CN217056463U

CN217056463U - Valve element and one-way valve

Info

Publication number: CN217056463U
Application number: CN202220783608.6U
Authority: CN
Inventors: 宣永斌; 寿周阳
Original assignee: Zhejiang Dunan Machinery Co Ltd
Current assignee: Zhejiang Dunan Machinery Co Ltd
Priority date: 2022-04-02
Filing date: 2022-04-02
Publication date: 2022-07-26
Anticipated expiration: 2032-04-02
Also published as: WO2023185916A1

Abstract

The utility model discloses a valve core and a one-way valve, wherein the valve core comprises a body and a plurality of wing plates, and the side surface of the body is provided with at least one diameter-variable part; the wing plates are arranged on the side surface of the body in a protruding mode and are arranged at intervals along the circumferential direction of the body, and a flow channel is formed between every two adjacent wing plates; a diameter-variable part is arranged in at least one flow passage, so that the flow area of the flow passage corresponding to the diameter-variable part is not equal to the flow area of at least one of the other flow passages; the outer wall surface of the diameter-variable part and a virtual plane form a line segment, the radial distances between each point on the line segment and the axis of the body are not all equal, and the virtual plane is perpendicular to the axis of the body. When fluid passes through the valve core, the valve core is subjected to force in the radial direction of the valve core with different magnitudes, so that a radial component force exists in the radial direction of the valve core, the valve core can abut against the inner wall surface of the inner cavity of the valve body through the radial component force, and the noise generated when the valve core impacts the valve body is avoided.

Description

Valve element and one-way valve

Technical Field

The utility model relates to a valve structure technical field particularly, relates to a case and check valve.

Background

One-way valves are widely used in refrigeration systems, for example, in parallel with a capillary tube of an air conditioning system to control the forward and reverse flow directions of a refrigerant so that the refrigerant flows in a predetermined direction.

In the prior art, a float-type check valve is proposed, which includes a valve body and a valve core installed inside the valve body, wherein the valve core includes a body portion and a plurality of wings extending from the body portion. However, in the prior art, the valve body is installed in the air conditioner pipeline after, because the reason of pipeline vibrations and the structure of valve body itself, can lead to the case to rock, shake about the valve body is inside, striking valve body inner wall, the noise of production.

SUMMERY OF THE UTILITY MODEL

An embodiment of the utility model provides a case and check valve to improve the case striking valve body that exists among the prior art and produce the problem of noise.

The valve core of the one-way valve comprises a body and a plurality of wing plates, wherein the side surface of the body is provided with at least one diameter-changing part; the wing plates are arranged on the side surface of the body in a protruding mode and are arranged at intervals along the circumferential direction of the body, and a flow channel is formed between every two adjacent wing plates; the diameter-variable part is arranged in at least one of the flow passages, so that the flow area of the flow passage corresponding to the diameter-variable part is not equal to the flow area of at least one of the rest flow passages; the outer wall surface of the diameter-variable part and a virtual plane form a line segment, the radial distances between each point on the line segment and the axis of the body are not all equal, and the virtual plane is perpendicular to the axis of the body.

According to some embodiments of the invention, the reducing portion is configured as a tangent plane, such that the line segment is a straight line.

According to some embodiments of the invention, the tangent plane is parallel to the axis of the body.

According to some embodiments of the invention, the body comprises:

the tangent plane and the side surface of the constant-diameter section form a first straight line section and a second straight line section respectively;

the first variable-diameter section is connected to one end of the constant-diameter section, and a first arc line section is formed by the tangent plane and the side surface of the first variable-diameter section; and

the second variable-diameter section is connected to the other end of the constant-diameter section, and a second arc line section is formed by the tangent plane and the side surface of the second variable-diameter section;

the first arc line segment, the first straight line segment, the second arc line segment and the second straight line segment are sequentially connected end to end.

According to the utility model discloses a some embodiments, the pterygoid lamina connect in the constant diameter section with the second reducing section, and the one end protrusion of pterygoid lamina in the second reducing section deviates from the terminal surface of constant diameter section.

According to some embodiments of the invention, the diameter-varying portion is configured as a protrusion.

According to some embodiments of the present invention, along the circumferential direction of the body, every adjacent two the pterygoid lamina forms a contained angle, each the contained angle equals.

According to some embodiments of the invention, the number of wings is three or more.

According to some embodiments of the invention, the number of said wing plates is three, three of said wing plates being evenly arranged along the circumference of said body;

the number of the diameter-variable parts is two, and the two diameter-variable parts respectively correspond to the two adjacent runners.

The utility model discloses check valve, including valve body and above-mentioned arbitrary one-way valve's case, the case sets up in the valve body.

According to the utility model discloses a some embodiments, the valve body has the valve port, the reducing portion setting of case is in the body of case is close to the one end of valve port.

An embodiment of the above utility model has at least the following advantages or beneficial effects:

the utility model discloses the case, reducing portion sets up between two adjacent pterygoid laminas, through set up reducing portion on the body, make the flow area of the runner that this reducing portion corresponds and the flow area inequality of at least one of all the other runners, because the fluid pressure that the great runner of flow area received is great, and the fluid pressure that the less runner of flow area received is less, in-process when the fluid passes through the case, the case receives along its radial direction's power variation in size, lead to there being a radial component in the radial meeting along the case, this radial component can make the case support and lean on the internal face at the valve body inner chamber, thereby avoid case striking valve body and noise generation.

Drawings

Fig. 1 is a schematic view of a check valve according to an embodiment of the present invention.

Fig. 2 shows a cross-sectional view a-a in fig. 1.

Fig. 3 is an exploded view of the check valve according to the embodiment of the present invention.

Fig. 4 shows a schematic view of a valve cartridge according to an embodiment of the present invention from a viewing angle.

Fig. 5 shows a schematic view of a valve cartridge according to an embodiment of the invention from another viewing angle.

Fig. 6 shows a schematic view of a valve cartridge according to another embodiment of the present invention.

Fig. 7 is a schematic view showing a line segment formed after the variable diameter portion is cut on a virtual plane.

Wherein the reference numerals are as follows:

1. first connecting pipe

2. Valve body

21. Valve port

3. Valve core

31. Body

311. Equal diameter section

312. First variable diameter section

313. Second variable diameter section

314. Variable diameter part

315. Projection

32. Wing plate

331. A first straight line segment

332. Second straight line segment

333. First arc segment

334. Second arc segment

4. End cap

5. Second connecting pipe

61. First flow channel

62. Second flow channel

63. Third flow channel

7. Virtual plane

71. Line segment

Alpha 1, first angle

Alpha 2, second included angle

Alpha 3, third angle

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus a detailed description thereof will be omitted.

As shown in fig. 1 to 3, fig. 1 is a schematic view of a check valve according to an embodiment of the present invention. Fig. 2 shows a cross-sectional view a-a of fig. 1. Fig. 3 is an exploded view of the check valve according to the embodiment of the present invention. The utility model discloses check valve includes: the valve comprises a first connecting pipe 1, a valve body 2, a valve core 3, an end cover 4 and a second connecting pipe 5. The first connecting pipe 1 is connected with one end of the valve body 2, and the first connecting pipe 1 is used for connecting a fluid inlet pipe. The end cover 4 is connected with the other end of the valve body 2. A second connecting piece 5 is connected to the end cap 4, the second connecting piece 5 being used for connecting a fluid outlet tube. The valve core 3 is arranged in the inner cavity of the valve body 2 and is used for plugging or opening a valve port 21 arranged in the valve body 2.

It will be understood that the terms "comprises" and "comprising," and any variations thereof, in the embodiments of the present invention, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or may alternatively include other steps or elements inherent to such process, method, article, or apparatus.

As an example, fluid enters the valve body 2 from the first connecting pipe 1, and the valve core 3 is driven to move towards the second connecting pipe 5 by virtue of the pressure of the fluid, so that the valve port 21 of the valve body 2 is opened, and the fluid passes through the valve body 2 to reach the second connecting pipe 5. When the flow of the fluid in the direction of the second connection pipe 5 is stopped, the valve core 3 can be reset to a position for continuously blocking the valve port 21 by the gravity or an elastic driving force of the valve core 3.

It can be understood that, the valve port 21 can be opened and closed by the valve core 3 reciprocating along the axis of the valve body 2, so as to realize the function of one-way conduction.

It should be understood that the structure and material of the first connection pipe 1, the valve body 2, the end cover 4 and the second connection pipe 5 do not substantially limit the technical solution of the valve core 3 provided in the present application, and mature products in the prior art can be adopted, and are not described herein again.

As shown in fig. 4 and 5, fig. 4 is a schematic view of the valve cartridge 3 according to the embodiment of the present invention from one perspective. Fig. 5 shows a schematic view of a valve cartridge 3 according to an embodiment of the invention from another viewing angle. The utility model discloses case 3 of embodiment, including body 31 and a plurality of pterygoid lamina 32. The side surface of the body 31 has at least one diameter-changing portion 314. The plurality of wing plates 32 are arranged on the side surface of the body 31 in a protruding mode and are arranged at intervals along the circumferential direction of the body 31, and a flow channel (61,62 and 63) is formed between every two adjacent wing plates 32. The diameter-variable portion 314 is disposed between two adjacent wing plates 32, so that a flow area of a flow channel corresponding to the diameter-variable portion 314 is not equal to a flow area of at least one of the remaining flow channels.

In this embodiment, the diameter-variable portion 314 is disposed between two adjacent wing plates 32, and the diameter-variable portion 314 is disposed on the body 31, so that a flow area of a flow passage corresponding to the diameter-variable portion 314 is not equal to a flow area of at least one of the other flow passages, and since a flow passage with a larger flow area receives a larger fluid pressure and a flow passage with a smaller flow area receives a smaller fluid pressure, when a fluid passes through the spool 3, the magnitude of a force applied to the spool 3 in the radial direction thereof is not uniform, so that a radial component force exists in the radial direction of the spool 3, and the spool 3 is abutted against the inner wall surface of the inner cavity of the valve body 2 by the radial component force, thereby preventing the spool 3 from striking the valve body 2 to generate noise.

In the prior art, the body of the valve element is generally a regularly shaped solid of revolution, for example, a cylindrical shape. The plurality of wing plates are arranged on the outer side wall of the body in a protruding mode and are arranged along the circumferential direction of the body at even intervals. In this way, the flow area of the flow passage formed between each adjacent two of the vanes is substantially uniform. When fluid flows through the valve core, the forces of the valve core in the radial direction of the valve core are basically balanced. Further, since the valve element needs to reciprocate in the valve body along the axis of the valve body, a gap needs to be provided between the flange and the inner wall surface of the inner cavity of the valve body. When the valve body is installed in the air conditioner pipeline, and the air conditioner pipeline has the reason of vibrations and/or valve body self structure, because the existence in clearance, the case can rock, shake about the valve body inside the valve body, and then striking valve body and noise production.

The embodiment of the utility model provides an in, set up reducing portion 314 through body 31 at case 3, this reducing portion 314 can make body 31 be anomalous shape on the same radial cross section of the part that corresponds to set up reducing portion 314, and then when a plurality of pterygoid lamina 32 set up the side at body 31, the flow area of a plurality of runners that form between every two adjacent pterygoid laminas 32 is not of uniform size, finally makes case 3 support and leans on at valve body 2, avoids it to rock.

In one embodiment, the diameter-varying portion 314 is configured as a tangent plane.

By configuring the diameter-variable portion 314 as a tangent plane, the distance between the region of the body 31 where the tangent plane is provided and the axis of the body 31 becomes smaller, and the flow area of the flow passage corresponding to the tangent plane is increased. The flow area of the flow channel corresponding to the section is larger than that of the other flow channels of the body 31 without the section, so that the radial stress of the valve core 3 is unbalanced when the fluid passes through the valve core 3.

It will be appreciated that the cut surface may be formed by being formed integrally with the body 31, the wing 32, for example by moulding. Of course, the body 31 having a regular shape may be formed first, and then the cut surface may be formed by milling the body 31.

In one embodiment, the cut surface may be near an end of the body 31 that is adjacent to the port 21 of the valve body 2.

The tangent plane may or may not be parallel to the axis of the body 31. When the tangent plane is not parallel to the axis of the body 31, the tangent plane may gradually approach or gradually depart from the axis of the body 31 along the flowing direction of the fluid.

The body 31 includes a constant diameter section 311, a first variable diameter section 312, and a second variable diameter section 313. The first variable diameter section 312 is connected to one end of the constant diameter section 311, and the first variable diameter section 312 is adapted to be in sealing engagement with the valve port 21 of the valve body 2. When the check valve is turned on, the first variable diameter section 312 is away from the valve port 21 of the valve body 2. When the check valve is closed, the first diameter-changing section 312 blocks the valve port 21 of the valve body 2. The second variable diameter section 313 is connected to the other end of the constant diameter section 311.

The constant diameter section 311 can be understood as: the cross-sectional areas of the plurality of cross-sections formed by cutting the equal-diameter section 311 in a direction perpendicular to the axis of the body 31 are all equal. The first and second

variable diameter sections

312 and 313 may be understood as: the first and second

variable diameter sections

312 and 313 are cut in a direction perpendicular to the axis of the body 31, respectively, and the cross-sectional areas of the sections formed after the first variable diameter section 312 is cut are not equal to each other, and the cross-sectional areas of the sections formed after the second variable diameter section 313 is cut are not equal to each other.

As an example, the first variable diameter section 312 extends from one end of the constant diameter section 311 to a direction away from the second variable diameter section 313, and the cross-sectional area of the first variable diameter section 312 becomes gradually smaller. The second variable diameter section 313 extends from the other end of the constant diameter section 311 in a direction away from the first variable diameter section 312, and the cross-sectional area of the second variable diameter section 313 gradually becomes smaller.

The tangent plane and the side surface of the constant diameter section 311 form a first straight line section 331 and a second straight line section 332 respectively. The tangent plane and the side of the first reducer section 312 form a first arc segment 333. The tangent plane and the side of the second variable-diameter section 313 form a second arc section 334. The first arc line segment 333, the first straight line segment 331, the second arc line segment 334 and the second straight line segment 332 are sequentially connected end to form a closed curve.

It is understood that the constant diameter section 311 may be formed by a cylindrical forming section, and the first and second

variable diameter sections

312 and 313 may be formed by a circular truncated cone forming section.

In an embodiment, the taper of the circular truncated cone of the first reducing section 312 may be the same as or different from the taper of the circular truncated cone of the second reducing section 313. It is understood that the taper refers to the ratio of the diameter difference of the upper and lower bottom circles of the circular truncated cone to the height of the circular truncated cone.

The wing plate 32 is connected to the constant diameter section 311 and the second variable diameter section 313, and one end of the wing plate 32 protrudes from an end surface of the second variable diameter section 313 away from the constant diameter section 311.

With reference to fig. 5, an included angle is formed between every two adjacent wing plates 32 along the circumferential direction of the main body 31, and the included angles are equal. Specifically, a first included angle α 1, a second included angle α 2, and a third included angle α 3 are formed between adjacent wing plates 32, and the first included angle α 1, the second included angle α 2, and the third included angle α 3 are substantially equal to each other.

It can be understood that, since the first included angle α 1, the second included angle α 2 and the third included angle α 3 are respectively substantially equal, if the body 31 is not provided with the diameter-varying portion 314, the flow areas of the flow passages should be equal. The utility model discloses in, on the basis that the contained angle equals, through setting up reducing portion 314, can directly change the flow area with the runner that this reducing portion 314 corresponds.

The number of wings 32 may be plural, for example two, three or more.

In the present embodiment, the number of the wing plates 32 is three, and the three wing plates 32 are uniformly arranged along the circumferential direction of the body 31, that is, the first included angle α 1, the second included angle α 2, and the third included angle α 3 are respectively equal. The flow channel corresponding to the first included angle α 1 is a first flow channel 61, the flow channel corresponding to the second included angle α 2 is a second flow channel 62, and the flow channel corresponding to the third included angle α 3 is a third flow channel 63.

The number of the diameter-variable portions 314 is two, and the two diameter-variable portions 314 correspond to the adjacent two flow passages, respectively. For example, one of the variable diameter portions 314 corresponds to the second flow channel 62, and the other variable diameter portion 314 corresponds to the third flow channel 63.

Of course, the number of the variable diameter portions 314 may also be three, and the three variable diameter portions 314 correspond to the first flow channel 61, the second flow channel 62 and the third flow channel 63, respectively. Since it is necessary to ensure the non-uniformity of the flow areas of the three flow passages, the distances between the outer walls of the three diameter-varying portions 314 and the axis of the body 31 need to be ensured. For example, when the diameter-variable portion 314 is configured as a section, the distance between one section and the axis of the body 31 is different from that between the other sections, so as to ensure that the flow areas of at least two of the three flow passages are different.

In other embodiments, the number of the diameter-variable portions 314 may be one, so that the flow area of the flow passage corresponding to the diameter-variable portion 314 is different from the flow area of other flow passages.

In other embodiments, the first included angle α 1, the second included angle α 2, and the third included angle α 3 may also be unequal. For example, the distance between two adjacent wings 32 corresponding to the variable diameter portion 314 may be designed to be larger, and the distance between two wings 32 where the variable diameter portion 314 is not provided may be designed to be smaller.

As an example, the first included angle α 1 is smaller than the second included angle α 2, so that the flow area of the second flow passage 62 is much larger than the flow area of the first flow passage 61, thereby increasing the radial component force applied to the valve element 3 and ensuring that the valve element 3 can stably abut against the inner cavity wall of the valve body 2.

As shown in fig. 6, fig. 6 is a schematic view of a valve cartridge 3 according to another embodiment of the present invention. The valve core 3 of this embodiment is the same as the valve core 3 of the above embodiment, and the differences are as follows: the variable diameter portion 314 is configured as a protrusion 315.

Specifically, the diameter-variable portion 314 is configured as a protrusion 315, so that the distance between the outer wall of the protrusion 315 and the axis of the body 31 is farther than other positions of the body 31, thereby reducing the flow area of the flow channel corresponding to the protrusion 315, and finally, the flow areas of the plurality of flows are different, so that the valve element 3 can abut against the inner cavity wall of the valve body 2.

In one embodiment, the first included angle α 1, the second included angle α 2, and the third included angle α 3 may be equal, respectively. Under the condition that the three included angles are equal, the flow area of the flow channel corresponding to the position where the protrusion 315 is arranged is smaller than the flow areas of other flow channels. In the present embodiment, the flow area of the second flow passage 62 is smaller than the flow area of the first flow passage 61, and the flow area of the second flow passage 62 is smaller than the flow area of the third flow passage 63.

Of course, the first included angle α 1, the second included angle α 2, and the third included angle α 3 may not be equal. For example, the second included angle α 2 is smaller than the first included angle α 1, and the second included angle α 2 is smaller than the third included angle α 3. Because the second included angle α 2 of the second flow channel 62 is the smallest, and the protrusion 315 is further disposed at the second flow channel 62, the flow area of the second flow channel 62 is far smaller than that of the first flow channel 61 or the second flow channel 62, so as to increase the radial component force applied to the valve core 3, and ensure that the valve core 3 can stably abut against the inner cavity wall of the valve body 2.

In addition, when the body 31 is provided with two or more variable diameter portions 314, a part of the variable diameter portion 314 may be a tangent plane, and a part of the variable diameter portion 314 may be a protrusion 315.

In the present embodiment, as shown in fig. 6, the second flow channel 62 corresponds to the protrusion 315, the third flow channel 63 corresponds to the cross section, and the first flow channel 61 is not provided with the diameter-variable portion 314.

It is understood that the various embodiments/implementations provided by the present invention can be combined without contradiction, and are not illustrated herein.

As shown in fig. 7, fig. 7 is a schematic view showing a line segment formed after the variable diameter portion is cut by a virtual plane. In the present embodiment, the outer wall surface of the variable diameter portion 314 and a virtual plane 7 form a line segment 71, and the radial distances H between each point on the line segment 71 and the axis L of the body 31 are not all equal, wherein the virtual plane 7 is perpendicular to the axis L of the body 31.

That is, the virtual plane 7 cuts the diameter-changing portion 314 in a direction perpendicular to the axis L of the body 31 so that the outer wall surface of the diameter-changing portion 314 intersects the virtual plane 7 to form a line segment 71, and the radial distances H between the points on the line segment 71 and the axis L are not all equal.

It will be appreciated that the radial distances H between points on the line segment 71 and the axis L may be all unequal or not all equal. When the radial distances H are all unequal, the radial distances H between the points on the line segment 71 and the axis L may become progressively larger or smaller. When the radial distances H are not all equal, the distance between the midpoint of the line segment 71 and the axis L may be the shortest, the distance between the ends of the line segment 71 may be the longest, and the distances between the ends of the line segment 71 and the axis L may be equal.

It should be noted that, when the variable diameter portion 314 is a tangent plane, the line segment 71 may be a straight line. Of course, in some embodiments, the line segment 71 may be a curve according to the shape of the diameter-changing portion 314.

The utility model discloses the advantage and the beneficial effect of case 3 and check valve include at least:

the diameter-variable part 314 is arranged between two adjacent wing plates 32, and the diameter-variable part 314 is arranged on the body 31, so that the flow area of the flow channel corresponding to the diameter-variable part 314 is not equal to the flow area of at least one of other flow channels, and because the flow channel with the larger flow area is subjected to larger fluid pressure and the flow channel with the smaller flow area is subjected to smaller fluid pressure, when fluid passes through the valve core 3, the force applied to the valve core 3 along the radial direction is not uniform, so that a radial component force exists along the radial direction of the valve core 3, and the valve core 3 can abut against the inner wall surface of the inner cavity of the valve body 2 due to the radial component force, thereby avoiding noise generated when the valve core 3 impacts the valve body 2.

In the embodiments of the present invention, the terms "first", "second", "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more unless expressly limited otherwise. The terms "mounted," "connected," "fixed," and the like are used broadly and should be construed to include, for example, "connected" may be a fixed connection, a detachable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meanings of the above terms in the embodiments of the present invention can be understood by those skilled in the art according to specific situations.

In the description of the embodiments of the present invention, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the device or unit indicated must have a specific direction, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the embodiments of the present invention.

In the description of the present specification, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of an embodiment of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only a preferred embodiment of the invention and is not intended to limit the same, and various modifications and changes may be made to the embodiment by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the embodiments of the present invention should be included in the protection scope of the embodiments of the present invention.

Claims

1. A valve cartridge for a one-way valve, comprising:

the side surface of the body is provided with at least one diameter-changing part;

the wing plates are convexly arranged on the side surface of the body and are arranged at intervals along the circumferential direction of the body, and a flow channel is formed between every two adjacent wing plates;

the diameter-variable part is arranged in at least one of the flow passages, so that the flow area of the flow passage corresponding to the diameter-variable part is not equal to the flow area of at least one of the rest flow passages;

the outer wall surface of the diameter-variable part and a virtual plane form a line segment, the radial distances between each point on the line segment and the axis of the body are not all equal, and the virtual plane is perpendicular to the axis of the body.

2. The valve cartridge of the check valve according to claim 1, wherein the diameter-varying portion is configured as a tangential surface such that the line segment is a straight line.

3. The valve cartridge of the one-way valve according to claim 2, wherein the tangent plane is parallel to the axis of the body.

4. The valve cartridge of the one-way valve of claim 2, wherein the body comprises:

5. The valve cartridge of the check valve according to claim 4, wherein the flap is connected to the constant diameter section and the second variable diameter section, and one end of the flap protrudes from an end surface of the second variable diameter section facing away from the constant diameter section.

6. The valve cartridge of the check valve as recited in claim 1, wherein the variable diameter portion is configured as a protrusion.

7. The valve element of the one-way valve according to claim 1, wherein an included angle is formed between every two adjacent wing plates along the circumferential direction of the body, and the included angles are equal.

8. The valve cartridge of a check valve according to claim 1, wherein the number of the wings is three or more.

9. The valve cartridge of the check valve according to claim 8, wherein the number of the wings is three, and the three wings are uniformly arranged along a circumferential direction of the body;

10. A check valve, comprising:

a valve body; and

a valve element of a one-way valve as claimed in any one of claims 1 to 9, the valve element being disposed within the valve body.

11. The check valve of claim 10, wherein the valve body has a valve port, and the variable diameter portion of the poppet is disposed at an end of the body of the poppet proximate to the valve port.