CN203868689U

CN203868689U - LNG (liquefied natural gas) dispenser with automatic return gas metering function

Info

Publication number: CN203868689U
Application number: CN201320859031.3U
Authority: CN
Inventors: 邹慧; 许俊虎; 刘佳; 殷晓东
Original assignee: Jiangyin Furen High Tech Co Ltd
Current assignee: Jiangyin Furen High Tech Co Ltd
Priority date: 2013-12-25
Filing date: 2013-12-25
Publication date: 2014-10-08
Anticipated expiration: 2023-12-25

Abstract

The utility model discloses a LNG (liquefied natural gas) dispenser with an automatic return gas metering function. The LNG dispenser comprises a first pressure transmitter, a pressure meter, a first pneumatic stop valve, a first check valve, a first thermal-insulating mass flow meter, a first stop valve, a second pneumatic stop valve, a second pressure transmitter, a second check valve, a second thermal-insulating mass flow meter, a second stop valve, a third pneumatic stop valve, a fourth check valve and a control system, wherein the first pressure transmitter, the pressure meter, the first pneumatic stop valve, the first check valve, the first thermal-insulating mass flow meter and the first stop valve are arranged on a gas filling gun pipeline sequentially, and the first pneumatic stop valve and the first check valve are connected in parallel; the second pneumatic stop valve, the second pressure transmitter, the second check valve, the second thermal-insulating mass flow meter and the second stop valve are arranged on a gas return gun pipeline sequentially; and the fourth check valve is arranged on a gas filling gun return port pipeline. According to the LNG dispenser, one pressure transmitter, one pneumatic stop valve and one thermal-insulating mass flow meter are added on a gas return gun pipeline, and the control system is used for collecting analog or digital signals of the pressure transmitter, so that the valves can be automatically opened for gas return when the pressure of a cylinder is larger than or equal to a preset gas return pressure value; and when the pressure of the cylinder is smaller than the preset gas return pressure value, the valves are automatically closed, and the gas return function is stopped.

Description

A kind of LNG filling machine with automatic air return function of measuring

Technical field

The utility model relates to LNG filling machine measurement technique field, is specifically related to a kind of LNG filling machine with automatic air return function of measuring.

Background technique

Along with the degree of industrial automation is more and more higher, working efficiency is also improving fast, and various intelligent sensors are also fast-developing.By processing the information of intelligent sensor, LNG filling machine is intellectuality and facilitation more.

Existing LNG filling machine, as shown in Figure 1, is only provided with safety check No. two on its return-air gun barrel road, and its air-exhaust technology is by operator, to observe the pressure gauge of gas cylinder, by operator, determines whether carry out return-air; In return-air process, need operator's Real Time Observation cylinder pressure gauge, reach after requirement, manually take off muffler; In LNG aerating process, storage pressure raises, and needs operator to suspend aerating, manually plugs muffler and carries out return-air, takes off muffler after return-air, continues LNG aerating.

Model utility content

The utility model, for deficiency of the prior art, provides a kind of LNG filling machine with automatic air return function of measuring.

The utility model is to realize by following technological scheme: a kind of LNG filling machine with automatic air return function of measuring, comprises and be located at successively a pneumatic cut-out stop valve of a pressure transmitter connecing on air filling gun pipeline, pressure gauge, parallel join and a safety check, an insulation mass flowmenter, a stop valve;

Be located at successively No. two pneumatic cut-out stop valves that take back on air gun pipeline, No. two pressure transmitters, No. two safety check, No. two insulation mass flowmenters, No. two stop valves;

No. three pneumatic cut-out stop valves, one end of described No. three pneumatic cut-out stop valves is connected to being incubated for No. between mass flowmenter and a pneumatic cut-out stop valve and a safety check of parallel join on air filling gun pipeline, and the other end connects between No. two insulation mass flowmenters and No. two stop valves on return-air gun barrel road;

Be located at No. four safety check on air filling gun refluxing opening pipeline, described air filling gun refluxing opening pipeline is connected between No. two safety check and No. two insulation mass flowmenters on return-air gun barrel road.

As such scheme preferably, between described No. two pressure transmitters and return-air gun barrel road, by ball valve, be connected.

The utility model has the advantage of: the utility model installs a pressure transmitter, pneumatic cut-out stop valve and insulation mass flowmenter additional on the return-air gun barrel road of LNG filling machine, and the collection to the analog or digital signal of pressure oscillation device by control system, realize and when storage pressure is more than or equal to default back pressure value, automatically open valve and carry out return-air; When storage pressure is less than default back pressure value, automatic-closing valve stops the function of return-air.

Accompanying drawing explanation

Fig. 1 is the structural representation of existing LNG filling machine;

Fig. 2 is structural representation of the present utility model.

In figure: 1, air filling gun pipeline; 2, return-air gun barrel road; 3, air filling gun refluxing opening pipeline; 4, No. three pneumatic cut-out stop valves; 11, a pressure transmitter; 12, pressure gauge; 13, a safety check; 14, a pneumatic cut-out stop valve; 15, an insulation mass flowmenter; 16, a stop valve; 21, No. two pneumatic cut-out stop valves; 22, No. two pressure transmitters; 23, No. two safety check; 24, No. two insulation mass flowmenters; 25, No. two stop valves; 31, No. four safety check.

Embodiment

Below in conjunction with specific embodiment, the utility model is described in further detail.

As shown in Figure 1, a LNG filling machine with automatic air return function of measuring, comprises and is located at successively a pneumatic cut-out stop valve of a pressure transmitter connecing on air filling gun pipeline, pressure gauge, parallel join and a safety check, an insulation mass flowmenter, a stop valve;

Wherein, between No. two pressure transmitters and return-air gun barrel road, by ball valve, be connected.

The foregoing is only the preferred embodiment that embodies the utility model principle, therefore do not limit protection domain of the present utility model, within every equalization of doing according to the utility model changes the scope of the claims of all containing at the utility model with modification.

Claims

1. a LNG filling machine with automatic air return function of measuring, is characterized in that: comprise and be located at successively a pneumatic cut-out stop valve of a pressure transmitter connecing on air filling gun pipeline, pressure gauge, parallel join and a safety check, an insulation mass flowmenter, a stop valve;

2. the LNG filling machine with automatic air return function of measuring as claimed in claim 1, is characterized in that: between described No. two pressure transmitters and return-air gun barrel road, by ball valve, be connected.