KR102527350B1 - HDPE BODY Butterfly valve - Google Patents

Abstract

The present invention relates to a HDPE body butterfly valve comprising: a valve housing (100) having a flow path formed therein and having both ends opened; a valve disk (200) installed inside the valve housing to be able to rotate and opening and closing the flow path when rotating; a drive shaft (230) and an auxiliary shaft (240) fixed to shaft supporting parts (210, 220) of the valve disk (200) while penetrating the valve housing (100) in a radial direction, and supporting the valve disk (200) to be able to rotate; a first flange (300) adhering closely to a flange (110) on one side surface of the valve housing (100); a second flange (400) adhering closely to a flange (310) on one side surface of the first flange (300) and mounted by a first coupling member (500); a third flange (600) adhering closely to a flange (120) on the other side surface of the valve housing (100) and having a valve seat (610), which is in surface contact with a disk seat (250) end of the valve disk (200) to be sealed, integrally formed to extend; and a fourth flange (700) adhering closely to a flange (620) on the other side surface of the third flange (600) and mounted by the first coupling member (500), wherein the valve housing (100), the second flange (400), the fourth flange (700) are formed of a nonmetallic material for corrosion prevention, thereby including a corrosion preventing function. Therefore, corrosion resistance can be improved and the weight can be reduced.

Description

HDPE BODY Butterfly valve { HDPE BODY Butterfly valve }

The present invention relates to a HDPE body butterfly valve having a lightweight flange and a non-metallic body, and more particularly, to a valve body made of high density polyethylene (HDPE), which is a corrosion-resistant material, and a valve body made of high density polyethylene (HDPE). A butterfly valve in which a steel anti-deformation flange is integrated on one side of the flange, and one of the anti-deformation flanges on both sides of the valve is formed integrally with the valve seat to form a lightweight flange and an HDPE BODY butterfly valve having a non-metallic body. it's about

A butterfly valve is a valve installed in a pipeline for transporting fluids such as various industrial water and oil to control the flow of fluid. It is installed and consists of a disk that rotates by the drive shaft to open and close the passage provided by the valve body.

In the prior art butterfly valve shown in FIG. 1, the valve body 10 can effectively manufacture a large-sized butterfly valve by molding the butterfly valve with a synthetic resin material having high strength, It has the advantage of maintaining corrosion resistance even when transported, and the non-metallic butterfly valve has the greatest advantage of corrosion resistance and light weight, but the flange parts 20 and 30 connected to the water supply pipe are formed of metal, so the specific gravity of iron is 7.85, and the specific gravity of high-density polyethylene is 0.941 to 0.965, so the flange portion is heavier than the body of the valve, so there is a need for weight reduction.

In addition, in the fixing device 50 for fixing the body of the valve between the two flanges, the threads (SC; 52) of the first and second bolts screwed on both sides of the guide housing 51 are formed in opposite directions to each other , It is difficult to adjust the assembly torque applied to the guide housing 51 by assembling manually using the guide housing 51 formed in a prismatic shape.

In addition, the above-described butterfly valve is fixed by combining a keyway formed on the housing body, a key corresponding to the coupling groove, and a fixing clip so that the housing body has durability against the fluid pressure passing through the inside of the valve housing However, the strength of the key and the fixing clip is not sufficient, resulting in poor durability.

In addition, first and second through holes are formed in the housing body to couple the drive shaft support portion into which the drive shaft is inserted and the auxiliary shaft support portion, and the drive shaft support portion and the auxiliary shaft support portion pass through the first and second through holes in directions facing each other. Although through-coupled from the outside to the inside, there is a problem in that leakage occurs due to the operation of the drive shaft in the drive shaft support and auxiliary shaft support coupled to the first and second through holes of the housing body.

Korean Registered Patent Publication No. 10-1998860 Korean Patent Registration No. 10-1678171 Korean Registered Patent Publication No. 10-2316746 Korean Registered Patent Publication No. 10-2165195

Therefore, the present invention has been made to solve the problems of the prior art as described above, and the valve body in which a part of the flange, the drive shaft support and the auxiliary shaft support are integrally formed for coupling with both water supply pipes is made of high density polyethylene (HDPE). To provide an HDPE BODY butterfly valve having a weighted flange and a non-metallic body by making the valve disc and the driving part rotatable with the valve disc made of steel.

The present invention for achieving the above object is a valve housing 100 in which a flow path is formed and both ends are open, and a valve disc 200 rotatably installed in the valve housing and opening and closing the flow path during rotation. ) And a driving shaft 230 that passes through the valve housing 100 in the radial direction and is fixed to the bearing portions 210 and 220 of the valve disk 200 and rotatably supports the valve disk 200, and A first flange 300 in close contact with the auxiliary shaft 240, one side flange 110 of the valve housing 100, and a second flange in close contact with the one side flange 310 of the first flange 300 (400) is mounted by the first fastening member (500).

In addition, the third valve seat 610 is in close contact with the flange 120 on the other side of the valve housing 100, and the end of the disk seat 250 of the valve disk 200 is in surface contact and sealed. The flange 600 and the fourth flange 700 in close contact with the other side flange 620 of the third flange 600 are mounted by the first fastening member 500, and the valve housing 100 and the The second flange 400 and the fourth flange 700 are formed of a non-metal material for corrosion prevention to provide a butterfly valve with a lightweight flange and a non-metal body, characterized in that they have a corrosion prevention function.

To explain this in more detail, the second flange 400 and the fourth flange 700

First fastening holes 410 and 710 into which the first fastening member 500 is inserted are formed at regular intervals in the first concentric circle, and on the outer surfaces 430 and 730 of the second flange 400 and the fourth flange 700, the first fastening holes 410 and 710 are formed. In a concentric circle having a larger diameter (￠ 2) than the diameter (￠ 1) of the first fastening hole (410,710) at a depth at which the flat washer 520 and the fastening bolt 530 of one fastening member can be inserted and fastened. Bolt insertion holes 430 and 730 are formed.

In addition, the first fastening member 500 is composed of a support part 510 made of female screw parts of a right-hand screw at both ends, a flat washer 520, and a fastening bolt 530 coupled to the female screw part of the support part 510. After the second flange 400, the first flange 300, the valve housing 100, the third flange 600, and the fourth flange 700 are fastened by the first fastening member 500, The bolt insertion holes 430 and 730 of the second flange 400 and the fourth flange 700 are welded and filled with a non-metallic material for corrosion protection, and the fastening bolt 530 fastened to the support part 510 of the first fastening member is connected to the second flange ( 400) and the fourth flange 700 are fixed to the inside to prevent loosening.

In addition, in the second flange 400 and the fourth flange 700, the bolt insertion holes 430 and 730 are welded and filled with a non-metallic material for corrosion protection, and then the flange gasket seat surface is processed, and the bolt insertion holes 430 and 730 are welded and filled. formed to be included in the gasket seat surface.

In addition, the flange thickness (t) in which the first flange 300 and the second flange 400 are combined is applied to the thickness of the GS (Gray Iron Casting) material specified in KS B 2333, but the first flange 300 ) to make the thickness (t1) less than 1/3 of the flange thickness (t).

In addition, the valve housing body portion 130, the drive shaft support portion 140, and the auxiliary shaft support portion 150, which are components of the valve housing 100, are made of one body without joints, so that the thickness of the valve housing body portion 130 It is formed by processing a plate with

As parts of the valve body and valve flange of the present invention are made of high-density polyethylene (HDPE) material, there is an advantage in that corrosion resistance and light weight can be achieved.

In addition, the fastening member for fixing the valve body between the two flanges includes a support portion 510 formed of right-hand female screw parts at both ends of a polygonal body having a flat surface capable of contacting the valve body, and high-density polyethylene (HDPE). ) A bolt insertion hole is formed inside the material flange, and after fastening to the female thread of the support part 510 with a fastening bolt, the bolt insertion hole is welded to fill the fastening bolt to be inserted into the flange to prevent loosening. .

In addition, since the fastening bolts can be assembled with a uniform torque in the bolt insertion holes formed on the outer sides of both sides of the assembled body, the pressure acting on the flanges and the valve housing to be assembled can be uniformly adjusted, so that the water pressure inside the valve can be adjusted evenly. It has the advantage of increasing durability.

In addition, after welding the bolt insertion hole of the flange with a non-metallic material for corrosion protection, the flange gasket seat surface is processed, and the weld-filled surface of the bolt insertion hole is included in the gasket seat surface to prevent leakage of the contact portion between the flange and the valve housing. It has the advantage of being able to prevent and reduce the moment applied to the flange.

In addition, since the drive shaft support portion and the auxiliary shaft support portion into which the drive shaft is inserted into the housing body are integrally formed, leakage of the assembly unit and deformation of the valve body made of high density polyethylene (HDPE) due to the load of the valve opening/closing driving unit can be prevented.

1 is a view showing a non-metallic butterfly valve of the prior art of the present invention.
Figure 2 is a perspective view showing a butterfly valve having a lightweight flange according to the present invention (closed state).
Figure 3 is a perspective view (open state) showing a butterfly valve having a lightweight flange according to the present invention.
Figure 4 is an exploded perspective view showing a butterfly valve having a lightweight flange according to the present invention.
5 is a cross-sectional view of a flange made of high-density polyethylene (HDPE) and an enlarged view of a main part according to the present invention.
6 is a view showing a valve body assembled with a lightweight flange according to the present invention.
7 is an enlarged view of a main portion of a valve body in which the lightweight flange of FIG. 6 is assembled;

Advantages and features of the present invention, and methods for achieving them will become clear with reference to the detailed embodiments described below in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in a variety of different forms, only the embodiments of the present invention make the disclosure of the present invention complete, and common knowledge in the art to which the present invention pertains. It is provided to completely inform the person who has the scope of the invention, and the present invention is defined by the description of the claims.

Meanwhile, terms used in this specification are for describing embodiments and are not intended to limit the present invention.

In this specification, singular forms also include plural forms unless specifically stated otherwise in a phrase. As used herein, “comprises” and/or “comprising” means the presence of one or more other components, steps, operations, and/or elements in the stated component, step, operation, and/or element. or adding Hereinafter, a butterfly valve having a lightweight flange according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

2 to 7, the butterfly valve (A) having a lightweight flange according to an embodiment of the present specification has a cylindrical flow path formed therein, both ends are open, and a non-metallic material for preventing corrosion. A valve housing 100 formed of, a valve disc 200 rotatably installed inside the valve housing 100 within 90 degrees by driving an actuator (not shown), and opening and closing the flow path during rotation, the valve disc A driving shaft 230 and an auxiliary shaft 240 fixed to the bearing parts 210 and 220 of the 200 and rotatably supporting the valve disc 200, and a flange 110 on one side of the valve housing 100. A first flange 300 in close contact with the first flange 300 and a second flange 400 in close contact with the flange 310 on one side of the first flange 300 are mounted by the first fastening member 500, and the valve housing The third flange 600 in which the valve seat 610, which is in close contact with the other side flange 120 of the 100 and is sealed by surface contact of the end of the disk seat 250 of the valve disk 200, extends integrally with the third flange 600 The fourth flange 700 in close contact with the third flange 600 and the other side flange 620 is mounted by the first fastening member 500, and the valve housing 100 and the second flange 400 , It is characterized in that the fourth flange 700 is formed of a non-metallic material for corrosion prevention to have a corrosion prevention function.

The non-metallic material is made of high-density polyethylene (HDPE), and the first fastening member 500 is composed of right-hand female screw parts at both ends of a polygonal body having a flat lower surface so that the lower surface cannot rotate in contact with the valve body. It consists of a support part 510, a flat washer 520, and a fastening bolt 530 coupled to the female screw part of the support part 510.

The fastening bolt 530 may be selected from a hexagon socket head bolt, a hexagon head bolt, and a small screw.

Here, the second flange 400 and the fourth flange 700 are formed in a disk shape having an outer diameter D and a thickness t2, and the first fastening member 500 is formed at regular intervals in the first concentric circle C1. The first fastening holes 410 and 710 into which the threaded portion of the fastening bolt 530 is inserted into the female threaded portion of is formed with a diameter of ￠1, and the outer surfaces of the second flange 400 and the fourth flange 700. (430,730) has a diameter (￠ 1) concentric with the diameter (￠ 1) of the first fastening hole (430,730) at a depth (dp) at which the flat washer 520 and the fastening bolt 530 of the first fastening member can be inserted and fastened. Bolt insertion holes 430 and 730 formed with a larger diameter (￠ 2) than ￠ 1) are formed.

After assembling the first flange 300 and the second flange 400 on one side of the valve housing 100 and the third flange 600 and the fourth flange 700 on the other side, The support part 510 is provided on the outside of the valve housing 100, and the second flange 400 is provided on one side of the housing 100, and the first flange 300 and the third flange are on the other side of the housing 100 ( 600), the flat washers 520 are inserted into the bolt insertion holes 430 and 730 formed in the second flange 400 and the fourth flange 700, respectively, and fastened with fastening bolts 530.

In this way, in a state where the support part 510 is provided on the outside of the body part, an automated machine can be used by fastening with the fastening bolt 530 to the bolt insertion holes 430 and 730 provided on the outside of both sides of the assembled valve body. The support part 510 outside the part can uniformly adjust the torque applied to the fastening bolt 530 fastened to the support part 510 by an automated machine without the need for a separate fixing device or tool, so that the assembled flanges and Since the pressure acting on the valve housing 100 can be uniformly adjusted, it has an effect of increasing durability against water pressure inside the valve.

In addition, the valve body portion fastening the second flange 400, the first flange 300, the valve housing 100, the third flange 600, and the fourth flange 700 by the first fastening member 500. When the assembly is completed, the valve body part can be checked for leakage through an internal pressure test, and the bolt insertion holes 430 and 730 of the second flange 400 and the fourth flange 700 of the valve body part where no leakage is confirmed are for corrosion prevention. An insert for fixing the fastening bolt 530 fastened to the support 510 of the first fastening member by welding a non-metallic material to the inside of the second flange 400 and the fourth flange 700 ) to prevent loosening.

The valve body assembled as described above and the bolt insertion holes 430 and 730 welded and filled with a non-metallic material for corrosion protection has an inter-face dimension (L) and the outside of the flange to conform to the industrial standard KS B 2333 (butterfly valve) regulation The processing part (A) is machined to suit the diameter (D), gasket sheet outer diameter (g), bolt hole center circle diameter (c), and gasket sheet height (f).

In this way, after filling the bolt insertion holes 430 and 730 of the second flange 400 and the fourth flange 700 with a non-metallic material for corrosion prevention, the weld-filled surfaces of the bolt insertion holes 430 and 730 are gasket sheets. A first concentric circle (C1) is designed to be included in the surface, the flange gasket seat surfaces of the second flange 400 and the fourth flange 700 are processed, and the weld-filled surfaces of the bolt insertion holes 430 and 730 are It is formed to be included in the gasket seat surface.

In addition, KS B 2333, an industrial standard for butterfly valves, specifies the shape and dimensions of the valve's face-to-face distance, flange diameter, thickness, gasket sheet outer diameter, etc. for compatibility with the butterfly valve.

In a butterfly valve assembling a non-metallic valve housing, the first fastening member should be located close to the outer diameter of the valve housing to prevent leakage of the contact portion between the flange and the valve housing and to reduce the moment applied to the flange.

However, when the first fastening member is located close to the outer diameter of the valve housing, there is a problem that the through hole into which the first fastening member is inserted into the flange is located inside the outer diameter of the gasket sheet. ) can be assembled so that the second flange 400 and the fourth flange 700 can be assembled, and after filling the bolt insertion holes 430 and 730 of the second flange 400 and the fourth flange 700 by welding with a non-metallic material for corrosion protection, the second flange 400 and the fourth The flange gasket seat surface of the flange 700 is processed, and the weld-filled surfaces of the bolt insertion holes 430 and 730 are formed to be included in the gasket seat surface.

In addition, the second flange 400 and the fourth flange 400 of the butterfly valve fastened by the first fastening member 500 between the flanges 11 and 21 of the first and second water pipes 10 and 20 connected to the valve of the present application. Assemble by inserting the flange 700 into close contact.

In a state where the flanges 11 and 21 of the first and second water pipes 10 and 20 and the second flange 400 and the fourth flange 700 of the butterfly valve are in close contact with the second flange 400 It is fastened by a plurality of second fastening members 800 coupled to the third and fourth fastening holes 440 and 740 formed in the fourth flange 700 in close contact with the first flange 300 and the third flange 600. Accordingly, the butterfly valve, the first water supply pipe 10, and the second water supply pipe 20 may be jointly connected.

In this way, the first flange 300 and the third flange 600, which are fastened to prevent damage caused by bolts or nuts when connecting the first and second water pipes 10 and 20, are formed of steel (metal material). When the first flange 300 of steel and the second flange 400 made of non-metallic material are combined, the total thickness (t) of the flange is made of GS (Gray Iron Casting) specified in KS B 2333, an industrial standard. It is applied to the thickness, but the thickness (t1) of the first flange 300 and the third flange 600 made of steel is made less than 1/3 of the total thickness (t) of the flange to have a lightweight flange.

Although the present invention has been described in detail through specific examples, this is for explaining the present invention in detail, the present invention is not limited thereto, and within the technical spirit of the present invention, by those skilled in the art It is clear that modifications and improvements are possible.

All simple modifications or changes of the present invention fall within the scope of the present invention, and the specific protection scope of the present invention will be clarified by the appended claims.

100: valve housing 200: valve disc
210: bearing part 230: drive shaft
300: first flange 400: second flange
500: first fastening member 510: support of the first fastening member
520: flat washer 530: fastening bolt
600: third flange 610: valve seat
700: 4th flange 710: 1st fastening hole
720: outer surface of the fourth flange 730: bolt insertion hole
t; Flange thickness t1: First flange thickness

Claims (4)

A valve housing 100 having a flow path formed therein and opening both ends;
A valve disc 200 rotatably installed in the valve housing and opening and closing the passage when rotated;
Drive shaft 230 and auxiliary shaft ( 240) and,
A first flange 300 in close contact with the flange 110 on one side of the valve housing 100;
The second flange 400 in close contact with the one side flange 310 of the first flange 300 is mounted by the first fastening member 500,
A third flange in which the valve seat 610, which is in close contact with the flange 120 on the other side of the valve housing 100 and is sealed by surface contact of the end of the disk seat 250 of the valve disk 200, extends integrally ( 600) and,
The fourth flange 700 in close contact with the other side flange 620 of the third flange 600 is mounted by the first fastening member 500, the valve housing 100, the second flange 400, The fourth flange 700 is formed of high-density polyethylene (HDPE) material to have a light weight and anti-corrosion function,
The second flange 400 and the fourth flange 700
First fastening holes 410 and 710 into which the threaded part of the fastening bolt 530 is inserted are formed at regular intervals in the first concentric circle c1,
The outer surfaces 430 and 730 of the second flange 400 and the fourth flange 700 have first fastening holes at a depth at which the flat washers 520 and fastening bolts 530 of the first fastening member can be inserted and fastened. Bolt insertion holes 430 and 730 formed as concentric circles having a diameter (￠ 2) larger than the diameter (￠ 1) of (410,710) are formed,
After the second flange 400, the first flange 300, the valve housing 100, the third flange 600, and the fourth flange 700 are fastened by the first fastening member 500, the second flange The bolt insertion holes 430 and 730 of the 400 and the fourth flange 700 are welded and filled with a non-metallic material for corrosion protection, and the fastening bolt 530 fastened to the support part 510 of the first fastening member is connected to the second flange 400. And the HDPE BODY butterfly valve characterized in that the fourth flange 700 is inserted to be fixed to the inside to prevent loosening. According to claim 1,
The first fastening member 500 is
The lower surface includes a support portion 510 composed of a female thread portion of a right-hand thread at both ends of a polygonal body having a plane capable of contacting the valve body, a flat washer 520, and a fastening bolt 530 coupled to the female thread portion of the support portion 510. ) HDPE BODY butterfly valve, characterized in that consisting of. According to claim 1,
The second flange 400 and the fourth flange 700 are
After welding the bolt insertion holes 430 and 730 with a non-metallic material for corrosion protection, the flange gasket seat surface is processed,
The HDPE BODY butterfly valve, characterized in that the welded and filled surfaces of the bolt insertion holes (430, 730) are included in the gasket seat surface. According to claim 3
The flange thickness (t) in which the first flange 300 and the second flange 400 are combined is applied to the thickness of the GS (Gray Iron Casting) material specified in KS B 2333, but the first flange 300 HDPE BODY butterfly valve, characterized in that the thickness (t1) is less than 1/3 of the flange thickness (t).

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