CN217874236U - Electromagnetic valve - Google Patents

Abstract

The solenoid valve comprises a valve seat and a piston assembly, wherein at least part of the piston assembly is positioned in the valve seat, and the valve seat is in limit connection with the piston assembly; the piston assembly comprises a main valve core, a one-way component and a sealing assembly, the one-way component is positioned in the main valve core, the sealing assembly is positioned above the main valve core in the axial direction, and the sealing assembly is in limit connection with the main valve core; the sealing assembly comprises a first sealing element and a first limiting element, the first limiting element is in limiting connection with the first sealing element, and the first sealing element is fixedly connected or in limiting connection with the main valve core; like this first locating part is spacing to first sealing member footpath, and first sealing member footpath is difficult for taking place the displacement in radial, is favorable to strengthening first sealing member footpath in radial stability, is favorable to improving sealed stability.

Description

Electromagnetic valve

Technical Field

The utility model relates to a fluid control technical field, in particular to solenoid valve.

Background

The solenoid valve includes a piston assembly including piston rings for sealing against a piston valve seat, however the sealing of the piston rings over time is prone to leakage within the solenoid valve.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a solenoid valve is favorable to improving the sealing performance of solenoid valve.

In order to solve the above technical problem, an embodiment of the present invention provides a solenoid valve, including a valve seat and a piston assembly, the solenoid valve has a valve cavity and a first valve port, the piston assembly is located in the valve cavity, a wall forming the valve cavity includes the valve seat, the valve seat is in sliding fit with the piston assembly, the valve cavity includes a first cavity, at least a portion of the first cavity and at least a portion of the first valve port are located on two sides of the piston assembly; the piston assembly comprises a main valve core, a sealing assembly and a one-way component, the piston assembly is provided with a first channel, at least part of the one-way component is positioned in the first channel, the one-way component enables the first channel to conduct the first valve port and the first cavity in a one-way mode, the sealing assembly is fixedly connected or in a limiting mode with the main valve core, the sealing assembly comprises a first sealing element and a first limiting piece, at least part of the first limiting piece is positioned on the inner side of the first sealing element in the radial direction of the solenoid valve, and the first sealing element is in contact with the valve seat.

The embodiment of the application provides a solenoid valve includes piston assembly, and piston assembly includes first sealing member and first locating part, and first locating part is spacing to first sealing member footpath like this, and first sealing member footpath is radially difficult for taking place the displacement, is favorable to strengthening first sealing member footpath at radial stability, is favorable to improving sealed stability.

Drawings

Fig. 1 is a schematic perspective view of a solenoid valve according to an embodiment of the present invention;

FIG. 2 isbase:Sub>A sectional view of the solenoid valve of FIG. 1, taken along line A-A;

FIG. 3 is a front view of the valve seat of FIG. 2;

FIG. 4 is a cross-sectional view of the valve seat of FIG. 3 taken along line B-B;

FIG. 5 is a perspective view of the piston assembly of FIG. 2;

FIG. 6 is a cross-sectional structural view of the piston assembly of FIG. 5 taken along line C-C;

FIG. 7 is an enlarged partial view of the piston assembly of FIG. 6;

FIG. 8 is a schematic front view of the main spool of FIG. 5;

FIG. 9 is a schematic cross-sectional view of the main spool of FIG. 8 taken along line D-D;

FIG. 10 is a perspective view of the fixing member of FIG. 6;

FIG. 11 is a perspective view of the first seal of FIG. 6;

fig. 12 is a schematic perspective view of the second limiting member in fig. 6;

fig. 13 is a schematic perspective view illustrating a first position-limiting member according to another embodiment.

Detailed Description

In order to make the technical field of the present invention better understand, the present invention will be further explained with reference to the accompanying drawings and specific embodiments.

In the following description of the embodiments, for the sake of easy understanding, terms indicating directions (for example, "upper", "lower", "upper end face", and the like) are appropriately used, and it is needless to say that the terms do not limit the present invention, and the terms are used to exemplify a normally closed type electromagnetic valve in which the moving direction of the movable core is "upper" when the electromagnetic valve is opened and energized and the moving direction of the movable core is "lower" when the electromagnetic valve is closed and de-energized. The "axial direction" herein refers to a moving direction or an up-down direction of the plunger 31, and the "radial direction" is a direction perpendicular to the axial direction.

Referring to fig. 1 to 9, a solenoid valve 100 according to an embodiment of the present invention includes: coil assembly 1, iron core subassembly 2, valve seat 3, piston assembly 4 and valve body 5. Coil pack 1 cover is located iron core subassembly 2, iron core subassembly 2 and 3 fixed connection of disk seat, and fixed connection is including welding, bonding or thread tightening, and in this embodiment, fixed mode is the welding, and in this embodiment, piston assembly 4 is located 3 inner chambers of disk seat, piston assembly 4 and 3 clearance fit of disk seat.

Referring to fig. 2, the coil assembly 1 includes a magnetizer 11, an injection molding casing 12 and a coil 14, the magnetizer 11 and the injection molding casing 12 are fixed by clamping, at least a portion of the coil 14 is located in the injection molding casing 12, in this embodiment, the coil 14 and the injection molding casing 12 are integrally injection molded, or may be separately molded and then assembled and connected; the iron core assembly 2 comprises a static iron core 21, a movable iron core 22, a sleeve 23 and an elastic element 24; the static iron core 21 and the sleeve 23 are welded and fixed, in the embodiment, the static iron core 21 and the sleeve 23 are fixed by laser welding, the movable iron core 22 is located below the static iron core 21 and at least partially located in the sleeve 23, and the static iron core 21 and the movable iron core 22 are connected through an elastic element 24; the first contact surface 214 of quiet iron core 21 and the first contact surface 111 butt of magnetizer 11, quiet iron core 21 passes through screw 25 fixed connection with magnetizer 11, the first end 231 of sleeve 23 and the second concave part 212 welded fastening of quiet iron core 21, in this embodiment, sleeve 23 and quiet iron core 21 pass through laser welding fixed, riveting fastening behind the second end 232 of sleeve 23 and the 3 interference fit of valve seat, later 3 inner walls of valve seat and 23 outer wall welded fastening of sleeve, in this embodiment, valve seat 3 and sleeve 23 pass through the stove and weld fixed. The movable iron core 22 is provided with a first groove 222 and a supporting surface 221, the supporting surface 221 is arranged at the bottom of the first groove 222, and the supporting surface 221 extends along the radial direction of the electromagnetic valve 100; the elastic element 24 is arranged in the first groove 222, the first end portion 241 of the elastic element 24 is abutted with the first wall 211 of the fixed iron core 21, the second end portion 242 of the elastic element 24 is abutted with the supporting surface 221 of the movable iron core 22, at least part of the movable iron core 22 is positioned in the sleeve 23, the movable iron core 22 is in clearance fit with the sleeve 23, and the movable iron core 22 is abutted with the second end portion 242 of the elastic element 24 along the axial direction for limiting. Along the axial of solenoid valve 100, the bottom joint of movable iron core 22 has sealing member 223, and sealing member 223 is spacing with piston assembly 4 counterbalance, and piston assembly 4 is located the sealing member 223 below.

Referring to fig. 2 and 4, the valve seat 3 has a connecting structure 31, the connecting structure 31 is disposed on an outer side wall of the valve seat 3, in this embodiment, the connecting structure 31 is an external thread structure, and a second sealing member 34 is disposed axially above the connecting structure 31 to prevent the solenoid valve 100 from leaking; the solenoid valve 100 has a valve chamber 101 and a first valve port 102, the wall forming the valve chamber 101 comprises the valve seat 3, the piston assembly 4 is located in the valve chamber 101, the piston assembly 4 is capable of opening and closing the first valve port 102, and the first valve port 102 is formed on at least part of the wall of the valve body 5. The valve seat 3 further has a first guide 33, the first guide 33 is formed on at least a part of the wall of the valve chamber 101, the piston assembly 4 is slidably connected with the first guide 33, the valve chamber 101 comprises a first chamber 32, the wall of the first guide 33 and at least a part of the wall of the piston assembly 4 form a part of the first chamber 32, and the first chamber 32 and at least a part of the first valve port 102 are located on both sides of the piston assembly 4.

Referring to fig. 2 and 9, piston assembly 4 includes a main valve element 41 and a first resilient element 44, wherein first resilient element 44 is fixedly connected or captively connected to main valve element 41, and in the present embodiment, first resilient element 44 is snap-fitted to main valve element 41; main valve element 41 has a first passage 416 and a first wall 418, first wall 418 facing core assembly 2, first passage 416 is formed in first wall 418, first passage 416 has a first port 4165 in first wall 418, main valve element 41 also has a second passage 417, second passage 417 penetrates main valve element 41 in the axial direction of solenoid valve 100, second passage 417 has a second port 4171 in first wall 418, core assembly 2 is capable of closing second port 4171, and second passage 417 communicates with first port 102; first port 4165 is closer to the outer side wall of main poppet 41 than second port 4171 is in the radial direction of main poppet 41. The first passage 416 has a third port 4161 in the wall of the second passage 417, the third port 4161 communicating with the second passage 417, the third port 4161 being located inside the main spool 41, the third port 4161 being located at the intersection of the first passage 416 and the second passage 417, and specifically, in the present embodiment, the wall of the first passage 416 is formed by a large diameter section 4162, a small diameter section 4163, and a reduced diameter section 4164, the large diameter section 4162, the small diameter section 4163, and the reduced diameter section 4164 being sequentially arranged in the axial direction of the piston assembly 4, the reduced diameter section 4164 being more distant from the core assembly 2 than the large diameter section 4162, the small diameter section 4163, the large diameter section 4162 being more distant from the core assembly 2 than the reduced diameter section 4164, the small diameter section 4163, and the large diameter section 4162 communicating with the first chamber 32 of the solenoid valve 100.

Main valve element 41 further has a first protrusion 413 and an upper step 414, where the first protrusion 413 is located farther from iron core assembly 2 than upper step 414, the first protrusion 413 is formed on at least a portion of the outer side wall of main valve element 41, one end of first elastic element 44 is connected to first protrusion 413 in a limiting manner, and the other end of first elastic element 44 abuts against valve body 5; the upper step 414 is formed on the outer side wall of the main valve element 41, the upper step 414 is distributed along the circumferential direction of the main valve element 41, the upper step 414 has a first connecting portion 4141 and a supporting portion 4142, in this embodiment, the first connecting portion 4141 is a screw structure distributed along the circumferential direction of the main valve element 51, or other structures having a fixing or limiting function may be used, the supporting portion 4142 faces the core assembly 2, and the supporting portion 4142 extends in the radial direction of the solenoid valve 100.

Referring to fig. 2, 6, and 9, main spool 41 further includes a one-way member 40, one-way member 40 is at least partially located within main spool 41, one-way member 40 includes a mounting portion 43, main spool 41 includes a mating portion 419, mating portion 419 is formed in first passage 416 of main spool 41, mounting portion 43 and mating portion 419 are fixedly or captively connected, in this embodiment, mounting portion 43 and mating portion 419 are captively retained by an interference fit; check member 40 further includes a sub-spool 42, sub-spool 42 being movable relative to mounting portion 43, solenoid valve 100 having a second port 415, sub-spool 42 being capable of opening and closing second port 415, second port 415 being located in first passage 416, second port 415 being formed in throat section 4164, second port 415 being located between first port 4165 and third port 4161.

The check component 40 further includes a second elastic element 45, the sub valve element 42 is at least partially sleeved on the second elastic element 45, in this embodiment, the mounting portion 43 is a pressing sheet, the mounting portion 43 may also be of other structures having a limiting function, the mounting portion 43 is in interference fit with the large-diameter section 4162, the piston assembly 41 further has a second supporting surface 4138, the second supporting surface 4138 is located at the large-diameter section 4162, the second supporting surface 4138 faces upward along the axial direction of the electromagnetic valve 100, the mounting portion 43 abuts against the second supporting surface 4138, and the second supporting surface 4138 axially limits the mounting portion 43; the second elastic element 45 is sleeved on the sub-valve element 42, the second elastic element 45 has a first end portion 451 and a second end portion 452, the first end portion 451 is located axially below the second end portion 452, the sub-valve element 42 has a first supporting surface 421, the first supporting surface 421 extends along the radial direction of the solenoid valve 100, the first end portion 451 of the second elastic element 45 is abutted against the first supporting surface 421 of the sub-valve element 42 for limiting, and the second end portion 452 of the second elastic element 45 is abutted against the mounting portion 43 for limiting.

Referring to fig. 2, 6 and 7, the piston assembly 4 includes a sealing assembly 46, the sealing assembly 46 is fixedly connected or position-limited to the main spool 41, the sealing assembly 46 includes a first sealing element 461 and a first position-limiting element 462, at least a portion of the first position-limiting element 462 is located inside the first sealing element 461 along a radial direction of the solenoid valve 100, the first sealing element 461 is in contact with the valve seat 3, and the first sealing element 461 is fixedly connected or position-limited to the supporting portion 4142 of the upper stepped portion 414. The first sealing element 461 comprises a first axial segment 4611 and a first radial segment 4612, the first axial segment 4611 extends from the first radial segment 4612 to the first cavity 32, and the first limiting member 462 is located inside the first axial segment 4611, so that the first limiting member 462 radially limits the first sealing element 461, and the first axial segment 4611 is not easily displaced in the radial direction, which is beneficial to enhancing the stability of the first axial segment 4611 in the radial direction; the first axial section 4611 is inclined with respect to the axis of the solenoid valve 100 so that the first axial section 4611 forms a one-way communication structure with the valve seat 3 to partition the first chamber 32 and the valve chamber 101. First radial section 4612 is fixedly connected or connected to main valve element 41 in a limited manner, and in this embodiment, first radial section 4612 abuts against support portion 4142 of upper step portion 414; in another embodiment, first radial segment 4612 may be adhesively secured to support portion 4142, or first radial segment 4612 may be integrally fitted to main spool 41 through a rubber vulcanization process, thereby effecting securement of first seal 461 to main spool 41. First axial segment 4611 has a free end 4610 and a fixed end 4610', free end 4610 being located where first axial segment 4611 is closest to valve seat 3, free end 4610 being in contact with first guide 33 of valve seat 3 such that free end 4610 and valve seat 3 form a sealing structure such that first seal 461 relatively separates first chamber 32 and valve chamber 101, fixed end 4610' being connected to first radial segment 4612. In a more specific embodiment, the first axial section 4611 is inclined with respect to the axis of the solenoid valve 100, further, the free end 4610 of the first axial section 4611 is closer to the valve seat 3 than the fixed end 4610 'of the first axial section 4611 is in the radial direction of the solenoid valve 100, the free end 4610 of the first axial section 4611 is closer to the first chamber 32 than the fixed end 4610' of the first axial section 4611 is in the axial direction of the solenoid valve 100, the first axial section 4611 has a sealing surface 4611', at least a part of which is formed on the outer side wall of the first axial section 4611, and the sealing surface 4611' is in sliding contact with the first guide 33, so that the sealing surface 4611 'forms a sealing structure with the valve seat 3 to separate the first chamber 32 from the valve chamber 101, and particularly, the sealing surface 4611' forms a one-way conduction structure with the first guide 33. First retaining element 462 includes a second axial segment 4621 and a second radial segment 4622, where second axial segment 4621 extends from second radial segment 4622 toward first cavity 32, and second radial segment 4622 is fixedly connected or retained with main spool 41, in this embodiment, main spool 41 retains second radial segment 4622 radially, in another embodiment, second radial segment 4622 may be fixed with main spool 41 by snap fit or adhesive; referring to fig. 12, the second axial segment 4621 may have a plurality of segments, in this embodiment, sixteen second axial segments 4621 are uniformly distributed on the first limiting member 462; referring to fig. 13, in another embodiment, the second axial segment 4621 has only one segment; along the radial direction of the electromagnetic valve 100, the second axial section 4621 is located inside the first axial section 4611, the first axial section 4611 is closer to the first guide portion 33 of the valve seat 3 relative to the second axial section 4621, the second axial section 4621 can radially limit the first axial section 4611, and thus the second axial section 4621 can radially limit the first axial section 4611, so that the first axial section 4611 can move within a limited range, and the stability of the movement of the first axial section 4611 is facilitated.

Referring to fig. 2, 6 and 7, the sealing assembly 46 further includes a fixing element 463, the fixing element 463 is fixedly connected or connected to the main valve core 41 in a limiting manner, and the fixing element 463 is closer to the first chamber 32 than the first radial section 4612 in the axial direction of the solenoid valve 100, so that the first radial section 4612 is not easily displaced in the axial direction, which is beneficial to enhancing the stability of the first radial section 4612 in the axial direction; the fixing piece 463 includes a connecting portion 4631 and a limiting portion 4632, the connecting portion 4631 is formed on the inner side wall of the fixing piece 463, the fixing piece 463 may be fixedly connected with the main valve core 41 by welding, clamping, and screwing, in this embodiment, the connecting portion 4631 is screwed with the main valve core 41; the position-limiting portion 4632 is located at the bottom of the fixing element 463, the position-limiting portion 4632 contacts with the first radial section 4612, the position-limiting portion 4632 limits the position of the first radial section 4612 in the axial direction of the solenoid valve 100, specifically, the connecting portion 4631 is fixedly connected or connected in a limiting manner with the first connecting portion 4141 of the upper step portion 414, in this embodiment, the connecting portion 4631 is in threaded connection with the first connecting portion 4141, so that the fixing element 463 is fixedly connected with the main valve element 41 through the first connecting portion 4141, and the sealing assembly 46 is integrated with the main valve element 41, so that the sealing assembly 46 is more easily assembled with the main valve element 41. In the radial direction of the solenoid valve 100, the second axial section 4621 is located between the first axial section 4611 and the connecting portion 4631, in this embodiment, the first axial section 4611 is spaced from the second axial section 4621, and the connecting portion 4631 is spaced from the second axial section 4621, so that the second axial section 4621 is located between the first axial section 4611 and the fixing member 463, so that the sealing assembly 46 is more compact; in another embodiment, the first axial segment 4611 is in clearance fit with the second axial segment 4621, and the fixing element 463 is in limit connection with the second radial segment 4622; or, the connecting portion 4631 is in clearance fit with the second axial segment 4621, and the second axial segment 4621 axially limits the first axial segment 4611. Referring to fig. 10, the fixing element 463 further has a fastening portion 4633, and the fastening portion 4633 of the fixing element 463 has an outer hexagonal structure, and in other embodiments, may have other polygonal structures, or structures for facilitating fastening.

Referring to fig. 2, the valve body 5 has a first flow passage 51 and a second flow passage 52, the first flow passage 51 communicates with the valve chamber 101, the second flow passage 52 communicates with the second passage 417, the first flow passage 51 may serve as an inlet passage of the solenoid valve 100, and the second flow passage 52 may serve as an outlet passage of the solenoid valve 100. The valve body 5 has a second projection 53, the second projection 53 is formed on at least a part of the wall of the valve body 5, the second projection 53 is farther from the core assembly 2 than the piston assembly 4, and the first port 102 is formed in the second projection 53; the valve body 5 also has a third seating surface 54, the third seating surface 54 being formed in the wall of at least part of the valve chamber 101, the third seating surface 54 extending in the radial direction of the solenoid valve 100, the first elastic element 44 abutting against the third seating surface 54. When the electromagnetic valve 100 is in a closed state, the sub-spool 42 moves upward in the axial direction, the first cavity 32 is communicated with the second flow passage 52, and the sealing assembly 46 conducts the valve cavity 101 to the first cavity 32 in a one-way manner, which is beneficial to reducing the internal leakage of the electromagnetic valve 100.

It should be noted that: although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can make modifications and substitutions on the present application, and all technical solutions and modifications thereof without departing from the spirit and scope of the present application should be covered by the claims of the present application.

Claims (8)

1. A solenoid valve (100) comprising a valve seat (3) and a piston assembly (4), the solenoid valve (100) having a valve chamber (101) and a first valve port (102), the piston assembly (4) being located in the valve chamber (101), a wall forming the valve chamber (101) comprising the valve seat (3), the valve seat (3) being in sliding fit with the piston assembly (4), the valve chamber (101) comprising a first chamber (32), at least part of the first chamber (32) and at least part of the first valve port (102) being located on either side of the piston assembly (4); characterized in that the piston assembly (4) comprises a main valve core (41), a sealing assembly (46) and a one-way component (40), the piston assembly (4) is provided with a first passage (416), at least part of the one-way component (40) is positioned in the first passage (416), the one-way component (40) enables the first passage (416) to conduct the first valve port (102) and the first cavity (32) in a one-way mode, the sealing assembly (46) is fixedly connected or in a limiting mode with the main valve core (41), the sealing assembly (46) comprises a first sealing element (461) and a first limiting element (462), at least part of the first limiting element (462) is positioned inside the first sealing element (461) in the radial direction of the solenoid valve (100), and the first sealing element (461) is in contact with the valve seat (3).

2. The solenoid valve according to claim 1, characterized in that said first seal (461) comprises a first axial segment (4611) and a first radial segment (4612), said first axial segment (4611) extending from said first radial segment (4612) towards said first chamber (32), said first radial segment (4612) being fixedly or captively connected to said main spool (41), said first axial segment (4611) being inclined with respect to the axis of said solenoid valve (100), part of said first axial segment (4611) being in contact with said valve seat (3), said first retaining element (462) being located inside said first axial segment (4611) in the radial direction of said solenoid valve (100).

3. The solenoid valve according to claim 2, characterized in that the first axial section (4611) comprises a free end (4610) and a fixed end (4610 '), the free end (4610) of the first axial section (4611) is closer to the first chamber (32) than the fixed end (4610 ') of the first axial section (4611) is in an axial direction of the solenoid valve (100), the free end (4610) of the first axial section (4611) is closer to the valve seat (3) than the fixed end (4610 ') of the first axial section (4611) is in a radial direction of the solenoid valve (100), and the free end (4610) of the first axial section (4611) is in contact with the valve seat (3).

4. A solenoid valve according to any one of claims 2 or 3, characterised in that the sealing assembly (46) comprises a fixing member (463), the fixing member (463) comprising a connecting portion (4631) and a limiting portion (4632), the connecting portion (4631) being fixedly or limitedly connected to the main spool (41), the limiting portion (4632) being in contact with the first radial section (4612), the fixing member (463) being closer to the first chamber (32) than the first radial section (4612) in the axial direction of the solenoid valve (100).

5. The solenoid valve according to claim 4, characterized in that the main spool (41) comprises an upper step (414), the upper step (414) having a first connecting portion (4141) and a support portion (4142), the first connecting portion (4141) extending axially along the solenoid valve (100), the support portion (4142) extending radially along the solenoid valve (100), the support portion (4142) contacting a first sealing member, the first connecting portion (4141) and the fixing member (463) being fixedly or position-limited connected.

6. The electromagnetic valve according to claim 5, characterized in that the free end (4610) of the first axial section (4611) comprises a sealing surface (4611 '), at least part of the sealing surface (4611') being formed on an outer lateral wall of the first axial section (4611); the valve seat (3) further comprises a first guide portion (33), the wall forming the first chamber (32) comprises a wall of the first guide portion (33), and the sealing surface (4611') is in sliding contact with the first guide portion (33).

7. The solenoid valve according to claim 6, wherein the first limiting member (462) comprises a second radial segment (4622) and a second axial segment (4621), the second axial segment (4621) extending from the second radial segment (4622) towards the first chamber (32), the second radial segment (4622) being fixedly or limitedly connected to the main valve spool (41), the second axial segment (4621) being located inside the first axial segment (4611) in a radial direction of the solenoid valve (100).

8. A solenoid valve according to claim 7 characterised in that in the radial direction of the solenoid valve (100) the second axial section (4621) is located between the first axial section (4611) and the connection (4631), at least one of the first axial section (4611) and the connection (4631) being arranged at a distance from the second axial section (4621).

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