KR-20260066789-A - Booster pump and low-temperature fluid supply system, method of discharging low-temperature fluid in a booster pump

KR20260066789AKR 20260066789 AKR20260066789 AKR 20260066789AKR-20260066789-A

Abstract

A booster pump and a low-temperature fluid supply system, and a method for discharging low-temperature fluid in a booster pump, comprises a casing for storing low-temperature fluid, a cylinder disposed inside the casing and having a compression chamber and having a vertical upper end supported on the upper part of the casing, a piston supported to move freely along the vertical direction inside the cylinder and compressing the low-temperature fluid sucked into the compression chamber, and a drain pipe having one end supported on the upper part of the casing and the other end extending to the lower part of the casing.

Inventors

가와노 신
하라다 모토시
기하라 유이치

Assignees

에무에이치아이소류숀테크노로지즈 가부시키가이샤

Dates

Publication Date: 20260512
Application Date: 20241025
Priority Date: 20231025

Claims (10)

A casing for storing low-temperature fluid, and A cylinder disposed inside the above casing and having a compression chamber, with its upper end in the vertical direction supported on the upper part of the above casing, and A piston supported to move freely along the vertical direction inside the cylinder and compressing a low-temperature fluid sucked into the compression chamber, and A booster pump having a drain pipe, one end of which is supported on the upper part of the casing and the other end of which extends to the lower part of the casing.
In Article 1, The above casing is a booster pump having a casing body (51a) which is an insulating structure having a bottom and a tubular shape, and a cover portion that closes the upper part of the casing body (51a), wherein one end of the drain pipe is supported by penetrating the cover portion.
In Article 1 or Article 2, The above drain pipe is a booster pump, the other end of which is bent and arranged to follow the bottom surface of the casing.
In Paragraph 3, The above drain pipe is a booster pump having a straight section arranged along a vertical direction inside the casing, a curved section connected to the lower end of the straight section, and an opening arranged at the tip of the curved section and having an opening surface inclined with respect to the axial direction.
In Article 1, The above drain piping is a booster pump in which a drain valve is formed on the outside of the casing to open and close the flow path.
In Article 1, A booster pump having a pressurizing pipe supported on the upper part of the casing and capable of pressurizing by supplying gas from the outside of the casing to the inside.
In Article 6, The above pressurized piping is a booster pump that supplies a gas heated from a low-temperature fluid of the same type as the low-temperature fluid stored in the casing to the interior of the casing.
In Article 1, The above casing is a booster pump having a curved shape with a bottom surface that is convex toward the vertical downward direction.
A compression device for compressing a low-temperature fluid having a booster pump as described in claim 1, and An evaporator that vaporizes a low-temperature fluid compressed by the above-mentioned compression device, and A low-temperature fluid supply system having a dispenser that supplies gas vaporized by the above-mentioned evaporation device.
A casing for storing low-temperature fluid, and A cylinder disposed inside the above casing and having a compression chamber, with its upper end in the vertical direction supported on the upper part of the above casing, and A booster pump having a piston that is supported to move freely along the vertical direction inside the cylinder and compresses a low-temperature fluid sucked into the compression chamber, A step of reciprocating the piston inside the cylinder to discharge high-pressure low-temperature fluid pressurized in the compression chamber to the outside, and A step of stopping the reciprocating movement of the piston when it becomes impossible to draw low-temperature fluid into the compression chamber, and A step of discharging cold fluid remaining in the casing to the outside using a drain pipe, one end of which is supported on the upper part of the casing and the other end of which extends to the bottom of the casing. A method for discharging low-temperature fluid in a booster pump having

Description

Booster pump and low-temperature fluid supply system, method of discharging low-temperature fluid in a booster pump The present disclosure relates to a booster pump, a low-temperature fluid supply system, and a method for discharging a low-temperature fluid in a booster pump. As a system for realizing carbon neutrality, it is considered to use hydrogen gas as fuel. Hydrogen is stored in a tank in the form of liquid hydrogen, and the liquid hydrogen stored in the tank is vaporized to become hydrogen gas, which is then supplied to, for example, a fuel cell or a hydrogen engine. The hydrogen supply system is equipped with a booster pump that boosts the liquid hydrogen. As for the booster pump, there is, for example, the technology described in Patent Document 1. FIG. 1 is a schematic diagram showing the overall configuration of a hydrogen supply system of a first embodiment. FIG. 2 is a cross-sectional view showing a compression device of a first embodiment. FIG. 3 is a horizontal cross-sectional view (cross-section III-III of FIG. 2) showing a booster pump of the first embodiment. FIG. 4 is a longitudinal cross-sectional view showing the lower part of a booster pump of the second embodiment. Figure 5 is a schematic diagram showing the tip of the drain pipe. FIG. 6 is a lower cross-sectional view showing a booster pump of the first modified example. FIG. 7 is a lower cross-sectional view showing a booster pump of the second modified example. Fig. 8 is a cross-sectional view of line VIII-VIII of Fig. 7. Preferred embodiments of the present disclosure will be described in detail below with reference to the drawings. Furthermore, the present disclosure is not limited by these embodiments, and if there are multiple embodiments, it includes combining each embodiment. In addition, the components in the embodiments include those that can be easily conceived by a person skilled in the art, substantially identical ones, and so-called equivalent ones. [First Embodiment] Hydrogen Supply System FIG. 1 is a schematic diagram showing the overall configuration of a hydrogen supply system of a first embodiment. As shown in FIG. 1, the hydrogen supply system (low-temperature fluid supply system) (10) supplies liquid hydrogen stored in a container (11) to the power source of a vehicle (12) as hydrogen gas at a predetermined pressure. Here, the power source is, for example, a fuel cell or a hydrogen engine, and is mounted on the vehicle (12). The hydrogen supply system (10) is, for example, a so-called hydrogen station that supplies hydrogen gas, which is fuel, to the power source of the vehicle (12). However, the hydrogen supply system (10) is not limited to supplying hydrogen gas to the power source of the vehicle (12), but also includes supplying hydrogen gas to a tank of a trailer for transporting hydrogen. Furthermore, the hydrogen supply system (10) is not limited to hydrogen, but operates in the same way when compressing and supplying a low-temperature fluid (for example, liquid hydrogen, liquid nitrogen, liquid oxygen, liquid carbon dioxide, liquid natural gas, liquid propane gas, etc.). The hydrogen supply system (10) has a compression device (21), an evaporation device (22), and a dispenser (23). The compression device (21) compresses liquid hydrogen (low-temperature fluid) supplied from a container (11) to a predetermined high pressure (high-pressure state). The evaporation device (22) generates hydrogen gas by vaporizing the high-pressure liquid hydrogen compressed by the compression device (21). The dispenser (23) charges the hydrogen gas generated by the evaporation device (22) into the power source of the vehicle (12). Additionally, the compression device (21) compresses the liquid hydrogen stored in the container (11) to a predetermined high pressure, but is not limited to this configuration. The compression device (21) has a drive unit (31) and a boost pump (32). The drive unit (31), although not shown, has a drive motor and a drive mechanism. The drive motor is an electric motor that can be driven by power supplied from an external source. The rotational speed of the drive motor is controlled by an inverter (not shown). The drive mechanism has a crank mechanism and converts the rotational power of the drive motor into linear reciprocating power. The drive motor transmits rotational power to the drive mechanism, and the drive mechanism transmits linear reciprocating power to the boost pump (32). The boost pump (32) is operated by the drive unit (31) and compresses liquid hydrogen. Additionally, the drive unit (31) may have a reduction gear between the drive motor and the drive mechanism. Compression device FIG. 2 is a longitudinal cross-sectional view showing a compression device of the first embodiment, and FIG. 3 is a horizontal cross-sectional view (cross-III of FIG. 2) showing a booster pump of the first embodiment. As shown in FIG. 2, the compression device (21) has a driving unit (31) and a booster pump (3