SU755655A1 - Fuel pump - Google Patents

Description

The invention relates to the maintenance of passenger cars.

A fuel dispenser is known, comprising a housing with a spool, a pressure line, a refueling and drain pipelines equipped with valves 11]. five

The disadvantage of such a column is the absence of an automatic shutdown of the water supply to the tank of the car and the associated leakage of excess water in the interstitial distance.

The purpose of the invention is the automation of shutting off the water supply to the passenger tank ^{10 of the} car and reducing its losses.

This goal is achieved by the fact that the case of the proposed column is equipped with a control piping, divided by a diaphragm into two cavities, one of which is located _{(5 located} between the control piping and the diaphragm, communicated through the drain valve with the filling piping and the other , communicated through the drain pipe with a fluid collector connected to 20 through a pressure pump and non-return valve with a filling pipe.

The drawing schematically shows the described filling column.

2

The gas station includes a housing 1 with a spool 2, to which a pressure line 3 is connected, a refueling 4 and drain 5 nozzles and a control pipeline 6, through which the housing 1 is connected to the main pipe 7 of the tank 8 of the car. In the case 1 between the test pipe 6 and the spool 2, a diaphragm 9 with a washer 10 is built in, dividing the case into two cavities, the cavity 11 communicating with the refueling pipe 4 via a pipe 12, into which the drain valve 13 with the valve 14 and the sewer pipe 15 is mounted. The drain pipe 5 communicates with a collection of 16 water, which, in turn, through pipe 17, the pressure pump 18, line 19 with a built-in check valve 20 is connected to the filling pipe 4. To turn off the pressure pump 18 p When there is no water in the collector 16, the latter is equipped with a float 21 with a rocker 22, and a limit switch 24 is connected to the pump control circuit 23 and interacts with the rocker 22. To turn the pump 18 into operation when there is water in the collector 16, there is a limit switch 25 interacting with fish755655

chagom 26. The charging nozzle 4 communicates with the drain nozzle 5 when the column is in the closed position (the spool 2 is in the lowest position according to the drawing) through the housing cavity 27.

The proposed column works as follows.

Before filling the car, the refueling 4 nozzle and the control 6 pipeline are connected respectively to the refueling 28 and messenger 7 pipes of the tank 8 of the car. After that, using the lever 26, the spool 2 moves to the uppermost (according to the drawing) position. When this pressure line 3 communicates with the filling pipe 4 and the water from the pressure line 3 through the filling pipe 4 and the filling pipe 28 of the tank 8 enters the latter. When moving along the filling nozzle 4, the water pressure closes the check valve 20, preventing it from pouring into the collector 16, and moves the spool 14 of the drain valve 13 to the extreme right (according to the drawing) position, separating the cavity 11 from the sewer pipeline 15. When the spool 2 moves up 26 releases the limit switch 25, the control circuit of the pump 18 when there is water in the collector 16 closes and the water from the collector 16 is pumped through pipelines 17, 19 through the check valve 20, the filling pipe 4, the filling pipe 28 to the tank 8 of the car, giving additional pressure. This achieves a reduction in water losses when refueling wagons. As water is pumped from the collector 16, its level in it decreases, the float 21 descends and, acting on the rocker 22 on the limit switch 24, opens the pump control circuit 23.

After filling the tank 8 of the car, the water flows over the plain pipe 7 and through the control pipeline 6 rushes into the cavity 11. A column of water formed during the filling of the cavity 11, the control pipeline 6 and the pole tube 7 (equal to about 5 m) affects the diaphragm 9 and spool 14 drain valve 13. The diaphragm 9, bending, the support washer 10 moves the spool 2 to the lowest (according to the drawing) position. In this pressure line 3 is disengaged from the filling pipe 4- This ensures the automatic shutdown of the water supply when filling the tank 8 of the car. The water left in the filling nozzle 4, the filling nozzle 28 through the cavity 27 of the housing 1 and the nozzle 5 is sent to the water collection 16. This ensures that water is collected for use when refueling the next car. After that, under the action of a column of water in the cavity 11,

control pipe 6 and the messenger pipe 7, the spool 14 of the drain valve 13 is moved to the leftmost (according to the drawing) position, since there is no water pressure in the filling nozzle 4. At the same time, the water remaining in the cavity 11, the control pipe 6 and the main pipe 7 is directed through the sewer pipe 15 of the drain valve 13 and the sewer. This prevents the pouring of water from the messenger pipe 7 in the station path. In addition, when moving the spool 2 down (according to the drawing, the lever 26 acts on the limit switch 25 and opens the control circuit 23 of the pump 18, turning it off. After that, the filling nozzle 4 and the control 6 pipeline are disconnected from the filling 28 and messenger 7 pipes of the car 8.

Using the proposed column will reduce the number of outfitters, as it allows the use of one outfitter to refuel several cars by automating the process of turning off the water, will prevent the station’s water from pouring out of the car’s pipe pipe and directing it to the sewer system, which will prevent cleaning them up from ice and will improve the working conditions of the station workers. In addition, the use of the proposed column will save about 13 liters of water at the time of refueling each car through the collection and use of water remaining in the filling pipelines.

Claims (1)

Claim A filling column containing a housing with a spool, a pressure pipe, a filling and drain pipelines equipped with valves, characterized in that, in order to automate the shutdown of the water supply to the passenger car tank and reduce its losses, the housing is equipped with a control pipeline, divided by a diaphragm into two cavities, one of which, located between the control pipeline and the diaphragm, communicates through the drain valve with the filling pipeline, and the other, located between the diaphragm and the spool, communicates through the drain The second pipeline with a liquid collector is connected through a pressure pump and a non-return valve with a filling pipe.