KR20220098534A - Solenoid Valve - Google Patents

Abstract

The present invention relates to a solenoid valve. More particularly, the present invention relates to a solenoid valve having a core magnetized by a magnetic field and having a plunger movably installed inside the core to open and close a flow path of a valve body or to adjust the degree of opening. According to the present invention, the solenoid valve comprises: a bobbin in which the core is coupled to the inside and a coil for generating a magnetic field when power is applied is wound; a case which is formed in the shape of an enclosure open to one side and surrounds the bobbin and the coil; a pole piece into which the core is inserted and which is installed to cover an opening in the case to support the bobbin and to be mounted on the valve body; and a molding housing formed by molding to cover the case and the pole piece while filling a gap between the case and the bobbin. Accordingly, the solenoid valve is mounted on the valve body through the pole piece, and parts replacement and assembly are easy.

Description

Solenoid Valve {Solenoid Valve}

The present invention relates to a solenoid valve, which is mounted on a valve body through a pole piece, and to a solenoid valve that is easy to replace and assemble parts.

In general, a solenoid valve is installed in a power train including an engine of a vehicle to regulate the flow of fluids, such as fuel and oil, or to control pressure. For example, the fuel system controls the supply and injection of fuel, the cooling system controls the circulation of fluids for lubrication and cooling, and the power transmission system controls pressure.

A conventional proportional control solenoid valve for controlling a high-pressure fluid such as hydrogen changes the nozzle inlet pressure of the jet pump on a flow path connecting a jet pump of a fuel cell system and a hydrogen tank and at the same time adjusts the hydrogen supply flow rate of the jet pump. A valve body mounted on the inlet side and having a flow path for transferring the fluid supplied from the outside, a plunger rising or falling by a solenoid, a valve body provided at the lower end of the plunger to open or close the flow path, and a flow path It is configured to include a spring for pressing the plunger in the direction of closing the.

One example of such a conventional proportional control solenoid valve installed on a fluid supply passage such as hydrogen is disclosed in detail in Korean Patent Registration No. 1930466 (hereinafter referred to as 'prior literature').

1 and 2, the conventional proportional control solenoid valve 1 disclosed in the prior literature includes a bobbin 12 wound with a coil 11 that generates a magnetic field when power is applied, and one end of the bobbin 12. The yoke 13, which is a fixed iron core, is coupled to the yoke 13 to induce a magnetic field, and is coupled to the other end of the bobbin 12, passes through the frame cover 20 and protrudes to the outside of the housing 30, and then passes through the C ring 40 The core 14 is a fixed iron core coupled with a magnetic field and is magnetized by a magnetic field, and the plunger 15 is a movable iron core that is movably installed inside the yoke 13 and moves toward the core 14 magnetized when power is applied. , a spring 16 for elastically supporting the plunger 15 in the direction of closing the flow path 50, valve bodies 17 and 18 installed at one end of the plunger 15 to seal the flow path 50, A guide 60 fixed between the bobbin 12 and the core 14 and extending outwardly through the yoke 13 , and one end of the guide 60 coupled to the valve body 17 , 18 . and a guide cover 70 that wraps around the periphery and one end is refracted inward to prevent separation of the plunger 15, and these parts are disposed inside the housing 30 and penetrate the housing 30 to pass through the valve It is characterized in that it is fixed with a screw 80 fastened to the body.

However, the conventional proportional control solenoid valve of this configuration requires a core, a yoke, a guide, a guide cover, etc. as parts constituting a fixed iron core, and as a guide cover is provided between the yoke and the valve body, the assembly tolerance of each part or There was a problem in that it could not be assembled with the set stroke due to a manufacturing error.

In addition, as the upper end of the core is fixed to the frame cover through the C-ring, an air gap occurs between the upper end of the core and the frame cover due to the C-ring, the groove into which the C-ring of the core is inserted, and the manufacturing error and assembly tolerance of the frame cover. , there was a problem in that magnetic force loss was increased due to the air gap.

In particular, the assembly is complicated as several parts are arranged inside the housing and fastened to the valve body via a screw. There was a problem in that the overall volume of the solenoid valve increases as it is provided in the shape of the housing.

0001) Republic of Korea Patent Publication No. 10-1930466

The present invention has been devised in the above background, having a cylindrical case and a solenoid valve having a cylindrical case and a part fastened to the valve body located on the lower side, but located on the outside of the molding housing to reduce the overall volume and facilitate assembly with the valve body Its purpose is to provide

In addition, an object of the present invention is to provide a solenoid valve having a molding housing to secure a core assembly space in which a core is assembled while fixing a case and parts installed inside the case to facilitate assembly and replacement of the core.

In addition, by reducing the number of parts, each part can be assembled to have a set operating stroke to reduce the assembly tolerance generated while assembling, thereby preventing fluctuations in the control section, simplifying the assembly process, and providing a solenoid valve that is easy to assemble. it has its purpose

The object of the present invention is not limited thereto, and other objects not mentioned will be clearly understood by those skilled in the art from the following description.

According to the present invention, in the solenoid valve having a core magnetized by a magnetic field and having a plunger movably installed inside the core to open and close the flow path of the valve body or to adjust the degree of opening, the core is coupled to the inside and when power is applied A bobbin in which a coil generating a magnetic field is wound, a case that is formed in the shape of a housing with an opening on one side and surrounds the bobbin and the coil, a core is inserted inside, and is installed to cover the open part of the case and supports the bobbin and is mounted on the valve body There may be provided a solenoid valve including a pole piece, a molding housing that is molded to fill between the case and the bobbin, and is molded to surround the case and the pole piece.

Here, the pole piece is formed to protrude from the outer circumferential surface may have a protrusion formed to protrude through the case to the outside of the molding housing.

A plurality of these protrusions are provided on the pole piece and may be mounted to the valve body at a predetermined interval through a plurality of fastening members.

In addition, the valve body may include a mounting portion formed to protrude toward the protrusion with a step in a portion facing the protrusion so as to be spaced apart from the molding housing.

In addition, the core is inserted into the chamber formed in the valve body, and the end may be in surface contact with the bottom surface of the chamber by the fastening force of the fastening member for fastening the pole piece toward the valve body.

The molding housing is a solenoid valve, characterized in that it has a connector portion formed to surround the power supply terminal connected to the coil for supplying power.

In addition, the bobbin has a position guide portion formed by protruding a portion through which the power supply terminal passes to be exposed to the outside of the case, and the position guide portion may be inserted into the position guide hole formed in the case.

The bobbin may have a blocking wall formed to protrude from a surface in contact with the bottom surface of the case and to protrude along the periphery of an inner circumferential surface into which the core is inserted.

The case may have a plurality of through holes in the outer peripheral wall surrounding the bobbin so that the molding housing is molded between the case and the bobbin.

According to the present invention as described above, the case is provided in a cylindrical shape and the part fastened with the valve body is located on the lower side, but is located outside the molding housing, so that the overall volume is reduced, so that the solenoid valve can be miniaturized, and the assembly with the valve body is easy. It has an easy effect.

In addition, the molding housing is provided so that the case and parts installed inside the case are fixed, and the core assembly space in which the core is assembled is secured, thereby facilitating the assembly and replacement of the core.

In addition, by reducing the number of parts, the assembly can be assembled to have a set operating stroke while reducing the assembly tolerance generated while each part is assembled, thereby preventing variations in the control section, simplifying the assembly process, and easy assembly.

In addition, there is an effect of minimizing the magnetic force loss by minimizing the air gap generated between the components that transmit the magnetic force.

1 is a perspective view of a solenoid valve installed in a conventional valve body.
2 is a cross-sectional view of a conventional solenoid valve.
3 is a view showing a state in which a solenoid valve is installed in a valve body according to an embodiment of the present invention.
FIG. 4 is an enlarged view of part A of FIG. 3 .
5 is a bottom view showing the assembled state of the case and the pole piece of the solenoid valve according to the embodiment of the present invention.
6 is a perspective view showing an assembly state of the case and the pole piece of the solenoid valve for blocking hydrogen according to an embodiment of the present invention.
7 is a perspective view showing before and after the molding housing of the solenoid valve for blocking hydrogen according to an embodiment of the present invention is molded.
8 is a perspective view illustrating an assembly state of a case and a pole piece of a solenoid valve for supplying hydrogen according to an embodiment of the present invention.
9 is a perspective view showing before and after the molding housing of the solenoid valve for supplying hydrogen according to an embodiment of the present invention is molded.
10 is a view showing a process of assembling the core of the solenoid valve according to an embodiment of the present invention.
11 is a cross-sectional view for showing the deformation of the case according to the support bolt of the solenoid valve according to the embodiment of the present invention.
12 is a view showing a process of assembling a solenoid valve to a valve body according to an embodiment of the present invention.
13 is an enlarged view of part B of FIG. 3 .
14 is a cross-sectional view showing an operating structure of a solenoid valve according to an embodiment of the present invention.

Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. In adding reference numerals to the components of each drawing, it should be noted that the same components are given the same reference numerals as much as possible even though they are indicated in different drawings. In addition, in describing the present invention, when it is determined that a detailed description of a related known configuration or function may obscure the gist of the present invention, the detailed description thereof will be omitted.

3 is a view showing a state in which a solenoid valve is installed in a valve body according to an embodiment of the present invention, FIG. 4 is an enlarged view of part A of FIG. 3, and FIG. 5 is a solenoid valve according to an embodiment of the present invention It is a bottom view showing the assembly state of the case and the pole piece, Figure 6 is a perspective view showing the assembly state of the case and the pole piece of the solenoid valve for blocking hydrogen according to an embodiment of the present invention, Figure 7 is an embodiment of the present invention It is a perspective view showing before and after the molding housing of the solenoid valve for blocking hydrogen is molded by the It is a perspective view showing before and after the molding housing of the solenoid valve for hydrogen supply according to the embodiment of the present invention is molded, and FIG. 10 is a view showing the process of assembling the core of the solenoid valve according to the embodiment of the present invention, FIG. is a cross-sectional view for showing the deformation of the case according to the support bolt of the solenoid valve according to the embodiment of the present invention, Figure 12 is a view showing the process of assembling the solenoid valve according to the embodiment of the present invention to the valve body, Figure 13 is an enlarged view of part B of FIG. 3 , and FIG. 14 is a cross-sectional view showing an operating structure of a solenoid valve according to an embodiment of the present invention.

As shown in these figures, the solenoid valve 10 according to an embodiment of the present invention has a core 500 magnetized by a magnetic field, and a plunger 600 is movably installed inside the core 500 to move the valve. In the solenoid valve 10 for opening and closing the flow path 130 of the body 100 or adjusting the degree of opening, the core 500 is coupled to the inside and a coil 401 generating a magnetic field when power is applied is wound on the bobbin 400 ), the case 200 is formed in a housing shape opened to one side and surrounds the bobbin 400 and the coil 401, the core 500 is inserted inside, and it is installed to cover the part opened in the case 200 The pole piece 300 that supports the bobbin 400 and is mounted on the valve body 100, fills between the case 200 and the bobbin 400, and is molded to surround the case 200 and the pole piece 300. It includes a molding housing (800).

In addition, in the detailed description of the present invention, for convenience of description, unless otherwise specified, the valve body 100 side of the solenoid valve 10 will be described as downward, and the opposite side will be described as upward.

The valve body 100 in which the solenoid valve 10 of the present invention is installed supplies or blocks hydrogen gas flowing into the fuel stack between the hydrogen tank and the fuel stack, and is provided to control the amount of hydrogen gas.

The valve body 100 is provided with a hydrogen blocking solenoid valve 10a on the side of the supply port 110 to which the hydrogen tank is connected to open and close one side of the supply flow path 131, and to open and close the other side of the supply flow path 131 A solenoid valve 10b for supplying hydrogen is installed to control the amount of hydrogen flowing through the discharge passage 132 .

The solenoid valve 10a for blocking hydrogen supplies or blocks the hydrogen gas flowing from the hydrogen tank to the fuel stack, and supplies the amount of hydrogen gas required by the fuel stack.

The solenoid valve 10b for supplying hydrogen is provided as a proportional control solenoid valve 10 to control the pressure and control the amount of hydrogen gas by controlling the opening amount.

The flow path 130 includes a supply flow path 131 extending from the supply port 110 to which the hydrogen tank is connected to the chamber 140 side of the solenoid valve 10a for hydrogen blocking, and a chamber ( 140) and a connection passage 133 extending toward the solenoid valve 10b for supplying hydrogen, and a discharge passage 132 extending from the solenoid valve 10b for hydrogen supply to the discharge port 120 to which the fuel stack is connected. can do.

And, the hydrogen supply solenoid valve (10a) will be described below, but the same can be applied to the hydrogen cutoff solenoid valve (10b), but is not limited thereto.

As such, the solenoid valve 10 is installed on one side of the valve body 100, and the bobbin 400 on which the coil 401 is wound, the core 500 magnetized by the coil 401, and the valve body 700 are installed. It is composed of a plunger 600 that opens and closes the flow path 130 formed in the valve body 100 or adjusts the degree of opening of the flow path 130 .

The valve body 100 is provided with a mounting surface 150 on which the solenoid valve 10 is mounted, and includes a chamber 140 formed by being depressed from the mounting surface 150 .

In the chamber 140 , the bottom surface 141 is connected to the flow path 130 , and is formed by being depressed in the mounting surface 150 , and is connected to the inlet portion of the flow path 130 at the center of the bottom surface 141 .

And the chamber 140 is formed to protrude from the bottom surface 141 is provided with a valve seat 142 formed to protrude along the periphery of the inlet of the flow path 130, and to the valve body 700 of the plunger 600. open or closed by As such, the valve seat 142 is formed to protrude from the bottom surface 141 of the chamber 140 to improve airtightness with the valve body 700 .

The bobbin 400 is provided in a spool shape in which flanges 410 are formed at both ends of a hollow cylindrical body, a coil 401 is wound around the outer circumferential surface to generate a magnetic field when power is applied, and a core having a fixed iron core inside ( 500) is inserted.

In addition, the flange 410 protruding from the upper end of the bobbin 400 faces the inner surface of the case 200 to be described later, and the flange 410 protruding from the lower end is the pole piece 300 to be described later. ) is closely related to

The coil 401 is connected to the power supply terminal 402 and power is applied. When power is applied, the coil 401 is a conducting wire that generates a magnetic field around the bobbin 400, and is tightly and uniformly wound around the outer circumferential surface of the bobbin 400. form a cylindrical shape.

The power supply terminal 402 is installed on the bobbin 400 , is connected to the coil 401 , receives power, and applies it to the coil 401 .

In addition, the magnetic field generated by the coil 401 when power is applied is induced by the core 500 to raise the plunger 600 . At this time, the strength of the magnetic field is proportional to the strength of the current flowing along the coil 401 and the number of coils 401 wound around the bobbin 400 , and applying a strong current to the coil 401 or winding the coil 401 a lot. A stronger magnetic field is generated, and the movement of the plunger 600 is reliably controlled.

The core 500 is a fixed iron core that induces a magnetic field generated by the coil 401, which is coupled to the inner circumferential surface of the bobbin 400, and a plunger 600 is inserted therein to form a sliding groove 511 that moves in the vertical direction, It is magnetized by the induction of a magnetic field and the induced magnetic field.

In addition, the core 500 is recessed at a position corresponding to the position of the bottom of the sliding groove 511 among the outer peripheral surface so that the induced magnetic field can be concentrated on the bottom side of the sliding groove 511, which is a specific position. Groove 560 is provided

The plunger 600 is provided in the shape of a hollow pipe and is movably installed inside the core 500 , and the valve body 700 sealing and closing the flow path 130 is coupled to an end thereof.

The plunger 600 is inserted into the sliding groove 511 of the core 500 and moves upward in the direction of opening the flow path 130 when power is applied, and when power is released, the flow path 130 by the spring 730. moves downward, which is the direction to close the

The valve body 700 is composed of an absorber 710 inserted or coupled to the lower end of the plunger 600 , and a plunger guide 720 for fixing the absorber 710 to the plunger 600 .

The absorber 710 is provided in the shape of a disk having a predetermined thickness, is seated at the lower end of the plunger 600, securely seals the flow path 130, and has a predetermined elasticity and rigidity so that problems such as peeling do not occur even when used for a long time. It may be made of a thermoplastic polyurethane material or a polyester-based elastomer material, but is not limited thereto.

In addition, the absorber 710 is in direct contact with the valve seat 142 to seal and close the flow path 130 , and protrudes from the bottom surface 141 of the chamber 140 by the elastic force of the spring 730 . It is pressed against the valve seat 142 and seals the flow path 130 while applying an elastic restoring force to the valve seat 142 .

The plunger guide 720 is fixed by screwing the inner peripheral surface of one side to the fastening end 610 protruding from the lower end of the plunger 600, and at the same time, the part protruding from the inner peripheral surface of the other side supports the absorber 710 to support the absorber ( 710 is fixed to the plunger 600 .

And the plunger guide 720 is supported by the other end of the spring 730 in a portion protruding from the outer circumferential surface of the other side.

One end of the spring 730 connects the sliding groove 511 and the receiving groove 521 of the core 500 and is supported on a stepped spring support surface 522 , and the other end is a plunger coupled to the plunger 600 . It is supported by the guide 720 to elastically support the plunger 600 in a direction to close the flow path 130 .

In addition, the solenoid valve 10 of the present invention surrounds the bobbin 400 and the coil 401, and in order to fix the core 500 to the valve body 100, the case 200, the pole piece 300, the molding housing ( 800) is provided.

The case 200 is formed in a cylindrical housing shape opened to one side, surrounds the bobbin 400 and the coil 401 , and is seated on the upper end of the core 500 to transmit magnetic force.

In particular, since the case 200 is provided in a cylindrical shape as the solenoid valve 10 is fastened with the valve body 100 through the pole piece 300, conventionally, it is square in order to be assembled to the valve body through a long screw. It is possible to reduce the overall volume of the solenoid valve 10 compared to that provided in the shape.

The case 200 has position guide holes 250a and 250b through which the power supply terminal 402 passes so that the power supply terminal 402 protrudes to the outside.

The position guide holes 250a and 250b are provided so that the bobbin 400 assembled inside the case 200 can be assembled at an accurate position, and the position guide parts 430a and 430b of the bobbin 400 are inserted.

The position guide portions 430a and 430b are formed so that a portion through which the power supply terminal 402 of the bobbin 400 passes is exposed to the outside of the case 200 and is inserted into the position guide holes 250a and 250b, It guides assembly with the case 200 .

The position guide portions 430a and 430b are formed on the upper flange 410 of the bobbin 400 or formed on the lower flange 410 of the bobbin 400 depending on the position of the power supply terminal 402 .

For example, in the case of the hydrogen cutoff solenoid valve 10a shown in FIGS. 6 and 7 (a), the position guide part 430a is partially protruded upward from the upper flange 410 of the bobbin 400. is formed, and the position guide hole 250a is formed so that the position guide part 430a is inserted in the upper side of the case 200 .

In addition, in the case of the hydrogen supply solenoid valve 10b shown in FIGS. 8 and 9 (a), the position guide part 430b is formed by protruding a part from the outer peripheral surface of the flange 410 on the lower side of the bobbin 400. and the position guide hole 250b is formed by being recessed in part so that the position guide part 430b is inserted at the open end of the case.

In addition, the case 200 is formed by molding a plurality of through holes 240 in the outer peripheral wall surrounding the bobbin 400 so that a molding housing 800 to be described later is also molded between the case 200 and the bobbin 400 .

The pole piece 300 is provided in the shape of a disk in which the through hole 310 into which the core 500 is inserted is formed in the center, and is installed to be inserted into the case 200 to cover the open portion of the case 200 , It is coupled to the case 200 and is in close contact with the flange 410 of the lower end of the bobbin 400 and supports the bobbin 400 .

The pole piece 300 has an upper side that supports the flange 410 of the lower end of the bobbin 400 and a lower side that supports the step surface 530 of the core 500 to be described later, and transmits a magnetic force. As described above, the case 200 and the pole piece 300 are in contact with the core 500 to provide a function of transferring a magnetic force to the core 500 .

The molding housing 800 is molded to surround the pole piece 300 and the case 200 to completely fix the pole piece 300 and the case 200, and when power is applied, the core 500 and the case 200. , so that the magnetic force transmitted to the pole piece 300 is not lost.

In addition, the molding housing 800 is molded to fill the space between the bobbin 400 and the case 200 by flowing into the inside of the case 200 through the through hole 240 formed in the case 200 during molding. .

However, in order to prevent the molding housing 800 from protruding to the inside of the bobbin 400, the bobbin 400 is formed to protrude from the surface in contact with the bottom surface of the case 200, and the inner circumferential surface into which the core 500 is inserted. and a blocking wall 420 formed to protrude along the circumference of the

The blocking wall 420 prevents the molding resin forming the molding housing 800 from flowing into the bobbin 400 when it is injected as it supports the bottom surface of the case 200 .

In particular, as the support bolt 501, which will be described later, is fastened to the core 500 and deforms the deformable portion 220 of the case 200, the blocking wall 420 is in close contact with the deformable portion 220 and the molding housing 800 ) is prevented from being molded to protrude into the inner side of the bobbin 400 .

As such, the molding housing 800 completely fixes the case 200 and the parts installed therein, and the molding housing 800 does not protrude to the inside of the bobbin 400, so the core 500 on the inside of the bobbin 400. It is possible to secure a space for assembling the core to be assembled.

Accordingly, when assembling the core 500 or replacing the core 500, only the core 500 can be assembled in the case 200 and the bobbin 400 fixed by the molding housing 800, or only the core 500 can be replaced. and easy to replace.

Here, the core 500 is inserted into the core assembly space, which is the inner circumferential surface of the bobbin 400 , and then the support bolt 501 is fastened to the upper end and fixed to the case 200 . That is, the support bolt 501 passes through the assembly hole 210 formed in the center of the upper side of the case 200 and is fastened to the screw groove 540 formed at the upper end of the core 500 to attach the core 500 to the case 200 . ) is fixed.

In addition, the molding housing 800 is provided with connector portions 810a and 810b that surround the position guide portions 430a and 430b and expose the ends of the power supply terminal 402 .

In the case of such a hydrogen-blocking solenoid valve 10a, the connector part 810a is formed to surround the position guide part 430a protruding upward of the case 200, as shown in FIG. 7(b).

In addition, in the case of the solenoid valve 10b for supplying hydrogen, the connector part 810b is formed to surround the position guide part 430b protruding outward in the radial direction of the case as shown in FIG. 9(b).

In addition, the solenoid valve 10 has a pole piece 300 provided on the lower side of the solenoid valve 10, and a protrusion 320 protruding to the outside of the molding housing 800 is connected to the valve body ( As it is mounted on 100), assembly is simplified and the solenoid valve 10 can be miniaturized.

That is, the configuration of assembling the solenoid valve 10 to the valve body 100 is located below the solenoid valve 10 and is located adjacent to the valve body 100, and the solenoid valve is mounted on the valve body as in the prior art. Since the fastening member does not have a structure that penetrates the molding housing or the case in the axial direction, the solenoid valve 10 is miniaturized.

And since the case 200, the pole piece 300, the coil 401, and the bobbin 400 are fixed to each other by the molding housing 800, only the pole piece 300 is connected to the valve body 100 by the fastening member 101. When fastened as a medium, the solenoid valve 10 is mounted.

The pole piece 300 is formed to protrude from the outer circumferential surface, and is provided with a protrusion 320 formed to protrude through the case 200 and protrude to the outside of the molding housing 800 to attach the fastening member 101 to the valve body 100 . installed as a medium.

The protrusions 320 are provided with a plurality of being spaced apart from each other at equal intervals in the radial direction, and are inserted into the insertion grooves 230 formed by being depressed in the longitudinal direction at positions corresponding to the protrusions 320 at the lower end of the case 200 .

As described above, the insertion groove 230 of the case 200 is opened downward, the protrusion 320 is inserted from the lower side, and the pole piece 300 is inserted from the lower side of the case 200 . And as the core 500 is fixed to the case 200 through a support bolt 501 to be described later, the pole piece 300 inserted into the case 200 is fixed.

And the pole piece 300 inserted into the case 200 by the molding housing 800 is completely fixed.

In particular, the protrusion 320 protrudes to the outside of the case 200 to face the mounting surface 150 of the valve body 100 and a through hole 330 through which the fastening member 101 passes is formed. Here, the fastening member 101 passes through the through hole 330 of the pole piece 300 and is fastened to the mounting groove 152 of the valve body 100 to install the pole piece 300 to the valve body 100 . .

In addition, the protrusion 320 is mounted on the valve body 100 and the mounting surface 150 and the spaced apart state by a predetermined distance.

In addition, the molding housing 800 is also mounted to be spaced apart from the valve body 100 so that the lower side facing the mounting surface 150 of the valve body 100 is spaced apart from the mounting surface 150 .

To this end, the valve body 100 is provided with a mounting portion 151 formed to protrude toward the protrusion 320 with a step in the portion facing the protrusion 320 of the pole piece 300 of the mounting surface 150 .

The protrusion height of the mounting portion 151 is equal to or higher than the thickness of the portion covering the lower surface of the pole piece 300 of the molding housing 800 to separate the molding housing 800 from the valve body 100. it is preferable

In addition, the mounting portion 151 is recessed from the protruding end surface, a screw thread is formed inside, and a mounting groove 152 to which the fastening member 101 is screwed is provided.

The fastening member 101 is screwed into the mounting groove 152 through the through hole 330 of the protrusion 320 , the body 503 is screwed into the mounting groove 152 , and the head 502 is The upper surface of the protrusion 320 is supported.

In addition, the lower end of the core 500 is inserted into the chamber 140 , the flat end surface of the lower end is in surface contact with the flat bottom surface 141 of the chamber 140 , and the position is aligned and stably assembled in the chamber 140 . do.

As such, there are no parts to be additionally assembled between the valve body 100 and the core 500, and the end surface of the lower end of the core 500 is in surface contact with the bottom surface 141 of the chamber 140 to provide a set stroke will do

One side of the core 500 is inserted into the chamber 140 of the valve body 100 and the other side is inserted into the inner peripheral surface of the bobbin 400 , and the core 500 has a small diameter part 510 and a large diameter part 520 . is composed

The small-diameter portion 510 is formed to extend in the longitudinal direction, is provided in a cylindrical shape, and is inserted into the inner circumferential surface of the bobbin 400 .

In the small diameter portion 510 , a sliding groove 511 having a circular cross section is formed to extend in the longitudinal direction, and the plunger 600 is inserted into the sliding groove 511 to be movable in the vertical direction.

The large-diameter portion 520 is stepped at the lower end of the small-diameter portion 510 and has an enlarged diameter and is inserted into the chamber 140 of the valve body 100, and the end surface of the lower end is the bottom surface 141 of the chamber 140. settled in and interviewed.

As such, after the large diameter part 520 is inserted into the chamber 140 and in surface contact with the bottom surface 141, a separate part is inserted so that the positions of the core and the yoke are not aligned and the stroke of the valve is fluctuated due to an assembly error. Compared to that, the position of the core 500 is aligned and can be accurately assembled.

In addition, the large-diameter portion 520 communicates with the sliding groove 511, and is extended in the sliding groove 511 to form a receiving groove 521 having a larger inner diameter.

The receiving groove 521 is opened downward to surround a portion of the plunger 600 and the valve body 700 , and provides a space for opening and closing the valve together with the bottom surface of the chamber 140 .

In addition, the core 500 is provided with a stepped surface 530 connecting between the small diameter portion 510 and the large diameter portion 520 , and a pole piece 300 to be described later is supported and supported in surface contact while being fixed to the case 200 . A support force to be fastened to the valve body 100 is provided.

In addition, a process of assembling the core 500 will be described with reference to FIGS. 10 to 11 .

First, the core 500 is inserted into the through hole 310 of the pole piece 300 , and after being inserted into the inner circumferential surface of the bobbin 400 , the upper surface is seated on the case 200 .

Then, the core 500 passes through the assembly hole 210 formed in the case 200 and is fixed to the case 200 through the support bolts 501 that are fastened to the screw grooves 540 formed at the upper end.

The support bolt 501 is fastened to a screw groove 540 in which a threaded body portion 503 is recessed in the center of the end surface of the upper end of the core 500, and is stepped in the body portion 503 and has a diameter The enlarged head 502 supports the upper surface of the case 200 .

Here, the support bolt 501 is formed to protrude outward in the radial direction from the lower end of the head portion 502 and further includes a support portion 504 for supporting the upper surface of the case 200 .

The assembly hole 210 is formed with a diameter larger than the diameter of the body 503 so as not to be screwed into the support bolt 501 , and the support bolt 501 passes through the case 200 and is fastened to the screw groove 540 . prepared to be

In addition, the core 500 is provided with a position fixing part 550 that is formed to protrude from the upper surface of the other end and is inserted into the assembly hole 210 to secure a contact area with the case 200 and position it with the case 200 . are sorted

However, the protruding height of the position fixing part 550 is formed lower than the thickness of the case 200 so that the support bolt 501 is fastened to the core 500 to provide a supporting force in the case 200 in a direction in close contact with the core 500 . to provide

If the protruding height of the position fixing unit 550 is higher than the thickness of the case 200 so that the position fixing unit 550 protrudes to the outside of the case 200 , the head 502 and the supporting unit 504 of the support bolt 501 are ) can not provide a supporting force to the case 200 , it is preferable that the protrusion height of the position fixing part 550 is formed lower than the thickness of the case 200 .

As described above, as the support bolt 501 passes through the case 200 and is fastened to the core 500 , the core 500 is fixed to the case 200 , and the pole piece supported on the stepped surface 530 of the core 500 . 300 is also fixed to the case 200 . Here, the pole piece 300 is supported by the insertion groove 230 of the case 200 while the upper side is supported by the flange 410 of the lower end of the bobbin 400 and the lower side is supported by the stepped surface 530 . It is fixed to the case 200 .

Accordingly, the case 200 , the core 500 , and the pole piece 300 can be assembled at once by providing the support bolt 501 , and the contact state between the stepped surface 530 of the core 500 and the pole piece 300 . , the contact state between the upper end of the core 500 and the case 200 is stably maintained.

In particular, since the C-ring, guide, and guide cover, which were required for assembling the core in the prior art, are unnecessary, the number of parts is reduced, and it is possible to prevent the occurrence of assembly tolerances that occur when assembling a plurality of parts.

In particular, in the case 200 , a portion in contact with one end of the core 500 of the case 200 is inclined upwardly or downwardly so that a gap does not occur between the case 200 and the core 500 .

As such, the deformable portion 220 formed to be inclined upward or downward of the case 200 is provided to be easily deformed when the support bolt 501 is fastened to the screw groove 540 and provides a supporting force to the case 200 .

11 (a) is a view showing a state before the supporting force of the support bolt 501 is applied to the case 200, and the case 200 is formed so that a portion in contact with one end of the core 500 is inclined upward. . However, the case 200 may be formed so that a portion in contact with one end of the core 500 is inclined downward.

And, in the diagram (b) of FIG. 11 , the support bolt 501 is fastened to the screw groove 540 and provides support to the case 200 so that the case 200 is in close contact with the upper end of the core 500 . As a diagram showing, as the support bolt 501 is fastened to the screw groove 540, a tightening force is applied, and the deformable part 220 of the case 200 is deformed so as to be in close contact with the upper end of the core 500, the deformable part 220 and a gap between the core 500 and the core 500 is prevented from occurring.

In particular, the deformable portion 220 is upwardly toward the center at a portion corresponding to the edge of the upper end of the core 500 of the case 200 so that the case 200 is easily deformed and is in close contact with the upper end of the core 500 . It is preferable to be formed to be inclined or inclined downward.

If the case 200 is not provided with the deformable part 220 , the length from the step surface 530 to the upper end of the core 500 is short, so that a gap is formed between the upper end of the core 500 and the case 200 . Even if it occurs, since the upper side of the case 200 is provided with a flat surface, the support force of the support bolt 501 cannot make a close contact between the upper end of the core 500 and the case 200, and even if the case 200 is deformed Since it is in line contact with the upper end of the core 500 , an air gap is generated between the upper end of the core 500 and the case 200 .

Accordingly, the deformable part 220 is provided in the case 200 , and the deformable part 220 is formed by the supporting force of the support bolt 501 while the core 500 is installed through the support bolt 501 in the case 200 . It is preferable to be in close contact with the upper end of the core 500 and to prevent an air gap from occurring.

And, even if an error occurs during the manufacture of each part, between the case 200 and the core 500 and between the step surface 530 and the pole piece 300 by tightening the support bolt 501 screwed to the screw groove 540 . It prevents the air gap from being formed by adhering the

At this time, the entire case 200 or the deformable portion 220 of the case 200 can be deformed toward the upper end of the core 500 by the supporting force of the support bolt 501 while transferring the magnetic force to the core 500 without loss. It is preferable to be provided with a material.

In addition, a process of fastening the solenoid valve 10 to the valve body 100 will be described with reference to FIGS. 12 and 13 .

First, the solenoid valve 10 inserts the bobbin 400 on which the coil 401 is wound into the case 200, and then covers the opened portion of the case 200 with the pole piece 300, and the core 500. After inserting the small diameter portion 510 of the bobbin 400 into the inner side of the through hole 310 of the pole piece 300 and the inner side of the bobbin 400, it is assembled by screwing the support bolt 501 to the core 500. After that, the molding housing 800 surrounds a portion of the outer side of the case 200 and the lower side of the pole piece 300 and fills the space between the case 200 and the bobbin 400 and between the case 200 and the coil 401 . Molding is formed to fix the bonding state of the parts.

The solenoid valve 10 is inserted such that the large-diameter portion 520 of the core 500 is inserted into the chamber 140 , and the lower end surface of the large-diameter portion 520 is in surface contact with the bottom surface 141 of the chamber 140 . and the protrusion 320 of the pole piece 300 is fixed to the valve body 100 through the fastening member 101 screwed to the valve body 100 .

At this time, the depth recessed from the mounting surface 150 of the chamber 140 is formed to be lower than the vertical length of the large-diameter portion 520 , and the step surface 530 after the large-diameter portion 520 is inserted into the chamber 140 . The protrusions 320 of the pole pieces 300 supported on the poles are installed to be spaced apart by a distance (a) set from the protruding end of the mounting part 151 .

That is, the pole piece 300 is installed to be spaced apart from the valve body 100 by a set separation distance (a), and the fastening member 101 is fastened to the mounting groove 152 to provide support to the pole piece 300. provided, and the large-diameter portion 520 of the core 500 is surface-contacted and fixed to the bottom surface 141 of the chamber 140 by this supporting force.

As such, as the pole piece 300 is spaced apart from the valve body 100 by a set separation distance (a), the magnetic force transmitted to the pole piece 300 is not transmitted to the valve body 100 side, thereby preventing magnetic force loss. , the solenoid valve 10 is stably installed in the valve body 100 .

In this case, the set separation distance (a) may be set in consideration of surrounding parts and magnetic force.

In addition, a sealing member insertion groove 524 into which the sealing member 505 is inserted may be formed on the outer circumferential surface of the large-diameter portion 520 , and the sealing member 505 resilients the chamber 140 and the large-diameter portion 520 , respectively. support

In addition, referring to FIG. 14 , the operating structure of the solenoid valve 10 is described. In FIG. 14 (a), power is not applied to the coil 401, so that the plunger 600 is a valve seat by a spring 730. (142) is a state moved to the side, the plunger guide 720 is spaced apart from the core (500).

The plunger 600 moves toward the valve seat 142 so that the absorber 710 of the valve body 700 is in close contact with the valve seat 142 and closes the flow path 130 .

And the distance (s) until the plunger guide 720 is in contact with the core 500 in a spaced apart state becomes the operating stroke distance, which is the distance the plunger 600 moves to open and close the valve during valve operation.

At this time, the spring support surface 522 of the core 500 is provided with a first stopper 523 which is formed to protrude toward the plunger guide 720 , and is formed to protrude outward from one end of the plunger guide 720 . A second stopper 721 facing the first stopper 523 is provided.

And the distance between the first stopper 523 and the second stopper 721 becomes the operating stroke distance of the valve.

Then, when power is applied to the coil 401 , a magnetic field is generated around the bobbin 400 and the coil 401 as shown in FIG. 14 ( b ), and the bobbin 400 , the case 200 ), magnetic force is transmitted through the pole piece 300 , and the plunger 600 compresses the spring 730 and moves upward to open the flow path 130 .

The valve body 700 of the plunger 600 is spaced apart from the valve seat 142 to open the flow path 130 , and supplies hydrogen gas through the flow path 130 .

According to the embodiments of the present invention having such a shape and structure, the case is provided in a cylindrical shape and the part fastened with the valve body is located on the lower side, but is located on the outside of the molding housing, so that the overall volume is reduced, so that the solenoid valve can be miniaturized and , it has the effect of easy assembly with the valve body.

In addition, the molding housing is provided so that the case and the parts installed inside the case are fixed, and the core assembly space in which the core is assembled is secured, thereby facilitating the assembly and replacement of the core.

In addition, by reducing the number of parts, the assembly can be assembled to have a set operating stroke while reducing the assembly tolerance generated while assembling each part, thereby preventing variations in the control section, simplifying the assembly process, and facilitating assembly.

In addition, there is an effect of minimizing the magnetic force loss by minimizing the air gap generated between the components that transmit the magnetic force.

In particular, as the case, core, and pole piece are assembled at once through the support bolt, assembly is easy and the number of parts for assembling is reduced, thereby minimizing assembly tolerance, and air gap due to the assembly tolerance between the conventional C-ring and the groove. It has the effect of preventing the occurrence.

In addition, as the support bolt is fastened to the screw groove, the case is brought into close contact with the core and the pole piece is pressed against the stepped surface to prevent an air gap, and as a deformable part is provided in the case, it is in surface contact with the core to generate an air gap. has the effect of preventing

And, after assembling the lower end of the core so as to make surface contact with the bottom surface of the chamber, the solenoid valve is installed on the valve body using a fastening member passing through the protrusion protruding to the outside of the case, so assembly is much easier and the position of the core It has the effect of easy sorting.

In addition, since the case is in surface contact with the upper end of the core, and the pole piece is in surface contact with the step surface, it is spaced apart from the valve body, thereby reducing loss when transmitting magnetic force.

In the above, even if all the components constituting the embodiment of the present invention are described as being combined or operating in combination, the present invention is not necessarily limited to this embodiment. That is, within the scope of the object of the present invention, all the components may operate by selectively combining one or more.

The above description is merely illustrative of the technical spirit of the present invention, and various modifications and variations will be possible without departing from the essential characteristics of the present invention by those skilled in the art to which the present invention pertains. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical spirit of the present invention, but to illustrate, and the scope of the technical spirit of the present invention is not limited by these embodiments. The protection scope of the present invention should be interpreted by the following claims, and all technical ideas within the scope equivalent thereto should be construed as being included in the scope of the present invention.

10: solenoid valve 100: valve body
140: chamber 141: bottom surface
142: valve seat 150: mounting surface
151: mounting unit 200: case
210: assembly hole 220: deformation part
300: pole piece 310: through hole
320: protrusion 330: through hole
400: bobbin 401: coil
420: barrier 500: core
501: support bolt 502: head
503: body 504: support
510: small diameter 511: sliding groove
520: Daegyeongbu 521: accommodation home
522: spring support surface 523: stopper
530: stepped surface 540: screw groove
550: position fixing unit 600: plunger
700: valve body 710: absorber
720: plunger guide 730: spring
800: molding housing

Claims (9)

In the solenoid valve having a core magnetized by a magnetic field, the plunger is movably installed inside the core to open and close the flow path of the valve body or to adjust the degree of opening,
a bobbin having the core coupled therein and having a coil wound therein for generating a magnetic field when power is applied;
a case formed in the shape of an enclosure opened to one side to surround the bobbin and the coil;
a pole piece having the core inserted therein, installed to cover the opening portion of the case, supporting the bobbin, and mounted on the valve body; and
a molding housing filled between the case and the bobbin and formed by molding to surround the case and the pole piece;
A solenoid valve comprising a.
The method of claim 1,
The pole piece faces the valve body and is formed to protrude from an outer circumferential surface, and has a protrusion formed to protrude through the case to the outside of the molding housing.
3. The method of claim 2,
A plurality of the protrusions are provided on the pole piece, and the solenoid valve, characterized in that it is mounted to the valve body at a predetermined interval through a plurality of fastening members.
4. The method of claim 3,
The valve body is spaced apart from the molding housing, the portion facing the protrusion is stepped and the solenoid valve is characterized in that it has a mounting portion formed to protrude toward the protrusion.
4. The method of claim 3,
The core is inserted into the chamber formed in the valve body, and the end of the solenoid valve is in surface contact with the bottom surface of the chamber by the fastening force of the fastening member for fastening the pole piece toward the valve body.
The method of claim 1,
The molding housing is a solenoid valve, characterized in that it has a connector formed to surround the power supply terminal connected to the coil for supplying power.
7. The method of claim 6,
The bobbin has a position guide portion formed so that a portion through which the power supply terminal passes is protruded to be exposed to the outside of the case, and the position guide portion is inserted into the position guide hole formed in the case.
The method of claim 1,
The bobbin is formed to protrude from the surface in contact with the bottom surface of the case, the solenoid valve characterized in that it has a blocking wall formed to protrude along the periphery of the inner peripheral surface into which the core is inserted.
The method of claim 1,
The case is a solenoid valve, characterized in that it has a plurality of through holes in the outer peripheral wall surrounding the bobbin so that the molding housing is molded between the case and the bobbin.

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