CN-224229250-U - Electromagnetic valve with reverse cut-off function

CN224229250UCN 224229250 UCN224229250 UCN 224229250UCN-224229250-U

Abstract

The utility model relates to the technical field of electromagnetic valves, in particular to an electromagnetic valve with a reverse cut-off function, which realizes a flow mode of forward opening and reverse closing through a valve core and improves the convenience of use; the valve seat comprises a valve seat, an air inlet, an air outlet, a valve cover assembly, a first sealing gasket, a movable iron core, a static iron core, a coil assembly, a fully-closed piston, a small valve needle, a large valve needle and a second sealing gasket, wherein the air inlet is arranged at the lower part of the outer side wall of the valve seat, the air outlet is arranged at the bottom end of the valve seat, a cavity is formed between the valve core and the valve cover assembly, the coil assembly is arranged on the valve cover assembly, the movable iron core and the static iron core are arranged in the coil assembly, a groove is formed in the bottom end of the movable iron core, the second sealing gasket is arranged on the groove in the bottom end of the movable iron core, and the small valve needle and the large valve needle are respectively matched and installed on the valve core.

Inventors

XIE YINFENG
WANG JUN
GUO JIANQIANG
Zhang shengda
LIU QIAN
PAN XIAOYONG

Assignees

宁波拓普集团股份有限公司

Dates

Publication Date: 20260512
Application Date: 20250513

Claims (5)

1. The electromagnetic valve with the reverse cut-off function comprises a valve seat (1), an air inlet is formed in the lower portion of the outer side wall of the valve seat (1), an air outlet is formed in the bottom end of the valve seat (1), a cavity is formed in the valve seat (1), and the electromagnetic valve is characterized by further comprising a valve core (2), a valve cover assembly (3), a first sealing gasket (4), a movable iron core (5), a static iron core (6), a coil assembly (7), a fully-closed piston (8), a small valve needle (9), a large valve needle (10) and a second sealing gasket (11), wherein the valve core (2) and the fully-closed piston (8) are arranged in the cavity, the valve cover assembly (3) is arranged at the top end of the valve seat (1), a cavity is formed between the valve core (2) and the valve cover assembly (3), the coil assembly (7) is arranged on the valve cover assembly (3), the movable iron core (5) and the static iron core (6) are arranged in the coil assembly (7), the bottom end of the movable iron core (5) is provided with a groove, and the second sealing gasket (11) is arranged on the groove at the bottom end of the movable iron core (5), and the small valve needle (9) and the large valve needle (10) are respectively matched and arranged on the valve core (2).
2. A solenoid valve with a reverse blocking function according to claim 1, characterized in that it further comprises a spring (12), the spring (12) being arranged on the outer side wall of the valve body (2), and the spring (12) being arranged inside the valve seat (1).
3. A solenoid valve with a reverse cut-off function according to claim 1, characterised in that the coil assembly (7) consists of a coil former, a coil winding, an injection-molded shell and a coil yoke, the coil former being sheathed with the coil winding, both being wrapped by the injection-molded shell, the injection-molded shell being externally provided with the coil yoke.
4. A solenoid valve with a reverse blocking function according to claim 3, characterised in that said static iron core (6) is fixed to the injection-moulded casing by means of a combination screw.
5. A solenoid valve with a reverse blocking function according to claim 1, characterized in that said valve cover assembly (3) is connected to the valve seat (1) by means of press-fit welding.

Description

Electromagnetic valve with reverse cut-off function Technical Field The utility model relates to the technical field of electromagnetic valves, in particular to an electromagnetic valve with a reverse cut-off function. Background In the key fields of industrial automation, energy transmission, water treatment, medical equipment and the like, an electromagnetic valve is used as a core executive element of a fluid pipeline and bears the tasks of medium on-off, flow regulation, direction control and the like. Along with industry upgrading to high safety, low energy consumption and high integration, the limitations of the traditional electromagnetic valve on reverse medium protection and dynamic control performance are increasingly prominent. The utility model discloses a combined electromagnetic valve, which comprises a valve seat, a piston, a valve cover assembly, a return spring, a movable iron core, a static iron core, a coil assembly and the like, wherein the electromagnetic valve is filled with air from a side hole of the valve seat, and the air is discharged from a hole at the lower end of the electromagnetic valve, as in the patent with the prior art authorized publication number CN216618710U, the combined electromagnetic valve comprises the valve seat, the top end of the valve seat is provided with an electromagnetic valve body, the inside of the electromagnetic valve body is provided with a valve rod, the top end of the valve seat is provided with a first connecting plate, the bottom end of the electromagnetic valve body is provided with a second connecting plate, one sides of the first connecting plate and one side of the second connecting plate are provided with threaded holes, the inside of the valve seat is respectively provided with a first flow passage and a second flow passage, and two sides of the valve seat are respectively provided with a flange plate. However, when the electromagnetic valve is used, the electromagnetic valve is inconvenient to realize the reverse cut-off function, and the use convenience is reduced. Disclosure of utility model In order to solve the technical problems, the utility model provides the electromagnetic valve with the reverse cut-off function, which realizes a flow mode of forward opening and reverse closing through the valve core and improves the convenience of use. The electromagnetic valve with the reverse cut-off function comprises a valve seat, wherein an air inlet is formed in the lower portion of the outer side wall of the valve seat, an air outlet is formed in the bottom end of the valve seat, and a cavity is formed in the valve seat; the valve further comprises a valve core, a valve cover assembly, a first sealing gasket, a movable iron core, a static iron core, a coil assembly, a fully-closed piston, a small valve needle, a large valve needle and a second sealing gasket, wherein the valve core and the fully-closed piston are arranged in a cavity, the valve cover assembly is arranged at the top end of a valve seat, a cavity is formed between the valve core and the valve cover assembly, the coil assembly is arranged on the valve cover assembly, a movable iron core and a static iron core are arranged in the coil assembly, a groove is formed in the bottom end of the movable iron core, a second sealing gasket is arranged on the groove in the bottom end of the movable iron core, and a small valve needle and a large valve needle are respectively matched and arranged on the valve core; under normal state, the first sealing gasket seals the air outlet of the valve seat, the second sealing gasket seals the upper port of the pressure relief hole at the top end of the valve core, when the valve core needs to be opened, the coil assembly is electrified to generate a magnetic field, so that the movable iron core moves upwards, the second sealing gasket is separated from the upper port of the pressure relief hole, the air pressure and the elastic force the valve core to move upwards, the first sealing gasket is separated from the air outlet, when the valve core is not needed to be used, the coil assembly is powered off, the movable iron core moves downwards, the second sealing gasket seals the upper port of the pressure relief hole, the movable iron core brings the valve core downwards together, the first sealing gasket seals the air outlet, the air outlet of the valve seat is in air inlet, the air inlet cannot give out air, the air enters from the bottom of the valve seat, the large valve needle is pressed upwards to seal the original air outlet, the air enters the valve seat from the long straight hole of the valve core, the air pushes the small valve needle upwards to circulate, the air enters the cavity between the valve cover assembly and the valve core, the air is sealed in the cavity, the valve core is always in a closed state through the difference of the upper and lower stress area, the valve core realizes a flow mode of forward opening and reverse closing. T