JPH0828793A - Maintenance device of high pressure gas container - Google Patents

Abstract

PURPOSE:To reduction the labor and enhance the efficiency by continuously and automatically executing the shot blast working, process such as weighing, coating application, fitting, etc.,of gas containers such as LP gas containers, etc., during process to suspend and carry the gas containers by a conveyer. CONSTITUTION:Gas containers B recycled from users are suspended and carried by a carrier conveyer 13, and firstly cleaned during the carrier process by spraying a shot to the outer surfaces of the gas containers B by a shot blast device 16. Next, after the containers B are weighed by a weighing device 19, they are sent inside the booth 20a of a coating application 20 so as to be electrostatically coated. After the coating application, the gas containers B are put in a drier 21 so as to dry and seize coating under supply of hot air, then sent in the position of an automatic marking device 23 so as to mark necessary particulars such as the address, name and telephone number of a handling manufacturer, a filling period, etc., by accessing data initially registered, and after that, a valve is attached to each gas container B by an automatic valve attaching/detaching device 27.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a maintenance device for a high pressure gas container used in a reinspection process for LP gas containers and the like.

[0002]

2. Description of the Related Art By law, high-pressure gas containers such as LP gas containers are required to be re-inspected every predetermined period of use. This inspection is generally performed by the following procedure. That is, first, after recovering the gas remaining inside from the gas container to be inspected, a pressure resistance test is performed in accordance with the standards related to the container safety regulations. After the test, the container is drained and dried, rusted off by shot blasting, mass measurement,
It is sent for reuse after being subjected to necessary processing such as engraving, painting, baking and drying.

At the time of the above-mentioned re-inspection, the gas container, which is the object to be inspected, was manually carried to each work position to perform the work in order, but since the gas container is heavy and has a shape difficult to carry, It required a lot of labor and the work efficiency was poor. In order to solve this, it is also carried out by suspending the gas container on a hanger and carrying it by a chain conveyor, but there is no system for carrying out a series of work continuously while carrying it by the conveyor, and still It was inefficient. In particular, the shot blasting process is performed in a separately provided shot blasting chamber with the gas container lying down, so it takes labor and time to put in and take out the gas container.

[0004]

SUMMARY OF THE INVENTION Therefore, the present invention improves the above-mentioned conventional maintenance work method for a high-pressure gas container, and is capable of performing work efficiently without requiring a lot of manpower. The challenge is to provide.

[0005]

In order to solve the above problems, the present invention provides the following device. That is, the maintenance device for a high-pressure gas container according to the present invention is a conveyor for suspending and transporting the high-pressure gas container, and a cleaning process by spraying a shot on the outer surface of the high-pressure gas container that is provided in the transport path of the conveyor and transported. A shot blasting device, a weighing device for measuring the mass of the high pressure gas container after shot blasting, a coating device for coating the high pressure gas container conveyed by the conveyor, and a baking device for baking the paint after coating. Be prepared.

In addition to the above-mentioned devices, it is more efficient to provide a marking device for displaying predetermined display items on the gas container after painting.

[0007]

The high-pressure gas container that has undergone the pressure resistance inspection is successively hung from the hanger of the conveyor and conveyed in a predetermined direction, and the following operations are carried out in sequence by each device provided in the middle of the conveying process. First, a high-pressure gas container is carried into a shot blasting device, and shots are blown while the gas container is suspended to clean the outer surface. After the shot blast treatment, the gas container is weighed by a weighing device provided in the middle of the transportation process, and then the surface is coated,
Subsequently, the paint is baked and dried. The gas container after painting is removed from the hanger of the conveyor and delivered to the next step.

Before delivering the painted gas container,
It is more convenient to perform predetermined marking on the surface of the gas container with an automatic marking device.

[0009]

Embodiments of the present invention shown in the drawings will be described below. FIG. 1 shows an inspection facility for inspecting a container having an LP gas container of less than 130 〓. In FIG. Has been described.

In the gas container B collected from the user, first, each data of the individual container is input to the host computer 1 of the inspection system. Next, the residual gas recovery device 2 recovers the residual liquid and residual gas in the gas container. After the collection of the residual liquid and the residual gas is completed, the container valve is removed by the automatic valve removing machine 3.

The pressure container is subjected to a pressure resistance test by the pressure resistance tester 4 after the recovery of the residual liquid and the residual gas and the removal of the valve. This pressure test is carried out in accordance with the standards related to container safety rules, such as water injection into containers, pressure test, expansion measurement,
It is designed to automatically perform a series of drainage and internal drying operations. The expansion data measured here is displayed on the control panel 4a, and is also input and stored in the host computer 1 in association with each container. If the test result is unsuccessful, a warning is issued by the control panel and also input to the host computer, and the gas container concerned is excluded from the system. If the worker determines that it is necessary,
The re-inspection is performed by inputting the re-inspection command using the key on the control panel.

In the gas container that has undergone the pressure resistance test, a predetermined hook F is screwed onto the valve mounting portion of the head, and the gas container is sent to the position of the automatic marking machine 5 and the container is rotated to select the marking location. After that, a predetermined marking is made. This marking is made in association with the data recorded in the host computer 1.

The stamped gas container B is the device 10 of the present invention.
After being placed on the receiving conveyor 11 provided in the receiving section of the device and aligned by the aligning device 12 so that the hooks are oriented in a certain direction, the hooks are sequentially sent to the end part of the receiving conveyor and arranged thereabove. The chains are hung from the hangers 14 of the chain type conveyor 13 and conveyed sequentially. Reference numeral 15 in the drawing is a take-up device for applying tension to the chain of the conveyor.

The gas container suspended on the conveyer 13 is sent to the shot blasting device 16 to be shot blasted. The shot blasting treatment is a treatment of blowing a shot by centrifugal force to remove rust and old paint on the outer surface of the gas container. The posture is regulated by a regulation guide while the gas container is suspended on the hanger of the conveyor 13. Processing is performed with a gun (shot discharge nozzle) whose position is fixed while rotating the gas container around a vertical axis.
During this time, the movement of the conveyor is stopped. The processing time per container is usually 1 minute or less.

The gas container whose outer surface has been cleaned by the shot blasting process has a measuring device 1 installed in the middle of the carrying process.
At 9, mass measurements are taken. This measurement is performed by placing the gas container suspended on the conveyor 13 on the electronic platform scale. The measurement data is input to the host computer and the measurement result is judged. If the result of the measurement deviates from the specified mass, an alarm is issued and the defective product is rejected by the worker there. The determination of the measurement result may be performed directly by the worker.

The gas container whose mass has been measured is fed into the booth 20a of the coating apparatus 20 and electrostatically coated. This coating is carried out in two stages of undercoating (A) and topcoating (B). During painting, the suspended gas container is rotated around a vertical axis, and the paint spray nozzle slowly moves up and down to achieve uniform painting throughout the entire area.

The coated gas container is dried by the dryer 21. The drying device in the illustrated example is a hot air drying furnace,
The paint is dried and baked at about 130 to 150 ° C. while suspending and transporting the gas container.

After coating and drying, the gas container is automatically
It is carried to the position of the king machine 23, the data registered in the initial stage is called, and necessary information such as an address, a trader name, a telephone number, and a filling deadline is marked. In this case, since the gas container is suspended vertically, no special centering operation is required, and as a result of centering, it is possible to efficiently perform marking at a predetermined position. Note that this marking may be performed after the gross weight measurement described later, and further, the marking may be performed outside the line without the automatic marking machine 23 being placed in the line.

After the marking is completed, the gas container is delivered onto the free roller of the carry-out slat conveyor 25, the hook F is removed, and the valve is attached by the automatic valve attaching / detaching machine 27. In this case, free
Pre-screw a few threads on the roller, select the direction of the container and valve, and send them to the valve detaching machine. The valve detaching machine automatically tightens the valve by operating the push button.

The gas container equipped with the valve is evacuated by the evacuation device 29, and then the container number,
The container weight is keyed in on the control panel, and the total weight is measured by the total weight scale 30. This gross weight data is transmitted to and recorded in the host computer. Further, since the label printer 32 issues a label indicating the total weight, it is attached to a predetermined position of the gas container.

In the figure, 33 is a control board (interface board), 34 is a marking pump unit, and 35 is a gun controller for marking.

This high-pressure gas container maintenance device continuously carries out necessary processing such as shot blasting, weighing, painting, drying, valve mounting, marking, etc. while transporting the gas container which has undergone the pressure resistance inspection in a certain direction by a conveyor. Since it is done automatically, a series of maintenance work can be performed efficiently. In particular, in the present invention, since shot blasting, which conventionally requires a lot of labor, can be continuously performed in the transport line while the gas container is suspended from the conveyor, the labor required can be greatly reduced.

A gas container, which is a work container, or a hanger for suspending the container, is provided with a tag of, for example, a magnet type for indicating the container type, size, etc., and the tag is fed to the line. By installing a reader for reading in appropriate places in the line, for example, when processing a small gas container, the number of operating guns of the shot blasting device is reduced, and the vertical movement range of the coating nozzle is reduced. It is possible to save unnecessary materials and power.

[0024]

As is apparent from the above description, the maintenance device for a high-pressure gas container according to the present invention continuously performs shot blasting, metering, coating, drying, etc. of the gas container in a series of almost automatic operations. Since it can be performed automatically, it is possible to save a large amount of labor and to perform efficient processing.

[Brief description of drawings]

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

FIG. 2 is an explanatory view of a suspended state of a gas container.

[Explanation of symbols]

 3 Automatic valve removing machine 4 Pressure resistance test device 13 Conveyor conveyor 16 Shot blasting device 19 Measuring device 20 Coating device 21 Drying device 23 Automatic marking device B High-pressure gas container

Claims (2)

[Claims] 1. A conveyor for suspending and transporting a high-pressure gas container, a shot blasting device provided on the transporting path of the conveyor for spraying shots onto the outer surface of the high-pressure gas container to be cleaned, and a shot blasting machine after shot blasting. Maintenance device for a high-pressure gas container, including a weighing device for measuring the mass of the high-pressure gas container, a coating device for coating the high-pressure gas container conveyed by a conveyor, and a baking device for baking the paint after coating. . 2. A conveyor for suspending and transporting a high-pressure gas container, a shot blasting device provided in a transport path of the conveyor for spraying a shot onto the outer surface of the high-pressure gas container to be cleaned, and a shot blasting device after shot blasting. Measuring device for measuring the mass of the high-pressure gas container, a coating device for coating the high-pressure gas container conveyed by the conveyor, a baking device for baking the paint after painting, and a predetermined mask on the outer surface of the high-pressure gas container. A maintenance device for the high-pressure gas container, which comprises a marking device for performing the king.