CN2139699Y

CN2139699Y - Water pressure testing device for gas steel cylinder

Info

Publication number: CN2139699Y
Application number: CN 92233390
Authority: CN
Inventors: 王会余
Original assignee: STATE-RUN NO 821 FACTORY
Current assignee: STATE-RUN NO 821 FACTORY
Priority date: 1992-09-19
Filing date: 1992-09-19
Publication date: 1993-08-04
Anticipated expiration: 2002-09-19

Abstract

The utility model provides a water pressure testing device for a gas steel cylinder. More than two independent water pressure testing loops for the gas steel cylinder are formed by two high pressure cylinders of an electric water pressure pump, two plungers of the electric water pressure pump, a capacity water pipe, a buffer tank, a pressure gauge, etc. A pressure control valve is added among the capacity water pipe, and the inlet pipe and the outlet pipe of a pump cylinder. A pressure reducing valve, the inlet pipe and the outlet pipe are connected in parallel between the capacity water pipe and the buffer tank to satisfy the requirements of slow inflation and slow shrinkage of the water pressure test of the gas steel cylinder. The utility model has the advantages of simple structure, easy operation, high efficiency, convenient operation, etc.

Description

Water pressure testing device for gas steel cylinder

The utility model belongs to pressure-vessel verifying attachment field, is specifically related to a kind of gas storage steel cylinder water test unit.

Along with developing by leaps and bounds of the development, particularly petroleum industry of producing, the bottled gas kind constantly increases, the use of gas storage steel cylinder more and more widely, oil liquefied gas body steel cylinder enters huge numbers of families.In view of the particular importance safe in utilization of pressure-vessel, it is checked by State Labour Bureau and bureaus of labour at different levels management through specialized department.State Labour Bureau and bureau of labour at different levels are strict especially to the examination requirements of pressure-vessel.One of the important procedure of its check and means are the hydraulic testings.Even steel cylinder stands the withstand voltage test of 1.5 times of working pressures, slowly expand, slowly shrink, check its residual deformation and other defect then.The steel cylinder Fang Zhun that is up to the standards uses.

The gas cylinder by hydrostatic pressure test device that " the gas cylinder test safety technology " that Nanjing bureau of labour publishes introduced, by the pressure testing water pump, volume weight tube, impact damper, tensimeter, valve and pipeline are formed.Generally use motor test pump SY-350 type in the practice examining.This pump has four setting-out cylinders and plunger.During test, four cylinders are worked simultaneously, and it is too fast to pressurize, and do not meet the requirement that the gas storage steel cylinder slowly expands, slowly shrinks.The manual single cylinder test pump of the employing that has, labour intensity is big, and inefficiency is not suitable for the requirement that the industrial scale gas cylinder is produced.

The purpose of this utility model provides a kind of simple in structure, easy to operate gas storage steel cylinder water test unit that meets national standard.

The technical solution of the utility model is to be joined by pressure control valve and motor test pump high pressure cylinder inlet by the capacity water pipe that a supply tank is connected with supply tank, the outlet of surge tank and high pressure cylinder is joined, a blowdown valve in parallel with the import and export pipe of motor test pump high pressure cylinder between capacity water pipe and surge tank, whole device is made up of aforesaid independently test loop more than two.

During check gas storage steel cylinder and surge tank to be tested are joined, be forced into 1.5 times of steel cylinder working pressures to steel cylinder water-filling turn on pump to be tested then, pressurize was reduced pressure after 5 minutes, satisfied the check of gas storage steel cylinder and slowly expanded, the residual deformation and the other defect of steel cylinder are checked in the slowly requirement of shrinking then.

The utility model has the advantages that simple in structure, safe and reliable, easy to operate (not needing frequent turn on pump, termination of pumping), raise the efficiency more than one times, meet the regulation of State Labour Bureau fully, satisfy the requirement that gas cylinder by hydrostatic pressure test slowly expands, slowly shrinks about the pressure-vessel hydraulic testing.

The utility model has following accompanying drawing:

Fig. 1 test unit structural representation.

Embodiment:

The structure of this device as shown in Figure 1.In the position that is higher than pressure-vessel 6 to be tested one supply tank 1 is installed, supply tank 1 is provided with water inlet pipe, rising pipe and run-down pipe, and supply tank 1 can be welded into book steel plate or aluminium sheet.By valve 7 and pipeline two capacity water pipes 2 and supply tank 1 are joined, capacity water pipe 2 usefulness transparent materials (glass or plastic cement) are made, and are carved with the scale of indicated water level above, as the usefulness of steel cylinder residual deformation measurement.The high pressure cylinder 3 of motor test pump and plunger 12 are known standard part of appliance SY-350 types, and this motor test pump has two high pressure cylinders and plunger, and its two high pressure cylinders and plunger are connected into two pressure testing loops after separately independently.Adorn a pressure control valve 9 and join with capacity water pipe 2 on the induction pipe of high pressure cylinder and plunger, its effect is not boost (pressurize) when closing, and boosts when opening, and only needs operated valve during test, does not need termination of pumping continually, turn on pump.Surge tank 4 is cylindrical pressure vessels, pressure-bearing can satisfy the safety requirements of the hydraulic testing, there is water inlet pipe to be connected with plunger 3 with high pressure cylinder, rising pipe and pressure-vessel to be tested 6 join, also be provided with two tensimeters 5, the pressure of monitoring device also is provided with safety valve 11 exactly, guarantees the safety of system.A blowdown valve 8 in parallel between capacity water pipe 2 and surge tank 4 with the import and export pipe of motor test pump high pressure cylinder.

Come the moisture two-way of self-supplying water tank 1, enter two high pressure cylinders of motor test pump through capacity water pipe 2 and pressure control valve 9, enter two steel cylinders 6 to be tested again, motor test pump work after being pressed into two surge tanks 4 by plunger, slowly pressurization, top pressure can reach 34.3MPa.On device, also be provided with vent valve 10, discharge intrasystem air during water-filling.

Claims

1, a kind of gas storage steel cylinder water test unit, the surge tank 4 that comprises the high pressure cylinder 3 of supply tank 1, the capacity water pipe 2 that is connected with supply tank 1, motor test pump and plunger 12, joins with the outlet of high pressure cylinder 3, it is characterized in that between capacity water pipe 2 and the motor test pump high pressure cylinder inlet tube pressure control valve 9 being housed, a blowdown valve 8 in parallel with the import and export pipe of motor test pump high pressure cylinder between capacity water pipe 2 and surge tank 4, whole device is made up of aforesaid independently test loop more than two.