AT522820A1 - Pumping device - Google Patents

Abstract

A pumping device (1), in particular for pumping water, comprises at least a first cylinder (2A) and a second cylinder (2B), in each of which a piston (3) with a piston rod (4) connected to it is displaceably guided. Each of the cylinders (2A, 2B) has a front end (5) and a rear end (6). The piston rods (4) emerge from the cylinders (2A, 2B) at the rear end (6) and are coupled to one another in such a way that the piston (3) of one of the cylinders (2A, 2B) can be displaced to the rear end (6). this cylinder (2A, 2B) causes a displacement of the piston (3) of the other cylinder (2B, 2A) towards its front end (5) and vice versa. In each case in the area of the rear end (6), at least one line connection (17) leads into each of the cylinders (2A, 2B). A working fluid (9), to which heat can be supplied in the area of the front end (5) via a heating device (11), is accommodated in the cylinders (2A, 2B) between the piston (3) and the front end (5). The supply of heat is controlled by a control device (25) in such a way that the supply of heat to the working fluid (9) of one cylinder (2A, 2B) is interrupted, while heat is supplied to the working fluid (9) of the other cylinder (2B, 2A) will, and vice versa.

Description

.. ".. 20" 00 "00" "oo The invention relates to a pumping device, in particular for pumping water, with at least one first cylinder and a second cylinder, in each of which a piston with a piston rod connected thereto is displaceably guided, with each of the cylinders has a front end and a rear end, the piston rods emerging from the cylinders at the rear end and being coupled to one another in such a way that a displacement of the piston of one of the cylinders towards the rear end of this cylinder moves the piston of the other cylinder caused to its front end and vice versa, and in each case in the area of the rear end

at least one line connection leads into each of the cylinders.

Double piston pumps are generally known and, unlike single piston pumps, ensure a substantially continuous flow of liquid when pumping a liquid. Since the pistons in two cylinders are displaced in opposite directions, the pump fluid is alternately sucked into one of the cylinders, while the fluid is sucked in from the other cylinder

any pump liquid located is pressed out.

In conventional double piston pumps, the piston rods connected to the pistons are moved back and forth in the opposite direction via a drive. The drive can be done manually, for example by a hand lever mechanism, or via a

Motor, for example an electric motor, take place.

Pumps that can be operated independently, i.e. without being connected to a power grid, are used in a wide variety of areas. For example, they are used in irrigation systems in which the pumps are used to draw in water via a pipe system from a reservoir, e.g. a tank, a lake or the groundwater, and to plants via a distribution device

to be dispensed or distributed over an area.

Hand-operated pumps are essentially self-sufficient, the operation of such pumps being physically strenuous and the presence of a person operating the pump on site

demands.

Autarkic pumps operated by motors such as electric motors or internal combustion engines require an independent power supply, which makes them relatively unsuitable for continuous operation over several days or weeks. In addition, such motors are prone to failure and must therefore be carried out on a regular basis

Intervals.

The invention is therefore based on the object of providing a pump device of the type mentioned at the beginning which does not have the disadvantages of the prior art. In particular, a pump suitable for continuous operation is to be provided that automates, but without the

Use of a fault-prone motor, can be operated.

This object is achieved according to the invention with a

A pumping device having the features of claim 1.

Preferred and advantageous embodiments of the invention are

Subject of the subclaims.

According to the invention it is provided that a working fluid, to which heat can be supplied in the region of the front end via a heating device, is received in the cylinders between the piston and the front end, and that the supply of heat is controlled by a control device in such a way that the Heat supply to the working fluid of one cylinder is interrupted, while the working fluid of the other cylinder heat

is fed, and vice versa.

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The fact that heat is supplied to the working fluid in one of the cylinders expands the latter, so that the piston of the cylinder is pushed from the front end to the rear end. By coupling the pistons, the piston of the other cylinder is pushed from the rear to the front end at the same time. By alternately only supplying heat to the working fluid of one of the cylinders, while the supply of heat to the other cylinder is interrupted, the double pump can operate without the aid of an additional motor or a person operating the pump

operate.

When the piston is moved towards the rear end, an overpressure is created in the part of the cylinder between the rear end and the piston. Pump liquid that is located in this section of the cylinder is pressed out of the line connection or one of the line connections. When the piston is moved towards the front end, a negative pressure is created between the rear end and the piston. As a result, pump liquid is passed through the line connection or one of the line connections in

sucked in the cylinder.

In the context of the invention, an embodiment is particularly preferred in which the control device is coupled to the pistons or piston rods in such a way that the supply of heat to the working fluid of this cylinder is interrupted in each of the cylinders when the piston guided therein is moved to the rear end and when the cylinder is moved Piston to the front end of the heat supply is released. By means of such a control, the pump device can essentially

continuous pumping operation. It is also possible within the scope of the invention that the control of the

The supply of heat is independent of the position of the piston.

For example, the supply of heat can be periodic, i.e. one

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4th

following a certain time cycle between the cylinders

switch.

Embodiments are particularly preferred in which the heating device provides the heat with the aid of solar energy. As a result, the pumping device can be operated completely self-sufficiently over long periods of time. It is particularly advantageous if the pump device according to the invention is used in an irrigation system, since a lot of irrigation has to be carried out in the event of strong solar radiation, but at the same time enough solar energy is available for the

to cover the necessary energy requirements.

Embodiments are also possible within the scope of the invention in which the heating device provides the heat instead or in addition with the aid of wind power, e.g. via a wind turbine, and / or water power, e.g. via a water wheel, and / or geothermal energy. The advantage of all these embodiments is the independence from the power grid and the resulting therefrom

Can be used in different geographical locations.

According to an advantageous embodiment it is provided that the heating device has an electrically operated heating element arranged at the front end of the respective cylinder, and that the power supply to the heating element can be interrupted or produced by the control device. This has the advantage that the supply of electricity and thus also of heat, for example via switches, can be interrupted quickly and without great structural effort or additional moving components. Heating elements can heat up very quickly and also cool down again quickly, so that a pumping device according to this embodiment is included

relatively high pumping frequency can be operated.

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For example, the heating element has a heating coil arranged at or in the front end, which is fed with electrical current from outside the cylinder (e.g. generated with the aid of solar cells) and which is filled with the working fluid

Inside of the cylinder protrudes.

In the context of the invention it is also possible for the heating element to supply heat to the working fluid with the aid of high-frequency oscillation (s) (in particular ultrasound). For this purpose, the heating element has, for example, an oscillating element which can be arranged in the area of the working fluid or can be brought into contact with the working fluid and which can be made to oscillate in such a way that heat is thereby supplied to the working fluid. With such heating elements, the working fluid, for example with the supply of solar energy

electric current, heating very effectively and quickly.

According to a further advantageous embodiment it is provided that the heating device has a movable heating element which can be arranged at the front end or removed from the front end by the control device. The working fluid can thus be supplied with heat from the heating element via the front end, wherein the supply of heat can be interrupted by removing the heating element. The heating element of a pump device embodied in this way can be heated, for example, electrically (in particular via solar power) or thermally (in particular via water warmed up with sun rays). The advantage of this embodiment is that the heating element does not have to be specially heated and cooled, and that heat is supplied to the working fluid very quickly by arranging and removing the heating element at the front end

or the heat supply can be interrupted.

According to yet another advantageous embodiment

provided that the heating device of each cylinder

has at least one collecting element with which the sun's rays can be fed to the front end in a bundled or concentrated form. As a result, the cylinder is heated in the area of its front end and heat is supplied to the working fluid. The supply of solar rays - and thus the provision of heat to the working fluid - can be interrupted by the control device. It is particularly advantageous that such an embodiment only rarely needs to be serviced because

it is hardly prone to errors or defects.

The collecting element is, for example, a concave mirror that focuses the sun's rays onto the front end. It is also conceivable that the collecting element is a lens that focuses the sun's rays on the front end. To interrupt the heat supply, the control device can place a shield or screen between the mirror or lens and the front end, e.g. by pivoting the shield. However, it is also conceivable that the mirror or the lens itself is adjusted, e.g. pivoted, so that the sun's rays

cannot be directed towards the front end.

The heating device can also have several mirrors or lenses or a combination of mirrors and lenses. Furthermore, the sun's rays do not necessarily have to be fed directly to the front end, but can, for example, be a liquid in one connected to the front end

Warm up the liquid circuit.

Within the scope of the invention, the control device can be mechanically coupled to the pistons or piston rods, in particular via a linkage and / or gears and / or belts and / or a cable pull. Such connections are particularly robust

against environmental influences and durable.

However, it is preferred - in particular when the heat is generated via electrical energy - if the control device is electrically or electronically coupled to the pistons or piston rods. Such connections react particularly quickly, can be regulated precisely and do not require any additional moving parts that wear out faster and create one

require additional energy input.

The control device can also drive servomotors that e.g. switch switches on or off or shields on or off

fold out.

In particular, within the scope of the invention, an embodiment is preferred in which a cooling device is arranged at a distance from the front end at or around each of the cylinders, with which heat can be extracted from the working fluid. Preferably, the cooling device is at least a quarter or a third of the total length of the cylinder from its front end. As a result, the piston first has to travel a certain distance in the direction of the rear end before the working fluid comes into contact with the section of the cylinder wall cooled by the cooling device. The cooling device allows heat to be extracted particularly quickly from the heated and thereby expanded working fluid, so that it cools down more quickly and contracts more quickly or is compressed with less effort

can be.

The cooling device of each cylinder has, for example, at least one line which surrounds the respective cylinder and through which a cooling liquid is passed. This cooling liquid can be part of the pump liquid which is passed through the cooling devices when the pump liquid is pressed out of the cylinders. Additionally or instead

the cooling device can have cooling fins.

Embodiments are preferred in which the working fluid is at least partially gaseous when the heat is supplied and at least partially liquid when the heat is withdrawn. For example, the working fluid can be a substance which is liquid at room temperature and which evaporates when heat is supplied and changes to a gaseous state. Such fluids have a high thermal expansion and can be well in the liquid state

fill the cylinders or save them in the cylinders.

Embodiments are also preferred in which the working fluid is essentially liquid when the heat is supplied and removed or in which the working fluid is

supplied and withdrawn heat is essentially gaseous.

In the context of the invention, the working fluid can be a pure substance, for example an essentially pure substance that is liquid at room temperature, a pure gas or a mixture of two or more substances (gas mixture, dispersion,

Liquid mixture).

A negative pressure preferably prevails in the cylinder between the piston and the front end when the piston of the respective cylinder is arranged in an end position in the region of the front end and the working fluid is in an unexpanded state. When a liquid is used as the working fluid, this lowers the boiling point of the liquid. In addition, the negative pressure supports the movement of the piston towards the front end. If, in such a pumping device, heat is withdrawn from the heated and therefore expanded working fluid of one cylinder, it contracts (for example when changing from the gaseous to the liquid state of aggregation). The pressure formed in the working chamber of this cylinder is thereby reduced further and further until a negative pressure is created in the working chamber. The piston of this

The cylinder is then not only driven by the (via the piston of the

other cylinder and the coupled piston rods transferred to it) pressure force of the expanding working fluid of the other cylinder, but also by the ambient pressure (which is higher than the negative pressure in the working chamber of the cylinder) from the rear to the front end of the cylinder. The pumping device can therefore pump faster and more effectively

become.

So that a chamber is formed between the piston and the front end of the cylinder, the piston is in its end position in the area of the front end - that is, in a position in the cylinder in which the piston cannot be moved further towards the front end - not directly on the front end. For this purpose, for example, an inner shoulder can be provided in the cylinder, against which the piston rests in its end position. However, it is also possible within the scope of the invention that the piston rod (e.g. due to a transverse flange arranged thereon) can only be retracted into the cylinder up to a certain length. In this embodiment it is possible to first fill the working fluid into the cylinder, then to pull the piston rod a little out of the cylinder in order to create a negative pressure between the piston and the front end, and then the piston rod against one

possible retraction into the cylinder.

Furthermore, it can be provided within the scope of the invention that the cylinders are aligned in the same way, in particular arranged next to one another. Aligned identically in the context of the invention means that the front end of one cylinder is arranged on the same side as the front end of the other cylinder. With such an arrangement, the cylinders only have to be supplied with heat from one side, for example

become.

10

It can also be provided within the scope of the invention that the cylinders are aligned in opposite directions, in particular arranged in a line. With such an arrangement, the piston rods can be coupled to one another particularly easily (e.g.

directly).

It is preferred if the piston rods are coupled to one another via a movable linkage and / or gears and / or belts and / or a cable pull. Such a coupling enables the pistons to be moved in a simple manner, in particular in the case of cylinders arranged next to one another

or piston rods in opposite directions.

In a further embodiment, the piston rods are coupled directly to one another via an essentially rigid coupling or a rigid linkage, or in each case a partial section of a single piston rod connecting the pistons of both cylinders. In particular when the cylinders are arranged in a line, a coupling mechanism can be used

additional moving parts can be dispensed with.

In the context of the invention it can be provided that a single line connection is present per cylinder, to which an intermediate line is connected. The intermediate line can be connected (e.g. via a flow switch) to a feed line through which a pump liquid can be sucked in and a discharge line through which the pump liquid can be discharged. However, it can also be provided that at least two line connections are present. In such an embodiment, one of the line connections has a supply line through which a pump liquid can be sucked in, and the other of the line connections has a discharge line through which the pump liquid can be drawn off.

connectable.

11

A first check valve preferably blocks the feed line when the piston is moved to the rear end, and a second check valve blocks the discharge line when the piston is moved to the front end. Such check valves are cheaper and require less maintenance than controlled valves. The valves can, for example - if present - in the intermediate line, in the outflow and supply line or, if necessary, in the line connections

be arranged.

In the context of the invention, embodiments are also conceivable in which the piston rods are mechanically connected to at least one further device in such a way that this further device can be driven or operated by the movement of the piston rods. The further device can be, for example, a rod pump, with the aid of which water or another liquid can be conveyed to the surface from a great depth (for example from a depth of over 100 m). It is also conceivable that the further device is a generator for

Generating electricity is.

The invention also relates to an irrigation device which has at least one pump device according to the invention. Furthermore, the irrigation device has at least one supply line via which the pump device (s) can be connected to a water reservoir, at least one water distribution device and at least one discharge line via which the pump device (s) with the water distribution device (s)

is / are connected to.

The water reservoir can for example be a pond, a lake, the

Groundwater or an artificial tank or basin. It is preferred if the irrigation device is at least one

Has solar panel for generating electrical power. Of the

The electricity thus obtained can be used in particular to operate the

12

Control device and / or the heating device, but also for monitoring or control electronics and / or for charging a

Buffer stream storage can be used.

In the context of the invention, a method for operating a pumping device can also be provided, this method selected or all of the features of an inventive

Pump device - as described above - may have.

Further details, features and advantages of the invention emerge from the following description with reference to the attached drawings, in which preferred

Embodiments are shown. It shows:

1 shows a side view of the pump device according to the invention according to a first embodiment,

FIG. 2 shows a plan view of the pump device according to the invention of FIG. 1 cut along the sectional plane .II-II,

3 shows a side view of the pump device according to the invention according to a second embodiment,

4 shows a plan view of the pump device according to the invention of FIG. 3 cut along the sectional plane IV-IV,

5 shows a side view of the pump device according to the invention according to a third embodiment, and

6 shows a longitudinal section through the

pumping device according to the invention of FIG. 5.

1 and 2 show a pump device 1 according to the invention according to a first embodiment, in which the heat necessary to operate the pump device 1 is obtained with the aid of solar power

provided.

13

The pumping device 1 has a first cylinder 2A and a second cylinder 2B, which are essentially aligned in the same way and arranged to run parallel to one another. In each of the cylinders 2A, 2B, a piston 3 is guided, each with

an associated piston rod 4 is connected.

Each of the cylinders 2A, 2B has a front end 5 and a rear end 6, with a respective working chamber 7 between the piston 3 and the front end 5 and a pump chamber 8 between the piston 3 and the rear end 6

is formed.

A working fluid 9 is accommodated in the working chamber 7 of each cylinder 2A, 2B and expands when heat is supplied, the respective piston 3 towards the rear end 6

shifts and thus increases the volume of the working chamber 7.

In the area of the front end 5, an inner shoulder 10 is formed in the cylinder 2A, 2B, on which the piston 3 rests in its end position - in which it cannot be pushed further towards the front end 5. The working chamber 7 of a cylinder 2A, 2B thus has when the piston 3 is in the

End position, the smallest possible volume.

The working fluid 9 can be supplied with heat via a heating device 11 provided for this purpose in the region of the front end 5 of each cylinder 2A, 2B. In the embodiment shown, the heating devices 11 have electrical heating elements, the heating coils 12 of which protrude into the working chambers 7. The heating devices 11 - and thus the heating coils 12 - are supplied with electrical current via power connections 13 so that the current flows through them

Heating coils 12 supply heat to the working fluid 9.

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14th

The power connections 13 are via power lines 14 with a

Solar panel 15 that generates solar power connected.

The piston rods 4 of the cylinders 2A, 2B are coupled to one another via a pivotable linkage 16 in such a way that when one piston rod 4 is extended, the other piston rod 4 is automatically retracted and vice versa. Correspondingly, the piston 3 of the first cylinder 2A also moves towards the front end 5 when the piston 3 of the second cylinder 2B is pushed by the expanding working fluid 9

is shifted to the rear end 6 and vice versa.

The pump chamber 8 of each cylinder 2A, 2B has two line connections 17. One of the line connections 17 is connected via a feed line 18 to a liquid reservoir, in particular a water reservoir 19, of a pump liquid 20. The other line connection 17 is in each case via a discharge line 21 with a liquid distribution device, in particular a water distribution device 22, for distribution

or delivery of the pump liquid 20 connected.

The line connection 17 connected to the supply line 18 has a non-return valve which prevents pump liquid 20 from flowing out of the pumping chamber 8 into the supply line 18. In contrast to this, the line connection 17 connected to the discharge line 21 has a non-return valve, which prevents pump liquid 20 from the discharge line 21 from entering the pump chamber 8

can be sucked.

Each of the cylinders 2A, 2B is encased by a cooling device 23, which is spaced from the front end 5 of the cylinder 2A, 2B. Thus, the piston 3 first has to travel a certain distance from the front end 5 to the rear end 6 of the cylinder

2A, 2B are moved out so that the working chamber 7 is up

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15th

to the cooling device 23 and are cooled by this

can.

The cooling devices 23 are connected to the discharge line 21 via a cooling line 24 or directly into the discharge line 21

integrated.

An electrical control device 25 is coupled to the piston 3 or piston rod 4, so that the power supply for the heating device 11 of each cylinder 2A, 2B is interrupted as soon as the piston 3 of this cylinder 2A, 2B is moved into the area of the rear end 6. For example, the control device 25 can have sensors to measure how far the respective piston rod 4 is extended out of the cylinder 2A, 2B

is.

A pumping process is running with the pumping device according to the invention

e.g. as follows:

The piston 3 of the first cylinder 2A is arranged in its end position at the front end 5 of the first cylinder 2A and rests against the inner shoulder 10. The working fluid 9 is in a liquid, essentially unexpanded state in which it

does not put pressure on the piston.

Heat is supplied to the working fluid 9 of the first cylinder 2A via the heating device 11 of the first cylinder 2A, so that

this at least partially evaporates and expands.

The piston 3 of the first cylinder 2A is displaced in the direction of the rear end 6 of the first cylinder 2A due to the excess pressure in the working chamber. As a result, the pump liquid 20 received in the pump chamber 8 is carried by the

Derivation 21 connected line connection 17 from the pump chamber

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16

8 pressed out, and over the derivation 21 and the

Cooling devices 23 passed to the water distribution device 22.

At the same time, the piston rod of the first cylinder 2A moves out of the first cylinder 2A, so that the control device 25 supplies the power to the heating device 11 of the first cylinder 2A and thus also the supply of heat to the working fluid 9 of the first

Cylinder 2A interrupts.

By moving out the piston rod 4 of the first cylinder 2A, the piston rod 4 of the second cylinder 2B is moved into the second cylinder 2B via the pivotable linkage 16

driven in.

When the piston rod 4 of the second cylinder 2B is moved in, the piston 3 in the second cylinder 2B is displaced in the direction of the front end 5 of the second cylinder 2B, as a result of which a negative pressure is created in the pump chamber 8 of the second cylinder 2B. Due to this negative pressure, the pump liquid 20 is transferred from the water reservoir 19 into the pump chamber via the supply line 18, which is connected to one of the line connections 17

8 of the second cylinder 2B is sucked into it.

When the piston 3 of the second cylinder 2B is in its end position in the area of the front end 5 of the second cylinder 2B, the control device 25 provides the previously interrupted power supply for the heating device 11 of the second cylinder 2B

again.

As a result, heat is now supplied to the working fluid 9 of the second cylinder 2B and the pumping process described runs in the same way as described, only in the reverse order.

from.

17th

So that the working fluid 9 in the cylinders 2A, 2B cools more quickly in the expanded state and the respective piston 3 can be moved more quickly back to the front end 5 of the respective cylinder 2A, 2B, heat is extracted from the working fluid 9 via the cooling devices 23 as soon as the respective working chamber 7 has a predetermined volume or a predetermined one

Has reached size.

3 and 4 show the pump device 1 according to the invention according to a second embodiment, in which the heat required to operate the pump device 1 is obtained with the aid of

Sun rays 26 is generated.

The pump devices 1 of the first and the second embodiment are essentially constructed in the same way, but differ in the design of FIG

Heating device 11 and the control device 25.

The heating devices 11 of the pump device 1 shown in FIGS. 3 and 4 have lenses 27, with the aid of which sun rays 26 can be focused onto the front ends 5 of the cylinders 2A, 2B. Each cylinder 2A, 2B is for it

at least one lens 27 is assigned.

In this embodiment, the front end 5 of the cylinders 2A, 2B has a particularly high thermal conductivity, so that the working fluid 9 in the cylinders 2A, 2B receives a large part of the heat generated by the bundling of the solar rays 26

can be fed.

In the embodiment shown in FIGS. 3 and 4, the control device 25 has, per cylinder 2A, 2B, a control mechanism 28 coupled to the piston rods 4 and a; pivotable shield 29. When extending the

Piston rod 4 from cylinder 2A, 2B becomes the respective

18th

The shield 29 is pivoted between the front end 5 of the cylinder 2A, 2B and the associated lens 27, so that no sun rays 26 can strike the front end 5 and heat it. The heat supply to the working fluid 9 des

affected cylinder 2A, 2B is thus prevented.

The control mechanism 28 Each cylinder 2A, 2B comprises in the illustrated embodiment a linkage 28 coupled to the piston rods 4, which with the aid of toothed rails 31 and a gear wheel 32 is opposite to the piston rod 4 of the

corresponding cylinder 2A, 2B is moved.

In the embodiments shown in FIGS. 1 to 4, the pumping device 1 is shown as part of an irrigation device. However, it is also possible that the pump device 1 is part of another liquid system, for example a drinking water supply, a

Oil circuit, a bathing water circuit, etc. is.

FIGS. 5 and 6 show the pump device 1 according to the invention according to a third embodiment. In this embodiment, too, the heat required to operate the pumping device 1 - as in the embodiment shown in FIGS. 1 and 2 - is generated with the aid of solar electricity,

Solar panel 15 is obtained, provided.

In this embodiment, the cylinders 2A, 2B of the pump device 1 are aligned in a line and opposite to one another, so that the rear end 6 of each cylinder 2A, 2B

toward the rear end of the other cylinder 2B, 2A. The piston rods 4 of the pistons guided in the cylinders 2A, 2B

3 are connected to each other and form a single joint

Piston rod 4.

19th

When the common piston rod 4 is displaced out of one of the cylinders 2A, it is pushed directly into the other cylinder 2B and vice versa, without any need for it

pivotable linkage 16 is required.

The control device 25 has a common control mechanism 28 coupled to the piston rod 4, which with the

Heating devices 11 of both cylinders 2A, 2B is connected.

The heating device 11, which is assigned to that cylinder 2A, 2B, from which the common piston rod 4 is pushed out, is removed from the cylinder 2A, 2B, in particular lowered. The supply of heat to the working fluid 9 of these cylinders 2A, 2B is thus prevented. At the same time, the heating device 11 assigned to the other cylinder 2B, 2A is brought up to this other cylinder 2B, 2A into which the common piston rod 4 is pushed, in particular raised. The heating device 11 can thus transfer heat to the working fluid 9 of the other cylinder

2b, 2A submit.

The common control mechanism 28 of the cylinders 2A, 2B comprises, in the embodiment shown, a linkage 30 with chains coupled to the common piston rod 4 which, with the aid of toothed rails 31 and a gear wheel 32, is opposite to the

common piston rod 4 is moved.

The invention is not restricted to the illustrated embodiments. In particular, further embodiments are conceivable which have certain features of those shown in FIGS. 1 to 6

Combine pumping devices 1.

For example, a pumping device 1 according to the invention, in which the cylinders 2A, 2B, as in the embodiment shown in FIGS

are arranged, an electrical control device 25, as in

20th

Figs. 1 and 2 shown have. In such a pumping device 1, the heating devices 11 are preferably permanent on the front ends 5 of the cylinders 2A, 2B

arranged. The power supply to the heating devices 11 is provided by the electrical control device 25 - depending on the position

the common piston rod 4 - interrupted or released.

21736

21 LIST OF REFERENCE NUMERALS 1 Pump device 2 (A, B) cylinder (first, second) 3 piston 4 piston rod 5 front end 6 rear end 7 working chamber 8 pumping chamber 9 working fluid 10 inner shoulder 11 heating device

12 heating coil

13 Stromarnischschluss

14 power line

15 solar panel

16 swiveling rods 17 line connection

18 supply line

19 water reservoir

20 pumping liquid

21 derivation

22 Water distribution device 23 Cooling device

24 cooling line

25 control device 26 sun rays

27 lens

28 Control Mechanics

29 Shielding 30 Linkage of the control device 31 Rack rails

32 gear

Claims (1)

22nd Patent claims: Pump device (1), in particular for pumping water, with at least one first cylinder (2A) and a second cylinder (2B), in each of which a piston (3) with an associated piston rod (4) is displaceably guided, each of the The cylinder (2A, 2B) has a front end (5) and a rear end (6), the piston rods (4) emerging from the cylinders (2A, 2B) at the rear end (6) and being coupled to one another in such a way that that a displacement of the piston (3) of one of the cylinders (2A, 2B) to the rear end (6) of this cylinder (2A, 2B) a displacement of the piston (3) of the other cylinder (2B, 2A) to its front end ( 5) and vice versa, and at least one line connection (17) in each of the cylinders (2A, 2B) in the region of the rear end (6), characterized in that in each of the cylinders (2A, 2B) between the Piston (3) and the front end (5) a working fluid (9), which in the area of the front end (5) over a heating device (11) heat can be supplied, and that the supply of heat is controlled by a control device (25) such that the supply of heat to the working fluid (9) of one cylinder (2A, 2B) is interrupted during the Working fluid (9) of the other cylinder (2B, 2A) heat is fed, and vice versa. Pump device according to Claim 1, characterized in that the control device (25) is coupled to the pistons (3) or piston rods (4) in such a way that in each of the cylinders (2A, 2B) when the piston (3) guided therein is moved to rear end (6) the supply of heat to the working fluid (9) of this cylinder (2A, 2B) is interrupted and when the piston (3) is moved to the front end (5) the Heat supply is released. 23 Pump device according to claim 1 or 2, characterized in that the heating device (11) the heat with the help of solar energy. Pump device according to one of Claims 1 to 3, characterized in that the heating device (11) has an electrically operated heating element arranged at the front end (5) of the respective cylinder (2A, 2B), and that the control device (25) supplies power can be interrupted or produced to the heating element. Pump device according to claim 4, characterized in that the heating element (11) is a heating coil (12) which can be heated with the aid of electrical current or a heating coil (12) which can be set into oscillation with the aid of electrical current Has vibrating element. Pump device according to one of Claims 1 to 3, characterized in that the heating device (11) has a movable heating element which can be arranged at the front end (5) by the control device (25) so that heat from the heating element via the front end (5 ) can be supplied to the working fluid (9), or by removal of the heating element, the supply of heat can be interrupted. Pump device according to one of Claims 1 to 3, characterized in that the heating device (11) has at least one collecting element, such as a concave mirror or a lens (27), with which sun rays (26) can be fed to the front end (5) so that the front end (5) is heated and gives off heat to the working fluid (9), and that the control device (25) allows the supply of sun rays (26) can be interrupted, in particular by a shield (29) 24/36 11. 12. 24 between the front end (5) and the collecting element is placed. Pump device according to one of Claims 1 to 7, characterized in that the control device (25) me in particular via a linkage (39) and / or cog and / or belt and / or a cable, or elect or electronically with the piston (3) or piston rod is coupled. Pump device according to one of Claims 1 to 8, characterized in that a cooling element (23) is arranged at a distance from the front end or around each of the cylinders (2A, 2B), with which the working fluid (9) is withdrawable. Pump device according to one of Claims 1 to 9, characterized in that the working fluid (9) is at least partially gaseous when the heat is added and at least partially liquid when the heat is withdrawn, or that the working fluid (9) is essentially gaseous when the heat is supplied and withdrawn or that the working fluid is substantially is liquid. Pump device according to one of claims 1 to 10, characterized in that in each of the cylinders (2A, 2B between the piston (3) and the front end (5) Negative pressure prevails when the piston (3) of each cylinder (2A, 2B) is in an end position in the area of the front end (5) and the working fluid is an unexpanded state. Pump device according to one of Claims 1 to 11, characterized in that the cylinders (2A, 2B) are the same Scanned on 12-09-2481! nt thus chanic, vein (32) ric pleasant (4) thereby (5) respect warmth thereby led ener as rme in uid (9) en thereby) some of the (9) in thereby 14th 15th 16. 17th Scanned on 12-89-2481 25th aligned, in particular arranged next to one another, or aligned in opposite directions, in particular in a line are arranged. Pump device according to one of claims 1 to 12, characterized in that the piston rods (4) via a movable linkage (16) and / or gears and / or Belts and / or a cable are coupled to one another. Pump device according to one of claims 1 to 12, characterized in that the piston rods (4) are coupled directly to one another via an essentially rigid coupling or a rigid linkage, or that the piston rods (4) are each a partial section of a single Piston rod (4) are. Pump device according to one of Claims 1 to 14, characterized in that there is a single line connection (17) per cylinder (2A, 2B) to which an intermediate line is connected, which is connected to a supply line (18) through which a pump liquid (20 ) and a discharge line (21) through which the pumping liquid (29) is derivable, connectable. Pump device according to one of Claims 1 to 14, characterized in that at least two line connections (17) are present, one of the line connections (17) having a feed line (18) through which a pump liquid (20) can be sucked in, and the other of the line connections (17) with a derivative (21) through which the pump liquid (20) can be diverted, can be connected. Pump device according to one of Claims 1 to 16, characterized marked that a check valve is the supply line (18) when moving the piston (3) to the rear end (6) 19th 20th Scanned on 12-89-2091 ‘ 26th blocked, and that another check valve opens the discharge line (21) when moving the piston (3) to front end (5) blocked. Pump device according to one of Claims 1 to 17, characterized in that the piston rods (4) are mechanically connected to at least one further device, such as a rod pump or a generator, in such a way that this further device can be driven by the movement of the piston rods (4) or operable is. Irrigation device consisting of at least one pumping device (1), at least one supply line (18) via which the pumping device (s) (1) can be connected to a water reservoir (19), at least one water distribution device (22) and at least one discharge line (21) , via which the pump device (s) (1) is / are connected to the water distribution device (s) (22), characterized in that the pump device (s) (1) according to one of claims 1 to 18 is / are trained. Irrigation device according to claim 19, characterized characterized in that they have at least one solar panel (15) for generating electricity.