JP2021085521A - Air seal butterfly valve for high temperature - Google Patents

Abstract

To provide an air seal butterfly valve for high temperature.SOLUTION: An air seal butterfly valve for high temperature according to the present invention includes: (1) a valve body connected to a duct; (2) a rotary shaft having both ends coupled inside the valve body; (3) a pair of blades coupled to the rotary shaft and arranged at a certain interval in parallel with each other to be eccentric in mutually opposite directions with respect to the center of the rotary shaft; (4) a sheet piece which consists of many small pieces, and is mounted with one side overlapping the blades along circumferences thereof and also fitted to the front side in the rotating direction with respect to the rotary shaft; (5) a pair of body rims which are installed on the inner surface of the valve body to be arranged with respect to the rotational center line that the rotary shaft forms, arranged so that the sheet piece comes into contact as the rotary shaft rotates, and formed to have mutually different heights to prevent interference due to rotation; and (6) an air supply device which supplies air between the pair of blades with the duct closed to cut off an exhaust gas.SELECTED DRAWING: Figure 3

Description

The present invention relates to a high temperature air seal butterfly valve, and more specifically, the blade and the body rim are doubly configured, and air is supplied so as to act as an air seal in the internal shielding space, thereby exhaust gas flowing in from the outside. The gas can be shut off, and the blade and the body rim do not come into direct contact with each other, but come into contact with each other through a sheet piece provided on the outer peripheral surface of the blade, thereby improving the airtightness and generating no operating resistance of the blade. For high temperature air seal butterfly valves with improved operational stability.

Generally, the butterfly valve is arranged on a pipeline for moving the fluid to selectively block the flow of the fluid, and as shown in FIG. 1, the butterfly valve and the cylindrical valve body 10 connected to the pipeline are used. It is composed of a disk-shaped blade 20 rotatably provided inside the valve body 10 and a drive device (not shown) for rotating the blade 20.

According to such a butterfly valve, the blade 20 is rotated by using a driving device to open / shut off the flow path formed in the valve body 10, but the fluid in such a butterfly valve is operated. The airtightness between the inner peripheral surface of the valve body 10 and the outer peripheral surface of the blade 20 acts as a very important factor for completely shutting off the flow.

Therefore, in order to improve such airtightness, various types of sealing means have been conventionally provided. As an example thereof, as shown in FIG. 2, the body sheet 12 is installed at the center of the inner peripheral surface of the valve body 10, and the outer peripheral edge of the blade 20 is a sheet that comes into contact with the body sheet 12 in a closed state. There is a method of installing the ring 22 and the like.

On the other hand, according to such a conventional technique, in order to obtain the sealing effect, the amount of contact of the seat ring 22 with the body sheet 12 is increased, and the seat ring 22 and the body sheet 12 are brought into close contact with each other with a strong pressure. Must be.

Therefore, the seat ring 22 is easily damaged by a relatively high frictional force when the blade 10 is opened and closed, a leak is generated with the passage of time, and the blade 10 is operated due to the friction between the seat ring 22 and the body seat 12. There was a problem that it was not smooth.

In order to solve this problem, Patent Document 1 provides a double-structured blade and a double-structured seal rim that comes into surface contact with the blade, so that the airtightness is strengthened and the blade can be easily operated. The blade valve is disclosed.

However, in Patent Document 1, when foreign matter flows between the double-structured seal rims that come into surface contact with the double-structured blade and enters the inside, due to the characteristics of the blade provided as one flat plate, the double-structured blade has a double-structured structure. There is a problem that the entire blade is not closed, and it becomes difficult to perform perfect sealing when blocking the flow path.

In addition, the left and right sealing rims provided on the valve body are not provided in line with the blade, but are provided apart from each other around the rotation axis, which makes it difficult to manufacture the sealing rim provided on the valve body. Occurs.

Korean Patent No. 10-0702209 (March 26, 2007) Korean Patent No. 10-461255 (November 6, 2014)

The present invention has been made to solve such conventional problems, and an object of the present invention is to provide a blade having a double structure and a large number of small piece-shaped sheets provided along the outer peripheral surface of the blade. It is possible to solve the problem that the entire blade is not closed even if foreign matter flows between the body rims, and the double-structured body rim that comes into surface contact with the seat enhances the airtightness and operates the blade. It is also to provide an air seal butterfly valve for high temperature which is easily performed.

Another object of the present invention is to reduce the troublesome work process in the process of welding the body rim to the valve body by locating the pair of body rims provided on the valve body on the same line as the blade in the closed state. The purpose is to provide a high temperature air seal butterfly valve that can solve the problem and further improve the sealing performance.

Another object of the present invention is to supply high-pressure air to a shielding space provided between the pair of blades in a state where the pipeline is closed to shut off the exhaust gas. An object of the present invention is to provide a high temperature air seal butterfly valve capable of maximally blocking backflow.

The object of the present invention is not limited to the above-mentioned object, and another object not described above will be clearly understood by a person having ordinary knowledge in the technical field of the present invention from the following description.

In order to achieve the above object, according to the present invention, (1) a valve body connected to a pipeline, (2) a rotating shaft in which both ends are connected in the valve body, and (3) the rotating shaft. It consists of a pair of blades that are coupled to each other, arranged parallel to each other at regular intervals, and eccentric in opposite directions with respect to the center of the axis of rotation, and (4) a large number of small pieces around the blade. Along with the seat piece, which is mounted so that one side overlaps and is attached to the front surface in the rotation direction with respect to the rotation axis (the surface located in front when rotating to open the valve), and (5) the rotation. The valve body is provided on the inner surface of the valve body with reference to the rotation center line formed by the shaft, and the seat pieces are arranged so as to come into contact with each other as the rotation shaft rotates, and are formed at different heights (protruding heights). It includes a pair of body rims that prevent interference due to rotation, and (6) an air supply device that supplies air between the pair of blades to shut off exhaust gas while the conduit is closed. Provided is an air seal butterfly valve for high temperature, which is characterized by the above.

Further, it is characterized in that a plurality of clips are provided so as to be overlapped with each other in front of the sheet piece and to prevent the sheet piece from being deformed by high-pressure exhaust gas.

Further, the clip has (1) a flat surface portion provided so as to come into contact with one surface of the sheet piece and can be connected to the blade by bolt fastening, and (2) extend from the flat surface portion to attach the sheet piece to the body rim. It is provided so that it can be brought into close contact with each other to further improve the degree of close contact, and is characterized by being composed of a bent portion that can be bent at a predetermined angle.

Further, it is provided in front of the flat surface portion, and is provided with a support plate for allowing the clip to be further closely attached to the sheet piece.

Further, the body rim is provided with a hole penetrating the inside, an interval adjusting portion is inserted into the hole, and a separation space is formed between the body rim and the sheet piece according to the length of the interval adjusting portion. It is characterized by that.

According to the high temperature air seal butterfly valve according to the present invention, the blade and the body rim are doubly configured, and the air sealing action on the shielded space acts, so that the flow path blocking effect is excellent, and the blade and the body rim are along the outer peripheral surface of the blade. Since the body rim is in surface contact with a large number of small piece-shaped sheets that are provided so that they are evenly distributed, the sealing effect is excellent, the parts are less worn, and the operating resistance of the blade does not occur. It has the effect of improving.

Further, the configuration of a large number of sheets provided on the outer peripheral surface of the blade has an effect that it is easy to partially replace the sheet due to wear of the sheet due to long-term use.

Further, since the pair of body rims are provided on the same line as the blades in the closed state, there is an effect that the time and work process for forming the body rims can be shortened and the sealing performance can be further improved.

It is a perspective view which shows the butterfly valve by a prior art. It is sectional drawing which shows the airtight structure of the blade in the butterfly valve by the prior art. It is sectional drawing of the air seal butterfly valve for high temperature which concerns on a preferred embodiment of this invention. It is a perspective view (photograph) of the air seal butterfly valve for high temperature which concerns on a preferred embodiment of this invention. It is a top view of the high temperature air seal butterfly valve which concerns on a preferred embodiment of this invention when viewed from the direction of rotation axis. It is an enlarged view which shows the detailed structure of the air seal butterfly valve for high temperature which concerns on a preferred embodiment of this invention. It is an actual photograph which shows the shape and the detailed structure of the clip which concerns on a preferred embodiment of this invention. It is sectional drawing which shows the structure of the space adjustment part provided in the body rim which concerns on another Embodiment of this invention.

The advantages and features of the present invention, and the methods for achieving them, will become clear with reference to the embodiments described in detail below with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, and is realized in various forms different from each other. However, the present embodiment is provided to complete the disclosure of the present invention and to fully inform a person having ordinary knowledge in the technical field to which the present invention belongs of the scope of the invention. Is defined only by the claims.

Hereinafter, specific contents for carrying out the present invention will be described in detail with reference to the accompanying drawings. Regardless of the drawing, the same part number refers to the same component, and "and / or" includes each of the items listed and all combinations of one or more.

Although used to describe various components such as first, second, etc., these components are not limited by these terms. These terms are used to distinguish one component from the other. Therefore, the first component described below may be the second component within the technical idea of the present invention.

The terms used herein are for purposes of describing embodiments and are not intended to limit the invention. In the present specification, the singular form also includes the plural form unless otherwise specified. As used herein, "comprises" and / or "comprising" does not preclude the presence or addition of one or more other components in addition to the components described.

Unless otherwise defined, all terms used herein (including technical and scientific terms) are used in a way that is commonly understood by those with ordinary knowledge in the technical field to which the present invention belongs. it can. Also, terms defined in commonly used dictionaries are not ideally or over-interpreted unless explicitly specifically defined.

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

First, the high temperature air seal butterfly valve includes (1) a valve body 30 connected to a pipeline, and (2) a rotating shaft 40 which is rotatably mounted at both ends of the valve body 30. (3) A pair of blades 50 that are coupled to the rotating shaft 40, arranged parallel to each other at regular intervals, and eccentric in opposite directions with respect to the center of the rotating shaft 40, and (4) the blades. A sheet piece 60, which is composed of a large number of small pieces so as to overlap one side of the 50 and is attached to the front surface in the rotation direction with respect to the rotation shaft 40, and (5) the rotation formed by the rotation shaft 40. The valve body 30 is provided on the inner surface of the valve body 30 so as to be arranged with reference to the center line, and the seat piece 60 is arranged so as to come into contact with the rotation of the rotating shaft 40 from the inner surface of the valve body 30. A pair of body rims 70 that are formed at different heights to prevent interference due to rotation because they are configured to have different degrees of protrusion, and (6) the pair of blades 50 with the conduit closed. It includes an air supply device 80 that supplies air between the valves and shuts off the exhaust gas.

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

FIG. 3 is a sectional view of a high temperature air seal butterfly valve according to a preferred embodiment of the present invention, FIG. 4 is a perspective view of a high temperature air seal butterfly valve according to a preferred embodiment of the present invention, and FIG. 5 is a preferred view of the present invention. A plan view of the high temperature air seal butterfly valve according to the embodiment as viewed from the rotation axis direction, and FIG. 6 is an enlarged view showing a detailed configuration of the high temperature air seal butterfly valve according to the preferred embodiment of the present invention.

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

The hydraulic motor or the pneumatic actuator 42 can automatically open and close the blade 50 by a control unit (not shown), and manually open and close the blade 50 through the rotation of the handle 44. It can be operated with.

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

The butterfly valve is a valve that adjusts the flow rate of fluid flowing through the pipeline by turning a plate-shaped valve disc arranged on the pipeline of the valve, and has a simple structure, is lightweight, operates quickly, and has a low pressure. It is a valve that is widely used not only for high-pressure fluids but also for high-pressure fluids.

Further, in the present invention, since the blades 50 are doubly configured, a shielding space S is formed between the pair of the blades 50 in a state where the blades 50 are closed.

When the pair of blades 50 are closed, the exhaust gas flowing inside can be temporarily shut off, and the high-pressure air flowing into the shielding space S inside through the air supply device 80. By increasing the air pressure in the shielded space S by using the above, it is configured to play a role of maximally blocking the backflow of exhaust gas that may leak finely.

That is, compressed air is injected into the shielding space S at a pressure higher than the exhaust gas discharge pressure so that the passage of the exhaust gas flowing through the flow path can be restricted, and the exhaust gas is secondarily exhausted. It prevents the outflow of gas.

On the other hand, a pair of the blades 50 that are coupled to the rotating shaft 40, arranged in parallel at regular intervals, and eccentric in opposite directions with respect to the center of the rotating shaft 40 are provided.

The pair of blades 50 can be composed of 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 side, the second blade 50b is eccentric to the right side, so that the tips of the pair of the blades 50 have a constant eccentricity difference I. maintain.

As an example, the material of the pair of blades 50 is stainless steel, preferably SUS304 or SUS316.

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

Also in the present invention, the blade 50 must be made of a material having excellent corrosion resistance and not easily deformed by high temperature and high pressure, and therefore, it is preferably made of stainless steel SUS304 or SUS316.

Next, it is composed of a large number of small pieces, and is provided with a seat piece 60 which is attached to the blade 50 so as to overlap one side along the blade 50 and is attached to the front surface in the rotation direction with respect to the rotation shaft 40. Be done.

That is, the sheet piece 60 is attached to the front surface in the rotation direction of the first and second blades 50a and 50b with the rotation shaft 40 as the center, in other words, with reference to the rotation shaft 40. The sheet pieces 60 attached to the upper side and the lower side of the blade 50 are attached to opposite sides (inside and outside of the first and second blades 50a and 50b).

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

On the other hand, the sheet piece 60 is made of a material of alloy steel (Alloy Steel) and is provided so as to be excellent in heat resistance and restoration elasticity and to be able to realize sufficient strength.

In other words, the sheet piece 60 must be provided so that the influence of high temperature exhaust gas can be minimized, and also has excellent restoration elasticity and sufficient strength. Therefore, it is preferable to use alloy steel as the material.

FIG. 6 is an enlarged view (location A in FIG. 5) showing a detailed configuration of the high temperature air seal butterfly valve. As shown in FIG. 6, the seat piece 60 is provided on the inner surface of the valve body 30 with reference to the rotation center line formed by the rotation shaft 40, and is arranged so that the seat piece 60 comes into contact with the rotation of the rotation shaft 40. In addition, a pair of body rims 70, which are formed at different heights and prevent interference due to rotation, are provided.

The pair of body rims 70 provided on the valve body 30 are located on the same line as the pair of blades 50 in a closed state, so that the body rim 70 is welded or formed to the valve body 30 in the work process. The annoyance can be solved.

Further, the pair of blades 50 can perform a perfect opening / closing operation in the valve body 30 over an angle range of 0 ° to 90 °, and the seat piece 60 is not in line contact with the pair of body rims 70 but is a surface. By making contact, the sealing performance can be further improved.

Further, the blade position adjuster 32 is used when the blade 50 is out of the angle range of 0 ° to 90 ° or is not completely sealed, and the blade position adjuster 32 is used to adjust the position of the blade. be able to.

On the other hand, the pair of body rims 70 is a second body rim in which one surface of the seat piece 60 attached to the first blade 50a is in contact with the first body rim 70a and one surface of the seat piece 60 attached to the second blade 50b is in contact. It can be configured with 70b.

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

That is, as shown in FIG. 6, when the first blade 50a is eccentric to the left side with respect to the rotation shaft 40, the first body rim 70a provided on the upper side is attached to the second blade 70b. The protruding length b1 is shortened so that the sheet piece 60 can pass through, so that the second body rim 70b can come into contact with the sheet piece 60 attached to the second blade 70b. In addition, the width b1'is configured to be long.

Similarly, the body rim 70 provided on the lower side may have a protrusion length that is rotationally symmetric with respect to the first and second body rims 70a and 70b with respect to the rotation axis 40.

In other words, a separation space is created between the blade 50 in a state where the sheet piece 60 is not attached and the body rim 70, and the sheet piece 60 is placed on the outer peripheral surface of the blade 50 in the separation space. By being attached along the above, the separated space is filled.

Here, the sheet piece 60 is mounted along the circumference of the blade 50 so that one side overlaps the edge portion, but this may occur through a gap between the respective sheet pieces 60. This is to minimize the outflow of the exhaust gas, enhance the durability by increasing the coupling force with the sheet piece 60, and prevent deformation due to the high-pressure exhaust gas.

The sheet piece 60 can have various shapes such as a circle, a polygon, an ellipse, and a quadrangle, 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 have a trapezoidal shape to be provided.

On the other hand, as a method of attaching the sheet piece 60 to the blade 50, there are methods such as welding, fitting coupling, and bolt fastening, but the sheet piece 60 and the blade 50 at a position corresponding thereto are preferable. The sheet piece 60 can be fastened to the peripheral edge of the blade 50 by a bolt fastening method in which a bolt 96 is inserted into a fastening hole (not shown) provided in the peripheral edge of the blade and fastened together with a nut. It is preferable that the structure is as follows.

In the bolt fastening method, only the sheet piece 60 to be replaced can be easily replaced when the sheet piece 60 needs to be replaced by using the sheet piece 60 for a long time, which not only economically reduces costs but also reduces costs. The ability to reduce replacement time can provide significant maintenance benefits.

Next, a plurality of clips 90 are provided so as to be overlapped and mounted in front of the sheet piece 60 so as to prevent the sheet piece 60 from being deformed by the high-pressure exhaust gas.

In other words, if the sheet piece 60 is continuously exposed to the high temperature and high pressure exhaust gas, deformation may occur, and in order to prevent this, the clip 90 is attached to the sheet piece 60. It is provided so that it can be mounted by stacking it on the front.

The clip 90 has (1) a flat surface portion 90a provided so as to come into contact with one surface of the sheet piece 60 and be connected by bolting to the blade 50, and (2) extend from the flat surface portion 90a. The sheet piece 60 is provided so as to be brought into close contact with the body rim 70 so that the degree of close contact can be further improved, and is composed of a bent portion 90b that is bent at a predetermined angle.

FIG. 7 is an actual photograph showing the shape and detailed configuration of the clip according to the preferred embodiment of the present invention.

As shown in FIG. 7, the shape of the clip 90 includes a flat surface portion 90a that is coupled to the blade together with the bolt 96, and a bent portion 90b that extends from the flat surface portion 90a and is provided in front of the sheet piece 60. Consists of.

As an example, the bent portion 90b can be provided by being bent at a predetermined angle, but is preferably composed of two chevron-shaped surfaces, each of which is 45 with respect to the sheet piece 60. It is preferable that the bent portion 90b is bent so as to form an angle of °, and the edge portion at the tip of the bent portion 90b is provided so as to come into contact with the front surface of the sheet piece 60 by line contact.

In other words, a large number of the clips 90 are provided according to the size and number of the sheet pieces 60, and one clip 90 comes into contact with the one sheet piece 60 to individually attach the sheet pieces 60. It is provided so that it can be brought into close contact.

On the other hand, a support plate 98 is provided on the front surface side of the flat surface portion 90a so that the clip 90 is further closely bonded to the sheet piece 60.

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

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

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

Further, the support plate 98 can be provided so as to prevent the axial movement of the clip 90, and the flat surface portion 90a is brought into close contact with one surface of the sheet piece 60 to create an internal gap. Can be prevented.

Next, an air supply device 80 is provided that supplies air between the pair of blades 50a and 50b to shut off the exhaust gas while the pipeline is closed.

Referring to FIGS. 3 and 4, a high pressure is applied through an air injection portion (not shown) which is penetrated through the valve body 30 and an injection port is arranged in the shielding space S (FIG. 5), and the air injection portion. It includes an air compressor (not shown) that supplies air.

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 to the inside of the shielded space S in a state where the pipeline is closed, but at this time, the pressure is larger than the pressure of the exhaust gas flowing into the inside of the pipeline. It is preferably injected under pressure.

As an example, a high temperature air seal butterfly valve can be used as a valve for a ship's scrubber, and an engine in which exhaust gas emitted from an engine operating in a power generation facility using a large number of engines and one boiler is temporarily stopped. It can be provided to prevent backflow to.

In particular, the airtight state can be maintained without the gasket by removing the skin from the conventional airtight structure due to the close contact between the blade and the gasket and supplying high-pressure air to the shielding space S inside the blade 50. Of course, it can play a role in preventing backflow of exhaust gas.

In other words, at the upper part of the blade 50 with respect to the rotating shaft 40, the air pressure provided by the configuration of the clip 90 and the air supply device 80 is supplied so as to be larger than the pressure of the exhaust gas. Therefore, the exhaust gas is prevented from flowing into the shielded space S, and the high-pressure air supplied from the air supply device 80 is larger than the pressure of the exhaust gas even at the lower part of the blade 50. It is formed and can block the exhaust gas flowing in from the outside.

As described above, in the high temperature air seal butterfly valve according to the present embodiment, the rotary shaft 40 is operated by a driving means such as the hydraulic motor or the pneumatic actuator 42 provided on the outside of the valve body 30. The pair of blades 50a and 50b rotate to open / shut off the flow path in the valve body 30. Next, such an operation will be described.

First, as shown in FIG. 5, when the pair of blades 50a and 50b have an angle (0 °) parallel to the center line in the length direction of the flow path formed in the valve body 30, the flow path. Will be in a completely open state.

The rotation shaft 40 is rotated to one side by the operation of the hydraulic motor or the pneumatic actuator 42, so that the pair of blades 50a and 50b to which the seat pieces 60 provided in large numbers are attached have the length of the flow path. When the flow path reaches an angle (90 °) perpendicular to the center line in the longitudinal direction, the flow path is closed. At this time, the sheet pieces attached to the outer peripheral surfaces of the pair of blades 50a and 50b. The 60 is in contact with the first and second body rims 70a and 70b provided in the valve body 30, respectively, and the shielding space S is formed between the pair of blades 50a and 50b.

Here, since the sheet piece 60 has a structure in which the first and second body rims 70a and 70b are in surface contact with each other to maintain airtightness and friction does not occur with each other, the sheet piece 60 is attached to the outer peripheral surfaces of the pair of blades 50a and 50b. The phenomenon that the sheet piece 60 and the first and second body rims 70a and 70b are worn by friction and resistance is added to the operation of the pair of blades 50a and 50b does not occur.

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

FIG. 8 is a cross-sectional view showing a configuration of an interval adjusting portion provided on the 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 screw thread (not shown) is formed on the inner peripheral surface thereof.

An interval adjusting portion 74 provided with a male screw thread (not shown) is inserted into the hole 72, and the interval adjusting portion 74 is provided on the inner peripheral surface of the hole 72 penetrating the body rim 70. By being fastened by a rotary coupling with the female screw thread, it is provided so that play can be prevented from occurring inside the hole 72.

At this time, one end of the spacing adjusting portion 74 comes into contact with one surface of the sheet piece 60, and the length of the spacing adjusting portion 74 is adjusted to create a separation space between the body rim 70 and the seat piece 60. G is formed and is configured so that the separation space G can be adjusted.

In other words, with the pair of blades 50 closed, the exhaust gas flowing inside contains a large amount of carbon, and the carbon accumulates by continuously contacting one surface of the body rim 70. When the gas is accumulated and the above process is repeated, additional time and effort are required to remove the carbon.

On the other hand, the air supply device 80 discharges high-pressure air to the shield space S, and high-pressure air is also discharged to the separation space G, so that the carbon contained in the exhaust gas is discharged to the body rim 70. It is provided so that it can be prevented from accumulating on one side.

Here, it is preferable that a large number of the interval adjusting portions 74 are provided so as to be uniformly distributed along the inner circumference of the body rim 70.

In such an embodiment, in order to use the air supply device 80, the object to be transferred must be limited to a gas or a gas containing powder, and when the liquid is transferred, the above-mentioned It is preferable not to use the air supply device 80.

Although the embodiments of the present invention have been described above with reference to the accompanying drawings, a person having ordinary knowledge in the technical field to which the present invention belongs can use the present invention without changing its technical idea or essential features. You will understand that it can be implemented in various concrete forms. Therefore, it should be understood that the embodiments described above are exemplary in all respects and are not limiting.

30 Valve body 32 Blade position adjuster 40 Rotating shaft 42 Hydraulic motor or pneumatic actuator 44 Handle 50 Blade 50a 1st blade 50b 2nd blade 60 Seat piece 70 Body rim 70a 1st body rim 70b 2nd body rim 72 hole 74 Spacing adjustment part 80 Air supply device 90 Clip 90a Flat part 90b Bent part 96 Bolt 98 Support plate S Shielding space G Separation space

Claims (5)

The valve body connected to the pipeline and
A rotating shaft in which both ends are coupled in the valve body,
A pair of blades that are coupled to the axis of rotation, placed parallel to each other at regular intervals, and eccentric in opposite directions with respect to the center of the axis of rotation.
A sheet piece composed of a large number of small pieces, mounted on the blade so as to overlap one side along the blade, and attached to the front surface in the rotation direction with respect to the rotation axis.
It is provided on the inner surface of the valve body so as to be arranged with reference to the rotation center line formed by the rotation shaft, and is arranged so that the seat pieces come into contact with each other as the rotation shaft rotates, and the heights differ from each other. A pair of body rims that are formed to prevent interference due to rotation,
An air seal butterfly valve for high temperature, which includes an air supply device that supplies air between the pair of blades to shut off exhaust gas in a state where the pipeline is closed. The high temperature air seal butterfly valve according to claim 1, wherein a plurality of clips are provided so as to be overlapped with each other in front of the sheet piece and to prevent the sheet piece from being deformed by high-pressure exhaust gas. .. The clip is provided with a flat surface portion that comes into contact with one surface of the sheet piece and can be connected by bolting to the blade.
It is provided so as to extend from the flat surface portion and bring the sheet piece into close contact with the body rim to further improve the degree of adhesion, and is composed of a bent portion that is bent at a predetermined angle. The high temperature air seal butterfly valve according to claim 2. The high temperature air seal butterfly valve according to claim 3, further comprising a support plate provided in front of the flat surface portion so that the clip can be further closely attached to the sheet piece. The body rim is provided with a hole penetrating the inside, an interval adjusting portion is inserted into the hole, and a separation space is formed between the body rim and the sheet piece according to the length of the interval adjusting portion. The high temperature air seal butterfly valve according to claim 1.

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