Hits:Updated:2020-05-14 09:05:44【Print】
Background technology:
The pilot head is an actuator matched with the solenoid valve, which includes a sleeve, a moving iron core, a static iron core and a solenoid coil. The moving iron core and the static iron core are arranged in the sleeve, the solenoid coil is arranged on the outer wall of the sleeve, the first return spring is arranged between the moving iron core and the sleeve, the bottom end of the sleeve is fixed on the base, a cavity is formed between the sleeve and the base, and the moving iron core is arranged in the cavity The base is provided with an air inlet and a gas guide hole, both of which are connected with the chamber, the static iron core is provided with an air outlet, the air outlet and the gas guide hole are respectively matched with both ends of the moving iron core, and the moving iron core is provided with an air outlet channel for the air inlet and the air outlet. However, when the existing pilot head works, due to the high working frequency of the moving iron core, it makes frequent contact between the moving iron core and the static iron core, resulting in greater wear between the moving iron core and the static iron core, shorter service life, and greater friction between the moving iron core and the sleeve, making the sensitivity of the pilot head lower.
In view of the shortcomings and defects of the prior art, the utility model provides a solenoid valve pilot head, which has simple and reasonable structure, is not easy to wear, has high sensitivity and long service life.
To achieve the above purpose, the utility model provides the following technical scheme:
The utility model relates to a solenoid valve pilot head, which comprises a base and a pilot head assembly. The pilot head assembly comprises a sleeve, a moving iron core, a static iron core and a solenoid coil. The moving iron core and the static iron core are arranged in the sleeve, the solenoid coil is arranged on the outer wall of the sleeve, a first reset spring is arranged between the moving iron core and the sleeve, the sleeve end is fixedly arranged on the base, and the sleeve and the base are formed The moving iron core is movably arranged in the cavity, the base is provided with air inlet and air guide hole, the air inlet and air guide hole are all connected with the cavity, the static iron core is provided with air outlet, the air outlet and air guide hole are respectively matched with the two ends of the moving iron core, the moving iron core is also provided with an exhaust channel for the air inlet and air outlet, the base is internally convex with a second convex block, and the air inlet end of the air guide hole penetrates along the axial direction Through the second convex block, the bottom of the static iron core is convex with the first convex block, and the air inlet end of the air outlet runs through the first convex block along the axial direction; the top of the moving iron core is equipped with the first plug head which is sealed and matched with the first convex block; the bottom of the moving iron core is equipped with the second plug head which is sealed and matched with the second convex block; the bottom of the static iron core is also equipped with the sealing washer which is fixed on the static iron core and the outer wall of the moving iron core is equipped with There are ring grooves.
Further, the base is fixedly connected with a fixing sleeve, and the sleeve is connected with a fixing sleeve buckle.
Further, the base is also provided with a manual rod matched with a moving iron core.
Further, a second return spring is arranged between the manual rod and the base.
Further, a sealing ring is arranged between the manual rod and the base.
Compared with the prior art, the beneficial effect of the utility model is: through the cooperation between the first plug head and the first convex block, and the cooperation between the second plug head and the second convex block, the impact force of the moving iron core and the base and the static iron core is reduced when the moving iron core frequently acts, and the sealing washer arranged on the static iron core plays the role of shock absorption when the moving iron core and the static iron core contact, the abrasion is reduced, and the service life is increased At the same time, the sealing gasket enhances the sealing between the moving iron core and the static iron core; the ring groove on the outer wall of the moving iron core reduces the friction between the moving iron core and the sleeve when it acts, and improves the sensitivity.
The pilot head of the solenoid valve includes the base 1 and the pilot head assembly, the pilot head assembly includes the sleeve 2, the moving iron core 3, the static iron core 4 and the electromagnetic coil 5, the moving iron core 3 and the static iron core 4 are arranged in the sleeve 2, the electromagnetic coil 5 is arranged on the outer wall of the sleeve 2, the first reset spring 6 is arranged between the moving iron core 3 and the sleeve 2, the end of the sleeve 2 is fixedly arranged on the base 1, the cavity 7 is formed between the sleeve 2 and the base 1, the moving iron core 3 and the static iron core 4 are arranged in the sleeve 2, the magnetic coil The iron core 3 is movably arranged in the chamber 7, the base 1 is provided with an air inlet 11 and a gas guide 12, the air inlet 11 and the gas guide 12 are all connected with the chamber 7, the static iron core 4 is provided with an air outlet 41, the air outlet 41 and the gas guide 12 are respectively arranged in coordination with the two ends of the moving iron core 3, the moving iron core 3 is provided with an air outlet 31 for the air inlet 11 and the air outlet 41, the base 1 is internally provided with a second convex block 13, and the air guide 12 The inlet end penetrates the second bump 13 axially, the bottom of the static iron core 4 is convex with the first bump 42, and the inlet end of the outlet 41 penetrates the first bump 42 axially; the top of the dynamic iron core 3 is equipped with the first plug 32 which is sealed and matched with the first bump 42; the bottom of the dynamic iron core 3 is equipped with the second plug 33 which is sealed and matched with the second bump 13; the bottom of the static iron core 4 is also equipped with the sealing washer 8 which is fixed It is arranged on the static iron core 4, and the outer wall of the moving iron core 3 is provided with a ring groove 35.
When the solenoid 5 is not energized, the second plug 33 is opposed to the second bump 13, so that the air vent 12 is in a closed state. At this time, the air inlet 11 is connected with the air outlet 41 through the exhaust channel 31; when the solenoid 5 is energized, the static iron core 4 generates suction to drive the moving iron core 3 up, so that the first plug 32 is opposed to the first bump 42, so that the air outlet 41 is in a closed state, and the air inlet 11 is connected with the air inlet 41 The hole 12 is connected; when the electromagnetic coil 5 is powered off, the moving iron core 3 is reset due to the elastic force of the first return spring 6, and the second plug 33 and the second bump 13 are offset again, so that the expiration hole is closed again.
Through the cooperation of the first plug 32 with the first boss 42 and the second plug 33 with the second boss 13, the impact of the dynamic iron core 3 on the base 1 and the static iron core 4 is reduced when the dynamic iron core 3 frequently acts. At the same time, the sealing washer 8 arranged on the static iron core 4 plays a role of shock absorption when the dynamic iron core 3 contacts the static iron core 4, reducing wear, and the sealing washer 8 enhances the sealing between the dynamic iron core 3 and the static iron core 4 The ring groove 35 on the outer wall of the moving core 3 reduces the action of the moving core 3
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