KR200230080Y1 - Nitrogen gas auto supply device of cargo oil tank - Google Patents

Abstract

The present invention detects a slight pressure change caused by leakage of a nitrogen storage tank and automatically opens a pilot valve to supply a small amount of nitrogen gas, and when a large amount of nitrogen gas leaks, the main valve opens. The present invention relates to a nitrogen gas automatic supply device for a storage tank that is automatically shut off after supplementing the nitrogen gas inside the tank secondly.

Description

Nitrogen GAS AUTO SUPPLY DEVICE OF CARGO OIL TANK

The present invention relates to an automatic supply device for nitrogen gas in a storage tank, and more specifically, to detect a change in pressure caused by leakage of nitrogen gas in a storage tank, and to automatically supply a small amount of nitrogen gas to a primary supply. The present invention relates to a nitrogen gas automatic supply device for a storage tank that is secondarily supplied and shut off.

Typically, edible oils, foods, and the like that come into contact with the outside air inside the storage tank 100, and flammable liquids, gases, or gases (hereinafter, stored) that have a high risk of fire due to rotting with air. In order to prevent contact between the reservoir and air, nitrogen gas which is lighter than the reservoir is injected into the storage tank, preferably at the upper end of the reservoir, to form a nitrogen gas layer and form a constant pressure.

In this conventional technology, the nitrogen gas supply pipe is connected to the upper end of the storage tank and valves and gauges are continuously supplied to supply nitrogen gas more than necessary, resulting in high economic loss, and periodically checking the pressure gauge by the operator. There was a troublesome problem of opening and supplying and blocking nitrogen gas.

The present invention is to overcome the above-mentioned conventional problems, the object of the present invention is to detect the slight pressure change in the storage tank nitrogen gas is stored, the pilot valve is automatically opened and replenished quickly, a large amount of nitrogen gas In the event of leakage, the main valve is opened to replenish nitrogen gas in the tank and then automatically provide a nitrogen gas supply device for the storage tank that is automatically shut off.

1 is a front view showing a nitrogen gas automatic supply device for a storage tank according to an embodiment of the present invention.

Figure 2 is a cross-sectional view showing a central portion of the main portion of the automatic supply of nitrogen gas in the storage tank according to an embodiment of the present invention shown.

Figure 3 is an operating state diagram shown in the center of the open state of the automatic supply of nitrogen gas to the storage tank according to an embodiment of the present invention.

<Description of the symbols for the main parts of the drawings>

10: feeder 12: diamond frame

20: pilot valve 25: the first space

26: cylinder block 27: the second space part

30: Poppet 34: Gauge set

40: main valve 42: piston

50: first pressure unit 52: second pressure unit

100: storage tank

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. First, in describing the present invention, if a detailed description of a related known function or configuration may obscure the subject matter of the present invention, the detailed description thereof will be omitted.

1 is a front view showing a nitrogen gas automatic supply device for a storage tank according to an embodiment of the present invention. Referring to FIG. 1, the nitrogen gas automatic supply device of the storage tank according to the present invention is provided with a nitrogen gas supply device 10 at an upper end of the storage tank 100. The supply device 10 has a protrusion 48 formed on the upper portion of the main valve 40, the pilot valve 20 is coupled, the diaphragm 12 is installed at the upper end. The internal pressure of the tank is sensed through a sensing tube 14 coupled to one side of the lower end of the diaphragm 12. An inlet pipe 54 is connected to one side of the main valve 20 to introduce nitrogen gas, and a supply pipe 56 is connected to a lower end of the main valve 20 to be connected to the inside of the storage tank 100.

Figure 2 is a central cross-sectional view showing the main portion of the nitrogen gas automatic supply of the storage tank in accordance with an embodiment of the present invention cut in the center. As shown in FIG. 2, a first pressure part 50 to which the inlet pipe 54 is coupled to one side of the lower end of the main valve 40 is formed. The inner portion of the main valve 40, the space portion 43, and the 'b' shaped supply port 41 is connected to one side of the space portion 43 is formed, the supply port 41 There is a supply pipe 56 is coupled. A hole penetrating the center of the protrusion 48 is formed at an upper end of the space 43, and an opening and closing hole 45 connected to the first pressure part 50 is formed at the lower end. A hole 57 is formed in one side of the first pressure part 50, and the tubular body 58 is coupled to the outer rear side. The tubular body 58 is bent in a 'c' shape so that the other side is connected to the horizontal passage 23 formed on one side of the upper pilot valve (20).

The pilot valve 20 is formed in a hollow shape, a narrow hole is formed in the upper portion, a cylinder block 26 having a gauge seat 34 coupled therein, and a lower end coupled to the protrusion 48. do. The horizontal passage 23 is formed at one portion of the pilot valve 20, and a vertical passage 24 vertically connected to the middle portion of the horizontal passage 23 is downwardly formed, and a lower end portion is formed of 'b'. It is bent in shape and connected to the second pressure portion 52 formed in the coupling portion 48 through a hole. On the other side of the pilot valve 20, the supply passage 21 is formed in a '-' shape and the lower end is connected to the supply port 41. The cylinder block 26 has a space in which the lower part is opened inside An extension portion having a stepped portion is formed at the lower end, an end portion 28 is formed at the inner surface of the intermediate portion, and a hole through which the poppet bar 32 passes is formed at the upper portion. A connecting passage 22 is formed at one lower portion of the cylinder block 26 to be connected to the horizontal passage 23, and a connecting passage 29 is formed at the other upper portion thereof to be connected to the supply passage 21. The poppet 30 inserted into the cylinder block 26 has a concave indentation in the middle portion thereof, a top portion is formed in a cone shape, and an upper end thereof is formed so that the end of the poppet bar 32 protrudes as a rod. do. The poppet 30 has concave grooves formed at the corners of the upper cone and at the lower circumferential surface thereof, and the O-ring 38 is coupled thereto.

The gauge seat 34 has a protrusion 59 formed at an upper portion thereof, and a two-stage recessed groove is formed at the center of the protrusion 59. The protrusion 59 of the gauge seat 34 is inserted into and coupled to the lower portion of the cylinder block 26. The spring 36 is inserted into the concave groove formed in the lower inner side of the poppet 30 and is coalesced with the bottom surface of the inner concave groove of the gauge seat 34. The O-ring 38 is in contact with the end 28 and the lower portion thereof. The first space portion 25 is formed in the second space portion 27 is formed on the top. The connection passage 22 is connected to the first space portion 25, and the connection passage 29 is connected to the second space portion 27. The lower end of the gauge seat 34 is formed with a projection and the spring 49 is coupled, the spring 49 is inserted into the recess groove formed in the upper end of the piston 42 and is coalesced with the bottom surface. The lower end of the piston 42 is coupled to the bottom of the cone-shaped valve seat 44 formed narrower, the upper portion of the cone portion forms an inclined surface and the O-ring 46 is coupled to the contact portion with the piston 42.

The O-rings 38 and 46 are respectively inserted into the recessed grooves formed in the contact surface of each coupling portion to prevent nitrogen gas and pressure from leaking as shown in the drawing.

By the above configuration, the automatic supply of nitrogen gas of the storage tank according to the present invention operates as follows. When nitrogen gas is introduced into the storage tank 100 in an appropriate amount and nitrogen gas of a predetermined pressure is introduced through the inlet pipe 54 while the supply device 10 is closed as shown in FIG. 2, the first pressure unit 50 and The same pressure acts on the horizontal passage 23 connected to the tubular body 58, the first space portion 25, and the nitrogen gas introduced into the second pressure portion 52. At this time, the pressure area acting on the upper end surface of the piston 42 in the second pressure part 52 together with the elastic force of the spring 49 acts on the lower end surface of the valve seat 44 in the first pressure part 50. Since the pressure area is wider, the pressing force acts downward and the O-ring 46 of the piston 42 blocks the opening / closing hole 45.

When a small amount of nitrogen gas stored in the storage tank 100 leaks and the internal pressure of the tank falls, the pressure of the sensing tube 14 is lowered, and the operation plate of the diaphragm 12 sags downward to open the poppet bar 32. When pressed, poppet 30 is lowered. In addition, the O-ring 38 is separated from the end 28, the nitrogen gas of the first space portion 25 is introduced into the second space portion 27, the connection passage 29, the supply passage 21 and supply A small amount of nitrogen gas is supplied and replenished into the storage tank 100 through the sphere 41. When the nitrogen gas is supplied and the pressure in the tank becomes constant, the operation plate and the poppet 32 are raised and the valve is closed. At this time, when the leakage amount of the storage tank 100 increases, nitrogen gas is continuously introduced as described above, and when the flow of nitrogen gas is generated and supplied to the horizontal passage 23, the vertical passage 24 is carried out as in Bernoulli's principle. And nitrogen gas from the second pressure part 52 flows into the connecting passage 22 so that the pressure drops in the second pressure part 52, the piston 42 is raised and the opening / closing hole 45 is opened to supply the opening. Nitrogen gas flows into (41).

Conversely, when a proper amount of nitrogen gas flows into the storage tank 100, the operating plate of the diaphragm 12 is restored to its original shape, and the poppet 30 is raised by the restoring force of the spring 36, so that the O-ring 38 is end portion 28. ), The nitrogen gas is charged again in the second space portion 52 and the pressure is applied to the piston 42 so that the O-ring 46 blocks the opening and closing hole 45.

As described above, the present invention detects a small pressure difference when a small amount of nitrogen gas leaks into the storage tank 100 and automatically replenishes nitrogen gas, and when a large amount of nitrogen gas leaks, the main valve 40 It is opened and operated to supply nitrogen gas quickly.

As described above, the automatic supply of nitrogen gas of the storage tank according to the present invention detects a slight change in the pressure inside the storage tank in which nitrogen gas is stored and is automatically replenished, so that the pressure in the tank is kept constant and In addition to preventing the danger, there is an effect to prevent the leakage of toxic gas stored inside.

In addition, the present invention has the advantage of preventing the economic loss by preventing the excess of nitrogen gas is wasted because the valve is automatically shut off after the nitrogen gas is supplied and the appropriate amount of nitrogen gas is introduced.

Claims (2)

One side of the diaphragm is coupled to the sensing tube connected to the upper end of the storage tank, the lower portion of the diaphragm is installed pilot valve connected to the inlet pipe, the lower portion of the pilot valve is connected to the inlet pipe and the inside of the storage tank In the nitrogen gas supply device is coupled to the main valve is coupled to supply and shut off nitrogen gas in the storage tank; The main valve 40 has an opening and closing hole 45 connecting the first pressure part 50 connected to the inlet pipe 54 and the space part 43 formed on the first pressure part 50. A piston 42 which opens and closes the opening and closing hole 45 in the space portion 43, and the supply pipe 56 is coupled to a supply port 41 connected to the space portion 43; The pilot valve 20 has a cylinder block 26 and a gauge seat 34 coupled therein to be embedded therein, and both sides have a horizontal passage 23, a supply passage 21, and the horizontal passage 23. A vertical passage 24 is formed to connect the second pressure portion 52 formed between the gauge seat 34 and the piston 42; The tubular body 58 has one side part connected with the first pressure part 50 and the other part connected with the horizontal passage 23; Inside the cylinder block 26 and the gauge seat 34, a poppet 30 supported by a spring 36 is embedded, and a poppet bar 32 formed at an upper end of the poppet 30 protrudes upwards. It is connected to the operating plate of the diaphragm 12, the poppet 30 is connected to the inside of the cylinder block 26, the connecting passage 22 and the supply passage 21 connected to the horizontal passage 23 Nitrogen gas automatic supply of the storage tank, characterized in that configured to open and close the connection passage (29) connected with. The method of claim 1; An end portion 28 is formed inside the cylinder block 26, and a first space portion connected to the connection passage 22 while the O-ring 38 coupled to the poppet 30 is detached from the end portion 28. (25) and the nitrogen gas automatic supply of the storage tank, characterized in that the second space portion 27 is connected to the connection passage 29 is formed.