DE2354238A1 - PUMP ARRANGEMENT WITH LIQUID PISTON FOR MUD - Google Patents

Description

Paikstrasse 13

7688

MITSUBISHI KINZOKU KOGYO KABUSHIKI KAISHAs, Tokyo, Japan

Pump arrangement with liquid piston for sludge

The invention relates to pump assemblies of the type with Liquid pistons for use with liquids containing foreign matter and / or contain abrasive particles such as muddy water or ore slurry. and the like, and relates to improvements in such pumping arrangements.

A working with liquid piston pump assembly, the one Includes plunger pump and a liquid container by that the plunger pump is connected to a valve housing which has a suction valve and a discharge valve is known. During operation, the interior of the valve housing and the lower part of the liquid container filled with a liquid, which contains foreign matter and / or debris, such as muddy water or ore slurry, hereinafter referred to as sludge for short, while the inside of the plunger pump and the upper part of the liquid container are covered by an operating liquid such as oil, is taken, which has a lower specific weight than that of the liquid to be pumped or the sludge and im

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essentially immiscible with, insoluble in and non-reactive with the mud is.

There is a pronounced boundary layer in the liquid container between the sludge in the lower part of the tank and the operating liquid in the upper part of the tank, as mentioned immiscible with the sludge is formed and this interface is moved up and down alternately, in accordance with the work the smoke piston pump, so that the interface works like a liquid piston or a membrane piston. The up and movement of the interface causes the opening and closing the suction valve and the exhaust valve in the valve housing, which is connected to a mud pipe, and consequently becomes the sludge is pumped through the arrangement at a relatively high pressure.

Although the above-described mud pumping arrangement is advantageous in this respect is, as the plunger pump can be operated with an operating fluid that is absolutely free from abrasion Particulate matter is and an ingress of sludge into the plunger pump is effectively prevented because of the presence of the liquid container, the plunger pump requires a substantial Forming part of the conventional arrangement, a considerable size and weight, if an increase the capacity of the pumping arrangement is desired, operating the same is not done uniformly and odorless enough. Furthermore, there must be a volumetric relationship between the dimensions of the Valve housing, the liquid container and the displacement of the plunger are complied with, and a mere increase in the Displacement of the plunger pump leads to a dangerous exceeding of the predetermined end positions of the interface in the Liquid container. It is also essential that the interface be within a suitable range in the liquid container is kept at the start-up stage of the pumping arrangement, and hence is an automatic operation or remote control

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the pumping arrangement has so far been extremely difficult.

In view of the above-mentioned difficulties in conventional pumping arrangement of the liquid piston type for sludge and the like, the invention is based on the object to improve such an arrangement so that automatic operation and remote control of the pumping arrangement are carried out without causing serious vibration or abnormal pressure increase. .

The invention achieves this with a significant reduction at the same time of the size and weight of the entire arrangement, so that transport and assembly of the same are greatly simplified. Also enables the invention the use of a rotary pump instead of a plunger pump, thereby increasing the delivery rate of the Pump arrangement can be changed without any disturbance, as well as the use of commercially available components, so that the manufacturing costs the pumping arrangement s, I lower significantly.

The invention relates to a liquid piston type pumping arrangement for sludge and pulpy substances, which is primarily characterized by a pump unit for running Pressure delivery of an operating medium or an operating fluid, the specific weight of which differs from that of the sludge to be pumped differs and which is substantially immiscible, insoluble in, and non-reactive with the sludge; at least two Valve housings each having a suction valve and a discharge valve in communication with a sludge delivery line; at least two liquid containers which are in communication with one and the other valve housing; Connection channels between the Tanks and the pump unit; a switching device for the connecting channels between the pump unit and the liquid containers, so that the operating fluid alternates between the tanks to feed; Detector or sensing devices in each of the liquid containers for detecting the crossing of a past

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correct level through an interface between the operating fluid and the sludge contained in the tanks one on top of the other; and a control device for actuating the switching device as a function of signals from the sensing devices, such that by monitoring the pulsating movement of the interfaces the operation of the pump arrangement is stabilized in the containers with the aid of the FUhlvorrichtungen.

The following is the invention based on exemplary embodiments explained in more detail, which are shown in the drawings. In these show schematically

1 shows a first embodiment of a pump arrangement according to the invention for sludge with liquid pistons;

2 shows, as a further example, a second embodiment of the pump arrangement for sludge with liquid pistons according to the invention, and

3 shows a modified equipment of the pump arrangement with liquid containers, which are an essential component of the present invention.

The embodiment shown in Fig. 1 with a liquid piston working sludge pump arrangement according to the invention comprises two valve housings 1 and 1a of the same design. That Valve housing 1 contains a suction valve 2 and a discharge valve 3, which are connected to a suction line 4 and a discharge line 5 in FIG Connections that branch off from a main sludge line. Likewise, the valve housing 1a includes a suction valve 2a and a discharge valve 3a connected to a suction line 4a and a discharge line, respectively 5a are connected, both of which also branch off from the main sludge line.

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The mud pump arrangement also has two liquid containers 8 and Sa, each having two openings, one at the bottom and the other on an upper side of the container, and the valve housings 1 and 1a are through lines 7 and 7a with the bottom openings of the liquid container 8 and 8, respectively , 8a connected. Thus, the interior of the valve housing 1 and 1a and the lower halves of the liquid container 8 and 8a filled with sludge which is supplied from the suction pipes 4 and 4 _g when the pump assembly operates.

The upper side openings of the liquid container 8 and 8a are through conduits 9 and _P 9a connected with an electromagnetic change-over valve 10 which in turn through an intake passage 12 and a discharge line 13 to © in pump unit 11, for example from the turbine type _t which is rotatable in a constant direction, connected.

The upper half of each of the liquid containers 8 and 8a and the inside of the electromagnetic valve 10 are provided with an operating medium Y, for example. Oil filled ₉ that does not mix with, does not dissolve in and does not react with the sludge to be pumped or the like and has a lower specific gravity than that of the sludge, while the lower half of each of the liquid containers 8 and 8a is filled with the sludge , which is fed through the valve housing 1 and 1a from the main sludge line, so that distinct interfaces 14 and I4a are formed between the sludge X and the operating medium Y in the containers 8 and 8a,

In the upper ends of the liquid containers 8 and 8a are Detectors or sensors 15 and 15a are provided to detect displacements of the interfaces 14 and 14a in the liquid containers 8 and 8a to be recorded. When one of the interfaces 14 and 14a is raised until it reaches the tip of the corresponding probe 15 or 15a touched, a control unit 16 is actuated and thereby the electromagnetic Switching valve 10 energized as described in detail below. 409 820/077 6

The mud pumping arrangement of this embodiment works as follows. If the electromagnetic switching valve 10 assumes the position indicated in FIG. 1, in which the suction line 12 with the line 9 and the discharge line 13 with the line 9a are connected, the operating fluid or the operating medium Y flows through from the upper part of the fluid container 8 the line 9, a channel of the switching valve 10, the suction line 12, the pump 11, the delivery line 13, another channel of the Switching valve 10 and the line section 9a to the top of the liquid container 8a, as in Fig. 1 by the drawn out Arrow lines is indicated. Thus, the interface 14 rises in the liquid container 8 and an additional amount of the sludge is sucked from the suction line 4 into the valve housing 1 and into the lower part of the liquid container 8. At the same time it sinks the interface 14a in the liquid container 8a, so 'leave a certain Amount of the sludge contained in the lower part of the container 8a is discharged through the valve housing 10 and the pipe 7a into the discharge line 5a and further into the delivery side of the main sludge line 6.

If the interface 14 in the container 8 is raised further, until it touches the tip of the sensor 15, the control unit 16 is actuated and thereby the electromagnetic switching valve 10 is brought into another position in which the of the Rotary pump of the unit 11 conveyed resources in the ' The direction of flow is deflected, which is indicated by the dashed arrow lines in FIG. 1, whereupon the interface 14 lowered in the liquid container 8 and raised the interface 14a in the liquid container 8a. The one in the lower part of the Container 8 contained sludge is thus pressed to the valve housing 1 and a part of the same is in the discharge line 5 and further promoted into the main sludge line 6.

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At the moment when the interface I4a up to the height increases in which it touches the tip of the sensor 15a, the control device 16 is actuated again and thereby the electromagnetic Switching valve 10 brought to its original position in which the operating medium in the direction of the drawn arrow lines 1, so that the sludge is pressed out of the valve housing 1 a into the main delivery line 6.

The procedure described above is repeated over and over again, until a desired amount of sludge is pumped up from the suction lines 4 and 4a in alternating operation and into the discharge lines 5 and 5a is promoted. . .

As can be seen from the above description, the pumping arrangement comprises the liquid piston type according to this embodiment at least a pair of valve housing-liquid container combinations and a changeover valve, and since the operating medium is alternately directed into the liquid container through the changeover valve under the control of the control unit, which is dependent on the detection of the end positions of the interfaces in the liquid containers is actuated, a pump unit can be of a size and weight that is significantly smaller than that of the conventional Plunger pumps are used in the pumping arrangement according to the invention, thereby realizing numerous advantageous features can be, as can be seen from the above description.

Another embodiment of the equipped with liquid piston Mud pumping arrangement according to the invention is shown in Fig. 2, in which the same parts as in the first embodiment are provided with the same reference numerals and symbols.

This arrangement differs from the first example in that that a piston-cylinder device 20 between the switching

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valve 10 and the liquid containers 8 and 8a is arranged. The piston-cylinder device 20 includes first and second Cylinders 23 and 23a containing pistons 24 and 24a, respectively, as well third and fourth cylinders 26 and 26a containing pistons 27 and 27a, respectively. The pistons 24 and 27 are unitary by a rod 29 connected to one another and the pistons 24a and 27a are also unitarily connected by another rod 29 connected with each other. One end of a first line 21, the other end to one of four openings of the switching valve 10 is connected, is with the top of the piston 24 in the first cylinder 23 and with the bottom of the piston 24a connected in the second cylinder 23a, and one end of a second line 22, the other end of which is connected to another opening of the switching valve 10 is connected, is with the bottom of the piston 24 in the first cylinder 23 and with the top of the piston 24a connected in the second cylinder 23a.

In the same way, one end of a line 25 is the other End is connected to the liquid container 8, with the top of the piston 27 in the third cylinder 26 and connected to the bottom of the piston 27a in the fourth cylinder 26a, and the one End of a line 25a, the other end of which is connected to the liquid container 8a, is with the bottom of the piston 27 in the third cylinder 26 and connected to the top of the piston 27a in the fourth cylinder 26a. ^

In this second embodiment of the invention is also a Storage container 30 is provided on the suction side of the rotary pump P in order to store the operating fluid or the operating medium Y. through the pump P, the switching valve 10, the lines 21 and and to promote the interior of the cylinders 23 and 23a, while a Operating fluid or an operating fluid Z of a different type that does not mix with, does not dissolve in and does not react with the sludge to be pumped X and a specific gravity smaller than that of the sludge, in the tops of the liquid containers

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8 and 8a, the interior of the lines 25 and 25a ü * ^{10 of} the third and fourth cylinders 26 and 26a is included.

The second embodiment of the invention operates as follows. When the switching valve 10 is in the position to the operating medium Y in the solid arrow lines Direction marked direction in the line 21, the pistons 24 and 24a in the first and second cylinders 23 and 23a moved downwards or upwards, as indicated by further drawn out Arrow lines in Fig. 2 is indicated. As a result, some of the operating fluid will be on the opposite sides of the pistons 24 and 24a through the line 22 and the switching valve 10 back to Storage container 30 pressed on the suction side of the pump unit 11.

The downward and upward movements of the pistons 24 and 24a cause the pistons 27 and 27a to move downward and upward, respectively, as indicated by solid arrow lines, and part of the intermediate operating means Z ₉ is in the spaces below and above the piston 27 and 27a is contained in the third and fourth cylinders 26 and 26a, respectively, is thereby pressed into the upper part of the second liquid container 8a through the line 25a. Thus, the boundary layer 14a is printed in the second liquid container 8a downwards, and a part of the sludge X contained in the valve housing 1a _s is fed into the main sludge line. 6

On the other hand, through the downward and upward movements of the pistons 27 and 27a, respectively, one is sucked in Part of the intermediate operating means Z from the upper part of the first container 8 through the line 25 into the rooms above or ■ below the pistons 27 and 27a. The interface 14 in the container 8 is thereby raised and the sludge in the suction line 4 sucked into the valve housing 1 and to the lower part of the container 8.

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When the interface 14 finally makes contact with the tip of the sensor 14 is brought, the control unit 16 and then the switching valve 10 is actuated, so that the first operating means Y opposite to that described above. Direction in the Direction is steered, which is indicated by the broken arrow lines.

Since the piston-cylinder device 20, the liquid containers 8 and 8a provided in the second embodiment of the invention, between the switching valve 10 and each way is completely turned off, that undesirable constituents _s such as abrasion-causing particles and the like which are contained in the sludge, mix with resource Y. The fact that the diameter of the first and second cylinders is designed differently from the diameter of the third and fourth cylinders can also change the pressure and the delivery rate of the sludge puiapan arrangement with liquid pistons. In addition, since the operating medium Y acts on the sludge by switching on the second operating medium Z of the nature specified above, air or steam can be used as the operating medium Y instead of a liquid substance, so that in this embodiment it is possible to use a pump unit P in the form an air turbine or a steam turbine.

Another embodiment of the present invention is illustrated in FIG. 3, in which two pairs of liquid containers 18, 18a and 28, 28a are provided in addition to the liquid containers 8 and 8a present in FIG. The containers of each of the groups 8, 18, 28 and 8a, 18a, 28a are connected to one another in series, i.e. connected in series, and three types of resources Y, Z ^ and Z ₂ are used therein,

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so that interfaces 14, I4a, 31 »31a, 32 and 32a are formed between the sludge and the operating medium Z * and between the operating medium Z ^ and Z ₂ as well as Z ₂ and Y. The operating medium Z ^ can be an oil and the operating medium Z _{For example, 2} can be ¥ aster. The sensors 15 and 15a for the interfaces are provided in the liquid containers 28 and 28a which form the last stage.

In this embodiment of the invention, the possibility that the sludge X mixes with the operating agent Y can be completely eliminated, and furthermore the possibility that the sludge X acts on the sensors 15 and 15a can be prevented. If water is chosen as the resource Z ₂ , as mentioned above, any trace of the sludge X that _{might have penetrated the resource Z 2} can easily be removed by replacing the resource Z ₂ , since water as the resource Z _{2 is} cheap is.

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Claims (1)

Claims Pump arrangement with liquid piston for sludge and the like. following a sludge delivery line, characterized by a pump unit (11) for ongoing pressure delivery an operating medium or an operating fluid (Y), whose specific gravity differs from that of the sludge to be pumped (X) and which essentially do not is miscible, insoluble in, and non-reactive with the sludge; at least two valve housings (1, 1a), each with a suction valve (2, 2a) and a discharge valve (3> 3a) in connection with the sludge delivery line (6); at least two liquid containers (8, 8a) which are connected to one or the other valve housing (1, 1a) stand; Connecting channels (9, 9a) between the liquid containers (8, 8a) and the pump unit (11); a switching device (10) for the connecting channels (9, 9a) between the pump unit (11) and the liquid containers (8, 8a), so that the operating fluid or the operating medium (Y) alternate between the containers to feed; Detectors or sensing devices (15, 15a) in each the liquid container (8, 8a) for detecting the exceeding of a predetermined level by a Interface (14, 14a) between the operating fluid or the operating medium and the sludge contained one above the other in the container; and a control device (16) for actuating the switching device (10) as a function of signals from the 409820/077 6 Sensing devices (15 ".15a) ■ _s such that by controlling the pulsating movements of the boundary surfaces (14, 14a) stabilized in the liquid containers (B ₉ 8a) with the help of the sensing devices (15 ₈ 15a) the operation of the pumping arrangement ο 'arrangement according to claim 1 " characterized, that the pump unit (11) has a rotary pump. 3. Arrangement according to claim T, characterized by ^ that the operating medium (Y) is an oil .. 4ο arrangement according to claim 1, 'through this . characterized in that a piston-cylinder device (20) is provided between the liquid containers (8, 8a) and the switching device (10) for the connecting channels, which separate the operating medium from the sludge _9, on the other hand, the hydraulic movement between the operating liquid and the Able to transfer mud " 5. Arrangement according to claim 4, thereby 'g @ k &.xinzeich'n @ t ,. that the piston-cylinder device (20) has a first and a third cylinder (23 ₉ 23a) with interconnected pistons (24 ₉ 24a) and a second and a fourth cylinder (26, 26a) with interconnected pistons (27 _S 27a ) includes, where , the first piston side in the first cylinder (23) and the second piston side in the second cylinder (23a) with a through the switching device (10) leading. Connection channel (21) _s 408820/0776 } "7 O <η- ',; α - 14 - the second piston side in the first cylinder (23) and the first piston side in the second cylinder (23a) through a different one. the switching device connecting duct (22), the first piston side in the third cylinder (26) ms.d the second piston side in the fourth cylinder (26a) with the one liquid container (8) and the second piston side in the third cylinder (26) and the first piston side in the fourth cylinder (26a) are connected to the other liquid container (8a) in such a way that the operating means (Y) both sides of the first and second cylinders (23 »23a), while the third and fourth cylinders (26, 26a) contain an additional resource (Z). the one in each of the liquid containers (8 8a) Interface (14, 14a) with the sludge (X) forms « 6. Arrangement according to claim 5, characterized in that in the pump unit (11) a gaseous operating medium, such as air or steam or water vapor is used. 7. Arrangement according to claim 1, characterized in that each of the two liquid containers (8, 8a) in series' with at least one further container (18, 18a or 28, 28a) between the associated valve housing (1, 1a) and the Switching device (10) is arranged and the further containers contain an additional operating medium Z1, Z2), that is effective between the sludge and the operating fluid of the pump and has corresponding interfaces (31 »31a or 32, 32a) forms therein. ReNeu / Pi. 409820/0776 '