KR980010075A - Gate valve for opening and closing chemical tank outlet - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gate valve for opening and closing a chemical tank outlet to be installed in a tank for storing chemical substances such as powder and particulate matter, The chemical in the tank is oxidized and deteriorated by the influxed air or moisture. Therefore, a gas inflow pipe is piped to the upper part of the tank to inject a gas such as nitrogen (N2) which prevents the deterioration of chemical substances in the tank, It is necessary to increase the pressure inside the tank by opening the open valve of the gate valve to discharge the chemicals in the tank or to open the open tube and the seat ring with the open tube closed to allow the outside air or moisture to flow into the tank In the prior art, a seat ring fixed to a valve body is fixed and an o-ring is fixed to the opening-closing tube to seal the valve. Therefore, since the rubber o-ring and the open-close pipe are not smoothly wetted, the load on the cylinder for operating the open-close pipe is considerably increased. In addition, since the open-close pipe is closed and the seal is not good, A large amount of nitrogen gas was leaked to the outside, causing a great deal of waste of gas.

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a cylinder for operating a gas- In addition, it is possible to reduce the load on the gullill, and by the elasticity of the O-ring of the rubber system, the Teflon seal is always kept in close contact with the open-close pipe, thereby improving the sealing force. In addition, the seat ring has a smaller width (H2) of the particles than the particles of the particle chemical, so that when the opening or closing of the pipe is opened or closed, the Teflon filling is broken and broken by the pressing of the particles.

Description

Gate valve for opening and closing chemical tank outlet

FIG. 1 is a sectional view of the present invention. FIG.

2 is an operational sectional view of the present invention.

3 is an operational sectional view of the present invention.

FIG. 4 is an enlarged sectional view of the main part of the present invention. FIG.

5 is an attempted opening and closing judge of the present invention.

DESCRIPTION OF THE REFERENCE NUMERALS

1: Valve body 1A: Guide groove

101: upper flange 102: lower flange

2: seat ring 2A, 2B:

201: Home 2: Seat ring

3A: inclined discharge hole 301: groove

4: bolt 5: open-close

5A: Exhaust hole 6: Cylinder

6A: piston rod 7: tank

8: gas injection tube 9: discharge tube

10: Bolt 11: Teflon sealing

12: O-ring 13: Particle

H1: large H2: small width

BACKGROUND OF THE INVENTION Field of the Invention [0001] The present invention relates to a gate valve for opening and closing a chemical tank expansion valve installed in a tank for storing chemical substances in powder and particulate form.

The tank for storing the chemical is oxidized by the air or water introduced into the tank by external air or water when the external air or water is introduced into the tank. Therefore, the gas inlet pipe is piped to the upper part of the tank, (N2) to prevent the deterioration of the tank, so that the pressure in the tank is made higher than the atmospheric pressure to open the open valve of the gate valve to discharge the chemical substance in the tank, or to open the open- And it is structured such that the seat ring fixed to the conventional valve body can be fixed to seal the valve by closing the opening ring so that it can be sealed by the rubber ring o- And the opening of the open-close pipe can not be smoothly carried out, so that the load on the cylinder for operating the open-close pipe is considerably increased In the closed state of the closed pipe, the airtightness is not good, and the nitrogen gas injected at a pressure higher than atmospheric pressure leaks a large amount to the outside, resulting in a problem of waste of gas.

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a cylinder for operating the open-close tube such that the hard, smooth Teflon seal is resiliently deformed into the groove of the seat ring fixed to the valve body, And the sealing force can be improved by allowing the Teflon sealing to always adhere well to the open-close pipe due to the elasticity of the O-ring made of rubber so as to reduce the amount of leakage of the nitrogen gas in the tank (H1) of the particles of the particulate chemical substance and a smaller width (H2) than that of the particle, and the Teflon sealing is broken and broken by the compression of the particles when the open-close pipe is opened or closed As long as it is possible to prevent this, a gate valve for opening and closing a chemical tank outlet is invented. The following description will be made in detail with reference to the accompanying drawings.

A seat ring 3 having a seat ring 2 and an inclined discharge hole 3A is fixed by a bolt 4 to a valve body 1 having a guide groove 1A, Closing tube 5 is opened and connected to the piston rod 6A of the cylinder 6 so as to be able to move to the left and right while the upper flange 101 of the valve stop 1 is provided with a gas injection pipe 8 The groove 201 of the seat ring 2 and the groove of the seat ring 3 are engaged with each other by a bolt 10 to fix the tank 7 to the lower flange 102, The Teflon seal 11 is elastically urged by the O-ring 12 made of rubber and the seat ring 2 is provided with a ring 2A having a larger width H1 than the particles 13 of the chemical substance, And the protrusion 2B of the width H2 is protruded.

The function and effect of the present invention will be described as follows.

Nitrogen (N 2) gas is injected into the tank 7 through the gas injection pipe 8 and is always maintained at a pressure higher than atmospheric pressure.

Accordingly, even when the open-close pipe 5 is completely opened as in the first aspect to discharge the chemicals in the tank 7, external air or moisture is prevented from flowing into the tank 7, And the piston rod 6A are operated to partially close the open-close pipe 5 as shown in FIG. 2, a part of the particles 13 is discharged to the discharge hole 5A and the inclined discharge hole 3A of the seat ring 3 Closing the open-close pipe 5 completely stops the discharge of the chemical substance particles 13 and at the same time, the high-pressure nitrogen gas in the tank 7 flows out through the Teflon sealing 11 The outside air or moisture is prevented from flowing into the tank 7. When the open-close pipe 5 is in operation, the open-close pipe 5 operates very smoothly due to the characteristics of the smooth Teflon In the closed state, due to the elastic force of the O-ring 12 made of rubber, Seal 11 is a very small amount since the cake is very close to the one closing yanghohi 5 is leaking nitrogen gas.

Thus, waste of nitrogen gas can be prevented.

When the open-close pipe 5 is completely closed as in the case, the particles 13 are pushed between the open-close pipe 5 and the seat ring 2 by the open-close pipe 5 to be moved, (2B) having a smaller width (H2) than the secondary particles (13) at the same time as it is pushed into the swirling ring (2A) having a larger width (H1) Is moved to the Teflon sealing side, there is no possibility that the Teflon seal 11 is broken or broken by the contact impact with the large particle 13.

Since the present invention causes the Teflon seal 11 to contact the open-close pipe 5 to slide the open-close pipe 5, the open-close pipe 5 is smoothly moved due to the characteristics of the smooth Teflon, The leakage amount of the nitrogen gas can be remarkably reduced because the Teflon seal 11 is closely adhered to the open-close pipe 5 by the elastic force of the O-ring 12 made of rubber, It is possible to prevent the large particles 13 of the chemical substance from being directly in contact with the Teflon seal 11 by the action of the Teflon seal 11 and to prevent the Teflon seal 11 from being broken or damaged.

Claims (1)

A seat ring 3 having a seat ring 2 and an inclined discharge hole 3A is fixed by a bolt 4 to a valve body 1 having a guide groove 1A, Closing pipe 5 having the opening 5A open to the piston node 6A of the cylinder 6 so as to be able to move to the left and right while the upper flange 101 of the valve body 1 is connected to the gas injection pipe And the lower flange 102 is fixed to the discharge pipe 9 with the bolts 10. The groove 201 of the seat ring 2 and the groove of the seat ring 3 The grooves 301 are elastically urged by the rubber O-rings 12 of the Teflon seal 11 and the seat rings 2 are made of a material having a larger diameter H1 than the particles 13 of the chemical substance, (2B) of the small width (H2). ※ Note: It is disclosed by the contents of the first application.