JPS6038188B2 - Can inner surface treatment equipment - Google Patents

Description

Detailed Description of the Invention "Industrial Application Field" The present invention is a method for applying a cleaning liquid or a flange-proofing liquid to the inside of a can such as a drum can, cleaning the inner surface of the can, and applying flange-proofing treatment to the inside of the can. This invention relates to a device for treating the inner surface of cans.

``Prior Art'' Conventionally, in order to clean the inner surface of a used drum when recycling it, the drum was immersed in a cleaning liquid in a cleaning liquid tank, and then turned upside down to drain the cleaning waste liquid.

"The problem that the invention attempts to solve" This caused the following problems.

■ The liquid content remaining in the drum gets mixed into the cleaning liquid in the cleaning liquid tank and adheres to the outside of the drum.
The cleaning solution had to be replaced frequently, and the amount used was large.

■ The entire device becomes large, and especially when it is incorporated into an existing drum shaping device as a pre-processing device, the drum shaping device must be modified accordingly and additional special auxiliary equipment must be prepared. , which required a great deal of expense.

The purpose of the present invention is to easily and efficiently clean the inner surface of the can while the can is upright, to perform anti-corrosion treatment, to treat the entire inner surface evenly, and to use processing liquid such as cleaning solution. It can be used efficiently and can be processed without contaminating the external surface of the can, and even when cleaning is performed as a pre-treatment device for an existing drum shaping device, etc., it is economical without any modification to the drum shaping device. An object of the present invention is to provide an apparatus for treating the inner surface of a can. "Means for Solving the Problem" The can internal surface treatment device of the present invention has a short cup-shaped nozzle with a bottom that can be inserted into and removed from the contents opening of the can. A much longer waste liquid suction pipe is installed vertically.

The peripheral wall of the nozzle and the suction bottom wall are radially bored with injection holes that are directed diagonally upward, approximately horizontally, and diagonally downward. A flange is provided on the upper part of the outer circumferential surface of the nozzle to engage with a lip protrusion of the contents inlet/outlet of the can. The length of the waste liquid suction pipe is such that when the waste liquid suction pipe is inserted into the can until the flange of the nozzle is engaged with the content inlet/outlet of the can, the lower end of the waste liquid suction pipe faces a position close to the bottom wall of the can. It's getting dark. The upper end of the retentate suction pipe passes through the bottom wall of the nozzle to form an annular space between it and the nozzle. This annular space is connected to a pressurized liquid feeding device, and the rising portion of the waste liquid suction pipe is connected to a waste liquid suction device. ``Operation'' Therefore, if the nozzle and the waste liquid suction pipe are simultaneously inserted into the can until the nozzle flange is engaged with the content inlet/outlet of the can, then the processing liquid is fed into the annular space from the pressurized liquid feeding device. The processing liquid is evenly introduced into the can in all directions through the injection holes of the nozzle, and at the same time, the processing waste liquid in the can is sucked into the waste liquid suction pipe from the bottom of the can and discharged to the outside.

"Example" An embodiment of the present invention will be described in detail below based on the drawings.

For example, this inner surface treatment device cleans a drum can 1 to be cleaned.
A short cup-shaped nozzle 4 with a bottomed outer diameter that can be freely inserted into and removed from the contents inlet/outlet 2 is fitted with a waste liquid suction pipe 5 which is smaller in size but much longer in length. It is set up.

This vertical installation is performed by installing the upper end 5a of the waste liquid suction pipe 5 in the center of the bottom wall 4b of the nozzle 4, and between the upper end 5a of the waste liquid suction pipe 5 and the nozzle 4, A space 8 is formed. The peripheral wall 4a and bottom wall 4b of the nozzle 4 include
A large number of injection holes 7 facing diagonally upward, almost horizontally, and diagonally downward.
are drilled radially.

In addition, the upper part of the outer peripheral surface of the nozzle 4 is attached to the green protrusion of the content inlet/outlet 2 of the drum 1 to prevent the nozzle 4 and the waste liquid suction pipe 5 from being inserted into the drum 1 for a predetermined amount or more. A regulating collar 6 is provided protrudingly. The length of the waste liquid suction pipe 5 is determined such that when the nozzle 4 is inserted into the drum 1 until the collar 6 engages with the green protrusion of the contents inlet/outlet 2, the lower end of the waste liquid suction pipe 5 reaches the bottom wall of the drum 1. The length is such that it can be seen at close range.

The annular space 8 is connected to a feeding pump which is a pressurized liquid feeding device via a liquid feeding pipe 9, and the upper end of the waste liquid suction pipe 5 is connected to a discharge pump which is a waste liquid suction device via a suction pipe 12. It is connected to the pump 13 for use.

The feed pump 10 sucks the cleaning liquid in the tank 11, and the discharge pump 13 returns the cleaning waste liquid to the tank 11.
is discharged to the outside without flowing back. The nozzle 4 having the waste liquid suction pipe 5 vertically disposed as described above is supported by a lifting device (not shown).

When the drum 1 is conveyed in an erect state by the conveyor 3 and the sensor detects that the contents inlet/outlet 2 is located directly below the waste liquid suction pipe 5, the conveyor 3 is stopped.

Thereafter, the nozzle 1 is automatically lowered by the lifting device until the nozzle 6 comes into contact with the lip protrusion of the content inlet/outlet 2 of the drum 1, and the waste liquid suction pipe 5 is drawn into the drum 1 from the content inlet/outlet 2. insert. When the feeding pump 10 is driven in this state, the cleaning liquid in the tank 11 is fed into the annular space 8 through the liquid feeding pipe 9, and the cleaning liquid flows radially and diagonally upward through the many injection holes 7, and almost Items are entered horizontally and diagonally downward. Therefore, drum can 1 is
The entire inner peripheral surface, inner bottom surface, and inner surface are evenly cleaned. Further, the cleaning waste liquid is immediately drawn into the waste liquid suction pipe 5 from the inner bottom of the drum can 1 by driving the discharge pump 13 at the same time as the feed pump 10, and is discharged through this. Since the lower end of this waste liquid suction pipe 5 is located close to the top of the bottom wall la of the drum can 1,
After the feeding of the cleaning liquid by the feeding pump 10 is completed, the cleaning waste liquid remaining in the drum can 1 is completely discharged. After cleaning is performed for a predetermined time in this manner, the nozzle 4 is raised and the waste liquid suction pipe 5 is extracted from the contents inlet/outlet 2, after which the conveyor 3 is driven again and the drum 1 is transported to another location.

"Effects of the Invention" As described above, the can inner surface treatment apparatus of the present invention has the following effects.

■ Insert the nozzle and waste liquid suction pipe at the same time until the nozzle flange engages the lip protrusion of the can's contents inlet/outlet, then
By feeding the processing liquid from the pressurized liquid feeding device into the annular space between these nozzles and the waste liquid suction pipe, the processing liquid can be introduced into the can from the injection hole of the nozzle, and this At the same time, the treated waste liquid inside the can can be suctioned and discharged through the waste liquid suction pipe, and this can be done while the can is in an upright position, making it easy and efficient to perform internal treatment such as cleaning the inside of the can. Moreover, it can be carried out efficiently without wasting processing liquid such as cleaning liquid, and without staining the outer surface of the can.

■ Processing liquid can be injected into the can while the can is in an upright position, and the processing waste liquid can be sucked out at the same time, making it possible to modify existing drum shaping equipment when cleaning, etc. is performed as pre-treatment for the existing drum shaping equipment. It can be implemented economically and efficiently without any special accessory equipment.

■ The nozzle is cup-shaped, and the peripheral and bottom walls are radially drilled with injection holes that point diagonally upward, almost horizontally, and diagonally downward, allowing the processing liquid to be injected in all directions inside the can, making it possible to hold the can upright. Even if it is processed in a state, the inner surface can be processed evenly.

■ Determine the length of the waste liquid suction pipe when the waste liquid suction pipe is inserted into the can until the nozzle collar engages with the content inlet/outlet of the can.
Since the lower end of the waste liquid suction pipe is made long enough to face the bottom wall of the can, the treated waste liquid can be completely discharged into the can.

BRIEF DESCRIPTION OF THE DRAWINGS The drawings are partially omitted sectional views showing one embodiment of the present invention.

Claims (1)

[Claims] 1 A short cup-shaped nozzle 4 with a bottom that can be inserted into and removed from the contents opening 2 of a can is fitted with a waste liquid suction pipe 5 which has a smaller diameter but is much longer than the nozzle 4, and its upper end 5a is connected to the nozzle 4. An annular space 8 is formed between the nozzle 4 and the nozzle 4 through the bottom wall 4b of the
In the peripheral wall 4a and bottom wall 4b of the nozzle 4, injection holes 7 are formed diagonally upward, almost horizontally and diagonally downward, and in the upper part of the outer peripheral surface of the peripheral wall 4a of the nozzle 4, A collar 6 attached to the lip protrusion of the contents entrance/exit 2
The length of the waste liquid suction pipe 5 is set such that when the waste liquid suction pipe 5 is inserted into the can until the collar 6 engages with the lip protrusion of the contents inlet/outlet 2, the length of the waste liquid suction pipe 5 is The length is such that the lower end faces close to the bottom wall of the can, and the annular space 8 is connected to a pressurized liquid feeding device 10, while the upper end of the waste liquid suction pipe 5 is connected to a waste liquid suction device 13. A device for treating the inner surface of cans.