JP6546085B2 - 2 stations solenoid valve - Google Patents

Description

  The present invention relates to a dual electromagnetic valve having two valve bodies used in a combustion apparatus or the like.

  Conventionally, as this type of dual electromagnetic valve, first and second valve bodies, first and second movable iron cores each having the first and second valve bodies connected to one end, and an opening at one end The first and second guide cylinders into which the first and second movable iron cores are slidably inserted from the end, and the other ends of the first and second guide cylinders are the first and second guide cylinders. The first and second fixed iron cores disposed to face each movable iron core, and the first and second movable iron cores are biased in a direction away from the first and second fixed iron cores. To connect one end of the first and second guide cylinders with a first frame made of a magnetic material disposed so as to connect the first and second valve springs and the first and second fixed iron cores. And a single solenoid arranged to surround one of the first guide cylinder and the second guide cylinder, and the first movable iron core and the first fixed iron core A magnetic path returning to the first movable core via the first frame, the second fixed core, the second movable core, and the second frame is configured, and the first and second movable cores are first Are moved toward the first and second fixed iron cores against the biasing force of the second and second valve springs so that the switching operation of the first and second valve bodies is performed. Are known (see, for example, Patent Document 1).

  In this case, the first and second two valve bodies can be switched by a single solenoid. Therefore, miniaturization and power saving can be achieved as compared with those using two solenoid valves each having a solenoid.

  By the way, in the thing of patent document 1, the holder made from nonmagnetic material which mounts and fixes a 2nd frame is provided, and the 1st and 2nd frames are separated by fastening a 1st frame to this holder. In order not to do so, we have assembled a two-stage solenoid valve. Further, although not described in Patent Document 1, a side plate portion extending to the other frame side is provided at an end portion of one of the first and second frames, and an outer surface of the other frame (one A connecting plate made of a nonmagnetic material overlapping the surface opposite to the surface facing the frame), and caulking the end of the side plate portion to the end of the connecting plate projecting from the other frame; It is also known in the prior art to assemble a double solenoid valve so that the two frames do not separate.

  Here, the reason why the holder and the connecting plate are made of nonmagnetic material is that magnetic flux flows between the first and second frames in a short circuit manner through the holder and the connecting plate, and the formation of the magnetic path is hindered. In order to prevent However, the holder and the connecting plate require mechanical strength and can not be made of thin plates. And making such a holder and a connecting plate out of nonmagnetic material increases the material cost and causes an increase in cost.

Japanese Patent Application Laid-Open No. 63-130977

  The present invention, in view of the above points, is a dual solenoid valve in which two valve bodies can be switched and operated by a single solenoid, and magnetic flux flows in a short circuit manner between the first and second frames. It is an object of the present invention to provide a device which can prevent such problems without using nonmagnetic material parts which require strength.

  In order to solve the above problems, the present invention provides first and second valve bodies, first and second movable iron cores each having the first and second valve bodies connected to one end, and one end The first and second guide cylinders into which the first and second movable iron cores are slidably inserted from the open end, and the other ends of the first and second guide cylinders have the first and second guide cylinders. Biasing the first and second fixed iron cores disposed to face the respective movable iron cores and the first and second movable iron cores in a direction away from the first and second fixed iron cores A first frame made of a magnetic material disposed so as to connect the first and second valve springs and the first and second fixed iron cores, and one end of the first and second guide cylinders are connected. And a single solenoid arranged to surround one of the first guide cylinder and the second guide cylinder, the first fixed iron from the first movable iron core The first magnetic core is configured to return to the first movable core via the first frame, the second fixed core, the second movable core, and the second frame, and when the solenoid is energized, the first and second movable cores are configured. The suction movement of the first and second fixed iron cores is performed against the biasing force of the first and second valve springs so that the switching operation of the first and second valve bodies is performed. In the double-loop solenoid valve, a side plate portion extending to the other frame side is provided at an end of one of the first and second frames, and a tip of the side plate portion is overlapped with the other frame Is formed on the other side of the other frame as the outer surface, and the overlapping portion is overlapped on the outer surface of the other frame via a plate made of nonmagnetic material. It features.

  According to the present invention, the double solenoid valve can be assembled so that the two frames do not separate by superposing the overlapping portion bent at the end of the side plate portion of one frame on the outer surface of the other frame. And the member interposed between the overlapping part and the other frame does not require strength. Therefore, in order to prevent the magnetic flux from flowing in a short circuit manner between both frames, a plate made of nonmagnetic material interposed between the overlapping portion and the other frame is used as a thin plate at a low material cost to reduce the cost. be able to.

BRIEF DESCRIPTION OF THE DRAWINGS The cutting side view of the 2 series electromagnetic valve of embodiment of this invention. The perspective view which abbreviate | omitted the valve housing of the 2 series electromagnetic valve of embodiment. The graph which shows the change by the plate | board thickness of the nonmagnetic material board | plate material of the applied voltage to the solenoid required to switch both the 1st and 2nd valve body.

1 and 2 show a dual electromagnetic valve according to an embodiment of the present invention, which is provided in a gas supply passage to a burner. The twin solenoid valve includes a first and second respective valve body 2 _1, 2 ₂ housed in the valve housing 1, first and second respective valve body 2 _1, 2 ₂ one end (in FIG. 1 first and second respective movable iron core 3 _1, 3 ₂ linked to the lower end), the respective movable core 3 ₁ from the open end 4a of the first and second _end, 3 ₂ is slidably inserted first and second respective guide tube ₄ 1, ₄ and _2, the first and first and second respective movable iron core to a second respective guide tube ₄ 1, _{4 2} of the other end portion (upper end portion in FIG. 1) 3 _{1, 3 2} first arranged so as to face the a second respective fixed core ₅ 1, _{5 2,} first and one second each movable iron core _{3, 3 2} of the first and second and a first 1 and _{6 2} second valves springs ₆ for urging in the direction away from the fixed core ₅ 1, _{5 2.}

Twin solenoid valve further includes first and second and two fixed iron core 5 _1, 5 ₂ first frame 7 ₁ arranged made of a magnetic material so as to connect the first and second both guide tube 4 _1, 4 ₂ of the one end portion and the second frame 7 ₂ made of a magnetic material and disposed so as to connect the (lower end in FIG. 1), one (the first guide tube 4 ₁ and the second guide tube 4 ₂ In the embodiment, a single solenoid 8 disposed to surround the first guide cylinder 4 ₁ ) is provided. Then, as shown by the one-dot chain line in FIG. 1, the first movable iron core _{3 1} first stationary iron core _{5 1} and the first frame ₇₁ and the second fixed core _{5 2} second movable iron core _{3 2} second frame 7 ₂ and the magnetic path H to return to the first movable iron core 3 ₁ via is to be configured.

The first and the stationary iron core 5 _1, 5 ₂ of the second is fixed to the first frame ₇₁ by caulking by inserting the protruding portions 5a projecting from the other end to the first frame 7 ₁ . Further, the first other end portion of the movable iron core 3 _1, cushioning member 3a is provided for absorbing the impact when the said moving core 3 ₁ comes into contact with the first stationary core 5 _1. First and second in each guide tube ₄ 1, _{4 2,} intermediate the upper and lower pair of sandwiching the spring 41 collar 42 is fitted.

The valve housing 1 has an inlet 11 and an outlet 12. The valve housing 1, always communicates with the inlet 11, the housing and the first valve chamber 13 ₁ for accommodating the first valve body 2 ₁ always communicates with the outlet port 12, the second valve body 2 ₂ and second valve chamber 13 ₂ is arranged to be connected in series via the intermediate communication passage 14. Moreover, facing the first and second respective valve chamber ₁₃ 1, 13 ₂ of the lower, first and second respective valve body ₂ 1, _{2 2} be seated, the first and second of each First and second valve seats 15 ₁ and 15 ₂ are provided to separate the valve chambers 13 ₁ and 13 ₂ from the communication passage 14. Then, when the first valve body _{2 1} is separated from the first valve seat 14 _1, through the first valve chamber 13 ₁ and the communication passage 14 is communicated, the second valve body _{2 2} from the second valve seat 14 ₂ by separation, the communication passage 14 and the second valve chamber 13 ₂ is so as to communicate. The first and second Ryobenshitsu ₁₃ 1, 13 ₂ of the top surface is closed by a cover plate 16 to be mounted on the upper surface of the valve housing 1.

During non-energization of the solenoid 8, the first and ₁ second valves springs _6, 6 in the _second biasing force the first and second respective valve body 2 _1, 2 ₂ are first and second valves seated on the seat ₁₅ 1, 15 _2, gas flow path between the inlet 11 and the outlet 12 is interrupted double in the first valve body _{2 1} and the second valve body _{2 2,} from the burner The redundancy of gas leak prevention is secured. Then, when energization of the solenoid 8, the first and second respective movable iron core 3 _1, 3 ₂ first and the first against the second urging force of the valve spring 6 _and 62 second It is sucked moved toward the fixed iron core ₅ 1, _{5 2,} opening the first and second respective valve body ₂ 1, _{2 2} are spaced apart from the first and second respective valve seats ₁₅ 1, 15 ₂ Switching to the side, the gas flow path is opened and gas is supplied to the burner. The first valve spring ₆₁ is interposed between the cover plate 16 and the first valve body _{2 1,} second valve spring _{6 2,} the second movable iron core _{3 2} and the second fixed core _{5 2} Is interposed between

The magnetic order path H is configured, the valve bodies 2 ₁ with a single solenoid 8 first and second of the first and the second two movable iron core 3 _1, 3 ₂ successively through the _{two 2} Can be switched. Therefore, miniaturization and power saving can be achieved as compared with those using two solenoid valves each having a solenoid.

Further, in the present embodiment, the both ends of the second frame 7 _2, the side plate portions 71 extending in the first frame ₇₁ side (upper side) is provided, at the tip (upper end) of each side plate portion 71, the first frame 7 ₁ The overlapping portion 72 is curved. Then, the first frame ₇₁ of the second frame 7 ₂ surface facing the as the outer surface of the surface on the opposite side (upper surface), by superimposing the overlapping portions 72 in the first frame ₇₁ of the outer surface, the 1 and the second of the two frames 7 _1, 7 ₂ is to avoid separation, it is assembled twin solenoid valve by fastening the cover plate 16 with mounting holes 7a forming the second frame 7 ₂ thereto.

However, the superimposed direct each overlap portion 72 to the first frame ₇₁ of the outer surface, the magnetic flux in both the first and second frames 7 _1, 7 between ₂ flows through the short circuit, the formation of the magnetic path H This makes it difficult to switch the _first and second valve bodies 2 ₁ and 2 ₂ by a single solenoid 8. Therefore, in this embodiment, the non-magnetic material to the first frame ₇₁ of the outer surface (magnetic permeability comparable material and air) by attaching a plate material 9 made of, the overlap portion 72 is in the first frame 7 ₁ It is made to overlap on the outer surface via the board | plate material 9. As shown in FIG. Examples of nonmagnetic materials include copper (relative magnetic permeability 0.999991) and lead (relative magnetic permeability 0.999983). Aluminum (relative magnetic permeability 1.00002) is advantageous in cost. Further, in this embodiment, it is provided with the plate member 9 substantially over the entire surface of the first frame ₇₁ of the outer surface, providing a plate material 9 only in a portion opposed to the overlap portion 72 of the first frame ₇₁ of the outer surface It is also possible. Note that the overlapping portions 72, escape holes 72a are formed for the caulking portion of the first and second respective fixed core 5 _1, 5 ₂ of the protruding portion 5a.

By changing the thickness of the aluminum plate 9, an experiment was conducted to examine the applied voltage of the solenoid 8 required a second valve body 2 ₂ In addition to the first valve body 2 ₁ to cause opening operation. In the experiment, one solenoid 8 of TeikakuOkoshi force 800AT, those strokes 4mm at first the movable iron core _{3 1} diameter 7.86Mm those strokes 0.7mm in the second movable iron core _{3 2} diameter 7.86Mm, the closing under load 105gf a valve spring _61, one of the valve opening time of the load 136Gf, second valve spring _{6 2} the closing force at 18 gf, those open at load 30 gf, the first and second frames 7 _The double solenoid valve of the said embodiment which used the ₁ and 72 _2nd of board thickness 1.6 mm was used. The applied voltage of the solenoid 8 required to switch operation to the second valve body 2 ₂ open side in addition to the first valve body 2 ₁ was changed as shown in FIG. 3 by the thickness of the plate 9. As apparent from FIG. 3, if the plate thickness of about 0.5mm of the plate 9, it is possible to sufficiently lower the voltage applied to the solenoid 8 required a second valve body 2 ₂ to cause opening operation.

Here, members interposed between the overlapping portions 72 and the first frame ₇₁ does not require strength. Thus, non-magnetic material interposed between the mating portion 72 and the first frame ₇₁ overlapping to the magnetic flux in both the first and second frames 7 _1, 7 between ₂ is prevented from flowing shortsighted The cost reduction can be achieved by using the plate material 9 of the above as a thin plate having a thickness of about 0.5 mm, which is inexpensive for material cost.

As mentioned above, although embodiment of this invention was described with reference to drawings, this invention is not limited to this. For example, in the above embodiment, it is provided with the side plate portions 71, 71 extending to the first frame ₇₁ side to the opposite ends of the second frame 7 _2, provided the side plate portion 71 only in the second frame 7 ₂ one end It is also possible. Further, by providing the side plate portion extending to the second frame 7 ₂ side end of the first frame ₇₁ are superimposed over the plate material made of non-magnetic material to the second frame 7 ₂ of the outer surface at the tip of the side plate portion It is also possible to bend the overlapping portion.

2 ₁ ... 1st valve body, 2 ₂ ... 2nd valve body, 3 ₁ ... 1st movable core, 3 ₂ ... 2nd movable core, 4 ₁ ... 1st guide cylinder, 4 ₂ ... 2nd guide cylinder, 4a ... Opening end, 5 ₁ ... 1st fixed core, 5 ₂ ... 2nd fixed core, 6 ₁ ... 1st valve spring, 6 ₂ ... 2nd valve spring, 7 ₁ ... 1st frame, 7 ₂ ... 2nd frame, 71 ... side plate portion, 72 ... overlapping portion, 8 ... solenoid, 9 ... plate member, H ... magnetic passage.

Claims (1)

First and second movable iron cores connecting the first and second valve bodies, and the first and second valve bodies connected to one end, and the first and second movable iron cores from the open end of the one end The first and second guide cylinders slidably inserted in the first and second guide cylinders, and the other ends of the first and second guide cylinders are disposed to face the first and second movable iron cores. First and second fixed iron cores, and first and second valve springs biasing the first and second movable iron cores in a direction away from the first and second fixed iron cores; A first frame made of a magnetic material disposed so as to connect the first and second fixed iron cores and a second frame made of a magnetic material disposed so as to connect one end of the first and second guide cylinders And a single solenoid disposed so as to surround one of the first guide cylinder and the second guide cylinder, and from the first movable iron core to the first fixed iron core, the first frame, the second fixed iron core, and the second fixed iron core. A magnetic path is formed to return to the first movable core via the moving iron core and the second frame, and when the solenoid is energized, the first and second movable iron cores are biased by the first and second valve springs. In the dual electromagnetic valve in which the suction movement of the first and second fixed iron cores against the first and second fixed iron cores is performed to cause the switching operation of the first and second valve bodies to be performed,
A side plate portion extending to the other frame side is provided at an end of one frame of both the first and second frames, and an overlapping portion for the other frame is bent at the tip of the side plate portion. The double solenoid valve is characterized in that the overlapping portion is overlapped on the outer surface of the other frame through a plate made of a nonmagnetic material, with the surface opposite to the surface facing the one frame of the frames as the outer surface. .

Images