CN201818877U - Gas Solenoid Valve - Google Patents

Abstract

The utility model discloses a gas solenoid valve which comprises a valve body and a valve core, wherein, the valve core is axially arranged in the inner cavity of the valve body in a sliding manner along the valve body; the front end of the valve body is equipped with a gas inlet pipeline, and the rear end of the valve body is detachably and fixedly connected with a gas outlet joint; the gas outlet joint is equipped with a gas outlet pipeline; a gas inlet of the gas outlet pipeline is arranged on a projection which extends outwards on the front end surface of the gas outlet joint; the valve core is equipped with a gas guide pipeline for communicating the gas inlet pipeline with the gas outlet pipeline; the rear end of the valve core is equipped with a sealing element for plugging the raised gas inlet; a mounting hole which axially extends along the valve body is arranged in the front of the valve core inside the valve body, and the mounting hole is internally provided with a compression spring for pushing the valve core to close the solenoid valve; the rear end surface of the compression spring props against the front end surface of the valve core; an electromagnetic coil which is used for generating an electromagnetic force so as to push the valve core to open the solenoid valve is wound at the position on the external surface of the valve body corresponding to the valve core; and a magnetic separation ring is arranged between the electromagnetic coil and the valve body.

Description

Gas Solenoid Valve

technical field

The utility model belongs to the field of pneumatic control, in particular to a gas electromagnetic valve.

Background technique

With the continuous development of science and technology, the application range and fields of high-pressure gas source systems are becoming more and more extensive, and higher requirements are put forward for the performance of high-pressure gas source systems. With the continuous increase of the working pressure of the high-pressure gas source system, the working pressure of some high-pressure gas source systems has reached 70MPa. As an important control component in the high-pressure gas source system, the gas solenoid valve has continuously increased its working pressure requirements. The volume weight is also developing in the direction of miniaturization and light weight. At present, gas solenoid valves higher than 35MPa in the domestic market basically rely on imports, and there are few such products abroad, and this type of solenoid valve has a large shape and heavy weight, which is difficult to meet the market's demand for miniaturization and light weight. requirements.

Utility model content

The purpose of the utility model is to provide a gas solenoid valve with simple structure, small shape and reliable sealing.

In order to achieve the above purpose, the utility model adopts the following technical scheme: a gas solenoid valve, including a valve body and a valve core slidingly assembled in the inner cavity of the valve body along the axial direction of the valve body, an air inlet pipeline is arranged at the front end of the valve body, and The end is detachably connected with an air outlet joint, and the air outlet joint is provided with an air outlet pipeline. And the air guide line of the air outlet pipeline, the rear end of the valve core is provided with a seal for blocking the air inlet on the protrusion. When the seal is blocked on the raised air inlet, the rear end of the valve core corresponds to The force-bearing area of the gas is smaller than the force-bearing area corresponding to the gas at the front end of the valve core. Inside the valve body, there is a mounting hole extending along the axial direction of the valve core in front of the valve core. The mounting hole is equipped with a device for pushing the valve core to close the solenoid valve. The compression spring of the valve, the rear end surface of the compression spring is pressed against the front end surface of the valve core, and the electromagnetic coil used to generate electromagnetic force to push the valve core to open the solenoid valve is wound on the outer surface of the valve body corresponding to the position of the valve core A magnetic isolation ring is arranged on the peripheral surface of the valve body between the electromagnetic coil and the valve body corresponding to the position of the valve core.

The sealing member on the valve core is installed in the cavity extending outward on the rear end surface of the valve core, and the rear end opening of the cavity is a constriction.

The valve body is an integrated structure. On the outer surface of the valve body corresponding to the valve core, there is an annular groove extending along the axial direction of the valve body for winding the electromagnetic coil. A filling ring groove extending axially along the valve body for placing the magnetic isolating ring is opened at the corresponding position of the bottom of the magnetic isolating ring.

The air inlet pipeline on the valve body and the air outlet pipeline on the air outlet joint all extend axially along the valve body, and the air inlet pipeline, the air outlet pipeline and the installation hole are all coaxial with the valve body, and the front end of the installation hole is aligned with the air inlet pipe. The air outlet of the road is communicated, and the rear end of the mounting hole is communicated with the air inlet of the air guide line on the valve core.

The outer peripheral surface of the front part of the valve core is in sealing fit with the inner cavity, the outer peripheral surface of the rear end of the valve core is in clearance fit with the inner cavity, and the air outlet of the air guiding pipeline of the valve core communicates with the gap between the valve core and the inner cavity of the valve core.

A filter screen is arranged at the air inlet of the air inlet pipeline of the valve body.

A casing surrounding the electromagnetic coil is fixed on the valve body outside the electromagnetic coil.

A sealing ring is arranged at the rear end of the valve body between the valve body and the gas outlet joint.

When using the gas solenoid valve of the present utility model, when there is no air in the air intake pipeline of the valve body, the compression spring pushes the valve core to slide axially along the valve body, leaving a gap between the front end of the valve core and the corresponding surface of the front end of the valve body cavity. There is a working magnetic gap, and the seal at the back end of the valve core is used to block the air inlet of the air outlet pipeline on the air outlet joint to achieve sealing. In middle mode, the force bearing area of the rear end of the valve core corresponding to the gas is smaller than the force bearing area of the front end of the valve core corresponding to the gas. At this time, the forces on the front and rear ends of the valve core are unequal and opposite, because the force on the front end is greater than that on the rear end , the valve core will be further pressed tightly on the air outlet joint, and the seal will continue to block the air inlet on the protrusion to ensure reliable sealing of the solenoid valve at high air pressure. When the electromagnetic valve needs to be opened, start the electromagnetic coil, and the electromagnetic coil exerts an electromagnetic force on the valve core. The electromagnetic force on the valve core overcomes the combined force of the compression spring and the high-pressure gas on the valve core to push the valve core to open, and the front end of the air outlet joint The air inlet on the protrusion is opened, and the high-pressure gas is conducted along the outlet pipeline on the outlet joint. At this time, the force-bearing areas of the front and rear ends of the valve core are equal, and the electromagnetic force exerted by the electromagnetic coil on the valve core only needs to overcome the pressure of the compression spring. The normal conduction of the gas circuit can be guaranteed. In the utility model, the electromagnetic force generated by the electromagnetic coil on the valve core enables the position and state of the valve core to be quickly and reliably controlled, thereby realizing the control of the high-pressure gas circuit. When the gas solenoid valve in the utility model is in use, when the air circuit is in a closed state, because the rear end of the valve core is closely attached to the protrusion of the gas outlet joint, the force-bearing area of the rear end of the valve core is smaller than that of the front end of the valve core. The area, the front end of the valve core is more stressed than the rear end of the valve core, the higher the gas pressure, the better the sealing performance of the entire gas solenoid valve.

Description of drawings

Fig. 1 is a schematic structural view of an embodiment of the utility model.

Detailed ways

As shown in Figure 1, the gas solenoid valve includes a valve body 3 with an integrated structure and a valve core 6 that is slidably assembled in the inner cavity of the valve body along the axial direction of the valve body. The air pipeline 10 is provided with a filter screen 13 for filtering impurities at the air inlet of the air intake pipeline 10, and the rear end of the valve body 3 is detachably connected with the air outlet joint 1 through threads, and the air outlet joint 1 is provided with a valve body 3 The axially extending air outlet pipeline 12 is provided with an outwardly extending protrusion 14 on the front end of the air outlet joint 1, wherein the air inlet of the air outlet pipeline 12 is set on the protrusion 14, and the valve core 6 is provided with a useful In the air guide line 11 connecting the intake line 10 and the air outlet line 12, the rear end of the valve core 6 is provided with a seal 4 for blocking the air inlet on the protrusion, and the seal 4 is installed on the valve core 6 In the cavity extending outwards on the rear end surface, the opening at the rear end of the cavity is a constriction, and the seal 4 and the valve core 6 are reliably connected into an integrated structure through the rolling closing process. When the seal 4 is blocked on the raised 14, the force-bearing area corresponding to the gas at the rear end of the spool is smaller than the force-bearing area corresponding to the gas at the front end of the spool, and a valve extending along the axial direction of the valve body is provided inside the valve body 3 in front of the valve core 6. The installation hole, the outer peripheral surface of the front part of the valve core 6 is in sealing fit with the inner cavity of the valve body 3, the outer peripheral surface of the rear end of the valve core 6 is in clearance fit with the inner cavity of the valve body 3, and the air outlet of the air guide line 11 of the valve core 6 is in contact with the inner cavity of the valve core. It communicates with the gap between the inner cavity of the valve body. When the air path is connected, the high-pressure gas passes through the inlet line 10 at the front end of the valve body 3, the air guide line 11, the inner cavity of the valve body, and finally enters the outlet line 12 on the outlet joint 1. In this embodiment, the air intake pipeline, air outlet pipeline and installation hole are designed coaxially with the valve body, the front end of the installation hole communicates with the air outlet of the air intake pipeline, and the rear end of the installation hole communicates with the air guide pipeline on the valve core. The air inlet of the valve is connected, and the installation hole is equipped with a compression spring 8 for pushing the valve core to close the solenoid valve. Above, under the action of the compression spring 8, there is a working magnetic gap δ between the front end of the valve core 6 and the corresponding surface of the front end of the inner cavity of the valve body 3, and the position corresponding to the valve core 6 on the outer surface of the valve body 3 There is an annular groove extending axially along the valve body, and an electromagnetic coil 5 for generating electromagnetic force to push the valve core to move forward to open the solenoid valve is wound in the annular groove. The filling ring groove is extended along the axial direction of the valve body, and a magnetic isolation ring 7 is arranged between the electromagnetic coil and the valve body in the filling ring groove, and a shell for protecting the electromagnetic coil is fixed on the outside of the electromagnetic coil on the valve body 9.

The magnetic isolation ring in the above embodiment is arranged on the outer peripheral surface of the valve body. Although a filling ring groove is provided on the outer peripheral surface of the valve body, the magnetic isolation ring does not completely isolate the valve body, and the valve body is still an integrated structure. The strength of the valve body is high, and its airtightness is improved.

Because the gas outlet connector 1 is detachably connected to the rear end of the valve body 3 through threads, in order to improve the overall sealing performance of the gas solenoid valve, a sealing ring 2 is provided at the rear end of the valve body between the valve body 3 and the gas outlet connector 1. A stepped groove is arranged on the outer peripheral surface of the rear end of the air outlet joint, and a ring platform is arranged on the inner wall of the inner hole at the rear end of the valve body corresponding to the stepped groove. The combination of the stepped groove and the ring platform constitutes a sealing groove for placing a sealing ring.

The electromagnetic coil 5 is connected to the external DC power supply through the wire passing through the valve body. When the DC power supply is turned on, the electromagnetic coil generates an induced magnetic field, and the valve core moves forward under the action of the electromagnetic force to open the electromagnetic valve to ensure the conduction of the gas path. .

The material of the spool in the above embodiment can be made of electrical pure iron, which has good magnetic permeability, high saturation magnetic induction and low new words, and can obtain greater electromagnetic attraction than other materials.

The valve body is made of soft magnetic stainless steel with both magnetic properties and mechanical strength. The valve body is rust-proof through passivation, thereby improving the working pressure and corrosion resistance of the valve body.

In the utility model, the magnetic ring 7 is separated between the electromagnetic coil 5 and the valve body 3, and the valve body is not completely cut off. In this way, under the premise that the mechanical strength of the valve body is affected by killing, the work can be improved when the structural size is small. The magnetic flux density of the magnetic gap.

In the gas solenoid valve in the utility model, when the high-pressure gas circuit is not conducted, the compression spring 8 provides elastic force to the valve core 6 to press the sealing member 4 at the rear end of the valve core 6 onto the protrusion 14 on the front surface of the gas outlet joint 1, Complete the sealing of the gas circuit. When the air intake line 10 at the front end of the valve body 3 is filled with high-pressure gas, the high-pressure gas enters the inner cavity of the valve body through the air intake line 10 and the air guide line 11 on the valve core 6, because this When the rear end of the valve body is pressed against the protrusion on the front end of the air outlet joint, the force-bearing area of the rear end of the valve core 6 is smaller than the force-bearing area of the front end of the valve core, and the high-pressure gas will press the valve core 6 backwards. Move, continue to press on the protrusion 14 to seal the air outlet pipeline, keep the high-pressure sealing state of the solenoid valve, the higher the air pressure in the gas solenoid valve in the utility model, the better its sealing. When it is necessary to open the solenoid valve to conduct the air path, direct current is passed through the wire phase solenoid coil, and the valve core 6 moves forward after overcoming the combined force of the compression spring and high-pressure gas on the valve core under the action of electromagnetic force, and the rear end surface of the valve core 6 is separated The protrusion 14 on the front end surface of the air outlet joint, at this time, the air outlet pipeline 12 is conducted, and the high-pressure gas is conducted through the outlet pipeline 12 on the air outlet joint 1, because when the valve core is separated from the air outlet joint, the front and rear ends of the valve core The stressed area becomes equal again, so when the solenoid valve is normally conducted, the electromagnetic force only needs to overcome the elastic force of the compression spring to maintain the conduction of the solenoid valve.

Claims (8)

1. The gas solenoid valve is characterized in that: it includes a valve body and a valve core that is slid and assembled in the inner cavity of the valve body along the axial direction of the valve body, an air inlet pipeline is arranged at the front end of the valve body, and the rear end of the valve body is detachably connected with an air outlet Joint, the air outlet joint is provided with an air outlet pipeline, the air inlet of the air outlet pipeline is set on the protrusion extending outward on the front end of the air outlet joint, and the valve core is provided with an air guide tube for connecting the air intake pipeline and the air outlet pipeline The rear end of the spool is provided with a seal used to block the air inlet on the protrusion. When the seal is blocked on the raised air inlet, the force-bearing area of the rear end of the spool corresponding to the gas is smaller than that of the valve The front end of the core corresponds to the force-bearing area of the gas. Inside the valve body, there is a mounting hole extending along the axial direction of the valve core in front of the valve core. A compression spring for pushing the valve core to close the solenoid valve is installed in the mounting hole. The compression spring The rear end face of the valve core is pressed against the front end face of the valve core, and an electromagnetic coil for generating electromagnetic force to push the valve core to open the solenoid valve is wound on the outer surface of the valve body corresponding to the position of the valve core. A magnetic isolation ring is arranged between the electromagnetic coil and the valve body corresponding to the position of the valve core. 2. The gas solenoid valve according to claim 1, characterized in that: the seal on the valve core is installed in a cavity extending outward on the rear end surface of the valve core, and the rear end opening of the cavity is a constriction . 3. The gas solenoid valve according to claim 1 or 2, characterized in that: the valve body is an integrated structure, and on the outer surface of the valve body corresponding to the valve core, there is a The annular groove for winding the electromagnetic coil is provided on the valve body at the bottom of the annular groove and at the corresponding position of the magnetic isolation ring, and there is a filling annular groove extending along the valve body axial direction for placing the magnetic isolation ring. 4. The gas solenoid valve according to claim 1 or 2, characterized in that: the inlet pipeline on the valve body and the outlet pipeline on the outlet connector both extend axially along the valve body, and the inlet pipeline, outlet Both the air pipeline and the mounting hole are coaxial with the valve body, the front end of the mounting hole communicates with the air outlet of the air intake pipeline, and the rear end of the mounting hole communicates with the air inlet of the air guiding pipeline on the valve core. 5. The gas solenoid valve according to claim 1 or 2, characterized in that: the outer peripheral surface of the front part of the valve core is in sealing fit with the inner cavity, the outer peripheral surface of the rear end of the valve core is in clearance fit with the inner cavity, and the guide of the valve core The air outlet of the air pipeline communicates with the gap between the valve core and the inner chamber of the valve. 6. The gas solenoid valve according to claim 1 or 2, characterized in that: a filter screen is arranged at the air inlet of the air inlet pipeline of the valve body. 7. The gas solenoid valve according to claim 1 or 2, characterized in that: the valve body is fixed with a casing surrounding the solenoid coil on the outside of the solenoid coil. 8. The gas solenoid valve according to claim 1 or 2, characterized in that: a sealing ring is provided at the rear end of the valve body between the valve body and the gas outlet joint.

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