CN204985944U - Your bi -pass high frequency electric magnet valve - Google Patents

Abstract

The two-position two-way high-frequency electromagnetic valve disclosed by the utility model includes a valve body and a pilot assembly. The valve body is respectively provided with an air inlet and an air outlet, and the valve body is provided with an air guide hole for connecting the air inlet and the air outlet. The pilot assembly includes a casing, a moving iron core, a static iron core and a coil assembly. An air chamber is formed between the casing, the static iron core and the moving iron core. The matching seal, a return spring is provided between the seal and the static iron core, and the bottom end of the casing extends with an external thread connection, and the casing is threaded with the valve body through the external thread connection; the inner diameter of the external thread connection Larger than the inner diameter of the casing, the bottom outer wall of the moving iron core is provided with a diameter-reducing slope; the outer wall of the moving iron core is also provided with a number of air guide grooves connecting the air inlet with the air chamber. The utility model has the advantages of simple and reasonable structure, convenient assembly, convenient repair and maintenance, high sensitivity, good air tightness and large output flow.

Description

Two-position two-way high-frequency solenoid valve

technical field

The utility model relates to the technical field of valves, in particular to a two-position two-way high-frequency electromagnetic valve.

Background technique

Solenoid valve is an automatic control component commonly used in industrial control systems, and it is widely used. There are many types of solenoid valves, and the two-position two-way solenoid valve is one of them. The existing two-position two-way solenoid valve usually has the following defects due to unreasonable structural settings: first, the installation structure of the valve body and the sleeve is unreasonable, such as a kind of "solenoid valve" disclosed by the authorized announcement number CN101988583B. During the assembly process, the valve body and the casing are fixed by welding. Although this welding connection method has a good fixing effect, it is difficult to disassemble the valve body and the casing when the micro valve fails, resulting in maintenance and repair. It is relatively inconvenient; the second, the current two-position two-way solenoid valve is usually provided with an exhaust channel connected to the atmosphere in the axial direction of the static iron core, and the residual gas between the static iron core and the moving iron core is discharged through the exhaust channel. , so that the moving iron core can move quickly when the coil assembly is energized, but because there is inevitably a radial gap between the moving iron core and the casing, after the exhaust channel is set, a part of the gas in the air inlet will pass through The exhaust channel leaks into the atmosphere, resulting in uncontrollable airtightness of the valve; third, due to the unreasonable structural setting of the moving iron core and the casing, less gas accumulates near the input end of the air guide hole during operation. When it is open, the output flow of the air outlet is small, resulting in the inability to achieve the effect of large flow output.

Utility model content

The purpose of this utility model is to aim at the defects and deficiencies of the prior art, and provide a two-position two-way high-speed air compressor with simple and reasonable structure, convenient assembly, convenient maintenance and repair, high sensitivity, good air tightness, and large output flow. frequency solenoid valve.

In order to achieve the above object, the utility model adopts the following technical solutions:

The two-position two-way high-frequency electromagnetic valve described in the utility model includes a valve body and a pilot assembly, the valve body is respectively provided with an air inlet and an air outlet, and the valve body is provided with a and the air guide hole of the air outlet, the pilot assembly includes a casing, a moving iron core, a static iron core and a coil assembly, the moving iron core is movably arranged in the casing, and the static iron core is fixedly arranged, An air chamber is formed between the casing, the static iron core and the moving iron core, the coil assembly is fixed outside the casing, and the bottom end of the moving iron core extends into the The valve body is fixedly connected with a sealing member that is sealingly matched with the input end of the air guide hole, a return spring is provided between the sealing member and the static iron core, and an external thread connection portion extends from the bottom end of the sleeve , the casing is threadedly connected to the valve body through the external thread connection; the inner diameter of the external thread connection is larger than the inner diameter of the casing, and the outer wall of the bottom of the moving iron core is provided with a reduced diameter Inclined surface; the outer wall of the moving iron core is also provided with several air guiding grooves connecting the air inlet and the air chamber.

Further, a sealing ring is provided between the external thread connection part and the valve body.

Further, the valve body is provided with a boss that abuts against the sealing member, and the boss is provided with the air guide hole in the axial direction.

Further, the seal is made of rubber material.

The beneficial effects of the utility model are: by extending the external thread connection part at the bottom end of the sleeve, the sleeve tube is threadedly connected with the valve body through the external thread connection part during installation. Compared with the prior art, the utility model does not need to use Welding and fixing, installation and disassembly are relatively convenient, and it is convenient to maintain and overhaul the utility model; by making the inner diameter of the external thread connection part larger than the inner diameter of the sleeve, and setting a reducing slope on the bottom outer wall of the moving iron core, so that The outer diameter of the lower end of the moving iron core is smaller than the outer diameter of the upper end, effectively increasing the space near the input end of the air guide hole, so that more gas can be accumulated near the input end of the air guide hole, thereby effectively ensuring that when the seal follows the moving iron core When detached from the air guide hole, the output flow of the air outlet is relatively large, which has the effect of large flow output; by setting a number of air guide grooves on the outer wall of the moving iron core, compared with the prior art, the utility model does not need to be installed in the static iron core. The exhaust channel is provided, which not only effectively discharges the residual gas between the moving iron core and the static iron core, ensures the sensitivity of the moving iron core, but also helps to improve the sealing effect of the utility model and avoids the occurrence of air leakage. The utility model has a simple and reasonable structure setting.

Description of drawings

Fig. 1 is a schematic diagram of the overall structure of the utility model.

In Figure 1:

1. Valve body; 11. Air inlet; 12. Air outlet; 13. Air guide hole; 14. Boss; 21. Sleeve; 22. Moving iron core; , static iron core; 24, coil assembly; 25, seal; 26, return spring; 27, external thread connection; 28, sealing ring; A, air chamber.

detailed description

Below in conjunction with accompanying drawing, the utility model is further described.

The two-position two-way high-frequency solenoid valve shown in Figure 1 includes a valve body 1 and a pilot assembly. The valve body 1 is provided with an air inlet 11 and an air outlet 12 respectively. 11 and the air guide hole 13 of the air outlet 12, the pilot assembly includes a casing 21, a moving iron core 22, a static iron core 23 and a coil assembly 24, and the casing 21 is provided with a movable iron core 22 and a fixed iron core 23 , an air chamber A is formed between the casing 21, the static iron core 23 and the moving iron core 22, the coil assembly 24 is fixed on the outside of the casing 21, and the bottom end of the moving iron core 22 extends into the valve body 1 and is fixed A seal 25 is connected with the input end of the air guide hole 13. Preferably, the seal 25 is made of rubber material. The service life of the rubber seal 25 is longer and the blocking effect is better. The seal 25 and the static iron A return spring 26 is provided between the cores 23 .

The bottom end of the casing 21 is extended with an external thread connecting portion 27, and the casing 21 is threadedly connected with the valve body 1 through the external thread connecting portion 27. Compared with the prior art, the utility model does not need to be fixed by welding, and the installation is more convenient. And dismounting is also comparatively convenient, is convenient to carry out maintenance and overhaul to the utility model.

The inner diameter of the externally threaded connection part 27 is greater than the inner diameter of the casing 21, and the bottom outer wall of the moving iron core 22 is provided with a diameter-reducing slope 221, so that the outer diameter of the lower end of the moving iron core 22 is smaller than the outer diameter of its upper end. The structure effectively increases the space near the input end of the air guide hole 13, so that more gas can be accumulated near the input end of the air guide hole 13, thereby effectively ensuring that when the sealing member 25 and the follower core 22 are separated from the air guide hole 13, the air outlet The output flow of 12 is relatively large, which has played the effect of large flow output.

The outer wall of the moving iron core 22 is also provided with some air guide grooves 222 that connect the air inlet 11 with the air chamber A. Compared with the prior art, the utility model does not need to arrange an exhaust passage in the static iron core 23, which is effective. The residual gas between the moving iron core 22 and the static iron core 23 is discharged, the sensitivity of the moving iron core 22 is ensured, the sealing effect of the utility model is improved, and the occurrence of air leakage is avoided.

In order to further improve the airtightness of the utility model, a sealing ring 28 is arranged between the threaded connection part and the valve body 1 . The valve body 1 is provided with a boss 14 that is in contact with the seal 25. The boss 14 is provided with an air guide hole 13 along the axial direction. By setting the boss 14, when the coil assembly 24 is not powered, the seal 25 and the boss 14 Sealed contact, thereby effectively ensuring the blocking effect on the air guide hole 13, making the working performance of the utility model more stable.

The two-position two-way high-frequency electromagnetic valve provided by the utility model adopts a direct-acting structure and a cut-off seal, and has reliable sealing performance. The moving iron core 22 can move 25 times per second during operation, and is effectively suitable for high-frequency applications. The working principle of the utility model is: in the initial state, the coil assembly 24 is not energized, and the moving iron core 22 is in close contact with the input end of the air guide hole 13 through the sealing member 25 under the action of the return spring 26. At this time, the air guide hole 13 is closed. The gas in the air inlet 11 cannot flow to the air outlet 12; under the working condition, the coil assembly 24 is energized, and the static iron core 23 generates electromagnetic attraction force, which attracts the moving iron core 22 to move upward. On the one hand, the gas in the air chamber A The residual gas flows back to the vicinity of the input end of the air guide hole 13 through the air guide groove 222. On the other hand, the sealing member 25 is separated from the input end of the air guide hole 13, and a gas passage is formed between the air inlet 11, the air guide hole 13 and the air outlet 12. At this time, the gas in the air inlet 11 flows to the air outlet 12; when the coil assembly 24 is powered off again, the sealing member 25 is in sealing contact with the input end of the air guide hole 13 again under the drive of the moving iron core 22, so that the air outlet 12 No gas output.

The above is only a preferred embodiment of the utility model, so all equivalent changes or modifications made according to the structure, features and principles described in the utility model patent application scope are all included in the utility model patent application scope .

Claims (4)

1. Two-position two-way high-frequency solenoid valve, including a valve body and a pilot assembly. The valve body is respectively provided with an air inlet and an air outlet. The air guide hole of the air port, the pilot assembly includes a casing, a moving iron core, a static iron core and a coil assembly, the moving iron core is movably arranged in the casing, the static iron core is fixedly arranged, the casing 1. An air chamber is formed between the static iron core and the moving iron core, the coil assembly is fixed outside the casing, and the bottom end of the moving iron core extends into the valve body and is fixed A sealing member is connected with the input end of the air guide hole, and a return spring is provided between the sealing member and the static iron core. It is characterized in that an external thread connection part extends from the bottom end of the sleeve , the casing is threadedly connected to the valve body through the external thread connection; the inner diameter of the external thread connection is larger than the inner diameter of the casing, and the outer wall of the bottom of the moving iron core is provided with a reduced diameter Inclined surface; the outer wall of the moving iron core is also provided with several air guiding grooves connecting the air inlet and the air chamber. 2. The two-position two-way high-frequency solenoid valve according to claim 1, characterized in that: a sealing ring is provided between the external thread connection part and the valve body. 3. The two-position two-way high-frequency solenoid valve according to claim 1, characterized in that: the valve body is provided with a boss that is in contact with the sealing member, and the boss is axially provided with the Air hole. 4. The two-position two-way high-frequency solenoid valve according to claim 1, wherein the sealing member is made of rubber material.