KR20220077552A - Solenoid Valve - Google Patents

Abstract

The present invention relates to a solenoid valve, in which a solenoid valve opens and closes a flow path or controls the degree of opening, in which a coil generating a magnetic field when power is applied is wound on a bobbin, a core coupled to the bobbin and magnetized by a magnetic field, and the inside of the core It is installed movably and moves in the direction of opening the flow path when power is applied, and includes a plunger coupled with a valve body that seals and closes the flow path at the end, and a spring that elastically supports the plunger in the direction of closing the flow path, the core having one side It is inserted into the chamber formed in the valve body and one end is in surface contact with the bottom surface of the chamber to reduce the loss of magnetic force and prevent fluctuations in the control section.

Description

Solenoid Valve {Solenoid Valve}

The present invention relates to a solenoid valve, and to a solenoid valve for reducing magnetic force loss and preventing fluctuations in a control section.

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 a fluid 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 the transfer of 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 path such as hydrogen is disclosed in detail in Korean Patent Registration No. 1930466 (hereinafter referred to as 'prior literature').

1, the conventional proportional control solenoid valve 1 disclosed in the prior literature is coupled to one end of the bobbin 12, the bobbin 12 around which the coil 11 that generates a magnetic field when power is applied, The yoke 13, which is a fixed iron core, inducing a magnetic field, 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 is coupled via the C-ring 40 , the core 14 as a fixed iron core magnetized by a magnetic field, a plunger 15 as a movable iron core that is movably installed inside the yoke 13 and moves toward the core 14 magnetized when power is applied, the flow path A spring 16 elastically supporting the plunger 15 in the direction of closing 50, valve bodies 17 and 18 installed at one end of the plunger 15 to seal the flow path, and the bobbin 12 and a guide 60 fixed between the core 14 and extending outwardly through the yoke 13 , and one end coupled to one end of the guide 60 and surrounding the periphery of the valve body 17 and 18 , and one end It is characterized in that it is configured to include a guide cover 70 that is bent inward to prevent separation of the plunger (15).

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 or There was a problem in that it could not be assembled with the set stroke due to a manufacturing error.

Here, the stroke is the distance that the plunger moves to open and close the valve when the valve is operated, and if the stroke is not assembled with the set stroke, the control section of the solenoid valve is changed, so there is a problem of quality problems.

In addition, the bobbin, core, yoke, frame cover, and housing must be assembled in close contact with each other to reduce losses when transmitting magnetic force between parts. There was a problem in that the assembly process was complicated and assembly tolerances were generated because of the large number of parts for fixing.

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.

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

The present invention has been devised in the background described above, by reducing the number of parts to reduce the assembling tolerance generated while each part is assembled, and to be assembled to have a set operating stroke, thereby preventing variations in the control section, simplifying the assembly process, An object of the present invention is to provide a solenoid valve that is easy to assemble.

Another object of the present invention is to provide a solenoid valve that minimizes magnetic force loss by minimizing an air gap generated between components that transmit magnetic force.

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 for opening and closing the flow path or adjusting the degree of opening, a coil generating a magnetic field when power is applied is wound on a bobbin, a core coupled to the bobbin and magnetized by the magnetic field, and movably installed inside the core, A plunger that moves in a direction to open a flow path when power is applied and has a valve body coupled to an end to seal and close the flow path, and a spring for elastically supporting the plunger in a direction to close the flow path. A solenoid valve that is inserted into and has one end in surface contact with the bottom surface of the chamber may be provided.

In addition, the solenoid valve is formed in a housing shape with an opening on one side, surrounds the bobbin and the coil, and is seated on the other end of the core. It may further include a pole piece to.

In addition, the core may include a small-diameter portion inserted into the bobbin, and a large-diameter portion that is stepped from the small-diameter portion and has an enlarged diameter to be inserted into the chamber of the valve body.

In addition, the pole piece may be supported on a stepped surface connecting the small-diameter portion and the large-diameter portion.

The pole piece is provided with a plurality of protrusions protruding from the outer circumferential surface to the outside of the case, and may be installed on the valve body via a plurality of fastening members.

At this time, the pole piece may be installed in a spaced apart state from the valve body.

In addition, the solenoid valve may further include a support bolt fastened to the core through an assembly hole formed in the case.

In addition, the core may include a position fixing portion formed to protrude from the other end so as to be inserted into the assembly hole.

In order for the support bolt to be fastened to the core to provide support in a direction in which the case is in close contact with the core, the protrusion height of the position fixing part may be formed to be lower than the thickness of the case.

Also, the case may be formed so that a portion in contact with one end of the core is inclined upward or downward.

In addition, according to the present invention, in the solenoid valve for opening and closing the flow path or adjusting the degree of opening, the case-shaped case opened to one side, the pole piece installed to cover the one side opened to the case, and the magnetic field when the power is applied A bobbin on which a coil is wound, a core coupled to the bobbin and magnetized by a magnetic field, a valve body that is movably installed inside the core and moves in the direction to open the flow path when power is applied, and seals the flow path at the end to close it. A solenoid valve including a plunger, a spring elastically supporting the plunger in a direction for closing the flow path, and a support bolt that passes through an assembly hole formed in the case and is fastened to the core may be provided.

According to the present invention as described above, the number of parts is reduced, the assembly tolerance generated while each part is assembled, and the assembly can be assembled to have a set operating stroke, thereby preventing variations in the control section, simplifying the assembly process, and easy assembly. It works.

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 cross-sectional view of a solenoid valve according to the prior art.
2 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. 3 is an enlarged view of part A of FIG. 2 .
4 is a perspective view illustrating an assembly state of a case and a pole piece of a solenoid valve according to an embodiment of the present invention.
FIG. 5 is an enlarged view of part B of FIG. 4 .
6 is a view showing a process of assembling the core of the solenoid valve according to an embodiment of the present invention.
7 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.
8 is a view showing a process of assembling the solenoid valve to the valve body according to the embodiment of the present invention.
9 is a cross-sectional view of a solenoid valve according to an embodiment of the present invention.
FIG. 10 is an enlarged view of part C of FIG. 9 .
11 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, if 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.

2 is a view showing a state in which a solenoid valve is installed on a valve body according to an embodiment of the present invention, FIG. 3 is an enlarged view of part A of FIG. 2, and FIG. 4 is a view showing a solenoid valve according to an embodiment of the present invention It is a perspective view showing the assembly state of the case and the pole piece, Figure 5 is an enlarged view of part B of Figure 4, Figure 6 is a view showing the process of assembling the core of the solenoid valve according to the embodiment of the present invention, Figure 7 is a cross-sectional view showing the deformation of the case according to the support bolt of the solenoid valve according to the embodiment of the present invention, and Figure 8 is a view showing the process of assembling the solenoid valve according to the embodiment of the present invention to the valve body, 9 is a cross-sectional view of a solenoid valve according to an embodiment of the present invention, FIG. 10 is an enlarged view of part C of FIG. 9, and FIG. 11 is a cross-sectional view showing the operating structure of the solenoid valve according to an embodiment of the present invention.

As shown in these drawings, the solenoid valve 10 according to the embodiment of the present invention is a coil 401 for generating a magnetic field when power is applied in the solenoid valve 10 for controlling the degree of opening and closing or opening of the flow path 130 . ) wound bobbin 400, the core 500 coupled to the bobbin 400 and magnetized by a magnetic field, is movably installed inside the core 500 and moves in the direction of opening the flow path 130 when power is applied and a plunger 600 to which a valve body 700 for sealing and closing the flow path 130 is coupled to an end thereof, and a spring 730 for elastically supporting the plunger 600 in a direction to close the flow path 130, One side of the core 500 is inserted into the chamber 140 formed in the valve body 100 , and one end of the core 500 is in surface contact with the bottom surface 141 of the chamber 140 .

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 is designated as downward, and the opposite side is designated as upward.

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

The valve body 100 has a hydrogen blocking solenoid valve 10a installed on the supply port 110 side 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 stack, and supplies the amount of hydrogen gas required from 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 hydrogen cutoff solenoid valve 10a, and the hydrogen cutoff solenoid valve 10a from the chamber ( 140) and a connection passage 133 extending toward the solenoid valve 10b for supplying hydrogen, and a discharge passage 132 extending toward the discharge port 120 to which the fuel stack is connected from the solenoid valve 10b for hydrogen supply. 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. is composed of a plunger 600 that opens and closes the flow path 130 formed therein or controls 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 and is provided with a valve seat 142 formed to protrude along the bottom surface 141 connected to the inlet portion of the flow path 130 , and the plunger 600 . It is opened or closed by the valve body 700 . 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 the shape of a spool in which flanges 410 are formed at both ends of a hollow cylindrical body, and a coil 401 is wound around the outer circumferential surface to generate a magnetic field when power is applied, and the inner core is a fixed iron core ( 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 a conducting wire that generates a magnetic field around the bobbin 400 when power is applied, and is tightly and uniformly wound around the outer circumferential surface of the bobbin 400 to form a cylindrical shape.

In addition, when power is applied to the coil 401 , the magnetic field generated by the coil 401 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 in the coil 401 and 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

In particular, 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 accommodating 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 while being supported in surface contact while being fixed to the case 200 . A support force to be fastened to the valve body 100 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 at the other end of the spring 730 in a portion protruding from the outer peripheral 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 includes a case 200, a pole piece 300, and a molding housing to fix the core 500 to the valve body 100. 800) is additionally 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 other end of the core 500 to transmit magnetic force.

The pole piece 300 is provided in a disk shape in which a 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 upper side of the pole piece 300 supports the flange 410 of the lower end of the bobbin 400 and the lower side supports the stepped surface 530 of the core 500 and transmits magnetic force. In this way, the case 200 and the pole piece 300 are in contact with the core 500 to provide a function of transmitting a magnetic force to the core 500 .

In addition, as shown in FIGS. 4 to 5 , the pole piece 300 is provided with a plurality of protrusions 320 protruding from one side of the outer circumferential surface and spaced apart from each other at equal intervals in the radial direction, and a protrusion at the lower end of the case 200 . It is inserted into the insertion groove 230 formed by being depressed in the longitudinal direction at a position corresponding to the 320 .

As described above, the insertion groove 230 of the case 200 is opened to the lower side, 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 to be described later 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 . .

The molding housing 800 is formed by being molded on the outside of the pole piece 300 and the case 200 and the inner part of the case 200 to completely fix the pole piece 300 and the case 200, and when power is applied, the core (500), the case 200, so that the magnetic force transmitted to the pole piece 300 is not lost.

The molding housing 800 is formed so that a surface facing the mounting surface 150 of the valve body 100 is spaced apart from the mounting surface 150 .

In addition, a process of assembling the core 500 will be described with reference to FIGS. 6 to 7 .

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 bolt 501 fastened to the screw groove 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 face of the upper end of the core 500, and is stepped from 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 part 502 and further includes a support part 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 , and the supporting force is applied to the case 200 in a direction to be 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, the protrusion height of the position fixing part 550 is preferably formed to be 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 step surface 530 . It is fixed to the case 200 .

Therefore, 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 part 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 support to the case 200 .

7 (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 the 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 of FIG. 7 (b), the support bolt 501 is fastened to the screw groove 540 and provides a supporting force 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.

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 in the case 200 through the support bolt 501 . It is desirable 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 . Prevents an 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. 8 to 10 .

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 .

The valve body 100 includes a mounting part 151 protruding toward the protrusion 320 from a place facing the protrusion 320 of the pole piece 300 among the mounting surface 150 .

In addition, the mounting part 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.

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 protrusion 320 of the pole piece 300 supported on the pole piece 300 is installed to be spaced apart from the protruding end of the mounting part 151 by the distance (a) set.

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. 11 , the operating structure of the solenoid valve 10 is described, in FIG. (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 , and is formed to protrude outward. 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.

And, 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. 11 ( b ), and the bobbin 400 and the case 200 in the core 500 ), 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 number of parts is reduced, the assembly tolerance generated while each part is assembled, and it can be assembled to have a set operating stroke, thereby preventing variations in the control section and improving the assembly process. Simple and easy to assemble.

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 can be reduced to minimize assembly tolerance, and the air gap caused by 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 540, the case is in close contact with the core and the pole piece is in close contact with the step surface to prevent an air gap, and as a deformable part is provided in the case, it is in surface contact with the core. It has the effect of preventing the occurrence of an air gap.

And, after assembling the lower end of the core so as to make surface contact with the bottom of the chamber, the solenoid valve is installed on the valve body using a fastening member passing through the protrusion protruding outward 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 stepped surface, it is spaced apart from the valve body, thereby reducing loss when transmitting magnetic force.

In the above, even though all the components constituting the embodiment of the present invention are described as being combined or operated 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. Accordingly, the embodiments disclosed in the present invention are not intended to limit the technical spirit of the present invention, but to explain, 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 construed 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
500: core 501: support bolt
502: head 503: body
504: support part 510: small diameter part
511: sliding groove 520: Daekyungbu
521: receiving groove 522: spring support surface
523: stopper 530: step surface
540: screw groove 550: position fixing part
600: plunger 700: valve body
710: absorber 720: plunger guide
730: spring 800: molding housing

Claims (14)

In the solenoid valve for opening and closing the flow path or controlling the degree of opening,
a bobbin wound with a coil that generates a magnetic field when power is applied;
a core coupled to the bobbin and magnetized by a magnetic field;
a plunger movably installed inside the core, moving in a direction to open the flow path when power is applied, and coupled to an end of the valve body to seal and close the flow path; and
and a spring elastically supporting the plunger in a direction to close the flow path.
The core is a solenoid valve, characterized in that one side is inserted into the chamber formed in the valve body, and one end is in surface contact with the bottom surface of the chamber.
The method of claim 1,
a case formed in a housing shape opened to one side to surround the bobbin and the coil, and to be seated on the other end of the core; and
a pole piece having a through hole into which the core is inserted, installed in the case, covering an open portion, and supporting the bobbin;
The solenoid valve further comprising a.
3. The method of claim 2,
The core is
a small diameter part inserted into the bobbin; and
a large-diameter part having a step difference from the small-diameter part and having an enlarged diameter to be inserted into the chamber of the valve body;
A solenoid valve comprising a.
4. The method of claim 3,
The pole piece is a solenoid valve, characterized in that supported on the step surface connecting the small-diameter portion and the large-diameter portion.
5. The method of claim 4,
The pole piece is provided with a plurality of protrusions protruding from the outer circumferential surface to the outside of the case, and is installed on the valve body via a plurality of fastening members.
6. The method of claim 5,
The pole piece is a solenoid valve, characterized in that it is installed in a spaced apart state from the valve body.
3. The method of claim 2,
a support bolt fastened to the core through an assembly hole formed in the case;
The solenoid valve further comprising a.
8. The method of claim 7,
The core has a position fixing portion formed to protrude from the other end so as to be inserted into the assembly hole;
A solenoid valve comprising a.
9. The method of claim 8,
The solenoid valve, characterized in that the support bolt is fastened to the core to provide a supporting force to the case in a direction in close contact with the core, so that the protrusion height of the position fixing part is formed to be lower than the thickness of the case.
8. The method of claim 7,
The case is a solenoid valve, characterized in that the portion in contact with one end of the core is formed to be inclined upwardly or downwardly.
In the solenoid valve for opening and closing the flow path or controlling the degree of opening,
A case in the shape of an enclosure opened to one side;
a pole piece installed to cover one side of the case open;
a bobbin installed in the case and wound with a coil that generates a magnetic field when power is applied;
a core coupled to the bobbin and magnetized by a magnetic field;
a plunger movably installed inside the core, moving in a direction to open the flow path when power is applied, and coupled to an end of the valve body to seal and close the flow path;
a spring elastically supporting the plunger in a direction to close the flow path; and
a support bolt fastened to the core through an assembly hole formed in the case;
A solenoid valve comprising a.
12. The method of claim 11,
a position fixing part protruding from the other end to be inserted into the core assembly hole;
A solenoid valve comprising a.
13. The method of claim 12,
The protrusion height of the position fixing part is formed to be lower than the thickness of the case so that the support bolt is fastened to the core to provide a supporting force to the case in a direction in close contact with the core.
12. The method of claim 11,
The case is a solenoid valve, characterized in that the portion in contact with one end of the core is formed to be inclined upwardly or downwardly.

Images