JP2000325905A - Apparatus for cleaning can - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make an apparatus compact by smoothing the expansion/ contraction movement of a lance and preventing erroneous actions. SOLUTION: An apparatus for cleaning a can comprises a nozzle 23 for ejecting high pressure water, cylinders 1, 3, 5 which can relatively move in the axial direction, screw parts 13, 13L, 13R, 15, 15L, 15R which are disposed axially among cylinders and arranged at positions symmetrical to the axes of the cylinders, and nuts 14, 14L, 14R, 16, 16L, 16R engaging with the screw parts. Each screw part is unable to be axially symmetrical to the outside cylinder, each nut is engaged with the outside cylinder and has feed screw mechanisms 11 which move the inside cylinder axially relatively to the outside cylinder by rotation and rotate so that axially relative movement speeds among cylinders are made approximately equal, a rotary transmission mechanism 17 which transmits, rotation by a rotation driving means, the rotation of the rotation driving mechanism to each feed screw mechanism to rotate the screw parts at symmetrical positions reversely to each other, and a feed hose 25 which is connected to the innermost cylinder and leads high pressure water to the nozzle.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a can body cleaning apparatus for cleaning the inside of a can body such as a polymerization can or a reaction can, and more particularly to a nozzle moving mechanism.

[0002]

2. Description of the Related Art In a can body cleaning apparatus for cleaning the inside of a can body such as a polymerization can, a reaction can and a fermentation tank used in a chemical, petroleum, or chemical factory, a nozzle is used to clean every corner of the can. It is necessary to wash while moving. As such a nozzle moving mechanism, a can body cleaning apparatus having a hydraulic cylinder type lance in which a cylinder attached with the nozzle expands and contracts only by the water pressure of the cleaning liquid, and a can body cleaning apparatus having a single-stage screw type lance are generally used. Is known.

As shown in FIG. 6, in a cleaning device of a hydraulic cylinder type lance, a piston 201 having a nozzle 205 mounted therein is movable in an axial direction in a cylinder 203, and a cleaning liquid is supplied from the rod cover 207 side of the cylinder 203 to the cleaning liquid. Is introduced to fill the inside of the cylinder 203 with the cleaning liquid, whereby the cleaning liquid is supplied to the nozzle 205 and jetted. The movement of the piston 201 is performed by opening and closing operations of a V1 valve and a V2 valve provided in a flow path between the cleaning liquid tank and the upper part of the cylinder. That is, FIG.
As shown in (a), with the cleaning liquid being introduced from the rod cover 207 side, the V1 valve is opened, the V2 valve is closed, and the cleaning liquid is sent from the tank to the upper part of the piston. At this time, the pressing force on the upper surface of the piston is larger than the pressing force on the lower surface by the integral of the cross section of the rod.
01 extends downward, whereby the nozzle 205 moves downward.

Conversely, as shown in FIG. 6 (b), when the V1 valve is closed and the V2 valve is opened, the cleaning liquid at the top of the piston flows out of the cylinder. When the pressure exceeds the pressure, the piston 201 contracts and the nozzle 205 moves upward.

The moving speed of the piston 201 is adjusted by adjusting the flow rate adjusting valves N1 and N2 provided in the flow path of the washing liquid.
It is performed by When the flow rate control valves N1 and N2 are throttled, the flow rate of the cleaning liquid flowing into and out of the upper portion of the cylinder per unit time decreases, so that the moving speed of the piston 201 decreases. Conversely, when the flow rate control valves N1 and N2 are opened, the piston 201 moves. Movement speed becomes faster.

On the other hand, the single-stage screw-type lance moves and rotates the nozzle simultaneously by moving the one-stage lance up and down.

As shown in FIG. 7 (a), the supply hose feed mechanism of these conventional can body cleaning apparatuses winds a supply hose 325 around a hose reel 307, and
25 is connected to the inner lance 305 via a guide roller 329 fixedly arranged outside the structure of the cleaning device. In such a conventional can body cleaning apparatus, when the inner lance 305 is moved downward in the axial direction to insert the nozzle into the polymerization can, the supply hose 325 is connected to the inner lance 305 as shown in FIG. It is necessary to feed by the hose reel 307 by a length equal to the moving distance of the 305.

[0008]

Such a conventional body cleaning apparatus having a telescopic lance is capable of expanding and contracting the lance, so that it can be reduced in size and can wash the inside of polymerization cans of various sizes. However, there are the following problems.

First, in a hydraulic cylinder type lance can body cleaning apparatus, since the expansion and contraction control of the lance (piston) is performed by switching the opening and closing operation of the valve, the number of components of the hydraulic circuit increases, and the control method becomes complicated. . For this reason, there is a problem that a malfunction of the valve easily occurs during the cleaning operation, and a stable cleaning operation cannot be performed.

In particular, when the cleaning liquid has a high pressure of, for example, 50 MPa or more, there is a risk that the cleaning liquid leaks from the valve, the pressure seal member is worn, and the valve is damaged. Further, since high pressure is applied to each part of the lance, there is a risk of damage to the device itself and early wear. For this reason, such a hydraulic cylinder type lance can body cleaning device has a problem that it is necessary to take measures against high pressure, such as increasing the size of the device itself and increasing the thickness of each part, and measures against increasing the pressure of the valve. is there.

Further, since the control of the expansion / contraction speed of the lance is performed by adjusting the flow rate of the cleaning liquid by narrowing down the flow rate control valve, it is difficult to control at a very low speed even if the control can be performed roughly. For this reason, there is a problem that the fluctuation of the expansion / contraction speed is apt to occur, which causes uneven cleaning.

On the other hand, in the single-stage screw-type lance can cleaning device, the lance cannot be sufficiently extended depending on the size of the polymerization can because the lance is a single-stage type. There is a problem that it becomes impossible.

In order to reduce the size of the apparatus, there is an apparatus that moves a nozzle by extending and retracting a multi-stage lance. However, when a plurality of drive sources are used to cause a plurality of lances to move in the axial direction, the device becomes rather large. In particular, when the multi-stage lance is extended to the maximum length, the length of the hose for supplying high-pressure water becomes longer by that amount, so that a hose reel for winding the hose is required.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and it is a main object of the present invention to provide a can body cleaning apparatus capable of easily performing nozzle cleaning control and performing a stable cleaning operation. Another object of the present invention is to provide a can body cleaning apparatus that can easily adjust the moving speed of the nozzle and can obtain a uniform cleaning effect. Another object of the present invention is to provide a can body cleaning apparatus that can prevent failure and damage even when a high-pressure cleaning liquid is used. It is another object of the present invention to provide a can body cleaning apparatus that can be mounted on tanks of various sizes. Another object of the present invention is to provide a can body cleaning device capable of reducing the size of the device.

[0015]

Means for Solving the Problems In order to achieve the above object, the invention according to claim 1 comprises a nozzle for injecting high-pressure water, a rotation driving means, a moving mechanism for vertically moving the nozzle, and a nozzle. A supply means for supplying high-pressure water, wherein the moving mechanism is coaxially arranged in a nested structure, a plurality of cylinders that can move relative to each other in the axial direction, and a space between the plurality of cylinders. Is disposed interposed in the axial direction,
A plurality of feed screw mechanisms for axially moving the inner cylinder relative to the outer cylinder by rotation, and a rotation transmission mechanism for transmitting rotation by a rotation drive unit to each of the plurality of feed screw mechanisms. Wherein the nozzle is mounted on the tip of the innermost cylinder.

The present invention is a can body cleaning apparatus having a moving mechanism for moving a nozzle by expansion and contraction of a so-called multi-stage lance using a plurality of cylinders which are coaxially arranged in a nested structure and which can move relative to each other in the axial direction. That is, the plurality of cylindrical bodies of the present invention constitute a so-called telescopic lance, and the axial length becomes short when the multiple-stage lance, that is, the plurality of cylindrical bodies is most contracted, so that a large-sized tank is used. It is possible to apply the present invention to various tanks down to small size tanks. In the present invention, a multi-stage type may be used by using a plurality of cylinders, and the number of stages such as a two-stage type and a three-stage type is not limited.

In the present invention, in order to move the nozzle,
The rotation driving means is driven, and the rotation is transmitted to a plurality of feed screw mechanisms by a rotation transmission mechanism to rotate each feed screw mechanism. Each feed screw mechanism is interposed and arranged in the axial direction between the plurality of cylinders, and moves the inner cylinder relative to the outer cylinder by rotation in the axial direction. Here, the “inner cylinder” refers to the cylinder closest to the axis of the cylinder from the position of the feed screw mechanism, and the “outer cylinder” refers to the shaft from the position of the feed screw mechanism. The cylinder located closest to the heart in the opposite direction. Therefore, the rotation of the feed screw mechanism causes the respective inner cylinders to simultaneously move relative to the outer cylinders in the axial direction, whereby the plurality of cylinders expand and contract. And since a nozzle is attached to the innermost cylinder of these several cylinders, a nozzle moves up and down by expansion-contraction operation of several cylinders.

In the present invention, the movement of the nozzle is performed only by the driving of the rotation driving means, the rotation transmitting mechanism, the feed screw mechanism, and the expansion / contraction operation of the plurality of cylinders. The direction of movement of the nozzle is also determined by the direction of rotation of the feed screw mechanism, that is, the direction of rotation of the rotary drive means. In other words,
In the present invention, the conventional hydraulic cylinder which requires switching of the valve when raising and lowering the nozzle, because the supply means of the cleaning liquid and the moving mechanism of the nozzle are independent of each other and the pressure of the cleaning liquid is not used for moving the nozzle. The hydraulic circuit of the supply means can be simplified as compared with the can body cleaning device of the lance type.
For this reason, it is possible to perform a stable cleaning operation without causing malfunction of the hydraulic circuit or the like.

Further, in the present invention, the supply means such as a hydraulic circuit and the moving mechanism of the nozzle are independent, so that even when high-pressure water of 50 MPa or more is used, the cylinder is not affected by the weight due to the high-pressure water pressure. I do not receive. For this reason, conventional hydraulic cylinder-type lance cans that are affected by the pressure of high-pressure water do not cause problems such as influence on the cylinder body due to the load from the high-pressure water, leakage from the valve, and wear of the pressure seal member. In comparison with a body washing device, damage to device parts such as a valve, a nozzle or a cylinder can be prevented, and the device can withstand high pressure. Also, leakage may occur from the high-pressure hose. In this case, only the high-pressure hose needs to be changed, so that it is possible to easily cope with ultra-high pressure.

Further, according to the present invention, the rotation of the rotation driving means is transmitted to the feed screw mechanism by the rotation transmission mechanism, and the cylinder moves relative to the axial direction by the rotation of the feed screw mechanism.
By adjusting the rotation speed of the rotation drive means, it is possible to adjust the speed of the axial movement of each cylinder (that is, the movement speed of the nozzle). As a result, fine adjustment of the nozzle moving speed can be easily performed as compared with the conventional hydraulic cylinder type lance can body cleaning device which controls the moving speed of the nozzle by controlling the flow rate of the cleaning liquid, and the cleaning unevenness due to the malfunction of the moving speed adjustment. And a uniform cleaning effect can be obtained.

In the present invention, since the feed screw mechanism is interposed between the respective cylinders, the feed screw mechanism is isolated from the gas in the innermost cylinder. Therefore, there is no need to limit the material of the feed screw mechanism in consideration of the contact between the feed screw mechanism and the gas. For example, it is possible to use a steel material as a material of the feed screw mechanism, and further use a lubricating oil to smooth the operation of the feed screw mechanism.

Further, since the feed screw mechanism is interposed only between the cylinders, the outer surface of the apparatus can be constituted only by the cylinders. That is, since there is no need to expose a complicated mechanism such as a feed screw mechanism outside the structure, gas leakage from unnecessary gaps can be prevented.

In the present invention, since the rotation of the feed screw mechanism is transmitted from one rotation drive unit by the rotation transmission mechanism, a plurality of cylinders can be simultaneously axially moved relative to each other by the common rotation drive unit. For this reason, it is not necessary to provide a rotation drive unit for each cylinder, and the apparatus can be made compact.

As the rotation driving means of the present invention, a fluid pressure motor may be used in addition to the electric motor. In this case, the working fluid may be a pneumatic pressure, a hydraulic pressure, or a liquid of the cleaning high-pressure water itself. Pressure can also be used.

The configuration of the rotation transmitting mechanism of the present invention is not particularly limited as long as the rotation of the rotation driving means is transmitted to a plurality of feed screw mechanisms. For example, a plurality of gears, keys, and the like may be provided as a rotation transmission mechanism to transmit the rotation of a motor as rotation driving means to a feed screw mechanism. At this time, in order to finely adjust the moving speed of the cylinder, that is, the moving speed of the nozzle, a rotation speed adjusting mechanism may be provided in the rotation transmitting mechanism. As such a rotational speed adjusting mechanism, for example, a multi-stage transmission, a continuously variable transmission,
Examples include a fluid pressure flow control valve device, an inverter motor, a servomotor, and the like.

The plurality of feed screw mechanisms may be provided so as to be axially interposed between the plurality of cylinders and move the inner cylinder relative to the outer cylinder by rotation in the axial direction. The configuration is not limited in the present invention.

In the present invention, a position control means for positioning and adjusting the position of the nozzle can be further provided. In the present invention, the nozzle movement is not performed by switching the pressure or the valve of the high-pressure water but by the rotary driving means, so that the nozzle displacement is not likely to occur, but by controlling the rotary driving means, the nozzle positioning and position adjustment can be further performed. It is easy to perform it accurately and reliably. Such position control means includes positioning control by an encoder, nozzle position adjustment by a timer control, and the like.

According to a second aspect of the present invention, in the can body cleaning device according to the first aspect, the plurality of feed screw mechanisms are respectively arranged at positions symmetrical with respect to the axis of the cylindrical body. It is composed of a screw portion and a nut screwed to each screw portion, each of the screw portions is not movable relative to the outer cylinder in the axial direction, and each of the nuts is engaged with the inner cylinder. Yes,
The rotation transmission mechanism transmits the rotation such that the screw portions at the symmetric positions are rotated in opposite directions.

In the present invention, each of the plurality of feed screw mechanisms comprises a plurality of screw portions and a nut screwed to each screw portion. Each of the screw portions cannot move relative to the outer cylinder in the axial direction, and the nut screwed to the screw portion is engaged with the inner cylinder. For this reason, when the screw part rotates, the nut screwed to the screw part moves up and down on the screw part peripheral surface by the rotation. Alternatively, as the nut rotates, the nut moves up and down on the peripheral surface of the screw portion. Here, since the nut is engaged with the inner cylinder, the inner cylinder moves axially relative to the outer cylinder as the nut moves up and down. In addition, since such a plurality of screw portions are arranged at positions symmetrical with respect to the axis of the cylinder, it assists in guiding the movement of the cylinder in the axial direction, so that the cylinder can smoothly expand and contract. Operation will be performed.

Further, the respective screw portions are arranged at positions symmetrical to each other with respect to the axis of the cylindrical body, and the rotation transmitted by the rotation transmitting mechanism acts on the respective screw portions in directions opposite to each other.
The force exerted by the rotation is canceled between the screw portions at the symmetrical positions, and unnecessary twisting of the structure of the device is prevented, and stable operation is ensured.

According to the present invention, the rotation transmission mechanism can be configured to transmit the rotation of the rotation drive means to a plurality of screw portions, to the plurality of nuts, or to use a cylindrical body. It is optional to configure so as to separately transmit to the screw portion and the nut. As described above, in the present invention, since rotation is transmitted to the plurality of screw portions or the nuts by the rotation transmission mechanism, the rotation of each screw portion or the nut can be shared by one rotation driving unit, and each of them can be shared. It is not necessary to provide separate rotation driving means, and the device can be made compact.

According to a third aspect of the present invention, in the can body cleaning apparatus according to the first or second aspect, a supply hose for connecting the supply means and an innermost cylinder and guiding high-pressure water to a nozzle is provided. Guide means for returning a supply hose from the supply means to the nozzle and guiding the supply hose to the nozzle, wherein the guide means is fixed to an outermost cylinder which is axially movable with respect to the apparatus structure, and The transmission mechanism and the plurality of feed screw mechanisms are characterized in that each of the plurality of cylinders rotates so that an axial relative movement speed with respect to an adjacent cylinder is substantially equal. .

In the present invention, the supply hose is connected to the innermost cylinder. Therefore, when the cylinder moves vertically in the axial direction, the supply hose also moves up and down following the movement.

On the other hand, in the present invention, there is provided guide means for guiding the supply hose back from the supply means to the nozzle, and the guide means is fixed to a cylindrical body movable in the axial direction with respect to the apparatus structure. I have. Here, "device structure"
Includes a cylinder that cannot move in the axial direction. Further, the "outermost cylinder that is axially movable with respect to the apparatus structure" refers to the outermost cylinder that is axially movable with the vertical movement of the nozzle, and is fixed to the apparatus structure. This does not include a cylinder that cannot be moved in the axial direction or an innermost cylinder that can be moved in the axial direction but is provided with the nozzle. For this reason, the guide means moves up and down following the axial movement of the cylindrical body. For this reason, the folded back portion of the supply hose also moves following the movement of the outermost cylinder that is axially movable while maintaining its shape.

Here, in order to move the nozzle up and down, it is necessary to move a plurality of cylinders relative to each other in the axial direction by a rotation transmitting mechanism and a plurality of feed screw mechanisms. The feed screw mechanism rotates each of the plurality of cylinders so that the relative movement speed in the axial direction with respect to the adjacent cylinder is substantially equal. Here, "so that the relative movement speed in the axial direction with respect to the adjacent cylinder is substantially equal" means that the relative movement speed of the inner cylinder with respect to the outer cylinder of the feed screw mechanism is further reduced by the outer cylinder. It means that it is equal to the relative moving speed with respect to the outer cylinder or the difference from the relative moving speed is within a predetermined error range. For this reason,
The relative movement distance in the axial direction between the cylinders is substantially the same for each cylinder. In other words, the moving distance of the supply hose is always substantially equal to the distance obtained by multiplying the relative moving distance of each cylinder by the number of cylinders.

As described above, the supply hose moves up and down at a constant relative movement speed and a constant movement distance, and the folded portion of the supply hose follows the axial movement of the outermost cylindrical body movable in the axial direction. Since the nozzle moves up and down, even when the nozzle moves up and down due to the axial movement of the plurality of cylinders, the curved shape of the folded portion of the supply hose is maintained. For this reason, the length of the supply hose is required to be a fixed length, and it is not necessary to extend the supply hose and to shorten it by rewinding the supply hose by moving the cylinder in the axial direction. Therefore, a hose reel for feeding and unwinding the supply hose is not required, and the entire apparatus can be downsized as compared with a conventional can body cleaning apparatus requiring such a hose reel.

The configuration of the guide means of the present invention is not particularly limited as long as the supply hose is folded back from the supply means and guided to the nozzle, and is fixed to the outermost cylinder which is axially movable with respect to the apparatus structure. Not something. For example, using a disk-shaped guide roller provided with a guide means in a cylindrical body movable in the axial direction with respect to the apparatus structure, a supply hose is wound around the guide roller and folded, and the supply hose is folded and bent. A portion may be formed, and the supply hose may be guided to the nozzle by a plurality of spherical rolls on the cylindrical body below the folded portion.

The structure of the rotation transmitting mechanism and the feed screw mechanism of the present invention is not particularly limited as long as they rotate so that the relative moving speed in the axial direction between the respective cylinders becomes substantially equal. For example, the screw pitch of the feed screw mechanism is changed for each feed screw mechanism, or a combination of a feed screw having a different diameter and a gear having a different number of teeth inside the rotation transmission mechanism is used to make the relative movement speed between adjacent cylinders substantially equal. It can be configured as follows.

[0039]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view showing the overall configuration of a polymerization can cleaning apparatus according to the present embodiment, FIG. 2 is a view taken along the line AA, and FIG. FIG. 4 is a cross-sectional view when the cleaning device is viewed.

The apparatus for cleaning a polymerization can according to this embodiment is for cleaning the inside of the polymerization can. As shown in FIG. 1, a cleaning nozzle 23 for injecting high-pressure water, and a vertically moving nozzle 23 for moving the cleaning nozzle 23 are provided. Fixed lance 1, first lance 3 and second lance 5, first trapezoidal screws 13L and 13R, first nuts 14L and 14R, second trapezoidal screws 15L and 15R, and second nut 16L for extending and retracting each lance. , 16R
And an electric motor 7 as a rotation driving means of the present invention, first trapezoidal screws 13L, 13R, and second trapezoidal screws 15L, 15
R and the gears 21LA, 2 for transmitting the rotation of the electric motor 7 to the
1LB, 21LC, 21RA, 21RB, 21RC, 2
It roughly comprises a rotation transmission box 17 containing 1 RD and 19 and a supply hose 25 for guiding high-pressure water to the nozzle 23.

Here, the fixed lance 1, the first lance 3, and the second lance 5 constitute a plurality of cylindrical bodies of the present invention, and include the first trapezoidal screws 13L, 13R, the first nuts 14L, 14R, and the second trapezoid. Screws 15L, 15R and second nuts 16L, 16R
Constitutes a plurality of feed screw mechanisms of the present invention, and the rotation transmission box 17 and each gear in the rotation transmission box 17 constitute a rotation transmission mechanism of the present invention.

In the present embodiment, the inside of the polymerization vessel is cleaned, but the inside of the reaction vessel and the like may be cleaned.

The fixed lance 1 is fixed to the upper surface 10a of the structure and the lower surface 10b of the structure, so that it cannot move in the axial direction. For this reason, the fixed lance 1 forms a part of the structure of the apparatus. No member such as a feed screw mechanism is provided on the outer surface of the fixed lance 1. Further, as shown in FIG. 2, the first lance 3 is exposed from a part of the front wall surface and the back wall surface of the fixed lance 1 in order to enable a feeding operation of a supply hose 25 described later.

An electric motor 7 is provided outside the apparatus. As shown in FIG. 3, a square shaft 9 extending in the axial direction is provided in a gap between the first lance 3 and the second lance 5. The angular shaft 9 is configured to be rotatable about its axis, and is further movable vertically in the axial direction. The drive shaft of the motor 7 and the square shaft 9 are connected by a roller chain 37 via a gear 39 with a square hole.
It is transmitted to and rotated. The second lance 5 is movable on the square shaft 9, so that the square shaft 9 does not hinder the vertical movement of the second lance 5.

The first lance 3 is arranged coaxially inside the fixed lance 1, and the second lance 5 is further arranged coaxially inside the first lance 3 to have a nested structure. The first lance 3 is movable relative to the fixed lance 1 and the second lance 5 in the axial direction, and the second lance 5 is movable relative to the first lance 3 in the axial direction.

The upper part of the first lance 3 is the rotation transmission box 1
7. For this reason, the first lance 3 moves in the axial direction with the vertical movement of the rotation transmission box 17.

A cleaning nozzle 23 is provided at the lower end of the second lance 5.
The supply hose 25 is connected to the upper end by a connection fitting 33. That is, the high-pressure water supply unit 35
Is supplied from the cleaning nozzle 23 through the supply hose 25 and the second lance 5.

Also, the second lance 5 and the second nut 16L,
16R is fixed at the upper end of the second lance 5 via a connection fitting 33. Therefore, the second trapezoidal screws 15L, 15L
When R rotates and the second nuts 16L and 16R move up and down on the peripheral surface of the second trapezoidal screw, the second lance 5 also moves up and down in the axial direction.

The rotation transmission box 17 includes a gear 19 connected to the square shaft 9 and the gear 19 shown in FIGS.
, Three gears 21LA, 21LB, and 21LC meshing with each other for transmitting the rotation of the motor 7 to the second trapezoidal screw 15L and the first nut 14L on the left side, and the second trapezoidal screw 15R and the first nut 14R on the right side of FIG. Gears 21RD, 21R meshing with each other to transmit the rotation of the motor 7 to the
A total of eight gears A, 21RB and 21RC are provided.

The gear 21LB is a second trapezoidal screw 1 shown in FIG.
The gear 21LC is meshed with the first nut 14L on the left side in FIG. Further, the gear 21RB is connected to the axis of the second trapezoidal screw 15R on the right side in the figure,
The RC meshes with the first nut 14R on the right side in the figure. Therefore, for example, when the angular shaft 9 rotates clockwise in FIG. 2 by driving the motor 7, the gears 19 and 21L
A, 21LB causes the left second trapezoidal screw 15L to rotate clockwise, and the gear 21LC causes the left first nut 14L to rotate clockwise. On the other hand, on the right side, the gear 21RD is provided one extra from the left side, so that the gears 19, 21R
D, 21RA, 21RB, right second trapezoidal screw 15R
Is rotated counterclockwise, and the first right nut 14R is further rotated counterclockwise by the gear 21RC. Thus, the left and right first nuts 14R and 14L and the second trapezoidal screws 15R and 15
The rotation of the motor 7 is transmitted so that L rotates simultaneously in opposite directions.

The moving speed of the nozzle 23, that is, the second lance 5
Is performed by controlling the rotation speed of the motor 7 from the drive shaft. More specifically, the rotation of the drive shaft 7 may be transmitted to another gear by using the gear 19 as a multi-stage gear.

The first trapezoidal screws 13R, 13L and the first nuts 14R, 14L screwed to the same constitute the thread portion of the present invention. The first trapezoidal screws 13R and 13L are connected to the first lance 3
Two are provided in the gap between the lance 1 and the fixed lance 1 in the axial direction. Each of the two first trapezoidal screws 13L and 13R is arranged at an angular interval of 180 degrees with respect to the axis of the first lance 3. That is, two first trapezoidal screws 1 on the left and right
3L and 13R are arranged at positions symmetrical about the first lance axis. In FIG. 1, the right first trapezoidal screw 13R has a left-hand thread, and the left first trapezoidal screw 13L has a thread opposite to the right-hand thread. The screw pitches of the left and right first trapezoidal screws are the same.

Each of the first trapezoidal screws 13L, 13R extends in the axial direction inside the structure, and the upper end thereof is formed on the upper surface 10a of the structure.
The lower ends are fixed to the lower surface 10b of the structure. For this reason, each of the first trapezoidal screws 13L and 13R cannot move relative to the fixed lance 1 and cannot rotate.

The first nuts 14L, 14R screwed to the first trapezoidal screws 13L, 13R are respectively connected to the rotation transmission box 1
7 are arranged inside. Also, each first nut 14L,
14R is the gear 21LC, 21 in the rotation transmission box 17.
Each is engaged with RC. For this reason, the left first nut 1
The rotation of the electric motor 7 is transmitted to the 4L via the gears 19, 21LA, 21LB, and 21LC in this order, and
Gears 19, 21RD, 21RA, 21 are provided on the nut 14R.
The rotation of the electric motor 7 is transmitted through the RB and 21RC in this order. Here, since the first trapezoidal screws 13L and 13R are both fixed to the structure and cannot rotate and cannot move up and down, the first nuts 14R and 14L rotate while rotating on the peripheral surfaces of the first trapezoidal screws 13R and 13L. , And the rotation transmission box 17 also moves up and down inside the structure.

The second trapezoidal screws 15L and 15R and the second nuts 16L and 16R respectively screwed thereto form a screw portion of the present invention. The second trapezoidal screw 15 is connected to the second lance 5 and the first
Two are provided in the gap with the lance 3 in the axial direction.
Like the trapezoidal screws 13L and 13R, they are arranged symmetrically at an angular interval of 180 degrees about the axis of the second lance 5 with respect to each other.

As described above, in the polymerization can cleaning apparatus of the present embodiment, the first trapezoidal screws 13R and 13L are connected to the fixed lance 1 and the first
Since the second trapezoidal screws 15R and 15L are interposed only between the first lance 3 and the second lance 5 between the lances 3, most of the outer surface of the device can be constituted only by the fixed lance 1,
Since there is no need to expose a complicated mechanism to the outside of the structure, gas leakage from unnecessary gaps is prevented.

The first trapezoidal screws 13L, 13R and the second
The trapezoidal screws 15L and 15R are isolated from the gas inside the can. For this reason, since it is not necessary to limit the material of each trapezoidal screw and each nut in consideration of contact with gas, a steel material is used for each trapezoidal screw and each nut. Also, lubricating oil is used for the rotating parts of each trapezoidal screw and each nut.

Each of the second trapezoidal screws is rotatable relative to the structure in opposite directions about the axial direction. Each of the two second trapezoidal screws 15L and 15R has a right-hand second trapezoidal screw 15R and a left-hand second trapezoidal screw 15L in FIG. Note that the screw pitches of the left and right second trapezoidal screws 15L and 15R are the same.

The upper portions of the second trapezoidal screws 15L and 15R are connected to the gears 21LB and 21RB of the rotation transmission box 17, respectively. Therefore, the left second trapezoidal screw 15
L rotates by transmitting the rotation of the electric motor 7 through the gears 19, 21LA, and 21LB in this order. Also the second on the right
The trapezoidal screw 15R is used for the gears 19, 21RD, 21RA, 2
The rotation of the electric motor 7 is transmitted through 1 RB in this order, and the electric motor 7 rotates. Each of the second trapezoidal screws 15L and 15R moves vertically inside the structure together with the rotation transmission box 17 in the axial direction.

The second nuts 16L, 16R screwed to the respective second trapezoidal screws 15L, 15R are fixed to the connection fitting 33 at the upper end of the second lance 5. For this reason, each of the second trapezoidal screws 15L and 15R rotates to rotate the second nuts 16L and 16R.
Moves up and down on the circumference of the second trapezoidal screw.
The lance 5 also moves up and down inside the structure.

As described above, the left and right first trapezoidal screws 13L, 1L
Since the 3R and the left and right second trapezoidal screws 15L and 15R are arranged at positions symmetrical with respect to the lance axis, the axial movement of the first lance 3 and the second lance 5 is guided, and The first lance 3 and the second lance 5 smoothly expand and contract.

The left and right first nuts 14L and 14R respectively rotate on the first trapezoidal screw in opposite directions, and the two left and right second trapezoidal screws 15L and 15R also rotate in opposite directions. Unnecessary twisting does not occur, and the nozzle can be stably raised and lowered.

The diameter ratio between the first trapezoidal screws 13L, 13R and the second trapezoidal screws 15L, 15R, the first nuts 14L, 14R
The diameter ratio and the gear ratio of the gears 21LB and 21RB are 6: 4. On the other hand, the first trapezoidal screw 13L, 1
The screw pitch ratio between the 3R and the second trapezoidal screws 15L and 15R is also 6: 4. Therefore, the first nuts 14L, 14
The axial relative movement speed of the R with respect to the fixed lance is equal to the second nuts 16L, 1L screwed to the second trapezoidal screws 15L, 15R.
6R becomes equal to the axial relative movement speed with respect to the first lance. In other words, the relative speed of vertical movement of the first lance 3 with respect to the fixed lance and the relative speed of axial movement of the second lance 5 with respect to the first lance 3 are equal. Direction distance is the first
This is twice the axial movement distance of the lance from the device structure.

One end of the supply hose 25 is connected to a high-pressure water supply section 35.
And the other end is connected to the second lance 5. That is, as shown in FIG. 3, the supply hose 25 extending upward from the high-pressure water supply unit 35 is fixed to the structure lower surface 10b of the cleaning device by a hose fixing unit 27 in the middle thereof. The supply hose 25 is folded obliquely upward and downward of the cleaning device main body, and the folded portion 31 has a curved shape (hereinafter, the folded portion is referred to as a folded curved portion 31). The folded supply hose 25 is
Furthermore, the first lance 3 is connected via a rotation transmission box inside the structure.
The hose is guided to the inside of the premises by a hose guide 29 fixed thereto, and the end of the hose is connected to the second lance 5 by a hose connection fitting 33.

The supply hose 25 is provided in the hose guide 29.
And a plurality of spherical rollers 29a that rotate as the supply hose 25 moves up and down. The rollers 29a move the supply hose 25 up and down smoothly and guide the supply hose to the second lance 5, and together with the hose guide 29, constitute a guide means of the present invention.

Here, since the leading end of the supply hose 25 is connected to the second lance 5, the supply hose 25 also moves up and down as the second lance 5 moves up and down. On the other hand, since the hose guide 29 is fixed to the first lance 3 via the rotation transmission box 17, the hose guide 29 also moves up and down as the first lance 3 moves up and down. Here, as described above, since the moving distance of the second lance 5 is almost twice as long as the moving distance of the first lance 3, when the nozzle 23 is moved up and down, it follows the vertical movement of the second lance. The supply hose also moves. However, since the hose guide 29 is fixed to the first lance 3, the folded back portion 31 moves the nozzle 23, that is, the half distance of the movement distance of the second lance 5 to the first lance 3.
It moves with the movement of the lance 3. For this reason, the folded back portion 31 moves up and down while maintaining its shape, and the length of the supply hose 25 can be a fixed length, and there is no need to feed out or rewind the hose. Therefore, there is no need to provide a hose reel, and the apparatus can be made compact.

In this embodiment, a plurality of small-diameter rollers 29a as shown in FIG. 3 are used as guide means, but as shown in FIG. 5, a large-diameter roller fixed to the first lance 3 or the rotation transmission box is used. Using the roller 29b as a guide means, the large-diameter roller 29b turns
And the supply hose 25 may be introduced into the second lance 5.

In the polymerization can cleaning apparatus of the present embodiment thus configured, the movement of the cleaning nozzle 23 is performed as follows.

First, when the electric motor 7 is driven, the square shaft 9 also rotates about the axis. Assuming that the angular shaft 9 rotates clockwise, the rotation of the angular shaft 9 is transmitted in the order of the gears 19, 21LA, 21LB, and 21LC as described above, and the left first nut 14L and the left second trapezoidal screw shown in FIG. 15L is rotated clockwise. On the other hand, the rotation of the square shaft 9 is controlled by the gears 19, 21RA, 21RD, 21R.
B, 21RC transmitted in the order of the first right nut 14R
And the right second trapezoidal screw 15R are rotated counterclockwise.

The lowering operation of the left trapezoidal screw and nut and each lance will be described below. The description of the right trapezoidal screw and nut will be omitted because it differs only in that the rotation directions of the left trapezoidal screw and nut are opposite.

Since the first nut 14L is screwed to the first trapezoidal screw 13L, when the first nut 14L rotates clockwise, it descends while rotating on the peripheral surface of the first trapezoidal screw 13L. The first nut 14L is provided in the rotation transmission box 17, and the upper end of the first lance 3 is locked with the rotation transmission box 17, so that the first lance 3 is also lowered with the lowering of the first nut 14L. .

On the other hand, at the same time, the second trapezoidal screw 15L also rotates clockwise as described above. Since the upper end of the second trapezoidal screw 15L is connected to each of the gears 21LB of the rotation transmission box 17, the second trapezoidal screw 15L also descends while rotating as the rotation transmission box 17 descends. Since the second nut 16L is screwed to the second trapezoidal screw 15L and fixed to the second lance 5, the rotation of the second trapezoidal screw 15L causes the second nut 16L to move down along the second trapezoidal screw 15L. With this, the second lance 5 is also lowered.

As described above, the first lance 3 and the second lance 5 perform the descending operation. The feeding operation of the supply hose 25 in this case will be described with reference to FIG. FIG. 4A shows a state before the nozzle 23 starts descending, and FIG.
Indicates a state in which the first lance 3 and the second lance 5 extend the nozzle 23 to the maximum and the nozzle 23 reaches the lowermost position.

As described above, the first lance 3 of the second lance 5
Relative to the fixed lance 1 of the first lance 3
The moving distance of the second lance 5 with respect to the fixed lance 1 is almost twice as long as the moving distance of the first lance 3 with respect to the fixed lance 1 during the lowering operation of the cleaning nozzle 23. Has become. Therefore, as shown in FIG. 4B, when the nozzle 23 moves down to the lowest position and the second lance 5 moves a distance 2L,
The first lance 3 has moved the distance L. For this reason, the tip of the supply hose 25 moves a distance 2L following the second lance 5, but the hose guide 29 moves to the first lance 3
Move a distance L. For this reason,
The folded portion 31 also moves by the distance L, and descends while maintaining its shape.

In the cleaning apparatus for a polymerization can according to the present embodiment, 2
The lance is expanded and contracted in a stepped manner, but by adding a lance and a trapezoidal screw and nut, etc.
You may make it expand and contract in three or more stages, such as a stage.

In the apparatus for cleaning a polymerization can according to the present embodiment,
Although a trapezoidal screw and a nut screwed to the trapezoidal screw are used as the feed screw mechanism, the effect of the present invention can be achieved even if the lance is extended and retracted using a ball screw mechanism. That is, when the ball screw mechanism is used, the first
The first screw rod is used instead of the trapezoidal screws 13L and 13R,
A second screw rod is used instead of the trapezoidal screws 15L and 15R. A second nut screwed into the first screw rod via a bearing instead of the first nut is replaced with a second nut instead of the second nut.
A second nut screwed into the threaded rod and the bearing is used.

[0077]

As described above, according to the first aspect of the present invention, there are provided a plurality of cylinders in which a nozzle moving mechanism is coaxially arranged in a nested structure and which can move relative to each other in the axial direction. A plurality of feed screw mechanisms interposed in the axial direction between the plurality of feed screw mechanisms, and a plurality of feed screw mechanisms for axially moving the inner cylinder relative to the outer cylinder by rotation; Since it has a rotation transmission mechanism for transmitting each, the nozzle movement can be realized only by the rotation drive means, the rotation transmission mechanism and the feed screw mechanism, and stable cleaning without causing malfunction of the hydraulic circuit etc. There is an effect that work can be performed.

Further, the moving speed of the nozzle is controlled by a rotational driving means,
Adjustment can be performed with only a plurality of feed screw mechanisms, and fine adjustment of the moving speed can be easily performed, thereby providing an effect that a uniform cleaning effect can be obtained.

Further, even when ultra-high pressure water is used, no load is applied to the device parts such as valves and cylinders by pressure, and damage to the device parts can be prevented. There is an effect that it is possible to easily cope with a high pressure.

Further, in the present invention, since the feed screw mechanism is interposed between the cylinders, it is possible to sufficiently secure gas tightness. Further, there is an effect that the material of the feed screw mechanism can be freely selected, a lubricant can be used, and a smooth nozzle raising / lowering operation can be performed.

In the present invention, the expansion and contraction operation of a plurality of cylinders can be shared by a single rotation driving means, so that there is an effect that the apparatus can be made compact.

According to a second aspect of the present invention, the plurality of feed screw mechanisms each include a plurality of screw portions disposed at positions symmetrical with respect to the axis of the cylinder and a nut screwed to each screw portion. Wherein each of the screw portions is axially infeasible with respect to the outer cylinder, each of the nuts is engaged with the inner cylinder, and the rotation transmitting mechanism is provided with a screw at the symmetric position. Since the rotation is transmitted so as to rotate the parts in opposite directions, the plurality of screw parts assist in guiding the axial movement of the cylinder, and the cylinder can smoothly expand and contract. This has the effect. Further, the present invention has an effect that a stable operation can be guaranteed by preventing unnecessary twisting of the structure of the device.

According to a third aspect of the present invention, there is provided a supply hose for connecting the supply means to the innermost cylindrical body, for guiding high-pressure water to a nozzle, and for returning the supply hose from the supply means to the nozzle. And a guide unit, wherein the guide unit is fixed to an outermost cylinder that is axially movable with respect to the apparatus structure, and the rotation transmitting mechanism and the plurality of feed screw mechanisms are Are rotated so that their axial relative movement speeds with respect to the adjacent cylinders are substantially equal. As a result, the guide means moves up and down following the axial movement of the cylinders. The portion also moves up and down with the axial movement of the tubular body while maintaining the folded shape, so that the hose length of the supply hose can always be kept constant. For this reason, there is an effect that a hose reel becomes unnecessary and the apparatus can be made compact.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a schematic configuration of a moving mechanism of a polymerization can cleaning apparatus according to the present embodiment.

FIG. 2 is a view on arrow AA in the polymerization can cleaning apparatus of FIG.

FIG. 3 is a cross-sectional view of the polymerization can cleaning apparatus according to the present embodiment as viewed from the side in FIG.

FIG. 4 is a schematic diagram showing a feeding state of a supply hose of the present embodiment. FIG. 4A is a schematic diagram illustrating a state before the start of nozzle lowering, and FIG. 4B is a schematic diagram illustrating a state in which the nozzle is lowered to the lowest position.

FIG. 5 is a schematic view showing another example of the hose guide of the present embodiment.

FIG. 6 is a schematic configuration diagram of a moving mechanism of a can body cleaning device of a hydraulic cylinder type lance as a conventional example. FIG. 6 (a)
FIG. 6B is a state diagram when the lance is extended, and FIG. 6B is a state diagram when the lance is contracted.

FIG. 7 is a schematic view showing a feeding state of a supply hose in a conventional can body cleaning apparatus. FIG. 7A is a schematic diagram illustrating a state before the nozzle descent starts, and FIG. 7B is a schematic diagram illustrating a state in which the nozzle is lowered to the lowest position.

[Explanation of symbols]

 1,301: Fixed lance (structure) 3,303: First lance (outside lance) 5,305: Second lance (inside lance) 7: Electric motor 9: Square shaft 10a: Structure upper surface 10b: Structure lower surface 13L: Left side 1st trapezoid screw 13R: right 1st trapezoid screw 14L: left 1st nut 14R: right 1st nut 15L: left 2nd trapezoid screw 15R: right 2nd trapezoid screw 16L: left 2nd nut 16R: right 2nd nut 17 : Rotation transmission box 19: Square hole gear 21LA, 21LB, 21LC: Gear 21RA, 21RB, 21RC, 21RD: Gear 23: Cleaning nozzle 25, 325: Supply hose 27: Supply hose fixing part 29, 329: Hose guide 29a : Roller 29b: large-diameter roller (hose guide) 31: folded back portion 33: connection fitting 35: high-pressure water Feeding portion 37: roller chain 39: square hole having gear 201: Piston 203: Cylinder 205: cleaning nozzle 207: rod cover 301: Fixed Lance 307: Hose Reel

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Takashi Takeuchi 2410 Motoe, Uozu City, Toyama Prefecture Inside Suginoma Shin Co., Ltd. (72) Inventor Yukiaki Nagata 2410 Motoe Uozu City, Toyama Prefecture Sinoma Co., Ltd. F-term (reference) 3B116 AA33 AB51 BB43 BB54 BB55 BB62 CD41

Claims (3)

[Claims] 1. A can body cleaning apparatus comprising: a nozzle for injecting high-pressure water; a rotation driving means; a moving mechanism for moving the nozzle up and down; and a supply means for supplying high-pressure water to the nozzle. The mechanism is coaxially arranged in a nested structure, and a plurality of cylinders that can move relative to each other in the axial direction. The mechanism is disposed axially between the plurality of cylinders, and the inner cylinder is rotated to rotate the outer cylinder. A plurality of feed screw mechanisms for relative movement in the axial direction with respect to, and a rotation transmission mechanism for transmitting rotation by a rotation drive unit to each of the plurality of feed screw mechanisms, wherein the nozzle is an innermost cylindrical body. A can body cleaning device, which is attached to a tip of a can. 2. The plurality of feed screw mechanisms each include a plurality of screw portions arranged at positions symmetrical with respect to an axis of the cylindrical body and a nut screwed to each screw portion. Are not movable relative to the outer cylinder in the axial direction, and each of the nuts is engaged with the inner cylinder. The can body cleaning device according to claim 1, wherein the rotation is transmitted so as to rotate the can body. 3. A supply hose that connects the supply means to the innermost cylinder and guides high-pressure water to a nozzle, and a guide means that returns the supply hose from the supply means and guides the supply hose to the nozzle. Wherein the guide means is fixed to an outermost cylinder that is axially movable with respect to the apparatus structure, and the rotation transmission mechanism and the plurality of feed screw mechanisms respectively include the plurality of cylinders. 3. The can body cleaning apparatus according to claim 1, wherein the can body cleaning apparatus rotates so that an axial relative movement speed with respect to an adjacent cylinder is substantially equal.