CN214889090U

CN214889090U - Check valve

Info

Publication number: CN214889090U
Application number: CN202121238751.9U
Authority: CN
Inventors: 崔仕章; 侯云福; 程海鹏; 刘毅; 高琪琪
Original assignee: Shandong Deshi Petroleum Equipment Co ltd; Deshi Energy Technology Group Co Ltd; Shandong Deshi Chemical Co Ltd
Current assignee: Shandong Deshi Petroleum Equipment Co ltd
Priority date: 2021-06-03
Filing date: 2021-06-03
Publication date: 2021-11-26
Anticipated expiration: 2031-06-03

Abstract

The application discloses check valve, it includes: the valve body is provided with a liquid inlet and a liquid outlet, a cavity is formed inside the valve body, and the cavity is respectively communicated with the liquid inlet and the liquid outlet; the non-return assembly is arranged in the cavity and comprises a sealing seat and a sealing block, the sealing seat is arranged between the liquid inlet and the liquid outlet, and the sealing seat is provided with a sealing port; the sealing block is arranged between the sealing seat and the liquid outlet and can be far away from or close off the sealing port; the pushing assembly comprises a pushing rod, the pushing rod can enter the cavity, and the pushing rod is used for penetrating the sealing opening to push the sealing block to be far away from the sealing opening. The check valve can prevent the backflow of fluid and avoid damaging the front-end conveying equipment; in addition, cavity pressure release between sealed piece and the liquid outlet is convenient for, the maintenance of being convenient for.

Description

Check valve

Technical Field

The application relates to a check valve belongs to valve technical field.

Background

The check valve is a valve applied to a fluid pipeline to control the backflow of fluid, when the delivery pump is suddenly stopped, the fluid in the pipeline can quickly flow back under the pressure difference, and the check valve can prevent the backflow of the fluid. However, since the check valve is closed, high pressure exists in the pipeline, which is inconvenient for maintenance and construction, and when the check valve needs to be depressurized to deal with a failure, the tightly sealed check valve is difficult to open.

SUMMERY OF THE UTILITY MODEL

In order to solve the above problems, the present application proposes a check valve. The check valve can prevent the backflow of fluid and avoid damaging the front-end conveying equipment; in addition, cavity pressure release between sealed piece and the liquid outlet is convenient for, the maintenance of being convenient for.

According to an aspect of the present application, there is provided a check valve including:

the valve body is provided with a liquid inlet and a liquid outlet, a cavity is formed inside the valve body, and the cavity is respectively communicated with the liquid inlet and the liquid outlet;

the non-return assembly is arranged in the cavity and comprises a sealing seat and a sealing block, the sealing seat is arranged between the liquid inlet and the liquid outlet, two ends of the sealing seat are respectively in seamless connection with the inner wall of the cavity, and the sealing seat is provided with a sealing opening; the sealing block is arranged between the sealing seat and the liquid outlet and can be far away from or close off the sealing port;

the pushing assembly comprises a pushing rod, the pushing rod can enter the cavity, and the pushing rod is used for penetrating the sealing opening to push the sealing block to be far away from the sealing opening.

Optionally, the diameter of the cross section of the ejector pin is smaller than the bore diameter of the sealing port.

Optionally, the valve body further comprises a first through hole, and the ejector rod is in threaded connection with the first through hole.

Optionally, the ejector rod comprises a first connecting piece and a second connecting piece which are connected, the first connecting piece is in threaded connection with the first through hole, the first connecting piece and the second connecting piece are both cylindrical, and the diameter of the first connecting piece is smaller than that of the second connecting piece.

Optionally, the sealing opening is cylindrical, the sealing block is a spherical sealing block, a connecting plate is arranged at one end, close to the sealing opening, of the ejector rod, and the connecting plate is an arc-shaped connecting plate matched with the spherical sealing block.

Optionally, the pushing assembly further comprises a sealing ring and a sealing pressing cap, the sealing pressing cap is mounted on the outer side wall of the valve body, and the sealing ring is arranged between the sealing pressing cap and the pushing rod.

Optionally, the check assembly further comprises a cover body, the cover body is arranged above the sealing port and forms a limiting cavity with the sealing port, and the sealing block is arranged in the limiting cavity;

the lateral wall of the cover body is provided with at least one outlet.

Optionally, the liquid outlet is disposed above the liquid inlet.

Optionally, the liquid inlet with the liquid outlet sets up respectively the left and right sides of valve body, the ejector pin sets up the below of liquid outlet.

Optionally, the valve body further comprises a second through hole, and a plug is arranged in the second through hole.

Benefits that can be produced by the present application include, but are not limited to:

1. according to the check valve provided by the application, the sealing block can be far away from the sealing port by arranging the sealing block, so that the sealing block is far away from the sealing port under the flowing action of fluid, and the fluid is ensured to smoothly flow through the sealing port; the sealing opening can be sealed by arranging the sealing block, and when the conveying power of the fluid disappears, the sealing opening can be sealed by the sealing block under the pressure difference of the fluid, so that the backflow of the fluid is prevented, and the damage to the front-end conveying equipment is avoided; can pass the seal port through setting up the ejector pin to promote sealed piece and keep away from the seal port, realize the pressure release, avoid the cavity internal pressure between sealed piece and the liquid outlet too high, be convenient for maintain.

2. The check valve that this application provided, through setting up threaded connection between ejector pin and the first through-hole, guarantee that ejector pin can be stable be linear motion to guarantee can stabilize the sealed piece of top that pushes away at the uniform velocity, make the stable pressure release of this valve body, prevent that the pressure release is too fast, avoid the fluid to flow from sealed mouthful too fast and cause the damage to the conveying equipment of valve body or front end.

3. The application provides a check valve, the diameter through setting up first connecting piece is less than the diameter of second connecting piece, not only can reduce the trompil diameter of first through-hole, prevents that the fluid after the pressure release from leaking from first through-hole, can increase the area of contact of second connecting piece and seal block moreover, prevents to take place relative slip at top pushing in-process second connecting piece and seal block.

4. The check valve that this application provided, through setting up the sealing washer and sealed pressure cap, further with first through-hole sealed, prevent that fluid from leaking from first through-hole department.

5. According to the check valve provided by the application, the cover body is arranged, so that the sealing block is prevented from deviating from the sealing port under the action of fluid and cannot completely block the sealing port, and the check effect can be ensured; in addition, the outlet is arranged on the side wall of the cover body, so that fluid can smoothly flow from the liquid inlet to the liquid outlet.

6. The utility model provides a check valve through setting up the liquid outlet in the top of inlet, and sealed piece is located the top of sealing promptly, and after the power of carrying fluid disappears, sealed piece not only can be at the sealed mouth of shutoff under fluidic pressure differential effect, can be in the sealed department of sealing under the action of gravity of self moreover, further guarantees the non return effect, avoids leading to causing the damage to the conveying equipment of front end because of fluid leakage.

7. According to the check valve provided by the application, the sealing seat, the sealing block or the cover body in the cavity can be conveniently maintained by arranging the second through hole; in addition, the arrangement of the plug can effectively prevent the fluid from leaking.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:

FIG. 1 is a schematic view of a check valve according to an embodiment of the present application;

list of parts and reference numerals:

1. a valve body; 2. a liquid inlet; 3. a liquid outlet; 4. a sealing seat; 5. a sealing block; 6. pushing the push rod; 7. a handle; 8. a seal ring; 9. sealing the pressing cap; 10. a cover body; 11. an outlet; 12. and (5) plugging with a thread.

Detailed Description

In order to more clearly explain the overall concept of the present application, the following detailed description is given by way of example in conjunction with the accompanying drawings.

In order that the above objects, features and advantages of the present application can be more clearly understood, the present application will be described in further detail with reference to the accompanying drawings and detailed description. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application, however, the present application may be practiced in other ways than those described herein, and therefore the scope of the present application is not limited by the specific embodiments disclosed below.

In addition, in the description of the present application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", and the like, indicate orientations and positional relationships based on those shown in the drawings, are only for convenience of description and simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present application.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; the connection can be mechanical connection, electrical connection or communication; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," 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 the application. In this specification, the schematic representations of the terms used above are not necessarily intended to 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.

As shown in fig. 1, an embodiment of the present application discloses a check valve, which includes: valve body 1, non return subassembly and top push subassembly. Wherein, a liquid inlet 2 and a liquid outlet 3 are arranged on the valve body 1, a cavity is formed inside the valve body 1, and the cavity is respectively communicated with the liquid inlet 2 and the liquid outlet 3; the non-return assembly is arranged in the cavity and comprises a sealing seat 4 and a sealing block 5, the sealing seat 4 is arranged between the liquid inlet 2 and the liquid outlet 3, two ends of the sealing seat 4 are respectively connected with the inner wall of the cavity in a seamless mode, and the sealing seat 4 is provided with a sealing opening; the sealing block 5 is arranged between the sealing seat 4 and the liquid outlet 3, and the sealing block 5 can be far away from or close off the sealing port; the pushing assembly comprises a pushing rod 6, the pushing rod 6 can enter the cavity, and the pushing rod 6 is used for penetrating through the sealing opening to push the sealing block 5 to be far away from the sealing opening. The sealing block 5 can be far away from the sealing port, so that the sealing block 5 is far away from the sealing port under the flowing action of fluid, and the fluid is ensured to smoothly flow through the sealing port; the sealing opening can be sealed by arranging the sealing block 5, and when the conveying power of the fluid disappears, the sealing opening can be sealed by the sealing block 5 under the pressure difference of the fluid, so that the backflow of the fluid is prevented, and the damage to the front-end conveying equipment is avoided; can pass the seal port through setting up ejector pin 6 to promote sealed piece 5 and keep away from the seal port, realize the pressure release, avoid the cavity internal pressure between sealed piece 5 and the liquid outlet 3 too high, the maintenance of being convenient for.

The fluid flows through the sealing port through the liquid inlet 2, and the sealing block 5 is far away from the sealing port under the pressure action of the fluid, so that the fluid smoothly flows to the liquid outlet 3; when the conveying equipment stops suddenly, the sealing block 5 seals the sealing port under the action of fluid pressure difference; promote ejector pin 6, make ejector pin 6 promote sealed piece 5 and keep away from the sealing opening, make the fluid flow out from the gap between sealing opening and ejector pin 6 to realize the pressure release, be convenient for maintain.

Specifically, the shape of the sealing opening is not limited in this embodiment, and may be, for example, a circle, a square, a triangle, or the like, but is not limited to the above shape. Specifically, the shape of the sealing block 5 in this embodiment is not limited, and may be, for example, a sphere, a pyramid, a cube, or a cuboid, as long as the sealing port can be sealed.

Specifically, the sealing seat 4 and the inner wall of the cavity may be welded or detachably connected. In order to ensure the sealing performance in the embodiment, the sealing seat 4 is connected with the inner wall of the valve body 1 by welding.

Specifically, in order to facilitate the movement of the ejector rod 6 by an operator, one end of the ejector rod 6, which is far away from the sealing opening, is connected with a handle 7.

In one embodiment, the diameter of the cross-section of the ejector pin 6 is smaller than the diameter of the bore of the sealing opening. This mode of setting up can guarantee that ejector pin 6 gets into the seal opening smoothly, with sealed piece 5 from the seal opening jack-up to play the effect of pressure release.

Specifically, the connection manner between the ejector pin 6 and the valve body 1 is not limited in this embodiment, as long as the ejector pin 6 can eject the sealing block 5, and for example, the connection may be a sliding connection or a rotating connection.

As a preferred embodiment, the valve body 1 further comprises a first through hole, and the ejector rod 6 is in threaded connection with the first through hole. Through setting up threaded connection between ejector pin 6 and the first through-hole, guarantee that ejector pin 6 can be stable be linear motion to guarantee can stabilize top push sealing block 5 at the uniform velocity, make this valve body 1 stabilize the pressure release, prevent that the pressure release is too fast, avoid the fluid to flow out too fast from sealed mouthful and cause the damage to valve body 1 or the conveying equipment of front end.

As an embodiment, the ejector rod 6 includes a first connecting member and a second connecting member connected to each other, the first connecting member is in threaded connection with the first through hole, the first connecting member and the second connecting member are both cylindrical, and the diameter of the first connecting member is smaller than that of the second connecting member. The diameter through setting up first connecting piece is less than the diameter of second connecting piece, not only can reduce the trompil diameter of first through-hole, prevents that the fluid after the pressure release from leaking from first through-hole, can increase the area of contact of second connecting piece and seal block 5 moreover, prevents to take place relative slip at top pushing in-process second connecting piece and seal block 5.

As an embodiment not shown, the sealing opening is cylindrical, the sealing block 5 is a spherical sealing block 5, one end of the ejector rod 6 close to the sealing opening is provided with a connecting plate, and the connecting plate is an arc-shaped connecting plate matched with the spherical sealing block 5. Through setting up the arc connecting plate that the connecting plate is 5 adaptations with spherical sealed piece, make the surface of connecting plate contact spherical sealed piece 5 completely, reduce the relative rocking between sealed piece 5 and the connecting plate, prevent at the in-process sealed piece 5 of top from the landing on the connecting plate, guarantee the pressure release effect.

Specifically, the pushing assembly further comprises a sealing ring 8 and a sealing pressing cap 9, the sealing pressing cap 9 is installed on the outer side wall of the valve body 1, and the sealing ring 8 is arranged between the sealing pressing cap 9 and the pushing rod 6. By providing the seal ring 8 and the seal gland 9, the first through hole is further sealed, preventing fluid from leaking from the first through hole.

As an embodiment, the check assembly further comprises a cover body 10, the cover body 10 is arranged above the sealing port and forms a limiting cavity with the sealing port, and the sealing block 5 is arranged in the limiting cavity; the side wall of the enclosure 10 is provided with at least one outlet 11. By arranging the cover body 10, the sealing block 5 is prevented from deviating from the sealing port under the action of fluid and cannot completely block the sealing port, so that the non-return effect can be ensured; in addition, the outlet 11 is disposed on the side wall of the housing 10, so that the fluid can smoothly flow from the fluid inlet 2 to the fluid outlet 3.

Specifically, the number of the outlets 11 on the side wall of the cover 10 is not limited in this embodiment, as long as the fluid can pass through the outlets. Specifically, in the present embodiment, the shape of the cover 10 is not limited as long as the sealing block 5 can be prevented from deviating from the sealing opening, and may be, for example, a spherical cover 10 or a square cover 10. Further, the cover 10 in the present embodiment is a

square cover

10, and 3 outlets 11 are provided at the side wall of the cover 10.

In one embodiment, the liquid outlet 3 is disposed above the liquid inlet 2. Through setting up liquid outlet 3 in the top of inlet 2, sealed piece 5 is located the top of sealing, and after the power of carrying fluid disappeared, sealed piece 5 not only can be at the sealed mouthful of shutoff under the action of fluidic pressure differential, can be in the sealed department of sealing under the action of gravity of self moreover, further guarantees the non return effect, avoids leading to causing the damage to the conveying equipment of front end because of fluid leakage.

Specifically, the liquid inlet 2 and the liquid outlet 3 may be disposed on the same side of the valve body 1, or may be disposed on opposite sides of the valve body 1.

As an implementation mode, the liquid inlet 2 and the liquid outlet 3 are respectively arranged at the left side and the right side of the valve body 1, and the push rod 6 is arranged below the liquid outlet 3. Through setting up inlet 2 and liquid outlet 3 respectively in the left and right sides of valve body 1, reduce the fluid and be flowing through the pressure differential loss of this valve body 1, ensure that the fluid is more smooth flows to liquid outlet 3 from inlet 2.

As an embodiment, the valve body 1 further includes a second through hole, and a plug 12 is disposed in the second through hole. The sealing seat 4, the sealing block 5 or the cover body 10 in the cavity can be conveniently maintained by arranging the second through hole; in addition, the arrangement of the plug 12 can effectively prevent the fluid from leaking.

The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the system embodiment, since it is substantially similar to the method embodiment, the description is simple, and for the relevant points, reference may be made to the partial description of the method embodiment.

The above description is only an example of the present application and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. A check valve, comprising:

2. The check valve of claim 1, wherein a cross-sectional diameter of the ejector pin is smaller than an aperture of the sealing port.

3. The check valve of claim 1, wherein the valve body further comprises a first throughbore, the ejector pin being threadably connected to the first throughbore.

4. The check valve of claim 3, wherein the push rod comprises a first connector and a second connector connected to each other, the first connector is in threaded connection with the first through hole, the first connector and the second connector are both cylindrical, and the diameter of the first connector is smaller than that of the second connector.

5. The check valve of claim 1, wherein the sealing port is cylindrical, the sealing block is a spherical sealing block, and a connecting plate is arranged at one end of the ejector rod close to the sealing port and is an arc-shaped connecting plate matched with the spherical sealing block.

6. The check valve of any one of claims 1-5, wherein the jacking assembly further comprises a sealing ring and a sealing gland, the sealing gland being mounted on an outer sidewall of the valve body, the sealing ring being disposed between the sealing gland and the jacking rod.

7. The check valve of any of claims 1-5, wherein the check assembly further comprises a cover disposed over the sealing port and forming a spacing cavity with the sealing port, the sealing block being disposed within the spacing cavity;

the lateral wall of the cover body is provided with at least one outlet.

8. The check valve of any of claims 1-4, wherein the liquid outlet is disposed above the liquid inlet.

9. The check valve of claim 8, wherein the liquid inlet and the liquid outlet are disposed on left and right sides of the valve body, respectively, and the push rod is disposed below the liquid outlet.

10. The check valve of claim 9, wherein the valve body further comprises a second through bore having a plug disposed therein.