JP2017000968A - Nozzle extraction device and extraction method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an extraction device which smoothly and easily extracts a nozzle from an adapter even in a small work space, and to provide an extraction method.SOLUTION: An extraction device includes: a chucking member which may engage with a groove part or a step part extending in a circumferential direction of a nozzle; a cylindrical body which houses the chucking member and may contact with an adapter; and a driving unit for at least moving the chucking member rearward in the cylindrical body. The chucking member includes claw members which are disposed adjacent to each other in the circumferential direction and may engage with the groove part or the step part.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a device that can efficiently extract or remove a nozzle attached to an adapter and a method for extracting the nozzle when replacing a nozzle such as a descaling nozzle.

  A descaling nozzle is used to remove scale on the hot rolled steel sheet. In this descaling nozzle, a cap is screwed and fixed to an adapter attached to the header, and fluid (water or the like) in the header is ejected from the descaling nozzle. For example, Japanese Patent Laying-Open No. 2012-76134 (Patent Document 1) describes that a predetermined descaling nozzle is attached to a header that supplies a fluid.

  In such a descaling nozzle, foreign matter in the water accumulates in the clearance (gap) between the adapter and the descaling nozzle (hereinafter sometimes simply referred to as a nozzle) in the header flow path, and the cap is removed. In some cases, the nozzle is fixed to the adapter, and the nozzle cannot be removed or replaced by human power.

  In order to extract the nozzle fixed to the adapter in this way, a U-shaped or C-shaped remover is inserted into a groove formed in the vicinity of the nozzle discharge port and turned to remove the nozzle using torque. It has been broken. In this method, a large torque can be applied using a spanner or the like, and the nozzle can be extracted from the adapter. However, a large work space is required for extracting the nozzle.

  It is also known that a claw portion of a jig is engaged with a groove formed near the nozzle discharge port, and the nozzle is pulled out from the adapter by pulling or rotating the jig. For example, the claw part of the jig is engaged with a groove formed near the nozzle discharge port, the movable handle part is pulled abruptly, the jig is pulled in the axial direction of the shaft, and an impact force is applied to the nozzle. Also known is a pull-out remover to remove For example, as shown in FIG. 13, the remover 61 includes a shaft portion 62 and an engagement portion 63 having a circular cross section formed integrally with the shaft portion. A semicircular arc-shaped peripheral wall portion 64 having a predetermined height formed at the peripheral edge portion, an engagement groove 65 formed on the inner peripheral wall of the peripheral wall portion and having a width that decreases in the circumferential direction, and the engagement groove An engagement wall 66 formed between the end wall of the tip and engageable with the groove 5 of the nozzle 1 is provided. By bringing the entrance of the engagement groove 65 of the remover 61 close to the side and contacting the tip of the nozzle 1, engaging the engagement wall 66 with the groove 5 of the nozzle 1, and pulling the shaft 62. The nozzle 1 can be extracted. However, in this remover 61, the removed nozzle 1 may be detached from the jig and dropped into the floor or equipment.

  Furthermore, a screw remover is also known for removing the nozzle by engaging the claw of the jig with the groove formed near the nozzle outlet, pressing the tip of the guide against the adapter, and rotating the handle counterclockwise. ing. This method can prevent the nozzle from falling off. However, it is necessary to rotate the handle, and a large work space is required.

  In particular, in order to engage the claw portion with the groove portion of the nozzle using these remover or extraction device, it is necessary to bring the claw portion closer to the nozzle from the side direction, from the central axis of the nozzle. A predetermined space is required in the side direction. On the other hand, in order to protect the nozzle, a protector having an opening corresponding to the nozzle tip is attached to the header of the hot rolling line in the vicinity of the nozzle tip. Therefore, the nozzle extraction work space is greatly limited, and the remover or the extraction device cannot smoothly extract or replace the nozzle.

JP 2012-76134 A (Claim 9)

  Accordingly, an object of the present invention is to provide an extraction device and an extraction method that can smoothly extract a nozzle.

  Another object of the present invention is to provide an extraction device and an extraction method capable of easily extracting a nozzle from an adapter even in a small work space.

  Still another object of the present invention is to provide an extraction device and an extraction method capable of easily extracting a nozzle from an adapter with a simple operation and preventing the extracted nozzle from dropping off.

  Another object of the present invention is to provide an extraction device and an extraction method capable of smoothly extracting a nozzle by securely and firmly engaging a claw with the groove without damaging the groove of the nozzle. There is.

  As a result of intensive studies to achieve the above-mentioned problems, the present inventors have found that a plurality of claw members are disposed adjacent to each other in the circumferential direction with a chucking member that can be locked to a groove extending in the circumferential direction of the nozzle. If it is formed, it can be chucked by engaging a plurality of claw members in the circumferential direction (or the entire circumference) of the groove portion by moving along the central axis of the nozzle, and it is possible to prevent the extracted nozzle from dropping off, and the groove portion of the nozzle When pulled along the central axis of the nozzle while being engaged with the nozzle, damage to the nozzle can be prevented even if a large force is applied, so that only a small working space (for example, a portion corresponding to the nozzle tip) Even if it is a small space that is open and the tip of the nozzle is protected by a protector), the extraction work can be performed smoothly, and the stroke for traction can be reduced. It found that can be made compact and lightweight and have completed the present invention.

  That is, the extraction device (extraction or extraction device) of the present invention for extracting the nozzle attached to the adapter includes a chucking member that can be locked to a groove or step extending in the circumferential direction of the nozzle. A cylinder that can accommodate the chucking member and that can contact the adapter; and a drive unit that moves the chucking member at least backward relative to the cylinder in the cylinder. The chucking member includes a plurality of claw members that are arranged adjacent to each other in the circumferential direction and can be locked with the groove or step.

  In such an apparatus, the groove part or the step part of the nozzle can be chucked in the circumferential direction by a plurality of claw members. Therefore, along the axial direction of the nozzle, the cylindrical body can be advanced to bring the tip of the cylindrical body into contact with the adapter, and the groove or step of the nozzle can be chucked in the circumferential direction with a plurality of claw members. Further, by causing the chucking member to move backward relative to the cylindrical body along the axial direction of the nozzle by the drive unit, the tip (contact portion) of the cylindrical body with respect to the adapter serves as a base point or a fulcrum. The nozzle can be extracted or extracted from the adapter while the chucking member is locked or engaged with the groove or step of the nozzle.

  The plurality of claw members may be openable and closable in the radial direction with respect to the central axis. Moreover, you may provide the string member which can open | release a some claw member to radial direction by towing | pulling, and can cancel | release the latching with respect to the groove part or step part of a nozzle.

  Further, the plurality of claw members have a form that narrows toward the drive unit side in the axial direction (for example, a triangular or U-shaped form), and an opening / closing operation unit (tip) is provided to open the claw member in the radial direction. A rear end portion on the side opposite to the claw portion on the part side) may be provided. Further, in the circumferential direction of these opening / closing operation portions, a bridging portion (or a penetrating through hole) through which the operation string can be bridged may be formed, and an insertion hole extending in the radial direction of the cylindrical body is formed. In a state where a plurality of claw members are arranged adjacent to each other in the circumferential direction, an operation string is bridged over the bridging portion (or the operation string is inserted into the through hole), and the converged operation string Both end portions may be inserted through the insertion hole. By pulling the operation string (both ends of the converged operation string), the opening / closing operation unit may be converged to open the plurality of claw members. In addition, it may be possible to close the plurality of claw members by releasing the operation string and releasing the opening / closing operation unit.

  Further, in order to smoothly open and close the plurality of claw members, a tapered portion is formed on the inner wall of the front end portion of the claw member to open the front end portion of the claw member in the radial direction as the nozzle moves forward. In addition, an elastic member (such as a ring-shaped member formed of an elastically deformable spring or rubber) is arranged to close the tip of the claw member in the radial direction as the nozzle moves forward with respect to the groove or step. You may set up.

  Furthermore, in order to smoothly open and close a plurality of claw members, the inner wall of the opening / closing operation portion of the opposing claw member may be inclined at an angle of taper θ1 = 20-40 °, and the opening / closing operation of the adjacent claw member is performed. The end wall of the part may be inclined at an angle of taper θ2 = 40 to 80 °.

  The chucking member may be capable of moving forward with respect to the cylinder, and may be capable of moving forward and backward within the cylinder (or the chucking member can be accommodated within the cylinder).

  More specifically, the front end portion and the rear end portion are supported (or pivotable) so as to be openable and closable (or swingable) in the radial direction at the front end portion of the cylinder that can move forward and backward, and in the circumferential direction. A plurality of claw members disposed adjacent to the claw member; a claw portion formed on the inner wall of the front end portion of the claw member and engageable with a groove portion or a step portion of the nozzle; and a claw portion of the plurality of claw members A taper portion that is formed on the inner wall (inlet side inner wall) closer to the tip portion and opens the tip portions of the plurality of claw members in the radial direction as the nozzle moves forward; and supports the tip portions of the claw members A groove portion formed in a circumferential direction between the first and second portions; an elastically deformable member (such as an elastically deformable ring member) that can be attached to the groove portion and radially closes the distal end portion of the claw member; A through-hole formed in the circumferential direction at the rear end of the claw member; And a hollow cylindrical tube that can contact the adapter; an insertion hole formed through the tube corresponding to (or in association with) the through-hole; An operation string that can be inserted in a through hole extending across the circumferential direction of the plurality of claw members and having both ends converged in the insertion hole while being arranged adjacent to each other in the direction. And may be provided.

  Furthermore, you may equip the front-end | tip part of a cylinder, and you may provide the hollow cylinder spacer cylinder which can contact an adapter. When such a spacer cylinder is attached to the tip of the cylinder, the pulling length can be secured with the spacer cylinder even if the drive unit (for example, hydraulic cylinder) has a small advance / retreat area (stroke). The nozzle can be easily pulled out.

  In the present invention, the tip of the cylinder that can accommodate the chucking member is brought into contact with the adapter, and the chucking member is locked to the groove or step extending in the circumferential direction of the nozzle mounted on the adapter. In this state, the chucking member is moved backward relative to the cylinder by the drive unit by the drive unit, and the nozzle is extracted from the adapter. Also included is an extraction method that includes a plurality of claw members that are disposed adjacent to each other in the circumferential direction and can be engaged with the groove or step.

  In the present invention, the chucking member can be moved backward in a state in which the plurality of claw members disposed adjacent to each other in the circumferential direction are locked and chucked with respect to the groove or step extending in the circumferential direction of the nozzle. Therefore, the nozzle can be extracted smoothly. Moreover, since the chucking operation and the extraction operation can be performed along the central axis of the nozzle, the nozzle can be easily extracted from the adapter even in a small work space. Further, the nozzle can be easily extracted from the adapter by a simple operation such as a contact operation between the adapter and the cylindrical body and a backward movement of the chucking member, and the extracted nozzle can be prevented from dropping off. In addition, since a plurality of claw members can be locked and chucked in the circumferential direction with respect to the groove or step of the nozzle, the claw can be attached to the groove or step without damaging the groove or step of the nozzle. The nozzle can be pulled out smoothly by engaging securely and firmly.

FIG. 1 is a schematic cross-sectional view showing an example of the extraction device of the present invention. FIG. 2 is a schematic cross-sectional view showing the chucking member of FIG. FIG. 3 is a schematic cross-sectional view showing the relationship between a plurality of claw portions constituting the chucking member of FIG. 1 and an operation string. FIG. 4 is a schematic cross-sectional view showing the relationship among the plurality of claw portions, cylinders, and operation strings in FIG. FIG. 5 is a schematic bottom view showing a plurality of claw portions of FIG. 6 shows a cross-sectional view taken along line VI-VI in FIG. FIG. 7 is a schematic side view showing a plurality of claw portions of FIG. FIG. 8 is a bottom view taken along line VIII-VIII in FIG. FIG. 9 is a schematic cross-sectional view for explaining the operation of the extraction device of FIG. FIG. 10 is a schematic cross-sectional view showing how the nozzle is attached to the header. FIG. 11 is a schematic perspective view showing the attachment state of FIG. FIG. 12 is a schematic view showing another example of the extraction device of the present invention, FIG. 12 (A) is a schematic perspective view of the spacer cylinder, and FIG. 12 (B) is the spacer cylinder of FIG. 12 (A). It is a general | schematic fragmentary sectional view which shows the extraction apparatus with which it mounted | wore. FIG. 13 is a schematic cross-sectional perspective view showing a conventional remover.

  Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

  As shown in FIGS. 10 and 11, a descaling nozzle (hereinafter sometimes simply referred to as a nozzle) 1 is mounted in a predetermined direction with respect to an adapter 8 mounted at a predetermined position of the header 9. Usually, the cap 7 is screwed onto the threaded portion of the adapter 8 while the annular inner peripheral wall of the cap (fastening member) 7 is engaged with the flange portion 4 of the nozzle body 2. The header 9 is formed in a tubular shape by forming a fluid (water or the like) flow path, and the filter portion 3 on the upstream side of the descaling nozzle 1 is located in the header 9. The nozzle body 2 protrudes in a predetermined direction. Therefore, the fluid in the header 9 can be sprayed or injected from the discharge hole 6 of the nozzle 1. A groove 5 is formed on the peripheral surface of the tip of the nozzle body 2 (near the discharge hole 6).

  When such a descaling unit is used for a long period of time, foreign matter contained in the fluid in the header 9 enters the gap between the nozzle 1 and the adapter 8 to fix them, making it difficult to replace the nozzle 1. . In particular, in order to protect the nozzle 1, a protector 10 is attached in front of the header 9 so as to be close to the tip of the nozzle 1 with only a portion corresponding to the tip of the nozzle 1 being opened. That is, the protector 10 is mounted in a state where the tip end portion (discharge hole 6) of the nozzle 1 faces the opening portion 11 of the protector 10. Therefore, the extraction work space for the nozzle 1 is small, making it difficult to extract or replace the nozzle 1.

  Even in a nozzle fixed to the adapter in such a form, the nozzle can be easily extracted or extracted in the present invention.

  The extraction device (or extraction device) shown in FIG. 1 includes a plurality of claw members 31 that can be opened and closed in the radial direction at the distal end portion of a cylinder 21 that can move forward and backward, and the distal end portions of these claw members 31. A claw portion 32 that can be engaged with the groove portion 5 of the nozzle 1 is formed on the inner wall. The cylinder 21 is hydraulically advanceable / retractable cylinder body 22, coupled to the tip of the cylinder body (screwed in this example), and can be moved forward and backward together with the cylinder body 22, A holding member (supporting member) 26 that is screwed into a screwing recess formed at the distal end portion of the biasing pressing member and that can be attached so that the plurality of claw members 31 can be opened and closed in the radial direction adjacent to the circumferential direction. And. The cylinder 21 can be moved forward and backward by the hydraulic pressure from the oil inlet P.

  The holding member 26 is positioned at the front end portion of the cylinder 21 to form a support portion, and the front end portion and the rear end portion where the claw portion 32 is formed can be opened and closed in a radial direction (or swingable). The claw member 31 is supported, and the rear end portions of the plurality of claw members 31 form an opening / closing operation unit 35 for opening the plurality of claw members 31.

  The cylinder 21 and the claw member 31 are accommodated in a hollow cylindrical tube body 41 that can come into contact with the adapter 8 so as to be able to move forward and backward, and an outer peripheral portion of the cylinder 21 (cylinder body 22 and biasing pressing member 23). An urging member (coiled spring) 43 is disposed on the urging member, and this urging member engages with a flange 24 formed at the tip of the urging pressing member 23 to move the claw member 31 in the forward direction. Can be energized. Further, a guide portion 25 protrudes in the side direction from the biasing pressing member 23, and this guide portion moves along a guide hole (or insertion hole) formed in the axial direction on the wall portion of the cylindrical body 41. Or it can slide. Note that the inner wall at the tip of the hollow cylindrical tube 41 is in surface contact with the contact portion of the adapter 8, so that an inclined inner wall 42 is formed corresponding to the contact portion of the adapter 8.

  As shown in FIGS. 2 to 8, in order to smoothly open and close in the radial direction, the distal end portion of the claw member 31 is moved in the radial direction on the inner wall of the distal end portion of the claw member 31 as the nozzle 1 moves forward. A taper guide portion 33 for opening is formed. The angle θ of the taper guide portion is formed to be inclined at about 20 to 45 ° with respect to the axis of the cylinder body 22.

  Further, among the plurality of claw members 31 (31a to 31d), the opening / closing operation portion (end portion on the opposite side to the claw portion) 35 is narrowed toward the axial cylinder side (drive unit side) (triangular shape or The inner wall of the opening / closing operation portion 35 of the opposing claw members 31 (31a, 31c) (31b, 31d) is inclined at a predetermined taper angle θ1 = about 25 to 35 °. The end wall (adjacent end wall) of the opening / closing operation portion 35 of the adjacent claw member 31 is inclined at a predetermined taper angle θ2 = 55 to 65 °.

  Therefore, even when the plurality of claw members 31 are adjacent to each other in the circumferential direction, the plurality of claw members 31 can be smoothly opened and closed in the radial direction with respect to the central axis without being restricted or hindered. Therefore, the claw portions 32 of the plurality of claw members 31 adjacent in the circumferential direction can chuck (lock or engage) the groove portion 5 of the nozzle 1 over the entire circumference. The engaging part can be enlarged. For example, compared with the conventional remover shown in FIG. 13, the locking length or the engaging length with respect to the groove 5 can be improved by about twice.

  Furthermore, the opening / closing operation part (opening / closing operation part in a triangular or U-shaped form) 35 of each claw member 31 is formed with an accommodation groove part 37 that can accommodate the operation string 45 in the circumferential direction, and both sides of the accommodation groove part. A through hole 38 through which the operation string 45 can pass is formed at the end of the part. In addition, the holding member 26 is formed with insertion holes 27 through which both ends of the operation string 45 can be inserted, and both ends of the operation string 45 from the insertion holes converge. In this state, it is attached to the guide portion 25 through the guide hole (attached in a wound or fastened state or the like). That is, in this example, the guide hole formed in the cylindrical body 41 is used as an insertion hole for converging both ends of the operating string to pull or release the tow. In this example, the holding member 26 is formed with an insertion hole 27 extending in a direction orthogonal to the central axis. The operation string 45 accommodated in the accommodation groove portion 37 of the opening / closing operation portion 35, penetrating the through hole 38 and pulled out from the insertion hole 27 of the holding member 26 has a plurality of claw members adjacent in the circumferential direction. 31 has an outer shape that surrounds the outer periphery of the circular arc 31 and is pulled out from the insertion hole 27 (and the guide hole of the cylindrical body 41) across the center of the annular portion formed by the plurality of claw members 31. By pulling the operating string 45, the opening / closing operation portions 35 of the plurality of claw members 31 are converged (or converged) to apply a converging force (closing force) from the outer periphery to the center direction, and the claw portion 32 at the tip is moved. It can be opened.

  Further, a groove 39 is formed in the circumferential direction of the intermediate portion in the axial direction of each claw member 31, and an elastically deformable elastic ring member for closing the tip of the claw member 31 in the radial direction is formed in this groove. 40 (such as a rubber string or a rubber band) can be attached. The elastic ring member 40 holds the plurality of claw members 31 on the holding member 26 in cooperation with the operation string 45. In particular, the elastic ring member 40 is useful for holding the claw member 31 with respect to the holding member 26 as compared with the operation string 45.

  9, when the cap (fastening member) is removed from the adapter 8 as shown in FIG. 9, the extraction device is advanced along the central axis of the nozzle 1 (FIG. 9A). ), With the taper guide portion 33, the tip portions of the plurality of claw members 31 can be opened in the radial direction with the central axis as the center as the nozzle 1 moves forward (FIG. 9B). When the claw portions 32 of the plurality of claw members 31 reach the groove portion 5 of the nozzle 1, the claw portions 32 of the plurality of claw members are moved all around the groove portion 5 of the nozzle 1 using the contraction force of the elastic ring member 40. Can be engaged reliably and firmly. That is, when the claw portion 32 reaches the groove portion 5 of the nozzle 1, the claw portion 32 can be closed and chucked by the restoring force (contraction force) of the elastic ring member 40 (FIG. 9C). Then, when the cylinder body 22 is moved backward with a large force hydraulically along the central axis of the nozzle 1 with the tip portion (inclined inner wall) 42 of the cylindrical body 41 in contact with the adapter 8 (see FIG. 9 (D)), since the claw portions 32 of the plurality of claw members 31 are engaged and chucked over the entire circumference of the groove portion 5 of the nozzle 1, the distal end portion of the cylindrical body 41 that is in contact with the adapter 8 Using the (inclined inner wall) 42 as a fulcrum, the nozzle 1 can be extracted or extracted smoothly and reliably without damaging the groove portion 5 of the nozzle 1. In particular, since a chucking operation and an extraction operation are possible along the central axis of the nozzle 1, the nozzle 1 can be easily extracted from the adapter 8 even in the small work space.

  Further, since the groove portion 5 of the nozzle 1 is chucked over the entire circumference by the plurality of claw members 31, the extracted nozzle 1 is not dropped during the extraction operation of the nozzle 1. Further, after the extraction operation of the nozzle 1 is completed, the operation string 45 is pulled, so that the nozzle 1 is detached from the claw portion 32 (disengaged), and is released from the opening in front of the cylindrical body 41. The nozzle 1 can be collected. Further, when the backward movement of the cylinder body 22 is stopped to be free, the cylinder body 22 can be moved forward by the urging force of the urging member (coiled spring) 43 and stopped at a predetermined position. Therefore, the nozzle 1 can be repeatedly extracted by simple operations such as chucking accompanying the forward movement of the extraction device, the backward movement of the cylinder 21 and the release of the operation of the cylinder 21.

  The chucking member may be formed of a plurality of claw members that can be locked to a groove or step that extends in the circumferential direction of the nozzle (usually a groove or step formed near the tip of the nozzle). The plurality of claw members are usually arranged adjacent to each other in the circumferential direction. The plurality of claw members may be arranged at a predetermined interval in the circumferential direction. These claw members only need to have a claw portion that can be locked or engaged with the groove portion or the step portion, and the shape of the claw portion is a cross-sectional shape depending on the shape of the groove portion or the step portion. Further, it may be in the form of an L-shaped cross section.

  Since the plurality of claw members are normally chucked in the groove portion or step portion of the descaling nozzle from the entire circumference, they can be opened and closed in the radial direction with respect to the central axis. The plurality of claw members are adjacent to the peripheral edge of the tip of the cylinder (such as the holding member or the support member) in the circumferential direction, and the opening / closing operation unit is hinged with a hinge member or a pivot member (ring-shaped member) It may be connected in a pivotal manner with a pin such as a pin and can be opened and closed in the radial direction.

  The chucking member may be formed of a plurality of claw members, for example, 2 to 10 (for example, 3 to 8), preferably 3 to 6 (particularly 4 to 6). .

  It is advantageous to form a taper portion (taper guide portion) for opening the tip portion of the claw member in the radial direction as the nozzle moves forward on the inner wall of the tip portion of the claw member. The taper portion (taper guide portion) may be inclined in a straight line shape or curved shape (inflated or concaved) as it goes in the direction of the distal end portion of the claw member. The inclination angle θ of the tapered guide portion may be about 10 to 80 ° (for example, 20 to 70 °), preferably about 25 to 60 ° (for example, 30 to 45 °) with respect to the central axis.

  On the other hand, a closing member (or an elastic closing member) may be disposed on the claw member in order to close the plurality of opened claw members. For example, an elastic ring member (such as a rubber member such as a rubber string or a rubber band) for elastically fastening or binding a plurality of claw members may be provided on the outer peripheral wall of the claw member. In a preferred embodiment, an accommodation groove that can accommodate a ring member is usually formed on the outer periphery of the claw member, and an elastic ring member is disposed in the accommodation groove. When such a closing member is provided, the front end of the claw member is closed in the radial direction as the nozzle moves forward with respect to the groove or step, and the plurality of claw members are all closed with respect to the nozzle groove or step. Engage over the circumference.

  An opening / closing operation part for opening a plurality of claw members in the radial direction may be formed at an end of the claw member opposite to the claw part. It has a shape that narrows as it goes, and is usually formed in a triangular shape or a U-shape.

  Further, the inner wall of the opening / closing operation portion of the opposing claw member does not need to be inclined, but in order to open and close smoothly, the inner wall of the opening / closing operation portion is inclined at an angle of about taper θ1 = 20 to 40 ° (for example, 25 to 35 °). There are many cases. In addition, the end wall of the opening / closing operation part of the adjacent claw member does not need to be inclined, but usually an angle larger than the taper θ1, for example, taper θ2 = 40 to 80 ° (for example, 45 to 70 °). ) It may be inclined at an angle of about. In addition, you may form taper (theta) 1 and taper (theta) 2 by the multiple relation about 1.5 to 2.5 times, for example. The taper θ1 and θ2 may be adjusted according to the number of claw members, and the taper θ1 and θ2 may be reduced as the number of claw members increases. For example, when the chucking member is formed by six claw members, the taper θ1 = 15 to 25 ° (for example, 20 °) and the taper θ2 = 35 to 45 ° (for example, 40 °) may be used. When the chucking member is formed by the claw member, the taper θ1 = 25 to 35 ° (for example, 30 °) and the taper θ2 = 55 to 65 ° (for example, 60 °) may be used. When forming the king member, the taper θ1 = 35 to 45 ° (for example, 40 °) and the taper θ2 = 75 to 85 ° (for example, 80 °) may be formed.

  Furthermore, in order to open the plurality of closed claw members, the extraction device may be provided with an opening / closing operation mechanism, and this opening / closing operation mechanism contracts or expands the plurality of claw members on the rear end side of the claw member. (Or open) may be possible. The opening / closing operation mechanism is formed, for example, in the circumferential direction of the opening / closing operation part of the claw member, and a bridge part (or a through-hole through which the operation string can be bridged) and both ends of the bridged operation string. There may be provided an insertion hole for converging the part and taking it out from the cylinder. For example, an accommodation groove is formed in the outer circumferential wall of the claw member in the circumferential direction, through holes are formed from both ends of the groove to both end surfaces of the claw member, and a plurality of claw members are arranged adjacent to each other in the circumferential direction. In the installed state, the operation string is sequentially accommodated in the accommodation groove, the operation string is passed through the through hole, and the opening / closing operation mechanism is formed by pulling out both ends of the operation string from the insertion hole extending in the radial direction of the cylindrical body. Also good. Note that the bridging portion only needs to be able to suppress the dropping of the operation string, and may be formed by a groove portion, a locking portion, a through-hole or a ring portion that can be inserted, or the like. Further, as described above, both end portions of the operation string may be pulled out from the insertion hole of the cylindrical body through the insertion hole of the holding member. In the planar shape, the operation cord in such a form is stretched around a plurality of claw members in a circular arc shape (loop shape), and both side portions are drawn out between adjacent claw members on the opposite side from the bridging terminal portion. (E.g., a j-shape). In addition, the both ends of the operating string may be usually bound or converged so as not to be detached by the converging member. As the operation string, usually a narrow rope or the like can be used.

  By using such an operation string, it is possible to release a plurality of claw members (tip portions of the claw members) in the radial direction by towing, and release the locking with respect to the groove portion or the step portion of the nozzle. That is, by pulling the string member, chucking by the plurality of claw members can be simultaneously released in the entire circumferential direction. In addition, by releasing the pull of the operation string, the opening / closing operation part may be opened by using the contraction force of the elastic ring member, and the plurality of claw members may be closed. It may be openable and closable.

  In order to extract or extract the nozzle from the adapter, the chucking member only needs to be at least retractable relative to the cylindrical body by the drive unit while being locked in the groove or step of the nozzle. . That is, the chucking member may be moved backward, and the cylinder may be moved forward. Usually, the drive unit often moves at least the chucking member (or cylinder body) backward. The drive unit only needs to be able to move a plurality of claw members directly or indirectly, and is usually capable of driving at least a cylinder body and is usually constituted by a hydraulic cylinder (or cylinder body). Good. The drive unit may be capable of moving back and forth (forward movement and backward movement) with a predetermined stroke. For example, the forward movement of the cylinder body may be decelerated when the plurality of claw members reach the chucking position (when reaching the stroke end) using the cylinder cushion. In a preferred embodiment, the drive unit can at least move the cylinder body backward.

  The cylinder that can be moved backward by the drive unit does not need to include the cylinder body, the urging pressing member, and the holding member, and a plurality of claw members may be attached to the outer periphery of the cylinder body or the urging pressing member. . In a preferred embodiment, in order to advance the cylinder body moved backward to a predetermined extraction position to a predetermined position, a biasing pressing member capable of moving the cylinder body forward by the biasing force of the biasing member and a plurality of peripheral or outer peripheral portions are provided. And a holding member to which the claw member can be attached. Further, the urging pressing member has an action part (for example, an attaching part of the urging member) for applying the urging force of the urging member.

  In order to reduce the size and weight of the cylindrical body, it is preferable that the cylindrical body can accommodate a chucking member in a normal state. That is, the chucking member can advance and retract within the cylinder. The cylinder includes a tip portion that can contact the adapter. The tip of the cylindrical body may be capable of point contact (for example, regular or irregular surface contact in the circumferential direction) or line contact (for example, line contact in the circumferential direction) with respect to the adapter. In order to apply a strong force, it is preferable that surface contact is possible. Therefore, the front-end | tip part of a cylinder may have the inclination inner wall which expands and inclines in a side part direction as it goes ahead corresponding to the shape of an adapter.

  Further, the cylindrical body can accommodate a biasing member for biasing the biasing pressing member in the forward direction. This urging member can typically be formed by a coil spring or the like.

  Furthermore, in order for the cylinder to exert a traction force on the chucking member, the chucking member can be accommodated in such a manner that the chucking member can be moved forward and backward while the tip is in contact with the adapter (or at least in the extraction operation or the extraction operation). Good.

  The length of the cylinder may be variable by using a hollow cylindrical spacer cylinder that can be attached to the tip of the cylinder. FIG. 12 is a schematic view showing still another example of the extraction device of the present invention.

  In this example, the cylindrical body 51 includes a cylindrical main body 52 corresponding to the cylindrical body 41, and a hollow cylindrical spacer cylindrical body 53 that can be attached to the distal end portion of the cylindrical main body. The spacer cylinder includes a threaded portion that can be screwed to the cylindrical body 52, a contact wall 54 that extends forward from the screwed portion, and whose inner wall at the front end can be in surface contact or line contact with the adapter 8. It has. By mounting such a spacer cylinder 53 on the cylinder body 52, the apparent stroke length can be increased by a length corresponding to the spacer cylinder 53. Therefore, even when the nozzle does not come out even when the chucking member is pulled with a predetermined stroke length, the nozzle can be reliably extracted by using the spacer cylinder 53.

  The spacer cylinder is not limited to a single one, and may be composed of a plurality of spacer cylinders. Further, the mounting of the spacer cylinders to the cylinder body and the mounting of the spacer cylinders to each other are not limited to the screwed structure, but may be a fitting or fitting structure, a sliding structure in the axial direction, or the like. The length of the spacer cylinder is not particularly limited, and may be, for example, about 10 to 100 mm (for example, 20 to 80 mm) or about 25 to 75 mm (for example, 30 to 50 mm).

  In the method of the present invention, the tip of the cylinder that can accommodate the chucking member is brought into contact with the adapter, and the chucking member is locked to the groove or step extending in the circumferential direction of the nozzle mounted on the adapter. (Or mating) and in a state of being locked in the groove or step of the nozzle, the chucking member is moved backward relative to the cylinder by the drive unit by the drive unit, And a step of extracting the nozzle. In the locking step, the contact of the tip of the cylindrical body to the adapter and the locking (chucking) by the chucking member may be performed simultaneously or sequentially, and the chucking member may be a groove portion or a step portion of the nozzle. The cylinder may be brought into contact with the adapter by moving the chucking member backward with the drive unit, and the tip of the cylinder is in contact with the adapter. The chucking member may be moved forward in the cylinder and locked (chucked) by the chucking member. Further, in the extraction step, the chucking member may be moved relative to the cylinder, and the cylinder may be moved forward with the tip of the cylinder being in contact with the adapter. . In the preferred embodiment, the chucking member is often moved backward. Furthermore, the extraction step may include a step of detaching the nozzle extracted from the adapter and chucked by the chucking member by pulling or releasing the pull by the operation string.

  The present invention is not limited to the nozzle mounted on the adapter, but can be applied to nozzles mounted on various mounted parts and having grooves and steps. The groove part or the step part only needs to extend in the circumferential direction, and may be a plurality of groove parts (concave parts) or protruding step parts formed at intervals in the circumferential direction, or a single groove part (or concave part) or convex part. Part. A preferred groove or step is a continuous annular groove or step. The type of nozzle is not particularly limited, and is a one-fluid nozzle (a nozzle that sprays or jets a gas such as air or a liquid such as water), a two-fluid nozzle (a mixed fluid of a gas such as air and a liquid such as water) Any of the nozzles which spray or inject. The present invention is useful for extracting a descaling nozzle used for removing scale on a hot-rolled steel sheet from an adapter.

DESCRIPTION OF SYMBOLS 1 ... Nozzle 5 ... Groove part 7 ... Cap 8 ... Adapter 21 ... Cylinder 22 ... Cylinder main body 23 ... Energizing pressing member 26 ... Holding member (support member)
DESCRIPTION OF SYMBOLS 27 ... Insertion hole 31 ... Claw member 32 ... Claw part 33 ... Taper guide part 35 ... Opening / closing operation part 36 ... Taper part 37 ... Accommodating groove part 38 ... Through-hole 39 ... Groove part 40 ... Elastic ring member 41 ... Cylindrical body 43 ... Biasing Member (coiled spring)
45 ... operation string

Claims (10)

  A device for extracting a nozzle attached to an adapter, the chucking member being lockable with respect to a groove portion or a step portion extending in the circumferential direction of the nozzle, and the chucking member can be accommodated. A cylinder that can contact the adapter; and a drive unit that moves the chucking member backward relative to the cylinder in the cylinder. An extraction device comprising a plurality of claw members arranged adjacent to each other and capable of being locked with the groove or step.   The extraction device according to claim 1, wherein the plurality of claw members can be opened and closed in a radial direction with respect to the central axis.   3. The extraction device according to claim 1 or 2, further comprising a string member capable of releasing a plurality of claw members in a radial direction by pulling and releasing a lock on a groove portion or a step portion of the nozzle.   A plurality of claw members having a shape that narrows toward the drive unit side in the axial direction, and an opening / closing operation part for opening the claw member in the radial direction; formed in a circumferential direction of these opening / closing operation parts; A bridging portion on which the operation string can be bridged; formed extending in the radial direction of the cylindrical body, and in a state where a plurality of claw members are arranged adjacent to each other in the circumferential direction, And a through hole through which both ends of the converged operation cord can be inserted, and the plurality of claw members can be opened by converging the open / close operation portion by pulling the both ends of the converged operation cord. The extraction device according to any one of the above.   A taper portion is formed on the inner wall of the tip of the claw member to open the tip of the claw member in the radial direction as the nozzle moves forward, and the tip of the claw member moves forward with respect to the groove or step of the nozzle. The extraction device according to claim 1, further comprising an elastic member for closing the portion in the radial direction.   The inner wall of the opening / closing operation part of the opposing claw member is inclined at an angle of taper θ1 = 20-40 °, and the end wall of the opening / closing operation part of the adjacent claw member is inclined at an angle of taper θ2 = 40-80 °. The extraction device according to any one of claims 1 to 5.   The extraction device according to any one of claims 1 to 6, wherein the chucking member is movable back and forth in the cylinder.   A plurality of claw members, which are supported at the front end portion of the cylinder that can move forward and backward, and whose front end portion and rear end portion can be opened and closed in the radial direction and are arranged adjacent to each other in the circumferential direction; A claw formed on the inner wall of the tip of the member and engageable with the groove or step of the nozzle; formed on the inner wall on the tip of the side of the claw of the plurality of claw members, along with the forward movement with respect to the nozzle A taper portion for opening the tip portions of the plurality of claw members in the radial direction; a groove portion formed in the circumferential direction between the tip portion and the support portion of each claw member; An elastic member for closing the front end portion of the claw member in the radial direction; a through hole formed in the circumferential direction at the rear end portion of the claw member; A hollow cylindrical cylinder that can be contacted; formed through the cylinder corresponding to the through hole A plurality of claw members disposed adjacent to each other in the circumferential direction, and can be passed through the through-holes across the circumferential direction of the plurality of claw members, and both ends of the insertion holes The extraction device according to claim 1, further comprising an operation string that can be inserted in a state where the portion is converged.   Furthermore, the extraction apparatus in any one of Claims 1-8 provided with the hollow cylindrical spacer cylinder which can be mounted | worn at the front-end | tip part of a cylinder, and can contact an adapter.   The tip of the cylinder that can accommodate the chucking member is brought into contact with the adapter on which the nozzle is mounted, and the chucking member is locked to the groove or step extending in the circumferential direction of the nozzle mounted on the adapter. In this state, the chucking member is moved backward relative to the cylindrical body by the drive unit at least relative to the cylindrical body, and the nozzle is extracted from the adapter. A method for extracting a nozzle, comprising a plurality of claw members disposed adjacent to each other in the circumferential direction and engageable with the groove or step.

Images