KR-20260065948-A - Boost pump and low-temperature fluid supply system

Abstract

In a booster pump and a low-temperature fluid supply system, the system comprises a casing for storing a low-temperature fluid, a cylinder disposed inside the casing and having a compression chamber, with its upper vertical portion supported on the upper portion of the casing, a piston supported inside the cylinder to move freely along the vertical direction and compressing the low-temperature fluid sucked into the compression chamber, and a discharge pipe having a bending portion that bends in the horizontal direction, with its lower vertical portion communicating with the compression chamber and its upper portion supported on the upper portion of the casing.

Inventors

• 아사이 히데아키
• 하라다 모토시
• 오가와 신지
• 마츠바야시 도시키

Assignees

• 에무에이치아이소류숀테크노로지즈 가부시키가이샤

Dates

Publication Date

20260511

Application Date

20241008

Priority Date

20231030

Claims (11)

1. 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 discharge pipe having a bending portion that bends in the horizontal direction, a lower end in the vertical direction that communicates with the compression chamber, and an upper end that is supported on the upper part of the casing.
2. In Article 1, The above discharge pipe has a lower straight section following a vertical direction on the lower side and an upper straight section following a vertical direction on the upper side, and the above bend is formed between the lower straight section and the upper straight section, a booster pump.
3. In Article 2, A booster pump in which the lower straight section and the upper straight section are in the same horizontal position.
4. In any one of paragraphs 1 to 3, The above-mentioned bend is a booster pump that bends toward the cylinder side.
5. In Article 4, The above-mentioned bend is a booster pump that bends toward a position offset in the horizontal direction from the center of the cylinder.
6. In Article 1, The above-mentioned bend is a booster pump having a bend that bends in a horizontal direction.
7. In Article 1, A booster pump, wherein the cylinder is positioned at a location offset in one direction in the radial direction from the center of the casing, and the discharge pipe is positioned at a location offset in the other direction in the radial direction from the center of the casing.
8. In Article 1, The above discharge pipe is a booster pump, the lower end of which is connected to the cylinder by a cone and thread joint.
9. In Article 8, A booster pump, wherein the discharge pipe comprises a first discharge pipe and a second discharge pipe, the first discharge pipe has the bend and its lower end is connected to one end of an elbow block by a first nut, and the second discharge pipe has its one end connected to the other end of the elbow block by a second nut and its other end connected to the cylinder by a third nut.
10. In Article 9, The first nut, the second nut, and the third nut are each a booster pump in which a rotation stop jig is formed.
11. A compression device for compressing a low-temperature fluid having a booster pump as described in claim 1, and An evaporator that vaporizes liquid hydrogen 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.

Description

Boost pump and low-temperature fluid supply system The present disclosure relates to a booster pump and a low-temperature fluid supply system. 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 the hydrogen supply system of the present embodiment. FIG. 2 is a cross-sectional view showing a compression device of the present embodiment. FIG. 3 is a horizontal cross-sectional view (cross-section III-III of FIG. 2) showing the booster pump of the present embodiment. Figure 4 is a cross-sectional view showing the main parts of a booster pump. Figure 5 is a cross-sectional view showing the connection between the cylinder and the discharge pipe. Figure 6 is a cross-sectional view taken along line VI-VI of Figure 5. Fig. 7 is a cross-sectional view of line VIII-VIII of Fig. 5. FIG. 8 is a cross-sectional view of the main part of a booster pump showing a first modified example of a discharge pipe. FIG. 9 is a cross-sectional view of the main part of a booster pump showing a second modified example of the discharge piping. 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. Hydrogen Supply System FIG. 1 is a schematic diagram showing the overall configuration of the hydrogen supply system of the present 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 the compression device of the present embodiment, and FIG. 3 is a horizontal cross-sectional view (cross-III of FIG. 2) showing the booster pump of the present embodiment. As shown in FIG. 2, the compression device (21) has a driving unit (31) and a booster