KR101436292B1

KR101436292B1 - Sealing structure for ball valve

Info

Publication number: KR101436292B1
Application number: KR1020140012509A
Authority: KR
Inventors: 강석근; 강범구
Original assignee: 강석근; 강범구
Priority date: 2014-02-04
Filing date: 2014-02-04
Publication date: 2014-09-03
Also published as: WO2015119334A1

Abstract

An airtight structure of a ball valve includes a body in which an inclined surface is formed inside; a connection body coupled to the body and in which a locking step is formed at an inner circumferential surface; a ball member inserted into the body to have a side surface come in contact with the inclined surface and opening/closing a fluid passage by operation of a handle; an elastic force applied member in which a side surface comes in contact with the ball member, a fitting groove is formed at the other side, and a pair of groove portions are formed at an outer circumferential surface; and an elastic member in which one side is supported by the locking step and the other side is fitted to the fitting groove to apply elastic force to the elastic force applied member, wherein the ball member, the inclined surface, and the elastic force applied member are continuously in close contact by the elastic force of the elastic member.

Description

{SEALING STRUCTURE FOR BALL VALVE}

The present invention relates to the airtight structure of a ball valve.

More particularly, the present invention relates to a ball valve hermetic structure capable of improving airtightness by applying an elastic force to an elastic force applying member that is in contact with a ball member to come into close contact with the ball member.

To a ball valve airtight structure capable of minimizing wear of an elastic force application member due to repetition of rotation of the ball member with a structure in which an elastic force applying member made of a metal having a high rigidity and a ball member are in close contact with each other.

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 fitted 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, To a ball valve airtight structure capable of preventing a fluid from leaking due to nonuniform contact between a ball member and an elastic force applying member that can be generated by the elastic member.

The present invention also relates to a ball valve airtight structure which can be used for an existing ball valve structure and is highly usable.

In general, the ball valve is installed in various pipelines and is used as a kind of opening and closing means for interrupting the flow of the fluid.

The structure of the ball valve includes an inlet portion and an outlet portion which are connected to one side and the other side of the valve body having a handle (handle), and the opening and closing of the valve is interrupted in the connecting portion between the inlet portion and the outlet portion, And a ball support ring provided on both sides of the ball member so as to be in close contact with the ball member.

The structure of such a ball valve is a state in which the fluid flowing through the pipe runs through the inflow portion, the discharge portion and the through hole of the ball member by rotating the ball member formed with the through hole by operating the handle.

On the contrary, when the ball member is rotated by operating the handle, the fluid transfer path is blocked by the ball member provided between the inflow portion and the discharge portion, so that the flow of the fluid can be interrupted.

At this time, the ball support ring is in contact with both sides of the ball member, and functions to maintain the airtightness of the ball valve structure so as to prevent the fluid from leaking when the flow of the fluid is blocked by operating the handle.

However, the rotation of the ball member is repeated in the ball support ring, so that the durability is lowered due to the friction, and a part thereof may be damaged or lost.

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

Further, the structure of the ball valve causes the ball member to rotate through the operation of turning the handle, which requires a large force to turn the handle by the close contact between the ball member and the ball support ring. Accordingly, the structure of the handle is made longer by using the lever principle, so that the handle can be rotated with a smaller force.

However, if the handle is formed long, the operator unintentionally turns the handle, such as hitting the handle or hanging on the skirt during the operation, and the ball valve is partially opened. As the flow rate through the ball valve changes There is a problem that it is exposed to safety accident risk.

Further, when the ball supporting ring constituted by the ball valve structure is made of a synthetic resin such as nylon or Teflon, if a high temperature fluid flows, a part of the synthetic resin is lost or deformed to become a state of being deformed, The valve can not function as a valve.

On the other hand, when the ball support ring is made of metal, it has excellent durability and wear resistance, but it is difficult to maintain the airtightness when the ball support member is made of a metal material.

Thus, various ball valve structures have been developed which can improve the airtightness of the ball valve structure by making the ball member and the ball support ring continuously contact each other.

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

Fig. 1 is a cross-sectional view showing the above-described fluid supply ball valve, which comprises a valve body 1 having a stem housing 1a; A coupling tube 2 detachably coupled 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 so as to open and close the fluid passage; A ball support ring 4 which is in close contact with the ball 3; An annular stopping protrusion (5) protruding from the middle of the coupling tube (2); And a ball support ring (4) opposed to the engagement protrusion (5) and elastically biasing the ball support ring (4) to be in close contact with the ball (3) (6).

Such a ball valve for supplying fluid can improve the airtightness by allowing the ball 3 and the ball support ring 4 to come into close contact with each other even if the ball support ring 4 is abraded by the elastic force of the elastic urging means 6 have.

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

Fig. 2 is a cross-sectional view of the ball valve. Fig. 2 shows a valve body 1 having a stem housing 1a. A ball 3 located at the center of the valve body 1 and having a through hole 3a to control the opening and closing of the fluid passage; A ball support ring 4 of a resin material which is in surface contact with both spherical surfaces of the ball 3; And elastic pressing means 6 having one end supported by the valve body 1 and the other end supported by the end surface of the corresponding ball support ring 4 on one side of the ball support ring 4 to exert a compression repulsive force .

Such a ball valve can improve airtightness by causing the ball 3 and the ball support ring 4 to come into close contact with each other even if wear is generated in the ball support ring 4 by the elastic force of the elastic pressing means 6.

The ball retaining ring 4 is provided in contact with the ball 3 and the elastic urging means 6 for elastically supporting the ball retaining ring 4 is provided. 4) are continuously brought into close contact with the balls (3) by the elasticity of the elastic pressing means (6).

This ensures that the ball 3 and the ball support ring 4 are brought into close contact with each other even if wear is generated in the ball support ring 4 by the elastic force of the elastic pressing means 6, thereby improving airtightness.

However, in the case where the ball support ring 4 is made of a synthetic resin and a high temperature fluid is flowed, a part of the ball support ring 4 positioned in the through hole 3a is not fluidized by the fluid There is a problem of bending.

That is, one side of the ball support ring 4 is subjected to elastic force by the elastic pressing means 6 and the other side is brought into contact with the ball 3 by the elastic force. At this time, the ball support ring 4 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 toward the ball 3 by the elastic force of the elastic pressing means 6 and is brought into close contact with the ball 3, When the eccentricity is generated by the elastic force of the elastic pressing means 6, the ball 3 and the ball supporting ring 4 are brought into non-uniform contact with each other, and the airtightness is deteriorated.

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

Registration Utility Model Publication No. 20-0369125 (November 22, 2004) Patent Registration No. 10-0571565 (April 10, 2006)

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and it is an object of the present invention to provide a ball valve airtight seal which can improve airtightness by applying an elastic force to an elastic force applying member, Structure.

It is another object of the present invention to provide a ball valve airtight structure which minimizes abrasion of an elastic force application member due to repetition of rotation of a ball member with a structure in which an elastic force applying member of a metal material having excellent rigidity is closely contacted with 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 fitted 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, Which is capable of preventing fluid from leaking due to nonuniform contact between the ball member and the elastic force applying member which may be generated by the elastic member.

And to provide a highly usable ball valve airtight structure that can be used in conventional ball valve structures.

In order to solve the above problems, a ball valve hermetic structure according to the present invention includes: a body having an inclined surface formed therein; A coupling body coupled to the body and having a locking protrusion formed on an inner surface thereof; A ball member which is inserted into the body and is brought into contact with one side surface of the inclined surface and opens and closes the fluid passage by the operation of the handle; An elastic force application member having a ball member on one side and a fitting groove on the other side and a pair of grooves on the outer surface; And a resilient member which is supported on one side of the engaging jaw and the other side of which is fitted in the fitting groove and applies an elastic force to the elastic force application member, wherein the elasticity of the elastic member causes the ball member, the inclined surface, To thereby provide a ball valve airtight structure.

According to the present invention, an elastic force is applied to an elastic force application member that is in contact with a ball member to be brought into close contact with the ball member, thereby achieving a remarkable effect of improving airtightness.

Further, it has a remarkable effect that the abrasion of the elastic force application member due to the repetition of rotation of the ball member can be minimized with a structure in which the elastic force application member of metallic material having excellent rigidity and the ball member are in close contact with each other.

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 fitted 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, It is possible to prevent the fluid from leaking due to nonuniform contact between the ball member and the elastic force applying member which may be generated by the elastic member.

In addition, since it is configured to be able to be coupled to the existing ball valve structure, it has a remarkable effect that the usability can be improved and the cost of the construction can be minimized.

1 is a cross-sectional view showing a conventional ball valve for supplying fluid.
2 is a sectional view showing a conventional ball valve.
3 is a front side assembly cross-sectional view of a ball valve airtight structure according to an embodiment of the present invention.
4 is a front exploded cross-sectional view of a ball valve hermetic structure according to an embodiment of the present invention.
5 is a perspective view of a handle in a ball valve airtight structure according to an embodiment of the present invention.
6 is a front side sectional view showing an example of applying an elastic force to both sides of a ball member in a ball valve airtight structure according to an embodiment of the present invention.
7 is a front side assembled cross-sectional view of a ball valve airtight structure according to another embodiment of the present invention.
8 is a front side assembled cross-sectional view of a ball valve airtight structure according to another embodiment of the present invention.
9 is a front exploded cross-sectional view of a ball valve airtight structure according to another embodiment of the present invention.
10 is a front side assembled cross-sectional view of a ball valve airtight structure according to another embodiment of the present invention.
11 is a front side exploded cross-sectional view of a ball valve airtight structure according to another embodiment of the present invention.

The terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary terms and the inventor may properly define the concept of the term in order to best describe its invention It should be construed as meaning and concept consistent with the technical idea of the present invention.

Therefore, the embodiments described in the present specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention and are not intended to represent all of the technical ideas of the present invention. Therefore, various equivalents It should be understood that water and variations may be present.

Before describing the present invention with reference to the accompanying drawings, it should be noted that the present invention is not described or specifically described with respect to a known configuration that can be easily added by a person skilled in the art, Let the sound be revealed.

The ball valve hermetic structure according to the present invention relates to a ball valve hermetic structure capable of improving airtightness by applying an elastic force to an elastic force applying member in contact with a ball member to come into close contact with the ball member.

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

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

The ball valve hermetic structure according to an embodiment of the present invention is provided between a tube and a tube through which a fluid flows to control the flow of fluid. The body 100, the connector 200, the ball member 300 An elastic force application member 400, and an elastic member 500. [

The body 100 is coupled with a connector 200 to be described later, and is provided between the tube and the tube to perform a function of a valve body for interrupting the flow of the fluid. The ball body 300 is inserted into the body 100 And comprises a stem member (110) and a handle (120).

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

The inner surface of the body 100 is manufactured such that the ball member 300 described later is inserted and rotated, and the inclined surface 101 is formed so that the ball member 300 can be supported.

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 And is integrally formed with the body 100.

Accordingly, the body 100 integrally formed with the inclined surface 101 is not required to separately manufacture the ball support ring in the conventional ball valve structure, and can prevent the fluid from leaking between the body and the ball support ring, Can be shortened, and the manufacturing cost can be minimized.

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

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

Depending on the design conditions, the O-rings 111 shown in the attached drawings are configured as a pair, but they may be configured as one or more.

The handle 120 is coupled to the stem member 110 so that the stem member 110 can be rotated. When the handle 120 is operated and rotated, the ball member 300 is rotated through the stem member 110, So that the opening and closing of the valve can be controlled.

At this time, as shown in FIG. 5, the handle 120 may be formed in a circular shape. A ring 122 in the form of a ring, a hub 122 coupled to the stem member 110, and a spoke 123 connecting the rim 121 and the hub 122.

Accordingly, after opening and closing of the valve is controlled by operating the handle 120, the operator can prevent the handle 120 from being indirectly rotated due to being hit by the handle 120 or hanging on the sling during the operation .

The coupling member 200 is coupled to the body 100 to perform a cover function to prevent the ball member 300 provided in the body 100 from being detached from the coupling member 200. The coupling member 200 includes a coupling protrusion 210 formed on an inner surface thereof, do.

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

The connection member 200 may be made of the same material as the body 100.

The inner diameter surface of the coupling member 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 stopping jaw 210 functions to support a later-described elastic member 500 so that the elastic force of the elastic member 500 supported by the stopping jaw 210 is applied to the elastic force applying member 400, (300) and the elastic force application member (400).

According to the design conditions, as shown in the accompanying drawings, the engaging jaw 210 has a flat surface in contact with the elastic member 500, and the other side is in contact with the connecting member 200 from the center side to the outer side And may be configured in the form of an inclined surface. Thus, the fluid can smoothly flow through the inclined surface.

The ball member 300 is inserted into the body 100 and is coupled to the stem member 110. The ball member 300 is in the form of a sphere and has a through hole 310 communicating with one side and the other side.

The ball member 300 is rotated by receiving the rotational force from the stem member 110 by the operation of the handle 120 so that the ball member 300 communicates with the inner space of the body 100 and the coupling member 200 to allow the fluid to flow, The outer circumferential surface of the ball member 300 blocks the flow so that the flow of the fluid can be interrupted.

The elastic force application member 400 is provided with a fitting groove 410 at one side thereof and the other side is formed with an inclined surface 401 corresponding to the inclined surface 101 formed on the body 100 so as to contact the outer circumferential surface of the ball member 300 So as 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 are configured to surround a part of the outer circumferential surface of the ball member 300, thereby rotating the ball member 300.

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

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

Accordingly, it is possible to minimize the wear of the elastic force applying member 400 due to the repetition of the rotation of the ball member 300 due to the excellent strength, and to prevent the elastic force applying member 400 from being damaged or lost by the hot heat source can do.

The elastic force applying member 400 contacting the ball member 300 is continuously brought into close contact with the ball member 300 by the elastic force of the elastic member 500.

The elastic force applying member 400 is moved toward the ball member 300 by the elastic force of the elastic member 500 and is brought into close contact with the ball member 300. At this time, when the eccentric phenomenon occurs due to the elastic force of the elastic member 500 , The ball member (300) and the elastic force applying member (400) are brought into non-uniform contact with each other, whereby the airtightness is lowered.

That is, since the elastic force applying member 400 contacts the outer circumferential surface of the ball member 300 in an oblique shape due to the eccentric phenomenon, the fluid may leak due to a decrease in airtightness.

The elastic force applying member 400 has a predetermined thickness and is formed with a pair of groove portions 420 on its outer surface so that the O-ring 421 can be fitted into the groove portion 420.

Herein, the predetermined thickness means a thickness that is twice or more the thickness of the ball supporting ring or the ball supporting member 450, which is in contact with the ball member in the conventional ball valve structure. As shown in the accompanying drawings A pair of grooves 420 are formed on the outer surface of the elastic force applying member 400 and the O-rings 421 can be fitted into the grooves 420, It is possible to minimize the occurrence of the eccentric phenomenon when the ball 300 is closely contacted to the member 300 and to prevent the fluid from leaking due to uneven contact between the ball member 300 and the elastic force applying member 400.

Preferably, it may be two to four times thicker than a ball support ring or a ball support member 450, which is in contact with the ball member in a conventional ball valve structure.

However, it is needless to say that the thickness can be made thinner or thicker due to a change in the structure of the body 100 and the connecting body 200.

One side of the elastic member 500 is supported by the latching jaw 210 and the other side is fitted into the fitting groove 410 to continuously apply an elastic force to the elastic force applying member 400.

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

Here, the elastic force applying member 400 and the elastic member 500 may be manufactured in a ring shape. Thus, when the handle 120 is operated to open the valve, the fluid can flow.

When the elastic member 500 is inserted into the fitting groove 410 formed in the elastic force applying member 400 and the elastic member 500 is formed on the connecting member 200 when the body 100 and the connector 200 are coupled, And is inserted into the coupling member 200 so as to be supported by the coupling protrusion 210, thereby facilitating assembly.

Accordingly, the ball valve airtight structure has a structure in which an elastic force applying member 400 made of a metal is continuously brought into close contact with the ball member 300 by receiving the elastic force of the elastic member 500, The abrasion of the elastic force applying member 400 can be minimized.

A pair of O-rings 421 are provided on the outer 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, Is uniformly transmitted to the elastic force applying member 400 so as to prevent the fluid from leaking due to uneven contact between the ball member 300 and the elastic force applying member 400 that may be generated by the eccentric phenomenon have.

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

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

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

The ball valve airtight structure according to another embodiment of the present invention includes a body 100, a connector 200, a ball member 300, an elastic force application member 400, a ball support member 450, and an elastic member 500 .

The body 100 provides a space into which the ball member 300 can be inserted. As shown in FIG. 7, a step 130 is formed in the inner diameter thereof.

The elastic force applying member 400 has a fitting groove 410 in which the elastic member 500 is fitted and a second side of the elastic force applying member 400 is provided in contact with the ball member 300 to guide the rotation of the ball member 300 .

The ball supporting member 450 is inserted into the body 100 and one side of the ball supporting member 450 is supported by the step 130 and the other side of the ball supporting member 450 is provided to contact the ball member 300 to guide the rotation of the ball member 300 And is separated from the body 100.

In this case, as shown in the accompanying drawings, the ball supporting member 450 has the same shape as that of the ball supporting ring inserted into the body in the existing ball valve structure, and is made of a metal material, Not shown) can be formed, and air tightness can be improved by sandwiching the O-ring in the groove portion.

The elastic force applying member 400 and the ball supporting member 450 are configured to enclose a part of the outer circumferential surface of the ball member 300 so that the ball member 300 can be rotated. By the elastic force of the elastic member 500 The airtightness can be improved by allowing the ball member 300, the elastic force applying member 400, and the ball supporting member 450 to closely contact each other.

Also, the elastic force applying member 400 and the ball supporting member 450 are manufactured in the form of a tube made of a rigid material such as a metal or a non-ferrous metal. Accordingly, it is possible to minimize wear due to repetition of rotation of the ball member 300 due to its excellent strength.

The ball member 300 and the ball supporting member 450 are inserted into the body of the conventional ball valve structure and the elastic member 500 and the elastic force applying member 400 are sequentially inserted into the connecting body 200, By constructing the connecting body 200 by connecting the ball valve structure of the related art, the construction cost can be reduced and the usability is also excellent.

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

It should be noted that the overlapping portions of the contents already described in Figs. 3 to 7 are not described.

The ball valve airtight structure according to another embodiment of the present invention includes a body 100, a connecting body 200, a ball member 300, an elastic force applying member 400, an elastic member 500, and a ball contact member 600, .

8, the elastic force application member 400 is formed with a fitting groove 410 in which the elastic member 500 is inserted, and is provided between the elastic member 500 and the ball contact member 600, (500) is uniformly applied to the ball contact member (600), and includes a step (430).

At this time, a groove portion 420 is formed on the inner diameter surface of the elastic force applying member 400, which is in contact with the outer diameter surface of the elastic force applying member 400 and the outer diameter surface of the ball contact member 600, . Thus, the airtightness can be improved by fitting the O-ring 421 into the groove 420.

A groove (not shown) may be formed on the inner surface of the body 100 which is in contact with the outer surface of the ball contact member 600 supported by the step 130 of the body 100, and an O- By the loading, the airtightness can be improved.

The ball contact member 600 is supported by the step 130 formed on the body 100 and the step 430 formed on the elastic force application member 400 and is provided on both sides of the ball member 300, In the direction of rotation.

The ball contact member 600 is manufactured in the form of a tube made of a 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.

When the ball contact member 600 is made of synthetic resin and the ball member 300 is not completely opened, the through hole 310 formed in the ball member 300 does not completely communicate with the ball contact member 600 That is, a part of the ball contact member 600 is positioned in the through hole 310.

A part of the ball contact member 600 positioned in the through hole 310 is not in contact with the outer circumferential surface of the ball member 300 and thus the ball member 300 is bent toward the through hole 310 by the elastic force of the elastic member 500 Problems arise.

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

At this time, the elastic force applying member 400 may be made of a rigid material such as a metal or a non-ferrous metal having excellent rigidity so as not to be bent by the elastic force of the elastic member 500.

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.

The elastic member 500, the elastic force applying member 400 and the ball contact member 600 are sequentially inserted into the connecting body 200 and the connecting body 200 is coupled to the existing ball valve structure, The cost can be lowered and the assembling is easy and the usability is excellent.

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

It should be noted that the overlapping portions of the contents already described in Figs. 3 to 9 are not described.

The ball valve airtight structure according to another embodiment of the present invention includes a body 100, a connector 200, a ball member 300, an elastic force applying member 400, an elastic member 500, a ball contact member 600, And a bimetal member (700).

The bimetal member 700 is formed by bonding two kinds of metals and is supported by the step 430 of the elastic force application member 400 and is provided between the elastic force application member 400 and the ball contact member 600, The ball contact member 600 is convexly bent so that the ball contact member 600 is continuously brought into close contact with the outer circumferential surface of the ball member 300 as shown in FIG.

Meanwhile, if a fire is generated and a part of the ball contact member 600 made of synthetic resin is damaged or lost, a space is formed between the ball member 300 and the ball contact member 600, do.

Accordingly, the bimetal member 700 having the elastic force of the elastic member 500 is additionally provided, so that the functional characteristics of the ball contact member 600 adhering to the outer peripheral surface of the ball member 300 can be improved.

Also, while the fire is in progress, the bimetal member 700 is kept convexly curved so that the secondary damage caused by the leakage of the fluid can be prevented.

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

The large coefficient of linear expansion at this time means that the degree of change of the metal is large when the temperature change is large.

For example, when iron and copper are bonded and heat is applied, the coefficient of linear expansion of copper is higher than that of iron at high temperatures, so that a phenomenon occurs in which the iron is bent. In contrast, at low temperatures, (700) returns to its original form.

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.

3 to 11 have described only the main points of the present invention. As far as various designs can be made within the technical scope of the present invention, the present invention is limited to the configurations of Figs. 3 to 11 It is self-evident.

100: body 101, 401:
110: stem member 111, 150, 421: O-ring
120: handle 121: rim
122: hub 123: spoke
130, 430: step 200:
210: latch jaw 300: ball member
310: Through hole 400: Elastic force applying member
410: fitting groove 420: groove
450: ball support member 500: elastic member
600: ball contact member 700: bimetal member

Claims

A body (100) having a step (130) formed therein;
A coupling body 200 coupled to the body 100 and having a locking protrusion 210 formed on an inner surface thereof;
A ball member (300) inserted into the body (100) and opening / closing the fluid passage by the operation of the handle (120);
An elastic force applying member 400 having a step 430 formed on one side thereof, a fitting groove 410 formed on the other side thereof, and a pair of groove portions 420 formed on an outer surface thereof; And
The other end of the elastic member 500 is supported by the locking protrusion 210 and the other end of the elastic member 500 is inserted into the fitting groove 410 to apply an elastic force to the elastic force applying member 400.
And are supported by the step 130 formed on the body 100 and the step 430 formed on the elastic force application member 400 and are respectively provided on both sides of the ball member 300 to rotate the ball member 300 And a ball contact member (600) guiding the ball contact member (600)
The elastic force applying member 400 includes a pair of grooves 420 formed on an outer diameter surface of the elastic body 400 in contact with an inner diameter surface of the coupling member 200 and a groove 420 on the inner diameter surface contacting the outer diameter surface of the ball contact member 600 An O-ring 421 is fitted in each of the groove portions 420 and is made of a metal material and has a thickness twice as thick as that of the ball contact member 600. The elastic force of the elastic member 500, The eccentric phenomenon is suppressed when the ball 300 is closely contacted with the member 300 to prevent the fluid from leaking due to nonuniform contact between the ball member 300 and the elastic force applying member 400,
The ball contact member 600 is made of synthetic resin,
A bimetal member 700 is further provided between the elastic force application member 400 and the ball contact member 600,
The handle 120 includes a rim 121; A hub 122 coupled to the stem member 110; And a spoke (123) connecting the rim (121) and the hub (122)
Wherein the elastic force applying member (400) allows the ball member (300) and the ball contact member (600) to be closely contacted by the elastic force of the elastic member (500).

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