RU2734369C1 - Apparatus for degassing cylinders - Google Patents

Abstract

FIELD: chemistry.

SUBSTANCE: invention relates to apparatus for degassing cylinders in motor vehicles operating on compressed natural gas for their subsequent maintenance and repair. Proposed device comprises inlet line, three accumulator batteries, reservoir with inert gas and residual gas discharge line interconnected by pipeline system and electronic control unit. Degassing process is performed in automatic mode due to installation of electromagnetic valves in front of input line, each accumulator battery, reservoir with inert gas and residual gas discharge line.

EFFECT: technical result is automation of degassing of cylinders.

1 cl, 1 dwg

Description

SUBSTANCE: invention relates to installations for degassing cylinders for motor vehicles operating on compressed natural gas for their subsequent maintenance and repair.

Known installation for draining and degassing containers for liquefied hydrocarbon gases (hereinafter - LPG), including a nitrogen production unit, a compressor unit and a degassing unit, which consists of liquefaction and adsorption cleaning units. At the first stage, LPG is first squeezed or pumped out into the buffer tank from the emptied tank using the compressor block, and then LPG vapor is pumped out under the liquid layer. At the second stage, nitrogen is supplied from the nitrogen production unit to the degassed container and the remaining gas is displaced. (Pat. 2650246 Russian Federation, MPK7 E17C 7/00. Installation of draining and degassing tanks for liquefied hydrocarbon gases / Kurochkin A.V. - No. 2017138024; application. 31.10.2017; publ. 11.04.2018; Bul. No. 11) [ 1].

The disadvantage of the installation is the incomplete displacement of LPG vapors by an inert gas, the lack of automatic control of the device operation.

There is a known post for monitoring the release and accumulation of gas and degassing cylinders, containing 3 cassettes, which include gas cylinders intended for gas accumulation, a container in which cassettes are installed, a container with an inert gas, a candle for dumping residual gas and a manual control panel for the post nodes ( Equipment catalog [Electronic resource]: LLC "RariTEK". Products // Post degassing cylinders. URL: http://service.raritek.ru/post-degazatsii-ballonov/ (date of access: 15.07.2019): [2], which is taken as a prototype.

The disadvantages of the prototype include the lack of automatic control of the post.

The objective of the invention is to automate the process of degassing cylinders.

The technical result of the proposed invention is to improve the efficiency of degassing cylinders.

The technical result is achieved by installing solenoid valves in front of each of the nodes (in front of the inlet line, each storage battery, a container with an inert gas and a residual gas discharge line) of the installation for degassing cylinders (hereinafter referred to as the Installation).

The essence of the invention is as follows.

The gas-powered vehicle 1 (hereinafter referred to as the HMP) is connected through the remote filling device 2 (hereinafter referred to as the VCU) to the fitting of the connecting sleeve of the inlet line 3 of the Installation (Fig.), After which valve 4 is opened.

After pressing the "Start degassing" button on the electronic control unit 5 (hereinafter referred to as the ECU), the process of gas intake is started by equalizing the pressure in the accumulator batteries and cylinders of the HMT. After starting the system, the signal goes to solenoid valves 6 and 7, opening them. Solenoid valves 8, 9 and 10 are closed. After the gas pressure on the electronic pressure gauges 12 and 13 is equalized, the ECU closes the solenoid valve 7. Then there is a signal to open the solenoid valve 8. Solenoid valves 7, 9 and 10 are closed. After the gas pressure on the electronic pressure gauges 12 and 14 is equalized, the ECU closes the solenoid valve 8. Then comes the signal to open the solenoid valve 9. Solenoid valves 7, 8 and 10 are closed. After the gas pressure on the electronic pressure gauges 12 and 15 is equalized, the ECU closes the solenoid valve 9. Gas intake into the batteries 16, 17 and 18 is completed.

After the gradual filling of the accumulator batteries 16, 17 and 18 with gas, the solenoid valve 10 opens after 5 seconds. The gas remaining in the cylinders of the HMP exits through the residual gas discharge line 19 into the atmosphere.

When the pressure on the electronic pressure gauge 12 shows 0, the ECU will receive a command to close the solenoid valve 10 and open the solenoid valve 11 of the container with inert gas 20. After filling the cylinders with inert gas to a pressure of 0.4 MPa on the electronic pressure gauge 12, the ECU closes the solenoid valve 11 and opens a solenoid valve 10 for releasing the inert gas through the residual gas discharge line to the atmosphere. The ECU closes the solenoid valve 6 when the pressure on the electronic pressure gauge 12 drops to 0 MPa. Degassing of cylinders HMT completed. HMT is disconnected from the Unit.

After the work carried out with the gas-cylinder equipment, the HMP through the air intake is again connected to the fitting of the connecting hose of the inlet line of the Unit.

After pressing the "Start refueling" button on the ECU, the process of refueling the HMT starts. Solenoid valve 9 and 6 opens. Solenoid valves 10, 8 and 7 are closed. The ECU reads information from the electronic pressure gauges 15 and 12 and when the gas pressure in the cylinders of the HMT and the accumulator battery 18 is equalized, the solenoid valve 9 closes. Then there is a signal to open the solenoid valve 8. Solenoid valves 10, 9 and 7 are closed ECU reads information from the electronic pressure gauges 14 and 12, and when equalizing the gas pressure in the cylinders of the HMT and the storage battery 17, the solenoid valve 8 closes. Next comes the signal to open the solenoid valve 7. Solenoid valves 10, 9 and 8 are closed. The ECU reads information from electronic pressure gauges 13 and 12, and when the gas pressure in the cylinders of the HMT and the storage battery 16 is equalized, the solenoid valves 7 and 6 are closed. The filling of gas into the cylinders of the HMT from the storage batteries 16, 17 and 18 is completed.

The invention can be widely used in the Office of Technological Transport and Special Equipment of Gazprom Transgaz Ufa LLC in the maintenance and repair of motor vehicles running on compressed natural gas.

Claims (1)

Installation for degassing cylinders, including an inlet line, three storage batteries, a container with an inert gas and a residual gas discharge line, interconnected by a pipeline system, an electronic control unit, characterized in that the degassing process is carried out automatically due to the installation of solenoid valves in front of the inlet a line, each battery, an inert gas container and a residual gas discharge line.

Images