KR20120103978A - Check valve - Google Patents

Abstract

PURPOSE: A check valve is provided to improve the operational performance of a spring by fundamentally blocking the contact of movable fluid. CONSTITUTION: A check valve comprises a middle housing(300), an upper housing(100), a switching part(200), a lower housing(500), and a spring(400). A space part is formed inside the middle housing. The upper housing is coupled in the upper part of the middle housing so that fluid can flow in from the upper part thereof. The switching part is located at the bottom of the upper housing to open and close a passage of the fluid while vertically moving. The top exterior surface of the lower housing is thread-coupled to the lower inner circumference of the middle housing. An outlet hole through which the fluid passing through the switching part is discharged is formed inside of the lower housing. The spring elastically supports the switching part under at the bottom and guides the movement of the switching part. [Reference numerals] (AA) During operation

Description

Check Valve {CHECK VALVE}

The present invention relates to a check valve, and more particularly, a spring elastically supporting the open / close valve is positioned in a space between the open / close valve body outer wall and the upper rib of the lower housing so that the spring is not exposed to the outside and flows through the valve. The present invention relates to a check valve which prevents contact with a fluid and forms an upper end portion of an upper rib in an inclined surface so that the flow of fluid is natural, thereby improving the operation of the spring and the reliability and durability of the valve.

In general, the check valve is a valve that can be opened and closed according to the fluid flow state of the piping system, it is configured to allow the flow of fluid only in one direction.

1 is a cross-sectional view showing an example of a conventional check valve.

A plurality of water outlets 1a are formed at the lower side of the opening and closing side 3, and a locking jaw 7 is provided at the center thereof, thereby opening and closing the spring 6 by being coupled between the opening and closing edge 3 and the locking jaw 7. The side 3 is elastically supported. In addition, the lower end of the main body 1 and the pipe 8 are connected by screwing.

In the above-described configuration, when the fluid entering the inlet 2a presses the ball 4 of the open / close side 3, the spring 6 is compressed and the open / close side 3 descends, and the inflowed fluid is obtained. It is introduced through the gap formed between the ball (2a) and the ball (4) is passed through the through hole and discharged to the water outlet (1a). On the contrary, if the fluid does not flow in the inlet 2a, the spring 6 pushes the opening and closing side 3 upward, and the fluid does not flow back into the inlet 2a.

However, in the valve valve structure as described above, since the spring 6 is coupled to the lower part of the open / close side 3, a space for installing the open / close side 3 and the height of the spring 6 is required. This increases the size of H, which hinders the miniaturization of the check valve.

In addition, since the spring 6 supports the opening and closing edge 3 in the state of being caught by the locking jaw 7, a structure such as the locking jaw 7 is required at the bottom of the main body, which causes a complicated structure.

In order to solve this problem, another conventional check valve is shown in FIG.

In the conventional check valve shown, the disk 34 seals the outflow hole 14 because the spring 40 pushes the open / close side 30 upward. At this time, since the sealing member 50 maintains the airtightness of the fluid, the fluid waiting in the second housing 20 does not flow back to the first housing 10.

When pressure is applied to the disk 34 due to the fluid flowing into the inlet 12 of the first housing 10, the opening / closing edge 30 moves downward, and thus, the sealing member 50 and the disk 34. A gap is formed therebetween so that fluid flows in and flows into the second housing 20 through a plurality of discharge holes 34a formed in the body.

In the conventional check valve structure described above, the spring 40 is disposed inside the bottom of the open / close valve 30 so that the space occupied by the spring 40 is not required, and thus the length of the second housing 20 is relatively long. There is an advantage that can be reduced in size.

However, in the conventional check valve structures exemplified above, the spring is positioned at the bottom of the open / close side, and the spring is in contact with the fluid flowing in the process of opening and closing the open / close side. This causes the spring to deform when the flow velocity of the fluid is high or when the vortex occurs in the flow of the fluid, and when the foreign matter contained in the fluid is caught in the spring, the spring does not operate smoothly. In addition, when a hard foreign matter such as stones collide with the spring, the spring is damaged, such as the stamping occurs, causing the operation of the spring.

Furthermore, in view of these problems, a structure has been proposed in which the spring is positioned outside the member on which the spring is mounted to avoid contact with the flowing fluid. However, in this case, the diameter of the spring is increased so that the spring has an unstable element in operation. The problem arises that the length of the valve becomes long.

In view of the above-mentioned problems, the present invention provides a spring for elastically supporting the opening and closing edge in a space between the opening and closing body outer wall and the upper rib of the lower housing to prevent the spring from being exposed to the outside and at the same time the length of the spring. It is an object of the present invention to provide a check valve that can improve the stable operation of the spring, the operation reliability of the valve, and the durability by shortening the pressure reduction.

In addition, the present invention by inclining the upper surface of the upper rib of the lower housing to ensure a natural flow of the fluid flowing inside the valve check valve that can reduce the noise generation and pressure loss due to the vortex in the valve together It aims to provide.

The check valve of the present invention for achieving the above object is, the intermediate housing having a predetermined size space portion therein, the upper housing coupled to the upper side of the intermediate housing and the inflow of fluid from the upper side, and the upper housing The upper and outer peripheral surfaces are screwed to the opening and closing sides for opening and closing the fluid flow path by moving up and down in the bottom, and the lower inner peripheral surface of the intermediate housing, and the predetermined thickness of the outer peripheral surface of the predetermined length of the upper side is removed, and the lower surface thereof is a spring. It is formed as a support jaw, the inner side is formed of the upper rib, the lower housing is formed with an outlet hole through which the fluid passing through the opening and closing the inside, and the bottom is seated on the spring support jaw of the lower housing and the opening and closing edge at the bottom It is characterized in that it is made of a configuration including a spring that is elastically supported and induces movement of the opening and closing sides It shall be.

The opening and closing side of the present invention is the disk located in the middle of the upper side, the fluid passage is formed between the outer surface of the disk, the cylindrical opening and closing body outer wall extending a predetermined length from the upper side to the lower portion, and the fluid passage And a disk connector for connecting the disk to the opening and closing body outer wall.

It is preferable to form a concave groove in which the upper end of the spring is seated on the bottom surface of the upper bent portion of the outer wall of the opening and closing body of the present invention.

In addition, the concave groove is preferably such that one side of the inner portion protrudes a predetermined length downward to surround the inserted spring.

The upper rib of the lower housing is preferably formed such that the upper surface is formed as an inclined surface so that the flow of fluid flowing from the upper side is natural so that an abnormal phenomenon such as vortex does not occur.

In addition, the opening and closing edge body outer wall of the opening and closing side of the present invention so that the upper end of the upper rib of the lower housing in contact with the bottom of the bent portion of the opening and closing at the same time when the length extending to the lower side of the opening and closing edge It is preferable to form in the length to say.

According to the check valve of the present invention, since the spring for supporting the opening and closing sides at the bottom is located in the space between the opening and closing body body outer wall and the upper rib of the lower housing to be protected from the external environment, the spring can be operated stably, The contact with the fluid is essentially blocked, thereby exerting an effect of greatly improving the operation performance of the spring.

In addition, the length of the spring can be shortened by adjusting the height of the spring support jaw of the lower housing or by adjusting the size of the spring insertion space, thereby increasing the space freedom according to the spring installation.

In addition, the upper surface of the upper rib of the lower housing is inclined so that the flow of fluid through the valve outlet is natural, thereby reducing the noise generated by the vortex in the valve.

Furthermore, since the spring is not exposed to the outside during the operation of the check valve, the deformation of the spring is prevented, and the operation of the spring is not caused by foreign matter being caught in the fluid. As a result, the quality and durability of the valve can be improved.

1 and 2 are cross-sectional views showing an example of a conventional check valve structure,
3 is an exploded perspective view of a check valve according to the present invention;
4a to 4d is a view showing the structure of the opening and closing side of the check valve according to the present invention,
Figure 5 is a cross-sectional view before the operation of the check valve according to the invention,
6 is a cross-sectional view of the operating state of the check valve according to the present invention;
7 is a cross-sectional view showing an example of a flange type check valve structure according to the present invention.

Hereinafter, embodiments of the check valve of the present invention will be described in detail with reference to the accompanying drawings.

Figure 3 is an exploded perspective view of the check valve according to the present invention, Figures 4a to 4d is a view showing the structure of the opening and closing side of the check valve according to the present invention.

In addition, Figure 5 is a cross-sectional view showing a coupling structure of the check valve according to the present invention, Figure 5 is a state before operation, Figure 6 is a state in operation.

Referring to the drawings together, the check valve according to the present invention has a space portion of a predetermined size therein, the intermediate portion housing 300 formed in a cylindrical shape, the inflow of the fluid is made and the upper side of the intermediate housing 300 Coupled to the upper housing 100 and the opening and closing side 200 is located at the bottom of the upper housing 100 that is inserted into the inner side of the middle housing 300, and coupled to the bottom of the middle housing 300 The lower housing 500 and the bottom is seated on the upper side of the lower housing 500 is largely composed of a spring 400 for elastically supporting the opening and closing side 200 at the bottom.

That is, the check valve of the present invention includes a middle housing 300, the upper housing 100, the opening and closing valve 200 which is located at the bottom of the upper housing 100 to open and close the flow path of the fluid by the vertical movement. However, in particular, the lower housing 500 is the upper outer peripheral surface is screwed to the lower inner peripheral surface of the middle housing 300, the predetermined thickness of the outer peripheral surface of a predetermined length of the upper side is removed, the lower surface is formed as a spring support jaw 510 The upper rib 520 of the inner side connected to the spring support jaw 510 is represented as a shape that protrudes a predetermined length upward from the spring support jaw 510.

In the above-described configuration of the present invention, the upper housing 100 has a fluid passage consisting of an inlet hole into which fluid is introduced into the upper side and an outlet hole 116 into which the fluid is discharged to the lower side, and an inner circumferential surface of the inlet hole and the outlet Threads 111 and 117 are formed on the outer circumferential surface of the ball 116, respectively, so that the inlet hole is connected to the outer pipe, and the outer circumferential surface of the outlet hole 116 is coupled to the middle housing 300.

On the other hand, the O-ring 130 may be inserted on the outer surface of the lower end of the upper housing 100 to increase the buffering and sealing effect.

The intermediate housing 300 of the present invention is formed in a hollow tube shape with an empty inside, a thread is formed over a predetermined length of the inner peripheral surface of the upper side and the lower inner peripheral surface to form the spiral portion (310,320), the spiral portion (310,320) ) Is coupled to the upper housing 100 and the lower housing 500, respectively.

At this time, the upper and lower ends of the intermediate housing 300 are supported by the protruding jaws 113 and 530 formed on the outer surfaces of the upper housing 100 and the lower housing 500.

Opening and closing side 200 of the present invention is formed of the disk 210 and the opening and closing body outer wall 230 located on the outer side of the disk 210, the circular disk 210 and the opening and closing body A fluid passage 211 having a predetermined width is formed between the outer walls 230.

The opening and closing body outer wall 230 extends a predetermined length from the upper side of the opening and closing 200 to the bottom, the disk connector 240 is the cylindrical disk 210 located in the center of the opening and closing 200 and the opening and closing of the outside The side body outer wall 230 is connected to each other.

Meanwhile, as shown in FIG. 6, the opening / closing body outer wall 230 needs to be set to an appropriate length extending downward. That is, the upper rib 520 of the lower housing 500 should be determined in consideration of the length projecting upward. For example, the bottom surface 231 of the opening / closing body outer wall 230 extending downward when the opening / closing edge 200 moves downward by an externally applied hydraulic pressure is above the upper rib 520 of the lower housing 500. It is preferable that the time at which the stage contacts the upper bottom surface of the opening / closing edge 200 is made the same. At this time, the bottom surface 231 of the opening and closing body outer wall 230 is first seated on the spring support jaw 510, and the upper end of the upper rib 520 of the lower housing 500 is the upper bottom of the opening and closing valve 200. You can also make contact later on the face.

5 and 6, a predetermined gap is formed between the inner side surface of the opening / closing body outer wall 230 and the outer side surface of the upper rib 520 of the lower housing 500. The spring 400 is inserted into the space formed by the. Therefore, in the position in which the opening / closing side 200 is moved downward (see FIG. 6), the spring 400 is surrounded by the opening / closing body outer wall 230 and the upper rib 520 of the lower housing and is not exposed to the outside. do.

In this case, the length of the spring 400 may be adjusted by adjusting the size of the space surrounding the spring 400, and the spring 400 may be formed in the space formed by the outer wall of the opening and closing body and the upper rib of the lower housing. Since it is enclosed, a stable operation is achieved. Due to this characteristic, the length of the spring 400 can be made shorter than the existing spring length. The length of the spring 400 is a very important factor in the check valve, the more stable operation is performed when the length of the spring 400 is formed as short as possible.

As an example of adjusting the length of the spring 400, in the upper structure of the lower housing 500, when the height of the spring support jaw 510 is increased, the length of the spring 400 may be reduced.

In addition, as another structure of the opening and closing side 200 of the present invention, as shown in Figure 4d, the recessed groove 213 of the opening and closing side has a shape in which one side of the inner side protrudes a predetermined length downward (215 is a protrusion) In this case, the spring 400 is a structure that is blocked from the inner space through which the fluid flows.

In the structure of the opening and closing side 200 of the present invention, the opening and closing body outer wall 230 has a length extending to the lower portion of the upper rib 520 of the lower housing 500 when the opening and closing edge 200 is lowered The upper end of the to be formed to the length to be in contact with or at the same time on the bottom surface of the bent portion of the opening and closing 200.

 As described above, the lower housing 500 of the present invention, the upper outer peripheral surface is screwed to the lower inner peripheral surface of the intermediate housing 300. In particular, the upper portion of the lower housing 500 is a predetermined thickness of the outer peripheral surface of a predetermined length of the upper portion is removed, the lower surface of the removed portion is the spring support jaw 510, the inner side of the spring support jaw 510 The upper rib 520 forms a structure that protrudes a predetermined length upward from the spring support jaw 510.

In particular, the upper rib 520 of the lower housing 500 forms an upper end portion as the upper inclined surface 521 so that the flow of fluid flowing from the upper side into the inlet of the lower housing 500 is natural. . The formation of the upper inclined surface 521 prevents the flow of the fluid into the vortex or the occurrence of noise due to the intermittent flow.

On the other hand, Figure 7 is a view illustrating a flange type check valve structure.

In the illustrated flange type check valve, the structure of the open / close valve 200 is the same as that of the check valve described above, but the structure of the lower housing 700 located at the bottom of the open / close valve 200 is the lower housing described above. Different from 500. That is, the upper structure of the lower housing 700 is the same as the structure of the lower housing 500 described above, but the bottom structure is changed. That is, as shown in Figure 7, the bottom surface is formed in a plane.

The operation of the check valve of the present invention configured as described above will be described below.

Figure 5 shows a state before the operation of the check valve of the present invention, Figure 6 is a cross-sectional view showing a state in the course of the operation of the check valve.

As shown, when a fluid is introduced through the upper housing inlet of the check valve and a predetermined pressure is applied, the opening / closing side 200 supported by the spring 400 moves downward, and thus the upper housing 100 The outlet 116 is opened to move to the lower housing 500 through the fluid passage 211 of the open / close side 200.

At this time, as shown in Figure 6, at the moment of the movement of the fluid opening and closing side 200 is moved downward along the inner circumferential surface inside the intermediate housing 300, the bottom of the body outer wall bottom 211 of the opening and closing side 200 ) Is almost in contact with the spring support jaw 510 of the lower housing 500. At this moment, the upper end of the lower housing upper rib 520 comes into contact with the bottom surface of the upper side of the open / close side at about the same time. In this case, the lower housing body outer wall bottom 211 may first reach the spring support jaw 510 of the lower housing.

As shown in FIG. 6, in the state in which the opening / closing side 200 is moved downward, the spring 400 is formed in a space formed by coupling the body outer wall 230 of the opening / closing side with the lower housing upper rib 520. It is seated, and in this state, the spring 400 is completely blocked from the outside. Due to this structure, the fluid does not come into contact with the spring 400 in the process of passing the fluid through the fluid passage 211 of the opening and closing valve 200 to the discharge hole of the lower housing 500.

Therefore, the check valve of the present invention does not have any influence on the operation of the spring 400 according to the flow of the fluid, so that the deformation of the spring 400 does not occur and does not cause an abnormality in the operation of the spring 400. Have

Along with this, the upper end of the spring 400 installed at the bottom of the opening / closing side 200 of the present invention is stably inserted into the concave groove (213 of FIGS. 4C and 4D) formed on the upper bottom surface of the opening / closing side 200. It is also coupled through the stable coupling structure of the spring 400 has the advantage that the deformation or departure of the spring 400 does not occur.

As described above, the check valve according to the present invention has a spring that elastically supports the open / close side so that the contact with the fluid is hardly made, and thus the operation of the check valve in the conventional check valve due to deformation of the spring, pinch or collision of foreign matter, etc. It is possible to solve the problem causing the problem, thereby improving the quality and durability of the check valve.

It is apparent to those skilled in the art that the present invention is not limited to the above-described embodiments, and that various modifications and changes can be made without departing from the spirit and scope of the present invention. Such modifications or variations will also belong to the claims of the present invention.

100: upper housing 111,117: spiral portion
113: protruding jaw 115: nut part
116: outflow hole 120: sealing member
130: O-ring
200: opening and closing side 210: disk
211: fluid passage 213: concave groove
215: bottom projection jaw 230: outer wall of the opening and closing body
231: opening and closing the body outer wall bottom 240: disk connector
300: middle housing 310,320: spiral
400: spring
500: lower housing 510: spring support jaw
520: upper rib 521: inclined surface of the upper rib end
530: protruding jaw 540: nut part
600: housing body 610: inlet
700: lower housing 710: lower housing inclined surface
720: spring support surface 1000: check valve

Claims (6)

An intermediate housing 300 having a predetermined size space therein;
An upper housing 100 coupled to an upper side of the intermediate housing 300 and receiving fluid from an upper side thereof;
An opening and closing valve 200 positioned at a bottom of the upper housing 100 to open and close a flow path of a fluid by vertical movement;
The upper outer circumferential surface is screwed to the lower inner circumferential surface of the middle housing 300, the predetermined thickness of the outer circumferential surface of a predetermined length of the upper portion is removed, the lower surface is formed of the spring support jaw 510, the inner side of the upper rib 520 A lower housing 500 formed with an outlet hole through which the fluid passing through the opening / closing side 200 exits,
A check valve including a spring 400 seated on the spring support jaw 510 of the lower housing 500 to elastically support the open / close side 200 at the bottom and induce the movement of the open / close side 200. . The method according to claim 1,
The opening and closing side 200 has a fluid passage 211 is formed between the disk 210 located in the middle of the upper side and the outer surface of the disk 210, the cylindrical opening and closing extending a predetermined length from the upper side to the lower side And a disc connector (240) connecting the disc body (210) and the disc body (210) to the open / close valve body (230) across the fluid passage (211). The method according to claim 2,
A check valve having a concave groove 213 is formed on the bottom of the upper bent portion of the opening and closing body outer wall 230, the top of the spring is seated. The method according to claim 3,
The concave groove 213 is a check valve formed of a structure in which one side of the inner portion protrudes a predetermined length downward to surround the inserted spring. The method according to claim 1,
The upper rib 520 of the lower housing is a check valve formed in the inclined surface so that the flow of the fluid flowing from the upper side of the upper side is natural. The method according to claim 1,
Opening and closing body outer wall 230 of the opening and closing side 200 has a length extending downward to the upper end of the upper rib 520 of the lower housing when the opening and closing edge 200 is lowered the opening and closing edge 200 Check valve formed to the length of the contact or the early contact on the bottom surface of the bent portion of the.

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