KR100323883B1 - Flange connecting method to improve sealing quality - Google Patents

Abstract

An object of the present invention is to provide a flange connection method that can evenly and optimally set the filling amount of the liquid gasket, and ensure the sealing property over the entire flange surface.

To this end, the present invention comprises the steps of forming a groove to form a closed loop on one side flange connection surface in the bolt fastening member using a flange, such as a fluid transfer pipe;

Forming an inlet to communicate with the outside from the closed loop groove;

Assembling bolts by bringing both flanges into close contact;

And pressing the liquid gasket through the inlet to fill the closed loop groove.

Description

Flange connecting method to improve sealing quality

The present invention relates to a flange connection method for improving the sealability.

As shown in Fig. 3, in connecting two fluid transfer pipes 10 and 11, a method of fastening the flanges 12 and 13 to each other and fastening them with bolts 14 is widely used.

At this time, sealing is performed to prevent the leakage of fluid through the gap between the flanges 12 and 13. The sealing method uses a 0-ring or the like or applies a liquid gasket to the contact surfaces of the flanges 12 and 13. The way to do it is used.

In order to apply the liquid gasket, a groove 15 is formed in the flange 13 as shown, and when the liquid gasket is filled in the groove 15, it is hardened and sealed.

However, according to the seal structure of the liquid gasket, since the groove 15 is not formed around the bolt hole 16, it is difficult to determine the coating amount so that the liquid gasket has a uniform amount and thickness around the bolt hole 15. In general, the liquid gasket flows along the plane and spreads out thinly and escapes out of the flanges 12 and 13 so that the thickness of the gasket becomes thin. There is a problem that the fluid may leak.

In addition, it was impossible to optimally set the amount of the liquid gasket to be filled in the groove 15.

Accordingly, the present invention has been proposed in view of the above-mentioned point, and an object thereof is to provide a flange connection method capable of evenly and optimally setting the filling amount of a liquid gasket and ensuring sealing property over the entire flange surface.

In order to achieve the above object, the flange connection method of the present invention comprises the steps of forming a recess to form a closed loop on one side of the flange connection surface in the bolt fastening member using a flange, such as a fluid transfer pipe;

Forming an inlet to communicate with the outside from the closed loop groove;

Assembling bolts by bringing both flanges into close contact;

And pressing the liquid gasket through the inlet to fill the closed loop groove.

1 is an exploded view of parts showing a flange connection according to the present invention;

2 is an assembled state diagram of the present invention

3 is a prior art

※ Explanation of codes for main parts of drawing

1,2: fluid transfer pipe 3,4: flange

4a: flange connection surface 5: closed loop groove

6: inlet part 7: bolt hole

8: bolt

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

1 and 2 is a view showing a flange connection according to the present invention. In the drawings, reference numerals 1 and 2 are members for which pressure is applied, for example, a fluid transfer pipe, or a member requiring sealing such as a rocker cover or a cylinder head. Explain.

The fluid transfer pipes 1 and 2 are formed with flanges 3 and 4 for connection, and one side (or both) flange connection surfaces 4a are provided with grooves 5 forming a closed loop. The loop groove 5 extends through the inlet 6 to the periphery of the flange 4 and communicates with the outside.

Accordingly, the closed loop groove 5 is formed by bypassing the bolt hole (7) is not interrupted in the middle.

In the present invention as described above, after the closed loop groove 5 is formed on the flange connection surface 4a, both flanges 3 and 4 are brought into close contact with each other to fasten the bolt 8.

In such a state, since the inlet part 6 is exposed to the outside of the flanges 3 and 4, when the nozzle is placed on the inlet part 6 using a liquid injection gun (not shown) to operate the liquid injection gun, the liquid gasket is injected. The injected liquid gasket is uniformly filled at the same pressure in the entire closed loop groove 5 while spreading along the closed loop groove 5 forming a long tunnel in the flange 3, 4.

As a result, there is no waste of liquid gasket, and uniform thickness and amount can be applied, and uniform sealing force can be secured over the entire flange.

The present invention improves the application process of the liquid gasket, it is possible to apply the liquid gasket to have a uniform thickness in a uniform amount over the entire closed loop groove to ensure the sealability over the entire connecting surface of the flange In addition, there is an effect that the liquid gasket overflows to the outside of the flange or the continuity is not interrupted.

Claims (1)

Forming bolts to form a closed loop on one flange connection surface when bolting a member requiring a seal such as a fluid transfer pipe using a flange; Forming an inlet to communicate with the outside from the closed loop groove; Assembling bolts by bringing both flanges into close contact; And pressing the liquid gasket through the inlet to fill the closed loop groove.