KR900010003Y1 - Inflation pump for liquified gas - Google Patents

Abstract

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Description

Cryogenic Liquefied Gas Charge Pump

1 is a cross-sectional view of a liquefied gas filling pump according to the present invention.

2 is a cross-sectional view of a conventional liquefied gas filling pump.

* Explanation of symbols for main parts of the drawings

1: liquefied gas filling pump 2: outer cylinder

4: vacuum chamber 5: ball valve

6: cylinder chamber 7: suction hole

9 pump body 15 inlet hole

17: check valve 20: valve chamber

25: discharge hole 30: bullet spring

The present invention is a liquefied gas filling pump, that is, by constituting the liquefied gas of the ultra-low temperature atmosphere into the vacuum chamber formed for the cylinder chamber of the charging pump to be discharged, the liquefied gas in the cryogenic state introduced into the vacuum chamber The present invention relates to an ultra low temperature liquefied gas filling pump which allows the body of the pump to be precooled, shortens the normal cooling time of the filling pump and increases the cooling effect.

The pump which supplies the cryogenic industrial industrial gas to a container in a separate place from the past until now has a structure as shown in FIG. 3, and causes the fault mentioned later.

In other words, the pump (4 ') is formed between the inner body (14') and the outer cylinder (2 ') of the pump (1') to form a vacuum chamber (4 ') forming a space in order to achieve a heat insulating effect due to an external temperature change. When the piston 12 'in 1' is operated, the liquefied gas of the ultra low temperature state sucked through the suction pipe 38 'connected to the storage tank (not shown) is connected to the suction pipe 38'. '), A suction passage 3' formed at a suction valve 26 'mounted at one end of the suction chamber 16', and a suction passage 3 'opened when the suction valve 26' is operated. And ball valve (5 ') contraction and ball valve (5') when the check valve (17 ') is operated by the cylinder chamber (6') and the suction hole (7 ') which is in communication with the cylinder chamber (6'). The check valve chamber 20 'communicating with the cylinder chamber 6' and the discharge port 24 'communicating with the check valve chamber 20' while opening the suction hole 7 'by retraction. And the connector 34 'mounted on one side of the pump 1'. In filling the gas into a separate filling container (not shown) through the discharge pipe 44 'to be connected, the vacuum chamber 4' formed in the body 9 'of the pump 1' causes the outside The cryogenic liquid gas is maintained at a low temperature at all times in the cylinder chamber 6 'and suction chamber 16' devoted to the vacuum chamber 4 'by the thermal barrier effect. 6 ') reciprocating the piston 12', ie head movement, because the pressure in the cylinder chamber 6 'is relatively increased when the gas is converted into the vaporized state due to the temperature change to the high temperature. It is well-known that it is in order to prevent that it inhibits and makes smooth gas filling work lower efficiency.

However, since the liquid gas filling pump is installed and operated outdoors, even if a vacuum chamber is formed to block the change in the rising temperature transmitted from the outside, a full thermal barrier effect cannot be expected.

Therefore, before the filling pump is operated, the body of the pump is cooled to the same or lower temperature than the cryogenic liquid gas temperature by a separate cooling means, and then the cryogenic liquid gas sucked into the cylinder of the pump body is stored in the first storage tank. The gas filling operation is carried out while maintaining the same temperature, and unnecessary time and labor due to the cooling operation of the pump are consumed, and if the cooling operation of the pump body is not good, the gas filling operation is performed in the pump body. Cavitation occurs because the cryogenic liquid gas that is sucked is converted into the vaporized state by the temperature rise of the pump body.

As a result, the reciprocating operation of the charge pump is deteriorated, and noise and vibration are so severe that the gas filling operation cannot be performed efficiently. Also, the occurrence of cavitation in the charge pump damages the charge pump itself. It is a factor that shortens the life of the pump. Especially, when vaporization gas, which is the cause of cavitation, flows into the first gas storage tank through the return passage in the pump, it increases the pressure of the gas storage tank in the cryogenic state. At this time, the pressure was to operate the safety valve installed in the storage tank, the gas in the vaporized state is discharged into the atmosphere through the safety valve, there was a drawback that the amount of unnecessary loss of liquid gas consumption is not small.

The present invention solves all the problems caused by the conventional liquid gas filling pump. First, the inside of the vacuum chamber using the cryogenic liquid gas, which is sucked into the cylinder interior from the storage tank in the cryogenic atmosphere, as well as cooling the pump, By allowing the gas to flow into the tank and storing it while being discharged, it provides the advantage of shortening the cooling time of the pump body, and since the cryogenic liquid gas which is continuously sucked is placed around the inner cylinder forming the cylinder chamber, Even if there is a change due to the temperature rise to the outside, the cryogenic liquid gas always flows inside the pump body, so that it maintains the liquid gas temperature in the gas tank so that the liquid gas in the cylinder does not become vaporized. Benefits, which allows the cavitation phenomenon in the pump to To provide a benefit to the benefit and the gas filling operation can quickly be performed so that values are generated for this purpose.

In other words, in order to achieve the above object, the present invention has a cylinder chamber in which a piston is inserted and reciprocated on one side and a suction chamber is formed on the other side by placing and mounting a suction valve having a suction path in an intermediate portion. And a pump body made up of an outer cylinder which forms a vacuum chamber forming a space therebetween, while the inner cylinder is integrally formed, and an auxiliary body formed with a suction port and a return path communicating with the suction chamber to close one end of the pump body. In the ultra low temperature liquid gas filling pump, the pump body has one side extending from the inner cylinder adjacent to the suction valve and protruding through the vacuum chamber and the outer cylinder to the outside and communicating with the cylinder chamber inside. On the other side, a check valve having a discharge port is provided and a check valve adjacent to the suction hole. On the lower circumferential wall of the lower part, the inlet hole which is normally closed with the suction hole by the ball valve is laid. On both sides of the upper circumferential wall, the outlet hole is laid so that the vacuum chamber and the valve chamber communicate with each other. By discharging, if necessary, the low temperature liquid gas is configured to precool the pump body.

Hereinafter, the technical configuration and effect of the present invention based on the accompanying drawings in detail.

As shown in FIG. 1, the cylinder chamber 6 in which the piston 12 is inserted and reciprocally operated by inserting and installing the suction valve 26 in which the suction path 3 was formed in the middle part is installed. 2) the inner cylinder 14 on which the suction chamber 16 is formed, and the outer cylinder 2 integral with the inner cylinder 14 and having a predetermined gap therebetween, and forming a vacuum chamber 4 therebetween. For filling the cryogenic liquid gas formed from the auxiliary body 8 formed by the pump body 9 and the return body 28 returning to the one side of the pump body 9 configured to close one side of the pump body 9, respectively. In the pump (1), on one side of the pump body (9), the suction hole is closed as a ball valve (5) which is integrally extended from the inner cylinder (14) adjacent to the suction valve (26) and urged. On the outside, the check valve 17 which holds the discharge port 10 formed in connection with the valve chamber 20 outside, respectively. It is installed, and one side of the main wall adjacent to the suction hole 7 installed in the check valve 17, normally closed by the ball valve 5 as the suction hole (7) and the ball valve by the liquid gas pressure ( When 5) moves upward, a gas inlet hole 15 which is in contact with the suction hole 7 is laid so that the vacuum chamber 4 communicates with the valve chamber 20 by the gas inlet hole 15.

On both sides of the upper circumferential wall of the inflow hole 15, the liquid gas discharge hole 25 communicating with the valve chamber 20 and the vacuum chamber 4 is laid, and the liquid gas pressure generated during the reciprocating operation of the piston 12 is established. The ball valve 5 is sucked from the storage tank (not shown) by alternately closing or opening the suction hole 7, the liquid gas inlet hole 15, and the discharge hole 25 by a car. The cryogenic liquid gas causes the inflow door to flow into the vacuum chamber 4, and then discharges it so that the cryogenic liquid gas cools the pump body 9.

In the drawings, reference numeral 36 denotes a suction valve during operation, 56 denotes a spring, 46 denotes a suction valve head disc, 38 denotes a suction pipe connected to a storage tank, and 34 denotes a check valve. A connector inserted into the outlet port 10 side of the valve 17, 24 is a discharge port formed in the connector, 44 is a discharge pipe connected to the connector 34, 22 is a seal packing will be.

By such a configuration, the liquid gas stored in the cryogenic liquid gas storage tank (not shown) in the cryogenic state is filled into a separate container, and the filling pump 1 of the present invention as shown in FIG. The gas stored in the storage tank by the reverse suction operation during the reciprocating operation of the piston 12 in the chamber 6 is sucked into the suction chamber 16 via the suction pipe 38 and the suction port 18 continuously connected to the storage tank. In addition, the suction valve 26 closing the suction path 3 by the normal force of the spring 56 also operates in the direction of the arrow A by the suction (reverse) operation of the piston 12. The head disc 46 opens the suction passage 3 so that the liquid gas in the suction chamber 16 is sucked into the cylinder chamber 6.

On the contrary, when the piston 12 moves forward, the suction valve 26 opened up to that time automatically returns to its original position due to the gas pressure and the return force of the spring 56 caused by the forward operation of the piston 12, Block (3). On the other hand, the liquid gas sucked into the cylinder chamber 6 is intended to flow into the valve chamber 20 side through the suction hole 7 of the check valve 17 installed on one side by the pressure force by the piston 12 forward operation. do.

That is, the liquid gas pressure in the cylinder chamber 6 presses the ball valve 5 which normally closes the suction hole 7 and the gas inlet hole 15 by the negative force of the ball shot spring 30 at the same time. At this time, the ball valve (5) that does not win the gas pressure is moved to the first dashed line position (P) of FIG. 1 while pushing the spring 30 in the upper portion, so that the vacuum chamber 4 and the valve chamber 20 interlock with each other. While closing the gas discharge hole 25 formed in the circumferential wall of the valve chamber 20, the suction hole 7 and the weakened gas inlet hole 15, which were closed until then, are opened to open the cylinder 6. The cryogenic liquid gas flows into the vacuum chamber 4 via the open suction hole 7, the valve chamber 20, and the inlet hole 15, and flows in the direction of the arrow in FIG. 1 while surrounding the inner cylinder 14. It serves as a refrigerant for gradually cooling the pump body (9). When the piston 12 performs the reverse suction operation, the pressure in the cylinder chamber 6 is weakened due to the introduction of a new gas into the cylinder chamber 6 due to the opening of the valve 26 as in the above example. The ball valve 5 which closed the discharge hole 25 in the one-dot chain position position P by the automatic return to the original state by the negative force of the ball spring 30, and the inlet hole 7 and the inflow Since the ball 15 is closed and the discharge hole 25 is opened instead, the liquefied gas filled in the vacuum chamber 4 flows into the valve chamber 20 through the discharge hole 25 which is opened, and then the discharge path. It is discharged to the outside via (24).

The filling operation of the liquefied gas continues continuously, and the liquid gas sucked into the cylinder chamber 6 flows into the vacuum chamber 4 through the suction hole 7 and the gas inlet hole 15 and flows therein. (9) is cooled, and is then supplied to another filling place connected to the discharge pipe 44 through the discharge hole 25, the valve chamber 20, and the discharge passage 24.

Thus, the cooling of the pump body 9 by the liquefied gas at the same time causes a separate cooling means from the outside to cause the cooling effect and synergy effect of cooling the exterior of the body 9, thereby causing the pump body 9 to be externally There is an effect that it becomes a factor to shorten the cooling time.

In addition, since the cryogenic liquid gas continues to flow into the vacuum chamber 4 to cool the pump body 9 even after the cooling process by the external cooling means is stopped, the temperature change in the pump body 9 due to the external temperature rise. Since the filling operation can be performed while maintaining the temperature of the first cryogenic liquid gas at almost all times, the pump body 9 'is conventionally cooled down to a predetermined temperature by a separate cooling means. In this case, only the vacuum chamber 4 ′ completely eliminates the phenomenon of cavitation in the fuselage, which is often caused by the external temperature change not reaching the cryogenic liquid gas.

Therefore, there is an excellent effect that the cryogenic liquid gas filling operation can be smoothly performed at all times.

Claims (1)

By placing and installing the suction valve 26 formed with the suction passage 3 in the middle portion, the piston chamber 12 is inserted at one side and the cylinder chamber 6 reciprocating is operated at the other side. A pump body 9 formed from an inner cylinder 14 to be formed, and an outer cylinder 2 integral with the inner cylinder and having a predetermined gap therebetween, and forming a vacuum chamber 4 therebetween; In a pump composed of an inlet body (18) which is fitted to close one end of the pump body (9) and communicates with a suction chamber and has a return passage (28), respectively, on one side of the pump body (9) Integrally extending from the inner cylinder 14 to protrude through the vacuum chamber 4 and the outer cylinder 2, and installs a check valve 17 for holding the suction hole 7 and the discharge port 10, respectively; On one side wall adjacent to the suction hole perforated by the check valve, the ball valve 5 normally urged as a ball spring 30 is attached to the ball valve 5. The liquid gas inlet hole 15 is closed as the suction hole and opened, and the liquid gas inlet hole 15 communicating with the suction hole is in contact with the vacuum chamber 4, and the discharge hole that is opened and closed by a ball valve on the upper wall of the liquid gas inlet hole ( 25) is installed to allow the vacuum chamber 4 and the valve chamber 20 to communicate with each other, so that the cryogenic liquefied gas flows into the vacuum chamber and flows therein so that the pump body 9 is always cooled. Cryogenic liquefied gas charge pump characterized in that.