JP2009022830A - Valve apparatus for switching nozzle in boom multihead blowing pipe - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To surely seal a seal part while a chemical liquid being easily switched in a pressurized state in a nozzle switching valve apparatus so as to switch and introduce a chemical liquid fed to a blowing pipe to a desirable selected nozzle. <P>SOLUTION: A boom multihead blowing pipe A is divided into a connecting part 1 and a blowing head part 2. A shaft tube part 11 projecting toward the blowing head part 2 is installed in the connecting part 1 and a notching part 5 is formed on a part of the peripheral surface of the shaft tube part 11 to open an opening 50 on its bottom surface. A sheet 7 of which the outer surface side is of an arc shape is fitted in the notching part 5 through an O ring 71 and a transparent opening 70 is opened at a portion facing the opening 50 of the sheet 7. An opening 21 leading to a nozzle connecting opening 20 on its inner peripheral wall is opened circumferentially in parallel in the blowing head part 2. This blowing head part 2 is rotatably fitted to the outer periphery of the shaft tube part 11 of the connecting part 1. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  According to the present invention, a plurality of nozzles provided with a plurality of nozzles are attached to an intermediate portion of a boom-like long liquid guide pipe in parallel in the longitudinal direction of the liquid guide pipe, and a chemical solution is arranged in parallel. The present invention relates to an improvement in a nozzle switching valve device that switches supply of a chemical solution to a plurality of nozzles provided on the tip side of a body of a jet tube in a boom multi-head jet tube that is sprayed at a time.

  The boom multi-headed jet tube has a connection port connected to a branch pipe in the longitudinal direction of the liquid guide pipe in the longitudinal middle part of the long boom-shaped liquid guide pipe mounted on the fuselage body for spraying the chemical liquid. A large number of them are installed in parallel, and each of these connection ports is connected to an injection pipe equipped with a plurality of nozzles. It is used so that it is sprayed at once from each of the nozzles provided in a large number of nozzles that are supported in parallel with the boom-shaped liquid introduction pipe.

  A jet tube (boom multi-headed jet tube) that is assembled and connected in parallel with an intermediate portion of a boom-shaped liquid guide tube is usually a base end of a body a formed in a cylindrical shape of the jet tube A as shown in FIG. The connecting portion 1 on the side is provided with a connecting tube 10 that is connected to a connecting port b provided in a branch shape in the boom-shaped liquid introduction tube B, and a plurality of nozzle connecting ports are provided on the jet head 2 on the distal end side of the body a. 20 is provided so as to project radially from the outer peripheral surface. In the body a, there are a plurality of conduits for guiding the chemical introduced from the connection pipe 10 toward the nozzle n connected to the nozzle connection port 20, and a plurality of the pipes. A switching valve device that switches to select and communicates with one of the nozzles n of the nozzle n, and when the liquid spraying operation is stopped, the liquid drop is prevented from dropping around the nozzle due to the residual pressure of the chemical liquid It has a configuration with a button drop prevention valve mechanism That.

  The conventional nozzle switching valve device that equips the boom multi-headed jet tube A to switch the flow of the chemical solution to the plurality of nozzles provided on the distal end side of the body a is as follows. A valve is used to close a plurality of valve ports and release only one valve port in order, or (2) a flow path for a chemical solution in the body on the wall surface that forms the seal portion of the cylindrical body An annular ring made of a soft resin is rotatably fitted on the outer peripheral side of the wall surface forming the seal portion, and the seal portion is sealed on the inner peripheral surface thereof. A communication port communicating with each of the plurality of nozzles is provided in parallel in the rotation direction, and the communication with the plurality of nozzles is switched by rotation of the ring, or (3) a conical shape made of a rotating metal material Each of a plurality of nozzles provided on the wall surface having a concave surface with an opening that leads to the flow path of the chemical solution established on the peripheral surface of the conical body. This is done by any one of the three means of sequentially switching and facing the opening communicating with the.

  In these first means, the first means of (1) closes the main plug of the liquid supply passage for supplying the chemical liquid to the boom multi-headed jet tube A, and lowers the pressure of the chemical liquid in the jet tube A. There is a problem that the nozzles cannot be switched in accordance with the condition of the object to be sprayed at the working position where the spraying is performed because the switching cannot be performed unless the state is set.

  The second means (2) is capable of switching at the working position while the chemical solution in the liquid supply passage remains in a pressurized state, but the ring is heavy and the flow channel for supplying the chemical solution is used. It is difficult to correctly match the opening that communicates with the opening that communicates with the flow path on the nozzle side, and it takes time to set the switching. Further, there is a problem that the seal portion is insufficiently sealed, and when the pressurization pump is operated at the start of work and the hand cock is opened, water leakage and dripping from the switching mechanism portion increase.

  Further, in the third means (3), there is a problem that a rotating operation for switching becomes difficult if the seal is sufficient because of a conical mechanism in which metal materials are joined together.

  The problem to be solved by the present invention is that a boom multi-headed jet tube is fed to a plurality of nozzles provided on the distal end side of the body of the boom from a connection port provided on the proximal end side of the body. A nozzle switching valve device that equips the nozzle switching valve device to switch and guide the chemical solution to one nozzle selected as desired from among the plurality of nozzles, and opens the cock at hand to reach the nozzle. In the state where the pressure is applied, the sealing portion can be surely sealed while the switching setting operation can be easily performed.

In order to solve the above-described problem, in the present invention, as described in claim 1,
The body “a” of the boom multi-head jet tube A is divided into a connection portion 1 having a connection pipe 10 provided in a peripheral shape on a peripheral surface and a jet head 2 having a plurality of nozzle connection ports 20 provided radially on the peripheral surface. The portion 1 is formed with a cylindrical portion 11 having a flow path 6 that communicates with a pipe line in the connecting pipe 10 on the distal end side, and having an outer diameter corresponding to the inner diameter of the jet head 2. Protruding toward the jet head 2, the shaft tube portion 11 is formed with a notch 5 in a part of the peripheral surface, and an opening 50 is formed on the bottom surface of the notch 5 to communicate with the flow path 6. An elastic material in which a sheet 7 made of a soft resin such as Teflon (registered trademark) whose outer surface side is an arc surface following the inner peripheral wall of the jet head 2 is disposed around the opening 50 in the notch 5. A through-hole 70 is formed through the outer surface of the seat 7 at a portion facing the opening 50. In addition, the jet head 2 is provided with openings 21 in parallel with each other in the circumferential direction, which are connected to the plurality of nozzle connection ports 20 provided on the outer peripheral side on the inner peripheral wall of the jet head 2. Is fitted to the connection portion 1 so as to be rotatable and integrally coupled to the outer periphery of the shaft tube portion 11, and by switching the jet head 2 relative to the connection portion 1, switching water flow and water stoppage for the plurality of nozzle connection ports 20 are performed. In connection with this, a nozzle switching valve device in a boom multi-headed jet tube, which is characterized by being performed, is proposed.
The outer peripheral surface of the shaft tube portion 11 projecting from the distal end side of the connection portion 1 and the inner peripheral surface of the jet head 2 fitted to the shaft tube portion 11 are provided in one of the directions along the axis line. The engaging grooves 4 are provided in an annular shape in parallel at a predetermined pitch in the circumferential direction, and the other is provided with engaging protrusions 40 that are sequentially switched and engaged with the engaging grooves 4 in a frame-feed manner. The water flow state position where the opening 21 opened in the inner peripheral wall of the jet head 2 is joined to the through hole 70 opened in the seat 7 provided in the shaft cylinder portion 11 is engaged with the groove 4 and the engagement protrusion 40; The boom according to claim 1, wherein the boom is set so as to be performed at a water stop state position where the inner peripheral wall of the jet head 2 between the opening 21 and the opening 21 is joined to the through hole 70. Proposed nozzle switching valve device in multi-head jet tube,
The flow path 6 formed in the shaft tube portion 11 provided so as to protrude from the distal end side of the connection portion 1 is extended toward the proximal end side of the connection portion 1 by an inner tube 80 mounted on the shaft core portion in the connection portion 1. Then, an opening 81 on the proximal end side of the inner cylinder 80 is opened to the inner cavity of the connecting portion 1, and an annular flow channel 82 is formed around the inner cylinder 80. 81 and the opening 83 of the flow path 82 formed in an annular shape around the inner cylinder 80 abut the valve membrane 84 inserted from the opening 14 on the proximal end side of the connecting portion 1, and the spring 86 closes the closing side The nozzle switching valve device for a boom multi-headed jet tube according to claim 1, wherein the nozzle switching valve device is urged to be attached to and held in the connecting portion 1 by a cap 88.

  In the nozzle switching valve device in the boom multi-headed jet tube according to the present invention, the seal of the switching portion for switching and communicating the opening 50 provided in the flow path of the chemical solution inside the jet tube with respect to the openings 21 respectively connected to the plurality of nozzles, On the sliding surface between the arc-shaped outer surface of the sheet 7 fitted through the O-ring 71 made of an elastic material and the inner peripheral wall of the jet head 2 in the notch portion 5 formed on the peripheral surface on the tip end side of the shaft tube portion Therefore, the sliding operation is small, and the switching operation performed by rotating the jet head 2 with respect to the connection portion 1 which is the main body of the jet tube can be easily performed without requiring a large force.

  The seal of the switching portion is reliable because the arcuate outer surface side of the seat 7 comes into close pressure contact with the inner peripheral surface of the jet head 2 by the elastic restoring force of the elastic O-ring 71. Become.

  In addition, a large number of engaging grooves 4 arranged in a ring shape between the nozzle 11 provided on the connecting portion 1 serving as the main body of the jet tube and the jet head 2 rotating on the outer periphery thereof, and these When the engaging protrusion 40 that sequentially engages the engaging groove 4 in a frame-feed manner is provided so that positioning is performed when the jet head 2 is rotated with respect to the connecting portion 1, one frame at a time, By rotating, it becomes possible to switch between a water flow state and a water stop state appropriately.

  Further, the button dropping prevention valve mechanism incorporated in the injection tube operates properly by utilizing the shaft tube portion 11 of the nozzle switching valve device.

  Next, embodiments of the present invention will be described in detail with reference to the drawings of the embodiments.

  FIG. 2 is a longitudinal sectional view of a boom multi-headed jet tube A embodying the present invention, FIG. 3 is a front view of the same jet tube, and FIG. 4 is a longitudinal view in a state where each component is disassembled before assembling the same jet tube A. It is a side view.

  In FIG. 2, A is the whole of the injection tube, a is the body of the injection tube A, 1 is the connection portion on the base end side of the body a, and the connection tube 10 is provided in a peripheral shape on the peripheral surface, and 2 is the body The jet head which provides the some nozzle connection port 20 which protrudes radially on the surrounding surface of the front end side of a is shown.

  As shown in FIG. 5, the body “a” of the jet tube A is provided with a cylindrical connection portion 1 provided with a connection tube 10 projecting in a support tube shape on the peripheral surface, and a plurality of nozzle connection ports 20 on the peripheral surface. The connecting portion 1 and the jet head 2 are molded separately from each other by a resin material.

  In the jet head 2 formed into a cylindrical shape, openings 21 communicating with the respective nozzle connection ports 20 provided on the outer peripheral side are formed in the inner peripheral wall of the jet head 2 at positions equally distributed in the circumferential direction. An assembly hole 22 is formed in the end wall on the distal end side.

  The connecting portion 1 is integrally and continuously provided with a shaft cylinder portion 11 fitted into the inner cavity of the jet head 2 at the distal end side thereof. The shaft cylinder portion 11 has an outer diameter corresponding to the inner diameter of the jet head 2, a protruding length L corresponding to a length L ′ in the axial direction of the jet head 2, and a shaft core wire connected thereto It is provided so as to align with the axis of the part 1. A shaft flange portion 12 is provided at the distal end of the shaft cylinder portion 11 so as to be fitted into and protrude from an assembly hole 22 formed in the center portion of the end wall on the distal end side of the jet head 2. Is provided with an annular groove 13 into which the retaining ring 3 is fitted.

  Then, the connecting portion 1 and the jet head 2 are provided in the end wall on the tip side of the jet head 2 by inserting the shaft cylinder portion 11 projecting from the tip side of the connection portion 1 into the inner cavity of the jet head 2. By inserting and retaining the retaining ring 3 in the annular groove 13 of the shaft flange portion 12 protruding from the assembled hole 22, the jet head 2 is connected to the connecting portion 1 with the shaft tube portion 11 as a support shaft. They are connected in a state of being connected so as to rotate freely.

  On one of the outer peripheral surface on the base end side of the shaft tube portion 11 and the inner peripheral surface on the base end side of the jet head 2, an engagement groove 4 in the direction along the axial center line is provided on one of them in the circumferential direction. Provided in parallel with the pitch in a rack shape so as to be continuous in an annular shape, and provided on the other side are engagement protrusions 40 that fit into the engagement grooves 4, and the engagement grooves 4 and the engagement protrusions 40 are fitted to each other. Thus, when the jet head 2 is rotated with respect to the connecting portion 1 about the shaft tube portion 11, positioning is performed so as to temporarily stop the rotation one by one.

  Further, on the peripheral surface on the distal end side of the shaft tube portion 11, a cutout portion 5 having a crescent shape as viewed in the axial direction and having a flat bottom surface is formed on a part of the peripheral surface. An opening 50 is formed in the center portion of the bottom surface and communicated with the chemical liquid flow path 6 formed in the shaft core portion of the shaft cylinder portion 11. Further, an annular concave groove is formed on the peripheral surface of the opening 50. 51 is formed. The opening 50 is sequentially formed in the opening 21 of the nozzle connection port 20 opened in the inner peripheral wall of the jet head 2 by the rotation of the jet head 2 in a state where the shaft tube portion 11 is fitted and assembled in the inner cavity of the jet head 2. , And are set and set at positions facing each other.

  7 is a sheet that is fitted into a notch 5 that is formed on a part of the peripheral surface on the front end side of the shaft cylinder 11, and is a soft resin material such as Teflon (registered trademark), the lower surface is flat, and the upper surface is a jet. An arc surface that follows the inner wall surface of the portion 2 is formed in a crescent shape that fills the cutout portion 5 when viewed in the axial direction, and when the cutout portion 5 is fitted into the cutout portion, the cutout portion is formed. A through hole 70 penetrating on the upper surface side of the sheet 7 is provided at a portion corresponding to the opening 50 provided on the bottom surface of 5.

  And this sheet 7 is inserted in the notch 5 formed in a part of the peripheral surface of the shaft cylinder part 11 before the shaft cylinder part 11 is inserted in the lumen of the jet head 2, In this state, it is inserted into the inner cavity of the jet head 2 together with the shaft tube portion 11.

  At this time, an O-ring 71 made of an elastic material is fitted in an annular groove 51 formed around the opening 50 opened on the bottom surface of the notch portion 5, and this sheet together with the shaft tube portion 11 is fitted. When 7 is inserted into the inner cavity of the jet head 2, the periphery of the joint portion between the opening 50 and the through hole 70 provided in the sheet 7 is crushed between the bottom surface of the notch 5 and the lower surface of the sheet 7. The O-ring 71 made of an elastic material becomes watertight.

  Further, the seal between the edge of the through hole 70 opened on the upper surface of the sheet 7 and the inner peripheral wall of the jet head 2 is formed by the arc-shaped upper surface of the sheet 7 formed of a soft resin material. The elastic restoring force of the O-ring 71 is pressed against the inner peripheral wall of the jet head 2 so that the sliding contact surfaces are used.

  That is, the chemical solution is guided from the lumen of the connecting tube 10 to the opening 50 of the cutout portion 5 through the lumen 6 of the shaft tube portion 11, and the through hole 70 provided in the sheet 7 from the opening 50. The flow path of the chemical solution provided in the body a of the injection tube A so as to lead to the nozzle n to be attached to the nozzle connection port 20 through the opening 21 of the nozzle connection port 20 is one of the peripheral surface of the shaft tube portion 11. The through-hole 70 that can be formed in the sheet 7 fitted in the notch portion 5 provided in the portion of the nozzle connection port 20 selected from among the openings 21 that communicate with the plurality of nozzle connection ports 20 provided in the jet head 2. When the connection with the opening 21 is established, the arcuate upper surface of the sheet 7 positioned around the joint portion between the through hole 70 and the opening 21 is pressed against the inner peripheral surface of the jet head 2. Sealing is performed at the pressure contact portion, leakage of the chemical solution from the flow path and other openings 21. When the through hole 70 of the seat 7 is located between the opening 21 and the opening 21 formed in the inner peripheral wall of the jet head 2, the upper surface side of the seat 7 and the jet head 2 Sealing is performed at the pressure contact surface with the inner peripheral wall to block communication with the nozzle connection port 20 of the flow path, and a water stop state is established.

  The sheet 7 is rotated along the inner surface of the inner peripheral wall of the jet head 2 by the rotation of the shaft cylinder portion 11, whereby the through holes 70 of the sheet 7 are switched with respect to the respective openings 21 of the plurality of nozzle connection pipes 20. The state of water flow performed by the connection and the water stop state due to the positioning of the through hole 70 of the seat 7 between the opening 21 and the opening 21 are the By positioning the rotational position by the engagement performed in a frame-feed manner, the engagement groove 4 and the engagement protrusion 40 provided between the outer peripheral surface and the inner peripheral surface of the base end portion of the jet head 2 are alternately arranged. Is set to be performed.

  8 is the pressure of the chemical liquid remaining in the flow path of the chemical liquid from the liquid introduction pipe B to the nozzle n provided on the tip side of the injection pipe A when the main plug at hand is closed to temporarily stop the spraying work. In order to prevent the chemical liquid from dropping from around the nozzle n, a prevention valve mechanism for preventing the dropping of the liquid is provided in the body a of the injection tube A.

  In this embodiment, the prevention valve mechanism 8 is protruded toward the distal end side of the connecting portion 1 so as to constitute a nozzle switching valve device that allows the chemical liquid to flow and stop the water in the nozzle n as described above. The shaft cylinder portion 11 provided is configured.

  That is, the flow path 6 formed in the axial core portion of the shaft cylinder portion 11 is extended toward the proximal end side of the connection portion 1 by the inner cylinder 80 installed in the axial core portion of the lumen of the connection portion 1. The connecting tube 10 is opened to the inner cavity of the connecting portion 1 by the opening 81 on the proximal end side of the inner tube 80, and is provided around the inner tube 80 as a support tube on the outer peripheral side of the connecting portion 1. An annular channel 82 communicating with the inner pipe line is formed, and the opening 83 on the downstream side of the annular channel 82 is released around the opening 81 on the base end side of the inner cylinder 80, A disc-shaped valve membrane 84 made of an elastic material such as a rubber material is inserted into the opening 81 and the opening 83 from the opening 14 that opens to the base end side of the connecting portion 1 and closes. 84, the opening 11 on the proximal end side of the connecting portion 1 is closed by the peripheral portion of the connecting portion 1, and a coil spring is provided on the outer surface side of the valve membrane 84 via a spring seat 85. 6, the other end side of the coil spring 86 is supported by a spring cover 87, and the base of the connection portion 1 is secured by a cap 88 that is screwed to the outer periphery of the connection portion 1 on the base end side. It is configured by fixing to the end side.

  The preventive valve mechanism 8 for preventing the dropping of the so configured is configured to flow into the body a through the connecting pipe 10 when the main plug at hand is open and the chemical liquid pressurized by the pump is supplied. The valve membrane 84 is pushed outward against the spring pressure of the coil spring 86 by the pressure of the incoming chemical solution, and the opening 83 of the annular channel 82 and the opening 81 on the proximal end side of the inner cylinder 80 are opened. Then, the chemical solution flows through the opening 81 and the opening 83 to the flow path 6 inside the shaft tube portion 11, reaches the nozzle switching valve device, and the through hole 70 opened in the seat 7 of the device is the shaft tube portion 11. When the water is in communication with the opening 21 of the selected nozzle connection port 20 due to the rotation of the nozzle, the water is sprayed from the nozzle n. Also, the main plug at hand is closed and sprayed temporarily. When the operation is stopped, the valve membrane 84 is attached to the coil spring 86. In closed, chemical from the sealing portion of the nozzle switching valve device by residual pressure of the chemical liquid in Shirubeekikan B acts to prevent the fall button.

It is outline | summary explanatory drawing of a beam multi-head jet tube. 1 is an overall perspective view of a beam multi-head tube that implements a nozzle switching valve device according to the present invention. It is a vertical front view of a jet tube same as the above. It is the side view seen from the front end side of a beam multiple head tube same as the above. It is the longitudinal cross-sectional view which decomposed | disassembled the jet tube same as the above. It is an enlarged front view of the principal part of a jet tube same as the above. It is a longitudinal cross-sectional view of the II line in FIG. 3 of a jet tube same as the above.

Explanation of symbols

A Boom multi-head jet B B Liquid introduction pipe L Projection length L 'Length in the axial direction a Body b Connection port n Nozzle 1 Connection part 10 Connection pipe 11 Shaft tube part 12 Shaft flange part 13 Groove 14 Opening port 2 Jet head DESCRIPTION OF SYMBOLS 20 Nozzle connection port 21 Opening 22 Assembly hole 3 Retaining ring 4 Engagement groove 40 Engagement protrusion 5 Notch part 50 Opening 51 Annular groove 6 Flow path 7 Seat 70 Through-hole 71 O-ring 8 Prevention valve mechanism 80 Inner cylinder 81 Open port 82 Channel 83 Open port 84 Valve membrane 85 Spring seat 86 Coil spring 87 Spring cover 88 Cap

Claims (3)

  The body (a) of the boom multi-head jet tube (A) has a connection portion (1) in which a connection pipe (10) is provided on the peripheral surface in a support tube shape, and a plurality of nozzle connection ports (20) are radially formed on the peripheral surface. It is divided into the jet head (2) provided, and the connecting tube (1) is provided with a shaft tube portion (11) provided with a flow path (6) communicating with a pipe line in the connecting tube (10) inside the connecting portion (1). ) Is formed in a cylindrical shape with an outer diameter corresponding to the inner diameter of the jet head (2) and protrudes toward the jet head (2). The shaft cylinder portion (11) has a part of the peripheral surface. A notch (5) is formed, an opening (50) is formed on the bottom surface of the notch (5) and communicates with the flow path (6). 2) An O-ring (71) made of an elastic material is disposed around the opening (50) with a sheet (7) made of a soft resin such as Teflon (registered trademark) having an arc surface following the inner peripheral wall of 2). The through-hole (70) penetrating to the outer surface side is opened in the portion facing the opening (50) of the sheet (7), and the inner peripheral wall of the jet head (2) is provided. An opening (21) that communicates with each of the plurality of nozzle connection ports (20) provided on the outer peripheral side is opened in parallel in the circumferential direction, and this jet head (2) is connected to the axial tube portion of the connection portion (1). A plurality of nozzle connection ports (20) can be switched by rotating the jet head (2) with respect to the connection portion (1) by being fitted to the outer periphery of (11) so as to be rotatable and integrally coupled to the connection portion (1). A nozzle switching valve device in a boom multi-head jet tube, wherein water flow and water stop are performed.   The outer peripheral surface of the shaft tube portion (11) projecting from the distal end side of the connection portion (1) and the inner peripheral surface of the jet head (2) fitted to the shaft tube portion (11) Is provided with an annular groove (4) in a direction along the axial center line in parallel with a predetermined pitch in the circumferential direction, and the other is sequentially switched and engaged with the engagement groove (4) in a frame-feed manner. A through hole (70) provided with an engagement protrusion 40 and opening the engagement groove (4) and the engagement protrusion (40) in the sheet (7) provided in the shaft tube portion (11). On the other hand, the water-flowing position where the opening (21) opened on the inner peripheral wall of the jet head (2) joins, and the jet head (2) between the opening (21) and the opening (21) with respect to the through hole (70) The nozzle cutting in the boom multi-head jet tube according to claim 1, wherein the inner peripheral wall is set so as to be performed at a water stop state position where the inner peripheral wall is joined. For example valve device.   The flow path (6) formed in the shaft tube portion (11) provided so as to protrude from the distal end side of the connection portion (1) is provided by the inner tube (80) mounted on the shaft core portion in the connection portion (1). Extending toward the base end side of the connection portion (1), the inner tube (80) is opened to the inner cavity of the connection portion (1) by an opening (81) on the base end side of the inner tube (80). An annular channel (82) is formed around the inner cylinder (80) and an opening (81) of the inner cylinder (80), and an opening of the channel (82) formed in an annular shape around the inner cylinder (80). (83) is brought into contact with the valve membrane (84) inserted from the opening (14) on the proximal end side of the connecting portion (1), and is biased toward the closing side by the spring (86) and is moved by the cap (88). The nozzle switching valve device in a boom multi-head jet tube according to claim 1, wherein the nozzle switching valve device is assembled and held in the connection portion (1).

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