WO2015119334A1

WO2015119334A1 - Airtight structure of ball valve

Info

Publication number: WO2015119334A1
Application number: PCT/KR2014/003869
Authority: WO
Inventors: 강석근; 강범구
Original assignee: 강석근; 강범구
Priority date: 2014-02-04
Filing date: 2014-04-30
Publication date: 2015-08-13
Also published as: KR101436292B1

Abstract

The present invention comprises: a body having a inclined surface formed therein; a connection body coupled to the body and having a holding protrusion formed on the inner diameter surface thereof; a ball member inserted into the body such that one side surface thereof comes into contact with the inclined surface, and opening/closing a fluid path by the operation of a handle; an elastic force application member of which one side surface comes into contact with the ball member, having a fitting groove formed at the other side thereof, and having one pair of groove parts formed on the outer diameter surface thereof; and an elastic member of which one side is supported by the holding protrusion and of which the other side is fitted into a fitting groove so as to apply elastic force to the elastic force application member, wherein the ball member and the inclined surface, and the elastic force application member, continuously come into close contact with each other by the elastic force of the elastic member.

Description

Ball valve hermetic structure

The present invention relates to a gas tight structure of a ball valve.

More specifically, the present invention relates to a ball valve hermetic structure capable of improving hermeticity by applying an elastic force to an elastic force applying member in contact with the ball member so as to be in close contact with the ball member.

The present invention also relates to a ball valve hermetic structure capable of minimizing wear of the elastic force applying member due to repeated rotation of the ball member.

In addition, a pair of O-rings are provided on the outer diameter surface of the elastic force applying member having a predetermined thickness, and the elastic member is inserted into the fitting groove formed on one side, so that the elastic force of the elastic member is uniformly transmitted to the elastic force applying member, thereby causing an eccentric phenomenon. It relates to a ball valve hermetic structure that can prevent the fluid from leaking due to non-uniform contact between the ball member and the elastic force applying member that can be generated by.

In addition, the present invention relates to a ball valve hermetic structure that can be used in a conventional ball valve structure.

In general, the ball valve is used as a kind of opening and closing means for installing the various flow paths to control the flow of fluid.

The ball valve structure has an inlet and an outlet configured to penetrate one side and the other side of the valve body having a handle (handle), and control the opening and closing of the valve in the connection portion of the inlet and the outlet, that is, inside the valve body. It comprises a ball support ring provided on each side so as to be in close contact with the ball member and the ball member.

The ball valve structure rotates a ball member having a through hole by operating a handle, so that the fluid flowing in the conduit flows through the inlet, the outlet, and the through hole of the ball member.

On the contrary, when the ball member is rotated by manipulating the handle, the fluid transfer passage is blocked by the ball member provided between the inlet and the outlet, thereby interrupting the flow of the fluid.

At this time, the ball support ring is a structure that is in contact with each side of the ball member, respectively, when operating the handle to block the flow of the fluid, to maintain the airtight of the ball valve structure so that the fluid does not leak.

However, since the ball support ring is repeatedly rotated by the ball member, durability may be degraded by friction, and a part may be damaged or lost.

Accordingly, there is a problem in that a space is generated between the ball member and the ball support ring, and the fluid leaks.

In addition, the ball valve structure allows the ball member to be rotated through the operation of turning the handle, and requires a large force to turn the handle by the close contact of the ball member and the ball support ring. Accordingly, by forming a long structure of the handle using the lever principle, the handle is configured to be rotated with a smaller force.

However, when the handle is formed long, if the operator unintentionally turns the handle, such as hitting the handle or caught on the hem during work, the ball valve is only partially open, the flow rate through the ball valve changes There is a problem of exposure to safety accidents.

In addition, when the ball support ring formed in the ball valve structure is made of synthetic resin such as nylon or teflon, when a high temperature fluid flows, a part of the synthetic resin is lost or becomes muggy and the shape is deformed. It will not be able to function as a valve, such as leaking.

On the other hand, when the ball support ring is made of metal, it is excellent in durability and less wear, but there is a problem that it is difficult to maintain airtight when contacting the ball member made of a metal material.

Thus, by allowing the ball member and the ball support ring to be in continuous contact, various ball valve structures have been developed that can improve the airtightness of the ball valve structure.

As one of the ball valve structures as described above, the ball valve for fluid supply is described in Korean Utility Model Publication No. 20-0369125.

1 is a cross-sectional view showing the fluid supply ball valve, the configuration of which includes a valve body (1) having a stem housing (1a); A connecting pipe 2 detachably fastened to one side of the valve body 1; A ball 3 having a through hole 3a positioned at the center of the valve body 1 to open and close the fluid passage; A ball support ring (4) in close contact with the ball (3); An annular locking projection 5 protruding from the inside of the connection pipe 2; And elastically installed between the ball support ring (4) facing the locking step (5) and elastically pressing the ball support ring (4) to the ball (3) by a constant elastic pressing force by using an extrusion repulsion force. It is comprised including (6).

The fluid supply ball valve can improve the airtightness by making the ball 3 and the ball support ring 4 closely adhere to each other even if wear occurs on the ball support ring 4 due to the elastic force of the elastic pressing means 6. have.

As another one of the ball valve structures, a ball valve is described in Korean Patent Publication No. 10-0571565.

2 is a sectional view showing the above-described ball valve, the configuration of which includes a valve body 1 having a stem housing 1a; A ball 3 positioned at the center of the valve body 1 and having a through hole 3a to control opening and closing of the fluid passage; A ball support ring (4) made of resin material in surface contact with each of both spherical surfaces of the ball (3); One end of the ball support ring (4), one end is supported on the valve body (1) and the other end is supported on the end surface side of the ball support ring (4) elastic pressing means for exerting a compression repulsion force; It is configured by.

Such a ball valve can improve the airtightness by making the ball 3 and the ball support ring 4 closely contact with each other even if wear occurs in the ball support ring 4 due to the elastic force of the elastic pressing means 6.

In view of the prior art as a whole, a ball support ring (4) is provided in contact with the ball (3), the elastic support means for elastically supporting the ball support ring (4) is provided, the ball support ring ( 4) to be in close contact with the ball (3) by the elasticity of the elastic pressing means (6).

Accordingly, even when abrasion occurs in the ball support ring 4 due to the elastic force of the elastic pressing means 6, the ball 3 and the ball support ring 4 are in close contact with each other, thereby improving airtightness.

However, when the ball support ring 4 is made of synthetic resin, when a high temperature fluid flows, a part of the ball support ring 4 positioned in the through hole 3a is caused by the fluid in a state where the ball 3 is not completely opened. There is a bending problem.

That is, one side of the ball support ring 4 is subjected to an elastic force by the elastic pressing means 6, the other side is to be interviewed to the ball 3 by the elastic force, wherein the ball support ring that is not in contact with the ball ( There is a problem that part of 4) is bent.

On the other hand, even if the ball support ring 4 is made of a metal material, the ball support ring 4 is moved to the ball (3) side by the elastic force of the elastic pressing means 6 is in close contact with the ball (3), When the eccentric phenomenon is generated by the elastic force of the elastic pressing means 6, there is a problem that the airtightness is reduced by the non-uniform contact between the ball 3 and the ball support ring (4).

That is, since the ball support ring 4 is in an oblique shape contacting the outer circumferential surface of the ball 3 by the eccentric phenomenon, there is a problem that the fluid may leak due to the airtightness decrease.

The present invention has been made to solve the above problems, the problem to be solved in the present invention by applying an elastic force to the elastic force applying member in contact with the ball member to be in close contact with the ball member, the ball valve hermetic seal which can improve airtightness To provide structure.

In addition, the elastic force applying member and the ball member of the metal material having excellent rigidity is in close contact, to provide a ball valve hermetic structure that can minimize the wear of the elastic force applying member due to the repeated rotation of the ball member.

In addition, a pair of O-rings are provided on the outer diameter surface of the elastic force applying member having a predetermined thickness, and the elastic member is inserted into the fitting groove formed on one side, so that the elastic force of the elastic member is uniformly transmitted to the elastic force applying member, thereby causing an eccentric phenomenon. It is to provide a ball valve hermetic structure which can prevent the fluid from leaking due to non-uniform contact between the ball member and the elastic force applying member that can be generated by.

In addition, it can be used in the existing ball valve structure to provide a high usability ball valve hermetic structure.

In order to solve the above problems, the ball valve hermetic structure according to the present invention is a body formed with an inclined surface therein; A coupling body coupled to the body and having a locking step formed on an inner diameter surface thereof; A ball member inserted into the body to be in contact with one side of the inclined surface and to open and close the fluid passage by manipulation of the handle; An elastic force applying member in which one side surface is in contact with the ball member, a fitting groove is formed at the other side, and a pair of groove portions are formed at the outer diameter surface; And one side is supported by the locking jaw, the other side is inserted into the fitting groove and the elastic member for applying the elastic force to the elastic force applying member; is configured to include, the ball member and the inclined surface and the elastic force applying member by the elastic force of the elastic member continuously It is intended to solve the technical problem by providing a ball valve hermetic structure characterized in that.

The present invention has a remarkable effect of improving the airtightness by applying an elastic force to the ball member to be in contact with the ball member in contact with the ball member.

In addition, the elastic force applying member and the ball member of the metal material with excellent rigidity is in close contact, and has a remarkable effect of minimizing the wear of the elastic force applying member due to the repeated rotation of the ball member.

In addition, a pair of O-rings are provided on the outer diameter surface of the elastic force applying member having a predetermined thickness, and the elastic member is inserted into the fitting groove formed on one side, so that the elastic force of the elastic member is uniformly transmitted to the elastic force applying member, thereby causing an eccentric phenomenon. It has a remarkable effect that can prevent the fluid from leaking due to non-uniform contact between the ball member and the elastic force applying member that can be generated by.

In addition, by being configured to be coupled to the existing ball valve structure, it has a significant effect to improve the usability and minimize the construction cost.

1 is a cross-sectional view showing a conventional fluid supply ball valve.

2 is a cross-sectional view showing a conventional ball valve.

3 is a front side assembled cross-sectional view of the ball valve hermetic structure according to an embodiment of the present invention.

4 is a front side exploded cross-sectional view of the ball valve hermetic structure according to an embodiment of the present invention.

5 is a perspective view of a handle in a ball valve hermetic structure according to an embodiment of the present invention.

Figure 6 is a front side cross-sectional view showing an example of applying an elastic force to both sides of the ball member in the ball valve hermetic structure according to an embodiment of the present invention.

7 is a front side assembled cross-sectional view of the ball valve hermetic structure according to another embodiment of the present invention.

8 is a front side assembled cross-sectional view of a ball valve hermetic structure according to another embodiment of the present invention.

9 is a front side exploded cross-sectional view of the ball valve hermetic structure according to another embodiment of the present invention.

10 is a front side assembled cross-sectional view of the ball valve hermetic structure according to another embodiment of the present invention.

11 is a front side exploded cross-sectional view of the ball valve hermetic structure according to another embodiment of the present invention.

The terms or words used in this specification and claims are not to be construed as limiting in their usual or dictionary meanings, and the inventors may appropriately define the concept of terms in order to best describe their invention. It should be interpreted as meaning and concept corresponding to the technical idea of the present invention based on the principle that the present invention.

Therefore, the embodiments described in the specification and the drawings shown in the drawings are only the most preferred embodiments of the present invention and do not represent all of the technical idea of the present invention, various equivalents that may be substituted for them at the time of the present application It should be understood that there may be water and variations.

Before describing the present invention with reference to the drawings, it is not shown or specifically described for the matters that are not necessary to reveal the gist of the present invention, that is, those skilled in the art can obviously add. Make a note.

The ball valve hermetic structure according to the present invention relates to a ball valve hermetic structure which can improve hermeticity by applying an elastic force to an elastic force applying member in contact with the ball member so as to be in close contact with the ball member.

Hereinafter, with reference to the accompanying drawings, a ball valve hermetic structure according to the present invention will be described.

3 is a front side assembled cross-sectional view of the ball valve hermetic structure according to an embodiment of the present invention, and FIG. 4 is a front side exploded cross-sectional view of the ball valve hermetic structure according to the embodiment of the present invention.

Ball valve hermetic structure according to an embodiment of the present invention is provided between the tube and the tube through which the fluid flows to perform a function to control the flow of the fluid, the body 100, the connection body 200, the ball member 300 ), An elastic force applying member 400 and the elastic member 500 is configured.

Body 100 is coupled to the connecting body 200, which will be described later, is provided between the tube and the pipe to perform the body function of the valve to regulate the flow of fluid, the ball member 300 can be inserted therein It provides a space, and comprises a stem member 110 and the handle 120.

At this time, the body 100 is manufactured in the form of a tube made of a solid material, such as metal or non-ferrous metal.

When the body 100 is manufactured, the inner diameter surface thereof is manufactured so that the ball member 300 to be described later is inserted and rotated, and the inclined surface 101 is formed to support the ball member 300.

3, when the ball member 300 is inserted into the body 100, the inclined surface 101 contacts the outer circumferential surface of the ball member 300 to support the ball member 300. To, it is made integral with the body 100.

Accordingly, the body 100 integrally formed with the inclined surface 101 does not need to separately manufacture the ball support ring in the existing ball valve structure, and can prevent fluid from leaking between the body and the ball support ring, and also manufacture time. In addition to shortening, there is an advantage that can minimize the manufacturing cost.

The stem member 110 forms a cylinder and is rotatably coupled to the upper side of the body 100.

At this time, the stem member 110 may be further provided with an O-ring 111, as shown in the accompanying drawings.

Depending on the design conditions, the O-ring 111 shown in the accompanying drawings is configured as a pair, but may be configured as one or more.

The handle 120 is coupled to the stem member 110 to serve as a handle so that the stem member 110 can be rotated. When the handle 120 is rotated, the ball member 300 is rotated through the stem member 110. The rotational force is transmitted to the valve to control the opening and closing of the valve.

At this time, as shown in Figure 5, the handle 120 may be configured in a circular shape. That is, it may be composed of a ring-shaped rim 121, the hub 122 is coupled to the stem member 110 and the spoke 123 connecting the rim 121 and the hub 122.

Accordingly, after controlling the opening and closing of the valve by operating the handle 120, the operator hits the handle 120 or caught on the hem during the operation can be prevented in advance to rotate the handle 120 indirectly. .

The connecting body 200 is coupled to the body 100 to perform a cover function so that the ball member 300 provided in the body 100 is not separated, and includes a locking jaw 210 formed on the inner diameter surface. do.

At this time, as shown in the accompanying drawings, the O-ring 150 may be configured between the body 100 and the connecting body 200.

In addition, the material of the connecting body 200 may be made of the same material as the body 100.

The inner diameter surface of the connecting body 200 is formed to correspond to the outer diameter surface of the elastic force applying member 400 and the elastic member 500 to be installed.

The locking jaw 210 serves to support the elastic member 500 to be described later. The ball member is applied to the elastic force applying member 400 so that the elastic force of the elastic member 500 supported by the locking jaw 210 is applied to the elastic member 500. 300 and the elastic force applying member 400 is to keep in close contact.

According to the design conditions, the locking jaw 210 as shown in the accompanying drawings, the surface in contact with the elastic member 500 to form a flat shape, the other side from the center side of the connecting body 200 to the outside It may be configured in the form of an inclined surface. Accordingly, the fluid can flow smoothly by the inclined surface.

Ball member 300 is inserted into the body 100 is coupled to the stem member 110, forms a sphere, a through hole 310 is formed in communication with one side and the other side.

The ball member 300 is rotated by applying a rotational force from the stem member 110 by the operation of the handle 120, so as to communicate with the internal space of the body 100 and the connector 200 to flow fluid or The outer circumferential surface of the ball member 300 blocks it so that the flow of fluid can be interrupted.

The elastic force applying member 400 is provided with a fitting groove 410 on one side, the other side is formed with an inclined surface 401 corresponding to the inclined surface 101 formed in the body 100 to contact the outer peripheral surface of the ball member 300 It serves to guide the rotation of the ball member 300. That is, the inclined surface 101 of the body 100 and the inclined surface 401 of the elastic force applying member 400 is configured to surround a part of the outer peripheral surface of the ball member 300, so that the ball member 300 can be rotated.

On the other hand, when a high temperature fluid flows through the ball valve, the elastic force applying member made of synthetic resin has a problem that a part is damaged or lost by the high temperature heat source.

Thus, the elastic force applying member 400 in the ball valve hermetic structure according to the present invention is manufactured in the form of a tube made of a solid material such as metal or non-ferrous metal.

Accordingly, the wear strength of the elastic force applying member 400 may be minimized due to the repetitive rotation of the ball member 300, and the elastic force applying member 400 may be prevented from being damaged or lost by a high temperature heat source. can do.

On the other hand, the elastic force applying member 400 in contact with the ball member 300 is to be in close contact with the ball member 300 by the elastic force of the elastic member 500.

By the way, the elastic force applying member 400 is moved to the ball member 300 by the elastic force of the elastic member 500 is in close contact with the ball member 300, in this case, when an eccentric phenomenon is generated by the elastic force of the elastic member 500 The non-uniform contact between the ball member 300 and the elastic force applying member 400 reduces airtightness.

That is, since the elastic force applying member 400 is in contact with the outer peripheral surface of the ball member 300 in an oblique shape by the eccentric phenomenon, there is a problem that the fluid may leak due to the air tightness.

Thus, the elastic force applying member 400 has a predetermined thickness, and a pair of grooves 420 are formed on the outer diameter surface thereof, and the O-ring 421 may be fitted into the grooves 420.

Here, the predetermined thickness means a thickness that is more than twice the thickness of the ball support ring contacting the ball member or the ball support member 450 to be described later in the conventional ball valve structure, as shown in the accompanying drawings A pair of grooves 420 are formed on the outer diameter surface of the elastic force applying member 400, and the O-rings 421 may be fitted into each of the grooves 420, and the ball may be formed by the elastic force of the elastic member 500. By minimizing the occurrence of eccentricity in close contact with the member 300 side, it is possible to prevent the fluid leakage by the non-uniform contact between the ball member 300 and the elastic force applying member 400.

Preferably, the ball support ring in contact with the ball member in the conventional ball valve structure or may be made of 2 to 4 times the thickness of the ball support member 450 to be described later.

However, the thickness may be thinner or thicker due to the structural change of the body 100 and the connection body 200.

One side of the elastic member 500 is supported by the locking jaw 210 and the other side is fitted into the fitting groove 410 to perform a function of continuously applying the elastic force to the elastic force applying member 400.

At this time, the elastic member 500 may be formed of a coil spring.

Here, the elastic force applying member 400 and the elastic member 500 may be manufactured in the form of a ring. Thus, when attempting to open the valve by operating the handle 120, the fluid can flow.

In addition, when the body 100 and the connecting body 200 are coupled, the elastic member 500 is inserted into the fitting groove 410 formed in the elastic force applying member 400, and then the elastic member 500 is formed in the connecting body 200. By being inserted into the connection body 200 to be supported by the locking jaw 210, there is an advantage that the assembly is easy.

Accordingly, the ball valve hermetic structure is a structure in which the elastic force applying member 400 of the metal material is continuously adhered to the ball member 300 by receiving the elastic force of the elastic member 500. The wear of the elastic force applying member 400 can be minimized.

In addition, a pair of O-rings 421 are provided on the outer diameter surface of the elastic force applying member 400 having a predetermined thickness, and the elastic member 500 is fitted into the fitting groove 410 formed on one side thereof, thereby providing the elastic member 500. By uniformly transmitting the elastic force of the elastic force applying member 400 can prevent the fluid from leaking due to non-uniform contact between the ball member 300 and the elastic force applying member 400 which may be caused by the eccentric phenomenon have.

According to the design conditions, as shown in Figure 6, the elastic force applying member 400 and the elastic member 500 may be configured on both sides of the ball member 300, respectively.

It should be noted that the overlapping portions of the contents already described in FIGS. 3 to 6 are not described.

Ball valve hermetic structure according to another embodiment of the present invention is the body 100, the connecting body 200, the ball member 300, the elastic force applying member 400, the ball support member 450 and the elastic member 500 It is configured to include.

Body 100 is to provide a space in which the ball member 300 can be inserted, as shown in Figure 7, the stepped portion 130 is formed in the inner diameter.

The elastic force applying member 400 has a fitting groove 410 into which the elastic member 500 is fitted at one side thereof, and the other side is provided to be in contact with the ball member 300 to guide the rotation of the ball member 300. Do this.

The ball supporting member 450 is inserted into the body 100 so that one side thereof is supported by the stepped 130 and the other side is provided to be in contact with the ball member 300 to guide the rotation of the ball member 300. By doing so, the body 100 is made of a detachable.

At this time, as shown in the accompanying drawings, the ball support member 450 has the same shape as the ball support ring that is fitted to the body in the existing ball valve structure, but is made of a metal material, grooves (outside the drawing) (Not shown) can be formed, and the O-ring is fitted into the groove portion, whereby the airtightness can be improved.

The elastic force applying member 400 and the ball support member 450 is configured to surround a part of the outer peripheral surface of the ball member 300, so that the ball member 300 can be rotated, by the elastic force of the elastic member 500 By keeping the ball member 300, the elastic force applying member 400 and the ball support member 450 in close contact, the airtightness can be improved.

In addition, the elastic force applying member 400 and the ball support member 450 is manufactured in the form of a tube made of a solid material such as metal or non-ferrous metal. Accordingly, the strength can be excellent to minimize the wear caused by the repeated rotation of the ball member (300).

In addition, after inserting the ball member 300 and the ball support member 450 to the body of the existing ball valve structure, and sequentially inserting the elastic member 500 and the elastic force applying member 400 in the connecting body 200, By combining the connection body 200 to the body of the existing ball valve structure, not only can lower the construction cost, there is an excellent usability.

8 is a front side assembled cross-sectional view of a ball valve hermetic structure according to another embodiment of the present invention, and FIG. 9 is a front side exploded cross-sectional view of a ball valve hermetic structure according to another embodiment of the present invention.

It should be noted that the overlapping portions of the contents already described with reference to FIGS. 3 to 7 are not described.

Ball valve hermetic structure according to another embodiment of the present invention is the body 100, the connecting body 200, the ball member 300, the elastic force applying member 400, the elastic member 500 and the ball contact member 600 It is configured to include.

Referring to FIG. 8, the elastic force applying member 400 is provided with a fitting groove 410 into which the elastic member 500 is fitted, and is provided between the elastic member 500 and the ball contact member 600 to provide elasticity. To perform the function of uniformly applied to the elastic force of the

ball contact member

600, 500 comprises a step 430.

At this time, the groove portion 420 is formed on the inner diameter surface of the elastic force applying member 400 in contact with the outer diameter surface of the elastic force applying member 400 and the ball contact member 600 in contact with the inner diameter surface of the connector 200. Can be formed. As a result, the O-ring 421 is inserted into the groove 420, thereby improving airtightness.

In addition, a groove portion (not shown) may be formed on the inner diameter surface of the body 100 in contact with the outer diameter surface of the ball contact member 600 supported by the step 130 of the body 100, and the O-ring is inserted into the groove portion. By doing so, the airtightness can be improved.

The ball contact member 600 is supported on each step 130 formed in the body 100 and the step 430 formed in the elastic force applying member 400, respectively provided on both sides of the ball member 300, the ball member 300 ) To guide the rotation.

The ball contact member 600 is manufactured in the form of a tube made of synthetic resin such as PP (polypropylene) or PVC (polyvinyl chloride).

On the other hand, when the elastic force of the elastic member 500 is directly transmitted to the ball contact member 600, the elastic force is uniformly applied to the ball contact member 600.

However, when the ball contact member 600 is made of synthetic resin, the through-hole 310 formed in the ball member 300 is not in complete communication with the ball contact member 600 when the ball member 300 is not completely opened. That is, a part of the ball contact member 600 is in a state where it is located in the through hole 310.

At this time, a part of the ball contact member 600 located in the through hole 310 is not in contact with the outer circumferential surface of the ball member 300, thereby being bent toward the through hole 310 by the elastic force of the elastic member 400. Problems arise.

Accordingly, the elastic force applying member 400 is provided between the elastic member 500 and the ball contact member 600 to receive the elastic force of the elastic member 500 so that it is uniformly applied to the ball contact member 600. By doing so, the phenomenon in which a part of the ball contact member 600 is bent can be prevented in advance.

In this case, the elastic force applying member 400 may be made of a rigid material such as a metal or nonferrous metal having excellent rigidity so as not to be bent by the elastic force of the elastic member 500.

According to the design conditions, the elastic force applying member 400, the elastic member 500 and the ball contact member 600 may be configured on both sides of the ball member 300, respectively.

In addition, by inserting the elastic member 500, the elastic force applying member 400 and the ball contact member 600 in sequence to the connecting member 200, by combining the connecting member 200 to the existing ball valve structure, construction Not only can the cost be lowered, but the assembly is easy and the usability is excellent.

10 is a front side assembled cross-sectional view of a ball valve hermetic structure according to another embodiment of the present invention, and FIG. 11 is a front side exploded cross-sectional view of a ball valve hermetic structure according to another embodiment of the present invention.

It should be noted that overlapping portions of the contents already described with reference to FIGS. 3 to 9 are not described.

Ball valve hermetic structure according to another embodiment of the present invention is the body 100, the connecting body 200, the ball member 300, the elastic force applying member 400, the elastic member 500, the ball contact member 600 And a bimetal member 700.

The bimetal member 700 is formed by joining two kinds of metals, and is supported on the step 430 of the elastic force applying member 400, and is provided between the elastic force applying member 400 and the ball contact member 600. When it is raised, as shown in Figure 10, bent convex to perform the function to keep the ball contact member 600 is in close contact with the outer peripheral surface of the ball member 300.

On the other hand, if a fire occurs and a part of the ball contact member 600 made of synthetic resin is damaged or lost, a space is generated between the ball member 300 and the ball contact member 600 to cause a fluid leak. do.

Therefore, the elastic force of the elastic member 500, but by additionally configuring the bimetal member 700, to have an improved effect on the functional characteristics of the ball contact member 600 in close contact with the outer peripheral surface of the ball member 300.

In addition, while the fire is in progress, the bimetal member 700 maintains a convexly curved shape, thereby preventing secondary damage caused by fluid leakage.

Here, the bimetal member 700 is formed by joining two kinds of metals having different linear expansion coefficients, and when a temperature change occurs, two kinds of metals are bent.

In this case, the large coefficient of linear expansion means that the degree of change of the metal is large when the change in temperature is large.

For example, when iron and copper are bonded and heated, the coefficient of linear expansion of copper is greater than that of iron at high temperatures, so that bending occurs in the direction in which iron is provided. 700 returns to its original form.

According to the design conditions, the elastic force applying member 400, the elastic member 500, the ball contact member 600 and the bimetal member 700 may be configured on both sides of the ball member 300, respectively.

In addition, what was described above using FIG. 3 thru | or 11 demonstrated only the main matter of this invention, and this invention is limited to the structure of FIG. It is not clear.

Claims

A body 100 having an inclined surface 101 formed therein;

A coupling body 200 coupled to the body 100 and having a locking jaw 210 formed on an inner diameter surface thereof;

A ball member (300) inserted into the body (100) and having one side surface in contact with the inclined surface (101) and opening and closing the fluid passage by manipulation of the handle (120);

An elastic force applying member 400 having one side contacted to the ball member 300, a fitting groove 410 formed at the other side, and a pair of grooves 420 formed at an outer diameter surface thereof; And

One side is supported by the locking jaw 210, the other side is inserted into the fitting groove 410, the elastic member 500 for applying an elastic force to the elastic force applying member 400;

The elastic force applying member 400 is a ball valve hermetic structure characterized in that the ball member 300 and the inclined surface 101 and the elastic force applying member 400 is in close contact by the elastic force of the elastic member 500.
The method according to claim 1,

The elastic force applying member 400 is a ball valve hermetic structure, characterized in that made of a metallic material.
The method according to claim 1,

The body 100 has a stepped 130 therein,

One side is supported on the stepped 130 and the other side is in contact with the ball member 300, the ball support member 450 for guiding the rotation of the ball member 300;

The elastic force applying member 400 has a ball valve hermetic structure, characterized in that having a thickness more than twice than the ball supporting member (450).
The method according to claim 1,

Step 430 is formed on the elastic force applying member 400,

One side is supported by the step 430 and the other side is in contact with the ball member 300, the ball contact member 600 for guiding the rotation of the ball member 300; ball further comprising a Valve hermetic structure.
The method according to claim 4,

The ball contact member 600 is a ball valve hermetic structure, characterized in that made of synthetic resin.
The method according to claim 4,

Ball valve hermetic structure, characterized in that the bimetal member 700 is further provided between the elastic force applying member 400 and the ball contact member 600.
The method according to claim 1,

The handle 120 is

Rim 121;

A hub 122 coupled to the stem member 110; And

Ball rim airtight structure, characterized in that it comprises a spoke (123) connecting the rim (121) and the hub (122).