CN116201912A - Electric valve - Google Patents

Abstract

In one embodiment provided by the application, a main valve core of an electric valve comprises a main valve core frame and a first part, the main valve core frame and the first part are arranged in a split manner, the material of the first part comprises a resin material, the first part is fixedly connected with the main valve core frame, the first part comprises a main valve core part and an auxiliary valve seat, the main valve core part and the auxiliary valve seat are of an integrated structure, the main valve core part can close or open a main valve port, the first part is further provided with an auxiliary valve port, the auxiliary valve port is formed in the auxiliary valve seat, the auxiliary valve port penetrates through the auxiliary valve seat along the axial direction of the electric valve, the electric valve further comprises an auxiliary valve core, at least part of the auxiliary valve core is positioned in the main valve core frame, and the auxiliary valve core can open or close the auxiliary valve port or adjust the flow area of the auxiliary valve port; this arrangement is advantageous in improving the sealing performance of the motor-operated valve.

Description

an electric valve

technical field

The present application relates to the technical field of fluid control, in particular to an electric valve.

Background technique

The electric valve has a main valve core, a main valve port, and an auxiliary valve core. The main valve core is formed with an auxiliary valve seat, and the auxiliary valve seat is formed with an auxiliary valve port. The main valve core is used to open and close the main valve port. Close the auxiliary valve port or adjust the flow area of the auxiliary valve port. When the main valve core closes the main valve port, the auxiliary valve core cooperates with the auxiliary valve port to adjust the small flow of the working medium. When the main valve port is closed and or the auxiliary valve port is closed When there is a problem of leakage of the working medium, how to improve the sealing performance of the electric valve is a technical problem that needs to be considered by those skilled in the art.

Contents of the invention

The purpose of this application is to provide an electric valve, which is beneficial to improve the sealing performance of the electric valve.

In order to achieve the above object, the application adopts the following technical solutions:

An electric valve, comprising a main valve seat and a main valve core, the main valve seat has a main valve port, the main valve core includes a main valve core frame and a first part, the main valve core frame and the first The parts are arranged separately, the material of the first part includes resin material, the first part is fixedly connected with the main valve core frame, the first part includes a main valve core part and an auxiliary valve seat, and the main valve The core part and the auxiliary valve seat are integrally structured, the main valve core part can close or open the main valve port, and the first part also has an auxiliary valve port, and the auxiliary valve port is formed on the auxiliary valve seat , along the axial direction of the electric valve, the auxiliary valve port passes through the auxiliary valve seat, the electric valve also includes an auxiliary valve core, at least part of the auxiliary valve core is located in the main valve core frame, the The auxiliary valve core can open or close the auxiliary valve port or adjust the flow area of the auxiliary valve port.

In an embodiment provided by the present application, the main spool of the electric valve includes a main spool frame and a first part, the main spool frame and the first part are separately arranged, the material of the first part includes a resin material, and the first part It is fixedly connected with the main valve core frame. The first part includes the main valve core part and the auxiliary valve seat. The main valve core part and the auxiliary valve seat are integrated. The main valve core part can close or open the main valve port. The first part also has a secondary The valve port and the auxiliary valve port are formed on the auxiliary valve seat. Along the axial direction of the electric valve, the auxiliary valve port runs through the auxiliary valve seat. The electric valve also includes an auxiliary valve core. At least part of the auxiliary valve core is located in the main valve core frame. The auxiliary valve core It can open or close the auxiliary valve port or adjust the flow area of the auxiliary valve port; this setting is beneficial to improve the sealing performance of the electric valve.

Description of drawings

Fig. 1 is a structural schematic view of a perspective of the first embodiment of the electric valve provided by the present application;

Fig. 2 is a schematic cross-sectional structure diagram of the electric valve in Fig. 1 along the A-A plane, which is a schematic diagram of the electric valve in a fully closed state;

Fig. 3 is a schematic cross-sectional structure diagram of the electric valve in Fig. 1 along the A-A plane, which is a schematic diagram of the electric valve in a small flow conduction state;

Fig. 4 is a schematic cross-sectional structure diagram of the electric valve in Fig. 1 along the A-A plane, which is a schematic diagram of the electric valve in a large flow conduction state;

Fig. 5 is a structural representation of the valve device in Fig. 2;

Fig. 6 is a schematic cross-sectional structure diagram of the valve device in Fig. 5 along the B-B plane;

Fig. 7 is a schematic cross-sectional structure diagram of the first part in Fig. 2;

Fig. 8 is a schematic cross-sectional structure diagram of a second embodiment of the electric valve;

Fig. 9 is a schematic diagram of an enlarged structure of part A in Fig. 8;

FIG. 10 is a schematic cross-sectional structure diagram of the first component in FIG. 8 .

Detailed ways

The present invention will be further described below in conjunction with accompanying drawing and specific embodiment:

1 and 2, in the first embodiment of the electric valve 100, the electric valve 100 includes a valve device 1 and an installation part 2, at least part of the valve device 1 is placed in the installation part 2 and is fixedly connected with the installation part 2 or limited. The above-mentioned connection methods include screw connection, screw connection and pin connection, etc. In this embodiment, the valve device 1 and the installation part 2 are fixed by screw connection. For convenience of description, up and down are defined as the up and down directions of the drawings in the drawings, and up and down only represent relative positions.

1 and 2, in this embodiment, the valve device 1 includes a coil assembly 11, a valve seat assembly 12, a rotor assembly 13, a sleeve 14, a rotor shaft 15 and a nut assembly 16, and the coil assembly 11 is fixedly connected to the installation part 2 , The connection method includes screw connection, welding and so on. The coil assembly 11 includes a stator assembly 111 and an injection molding body 112 , and the injection molding body 112 wraps at least part of the stator assembly 111 . The lower end of the sleeve 14 is connected to the valve seat assembly 12 by welding, and part of the sleeve 14 is located between the rotor assembly 13 and the stator assembly 111. Passing a predetermined current to the coil assembly 11 can generate an excitation magnetic field, the rotor assembly 13 can rotate in the excitation magnetic field, the rotor assembly 1313 drives the rotor shaft 15 to rotate, and the rotor shaft 15 is threadedly matched with the nut assembly 16, so that the rotor shaft 15 is opposite to the nut Assembly 16 moves up and down.

Referring to FIGS. 2-7 , in this embodiment, the valve seat assembly 12 includes a main valve seat 3 , and the main valve seat 3 has a main valve port 31 . The valve device 1 also includes a main spool 4 and a secondary spool 5, the main spool 4 includes a main spool frame 41 and a first part 42, the first part 42 is fixedly connected with the main spool frame 41, the material of the first part 42 Including resin materials, resin materials include polyetheretherketone (PEEK), polytetrafluoroethylene (PTFE, Poly tetrafluoroethylene) and the like. The first part 42 includes a main valve core part 421 and an auxiliary valve seat 422. The main valve core part 421 and the auxiliary valve seat 422 are integrally structured. The main valve core part 421 can abut against the main valve seat 3 to close or open the main valve port. 31. The first part 42 also includes an auxiliary valve port 4221, which is formed on the auxiliary valve seat 422. Along the axial direction of the electric valve, the auxiliary valve port 4221 runs through the auxiliary valve seat 422, and at least part of the auxiliary valve core 5 is located on the main valve Inside the core frame 41 , the auxiliary valve core 5 can open or close the auxiliary valve port 4221 or adjust the flow area of the auxiliary valve port 4221 . In this embodiment, the rotor shaft 15 and the auxiliary valve core 5 are separately arranged and connected, and the rotor shaft 15 can drive the auxiliary valve core 5 to move relative to the auxiliary valve seat 422. In other embodiments, the rotor shaft 15 and the auxiliary valve core 5 also Can be set in one piece. In this embodiment, the first part 42 is made of resin material, and the main valve seat 3 and the auxiliary valve core 5 are made of metal materials. Therefore, the first part 42 is made of resin material, which can improve the sealing performance of the main valve port 31 and the auxiliary valve port 4221. Reliability, reduce leakage of working medium, and reduce wear and tear at the same time. Moreover, in this application, only one first component 42 is required to improve the sealing reliability of the main valve port 31 and the auxiliary valve port 4221 at the same time, which is beneficial to simplify the production process and reduce parts.

2-7, in this embodiment, the valve device 1 also includes an elastic member 17, the elastic member 17 includes a spring and an elastic plate, the elastic member 17 is located in the inner cavity of the auxiliary valve core 5, and the lower end of the elastic member 17 is connected to the The main valve core 4 abuts, and the upper end of the elastic member 17 abuts against the auxiliary valve core 5. The elastic member 17 can apply a force towards the main valve seat 3 to the main valve core 4, and can push the main valve core 4 to the main valve seat. 3. In other embodiments, the elastic member 17 may be located between the main valve core 4 and the nut assembly 16, the lower end of the elastic member 17 is in contact with the main valve core 4, and the upper end of the elastic member 17 is in contact with the nut assembly 16. A force can be applied to the main valve core 4 towards the main valve seat 3 , thereby pushing the main valve core 4 towards the main valve seat 3 .

Referring to FIGS. 2-7 , in this embodiment, the installation part 2 includes an installation cavity 21 , a first flow channel 22 and a second flow channel 23 , and at least part of the valve seat assembly 12 is located in the installation cavity 21 . The valve seat assembly 12 includes a second communication hole 121 located on the side wall of the valve seat assembly 12 , and the second communication hole 121 can communicate with the first flow channel 22 and the inner cavity of the valve seat assembly 12 . The electric valve includes a first valve cavity 101. In this embodiment, the first valve cavity 101 is the inner cavity of the valve seat assembly 12. The first valve cavity 101 can communicate with the main valve port 31, and the main valve core 4 is located in the first inner cavity. 101 , of course, in other embodiments, the first valve chamber 101 may be a part of the installation chamber 21 , and at least part of the main valve core 4 is located in the first inner chamber 101 . The main spool frame 41 has a first communication hole 411 and an inner cavity, the first communication hole is located on the side wall of the main spool frame 41 , along the radial direction of the main spool frame 41 , the first communication hole 411 runs through the main spool frame 41 The inner cavity of the main valve core holder 41 can communicate with the auxiliary valve port 4221, and the first communication hole 411 can communicate with the inner cavity of the main valve core holder 41 and the inner cavity of the valve seat assembly 12. Along the axial direction of the electric valve, the first The communication hole 411 is closer to the coil assembly 11 than the first member 42 is. The main valve core frame 41 or the valve seat assembly 12 has a first recess 412, the first recess 412 is located on the outer side wall of the main valve core 4 or the inner side wall of the valve seat assembly 12, the first communication hole 411 can be connected with the first recess 412, when the main valve core 4 is in contact with the main valve seat 3 and the auxiliary valve core 5 is separated from the auxiliary valve seat 422 by a certain distance, the second flow channel 23 passes through the auxiliary valve port 4221 and the inner part of the main valve core frame 41 in sequence. The cavity, the first communication hole 411 , the first recessed portion 412 , and the second communication hole 121 communicate with the first flow channel 22 . In this embodiment, the main valve seat 3 is located on the valve seat assembly 12, the main valve seat 3 includes a protruding portion 32, the main valve core portion 421 of the first component 42 can abut against the protruding portion 32, close the main valve port 31, and the main valve The seat 3 also has an anti-interference groove 33 , the bottom surface of the anti-interference groove 33 is lower than the highest point of the protruding part 32 , which can prevent the first part 42 or the main valve core holder 41 from interfering with parts other than the protruding part 32 . In other embodiments, the main valve seat 3 can be arranged on the installation part 2 , at this time, the structure of the main valve seat 3 is similar to that arranged on the valve seat assembly 12 , and will not be repeated here. The installation part 2 can be formed separately or can be a part of other parts, such as a part of the heat exchanger assembly, or the installation part 2 can be formed separately and fixed with other parts. In this embodiment, the installation part 2 is a separate valve block. In other embodiments, the installation part 2 may be a sleeve-shaped valve body.

Referring to Fig. 2-Fig. 4, the working state of the electric valve 100 includes a fully closed state, a small flow conduction state and a large flow conduction state:

Referring to Figure 2, in the fully closed state, the auxiliary valve core 5 abuts against the auxiliary valve seat 422, the auxiliary valve port 4221 is closed, and the main valve core 4 abuts against the main valve seat 3 under the action of the elastic member 17 and the auxiliary valve core 5 , the main valve port 31 is closed, and no working medium flows between the first flow channel 22 and the second flow channel 23;

Referring to Fig. 3, in the state of small flow conduction, the main valve core 4 is in contact with the main valve seat 3 under the action of the elastic member 17, the main valve port 31 is closed, and the auxiliary valve core 5 is under the belt of the rotor shaft 15, away from or Close to the auxiliary valve seat 422, so as to adjust the flow area of the auxiliary valve port 4221, and then adjust the flow rate of the working medium between the first flow channel 22 and the second flow channel 23;

Referring to Fig. 4, in the state of high flow conduction, the auxiliary valve core 5 is far away from the auxiliary valve seat 422, and the auxiliary valve core 5 drives the main valve core 4 away from the main valve port 31, the main valve port 31 is opened, the first flow and the second flow The channels 23 are in a large flow conduction state. In this way, the functions of the solenoid valve and the electric throttle valve can be integrated, reducing the space occupied by the valve and reducing the weight.

2-7, in the first embodiment of the electric valve, the first part 42 and the main valve core frame 41 are fixed by injection molding, the first part 42 is located at the relatively lower position of the main valve core 4, and the auxiliary valve port 4221 Near the center of the auxiliary valve seat 422, along the axial direction of the electric valve, the auxiliary valve port 4221 runs through the auxiliary valve seat 422, and along the radial direction of the electric valve, the main valve core 421 faces away from the auxiliary valve seat 422. The axis extends, and the first part 42 also includes a first flange portion 423. Along the radial direction of the electric valve, the first flange portion 423 extends from the auxiliary valve seat 422 to the axis of the auxiliary valve seat 422, and along the axial direction of the electric valve. , the first flange portion 423 is closer to the coil assembly 11 than the main valve core portion 421 . The first part 42 also has a first groove 424 , and the first groove 424 is located between the main valve core part 421 and the first flange part 423 along the axial direction of the electric valve. The main valve core frame 41 includes a second flange portion 413, the second flange portion 413 extends along the radial direction of the electric valve toward the axis of the auxiliary valve seat 422, at least part of the second flange portion 413 is located in the first groove 424, the main The bottom of the spool holder 41 and the upper end of the main spool portion 421 are bonded by injection molding, and the upper end of the second flange portion 413 is bonded to the bottom of the first flange portion 423 by injection molding. The second flange portion 413 can be Provide support for the first flange portion 423 to improve the reliability of the connection between the first component 42 and the main valve core frame 41 .

2-7, in this embodiment, the auxiliary spool 5 includes a valve needle portion 51, a large diameter portion 52 and an auxiliary spool sleeve 53, the outer diameter of the large diameter portion 52 is larger than the outer diameter of the auxiliary spool sleeve 53, The outer diameter of the large-diameter portion 52 is larger than the outer diameter of the needle portion 51, and the outer diameter of the large-diameter portion 52 is slightly smaller than the inner diameter of the main valve core frame 41, and the inner peripheral wall of the main valve core frame 41 can provide guidance for the large-diameter portion 52, The valve needle portion 51 has a tapered portion, and the tapered portion cooperates with the auxiliary valve port 4221 to adjust the flow area of the auxiliary valve port 4221 . The electric valve also includes a limiting part 414, which is annular, and the limiting part 414 has a central through hole, and the diameter of the central through hole is smaller than the outer diameter of the large diameter part 52, and part of the auxiliary valve core sleeve 53 is located in the limiting part. The central through hole of 414, the outer part of the limiting part 414 is fixedly connected with the upper end of the main valve core frame 41, and the connection method includes welding and riveting. The limiting part 414 can prevent the large diameter part 52 from coming out of the inner cavity of the main valve core 4 , so that the auxiliary spool 5 can drive the main spool 4 to move. In other embodiments, the limiting portion 414 can also be a part of the main valve core frame 41, and the limiting portion 414 can be folded toward the side where the central axis of the main valve core 4 is located by an external force, so as to limit the large-diameter portion 52 from The inner cavity of the main spool 4 comes out. In this embodiment, the elastic member 17 is located in the inner cavity of the main valve core 4, the upper end surface of the elastic member 17 is in contact with the lower end surface of the large-diameter portion 52, and the lower end surface of the elastic member 17 is in contact with the upper end surface of the first flange portion 423. When abutting, the elastic member 17 is in a compressed state, exerting a force on the main valve core 4 toward the main valve seat 3 , thereby pushing the main valve core 4 to the main valve seat 3 . In other embodiments, when the inner diameter of the elastic member 17 is greater than the outer diameter of the first flange portion 423 , the lower end surface of the elastic member 17 abuts against the upper end surface of the second flange portion 413 .

8-10, in the second embodiment of the electric valve, the first part 42 and the main valve core frame 41 are fixed by riveting. The auxiliary valve port 4221 is formed on the auxiliary valve seat 422. Along the axial direction of the electric valve, the auxiliary valve port 4221 runs through the auxiliary valve seat 422. Along the direction of the electric valve, the main valve core 421 is from the auxiliary valve seat 422 to the auxiliary valve seat 422. The main valve core frame 41 includes a first end 416 and a retainer 415, part of the first end 416 extends along the radial direction of the electric valve toward the axis of the secondary valve seat 422, and the retainer 415 extends from the first end 416 It extends away from the coil assembly 11 along the axial direction of the electric valve. The main spool part 421 includes a receiving part 4211, and part of the first component 42 is located in the receiving part 4211. The wall forming the receiving part 4211 includes part of the lower end surface of the first end part 416, part of the inner wall of the cage 415, and at least part of the first part 42. Located in the receiving portion 4211 , in this embodiment, the lower end of the elastic member 17 abuts against the first end 416 .

8-10, in this embodiment, the cage 415 includes a riveting portion 4151, the riveting portion 4151 is located at the end of the cage 415, the riveting portion 4151 is folded toward the side where the main valve core 4 is located, and the riveting The first part 4151 abuts against the lower end of the first part 42, and the first part 42 is pressed between the lower end surface of the first end part 416 and the riveting part 4151, thereby restricting the first part 42 from detaching from the main valve core holder 41, and The first component 42 is fixedly connected with the main valve core frame 41 . The first end portion 416 has a central hole 4161, and part of the auxiliary valve seat 422 is located in the central hole. The diameter of the central hole 4161 is smaller than the outer diameter of the auxiliary valve seat 422. The auxiliary valve seat 422 is in interference fit with the first end portion 416, and the auxiliary valve seat The arrangement of 422 and the first end portion 416 with an interference fit can further improve the reliability of the connection between the first component 42 and the main valve core frame 41 .

It should be noted that the above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described in the present invention. Although the specification has described the present invention in detail with reference to the above-mentioned embodiments, those of ordinary skill in the art It should be understood that those skilled in the art can still make modifications or equivalent replacements to the present invention, and all technical solutions and improvements that do not depart from the spirit and scope of the present invention shall be covered by the claims of the present invention.

Claims (13)

1. The utility model provides an electric valve, includes main disk seat, main valve core, the main valve seat has the main valve port, the main valve core includes main valve core frame and first part, main valve core frame with first part components of a whole that can function independently sets up, the material of first part includes the resin material, first part with main valve core frame fixed connection, first part includes main valve core and auxiliary valve seat, main valve core with auxiliary valve seat integrated structure, main valve core can be closed or open the main valve mouth, first part still has the auxiliary valve port, the auxiliary valve port take shape in the auxiliary valve seat, along the axial of electric valve, the auxiliary valve port runs through the auxiliary valve seat, electric valve still includes the auxiliary valve core, at least part auxiliary valve core is located in the main valve core frame, auxiliary valve core can be opened or closed the auxiliary valve port or adjust the flow area of auxiliary valve port.

2. The electrically operated valve of claim 1, wherein the electrically operated valve comprises a coil assembly, a rotor assembly, the coil assembly capable of rotating the rotor assembly; the electric valve is provided with a first valve cavity, the first valve cavity can be communicated with the main valve opening, the main valve core frame is provided with a first communication hole and an inner cavity, the inner cavity of the main valve core frame can be communicated with the auxiliary valve opening, the first communication hole penetrates through the main valve core frame in the radial direction of the main valve core frame, the first communication hole is communicated with the inner cavity of the main valve core frame and the first valve cavity, and the first communication hole is closer to the coil assembly than the first component in the axial direction of the electric valve.

3. The electrically operated valve of claim 2 wherein said primary spool mount is injection molded with said first member, said resin material comprising polyetheretherketone, polytetrafluoroethylene.

4. The electrically operated valve of claim 3 wherein said main valve core extends from said auxiliary valve seat away from an axis of said auxiliary valve seat in a radial direction of said electrically operated valve, said first member further comprising a first flange portion extending from said auxiliary valve seat away from an axis of said auxiliary valve seat in a radial direction of said electrically operated valve, said first flange portion being closer to said coil assembly than said main valve core in an axial direction of said electrically operated valve.

5. The electrically operated valve of claim 4 wherein said first member has a first groove located between said main valve core and said first flange portion in an axial direction of said electrically operated valve, said main valve spool holder including a second flange portion extending in a radial direction of said electrically operated valve toward an axis of said auxiliary valve seat, at least a portion of said second flange portion being located in said first groove, a bottom portion of said main valve spool holder being injection molded in registry with an upper end portion of said main valve core, an upper end portion of said second flange portion being injection molded in registry with a bottom portion of said first flange portion.

6. The electrically operated valve of claim 2 wherein said first member is fixed to said main spool support by riveting, and said resinous material comprises polyetheretherketone, polytetrafluoroethylene.

7. The electrically operated valve of claim 6 wherein said main valve core extends from said secondary valve seat away from an axis of said secondary valve seat, said main valve core frame including a first end portion and a retainer, a portion of said first end portion extending radially of said electrically operated valve toward said axis of said secondary valve seat, said retainer extending from said first end portion axially of said electrically operated valve away from said coil assembly.

8. The electrically operated valve of claim 7 wherein said main valve core includes a receiving portion, a wall constituting said receiving portion including a portion of a lower end face of said first end portion, a portion of an inner wall of said retainer, at least a portion of said first member being located within said receiving portion, said retainer including a swage portion located at a distal end of said retainer, said swage portion being folded toward a side of an axis of said main valve core frame, said swage portion abutting a lower end portion of said first member, said first member being compressed between said lower end face of said first end portion and said swage portion.

9. The electrically operated valve of claim 8 wherein said first end has a central bore, a portion of said secondary valve seat being located in said central bore, said central bore having a smaller bore diameter than an outer diameter of said secondary valve seat, said secondary valve seat being in an interference fit with said first end.

10. The electric valve according to claim 5 or 9, characterized in that the sub-spool further includes a needle portion, a large diameter portion, and a sub-spool sleeve, the large diameter portion having an outer diameter larger than an outer diameter of the needle portion, the large diameter portion having an outer diameter smaller than an inner diameter of the main spool holder; the electric valve further comprises a limiting part, the limiting part is provided with a central through hole, a part of the auxiliary valve core sleeve is positioned in the central through hole of the limiting part, the limiting part is fixedly connected with the upper end part of the main valve core frame, and the aperture of the central through hole is smaller than the outer diameter of the large-diameter part; the electric valve further comprises an elastic component, the elastic component is located in the inner cavity of the main valve core, the lower end portion of the elastic component is in contact with the first flange portion, the second flange portion or the first end portion, and the upper end portion of the elastic component is in contact with the lower end face of the large-diameter portion.

11. The electrically operated valve of claim 10, including a valve seat assembly including the first interior cavity, the main valve spool being located in the first interior cavity, the main valve seat being located in the valve seat assembly, the main valve seat including a protrusion, the main valve spool of the first component being capable of abutting the protrusion to close the main valve port.

12. The electrically operated valve of claim 10 further comprising a mounting portion including a first interior cavity, at least a portion of the main valve spool being located in the first interior cavity, the main valve seat being located in the mounting portion, the main valve seat including a protrusion, the main valve spool of the first component being capable of abutting the protrusion to close the main valve port.

13. The electrically operated valve of claim 11 or 12, further comprising a nut assembly and a rotor shaft, one end of the rotor shaft being connected to the rotor assembly and the other end being connected to the secondary spool, the rotor assembly rotating the rotor shaft, the rotor shaft being threadedly engaged with the nut assembly to axially actuate the secondary spool; the electric valve comprises a large-flow conducting state and a small-flow regulating state, wherein in the small-flow regulating state, the main valve core is abutted with the main valve seat, and the auxiliary valve core regulates the flow area of the auxiliary valve port; in a large-flow conduction state, the auxiliary valve core is far away from the auxiliary valve port, the main valve core is far away from the main valve port, and the main valve port is in a large-flow conduction state.

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