KR200487072Y1 - dome valve having improved air sealing structure - Google Patents

Abstract

A dome valve having an improved air sealing structure according to the present invention comprises: a body of a dome valve having a receiving portion formed therein; A head flange coupled to an upper portion of the main body and having an inlet port communicating with the receiving portion, the air port communicating with an external air supply portion; A hemispherical dome disk positioned in the receiving portion and opened and closed by rotation; A sealing means coupled between the main body and the head flange to close or separate from the dome disc depending on whether air is injected or not; A sealing ring extruded into the sealing means and having an air injection hole for supplying air to the sealing means through the air flow path; And a shaft rotatably installed on both sides of the main body and coupled to the dome disk inwardly, wherein the sealing means includes a lower main body supporting portion supported on the main body in a shape of a side surface and a bottom surface bent in a straight section, An upper head flange support portion supported on the head flange in a shape in which the side surface and the upper surface are bent in a positive section and an inclined extensible portion expanding according to injection of air between the both support portions, And a sealing protrusion is formed on the upper surface of the head flange supporting part so that the sealing protrusion is formed so as to receive the extrapolated sealing, And a projecting engagement portion having an inner inclined surface downward is formed at the center of the lower portion, And the air injection hole is formed between the expansion and contraction portion and the air injection hole in an inner inclined surface of the protrusion engagement portion of the seal which is in contact with the expansion and contraction portion of the sealing means, And an air circulation passage communicating with the air injection hole so that the air injected through the air introduction hole is uniformly injected toward the expansion and contraction portion is further formed, and a scraper formed at one side of the sealing means to have a sharp portion toward the dome disk .
Thereby, it is possible to provide a dome valve having an improved air-sealing structure that can prevent the air-sealing structure from being worn, broken, and leaked.

Description

The present invention relates to a dome valve having improved air sealing structure,

The present invention relates to a dome valve having an improved air-sealing structure, and more particularly to a dome valve having an improved air-sealing structure, and more particularly, a butterfly valve or a butterfly valve for preventing leakage and abrasion in a pneumatic conveying system. To a dome valve having an improved air-sealing structure in a hemispherical dome valve used as a substitute for a cone valve.

The dome valve is used for pressure cutoff when handling products in petrochemical and food fields, steel mills, power plants, garbage incinerators, oil refineries, and so on.

That is, the dome valve is used in a variety of fields such as plastic (ABS, PET, TPA, PE, PP), chemical products (toner, carbon black, PVC), food materials (coffee, milk powder, cocoa, , Industrial materials (silica, pelite, coal, cement, wood chips, etc.), handling scales containing iron, powder, dirt, and water in steel mills, ash, bottom ash, sand, coke breeze, and fly ash containing various gases in an oil refinery, it is necessary to apply pressure As shown in FIG.

The prior art of such a dome valve is disclosed in Korean Registered Utility Model No. 20-0204010 in a sludge discharge device using air pressure.

In the conventional dome valve, air is supplied to the air sealing so that the dome disk is shut off due to close contact with the dome disk, and the dome disk is closed. When air supplied to the air sealing is blocked, the air sealing shrinks, So that the dome disk is opened.

However, since the dome valve according to the related art is provided with a structure in which the air supplied through the air sealing is locally concentrated, abrasion or deformation may easily occur, thereby causing a leakage of the conveyance object.

In addition, when the dome disk is opened due to the rotation of the dome disk, fine particles such as dust or debris left on the surface of the dome disk are rotated together on the surface of the dome disk and interrupted between the dome disk and the air seal. So that there is a problem that the air sealing may be broken or the service life may be shortened.

Korean Utility Model Registration No. 20-0204010 (registered on September 8, 2000)

It is an object of the present invention to provide a dome valve having an air-sealing structure which is improved to prevent wear, breakage and leakage of the air-sealing structure.

It is another object of the present invention to provide a dome valve having an improved air sealing structure capable of preventing the air sealing structure from being damaged by fine particles or the like when the dome disk is opened by rotation of the dome disk, have.

According to an aspect of the present invention, there is provided a dome valve having an improved air sealing structure, comprising: a main body of a dome valve having a receiving portion formed therein; A head flange coupled to an upper portion of the main body and having an inlet port communicating with the receiving portion, the air port communicating with an external air supply portion; A hemispherical dome disk positioned in the receiving portion and opened and closed by rotation; A sealing means coupled between the main body and the head flange to close or separate from the dome disc depending on whether air is injected or not; A sealing ring extruded into the sealing means and having an air injection hole for supplying air to the sealing means through the air flow path; And a shaft rotatably installed on both sides of the main body and coupled to the dome disk inwardly, wherein the sealing means includes a lower main body supporting portion supported on the main body in a shape of a side surface and a bottom surface bent in a straight section, An upper head flange support portion supported on the head flange in a shape in which the side surface and the upper surface are bent in a positive section and an inclined extensible portion expanding according to injection of air between the both support portions, And a sealing protrusion is formed on the upper surface of the head flange supporting part so as to receive an extrapolated sealing, and the sealing part is provided on the upper part of the mounting part, And a projecting engagement portion having an inner inclined surface downward is formed at the center of the lower portion, And the air injection hole is formed between the expansion and contraction portion and the air injection hole in an inner inclined surface of the protrusion engagement portion of the seal which is in contact with the expansion and contraction portion of the sealing means, And an air circulation passage communicating with the air injection hole so that the air injected through the air introduction hole is uniformly injected toward the expansion and contraction portion is further formed, and a scraper formed at one side of the sealing means to have a sharp portion toward the dome disk .

Here, the scraper is preferably formed integrally with the sealing means.

The scraper is preferably made of cemented carbide.

It is preferable that either one of the shafts is coupled to the actuator by coupling with a coupling.

The actuator is preferably operated using compressed air supplied from the air supply unit.

According to the present invention, it is possible to provide a dome valve having an improved air-sealing structure that can prevent the air-sealing structure from being worn, broken, and leaking.

Also, it is possible to provide a dome valve having an improved air sealing structure that can prevent the air sealing structure from being damaged by fine particles or the like when the dome disk is opened by rotation of the dome disk, thereby extending the service life.

FIG. 1 is a perspective view showing the appearance of a dome valve having an improved air-sealing structure according to the present invention,
2 is a front section view of the dome valve with the improved air-sealing structure of FIG. 1,
FIG. 3 is an enlarged view of a portion 'A' of FIG. 2,
Fig. 4 is an exploded perspective view of the sealing means and sealing of Figs. 2 and 3,
5 is a control block diagram of a dome valve having an improved air-
6 is a front section view of a dome valve with an improved air-sealing structure according to another embodiment of the present invention,
Figure 7 illustrates another embodiment of Figure 3,
8 is a side cross-sectional view of the scraper of Fig.

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

1 and 2, a dome valve having an improved air sealing structure according to the present invention includes a main body 100 of a dome valve having a receiving portion 101 formed therein, A head flange 200 coupled to the receiving portion 101 and formed with an inlet 201 communicating with the receiving portion 101 and formed with an air flow path 210 communicating with an external air supplying portion 70; A dome-shaped dome disk 300 which is opened and closed by rotation and a sealing means which is coupled between the main body 100 and the head flange 200 and which is in close contact with or spaced from the dome disk 300 A seal 500 which is extrinsic to the sealing means 400 and communicates with the air passage 210 to form an air injection hole 510 for supplying air to the sealing means 400; And a shaft 600 to which the dome disk 300 is coupled inward.

2, the main body 100 of the dome valve is formed with a receiving portion 101 therein and a head flange 200 having an inlet 201 formed at an upper portion thereof is coupled to the receiving portion 101 And the inlet 201 are communicated with each other.

A shaft 600 is rotatably installed on both sides of the main body 100 and a hemispherical dome disk 300 is coupled to the shaft 600 to be positioned in the receiving portion 101. At this time, a bush 640 is inserted between the shaft 600 and the dome disk 300.

One shaft 600 of the two shafts 600 is coupled to the actuator 10 by a coupling 610 and the other shaft 600 is covered with a cover 630.

At this time, the flange 620 is inserted into the connection portion of the coupling 610 and the actuator 10 for reinforcement of the coupling 610.

The head flange 200 is formed with an air flow path 210 connected to the external air supply unit 70 through the second solenoid valve 40.

2 and 3, between the inclined lower portion of the head flange 200 and the inclined upper portion of the main body 100, when the dome disk 300 is closed, the head flange 200 and the main body 100 The sealing means 400 and the sealing means 500 are provided to the sealing means 400 in order to maintain the airtightness with the sealing means 400 and the sealing means 400.

An air injection hole 510 is formed in the ceiling 500 to communicate with the air flow path 210 formed in the head flange 200 and receive air from the external air supply part 70.

3, when the air is injected into the air injection hole 510, the air is injected into the dome disc 300 (see FIG. 3) So as to maintain airtightness.

The actuator 10 operates using compressed air supplied from an external air supply unit 70 connected through the first solenoid valve 30, as shown in Fig.

The first and second solenoid valves 30 and 40 are opened and closed under the control of a sequencer 20 that controls the output in accordance with the pre-programmed order according to the condition of the input and thus the actuator 10 operates Air is supplied to the sealing means (400).

Here, the solenoid valve is a three-way valve. When the first solenoid valve 30 is turned on, the actuator 10 is operated to open the dome disk 300, And the second solenoid valve 40 is turned on by supplying air to the sealing means 400 when the second solenoid valve 40 is turned on, The air supplied to the sealing means 400 is exhausted.

Meanwhile, the first and second regulators 50 and 60 regulate the air pressure.

The sealing means 400 according to the present invention is made of elastic material having a wide annular shape in the lower part and a narrow annular shape in the upper part.

3 and 4, the sealing means 400 includes a lower body support 410 supported by the main body 100, and a top head flange (not shown) for supporting the head flange 200. [ A supporting part 420 and an inclined extensible part 430 which expands according to the injection of air between the supporting parts 410 and 420.

The main body supporting part 410 has a bottom surface and a bottom surface of the sealing means 400 are supported by the main body 100 in the shape of a curved side surface and a bottom surface when seen from the front end face and the head flange supporting part 420 has, The upper surface and the upper surface of the sealing means 400 support the head flange 200 in a bent shape.

The main body supporting portion 410 is formed with a protrusion 411 upward from the lower surface thereof to form a mounting groove 413 in which the sealing ring 500 is seated and fitted together with the expanding and contracting portion 430. The head flange supporting portion 420 And a latching protrusion 421 is formed laterally from the upper surface of the main body 500 so that the extruded sealing 500 is caught.

3 and 4, the upper part of the ceiling 500 is a circular plate 520, and at the center of the lower part, a protruding locking part 530 having an inner inclined surface 531 downward is formed, as shown in FIGS. 3 and 4, The air injection hole 510 is formed in the upper circular plate 520 of the seal 500 and is inclined toward the inner inclined surface 531 of the protruding engagement portion 530. An air circulating flow path 533 are preferably formed.

3, the air circulation passage 533 is formed in the inner inclined surface 531 of the protruding engagement portion 530 of the seal 500 contacting the elastic member 430 of the sealing means 400, The air injected through the air injecting hole 510 is communicated to the air injecting hole 510 so that air injected through the air injecting hole 510 is uniformly injected toward the expanding and contracting portion 430, ).

Accordingly, the air supplied through the air circulating passage 533 to the air sealing structure such as the sealing means 400 or the dome disk 300 is distributed in a uniformly distributed manner without being locally concentrated, whereby the air sealing structure is worn It is possible to prevent deformation, breakage and leakage, and furthermore, it is possible to prevent the object to be conveyed from leaking from the dome valve.

A plurality of air injection holes 510 formed in the circular plate 520 are inclined and extended to an annular air circulation passage 533.

When the seal 500 is extruded from the sealing means 400 by the sealing means 400 and the seal 500, the portion of the protruding latching portion 530 under the seal 500 is inserted into the sealing means 400 A part of the upper original plate 520 of the sealing ring 500 is caught by the latching protrusion 421 and is not released.

At this time, a space is formed between the air circulation passage 533 formed in the ceiling 500 and the expandable and contractible portion 430, and this space becomes a flow passage through which the air flows when the air is injected through the air injection hole 510.

The main body supporting portion 410 under the sealing means 400 is supported by the main body 100 in a state where the sealing means 400 and the ceiling 500 are assembled between the main body 100 and the head flange 200, The head flange supporting part 420 is supported by the head flange 200 and expanded when the air is injected so that the expansion and contraction part 430 which is in close contact with the dome disk 300 is not supported but exposed, There is no worry of leaving.

3, a scraper 700 is provided at one side of the sealing means 400 according to the present invention and is formed to have a portion sloping in a tangential direction toward the surface of the dome disk 300 .

As a result, fine particles such as dust and debris left on the surface of the dome disk 300 when the dome disk 300 rotates can be effectively removed by the scraper 700, It is possible to prevent the air sealing structure from being damaged by fine particles or the like when the dome disc 300 is opened, thereby extending the service life of the dome valve.

As one embodiment of the present invention, it is preferable that the scraper 700 is formed integrally with the sealing means 400.

Accordingly, the manufacturing of the scraper 700 according to the present invention is simplified, and the process of installing the scraper 700 inside the dome valve can be made much easier.

Meanwhile, the scraper 700 according to the present invention is preferably made of a cemented carbide material.

Accordingly, it is possible to further improve the effect of removing fine particles and the like by the scraper 700 while minimizing wear of the scraper 700.

The operation of the dome valve having the improved air-sealing structure according to the present invention will now be described with reference to FIGS. 1 to 5. FIG.

First, the sequencer 20 turns off the second solenoid valve 40 to exhaust the air supplied to the sealing means 400, and after a predetermined time (for example, about 3 seconds) has elapsed, The valve 30 is turned on to actuate the actuator 10. [

When the actuator 10 is operated, the shaft 600 coupled to the actuator 10 through the coupling 610 rotates and the dome disk 300 coupled to the shaft 600 is rotated and opened.

At this time, the dome disc 300 is rotated without being contacted between the dome disc 300 and the stretchable and shrinkable portion 430 of the sealing means 400 because the air is escaped from the sealing means 400.

When a dome disk 300 is completely opened in a limit switch (not shown) provided in the actuator 10, a transfer object (for example, a product containing sand, coke, ashes, various gases, etc.) , The sequencer 20 turns off the first solenoid valve 30 and actuates the actuator 10 when the injection is completed.

When the actuator 10 is operated, the shaft 600 coupled to the actuator 10 by the coupling 610 rotates and the dome disk 300 coupled to the shaft 600 is rotated and closed.

At this time, the dome disc 300 is rotated without being contacted between the dome disc 300 and the stretchable and shrinkable portion 430 of the sealing means 400 because the air is escaped from the sealing means 400.

After confirming that the dome disk 300 is completely closed by the limit switch provided in the actuator 10 after the dome disk 300 has elapsed for a predetermined period of time (for example, about two seconds), the sequencer 20 moves the second solenoid The valve 40 is turned on to supply the air supplied from the air supply unit 70 to the sealing means 400 through the air flow path 210 of the head flange 200 and the air injection hole 510 of the sealing 500, Respectively.

Since the sealing member 400 is sealed between the sealing member 400 and the sealing member 500 except for the air injection hole 510, the sealing member 500 is formed between the annular air blowing passage 533 formed in the sealing member 500 and the elastic member 430 Air flow path is formed and the air pressure increases.

Since the lower portion and the upper portion of the sealing means 400 are supported by the main body 100 and the head flange 200, they expand only slightly, and most of the air pressure is exerted only on the exposed and contracted portion 430, So that the dome disc 300 is closely contacted with the separated dome disc 300, thereby maintaining airtightness.

The transported object is discharged in a state in which airtightness is maintained in the dome disk 300 and the sealing means 400. After the discharge is completed, the transported object is returned to the initial stage.

Since the dome disk 300 is opened and closed in a state in which the dome disk 300 and the sealing means 400 are kept at a constant interval, there is no wear of the dome disk 300 and the sealing means 400, Air is injected into the sealing means 400 so that the space between the dome disk 300 and the sealing means 400 is expanded by the sealing means 400 and the circumference of the dome disk 300 is covered, Can be prevented.

When the air injected into the sealing means 400 is exhausted by the second solenoid valve 40 having three sides, air is sucked into the sealing means 400 and the sealing means 400, which has been inflated, is retracted, The dome disc 300 can be opened and closed without interference and the damage can be prevented.

Since the sealing means 400 is firmly supported on the main body 100 and the head flange 200, even if air is injected into the sealing means 400 in the state that the dome disc 300 is opened, It does not.

6, the head flange 200 is connected to a gas supply unit 80 for supplying a gas such as nitrogen (N ₂ ) from the outside to the gas supply unit 80, The gas flow path 220 may be formed to surround the sealing means 400 and provide a path for the gas to be injected toward the dome disk 300.

Accordingly, a gas shower is sprayed onto the surface of the dome disk 300 through the gas flow path 220 immediately before the dome disk 300 is completely closed, thereby performing a nitrogen shower so that a gas curtain is formed It is possible to prevent re-inflow of the waste air to be discharged and prevent fine particles or the like from being adsorbed on the dome disk 300.

7 and 8, a spring member 800 is interposed between the scraper 700 and the head flange 200 and the scraper 700 is fixed to the head flange 200. [ The scraper 700 may be provided to be separated from the dome disc 200 by the resilient restoring force of the spring member 800 so that the scraper 700 is pressed against the dome disc 300 side. 8, the scraper 700 is formed in a substantially annular ring shape, and a blade portion is formed so as to protrude sharply from the inner circumferential surface to the lower one side. As shown in Figs. 7 and 8, The gas circulation passage 701 communicating with the gas flow channel 220 is formed by two straight lines that are horizontally and horizontally downward from the outer circumferential surface to the inner circumferential surface of the scraper 700, 700 may have a spring mounting groove 705 on which a spring member 800 is mounted.

The nitrogen gas supplied through the gas passage 220 is injected through the gas circulation passage 701 to form an air curtain on the surface of the dome disk 300 by air purge, And the scraper 700 is always brought into close contact with the dome disk 300 by the pressing of the spring member 800 so that the removal of fine particles and the like can be performed more effectively have.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention as defined by the appended claims. It is natural.

100: main body 101: accommodating portion
200: head flange 201: inlet
210: Air flow path 300: Dome disk
400: sealing means 410: body support
411: projection 413: mounting groove
420: head flange supporting portion 421: latching projection
430: stretching part 500: sealing
510: Air injection hole 520: Disc
530: protruding locking portion 531: inner inclined surface
533: Air circulating flow passage 600: Shaft
610: coupling 700: scraper

Claims (5)

A body of a dome valve having a receiving portion formed therein;
A head flange coupled to an upper portion of the main body and having an inlet port communicating with the receiving portion, the air port communicating with an external air supply portion;
A hemispherical dome disk positioned in the receiving portion and opened and closed by rotation;
A sealing means coupled between the main body and the head flange to close or separate from the dome disc depending on whether air is injected or not;
A sealing ring extruded into the sealing means and having an air injection hole for supplying air to the sealing means through the air flow path; And
And a shaft rotatably shafted on both sides of the main body and coupled to the dome disk inwardly,
The hermetically closing means includes a lower main body supporting portion supported on the main body in a shape of a curved side face and a bottom face in a front end face, a top head flange supporting portion supported on the head flange in a side and upper face- And an inclined extensible portion which expands according to the injection of air between the both supporting portions,
Wherein the main body supporting part is formed with a protrusion from the lower surface to the upper side to form a mounting groove in which the sealing ring is seated together with the expanding and contracting part and the head flange supporting part is provided with a latching protrusion laterally from the upper surface,
The sealing is formed with a protruding engagement portion having a disc at the top and an inner inclined surface at the center in the lower portion. The air injection hole is formed in the disc and is inclined toward the inner inclined surface of the protruding engagement portion.
And an air introducing hole communicating with the air introducing hole so that air injected through the air injecting hole is injected uniformly toward the expanding and contracting portion between the expanding portion and the air injecting hole is formed on an inner inclined surface of the projecting engagement portion of the seal, And an air circulation flow path having an expanded space is further formed,
A scraper formed at one side of the sealing means to have a sharp portion toward the dome disk,
The head flange further includes a gas flow path connected to a gas supply part for supplying a gas such as nitrogen from the outside, the gas supplied from the gas supply part surrounds the sealing part and provides a path for flowing to be sprayed toward the dome disk And,
Characterized in that the scraper is provided in an annular ring shape and is provided with a gas circulation passage communicating with the gas flow path by two straight lines horizontally and obliquely downward from the outer circumferential surface to the inner circumferential surface, The dome valve has.



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