Gas cylinder opening leak detection device

Abstract

The utility model belongs to a leak detection device, and particularly relates to a gas cylinder mouth leak detection device. The gas cylinder opening leak detection device comprises a transparent cover, the transparent cover is a cover body with a downward opening, a sealing device is arranged at the opening of the transparent cover, a water injection / drainage connector is arranged on the transparent cover, and the water injection / drainage connector is communicated with an external water source. The detection device has the remarkable effects that (1) the detection device is simple in structure, easy to manufacture and relatively low in manufacturing cost; (2) use and operation are light and convenient; (3) the steel cylinder does not need to be hoisted, so that production resources and energy can be saved; (4) the transparent cover with relatively small volume is used for containing detection water, and most of the detection water can be recycled, so that the water consumption is obviously reduced; the sealing condition can be observed through the transparent cover in a close range, and accurate observation is facilitated.

Description

Technical Field

[0001] The present novelty belongs to a leak detection device, and particularly relates to a leak detection device for the bottle mouth of a gas cylinder. Background Technique

[0002] A gas cylinder refers to a type of movable pressure vessel with a bottle-shaped main structure, generally filled with gases (which can be compressed gases, liquefied gases, dissolved adsorbed gases, etc.). A gas cylinder is a pressure-bearing device. Once a leakage occurs, it often causes adverse accidents. If the contained medium has properties such as flammability, explosiveness, toxicity, and strong corrosiveness, it may even cause catastrophic accidents. Therefore, to ensure the safe use of gas cylinders, strict airtightness inspections must be carried out before they are put into use.

[0003] According to the provisions of GB / T12317, there are two methods for airtightness detection of gas cylinders: the immersion method and the liquid coating method. Generally, the immersion method should be preferred for airtightness testing. When using the immersion method for airtightness testing, the immersion time of the tested gas cylinder should be no less than 1 min. After the tested gas cylinder is stable in the water tank, visually inspect each part. If no bubbles appear, it is qualified. The test water tank should meet the following requirements: a) The depth of the water tank should be such that the tested gas cylinder can be completely immersed in the water, and the highest point should be no less than 5 cm from the water surface; b) The inner wall of the water tank should be white, the water in the tank should be kept clean and transparent, and when the brightness in the tank is insufficient, lighting facilities should be provided at the bottom of the tank.

[0004] The immersion method has the following deficiencies in use: ① For gas cylinders with a larger volume, it means a larger water tank is required. Considering the lighting facilities, the water tank is not easy to manufacture and has a high cost; ② Hoisting operations need to be carried out on the gas cylinders, consuming a large amount of production resources and energy; ③ To ensure the accuracy of observation, the water quality requirement is high, and the test water needs to be frequently replaced during use, resulting in a large amount of water consumption and high use costs; ④ During the test, due to the buoyancy effect on the gas cylinders, it is difficult to ensure that some gas cylinders are completely immersed in the water, and fixtures need to be configured to complete the test, which will increase the test difficulty; ⑤ The observation distance during detection is far, which is not convenient for accurate observation.

[0005] Therefore, a leak detection device for the bottle mouth of a gas cylinder that can overcome the defects of the existing technology is needed. Content of the Utility Model

[0006] The present novelty aims at the defects of the existing technology and provides a leak detection device for the bottle mouth of a gas cylinder.

[0007] The present novelty is realized as follows: A leak detection device for the bottle mouth of a gas cylinder, which includes a transparent cover. The transparent cover is a cover body with an opening facing downwards. A sealing device is provided at the opening of the transparent cover, and a water injection / drainage joint is provided on the transparent cover. The water injection / drainage joint is communicated with an external water source.

[0008] As described above, a leak detection device for the bottle mouth of a gas cylinder, wherein the sealing device is a soft sealing ring.

[0009] In the gas cylinder mouth leak detection device as described above, the water filling / draining joint is connected to an external water source via a water filling / draining hose.

[0010] In the gas cylinder mouth leak detection device as described above, a fixing card is provided on the transparent cover for fixing the water injection / drainage hose.

[0011] In the gas cylinder mouth leak detection device as described above, the soft sealing ring is a circular ring-shaped part with an upward groove, the transparent cover is inserted downward into the groove of the soft sealing ring, and the transparent cover and the soft sealing ring are bonded together by strong glue.

[0012] In the gas cylinder mouth leak detection device as described above, the soft sealing ring is made of a rubber-plastic insulation pipe.

[0013] In the gas cylinder mouth leak detection device as described above, the transparent cover is made of a high-transmittance acrylic tube.

[0014] The remarkable effects of the present invention are: ① the detection device has a simple structure, is easy to manufacture and has a relatively low cost; ② it is light and easy to use and operate; ③ there is no need to lift the cylinder, which can save production resources and energy; ④ a relatively small transparent cover is used to hold the detection water, and most of the detection water can be recycled, which significantly reduces the water consumption; ⑤ the sealing condition can be observed through the transparent cover at a close distance, which is convenient for accurate observation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is the structural diagram of this patent

[0016] Figure 2 This is the application diagram of this patent

[0017] In the figure: 1. Soft sealing ring; 2. Transparent cover; 3. Fixing card; 4. Water filling / draining hose; 5. Water filling / draining joint; 6. Gas cylinder; 7. Gas cylinder mouth leak detection device; 8. Water for detection; 9. Gas cylinder valve. DETAILED DESCRIPTION

[0018] A gas cylinder mouth leak detection device comprises a sealing ring 1, a transparent cover 2, a fixing card 3, a water injection / drainage hose 4, and a water injection / drainage joint 5.

[0019] Among them, the sealing ring 1 is made of rubber-plastic insulation pipe with a circular cross-section and an opening at its upper end. The transparent cover 2 is made of high-transmittance acrylic tube. Its length and diameter are selected according to the size of the gas cylinder and the starter bottle valve. There is a small hole on one side of its lower part. The injection / drainage joint 5 partially passes through the small hole and is connected to the transparent cover 2, and is bonded together with a strong sealant. The lower end of the transparent cover 2 is inserted into the opening at the upper end of the sealing ring 1, and is bonded together with a strong glue. The fixing card 3 is a cable tie with a buckle, which is fastened to the upper part of the transparent cover 2, and one end of the injection / drainage hose 4 is sleeved on the outer circular surface of the injection / drainage joint 5.

[0020] A soft sealing ring is glued to the bottom end surface of the transparent cover 2 to achieve sealing of the detection water in the transparent cover 2 and ensure the detection water level height.

[0021] A water filling / draining joint 5 is installed on one side of the lower part of the transparent cover 2, which is used for the water filling / draining port of the transparent cover.

[0022] A water injection / drainage hose 4 is installed on one side of the water injection / drainage joint 5, which is used for injecting water into the transparent cover and draining water.

[0023] A fixing card 3 is installed on the upper part of the transparent cover 2 for fixing the water injection / drainage hose 4.

[0024] The working process of a gas cylinder mouth leak detection device provided by this patent is as follows:

[0025] Step 1: When conducting an air tightness test on the mouth of a gas cylinder, put the gas cylinder mouth leak detection device 7 on the gas cylinder 6 that has been filled with the test gas, fix the water injection / drainage hose 4 on the fixing card 3, and connect it to the test water source, start injecting water until the liquid level reaches the test requirement, disconnect the water injection / drainage hose 4 from the test water source, stop injecting water, and the sealing ring 1 will produce elastic deformation due to the pressure of the transparent cover 2 and the test water in the transparent cover 2, so as to achieve a sealing effect at the contact part between the sealing ring 1 and the tested gas cylinder 6, ensuring that the liquid level of the test water 8 is maintained at the required height, and the test personnel conduct visual observation and inspection according to the test requirements.

[0026] Step 2: After the air tightness test of the gas cylinder mouth is completed, the filling / draining hose 4 is removed from the fixing card 3, and the test water 8 can be discharged into the water storage container by itself. The small amount of test water 8 remaining below the filling / draining joint 5 in the transparent cover 2 can be discharged by itself by slowly lifting the transparent cover 2 from the tested gas cylinder 6, and the whole test process is completed.

Claims

1. A leak detection device for the bottle mouth of a gas cylinder, characterized in that: The transparent cover (2) comprises a transparent cover (2), which is a cover body with an opening facing downwards, a sealing device is provided at the opening of the transparent cover (2), and a water injection / drainage joint (5) is provided on the transparent cover (2), and the water injection / drainage joint (5) is connected to an external water source.

2. The gas cylinder bottle mouth leak detection device according to claim 1, characterized in that: The sealing device is a soft sealing ring (1).

3. The leak detection device for the bottle mouth of a gas cylinder according to claim 2, characterized in that: The water injection / drainage joint (5) is connected to an external water source via a water injection / drainage hose (4).

4. The leak detection device for the cylinder mouth according to claim 3, characterized in that: A fixing card (3) is provided on the transparent cover (2) for fixing the water injection / drainage hose (4).

5. The leak detection device for the gas cylinder mouth according to claim 4, wherein: The soft sealing ring (1) is a circular ring-shaped part with an upward groove. The transparent cover (2) is inserted downward into the groove of the soft sealing ring (1), and the transparent cover (2) and the soft sealing ring (1) are bonded together by strong glue.

6. The leak detection device for the gas cylinder opening according to claim 5, characterized in that: The soft sealing ring (1) is made of rubber-plastic thermal insulation pipe.

7. The leak detection device for the bottle mouth of a gas cylinder according to claim 6, wherein: The transparent cover (2) is made of a high light-transmitting acrylic tube.

8. The leak detection device for the gas cylinder mouth according to claim 7, characterized in that: The water injection / drainage joint (5) penetrates the transparent cover (2), and the contact portion between the water injection / drainage joint (5) and the transparent cover (2) is bonded together by a strong sealant.

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