JP2022115809A - Structure of silent type fuel gas solenoid valve - Google Patents

Abstract

To provide a structure of a silent type fuel gas solenoid valve.SOLUTION: A silent type fuel gas solenoid valve comprises a movable iron core, a fixed iron core, and a conduit, wherein the movable iron core is provided movably in the conduit, the fixed iron core is located inside the conduit, and partially protrudes into the movable iron core, and has its end part aligned with the movable iron core, and both are mutually spaced. A modified ring is provided between the fixed iron core and the conduit, and comprises a movable iron core part and a seal part, the movable iron core part faces the movable iron core and can come into contact with the movable iron core, and the seal part has its inner peripheral part locked inside the fixed iron core and its outer peripheral part brought into contact with the conduit to achieve sealing with the conduit. The outer peripheral part of the seal part is formed as a tapered structure. The structure of the fuel gas solenoid valve provides excellent buffering performance and the solenoid valve operates gently and precisely.SELECTED DRAWING: Figure 1

Description

The present invention relates to fuel gas valve technology, and more particularly to the structure of a silent fuel gas solenoid valve.

In the case of a silent fuel gas solenoid valve, the inner plug is generally made of high-quality rubber material in order to ensure excellent elasticity, cushioning, and noise reduction performance. For example, the rubber material used is required to: 1) The fuel gas resistance is excellent, and the expansion coefficient after immersion in n-pentane is low. 2) It has good high temperature resistance, and the amount of deformation is small even if it is repeatedly subjected to force after high temperature. However, such materials are relatively expensive in the market due to their high price. In addition, since a rubber inner plug is used in the movable iron core of the silent fuel gas solenoid valve, problems such as pressure distortion and insufficient pressure are likely to occur during press-fitting, and the performance and stability of the fuel gas solenoid valve are greatly affected. was relatively low.

In view of the above problems in the prior art, the present invention provides a silent fuel gas solenoid valve structure with one less inner plug, good cushioning properties, and a simple moving core structure and manufacturing process. .

The structure of the silent fuel gas solenoid valve of the present invention is
a movable iron core;
a fixed core;
a conduit;
with
The movable core is movably provided within the conduit,
The fixed core is installed in the conduit and partly extends to the movable core, and the ends of the fixed core are aligned with the movable core and are between the two. are spaced by
A deformed ring is provided between the fixed core and the conduit, the deformed ring includes a movable core portion and a seal portion, and the movable core portion faces the movable core and faces the movable core. The inner peripheral portion of the seal portion is engaged with the fixed iron core, and the outer peripheral portion of the seal portion is in contact with the conduit to realize sealing performance with the conduit.

In the structure of the silent fuel gas solenoid valve described above, the fixed iron core is provided with a locking groove for locking the deformed ring, and the inner peripheral portion of the seal portion is provided with the locking groove and has a gap between the groove wall of the remaining portion of the locking groove.

In the structure of the silent fuel gas solenoid valve described above, the deformed ring is provided with a ventilation groove facing the end surface of the movable iron core.

The structure of the above silent fuel gas solenoid valve further comprises a casing and a rubber pad, the conduit is installed in the casing, and one end of the movable core remote from the fixed core is connected to the conduit and the rubber pad. The fixed core protrudes from the casing and is connected to the rubber pad, and the fixed core is fixed to the casing remote from the one end of the movable core.

In the structure of the silent fuel gas solenoid valve described above, the outer peripheral portion of the seal portion is formed in a tapered shape.

In the structure of the silent fuel gas solenoid valve described above, the end of the fixed core is formed in a tapered shape, the movable core has a tapered groove that matches the shape of the end of the fixed core, and the tapered shape and the tapered groove, an air gap is formed with a predetermined distance therebetween.

In the structure of the silent fuel gas solenoid valve described above, the movable iron core is positioned between the rubber pad and the casing, and a restoring member is further interposed.

In the structure of the silent fuel gas solenoid valve described above, a seal ring is provided between one end of the casing facing the rubber pad and the conduit.

In the structure of the above silent fuel gas solenoid valve, the casing is provided with a boss portion, the seal ring is located in the boss portion, and the boss portion is a cylindrical boss portion or a tapered boss portion.

In the structure of the silent fuel gas solenoid valve described above, an auxiliary plate is fitted onto a portion of the conduit located within the casing, a bobbin is fitted onto the outside of the auxiliary plate, and a coil is wound on the outside of the bobbin. A protective material is provided on the outside of the coil.

The structure of the silent fuel gas solenoid valve provided by the present invention comprises a variant ring between the fixed core and the conduit. The deformed ring includes a movable core portion and a seal portion. The movable iron core has a high height and can provide good damping, and the seal part is in contact with the conduit to achieve sealing with the conduit and sealing against the fuel gas.
The structure of the silent fuel gas solenoid valve provided by the present invention has a small change in the height of the movable iron core, so the voltage in the valve is relatively stable when the valve is closed, and the operation of the entire solenoid valve is smooth and accurate. become.

1 is a schematic diagram showing the structure of a silent fuel gas solenoid valve provided in the first embodiment of the present invention; FIG. Fig. 4 is a schematic diagram showing a second structure of the silent fuel gas solenoid valve provided in the first embodiment of the present invention; Fig. 3 is a perspective view showing the structure of the variant ring provided in the present invention; FIG. 4 is a schematic diagram showing the structure of the silent fuel gas solenoid valve provided in the second embodiment of the present invention; Fig. 3 is a schematic diagram showing the structure of a silent fuel gas solenoid valve provided in the third embodiment of the present invention; 1 is a schematic diagram showing the structure of a fuel gas solenoid valve provided in the present invention; FIG.

To make the objectives, technical solutions and advantages of the present invention clearer, the following further describes the present invention through embodiments and with reference to the accompanying drawings. It should be noted that the specific embodiments described herein are used only to illustrate the invention and are not used to limit the invention.

The terms "first", "second", etc. are used herein to distinguish between the objects depicted and do not have an order or technical meaning. Also, "connections" and "couplings" referred to in this application mean direct and indirect connections (couplings) unless otherwise specified.

In describing the present invention, the terms "top", "bottom", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", Orientations or relationships indicated by "outer", "clockwise", "counterclockwise", etc. are based on the orientations or relationships shown in the drawings.

The above terms are only intended to facilitate and simplify the description of the invention and imply that a device or component must have a particular orientation and a particular structure or operation. is not. Accordingly, the above terminology should not be construed as limiting the invention.

In the present invention, unless expressly specified and limited to the contrary, the phrase "a first feature is 'above' or 'below' a second feature" means that "the first and second features are in direct contact." or the first and second features may be in indirect contact through an intermediate medium." Also, the expression "the first feature is 'above', 'above', or 'above' the second feature" means "the first feature is directly above or diagonally above the second feature." or "the horizontal height of the first feature is higher than the second feature".

The phrase "a first feature is 'below', 'beneath', or 'below' a second feature" means "the first feature is directly below or diagonally below the second feature, or The horizontal height of the first feature is lower than the second feature'.

Next, description will be made with reference to FIGS. 1 to 3. FIG. FIG. 1 is a first structural diagram of a silent fuel gas solenoid valve provided by the first embodiment of the present invention, and FIG. 2 is a second structural diagram of the silent fuel gas solenoid valve provided by the first embodiment. It is a structural diagram. FIG. 3 is a schematic diagram showing the structure of the variant ring provided by the present invention. The first embodiment of the present invention shows the structure of a silent fuel gas solenoid valve, which structure includes a casing 1, a rubber pad 2, a movable core 3, a fixed core 4 and a conduit 5.

The casing 1 has a housing structure and has an accommodation chamber 11 with one end closed by a fixing plate 15 , and a through hole 12 communicating with the accommodation chamber 11 at the other end of the accommodation chamber 11 . The through hole 12 is provided coaxially with the storage chamber 11 and positioned on the side of the storage chamber 11 facing the rubber pad 2 .

A conduit 5 is installed inside the casing 1 , and a movable iron core 3 is movably installed inside the conduit 5 , one end of which protrudes from the conduit 5 and the casing 1 and is connected to the rubber pad 2 .
Specifically, the conduit 5 is positioned within the storage chamber 11 and provided coaxially with the through hole 12 .

Further, an auxiliary plate 91 is fitted onto the portion of the conduit 5 located inside the casing 1 , and a bobbin 92 is fitted onto the outside of the auxiliary plate 91 . A coil 93 is wound around the outer circumference of the bobbin 92 , and a cylindrical protective member 94 is fitted around the outer circumference of the coil 93 .

Specifically, in this embodiment, the bobbin 92 includes a first plate 922 and a second plate 923 with the axis of the tubular portion 921 aligned with the axis of the conduit 5 . The first plate 922 is provided at one end of the tubular portion 921 near the rubber pad 2 and positioned in the radial direction of the conduit 5 . The second plate 923 is provided at one end of the tubular portion 921 near the fixed core 4 and positioned in the radial direction of the conduit 5 .

The auxiliary plate 91 consists of a radial plate 911 and a sleeve 912. One radial plate 911 of the auxiliary plate 91 is interposed between the casing 1 and the first plate 922, and the sleeve 912 connects the tubular portion 921 and the conduit. 5 and the other radial plate 911 of the auxiliary plate 91 is interposed between the casing 1 and the second plate 923 . A sleeve 912 is interposed between the tubular portion 921 and the conduit 5 with a predetermined distance between the two sleeves 912 .

The coil 93 is connected to an external circuit and generates an electromagnetic force when energized, which attracts the movable iron core 3 to the fixed iron core 4 .
Specifically, the movable iron core 3 is in the shape of a stepped shaft, one end is housed in the conduit 5, the other end extends from the conduit 5, and is connected to the rubber pad 2 via the through hole 12 of the casing 1. .

More specifically, the movable core 3 has a shoulder portion 31 at one end away from the casing 1 , and the rubber pad 2 has a stepped hole 21 matching the shape of the shoulder portion 31 . The diameter of the portion of the stepped hole 21 facing the casing 1 is smaller than the diameter of the portion far from the casing 1 . The shoulder portion 31 is housed in the stepped hole 21 and fixed to the rubber pad 2 and cannot be removed from the rubber pad 2.例文帳に追加Thereby, the movable iron core 3 and the rubber pad 2 are fixed and connected to each other.

Further, the movable iron core 3 is positioned between the rubber pad 2 and the casing 1 and has a restoring member 8 as well. This restoring member 8 is used for restoration when the rubber pad 2 and the movable iron core 3 are not subjected to electromagnetic force. Preferably, the restoring member 8 is a restoring spring.
A seal ring 7 is also provided between the end of the casing 1 facing the rubber pad 2 and the conduit 5 .

Preferably, in this embodiment the casing 1 comprises a boss portion 13 and the sealing ring 7 is arranged in the boss portion 13 . Here, the boss portion 13 is a tapered portion. Specifically, the end portion of the boss portion 13 facing the rubber pad 2 is formed as a planar structure portion 131, and the through hole 12 extends through the planar structure portion 131. The planar structure 131 and the first end face 14 of the casing 1 are connected to each other by a tapered structure 132 .

The ends of the fixed core 4 are aligned with the movable core 3, leaving a space therebetween. Specifically, one end of the fixed core 4 is fixed to the end of the casing 1 opposite the rubber pad 2 , and the other end is located in the conduit 5 and partially extends into the movable core 3 . The fixed core 4 is fixed to the fixed plate 15 here. Specifically, the end portion of the fixed core 4 is formed as a tapered structural portion 41 , and the movable core 3 is formed with a tapered groove portion 32 matching the shape of the end portion of the fixed core 4 . There is a preset distance between the tapered structure 41 and the tapered groove 32 to form an air gap 34 . Fuel gas is supplied to the air gap 34, and the movable core 3 moves toward the fixed core 4 by the action of electromagnetic force.

A variant ring 6 is provided between the fixed core 4 and the conduit 5 . Specifically, the variant ring 6 includes a movable core portion 61 and a seal portion 62 . The movable core portion 61 moves toward and contacts the movable core 3 .

The outer peripheral portion of the seal portion 62 is in contact with the conduit 5 to achieve sealing with the conduit 5 . The seal portion 62 is used to seal the fuel gas within the air gap 34 and prevent the fuel gas from flowing out of the air gap 34 . Preferably, the inclination angle of the tapered groove portion 32 and the tapered structure portion 41 is 5° so that the height of the movable iron core portion 61 of the deformed ring 6 does not excessively affect the voltage when the solenoid valve is closed. It is set at ~18°. Specifically, the angle between the tapered surface portion of the tapered groove portion 32 and the tapered surface portion of the tapered structure portion 41 is preferably 5° to 18°.

Preferably, the height of the variant ring 6 is set to 2 to 10 mm. A vent groove 611 is provided in the end surface of the deformed ring 6 facing the movable core 3 . More preferably, the ventilation groove 611 penetrates from the inner peripheral portion to the outer peripheral portion of the variant ring 6 . Here, the ventilation groove 611 is used to prevent the deformed ring 6 from attracting the movable iron core 3 and not opening.

The structure of the silent fuel gas solenoid valve provided in this embodiment comprises a variant ring 6 between the fixed core 4 and the conduit 5 . The variant ring 6 includes a movable core portion 61 and a seal portion 62 . The armature portion 61 has a high height and can provide good damping, and the seal portion 62 is in contact with the conduit 5 to achieve sealing and seal against fuel gas.

When the conduit 5 is installed, the radial pressure from the conduit 5 against the seal portion 62 increases the change in height of the movable core portion 61 . To avoid this large change, the outer periphery of the seal portion 62 is formed as a tapered structure. When the height change of the movable iron core portion 61 is small, the voltage in the solenoid valve is relatively stable when the valve is closed, and the entire solenoid valve operates smoothly and accurately.

The inner peripheral portion of the seal portion 62 is engaged with the fixed core 4 .
Specifically, in order to prevent deviation of the variant ring 6, the stationary core 4 is formed with a locking groove 42 for locking the variant ring 6, and the inner peripheral portion of the variant ring 6 is engaged. It is locked in the stop groove 42 .

Furthermore, the inner peripheral portion of the seal portion 62 is in contact with a portion of the groove wall of the locking groove 42 leaving a gap between it and the remaining portion of the groove wall of the locking groove 42 . For example, in this embodiment, the cross section of the locking groove 42 along the axis of the conduit 5 has a polygonal structure, and the inner peripheral portion of the seal portion 62 has an arcuate structure. As a result, a gap is left between the inner peripheral portion of the seal portion 62 and a portion of the groove wall of the locking groove 42 . Thus, the inner peripheral portion of the seal portion 62 is in contact with a portion of the groove wall of the locking groove 42, leaving a gap between the remaining portion of the groove wall of the locking groove 42. Therefore, an effect similar to a tapered structure can be obtained.

Next, description will be made with reference to FIG. FIG. 4 is a schematic diagram showing the structure of the silent fuel gas solenoid valve provided in the second embodiment of the present invention. The structure of the silent fuel gas solenoid valve in this embodiment is basically the same as the structure of the silent fuel gas solenoid valve in the first embodiment. is. The sealing reliability of the cylindrical boss portion is higher than that of the tapered boss portion of the first embodiment.

Next, description will be made with reference to FIG. FIG. 5 is a schematic diagram showing the structure of a silent fuel gas solenoid valve provided in the third embodiment of the present invention. The structure of the silent fuel gas solenoid valve in this embodiment is basically the same as the structure of the silent fuel gas solenoid valve in the first embodiment, but the difference is that the rubber pad 2 of this embodiment has an elastic protective layer 22 are provided. One end of the elastic protective layer 22 is integrally connected with the rubber pad 2 , and the other end is fitted over the movable core 3 and attached to the first end face 14 of the casing 1 .

Preferably, the elastic protective layer 22 comprises a threaded portion 221 and a sealing portion 222 . The threaded portion 221 is fitted onto the movable core 3 , and the seal portion 222 is provided in close contact with the first end face 14 of the casing 1 . As a result, it is possible to prevent external air from flowing into the internal space of the silent fuel gas solenoid valve and eroding the internal elements. Moreover, such a configuration eliminates the need to provide the seal ring 7 in the previous embodiment.

Next, description will be made with reference to FIG. FIG. 6 is a schematic diagram showing the structure of the fuel gas solenoid valve provided in the present invention. This fuel gas solenoid valve includes a valve body 10 and the structure of the silent fuel gas solenoid valve in the previous embodiment. A stepped chamber 16 having a first gas chamber 161 and a second gas chamber 162 is provided in the valve body 10 , and the diameter of the first gas chamber 161 is smaller than that of the second gas chamber 162 . The end of the valve body 10 provided with the second gas chamber 162 is hermetically joined to the corresponding end of the casing 1 . Rubber pad 2 and movable iron core 3 are partially arranged in second gas chamber 162 . The movable iron core 3 can drive the rubber pad 2 to separate it from the stepped surface of the stepped chamber 16 by the action of the electromagnetic force, thereby allowing the first gas chamber 161 and the second gas chamber to communicate with each other. At this time, the fuel gas in the second gas chamber 162 can enter the first gas chamber 161 to achieve open circulation of the fuel gas.

Preferably, the rubber pad 2 and the movable iron core 3 can be restored by the restoring member 8, and after restoration, the rubber pad 2 contacts the stepped surface of the stepped chamber 16 to form the first gas chamber 161 and the second gas chamber 162. blockage. At this time, the gas in the second gas chamber 162 does not enter the first gas chamber 161, thereby cutting off the fuel gas.

Specifically, in this embodiment, a projection 17 is provided on the stepped surface between the rubber pad 2 and the stepped chamber 16 in order to achieve better sealing performance. The projection 17 is located in the second gas chamber 162 and abuts or separates from the end surface of the rubber pad 2 , indirectly realizing the abutment or separation between the rubber pad 2 and the stepped surface of the stepped chamber 16 .

In the fuel gas solenoid valve of this embodiment, the variant ring 6 is provided between the fixed core 4 and the conduit 5 , and the variant ring 6 has a movable core portion 61 and a seal portion 62 . Here, the armature portion 61 has the required height to provide good damping. The seal portion 62 is in contact with the conduit 5 to achieve sealing with the conduit. As a result, sealing against fuel gas is realized, and when the conduit 5 is attached, it is possible to prevent the height of the movable core portion 61 from being greatly changed due to the pressure of the conduit 5 against the seal portion 62 . In this embodiment, the above-mentioned problem can be avoided by providing the tapered structure. The whole driving becomes smooth and precise. The inner peripheral portion of the seal portion 62 is partially in contact with the groove wall of the locking groove 42, leaving a gap between the groove wall of the remaining portion of the locking groove 42. there is Such a structure makes it possible to obtain the effect of a tapered structure.

Arbitrary combinations are possible for each technical feature of embodiment mentioned above. In order to simplify the description of the present invention, not all possible combinations of technical features in the above embodiments are described. As long as there is no contradiction in the combination of these technical features, it should be regarded as the range described in this specification.

Although the above embodiments show several embodiments of the present invention, and the descriptions thereof are relatively specific and detailed, they should not be construed as limiting the patent scope of the present invention. . It should be understood by those skilled in the art that several variations and modifications can be made without departing from the concept of the invention and are within the scope of the invention. Accordingly, the scope of rights of the present invention shall be subject to the scope of the appended claims.

1: casing, 11: housing chamber, 12: through hole, 13: boss portion, 131: flat portion, 132: tapered surface, 14: first end surface, 15: fixed plate, 2: rubber pad, 21: stepped hole, 22: elastic protective layer, 221: threaded portion, 22: seal portion, 3: movable core, 31: protrusion, 32: tapered groove, 34: air gap interval, 4: fixed core, 41: tapered structure Part 42: Locking groove part 5: Conduit 6: Variant ring 61: Movable iron core part 611: Ventilation groove 62: Seal part 7: Seal ring 8: Restoration member 91: Auxiliary plate 911 : radial plate, 912: sleeve, 92: bobbin, 921: tubular portion, 922: first plate, 923: second plate, 93: coil, 94: protective material, 10: valve body, 16: stepped chamber, 161: first fuel gas chamber, 162: second fuel gas chamber, 17: projection

Claims (10)

a movable iron core;
a fixed core;
a conduit;
with
The movable core is movably provided within the conduit,
The fixed core is installed in the conduit and partly extends to the movable core, and the ends of the fixed core are aligned with the movable core and are between the two. are spaced by
A deformed ring is provided between the fixed core and the conduit, the deformed ring includes a movable core portion and a seal portion, the movable core portion faces the movable core and faces the movable core. The inner peripheral portion of the seal portion is engaged with the fixed iron core, and the outer peripheral portion of the seal portion is in contact with the conduit to achieve sealing performance with the conduit. Structure of silent fuel gas solenoid valve. The stationary core is provided with a locking groove for locking the deformed ring, and the inner peripheral portion of the seal portion is in contact with a part of the groove wall of the locking groove, thereby 2. The structure of a silent fuel gas solenoid valve according to claim 1, wherein a gap is provided between the rest of the retaining groove and the groove wall. 3. The structure of a silent fuel gas solenoid valve according to claim 2, wherein said deformed ring is provided with a ventilation groove in an end face facing said movable iron core. Further, it has a casing and a rubber pad, the conduit is installed in the casing, and one end of the movable core remote from the fixed core protrudes from the conduit and the casing and is connected to the rubber pad. 4. The structure of the silent fuel gas solenoid valve according to any one of claims 1 to 3, wherein the fixed iron core is fixed to the casing far away from the one end of the movable iron core. 5. The structure of a silent fuel gas solenoid valve according to claim 4, wherein an outer peripheral portion of said seal portion is tapered. The end of the fixed core is tapered, the movable core has a tapered groove matching the shape of the end of the fixed core, and a predetermined distance is provided between the tapered shape and the tapered groove. 5. The structure of a silent fuel gas solenoid valve according to claim 4, wherein an air gap is formed with a gap between the two. 5. The structure of the silent fuel gas solenoid valve according to claim 4, wherein the movable iron core is positioned between the rubber pad and the casing, and a restoring member is further interposed. 5. The structure of a silent fuel gas solenoid valve according to claim 4, wherein a seal ring is provided between one end of said casing facing said rubber pad and said conduit. 9. The silent fuel gas of claim 8, wherein the casing is provided with a boss portion, the seal ring is located within the boss portion, and the boss portion is a cylindrical boss portion or a tapered boss portion. Solenoid valve structure. An auxiliary plate is fitted onto a portion of the conduit located within the casing, a bobbin is fitted onto the outside of the auxiliary plate, a coil is wound around the bobbin, and a protective material is provided outside the coil. The structure of a silent fuel gas solenoid valve according to claim 4, characterized in that

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