A sealing component installation structure, a moving iron structure and a solenoid valve

Abstract

The present invention relates to the field of electromagnetic valves, and discloses a seal installation structure, a moving iron structure and an electromagnetic valve, wherein the seal installation structure includes a seal installation frame and a seal installed on the seal installation frame, the seal includes a sealing surface and a bottom surface arranged opposite to the sealing surface, an opening is arranged on the seal installation frame corresponding to the bottom surface, and the seal can be extruded in the direction of the opening after swelling. The present invention provides an escape opening at the bottom of the seal installation frame, so that the central part of the tail end of the seal is not subjected to force, and when the seal swells, the enlarged part of the seal can be extruded toward the opening of the seal installation frame, so that the stress of the seal is released, thereby ensuring that the position of the seal between the seal position and the sealing position remains unchanged during sealing, and reducing the failure risk of the electromagnetic valve.

Description

Technical Field

[0001] The invention relates to the field of electromagnetic valves, and in particular to an electromagnetic valve which can work normally even if a sealing component swells. Background Art

[0002] The solenoid valve is a basic automation component used for fluid control. Its function is to realize the opening and closing of the flow channel through electrical signals. Its working principle is to convert electrical signals into mechanical force through power elements including coils, and control the movement or rotation of seals through mechanical force to realize the opening and sealing of the flow channel.

[0003] The solenoid valves currently used in the market all install or combine seals in a semi-closed manner. The seals will come into contact with the transmission medium, so there is a risk of swelling of the seals in actual work. Swelling of the seals will cause sealing failure, and then cause the solenoid valve to lose its function. Summary of the invention

[0004] In order to overcome the deficiencies of the prior art, the present invention provides a sealing component installation structure for solving the problem that the sealing component in the prior art is prone to cause sealing failure of the solenoid valve after swelling.

[0005] The technical solution adopted by the present invention to solve its technical problem is:

[0006] A seal installation structure includes a seal installation frame and a seal installed on the seal installation frame, the seal includes a sealing surface and a bottom surface arranged opposite to the sealing surface, an opening is arranged on the seal installation frame corresponding to the bottom surface, and the seal can be squeezed out in the direction of the opening after swelling.

[0007] As a further improvement of the above scheme, a groove for accommodating the seal is provided on the seal mounting frame, the tail end of the seal with a bottom surface is installed in the groove, the head end with a sealing surface extends from the groove, and the opening is provided at the bottom of the groove.

[0008] A moving iron structure comprises a moving iron and a sealing component installation structure fixed on the moving iron.

[0009] As a further improvement of the above scheme, the interior of the moving iron is axially provided with a first cavity and a second cavity which are interconnected, the diameter of the first cavity is smaller than that of the second cavity, the diameter of the head end of the seal is smaller than the diameter of the tail end, the tail end of the seal is located in the second cavity, and the head end of the seal is located in the first cavity, and the step surface between the head end and the tail end is abutted against the step surface between the first cavity and the second cavity.

[0010] As a further improvement of the above solution, it also includes a first elastic member, which is arranged in the second cavity and abuts against the rear end of the sealing member mounting frame.

[0011] A solenoid valve comprises a valve body, a power component and a second elastic component, wherein the valve body is provided with an accommodation space, and a first flow channel, a second flow channel and a third flow channel respectively connected to the accommodation space, and further comprises a moving iron structure, wherein a sealing member mounting structure is fixed to the head end of the moving iron, and a tail end sealing member is also fixed to the tail end of the moving iron;

[0012] The moving iron structure is arranged in the accommodating space and can reciprocate under the driving of the power component and the second elastic member, thereby closing the first flow channel or the second flow channel;

[0013] The direction of the force applied to the seal during sealing is the same as the extrusion direction of the seal.

[0014] As a further improvement of the above solution, it also includes a tail end seal mounting frame, the tail end seal is fixed on the tail end seal mounting frame, the tail end seal mounting frame is fixed on the moving iron and abuts against the first elastic member.

[0015] As a further improvement of the above scheme, the tail end seal mounting frame includes a plug-in portion and a connecting portion with a diameter larger than the plug-in portion. The plug-in portion is plugged into the second cavity of the moving iron. The step surface between the plug-in portion and the connecting portion is abutted against the end surface of the moving iron. The two ends of the second elastic member are respectively fixedly connected to the valve body and the connecting portion.

[0016] As a further improvement of the above scheme, a first through hole and a second through hole which are interconnected are provided on the tail end seal mounting frame, the diameter of the first through hole is smaller than that of the second through hole, the head end of the tail end seal is smaller than its tail end, the head end of the tail end seal is inserted into the first through hole, and the tail end of the tail end seal is inserted into the second through hole.

[0017] A solenoid valve includes a valve body, a power component and a second elastic component. The valve body is provided with a containing space and a flow channel connected to the containing space. The valve body also includes a moving iron structure. The moving iron structure is arranged in the containing space and can reciprocate under the drive of the power component and the second elastic component, thereby opening / closing the flow channel. The direction of the force applied to the seal during sealing is the same as the extrusion direction of the seal.

[0018] The beneficial effects of the present invention are:

[0019] The present invention provides an avoidance opening at the bottom of the seal mounting frame so that the central part of the tail end of the seal is not subjected to stress. When the seal swells, the enlarged part of the seal can be squeezed out toward the opening of the seal mounting frame, so that the stress of the seal is released, thereby ensuring that the position of the seal remains unchanged relative to the sealing position during sealing, thereby reducing the failure risk of the solenoid valve.

[0020] In addition, the present invention provides a sealing member mounting frame so that there is no direct contact between the elastic member and the sealing member, thereby avoiding extrusion and deformation of the sealing member caused by the elastic member. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0022] Figure 1 is a cross-sectional view of an embodiment of the sealing member installation structure of the present invention;

[0023] Figure 2 is a cross-sectional view of an embodiment of the moving iron structure of the present invention;

[0024] Figure 3 It is a cross-sectional view of an embodiment of a solenoid valve of the present invention. DETAILED DESCRIPTION

[0025] The following will be combined with the embodiments and drawings to clearly and completely describe the concept, specific structure and technical effects of the present invention, so as to fully understand the purpose, scheme and effect of the present invention. It should be noted that the embodiments and features in the embodiments of this application can be combined with each other without conflict.

[0026] It should be noted that, unless otherwise specified, when a feature is referred to as being "fixed" or "connected" to another feature, it may be directly fixed or connected to the other feature, or it may be indirectly fixed or connected to the other feature. In addition, the descriptions of up, down, left, right, front, back, etc. used in the present invention are only relative to the relative positional relationship of the components of the present invention in the drawings.

[0027] In addition, unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art. The terms used in this specification are only for describing specific embodiments, not for limiting the present invention. The term "and / or" used herein includes any combination of one or more related listed items.

[0028] Reference Figure 1 , shows a cross-sectional view of an embodiment of the seal installation structure of the present invention. As shown in the figure, the seal installation structure includes a seal installation frame 11 and a seal 12 installed on the seal installation frame 11.

[0029] The sealing member 12 in this embodiment is preferably a diaphragm structure, which is axially provided with a head end and a tail end, wherein the diameter of the head end is smaller than the diameter of the tail end, wherein a sealing surface 121 is provided on the head end, and a bottom surface 122 is provided on the side of the tail end opposite to the sealing surface 121.

[0030] The seal mounting frame 11 is preferably provided with a groove for accommodating the seal 12, the tail end of the seal 12 is installed in the groove, and the head end extends out of the groove. An opening 111 is provided at the bottom of the groove, which can be used as a storage space. When the seal 12 swells and deforms, the expanded part can be squeezed out in the direction of the opening.

[0031] Reference Figure 2 , shows a cross-sectional view of an embodiment of the moving iron structure of the present invention. As shown in the figure, the moving iron structure includes a moving iron 21 and a sealing member mounting structure 1 fixed on the moving iron.

[0032] As a preferred installation method of the seal installation structure 1 and the moving iron 21, the moving iron 21 is provided with a first cavity 211 and a second cavity 212 that are interconnected along the axial direction, and the diameter of the first cavity 211 is smaller than that of the second cavity 212. The head end of the seal 12 is located in the first cavity 211, and the tail end is located in the second cavity 212 together with the seal installation frame 11, and the step surface between the head end and the tail end of the seal 12 abuts against the step surface between the first cavity 211 and the second cavity 212.

[0033] In order to achieve the close contact between the two step surfaces, the movable iron structure further includes a first elastic member 22, which is preferably a spring, which is disposed in the second cavity 212 and contacts the tail end of the seal mounting bracket 11. The spring in the prior art directly contacts the seal, and after being compressed, the spring will exert a force on the seal to protrude outward, so that the seal swells and deforms and protrudes toward the valve body, resulting in failure of the seal between the seal and the valve body.

[0034] Preferably, a tail end seal assembly is also installed at the other end of the moving iron 21, and the tail end seal assembly includes a tail end seal 23 and a tail end seal mounting frame 24, wherein the tail end seal mounting frame 24 includes a plug-in portion 241, and a connecting portion 242 with a diameter larger than the plug-in portion 241, the plug-in portion 241 is plugged into the second cavity 212 of the moving iron 21, and abuts against the other end of the first elastic member 22, and the step surface between the plug-in portion 241 and the connecting portion 242 abuts against the lower end surface of the moving iron 21.

[0035] The tail end seal mounting frame 24 is provided with a first through hole and a second through hole which are interconnected. The diameter of the first through hole is smaller than that of the second through hole. The head end 231 of the tail end seal 23 is smaller than its tail end 232. The head end 231 of the tail end seal 23 is inserted into the first through hole, and the tail end 232 of the tail end seal 23 is inserted into the second through hole. The first through hole can also be used as a buffer area to accommodate the deformation of the tail end seal 23.

[0036] Reference Figure 3 , shows a cross-sectional view of an embodiment of the electromagnetic valve of the present invention. As shown in the figure, the electromagnetic valve includes a valve body 3, a power component 4 and a second elastic component 5.

[0037] The valve body 3 comprises a first valve seat 31 and a second valve seat 32 which are sealed and connected to form a receiving space 301. The first valve seat 31 is provided with a first flow channel 311 and a third flow channel 312 which are connected to the receiving space 301 respectively.

[0038] The power component 4 includes a stopper iron 41 and a coil 42. The stopper iron 41 is fixed on the second valve seat 32 and is provided with a second flow channel 411 communicating with the accommodating space 301. The first flow channel 311 and the second flow channel 411 are respectively located at two ends of the accommodating space 301 and remain coaxial.

[0039] The moving iron structure 2 is arranged in the accommodating space 301, the sealing installation structure 1 faces the second flow channel 411, and the tail end sealing assembly faces the first flow channel 311. The second elastic member 5 is preferably a spring, and its two ends are fixedly connected to the valve body and the connecting part 242 respectively. In the initial state, the second elastic member 5 presses the tail end seal 23 on the tail end sealing assembly at the opening of the first flow channel 311, the first flow channel 311 is in a closed state, and the second flow channel 411 is connected to the third flow channel 312; when the coil 42 is energized, the stop iron 41 acquires magnetism and attracts the moving iron structure 2 to move upward until the seal 12 presses the opening of the second flow channel 411. At this time, the first flow channel 311 is in an open state, the second flow channel 411 is in a closed state, and the first flow channel 311 is connected to the third flow channel 312, that is, the solenoid valve in this embodiment can realize the switching of the flow channel.

[0040] Since the bottom of the seal mounting frame 11 is provided with an opening 111 for escape, the center part of the tail end of the seal 12 is not subjected to stress. When the seal 12 swells, the volume of the seal 12 increases. Since the head end of the seal 12 is supported by the stop iron 41, the enlarged part of the seal 12 will be squeezed toward the opening of the seal mounting frame 11, that is, the stress of the seal 12 can be released, thereby ensuring that the position of the seal 12 relative to the stop iron 41 remains unchanged, reducing the failure risk of the solenoid valve.

[0041] The present invention also discloses another embodiment of the solenoid valve. In this embodiment, the solenoid valve is provided with only two flow channels. The two flow channels (the two flow channels can be regarded as two sections of one flow channel) are respectively connected to the accommodating space, and the fluid flows into the accommodating space from one of the flow channels, and then flows out from the other flow channel. The moving iron structure 2 is arranged in the accommodating space. In the initial state, the moving iron structure 2 closes one of the above-mentioned flow channels, and the solenoid valve is in an open-circuit state. After the coil is energized, the moving iron structure 2 is attracted by the stop iron to open the flow channel, and the solenoid valve is in an open-circuit state; or the solenoid valve is in an open-circuit state in the initial state. After the coil is energized, the moving iron structure 2 closes one of the above-mentioned flow channels, and the solenoid valve is in an open-circuit state. In this embodiment, since only one sealing position is required on the moving iron structure 2, it is only necessary to set the above-mentioned sealing component installation structure at one end of the moving iron 21.

[0042] The above is a specific description of the preferred implementation of the present invention, but the invention is not limited to the embodiments. Those skilled in the art may make various equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A moving iron structure, characterized in that: It includes a moving iron, a sealing member mounting structure fixed on the moving iron, and a first elastic member; The seal installation structure comprises a seal installation frame and a seal installed on the seal installation frame, the seal comprises a sealing surface and a bottom surface arranged opposite to the sealing surface, the seal installation frame is provided with an opening corresponding to the bottom surface, and the seal can be extruded in the direction of the opening after swelling; the seal installation frame is provided with a groove for accommodating the seal, the tail end of the seal provided with the bottom surface is installed in the groove, the head end provided with the sealing surface extends out of the groove, and the opening is provided at the bottom of the groove; The movable iron has a first cavity and a second cavity connected to each other axially inside, the diameter of the first cavity is smaller than that of the second cavity, the sealing member is a diaphragm structure, the diaphragm structure has a head end and a tail end axially, the diameter of the head end of the sealing member is smaller than the diameter of the tail end, the tail end of the sealing member is located in the second cavity, the head end of the sealing member is located in the first cavity, and the step surface between the head end and the tail end abuts against the step surface between the first cavity and the second cavity; The first elastic member is disposed in the second cavity and abuts against the rear end of the sealing member mounting frame.

2. A solenoid valve, comprising a valve body, a power component and a second elastic member, wherein the valve body is provided with a receiving space, and a first flow channel, a second flow channel and a third flow channel respectively connected to the receiving space, characterized in that: It also includes the moving iron structure of claim 1, wherein the sealing member mounting structure is fixed to the head end of the moving iron, and a tail end sealing member is also fixed to the tail end of the moving iron; The moving iron structure is disposed in the accommodating space and can reciprocate under the driving of the power component and the second elastic member, thereby closing the first flow channel or the second flow channel; The direction of the force applied to the sealing member during sealing is the same as the extrusion direction of the sealing member.

3. The solenoid valve according to claim 2, characterized in that: It also includes a tail end seal mounting frame, the tail end seal is fixed on the tail end seal mounting frame, the tail end seal mounting frame is fixed on the moving iron and abuts against the first elastic member.

4. The solenoid valve according to claim 3, characterized in that: The tail end seal mounting frame includes a plug-in portion and a connecting portion with a diameter larger than the plug-in portion, the plug-in portion is plugged into the second cavity of the moving iron, the step surface between the plug-in portion and the connecting portion is abutted against the end surface of the moving iron, and the two ends of the second elastic member are fixedly connected to the valve body and the connecting portion respectively.

5. The solenoid valve according to claim 3 or 4, characterized in that: The tail end seal mounting frame is provided with a first through hole and a second through hole which are interconnected, the diameter of the first through hole is smaller than that of the second through hole, the head end of the tail end seal is smaller than its tail end, the head end of the tail end seal is inserted into the first through hole, and the tail end of the tail end seal is inserted into the second through hole.

6. A solenoid valve, comprising a valve body, a power component and a second elastic component, wherein the valve body is provided with a containing space and a flow channel communicating with the containing space, characterized in that: It also includes the moving iron structure described in claim 1, which is arranged in the accommodating space and can reciprocate under the drive of the power component and the second elastic component to open / close the flow channel, and the direction of the force applied to the seal during sealing is the same as the extrusion direction of the seal.

Images