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Title:
DOSING PUMPS FOR TRANSMISSION OF FLUIDS WITH HYDRAULIC DRIVER AND ROTARY OIL DIVIDING GATE
Document Type and Number:
WIPO Patent Application WO/2019/180575
Kind Code:
A1
Abstract:
In the current invention, the force is first transferred to the hydraulic pump by the electromotor and then by the belt to the gearbox. The oil is led toward the oil rotary dividing gate by the hydraulic pump and the rotary oil dividing gate is responsible of sending oil packets to the back of the diaphragm and then returning. The reducer gearbox is responsible for rotation and then it goes to the pressure adjustment valve and debit control valve and finally back of the diaphragm and pushes it forth and causes the fluid to discharge from discharge section.

Inventors:
MAHMOODIMEHR, Seyedmehdi (Unit 1, 141 Bldg. 11th Alley, Zargari St, Shiraz 91345, 7183991345, IR)
Application Number:
IB2019/052165
Publication Date:
September 26, 2019
Filing Date:
March 18, 2019
Export Citation:
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Assignee:
DALINKOOH PARSE INDUSTRIAL CO. (No. 249, 22th Alley Eram St, Shiraz 46448, 7143746448, IR)
International Classes:
F04B43/067
Foreign References:
DE102006044255B32008-03-27
DE102014010108B42016-01-28
ES2231976T32005-05-16
Download PDF:
Claims:
CLAIMS:

1. Invention of “a Dosing pumps for transmission of fluids with hydraulic driver and rotary oil dividing gate” including at least a pump for creating the hydraulic force, at least a regulator for pressure adjustment, at least a rotary oil dividing gate system for hydraulic oil, at least a system for pressure display, at least a regulator for external pressure adjustment, at least a valve for debit control, at least an intermediary diaphragm and at least a spacer between the two diaphragms, at least an intermediary fluid to transfer the force, at least an isolated polymer diaphragm, at least a diaphragm hosing pump structure equipped with going round poppet valve, at least a cooling coil, an iron cast carter equipped with iron cast cap with especial sealing, display gauge for hydraulic oil in the carter and electromotor, force transfer system, gearbox, metal chassis.

2. The invention of claim 1 , wherein the pump body could be made from iron cast and/or aluminum and/or compound polymer and/or any other robust material.

3. The invention of claim 1, wherein the electromotor generating the motive force may be single phase, three phase, AC and/or DC and/or stepper motor and/or hydraulic turbines and/or pneumatic turbines and/or any other system for creating the motive force.

4. The invention of claim 1, wherein the electromotor is directly connected to the hydraulic pump via a polymer coupling.

5. The invention of claim 1, wherein the hydraulic pump installed on the main pump body and provides access for the motive force from outside of the pump.

6. The invention of claim 1, wherein the electromotor generating the motive force is equipped with some kind of pulley to transfer the movement

7. The invention of claim 1, wherein the motive force is transferred by the electromotor pulley using some grooved belt, grooved flat and/or any other belt or chain and/or a series of gears to the gearbox

8. The invention of claim 1, wherein the motive force transferred to the gearbox rotates the rotary oil dividing gate system.

9. The invention of claim 1, wherein the plunger cylinder has some side holes and also some holes on the central axis.

10. The invention of claim 1, wherein the number of paths embedded on the rotary oil dividing gate system may be different based on the design and number of diaphragms and pump frequency

11. The invention of claim 1, wherein the rotary oil dividing gate system consists of an outer cylinder in which a cylinder with less diameter made from Babbitt and in the Babbitt cylinder there is a steel and fully polished cylinder.

12. The invention of claim 1, wherein the rotary oil dividing gate system has a connection flange to the pump shell.

13. The invention of claim 1, wherein the central axis of the rotary oil dividing gate system is isolated from the cylinder shell by radial shaft sealing and/or any other sealing.

14. The invention of claim 1, wherein the plunger cylinder has some kind of turbine in its inner part on the central axis to create movement flow in the oil flowing in the carter.

15. The invention of claim 1, wherein the high pressure flow of hydraulic oil enters the collector after exiting hydraulic pump via metal and/or polymer piping with the power to endure such pressure.

16. The invention of claim 1, wherein the high pressure oil in the collector is divided into two or more parts.

17. The invention of claim 1, wherein each of the collector’s outlets are connected to a passage way of the rotary oil dividing gate system and by rotation of the rotary oil dividing gate system axis, in turns and based on the timing of the holes on the rotary oil dividing gate system axis exits from the connectors on the other side.

18. The invention of claim 1, wherein the high pressure output flow after exiting rotary oil dividing gate system connectors enter a collector equipped with a single output.

19. The invention of claim 1, wherein the high pressure oil outputted from the secondary collector passes the pump shell via certain fittings and enters the other side of the diaphragm from the transmission line.

20. The invention of claim 1, wherein the high pressure oil also passes a barometer, and at least one external regulator and one debit control valve in its way to the diaphragm

21. The invention of claim 1, wherein the high pressure oil outputted from the debit control valve enters the pump tank using the piping and then to the back side of the tank containing the intermediary diaphragm.

22. The invention of claim 1, wherein the spacer and intermediary fluid in the back of the diaphragm enables isolation and prevention of oil leakage out of the pump tank and/or probably the pumping materials entering the pump due to a rupture in the diaphragm.

23. The invention of claim 1, wherein the oil flowing in the back of the diaphragm finds its way to the suction part of the hydraulic pump and enters the return cycle.

24. The invention of claim 1, wherein the suction part of the hydraulic pump is connected to the plunger cylinder and, by opening the suction channel, it is possible to suck the hydraulic oil in the back of the diaphragm.

25. The invention of claim 1, wherein the suction part of the hydraulic pump is equipped with some kind of collector.

26. The invention of claim 1, wherein connective suction collector is connected to one of the channels of the rotary oil dividing gate system which connects to the filter center embedded on the pump shell on the other side of the rotary oil dividing gate system channel in the cycle timing in a proper time and location using the piping and by creating negative pressure, leads the consumed oil into the filter to be filtered.

27. The invention of claim 1, wherein one of the channels leading to the suction collector is connected to the rotary oil dividing gate system somehow under pressure expansion tank.

28. The invention of claim 1, wherein the expansion tank includes also a rubber tube of under pressure gas.

29. The invention of claim 1, wherein the expansion tank possesses the power to correct the pressure of the suction collector and in case of extreme increase and/or decrease in the pressure enables the returned oil to be used in the pump.

30. The invention of claim 1, which is equipped with some kind of steel chassis to install electromotor, pump shell and gearbox.

31. The invention of claim 1 , which is equipped with polymer diaphragm.

32. The invention of claim 1, wherein since anti-corrosion materials are used as input and output, the pump is also capable of transmission of corrosive liquids.

33. The invention of claim 1, wherein diaphragm dosing pump may be made from polymer and/or composite and/or any other robust flexible and anti corrosion material.

Description:
DOSING PUMPS FOR TRANSMISSION OF FLUIDS WITH HYDRAULIC

DRIVER AND ROTARY OIL DIVIDING GATE TECHNICAL FIELD OF THE INVENTION:

The technical field of the current invention includes the diaphragm pumps and particularly dosing diaphragm pumps which are used in chemical and oil and gas industries and also involves fluids, fluids mechanics, systems and structures for fluids flow control.

PRIOR ART:

The performance of dosing pumps currently existing in the market is such that the rotatory movement is transformed to the linear movement by gearbox (crank shaft, connecting rod, gears) and causes the diaphragm to shuttle back and forth.Packing tank is also used for sealing.

The invention No.US4619589A patented in USA titled as “Diaphragm pump particularly for dosing liquids” is an invention about diaphragm pump which is mostly used for dose and / or for measurement of liquids. On one side a dose roomwith a poppet valve and pressure and on the other side a hydraulic working room with piston and drive pressure is provided that the discharge hatchesof both rooms are separated by the working diaphragm.Diaphragm protection preserves it against extra tolerance for which the diaphragmleads a tank connected to the working room to apoppet valve unit using at least one channel in the vicinity of overflow channel.

Also in the invention No.US5065903A patented in USA titled as“Fluid delivery system for controlling fluid flow”, which is a delivery system for fluid flow control which consists of a control valve, a controlelectric motor and a hydraulic piston motor which includes a shaft that is rotatedby the system when the fluid gains flow.The fluid flow speedin the system is measured by the hydraulic motor and is reflected by the speed at which the hydraulic motor shaft is rotated. The flow speed which flows by the system is controlled by the valve. Control motor reacts to any external signal which shows that the rotation speed of the control motor is relevant to the fluid flow rate. The shafts of control motor, hydraulic motor and control valve are connected dynamically.

Also the invention No.US5065903A patented in USA titled as “Hydraulic pump”whichpresents a kind of dosing pump in which using a specific casing which is somehow equipped with a shaft or roll bearings such that the direction of roll bearings is in a way that after the casing door is closed, the shaft will be surrounded by the bearings from both sides and there would be no way for it to slip toward outside of the casing. A circular plane around the central shaft which is positioned angularly in the casing, makes the cylindricalpistons connected to the retaining plate to be pulled out and pushed into the embedded cylinder while rotation.In the meantime, the oil transmission groovesin the end of each cylinder helps the cylinders put around the central shaft which are rotating along with the shaftdue to spline connection on it to be compressed toward an asymmetric plane with a springs and by rotation in each cycle the pistons are compressed into the cylinder and then pulled back completely so that there would be always a flow of continuous suctions and pumping of the fluid in the opposite phase of rotation. TECHNICAL PROBLEMS AND GOALS OF THE INVENTION:

The current pumps which are commonly used in the market the debit variation range and pressure are too low and also if the diaphragm is ripped off or holed for any reason, the fluid would immediately leak into the gearbox and min the gearbox components in case of a corrosive fluid. Also based on the sealing type (packing be used)some amount of such leakage would always be present.

So this invention aims to lead to a device for easier control, make way to increase debit and pressure in a wide range, prevent fluid leakage, installation, easier commissioning and troubleshooting and to decrease repair costs. DESCRIPTION OF THE INVENTION:

The current invention is a variant of diaphragm dosing pump in which by back and forth movement of the pump diaphragm plane the oil preserved in the inner space of the pump is pumped out from the exit route and by compression of the outlet poppet valve due to the high pressure created in the fluid condensed in the pump.Now the inlet poppet valve reduces the probability of fluid kick back to the minimum. Considering that the diaphragm need to be compressed and decompressed in each working cycle, the structure of this pump includes a system to create the motive force using hydraulic structure. The main body of the pump may be built fromcast iron and / or aluminum and/ or composite and / or any other robust structure. In the main part of the pump body a vacant space is included to retain the hydraulic oil and the instruments needed to create the motive force for the pump. On the other part of the diaphragm dosing pump there is this rotary oil dividing gate. The rotary oil dividing gate consists of a cylinder equipped with embossed edges as in flange. This cylinder could be strewed to the cast ironbody of the pump using its flange and due the sealing which is proportionate to the pump body. It is perfectly robust against hydraulic oil leakage. In the inner side of this cylinder, using a specific layer of Babbitt enables the central shaft to move in a perfectly isolated manner. There are possibly holes across from each other linearly positioned on the two side on the outer cylinder based on the pump design and probable number of diaphragms.

In the middle part of this cylinder there is a steel shaft with a very smoothed and polished surface which is installed in the vicinity of the Babbitt layer on the inner part of rotary oil dividing gate cylinder, creates a very close and low friction connection, hence the oil molecules get between the outer surface of the shaft and inner surface of the rotary oil dividing gate which reduces the oil leakage while facilitating the shaft rotation and circulation of the central axis.

On the central axis, perpendicular to the symmetry line, there are thorough holes in the same number as the holes on the rotary oil dividing gate cylinder the positioning axis of whichalong the shaft is the same as their location on the rotary oil dividing gate cylinder. So that by rotation of the central axis of the rotary oil dividing gate system against the outer cylinder holes and when the outer layer holes meet the holes on the central axis, in case there was fluid pressure, the fluid would flow from a hole of outer cylinder to the inner cylinder hole, facilitating its flow through the other hole on the outer cylinder. Now the fluidis able to pass through all the holes which are face to face and after passing through such path, it would go to the location where the resultant pressure is exploited. Thus, in case of the central axis or the central shaft rotation in each cycle, the fluid may flow through a hole of outer cylinder to another, only once. On the central axis, each hole has a phase difference with the next one, so that a complete cycle of rotation divides the central axis into 360 degrees. This complete circle is divided between the holes, such divisions are not necessarily equal, however it is possible to control the passage time of the fluid based on a particular angle of rotation, so that a complete cycle of rotary oil dividing gate rotation could be considered as a functional cycle of the device and based on need, the holing angle on the central axis could be determined.

There is a gear pump located on the iron cast body of the pump which rotates once for each rotation of the gear pump electro motor due to coupling. This pump is responsible for suction of hydraulic oil and sending it to the collector on the outer rotary oil dividing gate cylinder. If the cylinder would have five holes, then the collector would have five connections across from the holes, so that any of the collector’ s holes could be strewed to the cylinder. A pressure poppet valve on the piping connected to the collector enables extra pressure of gear pump to exit in case of any problems. The pulley located on the electromotor shaft using a belt moves the gearbox on the back part of oil carter and connected to the rotary oil dividing gate central shaft.

The mechanical ratio between the electromotor pulley and gearbox pulley and also the mechanical ration between the intrinsic movements of the gearbox could be summed up in a way that would always provide a constant pressure in the collector to enable movement of other pieces. So that in each rotation of the rotary oil dividing gate, if a certain amount of oil shall pass through the rotary oil dividing gate holes, the summation of this oil should not be more that the oil debit circulated from the gear pump. Thus, the fluid pressure in the collector is equivalent and/or a little more than the control poppet valve which acts as a regulator for oil pressure.

At first, the hydraulic system circuit is fully bled and the piping between the pieces is completely filled with hydraulic oil and also the level of hydraulic oil in the carter (where the pieces are deployed) is increased up to display gauge. By circulation of the hydraulic pump, the required pressure is supplied and after passing the inner regulator, it exits from the other side of the regulator.If the pressure in the oil outlet system increases due to the increase in the pressure inside the pump and/or since the oil could not move in its path, the above mentioned regulator which is a kind of needle valve, pours the extra oil into the cater from the lower part. The oil exiting the regulator is divided into two parts by the branching fittings and enters connectors 1 and 3 of the rotary oil dividing gate system. Connectors 6 and 8 are located across from the rotary oil dividing gate and cells 1 and 3. Both connectors No. 6 and 8 are connected to a three-way with a particular piping. This three-way leads out the pressure resulted from the oil entering into the connectors 6 and 8 using the embedded fittings to the outside of carter via the shell. The reason why the oil pressure is divided into two parts after exiting the regulator and passing the two ducts of the rotary oil dividing gate cylinder and is assembled into one duct on the other side of the rotary oil dividing gate system is to be able to send rotary oil dividing gate valve of two periodic pulses of the oil towards the diaphragm for each cycle of the shaft. In case that more fluctuations of the diaphragm are needed for each rotation cycle of the rotary oil dividing gate, the number of branches derived from the pathway after the inner regulator could be reduced to only one tube and also consider only one exit path of rotary oil dividing gate valve for sending the positive pressure to the back of diaphragm. High pressure oil after passing the carter walls via the available fittings enters a secondary regulator in the outer side of the carter on which a barometer displays the pressure of high pressure oil transmission line.

If the outer regulator is set fixed on a certain pressure, the remainder of the oil would probably enter the tank from the regulator outlet and through the carter wall. A debit adjustment valve on the path of oil transmission line adjusts the amount of oil transmitted to the back of the diaphragm.The high pressure oil entering the tank on back of the intermediate diaphragm, compresses forthsome sort of fluid in the spacer between the intermediate diaphragm and the main diaphragm. Meanwhile, due to the movement of the fluid enclosed in between the two diaphragms, the main diaphragm is also driven forth. Now the rotary oil dividing gate is designed in a way that the outlet pipe of oil is totally closed and no oil could escape from the spacer tank on the back of the diaphragm. By rotation of the rotary oil dividing gate, connection No. 2 finds its way to the connector No. 7 via the embedded duct. The connector No. 7 is connected to the entry part of hydraulic pump valve via a pipe connected to the three-way and when the suction path of hydraulic oil is established in the motive system, the current pump would constitute an enclosed cycle. An oil refining filter on the carter shell enables the connector No. 5 to be connected to the filter. On the other side of the fitting, the pipe branched from the suction pathway, enables the oil to be sucked through the filter and consequently refined and sent to the entry of hydraulic pump. Also a third branch of the collector of the suction part which is connected to connection No. 9 of the rotary oil dividing gate system, enables transmission of pressure or the suction status in the collector leading to the hydraulic pump towards the connector on the other part. The connector No. 4 is connected to some kind of expansion tank out of the carter shell via a pipe. This expansion tank is particular circumstances which is equipped with some kind of plastic bubble within along with compressible gas. Thus, in case the pressure of entering fluid increases, the plastic bubble would be compressed and decompressed when the pressure is decreased. By embedding this expansion tank, we can fix some of the tolerance which may be present in the pressure within the collector in the suction part of the hydraulic pump. In the upper part of the carter, an iron cast door enables perfect sealing and prevents oil leakage.The back and forth movement of the diaphragm in the shell of dosing pump enables movement of the fluid.The iron cast body of the pump is located on the metal chassis along with the electromotor and side belongings. This chassis could be built from metal gutters and / or any other cross sections. The gearbox moving the rotary oil dividing gate is connected to the iron cast wall of the pump via flange screws.

On the end of the cylinder in the center of the rotary oil dividing gate a tetramerous turbine drives the hydraulic oil in the carter. Due to high pressure on the hydraulic oil during pump function, the increase in the hydraulic oil temperature is inevitable and hencenetwork of round trip pipes on the carter floor enables cooling fluids to pass through the carter.The applications of such pump may include the fluids transmission structures and especially viscous fluids.

In other words, the dosing pump for transmission of fluids with hydraulic driving force consists of: at least a pump for creating the hydraulic force, a regulator for pressure adjustment, a rotary oil dividing gate system for hydraulic oil, a system for pressure display, a regulator for outer pressure adjustment, a valve for debit control, an intermediary diaphragm, an intermediary fluid to transfer the force, an isolated polymer diaphragm, a diaphragm hosing pump structure equipped with going round poppet valve, a cooling coil, an iron cast carter equipped with iron cast cap with especial sealing, display gauge for hydraulic oil in the carter and electromotor, force transfer system, gearbox, metal chassis, a body for the pump which may be built from iron cast and/or aluminum and/or polymer compound and/or any other robust material, an electromotor generating the motive force which may be single phase, three phase, AC and/or DC and/or stepper motor and/or hydraulic turbines and/or pneumatic turbines and / or any other system for creating the motive force, an electromotor which should be directly connected to the hydraulic pump via a polymer coupling, a hydraulic pump installed on the main pump body and provides access for the motive force from outside of the pump, an electromotor generating the motive force equipped with some kind of pulley to transfer the movement, a motive force transferred by the electromotor pulley using some grooved belt, grooved flat and/or any other belt or chain and/or a series of gears to the gearbox, a motive force transferred to the gearbox which rotates the rotary oil dividing gate cylinder, a rotary oil dividing gate with some side holes and also some holes on the central axis and some paths embedded on the rotary oil dividing gate cylinder which may be different based on the design and number of diaphragms and pump frequency, a rotary oil dividing gate from an outer cylinder in which a cylinder with less diameter from Babbitt and in the Babbitt cylinder there is a steel and fully polished cylinder, a rotary oil dividing gate which has a connection flange to the pump shell, a central axis of the rotary oil dividing gate which is isolated by radial shaft sealing and/or any other sealing with a rotary oil dividing gate cylinder in its inner part and some kind of turbine on the central axis to create movement flow in the oil flowing in the carter and also the high pressure flow of hydraulic oil which enter the collector after exiting hydraulic pump via metal and/or polymer piping with the power to endure such pressure and the high pressure oil in the collector is divided into two or more parts.

Each of the collector’s outlets are connected to a passage way of the rotary oil dividing gate cylinder and by rotation of the rotary oil dividing gate system axis, in turns and based on the timing of the holes on the rotary oil dividing gate axis exits from the connectors on the other side and the high pressure output flow after exiting rotary oil dividing gate cylinder’s connectors enter a collector equipped with a single output and also the high pressure oil outputted from the secondary collector passes the pump shell via certain fittings and enters the other side of the diaphragm from the transmission line. This high pressure oil also passes a barometer, and at least one external regulator and one debit control valve in its way to the diaphragm. The high pressure oil outputted from the debit control valve enters the pump tank using the piping and then to the back side of the tank containing the intermediary diaphragm. Due to high pressure of the hydraulic oil in each pulse, the intermediary diaphragm is driven back and forth. A fluid with high pressure endurance is used between the intermediary and main diaphragm which is in contact with the fluid used for transmission. This fluid and barometers and other sensors help to use the pressure drop of the intermediary fluid as a measurement index for health of the diaphragms. The spacer cylinder in between the two diaphragms is connected to the walls of diaphragm tank and sealed with a special sealing which is usually O-ring to reduce the leakage of each of the fluids to the outer part of the spacer in case of any ruptures. The spacer equipped with the O- ring which is in the back of the diaphragm enables isolation and prevention of oil leakage out of the pump tank and/or probably the pumping materials entering the pump due to a rupture in the diaphragm. By rotation of the rotary oil dividing gate, the oil flowing in the back of the diaphragm finds its way to the suction part of the hydraulic pump and enters the return cycle.The suction part of the hydraulic pump is connected to the rotary oil dividing gate and by opening the suction channel, it is possible to suck the hydraulic oil in the back of the diaphragm. The suction part of the hydraulic pump is equipped with some kind of collector named connective suction collector which is connected to one of the channels of the rotary oil dividing gate which connects to the filter center embedded on the pump shell on the other side of the rotary oil dividing gate channel in the cycle timing in a proper time and location using the piping and by creating negative pressure, leads the consumed oil into the filter to be filtered. One of the channels leading to the suction collector is connected to the rotary oil dividing gate somehow under pressure expansion tank using the connection on its front side and this expansion tank includes also a rubber tube of under pressure gas. The expansion tank possesses the power to correct the pressure of the suction collector and in case of extreme increase and/or decrease in the pressure enables the returned oil to be used in the pump which is equipped with some kind of steel chassis to install electromotor, pump shell, gearbox and also polymer diaphragm. Since ant- corrosion materials are used as input and output, the pump is also capable of transmission of corrosive liquids. Diaphragm dosing pump may be built from polymer and/or composite and/or any other robust flexible and anti-corrosion material.

BRIEF DESCRIPTION OF THE DRAWINGS:

Figure 1 depicts the iron cast body of diaphragm pump along with its cap which is clear in the front side of the body where the diaphragm is located and on the upper side the place for adding oil can be seen.

Figure 2 represents diaphragm pump chassis along with the idlers associated with force translation belt to the gearbox.

Figure 3 depicts the piping system and its fittings.

Figure 4 represents the cooling coil.

Figure 5 depicts the rotary oil dividing gate which has a propeller on its top to stir the oil in the oil tank. Figure 6 represents expansion tank.

Figure 7 depicts the hosing diaphragm with the input and output flange.

Figure 8 depicts different elements and components of the pump as the following:

1. Body

2. Rotary oil dividing gate

3. Gearbox

4. Piping

5. Cooling coil

6. Chassis

7. Hosing diaphragm

8. Expansion tank

9. Hydraulic pump

10. Coupling

11.Electromotor

THE INNOVATION (INVENTIVE STEP):

The innovation in the invention of this pump in comparison with the similar pumps is in the first place the ability to quickly change debit and pressure together in a wide range and also simple function and removing the abrasive and high friction parts and also the sealing (packing) system, reducing the leakage to zero and repairs.

Also hydraulic system is used instead of gearbox to move the diaphragm pumpis another innovation of this invention. This pump is designed such that the moving parts of the device are floating in the oil which prevents friction in the device.

Also thermal variations have no effect on the efficiency of the device.

INDUSTRIAL APPLICATION OF THE INVENTION:

The current invention is used in the mechanic industry such as fluid mechanics and chemical industries as a pump with certain debit.