JP2794392B2 - High pressure gas container maintenance equipment - Google Patents

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 re-inspection process for an LP gas container or the like.

[0002]

2. Description of the Related Art High-pressure gas containers such as LP gas containers are required by law to be re-inspected every predetermined use period. This inspection is generally performed in the following procedure. That is, first, the gas remaining inside the gas container to be inspected is recovered, and then a pressure resistance test is performed in accordance with the standards related to container security rules. After draining and drying the container after the test, rust it off with shot blast, measure the mass,
Necessary treatments such as stamping, painting, baking and drying are applied and reused.

At the time of the above re-examination, the gas container as the subject was manually carried to each work position to perform the work in sequence. However, the gas container is heavy and has a shape that is difficult to carry. It required a lot of labor and the work efficiency was poor. In order to solve this, a gas container is hung on a hanger and transported by a chain conveyor.However, there is no system in which a series of operations are continuously performed while being transported by a conveyor. It was inefficient. In particular, since the shot blasting process is performed while the gas container is laid down in a separately provided shot blasting room, the work of taking the gas container in and out takes time and effort.

[0004]

SUMMARY OF THE INVENTION Accordingly, the present invention is an improvement of the above-described conventional high-pressure gas container maintenance work method, and an apparatus and a system which can perform 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 apparatus. That is, the high-pressure gas container maintenance device according to the present invention cleans the conveyor by suspending and transporting the high-pressure gas container and spraying a shot on the outer surface of the high-pressure gas container provided in the transport path of the conveyor. A shot blasting device, a measuring device for measuring the mass of the high-pressure gas container after the shot blast, a coating device for coating the high-pressure gas container conveyed by the conveyor, and a baking device for baking the paint after the coating. Be prepared.

[0006] In addition to the above devices, it is more efficient to provide a marking device for displaying predetermined display items on the gas container after coating.

[0007]

The high-pressure gas containers having undergone the pressure resistance test are sequentially suspended on a hanger of a conveyor and transported in a predetermined direction, and the following operations are sequentially performed by each device provided in the middle of the transport process. First, a high-pressure gas container is carried into a shot blast device, and a shot is blown while the gas container is suspended to clean the outer surface. The gas container after the shot blasting process is weighed by a measuring device provided in the middle of the transfer process, and then the surface is coated,
Subsequently, the paint is baked and dried. The gas container after coating is removed from the hanger of the conveyor and delivered to the next process.

[0008] Before delivery of the gas container after painting,
It is more convenient to perform a predetermined marking on the surface of the gas container with an automatic marking device.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment 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 liters . In FIG. 1, an apparatus according to the present invention and an apparatus used in an earlier process are combined. Have been described.

[0010] 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 and residual gas in the gas container are recovered in the residual gas recovery device 2. The container valve of the gas container from which the residual liquid and the residual gas have been collected is removed by the automatic valve removing device 3.

The gas container from which the residual liquid and the residual gas have been collected and from which the valve has been removed is subjected to a pressure test by the pressure test apparatus 4. This pressure test is performed in accordance with the standards related to container security regulations. Water injection into the container, pressure test, expansion measurement,
A series of operations such as drainage and internal drying are automatically performed. The measured expansion data is displayed on the control panel 4a, and is input to the host computer 1 and stored in correspondence with each container. If the test result is unsuccessful, a warning is issued on the control panel and input to the host computer, and the gas container is excluded from the system. If the worker determines that it is necessary,
The re-inspection is performed by inputting a re-inspection command using the key on the control panel.

The gas container having been subjected to the pressure test is screwed into a valve mounting portion at the head thereof, and is sent to the position of the automatic stamping machine 5 where the container is rotated to select the position to be stamped. Thereafter, a predetermined marking is made. This marking is performed in association with data recorded in the host computer 1.

The stamped gas container B is used for the device 10 of the present invention.
Is placed on a receiving conveyor 11 provided in a receiving section of the receiving unit, and the hooks are aligned so that the hooks are directed in a predetermined direction by an orientation aligning device 12, and then sequentially sent to a terminal end of the receiving conveyor, where the hooks are arranged upward. And is sequentially conveyed by being hung on a hanger 14 of a chain-type conveyer 13. In the figure, reference numeral 15 denotes a take-up device for applying tension to the chain of the conveyor.

The gas container suspended on the conveyor 13 is sent to a shot blast device 16 where a shot blast process is performed. The shot blasting process is a process in which a shot is blown by centrifugal force to remove rust and old paint on the outer surface of the gas container. The processing is performed by a gun (shot discharge nozzle) whose position is fixed while rotating the gas container about a vertical axis.
During this time, the movement of the conveyor stops. 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 is visually inspected for corrosion at the bottom and the like, and the mass is measured by a weighing device 19 provided in the middle of the transporting process. This measurement is performed by placing the gas container suspended on the conveyor 13 on an electronic bench scale. The measurement data is input to the host computer, and the measurement result is determined. If the measurement results deviate from the specified mass,
An alarm is issued and the defective product is then eliminated by workers. The determination of the measurement result may be performed directly by the worker.

The gas container whose mass has been measured is sent into a bush 20a of the coating apparatus 20, where electrostatic coating is performed. This coating is performed in two stages: undercoating (A) and overcoating (B). During the coating, the suspended gas container is rotated about a vertical axis, and the spray nozzle of the paint moves slowly up and down, so that the entire coating is uniformly applied.

The coated gas container is dried by a drying device 21. The drying device in the illustrated example is a hot air drying oven,
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 marked.
The data is carried to the location of the king machine 23, and the initially registered data is called up, and the necessary information such as the address, the name of the handling company, the telephone number, the filling time limit and the like are marked. In this case, since the gas container is suspended vertically, no special centering operation is required, and centering is performed. As a result, marking can be efficiently performed at a predetermined position. The marking may be performed after the total weight measurement described later, or the marking may be separately performed outside the line without inserting the automatic marking machine 23 into the line.

The gas container having completed the marking is delivered to a free roller of the unloading slat conveyor 25, where the hook F is removed, and the valve is attached by the automatic valve detacher 27. In this case,
The valve is screwed in advance several times on the roller, and the direction of the container and the valve is selected and sent to the valve detacher. The valve detacher automatically tightens the valve by operating a push button.

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

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

This high-pressure gas container maintenance device continuously performs necessary processes such as shot blasting, weighing, coating, drying, valve installation, and marking while transporting the gas container having undergone the pressure resistance test in a certain direction by a conveyor. This makes it possible to perform a series of maintenance work efficiently. In particular, in the present invention, shot blasting, which conventionally required a great deal of labor, can be performed continuously in a transport line while the gas container is suspended on a conveyor, so that the required labor can be greatly reduced.

A gas container as a work or a hanger for suspending the gas container is provided with, for example, a magnet-type tag for indicating the type and size of the container, and the tag is passed through a line. For example, when a small gas container is processed, the number of operation guns of the shot blasting device can be reduced, and the vertical movement range of the coating nozzle can be reduced by providing a reader for reading in a proper position on the line. It is possible to save unnecessary materials and power.

[0024]

As is apparent from the above description, the maintenance apparatus for a high-pressure gas container according to the present invention performs shot blasting, weighing, painting, drying, etc. of the gas container continuously and almost automatically in a series of lines. In this way, a large amount of labor can be saved, and efficient processing can be performed.

[Brief description of the drawings]

FIG. 1 is a layout diagram illustrating an embodiment of the present invention.

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

[Explanation of symbols]

 Reference Signs List 3 automatic valve remover 4 pressure-resistant test device 13 transport conveyor 16 shot blast device 19 measuring device 20 coating device 21 drying device 23 automatic marking device B high-pressure gas container

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-5-26397 (JP, A) JP-A-2-243942 (JP, A) JP-B-62-23197 (JP, B2) (58) Field (Int.Cl. ⁶ , DB name) F17C 5/02 B65G 9/00 F17C 13/02 301

Claims (2)

(57) [Claims] 1. A conveyor for suspending and transporting a high-pressure gas container, a shot blast device provided in a transport path of the conveyor for blowing a shot onto an outer surface of the transported high-pressure gas container for cleaning, and after the shot blasting. A high-pressure gas container maintenance device comprising a measuring device for measuring the mass of a 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 on a transport path of the conveyor for blowing a shot onto an outer surface of the transported high-pressure gas container for cleaning, and after the shot blasting. A 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 coating, and a predetermined device on the outer surface of the high-pressure gas container. A high-pressure gas container maintenance device including a marking device for performing a king;