JP4047221B2 - Auxiliary equipment for high pressure gas container pressure test - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
TECHNICAL FIELD The present invention relates to a pressure test apparatus for high pressure gas containers such as compressed gas and liquefied gas, and more specifically, a high pressure gas container capable of easily and efficiently performing each of a water injection process, a pressure test process and a drainage drying process of a pressure test. The present invention relates to a connection work auxiliary device for a pressure test.
[0002]
[Prior art]
A high-pressure gas container pressure test is known in which this type of high-pressure gas container pressure test is automated (see, for example, Patent Document 1).
[0003]
[Patent Document 1]
JP 2001-235411 A (page 3 to page 5, FIG. 1)
[0004]
[Problems to be solved by the invention]
In the conventional high pressure gas container pressure test apparatus, each connection fitting used in the water injection process, pressure test process and drainage drying process is attached to the base of the high pressure gas container through a screw joint or directly inserted. However, in order not to damage the female screw of the base, it is necessary to extremely slow the insertion speed of each connection fitting, and particularly when the high-pressure gas container is made of an aluminum alloy, the base is soft. As a result, there is a problem that the processing capacity is lowered.
[0005]
In recent years, the number of high pressure gas containers made of aluminum alloy and composite material high pressure gas containers in which glass fiber or carbon fiber is wrapped around an aluminum alloy liner has increased, and the working time and pressure of such high pressure gas containers have been shortened and automated. Is desired.
[0006]
Also, in the pressure test process, in a test where the high pressure gas container is put in a water tank and covered, and the amount of expansion of the pressurized container is measured, the pressure test fitting is put on a screw joint screwed into the base of the high pressure gas container. Since a pressure test is performed at a pressure of 50 MPa and a pressure test is performed at a high pressure of 50 MPa, a force of several tens of KN is applied to the lid, and there is a problem that the lid moves downward during the test and the measured value increases and the measurement accuracy decreases. Also, in the case of a test in which pressure is applied to a high-pressure gas container, if the pressure joint is put on the screw joint and pressurized, a force of several tens of kilometres is applied to the high-pressure gas container, and accurate pressure resistance measurement cannot be performed.
[0007]
The present invention has been made in view of the above-mentioned conventional problems, and each work process of the high-pressure gas container pressure test can be performed easily and efficiently without damaging the container base, and particularly high pressure with a soft base. An object of the present invention is to provide a high pressure gas container pressure test connection work auxiliary device capable of automating a pressure test of a high pressure gas container having a small diameter of a gas container or a base.
[0008]
Another object of the present invention is to provide a high pressure gas container pressure test connection assisting device that does not require a large force to move the pressure test fitting in the axial direction in the pressure test process and that provides high measurement accuracy. To do.
[0009]
[Means for Solving the Problems]
In order to achieve the above-mentioned object, the connection work auxiliary device of the present invention is individually disposed in a joint that is screwed into a base of a high-pressure gas container and installed in each work process of water injection, pressure test, and drainage drying. A water injection fitting that is detachably attached to the joint and is fitted in a watertight and airtight state, a pressure test fitting, and a drainage drying fitting, and the joint has a male screw portion that is screwed into the female screw of the base. An injection hole and a discharge hole extending in the axial direction are provided in the cylindrical body, and one opening of the injection hole and the discharge hole communicates with the high-pressure gas container through the base, and the other opening is outside the shaft-shaped main body. The water injection fitting has a water injection hole that communicates with the injection hole of the joint and an exhaust hole that communicates with the discharge hole. The joint The drainage metal fitting has a pressurizing hole that communicates with one of the inlet hole or the outlet hole and seals the other, and the drainage drying metal fitting is air or steam for drying that communicates with the injection hole of the joint It has an injection hole and drainage and exhaust holes communicating with the discharge hole.
[0010]
The one opening (lower end opening) communicating with the high pressure gas container of the joint injection hole preferably extends inward of the high pressure gas container from the one opening (lower end opening) of the discharge hole. . On the other hand, it is preferable that the other opening of the injection hole and the discharge hole provided on the side surface of the shaft-shaped main body communicate with an annular passage provided on the outer peripheral surface of the shaft-shaped main body.
[0011]
In addition, the injection hole and the discharge opening on the side surface of the shaft-shaped main body are provided by a seal ring interposed between the pressure-resistant test fitting fitted on the shaft-shaped main body of the joint and the outer peripheral surface of the shaft-shaped main body. When the hole is sealed from the atmosphere, and the cross-sectional area of the shaft-like main body portion with the seal ring interposed is substantially the same, the pressure-resistant test fitting is attached to the joint during a pressure test under high pressure. Since the force to move in the axial direction does not act, the measurement accuracy can be increased.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described with reference to the drawings.
[0013]
1 is a longitudinal front view showing a water supply process in a high pressure gas container pressure test using the apparatus of the present invention, FIG. 2 is a longitudinal front view showing the pressure test process, and FIG. 3 is a longitudinal front view showing the drainage drying process. is there.
[0014]
In the apparatus of the present invention, the joint 10 shared by the above-described three steps is used. As shown in FIG. 4, the joint 10 has a male screw portion 12 that is screwed into a female screw 3 provided on the base 2 of the high-pressure gas container 1 (see FIG. 5) at the lower end portion of the shaft-shaped main body 11. The flange portion 13 is continuously provided adjacent to the upper end of the male screw portion 12. An upper end portion of the shaft-shaped main body 11 is formed in a tapered portion 14 so that a connection fitting for each work process described later can be easily fitted. The shaft-like main body 11 is provided with an injection hole 15 and a discharge hole 16 extending in the axial direction. One opening (lower end opening) 15a and 16a of the injection hole 15 and the discharge hole 16 opens at the lower end surface of the shaft-shaped main body 11, and when the male screw portion 12 is screwed to the base 2 of the high-pressure gas container 1, the base 2 It communicates with the inside of the high-pressure gas container 1 through. In the illustrated embodiment, the nozzle 17 is connected to the lower end opening 15 a of the injection hole 15, and when the shaft body 11 is attached to the base 2, the opening end 15 a ′ of the container 1 is lower than the lower end opening 16 a of the discharge hole 16. It is comprised so that it may extend inward. This configuration is adopted so that air or water in the container 1 can be easily and completely discharged. The other openings (upper end openings) 15b and 16b of the injection hole 15 and the discharge hole 16 are opened on the upper outer surface of the shaft-shaped main body 11 while being shifted in the axial direction, and each of the openings 15b and 16b is opened. Ring grooves 18 and 19 are provided on the outer peripheral surface of the main body 11.
[0015]
In the joint 10 having the above-described configuration, the male screw portion 12 is screw-fitted to the female screw 3 of the base 2 and attached to the high-pressure gas container 1. It is connected to the base 2 in a watertight and airtight state. The pressure test of the high-pressure gas container 1 with the joint 10 attached to the base 2 in this way is performed in the order of steps shown in FIGS.
[0016]
First, the water supply process shown in FIG. 1 will be described. The water supply fitting 20 used in this step is configured as a cap-like body having a fitting hole 21 fitted in close contact with the shaft-like main body 11 of the joint 10, and includes a water supply hole 22 communicating with the injection hole 15, and a discharge hole An exhaust hole 23 communicating with 16 is provided penetrating in a lateral direction from the outer surface to the fitting hole 21. Further, on the inner wall surface of the fitting hole 21, three seal rings 24, 25 and 26 are fitted between the water supply hole 22 and the exhaust hole 23 and sealed from the atmosphere. When the fitting hole 21 is fitted to the shaft-shaped main body 11 and the water supply fitting 20 is fitted and attached to the joint 10, the water supply hole 22 communicates with the injection hole 15 through the annular groove passage 18 through the opening 15 b and the exhaust hole 23. Is communicated with the discharge hole 16 via the opening 16b through the annular groove passage 19, and the fitting hole 21 may be simply fitted to the shaft-shaped main body 11, and positioning work is not required. Therefore, the mounting work of the water supply fitting 20 to the joint 10 is very simple and can be easily performed manually by the operator. It is also easy to automate. A water supply pipe (not shown) is connected to the connection port 22 a of the water supply hole 22 of the water supply fitting 20, and an exhaust pipe (not shown) is connected to the connection port 23 a of the exhaust hole 23.
[0017]
When water supplied through the water supply hole 22 is injected into the container 1 through the injection hole 15 and the nozzle 17, the air in the container 1 is discharged from the discharge hole 16 through the exhaust hole 23. At this time, since the opening end 15 a ′ of the nozzle 17 connected to the lower end opening 15 a of the injection hole 15 extends downward in the container 1 from the lower end opening 16 a of the discharge hole 16, the air in the container 1 passes through the discharge hole 16. The container 1 can be completely discharged, and water is poured into the container 1 until it is full. When water is injected into the container 1, the water supply fitting 20 is removed from the joint 10, and the high-pressure gas container 1 with full water is transported to the pressure test process while the joint 10 is attached.
[0018]
Next, the pressure resistance test process shown in FIG. 2 will be described. The pressure-resistant test fitting 30 used in this step is configured as a cap-like body having a fitting hole 31 fitted in close contact with the shaft-like main body 11 of the joint 10 like the water supply fitting 20, and communicates with the injection hole 15. Although the pressurizing hole 32 is provided penetrating in the lateral direction from the outer surface to the fitting hole 31, the discharge hole 16 is sealed by the inner wall surface of the fitting hole 31. Further, two seal rings 33 and 34 for sealing the injection hole 15 and the discharge hole 16 from the atmosphere are fitted on the inner wall surface of the fitting hole 31. When the fitting hole 31 is fitted to the shaft-shaped main body 11 and the pressure-resistant test fitting 30 is fitted and attached to the joint 10, the pressure hole 32 communicates with the injection hole 15 via the annular groove passage 18 through the upper end opening 15b and discharged. The upper end opening 16 b of the hole 16 is sealed with the inner wall surface of the fitting hole 31. However, the lower end opening 16 a of the discharge hole 16 communicates with the injection hole 15 and the pressure hole 32 in the container 1. The pressurizing hole 32 may be communicated with the discharge hole 16 of the shaft-shaped main body 11, and the upper end opening 15 b of the injection hole 15 may be sealed with the inner wall surface of the fitting hole 31.
[0019]
In the case of the above-described pressure-resistant test fitting 30 as well as the water supply fitting 20, the fitting hole 31 need only be fitted to the shaft-shaped main body 11, and positioning work is not required. Therefore, the mounting work of the pressure-resistant test fitting 30 on the joint 10 is extremely simple and can be easily automated. A pressurized water supply pipe (not shown) is connected to the connection port 32 a of the pressure hole 32.
[0020]
With the pressure test fitting 30 fitted and attached to the joint 10 as described above, the pressure test of the container 1 is performed by applying or removing pressure through the pressure hole 32 with a pressure tester (not shown). At this time, pressure is applied not only to the injection hole 15 of the joint 10 but also to the discharge hole 16. However, since the cross-sectional area of the shaft-shaped main body 11 sealed by the seal rings 33 and 34 is the same, the pressure-resistant test fitting 30 Is not loaded in the axial direction of the joint 10. Therefore, accurate measurement data can be obtained.
[0021]
When the pressure test is completed, the pressure test fitting 30 is removed from the joint 10 and conveyed to the drainage drying process with the joint 10 attached.
[0022]
Next, the drainage drying process shown in FIG. 3 will be described. The drainage drying metal fitting 40 used in this step is configured as a cap-like body having a fitting hole 41 fitted in close contact with the shaft-like main body 11 of the joint 10 like the water supply metal fitting 20, and communicates with the injection hole 15. An injection hole 42 and a drainage and exhaust hole 43 communicating with the discharge hole 16 are provided penetrating laterally from the outer surface to the fitting hole 41. Further, on the inner wall surface of the fitting hole 41, three seal rings 44, 45 and 46 are fitted between the inlet hole 42 and the drainage / exhaust hole 43 and sealed from the atmosphere. When the fitting hole 41 is fitted to the shaft-shaped main body 11 and the drainage drying fitting 40 is fitted and attached to the joint 10, the injection hole 42 communicates with the injection hole 15 through the annular groove passage 18 through the opening 15 b and the drainage hole. 43 communicates with the discharge hole 16 via the opening 16b via the annular groove passage 19, and therefore, the fitting hole 41 may be simply fitted to the shaft-like main body 11 as in the case of the water supply fitting 20, and positioning work is not required. A pressure-feeding air / steam supply pipe (not shown) is connected to the connection port 42 a of the injection hole 42, and a drainage / exhaust pipe (not shown) is connected to the connection port 43 a of the drainage and exhaust hole 43.
[0023]
After fitting the drainage drying fitting 40 onto the joint 10 as described above, when the high pressure gas container 1 is inverted as shown in FIG. The water is discharged from the discharge hole 16 through the drain hole 43. Subsequently, steam is supplied through the injection hole 42 to dry the drained container 1. The steam used for drying is also discharged from the discharge hole 16 through the drain hole 43.
[0024]
With the above three steps, the pressure resistance test is completed.
[0025]
【The invention's effect】
As described above, according to the present invention, since one joint screw-fitted in advance to the base of a high pressure gas container to be pressure tested is shared in three steps of water injection, pressure test, and drainage drying, the container base is used. Each work process can be performed easily and efficiently without being damaged. In addition, the structure of the water injection fitting, pressure-resistant test fitting, and drainage drying fitting used in each process is simplified and the attachment / detachment work is easy, so that the pressure-resistant test can be easily automated. In particular, it is possible to automate the pressure test of a high-pressure gas container with a soft base and a high-pressure gas container with a small base diameter.
[0026]
According to the fourth aspect of the present invention, since a large force for moving the pressure-resistant test fitting in the axial direction is not applied in the pressure-resistant test step, it is possible to measure the pressure resistance with high accuracy.
[Brief description of the drawings]
FIG. 1 is a partially cut-away longitudinal front view showing a water injection process of a high-pressure gas container pressure test using a connection assisting device according to the present invention.
FIG. 2 is a partially cut-away front view showing the pressure resistance test process of the above.
FIG. 3 is a partially cutaway longitudinal front view showing the drainage drying process.
4A and 4B show joints constituting the main part of the connection work assisting device according to the present invention, wherein FIG. 4A is a front view, and FIG. 4B is a central longitudinal front view.
FIG. 5 is a longitudinal front view showing an example of a high-pressure gas container.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 High pressure gas container 2 Base 3 Female screw 10 Joint 11 Shaft-shaped main body 12 Male screw 14 Taper part 15 Injection hole 15a One opening (lower end opening) of injection hole 15
15b The other opening (upper end opening) of the injection hole 15
16 Discharge hole 16a One opening (lower end opening) of the discharge hole 16
16b The other opening (upper end opening) of the discharge hole 16
17 Nozzle 18, 19 Annular groove passage 20 Water filling fitting 21 Fitting hole 22 Water supply hole 23 Exhaust hole 24 to 26 Seal ring 30 Pressure-resistant test fitting 31 Fitting hole 32 Pressurizing hole 33, 34 Seal ring 40 Drainage drying fitting 41 Fitting Hole 42 Injection hole 43 Drainage and exhaust holes 44 to 46 Seal ring

Claims (4)

A joint that is screwed into the base of the high-pressure gas container and is installed separately for each of the water injection, pressure test, and drainage drying operations, and is detachable from the joint and fitted in a watertight and airtight state. Consists of a water injection fitting, a pressure test fitting and a drainage drying fitting,
The joint is provided with an axially extending injection hole and a discharge hole in a shaft-like main body having a male thread portion that is screwed into the female screw of the base, and one opening of the injection hole and the discharge hole is formed through the base into the high pressure Communicated with the gas container, and the other opening is provided on the outer surface of the shaft-shaped main body while being shifted in the axial direction;
The water injection fitting has a water injection hole communicating with the injection hole of the joint, and an exhaust hole communicating with the discharge hole,
The pressure-resistant test fitting has a pressure hole communicating with one of the injection hole or the discharge hole of the joint, and is configured to seal the other,
The drainage metal fitting has a drying air or steam injection hole communicating with the injection hole of the joint, and a drainage and exhaust hole communicating with the discharge hole. Connecting work auxiliary device. The said one opening which connects the said injection hole of the said injection hole with the said high pressure gas container is extended inward of the said high pressure gas container from the said one opening of the said discharge hole. Connecting work auxiliary device for high pressure gas container pressure test. The high-pressure gas container according to claim 1 or 2, wherein the other opening of the injection hole and the discharge hole provided on a side surface of the shaft-shaped main body communicates with an annular passage provided on an outer peripheral surface of the shaft-shaped main body. Connecting work auxiliary device for pressure test. The injection hole and the discharge hole opened on the side surface of the shaft-shaped main body are provided by a seal ring interposed between the pressure-resistant test fitting fitted on the shaft-shaped main body of the joint and the outer peripheral surface of the shaft-shaped main body. The auxiliary work for high-pressure gas container pressure test according to claim 1, 2 or 3, wherein the shaft-shaped main body portion sealed from the atmosphere and having the seal ring interposed therebetween has substantially the same cross-sectional area. apparatus.

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