KR20170035590A

KR20170035590A - Valve for preventing turbulence

Info

Publication number: KR20170035590A
Application number: KR1020150134651A
Authority: KR
Inventors: 이상선
Original assignee: (주)플로닉스
Priority date: 2015-09-23
Filing date: 2015-09-23
Publication date: 2017-03-31

Abstract

A vortex-proof valve is disclosed. The valve includes a body made of plastic; A core formed inside the body; And an opening / closing portion located on the main body, wherein a fluid transfer hole is formed in an inner space of the core, the fluid transfer hole communicating with a portion of the inner surface of the core through the hole of the main body when the valve is closed A protrusion is formed at an end of the core corresponding to an input or output end of the fluid transfer hole and the protrusion is received in a receiving portion formed in the pipe.

Description

Valve for preventing turbulence}

The present invention relates to a vortex-proof valve.

A valve is a means for opening and closing the flow of a fluid, which uses a diaphragm or ball to control the flow of the fluid.

1 is a view showing the structure of a general valve.

Referring to Figure 1, the valve includes a body 100, a diaphragm 102, and an operating portion 104 for controlling the diaphragm 102.

A fluid transfer hole 106 is formed in the main body 100 and the fluid input to the input end 110 of the fluid transfer hole 106 is discharged through the output end 112.

The portion of the upper side inner side surface 100a adjacent to the diaphragm 102 has a rectangular cross section and the portion of the lower side inner side surface 100b which is in contact with the diaphragm 102 100c have an angular shape.

A vortex can be generated at the A portion of the fluid delivery hole 106 due to the body portion of the square cross-section and the main body portion 100c of the angled shape. This obstructs fluid flow due to the body portion of the square cross-section and the angular body portion 100c, which hydrodynamically causes a change in fluid energy or fluid velocity, which causes eddy currents.

Such a vortex may damage the main body 100 and the diaphragm 102, and as a result, the lifetime of the valve is shortened.

Korean Patent Registration No. 1019364 (registered on February 24, 2011)

The present invention is intended to provide a valve that prevents vortex generation.

According to an aspect of the present invention, there is provided a valve for preventing vortex generation.

According to the first embodiment, there is provided a valve comprising: a body made of plastic; A core formed inside the body; And an opening / closing part located on the main body, wherein a fluid transfer hole is formed in an inner space of the core to allow fluid to move, and the opening / closing part contacts one end of the core through the hole of the main body when the valve is closed, And a protrusion is formed at an end of the core corresponding to an input or output end of the fluid transfer hole and the protrusion is received in a receiving portion formed in the pipe.

A protrusion may be formed at an end of the core corresponding to one of an input end and an output end of the fluid delivery hole and a receiving portion may be formed at an end of the core corresponding to the other end.

The opening / closing portion is a diaphragm, and a corner portion of the core portion contacting the diaphragm may have a curved shape.

The body portion corresponding to the inner surface of the core having the curved shape may have a curved shape.

Wherein at least a part of the core portion which is in contact with the hole of the main body or in contact with the opening of the main body at the inner side of the core corresponding to the fluid transfer hole is curved Shape.

The opening and closing part is in contact with a part of the lower inner side surface, and the upper inner side parts and the lower inner side parts of the core adjacent to the opening and closing part may have a curved shape.

The body portions corresponding to the inner surfaces of the core having the curved shape may have a curved shape.

The shape of the fluid delivery hole may be determined so that the fluid energy at the input end of the fluid delivery hole, the fluid energy at the fluid delivery hole portion corresponding to the opening and closing portion, and the fluid energy at the output end of the fluid delivery hole are equal.

The inner surface of the core having the curved shape corresponds to a part of the imaginary circle.

The major axis radius of a virtual ellipse formed by the curved line of the core portion contacting the opening / closing portion may be smaller than twice the minor axis radius of the ellipse.

The speed of the fluid may be the same throughout the portion corresponding to the opening and closing part in the fluid transfer hole so that a vortex is not generated in the fluid transfer hole.

At least two of the fluid energy at the input end of the fluid delivery hole, the fluid energy at the fluid delivery hole portion corresponding to the opening and closing portion, and the fluid energy at the output end of the fluid delivery hole when the opening / closing portion opens the flow of the fluid, The shape of the fluid delivery hole can be determined so that the fluid energy is the same.

The main body may be made of engineering plastic, the core may be made of a fluororesin, and the engineering plastic may be a polyphenylene ether resin composition comprising a polyphenylene ether resin and a polystyrene resin.

According to a second embodiment, there is provided a valve comprising: a body made of plastic; A core formed inside the body; And an opening / closing part located on the main body, wherein a fluid transfer hole through which fluid moves is formed inside the core, the opening / closing part contacts one end of the core through a hole of the main body to block the movement of the fluid, Wherein a receiving portion is formed at an end of the core corresponding to an input end or an output end of the fluid transfer hole, and a projection of the pipe is received in the receiving portion.

The fluid transfer hole may have a convex shape, not a straight shape, and a portion adjacent to the opening / closing portion on the inner side of the core corresponding to the fluid transfer hole may have a curved shape.

Wherein the fluid introduced through the input end of the fluid transfer hole is output through the output end of the fluid transfer hole and a specific cross section of the fluid transfer hole is formed so that vortex is not generated in the fluid transfer hole until the input fluid is output. The velocity of the fluid flowing up and down may be the same.

By providing the anti-vortexable valve according to one embodiment of the present invention, the valve may not generate a vortex in the fluid transfer hole because the obstacle obstructing the flow of the fluid is not present in the fluid transfer hole.

Particularly, since fluid energy as a whole is substantially equal in the fluid transfer hole, there is an advantage that the generation of vortex can be further suppressed.

BRIEF DESCRIPTION OF THE DRAWINGS Fig.
2 is a perspective view showing a valve according to the first embodiment;
3 is a cross-sectional view schematically showing a valve according to a first embodiment;
4 is a perspective view schematically showing a structure of a core and a main body according to the first embodiment;
5 is a schematic view of a valve according to a second embodiment;
6 is a schematic view of a valve according to a third embodiment;
Figs. 7 and 8 schematically show a valve according to a fourth embodiment; Fig.
9 to 11 are views showing various structures of a diaphragm as an opening and closing part of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The present invention is capable of various modifications and various embodiments, and specific embodiments are illustrated in the drawings and described in detail in the detailed description. It is to be understood, however, that the invention is not to be limited to the specific embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. In addition, numerals (e.g., first, second, etc.) used in the description of the present invention are merely an identifier for distinguishing one component from another.

Also, in this specification, when an element is referred to as being "connected" or "connected" with another element, the element may be directly connected or directly connected to the other element, It should be understood that, unless an opposite description is present, it may be connected or connected via another element in the middle.

The present invention relates to a valve capable of preventing vortex flow, and has a main feature that a vortex (swirl) is not generated in the fluid transfer hole.

Here, the valve means a valve whose main body is made of plastic.

When a fluid moves in a fluid transfer hole, a vortex may occur due to energy transfer, speed, etc. In particular, when there is an obstacle obstructing fluid flow in a fluid transfer hole, .

Such vortices affect the body and the core, thereby shortening the life of the body and the core. Accordingly, the present invention relates to a valve having a structure capable of preventing occurrence of vortex by smoothly flowing fluid by removing such an obstacle.

In addition, the present invention is characterized in that a protrusion is formed at an end of a core corresponding to one of an input end and an output end of the fluid delivery hole. Such a protrusion can be received in the receiving portion formed in the pipe. Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

Fig. 2 is a perspective view showing a valve according to the first embodiment, Fig. 3 is a cross-sectional view schematically showing a valve according to the first embodiment, Fig. 4 is a perspective view schematically showing the structure of the core and the main body according to the first embodiment FIG.

2 and 3, the valve according to the first embodiment includes a main body 200, a core 202, an operating portion 204, and an opening / closing portion 300. In an embodiment of the present invention, the valve may be a valve body made of plastic but may be made of steel other than plastic.

The main body 200 is made of plastic, and may be made of Engineering Plastics, for example.

Conventionally, the main body of the valve is made of vinyl chloride resin (PVC) or the like, but since the thermal deformation temperature of PVC is about 70 캜, the valve can not be used at temperatures higher than 60 캜.

However, when the main body 200 is formed of engineering plastic, there is an advantage that the valve can be used at a high temperature of 60 占 폚 or higher, particularly around 100 占 폚.

According to the first embodiment, the main body 200 is an engineering plastic, and can be made of a polyphenylene ether resin composition containing a polyphenylene ether resin and a polystyrene resin as a component.

Of course, the body 200 may be made of engineering plastics such as POLYIMDE, POLYSULFONE, POLY PHENYLENE SULFIDE, POLYAMIDE IMIDE, POLYACRYLATE, POLYETHER SULFONE, POLYETHER ETHER KETONE, POLYETHER IMIDE, LIQUID CRYSTAL POLYESTER, POLYETHER KETONE, .

A plurality of holes 220 may be formed in the side end of the main body 200. Although not shown in FIG. 2, the coupling means may connect the valves and the pipes through the plurality of holes 220.

The core 202 is formed inside the main body 200. A hole (hereinafter referred to as a fluid transfer hole) 210 for fluid movement is formed on the inner surface of the core 202.

According to the first embodiment, the core 202 may be made of a fluororesin. The fluororesin generally refers to a resin containing fluorine in the molecule. Examples of the fluororesin include polytetrafluoroethylene (PTFE), polychlorotrifluoroethylene (PCTFE) and the like, and tetrafluoroethylene perfluoroalkyl vinyl ether copolymer (Tetra fluoro ethylene perfluoro alkyl vinyl ether coppolymer, PFA). These fluororesins are excellent in heat resistance, chemical resistance, electrical insulation, friction coefficient, and adhesion and adhesiveness. That is, when the core 202 is formed of the fluorocarbon resin, since the coefficient of friction of the core 202 is small, the flow rate change due to the laminar flow in the fluid delivery hole 210 can be minimized. That is, the difference between the flow rate at the upper or lower side of the fluid delivery hole and the flow rate at the center can be minimized based on a specific point.

The protrusion 310 may be formed at an end of the core 202 corresponding to one of the input end and the output end of the fluid delivery hole. The receiving portion 320 may be formed at the end of the core 202 corresponding to the other end of the input and output ends of the fluid transfer hole.

Accordingly, the protrusion 310 can be received in the receiving portion 320 formed in the pipe.

Thus, by forming the projecting portion in the fluid transfer hole and forming the receiving portion in the pipe, there is an advantage that the valve and the pipe can be connected without a separate fastening means.

7, protrusions 310 may be formed at ends of the cores 202 corresponding to the input and output ends of the fluid delivery holes, respectively. These protrusions 310 may be received in the receiving portion 320 formed in the pipe.

For example, referring to FIG. 8, a receiving portion 320 may be formed at an end of a core 202 corresponding to an input end and an output end of a fluid delivery hole, respectively. The receiving portion 320 may be received in the protrusion 310 formed in the pipe.

The opening and closing part 300 may be positioned on the main body 200 or the core 202 as a means for allowing or closing fluid movement in the fluid transfer hole 210. When the fluid is allowed to flow to the fluid transfer hole 210, the opening and closing part 300 has the structure of FIG. 3. When closing the fluid flow in the fluid transfer hole 210, the opening and closing part 300 300 may contact a portion 210c of the lower inner side surface 222 of the core 202. [

For example, the opening and closing part 300 may be a diaphragm or a bowl. In the drawings, the diaphragm is used as the opening and closing part 300, but it is not limited to the diaphragm.

The operation unit 204 is a means for controlling the opening and closing operation of the opening and closing unit 300. For example, the operating unit 204 can control the opening and closing unit 300 so as not to contact or contact the lower inner side surface 222 of the core 202. [

The connection portion 302 connected to the upper portion of the opening and closing portion 300 may be coupled to the operating portion 204 and the opening and closing portion 300 may be raised or lowered under the control of the operating portion 204. [ The implementation of such an operation unit 204 can be variously modified, and many structures have been proposed in the past, and the existing structure can be adopted as it is.

Hereinafter, the structure of the valve that does not generate a vortex will be described in detail.

3 and 4, the core 202 is formed on the inside of the main body 200, and includes an upper inner side surface 220 and a lower inner side surface 222, and a portion of the opening / A hole 400 which can be moved up and down can be formed.

The fluid transfer hole 210 corresponding to the inner surface of the core 202 includes an input end 210a and an output end 210b and the fluid input to the input end 210a is transferred to the output end 210b.

According to one embodiment, a curved portion is formed in at least a part of the upper inner side surface 220 and the lower inner side surface 222 of the core 202, and an obstacle obstructing the flow of the fluid Etc.) do not exist.

The portions 220a and 220b adjacent to the hole 400 of the upper inner side surface 220 of the opening and closing part 300 may have a curved shape as shown in Fig. 3, The portions 222a and 222b corresponding to the curved portions of the upper inner side surface 220 and the portion 210c contacting the opening and closing portion 300 may have a curved shape.

Here, the curved portions 220a, 220b, 222a, and 222b may be formed by sloping toward the opening and closing part 300. When the upper inner side surface 220 and the lower inner side surface 222 of the core 202 are formed as described above, there is no obstacle obstructing the flow of the fluid in the fluid transfer hole 210. As a result, a vortex may not be generated in the fluid transfer hole 210.

The portions 200a, 220c, 200b, and 200c of the body 200, corresponding to the curved portions 220a and 220b of the upper inner side surface 220 and the curved portions 222a and 222b of the lower inner side surface 222, 200d may also have a curved shape. Here, the radius of curvature of corresponding curved portions may be the same or similar. That is, unlike the prior art, in the valve of the present invention, the inner surfaces 220 and 222 of the core 202 and corresponding body portions may have a curved shape.

From the energy point of view, the shape of the inner surfaces 220 and 222 of the core 202 can be designed so that the Bernoulli's theorem is applied from the input 210a to the output 210b of the fluid transfer hole 210 have. In detail, according to Bernoulli's theorem, the fluid energy (the sum of the kinetic energy and the kinetic energy) is constant anywhere in the fluid delivery hole 210 without loss. Conversely, if a loss occurs, fluid energy can vary from location to location. Thus, the valve of the present invention can be used to design the inner sides 220 and 222 of the core 202 so that Bernoulli's theorem applies, i.e., the fluid energy is equal at any location of the fluid delivery hole 210, The transfer hole 210 can be formed. For example, the fluid energy E1 at the input end 210a of the fluid delivery hole 210, the fluid energy E2 at the portion corresponding to the opening and closing part 300, and the fluid energy E3 at the output end 210b, The fluid delivery hole 210 can be designed to be substantially the same.

In the prior art, Bernoulli's theorem is not applied to a fluid transfer hole due to a fluid energy loss due to an obstacle such as a square corner. In the valve of the present invention, however, the inner surface of the core 202 corresponding to the fluid transfer hole 210 The Bernoulli's theorem can be applied to the fluid transfer hole 210 since the fluid passages 220 and 222 have no fluid energy loss.

From the viewpoint of the fluid velocity, considering the cross section of the fluid transfer hole 210 with respect to a specific point of the fluid transfer hole 210, the fluid flows up and down at the corresponding point. At this time, if the velocities of the fluids flowing up and down are different, a vortex may occur if the velocity of the fluid flowing to the upper or lower part is different from the velocity of the fluid flowing to the center part. Therefore, the shape of the fluid delivery hole 210 can be determined so that the velocities of the fluid flowing up and down in the fluid delivery hole 210 are substantially equal to each other to prevent vortex generation.

However, in order to minimize the frictional force of the fluid flowing through the core 202, the flow rate of the fluid flowing toward the center portion may be different from that of the fluid flowing toward the upper portion or the lower portion due to the frictional force of the inner surfaces 220 and 222 of the core 202, Is formed of a fluororesin. Therefore, if the velocity of the fluid is totally the same at the specific point, for example, at the portion of the fluid delivery hole 210 corresponding to the opening / closing part 300, the velocity difference between the upper and lower fluids due to the core 202 can be neglected Vortex may not be generated.

According to another embodiment, the portion 210c of the lower inner side surface 222 that contacts the opening / closing portion 300 may have a curved shape at least partially. Particularly, both side edge portions of the lower inner side surface 222 of the portion 210c contacting the opening / closing portion 300 may have a curved shape. As a result, even if the fluid flows beyond the portion 210c of the lower inner side surface 222 that contacts the opening / closing portion 300, the portion 210c contacting the opening / closing portion 300 of the lower inner side surface 222, The flow is not interrupted. As a result, no eddy current may be generated in the fluid transfer hole 210, particularly around the hole 400.

In summary, the valve of the present invention may form the shape of the inner surfaces 220 and 222 of the core 202 to prevent eddy currents in the fluid delivery holes 210.

5 is a view schematically showing a valve according to a second embodiment of the present invention.

Referring to FIG. 5, a portion of the upper inner side surface 220 and the lower inner side surface 222 of the core 202 may have a curved shape.

The portions 220a and 220b adjacent to the hole 400 in the upper inner side surface 220 have a curved enhancement and the portions 220a and 220b each have a portion of the imaginary circles c1 and c5 Lt; / RTI >

In addition, portions 222a and 222b corresponding to portions 220a and 220b of lower inner side surface 222 may be part of virtual circles c2 and c6, respectively.

In addition, the portion 210c of the lower inner side surface 222 that contacts the opening / closing portion 300 may also be a part of the imaginary circle c4.

That is, the curved portions 220a, 220b, 222a, 222b and 210c of the inner sides 220 and 222 of the core 202 may be part of the virtual circles c1, c2, c4, c5 and c6, have. As a result, there is no obstacle obstructing the fluid flow in the fluid transfer hole 210, so that a vortex may not be generated in the fluid transfer hole 210.

Here, the curved portions 220a, 220b, 222a, 222b, and 210c are portions contacting the portions near the opening and closing part 300 or the opening and closing part 300. [ 5, the fluid transfer hole 210 may have a convex shape instead of a straight shape. In this case, any one of the convex portions 220a, 220b, 222a, 222b, and 210c may have a curved shape Vortices are more likely to occur if they have a non-rectangular shape.

Conventional valve designers have never known whether a vortex is generated, so that convex portions are formed at right angles to facilitate mold manufacturing. However, due to such a right angle portion, that is, obstacles, vortices have to be generated in the fluid transfer hole, but they have not recognized such vortex generation.

Accordingly, the present invention has developed an optimum valve capable of recognizing such a vortex and preventing vortex, and separately embodied a mold for manufacturing such a valve. In particular, the radii of the imaginary circles (c1, c2, c4, c5 and c6) are designed to maximize the flow of the fluid.

When the portion 210c of the lower inner side surface 222 contacting the opening and closing part 300 and the ends of the hole 400 are connected to each other, the virtual circle c3 is formed. When the opening and closing part 300 is recessed do. As a result, the fluid transfer hole 210 can be formed entirely without angled portions.

6 is a view schematically showing a valve according to a third embodiment of the present invention.

6, the portion 210c of the lower side inner surface of the core 202 which contacts the opening / closing portion 300 may have an elliptical shape (e2), and the opening / The concave portion may have an ellipse (e1) shape when it comes in contact with the first electrode 210c.

According to one embodiment, the long axis radius of the ellipse e2 may be less than twice the short axis radius. When the long axis radius becomes twice or more the short axis radius, the portion 210c that contacts the opening / closing part 300 in the lower side inner surface may be an obstacle obstructing the flow of the fluid. Therefore, the vortex can be prevented by making the radius of the long axis of the ellipse e2 smaller than twice the radius of the short axis so that the portion 210c that contacts the opening / closing portion 300 is not an obstacle.

Further, the long axis radius of the ellipse e1 may be smaller than twice the short axis radius.

9 to 11 are views showing various structures of a diaphragm as an opening and closing part of the present invention.

As the opening and closing part 300, the diaphragm may have a single membrane structure as shown in FIG. 8, and may have a double membrane structure or a triple membrane structure as shown in FIGS. 10 and 11.

Referring to FIG. 9, the diaphragm of this embodiment may have a structure having a single membrane structure and a connection portion 302 formed at an upper end thereof.

Specifically, the mounting portion 906 protrudes from the bottom surface of the upper surface of the curved portion 902, and the connecting portion 302 can be coupled to the mounting portion 906. A flat portion 900 extending in the left and right directions from the mounting portion 906 may be formed and a fixing hole 900a used for coupling the diaphragm to the operation portion 204 may be formed on the flat portion 900 And may be formed at the end portion.

From a geometrical viewpoint, the diaphragm may have a gull shape as a whole, and the mounting portion 906 may have various shapes as well as a rectangular cross section as shown in FIG.

Referring to FIG. 10, the diaphragm of this embodiment may have a double-layer structure. Specifically, the diaphragm may include an upper film 1000 and a lower film 1002 which are vertically coupled.

A lower mounting portion 1026 may be formed at the center of the lower film 1002 and a connection portion 302 may be coupled to the center of the mounting portion 1026. Of course, the lower flat portion 1020 is formed in the longitudinal direction of the lower mounting portion 1026.

The upper film 1000 includes an upper mounting portion 1014 corresponding to the lower mounting portion 1026, and a hole 1014a is formed at the center thereof. Here, the connection portion 1002 coupled to the lower mounting portion 1026 passes through the hole 1014a of the upper mounting portion 1014 and is exposed to the outside. The lower surface of the upper film 1000 has a structure capable of receiving the lower mounting portion 1026 and an upper flat portion 1010 is formed in the longitudinal direction of the upper mounting portion 1014.

On the other hand, holes 1012a and 1020a corresponding to the fixing holes of the single membrane can be formed in the upper film 1000 and the lower film 1002, respectively.

The top film 1000 and the bottom film 1002 may have a generally similar structure when viewed formally.

Referring to Fig. 11, the diaphragm of this embodiment may have a triple-layer structure. Specifically, the diaphragm may include an upper film 1100, an intermediate film 1102, and a lower film 1104 that are sequentially coupled.

The lower film 1104 includes a lower mounting portion 1136 and a connecting portion 302 may be vertically coupled to the center of the lower mounting portion 1136. Further, the lower flat portion 1130 is formed in the longitudinal direction of the lower mounting portion 1136.

The intermediate film 1102 includes an intermediate mounting portion 1124 coupled to the lower mounting portion 1136 and the lower surface of the intermediate mounting portion 1124 has a structure capable of receiving the upper surface of the lower mounting portion 1136. At this time, a hole 1124a is formed at the center of the intermediate mounting portion 1124, and the connection portion 302 passes through the hole 1124a. Further, an intermediate flat portion 1122 is formed in the longitudinal direction of the intermediate mounting portion 1124.

The upper film 1100 includes an upper mounting portion 1114 coupled to the intermediate mounting portion 1124 and a lower surface of the upper mounting portion 1114 has a structure capable of receiving the upper surface of the intermediate mounting portion 1124. At this time, a hole 1114a is formed at the center of the upper mounting portion 1114, and a connection portion 302 passing through the intermediate mounting portion 1124 is exposed to the outside through the hole 1114a. Further, an upper flat portion 1112 is formed in the longitudinal direction of the upper mounting portion 1114.

On the other hand, holes 1110, 1010, and 1130 corresponding to the fixing holes of a single membrane may be formed in the upper film 1100, the intermediate film 1102, and the lower film 1104, respectively.

The upper film 1100, the intermediate film 1102, and the lower film 1104 may have a generally similar structure.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the following claims And changes may be made without departing from the spirit and scope of the invention.

200: main body 202: core
204: Operation part 210: Fluid transferring ball
210a: input terminal 210b: output terminal
220: upper inner side surface 222: lower inner side surface
300: opening and closing part 302:
310: protrusion 320:

Claims

In the valve,
A body made of plastic;
A core formed inside the body; And
And an opening / closing part located on the main body,
Wherein a fluid transfer hole through which the fluid moves is formed in the inner space of the core and the opening and closing part contacts the one end of the core through the hole of the main body when the valve is closed to block the movement of the fluid, Wherein a protrusion is formed at an end of the core corresponding to an output end, and the protrusion is received in a receiving portion formed in the pipe.

The valve according to claim 1, wherein a protrusion is formed at an end of the core corresponding to one of an input end and an output end of the fluid transfer hole, and a receiving portion is formed at an end of the core corresponding to the other end.

The valve according to claim 1, wherein the opening / closing portion is a diaphragm, and a corner portion of the core portion contacting the diaphragm has a curved shape.

4. The valve according to claim 3, wherein the body portion corresponding to the inner surface of the core having the curved shape has a curved shape.

2. The apparatus of claim 1, wherein the inner side surface of the core comprises an upper inner side surface and a lower inner side surface,
Wherein at least a part of the core adjacent to the hole in the main body or in contact with the opening and closing part at the inner surface of the core corresponding to the fluid transfer hole has a curved shape.

6. The valve according to claim 5, wherein the opening / closing portion is in contact with a part of the lower inner side surface, and the upper inner side portions and the lower inner side portions of the core adjacent to the opening / closing portion have a curved shape.

The valve according to claim 6, wherein the body portions corresponding to the inner surfaces of the core having the curved shape have a curved shape.

The apparatus of claim 1, wherein the shape of the fluid delivery hole is such that the fluid energy at the input end of the fluid delivery hole, the fluid energy at the fluid delivery hole corresponding to the opening and closing part, Is determined.

5. The valve according to claim 4, wherein the inner surface of the core having a curved shape corresponds to a portion of a virtual circle.

The valve according to claim 1, wherein a long axis radius of a virtual ellipse formed by a curved line of the core portion contacting the opening / closing portion is smaller than twice the short axis radius of the ellipse.

The valve according to claim 1, wherein a fluid velocity is the same throughout the portion corresponding to the opening and closing part in the fluid delivery hole so that a vortex is not generated in the fluid delivery hole.

[2] The apparatus according to claim 1, wherein when the opening / closing part opens the flow of fluid, fluid energy at an input end of the fluid delivery hole, fluid energy at a fluid delivery hole corresponding to the opening / Wherein the shape of the fluid delivery hole is determined such that at least two fluid energies of the fluid energy are equal.

The valve according to claim 1, wherein the main body is made of engineering plastic, and the core is made of a fluororesin.

14. The valve according to claim 13, wherein the engineering plastic is a polyphenylene ether resin composition comprising a polyphenylene ether resin and a polystyrene resin.

In the valve,
A body made of plastic;
A core formed inside the body; And
And an opening / closing part located on the main body,
A fluid transfer hole through which the fluid moves is formed inside the core and the opening and closing part contacts the one end of the core through the hole of the main body to block the movement of the fluid, Wherein a receiving portion is formed at an end of the core, and a protrusion of the pipe is received in the receiving portion.

16. The valve according to claim 15, wherein the fluid transfer hole has a convex shape, not a straight shape, and a portion adjacent to the opening / closing portion on the inner side of the core corresponding to the fluid transfer hole has a curved shape. .

16. The valve according to claim 15, wherein the corners of the core portion in contact with the opening and closing portions have a curved shape, and the upper portion of the core portion is flat.

16. The apparatus of claim 15, wherein the fluid introduced through the input end of the fluid delivery hole is output through the output end of the fluid delivery hole, and the fluid is delivered to the fluid delivery hole Wherein a velocity of the fluid flowing up and down at a specific cross section of the fluid transfer hole is the same.