CN211288937U

CN211288937U - Electromagnetic valve for preventing medium from flowing back

Info

Publication number: CN211288937U
Application number: CN201922063872.3U
Authority: CN
Inventors: 管慧军
Original assignee: Heyida Aviation Technology Suzhou Co ltd
Current assignee: Heyida Aviation Technology Suzhou Co ltd
Priority date: 2019-11-26
Filing date: 2019-11-26
Publication date: 2020-08-18
Anticipated expiration: 2029-11-26

Abstract

The utility model relates to a solenoid valve for preventing medium backflow, which comprises an electromagnetic component and a valve body component, wherein the electromagnetic component comprises a shell, a coil and a movable iron core, the coil is arranged in the shell, the movable iron core is connected with the coil in a sliding way, the movable iron core is arranged in the coil, the coil is electrically connected with an external power supply, the valve body component comprises a connecting rod, a valve body and a non-return piston, the upper end and the lower end of the connecting rod are respectively and fixedly connected with the movable iron core and the non-return piston, the valve body is fixedly connected with the shell, the valve body is arranged below the shell, the non-return piston is connected with the valve body in a sliding way, a main valve opening is arranged in the valve body, the main valve opening is arranged above the non-return piston, the structure is simple, the design is reasonable, and the, the sealing effect of the electromagnetic valve backflow prevention structure and the opening and closing process is guaranteed.

Description

Electromagnetic valve for preventing medium from flowing back

Technical Field

The utility model relates to a prevent solenoid valve of medium backward flow belongs to solenoid valve technical field.

Background

The electromagnetic valve is an industrial device controlled by electromagnetism, is an automatic basic element for controlling fluid, belongs to an actuator, is not limited to hydraulic pressure and pneumatic pressure, is used in an industrial control system for adjusting the direction, flow, speed and other parameters of a medium, can be matched with different circuits to realize expected control, and can ensure the control precision and flexibility.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technical problem who solves overcomes current defect, the utility model provides a prevent solenoid valve of medium backward flow, through setting up the non return piston, can guarantee the normal circulation of medium, can avoid the medium backward flow simultaneously, through setting up seal structure, can seal between connecting rod and the valve body, avoid getting into in the electromagnetic component through the gap when the medium flows, cause the valve body to damage, through setting up the anti-return structure, can prevent the backward flow in the exit, effectually provide the backward flow sealed for the solenoid valve, thereby guarantee to prevent the effect of medium backward flow, can effectively solve the problem in the background art.

In order to solve the technical problem, the utility model provides a following technical scheme:

a solenoid valve for preventing medium backflow comprises an electromagnetic assembly and a valve body assembly, wherein the electromagnetic assembly comprises a shell, a coil and a movable iron core, the coil is installed inside the shell, the movable iron core is connected with the coil in a sliding manner, the movable iron core is located inside the coil, the coil is electrically connected with an external power supply, the valve body assembly comprises a connecting rod, a valve body and a non-return piston, the upper end and the lower end of the connecting rod are fixedly connected with the movable iron core and the non-return piston respectively, the valve body is fixedly connected with the shell, the valve body is located below the shell, the non-return piston is connected with the valve body in a sliding manner, a main valve opening is formed in the valve body and located above the non-return piston, a sealing structure is further arranged between the connecting rod and the valve body, and an inlet and an outlet are further formed in two sides, and a backflow prevention structure is arranged in the outlet.

Further, the bottom end of the movable iron core and the bottom of the check piston are both provided with a telescopic spring, and the two ends of the telescopic spring are respectively connected with the movable iron core, the check piston and the valve body.

Further, the top of the check piston is matched with the main valve port, and a guide sliding block is further arranged between the check piston and the valve body.

Further, the sealing structure comprises symmetrically arranged sealing grooves, the connecting rods are arranged in the sealing grooves, and sealing rings are arranged in the sealing grooves.

Furthermore, the sealing ring is fixedly connected with the connecting rod, and the distance between the sealing ring and the opposite side of the sealing groove is the same.

Further, backflow prevention structure includes the mount, just mount and export fixed connection, sliding connection has the guide bar on the mount, guide bar outside cover is equipped with supporting spring, backflow prevention stopper is installed to the guide bar right-hand member, just supporting spring connects mount and backflow prevention stopper in both ends.

The utility model discloses beneficial effect:

1. by arranging the check piston, the normal circulation of the medium can be ensured, and the medium can be prevented from flowing back;

2. by arranging the sealing structure, the connection rod and the valve body can be sealed, and the valve body is prevented from being damaged due to the fact that a medium enters the electromagnetic assembly through a gap when flowing;

3. through setting up anti-return structure, can prevent the backward flow in the exit, effectually provide the backward flow for the solenoid valve and seal to the effect of medium backward flow is prevented in the assurance.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention.

Fig. 1 is a cross-sectional view of a solenoid valve for preventing backflow of a medium according to the present invention.

Fig. 2 is a structural diagram of the sealing structure of the solenoid valve for preventing medium from flowing back.

Fig. 3 is a structural diagram of the electromagnetic valve backflow prevention structure for preventing medium backflow.

Reference numbers in the figures: 1. an electromagnetic assembly; 2. a valve body assembly; 3. a housing; 4. a coil; 5. a movable iron core; 6. a connecting rod; 7. a valve body; 8. a check piston; 9. a main valve port; 10. a sealing structure; 11. an inlet; 12. an outlet; 13. a backflow prevention structure; 14. a tension spring; 15. a sealing groove; 16. a seal ring; 17. a fixed mount; 18. a guide bar; 19. a support spring; 20. and (4) a backflow prevention plug.

Detailed Description

The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are presented herein only to illustrate and explain the present invention, and not to limit the present invention.

As shown in fig. 1-3, an electromagnetic valve for preventing medium backflow comprises an electromagnetic assembly 1 and a valve body assembly 2, wherein the electromagnetic assembly 1 comprises a housing 3, a coil 4 and a movable iron core 5, the coil 4 is installed inside the housing 3, the movable iron core 5 is slidably connected to the coil 4, the movable iron core 5 is located inside the coil 4, the coil 4 is electrically connected to an external power source, the valve body assembly 2 comprises a connecting rod 6, a valve body 7 and a non-return piston 8, the upper end and the lower end of the connecting rod 6 are respectively fixedly connected to the movable iron core 5 and the non-return piston 8, so that the normal circulation of a medium can be ensured, and the medium backflow can be avoided, the valve body 7 is fixedly connected to the housing 3, the valve body 7 is located below the housing 3, and the non-return piston 8 is slidably connected to the valve body 7, main valve mouth 9 has been seted up to the inside of valve body 7, main valve mouth 9 is located the top of non return piston 8, still be equipped with seal structure 10 between connecting rod 6 and the valve body 7, can seal between connecting rod 6 and the valve body 7, avoid getting into in the electromagnetic component 1 through the gap when the medium flows, cause the valve body to damage, valve body 7 both sides still are provided with import 11 and export 12, install backflow prevention structure 13 in the export 12, can prevent the backward flow in export 12 department, effectually provide the backward flow for the solenoid valve and seal to the effect of medium backward flow is prevented in the assurance.

More specifically, the bottom end of the movable iron core 5 and the bottom of the check piston 8 are both provided with a telescopic spring 14, both ends of the telescopic spring 14 are respectively connected with the movable iron core 5, the check piston 8 and the valve body 7, the top of the check piston 8 is matched with the main valve port 9, a guide slider is further arranged between the check piston 8 and the valve body 7, the sealing structure 10 comprises a sealing groove 15 which is symmetrically arranged, the connecting rod 6 is arranged in the sealing groove 15, a sealing ring 16 is arranged in the sealing groove 15, the sealing ring 16 is fixedly connected with the connecting rod 6, the distances between the sealing ring 16 and the opposite side of the sealing groove 15 are the same, the backflow preventing structure 13 comprises a fixing frame 17, the fixing frame 17 is fixedly connected with the outlet 12, a guide rod 18 is slidably connected onto the fixing frame 17, and a support spring 19 is sleeved outside the guide, an anti-return plug 20 is installed at the right end of the guide rod 18, and two ends of the supporting spring 19 are connected with the fixing frame 17 and the anti-return plug 20.

The utility model discloses the theory of operation: when the electromagnetic valve is opened, the coil 4 is electrified, the movable iron core 5 drives the check piston 8 to move downwards, the medium enters through the inlet 11, flows through the side face of the check piston 8 and is output through the outlet 12, and the supporting spring 19 pushes the anti-backflow plug 20 to plug the outlet 12 when the medium flows back, so that backflow is prevented, and the backflow prevention effect is improved.

The above is the preferred embodiment of the present invention, and the technical personnel in the field of the present invention can also change and modify the above embodiment, therefore, the present invention is not limited to the above specific embodiment, and any obvious improvement, replacement or modification made by the technical personnel in the field on the basis of the present invention all belong to the protection scope of the present invention.

Claims

1. The electromagnetic valve for preventing medium backflow comprises an electromagnetic assembly (1) and a valve body assembly (2), and is characterized in that the electromagnetic assembly (1) comprises a shell (3), a coil (4) and a movable iron core (5), the coil (4) is installed inside the shell (3), the movable iron core (5) is connected to the coil (4) in a sliding mode, the movable iron core (5) is located inside the coil (4), the coil (4) is electrically connected with an external power supply, the valve body assembly (2) comprises a connecting rod (6), a valve body (7) and a check piston (8), the upper end and the lower end of the connecting rod (6) are fixedly connected to the movable iron core (5) and the check piston (8) respectively, the valve body (7) is fixedly connected to the shell (3), and the valve body (7) is located below the shell (3), non return piston (8) sliding connection in valve body (7), main valve mouth (9) have been seted up to the inside of valve body (7), main valve mouth (9) are located the top of non return piston (8), still be equipped with seal structure (10) between connecting rod (6) and valve body (7), valve body (7) both sides still are provided with import (11) and export (12), install backflow prevention structure (13) in export (12).

2. A solenoid valve for preventing a medium from flowing backward according to claim 1, wherein: the bottom end of the movable iron core (5) and the bottom of the check piston (8) are both provided with an expansion spring (14), and the two ends of the expansion spring (14) are respectively connected with the movable iron core (5), the check piston (8) and the valve body (7).

3. A solenoid valve for preventing a medium from flowing backward according to claim 1, wherein: the top of the check piston (8) is matched with the main valve port (9), and a guide sliding block is further arranged between the check piston (8) and the valve body (7).

4. A solenoid valve for preventing a medium from flowing backward according to claim 1, wherein: the sealing structure (10) comprises symmetrically arranged sealing grooves (15), the connecting rod (6) is arranged in the sealing grooves (15), and sealing rings (16) are arranged in the sealing grooves (15).

5. The solenoid valve for preventing the backflow of a medium according to claim 4, wherein: the sealing ring (16) is fixedly connected with the connecting rod (6), and the distance between the sealing ring (16) and the opposite side of the sealing groove (15) is the same.

6. A solenoid valve for preventing a medium from flowing backward according to claim 1, wherein: anti-return structure (13) are including mount (17), just mount (17) and export (12) fixed connection, sliding connection has guide bar (18) on mount (17), guide bar (18) outside cover is equipped with supporting spring (19), anti-return stopper (20) are installed to guide bar (18) right-hand member, just mount (17) and anti-return stopper (20) are connected at supporting spring (19) both ends.