JPH07113434B2 - Hose guide device - Google Patents

Description

The present invention relates to a hose guide device for guiding the insertion and removal of a flexible hose, and more particularly to a flexible hose connected to an underwater agitation extraction pump. TECHNICAL FIELD The present invention relates to a hose guide device suitable for guiding in and out of a flexible hose.

(Prior Art) The problem of storage and treatment of waste sludge such as waste sludge and waste resin is an important issue in various industrial fields. Particularly in the nuclear industry, since advanced water purification treatment is performed, a large amount of waste sludge such as used filter material and ion exchange resin is generated as waste. Waste sludge generated in a nuclear power plant is radioactive waste, so it is more difficult to handle than waste sludge generated in other industrial fields, and there is a high degree of reliability in the treatment facility for slurry-like waste sludge and its operation method. Is required.

Waste sludge, which is radioactive waste from a nuclear power plant, is stored in a waste sludge storage tank by sedimentation for a certain period of time in order to attenuate its radioactivity, and then discharged from this storage tank. It is sent to the sludge receiving tank, waste sludge (concentrated waste liquid) discharge tank, etc. After that, the waste sludge is sent to a drying volume reduction / solidification device and solidified. BACKGROUND ART Underwater agitation extraction pumps have been used in recent years to extract waste sludges to be treated from waste treatment tanks such as waste sludge storage tanks.

In this case, it is necessary to move the submersible agitation pump into and out of the waste treatment tank, and this pump loading / unloading operation is performed by remote control in order to prevent radiation exposure. Further, since the submersible agitation extraction pump is taken in and out of the waste treatment tank, the pump outlet pipe uses a flexible pressure resistant flexible hose having a length longer than that of the waste treatment tank.

In order to smoothly move this submersible stirring / extracting pump into / out of the waste treatment tank, be sure to prevent the flexible hose from becoming entangled or caught, and follow the submersible stirring / extracting pump's insertion / extraction of the flexible hose. Need to move.

Conventionally, a flexible hose is generally put in and taken out by a manual method or a simple hose reel method.

(Problems to be Solved by the Invention) When handling radioactive waste, which is waste sludge from a nuclear power plant, when the flexible hose is taken in and out manually, there is a risk of radiation exposure. When a simple hose reel system is adopted, a flexible hose that is pressure resistant and flexible has flexibility for that purpose, but the rigidity is larger than that of an ordinary flexible hose and the bending radius of curvature is large. In addition, there is a problem that it is difficult or impossible to wind the hose reel.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a hose guide device that can smoothly and smoothly guide the insertion and removal of a flexible hose without manual labor.

Another object of the present invention is to move the flexible hose following the movement of a connected device such as a submersible stirring / extracting pump without confusion,
An object is to provide a hose guide device that is stable and can be put in and taken out smoothly.

[Structure of Invention]

(Means for Solving Problems) A hose guide device according to the present invention is a hose guide device for guiding the insertion and removal of a flexible hose into and from a tank such as a waste treatment tank. To the fixed guide mechanism, a movable guide mechanism that can move back and forth toward the fixed guide mechanism, a guide rail assembly that guides the forward and backward movement of the movable guide mechanism, and the fixed guide mechanism and the movable guide mechanism. And a flexible hose tensioning mechanism for stretching the flexible hose. The flexible hose is configured to be introduced into the tank from the fixed side through the movable guide mechanism and the fixed guide mechanism.

(Operation) In this hose guide device, the movable guide mechanism is guided by the guide rail assembly so as to be movable back and forth on the fixed guide mechanism, and the flexible hose fixed on the fixed side is moved from the movable guide mechanism to the fixed guide mechanism. The flexible hose is guided in and out of a tank such as a waste treatment tank, and in this state, the movable guide mechanism is moved back and forth to the fixed guide mechanism so that the flexible hose can be taken in and out of the tank.

When the flexible hose is taken in and out of the tank, the flexible hose is stretched by the hose tensioning mechanism and guided without slack or confusion between the fixed guide mechanism and the movable guide mechanism, and it is flexible. The sex hose can be taken in and out smoothly and smoothly.

(Embodiment) An embodiment of the hose guide device according to the present invention will be described below with reference to the accompanying drawings.

In FIG. 1, reference numeral 10 indicates a hose guide device according to the present invention, and the hose guide device 10 is provided above a waste sludge storage tank 11 as a waste treatment tank, for example. The waste sludge storage tank 11 is stored in a tank room 12 of a building such as a nuclear reactor complex building, and waste sludge 13 such as waste sludge and waste resin is stored therein as radioactive waste.

The upper portion of the waste sludge storage tank 11 is covered with a tank lid 14 to have a closed structure. The tank top lid 14 is provided with an opening 15 through which an underwater agitation extraction pump 16 is put in and taken out. The submersible stirring extraction pump 16 is an electric chain block that is fixed to the ceiling wall 17 of the tank chamber 12 and serves as a lifting device.
It is hung up and down in 18 via a hanging chain.

A tip of a flexible pressure resistant flexible hose 20 is connected to the submersible stirring / extracting pump 16, and the flexible hose 20 is guided by the hose guide device 10 to be moved following the submersible stirring / extracting pump 16.

The hose guide device 10 has a frame-structured guide rail assembly 22 supported via a support member 21 fixed to a ceiling wall 17 of a tank chamber 12. The guide rail assembly 22 has a fixed guide mechanism 23 and a movable guide mechanism.
24 are provided. The fixed guide mechanism 23 is positioned above the opening of the waste sludge storage tank 11, and the movable guide mechanism 24 is supported toward the fixed guide mechanism 23 so as to be movable back and forth.

The movable guide mechanism 24 has a semicircular roller box 25 as shown in FIG. 2 and FIG.
A large number of guide rollers 26 are arranged in a semicircular arc shape and rotatably arranged within 25 to form a semicircular arc guide roller row.
The radius of curvature of the guide roller row is appropriately determined in consideration of the minimum bending curvature of the flexible hose, and the flexible hose 20 is wound from the radial outside of the guide roller row.

Rolling rollers 27, 27 are provided outside the both side walls of the roller box 25 of the movable guide mechanism 24 so as to be able to roll back and forth. The rolling rollers 27, 27 are rotatably engaged with a horizontally loaded guide rail 28 of the guide rail assembly 22 to guide the movement of the movable guide mechanism 24. Reference numeral 29 is a roller for guiding the movement of the movable guide mechanism 24 along the guide rail 28.

On the other hand, the fixed guide mechanism 23 has a 1/4 arc-shaped roller box 30 as shown in FIGS. 4 and 5, and a plurality of guide rollers 31 are arranged in the roller box 30 in a 1/4 arc shape. Thus, a guide roller row is formed, and the flexible hose 20 is guided on the guide roller row. The guided flexible hose 20 is pressed by pressing rollers 32, 32 which are spaced apart in the circumferential direction. A pair of draining rollers 33, 33 such as a sponge roller is disposed on the outlet side of the flexible hose 20 of the fixed guide mechanism 23, and the flexible hose 20 is passed between the draining rollers 33, 33 and the tip thereof is It is connected to a submersible stirring extraction pump 16.

The rear end side of the flexible hose 20 is fixed by a hose fixing band 35 and connected to a fixed hose (pipe) via a coupling (not shown). The hose fixing band 35 is attached to the guide rail assembly 22 on the fixed guide mechanism 23 side.

The flexible hose 20 whose one side is fixed to the hose fixing band 35 is wound around the semi-arcuate guide roller row of the movable guide mechanism 24 in the counterclockwise direction and turned over, and then the fixed guide mechanism 23. And is connected to an underwater stirring extraction pump 16.

At this time, the flexible hose 20 is tensioned by the hose tensioning device 37 so that the flexible hose 20 wound between the fixed guide mechanism 23 and the movable guide mechanism 24 is not loosened or bent. It is stretched to the state. As shown in FIG. 2, the hose tensioning device 37 is a balancer tensioner 37 provided at the rear of the guide rail assembly 22, and is connected to the roller box 25 of the movable guide mechanism 24 via a cable 38, so that the movable guide mechanism For example, a tension of 50 to 60 kg is applied in a direction in which the fixed guide mechanism 23 is retracted from the fixed guide mechanism 23.

By the way, the submersible agitation extraction pump 16 is provided with a terminal box 40 as shown in FIG. 1, and a power and signal cable 41 is connected to the terminal box 40 via a cable fixing band 42. The power and signal cables 41 are connected to the cable winding mechanism 45 via the guide rollers 44 of the cable guide mechanism 43, and are wound around the cable reel 46 of the cable winding mechanism 45.

The cable guide mechanism 43 and the cable winding mechanism 45 are fixed to the ceiling wall 17 of the tank chamber 12 together with the guide rail assembly 22. The power cable 41 fed out from the cable winding mechanism 45 supplies electric power necessary to drive the pump motor (not shown) of the submersible agitation extraction pump 16, while driving the pump motor or the like is performed from the signal cable 41. It is controlled by the control signal sent. Cable guide mechanism 43
Also a pair of draining rollers 47,47 such as sponge rollers
Are provided, and the water draining rollers 47, 47 prevent the water drops attached to the power and signal cables 41 from falling.

Further, a pump suspension piece 49 is attached to the submersible agitation extraction pump 16, and the tip of the measurement wire 50 is attached to the pump suspension piece 49. The measuring wire 50 is connected to the wire winding mechanism 53 via the guide sheave 52 of the wire guide mechanism 51, and is wound around the wire winding reel 54. A measurement box 55 is provided in the wire winding mechanism 53, and a depth gauge or the like is housed in the measurement box 55, and the hanging position of the submersible stirring extraction pump 16 is measured from the winding amount of the wire winding reel 54. It

Next, the operation of the hose guide device 10 will be described.

The first step of extracting the waste sludges 13 settled and stored in the waste sludge storage tank 11 is to use the submersible stirring extraction pump 16 with the electric chain block 18 to remove the waste sludge storage tank 11.
It is hung down through the opening 15 and the underwater stirring extraction pump 16 is hung down to the position of the waste sludges 13.

As the submersible stirring / extracting pump 16 is lifted, the movable guide mechanism 24 of the hose guide device 10 is moved by its own weight.
Is guided by the guide rail 28 of the guide rail assembly 22 and moved toward the fixed guide mechanism 23, and the flexible hose 20 is pulled out from the hose guide device 10. At that time, the movable guide mechanism 24 can smoothly follow the movement of the flexible hose 20 that is pressure resistant,
The guide roller row is arranged in a semicircular shape having a minimum radius of curvature of the flexible hose 20 or more. At this time, the power and signal cables 41 are also pulled out following the downward movement of the submersible agitation extraction pump 16. The suspended position of the submersible agitation extraction pump 16 due to the downward movement is measured by a depth gauge via the measurement cable 50.

Thereafter, the submerged agitation extraction pump 16 was driven to agitate the waste sludges 13 stored in the waste sludge storage tank 11, while the agitated waste sludges 13 were extracted by a pumping action and extracted. The waste sludges 13 are transferred to a next processing device (not shown) provided outside the tank chamber 12 by a pressure-resistant flexible flexible hose 20 connected to a submersible stirring extraction pump 16 and processed.

The submerged agitation extraction pump 16 is lifted above the waste sludges 13 in order to protect the pump function when the transfer of the waste sludges 13 for one day is completed.

The pulling operation of the submersible stirring / withdrawing pump 16 is performed by operating the electric chain block 18, and the submersible stirring / withdrawing pump 16 is pulled up by the operation of the electric chain block 18. The flexible hose 20 and the power and signal cables 41 are pulled up following the pulling up of the submersible stirring / extracting pump 16. When the flexible hose 20 and the power and signal cables 41 are pulled up, water is removed by the water draining rollers 33 and 47 so that water droplets attached to the hoses and cables do not drip onto the tank upper lid 14. .

By lifting the submersible stirring extraction pump 16, the flexible hose
When 20 is pulled up, the movable guide mechanism 24 of the hose guide device 10 is retracted from the fixed guide mechanism 23 by the tension of the hose tensioning mechanism 37. This hose tensioning mechanism
By the 37, the flexible hose 20 which is stretched around the fixed guide mechanism 23 and the movable guide mechanism 24 is always stretched in a tension state in which it does not sag or bend.

In this way, the flexible hose 20 is moved in accordance with the elevation of the submersible agitation extraction pump 16, and the flexible hose 20 at this time has a free length equal to or greater than the depth of the waste sludge storage tank 11. I have to prepare. From this relationship, the maximum movement stroke amount of the movable guide mechanism 24 of the hose guide device 10 that guides the loading and unloading of the flexible hose 20 is appropriately set according to the depth of the waste sludge storage tank 11, and the guide rails are accordingly set. The guide rail length of the assembly 22 is defined.

Further, the fixed guide mechanism 24 for guiding the taking in and out of the flexible hose 20 has a 1/4 arc-shaped guide roller row and a pressing roller 32, and the flexible hose 20 is sandwiched and guided between them. Therefore, the flexible hose 20 is not disengaged from the fixed guide mechanism 23 even when the submerged agitation extraction pump 16 is pulled out and moves upward, and is stably guided.

In one embodiment of the present invention, the hose guide device guides the insertion and removal of a pressure-resistant flexible flexible hose for connecting a submersible agitation extraction pump used in a waste sludge storage tank of a radioactive waste treatment facility. Although an example has been described, the hose guide device can also be applied to the insertion and removal of general flexible hoses other than the pressure resistant flexible flexible hose.

In the embodiment of the present invention, the guide rail assembly, the cable winding mechanism, the wire winding machine and the like are fixed to the ceiling wall of the tank chamber, but these are the crane girder of the overhead crane and the waste sludge storage tank. It may be attached to the tank upper lid.

Further, in the embodiment of the present invention, the flexible wire is wound around the movable guide mechanism from the fixed side in the counterclockwise direction, but the flexible wire is wound around the movable guide mechanism in the clockwise direction. You may do it. In this case, the fixed guide mechanism is installed below by the diameter of the roller box of the movable guide mechanism.

〔The invention's effect〕

As described above, the hose guide device according to the present invention,
Since the movable guide mechanism is provided in the fixed guide mechanism so as to be able to move back and forth, and the hose tensioning mechanism for tensioning the flexible hose wound around the fixed guide mechanism and the movable guide mechanism is provided, the flexible hose is manually operated. Instead, it is smoothly and smoothly guided into and out of the tank without sagging or bending.

Further, since the flexible hose is always pulled in and out in a tensioned state, the flexible hose does not get tangled or get caught and can be moved stably following the movement of the connected equipment such as the submersible stirring extraction pump.

[Brief description of drawings]

FIG. 1 is a view showing an embodiment of a hose guide device according to the present invention, FIGS. 2 and 3 are side views and plan views showing a movable guide mechanism of the hose guide device, FIGS. 4 and 5 [Fig. 3] is a side view and a plan view showing a fixed guide mechanism portion of the hose guide device. 10 …… Hose guide device, 11 …… Waste sludge storage tank, 12 …… Tank chamber, 13 …… Waste sludge, 14 …… Tank top, 15 …… Opening, 16 …… Underwater agitation extraction pump, 17…
… Ceiling wall, 18 …… Electric chain block (elevator), 20
...... Flexible hose, 22 …… Guide rail assembly,
23 …… Fixed guide mechanism, 24 …… Movable guide mechanism, 25,30
...... Roller box, 26,31 …… Guide roller, 27 ……
Rolling roller, 28 …… Guide rail, 32 …… Pressing roller,
33,47 …… Draining roller, 35 …… Hose fixing band, 37
...... Hose tensioning device, 41 …… Power and signal cables, 43 …… Cable guide mechanism, 45 …… Cable winding mechanism, 50 …… Measuring wire, 51 …… Wire guide mechanism, 53
...... Wire winding mechanism.

Claims (6)

[Claims] 1. A hose guide device for guiding a flexible hose in and out of a waste treatment tank or the like,
A fixed guide mechanism that guides the flexible hose into the container, a movable guide mechanism that can move back and forth toward the fixed guide mechanism, a guide rail assembly that guides the forward and backward movement of the movable guide mechanism, and the fixed guide. Mechanism and a hose stretching mechanism for stretching a flexible hose wound around the movable guide mechanism, and the flexible hose is introduced into the tank from the fixed side through the movable guide mechanism and the fixed guide mechanism. A hose guide device having the above structure. 2. A submersible stirring / extracting pump is connected to the tip of the flexible hose, and the stirring / extracting pump is hung up and down by an elevating device such as an electric chain block. Hose guide device. 3. A fixed guide mechanism and a movable guide mechanism are supported by a guide rail assembly, and the guide rail assembly is provided in a tank chamber accommodating a tank, an overhead crane or a tank upper lid via a support member. The hose guide device according to item 1. 4. The fixed guide mechanism according to claim 1, wherein the fixed guide mechanism includes guide roller rows arranged in a 1/4 arc shape, and the movable guide mechanism includes guide roller rows arranged in a semi-arc shape. Hose guide device described. 5. A drainage roller such as a sponge roller which forms a pair on the outlet side of the fixed guide mechanism, and a flexible hose is guided between the drainage rollers, according to claim 1 or 4. Hose guide device. 6. The hose guide device according to claim 1, wherein the hose tensioning mechanism is a balancer tensioner that applies tensioning force in a direction to retract the movable guide mechanism from the fixed guide mechanism.