Isolation type electromagnetic valve
By using sealed bellows assembly and return spring designs in isolated solenoid valves, the corrosion and blockage problems of existing solenoid valves under strong acid and alkali and heavy pollution conditions are solved, and a higher sealing and service life are achieved.
Patent Information
- Application Number
- CN202420702081.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-07
- Publication Date
- 2025-03-07
- Estimated Expiration
- 2034-04-07
AI Technical Summary
The existing isolation solenoid valves cannot effectively block corrosion and pollutant erosion when facing strong acid and alkali media and heavy pollution conditions, resulting in the normal opening and operation of the valve being affected.
An isolated solenoid valve is designed, with a sealed corrugated tube assembly for double sealing, including a sealed corrugated tube and a sealing ring, to prevent contaminants from entering the moving core, and to ensure normal closing and sealing of the valve through a return spring and a limiting ring.
It effectively prevents corrosion and blockage of solenoid valves by strong acid and strong alkali media and heavy pollutants, improves the sealing and service life of the valve, and ensures the normal operation of the valve under various working conditions.
Smart Images
Figure CN222577351U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of solenoid valves, in particular to an isolation type solenoid valve. Background Art
[0002] The isolation solenoid valve can effectively prevent the working medium from contacting the moving iron core assembly. It is suitable for various scenarios where corrosive and heavily polluted gases or liquids are used as working media. It is widely used in medical and pharmaceutical, chemical, environmental protection, electric power or mining heavy pollution equipment and other automation control systems to open and close the working medium pipeline. Existing isolation solenoid valves mostly use rubber seals for single isolation, which cannot prevent strong acid and alkali media from corroding the moving parts of the solenoid valve, nor can it prevent the pollutant media from clogging and corroding the moving parts of the solenoid valve under heavy pollution conditions, thereby affecting the normal opening and operation of the valve. Utility Model Content
[0003] The purpose of the present utility model is to provide an isolation type solenoid valve to solve the problems mentioned in the background technology. To achieve the above purpose, the present utility model provides the following technical solutions: an isolation type solenoid valve, including a shell, a base is installed inside the shell, a coil assembly is installed on the base, a static iron core is fixedly installed on the upper inner end of the coil assembly, a moving iron core is provided below the static iron core, the lower end of the base is connected to the valve body, a valve cavity is provided inside the valve body, a medium flow channel hole is provided inside the valve cavity, the bottom end of the moving iron core extends into the valve cavity and is connected to the valve core, the valve core is located above the valve seat hole, a sealing bellows assembly is connected above the valve core, a reset spring is sleeved on the lower end of the moving iron core, the upper end of the reset spring is connected to the base, and the lower end is connected to the moving iron core, and a liquid inlet and a liquid outlet are installed on both sides of the valve body;
[0004] The sealing bellows assembly includes a sealing bellows, the bottom of the sealing bellows is connected to the valve core, the top of the sealing bellows is connected to the annular connecting plate, a pressure plate is installed above the annular connecting plate, the pressure plate, the annular connecting plate and the sealing bellows are all sleeved on the bottom end of the moving iron core, and the pressure plate and the annular connecting plate are pressed between the base and the valve body.
[0005] Preferably, a sealing groove is formed at the bottom of the pressing plate, a sealing ring is installed inside the sealing groove, and the sealing ring is in sealing contact with the annular connecting plate.
[0006] Preferably, a limiting convex ring is provided at the lower end of the moving iron core, a mounting cavity is provided at the bottom of the base, the return spring is installed in the mounting cavity, and the lower end is connected to the limiting convex ring.
[0007] Preferably, a shell cover is installed on the top of the shell, and an upper sealing ring is installed between the shell cover and the shell.
[0008] Preferably, the liquid outlet and the liquid inlet are in communication with the valve cavity and are located at the upper and lower sides of the valve hole.
[0009] The technical effects and advantages of the utility model are as follows: the solenoid valve is provided with a sealing bellows assembly, which can prevent pollutants from moving upstream, thereby protecting the moving iron core; and the sealing bellows assembly is provided with double-layer protection of a sealing bellows and a sealing ring, thereby avoiding leakage problems during long-term use and improving the sealing performance. BRIEF DESCRIPTION OF THE DRAWINGS
[0010] Figure 1 It is a schematic diagram of the structure of the utility model in a closed state;
[0011] Figure 2 It is a schematic diagram of the structure of the utility model in the conducting state.
[0012] In the figure, 1. shell; 2. base; 3. coil assembly; 4. static iron core; 5. moving iron core; 6. valve body; 7. valve cavity; 8. valve hole; 9. valve core; 10. reset spring; 11. liquid inlet; 12. liquid outlet; 13. sealing bellows; 14. annular connecting plate; 15. pressure plate; 16. sealing groove; 17. sealing ring; 18. limiting convex ring; 19. installation cavity; 20. shell cover; 21. upper sealing ring. DETAILED DESCRIPTION
[0013] In order to make the technical means for realizing the utility model, creative features, objectives and effects easy to understand, the utility model is further explained below in conjunction with specific diagrams. In the description of the utility model, it should be noted that, unless otherwise clearly stipulated and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, an integral connection or a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be internal communication between two components.
[0014] Example
[0015] like Figure 1 and Figure 2An isolated solenoid valve is shown, comprising a shell 1, a base 2 is installed inside the shell 1, a coil assembly 3 is installed on the base 2, a static iron core 4 is fixedly installed on the upper inner end of the coil assembly 3, a moving iron core 5 is arranged below the static iron core 4, the coil assembly 3 is connected to an external power supply, and the moving iron core 5 can be driven by the coil assembly 3 to cooperate with the static iron core 4 to move up and down, thereby realizing the opening and closing of the solenoid valve; the lower end of the base 2 is connected to a valve body 6, a valve cavity 7 is arranged inside the valve body 6, a valve hole 8 is arranged inside the valve cavity 7, the bottom end of the moving iron core 5 extends into the valve cavity 7 and is connected to a valve core 9, the valve core 9 is located above the valve hole 8, and when the valve core 9 moves downward, The valve core 9 can seal and block the valve hole 8, thereby blocking the passage of liquid; the sealing bellows assembly is connected above the valve core 9, and a reset spring 10 is sleeved on the lower end of the moving iron core 5. The upper end of the reset spring 10 is connected to the base 2, and the lower end is connected to the moving iron core 5. When the coil assembly 3 is not energized, the reset spring 10 drives the moving iron core 5 downward to make the valve core 9 block the valve hole 8, so that the liquid cannot flow through the valve hole 8; a liquid inlet 11 and a liquid outlet 12 are installed on both sides of the valve body 6. The liquid outlet 12 and the liquid inlet 11 are connected to the valve cavity 7 and are located on the upper and lower sides of the valve hole 8. The liquid outlet 12 is located higher than the liquid inlet 11. The flow of liquid can be controlled by the on and off of the valve hole 8;
[0016] The sealing bellows assembly includes a sealing bellows 13, the bottom of the sealing bellows 13 is connected to the valve core 9, the top of the sealing bellows 13 is connected to the annular connecting plate 14, a pressing plate 15 is installed above the annular connecting plate 14, the pressing plate 15, the annular connecting plate 14 and the sealing bellows 13 are all sleeved on the bottom end of the moving iron core 5, the pressing plate 14 and the annular connecting plate 14 are pressed between the base 2 and the valve body 6, a sealing groove 16 is opened at the bottom of the pressing plate 15, a sealing ring 17 is installed inside the sealing groove 16, and the sealing ring 17 It is in sealed contact with the annular connecting plate 14; the sealing bellows 13 is sleeved on the bottom end of the moving iron core 5. When the liquid enters the valve chamber 7, the sealing bellows 13 prevents the liquid from contacting the moving iron core 5, and the pressure plate 14 and the annular connecting plate 14 at the upper end of the sealing bellows 13 are pressed tightly, thereby preventing the liquid from entering the base 2 and damaging the coil assembly 3, the moving iron core 5, etc.; at the same time, a sealing ring 17 is added to avoid a gap when the connection between the base 2 and the valve body 6 is loose, thereby improving the sealing effect.
[0017] In order to facilitate the installation of the return spring 10 , a limiting convex ring 18 is provided at the lower end of the moving iron core 5 , and a mounting cavity 19 is provided at the bottom of the base 2 . The return spring 10 is installed in the mounting cavity 19 , and the lower end is connected to the limiting convex ring 18 .
[0018] A shell cover 20 is installed on the top of the shell 1, and an upper sealing ring 21 is installed between the shell cover 20 and the shell 1. The upper sealing ring 21 ensures the sealing between the shell cover 20 and the shell 1. The shell cover 20 can prevent the entry of foreign matter and avoid damage to the coil assembly 3, etc., and can also prevent the entry of water vapor and avoid leakage problems.
[0019] The process flow and working principle of the utility model are as follows: when using the solenoid valve, the liquid inlet 11 and the liquid outlet 12 are connected to the pipeline. When the solenoid valve needs to be turned on, the coil assembly 3 is energized, the static iron core 4 attracts the moving iron core 5 to move upward, the moving iron core 5 drives the valve core 9 to move upward, the sealing bellows 13 is folded, the valve core 9 leaves the valve hole 8, and the liquid passes through the valve hole 8 from the liquid inlet 11 to the liquid outlet 12. Figure 2 As shown; when the solenoid valve needs to be closed, the coil assembly 3 loses power, the static iron core 4 cannot absorb the moving iron core 5, the reset spring 10 drives the moving iron core 5 to move downward, the moving iron core 5 drives the valve core 9 to move downward, the sealing bellows 13 stretches, the valve core 9 blocks the valve hole 8, and the liquid cannot pass through the valve hole 8 from the liquid inlet 11 to the liquid outlet 12, as shown Figure 1 As shown; during the entire working process of the solenoid valve, the liquid in the valve chamber 7 cannot reach the base 2 and the inside of the housing 1 through the sealing bellows 13 and the sealing ring 17, which can effectively prevent the liquid from damaging the moving iron core 5 and also prevent the residue in the liquid from getting stuck in the moving iron core 5.
[0020] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. An isolation type solenoid valve, comprising a housing, wherein a base is installed inside the housing, characterized in that: A coil assembly is installed on the base, a static iron core is fixedly installed on the inner upper end of the coil assembly, a moving iron core is arranged below the static iron core, the lower end of the base is connected to the valve body, a valve cavity is arranged inside the valve body, a flow channel hole for medium circulation is arranged inside the valve cavity, the bottom end of the moving iron core extends into the valve cavity and is connected to the valve core, the valve core is located above the valve seat hole, a sealing bellows assembly is connected above the valve core, a reset spring is sleeved on the lower end of the moving iron core, the upper end of the reset spring is connected to the base, and the lower end is connected to the moving iron core, and a liquid inlet and a liquid outlet are arranged on both sides of the valve body; The sealing bellows assembly includes a sealing bellows, the bottom of the sealing bellows is connected to the valve core, the top of the sealing bellows is connected to the annular connecting plate, a pressure plate is installed above the annular connecting plate, the pressure plate, the annular connecting plate and the sealing bellows are all sleeved on the bottom end of the moving iron core, and the pressure plate and the annular connecting plate are pressed between the base and the valve body.
2. An isolation solenoid valve according to claim 1, characterized in that: A sealing groove is provided at the bottom of the pressing plate, a sealing ring is installed inside the sealing groove, and the sealing ring is in sealing contact with the annular connecting plate.
3. The isolation solenoid valve according to claim 1, characterized in that: A limiting convex ring is provided at the lower end of the moving iron core, a mounting cavity is provided at the bottom of the base, the return spring is installed in the mounting cavity, and the lower end is connected to the limiting convex ring.
4. The isolation solenoid valve according to claim 1, characterized in that: A shell cover is installed on the top of the shell, and an upper sealing ring is installed between the shell cover and the shell.
5. The isolation solenoid valve according to claim 1, characterized in that: The liquid outlet and the liquid inlet are communicated with the valve cavity and are located at the upper and lower sides of the valve seat hole.