JP2012211816A - Dissolver pipeline cleaning device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a dissolver pipeline cleaning device which is suitable for cleaning and inspecting sludge deposited on a communication pipe catch basin of a dissolver installed in a cell and sludge accumulated in a bottom pipeline by remote operation.SOLUTION: In a dissolver pipeline cleaning device for cleaning and inspecting barrels 2b, 2c, a communication pipe catch basin 2e in a slab 2a, and a bottom pipeline 2f which constitute a dissolver 2 by a jig inserted into the barrels, the jig comprises: a crane hanger 8; a communication pipeline catch basin inspection/cleaning rod 9 provided with a high pressure water injection nozzle 9c and a camera 9d; an auxiliary rod 10 screw-connected to the communication pipeline catch basin inspection/cleaning rod; a bottom pipeline cleaning rod 11 provided with a high pressure water injection nozzle part 11c; a bottom pipeline inspection rod 12 provided with a reflector part 12c; and a shared extension rod 13. The communication pipeline catch basin inspection/cleaning rod 9, the bottom pipeline cleaning rod 11, or the bottom pipeline inspection rod 12 is connected under the crane hanger 8 via the auxiliary rod 10 or the shared extension rod 13.

Description

  The present invention relates to a dissolution tank pipe cleaning apparatus for cleaning a communication pipe pan and a bottom pipe of a dissolution tank.

  The reprocessing facility has multiple dissolution tanks that dissolve spent fuel, and each dissolution tank has two barrels (cylindrical dissolution sections that receive and dissolve spent fuel fragments). A slab (a plate-type liquid storage part in which a solution is retained and an instrumentation pipe or the like is stored) is provided. Each of the barrel and the slab is connected by a plurality of stages of pipes called communication pipes, and a metal mesh called a communication pipe pan is installed in some of the communication pipes. In addition, a bottom pipe (feeding spent fuel solution and cleaning waste liquid) is connected to the bottom of each barrel.

Since sludge accumulates in the slab and barrel of the melting tank as the spent fuel is melted, cleaning of the tank is required to maintain the function of the melting tank. However, the dissolution tank is installed in a high dose rate cell and cannot be accessed directly by the operator. For this reason, a sludge recovery device (Patent Document 1) remotely operated from outside the cell and a dissolution tank cleaning device (Non-Patent Documents 1 and 2) for injecting high-pressure water have been proposed for cleaning the dissolution tank. However, these devices are devices for cleaning the bottom of the slab and the barrel, and cannot directly clean the inside of the communication pipe pan connected to the barrel or the bottom piping.
Therefore, it has been difficult to remove (clean) sludge adhering to the communicating pipe pan using existing apparatuses (Patent Document 1, Non-Patent Documents 1 and 2).
In addition, the bottom pipe was washed by pushing the sludge inside the pipe by supplying pure water using the gravity flow from the mating part of the system, and then sludge collecting equipment. It has no effect on sludge clogged in piping.

JP 2002-148390 A

Atomic Energy Society of Japan, Autumn 2008 Proceedings Keiichi Kajita, et al., “Development of dissolution tank cleaning equipment (1) Development of high-pressure water cleaning equipment” Atomic Energy Society of Japan, 2008 Fall Meeting Proceedings Hirotaka Terunuma, et al., “Development of Dissolution Tank Cleaning Device (2) Application of High-Pressure Water Cleaning Device to Actual Machine”

  When the spent fuel is sheared, the dissolution tank is ventilated from the barrel through the slab, so that fine powder or the like adheres to the communicating pipe pan. In addition, pipes (liquid feed by siphon or steam jet) for sending spent fuel solution and cleaning waste liquid are arranged at the bottom of the barrel, and these pipes pass through a swarf basket. Sludge accumulates.

The jig for cleaning and inspecting the communication pipe pan and the bottom pipe has the following problems.
(1) A highly reliable technique is required for the cleaning and inspection jig.
(2) The cleaning and inspection jig used in the cell needs to have a shape and structure that can be remotely operated by a manipulator and a crane installed in the cell. In addition, the crane moving height in the cell is 2.1 m at the maximum, and the hanging hook can be lowered to the bottom of the barrel (about 7 m from the common cell floor).
(3) The communicating pipe pan is installed in the middle part of the barrel (about 3 m from the common cell floor), and the diameter of the barrel at that position is 270 mm, which is a relatively wide environment. It is desirable to use a cleaning and inspection jig suitable for this environment.
(4) The bottom piping is at the bottom of the barrel, and the barrel diameter at this position is a narrow environment of 100 mm. Therefore, it is necessary to adapt to cleaning and inspection work in a narrow environment.
(5) Since the cleaning and inspection jig used in the cell is a highly radioactive waste, it is necessary to increase the sharing and durability of parts and reduce the amount of waste. In addition, the dimension which can be accommodated in the waste container in a cell is (phi) 690mmx766mm or less.

  An object of the present invention is to realize a dissolution tank pipe cleaning apparatus suitable for remotely cleaning and inspecting sludge adhering to a communication pipe plate of a dissolution tank installed in a cell and sludge accumulated on a bottom pipe. There is.

In the dissolving tank piping cleaning device for cleaning and inspecting the communicating pipe pan and bottom pipe in the barrel and slab constituting the dissolving tank with a jig inserted into the barrel,
The jig includes a crane hanging tool, a high-pressure water spray nozzle and a communication pipe inspection / cleaning rod equipped with a camera, an auxiliary rod screw-coupled to the communication pipe inspection / cleaning rod, and a high-pressure water injection nozzle. A bottom pipe cleaning rod, a bottom pipe inspection rod with a reflector, and a common extension rod,
The communication pipe eye dish inspection and cleaning jig has a configuration in which a plurality of the common extension rod and the auxiliary rod are screw-coupled to the communication pipe eye dish inspection and cleaning rod under the crane suspension,
The bottom pipe cleaning jig has a configuration in which a plurality of the common extension rods and the bottom pipe cleaning rod are connected under the crane suspension,
The bottom piping inspection jig has a configuration in which a plurality of the common extension rods and the bottom piping inspection rod are connected under the crane suspension.

And each connection is configured to be detachable by a locking pin provided at the lower end portion of the upper rod to be connected and an upper connection portion provided at the upper end portion of the lower rod to be connected,
The upper connecting portion includes an insertion hole for inserting the upper rod, and a hand groove of an L-shaped locking pin engaging rod for engaging and engaging the locking pin of the upper rod inserted into the insertion hole. A latch slidably fitted to the rod so as to lock the locking pin so as to prevent the locking pin engaged with the flange from being fitted into the hand groove of the locking pin engaging rod. The structure is provided with a stop ring.

  According to the dissolution tank pipe cleaning apparatus of the present invention, the communication pipe pan and the bottom pipe in the dissolution tank can be efficiently cleaned to remove sludge, and the attachment / detachment (connection and separation) of the jig is simple. Therefore, it was possible to greatly reduce the time for cleaning and inspection work.

  Moreover, since the jig used for cleaning and checking the communication pipe pan and the bottom pipe shares the high-pressure water supply hose (20 m) and the common extension rod, the storage space can be saved.

Three dissolution tanks installed in the cell of the reprocessing facility, its piping system and shielding windows, a manipulator installed in the cell corresponding to each shielding window, and a crane showing part of the cell wall FIG. It is sectional drawing which shows the relationship between the slab in a dissolution tank, a barrel, a communicating pipe, a communicating pipe pan, and bottom part piping. It is a figure which shows the sterap provided corresponding to the barrel, (a) is a front view which shows the state which fell down the sterap, (b) is the top view, (c) is a front view which shows the state which stood up , (D) is a top view thereof. It is a figure which shows a retainer jig | tool, (a) is a front view, (b) is the left view, (c) is a top view. It is a figure which shows the combination state of a stellap and a retainer jig | tool, (a) is a front view which shows the state which installed the retainer jig | tool in the standing sterlap, (b) is the top view, (c) is standing The front view which shows the state which engaged the common extension rod with the made slap and latched by the retaining jig, (d) is the top view. It is a figure which shows a crane hanging tool, (a) is a front view, (b) is a side view. It is a figure which shows a communicating pipe eye plate inspection washing | cleaning rod, (a) is a front view, (b) is a side view. It is a figure which shows an auxiliary rod, (a) is a front view, (b) is the top view, (c) is a side view, (d) is the top view. It is a figure which shows the rod main body in the upper connection part in an auxiliary rod, (a) is a front view, (b) is the top view, (c) is a side view, (d) is the top view. It is a figure which shows the latching ring in the upper connection part of an auxiliary rod, (a) is a front view, (b) is a top view, (c) is a diagonal side view, (d) is a side view. It is a figure which shows the connection state of the upper connection part of a communicating pipe eye dish inspection washing rod, and the lower connection part of an auxiliary rod, (a) is a front view, (b) is a side view. It is a figure which shows a bottom part piping cleaning rod, (a) is a front view, (b) is the top view, (c) is a side view, (d) is the top view. It is a figure which shows a bottom part piping inspection rod, (a) is a front view, (b) is the top view, (c) is a side view, (d) is the top view. It is a figure which shows a common extension rod, (a) is a front view, (b) is the top view, (c) is a side view, (d) is the top view. It is a figure which shows the state which made the connection rod of the crane lifting tool face the upper connection part of the auxiliary rod, (a) is a front view, (b) is a side view. It is a figure which shows the state which inserted the connection rod of the crane lifting tool in the upper connection part of the auxiliary rod, and made the locking pin fit in the hand groove of the locking pin engagement rod, (a) is a front view, (b) ) Is a side view. Rotate the connecting rod of the crane lifting tool inserted into the upper connecting portion of the auxiliary rod to move the locking pin to the back of the hook portion of the locking pin engaging rod and face the locking groove of the locking ring It is a figure which shows the made state, (a) is a front view, (b) is a side view. It is a figure which shows the state which completed the connection of the connection rod of the crane lifting tool with respect to the upper connection part of an auxiliary rod, (a) is a front view, (b) is a side view. It is jig assembly operation explanatory drawing which connects a crane suspension, a communicating pipe eye plate inspection washing rod, and an auxiliary rod, (a) is a connection operation explanatory drawing of a crane hanging tool and an auxiliary rod, (b) is a communicating pipe eye plate. Explanatory drawing of the connection operation | work of an inspection cleaning rod and an auxiliary rod, (c) is a figure which shows the state which lifted the jig | tool in the middle of an assembly. It is jig | tool assembly operation explanatory drawing, (a) is a front view which shows the state which inserted the connecting pipe eye plate inspection washing rod into the barrel which fell down the sterap, (b) is the barrel which inserted the communicating pipe eye dish inspection washing rod It is a front view which shows the operation state which raises the sterap corresponding to 2 and inserts the rod main body of an auxiliary rod in a locking groove, and inserts a retaining jig and prevents it from coming off. It is jig | tool assembly operation explanatory drawing, (a) is a front view which shows the state which lowered | hung the hanging hook of the crane and seated the rod of the auxiliary rod on the sterap with the retaining jig interposed, (b) It is a front view which shows the state which pushed down the latching ring of the auxiliary | assistant rod seated on sterap, and cut | disconnected the crane lifting tool. It is jig assembly work explanatory drawing, (a) is a connection work explanatory drawing of a crane lifting tool and the 1st common extension rod, (b) is a connection work explanation of the 1st common extension rod and the 2nd common extension rod. FIG. 4C is a view showing a state in which a jig being assembled is lifted. It is jig | tool assembly operation explanatory drawing, (a) is on the auxiliary rod of the jig | tool which has seated the lower connection part of the lower shared extension rod on the sterap in the two shared extension rods suspended with the crane. The front view which shows the state connected with the connection part, (b) is a front view which shows the operation | work which removes the retainer jig | tool currently interposed between the sterlap and the auxiliary rod. The assembled communication pipe inspection / cleaning jig is lifted with a crane, the sterap is tilted down, and the high-pressure water jet nozzle part and reflector of the communication pipe inspection / cleaning rod are lowered to the position facing the communication pipe FIG. It is jig assembly work explanatory drawing, (a) is a connection work explanatory drawing of a crane lifting tool and a common extension rod, (b) is a connection work explanatory drawing which connects a bottom piping washing rod under a common extension rod, (c) ) Is a view showing a state where the bottom pipe cleaning jig is being lifted during assembly. It is jig | tool assembly work explanatory drawing, (a) is a front view which shows the state which inserted the bottom piping washing rod in the barrel which fell the sterap, (b) stands up the sterap corresponding to the barrel which inserted the bottom piping washing rod. FIG. 6 is a front view showing a working state in which the rod main body of the common extension rod is inserted into the locking groove and a retaining jig is inserted to prevent the common extending rod from being detached. It is jig | tool assembly operation explanatory drawing, (a) is a front view which shows the state which lowered | hung the hanging hook of the crane and seated the rod of the common extension rod on the sterlap with the retaining jig interposed therebetween, (b) FIG. 6 is a front view showing a state in which a crane suspension is detached by pushing down a locking ring of a common extension rod seated on a sterlap. It is a front view which shows the state which lifted up the assembled bottom piping washing jig with the crane, fell down the stellap, and lowered the high pressure water injection nozzle part of the bottom piping washing rod to the position facing the bottom piping. It is a front view which shows the bottom piping inspection state performed using the assembled bottom piping inspection jig.

  In the dissolution tank piping cleaning apparatus of the present invention, the cleaning is performed by a high-pressure water injection method that has a proven record in cleaning the dissolution tank, and the inspection is performed using a radiation-resistant camera or a commercially available CCD camera.

  Since the lifting height of the crane in the cell is 2.1 m, the jig is not an integral structure with a length of about 7 m or about 3 m, and it is considered to be housed in a waste container. , 760mm / rod rods are connected in a detachable manner.

  As a jig, a communication pipe eye dish inspection cleaning rod, a bottom piping cleaning rod, a bottom piping inspection rod, a common extension rod, an auxiliary rod, and a crane lifting tool are provided. The auxiliary rod is used to connect the communication tube plate inspection and cleaning rod, but the screw hole and the locking pin for connecting the communication tube plate inspection and cleaning rod are provided in the lower connection part of the auxiliary rod. Of these, the locking pin has the same shape as the locking pin of the common extension rod, and can also be used as a common extension rod of the bottom pipe cleaning rod or the bottom pipe inspection rod.

  The communication pipe eye dish inspection cleaning rod is equipped with a high pressure water injection nozzle and a camera, the bottom pipe cleaning rod is equipped with a high pressure water injection nozzle, the bottom pipe inspection rod is equipped with a reflecting mirror, and the common extension rod is the above communication pipe eye dish inspection cleaning. An auxiliary rod screwed to the rod, a bottom pipe cleaning rod, or a bottom pipe inspection rod is connected to the upper end of the bottom pipe inspection rod and the bottom pipe cleaning rod or the bottom pipe cleaning rod or the bottom pipe inspection rod of the barrels 2b and 2c. A jig that can be lowered to a predetermined position is configured.

  The cleaning and inspection of the communication pipe pan is performed using a jig constructed by connecting the communication pipe inspection and cleaning rod, auxiliary rod, and two common extension rods. The pipe cleaning rod or the bottom pipe inspection rod and nine common extension rods are connected to each other to use a jig. One of the nine common extension rods uses an auxiliary rod as a common extension rod.

  The rod connection method uses a hand groove of an L-shaped locking pin engaging rod to engage and engage with a locking pin, a spring and a locking ring in order to enhance the remote operability by the manipulator. The lock pin at the lower end is inserted into the hand groove of the lock pin engagement rod from the upper end portion of the rod and rotated to engage with the hand groove of the lock pin engagement rod and pressed by the spring force. The locking pin is prevented from coming off by the locking groove of the locking ring, and the rods are fitted and locked (connected). In addition, each rod is provided with a manipulator gripping portion to enhance handling properties.

  Regarding the communication pipe eye dish washing, since the two common extension rods and one auxiliary rod used for washing (inspecting) the bottom pipe are shared, the barrel diameter is 270 mm, which is a relatively wide environment. A composite structure that can be cleaned while inspecting. In addition, since the conventional high-pressure water injection nozzle has few straight flow path portions in the injection direction, the water force in the injection direction is small and the cleaning effect is small, the length of the straight flow passage portion in the injection direction is long with one injection nozzle ( (130 mm), the turbulent flow of the high-pressure water flow in the jig is suppressed, and the injection hitting force is increased (0.12 MPa, 10 times the conventional value). Further, in order to reduce the cost, the connecting portion of the communicating-tube-eye-washing rod and the auxiliary rod has a screw coupling configuration, and the auxiliary rod can also be used as a common extension rod.

  Since the bottom of the barrel has a diameter of 100 mm, it is difficult to make the cleaning rod and the inspection rod provided with the mirror which is injected and sprayed with the high-pressure water to be inserted here, so that they are configured separately. .

  Each rod constituting the jig has a size that can be accommodated in a waste container and is made of stainless steel. Further, a high-pressure water supply hose (20 m in length) for washing the communication pipe and the bottom pipe is: Shared by selectively connecting couplers to both jigs. Each rod uses a tube material in order to reduce the weight while securing the strength.

  FIG. 1 shows three cell tanks installed in a cell of a reprocessing facility, its piping system and shielding windows, a manipulator installed in the cell corresponding to each shielding window, and a crane. The department is shown. Moreover, FIG. 2 has shown the relationship between the slab in this dissolution tank, a barrel, a communicating pipe, a communicating pipe pan, and bottom part piping.

  The interior of the cell 1 is divided into two upper and lower stages, and each dissolution tank 2 installed in the lower chamber 1a includes a slab 2a, barrels 2b and 2c installed on both sides of the slab 2a, and a slab 2a and a barrel 2b. 2c, a plurality of communication pipes 2d, and a communication pipe pan 2e installed on a part of the communication pipes 2d.

  A bottom pipe 2f connected to a siphon or a steam jet is connected to the bottom of each barrel 2b, 2c.

  The head of each barrel 2b, 2c opens into the floor 1c of the upper chamber 1b, and a cleaning or inspection jig can be inserted into the opening by removing the lid 2g fitted into the opening. It is a possible configuration.

  Corresponding to the head openings of the barrels 2b and 2c, the floor 1c of the upper chamber 1b is provided with a sterlap 3 used when operating the lid 2g. As will be described in detail later, this sterap 3 is used for the operation of the lid 2g and the operation of the cleaning or inspection jig.

  Exhaust gas during the shearing of each dissolution tank 2 is sent from the barrels 2b and 2c through the slab 2a to the waste gas treatment process via the gas pipe 4 in the upper chamber 1b. The barrels 2b and 2c are configured to supply spent fuel pieces from the distributor 5 via the supply pipe 5a.

Further, the cover 2g is provided with a plug 2g ₄ at the upper end, it is coupled to the lower end of the connecting rod 2g ₃ which is coupled to knob 2g ₁ through the lid body 2g ₂ slidably. The plug 2g ₄ cuts off the communication between the supply pipe 5a and the barrel in the lowered position (the state shown by the barrel 2c in FIG. 2), and in the raised position locked to the sterlap 3 at the raised position, To communicate (state shown in the barrel 2b in FIG. 2).

  The upper chamber 1b includes a shielding window 1d at a position corresponding to the heads of the barrels 2b and 2c, a manipulator 6 installed in the room corresponding to each shielding window 1d, and a crane 7 on the ceiling.

  As shown in FIG. 3, the stellap 3 is a band-shaped curved metal fitting that is pivotally supported on both ends so as to be able to undulate on the floor 1c. When it wakes up, it stands up on the opening of the barrels 2b and 2c and becomes independent. A locking groove 3a is formed in the central portion of the stellap 3 so as to open on the side edge of the belt-like body so as to be positioned on the center of the opening while standing on the opening of the barrels 2b and 2c. Prepare. The locking groove 3a is formed at the edge on the side that opens upward when the stellap 3 is tilted.

Further, as shown in FIG. 4, the stellap 3 includes a retaining jig 3 b. The retaining jig 3b is a jig for preventing the cleaning or inspection jig inserted and locked in the locking groove 3a of the sterlap 3 from coming out of the locking groove 3a. open to the edge of one side of the body 3b ₁ constructed in substantially square with corresponding grooves 3b ₂ and the locking groove 3a so as to extend in a direction perpendicular to the該辺, the side formed with the groove 3b ₂ is A locking edge 3b ₃ that is bent downward and locked to the side edge of the sterlap 3 is provided, and a knob 3b ₄ that is gripped by the manipulator 6 is provided on one side of the opposite side.

  FIG. 5 shows a state in which the retaining jig 3b is locked to the standing sterlap 3, and the retaining jig 3b is engaged with the stellap 3 as shown in (a) and (b). When the common extension rod 13 (details will be described later) engaged with the locking groove 3a of the sterap 3 is retained, the state shown in (c) and (d) is obtained.

  The crane suspension for configuring the jig, the communication pipe inspection dish cleaning rod, the auxiliary rod, the bottom piping cleaning rod, the bottom piping inspection rod, and the common extension rod are configured as follows.

  FIG. 6 shows the crane suspension 8. The crane suspension 8 includes an annular portion 8a for engaging a suspension hook of the crane 7, an auxiliary rod, a bottom piping cleaning rod, a bottom piping inspection rod, or a common extension rod that is screw-coupled to a communication pipe inspection plate cleaning rod described later. A connecting rod 8b that fits into the head (upper connecting portion) of the head and a locking pin 8c that engages with the inserted rod head.

  FIG. 7 shows a communication tube dish inspection and cleaning rod 9 for constituting a communication tube dish inspection and cleaning jig. This communication pipe inspection dish cleaning rod 9 is installed horizontally on a rod body 9a made of a pipe material, an upper connecting portion 9b for connecting the upper end portion of the rod body to an auxiliary rod described later, and a lower end portion of the rod body 9a. The high pressure water jet nozzle portion 9c, a camera (radiation resistant camera or CCD camera) 9d installed in the middle of the rod main body 9a downward along the rod main body 9a, and the high pressure water positioned below the camera 9d. Reflecting mirror 9e that reflects the ambient light image in the spraying direction (lateral direction) of the spray nozzle portion 9c in the direction of the camera 9d, the high-pressure water supply system 9f to the high-pressure water spray nozzle portion 9c, and this communication pipe eye dish inspection cleaning A leg portion 9g for raising the rod 9 on the floor surface is provided.

The upper connecting portion 9b of the rod main body 9a is opened at the upper end of the rod main body 9a so as to fit the locking pin of the auxiliary rod when the lower end of the auxiliary rod is inserted and connected to the rod main body 9a from above. The locking pin engaging groove 9b ₁ formed in this manner and two coupling screws 9b ₂ for fastening the inserted auxiliary rod to the rod body 9a together.

High pressure water injection nozzle portion 9c is a bottom injection nozzle 9c ₂ sideways on the lower surface of the support plate 9c ₁ bound was attached to the structure of the rod body 9a. Injection nozzle 9c ₂ is configured to horizontally (horizontal) direction of the channel is as much as possible longer.

The camera 9d is installed downward along the rod body 9a on _two supports 9d ₁ and 9d ₂ coupled to the middle part of the rod body 9a with a gap.

Reflector 9e, the upward installed at an angle of 45 degrees on the support plate 9c _1, to reflect the light image in the horizontal direction (direction of the communicating conduit th dish 2e) in the direction of the camera 9d.

High pressure water system 9f is Yes and coupler 9f ₂ are attached to the upper end portion, detachable high pressure water supply hose 9f ₃ (shared with the bottom pipe cleaning rod) are possible, the support plate 9c ₁ and support _9d 1, 9d ₂ comprising a high-pressure feed water pipe 9f ₁ which is supported by and along the rod body 9a by.

Legs 9g constitutes by attaching a support plate 9c support plate 9c ₁ to two metal plates 9g 1 to droop side by both lateral of the installed injection nozzle 9c ₂ sideways on the lower surface of the _1, 9g ₂ .

  The guide tube 9h can guide a small-diameter in-pipe camera or a high-pressure water supply hose. If sludge adhering to the communication pipe pan cannot be washed with high-pressure water, use a commercially available wire-type pipe washer. By the guide, it is configured to enable more powerful cleaning.

  FIG. 8 shows an auxiliary rod 10 that is connected to the communication tube dish inspection and cleaning rod 9 to constitute a communication tube dish inspection and cleaning jig. FIG. 9 shows the rod body in the upper connecting portion of the auxiliary rod 10. FIG. 10 shows a locking ring in the upper connecting portion of the auxiliary rod 10.

  The auxiliary rod 10 includes a lower connecting portion 10b that is inserted into and connected to an upper connecting portion 9b of the rod main body 9a of the communicating pipe dish inspection and cleaning rod 9 at a lower end portion of the rod main body 10a. An upper connecting portion 10 c for connecting the tool and the common extension rod is provided, and a grip portion 10 d for gripping the auxiliary rod 10 by the manipulator 6 is provided in the intermediate portion.

Lower connection portion 10b is an upper connecting portion insertable thickness to 9b rod body 10a is in the rod body 9a of the communicating pipe th dish inspection cleaning rod 9, the locking to fit the locking pin engaging groove 9b ₁ The pin 10b ₁ is provided with _two screw holes 10b ₂ through which _two connecting screws 9b ₂ that are fastened to the rod body 9a are coupled. The lower connecting portion 10b of the auxiliary rod 10 is connected to the upper connecting portion of the bottom piping cleaning rod, which will be described later, or the upper connecting portion of the bottom piping inspection rod, except for the upper connecting portion 9b of the rod main body 9a of the communicating pipe dish inspection cleaning rod 9. a part or insertable thickness into the insertion hole of the upper connecting portion in the rod body shared extension rod, by providing the engaging pin 10b ₁ that fits in the hand groove of the respective locking pin Kakarigo鉤, the auxiliary The rod can also be used as a common extension rod.

The upper connecting portion 10c includes an insertion hole 10c ₁ to inserting the rod body shared extension rod when connecting by inserting from above the lower end of the shared extension rod to the rod body 10a, provided in the rod body is inserted is a Temizo 10c ₂ of the locking pin Kakarigo鉤L-shaped formed by opening the upper end of the rod main body 10a so as to fit the locking pin is, Temizo of said engaging pin Kakarigo鉤and fitted into 10c ₂ and the locking ring 10c ₃ fitted slidably to the rod main body 10a so as to lock the locking pins to retaining the locking pin is engaged in hook, comprising a compression spring 10c ₅ extruding locking ring 10c ₃ in the direction of Temizo 10c ₂ of the locking pin Kakarigo鉤be interposed between the stop ring 10c ₃ and the flange 10c ₄ formed in the rod body 10a .

Gripping portion 10d penetrates the rod body 10a constituted by an annular rod 10d ₁ square projecting on both sides of the rod body 10a.

Fitting of the locking ring 10c ₃ with respect to the main body rod 10a is retained by engaging the holes _{10c 31} retaining the elongated forming a stop pin 10c ₆ omission was fitted to the main body rod 10a to the locking ring 10c ₃ and then stopped rotating, locking grooves 10c ₃₂ formed in the upper edge of the locking ring 10c ₃ is fitted locking the locking pin engaged with the back of the hook of Temizo 10c ₂ of the locking pin Kakarigo鉤To prevent it from coming off.

The locking ring 10c ₃ is provided with a flange _{10c 33} used (grip) when pressed down by the manipulator against the locking ring 10c ₃ on the pushing force of the compression spring 10c _5.

  FIG. 11 shows a connected state of the upper connecting portion 9 b of the communication pipe eye dish inspection and cleaning rod 9 and the lower connecting portion 10 b of the auxiliary rod 10. This communication pipe inspection / cleaning rod 9 is used by connecting the auxiliary rod 10 in this way.

  FIG. 12 shows the bottom pipe cleaning rod 11 for constituting the bottom pipe cleaning jig. This bottom pipe cleaning rod 11 is installed horizontally on a rod body 11a made of a pipe material, an upper connecting portion 11b for connecting an upper end portion of the rod body 11a to a common extension rod described later, and a lower end portion of the rod body 11a. A high pressure water injection nozzle portion 11c and a grip portion 11d for gripping the bottom pipe cleaning rod 11 by the manipulator 6 are provided in the middle portion of the rod body 11a, and the bottom pipe cleaning rod 11 is raised on the floor at the lower end. The leg part 11e is provided.

  The upper connecting portion 11b is configured in the same manner as the upper connecting portion 10c configured in the auxiliary rod 10 described above.

High pressure water injection nozzle portion 11c is constructed by attaching the injection nozzle 11c ₁ sideways on the leg 11e bound to the lower end of the rod body 11a. Then, they injected into the nozzle 11c _1, to feed water high pressure water hose 9f ₃ similarly to the injection nozzle 9c ₂ of the communicating pipe th dish inspection cleaning rod 9 connected to the coupler 11c _2. Incidentally, the high-pressure water hose 9f ₃ is shared with the perforated plate inspection cleaning rod.

  The grip portion 11d is configured in the same manner as the grip portion 10d configured in the auxiliary rod 10 described above.

Leg 11e is configured by a circular metal plate 11e ₁ of the lower surface to the lower end of the rod body 11a is coupled to a horizontal state.

  FIG. 13 shows a bottom pipe inspection rod 12 for constituting a bottom pipe inspection jig. This bottom piping inspection rod 12 is installed horizontally on the rod main body 12a made of pipe material, the upper connecting portion 12b for connecting the upper end portion of the rod main body 12a to a common extension rod described later, and the lower end portion of the rod main body 12a. A reflecting part 12c and a grip part 12d for gripping the bottom pipe inspection rod 12 by the manipulator 6 are provided in the middle part of the rod body 12a, and the bottom pipe inspection rod 12 is erected on the floor at the lower end. A leg 12e is provided.

  The upper connecting portion 12b is configured in the same manner as the upper connecting portion 10c configured in the auxiliary rod 10 described above.

Reflector portion 12c is constructed by attaching a reflective mirror 12c ₁ is inclined 45 degrees in the upward reflective surface on the leg 12e bound to the lower end of the rod body 12a.

  The grip portion 12d is configured in the same manner as the grip portion 10d configured in the auxiliary rod 10 described above.

The leg portion 12e is configured by a circular metal plate 12e ₁ of the lower surface to the lower end of the rod body 12a is coupled to a horizontal state.

  FIG. 14 shows the common extension rod 13. The common extension rod 13 includes a rod main body 13a made of a pipe material, and an upper connecting portion 13b for connecting an upper end portion of the rod main body 13a to the connecting rod 8b of the crane suspension 8 or another common extension rod similarly configured. And a lower connecting portion 13d provided at the lower end portion of the rod main body 13a, and a gripping portion 13c for gripping the common extension rod 13 by the manipulator 6 at an intermediate portion of the rod main body 13a.

  The upper connecting portion 13b is configured in the same manner as the upper connecting portion 10c configured in the auxiliary rod 10 described above.

  The grip portion 13c is configured in the same manner as the grip portion 10d configured in the auxiliary rod 10 described above.

The lower connecting portion 13d is configured such that the rod main body 13a is connected to the upper connecting portion 9b of the rod main body 9a of the communication pipe dish inspection cleaning rod 9 or the upper connecting portion 10c of the rod main body 10a of the auxiliary rod 10 or the bottom pipe cleaning rod 11. Thickness that can be inserted into the insertion hole of the upper coupling portion in the rod body of the upper coupling portion 11b of the rod main body 11a or the upper coupling portion 12b of the rod main body 12a of the bottom pipe inspection rod 12 or another common extension rod configured similarly. And provided with a locking pin 13d ₁ that fits into the hand groove of each locking pin engagement rod.

  FIGS. 15-18 has shown the connection method of the connection of a crane suspension and an auxiliary rod, the connection of a crane suspension and a common extension rod, or common extension rods. Here, the connection between the crane suspension and the auxiliary rod will be described as an example. The same applies to other connections.

FIG. 15 shows a state in which the connecting rod 8 b of the crane lifting tool 8 is opposed to the upper connecting portion 10 c of the auxiliary rod 10. The manipulator 6 suspends the crane suspension 8 from the suspension hook of the crane 7 and grips the auxiliary rod 10. Connecting rod 8b is is positioned on the center of the insertion hole 10c ₁ of the upper connecting portion 10c, to align the orientation of the locking pin 8c in the direction of Temizo 10c ₂ of the opening of the locking pin Kakarigo鉤.

Figure 16 inserts the connecting rod 8b of the insertion hole 10c ₁ to the crane sling 8 on connecting portion 10c of the auxiliary rod 10 lowers the crane sling 8, the locking pin 8c locking pin Kakarigo鉤It shows a state of being fitted in the Temizo 10c _2. In this state, the locking ring 10c ₃ of the upper connecting portion 10c is a decreasing state by compressing the compression spring 10c ₅ by being pushed downward the engaging pin 8c of the connecting rod 8b.

Figure 17 is a hook of Temizo 10c ₂ of the connecting rod 8b the rotated locking pin 8c of the locking pin Kakarigo鉤on connecting portion 10c of the insertion hole 10c crane hangers 8 which is inserted into the _first auxiliary rods 10 part is moved back while being opposed on the locking groove _{10c 32} of the locking ring 10c _3, and shows a state immediately before the locking ring 10c ₃ is increased by Shinryoku compression spring 10c _5.

FIG. 18 shows a state where the connection of the connecting rod 8b of the crane lifting tool 8 to the upper connecting portion 10c of the auxiliary rod 10 is completed. This condition, hook the Temizo 10c ₂ of the connecting rod 8b the rotated locking pin 8c of the locking pin Kakarigo鉤on connecting portion 10c of the insertion hole 10c crane hangers 8 which is inserted into the _first auxiliary rods 10 part is moved to the back be to face on the locking groove _{10c 32} of the locking ring 10c _3, the locking ring 10c ₃ is raised by Shinryoku compression spring 10c _5, engaging the locking pin 8c it is a state in which retained the locking pin 8c from hook of Temizo 10c ₂ of the locking pin Kakarigo鉤by fitting the groove 10c _32. In addition, although mentioned later for details, after completion | finish of a connection of the crane lifting tool 8 and the auxiliary | assistant rod 10, the communicating pipe dish inspection cleaning rod 9 and the auxiliary | assistant rod 10 are connected by screw connection.

Uncoupling of the crane sling 8 and the auxiliary rod 10, the locking groove locking pin 8c is lowered to the flange 10c ₃₃ of the locking ring 10c ₃ to compress the compression spring 10c ₅ is gripped by the manipulator 6 released from engagement by the 10c _32, by moving the locking pin 8c of the connecting rod 8b to rotate the crane hanger 8 to hook out of Temizo 10c ₂ of the locking pin Kakarigo鉤the auxiliary rods 10 performs connecting rod 8b raising the crane hanger 8 as withdrawn from the insertion holes 10c ₁ of the upper connecting portion 10c.

  The communication pipe inspection and cleaning performed using the above-described jig will be described. This communication pipe eye dish inspection and cleaning is performed by inserting a communication pipe eye dish inspection and cleaning jig configured by connecting the communication pipe eye dish inspection and cleaning rod so as to be positioned at the lowest position into the barrel to be inspected and cleaned. Specifically, the communication pipe eye dish inspection and cleaning jig used for the communication pipe eye dish inspection and cleaning is composed of a crane suspension 8, a communication pipe eye dish inspection and cleaning rod 9, and an auxiliary rod using a manipulator 6 and a crane 7. 10 and the common extension rod 13 are connected.

  FIG. 19 shows a jig assembling operation for connecting the crane lifting tool 8, the communicating tube dish inspection cleaning rod 9, and the auxiliary rod 10.

  In the connecting operation of the crane lifting tool 8 and the auxiliary rod 10 shown in FIG. 5A, the crane lifting tool 8 is suspended from the hanging hook of the crane 7 by the manipulator 6, the auxiliary rod 10 is gripped, and the connecting rod of the crane lifting tool 8 is connected. 8b is inserted into the upper connecting portion 10c of the auxiliary rod 10 and connected.

A communicating pipe th dish inspection cleaning rod 9 shown in (b) in the joining operation of the auxiliary rod 10, the manipulator 6, and connect the high pressure water hose 9f ₃ to the high-pressure water supply line 9f, communicating tube th dish fitted with a camera 9d The inspection and cleaning rod 9 is erected on the floor surface, the connecting body of the crane lifting tool 8 and the auxiliary rod 10 suspended by the crane 7 is lowered, and the lower connecting portion 10b of the auxiliary rod 10 is connected to the communicating pipe dish inspection and cleaning rod 9. It is inserted into the upper connecting portion 9b and screwed.

  In the operation shown in (c), the jig in the middle of assembly is lifted by the crane 7 and moved.

20-24, the jig in the middle of an assembly is lifted with the crane 7, inserted in the barrel 2b to be inspected and cleaned, and the high-pressure water jet nozzle portion 9c and the reflecting mirror 9e of the communicating tube dish inspection and cleaning rod 9 are connected to the communication tube. A jig assembling operation to face the eye plate 2e is shown. Specifically, FIG. 20 (a) shows a state in which the communication pipe eye dish inspection cleaning rod 9 is inserted into the barrel 2b where the stellap 3 is tilted, and FIG. The working state is shown in which the sterlap 3 corresponding to the inserted barrel 2b is erected and the rod body 10a of the auxiliary rod 10 is fitted into the locking groove 3a and the retaining jig 3b is inserted to prevent it from coming off. (A) of FIG. 21 shows a state of being seated lowers the hanging hook of a crane 7 a flange 10c ₄ of the auxiliary rod 10 is interposed a stop jig 3b omission on Suterappu 3, (b), the Suterappu 3 depress the locking ring 10c ₃ of the seated auxiliary rods 10 on shows a state in which disconnect the crane sling 8. FIG. 22 shows a jig assembling operation for connecting the crane suspension 8 and the two common extension rods 13, and (a) shows a connection operation of the crane suspension 8 and the first common extension rod 13. (B) shows the connection work of the 1st common extension rod 13 and the 2nd common extension rod 13, (c) shows the state where the jig in the middle of assembly was lifted. FIG. 23A shows the auxiliary rod 10 of the jig in which the lower connecting portion 13d of the lower shared extension rod 13 of the two shared extension rods 13 suspended by the crane 7 is seated on the sterlap 3. The state connected with the upper connection part 10c is shown, (b) has shown the operation | work which removes the retaining jig 3b interposed between the sterlap 3 and the auxiliary rod 10. FIG. 24, the assembled communication pipe dish inspection and cleaning jig is lifted by the crane 7, and the high pressure water injection nozzle portion 9c of the communication pipe dish inspection and cleaning rod 9 and the reflecting mirror 9e are connected to the communication pipe by tilting the sterlap 3. The state which lowered to the position which opposes the eye plate 2e is shown.

In FIG. 20, insertion of the communication tube dish inspection and cleaning rod 9 into the barrel 2 b shown in FIG. 20A moves so that the communication tube dish inspection and cleaning rod 9 is positioned above the opening of the barrel 2 b after the sterlap 3 is tilted. Then, the hanging hook of the crane 7 is lowered and the communication pipe inspection and cleaning rod 9 is inserted into the barrel 2b. Then, as shown in (b), the sterlap 3 is erected, and the rod body 10a of the auxiliary rod 10 is inserted into the locking groove 3a of the sterlap 3, and is removed between the upper connecting portion 10c of the rod body 10a and the sterlap 3. rod body 10a into the groove 3b ₂ of the retaining jig 3b pledged該抜only stop jig 3b as is fitted, the auxiliary rod 10 to be able to stably seated on Suterappu 3.

In FIG. 21, the seating of the auxiliary rod 10 on the stellap 3 shown in FIG. 21A is performed by lowering the hanging hook of the crane 7 and interposing the hook 10 c ₄ of the auxiliary rod 10 on the stellap 3 with the retaining jig 3 b interposed therebetween. To sit down. Then, (b), the auxiliary rods 10 to the crane sling 8 by pulling rotate the crane hanger 8 in a state of depressing the locking ring 10c ₃ of the auxiliary rod 10 seated on Suterappu 3 Disconnect from.

  The two common extension rods 13 shown in FIG. 22 are connected to each other by suspending the crane suspension 8 from the suspension hook of the crane 7 and holding the first common extension rod 13 by the manipulator 6 as shown in FIG. The upper connecting portion 13 b is connected to the connecting rod 8 b of the crane lifting tool 8. Next, as shown in (b), the upper connecting portion 13b of the second shared extension rod 13 gripped by the manipulator 6 is connected to the lower connecting portion 13d of the first shared extension rod 13 connected to the crane suspension 8. To do. The jig in the middle of assembling is lifted and moved by the crane 7 as shown in (c).

  In the operation of connecting the lower shared extension rod 13 of the two shared extension rods 13 suspended by the crane 7 shown in FIG. 23 and the auxiliary rod 10 of the jig seated on the sterlap 3, As shown, the upper connecting portion 10c of the auxiliary rod 10 of the jig that seats the lower connecting portion 13d of the lower shared extending rod 13 of the two shared extending rods 13 suspended by the crane 7 on the sterlap 3. This is done by moving upward and lowering the suspension hook of the crane 7 to insert the lower connecting portion 13d into the upper connecting portion 10c and rotate it. Then, as shown in (b), the retaining jig 3b interposed between the sterlap 3 and the upper connecting portion 10c of the auxiliary rod 10 is removed by raising the suspension hook of the crane 7.

  The work of making the high-pressure water jet nozzle portion 9c and the reflecting mirror 9e of the communication pipe plate inspection and cleaning rod 9 shown in FIG. 24 face the communication pipe plate 2e is done by tilting the sterlap 3 away from the rod body 10a of the auxiliary rod 10. Retreating from the opening of the barrel 2b and lowering the suspension hook of the crane 7 lowers the communicating pipe dish inspection and cleaning rod 9.

  Then, in the communication pipe dish inspection and cleaning, the clogged state of the communication pipe dish 2e is observed from a video image taken by the camera 9d, and high pressure water is jetted from the high pressure water spray nozzle portion 9c to wash the communication pipe dish 2e. .

  Next, the bottom pipe cleaning of the barrel will be described. This bottom pipe cleaning is performed by inserting a bottom pipe cleaning jig configured by connecting the bottom pipe cleaning rod so as to be positioned at the lowest position into a barrel to be inspected and cleaned. Specifically, the bottom pipe cleaning jig used for this bottom pipe cleaning is configured by connecting a crane suspension 8, a bottom pipe cleaning rod 11, and a common extension rod 13 using a manipulator 6 and a crane 7.

  FIG. 25 shows a jig assembling operation for connecting the crane suspension 8, the bottom pipe cleaning rod 11 and the common extension rod 13, and (a) shows a connection operation of the crane suspension 8 and the common extension rod 13. (B) shows the connection operation | work which connects the bottom piping washing rod 11 under the common extension rod 13, (c) has shown the state which lifted the bottom piping washing jig in the middle of an assembly.

  In the connection work of the crane lifting tool 8 and the common extension rod 13 shown in FIG. 5A, the crane lifting tool 8 is suspended from the suspension hook of the crane 7 by the manipulator 6, and the common extension rod 13 is gripped. The connecting rod 8b is inserted into the upper connecting portion 13b of the common extension rod 13 and connected.

The joining operation of the shared extension rod 13 and the bottom pipe cleaning rod 11 shown in (b), the manipulator 6, is raised bottom pipe cleaning rod 11 connected to high-pressure water hose 9f ₃ to the high-pressure water jetting nozzle portion 11c to the floor Then, the crane suspension 8 suspended by the crane 7 and the joint body of the common extension rod 13 are lowered, and the lower joint portion 13d of the common extension rod 13 is inserted into the upper joint portion 11b of the bottom pipe cleaning rod 11 and connected.

  In the operation shown in (c), a jig in the middle of assembling is lifted by the crane 7 and moved.

26 to 28 show a jig assembly in which a jig in the middle of assembly is lifted by a crane 7 and inserted into a barrel 2b to be inspected and cleaned so that the high-pressure water spray nozzle portion 11c of the bottom pipe cleaning rod 11 faces the bottom pipe 2f. Indicates work. Specifically, FIG. 26A shows a state in which the bottom pipe cleaning rod 11 is inserted into the barrel 2b in which the sterlap 3 is tilted, and FIG. 26B corresponds to the barrel 2b in which the bottom pipe cleaning rod 11 is inserted. It is a front view which shows the operation | working state which raises the sterap 3 to perform, inserts the rod main body 13a of the common extension rod 13 in the latching groove 3a, and inserts the retaining jig 3b. (A) of FIG. 27 shows a state in which the suspension hook of the crane 7 is lowered and the rod 13b ₂ of the common extension rod 13 is seated on the sterlap 3 with the retaining jig 3b interposed, and (b) of FIG. shows a state in which disconnect the crane hanger 8 depress the locking ring 13b ₁ of the shared extension rod 13 which is seated on Suterappu 3. FIG. 28 shows a state in which the assembled bottom pipe cleaning jig is lifted by the crane 7, the suterap 3 is brought down, and the high pressure water injection nozzle part 11 c of the bottom pipe cleaning rod 11 is lowered to a position facing the bottom pipe 2 f. Is shown.

In FIG. 26, insertion of the bottom pipe cleaning rod 11 into the barrel 2 b shown in FIG. 26A moves the bottom pipe cleaning rod 11 so as to be positioned above the opening of the barrel 2 b after the slap 3 is tilted, and the crane 7 is suspended. The hook is lowered and the bottom pipe cleaning rod 11 is inserted into the barrel 2b. Then, as shown in (b), the sterlap 3 is erected, the rod main body 13a of the common extension rod 13 is inserted into the locking groove 3a of the sterlap 3, and the rod main body 13a is interposed between the upper connecting portion 13b and the sterlap 3. rod body 13a into the groove 3b ₂ of the retaining jig 3b pledged該抜only stop jig 3b as is fitted, shared extension rod 13 to be able to stably seated on Suterappu 3.

In FIG. 27, the common extension rod 13 is seated on the stellap 3 shown in FIG. 27A by lowering the suspension hook of the crane 7 and attaching the hook 13 b ₂ of the common extension rod 13 onto the stellap 3. Intervene. Then, (b) as shown in, the shared extended the crane sling 8 by pulling rotate the crane hanger 8 in a state of depressing the locking ring 13b ₁ of the shared extension rod 13 seated on Suterappu 3 Disconnect from the rod 13.

  And although illustration illustration is abbreviate | omitted, it carried out similarly to the jig | tool assembly operation demonstrated with reference to FIG. 22, connected the two shared extension rods 13 to the crane lifting tool 8, and demonstrated with reference to FIG. In the same manner as the jig assembling work, the joint is connected to the common extension rod 13 seated on the sterlap 3, and then the linking body is pulled up and the sterling 3 is lowered in the same manner as described above to lower the linking body. Later, the stairs lap 3 is erected, the uppermost common extension rod 13 is seated on the stairs lap 3, the crane suspension 8 is separated from the common extension rod 13, and two more common extension rods 13 are connected to the stairs lap 3 The bottom pipe cleaning rod 11 was connected to the bottom of the crane suspension 8 via the nine shared extension rods 13 by repeating the operation of connecting to the shared extension rod 13 seated on Constituting part pipe cleaning tool. One of the nine common extension rods uses an auxiliary rod as a common extension rod.

  FIG. 28 shows a state in which the high-pressure water injection nozzle portion 11c of the bottom pipe cleaning rod 11 in the bottom pipe cleaning jig configured as described above is lowered so as to face the bottom pipe 2f of the barrel 2b. In this state, high pressure water is injected from the high pressure water injection nozzle portion 11c to clean the bottom pipe 2f.

Although the bottom pipe inspection of the barrel is omitted in the drawing, the bottom pipe inspection jig in which the bottom pipe inspection rod 12 is connected to the lowest position is assembled in the same manner as the assembly work of the bottom pipe cleaning jig. Then, in the barrel 2b, as shown in FIG. 29, the down hanging the camera along the jig is opposed to the reflecting mirror 12c ₁ of the bottom pipe inspection rod 12, the bottom pipe 2f reflected by the reflecting mirror 12c ₁ Take a light image for observation.

DESCRIPTION OF SYMBOLS 1 ... Cell, 1a, 1b ... Chamber, 1c ... Floor, 1d ... Shielding window, 2 ... Dissolution tank, 2a ... Slab, 2b, 2c ... Barrel, 2d ... Communication pipe, 2e ... Communication pipe plate, 2f ... Bottom piping 2h ... swarf basket, 3 ... sterlap, 3a ... locking groove, 3b ... retaining jig, 4 ... gas piping, 5 ... distributor, 6 ... manipulator, 7 ... crane, 8 ... crane lifting tool, 8b ... connecting rod, 8c ... locking pin, 9 ... communication pipe th dish inspection cleaning rod, 9a ... rod body, 9b ... upper connecting portion, 9b 1 _... locking pin engaging groove, 9b 2 _... coupling screw, 9c ... high pressure water the injection nozzle unit, 9d ... camera, 9e ... reflector, 9f ... high pressure water system, 9 g ... leg, 10 ... auxiliary rods, 10a ... rod body, 10b ... lower connecting portion, 10b 1 _... locking pin, 10c ... upper Connecting part, 10c ₁ ... insertion hole, 10c ₂ ... locking pin engagement Hand groove of scissors, 10c ₃ ... locking ring, 10c ₄ ... scissors, 10c ₅ ... compression spring, 10c ₆ ... retaining pin, 10d ... gripping part, 11 ... bottom pipe cleaning rod, 11a ... rod body, 11b ... top Connecting part, 11c ... High pressure water injection nozzle part, 11d ... Grasping part, 11e ... Leg part, 12 ... Bottom pipe inspection rod, 12a ... Rod body, 12b ... Upper connecting part, 12c ... Reflector part, 12d ... Grasping part, 12e ... Leg part, 13 ... Common extension rod, 13a ... Rod main body, 13b ... Upper connection part, 13c ... Gripping part, 13d ... Lower connection part.

Claims (3)

In the dissolving tank piping cleaning device for cleaning and inspecting the communicating pipe pan and bottom pipe in the barrel and slab constituting the dissolving tank with a jig inserted into the barrel,
The jig includes a crane hanging tool, a high-pressure water spray nozzle and a communication pipe inspection / cleaning rod equipped with a camera, an auxiliary rod screw-coupled to the communication pipe inspection / cleaning rod, and a high-pressure water injection nozzle. A bottom pipe cleaning rod, a bottom pipe inspection rod with a reflector, and a common extension rod,
The communication pipe eye dish inspection and cleaning jig has a configuration in which a plurality of the common extension rods and the auxiliary rod are screw-coupled to the communication pipe eye dish inspection and cleaning rods under the crane suspension,
The bottom pipe cleaning jig has a configuration in which a plurality of the common extension rods and the bottom pipe cleaning rod are connected under the crane suspension,
The bottom pipe inspection jig has a configuration in which a plurality of the common extension rods and a bottom pipe inspection rod are connected to the bottom of the crane suspension. In Claim 1, the means for performing the connection includes a locking pin provided at the lower end of the upper rod to be connected and an upper connection provided at the upper end of the lower rod to be connected.
The upper connecting portion includes an insertion hole for inserting the upper rod, and a hand groove of an L-shaped locking pin engaging rod for engaging and engaging the locking pin of the upper rod inserted into the insertion hole. A latch slidably fitted to the rod so as to lock the locking pin so as to prevent the locking pin engaged with the flange from being fitted into the hand groove of the locking pin engaging rod. A dissolution tank piping cleaning device comprising a stop ring.   3. The locking ring according to claim 2, wherein the locking ring includes a locking groove that engages and locks the locking pin engaged in the back of the hook portion of the hand groove of the locking pin engaging rod to prevent the locking pin from coming off. A dissolution tank piping cleaning device, wherein the rod body is fitted into a state where it is pushed out by a spring so as to abut on a locking pin fitted in a hand groove of an engagement rod.

Images