CN212080251U

CN212080251U - One-way valve and combined valve with same

Info

Publication number: CN212080251U
Application number: CN202020529325.XU
Authority: CN
Inventors: 俞舟; 冯忠波; 康志军
Original assignee: Dunan Environment Technology Co Ltd
Current assignee: Dunan Environment Technology Co Ltd
Priority date: 2020-04-10
Filing date: 2020-04-10
Publication date: 2020-12-04
Anticipated expiration: 2030-04-10

Abstract

The utility model provides a check valve and have its combination valve, this check valve includes: a housing having an inlet end, an outlet end, and a cavity; the piston assembly is movably arranged in the cavity and provided with a blocking position for blocking the inlet end and an opening position, and one end of the piston assembly, which faces the outlet end, is provided with a guide hole; the guide post is fixed to be set up in the cavity, and in the guide hole was worn to establish by the one end of guide post, the guide post was used for leading piston assembly, has the balancing hole on the guide post, the one end and the guide hole intercommunication in balancing hole, the other end and the exit end intercommunication in balancing hole. Through the technical scheme that this application provided, can solve the too big problem of check valve piston moving resistance among the prior art.

Description

One-way valve and combined valve with same

Technical Field

The utility model relates to a valve body technical field particularly, relates to a check valve and have its combination valve.

Background

Currently, the existing check valves include a valve body and a piston that moves within the valve body, the piston being used to open or close a valve port. In the prior art, in order to enable the piston to move stably, a guide structure is further arranged in the valve body, and the piston is matched with the guide structure so as to enable the piston to move along a preset direction. But the guide structure and the piston are matched to increase the moving resistance of the piston, thereby influencing the normal operation of the valve body.

SUMMERY OF THE UTILITY MODEL

The utility model provides a check valve and have its combination valve to solve the too big problem of check valve piston moving resistance among the prior art.

According to an aspect of the utility model, a check valve is provided, the check valve includes: a housing having an inlet end, an outlet end, and a cavity; the piston assembly is movably arranged in the cavity and provided with a blocking position for blocking the inlet end and an opening position, and one end of the piston assembly, which faces the outlet end, is provided with a guide hole; the guide post is fixed to be set up in the cavity, and in the guide hole was worn to establish by the one end of guide post, the guide post was used for leading piston assembly, has the balancing hole on the guide post, the one end and the guide hole intercommunication in balancing hole, the other end and the exit end intercommunication in balancing hole.

Further, the check valve further includes: the locating piece is arranged in the cavity, one end, far away from the piston assembly, of the guide column is fixedly connected with the locating piece, and the locating piece is used for fixing the position of the guide column in the cavity.

Further, the positioning member includes: the middle part of the positioning plate is provided with a connecting hole, and the end part of the guide post is penetrated in the connecting hole; the extension ends are annularly arranged at intervals on the periphery of the positioning plate, and the positioning plate is connected with the shell through the extension ends.

Furthermore, the inner wall of the inlet end and the outer wall of the piston assembly are both provided with a flow guide structure.

Further, the inner diameter of the inlet end gradually increases in a direction toward the outlet end, and the end diameter of the piston assembly near the inlet end gradually decreases toward the outlet end.

Further, the inner diameter of the inlet end gradually increases towards the fluid flow direction, the inner diameter of the outlet end gradually decreases towards the fluid flow direction, and the inner diameters of the inlet end and the outlet end are smaller than the inner diameter of the cavity.

Further, the piston assembly includes: one end of the piston rod, which faces the outlet end, is provided with a guide hole; a seal disposed at an end of the piston rod proximate the inlet end; and the gasket is arranged on the piston rod and used for fixing the position of the sealing element on the piston rod.

Furthermore, a connecting convex part is arranged at the end part of the piston rod close to the inlet end, the sealing element and the gasket are sleeved on the connecting convex part, and the gasket is positioned on one side of the sealing element close to the inlet end.

Further, the housing includes a valve cover and a body, the valve cover being interconnected with the body, the valve cover having an inlet end.

According to another aspect of the present invention, there is provided a combination valve, comprising: a pilot valve; the pilot valve is communicated with the inside of the main valve through a capillary tube, an inlet connecting pipe and an outlet connecting pipe are arranged on the main valve, the inlet connecting pipe is positioned on one side of the main valve, and the outlet connecting pipe is positioned on the other side of the main valve; the one-way valve is connected with the inlet connecting pipe and is the one-way valve provided by the above.

Use the technical scheme of the utility model, this check valve includes the casing, piston assembly and guide post, be provided with the guiding hole on the piston assembly, piston assembly passes through the guiding hole and is connected with the guide post, piston assembly utilizes the guide post to lead, so that piston assembly steady movement, still be provided with the balancing hole on the guide post, the one end and the exit end intercommunication in balancing hole, the other end and the guiding hole intercommunication in balancing hole, it can make the guiding hole pass through balancing hole and exit end intercommunication to set up like this, the export distolateral low pressure side that is, so be convenient for piston assembly moves between entrance point and exit end, piston assembly's resistance has been reduced, guarantee that piston assembly can normally open the valve port.

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 schematic structural diagram of a check valve provided by the present invention;

FIG. 2 shows a schematic structural view of the piston assembly of FIG. 1;

FIG. 3 shows a schematic view of the guide post of FIG. 1;

FIG. 4 is a schematic view of the positioning member of FIG. 1;

fig. 5 shows a schematic structural diagram of a combination valve provided by the present invention.

Wherein the figures include the following reference numerals:

10. a housing; 101. an inlet end; 102. an outlet end; 11. a valve cover; 12. a main body;

21. a piston rod; 211. a guide hole; 212. a connecting projection; 22. a seal member; 23. a gasket;

30. a guide post; 31. a balance hole;

40. a positioning member; 41. positioning a plate; 411. connecting holes; 42. an extension end;

50. a flow guide structure;

60. a main valve; 61. an inlet connection pipe; 62. an outlet connection pipe.

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, an embodiment of the present invention provides a check valve, which includes: housing 10, piston assembly and guide post 30. Wherein the housing 10 has an inlet end 101, an outlet end 102, and a cavity. A piston assembly is movably arranged in the cavity, the piston assembly having a blocking position blocking the inlet end 101 and an open position, and an end of the piston assembly facing the outlet end 102 is provided with a guide hole 211. The guide post 30 is fixedly arranged in the cavity, one end of the guide post 30 penetrates through the guide hole 211, the guide post 30 is used for guiding the piston assembly, a balance hole 31 is formed in the guide post 30, one end of the balance hole 31 is communicated with the guide hole 211, and the other end of the balance hole 31 is communicated with the outlet end 102.

The end of the balancing hole 31 communicating with the outlet end 102 may be disposed on the sidewall of the guide post 30 or on the end surface of the guide post 30. In this embodiment, the balance hole 31 penetrates through the two ends of the guide column 30 along the axis of the guide column 30, so that the balance hole 31 is closer to the outlet end 102, the pressure in the guide hole 211 is close to the pressure of the outlet end 102, the lower pressure in the guide hole 211 is ensured, and the normal translation of the piston assembly is ensured.

With the above structure, the piston assembly can be guided by the guide post 30 so as to be stably moved in the cavity; by utilizing the balance hole 31 on the guide post 30, the guide hole 211 can be communicated with the outlet end 102, the outlet end 102 is a low-pressure side, and further the interior of the guide hole 211 is low-pressure, so that the resistance to the piston assembly can be reduced, the piston assembly can move between the inlet end 101 and the outlet end 102 conveniently, and the normal operation of the check valve is ensured.

The check valve further comprises a positioning member 40, the positioning member 40 is arranged in the cavity, one end, far away from the piston assembly, of the guide column 30 is fixedly connected with the positioning member 40, and the positioning member 40 is used for fixing the position of the guide column 30 in the cavity. The guide post 30 may be secured within the cavity by the provision of the securing member 40.

As shown in fig. 4, the positioning member 40 includes: a positioning plate 41 and a plurality of extension ends 42. The positioning plate 41 has a connecting hole 411 at the middle portion thereof, and the end of the guide post 30 is inserted into the connecting hole 411. A plurality of extension ends 42 are annularly provided at intervals on the periphery of the positioning plate 41, and the positioning plate 41 is connected to the housing 10 through the plurality of extension ends 42. Specifically, the guide posts 30 and the positioning plate 41 may be riveted or welded. The plurality of extensions 42 may be fixedly coupled to the housing 10 by a press roller, or may be coupled by welding or fastening. Through the structure, the positioning piece 40 can be ensured to fix the guide column 30, a larger flow area can be provided for fluid flow, and the resistance of the positioning piece 40 to the fluid is reduced.

Wherein, the inner wall of the inlet end 101 and the outer wall of the piston assembly are both provided with a flow guiding structure 50. Through the arrangement of the flow guide structure 50, the resistance of the interior of the valve body to the fluid can be reduced, and the bleeding and turbulent flow of the fluid in the valve body can be avoided.

Specifically, the inner diameter of the inlet end 101 increases gradually in a direction toward the outlet end 102, and the diameter of the end of the piston assembly near the inlet end 101 decreases gradually toward the outlet end 102. The fluid is guided by the structure, so that the fluid can flow along the inclined plane formed by the structure, and turbulence of the fluid in the flowing process is avoided.

In this embodiment, the inner diameter of the inlet end 101 gradually increases toward the direction of fluid flow, the inner diameter of the outlet end 102 gradually decreases toward the direction of fluid flow, and the inner diameters of the inlet end 101 and the outlet end 102 are smaller than the inner diameter of the cavity. Specifically, both ends of the housing 10 are formed in a bell mouth structure to buffer and guide the fluid. The casing 10 is set to be a structure with two small ends and a large middle part, so that resistance to fluid formation due to the fact that the piston assembly is arranged in the middle of the casing 10 can be reduced, and fluid can smoothly flow in the valve body.

As shown in fig. 2, the piston assembly includes: a piston rod 21, a seal 22 and a gasket 23. The end of the piston rod 21 facing the outlet end 102 is provided with a guide hole 211, the sealing member 22 is arranged at the end of the piston rod 21 close to the inlet end 101, and a gasket 23 is arranged on the piston rod 21, the gasket 23 being used for fixing the position of the sealing member 22 on the piston rod 21. The sealing effect of the piston rod 21 on the inlet end 101 can be improved by providing the sealing member 22.

Specifically, the end of the piston rod 21 close to the inlet end 101 is provided with a connecting protrusion 212, the sealing element 22 and the gasket 23 are both sleeved on the connecting protrusion 212, and the gasket 23 is located on the side of the sealing element 22 close to the inlet end 101. By providing the coupling protrusion 212, a coupling structure may be provided for the sealing member 22 and the gasket 23, facilitating the disposition of the sealing member 22 at the end of the piston rod 21.

As shown in fig. 3, the guiding post 30 has a step structure, and the diameter of the end portion of the guiding post 30 near the outlet end is smaller than the diameter of the middle portion of the guiding post 30, so that the guiding post 30 is connected with the positioning member 40. The balance hole 31 may be a straight hole or a stepped hole.

In this embodiment, the housing 10 includes a valve cover 11 and a main body 12, the valve cover 11 and the main body 12 being interconnected, the valve cover 11 having an inlet end 101. By providing the housing 10 in two parts, it is possible to facilitate the installation of the piston assembly and the retainer 40 in the housing 10, and the installation of the valve cover 11 on the body 12 after the fixing of the internal components is completed.

As shown in fig. 5, another embodiment of the present application provides a combination valve including: pilot valve, main valve 60, and check valve. The pilot valve is communicated with the interior of the main valve 60 through a capillary tube, an inlet connecting pipe 61 and an outlet connecting pipe 62 are arranged on the main valve 60, the inlet connecting pipe 61 is positioned on one side of the main valve 60, and the outlet connecting pipe 62 is positioned on the other side of the main valve 60; a check valve is connected to the inlet connection tube 61, and the check valve is the one-way valve provided in the above embodiment. Through the structure, the fluid can be unidirectionally controlled through the one-way valve, and the backflow of the fluid is avoided.

Through the device that this application provided, set up the balancing hole on the guide post to set up the one end in balancing hole near the exit end, get pressure point pressure like this and lower, more help opening of piston rod, be the high pressure side again when the check valve is reverse to be closed simultaneously, help the check valve reverse to end and close the piston rod. Therefore, the design has good improvement effect on both forward opening and reverse stopping of the check valve. The inlet end is provided with the guide structure, so that the eddy current loss is reduced, the fluid can flow linearly, the flow resistance is reduced, and the flow capacity is higher. Meanwhile, the piston rod is also provided with a guide structure, so that the eddy loss can be reduced, the flow resistance is reduced, and the circulation capacity is improved. And the one-way valve is more compact, the pressure drop is smaller and the system efficiency is higher by utilizing the structure.

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 those 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.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated 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 … …" can include both an orientation 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 housing (10) having an inlet end (101), an outlet end (102), and a cavity;

a piston assembly movably arranged in the cavity, wherein the piston assembly has a blocking position for blocking the inlet end (101) and an open position, and a guide hole (211) is arranged at one end of the piston assembly facing the outlet end (102);

guide post (30), fixed setting is in the cavity, the one end of guide post (30) is worn to establish in guiding hole (211), guide post (30) are used for right piston assembly leads, balancing hole (31) have on guide post (30), the one end of balancing hole (31) with guiding hole (211) intercommunication, the other end of balancing hole (31) with exit end (102) intercommunication.

2. The one-way valve of claim 1, further comprising:

the positioning piece (40) is arranged in the cavity, one end, far away from the piston assembly, of the guide column (30) is fixedly connected with the positioning piece (40), and the positioning piece (40) is used for fixing the position of the guide column (30) in the cavity.

3. A one-way valve according to claim 2, wherein the positioning member (40) comprises:

the middle part of the positioning plate (41) is provided with a connecting hole (411), and the end part of the guide column (30) is arranged in the connecting hole (411) in a penetrating way;

a plurality of extension ends (42), the plurality of extension ends (42) are annularly arranged at intervals on the periphery of the positioning plate (41), and the positioning plate (41) is connected with the shell (10) through the plurality of extension ends (42).

4. The non-return valve of claim 1, wherein the inlet end (101) is provided with a flow guide (50) on its inner wall and on its outer wall.

5. A check valve as claimed in claim 4, wherein the inlet end (101) has an internal diameter which increases progressively in a direction towards the outlet end (102), and the end of the piston assembly adjacent the inlet end (101) has a diameter which decreases progressively towards the outlet end (102).

6. The check valve of claim 1, wherein the inlet end (101) has an inner diameter that gradually increases toward the direction of fluid flow, the outlet end (102) has an inner diameter that gradually decreases toward the direction of fluid flow, and the inlet end (101) and the outlet end (102) each have an inner diameter that is less than the inner diameter of the cavity.

7. The one-way valve of claim 1, wherein the piston assembly comprises:

a piston rod (21), one end of the piston rod (21) facing the outlet end (102) being provided with the guide hole (211);

a seal (22) arranged at an end of the piston rod (21) near the inlet end (101);

a washer (23) provided on the piston rod (21), the washer (23) being for fixing the position of the seal (22) on the piston rod (21).

8. The check valve of claim 7, wherein the end of the piston rod (21) close to the inlet end (101) is provided with a connecting protrusion (212), the sealing element (22) and the gasket (23) are both sleeved on the connecting protrusion (212), and the gasket (23) is located on the side of the sealing element (22) close to the inlet end (101).

9. The one-way valve according to claim 1, wherein the housing (10) comprises a valve cover (11) and a main body (12), the valve cover (11) being interconnected with the main body (12), the valve cover (11) having the inlet end (101).

10. A combination valve, comprising:

a pilot valve;

the pilot valve is communicated with the inside of the main valve (60) through a capillary tube, an inlet connecting pipe (61) and an outlet connecting pipe (62) are installed on the main valve (60), the inlet connecting pipe (61) is positioned on one side of the main valve (60), and the outlet connecting pipe (62) is positioned on the other side of the main valve (60);

a one-way valve connected to the inlet connection (61), the one-way valve being as claimed in any one of claims 1 to 9.