Testing device for detecting leakage of threaded connection between cylinder valve and cylinder body of gas cylinder

Abstract

The utility model belongs to the technical field of valve detection, and particularly relates to a test device for detecting leakage of threaded connection between a cylinder valve and a cylinder body of a gas cylinder, which is characterized by comprising a gas storage cylinder group I, a gas storage cylinder group II, a booster pump, a gas extraction branch, a pressurization branch, an explosion-proof device and a water tank, and a gas inlet pipeline of the booster pump is communicated with the gas storage cylinder group I through a switching valve I; a gas outlet pipeline of the booster pump is respectively connected with a gas storage bottle group II and a switching valve II; a switching valve III is arranged on a gas inlet pipeline of the gas storage bottle group II; one end of the pressurizing branch is connected to a tee joint of a gas outlet of the booster pump, and the other end of the pressurizing branch is connected with one or more gas cylinders to be tested. The beneficial effects of the utility model are that: 1) the nitrogen in the booster pump and the bottle group is directly utilized to carry out a leakage test, and then the booster pump is utilized to recycle the nitrogen, and the nitrogen is stored in the standby bottle group, so that the resource waste is reduced to the greatest extent; 2) the operation is remotely monitored, and the operation safety is improved; and 3) the nitrogen replacement cost is saved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to valve detection technical field, especially relate to a kind of inspection gas cylinder valve and bottle body thread connection leakage test device. BACKGROUND

[0002] Whether the connection test of bottle valve and bottle body thread of gas cylinder inspection organization leaks is indispensable to inspection procedure, mainly test bottle valve and bottle body thread connection gas leakage situation, guarantee safety, reliability in future filling use process of gas cylinder, whether gas cylinder can meet the condition of recycling and reusing can be judged. Test gas source of general inspection organization uses air compressor more, there is also liquid nitrogen storage tank, vaporizer, liquid nitrogen filling pump liquid conversion gas use.

[0003] The utility model discloses a kind of detection bottle body valve leakage devices, including main pipe, bottle to be measured, test gas source bottle, vacuum pump, precision high pressure gauge, precision negative pressure gauge, first valve, second valve, third valve, fourth valve, valve to be measured, sixth valve, first branch pipe, second branch pipe, third branch pipe and fourth branch pipe;Sixth valve is set to one end of main pipe, vacuum pump is communicated to the other end of main pipe;First valve is set to main pipe, and first valve is located at the input end of vacuum pump;One end of first branch pipe is communicated to main pipe, and the other end of first branch pipe is communicated to bottle to be measured, and valve to be measured is the valve on bottle to be measured;One end of second branch pipe is communicated to main pipe, and the other end of second branch pipe is communicated to test gas source bottle, and the valve of bottle body can be carried out positive pressure and negative pressure leak detection experiment.

[0004] Nitrogen replacement is more cumbersome after air emptying in prior art, and conventional liquid nitrogen filling pump liquid conversion gas use has greater liquid waste, and liquid nitrogen cannot be completely recycled. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a kind of inspection gas cylinder valve and bottle body thread connection leakage test device, overcome the deficiency of prior art, directly utilize booster pump and bottle group nitrogen to carry out leakage test, then utilize booster pump to carry out nitrogen recycling again, and store in spare bottle group, maximum degree reduces resource waste.

[0006] To achieve the above object, the utility model realizes by following technical scheme:

[0007] The utility model provides a kind of test gas cylinder valve and bottle body thread connection leakage test device, including gas cylinder group one, gas cylinder group two, booster pump, gas extraction branch, pressurization branch, explosion-proof device and water tank, the gas inlet pipeline of booster pump is connected with gas inlet tee joint, and gas inlet tee joint is communicated with gas cylinder group one by switching valve one;The gas outlet pipeline of booster pump is equipped with gas outlet tee joint, and the gas outlet of booster pump is connected gas cylinder group two and switching valve two one end respectively, and the other end of switching valve two is connected gas outlet tee joint;Gas cylinder group two is equipped with switching valve three on gas inlet pipeline;The both ends of gas extraction branch are connected in the gas inlet tee joint and gas outlet tee joint of booster pump, and switching valve four is equipped on gas extraction branch, and pressurization branch one end is connected the tee joint of booster pump gas outlet, and the other end is connected one or more test gas cylinder;The water level in the water tank is higher than the minimum 50mm of test gas cylinder thread connection place;The explosion-proof device is arranged between booster pump and water tank;Vent valve is equipped on pressurization branch.

[0008] Further, the water tank is equipped with monitoring camera above, and monitoring camera is communicated with remote monitoring system, and the remote monitoring system is PLC control system with camera picture display.

[0009] Further, the model of booster pump is HEGBS-D400L-A.

[0010] Further, the explosion-proof device is 10mm thick, and the length and width of steel plate are 2000mm*1500mm.

[0011] Further, the gas inlet pipeline of gas cylinder group one and / or gas cylinder group two and pressurization branch are equipped with pressure gauge respectively, and the pressure gauge is remote pressure gauge, and it is communicated with remote monitoring system.

[0012] Further, the volume ratio of any one of gas cylinder group one and gas cylinder group two and the volume of test gas cylinder is 1.2-2:1.

[0013] Further, the specification of monitoring camera is LS-Z366FS.

[0014] Compared with prior art, the utility model has the beneficial effects that:

[0015] 1) by directly using booster pump and nitrogen in bottle group to carry out leakage test, then recycling nitrogen by booster pump again, and storing in standby bottle group, maximum degree of resource waste is reduced.

[0016] 2) remote monitoring operation, and test personnel can watch whether gas cylinder leaks gas through monitoring display, and personnel do not need to watch whether gas cylinder leaks gas on site, improve the safety of operation;

[0017] 3) saving the cost of nitrogen replacement, compared with the compressed air scheme, the power consumption of high-pressure air compressor is greatly reduced. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a structural schematic diagram of the embodiment of the utility model.

[0019] In the figure: 1-gas cylinder group one, 2-gas cylinder group two, 3-boost pump, 4-gas extraction branch, 5-pressurization branch, 6-explosion-proof device, 7-water tank, 8-gas inlet tee, 9-gas outlet tee, 10-switching valve one, 11-switching valve two, 12-switching valve three, 13-switching valve four, 14-gas cylinder to be tested, 15-monitoring camera, 16-remote monitoring system, 17-pressure gauge, 18-distribution valve one, 19-distribution valve two, 20-emptying valve. DETAILED DESCRIPTION

[0020] The technical solutions of the utility model will be described clearly and completely in combination with specific embodiments, obviously, the described embodiments are some of the embodiments of the utility model, rather than all the embodiments.

[0021] In order to more clearly illustrate the specific embodiments of the utility model or the technical solutions in the prior art, the specific embodiments needed in the specific embodiment or prior art description will be briefly introduced, obviously, the specific embodiments in the following description are some embodiments of the utility model, and for those skilled in the art, other specific embodiments can be obtained without creative labor.

[0022] The components of the embodiments of the utility model described and shown in the specific embodiments herein can be arranged and designed in countless different configurations. Therefore, the following detailed description of the embodiments of the utility model provided in the specific embodiments is not intended to limit the scope of the claimed utility model, but only represents selected embodiments of the utility model.

[0023] See Figure 1It is a kind of test gas cylinder bottle valve and bottle body thread connection leakage test device embodiment structure schematic drawing of the utility model, including gas storage bottle group one 1, gas storage bottle group two 2, booster pump 3, gas extraction branch 4, pressurization branch 5, explosion-proof device 6 and water tank 7, and the air inlet pipe of booster pump 3 is connected with air inlet tee joint 8, and air inlet tee joint 8 is connected with gas storage bottle group one 1 by switching valve one 10 and communicates;Gas outlet pipe of booster pump 3 is equipped with air outlet tee joint 9, and the gas outlet of booster pump 3 is connected with gas storage bottle group two 2 and one end of switching valve two 11 respectively, and the other end of switching valve two 11 is connected with air outlet tee joint 9;Gas inlet pipe of gas storage bottle group two 2 is equipped with switching valve three 12;Two ends of gas extraction branch 4 are connected on air inlet tee joint 8 and air outlet tee joint 9 of booster pump 3 respectively, and switching valve four 13 is equipped on gas extraction branch 4, one end of pressurization branch 5 is connected on air outlet tee joint 9 of booster pump 3, and the other end is connected with one or more test gas cylinders 14;The water level in water tank 7 is higher than the minimum 50mm of the thread connection of test gas cylinder 14;Explosion-proof device 6 is arranged between booster pump 3 and water tank 7;Vent valve 20 is arranged on pressurization branch 5.

[0024] Monitoring camera 15 is arranged above water tank 7, monitoring camera 15 communicates with remote monitoring system 16, and remote monitoring system 16 is PLC control system with camera picture display. The model of booster pump 3 is HEGBS-D400L-A. The thickness of explosion-proof device 6 is 10mm, and the length and width of steel plate are 2000mm and 1500mm.

[0025] Pressure gauges 17 are arranged on the air inlet pipe of gas storage bottle group one 1 and / or gas storage bottle group two 2 and pressurization branch 5 respectively, and the pressure gauges 17 are remote transmission pressure gauges, which communicate with remote monitoring system. The volume ratio of any one of gas storage bottle group one 1 and gas storage bottle group two 2 to the volume of the test gas cylinder is 1.2-2:1. The specification of monitoring camera 15 is LS-Z366FS.

[0026] In normal production, after gas cylinder inspection, gas needs to be filled to test whether the bottle valve and bottle body connection thread is leaked, the utility model embodiment uses gas storage bottle group one 1 (a group of 6 nitrogen gas cylinders) as gas source, fills nitrogen into the test gas cylinder 14 through pipeline and booster pump 3, then immerses the test gas cylinder 14 into water tank 7, observes whether bubbles are generated by using monitoring camera 15, and if no bubbles are generated, it is qualified, then the gas in the test gas cylinder 14 is recycled into gas storage bottle group two 2 (a group of 6 nitrogen gas cylinders) for reuse.

[0027] The operation steps of the utility model embodiment are as follows: 1) the gas cylinder in the gas cylinder group one 1 with pressure 15MPa is opened, nitrogen enters the pipeline through the switch valve one 10, and after the valve switch valve two 11, distribution valve one 18, distribution valve two 19, the gas flows into the gas cylinder 14 to be tested.2) when the gas pressure in the gas cylinder group one 1 and the pressure in the gas cylinder 14 to be tested are balanced, the pressure is stabilized for 2 minutes, the booster pump 3 is started, the gas in the gas cylinder group one 1 is drawn into the gas cylinder 14 to be tested, and the pressure is boosted to 15MPa, reaches the specified test pressure, the gas cylinder is soaked in the water tank 7, the immersion distance from the water surface is not less than 5cm, the monitoring camera 15 is used to observe the bottle valve and the bottle body connection thread, whether there is bubble generation, after 1 minute of static, no bubble generation, that is, qualified, completes the test.3) the switch valve one 10 and the switch valve two 11 are closed, the switch valve three 12 and the switch valve four 13 are opened, the gas in the gas cylinder 14 to be tested flows into the gas cylinder group two 2, when the pressure in the gas cylinder group two 2 and the pressure in the gas cylinder 14 to be tested are balanced, the pressure is stabilized for 2 minutes, the booster pump 3 is started, the gas in the cylinder group is drawn into the gas cylinder 14 to be tested, and the pressure is boosted to 15MPa, after the pressure in the gas cylinder 14 to be tested is drawn to 0.05MPa, the switch valve three 12 is closed, the vent valve 20 is opened, the pipeline pressure is exhausted, the gas cylinder 14 to be tested is unloaded, and then the leakage test of the next group of gas cylinder 14 to be tested is carried out.

[0028] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A device for testing the leakage of a threaded connection between a cylinder valve and a cylinder body, characterized in that it comprises: The device comprises a gas cylinder group one, a gas cylinder group two, a booster pump, an air extraction branch, a pressurization branch, an explosion-proof device and a water tank. The booster pump is connected with an air inlet three-way pipe, and the air inlet three-way pipe is communicated with the gas cylinder group one through a switching valve one. The booster pump is provided with an air outlet three-way pipe, and the air outlet of the booster pump is connected with the gas cylinder group two and one end of the switching valve two. The other end of the switching valve two is connected with the air outlet three-way pipe. The gas cylinder group two is provided with a switching valve three.

2. The device for testing the leakage of the threaded connection between the valve and the cylinder body of a gas cylinder according to claim 1, characterized in that, The air extraction branch is connected with the air inlet three-way pipe and the air outlet three-way pipe of the booster pump.

3. The device for testing the leakage of the threaded connection between the valve and the cylinder body of a gas cylinder according to claim 1, characterized in that, The air extraction branch is provided with a switching valve four.

4. The device for testing the leakage of the threaded connection between the valve and the cylinder body of a gas cylinder according to claim 1, characterized in that, One end of the pressurization branch is connected with the air outlet of the booster pump, and the other end is connected with one or more test gas cylinders.

5. The device for testing the leakage of the threaded connection between the valve and the cylinder body of a gas cylinder according to claim 1, characterized in that, The water level in the water tank is higher than the minimum 50mm of the thread connection of the test gas cylinder.

6. The device for testing the leakage of the threaded connection between the valve and the cylinder body of a gas cylinder according to claim 1, characterized in that, The explosion-proof device is arranged between the booster pump and the water tank.

7. The device for testing the leakage of the threaded connection between the valve and the body of a gas cylinder according to claim 2, characterized in that, The pressurization branch is provided with a vent valve. The water tank is provided with a monitoring camera, and the monitoring camera is communicated with a remote monitoring system. The remote monitoring system is a PLC control system with a camera picture display. The model of the booster pump is HEGBS-D400L-A. The explosion-proof device is a steel plate with a thickness of 10mm, a length of 2000mm and a width of 1500mm. The air inlet pipe of the gas cylinder group one and / or the gas cylinder group two and the pressurization branch are respectively provided with a pressure gauge. The pressure gauge is a remote pressure gauge, which is communicated with the remote monitoring system. The volume ratio of any one of the gas cylinder group one and the gas cylinder group two to the test gas cylinder is 1.2-2:

1. The specification of the monitoring camera is LS-Z366FS.

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