CN215293665U - Electric valve - Google Patents

Abstract

The utility model provides an electrically operated valve, includes connecting piece, valve core case and valve port spare, and some valve port spare are located the chamber that holds that connecting piece and valve core case assembly formed, and the connecting piece includes first step portion and bead, and at least partial bead is embedded into in the valve port spare, presses the tolerance of highly compensating the course of working in the embedding valve port spare through the bead, is favorable to guaranteeing the up end and the first step portion butt of valve core case to be favorable to guaranteeing welding quality.

Description

Electric valve

Technical Field

The present application relates to an electrically operated valve.

Background

In an air conditioning system or a thermal management system, an electric valve is often used as a throttling element, and the electric valve can perform forward or backward throttling on working fluid according to the requirements of different working modes of the system. The electric valve comprises a valve core seat assembly, the inventor knows that the valve core seat assembly comprises a connecting piece and a valve core seat, the connecting piece and the valve core seat are fixed by laser welding, and how to ensure the welding quality of the connecting piece and the valve core seat is a technical problem to be improved.

SUMMERY OF THE UTILITY MODEL

The application aims to provide an electric valve which is beneficial to ensuring the welding quality of a connecting piece and a valve core seat.

In order to achieve the purpose, the following technical scheme is adopted in the application:

the utility model provides an electrically operated valve, includes connecting piece, valve core case and valve mouth spare, the connecting piece with the valve core case assembly forms and holds the chamber, and part the valve mouth spare is located hold the chamber, the connecting piece includes first step portion and bellying, follows the radial of connecting piece, the bellying certainly the inside wall of connecting piece is inside protruding to be formed, the bellying includes the bead, follows the axial of connecting piece, the bead certainly the lower extreme face downward bulge of bellying forms, at least part the bead imbeds in the valve mouth spare, the up end of valve core case with first step portion butt.

The application provides an electrically operated valve, including connecting piece, valve core case and valve port spare, some valve port spare are located the chamber that holds that connecting piece and valve core case assembly formed, and the connecting piece includes first step portion and bead, and at least part bead is embedded into in the valve port spare, presses the tolerance that highly compensates the course of working in the embedding valve port spare through the bead, is favorable to guaranteeing the up end and the first step portion butt of valve core case to be favorable to guaranteeing welding quality.

Drawings

Figure 1 is a cross-sectional view of one embodiment of an electrically operated valve;

FIG. 2 is a cross-sectional structural schematic view of the valve member;

FIG. 3 is a cross-sectional view of the connecting socket;

FIG. 4 is a perspective view of the connecting base;

FIG. 5 is a cross-sectional structural schematic view of the cartridge seat assembly;

FIG. 6 is a cross-sectional view of the connector of FIG. 5;

FIG. 7 is a cross-sectional view of the cartridge seat of FIG. 5;

FIG. 8 is a cross-sectional view of the connector assembled with the valve cartridge;

fig. 9 is a partially enlarged schematic view of a portion a in fig. 5.

Detailed Description

The present application is further described with reference to the following figures and specific examples:

referring to fig. 1, the electric valve 100 may be applied to a refrigerant circulation flow path in an air conditioning system or a thermal management system, the electric valve 100 includes a driving member 1, a valve member 2, and a valve body member 3, a part of the valve member 2 is located in a valve body cavity 30 formed by the valve body member 3, the valve member 2 is connected with the valve body member 3, the driving member 1 is located at the periphery of another part of the valve member 2, the driving member 1 is connected with the valve body member 2 or the driving member 1 is connected with the valve body member 3, and the electric valve 100 is electrically and/or signally connected with the outside through the driving member 1.

Referring to fig. 1, the driving component 1 includes an outer casing 11, a stator assembly 12 and a connecting port 13, the stator assembly 12 is used as an injection insert and is integrally injection molded to form the outer casing 11, the outer casing 11 and the connecting port 13 can be assembled or integrally formed, in this embodiment, the outer casing 11 and the shell of the connecting port 13 are integrally injection molded, the connecting port 13 includes a pin 131, one end of the pin 131 is located in the outer casing 11 and is electrically connected and/or signal connected with the stator assembly 12, and the other end of the pin 131 is located in a socket cavity formed by the connecting port 13 and is used for being electrically connected and/or signal connected with the outside.

Referring to fig. 1 and 2, the valve component 2 includes a rotor assembly 21, a screw rod assembly 22, a stop assembly 23, a valve core assembly 24, a valve core seat assembly 25, a connecting seat 26, and a sleeve 27, the screw rod assembly 22 includes a screw rod 221, the rotor assembly 21 is connected and fixed with one end of the screw rod 221, the other end of the screw rod 221 is in threaded connection with the valve core assembly 24, the stop assembly 23 is located at the periphery of a portion of the screw rod 221, at least a portion of the stop assembly 23 is located in a rotor cavity 210 formed by the rotor assembly 21, and the stop assembly 23 is located in the rotor cavity 210, which is beneficial to reducing the axial height of the valve component 2, and is further beneficial to reducing the axial height of the electric valve 100. The connecting seat 26 is located at a portion of the screw rod assembly 22 and a portion of the periphery of the valve core assembly 24, the valve core seat assembly 25 is located at another portion of the periphery of the valve core assembly 24, the connecting seat 26 is fixedly connected with the valve core seat assembly 25, the sleeve 27 is sleeved on the periphery of the rotor assembly 21, and the sleeve 27 is fixedly connected with the connecting seat 26.

Referring to fig. 1 to 3, the rotor assembly 21 includes a magnetic rotor 211 and a fixing member 212, the fixing member 212 is used as an injection molding insert to form the magnetic rotor 211 by injection molding, and the rotor assembly 21 is connected and fixed to the lead screw 221 through the fixing member 212, specifically, the fixing may be achieved by welding, bonding, interference fit, or the like. The stop assembly 23 includes a stop seat 231 and a connecting plate 232, the stop seat 231 may be made of a plastic material, and the connecting plate 232 is connected and fixed with the stop seat 231, specifically, the connecting plate 232 may be an injection molding insert, and the stop seat 231 is formed by injection molding. The stopping seat 231 is located at a part of the periphery of the screw rod 221, and the stopping seat 231 is connected and fixed with the connecting seat 26 through the connecting plate 232. In this embodiment, the connecting plate 232 is fixed to the connecting seat 26 by riveting, specifically, an end face of the connecting plate 232 abuts against the first step face 261 of the connecting seat 26, the connecting seat 26 includes a riveting portion 262, and the bending riveting portion 262, and the riveting portion 262 compresses the connecting plate 232 between the first step face 261 and the riveting portion 262, so as to realize the riveting fixation of the connecting plate 232 and the connecting seat 26. Of course, as other embodiments, the connection plate 232 and the connection seat 26 may also be fixed by welding, or bonding, or interference fit, etc. The stopping assembly 23 further includes a spiral guide rail 233, a stopping rod 234 and a stopping ring 235, the spiral guide rail 233 is sleeved on the periphery of the stopping seat 231, the spiral guide rail 233 is connected and fixed or connected and limited with the stopping seat 231, the spiral guide rail 233 supports the stopping ring 235, and the stopping ring 235 can slide along the spiral track of the spiral guide rail 233 relative to the spiral guide rail 233 and is limited by the spiral guide rail 233. The stopping rod 234 is fixed or connected to the rotor assembly 21, and specifically, the stopping rod 234 may be fixed or connected to the fixing member 212 of the rotor assembly 21. When the rotor assembly 21 drives the stopping rod 234 to rotate, the stopping rod 234 can abut against the stopping ring 235 so as to drive the stopping ring 235 to slide relative to the spiral guide 233, and in the sliding process of the stopping ring 235, the motion track of the stopping ring is limited by the spiral guide 233. The electric valve 100 limits the movement stroke of the valve core assembly 24 through the stop assembly 23.

Referring to fig. 1 and 4, the valve core assembly 24 includes a valve core 241 and a nut member 242, the valve core 241 is located at a part of the outer periphery of the nut member 242, the valve core 241 and the nut member 242 are connected and fixed or limited, specifically, the valve core 241 may be an injection molding insert, the nut member 242 is formed by injection molding, and the valve core assembly 241 is in threaded connection with the lead screw 221 through the nut member 242. The nut 242 includes a limiting portion 2421, a portion of the limiting portion 2421 protrudes out of an outer side wall of the valve core 241 along a radial direction of the valve core 241, and the limiting portion 2421 is a non-rotating body. The connecting seat 26 includes a matching portion 263, the matching portion 263 is in limit fit with the limiting portion 2421, and is used for limiting the circumferential rotation of the nut 242, so as to limit the circumferential rotation of the valve core assembly 24, and the limit matching structure of the limiting portion 2421 and the matching portion 263 can have various forms as long as the circumferential rotation of the valve core assembly 24 can be limited.

Referring to fig. 2 and 3, the lead screw assembly 22 further includes a bearing 222 and a collar 223, the bearing 222 is located at the outer periphery of the lead screw 221, the connecting seat 26 is located at the outer periphery of the bearing 222, and the connecting seat 26 includes a second stepped surface 264, and the second stepped surface 264 is located farther from the riveting portion 262 than the first stepped surface 261 along the axial direction of the connecting seat 26. The bearing 222 is in transition fit with the connecting seat 26, and one end surface of the bearing 222 abuts against the second stepped surface 264 and the other end surface of the bearing 222 abuts against the end surface of the stop seat 231 and/or the end surface of the connecting plate 232 in the axial direction of the valve member 2. The sleeve 223 is located on the outer periphery of the screw rod 221, and the sleeve 223 is fixedly connected with the screw rod 221, specifically, the sleeve 223 and the screw rod 221 may be fixed by interference fit, welding, bonding, or the like. The screw 221 includes a flange portion 2211 projecting in the radial direction thereof, the bearing 222 is located between the flange portion 2211 and the collar 223 in the axial direction of the valve member 2, and the screw 221 is axially restrained by the flange portion 2211 abutting against the bearing 222 or the collar 223 abutting against the bearing 222.

Thus, when the rotor assembly 21 rotates under the excitation of the magnetic field of the stator assembly 12, the rotor assembly 21 drives the screw rod 221 to rotate together, the screw rod 221 rotating in the circumferential direction is in threaded connection with the valve core assembly 24, and under the condition that the screw rod 221 is limited in the axial direction and the valve core assembly 24 is limited in the circumferential direction, the valve core assembly 24 can perform linear reciprocating motion in the axial direction of the valve member 2 under the action of threads.

Referring to fig. 1, 5-8, the valve cartridge seat assembly 25 includes a connection member 251, a valve cartridge seat 252, and a valve port 253, and the valve port 253 may be made of a plastic material, and in this embodiment, the valve port 253 is injection molded from a Polyetheretherketone (PEEK) material. The connecting member 251 is fixedly connected to the valve core seat 252, and in this embodiment, the connecting member 251 is fixedly connected to the valve core seat 252 by laser welding, which is because laser welding has advantages of convenient operation, fast welding speed, small welding deformation, and the like, and is mostly applied to precision welding of micro and small parts. The connector 251 includes a first step portion 2511 and a protrusion portion 2512, and the protrusion portion 2512 is formed to protrude inward from an inner sidewall of the connector 251 in a radial direction of the connector 251. The valve core holder 252 includes a mounting portion 2521, the mounting portion 2521 forms a mounting cavity 2522, the mounting portion 2521 includes a second stepped portion 2523 and a third stepped portion 2524, and the second stepped portion 2523 is disposed farther from an opening of the mounting cavity 2522 than the third stepped portion 2524 in the axial direction of the valve core holder 252. Part of the connecting element 251 is located in the mounting cavity 2522, the receiving cavity 254 is formed by assembling the connecting element 251 with the valve core seat 252, part of the valve port 253 is located in the receiving cavity 254, the valve port 253 comprises a valve port part which forms the valve port 2531, and the opening degree of the valve port 2531 can be adjusted by moving the valve core assembly 24 close to or away from the valve port 2531, so that fluid can be throttled or switched at the valve port 2531. By arranging the valve port piece 253 to be made of PEEK material, compared with a valve port formed by metal material, the electric valve 100 can form better abutting seal between the valve core assembly 24 and the valve port part when the valve is closed, which is beneficial to improving internal leakage. In order to prevent the valve port 253 from axially moving along with the valve core assembly 24, the valve port 253 needs to be limited and fixed, specifically, the upper end surface of the valve port 253 is arranged to abut against the protrusion 2512, the lower end surface of the valve port 253 abuts against the second step 2523, and meanwhile, to avoid over-constraint, a gap is reserved between the lower end surface of the connecting member 251 and the third step 2524, however, due to machining tolerance, a situation that the lower end surface of the connecting member 251 contacts with the third step 2524 may also occur, that is, a gap or contact is reserved between the lower end surface of the connecting member 251 and the third step 2524, and the end surface of the connecting member 251 located in the mounting cavity 2522 is defined as the lower end surface. In addition, in order to ensure the quality of the laser welding between the connecting member 251 and the valve seat 252, it is necessary to ensure that the welding portion abuts, that is, the upper end surface of the valve seat 252 abuts against the first step portion 2511, and the end surface of the valve seat 252 close to the connecting seat 26 is defined as the upper end surface along the axial direction of the valve component 2. However, in actual production, due to machining tolerance, a gap may be left between the upper end surface of the valve plug seat 252 and the first step 2511, which may cause the laser welding to be unstable and affect the welding quality.

In order to solve the above problem, referring to fig. 5 to 9, the protrusion 2512 further includes an annular rib formed to protrude downward from a lower end surface of the protrusion 2512 in the axial direction of the connector 251. During assembly of the cartridge seat assembly 25, at least a portion of the rib is able to press fit into the valve port 253 from the upper end surface of the valve port 253. In this way, the height portion embedded in the valve opening piece 253 can be pressed by the rib to compensate for the machining tolerance, so that the upper end surface of the valve core seat 252 is favorably ensured to abut against the first step portion 2511, and the laser welding quality is favorably ensured. In this embodiment, the ribs include a first rib 2513 and a second rib 2514, the central axis of the first rib 2513 is coincident with or tends to coincide with the central axis of the second rib 2514, defining a plane, which may be a plane passing through the central axis of the connector 251, which may be a cross-section as shown in FIGS. 5 and 9, the projection of the cross-section of the first rib 2513 and the cross-section of the second rib 2514 onto the plane is generally triangular, the included angle α 1 between the first side and the second side of the projection of the cross-section of the first rib 2513 onto the plane is defined as α 1, the included angle α 1 may range from 45 ° ≦ α 1 ≦ 60 °, the axial height H1 of the projection of the cross-section of the first rib 2513 onto the plane is defined as H1, the axial height H1 may range from 0.15mm ≦ H1 ≦ 0.3mm, and likewise, the included angle α 2 between the first side and the second side of the projection of the cross-section of the second rib 2514 onto the plane is defined as, the included angle α 2 may be in a range of 45 ° or more and α 2 or more and 60 ° or less, and an axial height of a projection of the cross section of the second rib 2514 on the plane is defined as H2, and an axial height H2 may be in a range of 0.15mm or more and H2 or more and 0.3mm or less, and in addition, in order to ensure that the upper end surface of the valve core seat 252 abuts against the first step portion 2511, an axial height H1 of a projection of the cross section of the first rib 2513 on the plane may be equal to or approximately equal to an axial height H2 of a projection of the cross section of the second rib 2514 on the plane. An axial height defined between a projection of an upper end surface of the section of the valve core seat 252 on the plane and a projection of a section of the third stepped portion 2524 on the plane is h1, an axial height defined between a projection of a section of the first stepped portion 2511 on the plane and a projection of a lower end surface of the section of the connecting member 251 on the plane is h2, and the following relations are satisfied: h1 is more than or equal to H2+ H1. A radial width L1 of a projection of an upper end surface of the cross section of the valve port 253 on the plane, a radial width L2 of a top angle of a projection of a cross section of the first rib 2513 on the plane and a top angle of a projection of a cross section of the second rib 2514 on the plane, and a radial width L3 of a top angle of a projection of a cross section of the first rib 2513 on the plane and an outer end point of a projection of an upper end surface of the cross section of the valve port 253 on the plane are defined, which satisfy the following relations: 0.4L1 is less than or equal to L2 is less than or equal to 0.6L1, and L3 is 1/2 x (L1-L2). The first rib 2513 and the second rib 2514 are provided in this way, when the ribs are press-fitted into the valve port 253, the valve port 253 is less likely to tilt due to pressure concentration, and the valve port 253 is likely to be kept balanced and stable.

Referring to fig. 5 to 9, in the present embodiment, the valve port 253 includes a first ring portion 2532 and a second ring portion 2533, the valve port 253 is integrally injection-molded, and a portion of the first ring portion 2532 protrudes from the second ring portion 2533 along a radial direction of the valve port 253, the first ring portion 2532 forms an upper end surface of the valve port 253, and the second ring portion 2533 forms a lower end surface of the valve port 253. Of course, as other embodiments, the valve port 253 may have other shapes. The cartridge seat assembly 25 further includes a seal 255, the seal 255 being disposed in the receiving cavity 254, the seal 255 being disposed about the outer periphery of the second ring portion 2533, the seal 255 being compressed radially of the valve port 253 between a side wall surface of the second ring portion 2533 and a side wall surface of the cartridge seat 252, the seal 255 being in a radially sealed compressed state. The provision of the seal 255 facilitates improving the sealing performance of the valve cartridge assembly 25 and reducing the risk of internal leakage. It should be noted that, because the rib is press-fitted into the valve port 253, a knife-edge seal can be formed between the rib and the valve port 253, which is beneficial to further improving the sealing performance of the valve plug seat assembly 25 and reducing the risk of internal leakage. As other embodiments, the valve cartridge assembly 25 may also not include the seal 255 where the sealing performance of the valve cartridge assembly 25 can be satisfied by a knife-edge seal.

Referring to fig. 1, the valve body member 3 includes a main valve body 31, a first connection pipe 32 and a second connection pipe 33, the main valve body 31 is fixedly connected to or integrally formed with the first connection pipe 32, the main valve body 31 is fixedly connected to or integrally formed with the second connection pipe 33, the main valve body 31 forms a valve body cavity 30, a part of the valve member 2 is located in the valve body cavity 30, the valve member 2 is fixed to the main valve body 3 by interference fit, insertion, welding, bonding, or screwing, and the like, in this embodiment, the valve member 2 is fixedly welded to the main valve body 31 through the connection seat 26, and further, a sealing arrangement is further performed between the valve member 2 and the main valve body 31. The first connecting pipe 32 is provided with a first channel 34, the second connecting pipe 33 is provided with a second channel 35, and the first channel 34 and the second channel 35 can realize communication through the matching of the valve port 2531 and the valve core assembly 24.

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 will understand that modifications and equivalents may be made thereto, and all technical solutions and modifications that do not depart from the spirit and scope of the present application are intended to be covered by the claims of the present application.

Claims (9)

1. An electrically operated valve comprising a connector, a valve cartridge and a valve port member, the connector and the valve cartridge being assembled to form a receiving cavity, part of the valve port member being located in the receiving cavity, characterized in that: the connecting piece includes first step portion and bellying, follows the connecting piece is radial, the bellying certainly the inside wall of connecting piece is inside protruding to form, the bellying includes the bead, follows the axial of connecting piece, the bead certainly the lower extreme face downward bulge of bellying forms, at least part the bead is embedded in the valve mouth piece, the up end of valve core seat with first step portion butt.

2. Electrically operated valve according to claim 1, characterized in that: the valve core seat comprises a second step part and a third step part, the valve core seat is provided with an installation cavity, the second step part is far away from an opening of the installation cavity than the third step part along the axial direction of the valve core seat, part of the connecting piece is positioned in the installation cavity, the convex edge is embedded into the valve opening piece from the upper end surface of the valve opening piece, the lower end surface of the valve opening piece is abutted against the second step part, and a gap is reserved between the lower end surface of the connecting piece and the third step part or the lower end surface of the connecting piece is contacted with the third step part.

3. Electrically operated valve according to claim 2, characterized in that: the convex ribs comprise a first convex rib and a second convex rib, the central axis of the first convex rib is coincided with or tends to be coincided with the central axis of the second convex rib, a plane is defined, the plane is a plane passing through the central axis of the connecting piece, and the projection of the cross section of the first convex rib and the cross section of the second convex rib on the plane is triangular.

4. An electrically operated valve according to claim 3, characterised in that: an included angle between a first side and a second side of the projection of the cross section of the first rib on the plane is defined as alpha 1, and an included angle between a first side and a second side of the projection of the cross section of the second rib on the plane is defined as alpha 2, and the two satisfy the following relations: alpha 1 is more than or equal to 45 degrees and less than or equal to 60 degrees, and alpha 2 is more than or equal to 45 degrees and less than or equal to 60 degrees;

an axial height of a projection of a cross section of the first rib on the plane is defined as H1, an axial height of a projection of a cross section of the second rib on the plane is defined as H2, and the following relations are satisfied: h1 is more than or equal to 0.15mm and less than or equal to 0.3mm, and H2 is more than or equal to 0.15mm and less than or equal to 0.3 mm.

5. Electrically operated valve according to claim 4, characterized in that: an axial height H1 projected on the plane by the section of the first rib is equal to or tends to be equal to an axial height H2 projected on the plane by the section of the second rib, an axial height H1 between a projection of an upper end face of the section of the valve core seat on the plane and a projection of the section of the third stepped part on the plane is defined, and an axial height H2 between a projection of the section of the first stepped part on the plane and a projection of a lower end face of the section of the connector on the plane are defined, and the axial heights H1 and H2 satisfy the following relations: h1 is more than or equal to H2+ H1.

6. Electrically operated valve according to claim 5, characterized in that: a radial width of a projection of an upper end surface of the cross section of the valve port member on the plane is defined as L1, a radial width of an included angle of a projection of a cross section of the first rib on the plane and an included angle of a projection of a cross section of the second rib on the plane is defined as L2, and a radial width of an included angle of a projection of a cross section of the first rib on the plane and an outer end point of a projection of an upper end surface of the cross section of the valve port member on the plane is defined as L3, which satisfy the following relations: 0.4L1 is less than or equal to L2 is less than or equal to 0.6L1, and L3 is 1/2 x (L1-L2).

7. Electrically operated valve according to any of claims 3-6, characterized in that: the valve port component comprises a first ring portion and a second ring portion, the valve port component is formed by plastic materials in an integral injection molding mode, the convex portion of the first ring portion protrudes out of the second ring portion in the radial direction of the valve port component, the first ring portion forms the upper end face of the valve port component, the second ring portion forms the lower end face of the valve port component, at least part of the convex edge is embedded into the first ring portion from the upper end face of the first ring portion, and the lower end face of the second ring portion is abutted to the second step portion.

8. Electrically operated valve according to claim 7, characterized in that: the electric valve further comprises a sealing piece, the sealing piece is located in the containing cavity and located on the periphery of the second ring portion, the sealing piece is compressed between the side wall surface of the second ring portion and the side wall surface of the valve core seat along the radial direction of the valve port piece, and the sealing piece is in a sealing and compressing state.

9. Electrically operated valve according to claim 8, characterized in that: the valve port component is provided with a valve port, the electric valve further comprises a valve core assembly, the electric valve is provided with a first channel and a second channel, the valve core assembly can be close to or far away from the valve port to adjust the opening degree of the valve port, and the first channel and the second channel can be matched and communicated through the valve port and the valve core assembly.

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