KR200292605Y1 - Both sided resisting pressurecorrosion protection valve - Google Patents

Abstract

The present invention relates to a positive pressure anticorrosive valve, and its object is to provide a positive pressure anticorrosive valve capable of receiving both forward and reverse pressure as well as improving adhesion of the disk by coating the valve body with synthetic resin. In the valve comprising a valve body, a disk that is supported on both sides rotatably inside the valve body, opening and closing the through hole, and a drive shaft for rotating the disk, the valve body is coated with a synthetic resin to the inner peripheral surface and both ends of the flange surface However, a sheet portion is formed on the surface where the disk is in contact, and the disk is in direct contact with the sheet portion.

Description

Positive pressure regulating valve {BOTH SIDED RESISTING PRESSURE / CORROSION PROTECTION VALVE}

The present invention relates to a valve, and more particularly, to a positive pressure and anti-corrosive valve that is coated with a synthetic resin on the inner peripheral surface of the valve body to prevent corrosion in advance and to improve the adhesion to the disk.

As is generally known, a valve (in one embodiment, a butterfly valve) is used to block the flow of fluid by rotating a drive shaft with a disk in the center to open and close a pipeline.

Conventional butterfly valves secure the body seat to the cylindrical valve body inner circumference, accumulate the disk through the main shaft on the valve body, secure the disk seat to the outer circumference of the disk, and It is to install a gearbox for disk operation on the outside side.

1 is a view showing a contact state of the valve body and the disk of the valve according to the prior art.

As shown in the figure, the body seat 2 is fixed to the valve body 1, and the disk seat 4 is fixed to the end of the disk 3 by the fixing plate 5 and the fastening bolt 6, so that the body seat 2 ), The disk sheet 4 is folded to close or open the through hole.

However, the disk sheet 4 is made of a rubber material, wear is generated, coupled with the fastening bolts 6 to the disk 3 is likely to be separated, there is a problem that the durability and deterioration due to deterioration and curing.

In addition, the body sheet 2 is inclined to one side, and the inclined surface and the disk sheet 4 are in close contact in the normal hydraulic direction (arrow "A"), but the inclined surface and the inclined surface in the reverse hydraulic direction (arrow "B"). The adhesive force with the disk sheet 4 falls, and water leaks generate | occur | produce.

In addition, there is a high possibility that the packing may be damaged when the flange surface 7 is joined using a separate leakage preventing packing (not shown).

In addition, the coating body is peeled off after a predetermined time the valve body (1), the coating treatment has a problem that corrosion and rust occurs.

The present invention was made to solve such a conventional problem, and its purpose is to coat with synthetic resin material to prevent corrosion of the valve body surface, thereby improving the adhesion of the disc and positive and negative pressure valves that can receive both forward and reverse pressure. In providing.

1 is a cross-sectional view showing a contact state of the valve body and the disk of the valve according to the prior art.

2 is a cross-sectional view of a positive pressure and anti-corrosion valve according to the present invention, showing a closed state of the passage.

3 is a cross-sectional view of a positive pressure and anti-corrosion valve according to the present invention, showing a state in which the passage is opened.

4 is an enlarged view of provisional view of FIG.

Figure 5 is an enlarged view of the main portion showing another embodiment of the seat portion and the disk of the present invention.

<Description of the code used in the main part of the drawing>

10: valve body 11: inner surface

12: flange face 13: seat portion

14: hollow 20: disk

30: drive shaft

In order to achieve the above object, the present invention provides a valve body, a valve including a disk rotatably supported at both sides in the valve body to open and close a hole, and a drive shaft for rotating the disk, wherein the inner circumferential surface of the valve body And coated on both ends of the flange surface with a synthetic resin, to form a sheet portion on the surface in which the disk is in contact, so that the disk is in direct contact with the sheet portion.

In addition, the synthetic resin is a polyurethane.

In addition, a hollow portion is formed inside the sheet portion.

In addition, a plurality of compression grooves are formed on the inner circumferential surface and the flange surface.

The sheet portion is formed in a concave shape, and the sealing portion of the disk corresponding thereto is spherical and single in shape.

In addition, the seat portion is formed in a convex shape, the sealing portion of the disc corresponding thereto is concave and at the same time a single shape.

In addition, the drive shaft is a secondary eccentricity by "b" from the axial center line B-B 'line of the drive shaft in the state in which the drive shaft is eccentrically "a" from the center line A-A' line of the disk.

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

2 to 4 are views showing a positive pressure and anticorrosive valve of the present invention.

As shown, the positive pressure and anti-corrosion valve is composed of a valve body 10, a disk 20, and a drive shaft 30. Although not shown in the figure, a gear box is installed outside the valve body to rotate the drive shaft. have.

In the present invention, the description of the gearbox will be omitted for clarity and simplicity.

The valve body 10 has a flange surface 12 is formed on the inner circumferential surface 11 and both sides, the inner circumferential surface 11 and the flange surface 12 is coated with a synthetic resin material.

The synthetic resin material is preferably made of polyurethane.

The polyurethane has recently been increasing in demand due to environmentally friendly, there are two types of powder and waterborne (waterborne), both cases have the durability and heat resistance of the organic solvent type, but there is no environmental hazard.

In addition, polyurethane has the advantage of having high functionality and durability and resistance to ultraviolet rays.

The concave sheet portion 13 is formed at a portion where the disk 20 is in contact with the surface coated with the synthetic resin material, thereby improving adhesion to the disk 20.

The hollow part 14 is formed inside the seat part 13 so that the cushion can be smoothed when the disc is in contact.

In addition, a plurality of pressing grooves 15 are formed on the inner circumferential surface 11 and the flange surface 12 so that polyurethane is firmly coated on the inner circumferential surface 11 and the flange surface 12, and the surface is roughened to improve the pressing force. You can.

The disk 20 is made of a stainless material, the end is spherical to precise processing and polishing to be in direct contact with the sheet portion of the synthetic resin.

The drive shaft 30 is fixed to the disk 20 and is eccentric.

In addition, the positive pressure and anti-corrosion valve of the present invention has a double eccentric structure so that the seat portion 13 and the end of the disk 20 can be firmly coupled.

That is, the disk 20 seats by eccentrically "b" from the axial center line B-B 'line of the drive shaft 30 in a state where the disk 20 is eccentrically "a" from the center line A-A' line of the disk 20. When contacted with the part 13, the friction phenomenon is small, the wear of the polyurethane surface does not occur, and it is made of a structure that can withstand static pressure (arrow "A") and back pressure (arrow "B") sufficiently.

5 is an enlarged view of a main part of another embodiment of the seat portion and the disk of the present invention, wherein the seat portion 13 is formed in a convex shape, and the sealing portion of the disc 20 corresponding thereto is concave and single-shaped. Figures 1 to 4 are given the same number for convenience of explanation and to avoid confusion of the description.

Referring to the operation according to the present invention in detail as follows.

In the positive pressure / corrosion valve of the present invention, the valve body 10 is put into an electric furnace in a casting state to remove moisture, and then the polyurethane body is coated on the inner peripheral surface 11 and the flange surface 12 of the valve body 10.

Before the polyurethane coating, the hollow portion 14 is formed by inserting a rubber lake into a portion where the disk 20 is in contact with the surface. When the coating is completed, the outer side of the hollow portion 14 is the sheet portion 13. Is formed.

Then, the disk 20 is made of a stainless material, so as to precisely process and polish to form a contact force with the polyurethane coating surface.

In such a state, the drive shaft 30 is coupled to the disk 20, and the drive shaft 30 is coupled to both ends of the valve body 10.

In this state, although not shown in the drawing to rotate the drive shaft in the gearbox.

In the above, the seat 13 and the disk 20 are double eccentric, excellent in airtightness, and withstands positive and reverse pressures well.

As described above, the positive pressure and anticorrosive valve is coated with polyurethane on the valve body surface to improve the adhesion of the disc and to receive both forward and reverse pressure.

In addition, the disk sheet, tightening bolt, etc. are also unnecessary, and the disk is in direct contact with the polyurethane surface, thereby improving durability.

In addition, the use of a separate leak-proof packing on the flange surface is bonded to eliminate the need for packing, and the installation time is shortened. Also, it is effective in supplying clear water by blocking rust and corrosion in the valve in advance.

Claims (7)

In the valve comprising a valve body 10, a disk 20 for both sides rotatably supported inside the valve body 10, opening and closing the through hole, and a drive shaft 30 for rotating the disk 20, , The inner peripheral surface 11 and the both end flange surface 12 of the valve body 10 is coated with a synthetic resin, and the seat portion 13 is formed on the surface where the disk 20 is in contact, and the seat portion 13 A positive pressure and anti-corrosion valve, characterized in that the disk 20 is in direct contact. The method of claim 1, The positive pressure and anti-corrosion valve, characterized in that the synthetic resin is polyurethane. The method according to claim 1 or 2, A positive pressure and anti-corrosion valve, characterized in that the hollow portion 14 is formed inside the seat portion 13. The method according to claim 1 or 2, A positive pressure and anti-corrosion valve, characterized in that a plurality of crimp grooves (15) are formed on the inner circumferential surface (11) and the flange surface (12). The positive pressure and anti-corrosion valve according to claim 2, wherein the seat portion (13) is formed in a concave shape, and the sealing portion of the disk (20) corresponding thereto has a spherical shape and a single shape. The positive pressure and anti-corrosion valve according to claim 2, wherein the seat portion (13) is formed in a convex shape, and the sealing portion of the disk (20) corresponding thereto is concave and single in shape. The drive shaft of claim 1, wherein the drive shaft is secondary from the centerline line B-B 'of the drive shaft 30 by "b" in a state of being eccentrically "a" from the center line A-A' line of the disk 20. A positive pressure and anti-corrosion valve characterized by being eccentric.