KR102361795B1 - Rising Stem Ball Valve - Google Patents

Abstract

The present invention minimizes frictional loss as well as minimizes friction loss as the vertical inclined surface of the stem, which is inserted into the neck of the ball and lifted, can be raised and lowered by contacting a plurality of points, and also damage ( In order to minimize damage), each ball plunger is provided to reduce damage by elasticity during abnormal flow while in point contact with each vertical inclined surface and horizontal line at a predetermined distance on both sides of the inner surface of the neck of the ball to minimize (ball plunger); provides a rising stem ball valve comprising.
Accordingly, it has the effect of securing a long period of use along with rapid and smooth ascending and descending according to the reduction of friction loss, and also has the effect of securing high safety and high reliability of the product due to the reduction of damage caused by abnormal flow.

Description

Rising Stem Ball Valve

The present invention relates to a rising stem ball valve, and more particularly, friction as the vertical inclined surface of the stem, which is inserted into the neck of the ball and lifted, can be raised and lowered by contact with a plurality of points. It relates to a rising stem ball valve that minimizes loss and minimizes damage even when abnormal flow occurs.

In general, a ball valve refers to a valve that controls the flow of a fluid by rotating a spherical ball having a flow path through it to open and close an inlet and an outlet.

The ball valve maintains a close contact to prevent fluid from leaking between the valve body and the ball.

In particular, when the ball rotates in close contact with the valve body, a rising stem method has been applied in recent years due to a problem in that friction is severely generated.

That is, the rising stem rotates the ball by rotation as the stem is raised and lowered, and is configured to contact or separate the ball toward the outlet of the valve body.

Here, the neck portion of the ball is provided with a pair of roller shafts rotatably provided on both sides so that the lower end of the stem comes into contact with the vertical inclined surface of the stem in order to reduce friction caused by lifting and lowering.

In addition, the stem is provided with a guide groove so as to be elevating and rotatable at the upper part, and the lower both sides are in contact with the roller shaft provided on the neck of the ball and tilted according to the elevating seat ring provided at the outlet of the valve body. Each vertical inclined surface is formed so as to be in close contact with or spaced apart from each other.

The ball valve to which such a rising stem is applied can secure a long service life due to friction-free rotation and a seat ring provided on the ball and outlet side, as well as low torque during open/close operation due to friction-free operation have

In addition, it has the advantage of being able to seal highly and responding to thermal expansion at a high temperature.

As described above, in the prior art related to the rising stem ball valve, Korean Patent Publication No. 10-1029563, Korean Patent Publication No. 10-1313050, Korean Patent Publication No. 10-1318769, US Patent No. 5,259,590, United States It has been published in registered patent US 4,917,354 and the like (hereinafter referred to as 'prior art documents').

However, in the prior art documents, each vertical inclined surface formed at the lower end of the stem for close contact or separation from the seat ring on the outlet side of the ball and a pair of roller shafts provided on the neck of the ball is the lifting and lowering of the stem It is provided to rotate so as to reduce frictional loss due to the flow, but has a disadvantage in that smooth rotation is not achieved when foreign substances contained in the fluid get caught.

In addition, the pair of roller shafts are in contact with each vertical inclined surface of the stem by a single line contact on the horizontal line, so that the rotational force decreases as well as the vertical inclined surface of the stem according to the abnormal pressure applied to the stem due to the abnormal flow. When damage occurs in any one part, it also has a disadvantage that the entire roller shaft must be replaced.

Republic of Korea Patent Publication No. 10-1029563 Republic of Korea Patent Publication No. 10-1313050 Republic of Korea Patent Publication No. 10-1318769 US Patent No. 5,259,590 US Patent No. 4,917,354

A specific technical solution of the present invention for solving the various problems of the prior art as described above is that the vertical inclined surface of the stem, which is inserted into the neck of the ball and lifted, can be raised and lowered by contacting a plurality of points. An object of the present invention is to provide a rising stem ball valve capable of minimizing friction loss and also minimizing damage even when abnormal flow occurs.

Another specific technical problem of the present invention is to make it easier to replace the ball bludger.

Another specific technical problem of the present invention is to enable the elevation of the vertical inclined surface of the stem to be made more stably.

The specific technical solution of the present invention for solving the specific technical problem as described above is a stem having each vertical inclined surface formed on both sides of the lower end, and the vertical inclined surface is inserted into the neck of the valve body by elevating and rotating. In the rising stem ball valve comprising a ball that is in close contact with or spaced apart from the seat ring provided on the outlet side, each vertical inclined surface and a horizontal line at a predetermined interval on both sides of the inner surface of the neck are in point contact with each other and are elastic during abnormal flow (彈性) each ball plunger (ball plunger) provided to reduce the damage by; includes.

The ball plunger is any one of a press-fit method, a screw coupling method, or one that is detachably provided on the inner surface of the neck.

The housing of the ball plunger provided in a press-fitting or detachable manner on the inner surface of the neck includes being formed in a polygonal shape to prevent rotation.

Desorption of the ball plunger is formed from the upper surface of the neck to a predetermined depth by an insertion groove into which the ball plunger is inserted, and a fixing jig that is inserted into the upper portion of the insertion groove to support the ball plunger and one end is fastened to the upper surface of the neck. including detachment.

and a plurality of ball plungers are further provided on the neck of the lower portion of each ball plunger disposed on a horizontal line on the inner surface of the neck.

The present invention minimizes frictional loss as well as minimizes frictional loss as the vertical inclined surface of the stem, which is inserted into the neck of the ball and lifted, can be raised and lowered by contact with a plurality of points, and damage ( damage) can also be minimized, so it is possible to secure a long period of use with rapid and smooth ascending and descending according to friction loss reduction, as well as high safety and high reliability of the product by reducing damage caused by abnormal flow. have a possible effect.

In addition, by making it easy to replace the ball plunger, it not only provides convenience for maintenance, but also has the effect of remarkably shortening the reuse time of the rising stem ball valve after maintenance.

In addition, by allowing the vertical slope of the stem to be raised and lowered more stably, it has the effect of ensuring stable, high safety and even higher reliability.

1 is an exploded perspective view of some excerpts for explaining a first embodiment of the present invention;
2 is a plan cross-sectional view and a side cross-sectional view in a coupled state according to FIG. 1;
3 to 4 are cross-sectional views for explaining a process of opening and closing a ball to which the first embodiment of the present invention is applied;
5 is a partially exploded cross-sectional view for explaining a second embodiment of the present invention;
6 is a partial cross-sectional view for explaining a third embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the accompanying drawings, and the present invention is not limited or limited by the embodiments.

1 is a partially exploded perspective view for explaining a first embodiment of the present invention, FIG. 2 is a plan cross-sectional view and a side cross-sectional view of a coupled state according to FIG. 1, and FIGS. 3 to 4 are a first embodiment of the present invention It is a cross-sectional view for explaining the process of opening and closing the applied ball.

As shown, the rising stem ball valve 100 is a stem 110 in which each vertical inclined surface 112 is formed on both sides of the lower end as described in the technical field that is the background of the invention and published in prior art documents. , the vertical inclined surface 112 is inserted into the inside of the neck 122, and the seat ring 132A provided on the outlet 132 side of the valve body 130 by lifting and rotating the ball 120 that is in close contact or spaced apart ) has a technical configuration including

Here, when a pair of roller shafts are provided inside the neck of the ball in contact with the vertical inclined surface of the stem, there is a problem as described in the technical field that is the background of the invention.

That is, each vertical inclined surface formed at the lower end of the stem for close contact or separation from the seat ring on the outlet side of the ball and a pair of roller shafts provided on the neck of the ball can reduce friction loss due to the elevation of the stem. Although provided to rotate, it has a disadvantage in that smooth rotation is not achieved when foreign substances contained in the fluid are caught. As a result, the lifting and lowering is not performed smoothly, so that the opening and closing is not performed smoothly.

In addition, the pair of roller shafts are in contact with each vertical inclined surface of the stem by a single line contact on the horizontal line, so that the rotational force decreases as well as the vertical inclined surface of the stem according to the abnormal pressure applied to the stem due to the abnormal flow. When damage occurs in any one part, it also has a disadvantage that the entire roller shaft must be replaced.

The present invention minimizes frictional loss as well as minimizes frictional loss as the vertical inclined surface of the stem, which is inserted into the neck of the ball and lifted, can be raised and lowered by contact with a plurality of points, and damage ( damage) is also to provide a rising stem ball valve that can be minimized.

The rising stem ball valve 100 according to the present invention is in point contact with each vertical inclined surface 112 on both sides of the inner surface of the neck 122 of the ball 120 at predetermined intervals on the horizontal line, and is elastic during abnormal flow. ) each ball plunger provided to reduce damage by (ball plunger, 10); includes.

In other words, the present invention is supported by a point contact with a ball plunger provided at a predetermined interval on the vertical inclined surface of the stem and horizontally, so that the elevation of the vertical inclined surface of the stem is not affected and the elevation can be smoothly performed while , in particular, it is possible to minimize the frictional resistance with the vertical inclined surface due to point contact.

That is, due to the reduction in frictional resistance due to point contact, the vertical inclined surface of the stem can be raised and lowered more quickly, smoothly and easily.

Moreover, even when abnormal flow occurs in the process of opening and closing the ball and abnormal pressure transmitted to the vertical inclined surface through the stem is generated, it is buffered by elasticity, which is a characteristic of the ball plunger, so that damage can also be minimized.

Accordingly, it is possible to secure high safety, as well as to increase the reliability of the product.

In particular, the present invention does not have a complicated technical configuration, but minimizes the frictional resistance caused by the vertical slope elevation of the stem by a simple technical configuration, so that not only does it cause smooth elevation, but also the rotation of the stem is not affected, and the tilting of the ball is not at all does not cause any disturbance

In addition, there is a condition that can secure a long service life by reducing frictional resistance and minimizing damage caused by abnormal flow.

On the other hand, the ball plunger 10 may apply a screw coupling method (not shown) through a press-fit method or a screw processing method through hole processing on the inner surface of the neck 122, as well as to be described later for maintenance. It is preferable to provide detachably.

Here, it is preferable that the housing of the ball plunger 10 provided in a press-fit method or detachably on the inner surface of the neck 122 is formed in a polygonal shape to prevent rotation after mounting.

That is, when the housing of the ball plunger is formed in a cylindrical shape, rotation is possible by external pressure, so it is preferable to form it in a polygonal shape that can prevent rotation even under external pressure after mounting.

Accordingly, the present invention does not have a complicated technical configuration, but minimizes frictional resistance by a minimal simple structure and minimizes damage even in unexpected abnormal flow, so that opening and closing of the ball can be performed smoothly, as well as high safety Conditions to secure a long period of use can be established.

5 is a partially exploded cross-sectional view for explaining a second embodiment of the present invention.

As shown, in the above configuration, it also provides a technical configuration that can be replaced more quickly and simply when an abnormality occurs in the ball plunger.

Desorption of the ball plunger 10 is formed to a predetermined depth from the upper surface of the neck 122, the insertion groove 22 into which the ball plunger 10 is inserted, the ball plunger 10 is inserted into the upper portion of the insertion groove 22 ) while supporting the one end includes being detached by a fixing jig 20 that is fastened to the upper surface of the neck 122 by bolting or screwing.

In other words, it has the convenience of being able to quickly replace the ball plunger in a short time due to a detachable technical configuration in case an abnormality of the ball plunger occurs due to fluid or the like according to the use of the ball plunger.

That is, by separating the fixing jig from the upper surface of the neck, the ball plunger to be replaced can be simply and easily separated from the insertion groove, and by inserting a new ball plunger into the insertion groove and then fastening the fixing jig, It can be replaced easily.

Accordingly, maintenance of the ball plunger having a detachable technical configuration can also be easily performed without cumbersome or inconvenient.

6 is a partial cross-sectional view for explaining a third embodiment of the present invention.

As shown, in the above configuration, as compared to supporting the vertical inclined surface of the stem by point contact on the horizontal lines of both sides, it also provides a technical configuration that can be made more stable elevation.

A plurality of ball plungers 10 are further provided on the neck 122 under each of the ball plungers 122 arranged on a horizontal line on the inner surface of the neck 122 .

In other words, by supporting two or more points on the vertical plane compared to supporting the vertical inclined plane of the stem at one position on the horizontal by the ball plunger positioned on the horizontal and the ball plunger positioned below it, the elevation of the vertical inclined plane of the stem is more stable can be made with

In addition, it has a higher ability to respond to an abnormal flow, and there is also a condition in which higher safety can be secured.

10: ball plunger 20: fixing jig
22: insertion groove
100: Rising Stem Ball Valve
110: stem 112: vertical inclined plane
120: ball 122: neck
130: valve body 132: outlet
132A : Seat Ring

Claims (5)

A stem having each vertical inclined surface formed on both sides of the lower end, and the vertical inclined surface is inserted into the inside of the neck, and rising and falling comprising a ball that is in close contact with or spaced apart from the seat ring provided on the outlet side of the valve body by elevating and rotating A stem ball valve comprising:
Each ball plunger provided to reduce damage by elasticity during abnormal flow while in point contact with each vertical inclined surface and horizontally at a predetermined distance on both sides of the inner surface of the neck; and ,
The ball plunger is composed of any one of a press-fit method, a screw coupling method, or a detachably provided on the inner surface of the neck,
Desorption of the ball plunger is formed from the upper surface of the neck to a predetermined depth by an insertion groove into which the ball plunger is inserted, and a fixing jig that is inserted into the upper portion of the insertion groove to support the ball plunger and one end is fastened to the upper surface of the neck. A rising stem ball valve comprising a detachable one. delete The method of claim 1,
A rising stem ball valve comprising a housing of a ball plunger that is provided in a press-fitting manner or detachably on the inner surface of the neck to be formed in a polygonal shape to prevent rotation. delete The method of claim 1,
Rising stem ball valve comprising a plurality of ball plungers further provided on the neck of each of the ball plungers disposed on the horizontal line of the inner surface of the neck.

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