JP2016055267A - Tip cutter and drilling machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tip cutter and a drilling machine, capable of providing a rotation center of the drilling machine on a desired position, and stabilizing direction of a revolving shaft of the drilling machine.SOLUTION: A tip cutter 60, which is attached to the tip of a drilling machine for drilling a catalyst by being driven rotatively in a reaction tower, includes: a drilling part 61 provided on the center of the tip on the drilling direction side, and extending along the axis X; a cylindrical stabilizer 62 provided coaxially with the drilling part 61, and extending in the axis X direction; and a connection part 63 for connecting the drilling part 61 to the stabilizer 62.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a tip cutter for excavating a catalyst used in a reaction tower such as an oil refinery plant or a chemical plant, and an excavator equipped with the cutter.

  Conventionally, a catalyst used in a reaction tower such as an oil refinery plant or a chemical plant needs to be recovered from the reaction tower after being used in a chemical reaction. A suction-type recovery device is known as a device for recovering a used catalyst.

  In the catalyst recovery apparatus described in Patent Document 1, the catalyst in the reaction tower is sucked by a suction hose with one end inserted from a manhole provided on the upper surface of the reaction tower. At this time, the tip of the suction hose is in contact with the upper surface of the catalyst.

  In the catalyst recovery apparatus described in Patent Document 1, the recovery operation of the catalyst in the reaction tower will be described. First, prior to the catalyst recovery operation, the operator pulls out the accumulated liquid such as heavy oil from the reaction tower that has been completely cooled after the operation of the reaction tower is stopped.

  Then, the catalyst in the reaction tower is sucked by a suction hose with one end inserted from a manhole provided on the upper surface of the reaction tower. The sucked catalyst is sent from the suction hose through the guide tube to the separator body.

Since the catalyst recovery device described in Patent Document 1 sucks the catalyst with a suction hose, the catalyst cannot be sufficiently sucked when the catalyst is solidified.
The catalyst recovery apparatus described in Patent Literature 2 includes an excavator for excavating a solid catalyst. This excavator is configured to be rotationally driven by a motor.
The excavator has a pair of open / close arms 33 that are opened and closed by driving a cylinder. When the excavator rotates, the excavator excavates the catalyst in a conical shape by a cutter 33A attached to the lower surface of the open / close arm 33.
A tip cutter is attached to the tip of the excavator. The tip cutter strikes the catalyst before the excavator and guides the excavator in the excavation direction.
The tip cutter includes a bottomed pipe whose bottom is open, a cutter mounting plate fixed to the tip of the bottomed pipe, and a plurality of cutters provided on the tip side of the cutter mounting plate. The cutter mounting plate extends in the diameter direction of the bottomed pipe, and the width thereof is larger than the outer diameter of the bottomed pipe. That is, both ends of the cutter mounting plate protrude from the bottomed pipe, and both side surfaces of the cutter mounting plate are positioned on the outermost side during rotation.

JP 2009-195878 A JP-A-4-45840

However, the tip cutter described in Patent Document 2 is such that the plate-like cutter mounting plate and the cutter first come into contact with the catalyst. Therefore, when the catalyst is solid, it is difficult to bite into the catalyst, and the rotation center of the excavator Sometimes deviated from the center of the reaction tower.
Further, since the cutter mounting plate is difficult to bite into the catalyst, the straight traveling performance is poor, and the excavator cannot be guided properly. For example, the orientation of the rotating shaft is not stable and so-called core blur may occur.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a tip capable of providing the rotation center of the excavator at a desired position and stabilizing the direction of the rotation shaft of the excavator. We are providing cutters and excavators.

  The tip cutter of the present invention is a tip cutter attached to the tip of an excavator that is driven to rotate in the reaction tower and excavates the catalyst, and is provided at the center of the tip on the excavation direction side and extends along the axis. And a cylindrical stabilizer provided coaxially with the drill portion and extending in the axial direction, and a connecting portion connecting the drill portion and the stabilizer.

In the present invention having this configuration, a drill portion provided at the center of the tip on the excavation direction side and extending along the axis is first screwed into the catalyst, and the connecting portion or the stabilizer hits the catalyst while being guided by the drill portion. When the connecting portion or the stabilizer hits the catalyst, the diameter of the catalyst hole, which has been about the same as the diameter of the drill portion, is increased.
Thus, since the drill part which contacts a catalyst first hits a catalyst by a point contact, a drill part is easily screwed into a catalyst. For this reason, a drill part can be screwed correctly in the position which wants to make a rotation center. Since the drill portion guides the excavator until the connecting portion or the stabilizer hits the catalyst, the direction of the rotating shaft of the excavator can be stabilized. In addition, since the drill portion guides the excavator even after the connecting portion or the stabilizer hits the catalyst, the direction of the rotary shaft of the excavator can be continuously stabilized.
When the cylindrical stabilizer extending in the axial direction begins to bite into the catalyst, the stabilizer's outer peripheral surface rotates while being guided by the inner peripheral surface of the catalyst hole. The direction of the rotary shaft of the excavator can be stabilized even after the guide at the part is added and the diameter and depth of the hole are increased. That is, after the drill portion is screwed into the catalyst, the direction of the rotating shaft of the excavator can be continuously stabilized.

In the tip cutter according to the present invention, it is preferable that the connecting portion is composed of a plate material having one end joined to the outer peripheral surface of the drill portion and the other end joined to the inner peripheral surface of the stabilizer.
In the present invention having this configuration, since the connecting portion is a plate material extending in the radial direction, the structural strength in the radial direction of the tip cutter is high. For this reason, the direction of the drill part joined to the connection part and the stabilizer can be stabilized.

In the tip cutter according to the present invention, it is preferable that the stabilizer extends in the excavation direction from the connecting portion, and a plurality of blades are provided at the tip.
In the present invention having this configuration, the stabilizer extends in the excavating direction from the connecting portion, so that the stabilizer contacts the catalyst next to the drill portion. Since a plurality of blades are provided at the tip of the stabilizer, it is possible to immediately bite into the catalyst after contact with the catalyst and stabilize the direction of the rotating shaft.
Further, the fact that the stabilizer is extended means that the stabilizer is elongated in the axial direction. Therefore, the inner peripheral surface of the catalyst hole can be in contact with a wider area, and the direction of the rotating shaft of the excavator can be reliably stabilized.

In the tip cutter of the present invention, it is preferable that the connecting portion is provided with a plurality of blades at the tip.
In this invention of this structure, since the some blade is provided in the front-end | tip of a connection part, a catalyst can be excavated rapidly.

  A tip cutter according to the present invention is an excavator provided with the tip cutter described above, extending in the axial direction, the tip connected to the base end of the tip cutter, and communicating with the outside of the reaction tower on the base end side; And a plurality of open / close arms rotatably connected to a tip portion of the tip pipe, and the plurality of open / close arms have a plurality of blades and rotate on a plane including an axis. And

In the present invention having this configuration, the catalyst is excavated while the tip cutter and the excavator rotate together. The excavated catalyst is conveyed to the outside of the reaction tower through the tip pipe.
When the open / close arm of the excavator rotates during rotation, the rotation image of the excavator changes from a rod shape to a triangular pyramid shape. Since the open / close arm has a plurality of blades, the excavator can gradually increase the diameter of the hole opened by the tip cutter while opening the open / close arm.
Further, as described above, the tip cutter stabilizes the direction of the rotary shaft of the excavator, so that even when the catalyst hole becomes deep and the diameter increases, stable excavation can be performed without causing core blurring. .

1 is an overall layout diagram showing a catalyst recovery device including a tip cutter according to an embodiment of the present invention. The block diagram which shows the electrical structure of the collection | recovery apparatus of a catalyst. The side view of an excavator part. It is a side view for demonstrating the form change of an excavator, (A) shows a fully-closed state, (B) shows a half-open state, (C) shows a fully-open state, respectively. The side sectional view of a tip cutter. The front view which looked at the front-end | tip cutter from the front end side of FIG. The sectional side view of a separator. The top view which shows the partition member of a separator. The side sectional view of the tip cutter of a modification. The front view which looked at the front-end | tip cutter of the modification from the front end side.

[Description of Configuration of Catalyst Recovery Device 1]
Hereinafter, a catalyst recovery device (hereinafter simply referred to as “recovery device”) 1 including a tip cutter 60 according to an embodiment of the present invention will be described with reference to the drawings.
A recovery apparatus 1 having a front end cutter 60 according to the present embodiment shown in FIG. 1 is an apparatus for recovering a catalyst in a reaction tower 2 by sucking it using a suction force of a vacuum car 5. is there.
The recovery apparatus 1 includes an excavator 30 that is inserted into the reaction tower 2 and crushes and sucks the catalyst while rotating, and the excavator 30 is connected to the lower end (upstream end), and the sucked catalyst is moved upward (downstream). A first suction passage 5A as a suction passage that flows to the side), a separator 10 that is connected to an upper end (downstream end) of the first suction passage 5A and temporarily stores the inflowing catalyst, a separator 10 and a vacuum car 5; A second suction passage 5B provided in between, a hopper 41 provided under the separator 10 for receiving the catalyst discharged from the separator 10, a transfer passage 42 for flowing the catalyst flowing out of the hopper 41 downstream, A flexible container bag (flexible container bag) 50 is provided as a collection container for storing the catalyst flowing out from the transfer passage 42.
In addition to the flexible container bag 50, the collection container may be a drum can, a flow bin, Tetsucon, or the like.

  In the reaction tower 2, a reactor manhole 2A as an opening is formed in the upper part, and a catalyst outlet 2B is provided in the lower part. An annular lid 2C is placed on the reactor manhole 2A. In the vicinity of the reaction tower 2, a stage 6 on which an operator can work on the reaction tower 2 and the separator 10 is provided.

The excavator 30 inserted into the reaction tower 2 is rotationally driven via a speed reducer 37 (see FIG. 1) by a motor 36 (see FIG. 1) provided at the upper end of the first suction passage 5A.
The excavator 30 is configured to be movable in the vertical direction by an electric chain block 8 suspended from the tip of an arm 7 extending from the stage 6. Specifically, the wire 8A of the chain block 8 is connected to the upper end portion of the first suction passage 5A, and when the chain block 8 winds up the wire 8A, the excavator 30 moves upward together with the first suction passage 5A. When the chain block 8 moves and pulls out the wire 8A, the excavator 30 moves downward together with the first suction passage 5A. The chain block 8 operates based on a control signal from the control unit 70 placed on the stage 6.

In addition, a steam hose 21 for injecting steam and an LGO hose 23 for injecting LGO (crude light oil) stored in an oil tank 22 on the stage 6 are inserted into the reactor manhole 2A of the reaction tower 2. Yes.
Steam has an effect of making it difficult for the catalyst to adhere to the excavator 30 and the first suction passage 5A, and LGO has an effect of imparting fluidity to the catalyst and making it hard to clog.
Steam and LGO are injected into the reaction tower 2 as necessary.

The electrical configuration of the recovery apparatus 1 is shown in the block of FIG.
The control unit 70 includes a microcomputer including a CPU (Central Processing Unit), a RAM (Random Access Memory), a ROM (Read Only Memory), and the like, and has an internal timer 70A. The control unit 70 is connected to an input operation unit 71 and various sensors and control devices described later. The control unit 70 controls the entire collection device 1 using the internal timer 70A and the like according to a control program stored in the ROM in accordance with a signal from the input operation unit 71 and the like.

The detailed configuration of the excavator 30 is shown in FIG.
The excavator 30 includes a tip pipe 31, a sliding cylinder 32 through which the tip pipe 31 is inserted and slidable in the axial direction with respect to the tip pipe 31, and one end rotatably pinned to the lower end portion of the tip pipe 31. A pair of open / close arms 33 coupled to each other, and a pair of connecting beams 34, one end of which is pivotally coupled to the slide pipe and the other end of which is pivotally coupled to the slide pipe.
A cutter 33 </ b> A having a plurality of continuous blades is attached to the lower surface of the open / close arm 33. The sliding cylinder 32 is connected to the tip of the piston rod of the cylinder 35. The cylinder tube tip of the cylinder 35 is connected to the tip pipe 31. The cylinder 35 operates according to the operation of the direction control valve 35A (see FIG. 2) controlled by a signal from the control unit 70 (see FIG. 2). The excavator 30 is configured to operate according to the expansion and contraction of the cylinder 35.

The operation mode of the excavator 30 is shown in FIGS.
When the cylinder 35 is contracted and the sliding cylinder 32 is located on the proximal end side of the distal end pipe 31, the excavator 30 is fully closed as shown in FIG. When the excavator 30 is inserted into the reaction tower 2, the excavator 30 is fully closed so as not to interfere with the edge of the reactor manhole 2A. Further, until the catalyst reaches a predetermined depth after starting to dig, the excavator 30 is maintained in a fully closed state so that the catalyst can be easily scraped. When the catalyst is dug up to a predetermined depth, the cylinder 35 is slightly extended and the sliding cylinder 32 is moved to the tip side, so that the excavator 30 is in the half-open state shown in FIG. spread. Then, the cylinder 35 is further extended, the excavator 30 is fully opened as shown in FIG. 4C, and the diameter of the hole is expanded to the vicinity of the inner wall of the reaction tower 2.
For example, when the catalyst near the bottom of the reaction tower 2 is crushed, it is possible to extend the cylinder 35 to the stroke end so that the excavator 30 is in an inverted state shown by a two-dot chain line in FIG.

A tip cutter 60, also called a tip auger, is flange-joined to the tip of the tip pipe 31 of the excavator 30.
The detailed configuration of the tip cutter 60 is shown in FIGS.
The tip cutter 60 includes a rod-shaped drill portion 61 provided at the center of the tip on the excavation direction side and extending along the axis X, a cylindrical stabilizer 62 provided coaxially with the drill portion 61, and the drill portion 61 and the stabilizer. And a connecting portion 63 that connects to 62.

  The stabilizer 62 is a member constituting the outer peripheral surface of the front end cutter 60, and the front end extends slightly to the front end side from the connecting portion 63. At the tip of the stabilizer 62, an inner blade 62A tilted inward and an outer blade 62B tilted outward are alternately provided.

The connecting portion 63 is made of a plate material that extends along the axis X direction, and is arranged symmetrically about the axis X in the side cross-sectional view shown in FIG. 5. They are arranged in a cross shape that intersects about the axis X. An opening 63 </ b> A is formed so as to straddle the joint of the connecting portion 63. The connecting portion 63 is joined to the inner peripheral surface of the stabilizer 62 at one end 63B of two sides parallel to the axis X, and is joined to the outer peripheral surface of the drill portion 61 at the other end. A tubular portion 64 with a flange is joined to the rear end portion of the connecting portion 63.
A plurality of blades 63 </ b> C extending in parallel with the axis X and arranged in the radial direction are provided on the side facing the distal end side of the connecting portion 63. The direction of the blade 63C is directed in the rotational direction (the counterclockwise direction in FIG. 6 in this embodiment).

  When excavating the catalyst with the excavator 30, first, the drill portion 61 of the tip cutter 60 is stuck in the catalyst. Since the drill part 61 is in point contact with the surface of the catalyst, the drill part 61 is easily stuck even when the catalyst is hardened. Next, the inner blade 62 </ b> A and the outer blade 62 </ b> B provided at the tip of the stabilizer 62 come into contact with the catalyst so as to draw a concentric circle on the outside of the drill portion 61. When further digging, this time, the blade 63C provided at the tip of the connecting portion 63 comes into contact with the catalyst in order from the inner one.

In this state, a hole having a slightly larger diameter than the stabilizer 62 is formed in the catalyst, and its depth gradually increases. In this state, the outer peripheral surface of the stabilizer 62 rotates while being guided by the inner peripheral surface of the catalyst hole, and eventually the entire outer peripheral surface of the stabilizer 62 rotates while being guided by the inner peripheral surface of the catalyst hole. It becomes like this.
In this way, the outer peripheral surface of the stabilizer 62 and the inner peripheral surface of the hole serve as a guide surface and guide the excavator 30, so that the rotation shaft of the excavator 30 is stabilized and so-called core blurring of the excavator 30 is suppressed. Can do.

  Then, the excavator 30 guided by the tip cutter 60 excavates the catalyst in a conical shape while deforming as shown in FIGS. 4A to 4C as described above. The excavated catalyst gathers at the top of the cone by gravity, and the collected catalyst is sucked from the lower end of the tubular portion 64 of the excavator 30.

The separator 10 is attached to a gantry (not shown) provided on the stage 6. A detailed configuration of the separator 10 is shown in FIG.
The separator 10 includes a separator main body 11 having a discharge port 11A for discharging the catalyst at the lower end and a communication port 11B formed at the upper portion for communicating with the second suction passage 5B, and guide tubes disposed inside the separator main body 11, respectively. 12 and the ejection pipe 13 and the internal space of the separator body 11 are divided into a first space 111 in which the guide pipe 12, the communication port 11 </ b> B and the ejection pipe 13 are disposed, and a second space 112 positioned below the first space 111. A partition member 14, a partition member drive mechanism 15 that drives the partition member 14, a lid member 16 that allows the second space 112 of the separator body 11 to be opened and closed, and an atmosphere release mechanism 17 that opens the second space 112 to the atmosphere. It has.

The separator body 11 is composed of one tank, and includes an upper cylindrical portion 113 disposed in the upper portion thereof, a lower cylindrical portion 114 disposed in the lower portion and having a diameter smaller than that of the upper cylindrical portion 113, and a lower cylinder. The tapered portion 115 and the upper tubular portion 113 are connected to each other, and the continuous internal space is decompressed as the vacuum car 5 sucks it.
The upper cylindrical portion 113 includes a top plate portion 1131 having a communication port 11B formed at the center thereof, and a cylindrical portion 1132 integrally formed on the outer periphery of the top plate portion 1131. The cylindrical portion 1132 is provided at an upper portion thereof. The ejection pipe 13 is attached, and a viewing window 1133 for inspection is provided below the ejection pipe 13. The front end of the second suction passage 5B is connected to the communication port 11B.

  The lower cylindrical portion 114 is a cylindrical portion whose lower end surface is the discharge port 11 </ b> A, and a slightly upper portion of the cylindrical portion is a mounting position of the partition member 14. Therefore, the first space 111 is composed of a space above the partition member 14 of the lower cylindrical portion 114, an internal space of the tapered portion 115, and an internal space of the upper cylindrical portion 113, and the second space 112 is the lower cylinder. It is constituted by a space between the partition member 14 and the lid member 16 of the shape portion 114.

The guide pipe 12 allows the catalyst to flow into the first space 111, and has a cylindrical base 120 connected to the first suction passage 5 </ b> A, and is integrally formed with the base 120 to guide the catalyst toward the ejection pipe 13. This is a structure having an arc-shaped first guide piece 121 and a second guide piece 122 that is provided on the first guide piece 121 and receives the gas ejected from the ejection pipe 13.
The base 120 is penetrated by the tapered portion 115, the base end side thereof is connected to the first suction passage 5 </ b> A, and the tip end side thereof is located in the first space 111.
The first guide piece 121 of the guide tube 12 is formed by cutting out the lower half of the cylindrical member, and is arranged to extend obliquely upward. Therefore, the catalyst moves along the first guide piece 121.

The structure of the partition member 14 and the partition member drive mechanism 15 is shown in FIG.
7 and 8, the partition member 14 includes a plate-like member 141 that is rotatably supported by the lower cylindrical portion 114 at the center portion of the side surface.
When the plate-shaped member 141 divides the first space 111 and the second space 112, the disk-shaped first plate surface portion 1411 exposed to the first space 111 and the second plate exposed to the second space 112 A pair of a surface portion 1412, a side surface portion 1413 connecting the outer peripheral edges of the first plate surface portion 1411 and the second plate surface portion 1412, and a pair of pivot portions provided on the side surface portion 1413 and freely rotatable on the lower cylindrical portion 114. And a rotation shaft portion 1414.

The partition member drive mechanism 15 includes an arm 151 having one end connected to the other of the pair of rotating shaft portions 1414, and a cylinder 152 having one end rotatably connected to the other end of the arm 151. It is a rotation mechanism. The partition member drive mechanism 15 drives the partition member 14 to a horizontal position that partitions the first space 111 and the second space 112 and a vertical position that allows the first space 111 and the second space 112 to communicate with each other. . The cylinder 152 operates according to the operation of the direction control valve 152A (see FIG. 2) driven by a control signal from the control unit 70 (see FIG. 2), and moves the arm 151 forward and backward.
The arm 151 extends in a direction orthogonal to the plane of the plate-like member 141.
The other end of the cylinder 152 is rotatably attached to the separator main body 11, and the partition member 14 is switched between the horizontal position and the vertical position via the arm 151 by being driven forward and backward.

As shown in FIG. 7, the lid member 16 includes a lid main body 160 that closes the discharge port 11 </ b> A formed on the lower end surface of the lower cylindrical portion 114, and an arm portion 161 whose one end is connected to the peripheral edge of the lid main body 160. And a balance weight 162 provided at the other end of the arm part 161 and a hinge part 163 that is rotatably supported in the middle of the arm part 161 and connected to the outer peripheral part of the lower cylindrical part 114.
When the second space 112 is under reduced pressure, the lid main body 160 closes the discharge port 11A due to the weight of the balance weight 162 even if the catalyst is deposited on the upper surface thereof, and the second space 112 is brought into the atmosphere. In the opened state, the opening operation is automatically performed depending on the weight of itself and the weight of the loaded catalyst.
The air release mechanism 17 includes a pipe 171 connected to the peripheral surface of the lower cylindrical portion 114 and a breaker 172 provided in the middle of the pipe 171, and receives a signal from the control unit 70 to receive the second space. 112 is opened to the atmosphere.

Next, the catalyst recovery operation in the reaction tower 2 performed using the recovery apparatus 1 will be described.
When the operator depresses the discharge start switch of the input operation unit 71, the chain block 8 is activated to start winding the wire 8A, and the excavator 30 and the first suction passage 5A are raised. At that time, the internal timer 70 </ b> A of the control unit 70 measures the time from the start of operation of the chain block 8.

The control unit 70 transmits a control signal to the chain block 8 assuming that a predetermined interval is formed between the excavator 30 and the upper surface of the catalyst when the predetermined time has elapsed and the internal timer 70A has expired. To stop. Thereby, winding of the wire 8A by the chain block 8 is completed, and the ascending of the excavator 30 and the first suction passage 5A is stopped. At this time, the excavator 30 is in a floating state in the reaction tower 2. In this state, a part of the catalyst in the first suction passage 5A spills downward from the first suction passage 5A due to its own weight, and the remaining catalyst flows to the separator 10 by the suction force of the vacuum car 5. As a result, the inside of the first suction passage 5A becomes empty.
The suction by the vacuum car 5 is continued without being interrupted during the catalyst recovery operation.

  On the other hand, in the separator 10, when the discharge start button of the input operation unit 71 is pressed, the control unit 70 drives the cylinder 152 of the partition member drive mechanism 15, so that the partition member 14 is positioned at a position where the plane is vertical, That is, the first space 111 and the second space 112 of the separator main body 11 are in a position where they are communicated with each other. The gas in the separator body 11 is sucked from the communication port 11B through the suction hose 5A2 to the vacuum car 5 side, whereby the first space 111 and the second space 112 of the separator body 11 are under reduced pressure. Further, the control unit 70 closes the breaker 172 of the atmosphere release mechanism 17 to prevent the second space 112 from being released to the atmosphere. As a result, the lid member 16 remains closed by the balance weight 162 at the discharge port 11 </ b> A communicating with the second space 112.

  Then, the catalyst in the reaction tower 2 is sent from the first suction passage 5 </ b> A to the first space 111 of the separator body 11 through the guide tube 12. The catalyst moves toward the ejection pipe 13 while being guided by the first guide piece 121 through the base portion 120 of the guide pipe 12. However, since gas is ejected from the ejection pipe 13, the catalyst is crushed and passes through the second space 112. To fall on the upper surface of the lid member 16. The gas is sucked to the vacuum car 5 side through the suction hose 5A2.

When a predetermined amount of catalyst is accumulated on the lid member 16, the catalyst is discharged to the outside.
When discharging the catalyst to the outside, the controller 70 drives the cylinder 152 of the partition member drive mechanism 15 to switch the partition member 14 to a position where the plane is horizontal. Then, the first space 111 and the second space 112 of the separator body 11 are partitioned, the catalyst is held in the first space 111 located on the upper surface of the partition member 14, and the second space 112 is under reduced pressure. Will remain.

  Then, when the control unit 70 opens the breaker 172 of the atmosphere release mechanism 17, the second space 112 that has been under reduced pressure is released to the atmosphere. Then, the lid member 16 is opened by the weight of the catalyst held on the upper surface thereof against the weight of the balance weight 162. The catalyst held on the upper surface of the lid member 16 falls freely and is temporarily held by the hopper 41. The lid member 16 that has been opened is lightened by dropping the catalyst held on the upper surface thereof, and the discharge port 11 </ b> A is closed again by the weight of the balance weight 162. Thereby, the sealed second space 112 is formed.

  The catalyst held in the hopper 41 falls freely from the opening at the lower end and is transferred into the transfer passage 42. At this time, the lower end portion of the transfer passage 42 is blocked by a stopper 43 that can be opened and closed. Then, after a predetermined amount of catalyst has accumulated in the transfer passage 42, the stopper 43 is opened, whereby the catalyst falls freely and is stored in the flexible container bag 50.

The internal timer 70 </ b> A of the control unit 70 measures the elapsed time after opening the breaker 172 of the atmosphere release mechanism 17.
When the predetermined time has elapsed and the internal timer 70A has expired, the control unit 70 determines that the catalyst has been discharged from the discharge port 11A and has closed the lid member 16, and transmits a control signal to the chain block 8. Start. Accordingly, the wire block 8 is started to be pulled out by the chain block 8, and the excavator 30 and the first suction passage 5A are lowered.
At that time, the internal timer 70 </ b> A measures the time from the start of operation of the chain block 8.
The control unit 70 stops transmitting the control signal to the chain block 8 assuming that the excavator 30 has landed on the catalyst when the predetermined time has elapsed and the internal timer 70A has timed up. Thereby, the drawing of the wire 8A by the chain block 8 is completed, and the lowering of the excavator 30 and the first suction passage 5A is stopped.

In the catalyst recovery operation described above, the transmission of the control command to each mechanism is performed according to the control program, but may be performed according to the operation by the operator.
However, the recovery device 1 of the present embodiment is provided with an interlock as safety instrumentation. For example, the breaker 172 of the atmosphere release mechanism 17 can be opened only after a predetermined time has elapsed since the chain block 8 was wound up. This prevents the lid member 16 from being opened before the excavator 30 and the first suction passage 5A are raised.
Similarly, the winding operation of the chain block 8 can be performed only after a predetermined time has elapsed since the breaker 172 of the atmosphere release mechanism 17 was closed. This prevents the excavator 30 and the first suction passage 5A from being lowered onto the catalyst while the lid member 16 is open.
As described above, instead of rejecting a specific operation by an operator, when an inappropriate operation is performed, a notification may be issued by light or sound.
These prevent the catalyst from being clogged in the first suction passage 5A even during manual operation.

[Effects of Embodiment]
In the embodiment, the following operational effects can be achieved.
Since the drill portion 61 that first contacts the catalyst hits the catalyst by point contact, the drill portion 61 is easily screwed into the catalyst. For this reason, the drill portion 61 can be accurately screwed into a position where the rotation center is desired. Since the drill unit 61 guides the excavator 30 until the connecting portion 63 or the stabilizer 62 hits the catalyst, the direction of the rotating shaft of the excavator 30 can be stabilized. Moreover, since the drill part 61 guides the excavator 30 even after the connecting part 63 or the stabilizer 62 hits the catalyst, the direction of the rotation shaft of the excavator 30 can be continuously stabilized. When the stabilizer 62 starts to bite into the catalyst, the outer peripheral surface of the stabilizer 63 slides with the inner peripheral surface of the hole of the catalyst. In addition, the direction of the rotating shaft of the excavator 30 can be stabilized even after the diameter and depth of the hole are increased. That is, after the drill part 61 is screwed into the catalyst, the direction of the rotating shaft of the excavator 30 can be continued and stabilized.

Since the connecting portion 63 is made of a plate material having one end joined to the outer peripheral surface of the drill portion 61 and the other end joined to the inner peripheral surface of the stabilizer 62, the structural strength in the radial direction of the tip cutter 60 is high. It has become. For this reason, the direction of the drill part 61 and the stabilizer 62 supported by the connection part 63 can be stabilized.
Moreover, since the connection part 63 is comprised combining the board | plate material which spreads along an axis line X direction, the excavated catalyst becomes easy to flow to the axis line X direction. Therefore, the excavated catalyst can be quickly sucked into the tip pipe 31 without clogging in the tip cutter 60.
Furthermore, since the plurality of blades 63C are provided at the tip of the connecting portion 63, the catalyst can be excavated quickly.

Since the stabilizer 62 extends in the excavation direction from the connecting portion 63, the stabilizer 62 comes into contact with the catalyst next to the drill portion 61. Since the tip of the stabilizer 62 is provided with a plurality of blades 62A and 62B, it is possible to immediately bite into the catalyst after contact with the catalyst and stabilize the direction of the rotation shaft.
Further, since the stabilizer 62 is elongated in the axial direction, the inner peripheral surface of the catalyst hole can be brought into contact with a wider area, and the direction of the rotating shaft of the excavator 30 can be reliably stabilized.

Since the excavator 30 has the openable openable / closable arm 33 to which the cutter 33 </ b> A is attached on the lower side, the diameter of the hole opened by the tip cutter 60 can be gradually increased while the openable arm 33 is opened.
Further, as described above, the tip cutter 60 stabilizes the direction of the rotating shaft of the excavator 30, so that even if the catalyst hole becomes deep and the diameter increases, stable excavation can be performed without causing core blurring. Can do.

[Modification]
A modified tip cutter 260 is shown in FIGS.
The same components as those in the above embodiment are denoted by the same reference numerals, and the description thereof is omitted as appropriate.
The modified tip cutter 260 differs from the tip cutter 60 of the above embodiment in the length of the drill portion 261 and the configuration of the stabilizer 262. Other configurations are the same.
The drill part 261 of a modification is shorter than the drill part 61 of the said embodiment.
The stabilizer 262 of the modified example has a shorter length in the direction of the axis X than the stabilizer 62 of the above-described embodiment, and is accommodated in the side 63B parallel to the axis X of the connecting portion 63. Furthermore, unlike the stabilizer 62 of the said embodiment, the stabilizer 262 of a modified example is not provided with the blade at the front-end | tip.

  When the catalyst is excavated by the excavator 30 to which the modified tip cutter 260 is attached, first, the drill portion 261 of the tip cutter 260 is stuck in the catalyst. Since the drill portion 261 makes point contact with the surface of the catalyst, the drill portion 261 can be easily stuck even when the surface of the catalyst is hardened. Next, this time, the blade 63C provided at the tip of the connecting portion 63 comes into contact with the catalyst in order from the inner one.

When excavation proceeds until the outermost blade 63C comes into contact with the catalyst, a hole having a diameter slightly larger than that of the stabilizer 262 is formed in the catalyst, and its depth gradually increases. In this state, the outer peripheral surface of the stabilizer 262 slides with the inner peripheral surface of the catalyst hole, and eventually the entire outer peripheral surface of the stabilizer 262 slides with the inner peripheral surface of the catalyst hole.
As described above, in the modified tip cutter 260, the connecting portion 63 contacts the catalyst before the stabilizer 262. Even in this case, until the stability due to the effect of the stabilizer 262 is obtained, the stability by the blades of the connecting portion 63 can be obtained, so that the direction of the rotating shaft of the excavator 30 can be stabilized.

In addition, this invention is not limited to the said embodiment and the said modification, The deformation | transformation shown below is included in the range which can achieve the objective of this invention.
For example, in the embodiment described above, the inner edge 62A inclined inward and the outer edge 62B inclined outward are alternately provided at the tip of the stabilizer 62. However, even if all the blades face the same direction. The blade may not be provided.

In the embodiment, the four connecting portions 63 intersecting with the axis X as the center are arranged in a cross shape when the connecting portions 63 are viewed in the direction of the axis X, but the adjacent connecting portions 63 form an angle of 120 °. Three connecting portions 63 may be arranged to extend in three directions.
In the above embodiment, the blade 63C of the connecting portion 63 extends in parallel with the axis X. However, the blade 63C does not have to be parallel to the axis X, and all the directions may face the same direction, and the blade is provided. It does not have to be done.
In the embodiment, the opening 63A is formed at the joint of the connecting portion 63, but the opening 63A may not be formed.

In the embodiment, the excavator 30 includes the two open / close arms 32, but the excavator 30 may include three or more open / close arms 32.
In the above-described embodiment, the opening / closing arm 32 is opened and closed by the cylinder 35, but may be performed by, for example, a motor or the like.

  The present invention can be used for all chemical plants using a catalyst.

  DESCRIPTION OF SYMBOLS 2 ... Reaction tower, 30 ... Excavator, 31 ... End pipe, 32 ... Opening / closing arm, 60 ... End cutter, 61 ... Drill part, 62 ... Stabilizer, 63 ... Connection part, 62A ... Inner blade of stabilizer, 62B ... Stabilizer Outer blade, 63C ... blade of connecting portion, X ... axis, 260 ... tip cutter, 261 ... drill portion, 262 ... stabilizer.

Claims (5)

A tip cutter attached to the tip of an excavator that is driven to rotate in the reaction tower and excavates the catalyst,
A drill portion provided at the center of the tip on the excavation direction side and extending along the axis;
A cylindrical stabilizer provided coaxially with the drill portion and extending in the axial direction;
A tip cutter comprising: a connecting portion connecting the drill portion and the stabilizer. The tip cutter according to claim 1,
The tip cutter is characterized in that the connecting portion is composed of a plate member having one end joined to the outer peripheral surface of the drill portion and the other end joined to the inner peripheral surface of the stabilizer. The tip cutter according to claim 1 or 2,
The tip cutter is characterized in that the stabilizer extends in the excavation direction from the connecting portion, and a plurality of blades are provided at the tip. A tip cutter according to any one of claims 1 to 3,
A tip cutter, wherein the connecting portion is provided with a plurality of blades at the tip. An excavator comprising the tip cutter according to any one of claims 1 to 4,
A distal end pipe extending in the axial direction, the distal end being connected to the proximal end of the distal end cutter, and communicating with the outside of the reaction tower on the proximal end side;
A plurality of opening and closing arms, one end of which is rotatably connected to the tip of the tip pipe;
The excavator characterized in that the plurality of open / close arms have a plurality of blades and rotate on a plane including an axis.

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