CN217653298U

CN217653298U - One-way valve

Info

Publication number: CN217653298U
Application number: CN202220755998.6U
Authority: CN
Inventors: 刘俊龙; 李卫; 王雪鹏; 孔凡强
Original assignee: Weichai Power Co Ltd
Current assignee: Weichai Power Co Ltd
Priority date: 2022-04-02
Filing date: 2022-04-02
Publication date: 2022-10-25
Anticipated expiration: 2032-04-02

Abstract

The utility model provides a check valve, check valve includes: the valve body is provided with a circulation cavity extending along the axial direction of the valve body, the circulation cavity comprises an inlet section, a throat section and an outlet section, the inlet section comprises a gradually-reducing section, the outlet section comprises a gradually-expanding section, two ends of the throat section are respectively connected with the gradually-reducing section and the gradually-expanding section, the size of the cross section of the gradually-reducing section is gradually reduced in the direction that the inlet section points to the outlet section, and the size of the cross section of the gradually-expanding section is gradually increased; the valve core is movably arranged in the throat opening section in a penetrating mode along the axial direction of the valve body, and the valve core is provided with a sealing position attached to the throat opening section and an opening position separated from the throat opening section. Through the technical scheme that this application provided, can solve the easy problem that breaks and become invalid of taking place for the valve block of the check valve among the correlation technique.

Description

One-way valve

Technical Field

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

Background

The check valve is an important part of the engine and is mainly arranged on a gas pipeline or an oil pipeline. The one-way valve can control the one-way circulation of gas or oil liquid, and prevent backflow, thereby ensuring the safety performance of the engine.

In the correlation technique, the check valve includes valve block and valve body, and gas or fluid can the forward flow when the valve block is in the open mode, and when the valve block was in the closed condition, can prevent gas or fluid backward flow.

However, the valve sheet of the related art check valve is easily broken to fail.

SUMMERY OF THE UTILITY MODEL

The utility model provides a check valve to solve the problem that the valve block of the check valve among the correlation technique breaks easily and became invalid.

The utility model provides a check valve, check valve includes: the valve body is provided with a circulation cavity extending along the axial direction of the valve body, the circulation cavity comprises an inlet section, a throat section and an outlet section, the inlet section comprises a gradually-reducing section, the outlet section comprises a gradually-expanding section, two ends of the throat section are respectively connected with the gradually-reducing section and the gradually-expanding section, the size of the cross section of the gradually-reducing section is gradually reduced in the direction that the inlet section points to the outlet section, and the size of the cross section of the gradually-expanding section is gradually increased; the valve core penetrates through the throat section in a movable mode along the axial direction of the valve body, and the valve core is provided with a sealing position attached to the throat section and an opening position separated from the throat section.

Furthermore, the outlet section also comprises a diffuser section, two ends of the divergent section are respectively connected with the throat section and the diffuser section, the size of the cross section of the diffuser section is gradually increased in the direction that the inlet section points to the outlet section, and the length size of the diffuser section is larger than that of the divergent section.

Further, the length of the diffuser section is L1, the length of the divergent section is L2, and the ratio of L1 to L2 is between 7 and 10.

Further, the diffuser section has a diffuser angle in the range of 5 ° to 10 °.

Further, the cross-sectional dimension of the throat section decreases and then increases in a direction from the entrance section to the exit section.

Furthermore, the inlet section also comprises an equal-diameter section, two ends of the reducing section are respectively connected with the equal-diameter section and the throat section, and the cross section of the equal-diameter section is unchanged in the direction from the inlet section to the outlet section.

Further, the valve core comprises a conical section movably arranged through the throat opening section, the cross section of the conical section is gradually increased in size in the direction from the inlet section to the outlet section, and the conical section is provided with a sealing position attached to the throat opening section and an opening position separated from the throat opening section.

The valve core further comprises a cylindrical section, the cylindrical section is connected with one end, facing the inlet section, of the conical section, and the cylindrical section is movably arranged in the guide hole in a penetrating mode; and/or one end of the conical section facing the outlet section is provided with a spherical recess, and the axis of the spherical recess is coincided with the axis of the conical section.

Furthermore, the check valve also comprises a return spring, and the return spring is arranged between the valve core and the valve body.

Further, the inlet section also comprises an equal-diameter section, two ends of the tapered section are respectively connected with the equal-diameter section and the throat section, the length of the diffuser section is L1, the length of the tapered section is L2, the length of the throat section is L3, the length of the tapered section is L4, and the length of the equal-diameter section is L5, wherein L1> L3> L5> L4= L2.

Use the technical scheme of the utility model, the check valve includes valve body and case, the circulation chamber of valve body adopts the venturi structure, the valve body includes the inducer promptly, aditus laryngis section and export section, the inducer includes the convergent section, the export section includes the divergent section, when the fluid normally flows at the circulation intracavity, the case is located the open position with aditus laryngis section separation, the fluid passes through aditus laryngis section flow direction divergent section from the convergent section in proper order, when no fluid flow was out of the circulation intracavity, the case replies to the sealing position with aditus laryngis section laminating, and then can prevent the fluid backward flow in the divergent section and flow to the convergent section through aditus laryngis section. Because set up the check valve into case and valve body matched with structure, realize the function that the check valve prevented the fluid backward flow, and then need not design the valve block, consequently there is not the valve block to break and become invalid.

Drawings

The accompanying drawings, which form a part of the present application, 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. In the drawings:

fig. 1 shows a cross-sectional view of a check valve provided by an embodiment of the present invention;

FIG. 2 shows a cross-sectional view of the valve body of FIG. 1;

fig. 3 shows a schematic view of the valve cartridge of fig. 1.

Wherein the figures include the following reference numerals:

10. a valve body; 11. a flow-through chamber; 12. an inlet section; 121. a tapered section; 122. a constant diameter section; 13. a throat section; 14. an outlet section; 141. a gradual expansion section; 142. a diffusion section;

20. a valve core; 21. a conical section; 211. spherical recess; 22. a cylindrical section;

30. a support; 31. a guide hole;

40. a return spring;

l1, the length of the diffusion section; l2, the length of the divergent section; l3, the length of the throat section; l4, length of the tapered section; l5, length of the constant diameter section;

a1, a divergent angle of a divergent section; and A2, a diffusion angle of the diffusion section.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

As shown in fig. 1 to fig. 3, an embodiment of the present invention provides a check valve, the check valve includes a valve body 10 and a valve core 20, the valve body 10 has a flow cavity 11 extending along an axial direction thereof, the flow cavity 11 includes an inlet section 12, a throat section 13 and an outlet section 14, the inlet section 12 includes a tapered section 121, the outlet section 14 includes a gradually expanding section 141, two ends of the throat section 13 are respectively connected with the tapered section 121 and the gradually expanding section 141, in a direction of the inlet section 12 pointing to the outlet section 14, a cross-sectional size of the tapered section 121 is gradually reduced, a cross-sectional size of the gradually expanding section 141 is gradually increased, the valve core 20 movably penetrates through the throat section 13 along the axial direction of the valve body 10, and the valve core 20 has a sealing position attached to the throat section 13 and an opening position separated from the throat section 13.

Use the technical scheme of the utility model, the check valve includes valve body 10 and case 20, circulation chamber 11 of valve body 10 adopts the venturi structure, valve body 10 includes inducer 12 promptly, larynx section 13 and export section 14, inducer 12 includes convergent section 121, export section 14 includes divergent section 141, when the fluid normally flows in circulation chamber 11, case 20 is located the open position with 13 phase separations of larynx section, the fluid is in proper order from convergent section 121 through 13 flow direction convergent sections 141 of larynx section, when no fluid flows through in circulation chamber 11, case 20 replies to the sealing position of laminating mutually with larynx section 13, and then can prevent the fluid backward flow in the divergent section 141 and flow back to convergent section 121 through larynx section 13. As the check valve is of a structure that the valve core 20 is matched with the valve body 10, the function of preventing the backflow of fluid of the check valve is realized, and further, a valve plate does not need to be designed, so that the check valve does not have the problem that the valve plate is broken and fails.

In addition, as the flow area between the valve plate and the valve core of the one-way valve in the related art is too small, throttling loss is generated, and fluid generates large pressure loss after passing through the one-way valve. The check valve of the present embodiment is configured such that the valve element 20 and the valve body 10 cooperate with each other, and thus, when fluid flows in the flow-through chamber 11, pressure loss is small.

In the present exemplary embodiment, the sealing position of the valve slide 20 with the throat section 13 is located on the side of the throat section 13 facing the outlet section 14.

As shown in fig. 1 and 2, the outlet section 14 further includes a diffuser section 142, two ends of the diverging section 141 are respectively connected to the throat section 13 and the diffuser section 142, the cross-sectional dimension of the diffuser section 142 is gradually increased in a direction in which the inlet section 12 points to the outlet section 14, and the length dimension of the diffuser section 142 is greater than that of the diverging section 141. The pressure of the fluid may be restored in the diffuser section 142 to reduce the pressure loss associated with the fluid flowing through the throat section 13.

As shown in fig. 2, the diffuser section has a length L1, the diverging section has a length L2, and the ratio of L1 to L2 is between 7 and 10. With the diffuser section 142 and the diverging section 141 having the ratio range, the pressure of the fluid in the diffuser section 142 can be recovered as much as possible, thereby reducing the pressure loss of the check valve. If the ratio of L1 to L2 is less than 7, the flow path for pressure recovery provided by the diffuser section 142 is shorter, and the fluid forms a larger pressure loss in the check valve; if the ratio of L1 to L2 is greater than 10, the volume of the check valve may be too large.

Wherein, the ratio of L1 to L2 may be any value between 7, 8, 9, 10 and 7 to 10.

In this embodiment, an included angle between the sidewall of the diverging section 141 and the axis of the circulation chamber 11 is a diverging angle A1 of the diverging section, and an included angle between the sidewall of the diffusing section 142 and the axis of the circulation chamber 11 is a diffusing angle A2 of the diffusing section, where A1> A2, and with the above angle setting, the length of the diffusing section 142 can be increased as much as possible under the condition that the length of the circulation chamber 11 is fixed, and the diffusing angle is reduced, so that the pressure recovery of the fluid can be increased, and the pressure loss of the pipeline caused by the check valve can be reduced.

It should be noted that the divergent section 141 is of an arc structure, and the throat section 13 is connected to the diffuser section 142 by the divergent section 141 of the arc structure, so that the divergent angle A1 of the divergent section can be further increased, and the diffuser angle A2 of the diffuser section can be further decreased. The diffuser angle A2 of the diffuser section can be made smaller compared to other connection structures, further reducing the pressure loss of the fluid in the check valve.

As shown in fig. 2, the diffuser section has a diffuser angle A2 in the range of 5 ° to 10 °. By adopting the diffusion angle within the angle range, the length of the diffusion section 142 can be longest in a check valve with a certain length and size, and the pressure of the fluid can be recovered to the greatest extent. If the angle of the diffusion angle A2 of the diffusion section is less than 5 °, it is not favorable for the fluid to recover the pressure in the diffusion section 142, and if the angle of the diffusion angle A2 of the diffusion section is greater than 10 °, in a check valve with a certain length and size, the length of the diffusion section 142 is too small, which is also not favorable for the fluid to recover the pressure in the diffusion section 142.

Wherein, the diffusion angle A2 of the diffusion section can be in the range of 5 degrees, 6 degrees, 7 degrees, 8 degrees, 9 degrees, 10 degrees and any value between 5 degrees and 10 degrees.

As shown in fig. 1 and 2, the throat section 13 increases in cross-sectional size first decreasing in the direction from the entrance section 12 to the exit section 14. The two ends of the throat section 13 adopting the above structure can be smoothly connected with the tapered section 121 and the diverging section 141 respectively, so that the pressure loss of the fluid in the check valve can be reduced.

In this embodiment, the tapered section 121 and the diverging section 141 are both designed to have an arc structure, the tapered section 121 and the throat section 13 are connected smoothly, the diverging section 141 and the throat section 13 are connected smoothly, and the diverging section 141 and the diffuser section 142 are connected smoothly, so that the sidewall of the circulation chamber 11 is smooth by adopting the above structure, and thus, the fluid does not generate pressure loss in the circulation chamber 11.

As shown in fig. 2, the inlet section 12 further includes a constant diameter section 122, and both ends of the tapered section 121 are respectively connected to the constant diameter section 122 and the throat section 13, and the cross-sectional dimension of the constant diameter section 122 is constant in a direction from the inlet section 12 to the outlet section 14. By utilizing the equal-diameter section 122, the pipeline and the equal-diameter section 122 of the one-way valve can form transition connection, so that the fluid can not generate energy loss after entering the one-way valve through the equal-diameter section 122 from the pipeline.

In the present embodiment, the constant diameter section 122 and the tapered section 121 are smoothly connected, so that no pressure loss is generated in the fluid flowing through the cavity 11.

As shown in fig. 1 and 3, the valve core 20 includes a conical section 21 movably disposed through the throat section 13, the cross-sectional size of the conical section 21 gradually increases in a direction from the inlet section 12 to the outlet section 14, and the conical section 21 has a sealing position in contact with the throat section 13 and an opening position separated from the throat section 13. By adopting the valve core 20 with the structural design, the conical section 21 and the throat section 13 have larger contact area, so that the effect of the check valve is better.

And, compare the check valve among the correlation technique, along with the increase of live time, the laminating degree of valve block and valve body is more and more poor for the check valve effect variation, the check valve in this embodiment, conical section 21 and larynx mouth section 13 have good laminating degree all the time, can not be along with the increase of live time, make the effect variation of check valve.

As shown in fig. 1, the check valve further includes a seat 30, the seat 30 is disposed in the tapered section 121 and connected to an inner sidewall of the tapered section 121, the seat 30 has a guide hole 31, the valve element 20 further includes a cylindrical section 22, the cylindrical section 22 is connected to an end of the conical section 21 facing the inlet section 12, the cylindrical section 22 is movably disposed through the guide hole 31, and the seat 30 can support the valve element 20, which is beneficial to movement of the valve element 20 in the flow-through chamber 11.

In the present embodiment, one end of the conical section 21 facing the outlet section 14 has a spherical recess 211, an axis of the spherical recess 211 coincides with an axis of the conical section 21, and the spherical recess 211 can reduce the weight of the conical section 21, so that the valve element 20 can move more flexibly.

As shown in fig. 1, the check valve further includes a return spring 40, the return spring 40 is disposed between the valve core 20 and the valve body 10, and when no fluid flows through the check valve, the return spring 40 can use the self-restoring force of the spring to make the valve core 20 of the check valve fit with the throat section 13, and is in a sealed position, so as to prevent the fluid from flowing back.

In the present embodiment, the return spring 40 is disposed on the cylindrical section 22, one end of the return spring 40 abuts against the side wall of the seat 30, and the other end of the return spring 40 does not move axially relative to the valve core.

The check valve further comprises a pressing piece, the pressing piece is connected with one end, facing the inlet section 12, of the cylindrical section 22, one end of the return spring 40 is abutted to the pressing piece, the other end of the return spring 40 is abutted to the support, and the pressing piece can be a pressing bolt or a pressing nut.

As shown in fig. 1 and fig. 2, the inlet section 12 further includes an equal-diameter section 122, two ends of the tapered section 121 are respectively connected to the equal-diameter section 122 and the throat section 13, the length of the diffuser section is L1, the length of the tapered section is L2, the length of the throat section is L3, the length of the tapered section is L4, and the length of the equal-diameter section is L5, wherein L1> L3> L5> L4= L2. With the check valve of the above-described structure, pressure loss generated when the fluid flows in the circulation chamber 11 is small, and the pressure of the fluid can be restored to reduce the pressure loss of the fluid in the check valve.

In this embodiment, flanges are connected to both ends of the constant diameter section 122 and the diffuser section 142, and the flanges are connected to the pipeline.

Adopt the utility model provides a check valve has following beneficial effect:

(1) The check valve is set to be of a structure that the valve core 20 is matched with the valve body 10, the function of preventing the backflow of fluid of the check valve is realized, and a valve plate is not required to be designed, so that the check valve is free from failure caused by breakage of the valve plate, and the conical section 21 and the throat opening section 13 always have good fitting degree, so that the effect of the check valve is not deteriorated along with the increase of the service time;

(2) The reducing section 121 and the gradually expanding section 141 are both designed in an arc structure, the reducing section 121 and the throat section 13 are smoothly connected, the gradually expanding section 141 and the pressure expanding section 142 are smoothly connected, and the constant diameter section 122 and the reducing section 121 are smoothly connected, so that pressure loss of fluid in the circulating cavity 11 cannot be caused;

(3) The throat section 13 is connected with the diffuser section 142 by the divergent section 141 with an arc structure, the divergent angle A1 of the divergent section can be further increased, the diffuser angle A2 of the diffuser section can be reduced, and the length of the diffuser section 142 can be increased as much as possible under the condition that the length of the circulation cavity 11 is fixed, so that the pressure recovery of fluid can be increased, and the pressure loss of a pipeline caused by a one-way valve can be reduced.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

Unless specifically stated otherwise, the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the orientation words such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, and in the case of not making a contrary explanation, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be interpreted as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

For ease of description, spatially relative terms such as "over … …", "over … …", "over … …", "over", etc. may be used herein to describe the spatial positional relationship of one device or feature to another device or feature as shown in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and if not stated otherwise, the terms have no special meaning, and therefore, the scope of the present invention should not be construed as being limited.

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

Claims

1. A one-way valve, comprising:

a valve body (10) having a flow-through cavity (11) extending axially along the valve body, wherein the flow-through cavity (11) comprises an inlet section (12), a throat section (13) and an outlet section (14), the inlet section (12) comprises a tapered section (121), the outlet section (14) comprises a diverging section (141), two ends of the throat section (13) are respectively connected with the tapered section (121) and the diverging section (141), the cross-sectional dimension of the tapered section (121) is gradually reduced, and the cross-sectional dimension of the diverging section (141) is gradually increased in a direction in which the inlet section (12) points to the outlet section (14);

the valve core (20) is movably arranged in the throat section (13) in a penetrating mode along the axial direction of the valve body (10), and the valve core (20) is provided with a sealing position attached to the throat section (13) and an opening position separated from the throat section (13).

2. The check valve of claim 1, wherein the outlet section (14) further comprises a diffuser section (142), the diffuser section (142) is connected to the throat section (13) and the diffuser section (142) at two ends, respectively, the diffuser section (142) has a cross-sectional dimension that gradually increases in a direction from the inlet section (12) toward the outlet section (14), and the diffuser section (142) has a length dimension that is greater than a length dimension of the diffuser section (141).

3. The check valve of claim 2, wherein the diffuser section has a length L1, the diverging section has a length L2, and a ratio of L1 to L2 is between 7 and 10.

4. The check valve of claim 2, wherein a diffuser angle of the diffuser section ranges between 5 ° and 10 °.

5. A non-return valve according to claim 1, characterised in that the cross-sectional dimension of the throat section (13) decreases and increases in the direction in which the inlet section (12) is directed towards the outlet section (14).

6. The non-return valve according to claim 1, characterized in that the inlet section (12) further comprises a constant diameter section (122), the tapered section (121) being connected at both ends with the constant diameter section (122) and the throat section (13), respectively, the constant diameter section (122) having a constant cross-sectional dimension in a direction from the inlet section (12) to the outlet section (14).

7. A one-way valve according to claim 1, wherein the valve spool (20) comprises a conical section (21) movably disposed through the throat section (13), the conical section (21) having a cross-sectional dimension that gradually increases in a direction from the inlet section (12) toward the outlet section (14), the conical section (21) having a sealing position in abutment with the throat section (13) and an open position spaced from the throat section (13).

8. The one-way valve of claim 7,

the check valve further comprises a support (30), the support (30) is arranged in the tapered section (121) and connected with the inner side wall of the tapered section (121), the support (30) is provided with a guide hole (31), the valve core (20) further comprises a cylindrical section (22), the cylindrical section (22) is connected with one end, facing the inlet section (12), of the conical section (21), and the cylindrical section (22) is movably arranged in the guide hole (31) in a penetrating mode; and/or the presence of a gas in the gas,

one end of the conical section (21) facing the outlet section (14) is provided with a spherical recess (211), and the axis of the spherical recess (211) is coincident with the axis of the conical section (21).

9. The check valve according to any of claims 1 to 8, further comprising a return spring (40), the return spring (40) being disposed between the spool (20) and the valve body (10).

10. The check valve of claim 2, wherein the inlet section (12) further comprises an equal diameter section (122), the tapered section (121) is connected at both ends thereof to the equal diameter section (122) and the throat section (13), respectively, the diffuser section has a length of L1, the tapered section has a length of L2, the throat section has a length of L3, the tapered section has a length of L4, and the equal diameter section has a length of L5, wherein L1> L3> L5> L4= L2.