JP2008259989A - Closed pig apparatus of inter-product tank pipeline - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To economically form a pig apparatus of a pipeline system for milk or the like using a pipeline part and efficiently wash a pig having a constricted part by the pipeline part. <P>SOLUTION: A cross pipeline 2 with a diameter larger than the diameter of a pig 1, which is a pipeline part, is connected to a pipeline system A through eccentric reducers 3 and 4, which are also pipeline parts, to form a launcher and an air motor 5 is installed in the crossing connection port to make a valve stem 21 back and forth movable by the air motor 5. The valve stem 21 is moved backward and the pig 1 is pneumatically sent in the product transportation direction to recover a product and the valve stem 21 is moved forward, a swinging washing space 22 holding the pig 1 in the launcher is formed to carry out swinging washing of the pig 1 by a washing solution. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a closed pig apparatus for a piping system between product tanks preferably used for a piping system for transferring a liquid, sol or gel product such as milk, yogurt, soft drink or the like or a semi-finished product thereof.

  As a closed pig device of this type, for example, a launcher, a pig cleaning room, a pressurized fluid line is installed on the outside of the piping system branched from the piping system between the product tanks, and a catcher is installed on the other side. While the piping system is closed by opening and closing the valve, a pig is fired from the launcher, and the product loss is reduced as much as possible by extruding and collecting the product remaining in the piping system in the product transfer direction by the progress of the pig. By moving the push rod for determining the pig position back to the pressurized fluid line side, the pig is fed into the pig washing chamber by the pressurized washing liquid from the washing liquid supply pipe in the vicinity of the product tank, and the pig washing is carried out by the pressurized washing water. In this case, the pig cleaning chamber has a large number of grid-shaped pig holders having an inner diameter larger than that of the piping system and the same diameter as the pig diameter. It is assumed that it is arranged in the direction of feeding the pig. The pig is washed by holding the pig fed by the pig holder and supplying the pressurized washing liquid to the pressurized fluid line side through the launcher. The cleaning liquid pressurized in the longitudinal direction of the pig is passed through.

Japanese Patent Laid-Open No. 9-192620

  In this case, prevention of product loss and subsequent CIP cleaning can be performed by a closed system and can be effectively used for piping systems such as the above liquid products and gel products.

  However, in this case, since the launcher, pig cleaning room, pressurized fluid line, etc. are installed outside the piping system between the product tanks, the structure tends to be complicated and expensive. In addition, the number of parts is considerably increased, which leaves the problem that the control system and its program are complicated and the maintenance is easily complicated. In addition, piping systems used for product transfer often bend in the middle of the longitudinal direction to change direction, so that the pig used for cleaning has a smooth shape along the bent portion of the piping system. In order to smoothly change the direction and pass smoothly through the bent portion, it is generally provided with a pair of spherical portions matched to the inner diameter of the piping system and a constricted portion therebetween. This is done by holding the pig with a pig holder and passing cleaning water pressurized in the longitudinal direction of the pig, so that the cleaning of the constricted part is not possible when the pressure of the cleaning liquid does not sufficiently act on the constricted part. There is a possibility of becoming sufficient.

  The present invention has been made in view of such circumstances, and the problem is that the product recovery of the piping system can be performed as effectively and appropriately as possible with a simple structure as much as possible, and the shape of the pig is not limited. It is another object of the present invention to provide a closed pig apparatus for a piping system between product tanks that can perform the cleaning as effectively and appropriately as possible.

  In accordance with the above-mentioned problems, the present invention arranges a launcher in the piping system between product tanks via a preceding connecting pipe that blocks the passage of the pig and a subsequent connecting pipe that guides the pig to the piping system. For example, by supplying pressurized cleaning water from the connecting pipe side, the piping system is subjected to pig cleaning, while the inner diameter of the launcher is made larger than the pig diameter and a movable pig stopper is disposed on the launcher. Thus, a large and long pig rocking cleaning space is formed in the launcher, and when the pig stopper is advanced, that is, in the state of holding the pig by forward movement, for example, by supplying pressurized cleaning liquid from the preceding connecting pipe side, The swinging cleaning space of the pig can be used as a cleaning chamber, and the swinging of the pig can be performed so that the pressure of the cleaning liquid can be applied to the constricted part by swinging the pig with pressurized cleaning liquid. Thus, while maintaining a closed system, product recovery by the pig and reliable cleaning by swinging of the pig are possible. That is, the invention according to claim 1 can be used between product tanks. A pig device having a closed system interposed in a piping system, the launcher having a diameter larger than the inner diameter of the piping system, the piping system connection side having the same diameter as the inner diameter of the piping system, and the launcher connection side being pigged The diameter of the pipe is reduced to prevent the passage of the pipe and the leading connecting pipe located in front of the product transfer direction between the pipe system and the launcher. It has a subsequent connecting pipe that has a guide and is interposed between the launcher and the piping system, and is arranged on the launcher at a distance longer than the pig length from the small diameter portion of the preceding connecting pipe. A movable pig stopper for preventing or allowing the passage of the pig by advancing and retreating operation toward the road and for forming a swinging and washing space for the pig between the small diameter end portion of the preceding connecting pipe at the time of advancement. This is a closed pig device for a piping system between product tanks.

  In addition to the above, the invention described in claim 2 uses commercially available piping parts such as a cheese pipe (may be referred to as tee) and a cross pipe (may be referred to simply as cross). By connecting and arranging the above launcher, leading and following connecting pipes, the cost of both the pipe cleaning of the piping system and the reliable cleaning by swinging of the pig is ensured effectively and appropriately. As described above, this is characterized by using the above-mentioned launcher, the cheese pipe or the cross pipe of the piping parts, and the concentric or eccentric reducers of the same piping parts for the preceding connecting pipe and the succeeding connecting pipe, respectively. The closed pig device of the piping system between product tanks according to claim 2.

  In addition to the above, when the cheese pipe or the cross pipe of the pipe component is used for the launcher, the invention described in claim 3 connects the preceding and succeeding connecting pipes in series to the launcher, and the remainder By placing the drive device at the connection port of the slab and moving the pig stopper by the drive device, the movable pig stopper can be arranged with respect to the launcher by using the existing connection port without requiring special processing. In order to make it as simple and reliable as possible, connect the preceding connecting pipe and the succeeding connecting pipe to the opposite connecting port of the launcher by the cheese pipe or the cross pipe, and connect these connecting pipes in series. On the other hand, a driving device is arranged at the remaining connection port, and the pig stopper is operated by the driving device toward the inside and outside of the launcher. DOO is obtained by a product tank between piping system Kurozudopigu device according to claim 2, characterized in.

  In addition to the above, the invention according to claim 4 is also arranged in the piping system on the product tank side in the product transfer direction by arranging the same member as the preceding connecting pipe in the product transfer direction. As shown in Fig. 3, this is applied to the product tank side piping system in the product transfer direction, with one piping system connection side having the same diameter as the inner diameter of the piping system and the other piping system connection side being reduced in diameter. The closed pig device for a piping system between product tanks according to claim 1, 2 or 3, further comprising a catcher for preventing passage.

  In addition to the above, the invention according to claim 5 uses a commercially available piping component, and connects the piping component to the piping system to form the catcher, thereby reducing the cost of the piping system catcher. The product tank according to claim 4, wherein the catcher is provided with a concentric or eccentric reducer of piping parts so as to effectively and appropriately secure the function as This is a closed pig device for a piping system.

  The present invention is a means for solving the above problems as the gist of the invention.

  Since the present invention is configured as described above, the invention according to claim 1 is directed to a piping system between product tanks via a preceding connecting pipe that prevents passage of a pig and a subsequent connecting pipe that guides the pig to the piping system. The launcher is arranged in the system, and the piping system is pig-washed by supplying pressurized washing water, for example, from the preceding connecting pipe side, while the launcher has an inner diameter larger than the pig diameter and By arranging a movable pig stopper on the launcher, a large and long pig rocking washing space is formed in the launcher. When the pig stopper is advanced, that is, in the state of holding the pig by forward movement, from the preceding connecting pipe side, for example, By supplying pressurized cleaning liquid, the pig rocking cleaning space is used as a cleaning chamber, and the pig is swung by the pressurized cleaning liquid so that the pressure of the cleaning liquid is sufficiently applied to the constricted portion. By making it possible to perform swing cleaning of pigs, it is possible to recover products by pigs and ensure cleaning by swinging the pigs while maintaining a closed system. Further, it is possible to provide a closed pig apparatus for a piping system between product tanks which can be appropriately performed and can be cleaned as effectively and appropriately as possible regardless of the shape of the pig.

  In addition to the above, the invention described in claim 2 uses commercially available pipe parts such as cheese pipes and cross pipes, and by connecting the pipe parts to the pipe system, the launcher, the preceding and subsequent connecting pipes, By doing so, the functions of both the pipe cleaning of the piping system and the swinging cleaning of the pig can be ensured effectively and appropriately at low cost.

  In addition to the above, when the cheese pipe or the cross pipe of the pipe component is used for the launcher, the invention described in claim 3 connects the preceding and succeeding connecting pipes in series to the launcher, and the remainder By placing the drive device at the connection port of the slab and moving the pig stopper by the drive device, the movable pig stopper can be arranged with respect to the launcher by using the existing connection port without requiring special processing. It can be made as simple and reliable as possible.

  In addition to the above, the invention according to claim 4 is also arranged in the piping system on the product tank side in the product transfer direction by arranging the same member as the preceding connecting pipe in the product transfer direction. Can be.

  In addition to the above, the invention according to claim 5 uses a commercially available piping component, and connects the piping component to the piping system to form the catcher, thereby reducing the cost of the piping system catcher. The function can be effectively and appropriately secured.

  In the following, the present invention will be described in more detail with reference to the example of the drawings. A piping system between product tanks arranged so as to be transferred is shown, and B denotes a pig device constituting a closed system interposed in the piping system A.

  The pig device B has a launcher 2 having a diameter larger than the inner diameter of the piping system A, the piping system connection side has the same diameter as the inner diameter of the piping system A, and the launcher 2 connection side is prevented from passing the pig 1. The leading connecting pipe 3 in the front of the product transfer direction provided between the piping system A and the launcher 2 with a reduced diameter, and the pig guide 41 that is steplessly reduced in size from the inner diameter of the launcher 2 to the inner diameter of the piping system A step by step. And is provided in the launcher 2 at a distance longer than the pig length from the small diameter portion of the preceding connection pipe 3. The movement of moving or moving the pig 1 between the small-diameter side end of the preceding connecting pipe 3 at the time of advancement is prevented or permitted by the forward and backward movement toward the pig passage. Equipped with a pig stopper 21 Also, in the product tank side piping system A in the product transfer direction, one piping system connection side is made the same diameter as the inner diameter of the piping system A and the other piping system connection side is reduced in diameter to prevent the passage of the pig 1. A catcher 6 is provided.

  In this example, the launcher 2 uses a cross piping of piping parts for the preceding connecting pipe 3 and the succeeding connecting pipe 4, and also uses an eccentric reducer of the piping parts. Similarly, an eccentric reducer for piping parts is used, and the piping parts in this example are each provided with a flange or a screw, and the flange is fastened with a bolt and nut or a screw is screwed. In this case, an eccentric plate reducer interposed between them is used as the connecting member 31 for the cross piping of the eccentric reducer of the preceding connecting pipe in this example. As the connecting member 61 for the piping system in the product transfer direction of the catcher 6, an eccentric plate reducer interposed between them is used. And Aru.

  At this time, the launcher 2, the preceding connecting pipe 3 and the succeeding connecting pipe 4 by the cross pipe are connected to the opposing connection ports of the launcher 2, and these connecting pipes are arranged in series, whereby the launcher 2, the preceding and succeeding pipes are arranged. The connecting pipes 3 and 4 are connected to the piping system A so as to be in series with the piping system A, and the catcher 6 is also connected to the piping system A in series. These arrangements are carried out as shown in the figure. In this example, the piping system A has a nominal diameter, for example, 2 s, the cross pipe of the launcher 2 is 2.5 s, the eccentric reducer of the preceding connecting pipe 3 is 2 s × 1.5 s, and the eccentric plate reducer is 2.5 s. The eccentric reducer of × 1.5 s and subsequent connecting pipe 4 is 2.5 s × 2 s, each of which is a commercially available standard product. The difference in diameter between the launcher 2 and the piping system A is absorbed in the piping system A system. The above series connection is made, and the eccentric reducer of the catcher 6 is 2 s × 1.5 s and the eccentric plate reducer is 2 s × 1.5 s, which is also a commercially available standard product. Similarly, the diameter of the catcher 6 and the piping system A is the same. The above series connection is made by absorbing the difference.

  In the launcher 2 by the cross pipe, a movable pig stopper 21 that forms the rocking cleaning space 22 of the pig 1 is arranged on the launcher 2. The launcher 2 is movably disposed at a distance longer than the pig length from a small diameter portion of the connecting pipe 3, and the passage of the launcher 2 in the inner and outer directions is prevented or allowed to pass through the pig 1, and the preceding connecting pipe 3 The swing cleaning space 22 is formed between the small-diameter end and the pig stopper 21 is driven by the remaining connection port to which the preceding and subsequent connecting pipes 3 and 4 are connected. The device 5 is arranged and operated by the drive device 5 toward the inside and outside of the launcher 2.

  In other words, the launcher 2 using the cross pipe has a connection port opened in a cross shape, and a pair of remaining remaining pairs left by connecting the preceding and subsequent connection tubes 3 and 4 to a pair of connection ports facing each other. Are connected in series so that the air motor protrudes on both sides of the launcher 2, for example, by fastening both flanges with bolts and nuts. It is arranged. At this time, the air motor is used for a sanitary valve, and the air motor is integrally provided with a valve stem whose tip is covered with, for example, a soft resin so as to protrude from the air motor to the inside of the launcher with a predetermined stroke. The valve stem is used as the movable pig stopper 21 that prevents or allows the passage of the pig 1. As a result, the length of the valve stem is changed by the operation of the air motor in two ways, and the tip of the valve stem faces in the launcher 2 so that it reaches the center of the intersection of the launcher ports. By advancing so as to protrude longer and narrowing the intersection of the connection ports, the pig 1 is prevented from passing between the pig stoppers 21 of the valve stem, and the pig 1 is placed inside the launcher 2. While the swing cleaning space 22 can be formed freely, the tip of the valve stem is retracted so as to be shortened toward both sides of the connection port side of the launcher 2, thereby opening the connection port crossing portion and Allow the valve stem to pass between the pig stoppers 21, escape from the launcher 2 to the piping system A, and transfer the product remaining in the piping system A as the pig proceeds. So as to extrude collected in the direction of the product tank, there as to reduce loss of the product as much as possible.

  The product recovery by the pig 1 of the piping system A by the pig device B of the present example formed as described above and the swing cleaning of the pig will be described. The product recovery of the piping system A is the driving device using the air motor. By moving the pig stopper 21 backward by the operation 5, it is allowed to pass the pig 1 through the connection port intersection of the launcher 2. For example, the air (not shown) connected in series or branched to the piping system A on the delivery tank side This is done by supplying the sterilized compressed air from the compressor and pumping the pig 1 arranged in the launcher 2 from the launcher 2 toward the catcher 6 in the piping system. At this time, the pig 1 is introduced from the launcher 2 into the piping system A along the pig guide 41 of the subsequent connecting pipe 4 and is pumped. In this example, the subsequent connecting pipe 4 is connected to the eccentric reducer. By arranging the horizontal part at the lower position, the pig 1 advances along the connecting pipe 4 along the horizontal part by the pressure of the compressed air and reaches the pig guide 41, so that the pig 1 smoothly guides the pig. The guide 41 is easily and reliably introduced into the piping system A by the guidance, and troubles in product recovery can be effectively prevented. At this time, it is more effective to leave the actual product liquid in the preceding connecting tube 3 and the pig rocking cleaning space 22 portion. The pig 1 that has been pumped and has recovered the product of the piping system A is controlled to reduce the pressure as much as possible as it approaches the catcher 6, stops at the narrow part of the catcher 6, and stops the residual product of the piping system A Is discharged from a discharge pipe (not shown) installed in series or branched to the end of the piping system A. On the other hand, when the pig 1 is returned from the catcher 6 side to the launcher 2 after product recovery, the pig 1 is fed back by supplying compressed air from an air compressor (not shown) connected to the piping system on the receiving tank side. As a result, the pig 1 is discharged to the connecting port crossing portion of the launcher 2 through the subsequent connecting pipe 4 and reaches the narrow portion of the preceding connecting pipe 3 and stops. At this time, since the launcher 2 is larger in diameter than the pig 1, the launcher 2 returns so as to be placed horizontally on the horizontal portion of the launcher 2.

  At this time, the swing cleaning of the pig 1 is performed by moving the pig stopper 21 by the operation of the air motor, that is, moving forward so that the intersection of the connection port of the launcher 2 is blocked from passing the pig 1, and By forming the dynamic cleaning space 22, the pig 1 is prevented from being sent to the subsequent connecting pipe 4, and the preceding connecting pipe is connected from a cleaning liquid supply device (not shown) connected in series or branched to the piping system on the delivery tank side. This is done by supplying a pressurized cleaning liquid to the launcher 2 via 3. Since the rocking cleaning space 22 formed in the launcher 2 is larger than the diameter of the pig 1 and longer than the length thereof, it is placed on the horizontal portion of the launcher 2 and returned by receiving the pressure of the pressurized cleaning liquid. The pig 1 that floats in the swing cleaning space 22 is swung non-directionally in the vertical and horizontal directions, the tilt direction, and the like to be cleaned. The pig 1 uses, for example, a generally used spherical part at both ends and a constricted part in the middle, and the constricted part directly receives the pressure of the pressurized cleaning liquid by the swinging. Therefore, the cleaning of the pig 1 can be performed effectively and appropriately including the constricted portion. Thereafter, the cleaning may be completed by discharging the pressurized cleaning liquid from a discharge port (not shown) installed in series or branched to the piping system.

  The pig device B of this example is a closed pig device B by using commercially available standard piping parts for the launcher 2, catcher 6, launcher 2 placement leading connection pipe 3 and subsequent connection pipe 4. While being able to be configured as low cost as possible and performing both product recovery and swing cleaning of the pig 1 in the above piping system A effectively and appropriately, The arrangement of the movable pig stopper 21 with respect to the launcher 2 by installing an air motor as a driving device 5 having a valve stem that forms the pig stopper 21 and forming the connecting port as a cleaning chamber for swinging cleaning of the pig. Can be performed as easily and reliably as possible without special processing, and is suitable for various food and beverage piping systems such as liquid, gel-like products and sol-like semi-finished products It can be a thing.

  Although the illustrated example is as described above, when using piping parts for the launcher, it is necessary to use cheese piping instead of the above-mentioned cross piping. Similarly, a movable pig stopper can be made by arranging a valve stem that can be moved forward and backward so that it can reach the middle or bottom of the intersection of the series connection ports in the launcher at the remaining connection port where the tubes are connected in series. When using piping parts for the leading and succeeding connecting pipes, use a concentric reducer instead of the eccentric reducer, and use a bar-shaped stopper that catches the pig, with the catcher standing upright in the piping system. Including installation in the system, product tank, pig equipment, piping system, launcher, preceding connecting pipe, following connecting pipe, pig stopper Specific shapes, structures, materials, relations, additions to these, etc., such as pigs, catchers, piping parts used as necessary, cheese pipes, cross pipes, reducers, drive units, etc., do not contradict the gist of the invention. As long as various forms are possible.

It is a cross-sectional view of the plane state which shows the relationship between a piping system and a pig apparatus. It is a longitudinal cross-sectional view of FIG.

Explanation of symbols

A Piping system B Pig device 1 Pig 2 Launcher 21 Pig stopper 22 Pig swing cleaning space 3 Precedence connection pipe 31 Connection member 4 Subsequent connection pipe 41 Pig guide guide 5 Drive device 6 Catcher 61 Connection member

Claims (5)

  A pig device having a closed system interposed in a piping system between product tanks, the launcher having a diameter larger than the inner diameter of the piping system, and the piping system connection side having the same diameter as the inner diameter of the piping system and the launcher The diameter of the connecting side is reduced so as to prevent the passage of the pig, and the preceding connecting pipe located in front of the product transfer direction interposed between the piping system and the launcher, and the diameter gradually decreases stepwise from the inner diameter of the launcher to the inner diameter of the piping system. The rear connection pipe is provided between the launcher and the piping system with a pig guide guided in the rear of the product transfer direction, and is arranged on the launcher at a distance longer than the pig length from the small diameter portion of the preceding connection pipe. , A movable pigstow that prevents or allows the passage of the pig by advancing and retreating toward the pig passage, and forms a swinging and washing space for the pig between the small diameter end portion of the preceding connecting pipe when advanced. Product tank between piping system Kurozudopigu apparatus, characterized by comprising a par.   3. The product according to claim 2, wherein the launcher is formed by using a cheese pipe or a cross pipe as a piping part, and a concentric or eccentric reducer of the same piping part is used for the preceding connecting pipe and the succeeding connecting pipe, respectively. Closed pig device for piping system between tanks.   The preceding connecting pipe and the subsequent connecting pipe are connected to the facing connection port of the launcher by the cheese pipe or the cross pipe, and these connecting pipes are arranged in series, while the driving device is arranged in the remaining connecting port, and the driving device The closed pig device for a piping system between product tanks according to claim 2, wherein the pig stopper is operated toward the inside and outside of the launcher.   The product tank side piping system in the product transfer direction is equipped with a catcher that prevents the passage of pigs by making one piping system connection side the same diameter as the inner diameter of the piping system and reducing the other piping system connection side diameter. The closed pig apparatus of the piping system between product tanks of Claim 1, 2, or 3 characterized by the above-mentioned.   5. The closed pig device for a piping system between product tanks according to claim 4, wherein the catcher is a concentric or eccentric reducer of piping parts.

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