Electromagnetic valve
By adopting an integrated eccentric structure, the existing solenoid valve has large volume, cumbersome assembly and high leakage risk, achieving a more compact structure, simpler assembly and lower leakage risk, and extending the service life of the solenoid valve.
Patent Information
- Application Number
- CN202421706249.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-18
- Publication Date
- 2025-06-24
- Estimated Expiration
- 2034-07-18
AI Technical Summary
The existing solenoid valves are large in size and heavier in weight, and the assembly process is cumbersome, which increases the possibility of leakage. Moreover, the tightening parts of the valve seat and the valve body are difficult to replace separately, shortening the service life of the solenoid valve.
The valve body design with an integrated eccentric structure simplifies the valve body structure, reduces the sealing point, and achieves a more compact volume and a simpler assembly process.
It achieves the reduction of the solenoid valve size, simplified assembly and reduced leakage risk, extends the service life of the solenoid valve and reduces maintenance costs.
Smart Images
Figure CN223019569U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of automobile parts, and particularly relates to a solenoid valve. Background Art
[0002] In the field of fluid control, the solenoid valve is a key component for the flow path to be conducted. Generally speaking, the existing solenoid valve is composed of components such as a main valve body, a coil assembly, a spool component, and a pilot valve body. Among them, the coil assembly and the spool component are relatively fixed, and the pilot valve body is firmly fixed on the valve body. However, most of the components of the same type of solenoid valve body on the market belong to an assembled structure, which directly leads to the relatively large size and heavy weight of the solenoid valve, occupying too much space during installation and use. At the same time, in the assembly process, it is necessary to first lock the valve seat on the valve body, and then lock and assemble the spool with the valve seat. Such complicated assembly steps increase the number of sealing points, thereby increasing the possibility of leakage, greatly affecting the working reliability and stability of the solenoid valve. In addition, once a problem occurs in the part where the valve seat is locked and tightened with the valve body, since it is difficult to replace local components separately, the entire solenoid valve has to be replaced, which undoubtedly shortens the service life of the solenoid valve, increases the use cost, and also causes great trouble to maintenance, consuming a large amount of human and material resources. Content of the Utility Model
[0003] In view of the above situation, the utility model proposes a solenoid valve with a valve body of an integrated eccentric structure to reduce its volume and achieve miniaturization.
[0004] To achieve the above object, the utility model adopts the following technical solutions:
[0005] A solenoid valve, comprising a coil assembly, an iron core assembly, a pilot spool, a valve seat, a piston assembly, a return spring, a valve cover, and a valve body of an integrated eccentric structure;
[0006] The upper end surface of the valve body is provided with a main valve cavity and a pilot valve cavity at intervals. The main valve cavity includes an upper large-diameter piston cavity and a lower small-diameter communication cavity that is coaxial with and connected up and down to the upper large-diameter piston cavity. The lower end of the valve body is provided with an outlet cavity, and the outlet cavity is eccentrically connected and communicated with the lower small-diameter communication cavity. The middle side part of the valve body is provided with an inlet cavity, and the inlet cavity is connected with the upper large-diameter piston cavity. The valve body is provided with a first channel and a second channel. The upper end of the first channel is connected with the upper part of the upper large-diameter piston cavity, the lower end of the first channel is connected with the lower end of the pilot valve cavity, the upper end of the second channel is connected with the lower end of the pilot valve cavity, and the lower end of the second channel is connected with the outlet cavity;
[0007] The piston assembly is movably disposed at the lower part of the upper large-diameter piston cavity. The piston assembly includes a connecting body, a main piston fixedly arranged on the upper part of the connecting body, and a sealing plug fixedly arranged on the lower part of the connecting body. The main piston is provided with a diversion hole parallel to its axial direction. The valve cover is fixedly covered on the upper opening end of the upper large-diameter piston cavity. The upper end of the return spring abuts against the lower end surface of the valve cover, and the lower end of the return spring abuts against the upper end surface of the piston assembly.
[0008] The valve seat is fixedly arranged in the pilot valve cavity. The coil assembly is fixedly arranged above the pilot valve cavity. The iron core assembly is assembled in the coil assembly. The pilot valve core is movably disposed at the lower part of the pilot valve cavity. The moving iron core of the iron core assembly movably penetrates through the valve seat and is coaxially matched with the pilot valve core.
[0009] To better implement the above technical solution, optionally, the first channel includes a first straight hole section and a first inclined hole section. The first straight hole section is opened on the lower end surface of the pilot valve cavity. The first inclined hole section is opened on the upper side wall of the upper large-diameter piston cavity. The lower end of the first straight hole section is connected to the lower end of the first inclined hole section.
[0010] Optionally, the second channel includes a second straight hole section and a lower inclined hole section connected to the second straight hole section.
[0011] Optionally, a first O-ring is nested on the outer circumferential wall of the valve seat in the circumferential direction.
[0012] Optionally, a second O-ring is nested on the outer peripheral surface of the valve cover.
[0013] Advantages of the present utility model:
[0014] The solenoid valve of the present utility model adopts a valve body with an integrated eccentric structure. Compared with the existing split-type pilot valve body and main valve body, its valve body structure is compact, the volume is smaller, the assembly is more convenient, and at the same time, there are fewer sealing points, which can reduce the risk of leakage. Description of the drawings
[0015] Figure 1 is a three-dimensional schematic diagram of a solenoid valve according to an embodiment of the present utility model;
[0016] Figure 2 is Figure 1 a sectional view of
[0017] Figure 3 is Figure 1 a matching diagram of the iron core assembly and the pilot valve core in
[0018] Figure 4 is Figure 1 an exploded view of
[0019] Figure 5 is Figure 4 a three-dimensional schematic diagram of the valve body in
[0020] Figure 6 is Figure 5 the top view of;
[0021] Figure 7 is Figure 6 the sectional view taken along the line A - A in;
[0022] Figure 8 is the first - perspective three - dimensional view of the piston component in 4;
[0023] Figure 9 is the second - perspective three - dimensional view of the piston component in 4;
[0024] Reference numerals:
[0025] Valve body 10, main valve cavity 11, upper large - diameter piston cavity 111, lower small - diameter connecting cavity 112, pilot valve cavity 12, outlet cavity 13, inlet cavity 14, first channel 15, second channel 16, second straight - hole section 161, lower inclined - hole section 162, first straight - hole section 151, coil assembly 20, iron - core assembly 30, static iron core 31, moving iron core 32, pilot valve core 40, valve seat 50, first O - ring 51, piston assembly 60, connecting body 61, main piston 62, diversion hole 621, sealing plug 63, return spring 70, valve cover 80, second O - ring 81. Detailed implementation manners
[0026] The technical solutions of the present utility model will be described in detail below in conjunction with the accompanying drawings and specific embodiments. The same components are denoted by the same reference numerals.
[0027] Please refer to Figures 1 to 9 , an embodiment of the present utility model discloses a solenoid valve, which includes a coil assembly 20, an iron - core assembly 30, a pilot valve core 40, a valve seat 50, a piston assembly 60, a return spring 70, a valve cover 80, and a valve body 10 with an integrated eccentric structure.
[0028] As Figures 5 - 7As shown, the upper end surface of the valve body 10 is provided with a main valve cavity 11 and a pilot valve cavity 12 at intervals. The main valve cavity 11 includes an upper large-diameter piston cavity 111 and a lower small-diameter communication cavity 112 that is coaxial with and connected to the upper large-diameter piston cavity 111 up and down. The lower end of the valve body 10 is provided with an outlet cavity 13, and the outlet cavity 13 is eccentrically connected to and communicated with the lower small-diameter communication cavity 112. Specifically, the upper large-diameter piston cavity 111, the lower small-diameter communication cavity 112, the pilot valve cavity 12, and the outlet cavity 13 are all hollow cylindrical cavities. An inlet cavity 14 is provided on the middle side of the valve body 10. The inlet cavity 14 is connected to the upper large-diameter piston cavity 111, and the central axis of the inlet cavity 14 is perpendicular to the central axis of the main valve cavity 11. A first channel 15 and a second channel 16 are provided in the valve body 10. The upper end of the first channel 15 is connected to the upper part of the upper large-diameter piston cavity 111, and the lower end of the first channel 15 is connected to the lower end of the pilot valve cavity 12. The upper end of the second channel 16 is connected to the lower end of the pilot valve cavity 12, and the lower end of the second channel 16 is connected to the outlet cavity 13.
[0029] As Figure 1 , Figure 2 , Figure 4 , Figure 8 and Figure 9 shown, the piston assembly 60 is movably disposed in the lower part of the upper large-diameter piston cavity 111. The piston assembly 60 is movably disposed in the lower part of the upper large-diameter piston cavity 111. Specifically, the piston assembly 60 includes a connecting body 61, a main piston 62 fixedly provided on the upper part of the connecting body 61, and a sealing plug 63 fixedly provided on the lower part of the connecting body 61. The main piston 62 is provided with a diversion hole 621 parallel to its axial direction. The valve cover 80 is fixedly covered on the opening end of the upper large-diameter piston cavity 111. The upper end of the return spring 70 abuts against the upper end surface of the valve cover 80, and the lower end of the return spring 70 abuts against the upper end surface of the piston assembly 60.
[0030] As Figure 1 , Figure 2 , Figure 3 and Figure 4 shown, the valve seat 50 is fixedly provided in the pilot valve cavity 12. The coil assembly 20 is fixedly provided above the pilot valve cavity 12. The iron core assembly 30 is assembled in the coil assembly 20. The pilot valve core 40 is movably disposed in the lower part of the pilot valve core 40 cavity. The moving iron core 32 of the iron core assembly 30 movably penetrates through the valve seat 50 and is coaxially arranged with the pilot valve core 40.
[0031] As Figure 5 , Figure 7 , Figure 8 and Figure 9As shown in the figure, the solenoid valve of the embodiment of the present utility model is a normally closed solenoid valve. When the coil assembly 20 is de-energized, the pilot valve core 40 is sealed at the upper end of the second channel 16 under the pushing action of the moving iron core 32 of the iron core assembly 30. The medium in the valve body 10 is cut off at the upper end of the second channel 16. The sealing plug 63 is sealed at the lower small-diameter communication cavity 112. The upper large-diameter piston cavity 111 is in a relatively high-pressure state, and the lower small-diameter communication cavity 112 is in a relatively low-pressure state. At this time, the solenoid valve is in the closed state.
[0032] When the coil assembly 20 is energized, the coil assembly 20 generates an electromagnetic force. The static iron core 31 of the iron core assembly 30 attracts the moving iron core 32, causing the moving iron core 32 to move upward. The pilot valve core 40 moves upward synchronously with the moving iron core 32 under the action of pressure. At this time, the second channel 16 remains open. The pressure in the upper large-diameter piston cavity 111 is input into the pilot valve cavity 12 through the first channel 15, and then vented into the outlet cavity 13 through the second channel 16, so that the pressure in the upper large-diameter piston cavity 111 is relatively reduced, and the pressure in the lower small-diameter communication cavity 112 is relatively increased. The piston assembly 60 moves upward through the pressure difference. The sealing plug 63 is disengaged from the lower small-diameter communication cavity 112. At this time, the lower small-diameter communication cavity 112 is opened, and at the same time, the return spring 70 is in a compressed state. The medium is input into the outlet cavity 13 through the inlet cavity 14, the upper large-diameter piston cavity 111, and the lower small-diameter communication cavity 112. At this time, the solenoid valve is in the open state.
[0033] When the coil assembly 20 is de-energized, the electromagnetic force disappears. The moving iron core 32 in the iron core assembly 30 resets and pushes the pilot valve core 40 to close the second channel 16. The pressure in the upper large-diameter piston cavity 111 is relatively increased, and the pressure in the lower small-diameter communication cavity 112 is relatively reduced. Under the action of the pressure difference and the return spring 70, the whole piston assembly 60 moves downward to make the sealing plug 63 seal the lower small-diameter communication cavity 112.
[0034] The solenoid valve of the embodiment of the present utility model adopts a valve body 10 with an integral eccentric structure. Compared with the existing split-type pilot valve body and main valve body, its valve body 10 has a compact structure, a smaller volume, and is more convenient to assemble.
[0035] As Figure 7 shown, in the embodiment of the present utility model, the first channel 15 includes a first straight hole section 151 and a first inclined hole section 152. The first straight hole section 151 is opened on the lower end surface of the pilot valve cavity 12, and the first inclined hole section 152 is opened on the upper side wall of the upper large-diameter piston cavity 111. The lower end of the first straight hole section 151 is connected to the lower end of the first inclined hole section 152.
[0036] As Figure 7As shown, in the embodiment of the present utility model, the second channel 16 includes a second straight hole section 161 and a lower inclined hole section 162 connected to the second straight hole section 161. The upper port of the second straight hole section 161 is higher than the upper port of the first straight hole section 151. The pilot valve core 40 only closes the second straight hole section 161 and does not close the first straight hole section 151, so that the high pressure in the pilot valve cavity 12 can press the pilot valve core 40 to be sealed at the upper end of the second straight hole section 161, which helps to improve the sealing performance between the pilot valve core 40 and the upper end face of the second straight hole section 161.
[0037] As Figure 2 shown, in the embodiment of the present utility model, a first O-ring 51 is nested circumferentially on the outer ring wall of the valve seat 50. The setting of the first O-ring 51 can increase the sealing performance at the connection between the valve seat 50 and the pilot valve cavity 12. A second O-ring 81 is nested on the outer peripheral surface of the valve cover 80. The setting of the second O-ring 81 can increase the sealing performance at the connection between the valve cover 80 and the upper large-diameter piston cavity 111.
[0038] Above, the technical solution of the present utility model has been introduced in detail in combination with specific embodiments. The described specific embodiments are used to help understand the idea of the present utility model. The derivations and deformations made by those skilled in the art based on the specific embodiments of the present utility model also fall within the protection scope of the present utility model.
Claims
1. A solenoid valve, comprising a coil assembly (20), an iron core assembly (30), a pilot valve core (40), a valve seat (50), a piston assembly (60), a return spring (70) and a valve cover (80), characterized in that: It also includes a valve body (10) with an integrated eccentric structure; The upper end surface of the valve body (10) is provided with a main valve chamber (11) and a pilot valve chamber (12) at intervals, the main valve chamber (11) comprising an upper large-diameter piston chamber (111) and a lower small-diameter communication chamber (112) which is coaxial with the upper large-diameter piston chamber (111) and connected to the upper and lower parts, the lower end of the valve body (10) is provided with an outlet chamber (13), the outlet chamber (13) is eccentrically connected to and communicates with the lower small-diameter communication chamber (112), the middle side of the valve body (10) is provided with an inlet chamber (14), The inlet chamber (14) is connected to the upper large-diameter piston chamber (111); a first channel (15) and a second channel (16) are provided in the valve body (10); the upper end of the first channel (15) is connected to the upper part of the upper large-diameter piston chamber (111); the lower end of the first channel (15) is connected to the lower end of the pilot valve chamber (12); the upper end of the second channel (16) is connected to the lower end of the pilot valve chamber (12); and the lower end of the second channel (16) is connected to the outlet chamber (13); The piston assembly (60) is movably disposed in the lower part of the upper large-diameter piston chamber (111), the piston assembly (60) comprises a connecting body (61), a main piston (62) fixedly disposed on the upper part of the connecting body (61), and a sealing plug (63) fixedly disposed on the lower part of the connecting body (61), the main piston (62) is provided with a guide hole (621) parallel to its axial direction, the valve cover (80) is fixedly disposed on the upper opening end of the upper large-diameter piston chamber (111), the upper end of the return spring (70) is pressed against the lower end surface of the valve cover (80), and the lower end of the return spring (70) is pressed against the upper end surface of the piston assembly (60); The valve seat (50) is fixedly arranged in the pilot valve cavity (12), the coil assembly (20) is fixedly arranged above the pilot valve cavity (12), the iron core assembly (30) is assembled in the coil assembly (20), the pilot valve core (40) is movably arranged in the lower part of the pilot valve cavity (12), and the movable iron core (32) of the iron core assembly (30) movably penetrates the valve seat (50) and is coaxially arranged with the pilot valve core (40).
2. A solenoid valve according to claim 1, characterized in that: The first channel (15) comprises a first straight hole section (151) and a first inclined hole section (152); the first straight hole section (151) is provided on the lower end surface of the pilot valve chamber (12); the first inclined hole section (152) is provided on the upper side wall of the upper large-diameter piston chamber (111); the lower end of the first straight hole section (151) is connected to the lower end of the first inclined hole section (152).
3. The solenoid valve according to claim 1, characterized in that: The second channel (16) comprises a second straight hole section (161) and a lower inclined hole section (162) connected to the second straight hole section (161).
4. The solenoid valve according to claim 1, characterized in that: A first O-ring (51) is nested in the circumferential direction of the outer ring wall of the valve seat (50).
5. The solenoid valve according to claim 1, characterized in that: A second O-ring (81) is embedded in the outer peripheral surface of the valve cover (80).