Electromagnetic coil of direct-acting high-pressure axial electromagnetic valve

Abstract

The utility model provides an electromagnetic coil of a direct-acting type high-pressure axial electromagnetic valve, which comprises a coil framework, the coil framework comprises a magnetism isolating tube seat, a magnetism isolating tube and a static iron core which are sequentially and fixedly connected from bottom to top, and the magnetism isolating tube seat is detachably connected with a valve body; the lower end of the static iron core is provided with an attraction surface, and the attraction surface extends into the magnetism isolating tube; the static iron core is provided with a medium inlet and a first medium channel which are communicated with each other, and the first medium channel is communicated with the magnetism isolating pipe; an annular protrusion is arranged on the static iron core, and an annular winding part is defined between the annular protrusion and the magnetism isolating tube base. An insulating coating is coated on the annular winding part, and an enameled wire is wound on the annular winding part; the electromagnetic coil of the direct-acting high-pressure axial electromagnetic valve overcomes the defect that an existing electromagnetic coil is not suitable for high-pressure media.

Description

Technical Field

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

[0002] For the existing high-pressure solenoid valves, the direct-acting structure is adopted for small flow diameters, 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 flow diameters, and the valve is opened and closed by using the pressure difference, but this structure has a slow response time and a complex structure, and cannot meet the requirement of quickly opening and closing the valve. Moreover, the design of conventional solenoid valves is all low-in and high-out, and the flow rate will be about 1 / 3 smaller than the normal value.

[0003] High-pressure solenoid valves are generally applicable to high-pressure media. Due to the relatively high medium pressure, the opening electromagnetic force is also large. Therefore, higher requirements are also put forward for the structure of the electromagnetic coil. The existing electromagnetic coil structure is relatively complex, the electromagnetic force is small, and the valve opening is unreliable, and it cannot be well applied to high-pressure media. Summary of the Utility Model

[0004] (I) Technical Problems to be Solved

[0005] The problem to be solved by the utility model is to provide an electromagnetic coil of a direct-acting high-pressure axial solenoid valve to overcome the defect that the existing electromagnetic coil is not applicable to high-pressure media.

[0006] (II) Technical Solutions

[0007] To solve the above technical problems, the utility model provides an electromagnetic coil of a direct-acting high-pressure axial solenoid valve, including a coil skeleton, the coil skeleton includes a magnetic isolation tube seat, a magnetic isolation tube and a static iron core which are fixedly connected in sequence from bottom to top, and the magnetic isolation tube seat is detachably connected to the valve body; a suction surface is arranged at the lower end of the static iron core, and the suction surface extends into the magnetic isolation tube; a medium inlet and a first medium channel which are communicated with each other are arranged on the static iron core, and the first medium channel is communicated with the magnetic isolation tube; a ring-shaped protrusion is arranged on the static iron core, and an annular winding part is formed between the ring-shaped protrusion and the magnetic isolation tube seat; an insulating coating is coated on the annular winding part, and an enameled wire is wound on the annular winding part.

[0008] In some embodiments, a contraction part is arranged at the lower end of the static iron core, and the upper end of the magnetic isolation tube is sleeved on the contraction part; a stepped insertion part is arranged at the lower end of the magnetic isolation tube, and a stepped slot adapted to the stepped insertion part is arranged on the magnetic isolation tube seat.

[0009] In some embodiments, the suction surface is located at one-third of the height of the annular winding part; a magnetic isolation ring is fixed on the suction surface.

[0010] In some embodiments, the magnetic isolation tube base, the magnetic isolation tube, and the static iron core are coaxially arranged and are sequentially fixed by laser welding.

[0011] In some embodiments, a wire passing hole is provided on the annular protrusion, a lead wire is passed through the wire passing hole, and the lead wire is electrically connected to both ends of the enameled wire; a plastic sealing film is arranged outside the enameled wire.

[0012] In some embodiments, the lower end of the magnetic isolation tube base is provided with an internal thread portion for threadedly connecting with the valve body; an external thread portion is arranged on the outer wall of the magnetic isolation tube base, and a cover shell is threadedly connected to the external thread portion, and the cover shell covers the outside of the coil skeleton and the enameled wire.

[0013] In some embodiments, a medium outlet and an installation cavity communicating with each other are provided on the valve body; a valve port sealing assembly is installed in the installation cavity; the valve port sealing assembly includes a sealing member base limitedly installed in the installation cavity, a sealing member fixed on the sealing member base, and a support member embedded in the sealing member, the support member is used for supporting the sealing member, and a plurality of arc-shaped through holes for the medium to pass through are annularly and equidistantly arranged on the sealing member base; a movable iron core is slidably installed vertically inside the coil skeleton, a valve port is arranged 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.

[0014] In some embodiments, a valve core sealing assembly is limitedly installed between the valve body and the magnetic isolation tube base, and the valve core sealing assembly is sleeved on the movable iron core; the valve core sealing assembly includes a base abutted against the valve body and an end cover abutted against the magnetic isolation tube base, and a pantograph seal is installed between the base and the end cover, and the pantograph seal abuts against the outer wall of the movable iron core.

[0015] In some embodiments, a second medium channel is axially arranged inside the movable iron core, and the valve port communicates with the second medium channel; a through hole is radially arranged inside the movable iron core, the through hole communicates with the second medium channel, and the through hole is located above the valve core sealing assembly.

[0016] (III) Beneficial effects

[0017] The electromagnetic coil of a direct-acting high-pressure axial solenoid valve provided by the present utility model has the following advantages compared with the prior art:

[0018] 1) The coil skeleton composed of a static iron core, a magnetic isolation tube, and a magnetic isolation tube seat is treated with an insulating coating, which can not only withstand high-voltage breakdown but also bear high-voltage media; the surface of the coil skeleton has an insulating coating, making the inner hole of the coil skeleton become the 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 moving 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 increase significantly, the valve opening is reliable, and it is applicable to high-voltage media;

[0019] 2) The outer layer of the enameled wire is plastic-sealed, and with the leaded structure, the protection level can reach higher; the medium inlet is set on the static iron core, making the overall solenoid valve more compact and simpler in structure;

[0020] 3) A magnetic isolation ring is set between the static iron core and the moving iron core, greatly improving the switching speed of the solenoid valve;

[0021] 4) It is applicable to a direct-acting high-pressure axial solenoid valve. The axial structure design makes it more compact in structure, requires less installation space, and at the same time has less pressure loss of the fluid. Description of the Drawings

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings required in the embodiments. 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 also be obtained based on these drawings.

[0023] Figure 1 It is a schematic structural diagram when the electromagnetic coil of a direct-acting high-pressure axial solenoid valve of the present utility model is applied;

[0024] Figure 2 It is a schematic structural diagram of the electromagnetic coil of a direct-acting high-pressure axial solenoid valve of the present utility model;

[0025] Figure 3 It is a schematic structural diagram of the coil skeleton of the electromagnetic coil of a direct-acting high-pressure axial solenoid valve of the present utility model;

[0026] Figure 4 It is a schematic structural diagram of the valve port sealing assembly of the electromagnetic coil of a direct-acting high-pressure axial solenoid valve of the present utility model;

[0027] Figure 5 It is a schematic structural diagram of the moving iron core of the electromagnetic coil of a direct-acting high-pressure axial solenoid valve of the present utility model;

[0028] Figure 6This is a schematic structural diagram of the electromagnetic coil spool sealing assembly of a direct-acting high-pressure axial solenoid valve of the present utility model;

[0029] The corresponding component names for each reference numeral in the figure are: 1, coil bobbin; 11, magnetic isolation tube seat; 12, magnetic isolation tube; 13, static iron core; 101, annular winding part; 111, stepped slot; 112, internal thread part; 113, external thread part; 121, stepped insertion part; 131, suction surface; 132, medium inlet; 133, first medium channel; 134, annular protrusion; 135, contraction part; 136, wire passing hole; 2, enameled wire; 21, lead wire; 3, magnetic isolation ring; 4, plastic sealing film; 5, housing; 6, valve body; 601, medium outlet; 602, installation cavity; 7, valve port sealing assembly; 71, seal base; 72, seal; 73, support; 711, arc-shaped through hole; 8, movable iron core; 801, valve port; 802, second medium channel; 803, through hole; 9, spool sealing assembly; 91, base; 92, end cover; 93, pantograph seal. Detailed implementation manners

[0030] The present application will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0031] The following illustrates the implementation manners 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 of the embodiments. The present application can also be implemented or applied through other different specific implementation manners. 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.

[0032] 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.

[0033] 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 only relate to those in the present application and are not 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.

[0034] 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.

[0035] The following will describe the technical solutions provided by each embodiment of the present application with reference to the accompanying drawings.

[0036] Refer to Figures 1 to 6 , the present utility model provides an electromagnetic coil of a direct-acting high-pressure axial solenoid valve, including a coil bobbin 1. The coil bobbin 1 includes a magnetic isolation tube base 11, a magnetic isolation tube 12, and a static iron core 13 fixedly connected in sequence from bottom to top. The magnetic isolation tube base 11 is detachably connected to the valve body 6. A suction surface 131 is provided at the lower end of the static iron core 13. The suction surface 131 is used to adsorb the moving iron core 8, and the suction surface 131 extends into the magnetic isolation tube 12. A medium inlet 132 and a first medium channel 133 communicating with each other are provided on the static iron core 13. The first medium channel 133 communicates with the magnetic isolation tube 12, and the magnetic isolation tube 12 communicates with the magnetic isolation tube base 11; the medium inlet is provided on the static iron core, making the solenoid valve more compact as a whole and simpler in structure. A circular protrusion 134 is provided on the static iron core 13. An annular winding portion 101 is formed between the circular protrusion 134 and the magnetic isolation tube base 11; an insulating coating is applied to the annular winding portion 101, and an enameled wire 2 is wound around the annular winding portion 101. Among them, the insulating coating is prior art and will not be elaborated in this embodiment.

[0037] For this solenoid valve, the coil bobbin composed of the static iron core, the magnetic isolation tube, and the magnetic isolation tube base is treated with an insulating coating, which can not only withstand high-voltage breakdown but also bear high-pressure media; the surface of the coil bobbin has an insulating coating, making the inner hole of the coil bobbin become the 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 moving 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 operation, the beneficial electromagnetic force generated by the coil will increase significantly, making it applicable to high-pressure media.

[0038] In some embodiments, such as Figure 3As shown, a contraction part 135 is provided at the lower end of the static iron core 13, and the attracting surface 131 is arranged at the bottom of the contraction part 135. The upper end of the magnetic isolation tube 12 is sleeved on the contraction part 135; a stepped insertion part 121 is provided at the lower end of the magnetic isolation tube 12, and a stepped slot 111 adapted to the stepped insertion part 121 is provided on the magnetic isolation tube seat 11. The magnetic isolation tube seat 11, the magnetic isolation tube 12 and the static iron core 13 are coaxially arranged and are sequentially fixed by laser welding. In this way, they are fixed into one body by welding, with a stable and reliable structure and good pressure resistance.

[0039] In some embodiments, as Figure 1 and Figure 3 shown, the attracting surface 131 is located at one-third of the height H of the annular winding part 101; a magnetic isolation ring 3 is fixed on the attracting surface 131. The attracting surface 131 is located at one-third of the height of the annular winding part 101. Through practice, it is obtained that the maximum electromagnetic force can be obtained at this position, thereby increasing the opening pressure of the solenoid valve; the adoption of a direct-acting structure and the application of the magnetic isolation ring 3 enable the solenoid valve to have a faster response time and can meet the requirement for the quick opening and closing of the solenoid valve.

[0040] In some embodiments, as Figures 1 to 3 shown, a wire passing hole 136 is provided on the annular protrusion 134, and a lead wire 21 passes through the wire passing hole 136. The lead wire 21 is electrically connected to both ends of the enameled wire 2; a plastic sealing film 4 is arranged outside the enameled wire 2. The outer layer of the enameled wire is plastic-sealed, and with the lead wire structure, the protection level can be higher.

[0041] In some embodiments, as Figure 1 and Figure 3 shown, an internal thread part 112 for threaded connection with the valve body 6 is provided at the lower end of the magnetic isolation tube seat 11, which is convenient for disassembly and assembly. An external thread part 113 is provided on the outer wall of the magnetic isolation tube seat 11, and a cover shell 5 is threadedly connected to the external thread part 113. The cover shell 5 covers the outside of the coil skeleton 1 and the enameled wire 2.

[0042] In some embodiments, as Figure 1 、 Figure 4 and Figure 5As shown, a medium outlet 601 and an installation cavity 602 which are in communication with each other are provided on a valve body 6, and a valve port sealing assembly 7 is installed in the installation cavity 602; the valve port sealing assembly 7 includes a seal base 71 which is limitedly installed in the installation cavity 602, a seal 72 fixed on the seal base 71, and a support member 73 embedded in the seal 72. The support member 73 is used to support the seal 72. A plurality of arc-shaped through holes 711 for the medium to pass through are arranged at equal intervals in a ring shape on the seal base 71; a movable iron core 8 is slidably installed vertically in a coil bobbin 1. One end of the movable iron core 8 facing the valve port sealing assembly 7 is provided with a valve port 801. The valve port 801 can be abutted against the seal 72 to close the valve, and the valve opens when the valve port 801 is separated from the seal 72.

[0043] As Figure 1 and Figure 6 shown, a valve core sealing assembly 9 is limitedly installed between the valve body 6 and the magnetic isolation tube seat 11. The valve core sealing assembly 9 is sleeved on the movable iron core 8; the valve core sealing assembly 9 includes a base 91 abutted against the valve body 6 and an end cap 92 abutted against the magnetic isolation tube seat 11. A pantograph seal 93 is installed between the base 91 and the end cap 92, and the pantograph seal 93 abuts against the outer wall of the movable iron core 8.

[0044] As Figure 1 and Figure 5 shown, a second medium channel 802 is arranged axially in the movable iron core 8. The valve port 801 communicates with the second medium channel 802, and the second medium channel 802 is in communication; a through hole 803 is arranged radially in the movable iron core 8. The through hole 803 communicates with the first medium channel 133 through the second medium channel 802. The through hole 803 is located above the valve core sealing assembly 9.

[0045] 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.

[0046] As mentioned above, 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. The electromagnetic coil of a direct-acting high-pressure axial solenoid valve, comprising a coil bobbin (1), characterized in that: The coil bobbin (1) includes a magnetic isolation tube base (11), a magnetic isolation tube (12), and a static iron core (13) fixedly connected in sequence from bottom to top. The magnetic isolation tube base (11) is detachably connected to the valve body (6); a suction surface (131) is provided at the lower end of the static iron core (13), and the suction surface (131) extends into the magnetic isolation tube (12); a medium inlet (132) and a first medium channel (133) that communicate with each other are provided on the static iron core (13), and the first medium channel (133) communicates with the magnetic isolation tube (12); a ring-shaped protrusion (134) is provided on the static iron core (13), and an annular winding portion (101) is formed between the ring-shaped protrusion (134) and the magnetic isolation tube base (11); an insulating coating is applied to the annular winding portion (101), and an enameled wire (2) is wound around the annular winding portion (101).

2. The electromagnetic coil of the direct-acting high-pressure axial solenoid valve according to claim 1, characterized in that: A contraction portion (135) is provided at the lower end of the static iron core (13), and the upper end of the magnetic isolation tube (12) is sleeved on the contraction portion (135); a stepped insertion portion (121) is provided at the lower end of the magnetic isolation tube (12), and a stepped slot (111) adapted to the stepped insertion portion (121) is provided on the magnetic isolation tube base (11).

3. The electromagnetic coil of the direct-acting high-pressure axial solenoid valve according to claim 1, characterized in that: The suction surface (131) is located at one-third of the height of the annular winding portion (101).

4. The electromagnetic coil of the direct-acting high-pressure axial solenoid valve according to claim 1, characterized in that: A magnetic isolation ring (3) is fixed on the suction surface (131).

5. The electromagnetic coil of the direct-acting high-pressure axial solenoid valve according to claim 1, characterized in that: The magnetic isolation tube base (11), the magnetic isolation tube (12), and the static iron core (13) are coaxially arranged and are sequentially fixed by laser welding.

6. The electromagnetic coil of the direct-acting high-pressure axial solenoid valve according to claim 1, characterized in that: A wire passing hole (136) is provided on the ring-shaped protrusion (134), a lead wire (21) is passed through the wire passing hole (136), and the lead wire (21) is electrically connected to both ends of the enameled wire (2); a plastic sealing film (4) is provided outside the enameled wire (2).

7. The electromagnetic coil of the direct-acting high-pressure axial solenoid valve according to claim 1, characterized in that: An internal thread portion (112) for threaded connection with the valve body (6) is provided at the lower end of the magnetic isolation tube base (11); an external thread portion (113) is provided on the outer wall of the magnetic isolation tube base (11), and a cover shell (5) is threadedly connected to the external thread portion (113), and the cover shell (5) covers the outside of the coil bobbin (1) and the enameled wire (2).

8. The electromagnetic coil of the direct-acting high-pressure axial solenoid valve according to claim 1, characterized in that: A medium outlet (601) and an installation cavity (602) that communicate with each other are provided on the valve body (6), and a valve port sealing assembly (7) is installed in the installation cavity (602); the valve port sealing assembly (7) includes a sealing member base (71) that is limitedly installed in the installation cavity (602), a sealing member (72) fixed on the sealing member base (71), and a support member (73) embedded in the sealing member (72). The support member (73) is used to support the sealing member (72), and a plurality of arc-shaped through holes (711) for the medium to pass through are arranged at equal intervals in a ring shape on the sealing member base (71); a movable iron core (8) is slidably installed vertically in the coil bobbin (1), and a valve port (801) is provided at one end of the movable iron core (8) facing the valve port sealing assembly (7). The valve port (801) can be abutted against the sealing member (72) to close the valve.

9. The electromagnetic coil of the direct-acting high-pressure axial solenoid valve according to claim 8, characterized in that: A valve core sealing assembly (9) is limitedly installed between the valve body (6) and the magnetic isolation tube seat (11), and the valve core sealing assembly (9) is sleeved on the movable iron core (8); the valve core sealing assembly (9) includes a base (91) abutted against the valve body (6) and an end cover (92) abutted against the magnetic isolation tube seat (11). A pantograph seal (93) is installed between the base (91) and the end cover (92), and the pantograph seal (93) abuts against the outer wall of the movable iron core (8).

10. The electromagnetic coil of the direct-acting high-pressure axial solenoid valve according to claim 9, characterized in that: A second medium channel (802) is arranged axially in the movable iron core (8), and the valve port (801) communicates with the second medium channel (802); a through hole (803) is arranged radially in the movable iron core (8), and the through hole (803) communicates with the second medium channel (802). The through hole (803) is located above the valve core sealing assembly (9).

Images