Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
  • F17D—PIPE-LINE SYSTEMS; PIPE-LINES
  • F17D3/00—Arrangements for supervising or controlling working operations
  • F17D3/03—Arrangements for supervising or controlling working operations for controlling, signalling, or supervising the conveyance of several different products following one another in the same conduit, e.g. for switching from one receiving tank to another
  • F17D3/08—Arrangements for supervising or controlling working operations for controlling, signalling, or supervising the conveyance of several different products following one another in the same conduit, e.g. for switching from one receiving tank to another the different products being separated by "go-devils", e.g. spheres
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
  • F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
  • F16L55/10—Means for stopping flow in pipes or hoses
  • F16L55/12—Means for stopping flow in pipes or hoses by introducing into the pipe a member expandable in situ
  • F16L55/128—Means for stopping flow in pipes or hoses by introducing into the pipe a member expandable in situ introduced axially into the pipe or hose
  • F16L55/1283—Plugging pig

Definitions

• Liquid and another flowable medium through the same delivery line.
• the invention relates to a method for conveying a liquid and another flowable medium through the same delivery line, in which the liquid and the other medium are successively fed to the front end of the delivery line and a separating body between the liquid and the other medium is introduced, which fills the line cross section, whereupon the separating body is conveyed through the delivery line together with the liquid and the other medium, the separating body separating the liquid and the other medium from one another largely without mixing.
• separating bodies between the individual liquids or media DE 25 29 346 B
• So-called separating pigs in the form of rubber balls are used as separating bodies, the diameter of which corresponds to the inside diameter of the feed line.
• the known system is intended for filling and extinguishing tankers with mineral oil products or chemicals.
• the introduction and removal of the separation pigs is avoided by the fact that a predetermined number of separation pigs are integrated in the system, which after fulfilling their function of separating milk from rinsing liquid and this from cleaning liquid, at the end of the delivery line in a central collecting device be caught within a pipeline extension in order to be transported back through a compressed air through the conveying line after the end of a conveying and cleaning cycle to an introduction station at the beginning or front end of the conveying line.
• a predetermined number of separation pigs are integrated in the system, which after fulfilling their function of separating milk from rinsing liquid and this from cleaning liquid, at the end of the delivery line in a central collecting device be caught within a pipeline extension in order to be transported back through a compressed air through the conveying line after the end of a conveying and cleaning cycle to an introduction station at the beginning or front end of the conveying line.
• the object of the invention is to prevent the mixing of successively conveyed products or media in a simple yet effective manner without the risk of bacterial contamination.
• an ice plug is used as the separating body according to the invention, which is formed by cooling the liquid in a front line section of the delivery line.
• the invention also relates to a device for carrying out this method with a delivery line, the front end of which is assigned at least one lockable connection for the supply of a liquid and at least one other flowable medium and the one front line outlet cut with an arrangement for introducing a separating body into the delivery line.
• the arrangement for introducing the separating body is an icing arrangement which has an inlet for a flowable refrigerant for icing liquid in the front line section.
• the separation pig principle is also used, but the knowledge is used that it is not necessary to insert a separate separation pig in the sense of a foreign body between the successively transported liquids or media, but that it is possible from to create a separating body for the liquid to be transported, in that a corresponding volume of liquid is solidified by icing or crystallization. There is no risk of contamination. Likewise, there is no need to segregate the ice plug at the 'end of the delivery line and the beginning of the line technically ⁇ technischzube Mon. Rather, the ice plug can simply be converted back into the original liquid by melting.
• a passage obstacle such as a valve built into the delivery line with a cross-sectional constriction or a pipe bend can be overcome in a correspondingly simple manner by thawing the egg plug immediately in front of the obstacle and forming a new ice plug immediately behind the obstacle. There is no fear of substantial mixing, especially since the new ice plug can be formed before the old one has melted.
• Gases and liquids which are able to crystallize or freeze the liquid to be transported through the conveying line within a short time can be used as the coolant for icing the liquid into a graft.
• the coolant for example, carbon dioxide (C0 2 ), nitrogen (N 2 ) or oxygen (0 2 ) come into consideration as gases, which can optionally also be supplied in liquefied form.
• Liquids with a significantly lower freezing temperature than the liquid to be iced come into consideration as liquid coolants.
• Refrigerants such as ammonia (NH 3 ) or Frigen can also be used, which are used in refrigeration systems.
• the required ice plug can be produced in a simple and particularly fast or shock-like manner by injecting a refrigerant gas into the relevant line section of the delivery line. Using an exact dosage of the the size (length) of the ice plug can be determined depending on the properties of the liquid to be pumped. Since the aforementioned refrigerant gases are sterile and tastelessly indifferent gases, which also escape again from the liquid being pumped, the direct introduction of the gases is also harmless in the food sector.
• the method according to the invention can be used not only to separate different liquids from one another during their delivery, but also to separate between a gas and a liquid within the delivery line.
• the ice plug can only be formed from the one liquid medium. Accordingly, it is important that at least every second medium conveyed is a freezable liquid. It is of course possible to introduce a small volume of freezable liquid between two normally consecutive non-freezable media so that mixing of the media can also be prevented in this case according to the invention.
• FIG. 2 shows an enlarged longitudinal section through the icing station with indirect cooling provided in FIG. 1;
• FIG. 3 shows an icing station with direct injection cooling that can be used as an alternative to FIG. 2;
• FIG. 4 shows the thawing station provided in FIG. 1 in an enlarged longitudinal section.
• Figure 1 shows three containers 1, 2, 3, which contain different products P1, P2, P3.
• the containers 1, 2, 3 are connected to a common product line 10, which is assigned to the three containers, via connections 4 or 5 or 6, which each have a lockable container valve 7 or 8 or 9 Has product valves 11 or 12 or 13 and leads to a pump 14.
• a common cleaning line 15 is provided with three cleaning valves 16, 17, 18, each of which a branch line 19, 20, 21 leads to one of the product valves 11, 12, 13.
• the cleaning valves 16, 17, 18 and the product valves 11, 12, 13 and the container valves 7, 8, 9 can be actuated or set so that a cleaning liquid or rinsing water from the cleaning line 15 - if necessary in sections - the product line 10 and - individually or simultaneously - the containers 1, 2, 3 can be supplied.
• the containers 1, 2, 3 can be individually connected to the product line 10.
• a common delivery line 22 connects to the pump 14 and has a front line section 23, a middle line section 24 and a rear line section 25.
• the front line section 23 is provided with an icing arrangement 26, while the rear line section 25 is assigned a thawing arrangement 27.
• the central line section 24 has an obstacle 28 through which liquid can flow, but does not allow a rigid body filling the line cross-section to pass.
• the passage obstacle is formed by a pipe bend 29, but it could also be a valve or other member with a cross-sectional constriction.
• a further thawing arrangement 30 and immediately behind the obstacle 28 another icing arrangement 31 is arranged.
• the icing arrangement 26 has a sheathing 32 surrounding the front line section 23 of the delivery line 22 with an inlet 33 and an outlet 34.
• An icing chamber 35 is thus formed between the line section 23 and the sheath 32, through which a coolant 36 can flow as shown by vertical arrows.
• a coolant 36 can flow as shown by vertical arrows.
• freezable liquid located in the line section 23 can be cooled to such an extent that in the area of the icing arrangement 26 Ice plug 37 is formed, which is indicated in Figure 2.
• This ice plug 37 forms a pig-like separating body between the flowable media on its opposite end faces. As the horizontal arrows in FIG. 2 indicate, the ice plug can be conveyed through the delivery line 22 together with the media separated by it.
• FIG. 3 shows an icing arrangement 38 which can be used instead of the icing arrangement 26 and which has a tapping attachment 39 with a valve chamber 40 and an inlet 41 for the coolant 42.
• a valve stem 44 sealed by means of a membrane 43 can be adjusted between the open position and the illustrated closed position via a control device (not shown), in which the mushroom-shaped valve body 45 closes the line bore 46 made in the line section 23.
• a control device not shown
• the injected coolant is preferably a frozen and possibly also liquefied gas.
• the injected amount of coolant causes the freezable liquid to freeze immediately, forming an ice plug 49, as is indicated in FIG. 3.
• the thawing arrangement 27 shown in FIG. 4 corresponds apparatively to the icing arrangement 26 in FIG. 2 and accordingly has a sheathing 50 surrounding the rear line section 25, which forms a thawing chamber 51, to which a heat transfer medium 52 is supplied instead of a coolant. Accordingly, the thawing arrangement 27 creates the possibility of melting the ice plug 37 formed in the icing arrangement at the beginning of the conveying line 22 in a short time.
• the thawing arrangement 27 can be dispensed with if, when the conveying operation is interrupted or the pump 14 is at a standstill, the melting of the ice plug 37 is waited solely by the supply of heat from the surroundings. Possibly. can also the ice plug 37 can simply be eliminated after it has fulfilled its separating function.
• the thawing arrangement 30 and the icing arrangement 31 in the central line section 24 of the conveying line 22, which are only provided in the presence of an obstacle 28, are designed like the thawing arrangement 27 or the icing arrangement 26 or 38, so that further details are unnecessary.
• the products P1, P2 and P3 are three different types of yoghurt which are to be processed with a common filling device which is connected to the conveyor line 22 connects and is not shown in Figure 1.
• the filling must be as pure as possible or with the least possible mixing between the products P1, P2 and P3.
• the product P3 is first filled or the container 3 is emptied, in that the liquid product is pushed out by the delivery line 22 by means of the pump 14.
• the product line 10 is also emptied while the delivery line 22 is still filled with the product P3.
• the front line section 23 contains the last product quantity P3 conveyed by the pump 14.
• the container 2 is then connected to the product line 10, whereupon the product P2 is conveyed through the delivery line 22 by means of the pump 14.
• the product P2 pushes the ice plug 37 or 49 in front of it through the delivery line, as a result of which the remaining product P1 still located in the delivery line 22 is also pushed out into the filling device.
• an ice plug 37 or 49 is formed from the product P2 in a corresponding manner by means of the icing arrangement 26 or 38, whereupon the container 1 is connected to the product line 10 and is emptied by means of the pump 14.
• the ice plugs 37 and 49 when they arrive at the end of the conveying line 22, can simply be removed and removed without the conveying through the conveying line 22 having to be interrupted.
• the delivery can be interrupted by stopping the pump 14 and the thawing arrangement 27 can be operated in order to transfer the ice plug 37 or 49 back into the liquid product.

Landscapes

• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Confectionery (AREA)
• Devices That Are Associated With Refrigeration Equipment (AREA)
• Pipe Accessories (AREA)
• Pipeline Systems (AREA)

Applications Claiming Priority (3)

Publications (1)

Family

ID=6440998

Family Applications (1)

Country Status (11)

Families Citing this family (10)

Family Cites Families (4)

• 1991
  • 1991-09-19 DE DE4131208A patent/DE4131208A1/de not_active Ceased
• 1992
  • 1992-09-17 BR BR9206521A patent/BR9206521A/pt not_active Application Discontinuation
  • 1992-09-17 AU AU25842/92A patent/AU2584292A/en not_active Abandoned
  • 1992-09-17 FI FI941283A patent/FI941283A7/fi not_active Application Discontinuation
  • 1992-09-17 WO PCT/EP1992/002145 patent/WO1993006409A1/de not_active Ceased
  • 1992-09-17 JP JP5505778A patent/JPH06510840A/ja active Pending
  • 1992-09-17 CA CA002118788A patent/CA2118788A1/en not_active Abandoned
  • 1992-09-17 EP EP92920045A patent/EP0604530A1/de not_active Withdrawn
  • 1992-09-17 HU HU9400778A patent/HUT68946A/hu unknown
  • 1992-09-17 CZ CS94627A patent/CZ62794A3/cs unknown
• 1994
  • 1994-03-18 NO NO940983A patent/NO940983L/no unknown

Non-Patent Citations (1)

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