KR101855157B1

KR101855157B1 - Joined structure of jagged type seat disc for gate valves

Info

Publication number: KR101855157B1
Application number: KR1020150182271A
Authority: KR
Inventors: 김재돌
Original assignee: 동명대학교산학협력단
Priority date: 2015-12-18
Filing date: 2015-12-18
Publication date: 2018-05-04
Also published as: KR20170073394A

Abstract

The gate valve coupling structure according to the present invention includes: a hollow pipe-shaped seat body 100 in which an interior is hollow; A stepped portion 210 having an outer circumferential surface that coincides with an inner circumferential surface of the seat body 100 and is in tight contact with the inner circumferential surface of the seat body 100 and is smaller in diameter than the outer circumferential surface, A sheet disc (200) forming a toothed toothed engagement surface (211) on a side surface thereof; A disk jaw 310 having an outer diameter matching an end jaw 210 of the seat disk 200 is formed at an upper end of the disk jaw 310. The disk jaw 310 has an outer circumferential surface that coincides with an inner circumferential surface of the seat disk 200, And a disc 300 that forms tooth-like engaging surfaces 311 having a serrated tooth shape on a surface of the step portion 210 that matches the tooth-like engaging surface 211. [

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a gate valve assembly having a serrated-

More specifically, the present invention relates to a gate valve, in which a contact portion between a disk and a seat disk is formed as a serrated surface, and a sawtooth sheet disk The present invention relates to a gate valve coupling structure to which a gate valve is coupled.

In the case of shipyards and onshore plants, since the installation site is getting narrower due to the enormous size of vessels and structuring, a compact size is requested, so a gate valve that does not change stems during valve operation is needed.

Generally, gate valves are widely used because they are light in weight, small in volume, superior in price competitiveness, and low in operating force compared to other valves of the same diameter.

In the gate valve, a disk is rotatably installed inside a valve body connected to a pipeline, the disk is rotated by a rotation shaft, and the rotation shaft is rotated by a driving device connected to the pipeline to open and close the pipeline. When the inner circumference of the valve body and the outer periphery of the disk are closed, And a seat portion to be pressed is provided.

The conventional gate valve is provided with a disk which is opened and closed by rotation so as to control the flow of the fluid inside the valve body connected to the pipeline, and a rubber sheet of rubber material is formed on the outer circumferential surface of the disk to prevent the fluid from flowing out. Sealing process.

It is difficult to expect complete leakage of water by sealing by using a sheet of rubber material as described above. Due to the characteristics of rubber, when it is used for a long time, it causes problems such as expansion, cracking and elasticity loss due to aging phenomenon including wear and tear Therefore, there is an uneconomical problem that the maintenance cost is excessively expended because repair work such as repair or replacement of the sheet due to failure such as leakage is frequent due to failure to act properly as a seat.

In order to overcome these disadvantages, in recent years, a disk sheet of a metal material has been installed to increase the leakage-blocking effect and to maintain a circular shape even if it is used for a long period of time. However, In order to enable opening and closing, the rotary shaft of the disk is designed and assembled as double or triple eccentricity to minimize the rotation interference.

In order to avoid rotation interference of the seat surface, the disc seat type gate valve of the prior art uses a dual eccentric eccentrically biased eccentric drive shaft. However, when the valve is opened, An additional force is generated due to a difference in hydraulic pressure acting on the upper and lower portions, and a larger driving force is required at the time of rotation, thereby causing loss of driving force.

In order to solve the problem caused by the double eccentricity, the valve disc is rotated by a predetermined angle about the reference axis of the conical valve disc with the point of intersection of the valve center line and the seat center line as a reference point, The eccentric triple-eccentric structure is provided to ensure a mobility without interference during rotation and to maximize the blockability according to the bidirectional fluid flow. However, since the installation is complicated and an accurate angle is required along the reference point and the intersection point, There is a problem that the production cost increases.

KR Patent Registration No. 10-1315998 B1

US Publication No. 2015/0137016 Al

US Patent No. 7,255,329 B1

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above problems of the prior art.

More specifically, the present invention provides a gate valve for preventing leakage of water due to a shock due to a pressure of a fluid flowing through the gate valve and a temperature difference, because the contact portion between the disk and the seat disk is a simple gate- The present invention relates to a gate valve coupling structure in which a serrated disc is used in which a contact portion between a disc and a sheet disc is formed of a serration-like coupling surface so as not to generate leakage even under an impact caused by a pressure and a temperature difference applied to the valve.

According to an aspect of the present invention, there is provided a gate valve coupling structure including: a hollow pipe-shaped seat body having an inner space; A stepped portion 210 having an outer circumferential surface that coincides with an inner circumferential surface of the seat body 100 and is in tight contact with the inner circumferential surface of the seat body 100 and is smaller in diameter than the outer circumferential surface, A sheet disc (200) forming a toothed toothed engagement surface (211) on a side surface thereof; A disk jaw 310 having an outer diameter matching an end jaw 210 of the seat disk 200 is formed at an upper end of the disk jaw 310. The disk jaw 310 has an outer circumferential surface that coincides with an inner circumferential surface of the seat disk 200, And a disc 300 that forms tooth-like engaging surfaces 311 having a serrated tooth shape on a surface of the step portion 210 that matches the tooth-like engaging surface 211. [

As described above, according to the present invention, since the contact between the seat disk and the disk is constituted by the serrations of the toothed engagement surface 211 and the toothed engagement surface 311, And it is possible to reduce the cost of replacing the valve. In the case of the ship, the overall reliability of the transformer cooling system is increased, considering that the overhaul of the sailing vessel is impossible.

1 is an illustration of a gate valve coupling structure to which a sawtooth sheet disk according to an embodiment of the present invention is applied;
FIG. 2 is an example of a tooth profile of a toothed coupling portion of a gate valve coupling structure to which a sawtooth sheet disk according to an embodiment of the present invention is applied; FIG.
3 is a view illustrating an example of a toothed coupling portion and a toothed coupling portion of a gate valve coupling structure using a sawtooth sheet disk according to an embodiment of the present invention;

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings, but the present invention is not limited by the scope of the present invention.

Referring to FIG. 1, the gate valve coupling structure according to the present invention includes: a hollow pipe-shaped seat body 100 having an interior hollow; A stepped portion 210 having an outer circumferential surface that coincides with an inner circumferential surface of the seat body 100 and is in tight contact with the inner circumferential surface of the seat body 100 and is smaller in diameter than the outer circumferential surface, A sheet disc (200) forming a toothed toothed engagement surface (211) on a side surface thereof; A disk jaw 310 having an outer diameter matching an end jaw 210 of the seat disk 200 is formed at an upper end of the disk jaw 310. The disk jaw 310 has an outer circumferential surface that coincides with an inner circumferential surface of the seat disk 200, And a disc 300 that forms tooth-like engaging surfaces 311 having a serrated tooth shape on a surface of the step portion 210 that matches the tooth-like engaging surface 211. [

1, a hollow valve seat 200 is inserted and coupled into a hollow pipe-shaped seat body 100 as shown in FIG. 1. In the case of such a seat disk, as shown in FIG. 1, The step portion 210 having a smaller diameter than the outer peripheral surface is formed.

As shown in the right side detail of FIG. 1, the step portion 210 has a tooth-like toothed coupling surface 211 formed on the side surface thereof. The toothed coupling surface 211 is formed on the side of the toothed coupling surface 211, Like tooth-like engagement surface 311 having the same tooth shape on the surface of the tooth-shaped engagement surface 311.

That is, the disc jaw 310 of the disc 300, which is inserted into the seat disc 200 and has an outer diameter at an upper end thereof and has an outer diameter matching with the outer jaw 210 of the seat disc 200, 310 are formed to engage with and engage with the step portion 210 of the seat disk 200. As a result, the contact area is widened as compared with a conventional general gate valve having surface coupling, It increases the coupling force and reduces the sliding phenomenon caused by the side vibration. Thus, it prevents the leakage of the valve due to wear of the inner fluid due to pressure and temperature difference.

The tooth-like engaging surface 211 and the tooth-engaging surface 311 are formed in mutually toothed tooth-like teeth to be mutually toothed. The tooth-like engaging surface 211 and the tooth- Shape.

Next, the tooth profile has a shape in which the lower end side of the recessed portion, which is recessed in the sawtooth shape, coincides with the end side of the projecting portion, so that the tooth engagement surface 211 and the tooth- In addition to the side vibration, it is intended to reduce the jarring phenomenon with respect to the up-and-down vibration. Due to the characteristics of the gate valve, vibration in various directions is accompanied by vibration of the gate valve. .

3, the seat disk 200 and the disk 300 may have projections and / or projections on the side of the vertical contact surface, in addition to the horizontal contact surfaces of the tooth engagement surface 211 and the toothed engagement corresponding surface 311, A groove corresponding to the protrusion is formed so that when the disc 300 is inserted into the disc 200, the disc 300 is coupled in an interference fit by the engagement of the groove and the protrusion, It is possible to perform a function of reducing the jarring phenomenon with respect to the vertical vibration in addition to the lateral vibration by the interference fit of the groove corresponding to the projection and the projection on the side surface of the vertical contact surface in place of the interference fit method of the toothed engagement surface 311 .

In addition, the tooth-like engaging surface 211 and the tooth-engaging surface 311 have a tooth-like cross-sectional shape in a triangular shape. The triangle is an isosceles triangle shape, and a virtual vertical line To form an angle of 30 to 45 degrees, and the interval between the respective teeth is preferably determined between 5 and 20 mm.

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments.

100: seat body
200: sheet disk
210:
211: Toothed coupling surface
300: disk
311: Toothed coupling corresponding surface

Claims

A hollow pipe-shaped seat body 100 in which an inner space is hollow;
A stepped portion 210 having an outer circumferential surface that coincides with an inner circumferential surface of the seat body 100 and is in tight contact with the inner circumferential surface of the seat body 100 and is smaller in diameter than the outer circumferential surface, A sheet disc (200) forming a toothed toothed engagement surface (211) on a side surface thereof;
A disk jaw 310 having an outer diameter matching an end jaw 210 of the seat disk 200 is formed at an upper end of the disk jaw 310. The disk jaw 310 has an outer circumferential surface that coincides with an inner circumferential surface of the seat disk 200, And a disk (300) forming a tooth-like engaging surface (311) having a serrated tooth-like shape on a surface of the tooth corresponding to the tooth-like engaging surface (211) of the step portion (210) Bond structure.

The method according to claim 1,
The tooth-like engaging surface 211 and the tooth-engaging surface 311 are formed by mutually tooth-like teeth having tooth shapes, and the tooth-shaped teeth and the tooth-like engaging surface 311 are circular or polygonal in cross section Characterized by a gate valve coupling structure.

3. The method of claim 2,
The tooth profile has a shape in which the lower end side of the recessed portion recessed in the sawtooth shape coincides with the end side of the projected portion protruding convexly from the sawtooth shape so that the toothed engagement surface 211 and the toothed engagement corresponding surface 311 Wherein the valve body is capable of being coupled in a mutual interference fit manner.

The method according to claim 1,
The seat disk 200 and the disk 300 are formed with grooves corresponding to the projections and projections on the side of the vertical contact surface in addition to the horizontal contact surfaces of the tooth engagement surface 211 and the tooth engagement surface 311, Wherein when the disk (300) is inserted into the seat disk (200), the disk (300) is coupled in an interference fit by the engagement of the groove and the projection.

The method according to claim 1,
The tooth-like engaging surface 211 and the tooth-engaging surface 311 have a tooth-like cross-sectional shape of a triangle, and the triangle is an isosceles triangle shape. The triangle has an imaginary vertical line Wherein an angle of 30 to 45 degrees is formed with respect to the width of the gate valve, and the interval between the respective teeth is determined between 5 and 20 mm.