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Liquid output pump suitable for operating in low-temperature environment and vehicle-mounted liquefied natural gas (LNG) bottle

A low-temperature environment, liquid pump technology, applied in the direction of pumps, motor vehicles, piston pumps, etc., can solve the problem that the liquid pump is not suitable

Pending Publication Date: 2020-10-30
XIAN AEROSPACE YUANZHENG FLUID CONTROL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Conventional pumps are not suitable for low-temperature environments (such as sub-zero), such as vehicle-mounted LNG cryogenic insulated gas cylinders, whose internal temperature is -196°C

Method used

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  • Liquid output pump suitable for operating in low-temperature environment and vehicle-mounted liquefied natural gas (LNG) bottle
  • Liquid output pump suitable for operating in low-temperature environment and vehicle-mounted liquefied natural gas (LNG) bottle
  • Liquid output pump suitable for operating in low-temperature environment and vehicle-mounted liquefied natural gas (LNG) bottle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] This embodiment is a specific liquid outlet pump, such as figure 1 As shown, the liquid outlet pump is mainly composed of hydraulic cylinder 1, cylinder liner 5, installation sleeve 12, piston cylinder 8, power piston 2, piston rod 3, working piston 9, liquid inlet check valve 10, liquid outlet check valve 11 and liquid outlet pipe 7 are assembled;

[0035] When working, the hydraulic pressure of the power end A drives the power piston 2 to reciprocate in the hydraulic cylinder 1, and the power piston 2 drives the piston rod 3 to drive the working piston 9 to work;

[0036] When the working piston 9 moves towards the hydraulic cylinder 1, a negative pressure is formed in the piston cylinder 8 at the working end C, and the negative pressure makes the liquid outlet check valve 10 close, and at the same time makes the liquid inlet check valve 11 open to suck LNG into the piston cylinder 8 ;

[0037] When the working piston 9 moves away from the direction of the hydraulic...

Embodiment 2

[0046] This embodiment is a gas cylinder equipped with a liquid outlet pump 13 of the present invention. refer to figure 2 As shown, the gas cylinder body includes a gas cylinder body 14 and a gas cylinder liner 16, a vacuum interlayer 15 is arranged between the two, and the gas cylinder body 14 and the gas cylinder liner 16 are fixed by the gas cylinder distributor 17 and extended. The 18 ends of the sliding support slide to prevent the deformation of the cylinder inner liner 4 to produce stress when the temperature changes.

[0047] The installation sleeve 12 is welded to its gas cylinder body 14 and the gas cylinder liner 16 respectively, and is formed at 29° to the horizontal axis of the gas cylinder; the liquid outlet pump 1 penetrates into the installation sleeve, and the first flange on the liquid outlet pump 13 is connected to the installation sleeve. The end faces of the sleeve pipe 12 are connected with bolts. When installing, ensure the minimum distance S=80mm be...

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Abstract

The invention discloses a liquid output pump suitable for working in a low-temperature environment and a vehicle-mounted liquefied natural gas (LNG) bottle. The disclosed liquid output pump suitable for operating in the low-temperature environment comprises a hydraulic cylinder, a cylinder sleeve and a piston cylinder which are arranged in the axial direction of the liquid output pump; a power piston is arranged in the hydraulic cylinder; the power piston is connected with a piston rod; the piston rod passes through the cylinder sleeved to the piston cylinder, and the end part of the piston rod located in the piston cylinder is provided with a working piston; the piston cylinder is provided with a liquid inlet and a liquid outlet; the liquid inlet and the liquid outlet are each equipped with a valve; the outer diameter of the cylinder sleeve is smaller than that of the hydraulic cylinder and that of the piston cylinder; a mounting casing pipe is further arranged between the hydraulic cylinder and the piston cylinder, and the cylinder sleeve is located in the mounting casing pipe; a heat-insulating cavity is formed between the mounting casing pipe and the cylinder sleeve; and the liquid outlet is connected with a liquid output pipe. The disclosed vehicle-mounted LNG cylinder is a cylinder equipped with the liquid output pump of the invention. By means of the heat-insulating cavity, the liquid output pump of the invention makes air generate a temperature gradient large enough in the gas cylinder to realize heat insulation; and when the liquid output pump used for the gas cylinder, working control on the gas cylinder is more simple and convenient.

Description

technical field [0001] The invention relates to a liquid outlet pump, in particular to a liquid outlet pump operated in a low-temperature environment and a vehicle-mounted LNG cylinder equipped with the liquid outlet pump. Background technique [0002] Conventional pumps are not suitable for low-temperature environments (such as sub-zero), such as vehicle-mounted LNG cryogenic insulated gas cylinders, whose internal temperature is -196°C. Vehicle-mounted LNG low-temperature insulated gas cylinders (hereinafter referred to as gas cylinders) are used to store LNG vehicle fuel. When the liquid needs to be discharged, the pressure of the gas phase space in the gas cylinder is used to press the LNG out to the heat exchanger. After the LNG is vaporized in the heat exchanger Enter the buffer tank, and then enter the car engine through the voltage regulator. Contents of the invention [0003] Aiming at the defects or deficiencies of the prior art, the present invention provides a...

Claims

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Application Information

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IPC IPC(8): F04B9/105F02M21/02F17C1/00F17C13/00
CPCF02M21/0215F02M21/0221F02M21/0245F04B9/105F17C1/00F17C13/00F17C2201/0109F17C2201/035F17C2270/0178Y02T10/30
Inventor 李芳霞李峰王建京韩利李珍珍郭茜茹何荣
Owner XIAN AEROSPACE YUANZHENG FLUID CONTROL
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