Valve element structure of direct-acting high-pressure axial electromagnetic valve

Abstract

The utility model provides a valve core structure of a direct-acting high-pressure axial electromagnetic valve, which comprises a valve body, a valve port sealing assembly and a movable iron core, and the valve body is provided with a medium outlet and a mounting cavity which are communicated with each other; the valve port sealing assembly comprises a sealing piece base installed in the installation cavity in a limited mode, a sealing piece fixed to the sealing piece base and a supporting piece embedded in the sealing piece, the supporting piece is used for supporting the sealing piece, and a plurality of arc-shaped through holes allowing media to pass through are annularly formed in the sealing piece base at equal intervals. The movable iron core is installed on the upper side of the valve port sealing assembly in a sliding mode in the vertical direction, a valve port is formed in the end, facing the valve port sealing assembly, of the movable iron core, and the valve port can abut against the sealing piece so that the valve can be closed. According to the valve element structure of the direct-acting high-pressure axial electromagnetic valve, the defect that an existing high-pressure electromagnetic valve is poor in pressure resistance is overcome.

Description

Technical Field

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

[0002] For the high-pressure solenoid valves in the prior art, the direct-acting structure is adopted for small-diameter passages, generally with a flow diameter less than 3.0 mm, which cannot meet the demand for large flow rates; the pilot-operated structure is adopted for large-diameter passages, and the valve is opened and closed by using the pressure difference. However, this structure has a slow response time and a complex structure, and cannot meet the requirements of quickly opening and closing the valve. Moreover, the design of conventional solenoid valves is low-in and high-out, and the flow rate will be about 1 / 3 smaller than the normal value. High-pressure solenoid valves are generally applicable to high-pressure media. Due to the high medium pressure, it is easy to cause the sealing performance of the solenoid valve to decline, the solenoid valve is prone to failure, and the pressure resistance is poor. Summary of the Utility Model

[0003] (I) Technical Problems to be Solved

[0004] The problem to be solved by the utility model is to provide a spool structure of a direct-acting high-pressure axial solenoid valve to overcome the defect of poor pressure resistance of the existing high-pressure solenoid valves.

[0005] (II) Technical Solutions

[0006] To solve the above technical problems, the utility model provides a spool structure of a direct-acting high-pressure axial solenoid valve, including:

[0007] A valve body, on which a medium outlet and an installation cavity are provided and communicated with each other;

[0008] A valve port sealing assembly, including a seal base limitedly installed in the installation cavity, a seal fixed on the seal base, and a support member embedded in the seal. The support member is used to support the seal, and a plurality of arc-shaped through holes for the medium to pass through are annularly and equally spaced on the seal base;

[0009] A movable iron core, slidably installed vertically above the valve port sealing assembly; 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 seal to close the valve.

[0010] In some embodiments, a coil bobbin is threadedly connected to the valve body, and the movable iron core is slidably installed in the inner cavity of the coil bobbin; a spool sealing assembly is limitedly installed between the valve body and the coil bobbin, and the spool sealing assembly is sleeved on the movable iron core. The spool sealing assembly includes a base abutted against the valve body and an end cap abutted against the coil bobbin. A lip seal is installed between the base and the end cap, and the lip seal abuts against the outer wall of the movable iron core.

[0011] In some embodiments, the base is abutted against the upper end of the seal base; 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 skeleton.

[0012] In some embodiments, a contraction part is arranged at one end of the movable iron core facing the valve port sealing assembly; the valve core sealing assembly is sleeved on the contraction part; the valve port is arranged at the end of the contraction part, a first chamfer is arranged on the outer side of the valve port, a second chamfer is arranged 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.

[0013] In some embodiments, a spring is installed between the movable iron core and the coil skeleton, and the spring always makes the movable iron core tend to move towards the seal base; a spring flange protrudes outwardly on the movable iron core, one end of the spring abuts against the coil skeleton, and the other end abuts against the spring flange.

[0014] In some embodiments, an annular installation groove is arranged at one end of the movable iron core away from the valve port sealing assembly, and a guide ring is installed in the annular installation groove, and the guide ring is in sliding contact with the inner wall of the coil skeleton.

[0015] In some embodiments, a first medium channel is arranged axially in the movable iron core, and the valve port communicates with the first medium channel; a through hole is arranged radially in the movable iron core, the through hole communicates with the first medium channel, and the through hole is located above the valve core sealing assembly. A medium inlet and a second medium channel that communicate with each other are arranged on the coil skeleton, the first medium channel communicates with the second medium channel, and internal threads are arranged in both the medium inlet and the medium outlet.

[0016] In some embodiments, the medium outlet, the valve port sealing assembly, the movable iron core, the valve core sealing assembly and the medium inlet are all located on the same axis.

[0017] (III) Beneficial effects

[0018] The spool structure of a direct-acting high-pressure axial solenoid valve provided by the present utility model has the following advantages compared with the prior art:

[0019] 1) A ferrous support member is inlaid in the middle of the valve port sealing assembly. The support member can support the seal, can withstand higher pressure while providing effective sealing, and effectively improves the pressure resistance performance of the solenoid valve;

[0020] 2) When the solenoid valve is closed, the installation cavity and the inner cavity of the coil bobbin are separated by the valve core sealing assembly. The greater the pressure at both ends of the solenoid valve, the better the sealing performance. The medium entering from the medium inlet directly passes through the movable iron core along the axis to reach the valve port. When the coil is not energized, the valve port is pushed by the spring and the pressure of the medium against the seal. At this time, the greater the pressure of the medium, the tighter the valve port closes, with good sealing performance and reliable opening and closing.

[0021] 3) The valve port is provided with a first chamfer and a second chamfer. The first chamfer and the second chamfer reduce the sealing surface of the valve port. While effectively sealing, it also reduces the electromagnetic force required for the solenoid valve to open, thereby increasing the working pressure of the solenoid valve.

[0022] 4) The wear-resistant lubricity of the guide ring can not only ensure the reliability of the movement process of the movable iron core, but also enable the movable iron core to move as much as possible on the same axis, providing a guarantee for reliable sealing.

[0023] 5) The centers of the medium inlet, the medium outlet, the movable iron core, the valve port sealing assembly, and the valve core sealing assembly are located on the same axis. The axial design makes the structure of the solenoid valve more compact. At the same time, the resistance when the fluid passes through is reduced, so the pressure drop is also reduced, meeting the flow requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] 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 in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0025] Figure 1 is a schematic structural diagram of the valve core structure of a direct-acting high-pressure axial solenoid valve of the present utility model;

[0026] Figure 2 is a schematic structural diagram of the valve port sealing assembly of the valve core structure of a direct-acting high-pressure axial solenoid valve of the present utility model;

[0027] Figure 3 is a schematic structural diagram of the valve core sealing assembly of the valve core structure of a direct-acting high-pressure axial solenoid valve of the present utility model;

[0028] Figure 4 is a schematic structural diagram of the movable iron core of the valve core structure of a direct-acting high-pressure axial solenoid valve of the present utility model;

[0029] Figure 5 is Figure 4 the enlarged view of part A of;

[0030] Figure 6This is a schematic structural diagram of the coil skeleton of the spool structure of a direct-acting high-pressure axial solenoid valve of the present utility model;

[0031] The corresponding component names for the various reference numerals in the figure are: 1. Valve body; 101. Medium outlet; 102. Installation cavity; 2. Valve port sealing assembly; 21. Sealing member base; 22. Sealing member; 23. Support member; 211. Arc-shaped through hole; 3. Moving iron core; 31. Guide ring; 301. Valve port; 302. Contraction part; 303. First chamfer; 304. Second chamfer; 305. Valve port sealing surface; 306. Spring flange; 307. Annular installation groove; 308. First medium channel; 309. Through hole; 4. Coil skeleton; 401. Medium inlet; 402. Second medium channel; 5. Spool sealing assembly; 51. Base; 52. End cover; 53. V-packing; 54. First sealing ring; 55. Second sealing ring; 56. Third sealing ring; 6. Spring; 7. Electromagnetic coil. Specific embodiments

[0032] The following describes the present application in detail with reference to the accompanying drawings and specific embodiments.

[0033] The following illustrates the embodiments of the present application through specific specific examples. Those skilled in the art can easily understand other advantages and effects of the present application from the content 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 embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that, without conflict, the following embodiments and the features in the embodiments can be combined with each other. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts belong to the scope of protection of the present application.

[0034] It should be noted that the following describes various aspects of the embodiments within the scope of the appended claims. It should be obvious that the aspects described herein can be embodied in a wide variety of forms, and any specific structure and / or function described herein is illustrative only. Based on the present application, those skilled in the art should understand that one 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 aspects described herein can be used to implement the device and / or practice the method. In addition, this device and / or this method can be implemented using other structures and / or functions in addition to one or more of the aspects described herein.

[0035] It should also be noted that the illustrations provided in the following embodiments only schematically illustrate the basic concept of the present application. The components shown in the drawings are only those related to the present application, rather than being drawn according to the number, shape, and size of the components in actual implementation. The type, quantity, and ratio of each component in actual implementation can be arbitrarily changed, and the component layout type may also be more complex.

[0036] In addition, in the following description, specific details are provided to facilitate a thorough understanding of the examples. However, those skilled in the art will understand that the examples can be practiced without these specific details.

[0037] The following describes the technical solutions provided by each embodiment of the present application with reference to the accompanying drawings.

[0038] Refer to Figures 1 to 6 , the present utility model provides a spool structure of a direct-acting high-pressure axial solenoid valve, including a valve body 1, a valve port sealing assembly 2, and a moving iron core 3.

[0039] Refer to Figure 1 , a medium outlet 101 and an installation cavity 102 that communicate with each other are provided on the valve body 1. The medium outlet 101 and the installation cavity 102 are both located on the center line of the valve body 1. An internal thread is provided in the medium outlet 101 to facilitate threaded connection with an external pipeline.

[0040] Refer to Figure 1 and Figure 2 , the valve port sealing assembly 2 includes a seal base 21 that is limitedly installed in the installation cavity 102, a seal 22 fixed on the seal base 21, and a support member 23 embedded in the seal 22. The support member 23 is used to support the seal 22. A plurality of arc-shaped through holes 211 for the medium to pass through are annularly and equally spaced on the seal base 21. Among them, the seal 22 is made of high-pressure resistant rubber material, and an iron support member 23 is embedded inside to relieve the deformation degree of the rubber material under high pressure, and can withstand higher pressure while providing effective sealing, effectively improving the pressure resistance performance of the solenoid valve.

[0041] Refer to Figure 1 , the moving iron core 3 is slidably installed vertically above the valve port sealing assembly 2; one end of the moving iron core 3 facing the valve port sealing assembly 2 is provided with a valve port 301, and the valve port 301 can be abutted against the seal 22 to close the valve. When the valve is closed, the valve port 301 abuts against the seal 22; when the valve is opened, the valve port 301 is separated from the seal 22.

[0042] In some embodiments, such as Figure 1 and Figure 3As shown, a coil bobbin 4 is threadedly connected to the valve body 1, and a movable iron core 3 is slidably installed in the inner cavity of the coil bobbin 4; a valve core sealing assembly 5 is installed between the valve body 1 and the coil bobbin 4 in a limiting manner, and the valve core sealing assembly 5 is sleeved on the movable iron core 3. The valve core sealing assembly 5 separates the installation cavity 102 from the inner cavity of the coil bobbin 4. Among them, the coil bobbin 4 is a prior art and will not be elaborated in this embodiment; an electromagnetic coil 7 is sleeved on the outside of the coil bobbin 4.

[0043] In some embodiments, such as Figure 1 and Figure 3 As shown, the valve core sealing assembly 5 includes a base 51 abutted against the valve body 1 and an end cap 52 abutted against the coil bobbin 4. A pantograph seal 53 is installed between the base 51 and the end cap 52. The base 51 and the end cap 52 cooperate to position and install the pantograph seal 53, and the pantograph seal 53 abuts against the outer wall of the movable iron core 3. The material of the pantograph seal is modified PTFE and SS316 stainless steel shrapnel, in a V shape, with a service pressure above 40 MPa. The higher the service pressure, the better the sealing performance and no leakage will occur. The base 51 abuts against the upper end of the seal base 21; 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 cap 52 and the base 51, and a third sealing ring 56 is installed between the end cap 52 and the coil bobbin 4. Through the cooperation of the three sealing rings, the sealing performance is ensured and leakage is prevented.

[0044] In some embodiments, such as Figure 1 、 Figure 4 and Figure 5 As shown, one end of the movable iron core 3 facing the valve port sealing assembly 2 is provided with a contraction part 302, and the valve core sealing assembly 5 is sleeved on the contraction part 302; the valve port 301 is arranged at the end of the contraction part 302. A first chamfer 303 is arranged on the outside of the valve port 301, and a second chamfer 304 is arranged on the inside thereof. A valve port sealing surface 305 for fitting and sealing with the seal 22 is formed between the second chamfer 304 and the first chamfer 303. 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, and thus a higher opening pressure can be achieved.

[0045] In some embodiments, such as Figure 1 and Figure 4 As shown, a spring 6 is installed between the movable iron core 3 and the coil bobbin 4, and the spring 6 always makes the movable iron core 3 tend to move towards the seal base 21; a spring flange 306 protrudes outwardly on the movable iron core 3. One end of the spring 6 abuts against the coil bobbin 4, and the other end abuts against the spring flange 306. When the solenoid valve is closed, the distance between the lower end of the spring flange 306 and the upper end of the end cap 52 is 0.5 mm. This distance can ensure effective sealing while preventing the valve port from sinking too deep into the seal, effectively protecting the seal, and thus greatly improving the service life of the solenoid valve.

[0046] In some embodiments, as Figure 1 and Figure 4 shown, at one end of the movable iron core 3 away from the valve port sealing assembly 2, an annular mounting groove 307 is provided. A guide ring 31 is mounted in the annular mounting groove 307, and the guide ring 31 is in sliding contact with the inner wall of the coil bobbin 4. The wear resistance and lubricity of the guide ring can not only ensure the reliability of the movement process of the movable iron core, but also enable the movable iron core to move on the same axis as much as possible, providing a guarantee for reliable sealing.

[0047] In some embodiments, as Figure 1 , Figure 4 and Figure 6 shown, a first medium channel 308 is axially provided in the movable iron core 3, and the valve port 301 communicates with the first medium channel 308; a through hole 309 is radially provided in the movable iron core 3, and the through hole 309 communicates with the first medium channel 308. The through hole 309 is located above the valve core sealing assembly 5. A medium inlet 401 and a second medium channel 402 that communicate with each other are provided on the coil bobbin 4. The first medium channel 308 communicates with the second medium channel 402, and an internal thread is provided in the medium inlet 401 for convenient connection with a pipeline. The medium entering from the medium inlet directly reaches the valve port along the axis through the movable iron core. 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 closes, with good sealing performance and reliable opening and closing.

[0048] In some embodiments, as Figure 1 shown, the medium outlet 101, the valve port sealing assembly 2, the movable iron core 3, the valve core sealing assembly 5, and the medium inlet 401 are all located on the same axis. The axial design makes the structure of the solenoid valve more compact. At the same time, the resistance when the fluid passes through will be reduced, so the pressure drop is also reduced simultaneously, meeting the flow demand.

[0049] For the same and similar parts among the various embodiments in this specification, reference can be made to each other. Each embodiment focuses on the differences from other embodiments.

[0050] The above is only the specific implementation manner 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 those skilled in the art within the technical scope disclosed in the present application should be covered by the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A valve core structure of a direct-acting high-pressure axial 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), comprising a sealing member base (21) limitedly mounted in the mounting cavity (102), a sealing member (22) fixed on the sealing member base (21), and a supporting member (23) embedded in the sealing member (22), wherein the supporting member (23) is used to support the sealing member (22), and a plurality of arc-shaped through holes (211) for medium to pass through are arranged at equal intervals in an annular manner on the sealing member base (21); A movable iron core (3) is mounted on the upper side of the valve port sealing assembly (2) in a vertically sliding manner; a valve port (301) is provided at one end of the movable iron core (3) facing the valve port sealing assembly (2), and the valve port (301) can be pressed against the sealing member (22) to close the valve.

2. The valve core structure of the direct-acting high-pressure axial solenoid valve according to claim 1, characterized in that: The valve body (1) is threadedly connected to a coil frame (4), and the movable iron core (3) is slidably installed in the inner cavity of the coil frame (4); a valve core sealing component (5) is limitedly installed between the valve body (1) and the coil frame (4), and the valve core sealing component (5) is sleeved on the movable iron core (3).

3. The valve core structure of the direct-acting high-pressure axial solenoid valve according to claim 2, characterized in that: 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 (4); a pan-seal (53) is installed between the base (51) and the end cover (52); the pan-seal (53) abuts against the outer wall of the movable iron core (3).

4. The valve core structure of the direct-acting high-pressure axial solenoid valve according to claim 3 is characterized in that: The base (51) is placed against the upper end of the sealing member base (21); 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 (4).

5. The valve core structure of the direct-acting high-pressure axial solenoid valve according to claim 2, characterized in that: A contraction portion (302) is provided at one end of the movable iron core (3) facing the valve port sealing assembly (2), and the valve core sealing assembly (5) is sleeved on the contraction portion (302); the valve port (301) is provided at the end of the contraction portion (302), a first chamfer (303) is provided on the outer side of the valve port (301), and a second chamfer (304) is provided on the inner side thereof, and a valve port sealing surface (305) for fitting and sealing with the sealing member (22) is formed between the second chamfer (304) and the first chamfer (303).

6. The valve core structure of the direct-acting high-pressure axial solenoid valve according to claim 2, characterized in that: A spring (6) is installed between the movable iron core (3) and the coil frame (4), and the spring (6) always makes the movable iron core (3) tend to move toward the sealing base (21); a spring flange (306) is protruding outward from the movable iron core (3), one end of the spring (6) is against the coil frame (4), and the other end is against the spring flange (306).

7. The valve core structure of the direct-acting high-pressure axial solenoid valve according to claim 2, characterized in that: An annular mounting groove (307) is provided at one end of the movable iron core (3) away from the valve port sealing assembly (2), a guide ring (31) is installed in the annular mounting groove (307), and the guide ring (31) is in sliding contact with the inner wall of the coil frame (4).

8. The valve core structure of the direct-acting high-pressure axial solenoid valve according to claim 2, characterized in that: A first medium channel (308) is axially arranged in the movable iron core (3), and the valve port (301) is connected to the first medium channel (308); a through hole (309) is radially arranged in the movable iron core (3), and the through hole (309) is connected to the first medium channel (308), and the through hole (309) is located on the upper side of the valve core sealing assembly (5).

9. The valve core structure of the direct-acting high-pressure axial solenoid valve according to claim 8, characterized in that: The coil skeleton (4) is provided with a medium inlet (401) and a second medium channel (402) which are connected to each other, the first medium channel (308) is connected to the second medium channel (402), and the medium inlet (401) and the medium outlet (101) are both provided with internal threads.

10. The valve core structure of the direct-acting high-pressure axial solenoid valve according to claim 9, characterized in that: The medium outlet (101), the valve port sealing assembly (2), the movable iron core (3), the valve core sealing assembly (5) and the medium inlet (401) are all located on the same axis.

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