KR102188910B1 - High Temperature Air Sealing Butterfly Valve - Google Patents

Abstract

The present invention relates to a high-temperature air sealing butterfly valve, and more specifically, to a high-temperature air sealing butterfly valve which can block exhaust gas introduced from the outside by supplying air to perform an air sealing action in an internal shielding space while consisting of blades and body rims in pairs, can improve airtightness as the blades and the body rims are not in direct contact with each other but in contact with each other through a sheet arranged on the outer circumferential surface of the blades, and can improve operating stability as the operating resistance of the blades does not occur. To achieve the purpose, the high-temperature air sealing butterfly valve according to the present invention comprises: a valve body connected to a pipeline; a rotary shaft having both ends coupled to the inside of the valve body; a pair of blades coupled to the rotary shaft, arranged in parallel at a regular interval, and being eccentrically opposite to each other with respect to the center of the rotary shaft; a piece sheet made of a plurality of pieces, mounted to overlap one side along the circumference of the blades, and attached to the front surface of a rotation direction with respect to the rotary shaft; a pair of body rims arranged on the inner surface of the valve body with respect to a rotation center line formed by the rotary shaft, arranged so that the piece sheet is in contact with the body rims according to the rotation of the rotary shaft, and formed at each different height to prevent interference due to the rotation; and an air supply device for blocking exhaust gas by supplying air between the pair of blades in a state where the pipeline is closed.

Description

High Temperature Air Sealing Butterfly Valve

The present invention relates to an air-sealing butterfly valve for high temperature, and more particularly, an exhaust gas introduced from the outside by configuring a blade and a body rim in a double configuration, and supplying air to an air-sealing action to be achieved in an internal shielding space. High-temperature air sealing with improved operating stability, such as improved airtightness and no operating resistance of the blade, as the blade and body rim come into contact through a piece sheet provided on the outer circumference of the blade rather than through direct contact. It relates to a butterfly valve.

In general, butterfly valves are disposed on a pipe that moves fluid to selectively block the flow of fluid, and as shown in FIG. 1, a cylindrical valve body 10 connected to the pipe and the valve body 10 ) And a disk-shaped blade 20 that is rotatably installed inside the blade 20, and a driving device (not shown) for rotating the blade 20.

According to this butterfly valve, by rotating the blade 20 using a driving device, the flow path formed in the valve body 10 is opened/blocked. In this butterfly valve, the flow of fluid is completely prevented. In order to block the valve body 10, the airtightness between the inner peripheral surface of the valve body 10 and the outer peripheral edge of the blade 20 acts as a very important factor.

Accordingly, in order to improve the airtightness, various types of sealing means have been provided in the related art, and as one of them, as shown in FIG. 2, the body seat 12 is placed in the center of the inner circumferential surface of the valve body 10. There is a method of installing and installing a seat ring 22 in contact with the body sheet 12 while the blade 20 is closed on the outer periphery of the blade 20.

On the other hand, according to the prior art, in order to obtain a sealing effect, it is necessary to increase the amount of contact of the seat ring 22 with the body sheet 12 and at the same time make the seat ring 22 and the body sheet 12 in close contact with each other with strong pressure. .

Therefore, the seat ring 22 is easily damaged by a relatively high frictional force during the opening and closing operation of the blade 10, causing leakage over time, and due to the friction between the seat ring 22 and the body seat 12 There is a problem that the blade 10 does not operate smoothly.

In order to solve this, Prior Document 1 discloses a double blade valve in which a dual structure blade and a dual structure sealing rim in surface contact therewith are provided so that the sealing property is strengthened and the operation of the blade is also facilitated.

However, in Prior Literature 1, if foreign matter is introduced between the dual structure blade and the dual structure sealing rim in surface contact and is caught inside, the entire dual structure blade is not closed due to the characteristics of the blade provided as a single plate, thus blocking the flow path. There is a problem in that it becomes difficult to completely seal it.

In addition, as the left and right sealing rims provided in the valve body are not provided in a straight line with the blade and are provided spaced apart from each other around the rotation axis, many difficulties arise in manufacturing the sealing rims provided in the valve body.

Korean Registered Patent No. 10-0702209 (2007.03.26.) Korean Patent Registration No. 10-1461255 (2014.11.06.)

An object of the present invention was conceived to solve the above-described conventional problem, and a dual structure blade and a plurality of pieces of sheet provided along the outer circumferential surface of the blade are provided, so that even if foreign matter is introduced between the body rim, the entire blade is It is possible to solve the problem of not being closed, and to provide an air-sealing butterfly valve for high temperature that enhances the sealing property by providing a body rim having a dual structure in surface contact with the seat and facilitates operation of the blade.

In addition, a pair of body rims provided in the valve body are located in the same line with the blades in the closed state, thereby solving the hassle of the work process in the process of welding the body rim to the valve body, and further improving the sealing performance. It is to provide so that it can be done.

Finally, high-pressure air is supplied to a shielding space provided between the pair of blades in a state in which the pipe is closed, thereby blocking exhaust gas, thereby preventing reverse flow of exhaust gas as much as possible.

The objects of the present invention are not limited to the above-mentioned objects, and other objects that are not mentioned will be clearly understood by those of ordinary skill in the art from the following description.

In order to achieve the above object, according to the present invention, according to the present invention, the valve body connected to the pipe and the rotation shaft at which both ends are coupled within the valve body and the rotation shaft are coupled, and are arranged in parallel at regular intervals, It consists of a pair of blades eccentric in opposite directions and a plurality of pieces, and one side is mounted to overlap along the circumference of the blade, and the piece sheet attached to the front side of the rotation direction relative to the rotation axis and the rotation shaft rotates It is provided on the inner surface of the valve body with respect to the center line, and is disposed so that the piece sheet is in contact with the rotation of the rotation shaft, and the body rim and the pipe are closed to prevent interference due to rotation by being formed at different heights. In this state, it features an air supply device that blocks exhaust gas by supplying air between the pair of blades.

In addition, it is attached to the front of the piece sheet, characterized in that a plurality of clips are provided to prevent deformation of the piece sheet from the high-pressure exhaust gas.

In addition, the clip is in contact with one surface of the piece sheet, and extends from the flat portion and the flat portion provided so as to be coupled by bolting with the blade to further improve the adhesion by bringing the piece sheet into close contact with the body rim Doedoe provided to be able to, characterized in that provided with a bent portion that is bent at a predetermined angle.

In addition, it is provided in front of the flat portion, characterized in that the support plate is provided so that the clip can be further closely contacted and coupled to the piece sheet.

In addition, the body rim is characterized in that a hole penetrating the inside is provided, a gap adjusting part is inserted into the hole, and a spaced space is formed between the body rim and the piece sheet according to the length of the gap adjusting part. .

According to the high-temperature air-sealing butterfly valve according to the present invention, the blade and the body rim are composed of double, and the air-sealing effect on the shielding space is excellent, so that the blocking effect of the flow path is excellent. Since the shape of the seat and the body rim are in contact with each other, the sealing effect is excellent, the wear of the parts is small, and the operating resistance of the blade does not occur, thereby improving the operation stability.

In addition, with the configuration of a plurality of sheets provided on the outer circumferential surface of the blade, there is an effect that it is easy to replace a partial sheet due to abrasion of the sheet due to prolonged use.

In addition, as a pair of body rims are provided on the same line with the blades in a closed state, there is an effect of shortening the time and working process for forming the body rim, and further improving sealing performance.

1 is a perspective view showing a butterfly valve according to the prior art.
2 is a cross-sectional view showing the airtight structure of the blade in the butterfly valve according to the prior art.
3 is a cross-sectional view of a high temperature air sealing butterfly valve according to a preferred embodiment of the present invention.
4 is a perspective view of a high temperature air sealing butterfly valve according to a preferred embodiment of the present invention.
5 is a plan view of a high temperature air sealing butterfly valve according to a preferred embodiment of the present invention.
6 is an enlarged view showing a detailed configuration of an air sealing butterfly valve for high temperature according to a preferred embodiment of the present invention.
7 is a real photograph showing the shape and detailed configuration of a clip according to a preferred embodiment of the present invention.
8 is a cross-sectional view showing the configuration of a spacing adjustment unit provided in a body rim according to another embodiment of the present invention.

Advantages and features of the present invention, and a method of achieving them will become apparent with reference to the embodiments described below in detail together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in various forms different from each other, and only these embodiments make the disclosure of the present invention complete, and common knowledge in the technical field to which the present invention belongs. It is provided to completely inform the scope of the invention to those who have it, and the invention is only defined by the scope of the claims.

With reference to the accompanying drawings below will be described in detail for the implementation of the present invention. Regardless of the drawings, the same reference numerals refer to the same elements, and "and/or" includes each and all combinations of one or more of the mentioned items.

Although the first, second, and the like are used to describe various components, it goes without saying that these components are not limited by these terms. These terms are only used to distinguish one component from another component. Therefore, it goes without saying that the first component mentioned below may be the second component within the technical idea of the present invention.

The terms used in this specification are for describing exemplary embodiments, and are not intended to limit the present invention. In this specification, the singular form also includes the plural form unless specifically stated in the phrase. As used in the specification, “comprises” and/or “comprising” do not exclude the presence or addition of one or more other elements other than the mentioned elements.

Unless otherwise defined, all terms (including technical and scientific terms) used in the present specification may be used as meanings that can be commonly understood by those of ordinary skill in the art to which the present invention belongs. In addition, terms defined in a commonly used dictionary are not interpreted ideally or excessively unless explicitly defined specifically.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

First, the high-temperature air-sealing butterfly valve has a valve body 30 connected to a pipe, and both ends of the valve body 30 are coupled to the rotation shaft 40 and the rotation shaft 40 that are rotatably mounted. Combined, a pair of blades 50 that are arranged in parallel at regular intervals and eccentric in opposite directions with respect to the center of the rotation shaft 40 and one side overlapping the circumference of the blade 50 It is made of a piece and is provided on the inner surface of the valve body 30 based on the rotation center line formed by the piece sheet 60 and the rotation center line formed by the piece sheet 60 attached to the front in the rotation direction with respect to the rotation shaft 40, A pair that is disposed so that the piece sheet 60 comes into contact with the rotation of the rotation shaft 40, and is formed at different heights so that the degree of protrusion from the inner surface of the valve body 30 is different to prevent interference due to rotation It comprises an air supply device 80 for blocking exhaust gas by supplying air between the pair of blades 50 in a state in which the body rim 70 and the pipe passage are closed.

Hereinafter, embodiments of the present invention will be described in detail with reference to FIGS. 3 to 7.

3 is a cross-sectional view of a high temperature air sealing butterfly valve according to a preferred embodiment of the present invention, Figure 4 is a perspective view of a high temperature air sealing butterfly valve according to a preferred embodiment of the present invention, and Figure 5 is a view of the present invention. It is a plan view of a high temperature air sealing butterfly valve according to a preferred embodiment, and FIG. 6 is an enlarged view showing a detailed configuration of the high temperature air sealing butterfly valve according to a preferred embodiment of the present invention.

As shown in FIGS. 3 to 6, a hydraulic motor or a pneumatic actuator 42 may be provided on the outside of the valve body 30 as a driving means for operating the rotation shaft 40.

The hydraulic motor or the pneumatic actuator 42 may automatically open and close the blade 50 by a control unit (not shown), and the open and close operation of the blade 50 through the rotation of the handle 44 Of course, you can manually manipulate.

On the other hand, the valve is preferably provided as a butterfly valve.

The butterfly valve is a valve that adjusts the flow rate of the fluid flowing through the pipe by rotating a plate-shaped valve disk arranged on the valve pipe.It has a simple structure and is lightweight, has a fast operation, and is widely used for high pressure fluids as well as low pressure. to be.

In addition, in the present invention, as the blade 50 is configured as a double, a shielding space S is formed between the pair of blades 50 in the closed state of the blade 50.

In the closed state of the pair of blades 50, it is possible to primarily block the exhaust gas flowing therein, and in addition, the high pressure flowing through the air supply device 80 to the shielding space S inside By increasing the air pressure in the shielding space (S) by using air, it is provided so as to block the reverse flow of the exhaust gas that may leak minutely as much as possible.

That is, in order to limit the passage of the exhaust gas flowing through the flow path, compressed air is injected into the shielding space S at a pressure higher than the discharge pressure of the exhaust gas to prevent the outflow of the exhaust gas.

On the other hand, a pair of blades 50 are provided that are coupled to the rotation shaft 40 and are arranged in parallel at a predetermined interval and eccentrically opposite to each other with respect to the center of the rotation shaft 40.

The pair of blades 50 may include a first blade 50a and a second blade 50b.

Specifically, as shown in FIG. 5, when the first blade 50a is eccentric to the left, the second blade 50b is eccentric to the right, so that the tip of the pair of blades 50 is constant eccentricity. You will keep the car (I).

As an example, the material of the pair of blades 50 may be made of stainless steel, and more preferably made of stainless steel 304 or 316.

Stainless steel is a material that does not rust much compared to ordinary steel, and has strong corrosion resistance, so it is mainly used for chemical industry pipes, cylinders, pumps, and marine products.

In the present invention, the blade 50 is preferably made of a stainless steel 304 or 316 material as it has excellent corrosion resistance and should be made of a material that is not easily deformed by high temperature and high pressure.

Next, it is made of a plurality of pieces, doedoe mounted to overlap one side along the circumference of the blade 50, a piece sheet 60 attached to the front side of the rotation direction relative to the rotation shaft 40 is provided.

That is, the piece sheet 60 is attached to the front of the first and second blades 50a and 50b in the rotational direction around the rotational shaft 40, in other words, the blades based on the rotational shaft 40 The piece sheets 60 attached to the upper and lower sides of the 50 are attached in opposite directions to each other.

This is to avoid interference with a pair of body rims 70 to be described later in the direction in which the blade 50 rotates, which will be described in detail in FIG. 6(A) to be described later.

On the other hand, the piece sheet 60 is provided with an alloy steel material, excellent heat resistance and resilience, and is provided to realize sufficient strength.

In other words, the piece sheet 60 should be provided to minimize the effect of high-temperature exhaust gas, and at the same time, it is preferable to be provided with an alloy steel material because it has excellent resilience and sufficient strength.

Next, FIG. 6 is an enlarged view (A) showing a detailed configuration of the high-temperature air sealing butterfly valve, and as shown in FIG. 6, the valve body 30 based on the rotation center line formed by the rotation shaft 40 ) Is provided on the inner surface of, and is disposed so that the piece sheet 60 comes into contact with the rotation of the rotation shaft 40, and is formed at different heights to prevent interference due to rotation, and a pair of body rims 70 are provided. do.

A pair of body rims 70 provided in the valve body 30 are located on the same line with the pair of blades 50 in a closed state, so that the body rim 70 is welded to the valve body 30 or In the process of forming, the hassle of the work process can be solved.

In addition, the pair of blades 50 can be completely opened and closed at an angle of 0ㅀ ~ 90ㅀ within the valve body 30, the piece sheet 60 is the pair of body rim (70) ) And the sealing performance can be further improved due to the surface contact, not the line contact.

Additionally, the blade positioning device 32 is able to adjust the position of the blade using the blade positioning device 32 when the blade 50 is out of the angle of 0° to 90° or is not completely sealed. will be.

On the other hand, the pair of body rims 70 are attached to the first body rim (70a) and the second blade (50b) in contact with one surface of the piece sheet 60 attached to the first blade (50a). It may be provided as a second body rim (70b) in contact with one surface of the piece sheet (60).

At this time, the first body rim (70a) and the second body rim (70b) from the inner surface of the valve body (30) to correspond to the eccentric support structure of the first blade (50a) and the second blade (50b). It is formed to have different heights (b1) and (b1') so as not to be interfered with rotation.

That is, as shown in Fig. 6, when the first blade 50a is eccentric to the left with respect to the rotation shaft 40, the first body rim 70a provided on the upper side is the second blade The protruding length (b1) is configured to be short so that the piece sheet 60 attached to the (70b) can pass, and the second body rim (70b) is the piece sheet attached to the second blade (70b) ( The width b1' is long so that 60) can contact it.

Likewise, the body rim 70 provided on the lower side may be provided in a configuration having a protruding length symmetrical to the first and second body rims 70a and 70b.

In other words, a separation space is created between the blade 50 and the body rim 70 in a state in which the engraving sheet 60 is not attached, and the engraving sheet 60 is the blade ( It is attached along the outer peripheral surface of 50) to fill the spaced space.

At this time, the piece sheet 60 is mounted to overlap one side along the circumference of the blade 50, which minimizes the outflow of the exhaust gas that may occur between the gaps of each of the piece sheet 60, This is to enhance durability by increasing the bonding force between the piece sheets 60 and to prevent deformation from the high-pressure exhaust gas.

The piece sheet 60 may be provided in various shapes such as a circle, a polygon, an oval, a square, and the like, and preferably, one side in contact with the body rim side 70 is longer than the length of one side in contact with the blade 50. It is preferable to be provided in a trapezoidal shape.

On the other hand, as a method of attaching the piece sheet 60 to the blade 50, there are methods such as welding, fitting, bolt fastening, etc., but preferably, the piece sheet 60 and the corresponding position Inserting a bolt 96 into a fastening groove (not shown) provided on one side of the blade 50 so that the piece sheet 60 can be fastened to the outer circumferential surface of the blade 50 by a bolt fastening method that is fastened with a nut. It is preferable to be provided.

The bolt fastening method can easily replace only the piece sheet 60 to be replaced at the time when replacement is required as the piece sheet 60 is used for a long time, and not only reduce economic cost, but also shorten the replacement time. This can provide significant maintenance benefits.

Next, it is attached to the front of the piece sheet 60, and the piece sheet 60 is provided with a plurality of clips 90 to prevent deformation from the high-pressure exhaust gas.

In other words, when the piece sheet 60 is continuously exposed from the exhaust gas of high temperature and high pressure, deformation may occur, and to prevent this, the clip 90 is padded in front of the piece sheet 60 It is provided so that it can be mounted.

The clip 90 is in contact with one surface of the piece sheet 60 and extends from the flat portion 90a and the flat portion 90a provided to be coupled to the blade 50 by bolting. The piece sheet 60 is provided to further improve the degree of adhesion by intimate contact with the body rim 70, and is provided with a bent portion 90b that is bent at a predetermined angle.

7 is a real photograph showing the shape and detailed configuration of a clip according to a preferred embodiment of the present invention.

As shown in Figure 7, the shape of the clip 90 is extended to the flat portion (90a) and the flat portion (90a) coupled to the blade together with the bolt (96) of the piece sheet (60). It consists of a bent portion 90b provided in the front.

As an example, the bent portion 90b may be provided by being bent at a predetermined angle, preferably bent at an angle of 45° so that a portion to be bent with one end of the bent portion 90b is in line contact with the piece sheet ( It is preferable to be provided in contact with the front of 60).

In other words, the clip 90 may be provided in a plurality corresponding to the size and number of the piece sheet 60, one clip 90 is in contact with the piece sheet 60 individually It is provided so as to be in close contact with the piece sheet 60.

On the other hand, provided in front of the flat portion (90a), the support plate 98 is provided so that the clip 90 is further in close contact with the piece sheet 60 to be coupled is provided.

At least one fastening groove (not shown) may be provided on one surface of the support plate 98 so that the bolt 96 is inserted and coupled to the blade 50.

Preferably, one fastening groove (not shown) is provided on both sides of one side of the support plate 98 so that the bolt 96 can be inserted.

The support plate 98 may be provided in a rectangular shape corresponding to the shape of the flat portion 90a.

In addition, the support plate 98 may be provided to prevent axial movement of the clip 90, and the flat portion 90a is in close contact with one surface of the piece sheet 60 to generate an internal gap. Can be prevented.

Next, an air supply device 80 for blocking exhaust gas by supplying air between the pair of blades 50a and 50b is provided in a state in which the pipeline is closed.

3 to 4, an air injection unit (not shown) installed through the valve body 30 and in which an injection port is disposed into the shielding space (S) and high-pressure air are supplied through the air injection unit It consists of including an air compressor (not shown).

The air supply device 80 may further include a control unit (not shown) capable of controlling the injection of air from the air compressor.

The air supply device 80 supplies high-pressure air into the shielding space S while the conduit is closed, and at this time, the air supply device 80 is injected at a pressure greater than the pressure of the exhaust gas flowing into the conduit. desirable.

For example, the high-temperature air-sealing butterfly valve can be used as a scrubber valve for ships, and the exhaust gas discharged from the engine running in a power generation facility using a plurality of engines and one boiler flows back to the engine temporarily stopped. It can be provided to prevent it.

In particular, the exhaust gas reverse flow that allows the airtight state to be maintained without a gasket by supplying high-pressure air to the shielding space (S) inside by the blade 50 by breaking away from the conventional airtight structure due to close contact between the blade and the gasket. Of course, it can play a role for prevention.

In other words, the configuration of the clip 90 and the air pressure provided by the air supply device 80 is supplied to the upper portion of the blade 50 with respect to the rotation shaft 40 than the pressure of the exhaust gas. The gas is prevented from flowing into the shielding space (S), and the high-pressure air supplied from the air supply device 80 is also formed under the blade 50 to be greater than the pressure of the exhaust gas. It is provided to block the exhaust gas flowing in from.

As described above, in the high temperature air-sealing butterfly valve according to this embodiment, the rotation shaft 40 is operated by a driving means such as the hydraulic motor or pneumatic actuator 42 provided outside the valve body 30 As a result, the pair of blades 50a and 50b are rotated to open/block the flow path in the valve body 30. This operation will be described as follows.

First, as shown in Figure 5, when the pair of blades (50a, 50b) is an angle (0ㅀ) parallel to the longitudinal center line of the flow path formed in the valve body 30, the flow path is completely open Become a state.

And, by the operation of the hydraulic motor or the pneumatic actuator 42, the rotation shaft 40 rotates to one side, so that the pair of blades 50a, 50b to which the piece sheet 60 provided is attached When it reaches an angle (90ㅀ) perpendicular to the longitudinal center line of the flow path, the flow path is closed. In this case, the piece sheet 60 attached to the outer circumferential surface of the pair of blades 50a and 50b is the valve body Each of the first and second body rims 70a and 70b provided in 30 is in contact with each other, and the shielding space S is formed between the pair of blades 50a and 50b.

Here, the piece sheet 60 is in surface contact with the first and second body rims 70a and 70b to maintain airtightness, and since it is a structure that does not generate friction between the pair of blades 50a The piece sheet 60 and the first and second body rims 70a and 70b attached to the outer circumferential surface of (50b) are worn due to friction, or resistance is applied to the operation of the pair of blades 50a and 50b No loss occurs.

On the other hand, after the pair of blades 50a and 50b are closed, high-pressure air supplied from the air supply device 80 is injected into the shielding space S, thereby increasing the air pressure in the shielding space S. Accordingly, airtightness is improved by performing a so-called air sealing action in which the contact state between the pair of blades 50a, 50b and the first and second body rims 70a and 70b is strengthened.

Next, FIG. 8 is a cross-sectional view showing the configuration of a spacing adjustment unit provided in a body rim according to another embodiment of the present invention.

As shown in FIG. 8, the body rim 70 is provided with a hole 72 penetrating the inside, and a female thread (not shown) is formed on the inner circumferential surface.

In the hole 72, a gap adjusting part 74 provided with a male thread (not shown) is inserted, and the gap adjusting part 74 is provided on the inner circumferential surface of the hole 72 passing through the body rim 70 By being fastened by a rotational coupling with the female thread, the spacing adjustment part 74 is provided to prevent a gap from occurring in the hole 72.

At this time, one end of the spacing control unit 74 is in contact with one surface of the piece sheet 60, and between the body rim 70 and the piece sheet 60 by adjusting the length of the spacing control unit 74 A separation space (G) is formed, and is provided to adjust the separation space (G).

In other words, when the pair of blades 50 are closed, a large amount of carbon is contained in the exhaust gas flowing therein, and the carbon is accumulated and accumulated as it continuously contacts one surface of the body rim 70. And, if the above process is continuously repeated, extra time and effort are required to remove carbon.

On the other hand, high-pressure air is discharged to the shielding space (S) by the air supply device (80), and high-pressure air is also discharged to the spaced space (G), so that carbon contained in the exhaust gas is It is provided to prevent accumulation on one side of (70).

In this case, it is preferable that a plurality of the spacing adjustment units 74 are provided along the circumference of the body rim 70.

In this embodiment, as a condition for using the air supply device 80, the object to be transferred should be limited to a gas or a gas containing powder, and when transferring a liquid, the air supply device 80 It is preferable not to use.

Although the embodiments of the present invention have been described with reference to the above and the accompanying drawings, those of ordinary skill in the art to which the present invention pertains can implement the present invention in other specific forms without changing the technical spirit or essential features. You can understand that there is. Therefore, it is to be understood that the embodiments described above are illustrative and non-limiting in all respects.

30: valve body
32: blade position adjuster
40: rotary shaft
42: hydraulic motor or pneumatic actuator
44: handle
50: blade
50a: first blade
50b: second blade
60: piece sheet
70: body cream
70a: first body rim
70b: second body rim
72: hall
74: gap adjustment unit
80: air supply
90: clip
90a: flat part
90b: bend
96: bolt
98: support plate
S: Shielded space
G: space

Claims (5)

A valve body connected to the pipeline ;
A rotating shaft coupled to both ends of the valve body;
A pair of blades coupled to the rotation shaft, disposed in parallel at a predetermined interval, and eccentrically opposite to each other with respect to the center of the rotation shaft;
A piece sheet made of a plurality of pieces, doedoe mounted to overlap one side along the circumference of the blade, and attached to the front surface of the rotation direction relative to the rotation axis;
A pair of body rims provided on the inner surface of the valve body with respect to the rotation center line formed by the rotation shaft, and arranged to contact the piece sheet according to the rotation of the rotation shaft, and formed at different heights to prevent interference due to rotation ;
Including; in a state in which the pipe is closed, an air supply device for blocking exhaust gas by supplying air between the pair of blades,
The body rim is provided with a hole penetrating the inside, a gap adjusting part is inserted into the hole, and a space is formed between the body rim and the piece sheet according to the length of the gap adjusting part. Air sealed butterfly valve. The method of claim 1,
A high-temperature air-sealing butterfly valve, characterized in that it is attached to the front of the piece sheet and provided with a plurality of clips to prevent the piece sheet from being deformed from high-pressure exhaust gas. The method of claim 2
The clip is in contact with one surface of the piece sheet, and a flat portion provided to be coupled to the blade by bolting
Air sealing butterfly valve for high temperature, characterized in that it is provided to further improve the degree of adhesion by extending from the flat portion to closely contact the piece sheet to the body rim, and having a bent portion bent at a predetermined angle. The method of claim 3,
An air-sealing butterfly valve for high temperature, characterized in that it is provided in front of the flat portion and is provided with a support plate provided so that the clip is further in close contact with and coupled to the piece sheet. delete

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