CN115076434A

CN115076434A - Electrically operated valve and method of assembling the same

Info

Publication number: CN115076434A
Application number: CN202110259967.1A
Authority: CN
Inventors: 不公告发明人
Original assignee: Zhejiang Sanhua Automotive Components Co Ltd
Current assignee: Zhejiang Sanhua Automotive Components Co Ltd
Priority date: 2021-03-10
Filing date: 2021-03-10
Publication date: 2022-09-20

Abstract

An electric valve and an assembling method thereof, the electric valve comprises a rotor assembly, a valve core assembly, a valve port part, a stop seat and a stop ring, the rotor assembly can drive the valve core assembly to abut against the valve port part, the stop ring is positioned at the periphery of the stop seat, the rotor assembly can drive the stop ring to move relative to the stop seat, the stop ring can abut against the stop seat, and the assembly method ensures that when the stop ring moves to abut against the stop seat, the valve core assembly abuts against the valve port part to ensure the sealing performance of the electric valve, can convert the locking of case subassembly and valve port portion butt to rotor subassembly into the locking of retaining ring and stop seat butt to rotor subassembly like this, be favorable to avoiding or slowing down the problem of case subassembly and valve port portion because of the excessive butt of rotor subassembly drive, be favorable to avoiding or slowing down the deformation and the wearing and tearing that cause the valve port portion, and then be favorable to improving the wear resistance of motorised valve.

Description

Electrically operated valve and method of assembling the same

Technical Field

The present application relates to an electric valve and an assembly method comprising the electric valve.

Background

In an air conditioning system or a thermal management system, an electric valve is usually adopted as a throttling element, the electric valve comprises a rotor component, a valve core and a valve port part, when the electric valve is closed or initialized to zero, the valve closing operation is usually performed by the rotor assembly driving the valve core to abut against the valve port, and the inventor knows that in order to ensure that the valve core can abut against the valve port, the angle that the rotor assembly rotates is usually set to be slightly larger than the angle that the rotor assembly rotates when the valve core moves to abut against the valve port, therefore, after the valve core is abutted to the valve port part, the rotor assembly may continue to rotate for a certain angle, which easily causes excessive abutment of the valve core and the valve port part, and the rotor assembly is stopped by excessive abutment of the valve core and the valve port part for a long time and frequently, which may cause deformation and abrasion of the valve port part, especially when the valve port part is made of plastic material, thereby affecting the durability of the electric valve.

Disclosure of Invention

The application aims to provide an electric valve and an assembling method thereof, which are beneficial to improving the durability of the electric valve.

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

an electric valve comprises a rotor assembly, a screw rod, a valve core assembly and a valve opening part, wherein the rotor assembly is fixedly connected with one end of the screw rod, the other end of the screw rod is in threaded connection with the valve core assembly, the rotor assembly drives the valve core assembly to move close to or far away from the valve opening part through the screw rod, the electric valve further comprises a stopping assembly, the stopping assembly comprises a stopping seat, a stopping ring and a guide rod, the stopping seat is positioned on the periphery of part of the screw rod and fixedly arranged, the stopping ring is positioned on the periphery of part of the stopping seat, the guide rod is fixedly connected with the rotor assembly or the guide rod and the screw rod, the rotor assembly drives the stopping ring to move relative to the stopping seat through the abutting of the guide rod and the stopping ring, and the stopping ring can abut against the stopping seat, when the stop ring is abutted against the stop seat, the valve core assembly is abutted against the valve port part.

An assembly method of an electric valve, the electric valve comprising a rotor assembly, a screw rod, a stop assembly, a valve core assembly and a valve core seat assembly, the stop assembly comprising a stop seat, a guide rod and a stop ring, the valve core seat assembly comprising a valve port portion, the assembly method comprising the steps of:

completing the assembly of the screw rod, the valve core assembly and the valve core seat assembly;

the screw rod is rotated manually or through a tool, so that the valve core assembly moves to be abutted against the valve port;

the stop ring is sleeved on the periphery of the guide part of the stop seat, and is rotated manually or through a tool, so that the stop ring moves to be abutted against the stop seat;

and mounting the rotor assembly and the guide rod, fixing the rotor assembly and the screw rod, fixing the guide rod and the rotor assembly or fixing the guide rod and the screw rod, and abutting the guide rod and the stop ring.

The application provides an electric valve and an assembly method thereof, the electric valve comprises a rotor component, a valve core component, a valve port part, a stop seat and a stop ring, the rotor component can drive the valve core component to be abutted against the valve port part, the stop ring is positioned at the periphery of the stop seat, the rotor component can drive the stop ring to move relative to the stop seat, the stop ring can be abutted against the stop seat, and the assembly method ensures that when the stop ring moves to abut against the stop seat, the valve core assembly abuts against the valve port part to ensure the sealing performance of the electric valve, can convert the locking of case subassembly and valve port portion butt to rotor subassembly into the locking of retaining ring and stop seat butt to rotor subassembly like this, be favorable to avoiding or slowing down the problem of case subassembly and valve port portion because of the excessive butt of rotor subassembly drive, be favorable to avoiding or slowing down the deformation and the wearing and tearing that cause the valve port portion, and then be favorable to improving the wear resistance of motorised valve.

Drawings

Figure 1 is a schematic cross-sectional view of an example of a first embodiment of an electrically operated valve;

FIG. 2 is a schematic cross-sectional view of the valve member of FIG. 1;

FIG. 3 is a schematic perspective view of the stop block and web of FIG. 1;

FIG. 4 is a cross-sectional view of the connector holder of FIG. 1;

FIG. 5 is a perspective view of the connecting socket of FIG. 1;

FIG. 6 is a perspective view of the valve spool assembly of FIG. 1;

FIG. 7 is a schematic cross-sectional view of the valve spool assembly of FIG. 6;

FIG. 8 is a cross-sectional structural view of the cartridge seat assembly of FIG. 1;

figure 9 is another schematic cross-sectional view of the electrically operated valve of figure 1;

FIG. 10 is a perspective view of the stop ring of FIG. 9;

figure 11 is a cross-sectional view of an example of a second embodiment of an electrically operated valve;

FIG. 12 is a perspective view of the stop block and web of FIG. 11;

FIG. 13 is a perspective view of the stop ring of FIG. 11;

figure 14 is a cross-sectional view of an example of a third embodiment of an electrically operated valve;

fig. 15 is a perspective view of the stop block and adapter sleeve of fig. 14.

Detailed Description

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

referring to fig. 1, 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 to the valve body member 3, the driving member 1 is located at an outer periphery of another part of the valve member 2, the driving member 1 is connected to the valve member 2, and the electric valve 100 is electrically and/or signal-connected to 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 connector 13, the stator assembly 12 includes a coil winding 121, the connector 13 includes a first pin 131, in this embodiment, the outer casing 11 and the connector 13 are integrally injection molded, specifically, the coil winding 121 and the first pin 131 are injection inserts, the outer casing 11 and the connector 13 are integrally injection molded, one end of the first pin 131 is electrically connected to the coil winding 121, and the other end of the first pin 131 is located in a socket cavity formed by the connector 13 and is used for being electrically connected to the outside.

Referring to fig. 2, the valve component 2 includes a rotor assembly 21, a connecting seat 22, a screw 23, a valve core assembly 24, a valve core seat assembly 25, and a sleeve 26, the rotor assembly 21 is fixedly connected to one end of the screw 23, the other end of the screw 23 is threadedly connected to the valve core assembly 24, the connecting seat 22 is located at the peripheries of a part of the screw 23 and a part of the valve core assembly 24, the valve core seat assembly 25 is located at the periphery of another part of the valve core assembly 24, the connecting seat 22 is fixedly connected to the valve core seat assembly 25, the sleeve 26 is located at the periphery of the rotor assembly 21, and the sleeve 26 is fixedly connected to the connecting seat 22, in this embodiment, the sleeve 26 is fixedly connected to the connecting seat 22 by welding.

Referring to fig. 2, the rotor assembly 21 includes a magnetic rotor 211 and a connecting member 212, the magnetic rotor 212 is connected and fixed with the connecting member 212, and the connecting member 212 is further connected and fixed with one end of the lead screw 23, specifically, in this embodiment, the connecting member 212 is used as an injection insert to form the magnetic rotor 211 by injection molding, the magnetic rotor 211 is fixed with the connecting member 212 by injection molding, the connecting member 212 includes a cylindrical portion 2121, the connecting member 212 is located on the periphery of one end of the lead screw 23 through the cylindrical portion 2121, and the cylindrical portion 2121 is connected and fixed with the lead screw 23, specifically, the connecting member 212 and one end of the lead screw 23 can be fixed by welding, bonding, interference fit, or the like.

Referring to fig. 2 to 4, the valve member 2 further includes a stop assembly 27, the stop assembly 27 includes a stop seat 271 and a connecting plate 272, the stop seat 271 may be made of a plastic material, and the connecting plate 272 is connected and fixed with the stop seat 271. The stopping seat 271 is positioned at the periphery of part of the screw rod 23, the stopping seat 271 is in clearance fit with the screw rod 23, the stopping seat 271 is fixed with the connecting seat 22 through the connecting plate 272, in the present embodiment, the connecting plate 272 and the connecting seat 22 are riveted, specifically, the connecting seat 22 includes a first mounting portion 221, the first mounting portion 221 forms a first mounting cavity 222, the first mounting portion 221 includes a first step portion 2211 and a riveting portion 2212, the first step portion 2211 is disposed near the riveting portion 2212, the connecting plate 272 and a part of the stopping seat 271 are located in the first mounting cavity 222, one end surface of the connecting plate 272 abuts against the first step portion 2211, the riveting portion 2212 is bent and pressed against the other end surface (not shown) of the connecting plate 272, so that the connecting plate 272 is pressed between the riveting portion 2212 and the first step portion 2211, thereby realizing the riveted fixing of the connecting plate 272 and the connecting seat 22, of course, as another embodiment, the connection plate 272 and the connection seat 22 may also be fixed by welding, or by adhesion, or by interference fit. It should be noted that, the arrangement of the stopping seat 271 and the screw rod 23 in clearance fit is beneficial to reduce the swing amplitude of the screw rod 23 when rotating along with the circumferential direction of the rotor assembly 21, that is, the stopping seat 271 plays a certain guiding role on the screw rod 23, and on the other hand, reduces the friction between the screw rod 23 and the stopping seat 271 when rotating.

Referring to fig. 2 and 4, the valve component 2 further includes a bearing 28 and a collar 29, the first mounting portion 221 further includes a second step portion 2213, the second step portion 2213 is disposed farther from the riveting portion 2212 than the first step portion 2211, the bearing 28 is disposed on the outer periphery of a portion of the lead screw 23, the bearing 28 is disposed in the first mounting cavity 222, along the axial direction of the valve component 2, the bearing 28 is disposed between the stop seat 271 and the second step portion 2213, one end surface of the bearing 28 abuts against the second step portion 2213, the other end surface of the bearing 28 may abut against or leave a gap with the end surface of the stop seat 271, the bearing 28 is fixedly connected with the first mounting portion 221, specifically, the outer peripheral wall of the bearing 28 and the side wall of the first mounting portion 221 may be fixed by interference fit, welding, bonding, or the like, and in this embodiment, the outer peripheral wall of the bearing 28 and the side wall of the first mounting portion 221 are fixed by interference fit. The collar 29 is located at a portion of the outer periphery of the screw 23, and in this embodiment, at least a portion of the collar 29 is located in the open cavity formed by the stop seat 271, which facilitates reducing the axial height of the valve member 2. The collar 29 is fixedly connected with the screw rod 23, and specifically, the collar 29 and the screw rod 23 may be fixed by interference fit, welding, bonding, or the like. The screw 23 includes a flange portion 231, the flange portion 231 protrudes outward in the radial direction of the screw 23, the bearing 27 is also located between the flange portion 231 and the collar 29 in the axial direction of the valve member 2, and the screw 23 is axially restrained by the flange portion 231 abutting against the bearing 28 or the collar 29 abutting against the bearing 28.

Referring to fig. 2, 4 to 7, the valve core assembly 24 includes a valve core 241 and a nut 242, the nut 242 may be made of a plastic material, the valve core 241 and the nut 242 are connected and fixed, in this embodiment, the valve core 241 is used as an injection insert, the nut 242 is formed by injection molding, and the nut 242 and the valve core 241 are fixed by injection molding, but as another embodiment, the valve core 241 and the nut 242 may also be fixed by interference fit, bonding, riveting, or the like. The nut member 242 has a threaded hole 2421, the threaded hole 2421 is disposed through the nut member 242, an internal threaded section is disposed on a side wall at least partially forming the threaded hole 2421, correspondingly, an external threaded section is disposed on one end of the screw rod 23 in threaded connection with the valve core assembly 24, one end of the screw rod 23 provided with the external threaded section extends into the threaded hole and is in threaded connection with the nut member 242, thereby achieving threaded connection of the screw rod 23 and the valve core assembly 24, and the nut member 242 is disposed to be a plastic material, which is beneficial to reducing thread wear when the screw rod 23 is in threaded engagement with the nut member 242. The nut 242 further includes a limiting portion 2422, the limiting portion 2422 protrudes from an outer side wall of the valve core 241 along a radial direction of the valve core 241, and the limiting portion 2422 is a non-rotating body. The first mounting portion 221 further includes a matching portion 2214, the limiting portion 2422 is located in the first mounting cavity 222, the limiting portion 2422 is in limiting matching with the matching portion 2214, the circumferential rotation of the nut 242 is limited, and further the circumferential rotation of the valve element assembly 24 is limited, the limiting matching structures of the limiting portion 2422 and the matching portion 2214 can be in various forms, in this embodiment, the limiting portion 2422 includes a limiting portion side surface 2423, correspondingly, the matching portion 2214 includes a matching portion side surface 2215, when the limiting portion 242 is located in the first mounting cavity 222, the limiting portion side surface 2423 is attached to the matching portion side surface 2215, and the circumferential rotation of the valve element assembly 24 is limited. It should be noted that, in order to enable the valve core assembly 24 to perform linear reciprocating motion along the axial direction of the valve member 2, the axial height H of the matching portion 2214 needs to be larger than the axial height H of the limiting portion 2422, and specifically, the proportional relationship between the axial height H of the matching portion 2214 and the axial height H of the limiting portion 2422 can be designed and determined according to the specific motion stroke of the valve core assembly 24, for example, H is greater than or equal to 3H and less than or equal to 5H.

Referring to fig. 2, 4 and 8, the valve core seat assembly 25 includes a valve core seat 251 and a fixing seat 252, the valve core seat 251 may be made of a plastic material, specifically, may be made of a Polyetheretherketone (PEEK) material, and the valve core seat 251 and the fixing seat 252 are connected and fixed, in this embodiment, the fixing seat 252 is an injection molding insert, the valve core seat 251 is formed by injection molding, and the valve core seat 251 and the fixing seat 252 are fixed by injection molding, but as another embodiment, the fixing seat 252 and the valve core seat 251 may also be fixed by bonding or interference fit. The valve core seat assembly 25 is fixed to the connecting seat 22 through the fixing seat 252, specifically, the fixing seat 252 includes a connecting portion 2521 and a third step portion 2522, the third step portion 2522 is disposed closer to the valve core seat 251 than the connecting portion 2521 along an axial direction of the valve core seat assembly 25, accordingly, the connecting seat 22 includes a second mounting portion 223, the second mounting portion 223 forms a second mounting cavity 224, for a single component of the connecting seat 22, the second mounting cavity 224 is communicated with the first mounting cavity 222, the connecting portion 2521 is located in the second mounting cavity 224, the third step portion 2522 abuts against a lower end surface of the connecting seat 22, the end surface of the connecting seat 22, which is far away from the rotor assembly 21, is a lower end surface, the connecting portion 2521 is fixed to the second mounting portion 223, specifically, the connecting seat 22 and the fixing seat 252 may be fixed in a welding manner, an adhesion manner, an interference fit manner, or the like, so as to realize the connecting seat 22 and the connecting seat assembly 25. The valve core seat 251 comprises a valve port portion 253, the valve port portion 253 forms a valve port, and when the valve core assembly 24 performs linear reciprocating motion along the axial direction of the valve member 2, the valve core assembly 24 can approach or move away from the valve port to adjust the opening degree of the valve port, so that throttling or on-off is formed at the valve port. It should be noted that: the valve core seat 251 is made of PEEK material, so that when the electric valve 100 is closed, a better abutting seal is formed between the valve core assembly 24 and the valve core seat 251, which is beneficial to improving inner leakage.

Referring to fig. 2 and 4, the valve member 2 further includes a sealing assembly 20, the sealing assembly 20 includes a sealing ring 201 and a sealing member 202, the sealing ring 201 and the sealing member 202 may be respectively formed by injection molding of a plastic material, the sealing ring 201 is located at an outer periphery of the valve core assembly 24, and may be located at an outer periphery of the valve core 241, an inner peripheral wall of the sealing ring 201 is in interference fit with an outer peripheral wall of the valve core 241, such that the inner peripheral wall of the sealing ring 201 is in tight contact with the outer peripheral wall of the valve core 241, the sealing ring 201 is located in the second mounting cavity 224, the sealing ring 201 includes a groove portion, the groove portion is formed by inward recessing from the outer peripheral wall of the sealing ring 201 along a radial direction of the sealing ring 201, the sealing member 202 is located in the second mounting cavity 224, a portion of the sealing member 202 is located in a groove cavity formed by the groove portion, the sealing member 202 is compressed between the groove portion and a side wall of the second mounting portion 223 along the radial direction of the valve member 2, and the sealing member 202 is in a sealing compression state, the seal assembly 20 is used to seal the cartridge assembly 24. The second mounting portion 223 includes the fourth step portion 2231, along the axial of the valve member 2, the seal assembly 20 is located between the end surfaces of the fourth step portion 2231 and the fixing seat 252, the fourth step portion 2231 is farther away from the valve core seat 251 than the end surface of the fixing seat 252, the seal assembly 20 is axially limited by the end surfaces of the fourth step portion 2231 and the fixing seat 252, the seal assembly 20 is prevented from moving axially along with the valve core assembly 24, and the sealing performance of the seal assembly 29 is improved.

Referring to fig. 1 and 2, the electric valve 100 works according to the following principle: after the driving part 1 is powered on, the driving part 1 generates an excitation magnetic field through the stator assembly 12, the rotor assembly 21 performs circumferential rotation under the magnetic field excitation of the stator assembly 12, the rotor assembly 21 is fixedly connected with one end of the screw rod 23, the other end of the screw rod 23 is in threaded connection with the valve core assembly 24, so that the rotor assembly 21 can drive the screw rod 23 to perform circumferential rotation together, the circumferential-rotation screw rod 23 is in threaded fit with the valve core assembly 24, the screw rod 23 is axially limited through the bearing 28, and under the condition that the valve core assembly 24 is circumferentially limited through the connecting seat 22, the valve core assembly 24 can perform linear reciprocating motion along the axial direction of the valve part 2 under the action of threads, so that the valve core assembly can be close to or far away from a valve port, and throttling and on-off are formed at the valve port.

Referring to fig. 1 and 2, when the electric valve 100 is closed or when the electric valve 100 is started for initial zeroing (running to the closed position), to ensure that the valve core assembly 24 can abut against the valve port 253, the electric valve 100 will often set the angle through which the rotor assembly 21 rotates slightly larger than the angle through which the rotor assembly 21 rotates when the valve core assembly 24 is moved into abutment against the valve port 253, that is, the rotor assembly 21 may continue to rotate through a certain angle after the valve core assembly 24 abuts the valve port 253, this easily causes excessive contact between the valve element assembly 24 and the valve port 253, and the rotor assembly 21 is stopped by excessive contact between the valve element assembly 24 and the valve port 253 for a long period of time and frequently, which may cause deformation and wear of the valve port 253, particularly when the valve port portion 253 is made of a plastic material, as in the present embodiment, the valve port portion 253 is made of a PEEK material, thereby affecting the durability of the electric valve 100.

In order to eliminate or reduce the deformation and wear of the valve port 253, referring to fig. 3, 9 and 10, the stopping assembly 27 further includes a guiding rod 273 and a stopping ring 274, the guiding rod 273 is fixedly connected to the rotor assembly 21, in this embodiment, the guiding rod 273 is fixedly connected to the connecting part 212 of the rotor assembly, specifically, the guiding rod 273 includes a rod portion 2731 and a fixing portion 2732, the rod portion 2731 and the fixing portion 2732 are substantially vertically disposed, the guiding rod 273 is fixedly connected to the connecting part 212 through the fixing portion 2732, specifically, the fixing portion 2732 and the connecting part 212 may be fixed by welding, bonding, interference fit, or the like, and of course, as other embodiments, the guiding rod 273 may also be fixedly connected to the screw 23 through the fixing portion 2732. The stop ring 274 may be made of a plastic material, the stop ring 274 may be formed by integral injection molding, the stop ring 274 is located at an outer periphery of a portion of the stop seat 271, and the stop ring 274 is threadedly coupled with the stop seat 271, specifically, the stop ring 274 includes an inner peripheral sidewall 2741, at least a portion of the inner peripheral sidewall 2741 is provided with an inner threaded section, and the inner peripheral sidewall 2741 forms a through hole 2742, and accordingly, referring to fig. 3, the stop seat 271 includes a guide portion 2711, at least a portion of the outer peripheral sidewall 2711 is provided with an outer threaded section, the stop ring 274 is sleeved at an outer periphery of the portion of the guide portion 2711 through the through hole 2742, and the inner peripheral sidewall 2741 of the stop ring 274 is threadedly coupled with the guide portion 2711 of the stop seat 271. In this embodiment, the stop ring 274 further includes a first concave portion 2743, the first concave portion 2743 is formed by being recessed inward from an outer peripheral sidewall of the stop ring 274 in a radial direction of the stop ring 274, a portion of the rod portion 2731 is located in a first cavity formed by the first concave portion 2743, and the rod portion 2731 is in clearance fit with the first concave portion 2743, so as to facilitate assembling of the rod portion 2731 and the first concave portion 2743, but as another embodiment, the rod portion 2731 and the first concave portion 2743 may also be fixed by welding, bonding, interference fit, or the like. The stopping ring 274 further includes a first protrusion 2744, the first protrusion 2744 protrudes from an end surface of the stopping ring 274 along an axial direction of the stopping ring 274, the stopping seat 271 further includes a second protrusion 2712 (see fig. 3), the second protrusion 2712 protrudes from a step surface of the stopping seat 271 along the axial direction of the stopping seat 271, the second protrusion 2712 is further connected to a peripheral side wall of the guiding portion 2711, the first protrusion 2744 is capable of abutting against the second protrusion 2712 to stop an angle of rotation of the rotor assembly 21, specifically, the rotor assembly 21 is capable of driving the lead screw 23 to rotate circumferentially together, the guiding rod 273, which is connected and fixed to the lead screw 21 or the lead screw 23, follows the rotor assembly 21 to rotate circumferentially, the guiding rod 273 has a rod portion 2731 abutting against a side wall of the rod portion 2743 during rotation, and the stopping ring 274 is located at a portion of an outer periphery of the guiding portion 2711 and is in threaded connection with the guiding portion 2711, such that under pushing of the 2731, the stop ring 274 can perform linear reciprocating motion along the axial direction of the guide portion 2711 under the action of the screw threads while rotating along with the guide rod 273 in the circumferential direction, and during the motion of the stop ring 274, the first protrusion 2744 of the stop ring 274 can abut against the second protrusion 2712 of the stop seat, so as to stop the rotating angle of the rotor assembly 21, and at this time, the valve core assembly 24 and the valve port 253 are just in an abutting sealing state, namely a closed valve position, so that the abutment of the valve core assembly 24 and the valve port 253 against the rotor assembly 21 can be converted into the abutment of the first protrusion 2744 and the second protrusion 2712 against the rotor assembly 21, during the closing or initialization of the electric valve 100, the deformation and the abrasion of the valve port 253 caused by the excessive abutment of the valve core assembly 24 and the valve port 253 can be eliminated or alleviated, and the durability of the electric valve 100 can be improved. It should be noted that the stop ring 274 can be abutted against the stem 2731 in various ways, for example, as another embodiment, the stop ring 274 can be further provided with a projection extending outward in the radial direction thereof, and the stem 2731 can be abutted against the projection to abut the stop ring 274 against the stem 2731.

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 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 fixedly connected with the main valve body 31, specifically, the valve member 2 and the main valve body 31 can be fixed by interference fit, or insertion, or welding, or bonding, or screwing, etc., in this embodiment, the valve member 2 is fixedly welded with the main valve body 31 by the connection seat 22, and further, a sealing arrangement is further performed between the valve member 2 and the main valve body 31. The first connecting pipe 32 and the main valve body 31 can be fixed by welding, bonding, inserting, interference fit, threaded connection and the like, the first connecting pipe 32 and the main valve body 31 can be arranged in a sealing manner, and the first connecting pipe 32 forms a first flow passage 34; the second connecting pipe 33 and the main valve body 31 may be fixed by welding, bonding, inserting, interference fitting, or screwing, and the like, the second connecting pipe 33 and the main valve body 31 may be provided with a seal, the second connecting pipe 33 forms a second flow passage 35, and the first flow passage 34 and the second flow passage 35 may be opened, closed, and throttled through a valve port, and as another embodiment, the first connecting pipe 32 and/or the second connecting pipe 34 may be integrally formed with the main valve body 31.

Referring to fig. 1, 2 and 6, the nut member 242 further has at least one hole 2424, the number of the holes 2424 is at least one, the hole 2424 is disposed through the nut member 242 along the axial direction of the nut member 242, the hole 2424 is not directly communicated with the threaded hole 2421, the hole 2424 is communicated with the first mounting cavity 222 and the second flow channel 35, so that when the high-pressure working fluid flows in from the second flow channel 35, part of the high-pressure fluid can enter the first mounting cavity 222 through the hole 2424, is located on the back pressure side of the valve core seat 24, and the high-pressure fluid located in the first mounting cavity 222 is sealed by the sealing assembly 20, so as to avoid mixing of the high-pressure fluid and the low-pressure working fluid throttled and depressurized by the valve port, ensure the pressure of the high-pressure working fluid located in the first mounting cavity 222, the valve core assembly 24 is subjected to two pressures in opposite directions applied by the high-pressure working fluid along the axial direction of the valve core assembly 24, which is beneficial to balance or tend to the forces on the valve core assembly 24, the operation stability of the valve core assembly 24 is facilitated.

Referring to fig. 11 to 13, a second embodiment of the electric valve is shown, which differs from the first embodiment in that: in the second embodiment, the spiral guide 2712 ' is provided on the outer peripheral side wall of the guide portion 2711 ' of at least a part of the stopper holder 271 ', the spiral guide 2712 ' is formed by recessing the outer peripheral side wall of the guide portion 2711 ' inward in the radial direction of the guide portion 2711 ', and the spiral guide 2712 ' is spirally provided. The stopper ring 274 'includes a spiral body portion 2741', a first protruding portion 2742 'and a second protruding portion 2743', the first protruding portion 2742 'and the second protruding portion 2743' are respectively formed to protrude outward from both ends of the spiral body portion 2741 'in a radial direction of the spiral body portion 2741', the stopper ring 274 'is located at an outer periphery of the partial guide portion 2711', the partial spiral body portion 2741 'is located in a guide cavity formed by the spiral guide rail 2712', the spiral guide rail 2712 'supports the spiral body portion 2741', and the spiral body portion 2741 'can slide along the spiral guide rail 2712'. The stopper seat 271 ' includes a protrusion 2713 ', the protrusion 2713 ' protrudes from the step surface of the stopper seat 271 ' in the axial direction of the stopper seat 271 ', the protrusion 2713 ' includes a first side surface 2714 ', and the first side surface 2714 ' may be further connected to the lower end of the spiral guide 2712 ', defining that the end of the spiral guide 2712 ' adjacent to the connecting seat 22 is the lower end in the axial direction of the stopper seat 271 '. In the second embodiment, the rod portion 2731 of the guide rod abuts against the first protruding portion 2742 'of the stop ring, and the second protruding portion 2743' of the stop ring abuts against the protrusion portion 2713 ', so as to stop the rotating angle of the rotor assembly 21, specifically, the rotor assembly 21 drives the screw rod 23 to rotate circumferentially together, the guide rod 273, which is fixedly connected to the rotor assembly 21 or the screw rod 23, rotates circumferentially along with the rotor assembly 21, the rod portion 2731 of the guide rod 273 abuts against the first protruding portion 2742' during the rotation, so that under the pushing of the rod portion 2731, the spiral body portion 2741 'of the stop ring 274' can slide relative to the spiral guide rail 2712 ', when the stop ring 274' moves along the spiral guide rail 2712 'to the stroke end of the spiral guide rail 2712', the second protruding portion 2743 'of the stop ring abuts against the protrusion portion 2713', further, the second protruding portion 2743 'abuts against the first side surface 2714' of the protrusion portion, and the angle of the rotation of the valve assembly 21 is stopped, and at the same time, the valve core assembly 24 and the valve port 253 are just in an abutting sealing state (off-valve position), so that the stop of the abutment of the valve core assembly 24 and the valve port 253 on the rotor assembly 21 can be converted into the stop of the abutment of the rod portion 2731 and the first protruding portion 2742 ', the abutment of the second protruding portion 2743 ' and the protrusion portion 2713 ' on the rotor assembly 21, and in the process of closing or initializing the electric valve 100 ', the deformation and the abrasion of the valve port 253 caused by the excessive abutment of the valve core assembly 24 and the valve port 253 can be eliminated or reduced, and the durability of the electric valve 100 ' can be improved. The structure of other parts of the electric valve 100' is substantially the same as that of the first embodiment, and will not be described herein.

Referring to fig. 14 to 15, a third embodiment of the electric valve is shown, which differs from the first embodiment in that: in the third embodiment, the stop assembly 27 includes a stop seat 271 "and a connecting sleeve 272", the connecting sleeve 272 "is used as an injection molding insert, the stop seat 271" is formed by injection molding, the connecting sleeve 272 "is formed with a connecting cavity, the connecting sleeve 272" is located at a part of the periphery of the connecting seat 22 through the connecting cavity, or a part of the connecting seat 22 is located in the connecting cavity, the connecting sleeve 272 "is connected and fixed with the outer sidewall of the connecting seat 22, specifically, by welding, bonding, interference fit, or the like, in the present embodiment, the connecting sleeve 272" is fixed with the outer sidewall of the connecting seat 22 through welding, compared with the first embodiment, the connecting plate 272 is fixed with the connecting seat 22 through riveting, in the present embodiment, it is beneficial to protect the safety of the stop seat 271 ", because in the first embodiment, along the axial direction of the connecting plate 272, the riveting will apply a larger pressure to the connecting plate 272, the connecting plate 272 and the stopping seat 271 are fixed by injection molding, which may cause damage to the stopping seat 271, such as cracking, during riveting. The structure of other parts of the electric valve 100 "is substantially the same as that of the first embodiment, and will not be described herein.

Referring to fig. 1 to 15, in order to ensure that the valve core assembly 24 and the valve port 253 are just in an abutting sealing state, i.e. a closed valve position, when the stop assembly 27 stops the rotating angle of the rotor assembly 21, the assembling method of the electric valve is further explained, and the assembling method of the electric valve comprises the following steps:

the assembly completes the parts of the valve unit 2 other than the rotor assembly 21, the guide lever 273, the stop ring (274, 274',) and the sleeve 26;

the screw rod 23 is rotated manually or through a tool, so that the valve core assembly 24 moves to be tightly abutted against the valve port 253, namely, the valve is closed;

the stop ring (274, 274 ') is sleeved on the periphery of the guide part (2711, 2711 ') of the stop seat, and the stop ring (274, 274 ',) is rotated manually or through a tool to move the stop ring (274, 274 ',) to be abutted against the stop seat (271, 271 ');

mounting the rotor assembly 21 and the guide rod 273, fixing the rotor assembly 21 and the screw rod 23, fixing the guide rod 273 and the rotor assembly 21 or fixing the guide rod 273 and the screw rod 23, and abutting the guide rod 273 against the stop rings (274, 274'), so that the stop point of the positioning stop assembly 27 is positioned at the closed valve position of the valve core assembly 24 and the valve port 253;

the sleeve 26 is positioned at the periphery of the rotor assembly 21, and the sleeve 26 is fixedly connected with the connecting seat 22 to complete the assembly of the valve component 2;

part of the valve member 2 extends into the valve body cavity 30 of the valve body member 3, the valve member 2 is fixedly connected with the valve body member 3, the driving member 1 is sleeved on the periphery of the other part of the valve member 2, and the driving member 1 is fixedly connected with the valve member 2.

Wherein, stop ring (274, 274 ',) move to and stop seat (271, 271') butt, specifically include: in the first and third embodiments, the stopper ring 274 is rotated to screw-engage the stopper ring 274 with the guide portion 2711, and the first projection 2744 of the stopper ring abuts against the second projection 2712 of the stopper holder; in the second embodiment, the stop ring 274 ' is rotated so that the spiral body portion 2741 ' of the stop ring is slidably engaged with the spiral guide rail 2712 ' of the guide portion and the second protrusion 2473 ' of the stop ring abuts against the boss 2713 ' of the stop seat.

The guide rod 273 abuts against the stopper rings (274, 274'), and specifically includes: in the first and third embodiments, the rod portion 2731 of the partial guide rod is located in the first cavity formed by the first recess 2743 of the stopper ring, and the rod portion 2731 abuts against the side wall of the first recess 2743; in the second embodiment, the rod portion 2731 is brought into abutment with the first projection 2742 'of the stopper ring 274'.

It should be noted that: the above embodiments are only used for illustrating the present application and do not limit the technical solutions described in the present application, such as directional definitions of "front", "back", "left", "right", "up", "down", and the like. Although the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can make modifications and substitutions to 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

1. The utility model provides an electrically operated valve, includes rotor subassembly, lead screw, case subassembly and valve opening portion, the rotor subassembly with the one end of lead screw is connected fixedly, the other end of lead screw with case subassembly threaded connection, the rotor subassembly passes through the lead screw drive the case subassembly is close to or keeps away from the motion of valve opening portion, its characterized in that: the electric valve also comprises a stop assembly, the stop assembly comprises a stop seat, a stop ring and a guide rod, the stop seat is positioned on the periphery of part of the screw rod, the stop seat is fixedly arranged, the stop ring is positioned on the periphery of part of the stop seat, the guide rod is fixedly connected with the rotor assembly or the guide rod and the screw rod, the rotor assembly drives the stop ring to move relative to the stop seat through the abutting joint of the guide rod and the stop ring, the stop ring can abut against the stop seat, and when the stop ring abuts against the stop seat, the valve core assembly abuts against the valve port.

2. Electrically operated valve according to claim 1, characterized in that: the stop seat includes the guiding part, at least part be provided with the external screw thread section on the outer peripheral side wall of guiding part, the stop ring includes interior circumference lateral wall, at least part be provided with interior screw thread section on the interior circumference lateral wall, interior circumference lateral wall forms the through-hole, the stop ring passes through the through-hole is located the part the periphery of guiding part, the stop ring with guiding part threaded connection.

3. Electrically operated valve according to claim 2, characterized in that: the guide bar comprises a fixing part and a rod part, the fixing part is connected and fixed with the rotor assembly or the fixing part and the lead screw, the stop ring comprises a first concave part and a first convex part, the radial direction of the stop ring is followed, the first concave part is formed by inwards recessing the peripheral side wall of the stop ring, the axial direction of the stop ring is followed, the first convex part protrudes out of the end face of the stop ring, the stop seat comprises a second convex part, the axial direction of the thread seat is followed, the second convex part protrudes out of the step face of the stop seat, part of the rod part is located in a first cavity formed by the first concave part, the rod part can be abutted against the first concave part, and the first convex part can be abutted against the second convex part.

4. Electrically operated valve according to claim 1, characterized in that: the stop seat comprises a guide part, a spiral guide rail is arranged on at least part of the outer peripheral side wall of the guide part, the spiral guide rail is formed by inwards sinking from the outer peripheral side wall of the guide part along the radial direction of the guide part, the stop ring comprises a spiral body part, the stop ring is positioned on part of the outer periphery of the guide part through the spiral body part, part of the spiral body part is positioned in a guide rail cavity formed by the spiral guide rail, the spiral guide rail supports the spiral body part, and the spiral body part can slide relative to the spiral guide rail.

5. Electrically operated valve according to claim 4, characterized in that: the guide rod comprises a fixing part and a rod part, the fixing part is connected and fixed with the rotor assembly or the fixing part and the screw rod, the stop ring further comprises a first extending part and a second extending part, the first extending part extends outwards from one tail end of the spiral body part along the radial direction of the spiral body part, the second extending part extends outwards from the other tail end of the spiral body part, the stop seat comprises a protruding part, the protruding part protrudes out of the step surface of the stop seat along the axial direction of the stop seat, the rod part can be abutted to the first extending part, and the second extending part can be abutted to the protruding part.

6. Electrically operated valve according to any of claims 1-5, characterized in that: the locking subassembly still includes the connecting plate, the motorised valve still includes the connecting seat, the connecting seat includes first installation department, first installation department forms first installation cavity, first installation department includes first step portion, first step portion is close to the opening setting of first installation cavity, with the connecting plate is for the inserts of moulding plastics, the formation of moulding plastics the locking seat, the locking seat with lead screw clearance fit, connecting plate and part the locking seat is located first installation cavity, a terminal surface of connecting plate with first step portion butt, the connecting plate is connected fixedly with first installation department.

7. Electrically operated valve according to any of claims 1-5, characterized in that: the stop subassembly still includes the adapter sleeve, the motorised valve still includes the connecting seat, with the adapter sleeve is the inserts of moulding plastics, and the formation of moulding plastics the stop seat, the stop seat with lead screw clearance fit, the adapter sleeve has the connection chamber, and part the connecting seat is located the connection chamber, the adapter sleeve with the lateral wall of connecting seat is connected fixedly.

8. Electrically operated valve according to claim 6 or 7, characterized in that: the electric valve is provided with a first flow passage and a second flow passage, and further comprises a valve core seat assembly, wherein the valve core seat assembly comprises a valve core seat and a fixed seat, the fixed seat is an injection molding insert and is formed by injection molding, the fixed seat is fixedly connected with the connecting seat, the valve core seat comprises a valve port part, a valve port is formed on the valve port part, 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 flow passage and the second flow passage can be communicated through the valve port.

9. Electrically operated valve according to claim 8, characterized in that: the valve core assembly comprises a nut piece and a valve core, the valve core is used as an injection molding insert, the nut piece is formed by injection molding, the nut piece is provided with a threaded hole and a pore passage, the other end of the screw rod extends into the threaded hole and is in threaded connection with the nut piece, the number of the pore passages is at least one, the pore passages penetrate through the nut piece along the axial direction of the nut piece, and the pore passages are communicated with the second flow passage and the first mounting cavity of the connecting seat.

10. An assembly method of an electric valve, the electric valve comprising a rotor assembly, a screw rod, a stop assembly, a valve core assembly and a valve core seat assembly, the stop assembly comprising a stop seat, a guide rod and a stop ring, the valve core seat assembly comprising a valve port portion, the assembly method comprising the steps of: