KR200346861Y1 - Dome valve - Google Patents

Abstract

The present invention relates to a dome valve, and more particularly, to a hemispherical dome valve used to prevent leakage and abrasion in a pneumatic conveying system.

The dome valve according to the present invention has a head flange having a main body of the dome valve formed therein, the inlet is coupled to the upper portion of the main body and communicated with the receiving portion is formed up and down and an air passage communicating with an external air supply device And a hemispherical dome positioned in the receiving portion and opened and closed by rotation, a sealing member coupled between the main body and the head flange and closely contacted or spaced from the dome according to the presence or absence of air injection, and extrapolated to the sealing member. And a seal having an air injection hole for supplying air to the sealing means through an air passage, and a shaft rotatably inserted on both sides of the main body and coupled with a dome inward.

Description

Dome valve

The present invention relates to a dome valve, and more particularly, as a substitute for a butterfly valve or a cone valve to prevent leakage and abrasion in a pneumatic conveying system. To a hemispherical dome valve.

Dome valves are used for pressure isolation when handling products in the petrochemical and food sectors, steel mills, power plants and waste incinerators, and refineries.

That is, the dome valve, plastics (ABS, PET, TPA, PE, PP, etc.), chemical products (toner, carbon black, PVC), food materials (coffee, powdered milk, cocoa, sugar, etc.) in the petrochemical and food fields ), Handles industrial materials (silica, pelite, coal, cement, wood chips, etc.), handles scales containing iron powder, iron powder and debris and water in steel mills, and (fly ash, bottom ash)), sand, coke coke breeze (hand ash), and when handling a fly ash containing various gases in the refinery to transfer the above products by air pressure Used to shut off pressure in the system.

A conventional technique of such a dome valve is disclosed in a sludge discharge device using air pressure in Korean Utility Model Model No. 20-0204010.

5A and 5B, the disclosed utility model includes a sludge inlet 201 into which various solidified sludges are introduced, and a dome formed under the sludge inlet 201 and opened and closed by a cylinder 220. In order to maintain closeness between the valve 202, the head flange 203 formed on the outer circumference of the dome valve 202, and the dome valve 202 and the head flange 203, Air injection grooves 240 and 241 are formed, respectively, the packing 204 having the protrusion 242 integrally formed on the outer circumferential surface thereof, and the main air inflow to the upper side of the outer circumferential surface formed at a lower portion of the dome valve 202. It is formed inside the body 205 and the body 205, the valve 250 is formed is fixed by the inner surface of the body 205 and a plurality of supports 260, the outer peripheral surface Multiple auxiliary air inlet valves 261 are formed On one side of the circular pipe 206 through the nozzle 251 of the main air inlet valve 250 and the inner side of the circular pipe 206, the auxiliary air of the circular pipe 206 The nozzle 610 of the inlet valve 261 is penetrated and the conical sludge storage hopper 207 is formed on the inner surface through which the nozzle 610 is penetrated, and the sludge storage hopper ( 207) is configured to combine the discharge port 208 is discharged sludge in the lower portion.

The dome valve 202 is open when the sludge is introduced into the sludge storage hopper 207 through the sludge inlet 201, and when the air is injected to discharge the sludge introduced into the sludge storage hopper, the injected air is discharged to the outside. It is closed to prevent leakage.

In addition, air supplied from the air inlet valve 250 is instantaneously supplied to the air injection groove 240 formed in the lower center of the packing 204, and at the same time, the air injection groove 241 formed at the side of the packing is expanded. Air is supplied and expanded simultaneously with the operation of the air inlet valve 250 through the air inlet passage 209 formed in the head flange 203.

As a result, airtightness can be maintained, and after the sludge is discharged, the air injected into the air injection grooves 240 and 241 formed in the packing 204 when the dome valve 202 is rotated and the sludge is injected from the sludge inlet 201. Naturally spills and contracts.

However, in the conventional utility model, since the packing 204 is supported by the head flange 203 only by the protrusion 242 formed on the outer circumferential upper surface, when the air is injected while the dome valve 202 is opened due to a malfunction, the problem is easily detached. have.

In addition, since the dome valve 203 rotates and opens in a state of always being in contact with the packing 204 for sealing, the contact surface of the packing contacting the dome valve wears down as the dome valve is repeatedly opened and closed, thereby Due to the air is leaked to the outside, the sludge storage hopper 207 inside the high pressure of the air pressure can not be maintained because the feed rate was bound to fall.

To prevent this, there was a hassle that had to be replaced every time the packing was worn out.

In addition, since the air injection grooves 240 and 241 are integrally formed in the packing itself, when the air is injected through the air injection grooves, the packing expands extremely small and airtightness is deteriorated.

The present invention has been made to solve the above-mentioned problems, the object of the present invention is to combine the sealing means provided with a sealing means provided to maintain the seal between the dome and the body and the head flange, the air injection hole in the seal When the opening and closing operation of the dome does not supply air, the sealing means and the dome are spaced apart, and there is no abrasion. The present invention provides a dome valve that is firmly supported by the main body and does not detach.

Another object of the present invention is to provide an actuator coupled to a shaft of the dome valve and an outer shaft of the dome valve, and the actuator can be opened and closed automatically by causing the actuator to be operated in conjunction with the air supply under the control of a sequencer. To provide a convenient dome valve.

In order to achieve the above object, the present invention, the main body of the dome valve formed therein; A head flange coupled to an upper portion of the main body and configured to have an inlet formed up and down and communicating with an external air supply device; A hemispherical dome positioned in the accommodation portion and opened and closed by rotation; A sealing member coupled between the main body and the head flange to be in close contact with or spaced apart from the dome depending on whether air is injected; A seal which is extrapolated to the sealing member and has an air injection hole for supplying air to the sealing means through an air passage; And it is to provide a dome valve including a shaft rotatably inserted on both sides of the body and the dome is coupled to the inside.

1 is a front sectional view of a dome valve according to the present invention.

2 is an exploded perspective view of the sealing means and the seal shown in FIG.

3 is a partial cross-sectional view in the state assembled by FIG.

4A and 4B are sequence diagrams and flowcharts for explaining the operation of the dome valve according to the present invention.

5A and 5B are front and partial cross-sectional views of a sludge discharge apparatus using conventional air pressure.

<Description of the symbols for the main parts of the drawings>

10: main body 20: head flange

30: dome 40: sealing means

50: sealing 60a, 60b: shaft

70: flange 80: cover

90 bush 100 coupling

110: actuator 120: sequencer

130a, 130b: Solenoid Valve 140a, 140b: Regulator

150: air supply unit

Hereinafter, the configuration and operation of the embodiments of the present invention will be described with reference to the accompanying drawings.

1 is a front sectional view of a dome valve according to the present invention.

Figure 4a is a sequence diagram for explaining the operation of the dome valve according to the present invention.

As shown, the head flange 20 having the inlet 22 formed up and down is coupled to the upper portion of the dome valve body 10 having the receiving unit 12 formed therein so that the receiving unit 12 and the inlet 22 are Communicating.

The head flange 20 is formed with an air passage 24 connected to the external air supply device 150 and the second solenoid valve 130b.

Shafts 60a and 60b are pivotally rotatable on both sides of the main body 10, and a hemispherical dome 30 is coupled to the shaft inwardly and is located in the receiving part 12.

At this time, the bush 90 is fitted between the shaft 60a, 60b and the dome 30.

Between the inclined lower portion of the head flange 20 and the inclined upper portion of the main body 10 is provided with a sealing means 40 and the sealing means to maintain airtightness with the head flange and the main body when the dome 30 is closed. An extrapolated seal 50 is provided.

An air injection hole 52 is formed in the seal 50 to communicate with an air passage 24 formed in the head flange 20 to receive air from an external air supply device 150.

The sealing means 40 is normally spaced apart from the dome 30, and when air is injected into the air injection hole 52, it expands by air pressure to be in close contact with the dome 30 to maintain airtightness.

The shaft 60a on one side of the shafts on both sides is covered with a cover 80, and the shaft 60b on the other side is axially coupled by the coupling 100 and connected to the actuator 110.

At this time, the flange 70 is inserted into the connection portion of the coupling and the actuator 110 to reinforce the coupling 100.

The actuator 110 operates by using compressed air supplied from an external air supply device 150 connected through the first solenoid valve 130a.

The first and second solenoid valves 130a and 130b are opened and closed by the control of the sequencer 120, which controls the output in a pre-programmed order according to the conditions of the input, and the actuator 110 is operated accordingly. Or supply air to the sealing means 40.

Here, the solenoid valve is a three-way valve, and the first solenoid valve 130a operates the actuator 110 to open the dome 30 when it is turned on and closes the dome when it is turned off. It is assumed that the second solenoid valve 130b supplies air to the sealing means when it is on and exhausts the air supplied to the sealing means when it is off.

Not shown 140a, 140b is a regulator for adjusting the air pressure.

2 is an exploded perspective view of the sealing means and the seal shown in FIG.

3 is a partial cross-sectional view in the state assembled by FIG.

As shown, the sealing means 40 is made of an elastic material, and the lower part forms a wide annular shape and the upper part forms a narrow annular shape.

The sealing means 40 has air between the lower body support part 42 supported by the main body 10, the upper head flange support 44 supported by the head flange 20, and the support parts 42 and 44. It consists of an inclined stretchable portion 46 is expanded upon the injection of.

The main body support part 42 has a lower side and a lower side of the sealing means 40 supported by the main body 10 in a shape in which the side and the lower surface are bent from the front end face, and the head flange support 44 is the side view seen from the front end face. The upper and upper surfaces of the sealing means are supported by the head flange 20 in a bent and upper surface.

The body support 42 has a projection 43 formed from the lower surface to the upper side to form a mounting groove 48 in which the seal 50 is fitted to the outside with the elastic portion 46 to be seated, and the head flange support 44 The locking projection 45 is formed laterally from the upper surface.

The upper portion of the seal 50 is the disc 54 and the protrusion 56 is formed in the center of the lower portion, the groove 58 is formed in the inner side.

The plurality of air injection holes 52 formed in the disc 54 are obliquely drilled to extend to the annular groove 58.

When the sealing is extrapolated to the sealing means by the configuration of the sealing means 40 and the sealing 50, the projection 56 of the lower part of the sealing is mounted in the mounting groove 48 of the sealing means, and the upper disc of the sealing ( A part of 54 is caught by the catching protrusion 45 so as not to be separated.

In this case, a space is formed between the groove 58 and the stretchable portion 46 formed in the seal 50, and when the air is injected through the air injection hole 52, the air flows through the air.

In FIG. 1, in the state in which the sealing means 40 and the sealing 50 are assembled between the main body 10 and the head flange 20, the main body support portion 42 of the lower sealing means 40 is attached to the main body 10. The upper head flange support portion 44 is supported by the head flange 20, the expansion means when the air is injected is not exposed only the expansion and contraction portion 46 that is in close contact with the dome, so that the sealing means 40 is separated There is no concern.

4A and 4B are sequence diagrams and flowcharts for explaining the operation of the dome valve according to the present invention.

First, the sequencer 120 turns on the second solenoid valve 130b to exhaust the air supplied to the sealing means (S402), and after a predetermined time (for example, 3 seconds) elapses, the first solenoid valve 103a is opened. On to operate the actuator 110 (S404).

When the actuator 110 is operated, the shafts 60a and 60b axially coupled to the actuator by the coupling 100 rotate, and the dome 30 coupled to the shaft is also rotated to be opened (S406).

At this time, since the air has escaped to the sealing means 40, the dome 30 is spaced apart from the contact between the dome 30 and the expansion and contraction part 46 of the sealing means so that the dome 30 rotates.

When the dome is completely opened in the limit switch (not shown) provided in the actuator (S408), the contents (sand, coke, ash, products containing various gases) are added (S410), and then the sequencer is completed. In operation S412, the first solenoid valve is turned off to operate the actuator.

When the actuator 110 is operated, the shafts 60a and 60b axially coupled to the actuator by the coupling 100 rotate and the dome 30 coupled to the shaft is also rotated and closed (S414).

At this time, since the air has escaped to the sealing means 40, the dome 30 is spaced apart without contact between the dome 30 and the expansion and contraction part 46 of the sealing means so that the dome 30 rotates.

After the dome is closed and a predetermined time (for example, 2 seconds) has elapsed, and if the dome is completely closed at the limit switch (not shown) provided in the actuator (S416), the sequencer 120 is the second solenoid valve 130b. Off) to supply the air supplied from the air supply device 150 to the sealing means 40 through the air inlet 22 of the head flange 20 and the air injection hole 52 of the sealing 50 ( S418).

At this time, except the air injection hole 52 is sealed between the sealing means 40 and the sealing 50, so the flow path of air between the annular groove 58 and the elastic portion 46 formed in the sealing 50 Is formed to increase the air pressure.

In addition, since the lower portion and the upper portion of the sealing means 40 are supported by the main body 10 and the head flange 20, the expansion and contraction portion 46 is affected by the expansion and contraction portion 46, which is only slightly expanded and most of the air pressure is exposed. Is in close contact with the dome 30 spaced apart, thereby maintaining airtightness.

The contents are discharged while the airtightness is maintained in the dome and the sealing means (S420), and after the discharge is completed, the process returns to the first stage.

As such, the dome 30 is opened and closed in a state where the dome 30 and the sealing means 40 maintain a constant interval, so that there is no wear of the dome and the sealing means, and when the dome is closed, air is injected into the sealing means to As the sealing means expands and eliminates the gap between the sealing means and surrounds the circumference of the dome, leakage can be prevented.

When the air injected into the sealing means is exhausted by the second solenoid valve 130b which is a three-way valve, the sealing means which is expanded while the air is drawn out of the sealing means 40 is contracted, and thus a constant distance is formed between the dome and the sealing means without interference. The dome can be opened and closed and damage can be prevented.

In addition, since the sealing means 40 is firmly supported by the main body 10 and the head flange 20, even if air is injected into the sealing means while the dome 30 is open, the sealing means is not separated.

As described above, according to the present invention, a seal is coupled to a sealing means provided to maintain a seal between the dome, the main body, and the head flange, and an air injection hole is formed in the seal to open and close the air during the opening and closing operation of the dome. Since the sealing means and the dome are separated from each other and there is no abrasion, in the closed state, the sealing means expands and closes to each other by the injected air pressure to keep the airtightness, and the sealing means is firmly supported by the head flange and the main body so that it cannot be separated. Do not.

In addition, an actuator coupled to the shaft of the dome valve and the shaft of the dome valve is provided outside the dome valve, and the dome valve can be automatically opened and closed by allowing the actuator to be operated in conjunction with the air supply under the control of the sequencer.

Claims (7)

A main body of the dome valve having a receiving portion formed therein; A head flange coupled to an upper portion of the main body and configured to have an inlet formed up and down and communicating with an external air supply device; A hemispherical dome positioned in the accommodation portion and opened and closed by rotation; A sealing member coupled between the main body and the head flange to be in close contact with or spaced apart from the dome depending on whether air is injected; A seal which is extrapolated to the sealing member and has an air injection hole for supplying air to the sealing means through an air passage; And Dome valve including a shaft rotatably inserted on both sides of the main body and the dome is coupled to the inside. The method according to claim 1, The sealing member, The lower main body support part that is supported by the main body in a bent shape when the side and the lower surface is bent from the front end, and the upper head flange support part which is supported by the head flange in a bent shape when the side and the upper surface are bent from the front end, between the two support parts Dome valve, characterized in that consisting of the inclined expansion and contraction portion is expanded in accordance with the injection of air. The method of claim 2, wherein the main body support portion is formed with a projection from the lower surface to the upper side is a mounting groove in which the seal is seated to the outside with the expansion and contraction portion, the head flange support portion is formed with a locking projection from the upper surface to the side to the extrapolated seal Dome valve characterized by the locking. The method according to claim 3, The sealing is, The upper part is a disc and a protrusion is formed at the center of the lower part, and a groove is formed inwardly between the disc and the protrusion. The dome valve according to claim 4, wherein the air injection hole is drilled in the disc and formed to be inclined to extend to the groove. The dome valve according to claim 1, wherein the shaft on one side is connected to an actuator by being shaft-coupled by a coupling. The dome valve of claim 6, wherein the actuator operates by using compressed air supplied from an air supply device.