RU2091128C1 - Pneumovibratory device for automatic filtration and transfer of various liquids - Google Patents

Abstract

FIELD: automatic filtration and transfer of various liquids. SUBSTANCE: device includes drain hose which is connected with lower reservoir of vibratory pump; lower cavity of this pump is connected with ejector diffuser by means of pipe line, thus providing for continuous process of filtration and transfer of liquids. Provision is made for transfer of liquids to reservoirs which are located above this device. EFFECT: enhanced efficiency. 1 dwg

Description

 The invention relates to filtering and pumping various liquids, including highly aggressive, fire and explosive.

 A known installation for filtering paints and varnishes (ed. St. N 1643046, class B 01 D 29/00), containing a removable strainer, an intermediate tank, inside which there is a float valve, equipped in its upper part with a cylindrical protrusion and in the lower conical a protrusion arranged coaxially with the intermediate tank. An ejector is connected to the neck of the intermediate tank, and a pump with an air motor connected to the source of compressed air through a common three-way valve is connected to the bottom. Continuous stable operation of the installation is ensured by the flow of filtered fluid through the suction pipe and the issuance of filtered fluid through the drain pipe while the ejector and pump are simultaneously operated with variable raising and lowering of the float valve interacting with the vacuum and drain channels of the intermediate tank.

The disadvantages of this installation include the following:
1. Drain of the paint material from the intermediate tank is not possible when the ejector is working, and there is a vacuum in its upper part. To drain it, it is necessary to close the compressed air supply to the ejector through a three-way valve in order to connect the upper part of the intermediate tank through it with the atmosphere, and then, when the paint material merges, open the three-way valve again and bring the compressed air to the ejector. This disrupts the continuous filtering process. To do this, a pump with an air motor is installed in the device, which increases the cost of this device and increases the complexity of its maintenance during operation.

 2. During operation of this installation, after the float valve emerges, atmospheric air enters the upper part of the intermediate tank through the drain pipe and pump, which reduces the vacuum in it, which reduces the lift height and the suction rate of the paint material.

 3. Using this installation, in which pumps are used in their usual design, it is impossible to filter highly aggressive liquids (due to contact with them, these pumps lose their functionality) and filter fire and explosive liquids, since during their filtering their inevitable leakage through stuffing box of the pump auger shaft, and this can cause a fire or even explosion.

 4. The energy of compressed air is not fully used, which, having passed through the ejector, possessing even greater energy, is emitted into the atmosphere.

 Closest to the invention in technical essence to the proposed device is a device for automatic transfusion and filtering liquids (RU, patent N 2 050 931, CL B 01 D 29/00, 29/60, 37/04, priority from 12/27/93) comprising a filter installed in the intake hose, connected through a non-return valve to a sealed container, a drain pipe connected through a non-return valve to a sealed container, and a vacuum line. The latter is connected with the passive nozzle of the ejector, the active nozzle of which is connected to the compressed air line. The device also contains pipelines, control valves, a float valve with loads mounted on the stem with two stops.

 A saddle is made on the lid of the sealed container, between the inner hole of which and the outer diameter of the sleeve there is an annular gap. The sleeve is mounted on a suction nozzle, the upper part of which has a U-shaped flange with radial holes. The nozzle is attached to the cover with a flange and screws. To obtain a vacuum, an ejector is used in the device.

 Before starting work, open the valve in the compressed air line, which, having passed through the active nozzle of the ejector, creates a vacuum and, through its passive nozzle, draws air out of the vacuum line. Then open the valve in the pipeline, which connects the sealed container with a vacuum line.

 When a certain vacuum is reached in a sealed container, the liquid under atmospheric pressure from the container in which it is located, passing through the filter, intake hose, tap and check valve will enter the sealed container. In this case, the float will rise and in the upper position will raise the rod, the emphasis of which will block the pipe, through which the ejector pumped air from the sealed container. At the same time, the sleeve mounted on it will rise and connect the sealed container through the annular gap and radial openings with the atmosphere. In this case, the rod will be kept in the upper position due to the pressure difference: vacuum in the pipe and atmospheric air in a sealed container. In this case, the non-return valve in the intake hose closes, and the non-return valve in the drain pipe opens, the filtered liquid is drained through it into the required capacity.

 After draining the liquid from the sealed container, the float valve will lower due to the absence of the buoyancy force of the liquid, acting on the stop, tear the rod from the nozzle, since the weight of the float, its load and rod is greater than the differential pressure force with which they were held in the upper position. In this case, the sealed container will contact the vacuum line and the cycle will be repeated.

The disadvantages of this device:
the device does not work continuously, but cyclically: first, the liquid enters the sealed container, and after filling, the liquid is drained from it;
this device cannot pump liquids into containers that are installed above a sealed container;
the energy of compressed air is poorly used, which, passing through the ejector, possessing even greater energy, is released into the atmosphere;
During operation, atmospheric air enters the gap between the diameter of the freely sliding sleeve and the outer diameter of the suction nozzle, which reduces the vacuum in the sealed container, which reduces the height of the liquid and increases the time it takes to fill the sealed container.

The objectives of the invention are
obtaining continuous operation of the device;
pumping filtered liquids into containers installed above a sealed container;
fuller use of energy of compressed air;
increasing the lifting height and reducing the filling time of the sealed container.

 This is achieved by the fact that the drain hose of the device is connected through a non-return valve to the lower cavity of the vibration pump additionally installed in it, and the ejector diffuser is connected by a pipe to its upper cavity, while an annular seal is installed on the suction nozzle of the device, and freely sliding between the U-shaped flange the sleeve is equipped with a spring that holds it in the lower position.

 This allows you to feed the drained fluid from the device into the lower cavity of the vibrating pump, which during operation continuously pumps it into containers that are installed above it, which increases its technical characteristics, it alone cannot lift liquids from great depths. And the supply of exhaust compressed air from the diffuser of the ejector to the upper cavity of the vibrating pump allows you to more fully use the energy of compressed air. In this case, the installation of an annular seal device on the suction nozzle and the installation of a spring on it, between the U-shaped flange and the freely sliding sleeve of the spring, which holds it in the lower position, makes it possible to increase the vacuum in the sealed container and increase the lift height of liquids into it, as well as reduce pumping time of air from it, which allows to improve the technical characteristics of the device.

 All this allows us to talk about the novelty and significant differences of the proposed pneumo-vibration device for automatic filtering and pumping various liquids.

 The drawing shows a device, General view.

 The device comprises a device for automatic transfusion and filtering of liquids, including a sealed container 1, a filter 2 installed in the intake hose 3, connected through a non-return valve 4 to a sealed container, a top cover 5, a drain hose 6 connected through a non-return valve 7 to a sealed container and vacuum line 8. The latter is connected to the passive nozzle 9 of the ejector 10 (with a diffuser 11), the active nozzle 12 of which is connected to the compressed air line 13. The device also contains pipelines 14, control valves 15, a float valve 16 with loads 17 mounted on a stem 18 with stops 19 and 20.

 A saddle 21 is made on the cover 5 of the sealed container, between the inner hole of which and the outer diameter of the freely sliding sleeve 22 there is a gap 23. The sleeve 22 with the upper outer flange 29 is mounted on the suction pipe 24, the upper part of which has a U-shaped flange 39 with radial holes 25 The suction pipe 24 is attached to the lid of the sealed container using a flange 26 and screws (not shown).

 An annular seal 27 and a spring 28 are installed on the suction nozzle 24, which holds the sleeve 22 in the lower position.

 The device is additionally equipped with a vibration pump, its lower cavity 30 is connected through a non-return valve 31 and a drain hose 6 to the device for automatic transfusion and filtering of liquids, and the diffuser 11 of the ejector 10 is connected by a pipe 32 to its upper cavity 33. Between the casing 34 of the vibration pump and its cover 35 a diaphragm 36 is installed, which is pressed into the upper position by the spring 37 through the stop disc 38. A rod 48 is installed in the cover 35, a damper 49 and restrictive nuts 50 are mounted on it. The cover 35 has drainage holes 51, and in the rod 48 versts 52 and 53. The lower tank 30 is connected through a non-return valve 54 and a pipe 55 to a tank 56, where the filtered liquid 46 needs to be pumped, and the ejector diffuser is connected to a pipe 57, through which compressed air can be drawn into the atmosphere when the vibrating pump is operating.

 The device operates as follows.

 Before starting work, taps 15 are opened in the compressed air line and pipe 57, in the intake hose 3 and the drain hose 6. Compressed air, passing through the active nozzle 12 of the ejector 10, creates a vacuum and, through its passive nozzle 9, pumps out air from the vacuum line 8. Then open the valve 15 in the pipe 14, which connects the sealed container 1 with the vacuum line 8. When the sealed tank 5 reaches a certain vacuum, the liquid 46 under atmospheric pressure from the tank 45, passing through the filter 2, in which there will be all mechanical impurities, the intake hose 3, the valve 15 and the non-return valve 4 will enter the sealed container 1. In this case, the float 16 will rise and in the upper position will raise the rod 18, the stop 19 of which will block the pipe 24. At the same time, the sleeve 22 and will connect the sealed container 1 through the annular gap 23 and the holes 25 with the atmosphere. In this case, the rod 18 will be held in the upper position due to the pressure difference: vacuum in the pipe 24 and atmospheric air in a sealed container. The non-return valve 4 will close and the non-return valve 7 will open, the filtered liquid through it, the nozzle 6 and the non-return valve 31 will enter the lower cavity 30 of the vibration pump. For better and more complete filling, it is necessary to unscrew screw 47. After filling it, it is necessary to screw in screw 47, disrupting the connection of the lower cavity 30 with the air atmosphere.

 After draining the liquid from the sealed container, and due to the elongation of the lower part of the stem 18, not all of it will merge from it, the float valve 16 will lower due to the lack of the buoyancy force of the fluid, acting on the stop 20, tear off the stem 18 from the nozzle 24, since the weight of the float 16, the load 17 and the rod 18 are greater than the differential pressure force with which they were held in the upper position. In this case, the sealed container will again contact the vacuum line 8 and the cycle of the device for automatic transfusion and filtering liquids will be repeated.

 After filling the lower cavity 30 of the vibration pump with liquid, it is necessary to open the valve 15 in the pipeline 32 and close in the pipeline 57. Then the exhausted compressed air in the ejector 10 from the diffuser 11 will enter the upper cavity of the vibration pump 33, where the middle part of the membrane 36 will lower down, compressing the spring 38 Together with the diaphragm, the rod 48 will lower as the compressed air presses its lower part against the diaphragm 36. The rod will lower until its nuts 50 abut against the cover 35. After that, the membrane 36 will tear off and change schenie upwardly under the action of compressed air. In its upper position, compressed air in the supmembrane space exits through the openings 52 and 53 into the atmosphere, and the membrane 35 and the rod 48 will return under the action of the spring to its original position and the operation cycle will be repeated.

 With this lowering of the membrane 36, the filtered fluid is squeezed out through the non-return valve 54 and the pipeline 55 into the container 56. When it is lifted, a discharge occurs in the lower container 30 and the filtered liquid is supplied to it through the non-return valve 31 from the device for automatic transfusion and filtering. The frequency of the operation of the vibration pump depends on the technical parameters of the compressed air, and since it works as a vibrator, practically the process of pumping liquids is continuous.

 At the end of the device, you must close the valve 15 in the compressed air line and all other valves in the device.

 In the manufacture of the device, its materials depend on the properties of the filtered and pumped liquids; they can be polyethylene, vinyl plastic and ftoroplast, as well as stainless and structural steels.

 In the absence of compressed air, you can use the exhaust gases of internal combustion engines, while filtering and pumping combustible and explosive liquids, these gases must be cooled by first passing through a pipe coil placed in a container with cold water.

Claims (1)

 A device for automatically filtering and pumping various liquids, containing a filter installed in the intake hose, which is connected to a sealed container through a first non-return valve, a drain hose connected to a sealed container through a second non-return valve, a float valve made with loads and mounted on a rod with two stops in a sealed container, a suction pipe mounted on the top cover of the sealed container, on which freely sliding sleeve with the upper outer a flange, its lower part interacts with the seat made coaxially with the suction nozzle on the top cover of the sealed container, an annular gap is made between the inner hole of which and the outer diameter of the sleeve, and the suction nozzle in its upper part is made with an external U-shaped flange with radial holes, an ejector , pipelines, control valves and a compressed air line, characterized in that the drain hose is connected via a non-return valve to the lower cavity of the additionally installed stroystve vibronasosa and diffuser of the ejector is connected by piping to an upper cavity, wherein the suction nozzle installed on the sealing ring and between the U-shaped flange and freely sliding sleeve mounted spring retaining sleeve in its lower position.