JP2529802B2 - Cleaning equipment - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a cleaning device for cleaning the inside of a tank such as a reaction tank.

[0002]

2. Description of the Related Art As a cleaning device inside a tank, there is known a cleaning device in which a cleaning nozzle for injecting a pressurized cleaning liquid is attached to the tip of a flexible tube which penetrates the upper part of the tank and enters the inside of the tank. 63-287585).

The flexible tube is wound around a reel outside the tank, and the end of the flexible tube opposite to the nozzle is connected to the shaft hole of the reel rotation shaft. At the time of cleaning, the pressurized cleaning liquid is supplied to the flexible tube through the shaft hole, and the pressurized cleaning liquid is sprayed into the tank while the cleaning nozzle at the end of the flexible tube is moved up and down by driving the reel.

[0004]

However, in the case of this cleaning device, since the flexible tube moves in and out of the tank with cleaning, cleaning of the tank, for example, when flammable gas or toxic gas remains in the tank When you do
Residual gas leaks out through the inlet / outlet of the flexible tube, which is dangerous. Therefore, in such a case, the inside of the tank cannot be washed unless the residual gas is removed first.

To solve this problem, Japanese Patent Application No. 3-17
As proposed in No. 6978, there is one that pumps the seal fluid into the gap between the seal case and the flexible tube, but if a liquid is used as this seal fluid, the seal fluid collects at the bottom of the tank in addition to the washing liquid, There is a problem that it takes time to discharge these liquids.

Therefore, the present invention has been made to solve the above problems, and an object of the present invention is to provide a cleaning device capable of cleaning the inside of a tank without leaking residual gas.

[0007]

DISCLOSURE OF THE INVENTION The present invention provides a cleaning device provided with a cleaning nozzle for injecting a cleaning solution under pressure at the tip of a conduit penetrating the upper part of a tank and inserted into the inside of the tank. A seal case is provided in which a conduit is slidably penetrated through a through hole, a piston that is slidable in the axial direction of the conduit is housed inside the seal case, and the piston is inserted through the conduit. While the actuator is provided, an actuator that drives a piston in the axial direction of the conduit is attached to a seal case, and is provided in a through hole of the seal case and selectively comes in contact with and separates from an outer circumference of the conduit to seal a sliding gap. The sealing pinching means, the second sealing pinching means, which is also provided in the through hole of the piston and selectively contacts and separates from the outer periphery of the conduit to seal the sliding gap, and the through hole is opened.
Cover the seal case and slide the conduit freely in and out.
And a seal case cover having a seal member in contact therewith.

[0008]

Therefore, the conduit is sandwiched by the first sealing and sandwiching means provided on the seal case, the conduit is supported by the seal case and the seal case is sealed, and the second sealing and sandwiching means provided on the piston is released during this period. Then, after moving the piston to the top dead center or the bottom dead center, the second sealing and clamping means clamps the conduit and seals the seal case, and the first sealing and clamping means is released to move the piston. by moving the conduit, Ri Do can send back or a conduit to a tank without leakage of gas in the tank, the tank conduit
When returning from the
In order to move the ton toward top dead center,
Gas in the tank leaks from the through hole, but the through hole opens.
The seal case is a seal that freely slides in and out of the conduit.
Airtightness is maintained by a seal case cover equipped with members.
Gas leaks from the seal case cover to the outside.
Can be prevented.

[0009]

1 to 3 show an embodiment of the present invention.

1 to 3, 1 is a cleaning nozzle attached to the tip of a flexible tube 2 as a conduit, and 30 is a nozzle case for housing the cleaning nozzle 1. The nozzle case 30 is a bottomed cylindrical member having one end opened, and the flexible tube 2 penetrates the bottom surface of the nozzle case 30 and is taken out to the outside of the nozzle case 30.

Nozzle case 30 is shown in FIG.
As shown in FIG. 5, the knife gate valve 4 is attached to the upper part of the tank 40 to be cleaned through the knife gate valve 41.
Opening 1 opens communication with the inside of the tank 40.

The flexible tube 2 is a nozzle case 3
0 is wound around the hose reel 20 and the end opposite to the cleaning nozzle 1 is the rotary shaft 2 of the hose reel 20.
1 is connected to a shaft hole (not shown). The cleaning liquid is supplied to the flexible tube 2 through this shaft hole.

A seal case 3 having a flexible tube 2 penetrating therethrough is attached to the upper end of the nozzle case 30. The seal case 3 is formed of a tubular member with the bottom face up, the flexible tube 2 is inserted through a through hole 31 provided in the center of the bottom face, and the piston 7 can freely slide inside the seal case 3 in the vertical direction. Put in.

The upper part of the seal case 3 is covered with a seal case cover 4, and the seal case cover 4 is formed of a cylindrical member having a bottom face upward, like the seal case 3, and has a through hole provided at the center of the bottom face. Flexible tube 2 in 11
The seal member 12 that is in sliding contact with the flexible tube 2 is fixed to the through hole 11.
Further, the socket 13 provided on the seal case cover 4 is connected to a vacuum device (not shown) outside the cleaning device, and sucks the gas remaining inside the seal case cover 4.

Two air cylinders 5 for driving pistons 7 are erected on the upper surface of the seal case 3, and a rod 6 of the air cylinder 5 slidably penetrates the upper surface of the seal case 3 and is Proximity switches 10 for detecting the stroke position are provided on the cylinder 5 at the upper and lower ends of the stroke and are connected to a control device (not shown).

The piston 7 is a disk-shaped member which penetrates the flexible tube 2 in the vertical direction through a through hole 71 provided in the central portion, and the seal case 3 is formed on the upper surface of the piston 7.
One ends of the rods 6 of the air cylinders 5 projecting inside are fixed, and the pistons 7 are driven by the air cylinders 5 to slide in the seal case 3 in the vertical direction. The air cylinder 5 is connected to the pressurized air passage 18, is driven by a pump 83 and an accumulator 82 outside the cleaning device, and its operation is controlled by a valve 81.

Through hole 3 provided in the upper end surface of the seal case 3
An air gripper 9 formed of an expandable and contractible annular hollow member as a first hermetically-sealing means is attached to the inner circumference of the first gripper 1. Similarly, a second hole is formed on the inner circumference of the through hole 71 of the piston 7.
An air gripper 8 is attached as a hermetically sandwiching means.

The air grippers 8 and 9 expand due to the supply of pressurized air, and the inner circumference is brought into close contact with the flexible tube 2 to sandwich the flexible tube 2 and hold the seal case 3 in a sealed state. When pressurized air is removed from the air grippers 8 and 9, the compressed air contracts to release the flexible tube 2 and release the sealing of the seal case 3.

The pressurized air is supplied to the air gripper 8 via a rod 16 having one end fixed to the upper surface of the piston 7 and having an air passage 17 inside. Rod 16
Is a flexible tube 15 which penetrates the seal case 3 in a slidable manner and has an upper end protruding into the seal case cover 4 and an upper end of the rod 16 communicating with the pressurized air passage 19.
The piston 7 to which the lower end of the rod 16 is fitted is provided with the air passage 14 which communicates with the air gripper 8. Therefore, the flexible tube 15 and the air passage 14 communicate with each other through the air passage 17, and the piston 7 moves. Above all, pressurized air can be supplied to or discharged from the air gripper 8 via the air passage 17 of the rod 16. The air gripper 9 connects the air passage arranged in the seal case 3 (not shown) to the pressurized air passage 19 and receives the supply of pressurized air. The air grippers 8 and 9 are similar to the air cylinder 5 in that the pump 83 and the accumulator 82. Driven by the valve 91 and its operation is controlled by the valve 91.

With the above construction, the operation will be described below.

The cleaning nozzle 1 is stored in the nozzle case 30 when it is not in operation, and the nozzle case 30 is provided with the knife gate valve 4.
It is shut off from the tank 40 by 1.

When the tank 40 is washed, the pump 8
3 is started, pressurized air is supplied to the air grippers 8 and 9 and the air cylinder 5, and the air grippers 8 and 9 are supplied.
Is operated in synchronization with the air cylinder 5, and the flexible tube 2 is sent into the tank 40 in a stroke unit of the air cylinder 5 while hermetically sealing the gas in the tank 40. 4 to 7 are schematic views of the air grippers 8 and 9 and the piston 7 showing the feeding state of the flexible tube 2, which will be described below with reference to this.

The start of feeding the flexible tube 2 is shown in FIG.
As shown in FIG. 5, after moving the piston 7 to the top dead center, the air gripper 8 is operated to hold the flexible tube 2 and hold the seal case 3 closed. In this state, the knife gate valve 41 is opened, and as shown in FIG. 5, the air cylinder 5 is extended to lower the piston 7 holding the flexible tube 2 while lowering the flexible tube 2 from the hose reel 20 to move the cleaning nozzle 1 to the tank 40.
Hang on.

When the piston 7 moves to the bottom dead center, as shown in FIG.
As shown in FIG. 7, the air gripper 9 is operated to clamp the flexible tube 2, while pressurized air is discharged from the air gripper 8 to return only the piston 7 to the top dead center.
At this time, the air sucked into the upper portion of the piston 7 is sent out to the tank 40 from between the air grippers 8, but the airtightness of the tank 40 is maintained.

By repeating the operations of FIGS. 4 to 7, the flexible tube 2 can be fed in stroke units of the air cylinder 5 while maintaining the airtightness of the tank 40, and the cleaning liquid is jetted from the cleaning nozzle 1 during this time. The tank 40 is washed.

On the other hand, to rewind the flexible tube 2, as shown in FIGS. 8 to 11, first, the piston 7 is moved to the bottom dead center as shown in FIG. Then, the compressed air from the air gripper 9 is released, the air cylinder 5 is contracted as shown in FIG. 9, and the piston 7 is pulled up, and the flexible tube 2 is also pulled up, and the hose reel 20 winds the flexible tube 2 accordingly. return.

When the piston 7 reaches the top dead center, the air gripper 9 is operated to operate the seal case 3 as shown in FIG.
After supporting the flexible tube 2 with, the compressed air is removed from the air gripper 8 and the air cylinder 5 is extended to move only the piston 7 to the bottom dead center as shown in FIG.

When the piston 7 moves to the bottom dead center shown in FIG. 11, the gas in the tank 40 is sucked into the upper part of the piston 7, and the sucked gas passes through the air gripper 9 when the flexible tube 2 shown in FIG. 9 is pulled up. Then, the gas in the tank 40 leaks from the seal case cover 4 to the atmosphere because the vacuum device connected to the socket 13 is kept operating in this rewinding process. There is no.

In this way, the flexible tube 2 is clamped by the air gripper 9, the flexible tube 2 is supported by the seal case 3, and the air gripper 8 is released while the seal case 3 is being sealed and the piston 7 is top dead. To the bottom point or the bottom dead center, and then, while sandwiching the flexible tube 2 with the air gripper 8 and sealing the seal case 3, the gas in the tank 40 is leaked by releasing the air gripper 9 and moving the piston 7. The flexible tube 2 can be sent to or returned from the tank 40 without doing so.

Further, since the proximity switches 10 are provided at the upper end and the lower end of the stroke of the air cylinder 5, the feed amount or rewind amount of the flexible tube 2 is set with the stroke of the air cylinder 5 as the minimum unit in the controller (not shown). It becomes possible to measure, and it is possible to maintain an accurate feed amount or rewind amount even if the flexible tube 2 extends due to aging or the like.

In the above embodiment, the seal case cover 4
The gas remaining inside the chamber was sucked by the vacuum device connected to the socket 13, but instead of the vacuum device shown in FIG.
As shown in the schematic diagram of FIG.
In addition to supplying pressurized air higher than the internal pressure of P, the piston 7 is provided with a check valve 72 to allow the flow of pressurized air from the seal case cover 4 to the tank 40, and the gas in the tank 40 flows into the seal case cover 4. You may prevent it.

In the above embodiment, the air gripper 8
Although 9 and 9 are driven by pressurized air, they may be driven by liquid, and instead of the air gripper, a sealing and sandwiching means formed of shape memory alloy or the like may be used.

[0033]

As described above, according to the present invention, the first sealing and sandwiching means provided in the seal case supports the conduit and seals the seal case, and then the second seal provided in the piston.
Of the piston to move the piston to an arbitrary position, and then the second sealing and clamping means clamps the conduit and seals the seal case, while releasing the first sealing and clamping means to release the piston. To move the conduit, and
The conduit can freely move in and out of the seal case with a through hole
Cover with a seal case cover that has a seal member that slides on the
By cormorants, the gas tank from the seal case cover
It is possible to send or return the conduit to the tank without leaking to the outside, and because the liquid other than the cleaning liquid is not injected into the tank, the cleaning liquid discharge work can be shortened and the cleaning work can be performed efficiently. .

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

FIG. 2 is a sectional view of a rod of an air cylinder.

FIG. 3 is a side view showing a cleaning device and a tank.

FIG. 4 is a schematic view showing the start of feeding the flexible tube.

FIG. 5 is a schematic view showing a flexible tube being fed.

FIG. 6 is a schematic view showing the bottom dead center of the piston.

FIG. 7 is a schematic diagram showing the return of the piston to the top dead center.

FIG. 8 is a schematic view showing the start of rewinding of the flexible tube.

FIG. 9 is a schematic view showing the flexible tube being unwound.

FIG. 10 is a schematic view showing the top dead center of the piston.

FIG. 11 is a schematic diagram showing the return of the piston to the bottom dead center.

FIG. 12 is a schematic view showing another embodiment.

[Explanation of symbols]

 2 Flexible tube 3 Seal case 4 Seal case cover 5 Air cylinder 7 Piston 8 Air gripper 9 Air gripper 11 Through hole 16 Rod 18 Pressurized air passage 19 Pressurized air passage 31 Through hole 71 Through hole

Claims (1)

(57) [Claims] 1. In a cleaning device having a cleaning nozzle for injecting a pressurized cleaning liquid at the tip of a conduit penetrating the upper part of a tank and inserted into the inside of the tank, a conduit is slid through a through hole at a conduit inlet / outlet of the upper part of the tank. A seal case pierced through freely is provided, a piston that is slidable in the axial direction of the conduit is housed inside the seal case, and a through hole for inserting the conduit is provided in this pist, while the shaft of the conduit is provided. An actuator for driving the piston in a direction is attached to a seal case, and a first sealing and sandwiching means is provided in a through hole of the seal case to selectively come into contact with and separate from an outer circumference of the conduit to seal a sliding gap, and also to the piston. Second sealing and sandwiching means, which is provided in the through hole and selectively contacts and separates from the outer circumference of the conduit to seal the sliding gap, and covers the seal case in which the through hole is opened.
A sealing member that freely slides in and out of the conduit
A cleaning device comprising a seal case cover .