cores, the fixed core, spring, and The guide tube etc. are properly fixed.

However, the above-mentioned holder requires mechanical strength, and the use of such a holder molded from a non-magnetic material increases the material cost, resulting in an increase in cost.

The technology disclosed in the present application has been proposed in view of the above-mentioned problems, and aims to provide a dual solenoid valve that does not require the above-mentioned holder.

In order to achieve the above object, the dual solenoid valve according to claim 1 includes first and second valve bodies, and first and second valve bodies made of a magnetic material, each of which is connected to one end thereof. each of the first and second plungers made of a non-magnetic material into which each of the first and second plungers is slidably inserted from an open end of one end; First and second fixed cores are arranged at the other end of the guide cylinder to face the first and second plungers, and the first and second plungers are connected to the first and second fixed cores. first and second biasing members that bias the fixed core in a direction away from the fixed core; a first plate made of a magnetic material arranged to connect both the first and second fixed cores; and a second plate made of a magnetic material arranged to connect one end of both the second guide cylinders, and a second plate arranged to surround either the first guide cylinder or the second guide cylinder. a single solenoid, and an exterior cover made of a non-magnetic material that covers at least the first plate, and includes a single solenoid that extends from the first plunger to the first fixed core, the first plate, the second fixed core, and the second fixed core. A magnetic path returns to the first plunger via the plunger and the second plate, and energization of a single solenoid causes each of the first and second plungers to be energized to the first and second positions. A double electromagnetic device is sucked and moved toward each of the first and second fixed iron cores against the biasing force of the member to perform valve opening/closing operations of each of the first and second valve bodies. In the valve, the exterior cover is provided with a biasing portion formed by processing a part of the exterior cover into a spring shape, which presses the first plate toward the first fixed iron core when the exterior cover is assembled. It is characterized by

A double solenoid valve according to a second aspect of the present invention is a double solenoid valve according to the first aspect, which has a cylindrical shape and is made of a magnetic material, the lower end of which is in contact with the second plate and which is inserted into the first guide cylinder. A second collar having a cylindrical shape and made of a magnetic material, the lower end of which is in contact with the second plate and which is externally inserted into the second guide cylinder.

A double solenoid valve according to a third aspect of the present invention is a double solenoid valve according to a second aspect, in which the first fixed core is arranged such that the upper end of the first fixed core is connected to the first plate before the upper end of the solenoid. The first collar is set so that there is a gap between the upper end of the solenoid and the first plate when the outer cover is assembled. The solenoid is solenoid that the solenoid contacts the second plate before the solenoid, and is set so that a gap is created between the lower end of the solenoid and the second plate when the outer cover is assembled. .

A dual solenoid valve according to claim 4 is the dual solenoid valve according to any one of claims 1 to 3, in which the urging portion provided on the exterior cover is arranged above the first plate. It is characterized by a cantilevered leaf spring formed by cutting out a horizontally long U-shape in the top plate of the exterior cover .

In the dual solenoid valve according to claim 1, when the exterior cover is attached, the urging portion formed on the exterior cover presses the first plate, and the first plate moves from the first plate to the second plate. The stationary core, solenoid, biasing member, etc. incorporated during the process can be pressed and maintained properly fixed.

Normally, solenoid valves (including dual solenoid valves) are often covered with an exterior part (cover) made of a non-magnetic material. The present invention provides a biasing portion of the exterior cover that is formed by processing a part of the exterior cover into a spring shape in the exterior cover that covers at least the first plate. presses the first plate to bring the first plate and the first fixed iron core into close contact with each other, and the parts between the first plate and the second plate are fixedly held. Therefore, the holder disclosed in Patent Document 1 and the like is not required, and costs can be reduced. In addition, as described above, the first plate and the first fixed iron core are brought into close contact with each other by the urging force of the urging portion of the exterior cover, and the parts between the first plate and the second plate are also brought into close contact with each other. Since it can be held, malfunctions of the electromagnetic valve caused by gaps between the first plate and the first fixed iron core or between other parts can be prevented.

In the dual solenoid valve according to claim 2, a first collar and a second collar made of a magnetic material are inserted into the first guide cylinder and the second guide cylinder, respectively, and the lower end portions of the first collar and the second collar are respectively inserted into the first guide cylinder and the second guide cylinder. By disposing it in contact with the second plate, the first plunger passes through the first fixed core, the first plate, the second fixed core, the second plunger, and the second plate. Since the magnetic pressure loss in the magnetic path returning to the plunger can be reduced, the valve-opening voltage applied to the coil 14 can be lowered, and the component cost of the coil 14 can be reduced.

In the dual solenoid valve according to claim 3, the first fixed iron core and the first By setting the shape of the collar, when assembling the exterior cover , the upper end of the first fixed iron core contacts the first plate before the upper end of the solenoid, and the lower end of the first collar contacts the second plate before the lower end of the solenoid. Therefore, the first fixed iron core and the first plate, and the first collar and the second plate can be held in close contact with each other. Therefore, magnetic loss caused by poor adhesion between the first fixed iron core and the first plate or between the first collar and the second plate can be effectively suppressed. .

In the dual solenoid valve according to claim 4, the urging portion of the exterior cover that presses the first plate is formed in a cantilever shape by cutting out a horizontally long U-shape in the top plate of the exterior cover. By using a leaf spring, it is possible to increase the efficiency of transmitting the urging force from the urging part of the exterior cover to internal parts such as the first fixed iron core from the first plate to the second plate, and to ensure that the stroke of the leaf spring is sufficient. By taking the dimensional tolerance of each internal component, it is possible to absorb the dimensional tolerance of each internal component. By providing the biasing portion of the exterior cover by molding in this way, it is possible to reduce manufacturing costs by eliminating the need for additional parts.

FIG. 1 is a cross-sectional view of a dual solenoid valve in a closed state according to an embodiment of the present invention. FIG. 1 is a cross-sectional view of a dual solenoid valve in an open state according to an embodiment of the present invention. (A) An enlarged view of the periphery of the first plate, and (B) an enlarged view of the periphery of the second plate. FIG. 2 is an exploded view of the upper part of a dual solenoid valve according to an embodiment of the present invention. It is a figure explaining the assembly of the cover of the dual solenoid valve which is one embodiment concerning the present invention. FIG. 2 is a top view (A) and a side view (B) of a cover of a dual electromagnetic valve according to an embodiment of the present invention. They are (A) a side perspective view and (B) an enlarged view of a peripheral portion of the biasing portion for explaining the action of the biasing portion of the exterior cover. It is an exploded view of the lower part of the dual solenoid valve which is one embodiment concerning the present invention. It is a figure showing the cover part of the dual electromagnetic valve which is another embodiment. 10 is a sectional view of a connector portion provided on the cover of the dual solenoid valve of FIG. 9. FIG.

First, a dual solenoid valve 1, which is an embodiment of the present invention, will be described with reference to the drawings.

1 and 2 show a dual solenoid valve 1 according to an embodiment of the present invention, which is installed in a gas supply path to a burner, etc., and FIG. 1 is a cross-sectional view of the valve in a closed state. 2 is a sectional view of the valve in the open state. The dual solenoid valve 1 includes a first valve body 21 and a second valve body 31 housed in a valve housing 10, a first plunger 17 that connects the first valve body 21 to one end (lower end in FIG. 1), and The second plunger 25 is connected to the second valve body 31 at one end (lower end in FIG. 1) via the second valve stem 30, and an opening is provided at one end (lower end in FIG. 1). The first guide tube 15 and the second guide tube 24 into which the plunger 17 and the second plunger 25 are slidably inserted, and the other end of the first guide tube 15 and the second guide tube 24 (the upper end in FIG. 1) The first fixed core 13 and the second fixed core 22 are arranged to face the first plunger 17 and the second plunger 25, and the first plunger 17 and the second plunger 25 are arranged to face the first fixed core 13 and the second plunger 25, respectively. It includes a first valve spring 19 and a second valve spring 23 that bias in a direction away from the second fixed iron core 22.

The dual solenoid valve 1 further includes a first plate 12 made of a magnetic material arranged to connect the first fixed iron core 13 and the second fixed iron core 22, and a first guide cylinder 15 and a second guide cylinder 24. A second plate 27 made of a magnetic material arranged to connect one end (lower end in FIG. 1), one of the first guide tube 15 and the second guide tube 24 (in this embodiment, the first guide tube 15 ). 1, the first plunger 17 passes through the first fixed core 13, the first plate 12, the second fixed core 22, the second plunger 25, and the second plate 27. 1. A magnetic path H returning to the plunger 17 is configured.

A protrusion 13a protruding from the other end (upper end in FIG. 1) of the first fixed iron core 13 is inserted into a through hole 12a provided in the first plate 12. In addition, the protrusion 22a protruding from the other end (upper end in FIG. 1) of the second fixed iron core 22 is inserted into the through hole 12b provided in the first plate 12 and caulked, so that the second fixed iron core 22 is fixed to the first plate 12. Furthermore, a buffer member 16 is provided at the other end of the first plunger 17 (upper end in FIG. 1) to absorb the impact when the first plunger 17 abuts on the first fixed iron core 13. Between the first guide tube 15 and the coil 14, a cylindrical first valve collar 18 made of a magnetic material is placed in contact with the second plate 27 with one end (the lower end in FIG. A cylindrical second valve collar 26 made of a magnetic material is fitted onto the second guide cylinder 24 and inserted into the cylinder 15 so that one end thereof (lower end in FIG. 1) abuts the second plate 27. It is inserted. Here, the first valve collar 18 and the second valve collar 26, which are fitted over the first guide cylinder 15 and the second guide cylinder 24, are effective in reducing the magnetic pressure loss of the magnetic passage H. Therefore, since the valve opening voltage applied to the coil 14 can be lowered, the component cost of the coil 14 can be reduced.

As described below, in the dual solenoid valve 1 according to the present invention, when the cover 11 is attached, the leaf spring 11a formed on the upper surface of the cover 11 presses the first plate 12 downward. Then, the first plate 12 presses the first fixed iron core 13, and the first plate 12 and the first fixed iron core 13 come into close contact with each other. Next, the first fixed iron core 13 presses the coil 14, and the first fixed iron core 13 and 14 come into close contact with each other, then the coil 14 presses the first valve collar 18 so that the coil 14 and the first valve collar 18 come into close contact with each other, and then the first valve collar 18 presses the second plate 27. Thus, the first valve collar 18 and the second plate 27 are brought into close contact. That is, when the cover 11 is attached, each component between the first plate 12 and the second plate 27 is fixed in close contact with each other due to the downward biasing force of the leaf spring 11a formed on the upper surface of the cover 11. Therefore, it is possible to prevent malfunctions in the operation of the dual solenoid valve 1 caused by gaps between the parts from the first plate 12 to the second plate 27.

3(A) is an enlarged view of the peripheral part of the first plate 12 shown in D1 of FIG. 2, and FIG. 3(B) is an enlarged view of the peripheral part of the second plate 27 shown in D2 of FIG. It is a diagram. As shown in FIGS. 3A and 3B, in the dual solenoid valve 1 according to the present invention, a gap (d1) exists between the first plate 12 and the coil 14, and the second plate 27 The shapes of the first fixed iron core 13 and the first valve collar 18 are set so that a gap (d2) is formed between the coil 14 and the coil 14. Therefore, the upper end of the first fixed iron core 13 contacts the first plate 12 before the upper end of the coil 14, and the lower end of the first valve collar 18 contacts the second plate 27 before the lower end of the coil 14. come into contact with Therefore, the first fixed iron core 13 and the first plate 12, and the first valve collar 18 and the second plate 27 can be held in close contact with each other as described above. Therefore, magnetic loss in the magnetic path H can be effectively suppressed.

The valve housing 10 has an inlet 34 and a flow path 35. Inside the valve housing 10, there is a first valve chamber 40 housing the first valve body 21, which is always in communication with the inflow port 34, and a first valve chamber 40 which is in communication with the flow passage 35 when the second valve body 31 is opened (not shown). A second valve chamber 41 that accommodates a second valve body 31 is arranged, communicating with a regulating valve or the like via a communication passage 42 . Further, a first valve seat 33 is provided so that the first valve body 21 can be seated facing the lower surface of the first valve chamber 40 and partitions the first valve chamber 40 and the flow path 35 . The second valve chamber 41 has a central portion of the lower surface that protrudes in the direction of the lower surface of the second valve chamber 41, can seat the second valve body 31 at the lower end, and partitions the second valve chamber 41 and the flow path 35. A second valve seat member 32 having a through hole 32a is disposed therein. The second valve seat member 32 is fixed at its upper end by being sandwiched between an intermediate member 29 disposed within the valve housing 10 and the valve housing 10 via the second valve seat member 37. The first valve body 21 is separated from the first valve seat 33, thereby communicating the first valve chamber 40 with the flow passage 35, and the second valve body 31 is separated from the second valve seat member 32, thereby communicating with the first valve chamber 40 and the flow passage 35. Through the through hole 32a, the flow passage 35 and the second valve chamber 41 and the communication passage 42 communicate with each other. The upper surfaces of the first valve chamber 40 and the second valve chamber 41 are closed by a second plate 27 attached to the upper surface of the valve housing 10 via a seal member 36.

When the coil 14 is not energized, the first valve body 21 is seated on the first valve seat 33 due to the urging force of the first valve spring 19, as shown in FIG. The second valve body 31 is seated on the second valve seat member 32 by the biasing force of the second valve spring 23, thereby blocking the flow path 35 and the communication path 42 that communicates with a regulating valve (not shown) or the like. , preventing fluid such as gas from flowing into the dual solenoid valve 1.

When the coil 14 is energized, as shown in FIG. 2, the first plunger 17 is attracted and moved toward the first fixed iron core 13 against the biasing force of the first valve spring 19, and the first valve body 21 is moved. The valve opens by moving away from the first valve seat 33, and fluid such as gas is supplied from the inlet 34 to the flow path 35 as shown by arrow (1). Further, the second plunger 25 is also attracted and moved toward the second fixed iron core 22 against the biasing force of the second valve spring 23 .

The second valve stem 30 , which has a second valve body 31 connected to its lower end, is biased toward the second plunger 25 by a second valve stem spring 28 . As shown in FIG. 1, when the coil 14 is not energized, the second plunger 25 moves downward due to the biasing force of the second valve spring 23 and comes into contact with the upper end surface of the second valve stem 30. , the second valve stem 30 moves downward together with the second plunger 25 against the biasing force of the second valve stem spring 28, and the second valve body 31 connected to the second valve stem 30 as described above moves downward. 2 is seated on the valve seat member 32. However, when the coil 14 is energized, the second plunger 25 attracts and moves toward the second fixed iron core 22 and the second valve stem 30 is released from the second plunger 25, as shown in FIG. The second valve stem 30 moves upward due to the biasing force of the second valve stem spring 28, and the second valve body 31 connected to the second valve stem 30 separates from the second valve seat member 32 and performs a valve opening operation, as shown by the arrow. As shown in (2), fluid such as gas is supplied from the flow passage 35 to a regulating valve (not shown) through the communication passage 42.

Note that the first valve spring 19 is interposed between the lower end of the first guide cylinder 15 and the first valve body receiver 20 disposed on the upper surface of the first valve body 21, and the second valve spring 23 is , is interposed between the second plunger 25 and the upper inner surface of the second guide cylinder 24, and the second valve stem spring 28 is interposed between the second valve stem 30 and the intermediate member 29.

As described above, since the continuous magnetic path H passing through the first plunger 17 and the second plunger 25 is configured, the first valve body 21 and the second valve body 31 are opened/closed by the single coil 14. It can be made to work. Therefore, compared to the case where two electromagnetic valves each having a coil are used, it is possible to achieve a reduction in size and power consumption.

Next, referring to FIGS. 4 to 8, parts from the first plate 12 to the second plate 27 are fixedly held by the plate spring 11a formed on the upper surface of the cover 11, which is a feature of the present invention. We will explain in detail how to do this. Note that the cover 11 is made of resin, which is a non-magnetic material.

FIG. 4 is an exploded view of a portion of the dual solenoid valve 1 from the first plate 12 to the second plate 27. As shown in FIG. 4, the second fixed iron core 22 has a protrusion 22a protruding from the upper end thereof inserted into a through hole 12b provided in the first plate 12 and then caulked to be fixedly held on the first plate 12. There is.

A protrusion 13a that protrudes upward is provided at the upper end of the first fixed iron core 13 for insertion into a through hole 12a provided in the first plate 12. Here, like the second fixed core 22, the first fixed core 13 is not caulked to the first plate 12 because both the first fixed core 13 and the second fixed core 22 are caulked in the same process. This is because space is required and new equipment needs to be added, which may result in higher manufacturing costs. Therefore, in the dual solenoid valve 1 of this embodiment, in order to reduce manufacturing costs, the protrusion 13a protruding from the upper end of the first fixed core 13 is inserted into the through hole 12a provided in the first plate 12. The crimping process is not performed. The first fixed core 13 is inserted into the upper opening 14a of the coil 14, and the first valve collar 18 is inserted into the lower opening 14b of the coil 14. The assembled state of the first plate 12, first fixed iron core 13, second fixed iron core 22, coil 14, and first valve collar 18 is placed on the second plate 27 (hereinafter, this assembled state is referred to as the "first assembly"). A).

FIG. 5 is a diagram illustrating how the cover 11 is assembled. As shown in FIG. 5, a cover 11 is attached to the first assembly A from above so as to cover the first assembly A.

6A is a top view of the cover 11, and FIG. 6B is a side view of the cover 11. An enlarged view of a portion surrounded by a chain double-dashed line circle E in FIG. 6A is shown in the upper right corner of the drawing in FIG. As shown in FIG. 6(A), the cover 11 is a cover that covers from the first plate 12 to the upper surface of the second plate 27 of the first assembly A, and the through holes 11f and 11g shown in FIG. It is assembled to the second plate 27 by inserting screws (not shown) and screwing.

As shown in FIG. 6A, three leaf springs 11a, 11a, 11a are formed on the upper surface of the cover 11 at intervals of about 120° with their tips facing downward. As shown in the enlarged view of the area surrounded by the two-dot chain line circle E shown in the upper right corner of the drawing in FIG. It is a cantilever-shaped leaf spring. In this embodiment, the stroke of the horizontally long U-shaped spring portion of the leaf spring 11a is long enough to absorb the dimensional tolerances of each component between the first plate 12 and the second plate 27. is set to . Further, the through hole 11d is provided as an escape hole for the protrusion 22a of the second fixed iron core 22 caulked to the first plate 12.

FIG. 7 is a diagram illustrating the action of the leaf spring 11a of the cover 11. FIG. 7(A) is a side perspective view of the cover 11 attached to the first assembly A, and FIG. 7(B) is an enlarged view of section C in FIG. 7(A).

As described above, when the cover 11 is assembled to the first assembly A, the tips of the three leaf springs 11a, 11a, 11a on the top surface of the cover 11 come into contact with the top surface end of the first plate 12, and then 1. The upper end of the plate 12 moves upward as shown by the arrow (1) in FIG. 7(B). The first plate 12 is urged downward by the downward (direction toward the first plate 12) urging force of the leaf springs 11a, 11a, 11a caused by the movement of the tips of the leaf springs 11a, 11a, 11a. Ru. As a result, the first plate 12 urges the first fixed core 13, the coil 14, and the first valve collar 18 disposed below the first plate 12, and between the first plate 12 and the first fixed core 13, The coil 14 and the first valve collar 18 and the first valve collar 18 and the second plate 27 are fixedly held in close contact with each other without any gaps. (referred to as “assembly B”).

FIG. 8 is an exploded view of the lower part of the dual solenoid valve 1 (assembled below the second plate 27). Below the second plate 27, as shown in FIG. ) The first plunger 17, the second guide cylinder 24, the second valve spring 23, the second plunger 25, the second valve stem 30, the second valve stem spring 28, and the second valve body 31 are attached to the valve housing 10 together with the assembly B. Can be assembled.

As described above, in the dual solenoid valve 1 which is an embodiment of the present invention, the first plate 12 is attached to the cover 11 made of resin (which is a non-magnetic material) and covers at least the first plate 12. By forming the biasing leaf springs 11a, 11a, 11a, parts such as the first fixed iron core 13 and the coil 14 arranged between the first plate 12 and the second plate 27 can be moved by attaching the cover 11. The parts can be fixed and held in close contact with each other, and the first plate 12 and the second plate 27 are separated, so that the first fixed core 13, the first plate 12, and the second fixed core 22 are separated from the first plunger 17. Since the magnetic path H returning to the first plunger 17 via the second plunger 25 and the second plate 27 can be configured, there is no need to use a holder made of a non-magnetic material as described in Patent Document 1, and therefore, manufacturing This makes it possible to reduce costs.

Here, the dual solenoid valve 1 is an example of a dual solenoid valve, the first valve body 21 is an example of a first valve body, the second valve body 31 is an example of a second valve body, The first plunger 17 is an example of a first plunger, the second plunger 25 is an example of a second plunger, the first guide tube 15 is an example of a first guide tube, and the second guide tube 24 is an example of a first plunger. This is an example of the second guide tube, the first fixed core 13 is an example of the first fixed core, the second fixed core 22 is an example of the second fixed core, and the first valve spring 19 is an example of the first fixed core. The second valve spring 23 is an example of a second biasing member, the first plate 12 is an example of a first plate, and the second plate 27 is an example of a second biasing member. The coil 14 is an example of a single solenoid, the cover 11 is an example of an exterior part, the leaf spring 11a is an example of a biasing part, and the first valve collar 18 is an example of a first collar. , and the second valve collar 26 is an example of a second collar.

Although the embodiments of the present invention have been described in detail above, these are merely illustrative, and the present invention is not to be construed in any way limited by the specific descriptions in such embodiments, and is The present invention may be implemented with various changes, modifications, improvements, etc. based on knowledge, and as long as such embodiments do not depart from the spirit of the present invention, they are all within the scope of the present invention. It should be understood that this includes:

For example, in the dual solenoid valve 1, in order to reduce the magnetic pressure loss of the magnetic passage H and lower the valve opening voltage to the coil 14, the first valve has one end (lower end in FIG. 1) in contact with the second plate 27. Although the collar 18 and the second valve collar 26 are inserted into the first guide cylinder 15 and the second guide cylinder 24, respectively, if the magnetic pressure loss of the magnetic passage H is not a problem, the first valve collar 18 and the second valve collar 26 are not necessarily inserted. There is no need to extrapolate a collar such as collar 26 onto the guide tube.

In addition, in the dual solenoid valve 1, the second fixed core 22 is held fixed to the first plate 12 by caulking, but this is because the first fixed core 13 is supported by the coil 14, while the second This is because there is nothing to support below the fixed iron core 22, and if it is configured to be supported like the first fixed iron core 13, it is not necessarily necessary to caulk. In that case, the protrusion 22a protruding from the upper end of the second fixed core 22 is inserted into the through hole 12b provided in the first plate 12, and the plate spring 11a is placed in the cover 11 at a position that corresponds to the upper surface of the second fixed core 22. By newly providing a leaf spring similar to the above, the second fixed iron core 22 may be fixedly held in close contact with the first plate 12 by the cover 11. In this case, since there is no caulking process, manufacturing costs can be reduced.

Furthermore, in the dual solenoid valve 1, for the second valve, the first valve body 21 is not directly connected to the first plunger 17 as in the first valve, but the second valve stem 30 is connected to the second plunger 25. The second valve body 31 is connected via. That is, unlike the first valve, the first plunger 17 and the first valve body 21 are not integrated, but the second plunger 25 and the second valve body 31 are separate bodies, and the second valve body is opened. At times, only the second plunger 25 is attracted and moved by energization of the coil 14, and the second valve body connected to the stem portion is opened by the biasing force of the second valve stem spring 28. The reason for this configuration is that the intermediate member 29 is involved when assembling the second valve, which makes assembly difficult, and that an excessive load is applied to the second valve body 31 when the second valve is opened. The reason is to prevent this. However, if these problems do not exist, the second valve may also have a second valve body directly connected to the second plunger, similar to the first valve.

FIG. 9 shows a portion of a cover 110 of a dual solenoid valve 100 according to another embodiment. The dual solenoid valve 100 includes a connector 120 having pins 120a, 120a, 120a connected to the coil 14, and a cover 110 and integrally molded therein. 9A is a top view, and FIG. 9B is a side view seen from the connector 120 side. This eliminates the need for a separate connector for connecting the coil 14, so parts costs can be reduced.

FIG. 10 is a cross-sectional view taken along line FF of the connector 120 portion in FIG. 9(A). As shown in FIG. 10, the connector 120 integrally molded with the cover 110 of the dual solenoid valve 100 is also formed with a pin support portion 120b that supports the pins 120a, 120a, 120a. By providing the pin support portion 120b, it is possible to prevent the pin 120a from deforming when a female connector (not shown) is attached to or detached from the connector 120.

1... Dual solenoid valve 10... Valve housing 11... Cover 11a... Leaf spring 12... First plate 13... First fixed core 14... Coil 15... First guide cylinder 17... First Plunger 18...First valve collar 19...First valve spring 21...First valve body 22...Second fixed core 23...Second valve spring 24...Second guide cylinder 25...Second plunger 26 ...Second valve collar 27...Second plate 28...Second valve stem spring 30...Second valve stem 31...Second valve body 32...Second valve seat member 33...First valve seat

Claims (4)

each of the first and second valve bodies;
first and second plungers made of a magnetic material, each of which is connected to one end of each of the first and second valve bodies;
first and second guide tubes made of a non-magnetic material, into which the first and second plungers are slidably inserted from one open end;
first and second fixed cores disposed at the other ends of the first and second guide cylinders so as to face the first and second plungers;
first and second biasing members that bias the first and second plungers in a direction away from the first and second fixed iron cores;
a first plate made of a magnetic material arranged to connect both the first and second fixed cores;
a second plate made of a magnetic material and arranged to connect one end of the first and second guide cylinders;
a single solenoid arranged to surround either the first guide cylinder or the second guide cylinder;
an exterior cover made of a non-magnetic material that covers at least the first plate;
Magnetism returns from the first plunger to the first plunger via the first fixed iron core, the first plate, the second fixed iron core, the second plunger, and the second plate. A passage is configured, and when the single solenoid is energized, the first and second plungers move against the biasing forces of the first and second biasing members. In a dual solenoid valve, the first and second valve bodies are moved by suction toward each of the fixed iron cores to open/close the first and second valve bodies,
The exterior cover is provided with a biasing portion formed by processing a part of the exterior cover into a spring shape, which presses the first plate toward the first fixed iron core when the exterior cover is assembled. A dual solenoid valve characterized by: a first collar having a cylindrical shape and made of a magnetic material, the lower end of which is in contact with the second plate and which is inserted into the first guide tube;
2. A second collar according to claim 1, further comprising a second collar having a cylindrical shape and made of a magnetic material, the lower end of which is in contact with the second plate and which is inserted into the second guide tube. Linked solenoid valve. The upper end of the first fixed iron core contacts the first plate before the upper end of the solenoid, and when the outer cover is assembled, the upper end of the first fixed iron core contacts the upper end of the solenoid. It is set so that there is a gap between it and the first plate,
The first collar is configured such that the lower end of the first collar contacts the second plate before the lower end of the solenoid, and when the exterior cover is assembled, the lower end of the solenoid and the second plate contact each other. 3. The dual solenoid valve according to claim 2, wherein the valve is set so that a gap is formed between the second plate and the second plate. The biasing portion provided on the exterior cover is a cantilever-shaped plate formed by cutting out a horizontally long U-shape in a top plate disposed above the first plate of the exterior cover . The dual solenoid valve according to any one of claims 1 to 3, characterized in that it is a spring.

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