DE3508950A1 - Hydropneumatic tubular pump for the hydraulic transportation of capsules - Google Patents

Abstract

A tubular pump for conveying capsules from a section of lower pressure into a section of higher pressure in a pipe by means of a transporting liquid, the superatmospheric pressure being maintained even in the event of a stoppage of operation - that is to say, when there is no longer any action of conveying pressure - without the need for mechanically actuated closing accoutrements.

Description

Hydro-pneumatic tube pump for the hydraulic

Capsule transport.

Description Hydro-pneumatic tube pump for the hydraulic capsule transport.

The invention relates to a tube pump with which capsules by means of a liquid conveyed through a pipeline and thereby lower from an area or atmospheric pressure can be brought to such a higher pressure. Of the pressure generated by the pipe pump according to the invention in the adjoining pipeline remains in place even if the flow no longer flows, i.e. when the system is idle - or business interruption; However, the device also makes possible the built-up Change or reduce pressure entirely.

To meet this requirement, it is known to use rotary valves (CH 502774, US 2760873, DE 2149122 C2) or chamber locks (DE 3121783 Al). However, these have the following disadvantages: High mechanical complexity and consequent expensive to manufacture.

- The rotation is continuous or incremental; it becomes driving energy needed; the seals and bearings are subject to wear, which is expensive Makes it necessary to keep spare parts (e.g. a complete airlock). Furthermore there es: downtimes, times for repairs and high maintenance costs.

- The rotor is opposite the housing only by means of a gap sealed, so there is always a leak between the fluid circuits to be separated on (when working wet) or relaxed steam escapes (when working dry).

- These locks are used for hydraulic pipeline transport always the weakest link in terms of system performance; only so many capsules can be conveyed through a pipeline by means of a liquid than the Lock allows. FerneXr there is always the risk of soft packaging Damage during containment The invention is the The task is based on capsules in a pipeline by means of a transport liquid to promote and they from a section of low or atmospheric pressure to be transferred into such a higher pressure without being in the cross-section of the conveying channel mechanically moving parts - such as cellular wheel or slide, flap or chamber locks or similar - must be installed. An additional task is to reduce the pressure, which is generated in the pipeline according to the device according to the invention, not only during the operating state - that is, when the liquid flow hits the capsule promotes - but also in the event of a standstill, - i.e. when the transport liquid does not flow -, remains. In this way it should be achieved that the Transport liquid according to the device according to the invention, if its temperature is above the saturation temperature of the liquid, cannot evaporate.

This object is achieved in that in the lower Area of a riser pipe compressed air is fed into the transport liquid. There is a pumping effect because, on the one hand, the specific weight of the carrier medium in the riser consisting of the liquid-air mixture compared to that of the Transport liquid is reduced and on the other hand because the in the transport liquid fed in and upwardly flowing air the transport liquid and ddmit also takes the capsules with it. For this purpose, there is a lower area of the riser pipe Arranged air inlet box through which the air is supplied to the transport liquid will. The air that has risen in the riser reaches the air cushion, which is in the upper area of the riser pipe and the adjoining downpipe has formed within the separation tank. At the top of the riser pipe is followed by a guide provided with liquid passages, which at the top leads to the beginning of the downpipe. This is designed to be open and preferably exists made of round bars and flat strips with a rectangular cross-section. This leadership is adapted to the capsule shape and provided with sufficient clearance so that the capsules neither become wedged in one another nor individually through self-locking in the guide come to a standstill.

The guide is usually semicircular and has the Task to divert or remove the capsules emerging from the riser into the downpipe. to convey in, whereby the capsule is separated from the liquid-air mixture of the riser pipe and falls into the water level of the downward flow in the downpipe, where they are taken by this one. The pressure of the compressed air cushion is dependent on the water level is automatically regulated by the liquid level. This pressure control ensures that the water level in the separator tank during operation fluctuates only within narrow limits, which causes the set in the downpipe Liquid column remains almost constant with the success that the hydrostatic through this Column in the direction of flow of the flow generated liquid pressure always in the same The order of magnitude works and is maintained.

A special feature of the invention is that at a standstill the sensor (s) which, during operation, indicate the too low water level of the Monitor the liquid level in the separation tank, switch to measuring sensors with the same task, but which are attached at the bottom of the riser pipe - that has As a result, so much air is blown into the separator tank when the machine is idle is up to the column of liquid with the smallest counterpressure, - that is the one in the direction of the inlet, i.e. the one in the riser pipe - to the lower part of the riser pipe is displaced. The liquid column in the downpipe ensures that the system pressure preserved. By arranging such pipe pumps connected in series with a subsequent downpipe, any high system pressure can thus be generated and be held at standstill.

The advantages achieved with the invention are in particular: that the entry of the capsules from a conveyor channel section of low pressure into a such a higher pressure is possible without mechanical locks or other Similar acting shut-off devices are located in the feed channel. Another advantage consists in the feature that a number of hydrostatic Columns shut off the pressurized area against the unpressurized area without any use of mechanically moved or actuated Shut-off valves.

Another major advantage is the very simple structure and the absence of any wearing parts; this means the lowest possible Expenditure for maintenance and repair as well as an optimum of system safety and System availability.

One embodiment of the invention is shown in the following figures shown and described.

It shows Fig. 1 4 pieces pipe pumps connected in series with connected Downpipe and closed compressed air circuit.

FIG. 2 like FIG. 1, but with a numerical example for operating pressures and static heights.

Fig. 3 like Fig. 1, but compressed air feed into the riser pipe highest Pressure and use of the excess compressed air for feeding into each previously installed riser pipe.

The invention is explained with reference to the drawings Structure and mode of operation.

In Fig. 1, capsules 2 are in a route section 14 lower or atmospheric pressure of the pipeline 3 floating in the transport liquid 5 conveyed to the first pipe pump 1 by a suction flow which passes through the feeding of compressed air 31 into the first riser pipe, seen in the running direction 4 is created. The compressed air 31 is via an air inlet box 9 in the lower Area of the riser pipe 4 fed. The compressed air 31 rises in the transport liquid 5 upwards, where it promotes this and the capsules 2 located therein upwards and potential energy is generated. The riser pipe 4 opens at its upper end into a separating chamber 8 in which the mixture of transport liquid 5 and compressed air 31 separated again and in which the flow rate is interrupted. The transport liquid 5 collects in the lower area of the cutting chamber 8 and flows down through the downpipe 16 while the compressed air 31 accumulates at the top of the sheath chamber 8. Here it comes through the suction line 20 to the compressor 10, which it via the pressure line 21 and via the air inlet box 9 feeds back into the lower region of the riser pipe 4. The amount of compressed air 31 and thus the delivery rate of the pipe pump 1 is set at the flow control valve 22, which is located in the pressure line 21 after the compressor 10, the need be adjusted.

The liquid level 6 in the separation chamber 8 is above the pressure of the air cushion 7 held at a certain level. The fluid level drops 6, for example, below its predetermined level, then this is determined by the sensor "Liquid level too low" notices and opens it with an electrical impulse Solenoid valve "air outlet" 28: compressed air 31 escapes, the pressure of the air cushion 7 becomes smaller and the liquid level 6 rises to the predetermined level; thereupon the solenoid valve "air outlet" 28 closes again. - However, is the fluid level 6 too high for some reason then this is indicated by the "liquid level" sensor too high ", whereupon the solenoid valve" air inlet "27 opens; the pressure in the air cushion 7 is increased and the liquid level 6 is back to its predetermined level lowered. In continuous operation, the specified level appears in the liquid level thus automatically, there is no air consumption. On the liquid level tube 29 can determine the level of the liquid inside the separation chamber from the outside 8 are controlled. The sensors 25, 26 are preferably located in this liquid level tube 29 arranged.

The capsules 2 are at the upper end of the riser pipe 4 by means of a arcuate guide 11, which is adapted to the shape of the capsule 2 provided with clearance is deflected around 1800 so that they get into the inlet 18 of the downpipe 16. So that the stream of transport fluid 5 breaks off in the area of the separation chamber 8 can, is the guide from the outlet 18 of the capsules 2 to the inlet 17 of the downpipe 16 provided with liquid passages, i.e. it consists of round bars and rectangular ones Flat bars, which are not shown.

The capsules 2 pass through the air cushion 7 and in the guide 11 get into the downward flow of the transport liquid 5 (with arrow shown) and are conveyed downwards by this and pass over the deflection bend 19 at the lower end of the downpipe 16 in the subsequent riser 4 of the next Tube pump. In this way, they go through the connected pipe pumps and kick after the last downpipe 16 in the section of increased pressure 15 a.

In the event of an interruption in operation, the "liquid level" sensor switches off too deep "25, which the liquid level 6 of the separation chamber 8 during the operating state adjusted to the sensor "liquid level too low" 26, which is in the lower Area of the riser pipe 4, i.e. it is through the solenoid valve "air inlet" 27 as much compressed air 31 is fed into the cutting chamber 8 as the transport liquid 5 in the direction of the section of low pressure 14 to the sensor "liquid level too deep "26 is displaced. In this way, the column of liquid in the downpipe exercises 16 a hydrostatic pressure from a higher pressure in the direction of the route section 15, thus this section 15 is maintained an overpressure without any mechanically operated closing elements are required.

In Fig. 2 is any numerical example for the operating pressures and for static heights of the liquid column as they occur in practice can.

In Fig. 3 another circuit is that for the compressed air supply shown. Instead of a compressor 10 for each individual pipe pump 1, compressed air is used 31 used from the network; it is by means of the air inlet box 9 on the Pressure line 21 with flow control valve 22 fed into the riser pipe 4. These Compressed air 31 is withdrawn again at the top of the cutting chamber 8 and into the riser pipe the upstream pipe pump 1 is fed.

If the pressure in the air cushion 7 is reduced, then the pressure in the Section 15 of the pipeline 3 also reduced (Fig. 1).

Index 1 pipe pumps 2 capsules 3 pipeline 4 riser pipe 5 Arrow for transport liquid 6 Liquid fluid in the separating chamber 7 Air cushion 8 Separation chamber 9 Air inlet box 10 Compressor 11 Guide 12 13 14 Route section lower pressure 15 section of higher pressure 16 downpipe 17 inlet 18 Outlet 19 deflection bend 20 suction line 21 pressure line 22 flow control valve 23 Line 24 "Liquid level too high" sensor 25 "Liquid level" sensor Too deep in the separation chamber 26 "Liquid level too deep" sensor in the riser pipe 27 "Air inlet" solenoid valve 28 "Air outlet" solenoid valve 29 Liquid level tube 30 pair of pipes 31 compressed air

Claims (5)

Claims 1. Device around capsules (2) which are in a pipeline (3) are conveyed by means of a transport liquid (5) from a section of the route transferring lower pressure (14) into a section of higher pressure (15), d a d u r c h e k e n n -z e i c h n e t that - the one forming the conveying channel Pipeline (3) at the point of separation from lower to higher pressure from at least one vertically laid pair of pipes (30) and that - in the lower area of the upward flow through the riser pipe (4) compressed air (31) is fed and that - The upper end of the riser pipe (4) with the upper beginning of the downpipe (16) through a guide 11 provided with water passages - which is provided with clearance - The shape of the capsules (2) is adapted, is arranged and that - the upper area of the riser (4) and downpipe (16) has a separating chamber (8) for segregation the compressed air (31) fed into the transport liquid (5) in the riser pipe (4) and that - a hydrostatic liquid column in the downward flow through the downpipe (16) is trained. 2. Apparatus according to claim 1, d a d u r c h g e k e n n -z e i c h n e t that several vertically laid pipe pairs (30) with feed of compressed air (31) in the riser pipes (4), which in the upper area both the guide (11) as well as the separating chamber (8) and a hydrostatic one in the downpipe (16) thereof Column is formed, are arranged in series one behind the other. 3. Device according to claims 1 to 2, by a d u r c h g e -k e n n n e i c h n e t that the fed in in the lower area of the riser pipe (4) Compressed air to the compressed air cushion (7) of the separator tank (8) by means of a suction line (20) removed and via the compressor (10), the pressure line (21) and the flow control valve (22) is fed to the riser pipe (4). 4. Device according to claims 1 to 3, d a d u r c h g e -k e n n z e i c h n e t that with a number of series-connected perpendicular pairs of pipes (30), which in the upper area both the Have guide (11) and the cutting chamber (8) and in their downpipe (16) a hydrostatic column is formed, the compressed air (31) in the lower area of the riser pipe (4) of the last pair of pipelines - viewed in the running direction (30) is fed and that this is removed from the cutting chamber (8) again is to put them in the lower area of the riser pipe (4) of the pair of pipes arranged in front of it (30) feed, in the riser (4) it also rises again to itself to collect in the connected sheath chamber (8), which they removed again and fed into the riser pipe (4) of the pipe pair (30) located in front of it and that this line circuit of the compressed air supply up to, - in the direction of travel seen -, first vertically laid pipe pair (30) is continued. 5. Device according to claims 1 to 4, d a d u r c h g e -k e It is not noted that the pressure of the compressed air cushion (7) during operation depending on the liquid level in the separation chamber (8) and during the Standstill as a function of the liquid level in the lower area of the riser pipe (4) is controlled.