KR20220138449A - Check valve and manufacturing method thereof - Google Patents

Abstract

The present invention relates to a check valve, and a manufacturing method thereof. According to one embodiment of the present invention, the check valve comprises: a valve housing installed between pipes; an elastic member mounted inside the valve housing; and a check member coupled to and supported by the elastic member to open a flow passage inside the valve housing in one direction. According to the present invention, the present invention reduces the number of components and simplifies processes to be easily manufactured and significantly reduce cost.

Description

Check valve and manufacturing method thereof

The present invention relates to a check valve installed in a piping line to prevent backflow of a fluid, and more particularly, to a check valve capable of significantly reducing manufacturing costs by reducing the number of components and simplifying a process, and a manufacturing method thereof.

In general, a check valve is a valve that allows a fluid such as gas or liquid to flow in only one direction and prevents it from flowing in the opposite direction. It is installed in pipelines, etc., and is used to prevent backflow.

The check valve may be classified into a lift check valve, a swing check valve, an angle check valve, an in-line check valve, etc. according to the type of installation in the piping line and the operating structure.

Among these various types of check valves, in-line type check valves in particular have a structure that is installed in a straight line with a piping line, such as a piping line that mainly provides pneumatic or hydraulic pressure, or a piping line of an air conditioning system. to include a configuration in which the opening and closing member can elastically flow inside the valve housing connected in a straight line between the pipe lines.

However, in the conventional check valve, there is a problem in that the number of parts constituting the check valve is too large, and the manufacturing cost is increased because the manufacturing process of the check valve is also complicated.

That is, in the conventional check valve and its manufacturing process, time and cost are inevitably increased due to a large number of parts and a complicated manufacturing process, in particular, a large number of welding processes. There is a disadvantage in that the manufacturing cost is inevitably increased further.

In addition, since the conventional manufacturing process includes several welding operations, the deformation of the spring occurs due to the heat generated during welding, which leads to a decrease in the straightness of the spring and many defects in which the reverse flow prevention action is not precisely performed. There is a problem being

Laid-open Patent No. 10-2020-0063797: Check valve device

The present invention is proposed to solve the above-mentioned conventional problems, and an object of the present invention is to provide a check valve and a method for manufacturing the same, which can greatly reduce manufacturing time and manufacturing cost by minimizing the number of component parts and simplifying the manufacturing process. will provide

In addition, it is an object of the present invention to provide a check valve and a method of manufacturing the same that can be performed more smoothly for a long time without coupling the operation by preventing the occurrence of thermal deformation due to welding during manufacturing.

As a problem solving means of the present invention for achieving the above object,

Disclosed is a check valve comprising a valve housing installed between pipes, an elastic member mounted inside the valve housing, and a check member supported by being coupled to the elastic member to open a flow path inside the valve housing in only one direction.

Here, the valve housing is composed of a circular upper housing and a lower housing coupled to each other through screw fastening, and an annular opening and closing stone having a distribution port on the inner circumferential surface of the upper housing that opens and closes according to the close contact or separation of the check member Additional protrusions may be formed.

In addition, the check member has a hemispherical head portion, an insert portion extending downward by a predetermined length from the bottom surface of the head portion and inserted into the elastic member, and is formed to protrude stepwise from the upper end of the insert portion to the upper surface of the elastic member It includes a coupling step portion to be closely coupled, the flow port of the opening and closing protrusion may be formed with a streamlined inclined portion corresponding to the outer shape of the head portion so that the insertion and close contact of the head portion is possible.

In addition, the elastic member includes an annular seat body having a male screw part for mounting on its side surface, and a spring body integrally formed with the seat body so as to extend helically upward from the seat body, and the inner circumferential surface of the lower housing is for the mounting An annular support protrusion on which the seat body is seated and supported may protrude below the female screw for mounting while the female screw for mounting is formed to be coupled to the male screw.

In addition, the inner circumferential diameter of the seat body may be formed to be relatively smaller than the inner circumferential diameter of the support protrusion, and a pair of manipulation grooves may be formed on the bottom surface of the seat body at a position not to interfere with the support protrusion.

In addition, as a problem solving means of the present invention for achieving the above object,

A component processing and molding step of forming an upper housing, a lower housing, a check member, and an elastic member constituting the check valve through machining, respectively, and a check member coupling step of coupling the check member to the upper portion of the molded elastic member; A check comprising an elastic member mounting step of inserting the elastic member to which the check member is coupled into the lower housing and screwing it into place, and a housing coupling step of screwing the upper housing to the lower housing to which the elastic member is mounted. A method of manufacturing a valve is disclosed.

Here, in the part processing and molding step, the elastic member is formed integrally through machining with the annular seat body mounted on the lower housing through screw fastening and the spiral spring body elastically supporting the check member through machining. have.

According to the check valve and its manufacturing method according to the present invention,

Compared to the conventional valve configuration, the number of components is reduced, and the manufacturing process is also simplified compared to the conventional process, so that the check valve can be easily manufactured, thereby greatly reducing manufacturing time and manufacturing cost.

In addition, since generation of thermal deformation due to welding is prevented during manufacturing of the check valve, the straightness of the spring can be efficiently maintained, and accordingly, there is an advantage that a check operation can be performed smoothly for a long time without coupling the operation.

In addition, it is added that, in addition to the specifically stated effects as described above, the specific effects that can be easily derived and expected from the characteristic configuration of the present invention can also be included in the effects of the present invention.

1 is a view illustrating an appearance of a check valve according to an embodiment of the present invention,
2 is a view illustrating an exploded check valve according to an embodiment of the present invention,
Figure 3 is a view illustrating an example from the bottom side by disassembling the check valve according to an embodiment of the present invention,
4 is a cross-sectional view illustrating a closed state of the flow path of the check valve according to an embodiment of the present invention;
5 is a cross-sectional view illustrating an open state of a flow path of a check valve according to an embodiment of the present invention;
6 is a view illustrating an example of a method of manufacturing a check valve according to an embodiment of the present invention.

Hereinafter, a preferred embodiment of the check valve and its manufacturing method according to the present invention will be described in detail with reference to the accompanying drawings.

This embodiment is provided to more clearly explain the present invention to those with average knowledge in the art, and the shape, size, number, spacing between elements, etc. It may be reduced or exaggerated for emphasis, and it is not limited to the matters illustrated in the drawings unless specifically limited.

In addition, in describing the embodiment, if a component is described as “included”, “formed”, “installed”, “coupled”, “fixed”, or “connected” to another component, , may be provided, formed, installed, coupled, fixed, or connected directly to the other components, but it will be understood that other components may exist in the middle.

In addition, terms indicating directions such as front, back, left, right, top, bottom, etc. are used only to describe the directions shown and observed in the drawings, and if the directions shown and observed are changed, these terms may also vary. It should be understood that there is

In addition, when it is determined that the technical features of the present invention may be unnecessarily obscured as it is already apparent to those skilled in the art, such as a known function or a known configuration related in principle in describing the embodiment, the detailed description thereof A description will be omitted.

1 to 5, a preferred embodiment of the check valve 100 according to the present invention is exemplified.

As illustrated in the drawings, the check valve 100 according to an embodiment of the present invention may include a valve housing, an elastic member 30 and a check member 40 as a basic configuration.

The valve housing has the shape of a circular pipe, and may be installed by being coupled between the pipes so that an internal flow path communicates with the pipe line.

Such a valve housing may be configured to be separated into an upper housing 10 and a lower housing 20 each having the shape of a circular pipe, and the upper housing 10 and the lower housing 20 are to be coupled to each other through screw fastening. can

To this end, a female screw portion 11 for housing coupling is formed on the lower side of the inner circumferential surface of the upper housing 10 , and correspondingly, on the outer circumferential surface of the lower housing 10 , the female screw portion 11 for housing coupling and screw fastening are possible. A male screw portion 21 for coupling the housing may be formed.

In addition, an opening/closing protrusion 12 may be formed to protrude from the upper housing 10 on an inner peripheral surface of the upper side of the female screw part 11 for coupling the housing.

The opening/closing protrusion 12 is formed to protrude in an annular shape from the inner circumferential surface of the upper housing 10, and accordingly, the opening/closing protrusion 12 has a circular flow hole 13 at the center thereof.

The flow port 13 is closed when the check member 40, which will be described later, is inserted and closely adhered to the opening and closing protrusion 12, and is opened when spaced apart.

As will be described later, the head portion 41 of the check member 40 has a hemispherical shape, so that the head portion 41 is inserted into the flow port 13 to be in close contact with the flow port ( 13), a streamlined inclined portion 13a corresponding to the outer shape of the head portion 41 may be formed.

In addition, the lower housing 20 may have a female screw part 22 and a support protrusion 23 formed on the inner circumferential surface, respectively.

The mounting female screw portion 22 is formed on the inner circumferential surface of the lower housing 20, and may be screwed with the mounting male screw portion 32 formed on the seat body 31 of the elastic member 30 to be described later.

The support protrusion 23 may be formed to protrude in an annular shape from the inner circumferential surface of the lower lower housing 20 of the female screw part 22 for mounting.

The seat body 31 of the elastic member 30 to be described later is seated and supported on the support protrusion 23 .

On the other hand, since the upper and lower ends of the upper housing 10 and the lower housing 20 of the above configuration are connected to and coupled to the pipe, respectively, the upper inner peripheral surface of the upper housing 10 and the lower inner peripheral surface of the lower housing 20 are connected to the pipe Female threaded portions 14 and 24 for pipe connection for coupling may be formed, respectively.

The elastic member 30 is mounted inside the valve housing, and performs a function of elastically supporting the check member 40 .

The elastic member 30 may include a seat body 31 for mounting, and a spring body 33 for providing an elastic force.

The seat body 31 is formed in an annular shape, and has an outer circumferential diameter that can be inserted into the lower housing 20 .

A mounting male screw part 32 is formed on the outer circumferential surface of the seat body 31 , and the mounting male screw part 32 may be screw-fastened with the mounting female screw part 22 formed in the lower housing 20 .

That is, the seat body 31 is inserted into the lower housing 20 and mounted on the lower housing 20 through screw fastening between the male screw part 32 and the female screw part 22 for mounting. .

When the seat body 31 is screwed together in this way, the bottom surface of the seat body 31 is seated and supported on the support protrusion 23 of the lower housing 20, and accordingly, the solid mounting state of the seat body 31 is can be maintained

Here, the inner circumferential diameter of the seat body 31 may be formed to be relatively smaller than the inner circumferential diameter of the support protrusion 23 on which it is seated.

Accordingly, a portion of the bottom surface of the seat body 31 protrudes from the seated support protrusion 23 and does not receive interference. A pair of manipulation grooves 34 may be formed.

The pair of manipulation grooves 34 are grooves for applying a rotational force to the seat body 31 by inserting a tool from the lower side, and loosening the screw fastening of the mounted seat body 31 using these manipulation grooves 34 By giving, the seat body 31 can be easily separated from the lower housing 20 when necessary.

The spring body 33 may be formed to extend upwardly in a spiral form from the seat body 31 .

The spring body 33 elastically supports the check member 40 to be described later. That is, the lowering of the check member 40 is applied by being compressed by the fluid pressure when the fluid flows in the forward direction, and the check member 40 is raised to the win position by being elastically restored when the fluid flows in the reverse direction.

The spring body 33 may be formed integrally with the seat body 31 . That is, the seat body 31 and the spring body 33 may be formed as a single body by machining.

The check member 40 is coupled to and supported by the elastic member 30 to perform a function of opening the flow path inside the valve housing in only one direction.

That is, the check member 40 is spaced apart from the opening/closing protrusion 12 of the upper housing 10 when the fluid flows in the forward direction to open the distribution port 13, and is in close contact with the opening/closing protrusion 12 when the fluid flows in the reverse direction. By closing the sphere 13, the flow path is opened only in one direction.

For this, the check member 40 may include a head part 41 , an insert part 42 , and a coupling step part 43 .

The head part 41 has a hemispherical shape, and the insert part 42 may be formed to extend downward a predetermined length from the center of the bottom surface of the head part 41 .

The head part 41 is a part that opens and closes the distribution port 13 while being inserted in close contact with or spaced apart from the opening and closing protrusion 12 of the upper housing 10 .

The insert part 42 is a portion inserted into the inside of the elastic member 30 , that is, the spring body 33 , and thus the outer diameter of the insert part 42 may correspond to the inner diameter of the spring body 33 .

The coupling step portion 43 may be formed to protrude stepwise from the upper end of the insert portion 42 .

The coupling step 43 is a portion that is closely coupled to the upper surface of the elastic member, that is, the upper end of the spring body 33 , and thus the outer diameter of the coupling step 43 may correspond to the outer diameter of the spring body 33 . .

The upper housing 10 and the lower housing 20, the elastic member 30 and the check member 40 described above may all be formed of a synthetic resin material, specifically, a PVC material.

The check valve 100 of the present invention configured as described above is installed by coupling the valve housing to which the upper housing 10 and the lower housing 20 are coupled between the piping lines.

When the fluid flow in the forward direction occurs in the piping line in the state installed in the piping line in this way, as illustrated in FIG. 5 , the spring body 33 is compressed by the fluid pressure and the head portion 41 of the check member 40 . is spaced apart from the opening/closing protrusion 12, and by opening the flow port 13, it is operated so that the fluid flow in the forward direction is possible.

And when the fluid pressure disappears or the fluid flow in the reverse direction occurs, the head 41 is inserted into the opening and closing protrusion 12 while the compressed spring body 33 is restored to its original position, as illustrated in FIG. 4 . is closely adhered, and thus the flow port 13 is closed, thereby operating to hermetically block the flow of the fluid in the reverse direction.

On the other hand, FIG. 6 exemplifies a method of manufacturing the check valve 100 according to an embodiment of the present invention. Hereinafter, a method of manufacturing the check valve 100 of the present invention will be described with reference to this. .

The manufacturing method of the check valve 100 according to the present invention includes a part processing and molding step (S110) first, as illustrated in FIG. 6 .

In the parts processing and molding step (S110), the parts constituting the check valve 100, that is, the upper housing 10, the lower housing 20, the elastic member 30, and the check member 40 are machined through each will be molded

That is, by machining a cylindrical PVC raw material, the upper housing 10 and the lower housing 20 having a structure in which opening and closing protrusions 12 or support protrusions 23 are respectively formed on the inner circumferential surface are respectively molded.

In addition, the seat body 31 and the spring body 33 are machined in an integrated structure to form the elastic member 30, and the head part 41, the insert part 42, and the coupling step part 43 are The check member 40 is formed by machining in an integrated structure.

In particular, in the case of the elastic member 30, the annular seat body 31 mounted to the lower housing 20 through screw fastening, and the helical spring body 33 elastically supporting the check member 40 are machined. The molding is performed by being integrally formed through the

When the molding of each component is completed through machining in this way, the check member coupling step (S120) is then performed.

In this check member coupling step (S120), the check member 40 is coupled to the upper portion of the elastic member 30 .

Specifically, the check member 40 is coupled to the elastic member 30 by inserting the insert part 42 into the spring body 33 so that the coupling step 43 is in close contact with the upper end of the spring body 33 . Fix it. At this time, the coupling step 43 and the upper end of the spring body 33 of the check member 40 in close contact with each other can be firmly coupled and fixed through welding.

When the check member 40 is coupled to the elastic member 30 through the check member coupling step (S120), then the elastic member mounting step (S130) proceeds.

In this elastic member mounting step (S130), the elastic member 30 to which the check member 40 is coupled is inserted into the lower housing 20 to be mounted.

Specifically, after the seat body 31 is inserted into the lower housing 20 in a state in which the check member 40 is coupled and fixed to the upper end of the spring body 33 , the male screw part 32 for mounting and the female screw for mounting By screwing the part 22, the seat body 31 is fixed to the inside of the lower housing 20 in a state supported by the support protrusion 23, so that the mounting is performed.

When the mounting of the elastic member 30 is completed through the elastic member mounting step (S130), the housing coupling step (S140) is then performed.

In this housing coupling step (S140), the upper housing 10 is coupled to the lower housing 20 to form a valve housing.

That is, in this step (S140), the housing coupling male screw part 21 formed in the lower housing 20 and the housing coupling female screw part 11 formed in the upper housing 10 are mutually screwed into the lower housing 20 and It is to connect the upper housing (10).

When the coupling from the lower housing 20 to the upper housing 10 is made through the housing coupling step S140 in this way, the manufacturing of the check valve 100 according to the present invention is simply completed.

As described above, in the check valve and its manufacturing method of the present invention, the number of components constituting the valve is minimized compared to the conventional configuration, and the number of steps is also reduced compared to the conventional manufacturing process.

Accordingly, as the number of components and the number of manufacturing processes are greatly reduced, the manufacturing time can be shortened and the manufacturing cost can also be greatly reduced, and the welding process is also minimized. It can be seen that smooth operation can be made for a long time without worrying about thermal deformation problems.

The preferred embodiments of the present invention have been described in detail above, but the technical scope of the present invention is not limited to the contents described in the above-described embodiments and drawings, and may be modified or modified by those of ordinary skill in the art. It will be said that the changed equivalent configuration does not depart from the scope of the technical spirit of the present invention.

The reference numerals for the main parts of the accompanying drawings are as follows.
10: upper housing 11: female thread for housing coupling
12: opening and closing protrusion 13: distribution port
13a: inclined portion 20: lower housing
21: male thread for housing coupling 22: female thread for mounting
23: support protrusion 30: elastic member
31: seat body 32: male thread for mounting
33: spring body 40: check member
41: head portion 42: insert portion
43: coupling step part

Claims (6)

a valve housing installed between the pipes;
an elastic member 30 mounted inside the valve housing;
A check valve including; a check member (40) coupled to and supported by the elastic member (30) to open the flow path inside the valve housing in only one direction. The method of claim 1,
The valve housing consists of a circular upper housing 10 and a lower housing 20 coupled to each other through screw fastening,
On the inner peripheral surface of the upper housing (10), an annular opening/closing protrusion (12) having a flow port (13) that is opened and closed according to the close contact or separation of the check member (40) is formed to protrude, a check valve. 3. The method of claim 2,
The check member 40 includes a hemispherical head portion 41 and an insert portion 42 extending downward from the bottom of the head portion 41 by a predetermined length and inserted into the elastic member 30, and the It is formed to protrude stepwise on the upper end of the insert portion 42 and includes a coupling step portion 43 that is closely coupled to the upper surface of the elastic member 30,
The flow port 13 of the opening/closing protrusion 12 is provided with a streamlined inclined portion 13a corresponding to the outer shape of the head portion 41 to enable insertion and close contact of the head portion 41, the check valve. The method of claim 1,
The elastic member 30 has an annular seat body 31 having a male screw part 32 for mounting on the side thereof, and a spring integrally formed with the seat body 31 so as to extend spirally upward from the seat body 31 . comprising a sieve (33);
On the inner circumferential surface of the lower housing 20, a female screw portion 22 for mounting fastened to the male screw portion 32 for mounting is formed, and the seat body 31 is formed on the lower side of the female screw portion 22 for mounting. A check valve in which an annular support protrusion 23 to be seated and supported is formed to protrude A component processing and molding step (S110) of forming the upper housing 10, the lower housing 20, the elastic member 30, and the check member 40 constituting the check valve through machining;
a check member coupling step (S120) of coupling the check member 40 to the upper portion of the molded elastic member 30;
an elastic member mounting step (S130) of inserting and screwing the elastic member 30 to which the check member 40 is coupled into the lower housing 20;
A check valve manufacturing method comprising a; a housing coupling step (S140) of screwing the upper housing 10 to the lower housing 20 on which the elastic member 30 is mounted. 6. The method of claim 5,
In the part processing and molding step (S110), the elastic member 30 is an annular seat body 31 mounted to the lower housing 20 through screw fastening, and a helical spring for elastically supporting the check member 40 . The sieve 33 is integrally formed through machining to form a check valve manufacturing method.

Images