Valve element structure and electromagnetic valve

Abstract

The embodiment of the utility model discloses a valve element structure and an electromagnetic valve, and relates to the technical field of valve body structures. The valve element structure comprises a valve sleeve assembly, a static iron core, a sealing assembly and an actuating assembly. A valve port is formed in the valve sleeve assembly. The static iron core is located on the side away from the valve port. The sealing assembly comprises a sealing framework and a lining, and the sealing framework is in interference fit with the lining. The actuating assembly comprises an armature and a limiting sleeve, and the armature is located on the side close to the valve port. The limiting sleeve is matched with the surface of the side, away from the static iron core, of the armature to form a gap cavity. Part of the lining is located in the gap cavity, and the lining is in clearance fit with the armature. And in a power-off state, a buffer gap exists between the lining and the limiting sleeve. According to the valve element structure, through the buffer gap between the lining and the limiting sleeve, the armature does not need to overcome the air pressure at the first time when moving towards the static iron core, that is, the time period for overcoming the air pressure can be delayed, and then the valve element structure is easier to open under the atmospheric pressure difference.

Description

Technical Field

[0001] The utility model relates to the technical field of valve body structures, in particular to a valve core structure and a solenoid valve. Background Art

[0002] As the core component of the solenoid valve, the valve core structure is widely used in various hydraulic and pneumatic systems to control the on / off, direction and flow of the fluid.

[0003] In the related art, the working process of the valve core structure is as follows: when the valve port is opened, the moving iron core (i.e., the armature) is far away from the static iron core, and the initial electromagnetic force at this time is small. When the moving iron core moves toward the static iron core, it needs to overcome the spring preload, friction and air pressure during the movement. Therefore, it has the problem of slow response. In addition, Chinese patent CNCN117450273A discloses a solenoid valve core structure and a solenoid valve, but due to the structural characteristics of each part in its sealing assembly, it has the defect of complex structure. During the manufacturing process of the sealing assembly, it is easy to have difficulty in demolding, and there is a problem of high scrap rate. Summary of the invention

[0004] In view of the shortcomings of the above-mentioned prior art, the purpose of the utility model is to provide a valve core structure and a solenoid valve. The valve core structure can reserve a buffer gap between the bushing and the limit sleeve when the power is off, so that the armature does not need to overcome the air pressure for the first time when it moves toward the static iron core, that is, the time period for overcoming the air pressure is delayed, thereby making the valve core structure easier to open under the atmospheric pressure difference; at the same time, the sealing frame and the bushing in the sealing assembly are independent of each other, which has the advantages of simple processing and can reduce processing costs.

[0005] The utility model discloses a valve core structure, comprising:

[0006] The valve sleeve assembly is formed with a valve port for medium circulation;

[0007] A static iron core, located at a side away from the valve port;

[0008] A sealing assembly, comprising a sealing frame and a bushing, wherein the sealing frame and the bushing are interference fit;

[0009] The actuating assembly includes an armature, a magnetic circuit elastic member and a limit sleeve, wherein the armature is located on a side close to the valve port, and the magnetic circuit elastic member is located between the armature and the static iron core to push the armature away from the static iron core; the limit sleeve is fixedly connected to the armature, and the limit sleeve cooperates with a surface of the armature on a side away from the static iron core to form a gap chamber; a portion of the bushing is located in the gap chamber, and the bushing cooperates with the armature gap; when in a power-off state, there is a buffer gap between the bushing and the limit sleeve, and the sealing assembly abuts against the valve port; when in a power-on state, the limit sleeve moves with the armature to drive the sealing assembly to move in a direction away from the valve port.

[0010] Furthermore, the limit sleeve includes a radial portion and an axial portion, the axial portion is fixedly connected to the circumferential surface of the armature, when in a power-off state, there is a buffer gap between the radial portion and the sleeve, and when in a power-on state, the radial portion can abut against the sleeve to drive the sleeve and the sealing frame to move in a direction away from the valve port.

[0011] Furthermore, the sealing assembly also includes a sealing structure, which is partially covered by the sealing frame, and the sealing structure can abut against or move away from the valve port by following the movement of the sealing frame; the sealing structure and the bushing are independent of each other and do not contact each other.

[0012] Furthermore, the sealing frame includes an insert part and a mounting part which are coaxially arranged, the longitudinal section of the insert part is in an I-shape, the sealing structure is partially covered by the insert part, the mounting part is inserted into the through hole of the armature, and the bushing is interference fit with the mounting part.

[0013] Furthermore, the insert portion includes a fixed disk, a support section and an insert section. The fixed disk is a circular disk structure. Both ends of the support section are respectively connected to the fixed disk and the insert section. The sealing structure covers the support section and the insert section, and the sealing structure abuts against the fixed disk.

[0014] Furthermore, the valve sleeve assembly includes a valve sleeve body, a magnetic sleeve and a magnetic circuit connecting sleeve which are connected in sequence. A first valve port channel and a second valve port channel are provided through the central axis of the valve sleeve body. A valve port is formed at the bottom of the first valve port channel. The sealing assembly controls the connection between the first valve port channel and the second valve port channel by abutting against or moving away from the valve port.

[0015] Furthermore, the sealing assembly also includes a sealing elastic member, which is located in the second valve port channel, and two ends of the sealing elastic member are respectively in contact with the sealing frame and the inner recessed portion of the valve sleeve body.

[0016] Further, the spool structure further includes a limiting elastic member. A sinking groove is provided on the side of the static iron core facing the armature. The side of the armature facing the static iron core has a recess disposed opposite to the sinking groove. The two ends of the limiting elastic member respectively abut against the sinking groove and the recess, so as to limit the relative distance between the armature and the static iron core.

[0017] Further, the recess is a stepped hole structure. The end of the limiting elastic member away from the static iron core abuts against the large-diameter end face of the recess, and the end of the magnetic path elastic member away from the static iron core abuts against the small-diameter end face of the recess. The limiting elastic member is sleeved on the magnetic path elastic member.

[0018] Further, the limiting elastic member and the magnetic path elastic member are coaxially arranged.

[0019] An embodiment of the present invention also discloses a solenoid valve, including the spool structure as described above.

[0020] The spool structure and the solenoid valve provided by the present invention have the following beneficial effects, including but not limited to:

[0021] 1) When in a power-off state, the spool structure can reserve a buffer gap between the bushing and the limiting sleeve, so that when the armature moves towards the static iron core for the first time, it does not need to overcome the air pressure. That is, the time period for overcoming the air pressure is postponed, and thus the spool structure is easier to open under a large atmospheric pressure difference.

[0022] 2) The sealing skeleton of the spool structure is independent of the bushing, which has the advantages of simple processing and can reduce the processing cost. While retaining the original functions, it also has better manufacturability.

[0023] 3) The limiting elastic member of the spool structure can be installed in the sinking groove of the static iron core and the recess of the armature at the same time. Therefore, it can increase its own manufacturing length, making the processed dimensional structure easier to guarantee and control, and having higher fatigue durability performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] This specification will further illustrate in the form of exemplary embodiments, and these exemplary embodiments will be described in detail through the drawings. These embodiments are not restrictive. In these embodiments, the same numbers represent the same structures, where:

[0025] Figure 1 is a schematic structural diagram of the spool structure provided by an embodiment of the present invention;

[0026] Figure 2 is a cross-sectional view of the sealing assembly provided by an embodiment of the present invention;

[0027] Figure 3 is a cross-sectional view of the limiting sleeve provided by an embodiment of the present invention;

[0028] Figure 4 Cross-sectional view of the sealing skeleton provided by the embodiment of the present utility model.

[0029] Drawing number: 100 - spool structure;

[0030] 111 - valve sleeve body; 1111 - first valve port channel; 1112 - second valve port channel; 112 - magnetic sleeve; 113 - magnetic circuit connection sleeve; 114 - valve port; 115 - sealing ring;

[0031] 121 - armature; 1211 - recessed part; 122 - static iron core; 1221 - sinking groove; 123 - magnetic circuit elastic part; 124 - limiting elastic part;

[0032] 131 - sealing skeleton; 13111 - fixing disk; 13112 - supporting section; 13113 - insert section; 1312 - installation part; 132 - bushing; 133 - sealing structure; 134 - sealing elastic part;

[0033] 14 - limiting sleeve; 141 - radial part; 142 - axial part; 151 - clearance chamber; 152 - buffer clearance. Detailed implementation manners

[0034] The following illustrates the implementation manners of the present utility model through specific specific examples. Those skilled in the art can easily understand other advantages and effects of the present utility model from the content disclosed in this specification. The present utility model can also be implemented or applied through other different specific implementation manners. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present utility model. It should be noted that, without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0035] It should be noted that the drawings provided in the following embodiments only illustrate the basic concept of the present utility model in a schematic manner. Therefore, only the components related to the present utility model are shown in the drawings, rather than being drawn according to the number, shape, and size of the components in actual implementation. The type, quantity, and ratio of each component in actual implementation can be arbitrarily changed, and the component layout type may also be more complex.

[0036] Figure 1 Structural schematic diagram of the spool structure 100 provided by the embodiment of the present utility model. Figure 2 Cross-sectional view at the sealing component provided by the embodiment of the present utility model. As Figure 1 and Figure 2As shown, the utility model provides a valve core structure 100. The valve core structure 100 includes a valve sleeve assembly, a static iron core 122, a sealing assembly and an actuating assembly. The valve sleeve assembly itself forms a valve port 114 for medium circulation. The static iron core 122 is located on the side away from the valve port 114. The sealing assembly includes a sealing frame 131 and a bushing 132, and the sealing frame 131 and the bushing 132 are interference fit. The actuating assembly includes an armature 121, a magnetic circuit elastic member 123 and a limit sleeve 14, the armature 121 is located on a side close to the valve port 114, the magnetic circuit elastic member 123 is located between the armature 121 and the static iron core 122, so as to push the armature 121 away from the static iron core 122; the limit sleeve 14 is fixedly connected to the armature 121, and the limit sleeve 14 and a side surface of the armature 121 away from the static iron core 122 cooperate with each other to form a gap chamber 151; a portion of the bushing 132 is located in the gap chamber 151, and the bushing 132 and the armature 121 are gap-matched; when in the power-off state, there is a buffer gap 152 between the bushing 132 and the limit sleeve 14, and the sealing assembly abuts against the valve port 114; when in the power-on state, the limit sleeve 14 moves with the armature 121 to drive the sealing assembly to move in the direction away from the valve port 114.

[0037] It is worth noting that the valve core structure 100 can reserve a buffer gap 152 between the bushing 132 and the limit sleeve 14 when the power is off, so that the armature 121 does not need to overcome the air pressure when it moves toward the static iron core 122, that is, the time period for overcoming the air pressure is delayed, and the valve core structure 100 is easier to open under the atmospheric pressure difference. The buffer gap 152 in this embodiment can be 0.3mm. When the valve port 114 is opened, the armature 121 is far away from the static iron core 122, and the initial electromagnetic force is small. The armature 121 moves downward together with the limit sleeve 14, and only the spring preload and friction force need to be overcome during the movement. When the movement stroke reaches 0.3mm, the lower surface of the limit sleeve 14 contacts the upper surface of the bushing 132 and needs to overcome the air pressure to move. However, due to the increase in electromagnetic force and the impact force generated after contact, the sealing component can be brought to move downward together to open the valve port 114. After the valve port 114 is opened, the armature 121 first moves to the bottom, and the sealing assembly continues to move under the action of the sealing elastic member 134 until it contacts the upper surface of the armature 121. Depending on the specific implementation environment, the buffer gap 152 can also be 0.1 mm, 0.2 mm or 0.4 mm, etc. This embodiment is only an example of the size of the buffer gap 152, and does not constitute a limitation on its specific size value.

[0038] It is also worth mentioning that the sealing frame 131 and the bushing 132 of the valve core structure 100 are independent of each other, which has the advantages of simple processing and reduced processing costs. While retaining the original functions, it has better processability and manufacturability.

[0039] In this embodiment, as Figure 3 shown, the limit sleeve 14 includes a radial portion 141 and an axial portion 142. The axial portion 142 is fixedly connected to the circumferential surface of the armature 121. When in the power-off state, there is a buffer gap 152 between the radial portion 141 and the bushing 132. When in the power-on state, the radial portion 141 can abut against the bushing 132 to drive the bushing 132 and the sealing skeleton 131 to move in a direction away from the valve port 114.

[0040] It should be noted that in the power-on state, the radial portion 141 can abut against the bushing 132 and drive the bushing 132 and the sealing skeleton 131 to move in a direction away from the valve port 114. The limit sleeve 14 has the advantage of a compact structure and can achieve the air pressure buffering function in a smaller space.

[0041] In this embodiment, the sealing assembly further includes a sealing structure 133. The sealing structure 133 partially wraps the sealing skeleton 131, and the sealing structure 133 can abut against or away from the valve port 114 by following the movement of the sealing skeleton 131; the sealing structure 133 and the bushing 132 are independent of each other and do not contact each other.

[0042] It should be noted that the sealing structure 133 in this embodiment can be sealing rubber, which can be coated on the sealing skeleton 131 by insert injection molding process.

[0043] Please refer to Figure 4 , the sealing skeleton 131 includes an insert part and an installation part 1312 arranged coaxially. The longitudinal section of the insert part is in the shape of "I". The sealing structure 133 partially wraps the insert part. The installation part 1312 is inserted into the through hole of the armature 121, and the bushing 132 is in interference fit with the installation part 1312. It can be understood that the design of the insert part in the shape of "I" enables the sealing structure 133 to wrap the sealing skeleton 131 and is not easy to fall off.

[0044] Please refer to Figure 4 again, the insert part includes a fixed disk 13111, a support section 13112 and an insert section 13113. The fixed disk 13111 is a circular disk-shaped structure. The two ends of the support section 13112 are respectively connected to the fixed disk 13111 and the insert section 13113. The sealing structure 133 wraps the support section 13112 and the insert section 13113, and the sealing structure 133 abuts against the fixed disk 13111. It can be understood that the regular circular shape of the fixed disk 13111 makes the processing easy to form, and at the same time can provide a support base for the sealing elastic part 134.

[0045] In this embodiment, the valve sleeve assembly includes a valve sleeve body 111, a magnetic sleeve 112, and a magnetic circuit connection sleeve 113 that are sequentially connected. A first valve port channel 1111 and a second valve port channel 1112 are provided through the axis of the valve sleeve body 111. A valve port 114 is formed at the bottom of the first valve port channel 1111. The sealing assembly controls the communication between the first valve port channel 1111 and the second valve port channel 1112 by abutting against or moving away from the valve port 114. It can be understood that the medium can first flow into one of the first valve port channel 1111 and the second valve port channel 1112, then pass through the valve port 114, and finally flow out from the other of the first valve port channel 1111 and the second valve port channel 1112. Therefore, the communication between the first valve port channel 1111 and the second valve port channel 1112 can be controlled through the valve port 114, that is, the flow of the medium can be controlled. In addition, a sealing ring 115 is further provided at the top of the valve sleeve body 111 for installing and sealing the valve sleeve body 111.

[0046] Please refer to again Figure 1 , the sealing assembly further includes a sealing elastic member 134. The sealing elastic member 134 is located in the second valve port channel 1112, and both ends of the sealing elastic member 134 respectively abut against the sealing skeleton 131 and the concave portion of the valve sleeve body 111. It can be understood that the sealing elastic member 134 in this embodiment can be a sealing spring, which can drive the sealing skeleton 131 to abut against the valve port 114 in its free state, thereby improving the overall airtightness.

[0047] Please refer to Figure 2 , the valve core structure 100 further includes a limiting elastic member 124. A sink 1221 is provided on the side of the static iron core 122 facing the armature 121. The side of the armature 121 facing the static iron core 122 has a recess 1211 disposed opposite to the sink 1221. Both ends of the limiting elastic member 124 respectively abut against the sink 1221 and the recess 1211 to limit the relative distance between the armature 121 and the static iron core 122.

[0048] It is worth noting that the limiting elastic member 124 of the valve core structure 100 can be installed in the sink 1221 of the static iron core 122 and the recess 1211 of the armature 121 at the same time. Therefore, it can increase its own manufacturing length, making the processed dimensional structure easier to ensure and control, and having higher fatigue durability performance.

[0049] In this embodiment, the recess 1211 is a stepped hole structure. The end of the limiting elastic member 124 away from the static iron core 122 abuts against the large-diameter end face of the recess 1211, and the end of the magnetic circuit elastic member 123 away from the static iron core 122 abuts against the small-diameter end face of the recess 1211. The limiting elastic member 124 is sleeved on the magnetic circuit elastic member 123.

[0050] It can be understood that the limiting elastic member 124 is sleeved on the magnetic circuit elastic member 123, which means that the diameter of the limiting elastic member 124 is larger than that of the magnetic circuit elastic member 123. The two do not contact each other and there will be no interference phenomenon. The magnetic circuit elastic member 123 can be used to push the armature 121 away from the static iron core 122 in the natural state. The limiting elastic member 124 can prevent the impact between the armature 121 and the static iron core 122.

[0051] In this embodiment, the limiting elastic member 124 and the magnetic circuit elastic member 123 are coaxially arranged. It is worth noting that the coaxially arranged limiting elastic member 124 and magnetic circuit elastic member 123 are easier to install, can improve the manufacturing convenience of the spool structure 100, and reduce the production cost.

[0052] This embodiment also discloses a solenoid valve, including the above-mentioned spool structure 100, and has all its beneficial effects.

[0053] The above embodiments merely illustrate the principles and effects of the present invention by way of example, and are not intended to limit the present invention. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical idea disclosed by the present invention should still be covered by the claims of the present invention.

[0054] In the description herein, numerous specific details are provided, such as examples of components and / or methods, to provide a complete understanding of the embodiments of the present invention. However, those skilled in the art will recognize that the embodiments of the present invention can be practiced without one or more of the specific details or by other devices, systems, components, methods, parts, materials, parts, etc. In other cases, well-known structures, materials, or operations are not specifically shown or described in detail to avoid obscuring aspects of the embodiments of the present invention.

[0055] Throughout the specification, reference to "an embodiment", "embodiment" or "specific embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present invention and not necessarily in all embodiments. Thus, appearances of the phrases "in an embodiment", "in the embodiment" or "in a specific embodiment" in various places throughout the specification are not necessarily referring to the same embodiment. Moreover, the specific features, structures, or characteristics of any specific embodiment of the present invention can be combined in any suitable manner with one or more other embodiments. It should be understood that other variations and modifications of the embodiments of the present invention as described herein and shown may be made in accordance with the teachings herein and will be considered part of the spirit and scope of the present invention.

[0056] It should also be understood that one or more of the elements shown in the drawings can also be implemented in a more separated or more integrated manner, or even removed because they cannot operate in some cases or provided because they can be useful according to a specific application.

[0057] In addition, unless otherwise expressly specified, any marked arrows in the drawings should be regarded as exemplary only and not restrictive. Furthermore, unless otherwise indicated, the term "or" as used herein generally intends to mean "and / or". In cases where the term is foreseen to be unclear due to the ability to provide separation or combination, the combination of components or steps will also be regarded as having been specified.

[0058] As used in the description herein and throughout the following claims, unless otherwise indicated, "a", and "the" include plural references. Similarly, as used in the description herein and throughout the following claims, unless otherwise indicated, the meaning of "in..." includes "in..." and "on...".

[0059] The above description of the embodiments shown in the present utility model (including the content in the abstract of the specification) is not intended to be exhaustive or to limit the present utility model to the precise forms disclosed herein. Although specific embodiments of the present utility model and examples of the present utility model are described herein for illustrative purposes only, as will be recognized and understood by those skilled in the art, various equivalent modifications are possible within the spirit and scope of the present utility model. As indicated, these modifications to the present utility model can be made in accordance with the above description of the embodiments of the present utility model, and these modifications will be within the spirit and scope of the present utility model.

[0060] The systems and methods have been generally described herein to facilitate an understanding of the details of the present utility model. In addition, various specific details have been given to provide an overall understanding of the embodiments of the present utility model. However, those skilled in the relevant art will recognize that the embodiments of the present utility model can be practiced without one or more of the specific details, or can be practiced using other devices, systems, accessories, methods, components, materials, parts, etc. In other cases, well-known structures, materials, and / or operations have not been shown or described in detail to avoid obscuring various aspects of the embodiments of the present utility model.

Claims

1. A spool structure, characterized in that, include: The valve sleeve assembly is formed with a valve port for medium circulation; A static iron core, located at a side away from the valve port; A sealing assembly, comprising a sealing frame and a bushing, wherein the sealing frame and the bushing are interference fit; The actuating assembly comprises an armature, a magnetic circuit elastic member and a limit sleeve, wherein the armature is located on a side close to the valve port, and the magnetic circuit elastic member is located between the armature and the static iron core so as to push the armature away from the static iron core; the limit sleeve is fixedly connected to the armature, and the limit sleeve cooperates with a surface of the armature on a side away from the static iron core to form a gap chamber; a portion of the bushing is located in the gap chamber, and the bushing cooperates with the armature gap; when in a power-off state, there is a buffer gap between the bushing and the limit sleeve, and the sealing assembly abuts against the valve port; when in a power-on state, the limit sleeve moves with the armature to drive the sealing assembly to move in a direction away from the valve port.

2. The spool structure according to claim 1, wherein, The limit sleeve includes a radial portion and an axial portion, wherein the axial portion is fixedly connected to the circumferential surface of the armature. When in a power-off state, a buffer gap exists between the radial portion and the sleeve. When in a power-on state, the radial portion can abut against the sleeve to drive the sleeve and the sealing frame to move in a direction away from the valve port.

3. The spool structure according to claim 1, characterized in that, The sealing assembly also includes a sealing structure, which is partially covered by the sealing frame, and the sealing structure can abut against or move away from the valve port by following the movement of the sealing frame; the sealing structure and the bushing are independent of each other and do not contact each other.

4. The spool structure according to claim 3, characterized in that, The sealing frame includes an insert part and a mounting part which are coaxially arranged. The longitudinal section of the insert part is in an "I" shape. The sealing structure is partially covered by the insert part. The mounting part is inserted into the through hole of the armature. The bushing is interference fit with the mounting part.

5. The spool structure according to claim 4, characterized in that, The insert portion includes a fixed disk, a support section and an insert section. The fixed disk is a circular disk structure. Two ends of the support section are respectively connected to the fixed disk and the insert section. The sealing structure is coated on the support section and the insert section, and the sealing structure abuts against the fixed disk.

6. The spool structure according to claim 1, wherein, The valve sleeve assembly includes a valve sleeve body, a magnetic sleeve and a magnetic circuit connecting sleeve which are connected in sequence. A first valve port channel and a second valve port channel are provided through the central axis of the valve sleeve body. The bottom of the first valve port channel forms the valve port. The sealing assembly controls the communication between the first valve port channel and the second valve port channel by abutting against or moving away from the valve port.

7. The spool structure according to claim 6, wherein The sealing assembly further comprises a sealing elastic member, which is located in the second valve port channel, and two ends of the sealing elastic member are respectively in contact with the sealing frame and the inner recessed portion of the valve sleeve body.

8. The spool structure according to claim 1, characterized in that, The spool structure further includes a limiting elastic member. A sunk groove is provided on one side of the static iron core facing the armature. One side of the armature facing the static iron core has a recess portion disposed opposite to the sunk groove. Two ends of the limiting elastic member respectively abut against the sunk groove and the recess portion to limit the relative distance between the armature and the static iron core.

9. The spool structure according to claim 8, wherein, The recess portion is a stepped hole structure. One end of the limiting elastic member away from the static iron core abuts against the large-diameter end face of the recess portion. One end of the magnetic path elastic member away from the static iron core abuts against the small-diameter end face of the recess portion. The limiting elastic member is sleeved on the magnetic path elastic member.

10. The spool structure according to claim 9, wherein The limiting elastic member and the magnetic path elastic member are coaxially arranged.

11. A solenoid valve, characterized in that, It includes the spool structure according to any one of claims 1-10.

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