JP2008162754A - Constant volume feeder for article to be transported and method of calculating feed amount of article to be transported - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a constant volume feeder for articles to be transported having a housing with a hopper simplified in structure, reduced in size and weight, and contributing to the saving of cost. <P>SOLUTION: A large-diameter through hole is formed at each of both end walls of a drum Hd of the housing. Recessed grooves forming conveying chambers arranged in the circumferential direction between themselves and the inner peripheral surface of the drum Hd are formed at the outer peripheral surface of a rotor body Rm. A pair of disk-like end walls closing axial both ends of the recessed grooves are formed integrally with the rotor body Rm. Both ends of a rotor shaft Rj extend from the disk-like end walls to the outside through the large-diameter through holes and pivotally supported on an installation wall B independently of the housing H. One end thereof is connected to a rotatingly driving means M outside the housing H. The gaps between the outer peripheral parts of the disk-like end walls and the opening edges of the large-diameter through holes are sealed by first seal devices allowing the relative rotation and misalignment thereof. The gap between the portion of the outer peripheral part of the rotor body Rm held by the adjacent conveying chambers and the inner peripheral surface of the drum Hd is sealed by a second seal device allowing the relative rotation and misalignment thereof. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a quantitative supply device for a slurry-like or countless granular object to be transferred, and a method for calculating the supply amount of the object to be transferred in a transfer system using this apparatus.

  In the present invention, the slurry-like transferred object includes dredged sand and other earth and sand containing a large amount of water, various mud soils, and the innumerable granular transferred object is an infinite number of hardly containing water. It includes a granular group or an infinite number of granular groups that have fluidity.

Conventionally, it is known that slurry-like objects to be transported, for example, dredged sand, are fed into a transfer pipe by using a quantitative supply device, when the wind pressure is fed to a remote place through a transfer pipe by wind force. . As a quantitative supply device used in this case, for example, as shown in Patent Document 1 below, an axial line has a substantially horizontal cylindrical drum portion and is fixed to an installation surface, and an upper portion of a peripheral wall of the drum portion. And a rotor that is housed in the drum portion and rotates about the axis of the drum portion, and an outer peripheral surface of the rotor body of the rotor includes an inner peripheral surface of the drum portion. A plurality of concave grooves defining a plurality of transfer chambers arranged in the circumferential direction are provided between the hopper, a hopper communicating with the inlet is integrally connected to the upper portion of the housing, and a lower portion of the housing is The upstream end of the transfer pipe communicating with the outlet is connected, and the flowable slurry-like or innumerable granular materials to be transferred that have been charged and accumulated in the hopper are entered into a plurality of transfer chambers that rotate according to the rotation of the rotor. Fall sequentially through While accommodated, which sequentially supplied to the transfer pipe to be transferred thereof transfer chamber and through the outlet have already been proposed.
Japanese Patent Publication No. 7-76454

  However, in the above-described conventional device, both end walls of the drum portion of the housing are formed large so as to cover the entire surface of both end surfaces of the rotor body, and both end portions of the rotor shaft are rotatably fitted to both end walls of the drum portion. In this case, bearing parts to be supported are provided, and driving means for rotating the rotor shaft is also installed integrally with the drum part. As a whole, the drum part and thus the housing becomes larger and the structure becomes complicated and the cost increases. There is. Further, when the rotor rotates, the mutual sliding area between the rotor main body and the drum portion exists in a relatively wide range at both ends of the rotor, so that the seal area becomes large and the seal structure becomes large and acts on the rotor. There were problems such as an increase in sliding resistance.

  In addition, after the assembly of the device is completed, if there is a misalignment between the rotor shaft and the drum portion inner peripheral surface of the housing due to manufacturing errors or assembly errors of each part of the device, the rotor shaft and drum portion inner peripheral surface Since it is easy for the transferred object to leak from between the two, it is necessary to increase the manufacturing accuracy and assembly accuracy of each part of the device in order to prevent such misalignment, which increases the cost. .

  The present invention has been made in view of such a situation, and a fixed-quantity supply device for a material to be transported that can solve the above-described conventional problems at once with a simple structure, and a material to be transported in a transport system using the device. It is an object of the present invention to provide a supply amount calculation method capable of calculating the supply flow rate of the above as accurately as possible.

  In order to achieve the above object, the invention of claim 1 has a cylindrical drum portion whose axis is substantially horizontal and is fixed to the installation surface, and has an inlet at the upper peripheral wall of the drum portion and an outlet at the lower peripheral wall. Respectively, and a rotor that is housed in the drum portion and rotates about the axis of the drum portion, and the rotor body outer peripheral surface of the rotor is circumferentially spaced between the inner peripheral surface of the drum portion. A plurality of concave grooves defining a plurality of transfer chambers arranged are provided, and a hopper communicating with the inlet is integrally connected to the upper portion of the housing, and the outlet is connected to the lower portion of the housing. An upstream end of a communicating transfer pipe is connected, and a slurry-like or innumerable granular material to be transferred, which is charged and accumulated in the hopper, is transferred to the plurality of transfer chambers which rotate according to the rotation of the rotor. In order through the entrance A fixed quantity supply device for the object to be transferred, which is sequentially dropped and supplied into the transfer pipe through the outlet, on both end walls of the drum portion, A large-diameter through hole having an inner diameter substantially equal to the outer diameter of the rotor body is formed, and the rotor body has a pair of disk-like end walls that close both axial ends of the plurality of concave grooves, and the pair of disks. A rotor shaft with both ends projecting outwardly from the end wall through the large-diameter through hole is integrally provided, and both ends of the rotor shaft are rotatably supported on the installation surface independently of the housing. In addition, at least one end of the disk-shaped end wall is interlocked and connected outside the housing, and the space between the outer peripheral portion of the disc-shaped end wall and the corresponding opening edge of the large-diameter through hole, Relative rotation and centering of both Between the portion of the outer peripheral portion of the rotor body sandwiched between adjacent transfer chambers and the inner peripheral surface of the drum portion, and the relative rotation of both of them. Sealing is performed over the entire axial length of the rotor body by a second sealing device that allows misalignment.

  According to a second aspect of the present invention, in addition to the above-described configuration of the first aspect, the first sealing device is detachably fixed to either the drum portion or the disc-shaped end wall, and the other one of them. At least a ring-shaped lid plate covering the gap, and the lid plate and either the drum portion or the disk-shaped end wall, and at least slidably contact therebetween. And a set of annular sealing means.

  Furthermore, the invention of claim 3 adds to the above-described configuration of claim 2, and the second sealing device extends linearly over the entire axial length of the rotor body and is adjacent to the outer periphery of the rotor body. A plurality of seal members that are slidably and liquid-tightly fitted and supported by the portions sandwiched between the transfer chambers, and urging each of the seal members radially outward of the rotor. And an urging means that slidably presses the radially outer end portion against the inner peripheral surface of the drum portion.

  Furthermore, in addition to the above-described configuration of claim 3, the invention of claim 4 further includes an annular boss projecting from the outer peripheral portion of the outer surface of the disk-shaped end wall, and the radial support hole provided in the boss has A base portion of the seal member is supported so as to be slidable in the radial direction, and the biasing means is disposed between the base portion of the seal member and the outer surface of the disk-shaped end wall on the radially inner side of the support portion. It is provided to be removable from the outside.

  Furthermore, in the invention of claim 5, in addition to the structure of claim 3 or 4, each of the sealing members is fitted into a support groove formed in the portion so as to cross the axial direction, and the lid The plate is formed with a plurality of work windows that allow the plurality of sealing members to be inserted into and removed from the support groove, and a small lid that liquid-tightly closes each work window is detachably attached to the lid plate. It is characterized by.

  Furthermore, the invention of claim 6 provides the structure between the opposed surface of the inner peripheral surface of the large-diameter through hole of the drum portion and the outer peripheral surface of the disc-shaped end wall in addition to the configuration of claim 3, 4 or 5. Is provided with a third seal device that suppresses movement of the transferred object from the transfer chamber to the first seal device side through the opposing surfaces.

  Furthermore, the invention according to claim 7 is the configuration according to any one of claims 1 to 6, wherein the object to be transferred falls on the rotor body from the transfer chamber through the outlet into the transfer pipe. Further, a peeling accelerating means for accelerating the peeling of the transferred object from the inner surface of the transfer chamber is provided.

  Furthermore, the invention of claim 8 is a method for calculating a supply amount of an object to be transferred in a transfer system using the quantitative supply device according to any one of claims 1 to 7, wherein the rotational speed of the rotor and the quantitative supply Correlating the supply flow rate of the object to be transferred from the apparatus to the transfer pipe in advance, measuring the rotational speed of the rotor, and calculating the supply flow rate based on the measured value and the correlation It is characterized by.

  Furthermore, the invention of claim 9 is a method for calculating the supply amount of an object to be transferred in a transfer system using the quantitative supply device according to any one of claims 1 to 7, wherein the supply amount is calculated in the transfer pipe from the transfer chamber through the outlet. The amount of the object to be transported when falling is determined in advance, the number of times the object to be transported falls from the transfer chamber through the outlet into the transfer pipe, and the measured value and the amount of fall are The supply amount of the transferred object is calculated based on the above.

  As described above, according to the present invention, large-diameter through holes having an inner diameter substantially equal to the outer diameter of the rotor body are formed in both end walls of the cylindrical drum portion in the housing, and the rotor body is formed on the outer circumferential surface thereof. A pair of disc-shaped end walls that closes both axial ends of the plurality of groove portions for defining the transfer chamber, and both ends project outward from the pair of disc-shaped end walls through large-diameter through holes. Since both ends of the rotor shaft are rotatably supported on the installation surface independently of the housing, the bearing support function for the rotor is removed from the housing (drum portion) and installed. The support of the housing and the rotor can be made independent on the surface, thereby greatly simplifying the structure of the housing with a hopper (particularly the drum portion) which is the main body of the apparatus and reducing the size and weight. Kill. In addition, the relative rotation and misalignment between the inner peripheral part of the large-diameter through hole provided at both ends of the drum part and the outer peripheral part of the corresponding disk-shaped end wall of the rotor body are provided. Between the part of the outer peripheral part of the rotor body sandwiched between adjacent transfer chambers and the inner peripheral surface of the drum part, and the relative rotation and misalignment between them. Is sealed over the entire length in the axial direction of the rotor main body by the second sealing device that allows for a sufficient amount of misalignment between the drum portion and the rotor. Sealing can be performed accurately, and a stable quantitative supply of the transferred object can be performed over a long period of time. Moreover, the sealing area can be made relatively narrow, so that the sealing structure can be simplified as much as possible, and the sliding of the sealing portion acting on the rotor can be achieved. Dynamic resistance can be reduced as much as possible . In addition, since the drum structure and the rotor allow a slight misalignment between the rotor and the conventional device, it is necessary to increase the manufacturing accuracy and assembly accuracy of each part of the device to prevent misalignment. This can greatly contribute to cost savings.

  In particular, according to the invention of claim 2, the first sealing device is detachably fixed to either the drum portion or the disk-shaped end wall and covers the other with a gap. And at least one set of annular sealing means provided between the lid plate and either the drum portion or the disk-shaped end wall and slidingly slidable therebetween. Even if a slight misalignment occurs between the drum and the rotor, the disc-shaped end wall of the rotor body and the end wall of the drum can be accurately sealed with a simple structure, and the cover plate can be removed. Thus, maintenance work such as inspection and maintenance for the first seal device can be easily performed.

  Further, in particular, according to the invention of claim 3, the second sealing device extends linearly over the entire axial length of the rotor body and has a diameter at a portion of the outer periphery of the rotor body sandwiched between adjacent transfer chambers. A seal member that is slidable in the direction and is liquid-tightly fitted and supported, and this seal member is urged radially outward of the rotor so that the radially outer end of the seal member is brought to the inner peripheral surface of the drum portion. With urging means that slidably press-contacts, even if there is a slight misalignment between the drum part and the rotor, the gap between the rotor outer peripheral part and the drum part inner peripheral surface is accurately sealed with a simple structure. In addition, even if the front end portion of the sealing material (ie, the contact surface with the drum portion) is somewhat worn by use, a sufficient sealing performance can be maintained over a long period of time.

  In particular, according to the invention of claim 4, an annular boss is projected on the outer peripheral portion of the outer surface of the disc-shaped end wall, and the base of the seal member is slid in the radial direction in the radial support hole provided in the boss. Since the urging means is detachably provided from the outside between the base portion of the seal member and the outer surface of the disc-shaped end wall on the radially inner side of the support portion, the second seal Maintenance work such as inspection and maintenance of the equipment can be easily performed.

  In particular, according to the invention of claim 5, each seal member is fitted in a support groove formed in the outer peripheral portion of the rotor body so as to cross the axial direction, and the lid plate has a plurality of seals. A plurality of work windows that allow the member to be inserted into and removed from the support groove are formed, and a small lid that covers each work window in a liquid-tight manner is detachably attached to the lid plate. The seal member can be easily inserted / removed from the support groove through the work window without removing each of them, and maintenance work such as inspection and maintenance on the seal member can be easily performed.

  In particular, according to the invention of claim 6, between the opposing surfaces of the inner peripheral surface of the large-diameter through-hole of the drum portion and the outer peripheral surface of the disc-shaped end wall, the transfer chamber passes through the space between the opposing surfaces. Since a third sealing device that suppresses the movement of the transferred object to the first sealing device side is provided, the third sealing device prevents leakage and movement of the transferred material from the transfer chamber to the first sealing device side. As a result, it is possible to effectively suppress the sealing load of the first sealing device, and the durability can be improved.

  In particular, according to the invention of claim 7, the rotor body is provided with a peeling promoting means for promoting peeling of the transferred object from the inner surface of the transfer chamber when the transferred object falls from the transfer chamber into the transfer pipe. Therefore, the objects to be transferred in the respective transfer chambers can be quickly and reliably separated from the surface of the transfer chamber, and accordingly, the objects to be transferred in each transfer chamber can be smoothly dropped and moved from the transfer chamber through the outlet into the transfer pipe. As a result, quantitative supply can be performed more reliably.

  In particular, according to the invention of claim 8, since the quantitative supply device of the present invention enables stable quantitative supply with relatively high accuracy, in the transfer system using the quantitative supply device, the rotational speed of the rotor In addition, a correlation with the supply flow rate of the object to be transferred from the quantitative supply device to the transfer pipe is obtained in advance, and the rotation speed of the rotor is measured, so that the supply based on the measured value and the correlation The flow rate can be calculated accurately over a long period of time.

  Further, according to the invention of claim 9 in particular, the quantitative supply device of the present invention equalizes the amount of fall of the object to be conveyed per transfer from the transfer chamber to the transfer pipe with relatively high accuracy. In the transfer system using the quantitative supply device, the fall amount is obtained in advance, and the number of times the transferred object falls into the transfer pipe from the transfer chamber is measured. By calculating the supply amount of the transferred object based on the fall amount, the supply amount can be accurately calculated over a long period of time.

  Embodiments of the present invention will be specifically described below based on the embodiments of the present invention illustrated in the accompanying drawings.

  In the accompanying drawings, FIGS. 1 to 9 show an embodiment of the present invention, FIG. 1 is an overall longitudinal sectional view showing an outline of a pneumatic transfer system for dredged sand, and FIG. 2 is a quantitative supply. FIG. 3 is a sectional view taken along line 3-3 in FIG. 2, FIG. 4 is a sectional view taken along line 4-4 in FIG. 2, and FIG. 4 is an enlarged cross-sectional view taken along line 5-5, FIG. 6 is an enlarged view taken along arrow 6 in FIG. 5, FIG. 7 is an enlarged view taken along arrow 7 in FIG. 5, and FIG. 9 is a cross-sectional view taken along line 9-9 of FIG. 10 is a diagram corresponding to FIG. 7 showing a modification of the third seal device, and FIG. 11 is a diagram corresponding to FIG. 8 showing a variation of the third seal device.

  First, in FIGS. 1 to 3, a pneumatic transfer system for continuously transferring a large amount of dredged sand as a slurry-like object to be stored stores dredged sand 1 generated in another dredging work place inside. A soil transport ship BB that can be transported on the water, a mud working ship BA that can be placed next to the soil transport ship BB, and a transfer pipe P that extends from the mud work ship BA to a landfill U as a soil disposal site. A large amount of dredged sand 1 is transferred from the mud working ship BA to the landfill U via the pipe P using air pressure. The transfer pipe P is supported in a floating state by a float f in the water portion.

  The dredging work ship BA is charged with a stationary type earth and sand take-out device SH that scrapes the dredged sand 1 stored in the earth transport vessel BB and the dredged sand 1 taken out from the earth carrying vessel BB by the earth and sand take-out device SH. A hopper HO, a fixed amount supply device SS connected to the lower portion of the hopper HO and capable of supplying the fixed amount of the clay 1 in the hopper HO into the transfer pipe P, and compressed air at the upstream end of the transfer pipe P A compressed air mixing device SA for mixing and supporting the transfer of earth and sand is mounted.

  The earth and sand take-out device SH is commonly referred to as a backhoe, and can be raised on a swivel base 3 standing on a hull of a mud working vessel BA so as to be able to turn 360 ° around a vertical axis, and on the front of the swivel base 3. And a bucket 5 connected to the tip of the refracting boom 4 so as to be swingable. By the cooperation of the swivel base 3, the refracting boom 4 and the bucket 5, the earth transport ship BB is provided. The dredged sand 1 can be intermittently thrown into the hopper HO of the mud working vessel BA.

  Next, a specific configuration of the quantitative supply device SS will be described with reference to FIGS. This fixed quantity supply device SS has a cylindrical drum portion Hd whose axis is substantially horizontal and is detachably fixed to the hull upper surface B of the mud working vessel BA as an installation surface, and the drum portion Hd. And a rotor R that is housed inside and rotates about the axis of the drum portion Hd.

  An upward inlet I is opened in the upper part of the peripheral wall of the drum portion Hd, and a downward outlet O is opened in the lower part of the peripheral wall. The inlet I is a hopper HO that stands integrally with the upper part of the housing H. The upstream end of the transfer pipe P is connected to the outlet O through a sediment discharge pipe 6 whose middle part is bent sideways.

  On the outer peripheral surface of the rotor main body Rm of the rotor R, a plurality of concave groove portions Rma that define a plurality of transfer chambers C arranged at equal intervals in the circumferential direction are provided between the inner peripheral surface of the drum portion Hd. That is, the rotor body Rm includes a substantially horizontal rotor shaft Rj penetrating through the drum portion Hd, a plurality of rotor blades Rw extending radially from the outer periphery of the intermediate portion of the rotor shaft Rj at equal intervals in the circumferential direction, and a plurality of rotor blades Rw. A pair of disk-shaped end walls Re that close both ends in the axial direction of the concave groove portion Rma are integrated with each other, and the concave groove portion Rma is formed between two rotor blades Rw adjacent to each other in the circumferential direction.

  Thus, when the rotor R is rotated, the plurality of transfer chambers C are rotated according to the rotation, and the transfer chambers C are periodically communicated with the inlet I and the outlet O. The flowable dredged sand 1 that has been thrown in and deposited is sequentially dropped and accommodated in the plurality of transfer chambers C through the inlet I according to the rotation of the rotor R, while the dredged sand 1 in the transfer chambers C is discharged from the outlet O. Then, it is dropped and supplied sequentially into the sediment discharge pipe 6 and further into the transfer pipe P.

  Circular large-diameter through holes Hdh having an inner diameter that is substantially the same as the outer diameter of the rotor body Rm (slightly smaller in the illustrated example) are formed in both end walls of the drum portion Hd. In the illustrated example, the inner diameter of the large-diameter through hole Hdh and the inner diameter of the inner peripheral surface of the drum portion Hd are the same.

  Both end portions of the rotor shaft Rj protrude outward from the center portions of the outer surfaces of the pair of disk-shaped end walls Re through the large-diameter through holes Hdh, and are supported independently from the housing H on the hull upper surface B as an installation surface. At the same time, one end thereof is interlocked and connected to the rotation driving means M outside the housing H. That is, on the upper surface B of the hull, a pair of support arms 10 and 11 are integrally erected on both sides of the housing H, and bearings (not shown) are provided at the upper ends of the support arms 10 and 11. Both end portions of the rotor shaft Rj are rotatably supported, and one end portion of the rotor shaft Rj is interlocked and connected so that the output shaft of the motor M as a rotation driving means rotates integrally. The motor casing is fixedly supported on the hull upper surface B.

  Between the outer peripheral portion of the disc-shaped end wall Re in the rotor body Rm and the opening edge portion of the large-diameter through hole Hdh in the corresponding end wall of the drum portion Hd, relative rotation and misalignment of both of them are allowed. Relative rotation between the part sealed between the transfer chambers C adjacent to the outer peripheral part of the rotor body Rm and the inner peripheral surface of the drum part Hd is sealed by the first sealing device S1. And the second sealing device S2 that allows misalignment seals the entire length of the rotor body Rm in the axial direction.

  The first seal device S1 is detachably fixed to either one of the drum portion Hd or the disk-shaped end wall Re (disk-shaped end wall Re in the illustrated example) with a bolt B1, and the other (illustrated example). Then, the ring-shaped lid plate T that covers the outer end surface around the large-diameter through hole Hdh of the drum portion Hd) with an axial gap, and the lid plate T and one of the other (in the illustrated example, the drum portion Hd). And at least one pair of annular sealing means 12 and 13 which are slidably contacted with each other so as to be slidable relative to each other. The inner peripheral portion of the inner surface of the lid plate T is in liquid-tight contact with the outer end surface of the disc-shaped end wall Re via an elastic seal ring.

  The first annular seal means 12 includes a first annular seal plate 12a which is detachably attached to the inner periphery of the cover plate T with a bolt B5 and is liquid-tightly joined over the entire circumference, and a bolt on the outer end surface of the drum portion Hd. It is composed of a pair of elastic seal rings 12b and 12c which are attached to a ring-shaped seal receiving plate 14 which is detachably attached with B4 and is liquid-tightly joined over the entire circumference and arranged concentrically with each other. The pair of elastic seal rings 12b and 12c are in pressure contact with the first annular seal plate 12a so as to be slidable relative to each other.

  The second annular seal means 13 includes a second annular seal plate 13a that is floatingly supported on the inner surface of the lid plate T across the entire circumference on the radially inner side of the first annular seal means 12, and this. And a second seal ring 13b fixed to the seal receiving plate 14 so as to face each other. The outer end surface of the second seal ring 13b is in pressure contact with the second annular seal plate 13a so as to be capable of relative sliding. Incidentally, the inner peripheral surface of the seal ring 13b is also respectively provided at a tip portion (radially outer end portion) of a seal member 15 to be described later and a divided elastic seal body 24 at the outer peripheral portion of the rotor body Rm (disk-shaped end wall Re). Press contact so that relative sliding is possible.

  Further, the second sealing device S2 extends linearly over the entire axial length of the rotor body Rm, and is supported so as to be slidable in the radial direction at a portion sandwiched between adjacent transfer chambers C on the outer periphery of the rotor body Rm. And the sealing member 15 is urged radially outward of the rotor R so that the radially outer end of the sealing member 15 is connected to the inner peripheral surface of the drum portion Hd and the large-diameter through hole in the end wall. And an urging spring 16 as urging means for slidably contacting the Hdh.

  Each seal member 15 is formed in a rectangular cross section and extends in a straight line in the rotor axial direction, and has a transverse cross section so as to hold the base (rotor radial inner end) of the elastic seal body 15s. It is comprised from the seal holder 15m which consists of a rigid body formed in U shape. A support groove 17 formed so as to cross the axial direction is formed in each portion of the outer periphery of the rotor body Rm sandwiched between adjacent transfer chambers C, and a seal is formed in the support groove 17. The base portion (particularly, the seal holder 15m) of the member 15 is fitted and supported so as to be slidable in the radial direction and liquid-tight.

  The cover plate T is provided with a plurality of work windows Ta formed in a shape and size that allow a plurality of seal members 15 to be inserted into and removed from the support groove 17, and each of the work windows Ta is liquid-tight. The small lid 20 to be closed is detachably attached to the lid plate T with a bolt B2. The inner surface of the small lid 20 is joined to a sealing body 22 made of a flat rubber material that presses against the axial end surface of the seal member 15 so as to be relatively slidable and seals between the end surface and the lid plate T. . The seal body 22 may be brought into contact with the inner surface of the small lid 20 so as to be separable without being fixed.

  Thus, when the small lid 20 is removed, the seal member 15 can be easily inserted and removed from the support groove 17 through the work window Ta without removing the lid plate T from the rotor body Rm one by one. The maintenance work can be easily performed.

  An annular boss portion Reb is integrally projected on the outer peripheral portion of the disc-shaped end wall Re in the rotor body Rm, and a support hole 18 extending in the radial direction is formed in the boss portion Reb. . A support rod 19 detachably fixed (screwed in the illustrated example) to the base portion (seal holder 15m) of the seal member 15 is fitted and supported in the support hole 18 so as to be slidable in the radial direction. The biasing spring 16 is provided between the support rod 19 and the support bracket 21 which is detachably fixed to the outer surface of the disc-shaped end wall Re by a bolt B3 on the inner side in the radial direction from the portion. Due to the elastic biasing force of the spring 16, the front portion (radially outer end portion) of the seal member 15 is pressed against the inner peripheral surface of the drum portion Hd and the inner peripheral surface of the large-diameter through hole Hdh of the end wall so as to be slidable relative to each other. Is done.

  Further, as shown in FIGS. 7 and 8, a pair of the support grooves adjacent to each other in the circumferential direction is formed on the outer peripheral portion of the disc-shaped end wall Re (the outer peripheral portion of the boss portion Reb) of the rotor body Rm. 17 is formed with six notch grooves 25 having both ends open, and the series of notch grooves 25 allows the inner peripheral surface of the large-diameter through hole Hdh in the drum portion end wall and the outer peripheral surface of the disk-shaped end wall Re to be formed. Between the opposing surfaces, an annular seal gap 50 is provided which is divided into a plurality of arc-shaped gaps by a plurality of seal members 15 (especially seal bodies 15s). And in each arc-shaped space | gap (namely, notch groove 25), it is the 3rd which suppresses that a to-be-transferred object (sediment sand) leaks and moves to the 1st sealing device S1 side from the transfer chamber C through between the said opposing surfaces. A sealing device S3 is provided. In the illustrated example, the third seal device S3 includes an arc-shaped split elastic seal body 24 fitted in a compressed state in each arc-shaped gap (ie, the cutout groove 25), both ends of the seal body 24, and the seal member 15. And a pair of small seal pieces 24 'filling the gap between the two. In the illustrated example, the outer peripheral surfaces of the elastic seal bodies 24 and the small seal pieces 24 'are the inner peripheral surface of the second seal ring 13b of the first annular seal means 13 in the first seal device S or the large-diameter through hole Hdh. It is press-contacted to the inner peripheral surface of the slidably relative to the inner peripheral surface. As a result, the distance between the opposing surfaces of the outer peripheral surface of the disc-shaped end wall Re in the rotor body Rm (that is, the portion other than the portion corresponding to the seal member 15) and the inner peripheral surface of the large-diameter through hole Hdh is third. Since sealing is performed by the sealing device S3, leakage and movement of dredged sand from the transfer chamber C to the first sealing device S1 through the opposed surfaces can be effectively suppressed, and the sealing burden of the first sealing device S1 is correspondingly increased. As a result, the durability is improved.

  Thus, the small lid 20 is removed from the lid plate T, the work window Ta is opened, the support bracket 21 and the urging spring 16 are removed from the drum portion Hd, and the support rod 19 is attached to the seal member 15 (seal holder 15m). In a more separated state, the seal member 15 can be easily inserted and removed from the support groove 17 through the work window Ta, and maintenance work such as inspection and maintenance on the seal member 15 can be easily performed.

  On the entire inner surface of the concave groove portion Rma facing the transfer chamber C and the disk-shaped end wall Re of the rotor body Rm, an object to be transferred (salt sand 1) falls into the transfer pipe P from the transfer chamber C through the outlet O. At this time, as a peeling accelerating means for accelerating the peeling of the transfer object 1 from the inner surface of the transfer chamber C, ceramic processing or other surface treatment processing for reducing the friction coefficient is performed. Moreover, the inner surface of the concave groove portion Rma is formed as a smooth concave curved surface as shown in FIG. 4 so that corner portions (edge-shaped concave surfaces) that are likely to accumulate earth and sand are not formed. This concave curved surface also constitutes the peeling promoting means. Although not shown, the boundary portion between the inner surface of the concave groove portion Rma and the disc-shaped end wall Re is also smoothly connected by a rounded surface (arc surface) as the separation promoting means. As a result, during the operation of the quantitative supply device SS, the object to be transferred (the dredged sand 1) in each transfer chamber C can be peeled off from the inner surface of the transfer chamber C without any difficulty. The object to be transferred can be smoothly dropped and moved from the transfer chamber C through the outlet O of the drum portion Hd into the sediment discharge pipe 6 (and hence the transfer pipe P), and the sediment discharge pipe 6 (and hence the transfer pipe P). A certain amount of dredged soil and sand can be supplied reliably.

  In the earth and sand discharge pipe 6, compressed air that can continuously mix into the earth and sand compressed air for pressure-feeding the earth and sand 1 supplied into the transfer pipe P by the quantitative supply device SS. The device SA is connected. This compressed air mixing device SA passes through a compressor 2 installed at an appropriate location near the transfer pipe P (on the pumping work ship BA in the illustrated example), and an air pipe 7 with an open / close valve 7v on the discharge side of the compressor 2. The nozzle pipe 8 communicates with the earth and sand discharge pipe 6 through the pipe wall in a liquid-tight manner and opens into the pipe, and the nozzle N is directed into the transfer pipe P. From there, the compressed air can be introduced into the transfer pipe P.

  Thus, the fixed quantity supply device SS and the compressed air mixing device SA constitute a sediment transport machine for supplying the dredged sand 1 and the compressed air to the upstream end of the transfer pipe P. In the pneumatic transfer system using such a sediment transporter, when the dredged soil is sufficiently charged into the hopper 2 and the motor M of the quantitative supply device SS and the compressor 2 of the compressed air mixing device SA are respectively operated, A fixed amount of dredged sand is supplied to the upstream end of the transfer pipe P from the quantitative supply device SS, and at the same time, compressed air is ejected vigorously from the nozzle pipe 8 and mixed into the dredged sand. Sediment 1 can be efficiently transferred in large quantities.

  Next, the operation of the embodiment will be described. The dredged soil 1 including water collected at a dredging work site (not shown) (that is, an object to be transported) is stored in the earth transport ship BB and transferred to the water near the landfill U that is the final disposal site. In the water area, a mud working ship BA is waiting, and a transfer pipe P is installed in advance from the working ship BA to the landfill U.

  Therefore, after laying the earth transport ship B on the mud work ship BA, the stored earth and sand 1 in the earth transport ship BB is scraped out by the earth and sand take-out device SH and put into the hopper HO. The operation of the motor M of the device SS and the compressor 2 of the compressed air mixing device SA is started. Thereby, the dredged sand 1 in the hopper HO is supplied to the transfer pipe P by the fixed quantity supply device SS through the sediment discharge pipe 6 in a fixed amount, and at the same time, the compressed air from the compressor 2 is transferred through the air pipe 7 and the sediment discharge pipe 6. It is mixed in the dredged sand 1 near the upstream end of the pipe P, whereby the dredged sand 1 can be efficiently transferred in large quantities to the landfill U through the transfer pipe P.

  In this case, in the quantitative supply device SS, large-diameter through holes Hdh having an inner diameter substantially equal to the outer diameter of the rotor main body Rm are formed in both end walls of the cylindrical drum portion Hd in the housing H, respectively. A pair of disk-shaped end walls Re that close both axial ends of the plurality of concave grooves Rma on the outer peripheral surface thereof are integrally provided, and both ends of the rotor shaft RJ have a larger diameter than the pair of disk-shaped end walls Re. It protrudes outward through the through hole Hdh, and is rotatably supported on the installation surface B independently of the housing H. Thus, the bearing support function for the rotor R is removed from the housing H (drum portion Hd), and the support of the housing and the rotor is made independent on the installation surface B, thereby providing a hopper HO that forms the main body of the quantitative supply device SS. The structure of the housing H can be greatly simplified and reduced in size and weight.

  In addition, the relative rotation between the inner peripheral portion of the large-diameter through hole Hdh provided at both ends of the drum portion Hd and the corresponding disk-shaped end wall Re outer peripheral portion of the rotor body Rm. And between the portion of the outer peripheral portion of the rotor main body Rm sandwiched between adjacent transfer chambers C and the inner peripheral surface of the drum portion Hd, with the first sealing device S1 that allows misalignment. However, since the sealing is performed over the entire axial length of the rotor body Rm with the second sealing device S2 that allows relative rotation and misalignment of the two, there is some misalignment between the drum portion Hd and the rotor R. In addition, a necessary sealing region between the rotor R and the drum portion Hd can be accurately sealed, and stable quantitative supply of dredged soil can be performed over a long period of time. Moreover, since the seal region can be made relatively narrow, the seal structure can be simplified as much as possible, and the sliding resistance from the seal portion acting on the rotor R can be reduced as much as possible. Since the drum structure Hd and the rotor R have a seal structure that allows a slight misalignment between the drum portion Hd and the rotor R, the manufacturing accuracy and assembly accuracy of each part of the device are specially increased to prevent misalignment as in the conventional device. This eliminates the need to do so and saves costs.

  Further, as shown in the figure, the first seal device S1 is detachably fixed to the disc-shaped end wall Re of the rotor R, and covers the periphery of the large-diameter through hole Hdh of the drum portion Hd with a gap therebetween. And the at least one pair of annular sealing means 12 and 13 which are provided between the cover plate T and the drum plate Hd and are slidably contacted with each other so as to be slidable therebetween. Even if a slight misalignment occurs between the rotor R and the rotor R, the disc-shaped end wall Re of the rotor R and the end wall of the drum portion Hd can be accurately sealed with a simple structure. By removing, maintenance work such as inspection and maintenance for the first seal device S1 can be easily performed.

  Further, as shown in the illustrated example, the second sealing device S2 extends in a radial direction at a portion extending linearly over the entire axial length of the rotor body Rm and sandwiched between adjacent transfer chambers C on the outer periphery of the rotor body Rm. A seal member 15 slidably and liquid-tightly fitted and supported, and the seal member 15 is urged outward in the radial direction of the rotor so that the radially outer end of the seal member 15 is the inner peripheral surface of the drum portion. The urging means for slidably press-contacting to the rotor is provided, so that even if a slight misalignment occurs between the drum part and the rotor, the structure between the outer peripheral part of the rotor R and the inner peripheral surface of the drum part Hd can be accurately determined with a simple structure. In addition, even if the tip of the sealing material 15 (that is, the contact surface with the drum portion Hd) is worn slightly by use, sufficient sealing performance can be maintained over a long period of time.

  10 and 11 show a modified example of the third sealing device S3. In this modification, a plurality of seal members 15 (especially seal bodies 15s) are provided between opposing surfaces of the inner peripheral surface of the large-diameter through hole Hdh in the drum portion end wall and the outer peripheral surface of the disc-shaped end wall Re. A relatively wide annular seal gap 50 is provided which is divided into a plurality of arcuate gaps 25 in the axial direction. The third sealing device S3 that suppresses leakage and movement of the transfer object (sediment sand) from the transfer chamber C to the first sealing device S1 side through the opposed surfaces is compressed in each arcuate gap 25. An arc-shaped split elastic seal body 24 to be fitted, a pair of small seal pieces 24 ′ that fills the gap between both ends of the seal body 24 and the seal member 15, and an uneven engagement with the back surface of the elastic seal body 24. And a back metal 52 that is detachably secured to the outer peripheral surface of the end wall of the rotor body Re by a bolt B7. In the illustrated example, the outer peripheral surfaces of the respective elastic seal bodies 24 and small seal pieces 24 ′ are formed on the inner peripheral surface of the second seal ring 13 b of the first annular seal means 13 and the large-diameter through hole Hdh in the first seal device S. Press contact with the inner peripheral surface so as to allow relative sliding. As a result, the distance between the opposing surfaces of the outer peripheral surface of the disc-shaped end wall Re in the rotor body Rm (that is, the portion other than the portion corresponding to the seal member 15) and the inner peripheral surface of the large-diameter through hole Hdh is third. Since sealing is performed by the sealing device S3, leakage and movement of dredged sand from the transfer chamber C to the first sealing device S1 through the opposed surfaces can be effectively suppressed, and the sealing burden of the first sealing device S1 is correspondingly increased. As a result, the durability is improved.

  By the way, in the dredged sand transfer system in which the hopper HO, the quantitative supply device SS, and the transfer pipe P are connected as in the present embodiment, the supply flow rate of the dredged sand 1 that is the object to be transferred from the quantitative supply device SS to the transfer pipe P. If the sediment flow rate in the transfer pipe P is known, the flow rate data can be used for various process management in the system. For example, the setup and work speed of the sediment loading operation in the hopper HO by the sediment take-out device SH, the compressed air, This is useful for adjusting the amount of compressed air supplied from the mixing device SA to the transfer pipe P efficiently and accurately.

  Therefore, in the conventional dredging work site, the sediment flow rate in the transfer pipe was measured with an electromagnetic flowmeter, but this flowmeter measures the flow velocity in the pipe from changes in the electrical and electromagnetic conductivity of the fluid in the pipe. Therefore, since it is a mechanism for calculating the sediment flow rate, accurate flow rate measurement was difficult. That is, dredged soil is mixed with foreign matters (such as metal pieces, wood pieces, viscosity, etc.) other than earth and sand, so that the measured values of electrical and electromagnetic conductivity are likely to vary, and even when the foreign matter is not mixed. Fluid such as dredged soil that contains water, stones, sand, silt, viscosity, etc., is not a uniform fluid in the transfer pipe, and the flow velocity in the pipe is not uniform. There is a problem that is likely to occur.

  On the other hand, in this embodiment, it is possible to stably supply a fixed amount of dredged sand from the fixed amount supply device SS to the transfer pipe P with relatively high accuracy, and the flow rate of dredged sand is determined by the rotational speed of the rotor R. The relationship between the rotational speed of the rotor R and the sediment supply flow rate from the quantitative supply device SS to the transfer pipe P is obtained in advance, and the rotational speed of the rotor R is measured. Then, the supply flow rate is calculated based on the measured value. This makes it possible to effectively increase the measurement accuracy of the sediment flow rate compared to the conventional example using the electromagnetic flow meter, and to increase the sediment flow rate for a long time. Thus, it is possible to calculate with high accuracy.

  As a specific method, for example, an output signal of a rotational speed sensor (not shown) for measuring the rotational speed of the rotor R or the motor M is taken into a computer such as a personal computer, and the rotational speed stored in advance in the computer. Using the correlation equation or table or map between the sediment supply flow rate from the metering supply device SS to the transfer pipe P, the sediment supply flow rate is calculated from the rotational speed measurement data, and the calculated value is displayed on the PC monitor. To do. The worker on the site sees this display and effectively uses the calculated value of the sediment supply flow rate for the various process management described above at the work site.

  Further, as another method of the present invention for calculating the amount of earth and sand supplied by the quantitative supply device SS, for example, the amount of dredged sand falling when falling into the transfer pipe P from the transfer chamber C through the outlet O is calculated or measured. Measure the number of times dredged sand falls from the transfer chamber C through the outlet O into the transfer pipe P, and supply dredged sand based on the measured value and the amount of fall previously obtained. The amount may be calculated. This is a stable quantitative supply of dredged sand from the quantitative supply device SS to the transfer pipe P with a relatively high accuracy (that is, the amount of dredged sand per drop from the transfer chamber C to the transfer pipe P is equalized. Supply of dredged sand based on the previously determined amount of dredged dredged sand and the actual number of drops of dredged sand from the transfer chamber C into the transfer pipe P. Thus, the amount of dredged sand supplied from the quantitative supply device SS to the transfer pipe P can be accurately calculated over a long period of time.

  As a specific method, for example, the number of times of dropping is provided in the drum portion Hd so that the detected portion provided at an appropriate position corresponding to each transfer chamber C on the outer peripheral portion of the rotor main body Rm can be detected. It can be detected by a sensor device (not shown) including a detection unit such as a proximity sensor. Further, instead of such a sensor device, the number of drops can also be detected by a sensor device (not shown) provided at the outlet O and capable of detecting passage (falling) of the sediment at the outlet O. Then, the output signal of the sensor device is taken into a computer such as a personal computer, and the sediment supply amount is calculated based on the fall amount data stored in the computer in advance and the integrated value of the number of drops, and the calculation Display the value on the computer monitor. The worker on the site sees this display and effectively uses the calculated value of the earth and sand supply amount for the various process management described above at the work site.

  As mentioned above, although the Example of this invention was explained in full detail, this invention can perform a various design change in the range which does not deviate from the summary.

  For example, in the above embodiment, most of the transfer pipe P is suspended on the surface of the water and laid down to the landfill U as a sediment disposal site. However, in the present invention, part or all of the transfer pipe P is placed on the ground. You may make it lay.

  Moreover, in the said Example, fixed_quantity | feed_rate supply apparatus SS is utilized for the wind power transfer of the slurry-like earth and sand (soil earth sand) by the transfer pipe P between the mud working ship A and the landfill U as a earth and sand disposal site. However, the starting point and the arrival point of the slurry-like earth and sand of the object to be transferred are not limited to the embodiment, and the fixed amount supply device of the present invention can also be applied to a transfer method not using wind power.

  In the above embodiment, the outlet O of the fixed amount supply device SS (housing H) is connected to the transfer pipe P via the earth and sand discharge pipe 6. However, in the present invention, the outlet O is directly connected to the transfer pipe P. You may make it connect.

  Moreover, in the said Example, although what compressed the compressed air from compressed air mixing apparatus SA was injected to the earth and sand discharge pipe 6 in front of the transfer pipe P upstream was shown, in this invention, the compressed air is transferred to the transfer pipe P. You may make it inject directly.

1 is an overall longitudinal sectional view showing an outline of a pneumatic transfer system for dredged sand according to one embodiment of the present invention. Front view showing the main part of the fixed-quantity supply device (part 2 arrow enlarged view of FIG. 1) 3-3 sectional view of FIG. Sectional view along line 4-4 in FIG. FIG. 4 is an enlarged sectional view taken along line 5-5. 6 part enlarged view of FIG. 7 part enlarged view of FIG. Sectional view taken along line 8-8 in FIG. Sectional view taken along line 9-9 in FIG. FIG. 7 is a view corresponding to FIG. 7 showing a modification of the third sealing device. FIG. 8 is a view corresponding to FIG. 8 showing a modification of the third sealing device.

Explanation of symbols

B ··· Hull upper surface as installation surface ··· Transfer chamber H ··· Housing HO · · · Hopper Hd · · · Drum portion Hdh · · · Large diameter through hole I · · · Inlet M · · · ... Motor O as rotational drive means ... Exit R ... Rotor Rm ... Rotor body Rma ... Dove groove Rj ... Rotor shaft Re ... Disk end wall Reb ... Annular boss SS ... Quantitative supply device S1 ... first sealing device S2 ... second sealing device S3 ... third sealing device T ... lid plate Ta ... work window 1 ... ..Sediment sand 12 and 13 as the object to be transferred First and second annular sealing means 15... Sealing member 16 .. Biasing spring 18 as urging means. Support groove 20 ... small lid 25 ... arc-shaped gap (notch groove)
50 ... annular seal gap

Claims (9)

It has a cylindrical drum portion (Hd) whose axis is substantially horizontal and is fixed to the installation surface (B), and has an inlet (I) at the upper peripheral wall of the drum portion (Hd) and an outlet (O) at the lower peripheral wall. ) Each having an opening (H),
A rotor (R) housed in the drum part (Hd) and rotating around the axis of the drum part (Hd);
A plurality of concave grooves (Rma) defining a plurality of transfer chambers (C) arranged in the circumferential direction between the outer peripheral surface of the rotor main body (Rm) of the rotor (R) and the inner peripheral surface of the drum portion (Hd). )
A hopper (HO) communicating with the inlet (I) is integrally connected to an upper portion of the housing (H), and communicated to the outlet (O) at a lower portion of the housing (H). The upstream end of the transfer pipe (P) is connected,
The flowable slurry-like or innumerable granular objects to be transferred (1) charged and accumulated in the hopper (HO) are transferred to the plurality of transfer chambers (C) that rotate according to the rotation of the rotor (R). While dropping and accommodating sequentially through the inlet (I), the transferred object (1) in the transfer chamber (C) is sequentially dropped and supplied into the transfer pipe (P) through the outlet (O). A device for quantitatively supplying a material to be transferred,
Large diameter through holes (Hdh) having an inner diameter substantially equal to the outer diameter of the rotor body (Rm) are formed in both end walls of the drum portion (Hd), respectively.
The rotor main body (Rm) has a pair of disk-shaped end walls (Re) that close both axial ends of the plurality of concave grooves (Rma), and a larger diameter than the pair of disk-shaped end walls (Re). A rotor shaft (Rj) whose both ends protrude outwardly through the through hole (Hdh) is integrally provided,
Both end portions of the rotor shaft (Rj) are rotatably supported on the installation surface (B) independently of the housing (H), and at least one end portion of the rotor shaft (Rj) is a rotation drive means (outside the housing (H). M)
A first sealing device that allows relative rotation and misalignment between the outer peripheral portion of the disk-shaped end wall (Re) and the opening edge portion of the corresponding large-diameter through hole (Hdh). Sealed over the entire circumference by (S1),
Between the outer peripheral portion of the rotor body (Rm) sandwiched between adjacent transfer chambers (C) and the inner peripheral surface of the drum portion (Hd), relative rotation and misalignment of both are allowed. An apparatus for quantitatively supplying an object to be transferred, wherein the second sealing device (S2) seals the entire length of the rotor body (Rm) in the axial direction.   The first sealing device (S1) is a ring-shaped member that is detachably fixed to either the drum portion (Hd) or the disc-shaped end wall (Re) and covers the other with a gap. The lid plate (T), and the lid plate (T) and either the drum portion (Hd) or the disk-shaped end wall (Re), are slidably slidable therebetween. The device for quantitatively supplying an object to be transferred according to claim 1, comprising at least one set of annular sealing means (12, 13) in contact with each other.   The second sealing device (S2) extends linearly over the entire axial length of the rotor body (Rm) and is sandwiched between adjacent transfer chambers (C) on the outer periphery of the rotor body (Rm). A plurality of seal members (15) that are slidable in a radial direction and supported in a liquid-tight manner on the portion, and the seal members (15) are urged outward in the radial direction of the rotor (R). The bearing (16) according to claim 2, further comprising urging means (16) for slidably pressing the radially outer end of the member (15) against the inner peripheral surface of the drum (Hd). A fixed-quantity supply device for transported materials.   An annular boss portion (Reb) projects from the outer peripheral portion of the outer surface of the disc-shaped end wall (Re), and the seal member (15) is inserted into a radial support hole (18) provided in the boss portion (Reb). A base portion is supported so as to be slidable in the radial direction, and is disposed between the base portion of the seal member (15) and the outer surface of the disk-shaped end wall (Re) on the radially inner side of the support portion. 4. The apparatus for quantitatively supplying an object to be transferred according to claim 3, wherein the biasing means (16) is detachably provided from the outside.   Each of the sealing members (15) is fitted into a support groove (17) formed in the portion so as to cross the axial direction in the portion, and the sealing plate (T) is provided with the plurality of sealing members (15). A plurality of work windows (Ta) that allow the insertion and removal of the support grooves (17) with respect to the support grooves (17) are formed, and small lids (20) that liquid-tightly close the work windows (Ta) are formed on the lid plate (T). The fixed-quantity supply apparatus of the to-be-transported object of Claim 3 or 4 characterized by the above-mentioned.   Between the opposing surfaces of the inner peripheral surface of the large-diameter through hole (Hdh) of the drum portion (Hd) and the outer peripheral surface of the disc-shaped end wall (Re), the transfer chamber (C 6) A third sealing device (S3) is provided for suppressing movement of the transferred object from the first sealing device (S1) to the first sealing device (S1) side. Equipment for quantitative supply of things.   In the rotor body (Rm), the object to be transferred (1) is dropped when the object to be transferred (1) falls from the transfer chamber (C) into the transfer pipe (P) through the outlet (O). The apparatus for quantitatively supplying an object to be transferred according to any one of claims 1 to 6, further comprising a peeling accelerating means for accelerating peeling from the inner surface of the transfer chamber (C). A method for calculating a supply amount of an object to be transferred in a transfer system using the quantitative supply device according to claim 1,
The correlation between the rotational speed of the rotor (R) and the supply flow rate of the object to be transferred (1) from the quantitative supply device (SS) to the transfer pipe (P) is obtained in advance.
A method for calculating a supply amount of an object to be transferred, which measures the rotational speed of the rotor (R) and calculates the supply flow rate based on the measured value and the correlation. A method for calculating a supply amount of an object to be transferred in a transfer system using the quantitative supply device according to claim 1,
The amount of fall of the transferred object (1) when falling into the transfer pipe (P) from the transfer chamber (C) through the outlet (O) is obtained in advance,
The number of times that the object to be transferred (1) falls from the transfer chamber (C) through the outlet (O) into the transfer pipe (P) is measured, and the object to be transferred is based on the measured value and the amount of fall. A method for calculating a supply amount of an object to be transferred, wherein the supply amount of a transfer object is calculated.

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