KR101182706B1 - Top sealing apparatus for plug valve - Google Patents

Abstract

The present invention relates to a device for sealing a plug valve, and in particular, to allow the flange to pressurize the thrust collar in contact with the diaphragm so that a uniform pressure is applied to the diaphragm while reducing the diameter of the diaphragm significantly. Top sealing device of plug valve.

Description

Top sealing apparatus for plug valve

The present invention relates to a device for sealing a plug valve, and in particular, to allow the flange to pressurize the thrust collar in contact with the diaphragm so that a uniform pressure is applied to the diaphragm while reducing the diameter of the diaphragm significantly. Top sealing device of plug valve.

In general, the plug valve refers to a valve that regulates the flow of the valve by using a plug.

As shown in FIG. 1, the plug valve PV has a plug PL disposed inside the valve body VB, and the plug PL is surrounded by a sleeve SL.

The upper portion of the valve body VB is protruded from the upper end of the plug PL and is connected to a plug PL operation unit (not shown).

Meanwhile, a diaphragm 14 and a trust collar 13 are disposed between the top cover TC and the upper portion of the valve body VB to seal the plug PL and the upper portion of the valve body VB.

The diaphragm 14 has a disc shape and is disposed between the top cover TC and the valve body VB to serve as a sealing role.

As shown, the diaphragm 14 may include a metal diaphragm 14a made of metal and a PTFE diaphragm 14b made of PTFE.

The thrust collar 13 has a disc shape having an open center, and the thrust collar 13 presses the diaphragm 14 to maintain a sealing.

At this time, the trust collar 13 is pressed by the fixing means F passing through the top cover TC as shown in FIG. 2.

As described above, the thrust collar 13 squeezes the diaphragm 14 by the fixing means F as described above, and maintains the sealing as described above, wherein the delta ring 15 is formed on the bottom of the diaphragm 14. Disposed so that the diaphragm 14 is crushed.

A plurality of fastening means (F) such as bolts for pressing the trust collar 13 is arranged as shown in FIG.

In other words, the plurality of fixing means F is configured to press the trust collar 13, respectively, and the conventional sealing apparatus has the following problems.

First, the thrust collar 13 is pressed by a plurality of fixing means (F), respectively, so that the pressure applied to each of the portions pressed by the fixing means (F) may cause a problem in the sealing, the non-uniformity as described above There is a problem that the diaphragm 14 may be damaged due to a pressure.

Second, the plug PL includes a plug body PL1 for intermittent flow and a plug shaft PL2 protruding from an upper surface of the plug body PL1, wherein the diameter of the diaphragm 14 is It is similar to the diameter of the top surface of the top cover TC.

That is, although the diaphragm 14 uses expensive PTFE (Polytetrafluoroethylene; 4 fluorinated ethylene resin) material, the diaphragm 14 has a problem in that the manufacturing cost increases because the area of the diaphragm 14 is as large as the area of the top cover TC.

The present invention has been made to solve the above-mentioned problems, by preventing the breakage of the diaphragm by pressing the thrust collar in contact with the diaphragm to apply a uniform pressure to the diaphragm while the diameter of the diaphragm It is an object of the present invention to provide a top salling device for a plug valve that can reduce manufacturing costs by reducing the cost.

The present invention, which can achieve the above object, is a top sealing device 100 mounted on a valve body VB to seal an upper portion of a plug valve PV, and installed on a plug PL to provide a diaphragm 14. The top of the plug valve including a thrust collar 13 to pressurize and an adjustment flange 110 disposed above the thrust collar 13 as the plug PL penetrates to press the thrust collar 13. The sealing device has one feature.

In addition, the present invention is installed on the top of the valve body (VB), the diaphragm is mounted between the top cover (TC) through which the plug (PL) and the bottom surface of the top cover (TC) and the plug (PL) ( 14) and a thrust collar 13 for pressing the diaphragm 14, wherein the plug PL penetrates and is disposed on an upper surface of the top cover TC so as to pass through the thrust collar. The adjusting means 120 which is in contact with the adjusting flange 110 and the adjusting cover 110 is mounted to the top cover TC to adjust the distance between the adjusting flange 110 and the top cover TC. There is another feature to the top sealing device of the plug valve further comprises.

In this case, the thrust collar 13 may have a hollow cylindrical shape but may extend in the height direction of the plug PL.

In addition, the diaphragm 14 pressurized by the thrust collar 13 has a disk shape, the plug PL penetrates through a central portion thereof, and the radius thereof is larger than the radius of the top surface of the plug body PL1. It can be formed to be small.

In addition, it is also possible to further include a ring-shaped packing 180 disposed between the top cover (TC) and the trust collar (13).

In addition, it is also possible to further include a gland 160 disposed on the packing 180 to press the packing 180.

In addition, by pressing the gland 160 is disposed between the top cover (TC) and the adjusting flange 110, the gland flange 180 and the gland flange 180 through which the plug penetrates, It is also possible to further include a fixing means (F) for fixing to the top cover (TC).

In addition, the adjusting flange 110 includes a ring-shaped flange body 111 and a plurality of protrusions 112 projecting in the radial direction of the flange body 111 but spaced at a predetermined angle, the adjusting means It is also possible to allow the 120 to be mounted on the top cover TC after passing through the protrusion 111.

As described above, a uniform pressure is applied to the diaphragm to prevent breakage of the diaphragm, and the diameter of the diaphragm can be reduced, thereby reducing manufacturing costs.

1 and 2 are an exploded perspective view and a cross-sectional view of a conventional sealing device,
3 and 4 are exploded perspective and sectional views of the sealing apparatus of the present invention.

Before describing the various embodiments of the present invention in detail, it will be appreciated that the application is not limited to the details of construction and arrangement of components described in the following detailed description or illustrated in the drawings.

The invention may be embodied and carried out in other embodiments and carried out in various ways.

In addition, device or element orientation (e.g., "front", "back", "up", "down", "top", "bottom" The expressions and predicates used herein with respect to terms such as "," left "," right "," lateral ", etc. are used merely to simplify the description of the present invention, It will be appreciated that the element does not simply indicate or mean that it should have a particular direction.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings. Prior to this, terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary terms, and the inventor should appropriately interpret the concepts of the terms appropriately It should be interpreted in accordance with the meaning and concept consistent with the technical idea of the present invention based on the principle that it can be defined.

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

Hereinafter, the present invention will be described in detail with reference to FIGS. 3 and 4.

The present invention is a top sealing device 100 installed on the valve body (VB) to seal the upper portion of the plug valve (PV) as described above, the thrust collar is installed on the plug (PL) to press the diaphragm 14 (13) and an adjusting flange (110) disposed above the trust collar (13) through which the plug (PL) penetrates and presses the trust collar (13).

Conventionally, as described above, a plurality of fixing means F (see FIGS. 1 and 2), such as bolts, respectively, pressurize the diaphragms 14.

Therefore, the pressure applied to the diaphragm 14 often becomes uneven, and the diaphragm 14 is often damaged.

In addition, the conventional diaphragm 14 has a problem that the manufacturing cost is increased by using a large area.

The present invention is to solve this problem, it is to equalize the pressure applied to the diaphragm 14 by pressing the diaphragm 14 to the ring-shaped adjustment flange 110 rather than the fixing means. By reducing the diameter of the diaphragm 14 it is possible to reduce the manufacturing cost.

It will be described in more detail through the following examples.

Example

The present invention is mounted on the valve body (VB) as described above, while the top cover (TC) through which the plug (PL) penetrates and is mounted between the bottom surface of the top cover (TC) and the plug (PL) A top sealing device comprising a prem (14) and a trust collar (13) for pressing the diaphragm (14).

In this case, the plug PL penetrates and is disposed on an upper surface of the top cover TC to contact the thrust collar 13 and the adjustment flange 110, and then passes through the adjustment flange 110. It is attached to the cover (TC) includes an adjustment means 120 for adjusting the distance between the adjustment flange 110 and the top cover (TC).

That is, unlike the related art, the diaphragm 14 presses the adjusting flange 110 so that a uniform pressure is applied to the diaphragm 14.

The adjustment flange 110 is to adjust the interval of the top cover (TC) by the adjustment means 120.

In other words, when the adjusting flange 110 is lowered in the lower direction (direction I) in the drawing by the adjusting means 120, the adjusting flange 110 presses the thrust collar 13 and finally the diaphragm. Pressing 14 will perform sealing.

At this time, the diaphragm 14 is crushed by the delta ring 15 disposed on the bottom surface of the diaphragm 14 is the same as in the prior art.

Meanwhile, the adjusting means 120 may use a screw.

By rotating the screw, the gap between the adjusting flange 110 and the top cover TC may be narrowed to press the adjusting flange 110 as described above.

That is, even if one of the adjusting means 120 of the plurality of adjusting means 120 is rotated by this, the diaphragm 14 is pressed while the adjusting flange 110 as a whole is lowered. The pressure applied is uniform.

When the adjusting flange 110 is finally lowered while rotating the remaining adjusting means 120, the pressure applied to the diaphragm 14 becomes more uniform than before.

Therefore, the thrust collar 13 does not need to have a large diameter as in the related art, and has a hollow cylindrical shape as shown in FIGS. 3 and 4, but in the height direction (direction I) of the plug PL. It may be extended.

In the case of the diaphragm 14, the diaphragm 14 does not need to have a large diameter as in the related art, and has a disk shape as shown in FIGS. 3 and 4, wherein the plug PL is penetrated through a central portion thereof. The radius may be formed to be smaller than the radius of the top surface PL3 of the plug body PL1.

As described above, the plug PL includes a plug body PL1 for intermittent fluid flow and a plug shaft PL2 protruding from the top surface PL3 of the plug body PL1.

At this time, the diaphragm 14 is disposed on the upper surface PL3 of the plug body PL1. In the related art, the diameter of the diaphragm 14 is very large, and the top cover TC and the valve body VB, 1 and 2).

However, in the case of the present invention, the pressure applied to the diaphragm 14 can be made uniform by the adjusting flange 110 and the adjusting means 120 as described above, so that the diameter of the plug body PL1 is smaller than that of the related art. Even if it is formed to be smaller than the radius of the upper surface PL3, there is no problem in sealing, thereby reducing the manufacturing cost.

Meanwhile, the adjusting flange 110 includes a ring-shaped flange body 111 and a plurality of protrusions 112 protruding in a radial direction of the flange body 111 but spaced at a predetermined angle. It is also possible to allow the 120 to be mounted on the top cover TC after passing through the protrusion 112.

On the other hand, the protrusion 112 is a narrow form (112a) as shown, one adjustment means 120 can be penetrated, on the contrary a wide form (112b) a plurality of adjustment means 120 is It is also possible to penetrate.

Meanwhile, a ring-shaped packing 180 disposed between the top cover TC and the trust collar 13 may be further included to maintain airtightness between the trust collar 13 and the plug PL. .

In addition, the gland 160 disposed on the packing 180 to press the packing 180, and press the gland 160 between the top cover (TC) and the adjustment flange 110 It is also possible to further include a gland flange 170 through which the plug PL is penetrated to pressurize the gland 160 more stably.

For this purpose, it is also preferable to further include a fixing means (F) for fixing the gland flange 170 to the top cover (TC).

Meanwhile, the gland 160 and the packing 180 are well known, and thus detailed illustration thereof will be omitted.

13: trust collar 14: diaphragm
110: adjusting flange 120: adjusting means
PL: Plug VB: Valve Body

Claims (9)

A top sealing device 100 mounted on the valve body VB to seal the upper portion of the plug valve PV,
A thrust collar 13 for pressing the diaphragm 14 mounted on the plug PL,
The plug PL is penetrated and includes an adjustment flange 110 disposed on the thrust collar 13 to press the thrust collar 13,
The adjusting flange 110 and the ring-shaped flange body 111,
Protruding in the radial direction of the flange body 111, including a plurality of protrusions 112 are spaced at a predetermined angle,
Top sealing device of the plug valve, characterized in that the adjustment means 120 is mounted to the top cover (TC) after passing through the protrusion (112). The diaphragm 14 and the dia which are mounted on the valve body VB and mounted between the top cover TC through which the plug PL penetrates, and a bottom surface of the top cover TC and the plug PL. In the top sealing device comprising a trust collar 13 for pressing the prem 14,
An adjustment flange 110 through which the plug PL penetrates and is disposed on an upper surface of the top cover TC to contact the thrust collar;
After passing through the adjustment flange 110 includes a control means 120 mounted on the top cover (TC) to adjust the distance between the adjustment flange 110 and the top cover (TC),
The adjusting flange 110 and the ring-shaped flange body 111,
Protruding in the radial direction of the flange body 111, including a plurality of protrusions 112 are spaced at a predetermined angle,
Top sealing device of the plug valve, characterized in that the adjustment means 120 is mounted to the top cover (TC) after passing through the protrusion (112). The method of claim 2,
The thrust collar (13) has a hollow cylindrical shape, but the top sealing device of the plug valve, characterized in that formed extending in the height direction of the plug (PL). The method of claim 3,
The diaphragm 14 pressurized by the thrust collar 13 has a disk shape, the plug PL penetrates through a central portion thereof, while the radius is a radius of the top surface PL3 of the plug body PL1. Top sealing device of a plug valve, characterized in that the smaller. The method of claim 2,
The top sealing device of the plug valve further comprises a ring-shaped packing (180) disposed between the top cover (TC) and the trust collar (13). The method of claim 5,
The top sealing device of the plug valve, characterized in that it further comprises a gland (160) disposed on the packing (180) to press the packing (180). The method of claim 6,
A gland flange 170 disposed between the top cover TC and the adjustment flange 110 to pressurize the gland 160 and through which the plug penetrates;
The top sealing device of the plug valve further comprises a fixing means (F) for fixing the gland flange (170) to the top cover (TC). delete The method of claim 2,
The adjustment means 120 is a plug valve top sealing device of the thrust collar pressurization method, characterized in that the screw.

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