RU2708710C1 - Gas odorizer - Google Patents

Abstract

FIELD: technological processes.

SUBSTANCE: invention relates to gas or liquid odorizing devices and can be used in gas, oil, chemical and other industries where proportional input of substances in low doses is required at large change of medium values. Gas odorizer comprises a main and a control vessel connected to a station odorant storage container, a dispensing, flow meter and computing device, check valves, analyzer of concentration of odorant in gas, wherein metering device is made in form of hydraulic cylinder operating under excessive pressure, with piston and rod, which is driven from step electric motor through reduction gear, wherein actuation of step electric motor is performed automatically from control signal of computing device with feedback from analyzer of concentration of odorant in gas. In normal operation of the gas odorizer, the odorant is automatically taken from the station for storage of the odorant due to vacuum in one of the cylinder cavities of the dispenser, wherein the main and control vessels are not involved.

EFFECT: simplified design and increased reliability of gas odorizer operation.

1 cl, 1 dwg

Description

The invention relates to devices for odorizing a gas or liquid and can find application in gas, oil, chemical and other industries where proportional input of substances in small doses is required with a large change in the medium.

Known odorizers containing the main and control tanks with an odorant, as well as flow and metering devices.

So, the injector proportional odorizer is known (a.s. No. 262090, 01/26/1970, B01D 3/04) the dosing device is made in the form of an injector with a valve controlled by a pneumatic relay through a check valve with an adjustable throttle, providing a proportional odorant supply depending on the difference pressure at the flow diaphragm as a function of flow.

The main disadvantage of this device is the design complexity and low reliability of pneumatic actuators.

Closest to the proposed technical solution is a gas odorizer (patent No. 2247332, 02.27.2005, G01F 13/00), which consists of the main and control tanks with an odorant, a metering device in the form of an electromagnetic pulsator with a check valve and a siphon type meter, a flow meter and computing devices. The electromagnetic pulsator contains a housing, a core, a coil and a spring, and the siphon-type dispenser is made in the form of a non-magnetic housing, inside of which, in the upper part, a glass is connected through a non-return valve with an electromagnetic pulsator, through whose bottom a tube is passed, a cap is placed above the upper end of the tube associated with the adjusting device. A two-arm lever is mounted on the axis in the lower part of the housing, on one arm of which, located under the lower end of the tube, a cup with a hole in the bottom is placed, and on the other arm there is a permanent magnet interacting with a magnetoelectric contact fixed outside the siphon-type dispenser housing and connected via a computer device with an electromagnetic pulsator.

The main disadvantage of this installation is the design complexity of the electromagnetic pulsator, a large number of elements that complicate the design.

The objective of the invention is the provision of stable and reliable operation of the gas odorizer with a significant reduction in its overall dimensions.

The technical result to solve this problem is to simplify the design and increase the reliability of the gas odorizer.

The specified technical result is achieved in that the gas odorizer, containing the main and control tanks associated with the station storage capacity of the odorant, dosing, flow meter and computing devices, check valves, is additionally equipped with an analyzer for the concentration of odorant in gas, and the dosing device is made in the form of a hydraulic cylinder, operating under overpressure, with a piston and with a rod, driven by a stepper motor through a gearbox, with the inclusion of a stepping electrode igatelya performed automatically by the control computer with a signal feedback from the analyzer odorant concentration in the gas. During normal operation of the gas odorizer, the odorant is taken automatically from the station’s storage capacity of the odorant due to rarefaction in one of the cylinder cavities of the metering device, while the main and control tanks are not involved.

The design of the proposed gas odorizer is caused by operational practice, the need to simplify the design, reduce the number of components and overall dimensions of the odorizing blocks.

The design of the metering device in the form of a cylinder with a piston can significantly simplify its design and increase reliability. A cylinder with a piston is simple in design and requires precise coupling and sealing only at the interface between the piston-cylinder and the rod-cylinder. The inclusion of an odorant concentration in the gas in the analyzer system will provide additional control over the degree of odorization of the gas, and the computing device, taking into account two incoming signals, will provide the specified accuracy of the odorant input. The issuance of the control signal by the computing device to the stepping motor will ensure with mathematical precision the input of the desired amount of odorant into the gas pipeline. A significant difference in the design of this odorizer from other analogues is that the refueling of the main capacity of the odorant can be carried out automatically by a dosing device without creating excessive pressure in the underground storage capacity of the odorant.

The invention is illustrated by the drawing, where in FIG. 1 is a schematic diagram of a gas odorizer.

The gas odorizer consists of a main 2 and control 3 containers with an odorant, a metering device 1 made in the form of a hydraulic cylinder 15 with a piston 16, a rod 17 with a plunger 22, check valves 11, 12, 13, 14, a stepper motor 19, a gearbox 18, end switches 20, 21, an analyzer of the concentration of odorant in gas 24, flow meter 23 and computing 25 devices. In addition, the odorizer contains taps 4, 5, 6, 7, 8, 9, a valve 10, a filter 27 and a viewing window 29. The gas odorizer is mounted on the gas line 26.

The gas odorizer works as follows.

When the gas flow rate appears in the gas line 26, the flow meter 23, which measures the amount of gas passed through, transmits information to the computing device 25, which issues a command to turn on the electric motor 19, which in turn through the gearbox 18 and the rod 17 provides translational movement of the piston 16. Pressure the odorant behind the piston 16 in the cavity "B" of the cylinder 15 of the metering device 1 is increased and the portion of the odorant moves through the check valve 12 and then through the connecting channel through the open valve 10, valves 8, 9 and inspection box 29 is introduced into the gas line 26. The check valves 11, 14 due to its own spring bias the odorant and pressure behind the piston 16 closed and prevent flow of odorant in the connecting channel associated with the station storage tank 28 of odorant, the main valve 4 of the container 2 is closed.

The number of revolutions of the stepper motor is precisely determined by the computing device, upon reaching which the motor stops, the input of the odorant is suspended until a new cycle. During the movement of the piston 16 in the cavity “A” of the cylinder 15 of the dosing device 1, a vacuum is created, due to which it is filled with an odorant from the station storage tank of the odorant 28 through a filter 27, open taps 5, 7 and a check valve 13. At the same time, the valve 4 is closed .After the piston 16 reaches its extreme right position, the pusher 22 will close the limit switch 21, which will change the direction of rotation of the stepper motor. Now, when a command is issued by the computing device 25 to the stepper motor 19, the movement of the piston 16 will occur in the opposite direction. When the piston 16 moves to the left, the cavity “B” of the cylinder 15, due to the discharge in it, will be filled with an odorant from the station storage capacity of the odorant 28 through the filter 27, open taps 5, 7 and the check valve 14, and the increase in pressure of the odorant in the cavity “A” cylinder 15 of the metering device 1 will provide through the check valve 11, the connecting channel, valve 10, valves 8, 9 and the inspection window 29 to enter it into the gas line 26. The check valves 12, 13 are closed by tightening their own springs and odor pressure behind the piston 16 and hinder the filing of odo welt in the connecting channel associated with the station storage capacity of the odorant 28, the crane 4 of the main tank 2 is closed.

Such a cyclic operation of the device minimizes the overall dimensions of the gas odorizer even when significant amounts of odorant are required. The computing device, in the logic of which the ratio of the established rate of input of the odorant and the linear movement of the piston 16 in the cylinder 15 of the metering device 1 is laid, ensures high accuracy of the input of the odorant. And the use of an analyzer of the concentration of the odorant in gas 24 will increase the reliability of the odorizer, since all commands issued by the computing device 25 will be checked and corrected by feedback in the form of an input signal from the analyzer of the concentration of the odorant in gas 24. A condition can be entered into the logic of the computing device 25, in which the input of the odorant will be provided without changes in case of a mismatch of not more than 10% of the direct signal coming from the flow meter device 23 relative to the return signal received from analyzer of gas odorant concentration 24. If the mismatch is exceeded by more than 10%, provide a warning or alarm signal to the operator’s console, to analyze the situation and make a decision on switching to a backup, or manually enter the odorant.

In case of failure of the metering device during the repair period, it is possible to supply an odorant from the main tank 2 through the connecting channel through the valve 4, 6, 9 with the valve 10 open for a certain amount and visual observation through the sight glass 29. In this case, the valves 5, 7, 8 closed.

All these design features ensure the achievement of the claimed technical result.

Claims (2)

1. A gas odorizer containing the main and control tanks associated with the station storage capacity of the odorant, metering, flow meter and computing devices, check valves, characterized in that it is additionally equipped with an analyzer for the concentration of odorant in gas, and the metering device is made in the form of a hydraulic cylinder, operating under excessive pressure, with a piston and a rod, driven by a stepper motor through a gearbox, while the inclusion of a stepper motor in the work is carried out automatically cally from the control signal of the calculation unit with feedback from the analyzer odorant concentration in the gas. 2. The gas odorizer according to claim 1, characterized in that during normal operation of the gas odorizer, the odorant is taken automatically from the station’s storage capacity of the odorant due to rarefaction in one of the cylinder cavities of the metering device, while the main and control tanks are not involved.

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