JPH08238465A - Device for removing deposit in drain pipe - Google Patents

Abstract

PURPOSE: To certainly remove only a deposit without damaging the inner wall surface of a drain pipe by arranging a ball guide member to a holder member so as to hold a guide ball of which the spherical surface slightly protrudes from the leading end of the holder member in a freely rotatable manner on the center line of the holder member. CONSTITUTION: A head member 40 is fixed to the transmission shaft 25 receiving rotation from a second rotary drive source and a holder member 30 having the same center as the head member 40 is integrally connected to the leading end of the head member 40. A ball guide member 32 holding a guide ball 31 in a freely rotatable manner is attached to the holder member 30 on the center line thereof and the guide ball 31 is held in a non-falling off state by attaching a support 33 to the leading end of the ball guide member 32 so that the spherical surface of the leading end thereof can slightly protrude from the leading end of the holder member 30. First cutters 34 are attached to the outer periphery of the holder member 30 in the radial direction from the center of the holder member 30 at an equal interval at six equally divided positions.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an adhering matter removing apparatus for scraping and removing barnacles and other shellfish adhered and proliferated on an inner wall surface of a pipe such as a drainage pipe while self-propelled.

[0002]

2. Description of the Related Art At a nuclear power plant, a thermal power plant, a steel mill, a sewage treatment plant, and the like, which have been in the spotlight in recent years, the wastewater is sufficiently filtered and then discharged to the sea or river. Barnacles and other shellfish wrapped in calcareous shells on the inner wall of the drainage pipe installed for drainage adhere and proliferate, so the inner diameter of the drainage pipe becomes smaller after long use, There is a problem that it is not possible to obtain predetermined drainage specified at the time of design. Therefore, in the past, a diving worker had to enter the drainage pipe to periodically remove the shellfish and use tools to scrape off the shellfish attached to the inner wall surface.

[0003] However, in this method, the diving time of the diving operator is limited, and the fatigue of the operator also increases, and it takes a long time to complete this operation. Moreover, the skill of the diving operator is required, the danger is high, and the operation cost is high. Therefore, as an alternative, an unmanned submersible working vehicle has now been developed to periodically remove the shellfish, which is operated by a ground operator and sent into the drainage pipe, A method of performing the operation of removing the deposit has become common.

[0004] As an unmanned work vehicle that performs such work, there is, for example, one shown in FIGS. 7 and 8. In FIG. 7, reference numeral 101 denotes a self-propelled movable truck for moving in the drain pipe 150. The movable truck 101 is provided with thrust means 102 for propulsion for moving forward or backward. Also, as shown in FIG. 8, attitude control means 103 for controlling the attitude in the circumferential direction under water is attached to both sides of the center line of the movable carriage 101, as shown in FIG. On a plane orthogonal to the plane, the movable carriage 101 rotates around a center line. A large number of brush-shaped scraping rods 104 are mounted on the movable cart 101 at two radial positions to contact with the inner wall surface 151 of the drain pipe 150 and to rotate and scrape off extraneous matter such as shells on the inner wall surface 151. A removal device 122 composed of a rotating plate 105 is provided, and removes deposits with the scraper 104 while moving inside the drainage pipe 150.

[0005]

However, the scraper used in the adhering matter removing device attached to the movable trolley has a particularly strong adhesion and reproductive power among shellfish, and has a calcareous hardness. The bar must be made of a hard material to cope with the removal of barnacles covered with high shells. In some cases, the wall itself may be directly shaved, causing damage to the drain pipe. In order to prevent this, it is necessary for the operator to perform sufficient visual inspection to prevent the brush from coming into contact with the inner wall surface of the drainage pipe, or to leave the shellfish with an appropriate thickness. There is. Furthermore, in order to prevent such damage to the drain pipe, it is necessary to use a scraper having a low hardness, and when such a low hardness material is used, the scraper is significantly consumed. Frequent replacement of scrapers has caused problems such as the inability to remove barnacles and other shellfish.

A first object of the present invention is to solve the above problems and to provide a removing device which has a simple structure and enables stable removal of deposits and has a long life.
An object of the present invention is to provide a removing device capable of reliably removing only the attached matter without damaging the inner wall surface of the drain pipe.

[0007]

SUMMARY OF THE INVENTION A first object of the present invention is to:
A support member rotatably supported by the movable trolley 1 in an attached matter removing device disposed on the self-propelled movable trolley 1 for scraping off the attached matter on the inner wall surface 51 while moving in the drain pipe 50. A head member 40 rotated by a second rotation drive source 24 attached to the support member 21 is provided on the inner wall surface 51 side of the drain pipe 50 of the drain 21, and the holder member 30 is connected to the head member 40 integrally therewith. First and second cutters 34, 41 are attached in series along the axis at equal intervals around the holder member 30 and the head member 40, and further, the holder member 30 is mounted on the holder member 30 at the center line thereof. This is achieved by arranging a ball guide member 32 that rotatably holds a guide ball 31 having a slightly spherical surface protruding from the tip of 30.

[0008] A second object of the present invention is to make the first cutter 34 slightly project from the tip of the holder member 30 at the cutting edge, and to cut the first cutter 3 along the tip of the holder member 30.
This is achieved by inclining the tip edge ridge line of No. 4 toward the apex of the guide ball 31.

[0009]

[Function] The holder member 30 is attached to the inner wall surface 51 of the drainage pipe 50.
When the second rotation drive source 24 is rotated while pressing the guide ball 31 at the tip of the first, the first and second cutters 34, 41
Rotates together with the head member 40 and the holder member 30. As a result, the first and second cutters 34 and 41 scrape off the adhering substances such as barnacles and other shells adhering to the inner wall surface 51 of the drain pipe 50. At this time, with respect to the apex of the spherical surface of the guide ball 31 rotatably held by the ball guide member 32 of the holder member 30,
The ridgeline of the blade tip of the cutter 34 extends at an incline at an upward slope, but since it does not reach the apex of the guide ball 31, a certain gap is generated between the blade tip and the inner wall surface 51 of the drain pipe 50. Therefore, the drainage pipe 50 is not damaged by the first cutter 34.

In this way, while the first and second cutters 34, 41 of the removing device 22 rotate, the entire removing device 22 is also rotated by the supporting member 21 while the supporting member 21 rotates, so that the inner wall surface 51 of the drainage pipe 50. Since the rotating device 1 rotates along with and is moved in the longitudinal direction of the drainage pipe 50 by the moving carriage 1, the removing device 22 spirally rotates, and the shellfish attached to the inner wall surface 51 of the drainage pipe 50 is removed. It

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. In FIG. 5, reference numeral 2 denotes a bogie main body of the movable bogie 1. Three or four legs 10 are respectively connected to the bogie main body 2 by pins of a predetermined amount so as to be able to stand up or down. Wheels 11 are rotatably attached to the ends of the legs 10, and the front and rear legs 10 are pin-connected to each other by a connecting rod 12 so as to be interlockable. Each of the front legs 10 has an opener 1 having one end connected to a first sliding member 3 that reciprocates in the axial direction on the bogie main body 2 of the movable bogie 1.
The first sliding member 3 is reciprocated in the axial direction by a first piston cylinder 14 having one end fixed to the tip of the bogie main body 2 and the other end fixed to the first sliding member 3. Configuration.

On the other hand, a second sliding member 4 similar to the first sliding member 3 is provided at a rear portion on the bogie main body 2, and the rear leg 10 is rotated by the second sliding member 4. It is freely pin-connected. The second sliding member 4 is configured to be axially slid by a second piston cylinder 15 fixed to the bogie main body 2 of the movable trolley 1 and the other end fixed to the second sliding member 4. The leg 10 is integrally driven by the interlocking operation of the first and second piston cylinders 14 and 15 to stand up or fall down.

A first rotary drive source 20 is attached to a rear portion of the bogie main body 2. The rotation of the first rotary drive source 20 is controlled by a power transmission mechanism (not shown) built in the bogie main body 2. The rotation is transmitted to a front wheel 11 via the front wheel 11 and driven. On the other hand, the rotation is also transmitted to a support member 21 rotatably supported at the tip of the bogie main body 2. As shown in FIG. 6, the support member 21 is
The drainage pipe 50 has a link structure in which its tip expands and contracts according to the inner diameter of the drainage pipe 50, and the removing device 22 is fixed to the tip of the support member 21.

As shown in FIG. 4, the removing device 22 has a second rotary drive source 24 fixed to the rear of the connecting portion 23 attached to the support member 21, and transmits the rotation from the second rotary drive source 24. The tip is rotated via a transmission shaft 25 that is driven. A head member 40 is fixed to a transmission shaft 25 receiving rotation from the second rotation drive source 24,
As shown in FIGS. 1 and 2, a holder member 30 having the same center as the head member 40 is integrally connected to the tip of the head member 40. A ball guide member 32 for rotatably holding a guide ball 31 is mounted on the center line of the holder member 30. The guide ball 31 guides the ball so that the spherical surface at the tip can slightly protrude from the tip of the holder member 30. A support 33 is attached to the tip of the member 32 so as to be retained.

As shown in FIGS. 1 and 2, a first cutter 34 is mounted on the outer periphery of the holder member 30 at equal intervals at positions radially divided from the center of the holder member 30 in the radial direction. The first cutter 34 is fitted in a mounting groove 35 cut out on the outer periphery of the holder member 30 and is prevented from coming off in the radial and axial directions by a first fixing ring 36 so as to be mounted.

The tip of the first cutter 34 is a holder member 3
0, the tip end side of the holder member 30 of the first cutter 34 extends toward the guide ball 31 side, as shown in FIG. That is, the first cutter 34 has an inverted L-shape as shown in FIG. Further, the distal end of the first cutter 34 has a structure protruding from the distal end surface of the holder member 30.
The portion of the cutter 34 extending toward the guide ball 31 is inclined at an angle θ at an angle θ with respect to a line perpendicular to the center line extension of the holder member 30 toward the vertex of the guide ball 31. Extending.

Further, a first outer peripheral side of the holder member 30 is provided.
A second cutter 41 is arranged on each of the cutters 34 in series with the cutter 34, and the second cutter 41 is
It is fitted in a fitting groove 42 that is cut at equal intervals around zero. The second cutter 41 is attached to the front and rear second fixing rings 43 so as to be prevented from coming off.

For this reason, as shown in FIG. 5, the self-propelled movable carriage 1 enters the drainage pipe 50, and extends the support member 21 in advance according to the inner diameter of the drainage pipe 50 so that the tip of the removal device 22 is removed. Is located along the inner wall surface 51 of the drain pipe 50. Thereafter, when the first rotation drive source 20 is driven, the movable carriage 1 starts moving, and at the same time, the support member 21 also rotates. Further, subsequently, the second rotation drive source 24 also starts driving, and the holder member 30 of the removing device 22
Rotates in the direction shown in FIG.
4, 41 are also rotated. By this rotation, the drain pipe 5
The shells adhering to 0 are scraped off by the first and second cutters 34, 41.

At this time, since the movable carriage 1 also advances gradually while the support member 21 rotates, the guide ball 31 moves along the inner wall surface 51 of the drainage pipe 50, so that the first and second cutters 34 and 41 are moved. The orbiter revolves while rotating, and the removing device 22 scrapes off the shellfish while moving in a spiral shape. By this operation, the shells adhering to the drain pipe 50 are scraped to the closest position without the first cutter 34 touching the inner wall surface 51 of the drain pipe 50, so that the drain pipe 50 may be damaged. Absent.

In this embodiment, the movement of the movable carriage 1 while the removing device 22 revolves is performed by the holder member 3 while the removing device 22 revolves around the carriage main body 2 of the moving carriage 1.
By setting the speed to move by half the rotational diameter of the first and second cutters 34 and 41 attached to the head member 40 and the head member 40, an accurate and stable scraping operation can be obtained, and no scraping unevenness occurs. .

In this embodiment, the center line of the holder member 30 and the center line of the head member 40 are set to be on the same line with respect to the center line L in the diameter direction of the drain pipe 50.
Since the edge line of the cutting edge of the cutter 34 has an ascending angle of an angle θ toward the vertex of the guide ball 31, instead of this, as shown in FIG. Thus, the deviation of the center line H connecting the holder member 30 and the head member 40 can be inclined by an allowable range of the angle α. That is, since the rotation center of the support member 21 can be displaced from the center of the drainage pipe 50 by an amount corresponding to the angle α, even if the drainage pipe 50 is deformed, this can be sufficiently dealt with, and the drainage pipe 50 can be accommodated. It can be scraped with almost no remains of shellfish attached to 50.

[0022]

As is apparent from the above-described embodiments, the present invention moves the inside of the drainage pipe 50 and the inner wall surface 51.
An adhering matter removing device disposed on a self-propelled movable carriage 1 for scraping off adhering matter adhered to the inner wall surface 51 side of the drain pipe 50 of a support member 21 rotatably supported by the movable carriage 1. A head member 40 that is rotated by the second rotation drive source 24 attached to the member 21 is provided, and a holder member 30 is integrally connected to the head member 40, and the holder member 30 and the head member 40 are surrounded by the head member 40. The first and second cutters 34 and 41 are arranged in series along the axis at intervals.
And a ball guide member 32 for rotatably holding a guide ball 31 having a slightly spherical surface projecting from the tip of the holder member 30 on the center line of the holder member 30.

For this reason, the hardness of the cutter can be set freely and a long-life cutter can be provided irrespective of the hardness, adhesion and fertility of barnacles and other shellfish. In addition, since the guide ball of the removal device moves along the inner wall surface of the drainage pipe, the corrosion-resistant coating film used for this drainage pipe and the inner wall surface of the drainage pipe itself are scraped to form a drainage pipe. In addition, there is no generation of scratches, and it is not necessary for the worker to visually monitor. Further, by making the material of the cutter high in hardness, the life of the entire removing device is prolonged and the number of consumable parts is reduced, so that the cost required for the scraping operation is reduced and the maintenance cost is reduced.

Further, according to the present invention, the tip of the cutting edge of the first cutter 34 slightly projects from the tip of the holder member 30, and the first cutter 34 extends along the tip of the holder member 30.
Since the ridgeline of the cutting edge extends obliquely toward the vertex of the guide ball 31, shells such as barnacles can be scraped off at the position closest to the inner wall surface of the drain pipe, and a removal device excellent in workability. Can be provided. In addition, a unique effect is obtained, such as being able to sufficiently cope with deformation of the drainage pipe and displacement between the drainage pipe and the removing device.

[Brief description of drawings]

FIG. 1 is a sectional front view showing a main part of the present invention.

FIG. 2 is a plan view of FIG.

FIG. 3 is an enlarged sectional front view showing a modified use example of the present invention.

FIG. 4 is a partial sectional front view showing a driving structure of the removing device.

FIG. 5 is an overall front view showing an example of use in the drainage pipe of the present invention.

FIG. 6 is an enlarged side view of FIG. 5 showing the relationship between the removing device and the support member.

FIG. 7 is a front view of the entire appearance showing a conventional example.

FIG. 8 is a side view showing a working state of a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Mobile bogie 2 Bogie main body 3 1st sliding member 4 2nd sliding member 10 Legs 11 Wheel 12 Connecting rod 13 Opener 14 1st piston cylinder 15 2nd piston cylinder 20 1st rotation drive source 21 Supporting member 22 Removal device 23 Connection part 24 Second rotary drive source 25 Transmission shaft 30 Holder member 31 Guide ball 32 Ball guide member 33 Support 34 First cutter 35 Mounting groove 36 First fixing ring 40 Head member 41 Second cutter 42 Fitting groove 43 Second fixing ring 50 drainage pipe 51 inner wall surface

Claims (2)

[Claims] 1. An adhering matter removing device disposed on a self-propelled moving carriage 1 for scraping off adhering matter adhering to an inner wall surface 51 while moving inside a drain pipe 50, and is rotatably supported by the moving carriage 1. A head member 40 rotated by a second rotation drive source 24 attached to the support member 21 is provided on the inner wall surface 51 side of the drain pipe 50 of the support member 21, and the holder member 30 is integrated with the head member 40. And the first and second cutters 34, 42 are connected in series along the axis at equal intervals around the holder member 30 and the head member 40, respectively.
A ball guide member 3 for holding a guide ball 31 having a slightly spherical surface protruding from the tip of the holder member 30 on the center line of the holder member 30 in a rotatable manner.
The apparatus for removing deposits in a drainage pipe, characterized in that 2 is arranged. 2. The first cutter has a tip edge slightly protruding from the tip of the holder member 30, and a tip edge ridge line of the first cutter 34 along the tip of the holder member 30 corresponds to a vertex of the guide ball 31. 2. The apparatus for removing deposits in a drain pipe according to claim 1, wherein the apparatus is inclined toward the surface.