RU87420U1 - COMPLEX MEASURING WITH THE AUTOMATED PUMPING STATION - Google Patents

Abstract

1. The measuring complex, which comprises a folding bulk riser, a gangway, a frame (metal construction), a ladder, an elbow (with an air valve), a liquid meter, a shut-off valve, a liquid filter, a barrier, characterized in that it has an automated pumping station, which is a piping system in which an electric pump with a double mechanical seal is installed, valves, a bellows-type compensator, a frame, pressure transmitters, a temperature sensor, reed switches the sensors of the upper and lower levels, terminal boxes, the central control unit, the vessel tank, while pressure transducers are installed at the inlet and outlet of the electric pump, the temperature sensor is in the hole in the adapter flange of the electric pump, and the sensors of the upper and lower levels are in the vessel tank of mechanical seals . ! 2. The measuring complex according to claim 1, characterized in that the central control unit is configured to control the vacuum in the suction pipe and the pressure in the pressure pipe, the temperature of the bearings during pump operation, as well as the level of the shutter fluid in the reservoir tank. ! 3. The measuring complex according to claim 1, characterized in that the central control unit is configured to control the electric pump when the controlled parameter reaches the upper or lower threshold value, provides a visual display of the latter on the computer monitor and an alarm to the operator, also provides automatic shutdown of the electric pump when when the controlled parameter reaches a dangerous value.

Description

The invention relates to a device for filling automotive tanks with petroleum products. The closest analogue to the claimed invention is the well-known automated filling system "Measuring complex" (certificate RU 28682 U1, IPC7 B67D 5/04). The automated system of filling “Measuring complex” includes a folding bulk riser, a gangway, a frame (metal structure), a fence, a ladder, an elbow (with an air valve), a liquid meter, a shut-off valve, a liquid filter, a hydraulic unit, and a barrier. The disadvantages of this complex are the lack in the pumping unit of monitoring the negative pressure and pressure in the pressure pipe, measuring the temperature of the bearings during pump operation, and monitoring the operation of the double mechanical seal.

The aim of the invention is to increase the safety of the process of filling oil products by applying automatic control of the parameters of the electric pump and controlling the loading process during accounting and settlement operations.

A measuring complex is proposed, comprising a folding bulk riser, a gangway, a frame (metalwork), a ladder, an elbow (with an air valve), a liquid meter, a shut-off valve, a liquid filter, and a barrier.

The problem is solved in that it includes an automated pumping station, which is a piping system in which an electric pump with a double mechanical seal is installed, valves, a bellows type compensator, a frame, pressure transmitters, a temperature sensor, reed sensors of upper and lower levels, boxes terminal, central control unit, tank vessel, while pressure transducers are installed at the inlet and outlet of the electric pump, the temperature sensor is in the hole the flange of the electric pump, and the sensors of the upper and lower levels are in the tank tank of the mechanical seals. The central control unit (CBU) is configured to control the vacuum in the suction pipe and pressure in the pressure pipe, the temperature of the bearings during operation of the pump, as well as the level of the shut-off fluid in the tank vessel, and the central control unit is configured to control the electric pump when the controlled parameter of the upper or lower threshold value, provides a visual display of the latter on the computer monitor and an alarm to the operator, also provides omaticheskoe off the electric pump when the monitored parameter values dangerous.

The proposed measuring complex allows you to:

- increase the safety of the operator (staff);

- reduce the explosiveness of the measuring complex;

- increase the performance of the electric pump;

- increase the service life of the electric pump;

- increase the tightness of the electric pump.

The measuring complex consists of the following main blocks:

- automated pumping station;

- loading post;

- management.

Figure 1 shows the relative position of the blocks of the complex measuring for dispensing petroleum products to tankers.

Figure 2 presents an automated pumping station.

The composition of the measuring complex with an automated pumping station (Fig. 1) includes: a folding bulk riser 1, a cross over ladder 2, a frame (metal construction) 3, a ladder 4, an elbow (with an air valve) 5, a shutoff valve 6, earth clamps 7, automated pumping station 8, set of connecting pipe 9, barrier 10.

An automated pumping station (Fig. 2) is a piping system in which an electric pump with a double mechanical seal 11, valves 12, a compensator bellows 13, a frame 14, pressure transmitters 15, a temperature sensor 16, reed sensors of the upper and lower levels 17, boxes are installed terminal 18, CBU 19, tank vessel 20.

Connect to the CBU:

- pressure measuring transducers;

- thermal sensor;

- sensors of the upper and lower levels;

- terminal boxes.

Pressure measuring transducers are installed at the inlet and outlet of the electric pump to measure the vacuum pressure and pressure in the pressure pipe.

Within the operating range, the operation of the electric pump is ensured without changing its main technical indicators. In the case of an increase in the rarefaction pressure above the permissible level, the phenomena of vaporization and cavitation begin in the pump, which leads to a rupture of the flow continuity. The performance of the electric pump drops sharply.

When the operating value is exceeded, the monitored parameter is visually displayed on the computer monitor and an alarm is issued to the operator.

When the controlled parameter reaches a dangerous value, the electric pump is automatically turned off.

Permissible operation of the electric pump outside the operating range in the direction of increasing pressure. This is due to the installation conditions of the pumping station, the type of pumped liquid (taking into account the saturated vapor pressure), the length and diameter of the suction and pressure pipelines.

The temperature sensor is installed in the hole of the transitional flange of the electric pump to measure the temperature of the bearings during pump operation.

When the controlled parameter goes beyond the operating value, the controlled parameter is visually reflected on the monitor and an alarm is issued to the operator.

When the controlled parameter reaches a dangerous value, the electric pump is automatically turned off.

The sensors of the upper and lower levels are installed in the vessel tank of mechanical seals for monitoring the operation of the double mechanical seal (I and II stage).

The vessel-tank is filled with a barrier fluid to the specified operating position. The principle of operation is based on the operation of the reed sensors of the upper and lower levels when interacting with a magnet. The magnet is mounted in the body of the float.

The float moves relative to the tube in which the reed sensors of the upper and lower levels are located.

a) In case of failure of the first stage of the mechanical seal, the liquid level in the tank vessel rises above the working position. In this case, the upper level sensor is triggered and a signal is sent to turn off the electric pump.

b) In the event of a failure of the second stage of the mechanical seal, the liquid level in the tank vessel drops below the working position. In this case, the low level sensor is triggered and a signal is sent to turn off the electric pump.

c) In the event that it turns out that the vessel-tank is not filled with the shut-off fluid before the electric pump is switched on, the low level sensor must be activated. An alarm occurs and the electric pump does not start.

The loading post block (Fig. 1) is a metal frame 3 on which the operator’s platform is located and a folding riser 1 is mounted.

The measuring complex works as follows:

- Having received documents for the sale of oil product, the operator on the controller sets the selling dose in liters and gives a signal using software tools allowing the filling of the oil product;

- the driver of the tank truck, upon approaching the loading post, carries out the grounding of the tank truck with the help of ground clamps. When grounding the tanker, the boom of the barrier drops;

- the driver installs the filling tip in the neck of the tanker and fixes the filling tip to the neck;

- the operator turns on the filling station by pressing the START / STOP button, after which filling starts, and voltage is applied to the coil of the electromagnetic starter, the electric pump and the coil of the solenoid of the electrically controlled valve;

- the counter measures the volume (or mass) of the pumped oil product and gives pulses to the Central Bank with their digital display on the board;

- at the initial moment, the filling of the tank takes place at the minimum safe flow rate with a speed of 20 m ³ / h, after which a smooth transition to the required flow rate is made and before the dose is dispensed for 200 or 100 liters, the CBU switches the filling mode to the minimum flow rate of 20 m ³ / h;

- when the oil product reaches the maximum level in the tank, the limit level sensor is triggered, disabling the filling process;

- after the termination of the filling process, an air valve is activated to ensure complete emptying of the riser;

- at the end of filling, the driver removes the filling tip from the neck, connects a removable drip tray, installs it in the garage position and turns off the grounding device, thereby giving permission to operate (raising the boom) of the barrier.

Claims (3)

1. The measuring complex, which comprises a folding bulk riser, a gangway, a frame (metal construction), a ladder, an elbow (with an air valve), a liquid meter, a shut-off valve, a liquid filter, a barrier, characterized in that it has an automated pumping station, which is a piping system in which an electric pump with a double mechanical seal is installed, valves, a bellows-type compensator, a frame, pressure transmitters, a temperature sensor, reed switches the sensors of the upper and lower levels, terminal boxes, the central control unit, the vessel tank, while pressure transducers are installed at the inlet and outlet of the electric pump, the temperature sensor is in the hole in the adapter flange of the electric pump, and the sensors of the upper and lower levels are in the vessel tank of mechanical seals . 2. The measuring complex according to claim 1, characterized in that the central control unit is configured to control the vacuum in the suction pipe and the pressure in the pressure pipe, the temperature of the bearings during pump operation, as well as the level of the shutter fluid in the reservoir tank. 3. The measuring complex according to claim 1, characterized in that the central control unit is configured to control the electric pump when the controlled parameter reaches the upper or lower threshold value, provides a visual display of the latter on the computer monitor and an alarm to the operator, also provides automatic shutdown of the electric pump when when the controlled parameter reaches a dangerous value.