Direct-acting high-pressure electromagnetic valve

Abstract

The utility model provides a direct-acting high-pressure electromagnetic valve which comprises a valve body, a valve port sealing assembly, a coil assembly and a movable iron core, and a medium outlet and a mounting cavity are formed in the valve body; the valve port sealing assembly is installed in the installation cavity in a limited mode and comprises a sealing piece and a supporting piece. The coil assembly comprises a coil framework connected with the valve body, and the coil framework is provided with a medium inlet and a first medium channel. The movable iron core is installed in the coil framework in a sliding mode, a valve port is formed in one end of the movable iron core, and the valve port can abut against the sealing piece so that the valve can be closed. The movable iron core is provided with a second medium channel used for communicating the valve port with the first medium channel, and the valve element sealing assembly is installed between the valve body and the coil framework in a limited mode. The direct-acting type high-pressure electromagnetic valve has the advantages of being high in pressure, small in pressure loss, simple in structure, high in response speed, high in protection grade, reliable in sealing, long in service life and the like.

Description

Technical Field

[0001] The utility model relates to the field of electromagnetic valves, in particular to a direct-acting high-pressure electromagnetic valve. Background Art

[0002] The high-pressure solenoid valve of the prior art adopts a direct-acting structure for small diameters, and the general flow diameter is less than 3.0mm, which cannot meet the demand for large flow and cannot be used for high-pressure media; the large diameter adopts a pilot structure, and uses the pressure difference to open and close the valve, but this structure has a slow reaction time and a complex structure, which cannot meet the requirements of fast valve switching. In addition, the design of conventional solenoid valves is low inlet and high outlet, and the flow rate will be about 1 / 3 of the normal value. In addition, the solenoid valve of the prior art generally adopts a design in which the valve body and the coil are separated. This design requires a large space for installation and cannot meet the requirements of integrated installation. Imagine if the solenoid valve is made axial, that is, the inlet and outlet and the coil are on the same center line, this can greatly reduce the installation space of the solenoid valve, and the medium resistance passing through the solenoid valve can also be reduced synchronously, thereby reducing the pressure loss of the medium and meeting the flow demand. At the same time, the solenoid valve is designed as a direct-acting structure, which can quickly open and close the valve, and increase the working pressure of the solenoid valve without increasing the coil power. Utility Model Content

[0003] 1. Technical issues to be resolved

[0004] The problem to be solved by the utility model is to provide a direct-acting high-pressure solenoid valve, which adopts a direct-acting structure, can be suitable for high-pressure media, has the characteristics of high working pressure, good sealing performance, small medium pressure loss, simple structure, short switch response time and long service life.

[0005] (II) Technical solution

[0006] In order to solve the technical problem, the utility model provides a direct-acting high-pressure solenoid valve, comprising:

[0007] A valve body, on which a medium outlet and a mounting cavity that are interconnected are provided;

[0008] A valve port sealing assembly is limitedly installed in the installation cavity, and comprises a sealing member and a supporting member embedded in the sealing member;

[0009] The coil assembly comprises a coil frame threadedly connected to the valve body; the coil frame is provided with a medium inlet and a first medium channel which are interconnected;

[0010] A movable iron core is vertically slidably mounted in the coil frame; a valve port is provided at one end of the movable iron core facing the valve port sealing assembly, and the valve port can be abutted against the sealing member to close the valve; a second medium channel for connecting the valve port and the first medium channel is axially provided on the movable iron core;

[0011] The valve core sealing component is installed between the valve body and the coil frame in a limited position and is sleeved on the movable iron core.

[0012] In some embodiments, the valve port sealing assembly further includes a sealing member base disposed in the installation cavity, a plurality of arc-shaped through holes for medium to pass are arranged in an annular manner at equal intervals on the sealing member base, and the sealing member is fixed on the sealing member base.

[0013] In some embodiments, the valve core sealing assembly includes a base abutting against the valve body and an end cover abutting against the coil frame, a pan-seal is installed between the base and the end cover, and the pan-seal abuts against the outer wall of the movable iron core. The base is provided with a limiting flange toward the valve port sealing assembly, and the limiting flange abuts against the valve port sealing assembly; a first sealing ring is installed between the base and the valve body, a second sealing ring is installed between the end cover and the base, and a third sealing ring is installed between the end cover and the coil frame.

[0014] In some embodiments, a first contraction portion is provided at one end of the movable iron core facing the valve port sealing assembly, and the valve core sealing assembly is sleeved on the first contraction portion; the valve port is provided at the end of the first contraction portion, a first chamfer is provided on the outer side of the valve port, and a second chamfer is provided on the inner side thereof, and a valve port sealing surface for fitting and sealing with the seal is formed between the second chamfer and the first chamfer.

[0015] In some embodiments, a spring is installed between the movable iron core and the coil frame, and the spring always makes the movable iron core tend to move toward the sealing member; a spring flange is provided on the movable iron core protruding outward, one end of the spring is abutted against the coil frame, and the other end is abutted against the spring flange; when the valve is closed, the distance between the lower end of the spring flange and the valve core sealing assembly is 0.5 mm; an annular mounting groove is provided at one end of the movable iron core away from the valve port sealing assembly, and a guide ring is installed in the annular mounting groove, and the guide ring is in sliding contact with the inner wall of the coil frame; a through hole is radially provided in the movable iron core, the through hole is connected to the second medium channel, and the through hole is located on the upper side of the valve core sealing assembly.

[0016] In some embodiments, the coil skeleton includes a magnetic isolation tube seat, a magnetic isolation tube and a static iron core fixedly connected in sequence from bottom to top, and the magnetic isolation tube seat is threadedly connected to the valve body; the lower end of the static iron core is provided with a suction surface, and the suction surface extends into the magnetic isolation tube, and the medium inlet and the first medium channel are axially arranged in the static iron core; an annular protrusion is provided on the static iron core, and an annular winding portion is formed between the annular protrusion and the magnetic isolation tube seat; the annular winding portion is coated with an insulating coating, and the annular winding portion is wound with enameled wire.

[0017] In some embodiments, a second contraction portion is provided at the lower end of the static iron core, and the upper end of the magnetic isolation tube is sleeved on the second contraction portion; a stepped plug-in portion is provided at the lower end of the magnetic isolation tube, and a stepped slot adapted to the stepped plug-in portion is provided on the magnetic isolation tube seat; the magnetic isolation tube seat, the magnetic isolation tube and the static iron core are coaxially arranged and fixed in sequence by laser welding.

[0018] In some embodiments, the attraction surface is located at one-third of the height of the annular winding portion; a magnetic isolation ring is fixed on the attraction surface; a wire threading hole is provided on the annular protrusion, and leads are passed through the wire threading holes, and the leads are electrically connected to both ends of the enameled wire respectively; a plastic sealing film is provided on the outside of the enameled wire; a cover shell is threadedly connected to the magnetic isolation tube seat, and the cover shell covers the outside of the coil frame and the enameled wire.

[0019] In some embodiments, the valve body, the valve port sealing assembly, the coil assembly, the movable iron core and the valve core sealing assembly are located on the same axis, and the medium outlet, the valve port, the second medium channel, the first medium channel and the medium inlet are located on the same axis.

[0020] (III) Beneficial effects

[0021] The utility model provides a direct-acting high-pressure solenoid valve, which has the following advantages compared with the prior art:

[0022] 1) The direct-acting structure is adopted, and the centers of the medium inlet, medium outlet, movable iron core and coil assembly are on the same axis, making the solenoid valve structure more compact. At the same time, the resistance of the fluid passing through will be reduced, so the pressure drop will also be reduced;

[0023] 2) An iron support is embedded in the middle of the valve port sealing component. The support can support the seal, and can withstand higher pressure while providing effective sealing, effectively improving the pressure resistance of the solenoid valve; when the solenoid valve is closed, the valve core sealing component separates the installation cavity and the inner cavity of the coil frame. The greater the pressure at both ends of the solenoid valve, the better the sealing performance; the medium entering the medium inlet directly passes through the movable iron core along the axial direction to reach the valve port. When the coil is not energized, the valve port is pushed against the seal by the pressure of the spring and the medium. At this time, the greater the pressure of the medium, the tighter the valve port is closed and the better the sealing performance;

[0024] 3) The valve port is provided with a first chamfer and a second chamfer, which reduce the sealing surface of the valve port, which can effectively seal and reduce the electromagnetic force required to open the solenoid valve, thereby increasing the working pressure of the solenoid valve; the wear-resistant and lubricating property of the guide ring can not only ensure the reliability of the moving process of the movable iron core, but also allow the movable iron core to move on the same axis as much as possible, providing a guarantee for reliable sealing;

[0025] 4) The coil skeleton composed of the static iron core, the magnetic isolation tube and the magnetic isolation tube seat is treated with an insulating coating, which can not only withstand high-voltage breakdown, but also withstand high-pressure media; the surface of the coil skeleton has an insulating coating, so that the inner hole of the coil skeleton becomes a magnetic isolation tube in the traditional sense of the solenoid valve, which actually eliminates the magnetic isolation tube and makes the structure simpler; in addition, the distance between the active iron core and the enameled wire is closer, and the air gap between the magnetic isolation tube and the enameled wire is eliminated. In actual work, the beneficial electromagnetic force generated by the coil will be greatly increased, the valve can be opened reliably, and it is suitable for high-pressure media;

[0026] 5) The outer layer of the enameled wire is plastic-sealed, and the lead-wire structure can achieve a higher level of protection; the medium inlet is set on the static iron core, making the solenoid valve more compact and simpler in structure; a magnetic isolation ring is set between the static iron core and the movable iron core, which greatly improves the switching speed of the solenoid valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 This is a structural schematic diagram of a direct-acting high-pressure solenoid valve of the utility model;

[0029] Figure 2 This is a structural schematic diagram of a valve port sealing assembly of a direct-acting high-pressure solenoid valve of the utility model;

[0030] Figure 3 This is a structural schematic diagram of a valve core sealing assembly of a direct-acting high-pressure solenoid valve of the utility model;

[0031] Figure 4 This is a structural schematic diagram of a movable iron core of a direct-acting high-pressure solenoid valve of the utility model;

[0032] Figure 5 for Figure 4 A magnified view of part A;

[0033] Figure 6 This is a structural schematic diagram of a direct-acting high-voltage solenoid valve coil assembly of the utility model;

[0034] Figure 7 This is a schematic diagram of the structure of a direct-acting high-pressure solenoid valve coil skeleton of the utility model;

[0035] The names of the components corresponding to the reference numerals in the figure are: 1. valve body; 101. medium outlet; 102. installation cavity; 2. valve port sealing assembly; 21. sealing member; 22. support member; 23. sealing member base; 231. arc-shaped through hole; 3. coil assembly; 31. coil skeleton; 32. enameled wire; 33. magnetic isolation ring; 34. plastic film; 35. cover; 311. magnetic isolation tube seat; 312. magnetic isolation tube; 313. static iron core; 314. annular winding part; 3111. stepped slot; 3121. stepped plug-in part; 3131. medium inlet; 3132. first medium channel; 31 33. Suction surface; 3134. Annular protrusion; 3135. Second contraction portion; 3136. Threading hole; 4. Movable iron core; 41. Guide ring; 401. Valve port; 402. Second medium channel; 403. First contraction portion; 404. First chamfer; 405. Second chamfer; 406. Valve port sealing surface; 407. Spring flange; 408. Annular mounting groove; 409. Through hole; 5. Valve core sealing assembly; 51. Base; 52. End cover; 53. Pan seal; 54. First sealing ring; 55. Second sealing ring; 56. Third sealing ring; 511. Limiting flange; 6. Spring. DETAILED DESCRIPTION

[0036] The present application is described in detail below with reference to the accompanying drawings and specific embodiments.

[0037] The following describes the implementation methods of the present application through specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The present application can also be implemented or applied through other different specific implementation methods, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that, in the absence of conflict, the following embodiments and the features in the embodiments can be combined with each other. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work belong to the scope of protection of the present application.

[0038] It should be noted that various aspects of the embodiments within the scope of the appended claims are described below. It should be apparent that the aspects described herein can be embodied in a wide variety of forms, and any specific structure and / or function described herein is merely illustrative. Based on the present application, it should be understood by those skilled in the art that an aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number and aspect described herein can be used to implement the device and / or practice the method. In addition, other structures and / or functionalities other than one or more of the aspects described herein can be used to implement this device and / or practice this method.

[0039] It should also be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present application. The drawings only show components related to the present application rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0040] Additionally, in the following description, specific details are provided to facilitate a thorough understanding of the examples. However, it will be understood by those skilled in the art that the examples can be practiced without these specific details.

[0041] The technical solutions provided by various embodiments of the present application are described below in conjunction with the accompanying drawings.

[0042] See also Figures 1 to 7 The utility model provides a direct-acting high-pressure solenoid valve, comprising a valve body 1, a valve port sealing assembly 2, a coil assembly 3, a movable iron core 4 and a valve core sealing assembly 5.

[0043] See also Figure 1 and Figure 2The valve body 1 is provided with a medium outlet 101 and an installation cavity 102 which are interconnected, and the medium outlet 101 and the installation cavity 102 are arranged along the axis of the valve body 1. The valve port sealing assembly 2 is limitedly installed in the installation cavity 102, and includes a sealing member 21 and a support member 22 embedded in the sealing member 21, and the support member 22 is used to support the sealing member 21. The coil assembly 3 includes a coil skeleton 31 which is threadedly connected to the valve body 1, and the coil skeleton 31 is provided with a medium inlet 3131 and a first medium channel 3132 which are interconnected. The movable iron core 4 is vertically slidably installed in the coil skeleton 31; the movable iron core 4 is provided with a valve port 401 at one end facing the valve port sealing assembly 2, and the valve port 401 can be placed on the sealing member 21 to close the valve, and the valve port 401 is separated from the sealing member 21 to open the valve. A second medium channel 402 which is used to connect the valve port 401 and the first medium channel 3132 is axially arranged on the movable iron core 4. The valve core sealing assembly 5 is installed between the valve body 1 and the coil frame 31 and is sheathed on the movable iron core 4 .

[0044] See also Figure 1 The valve body 1, the valve port sealing assembly 2, the coil assembly 3, the movable iron core 4 and the valve core sealing assembly 5 are located on the same axis, and the medium outlet 101, the valve port 401, the second medium channel 402, the first medium channel 3132 and the medium inlet 3131 are located on the same axis.

[0045] The solenoid valve adopts a direct-acting structure, and the centers of the medium inlet, medium outlet, movable iron core and coil assembly are on the same axis, making the solenoid valve structure more compact. At the same time, the resistance of the fluid passing through will be reduced, so the pressure drop is also reduced at the same time.

[0046] In some embodiments, Figure 1 and Figure 2 As shown, the valve port sealing assembly 2 also includes a sealing member base 23 placed in the installation cavity 102, and a plurality of arc-shaped through holes 231 for medium to pass through are arranged in an annular manner at equal intervals on the sealing member base 23, and the sealing member 21 is fixed on the sealing member base 23. Among them, the sealing member is made of high-pressure resistant rubber material, and is inlaid with an iron support member to alleviate the deformation of the rubber material under high pressure, and can withstand higher pressure while providing effective sealing, thereby effectively improving the pressure resistance performance of the solenoid valve.

[0047] In some embodiments, Figure 1 and Figure 3As shown, the valve core sealing assembly 5 includes a base 51 abutting on the valve body 1 and an end cover 52 abutting on the coil skeleton 31, and a pan seal 53 is installed between the base 51 and the end cover 52, and the pan seal 53 abuts on the outer wall of the movable iron core 4. The pan seal is made of modified PTFE and SS316 stainless steel spring, and is V-shaped. The use pressure is above 40MPa. The higher the use pressure, the better the sealing performance, and no leakage will occur. The base 51 is provided with a limiting flange 511 toward the valve port sealing assembly 2, and the limiting flange 511 abuts on the valve port sealing assembly 2. The valve port sealing assembly 2 is limitedly installed in the installation cavity 102 by the limiting flange 511. A first sealing ring 54 is installed between the base 51 and the valve body 1, a second sealing ring 55 is installed between the end cover 52 and the base 51, and a third sealing ring 56 is installed between the end cover 52 and the coil skeleton 31. The three sealing rings cooperate to ensure sealing performance and prevent leakage.

[0048] In this structure, when the solenoid valve is closed, the installation cavity and the inner cavity of the coil frame are separated by the valve core sealing assembly. The greater the pressure passing through the two ends of the solenoid valve, the better the sealing performance. The medium entering the medium inlet directly passes through the movable iron core along the axial direction to reach the valve port. When the coil is not energized, the valve port is pushed against the seal by the pressure of the spring and the medium. At this time, the greater the pressure of the medium, the tighter the valve port is closed and the better the sealing performance.

[0049] In some embodiments, Figure 4 and Figure 5 As shown, the end of the movable iron core 4 facing the valve port sealing assembly 2 is provided with a first contraction portion 403, and the valve core sealing assembly 5 is sleeved on the first contraction portion 403; the valve port 401 is provided at the end of the first contraction portion 403, the outer side of the valve port 401 is provided with a first chamfer 404, and the inner side thereof is provided with a second chamfer 405, and a valve port sealing surface 406 for sealing with the sealing member 21 is formed between the second chamfer 405 and the first chamfer 404. The inner and outer chamfers at the valve port are as large as possible, so that the electromagnetic force required to open the solenoid valve is small, thereby achieving a higher opening pressure. This structure can effectively seal while also reducing the electromagnetic force required to open the solenoid valve, thereby increasing the working pressure of the solenoid valve.

[0050] In some embodiments, Figure 1 and Figure 4As shown, a spring 6 is installed between the movable iron core 4 and the coil skeleton 31, and the spring 6 always makes the movable iron core 4 tend to move toward the sealing member 21; a spring flange 407 is protruding outward from the movable iron core 4, one end of the spring 6 abuts against the coil skeleton 31, and the other end abuts against the spring flange 407; when the valve is closed, the distance between the lower end of the spring flange 407 and the valve core sealing assembly 5 is 0.5 mm, which ensures effective sealing while preventing the valve port from sinking too deeply into the sealing member, and can effectively protect the sealing member, thereby greatly improving the service life of the solenoid valve.

[0051] In some embodiments, Figure 1 and Figure 4 As shown, an annular mounting groove 408 is provided at one end of the movable iron core 4 away from the valve port sealing assembly 2, and a guide ring 41 is installed in the annular mounting groove 408, and the guide ring 41 is in sliding contact with the inner wall of the coil frame 31. The wear resistance and lubricity of the guide ring can not only ensure the reliability of the moving process of the movable iron core, but also allow the movable iron core to move on the same axis as much as possible, providing a guarantee for reliable sealing.

[0052] In some embodiments, Figure 1 and Figure 4 As shown, a through hole 409 is radially arranged in the movable iron core 4, the through hole 409 is connected to the second medium channel 402, and the through hole 409 is located on the upper side of the valve core sealing assembly 5. The medium outlet 101 and the medium inlet 3131 are both provided with internal threads for convenient connection with external pipelines.

[0053] In some embodiments, Figure 1 , Figure 6 and Figure 7 As shown, the coil skeleton 31 includes a magnetic isolation tube seat 311, a magnetic isolation tube 312 and a static iron core 313 which are fixedly connected from bottom to top in sequence, and the magnetic isolation tube seat 311 is threadedly connected to the valve body 1; the lower end of the static iron core 313 is provided with an attraction surface 3133, and the attraction surface 3133 extends into the magnetic isolation tube 312, and the medium inlet 3131 and the first medium channel 3132 are axially arranged in the static iron core 313; the static iron core 313 is provided with an annular protrusion 3134, and an annular winding portion 314 is formed between the annular protrusion 3134 and the magnetic isolation tube seat 311; the annular winding portion 314 is coated with an insulating coating, and the annular winding portion 314 is wound with an enameled wire 32. Among them, the insulating coating is a prior art and will not be repeated in this embodiment.

[0054] In this structure, the coil skeleton composed of the static iron core, the magnetic isolation tube and the magnetic isolation tube seat of the solenoid valve is treated with an insulating coating, which can not only withstand high-voltage breakdown, but also withstand high-pressure media; the surface of the coil skeleton has an insulating coating, so that the inner hole of the coil skeleton becomes a magnetic isolation tube in the traditional sense of the solenoid valve. This structure actually eliminates the magnetic isolation tube and becomes simpler in structure; in addition, the distance between the movable iron core and the enameled wire is closer, and the air gap between the magnetic isolation tube and the enameled wire is eliminated. In actual work, the beneficial electromagnetic force generated by the coil will be greatly increased, which is suitable for high-pressure media.

[0055] In some embodiments, Figure 7 As shown, the lower end of the static iron core 313 is provided with a second contraction portion 3135, and the upper end of the magnetic isolation tube 312 is covered on the second contraction portion 3135; the lower end of the magnetic isolation tube 312 is provided with a step plug-in portion 3121, and the magnetic isolation tube seat 311 is provided with a step slot 3111 adapted to the step plug-in portion 3121; the magnetic isolation tube seat 311, the magnetic isolation tube 312 and the static iron core 313 are coaxially arranged and fixed in sequence by laser welding. This structure is fixed as a whole by welding, and the structure is stable and reliable, and has good pressure resistance.

[0056] In some embodiments, Figure 1 and Figure 7 As shown, the suction surface 3133 is located at one-third of the height of the annular winding portion 314; a magnetic isolation ring 33 is fixed on the suction surface 3133. The suction surface is located at one-third of the height of the annular winding portion. It is found through practice that this position can obtain the maximum electromagnetic force, thereby increasing the opening pressure of the solenoid valve; the direct-acting structure and the application of the magnetic isolation ring make the solenoid valve have a faster response time, which can meet the demand for rapid switching of the solenoid valve.

[0057] In some embodiments, Figure 6 and Figure 7 As shown, the annular protrusion 3134 is provided with a threading hole 3136, and a lead 321 is passed through the threading hole 3136, and the lead 321 is electrically connected to the two ends of the enameled wire 32 respectively; a plastic film 34 is provided on the outside of the enameled wire 32; a cover 35 is threadedly connected to the magnetic isolation tube seat 311, and the cover 35 is covered on the outside of the coil frame 31 and the enameled wire 32. The outer layer of the enameled wire is plastic-sealed, and the lead-type structure is added, so that the protection level can reach a higher level.

[0058] The same and similar parts between the various embodiments in this specification can be referenced to each other, and each embodiment focuses on the differences from other embodiments.

[0059] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A direct-acting high-pressure solenoid valve, characterized in that: include: A valve body (1) is provided with a medium outlet (101) and a mounting cavity (102) which are communicated with each other; A valve port sealing assembly (2) is installed in a limited position in the installation cavity (102), comprising a sealing member (21) and a supporting member (22) embedded in the sealing member (21); The coil assembly (3) comprises a coil skeleton (31) threadedly connected to the valve body (1); the coil skeleton (31) is provided with a medium inlet (3131) and a first medium channel (3132) which are interconnected; A movable iron core (4) is mounted in the coil frame (31) in a vertically sliding manner; a valve port (401) is provided at one end of the movable iron core (4) facing the valve port sealing assembly (2), and the valve port (401) can be pressed against the sealing member (21) to close the valve; and a second medium channel (402) is axially provided on the movable iron core (4) for connecting the valve port (401) and the first medium channel (3132); A valve core sealing assembly (5) is installed between the valve body (1) and the coil frame (31) in a limited manner and is sleeved on the movable iron core (4); the valve core sealing assembly (5) comprises a base (51) abutting against the valve body (1) and an end cover (52) abutting against the coil frame (31), a pan-seal (53) is installed between the base (51) and the end cover (52), and the pan-seal (53) abuts against the outer wall of the movable iron core (4).

2. The direct-acting high-pressure solenoid valve according to claim 1, characterized in that: The valve port sealing assembly (2) further comprises a sealing member base (23) disposed in the mounting cavity (102), wherein a plurality of arc-shaped through holes (231) for medium to pass through are arranged at equal intervals in an annular manner on the sealing member base (23), and the sealing member (21) is fixed on the sealing member base (23).

3. The direct-acting high-pressure solenoid valve according to claim 1, characterized in that: The base (51) is provided with a limiting flange (511) facing the valve port sealing assembly (2), and the limiting flange (511) is abutted against the valve port sealing assembly (2); a first sealing ring (54) is installed between the base (51) and the valve body (1), a second sealing ring (55) is installed between the end cover (52) and the base (51), and a third sealing ring (56) is installed between the end cover (52) and the coil frame (31).

4. The direct-acting high-pressure solenoid valve according to claim 1, characterized in that: A first contraction portion (403) is provided at one end of the movable iron core (4) facing the valve port sealing assembly (2), and the valve core sealing assembly (5) is sleeved on the first contraction portion (403); the valve port (401) is provided at the end of the first contraction portion (403), and a first chamfer (404) is provided on the outer side of the valve port (401), and a second chamfer (405) is provided on the inner side thereof, and a valve port sealing surface (406) for fitting and sealing with the sealing member (21) is formed between the second chamfer (405) and the first chamfer (404).

5. The direct-acting high-pressure solenoid valve according to claim 1, characterized in that: A spring (6) is installed between the movable iron core (4) and the coil frame (31), and the spring (6) always makes the movable iron core (4) tend to move toward the sealing member (21); a spring flange (407) is provided on the movable iron core (4) protruding outward, one end of the spring (6) abuts against the coil frame (31), and the other end abuts against the spring flange (407); when the valve is closed, the distance between the lower end of the spring flange (407) and the valve core sealing assembly (5) is 0.5 mm; An annular mounting groove (408) is provided at one end of the movable iron core (4) away from the valve port sealing assembly (2), a guide ring (41) is installed in the annular mounting groove (408), and the guide ring (41) is in sliding contact with the inner wall of the coil frame (31); A through hole (409) is radially arranged inside the movable iron core (4), the through hole (409) is connected to the second medium channel (402), and the through hole (409) is located on the upper side of the valve core sealing assembly (5).

6. The direct-acting high-pressure solenoid valve according to claim 1, characterized in that: The coil skeleton (31) comprises a magnetic isolation tube seat (311), a magnetic isolation tube (312) and a static iron core (313) which are fixedly connected in sequence from bottom to top, the magnetic isolation tube seat (311) being threadedly connected to the valve body (1); the lower end of the static iron core (313) is provided with an attraction surface (3133), the attraction surface (3133) extends into the magnetic isolation tube (312), the medium inlet (3131) and the first medium channel (3132) are axially arranged in the static iron core (313); the static iron core (313) is provided with an annular protrusion (3134), and an annular winding portion (314) is formed between the annular protrusion (3134) and the magnetic isolation tube seat (311); the annular winding portion (314) is coated with an insulating coating, and the annular winding portion (314) is wound with an enameled wire (32).

7. The direct-acting high-pressure solenoid valve according to claim 6, characterized in that: The lower end of the static iron core (313) is provided with a second contraction portion (3135), and the upper end of the magnetic isolation tube (312) is sleeved on the second contraction portion (3135); the lower end of the magnetic isolation tube (312) is provided with a stepped plug-in portion (3121), and the magnetic isolation tube seat (311) is provided with a stepped slot (3111) adapted to the stepped plug-in portion (3121); the magnetic isolation tube seat (311), the magnetic isolation tube (312) and the static iron core (313) are coaxially arranged and fixed in sequence by laser welding.

8. The direct-acting high-pressure solenoid valve according to claim 6, characterized in that: The suction surface (3133) is located at one third of the height of the annular winding portion (314); a magnetic isolation ring (33) is fixed on the suction surface (3133); The annular protrusion (3134) is provided with a threading hole (3136), and a lead wire (321) is passed through the threading hole (3136), and the lead wire (321) is electrically connected to the two ends of the enameled wire (32) respectively; a plastic film (34) is provided on the outer side of the enameled wire (32); A cover shell (35) is threadedly connected to the magnetic isolation tube seat (311), and the cover shell (35) is arranged to cover the outer side of the coil frame (31) and the enameled wire (32).

9. The direct-acting high-pressure solenoid valve according to claim 1, characterized in that: The valve body (1), the valve port sealing assembly (2), the coil assembly (3), the movable iron core (4) and the valve core sealing assembly (5) are located on the same axis, and the medium outlet (101), the valve port (401), the second medium channel (402), the first medium channel (3132) and the medium inlet (3131) are located on the same axis.

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