JP2019013938A - Sliding gate device - Google Patents

Abstract

To provide a sliding gate device capable of positively avoiding a face-pressure load release during opening-and-closing control of a nozzle hole while realizing nozzle-hole opening-and-closing control and face-pressure load release control of an insert nozzle in a state of face-pressure load between a fixed plate and a slide plate by sliding due to a same slide device.SOLUTION: A sliding gate device comprises a fixed plate that is fixed to a molten steel vessel, a slide plate that is slidably moved with respect to the fixed plate, a slide device that causes a slider case detachably holding the slide plate to slide, and a face-pressure load release mechanism that loads a face pressure between the fixed plate and the slide plate within an ordinary slide range and releases the face-pressure load at an outside of the ordinary slide range. The face-pressure load release mechanism has a releasing jig that is detachably attached to the slide device, a cam lever that rotates due to the releasing jig, a plate member, and a spring member.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a sliding gate device capable of switching between a state in which a surface pressure is applied between a fixed plate and a slide plate and a state in which the surface pressure load is released.

  2. Description of the Related Art Conventionally, a sliding gate device provided at a hot water outlet on the bottom surface of a molten steel container is known (for example, see Patent Document 1). The sliding gate device includes a fixed plate and a slide plate. Each of the fixed plate and the slide plate is provided with a through hole through which the molten steel in the molten steel container flows. In the above sliding gate device, the surface pressure is applied between the fixed plate and the slide plate, and the two plates are relatively moved by the sliding movement of the slide plate by the cylinder as the slide device. It is possible to switch between communication and non-communication. When the communication between the through holes is switched to the non-communication, the nozzle hole of the insert nozzle inserted into the outlet of the molten steel container is opened and closed. Thereby, the molten steel flow rate from a molten steel container is controlled.

  Said sliding gate apparatus is provided with the surface pressure load cancellation | release mechanism. The surface pressure load release mechanism applies a surface pressure by the spring between the fixed plate and the slide plate and releases the surface pressure load by advancing and retracting the surface pressure bar that receives the surface pressure by the spring with a cylinder. Is possible. Specifically, this surface pressure load release mechanism is used to prevent leakage of molten steel from both plates during the control of the molten steel flow rate in the sliding gate device. Apply surface pressure. When exchanging plates, the surface pressure bar is moved forward by the cylinder to release the surface pressure load between the plates.

  In the above sliding gate device, when the surface pressure bar is retracted by the cylinder, the engaging portion of the surface pressure bar engages with a roller provided in a spring case with a built-in spring, so that the surface pressure by the spring is increased. Is loaded between the stationary plate and the slide plate. When the surface pressure bar is advanced by the cylinder, the engagement between the engaging portion of the surface pressure bar and the roller of the spring case is released, so that the load of the surface pressure by the spring is released.

JP 2011-212702 A

  As described above, in the sliding gate device in which the surface pressure bar is advanced and retracted by the cylinder for opening and closing the nozzle hole of the insert nozzle and the surface pressure bar is advanced by the cylinder for replacing the plate, the nozzle hole of the insert nozzle is It is necessary to prevent a situation in which the surface pressure load is released during the opening / closing control. If this configuration is not applied, when the contact pressure bar is unintentionally advanced during the opening / closing control of the nozzle hole of the insert nozzle, the engagement between the contact portion of the contact pressure bar and the roller of the spring case is released. During the opening / closing control of the nozzle hole of the insert nozzle, the surface pressure load due to the spring between the fixed plate and the slide plate may be erroneously released.

  The present invention has been made to solve the above-described problems, and is designed to open and close the nozzle hole of an insert nozzle and release the surface pressure load when a surface pressure is applied between the fixed plate and the slide plate. To provide a sliding gate device capable of reliably avoiding the release of the surface pressure load during opening / closing control of the nozzle hole of the insert nozzle while realizing the control by sliding movement by the same sliding device. Objective.

  The present invention provides a fixed plate having a fixed through hole that is fixed to a molten steel container and communicates with a nozzle hole of an insert nozzle that pours molten steel in the molten steel container, and a slide side that can communicate with the fixed side through hole. It has a through hole, is slidably slidable with respect to the fixed plate, and opens and closes the nozzle hole by switching between communication and non-communication of the slide side through hole with respect to the fixed side through hole by sliding movement. A slide device for slidingly moving a slide plate, a slider case for detachably holding the slide plate, and a surface between the fixed plate and the slide plate when the slide plate is positioned within a normal slide range. While applying pressure, the slide plate is located beyond the normal slide range A surface pressure load release mechanism that releases the load of the surface pressure when the surface pressure load release mechanism is attached to the slide device in a detachable manner, and rotates toward the molten steel container. A cam lever that is attached to the release device attached to the slide device and that rotates when one end is pushed and pulled, and is connected to the other end of the cam lever and moves as the cam lever rotates. A sliding gate device comprising: a plate member that performs expansion and contraction according to movement of the plate member, and a spring member that can generate a force for applying the surface pressure between the fixed plate and the slide plate. .

  According to this configuration, the slider case that detachably holds the slide plate is slid by the slide device. When the slide plate is normally positioned within the slide range, a surface pressure is applied between the fixed plate and the slide plate. On the other hand, when the slide plate is positioned beyond the normal slide range, the surface pressure load is released. To release this surface pressure load, a release lever that can be attached to and detached from the slide device is attached to the slide device, and one end of the cam lever attached to the molten steel container is pushed and pulled into the release jig. Thus, the rotation is performed, the plate member connected to the other end of the cam lever moves, and the spring member expands or contracts. Therefore, the opening / closing control of the nozzle hole of the insert nozzle and the release control of the surface pressure load can be realized with a simple configuration by sliding movement by the same sliding device. Further, the release of the surface pressure load is realized in a state where the release jig is attached to the slide device, while it is not realized in a state where the release jig is not attached to the slide device. Therefore, the release jig is removed during the opening / closing control of the nozzle hole of the insert nozzle that is normally performed within the slide range, thereby reliably avoiding the release of the surface pressure load during the opening / closing control. be able to.

  In the above-described sliding gate device, the release jig is detachably interposed between a lever pushing member that pushes and pulls one end of the cam lever, and the lever pushing member and the slide device. It is preferable to have a fixing attachment member for fixing the lever push / pull member to the slide device.

  According to this configuration, the lever push / pull member is fixed to the slide device by mounting the fixing attachment member. Therefore, when the slide device slides the slider case, the lever push / pull member rotates the cam lever. In this case, since the spring member expands and contracts according to the movement of the plate member, it is possible to switch between the surface pressure load between the fixed plate and the slide plate and the release of the surface pressure load. In addition, since the fixing of the lever push / pull member and the slide device is released when the fixing attachment member is not mounted, the lever push / pull member does not rotate the cam lever even if the slide device slides the slider case. In this case, since the plate member does not move and the spring member does not expand and contract, the surface pressure load between the fixed plate and the slide plate is maintained.

  In the above-described sliding gate device, the plate member has a cam portion that expands and contracts the spring member, and the surface pressure load release mechanism is connected to one end of the spring member, and the plate member is moved according to the movement of the plate member. It is preferable to have an engaging portion that engages with the cam portion.

  According to this configuration, the spring member can be expanded and contracted depending on whether the cam portion of the plate member and the engaging portion of the surface pressure load releasing mechanism are engaged, and the surface pressure load between the fixed plate and the slide plate can be reduced. The release of the surface pressure load can be switched.

  In the above-described sliding gate device, it is preferable that the cam portion is replaceable with respect to the main body of the plate member. According to this configuration, it is not necessary to replace the entire plate member when the cam portion is consumed, and only the cam portion can be replaced.

The pouring position A (the figure (A)) which shows the structure of the sliding gate apparatus which concerns on one Embodiment of this invention, the pouring stop position B (the figure (B)), and the surface pressure release position C (the figure ( It is each arrangement | positioning figure in C)). It is an exploded view of the principal part of the surface pressure load cancellation | release mechanism with which the sliding gate apparatus which concerns on this embodiment is provided. It is a perspective view showing the state at the time of the surface pressure load of the surface pressure load cancellation | release mechanism of this embodiment. It is a side view showing the state at the time of surface pressure load of the surface pressure load release mechanism of this embodiment (a spring part is a sectional view). It is a top view showing the state at the time of the surface pressure load of the surface pressure load cancellation | release mechanism of this embodiment. It is VI-VI sectional drawing of the surface pressure load cancellation | release mechanism shown in FIG. It is a perspective view showing the state at the time of surface pressure cancellation | release of the surface pressure load cancellation | release mechanism of this embodiment. It is a side view showing the state at the time of surface pressure release of the surface pressure load release mechanism of this embodiment (a spring part is a sectional view). It is a top view showing the state at the time of surface pressure cancellation | release of the surface pressure load cancellation | release mechanism of this embodiment. It is XX sectional drawing of the surface pressure load cancellation | release mechanism shown in FIG. It is a one part perspective view of the cancellation | release jig | tool which the surface pressure load cancellation | release mechanism of this embodiment has. It is a figure for demonstrating attachment or detachment of the jig | tool for cancellation | release of this embodiment. It is an expanded side view of the principal part showing the state at the time of the surface pressure load of the surface pressure load cancellation | release mechanism of this embodiment. It is an expanded side view of the principal part showing the state at the time of surface pressure cancellation | release of the surface pressure load cancellation | release mechanism of this embodiment.

  Hereinafter, specific embodiments of the sliding gate device of the present invention will be described with reference to the drawings.

  The sliding gate apparatus 1 which concerns on this embodiment is an apparatus attached to molten steel containers 2, such as a ladle and a tundish, as shown in FIG. The molten steel container 2 is a container made of, for example, an iron plate in which molten steel that is a high-temperature molten metal for casting is accommodated. On the inner side of the molten steel container 2, a goodwill as a refractory material is disposed.

  A through hole 2 a is provided at the bottom of the molten steel container 2. An insert nozzle 4 is attached and fixed to the bottom of the molten steel container 2 so as to penetrate the through hole 2a. The insert nozzle 4 has a nozzle hole 4a that passes therethrough. The insert nozzle 4 is a pouring nozzle for flowing and pouring molten steel accommodated in the molten steel container 2 through the nozzle hole 4a. The insert nozzle 4 is a member that is made of a material having high fire resistance (for example, alumina, carbon, etc.) that enables continuous casting.

  The sliding gate device 1 is provided corresponding to the insert nozzle 4. The sliding gate device 1 includes a fixed plate 10 and a slide plate 11. The sliding gate device 1 includes a fixed plate 10 that communicates with the nozzle hole 4 a of the insert nozzle 4 by controlling the communication and non-communication between the through holes by sliding the slide plate 11 with respect to the fixed plate 10. It is an apparatus which controls the outflow of the molten steel from the insert nozzle 4 by opening and closing the through-hole 10a.

  Each of the fixed plate 10 and the slide plate 11 is a brick member formed in a plate shape. The fixed plate 10 and the slide plate 11 are arranged so as to overlap each other. Specifically, the fixed plate 10 is disposed on the bottom side of the molten steel container 2, and the slide plate 11 is disposed adjacent to and below the fixed plate 10. The slide plate 11 is slidable in a predetermined direction X (hereinafter referred to as a slide direction X) while sliding along the facing surface with respect to the fixed plate 10. When the slide plate 11 slides in the sliding direction X, the through hole 10a of the fixed plate 10 is opened and closed, and the nozzle hole 4a of the insert nozzle 4 is opened and closed.

  The fixed plate 10 is a plate that is fixed to the molten steel container 2 via the mounting plate 20. The fixed plate 10 is detachably attached to the mounting plate 20 and thus the molten steel container 2. The fixed plate 10 has a through hole 10a through which molten steel flows. The through hole 10a is provided for pouring molten steel accommodated in the molten steel container 2 into an external mold or the like. The through hole 10 a has an inner diameter that is substantially the same as the inner diameter of the nozzle hole 4 a of the insert nozzle 4. The fixing plate 10 is fixed to the molten steel container 2 side so that a positional relationship in which the through hole 10a communicates with the nozzle hole 4a of the insert nozzle 4 is established. Note that the fixed plate 10 may be one in which a cushion material or a tin plate as a cushioning material is attached to a contact surface with the mounting plate 20.

  The slide plate 11 is a plate that is slidable with respect to the fixed plate 10 and consequently the molten steel container 2. The slide plate 11 is detachably attached to the slide device 30. The slide plate 11 has a through hole 11a through which molten steel flows. The through hole 11a is provided for pouring molten steel accommodated in the molten steel container 2 into an external mold or the like. The through hole 11 a has an inner diameter that is substantially the same as the inner diameter of the nozzle hole 4 a of the insert nozzle 4 and the through hole 10 a of the fixed plate 10.

  The slide device 30 is a device that slides the slide plate 11 with respect to the fixed plate 10 and thus the molten steel container 2. The slide device 30 performs a sliding movement of the slide plate 11 using a drive source such as a hydraulic cylinder or a motor. The slide movement by the slide device 30 is performed linearly in the slide direction X while the slide plate 11 slides along the opposing surface of the fixed plate 10.

  As shown in FIG. 1A, the slide device 30 has a position (hereinafter referred to as a pouring position A) where the through hole 11a communicates with the through hole 10a of the fixed plate 10, as shown in FIG. As shown in B), the through-hole 11a can be slid between a position where the through-hole 11a does not communicate with the through-hole 10a (hereinafter referred to as a pouring stop position B). Hereinafter, the space between the pouring position A and the pouring stop position B including the pouring position A and the pouring stop position B is appropriately referred to as a normal slide range.

  A pouring nozzle 5 is attached and fixed to the slide plate 11. The pouring nozzle 5 is disposed on the back side of the slide plate 11 opposite to the facing side facing the fixed plate 10. The pouring nozzle 5 is a member that is made of a material having high fire resistance (for example, alumina, carbon, etc.) and enables continuous casting.

  The pouring nozzle 5 has a nozzle hole 5a through which molten steel flows. The nozzle hole 5 a has an inner diameter that is substantially the same as the inner diameter of the nozzle hole 4 a of the insert nozzle 4. The pouring nozzle 5 is fixed to the slide plate 11 so that the positional relationship in which the nozzle hole 5a communicates with the through hole 11a of the slide plate 11 is established.

  Next, the normal operation | movement for performing the pouring control in the sliding gate apparatus 1 of this embodiment is demonstrated.

  When casting is required by causing the molten steel to flow out from the molten steel container 2 in which the molten steel is accommodated, the slide device 30 slides the slide plate 11 to the pouring position A. At the pouring position A, the through hole 11 a of the slide plate 11 is communicated with the nozzle hole 4 a of the insert nozzle 4 inserted into the through hole 2 a of the molten steel container 2 and the through hole 10 a of the fixed plate 10. In this case, since the nozzle hole 4a is opened, the molten steel accommodated in the molten steel container 2 flows from the nozzle hole 4a of the insert nozzle 4 to the through hole 10a of the fixed plate 10, the through hole 11a of the slide plate 11, and the pouring nozzle 5. Then, it is poured out through the nozzle hole 5a and poured. Therefore, the slide device 30 allows the through hole 11a of the slide plate 11 to communicate with the through hole 10a of the fixed plate 10 and then the nozzle hole 4a of the insert nozzle 4, thereby causing the molten steel in the molten steel container 2 to flow out and realizing casting. Can do.

  When the above-described casting stop is requested, the slide device 30 slides the slide plate 11 from the pouring position A to the pouring stop position B. When the slide plate 11 is located at the pouring stop position B, the through hole 11 a of the slide plate 11 is not communicated with the through hole 10 a of the fixed plate 10. In this case, since the nozzle hole 4a of the insert nozzle 4 is closed, the outflow of the molten steel accommodated in the molten steel container 2 is stopped and the above casting is stopped.

  Next, with reference to FIGS. 2 to 14, a surface pressure load releasing mechanism provided in the sliding gate device 1 of the present embodiment will be described.

  The sliding gate device 1 of this embodiment includes a surface pressure load releasing mechanism 40. The surface pressure load releasing mechanism 40 is a mechanism for applying a surface pressure between the fixed plate 10 and the slide plate 11 and releasing the surface pressure load. The surface pressure load release mechanism 40 applies a surface pressure between the fixed plate 10 and the slide plate 11 during the normal operation of the sliding gate device 1, that is, when the slide plate 11 is positioned within the normal slide range. To load. The magnitude of the surface pressure applied between the plates 10 and 11 is set so as to allow relative movement of the slide plate 11 with respect to the fixed plate 10 while preventing molten steel leakage between the plates 10 and 11. Yes.

  The slide device 30 can slide the slide plate 11 beyond the normal slide range. The surface pressure load release mechanism 40 can release the surface pressure load when the slide plate 11 is slid and moved by the slide device 30 beyond the normal slide range. Hereinafter, the position where the surface pressure load outside the normal slide range is released is referred to as a surface pressure release position C. The surface pressure release position C is set to a position opposite to the pouring position A across the pouring stop position B as shown in FIG.

  The mounting plate 20 is formed in a plate shape and is fixed to the molten steel container 2. The mounting plate 20 may be attached to the molten steel container 2 using bolts or brackets. As shown in FIG. 2, the mounting plate 20 is provided with a recess 21 for accommodating the fixed plate 10. The mounting plate 20 holds the fixed plate 10 in a state where it is accommodated in the recess 21. The fixed plate 10 is detachably held in the recess 21.

  As shown in FIGS. 3, 5, 7, and 9, the slide device 30 includes a slider case 31 that detachably holds the slide plate 11. The slider case 31 is formed in a box shape. The slider case 31 is provided with a recess 32 for accommodating the slide plate 11. The slider case 31 holds the slide plate 11 in a state where the slide plate 11 is accommodated in the recess 32. The slide plate 11 is detachably held in the recess 32.

  The slider case 31 is held on the bottom plate 50 so as to be slidable in the sliding direction X. The slider case 31 is connected to a drive source (not shown) via a cylinder joint 33. The cylinder joint 33 is a rectangular bar-like member that extends in the sliding direction X. Further, this drive source can reciprocate the slider case 31 in the slide direction X via the cylinder joint 33. The slide device 30 slides in the slide direction X while sliding the slide plate 11 held in the slider case 31 with respect to the fixed plate 10 by moving the slider case 31 in the slide direction X on the bottom plate 50. Move.

  The bottom plate 50 is formed in a substantially plate shape or frame shape. The bottom plate 50 is rotatably supported by the mounting plate 20. The bottom plate 50 is rotatable about one side as a rotation center. The bottom plate 50 is rotated with respect to the mounting plate 20 around the hinge pin 51. The hinge pin 51 extends in a direction perpendicular to the sliding direction X and parallel to the plate surface of the mounting plate 20 (hereinafter referred to as the width direction Y). The bottom plate 50 is rotated between a state in which the bottom plate 50 is maintained parallel to the mounting plate 20 (so-called closed state) and a state in which the bottom plate 50 is maintained substantially vertical (so-called open state). It may be performed at. When the bottom plate 50 is in the closed state, the slide plate 11 cannot be removed from the slider case 31, and when the bottom plate 50 is in the open state, the slide plate 11 can be removed from the slider case 31. .

  The surface pressure load release mechanism 40 can apply a surface pressure between the fixed plate 10 and the slide plate 11 by pressing the slider case 31 toward the mounting plate 20 via the bottom plate 50. The surface pressure load releasing mechanism 40 includes a cam lever 41, a cam plate 42, a first roller 43, a spring 44, and a second roller 45. The cam lever 41, the cam plate 42, the first roller 43, the spring 44, and the second roller 45 are provided on both sides in the width direction Y orthogonal to the slide direction X in which the slider case 31 is slid and moved. They are provided symmetrically in the direction Y.

  The cam lever 41 is a member that is rotatably supported by the bottom plate 50 and extends in an arm shape in a direction orthogonal to both the sliding direction X and the width direction Y (hereinafter referred to as the vertical direction Z). The cam lever 41 is rotated around a support shaft extending in the width direction Y. The cam lever 41 has a first arm portion 41a extending upward and a second arm portion 41b extending downward with the rotation center interposed therebetween.

  The cam plate 42 is a band-shaped member extending in the sliding direction X. The cam plate 42 is disposed on the side surface in the width direction Y of the bottom plate 50. The cam plate 42 is connected to the distal end portion of the first arm portion 41 a of the cam lever 41. The cam plate 42 and the cam lever 41 are connected so that the cam lever 41 can move in the vertical direction Z with respect to the cam plate 42. The cam plate 42 moves in the slide direction X as the cam lever 41 rotates.

  The first roller 43 is rotatably supported by the bottom plate 50. Two pairs of the first rollers 43 are provided on both sides in the width direction Y of the bottom plate 50 so as to be separated in the vertical direction Z by the thickness of the cam plate 42, and the two pairs are arranged in the slide direction X. Two pairs are provided so as to be spaced apart by a predetermined distance. The rotation of the first roller 43 is performed around a support shaft extending in the width direction Y with respect to the side surface of the bottom plate 50. The cam plate 42 is inserted between a pair of first rollers 43 arranged apart in the vertical direction Z and inserted into each of two pairs of first rollers 43 arranged apart in the sliding direction X. The first roller 43 is supported so as to be movable in the slide direction X.

  The cam plate 42 has a plate body portion 42a and a cam portion 42b. The plate main body 42a is a band-shaped member extending in the sliding direction X and is formed in a rectangular cross section. The cam portion 42b is a block-like member that can be brought into contact with and engaged with a second roller 45 that will be described in detail later, and that changes a spring force generated in the spring 44.

  The cam portion 42b is attached and fixed to the side surface of the plate main body portion 42a. Two cam portions 42 b are provided on both sides of the bottom plate 50 in the width direction Y, separated in the slide direction X. The cam portion 42b is formed in a wedge shape. The cam portion 42 b includes a horizontal plane 42 b-1 that is parallel to the slide direction X and an inclined surface 42 b-2 that is inclined in the vertical direction Z with respect to the slide direction X. The horizontal surface 42b-1 and the inclined surface 42b-2 are formed so as to be continuous in the sliding direction X. The cam portion 42b is detachable and replaceable with respect to the plate body portion 42a. The cam portion 42b may be attached to the plate main body portion 42a using, for example, a bolt.

  The spring 44 is a spring member (elastic body) that can generate a spring force for applying a surface pressure between the fixed plate 10 and the slide plate 11. The spring 44 generates a spring force in the vertical direction Z. As shown in FIGS. 4, 6, 8, and 10, the spring 44 is accommodated in a spring box 46. The spring box 46 is formed in a box shape so that a plurality of springs 44 can be accommodated in parallel. A plurality of the springs 44 are arranged in parallel in the spring box 46 and can generate a desired spring force.

  The spring box 46 has a fixed portion 46 a to which one end of the spring 44 is fixed, and a plate-like movable portion 46 b to which the other end of the spring 44 is fixed. The fixing part 46 a is a part fixed to the mounting plate 20 or integrally formed with the mounting plate 20. The movable part 46b is a member that can be displaced in the vertical direction Z in which the spring 44 expands and contracts with respect to the fixed part 46a. A spring force generated by the spring 44 acts between the fixed portion 46a and the movable portion 46b.

  A second roller 45 is connected to the movable portion 46 b via a support bar 47. One support bar 47 is provided at each end of the slide direction X. The support bar 47 is a substantially bar-shaped member that extends in the up-down direction Z through the center of the spring 44 at the end position in the slide direction X, through the fixing portion 46a. The support bar 47 is fastened to the movable portion 46b at one end side, and is connected to the second roller 45 at the other end side opposite to the one end.

  The second roller 45 is rotatably supported on the other end side of the support bar 47. The second roller 45 can be displaced in the vertical direction Z integrally with the movable portion 46b. The second roller 45 is a circular rotating body. Two second rollers 45 are provided on both sides of the bottom plate 50 in the width direction Y at a predetermined distance in the slide direction X, corresponding to the cam portions 42b. The rotation of the second roller 45 is performed around the support shaft extending in the width direction Y on the side surface of the bottom plate 50.

  The second roller 45 can be brought into contact with and engaged with the cam portion 42 b of the cam plate 42. The state in which the second roller 45 and the cam portion 42b are engaged with each other is the position in the sliding direction X of the slider case 31 with respect to the mounting plate 20, that is, the sliding position of the cam plate 42 and thus the slide plate 11 with respect to the fixed plate 10, as will be described in detail later. It changes according to. The second roller 45 can contact the inclined surface 42b-2 at the lower portion thereof and can engage the horizontal surface 42b-1.

  When the slide plate 11 is located at the surface pressure release position C, the second roller 45 does not contact the inclined surface 42b-2 and does not engage with the horizontal surface 42b-1. In this case, the spring force generated by the spring 44 is almost zero, and the spring force transmitted from the spring 44 to the cam portion 42b is almost zero. Therefore, the surface pressure load releasing mechanism 40 causes the fixed plate 10 and the slide plate 11 to move. The surface pressure applied between and is almost zero.

  In the process in which the slide plate 11 slides from the surface pressure release position C to the pouring stop position B, the second roller 45 contacts the inclined surface 42b-2. In this case, the spring force generated by the spring 44 gradually increases during the sliding process, and the spring force transmitted from the spring 44 to the cam portion 42b gradually increases. The surface pressure applied between 10 and the slide plate 11 gradually increases.

  And when the slide plate 11 is located in the normal slide range, the 2nd roller 45 contacts and engages with the horizontal surface 42b-1. In this case, the spring force generated by the spring 44 is maximized, and the surface pressure applied between the fixed plate 10 and the slide plate 11 by the surface pressure load releasing mechanism 40 is maximized.

  The surface pressure load releasing mechanism 40 includes a release jig 60 for releasing the surface pressure load between the fixed plate 10 and the slide plate 11. The release jig 60 is detachably attached to the slide device 30. The surface pressure load release mechanism 40 can release the surface pressure load when the release jig 60 is mounted on the slide device 30.

  The release jig 60 has a lever push / pull member 61. The lever push / pull member 61 is a member that can be attached and fixed to the cylinder joint 33. In the state where the lever push / pull member 61 is attached and fixed to the cylinder joint 33, the second arm portion 41b of the cam lever 41 is pushed and pulled in the slide direction X. A member that rotates the cam lever 41. The lever pushing / pulling member 61 may be divided into a plurality of parts, for example, in order to ensure ease of attachment to the cylinder joint 33, and these parts may be integrated with each other by bolt fastening or the like. .

  The lever push / pull member 61 can be attached to and detached from the cylinder joint 33 or can be moved at least in the slide direction X. The lever push / pull member 61 is formed in a shape that is cut out at the center of one side of the cross section while surrounding the outer periphery of the cylinder joint 33. That is, the lever push / pull member 61 includes a block portion 63 provided in a block shape at each end portion in the width direction Y, and a connecting portion 64 that extends in the width direction Y and connects the block portions 63 to each other. Have.

  The block part 63 is provided on the side (width direction Y) of the cylinder joint 33. When the block portion 63 is attached and fixed to the cylinder joint 33, the tip of the second arm portion 41b opposite to the first arm portion 41a of the cam lever 41 with respect to the first arm portion 41a to which the cam plate 42 is connected. Are arranged at positions where they can abut.

  A groove 63 a is formed in the block portion 63. The groove 63a is formed in a shape that can fit the tip of the second arm portion 41b of the cam lever 41 outside the normal sliding range of the slide plate 11. When the slide plate 11 is slid and moved in the slide direction X beyond the normal slide range by the slide device 30, the block portion 63 is fitted with the tip of the second arm portion 41 b of the cam lever 41 in the groove 63 a, so that the cam lever It is possible to apply a force for rotating around the rotation center by pressing in the slide direction X to the tip of the second arm portion 41b of 41.

  When the slide plate 11 is positioned within the normal slide range by the slide device 30, the tip of the second arm portion 41 b of the cam lever 41 does not fit into the groove 63 a of the block portion 63. No force to rotate from 63 is applied. In this case, the cam lever 41 is maintained at a rotational position where the cam portion 42 b of the cam plate 42 is engaged with the second roller 45.

  On the other hand, when the slide device 30 slides the slide plate 11 from the normal slide range to beyond the normal slide range in the slide direction X (specifically, the slide direction X +), the cam lever 41 is inserted into the groove 63a of the block portion 63. Since the tip of the second arm portion 41 b is fitted, a force for rotating the cam lever 41 from the block portion 63 is applied as the slide plate 11 slides by the slide device 30. In this case, the cam lever 41 is rotated in a direction for releasing the engagement between the cam portion 42 b and the second roller 45 (counterclockwise in FIGS. 4 and 8), and the cam plate 42 slides with respect to the bottom plate 50. It is moved in the direction X (specifically, the sliding direction X−).

  As shown in FIG. 12, the connecting portion 64 of the lever pushing / pulling member 61 is provided with a through hole 64a. The through hole 64 a is provided at the center of the connecting portion 64 in the width direction Y, and penetrates the connecting portion 64 in the vertical direction Z. The through hole 64a is formed in a shape into which a fixing attachment member 62 described later can be inserted. A recess 33 a is formed on the upper surface of the cylinder joint 33 that faces the connecting portion 64. The recess 33a is formed in a shape corresponding to the fixing attachment member 62, and the fixing attachment member 62 can be fitted therein. The recess 33a is provided at a position where it can communicate with the through hole 64a.

  As shown in FIG. 11, the fixing attachment member 62 is formed in a block shape that can be fitted into the through hole 64 a of the connecting portion 64 of the lever pushing member 61 and the concave portion 33 a of the cylinder joint 33. The fixing attachment member 62 has a handle portion 62a so that an operator can carry it. The fixing attachment member 62 can be attached to and detached from the connecting portion 64 of the lever push / pull member 61 and the cylinder joint 33.

  The fixing mounting member 62 is fitted and fitted into the through hole 64a and the recess 33a in a state where the through hole 64a of the connecting portion 64 of the lever push / pull member 61 and the recess 33a of the cylinder joint 33 communicate with each other. The When the fixing mounting member 62 is fitted in both the through hole 64a and the recess 33a, the fixing mounting member 62 is interposed between the lever pressing member 61 and the cylinder joint 33 so that the lever pressing member 61 is attached to the cylinder joint 33. Fix it. That is, the lever push / pull member 61 moves in the sliding direction X with respect to the cylinder joint 33 when the fixing mounting member 62 is fitted in the through hole 64a of the connecting portion 64 and the concave portion 33a of the cylinder joint 33. Fixed to impossible. When the slide device 30 slides the slide plate 11 in the slide direction X beyond the normal slide range in this state, it is possible to apply a force for rotating the cam lever 41 to the second arm portion 41b by the block portion 63. Become.

  Next, operation | movement of the surface pressure load cancellation | release mechanism 40 with which the sliding gate apparatus 1 of this embodiment is provided is demonstrated.

  The normal operation of the sliding gate device 1 is that the fixing mounting member 62 of the releasing jig 60 does not fit into the through hole 64a of the lever push / pull member 61 or the recessed portion 33a of the cylinder joint 33, that is, the lever. This is realized in a state where the push / pull member 61 is not fixed to the cylinder joint 33. In this state, even if the slide device 30 slides the slide plate 11 in the slide direction X, the lever push / pull member 61 cannot apply the force to rotate the cam lever 41 to the cam lever 41. As shown in FIG. 4, the cam lever 41 is maintained at the rotational position where the cam portion 42b of the cam plate 42 and the second roller 45 are engaged.

  When the cam portion 42b and the second roller 45 are engaged, the movable portion 46b of the spring box 46 approaches the fixed portion 46a (that is, one direction in which the spring 44 contracts in the vertical direction Z). ) Lifts up to displace. For this reason, since a large spring force is generated by the spring 44 between the fixed portion 46 a and the movable portion 46 b, a surface pressure is applied between the fixed plate 10 and the slide plate 11. Therefore, in this case, the surface pressure load releasing mechanism 40 applies a surface pressure between the fixed plate 10 and the slide plate 11.

  Next, in the normal operation state in which the surface pressure is applied between the fixed plate 10 and the slide plate 11 as described above, for example, when the replacement of the fixed plate 10 and the slide plate 11 is required, the plate replacement is realized. In addition, it is necessary to release the surface pressure load by the surface pressure load releasing mechanism 40. Release of the surface pressure load by the surface pressure load release mechanism 40 is performed according to the following procedure.

  Specifically, for example, after the above replacement request, first, the fixing mounting member 62 of the release jig 60 is manually moved by both the through hole 64a of the lever push / pull member 61 and the recess 33a of the cylinder joint 33 by the operator's manual operation. Fitted. In a state where the fixing mounting member 62 is fitted in the through hole 64 a of the lever pushing member 61 and the recess 33 a of the cylinder joint 33, the lever pushing member 61 is fixed to the cylinder joint 33. Next, the slide device 30 slides the slide plate 11 in the slide direction X + from the normal slide range to the surface pressure release position C beyond the normal slide range. When the slide plate 11 is slid and moved in the slide direction X + beyond the normal slide range, the lever pushing / pulling member 61 applies a force for rotating the cam lever 41 to the cam lever 41.

  In this state, as shown in FIG. 14, the cam lever 41 is rotated about the rotation center in a direction for releasing the engagement between the cam portion 42b and the second roller 45, and the cam plate 42 is moved in the sliding direction X−. Move to. When the cam plate 42 is moved in the slide direction X- by the rotation of the cam lever 41, the engagement between the cam portion 42b (specifically, the horizontal surface 42b-1) and the second roller 45 is released, and the spring The movable part 46b of the box 46 is pushed down so as to be displaced in a direction away from the fixed part 46a (that is, the other direction in which the spring 44 is extended in the vertical direction Z). For this reason, the spring force of the spring 44 generated between the fixed portion 46a and the movable portion 46b is reduced, and the surface pressure load between the fixed plate 10 and the slide plate 11 is released. Therefore, in this case, the surface pressure load releasing mechanism 40 releases the surface pressure load between the fixed plate 10 and the slide plate 11.

  The rotation of the bottom plate 50 with respect to the mounting plate 20 around the hinge pin 51 is permitted in a state where the surface pressure load between the fixed plate 10 and the slide plate 11 is released by the surface pressure load release mechanism 40. It is prohibited when the surface pressure is applied. When the bottom plate 50 is rotated by the operator's manual operation with respect to the mounting plate 20 in a state where the surface pressure load is released, the bottom plate 50 is opened. In this case, since the bottom plate 50 and the mounting plate 20 are largely separated from each other, the slide plate 11 of the slider case 31 and the fixed plate 10 held by the mounting plate 20 can be attached and detached. Can be exchanged.

  After the plates 10 and 11 are exchanged as described above, a surface pressure is applied between the fixed plate 10 and the slide plate 11 by a procedure reverse to the above procedure. Specifically, after the exchange of the plates 10 and 11, the bottom plate 50 is rotated from the open state to the closed state with respect to the mounting plate 20, and then the slide device 30 moves the slide plate 11 to the normal slide range. Slide and move in the sliding direction X-. When this sliding movement is performed, the block portion 63 of the releasing jig 60 is moved together with the cylinder joint 33 in the sliding direction X-, so that the cam lever 41 is moved away from the cam portion 42b by the movement of the block portion 63. The second roller 45 is rotated in the direction in which the second roller 45 is engaged. After the engagement, the fitting of the second arm portion 41 b of the cam lever 41 to the groove 63 a of the block portion 63 is released. In this case, since the cam portion 42b and the second roller 45 are engaged by the movement of the cam plate 42 in the sliding direction X +, the surface pressure is applied between the fixed plate 10 and the slide plate 11 by the spring force of the spring 44. Be loaded.

  As described above, in the sliding gate device 1 of the present embodiment, when the slide plate 11 is located within the normal slide range between the pouring position A and the pouring stop position B, the surface pressure load releasing mechanism 40 is used. Applies a surface pressure between the fixed plate 10 and the slide plate 11. On the other hand, when the slide plate 11 is located at the surface pressure release position C outside the normal slide range, the surface pressure load release mechanism 40 releases the surface pressure load.

  That is, when the slide movement of the slider case by the slide device 30 is performed within the normal slide range, that is, when the nozzle hole 4a of the insert nozzle 4 of the molten steel container 2 is controlled to open and close, the surface pressure load release mechanism 40 is The surface pressure load is performed. On the other hand, in a state where the release jig 60 that can be attached to and detached from the slide device 30 is attached and fixed to the cylinder joint 33 of the slide device 30, the slide movement of the slider case 31 by the slide device 30 is performed beyond the normal slide range. If it is broken, the surface pressure load releasing mechanism 40 releases the surface pressure load.

  Accordingly, the opening / closing control of the nozzle hole 4a of the insert nozzle 4 in which the slide plate 11 is slid and moved within the normal slide range with the surface pressure applied between the fixed plate 10 and the slide plate 11, and the surface pressure. The load release control can be realized by the sliding movement in the sliding direction X by the same sliding device 30, and can be realized only by the sliding movement by one sliding device 30. For this reason, the entire configuration for realizing both the nozzle opening / closing control and the surface pressure load release control can be simplified.

  Further, the release of the surface pressure load by the surface pressure load release mechanism 40 is not realized unless the release jig 60 is attached and fixed to the cylinder joint 33 of the slide device 30. That is, when the release jig 60 is fixedly attached to the cylinder joint 33 and the slide movement of the slide plate 11 by the slide device 30 exceeds the normal slide range and reaches the surface pressure release position C, the release is performed. The jig 60 rotates the cam lever 41 of the surface pressure load releasing mechanism 40 in a direction to release the surface pressure. When the cam lever 41 is rotated in the surface pressure release direction, the spring force of the spring 44 disappears, and the surface pressure load between the fixed plate 10 and the slide plate 11 is released.

  On the other hand, during the nozzle opening / closing control in which the surface pressure is applied between the fixed plate 10 and the slide plate 11, the release jig 60 is not attached and fixed to the cylinder joint 33. When the releasing jig 60 is not attached and fixed to the cylinder joint 33, the cam lever 41 of the surface pressure load releasing mechanism 40 is not rotated in the surface pressure releasing direction. In this case, since the spring force of the spring 44 is maintained, a state in which a surface pressure is applied between the fixed plate 10 and the slide plate 11 is maintained, and release of the surface pressure load is avoided.

  Further, during the nozzle opening / closing control, the slide movement of the slide plate 11 by the slide device 30 is normally limited within the slide range, so even if the release jig 60 is mounted and fixed to the cylinder joint 33, The releasing jig 60 does not rotate the cam lever 41 of the surface pressure load releasing mechanism 40 in the surface pressure releasing direction. Also in this case, since the spring force of the spring 44 is maintained, a state in which a surface pressure is applied between the fixed plate 10 and the slide plate 11 is maintained, and release of the surface pressure load is avoided.

  Therefore, during the opening / closing control of the nozzle hole 4 a of the insert nozzle 4 of the molten steel container 2, the slide movement of the slide plate 11 is restricted within the normal slide range or the release jig 60 is removed from the slide device 30. Thus, it is possible to reliably avoid the release of the surface pressure load between the fixed plate 10 and the slide plate 11 by the surface pressure load releasing mechanism 40 during the opening / closing control.

  In this respect, according to the sliding gate device 1 of the present embodiment, the opening / closing control of the nozzle hole 4a of the insert nozzle 4 in the surface pressure load state between the fixed plate 10 and the slide plate 11, the control of releasing the surface pressure load, Can be reliably prevented from being released during the opening / closing control of the nozzle hole 4a.

  In the sliding gate device 1, in order to release the surface pressure load between the fixed plate 10 and the slide plate 11 by the surface pressure load release mechanism 40, the release jig 60 is mounted and fixed to the cylinder joint 33 of the slide device 30. Specifically, it is necessary that the fixing attachment member 62 is fitted into the through hole 61a of the lever push / pull member 61 and the recess 33a of the cylinder joint 33 by the operator's manual work. In switching between the above-described surface pressure load by the surface pressure load releasing mechanism 40 and its release, the operator attaches or fixes the release jig 60 to the slide device 30 or the release jig 60 that is attached and fixed. It is enough to carry out the work of removing. Further, when switching between the surface pressure load and its release, it is not necessary to attach a surface pressure load / release tool or the like separately from the block-shaped fixing mounting member 62 to the sliding gate device 1. For this reason, in configuring the surface pressure load releasing mechanism 40, cost reduction and work load reduction are achieved.

  Furthermore, in order to apply a surface pressure between the fixed plate 10 and the slide plate 11, it is necessary to engage the cam portion 42 b of the cam plate 42 with the second roller 45 and to release the surface pressure load. For this purpose, it is necessary to release the engagement between the cam portion 42b and the second roller 45. In this regard, the cam portion 42b is a component that comes into contact with the second roller 45 when engaged with the second roller 45 and is consumed due to changes over time.

  The cam portion 42b is attached to the plate main body portion 42a of the cam plate 42 so as to be detachable and replaceable with a bolt or the like. For this reason, since the cam part 42b of the cam plate 42 can be easily replaced, it is not necessary to replace the entire cam plate 42 when the cam part 42b is consumed.

  By the way, in the above-described embodiment, the surface pressure load releasing mechanism 40 is connected to the distal end portion of the first arm portion 41a of the cam lever 41 and has a cam plate 42 having a block-like cam portion 42b formed in a wedge shape, And a rotatable circular second roller 45 connected to the movable portion 46b of the spring box 46 via a support bar 47. The surface pressure load is controlled by the presence / absence of engagement between the cam portion 42 b and the second roller 45. However, the present invention is not limited to this. Conversely, the surface pressure load releasing mechanism 40 is fastened to the circular roller rotatably supported by the plate member connected to the first arm portion 41a of the cam lever and the movable portion 46b of the spring box 46 or the movable portion 46b thereof. It is also possible to have a block-shaped cam portion attached to the support bar 47, which is formed in a wedge shape, and the surface pressure load may be controlled by the presence or absence of engagement between these rollers and the cam portion. Even in the configuration of this modified embodiment, the same effect as the above embodiment can be obtained.

  Further, the surface pressure load release mechanism 40 includes a block-shaped cam portion formed in a wedge shape and a circular roller. However, the present invention is not limited to this. The surface pressure load releasing mechanism 40 may include a block-shaped cam portion in which only a horizontal surface is formed, and an elliptical or wedge-shaped roller. Even in the configuration of this modified embodiment, the same effect as the above embodiment can be obtained.

  The present invention is not limited to the above-described embodiments and modifications, and various modifications can be made without departing from the spirit of the present invention.

DESCRIPTION OF SYMBOLS 1 Sliding gate apparatus 2 Molten steel container 2a Through hole 4 Insert nozzle 4a Nozzle hole 10 Fixed plate 10a Through hole (fixed side through hole)
11 Slide plate 11a Through hole (Slide side through hole)
DESCRIPTION OF SYMBOLS 20 Mounting plate 30 Slide apparatus 31 Slider case 40 Surface pressure load cancellation | release mechanism 41 Cam lever 42 Cam plate 42a Plate main-body part 42b Cam part 43 1st roller 44 Spring 45 2nd roller 46 Spring box 46a Fixed part 46b Movable part 47 Support bar 50 Bottom plate 60 Release jig 61 Lever push / pull member 62 Fixing mounting member

Claims (4)

A fixed plate having a fixed side through hole that is fixed to the molten steel container and communicates with a nozzle hole of an insert nozzle that pours molten steel in the molten steel container;
The slide-side through-hole that can communicate with the fixed-side through-hole is slidably moved with respect to the fixed plate, and the slide-side through-hole communicates with and does not communicate with the fixed-side through-hole by sliding movement. And a slide plate that opens and closes the nozzle hole by switching between
A slide device for slidingly moving a slider case for detachably holding the slide plate;
When the slide plate is positioned within the normal slide range, a surface pressure is applied between the fixed plate and the slide plate, and the slide plate is positioned beyond the normal slide range. A surface pressure load releasing mechanism for releasing the load of the surface pressure,
The surface pressure load releasing mechanism is
A release jig that is detachably attached to the slide device;
A cam lever that is pivotally attached to the molten steel container side and that is pivoted by one end being pushed and pulled by the release jig attached to the slide device,
A plate member connected to the other end of the cam lever and moving with the rotation of the cam lever;
A spring member that expands and contracts in accordance with the movement of the plate member and can generate a force for applying the surface pressure between the fixed plate and the slide plate;
A sliding gate device. The release jig is
A lever push-pull member for pushing and pulling one end of the cam lever;
A fixing attachment member that is detachably interposed between the lever push-pull member and the slide device, and fixes the lever push-pull member to the slide device at the time of mounting;
The sliding gate device according to claim 1, comprising: The plate member has a cam portion that expands and contracts the spring member,
3. The sliding gate device according to claim 1, wherein the surface pressure load releasing mechanism includes an engaging portion that is connected to one end of the spring member and engages with the cam portion according to the movement of the plate member.   The sliding gate device according to claim 3, wherein the cam portion is replaceable with respect to a main body of the plate member.

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