Float level controller of separator liquid

FIELD: mechanics.

SUBSTANCE: level controller of liquid in tank with gas-liquid mixture includes float connected to drain valve of liquid from the tank with possibility of covering the opening area of the valve at decrease of liquid level and with gas discharge valve with possibility of covering its opening area at increase of liquid level. Besides float is equipped at least with one ventilation pipe projecting above the float and connecting the inner cavity of the float to the tank cavity. At that, each ventilation pipe has a gap with float bottom, which provides passage area to the pipe, which is not less than the area of inner cross section of the pipe.

EFFECT: providing floatability and stability of shape at high pressures.

2 cl, 1 dwg

 

The invention relates to techniques for regulating the liquid level in the separator gas-liquid mixtures.

Widely known float controls the liquid level in the vessel in which the rise of the liquid level, the float moves up and opens the drain valve of the fluid, thereby increasing the rate of discharge and reducing the rate of increase of level up to negative, and Vice versa, when the lower level there is a reduction of flow discharge. However, these regulators have a significant disadvantage when used for gas-liquid mixture in which there are separate outlets for gas and liquid, and is regulated by only draining. In this case, by reducing the amount of gas in the gas-liquid mixture supplied to the line of the exhaust gas may leak fluid.

This problem is solved in the float controls the liquid level in the separator, when the valve is driven from the float is set not only on the line of the drain, but on the line of the exhaust gas (see, for example, SU 337766, EN 2032204). When the gas valve is closed when the level of fluid and movement of the float up, eliminating the possibility of liquid in the gas outlet line.

The closest to the invention is a controller of the liquid level in the tank with the gas-liquid mixture, containing a float connected with the valve to drain the fluid and the container with the possibility of overlapping of the bore of the valve during the lowering of the liquid level and with relief valve gas with the possibility of overlap of its bore when the level of liquid (SU 337766, published. 05.05.1972).

However, under conditions of high pressure float with an open cavity will lose buoyancy due to the reduction of the volume of the displaced fluid. A float with a closed cavity will be flattened under pressure, and with increasing thickness of the walls of the float it will sink.

The objective of the invention is to provide a float valve liquid level in the separator, operating at high pressures.

The technical result of the invention is the provision of buoyancy and shape of the float at high pressures.

The technical result is achieved by the fact that the controller of the liquid level in the tank with the gas-liquid mixture, containing a float connected with the valve to drain the fluid from the tank with the possibility of overlapping of the bore of the valve during the lowering of the liquid level and with relief valve gas with the possibility of overlap of its bore when the level of liquid according to the invention the float is provided with at least one vent tube protruding above the float and reporting the internal cavity of the float and the cavity of the container, each of the ventilation tube has a gap with the bottom of the float, providing a square bore in the tube is not less than the internal cross-section area of the tube.

In addition, the controller is equipped with killed what they hose, connected to the cavity of the float and designed to pressurize the float gas from an external source.

The drawing shows the proposed control level.

Float level regulator in the separator includes a chamber 1, provided with a pipe 2 for supplying gas, a pipe 3 exhaust gas pipe 4 for supplying the liquid and the pipe 5 drain. In the camera 1 is placed a float 6, which has a vertical vent tube 7 having a clearance with the bottom of the float 6, providing the area of the orifice in the tube 7 is not less than the internal cross-section area of the tube 7. The ventilation tube 7 protrude above the float 6 to a height not exceeding the distance from the top surface to the upper wall of the chamber 1 at the highest (working) fluid level in the chamber 1.

The float 6 is fixed profile 8 regulation of the gas outlet valve of the gas discharge and the profile 9 of regulation drain valve draining.

The controller operates as follows.

With the rise of the liquid level in the chamber 1, the float 6 is moved upward together with the profile 9 and opens the drain valve of the fluid, thereby increasing the rate of discharge and reducing the rate of increase of level up to negative, and Vice versa, when the lower level there is a reduction of flow discharge. When this profile 8 overlaps the KLA is an discharge gas, eliminating the possibility of liquid in the gas outlet line.

At lower liquid level, the float moves down, the profile 8 is moved downward, opening the valve of the discharge gas, and the profile 9, moving down, closes the drain valve and liquid is reduced drain flow.

The ventilation tube 7, rising together with the float 6 to the upper wall of the chamber 1, equalize the pressure in the chamber 1 and in the cavity of the float 6, which prevents the collapse of the float and its flooding. The gap between the ends of the tubes 7 and the bottom of the float 6 is chosen from the condition of ensuring the bore in the tube 7 is not less than the internal cross-section area of the tube 7, in order not to reduce the bandwidth of ventilation tubes and not slow equalization of pressure in order to avoid the collapse of the float 6.

However, if the residual volume of gas will be less than the volume of the float 6, the liquid begins to fill the float through the ventilation tube 7 and to reduce its buoyancy. With the further increase of pressure the float 6 may sink and block the drainage of liquid from the separator through pipe 5 drain. This situation can occur during the initial filling of the system, provided the specified flow control valve, the gas-liquid mixture with a low content of gas or liquid without gas. When lack of progress is to be placed gas in the system, the float 6 float to the top operating level and completely block the discharge gas. However, if the pressure in the system reaches the desktop and continue the flow of liquid without gas, the liquid level will rise above the maximum operating level, compressing the residual gas. When the liquid level rises to the upper wall of the chamber 1, will begin flooding of the float 6. Thus, in extreme mode, the initial filling of the system with the mixture may cause flooding of the float 6 and the loss of normal functioning of the regulator, up to the complete flooding of the float 6 and the blocking liquid (the liquid will go into the gas line).

To avoid this, the float 6 connect the flexible hose from the fitting on the wall of the chamber 1 (not shown in the drawing) to pressurize the float gas from an external source.

1. The controller of the liquid level in the tank with the gas-liquid mixture, containing a float connected with the valve to drain the fluid from the tank with the possibility of overlapping of the bore of the valve during the lowering of the liquid level and with relief valve gas with the possibility of overlap of its bore when the level of liquid, characterized in that the float is provided with at least one vent tube protruding above the float and reporting the internal cavity of the float and the cavity of the container, each of the ventilation tube has a gap with the bottoms of the m float, providing a square bore in the tube is not less than the internal cross-section area of the tube.

2. The regulator according to claim 1, characterized in that it is equipped with a flexible hose connected to the cavity of the float and designed to pressurize the float gas from an external source.



 

Same patents:

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3 dwg

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Water lift unit // 2318956

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Water lift unit // 2318956

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2 dwg

FIELD: physics, measuring.

SUBSTANCE: system contains a consistently joined comparison device - the adder, a digital controller of the fluid flux rate, object the regulations sweepped by a feedback, digital correcting proportional and integrated controllers, comparison devices, the block of insert of a correcting proportional controller and the filter of low frequencies. Current values of level of a fluid in capacity-collection from an exit of object of regulation arrive on an inlet of the filter of low frequencies and on an inlet of the block of insert of a correcting proportional controller.

EFFECT: increase of dynamic accuracy of regulation of the rate of flux of a fluid on level in capacity-collection in the conditions of activity of various perturbations at the expense of digital correction under the integrated law of the assignment to a controller of the rate of flux of a fluid on the filtered (rounded) values of level and insert of proportional correction making in algorithm at an exit of level from field of the "smooth" regulation.

1 dwg

FIELD: construction.

SUBSTANCE: invention relates to hydraulic engineering and can be used primarily in automatic rice irrigation systems. The siphon type hydraulic automatic device consists of a mounting attachment 1 made from a base 2 and pipes rigidly and strictly vertically mounted on it. In pipes 3 there is a crest on which a rod 5, fitted with floats 6, is rigidly attached. The rod is made composite so that, when the submersion layer in the level basin rises, the float does not lead to forced launch of the automatic hydraulic device. Its parts are joined by a threaded sleeve which allows for fast change (within necessary limits) of the length of the rod 5. Rigidity of the entire connection is retained and coaxiality of the rod 5 is observed. In the top part of the crest there is an air admission valve 7. The automatic hydraulic device is connected to level basin water outlet through a sleeve 8, and the water level in the level basin is set by a guide plate 9.

EFFECT: use of the automatic hydraulic device increases reliability of operation, rapidness and accuracy of regulation, improves regulation of the submersion layer of the level basin.

3 dwg

FIELD: machine building.

SUBSTANCE: invention relates to field of computer-aided manufacturing in machine building and is provided for workflow automation, related to control and regulation of liquid mediums. Device is structurally implemented in the form of two functional assemblies and allows two programming leads of functional capabilities and four outlets. At closed programming leads device is transformed into monitoring and regulation system of liquid level with usage of the first and the second outlets of device, providing monitoring mode and keeping of liquid level at fixed height and mode of filling and emptying of a reservoir with liquids. At open programming leads device is transformed into set of level control of top and bottom levels of controlled liquid of conducted type, outlets of which are correspondingly the third and the fourth outlets of the device. Device provides vertical, horizontal and complex (vertical installation of one and horizontal installation of other functional assembly) methods of installation. Device provides setting of control accuracy of liquid level in control mode and keeping of liquid level at its fixed height. Invention provides control of loads in the form of electromagnetic relay, two windings of contactor starter and outlets of logic elements.

EFFECT: extended capabilities of device by means of providing of regulation of liquid flows level at fixed height with ability of programming of its functional capabilities and nomenclature increasing of controllable loads and methods of its installation.

5 dwg

FIELD: machine building.

SUBSTANCE: invention relates to field of computer-aided manufacturing in machine building and is provided for workflow automation, related to control and regulation of liquid mediums. Device is structurally implemented in the form of one functional assembly, including conductometric sensor of liquid level, connected to sensitivity control, detectors, connected to second lead sensitivity control, threshold elements, connected to detectors, differentiator, unit for placement into initial state, JK- trigger, monostable circuit, replicator and indicator units. Additionally device contains three programming leads of its functional capabilities and four outlets. At closed first and second programming leads and connection of the third programming lead to third device outlet it is transformed into control and regulation system of liquid level with its agitated surface and usage of the first and the second outlets of device, providing verification and liquid level control mode at fixed height. At opened first and second programming leads and connected to each other third programming lead and third outlet of the device it is transformed into monitoring and regulation system of liquid with its smooth surface in the mode of monitoring and keeping of liquid level at its fixed height. At disconnected programming leads device is transformed into warning assembly of monitoring of top level of liquid with usage of the third outlet of device or warning assembly of monitoring of bottom level of liquid with usage of fourth outlet of device. Device provides vertical and horizontal methods of erection.

EFFECT: expansion of functional capabilities of the device and increasing of nomenclature of controllable loads and methods of its erection and also improvement of operational performance.

5 dwg

FIELD: physics; control.

SUBSTANCE: invention relates to automation of manufacturing processes in machine building and is meant for automating technological processes related to monitoring and controlling liquid media. The device is made in form of two functional assemblies and has three terminals for programming its functionalities and four outputs. The device has two level sensors, two multivibrators, capacitors, two detectors, two sensitivity controllers, two threshold elements, a differentiator, a JK flip-flop, a unit for establishing initial state, two repeaters and two display units. When the first and second programming terminals are closed and when the third programming terminal is connected to the third output, the device is transformed into a system for monitoring and controlling liquid level with its excited surface using the first and second outputs, which provides the mode for monitoring and maintaining the liquid level at a fixed height and the mode for filling and emptying the reservoir. When the first and second programming terminals are open and the third programming terminal is connected to the third output, the device is transformed into a system for monitoring and controlling liquid with its calm surface in the mode for monitoring and maintaining the liquid level at a fixed height and in the mode for filling and emptying the reservoir. The device provides vertical, horizontal and combined (vertical mounting of one and horizontal mounting of the other functional assembly) mounting methods.

EFFECT: increased functionalities of the device and wider range of controlled loads and mounting methods.

6 dwg

FIELD: mechanics.

SUBSTANCE: level controller of liquid in tank with gas-liquid mixture includes float connected to drain valve of liquid from the tank with possibility of covering the opening area of the valve at decrease of liquid level and with gas discharge valve with possibility of covering its opening area at increase of liquid level. Besides float is equipped at least with one ventilation pipe projecting above the float and connecting the inner cavity of the float to the tank cavity. At that, each ventilation pipe has a gap with float bottom, which provides passage area to the pipe, which is not less than the area of inner cross section of the pipe.

EFFECT: providing floatability and stability of shape at high pressures.

2 cl, 1 dwg

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