A steel bottle sealing detection device

Abstract

The utility model discloses a kind of steel bottle sealing property detection devices, including processing table, gas conveying component, the processing table upper portion is provided with lifting assembly, and lifting assembly can drive sealing head to move, the sealing head is used to seal the open end of steel bottle, and sealing head inside is provided with connecting pipe, the gas conveying component is sent gas to steel bottle interior by connecting pipe, and gas conveying component is connected with gas tank gas outlet, the gas tank both sides are provided with first air inlet and second air inlet, and first air inlet is connected with gas storage tank by communicating pipe component, the utility model is switched by the sealing plate in the gas tank inside and drive motor cooperation, the communication state of first air inlet and second air inlet can be switched by driving sealing plate rotation, to further make device can be detected by the inert gas or external gas of gas storage tank to steel bottle, to meet the detection needs of different types special gas steel bottle.

Description

Technical Field

[0001] This utility model mainly relates to the field of gas cylinder testing technology, specifically a gas cylinder sealing testing device. Background Technology

[0002] Specialty gas cylinders are widely used in precision fields such as semiconductor manufacturing, biomedicine, aerospace, and high-end chemicals. The gases they contain often have special properties, including corrosiveness (such as hydrogen fluoride and chlorine), toxicity (such as arsine and phosphine), flammability and explosiveness (such as hydrogen and acetylene), or high purity requirements (such as ultra-high purity nitrogen and helium). The sealing performance of these cylinders directly affects the safety of gas storage and transportation, the stability of gas purity, and the safety of the surrounding environment and personnel. Therefore, after regular inspections and maintenance, rigorous sealing tests must be performed.

[0003] However, traditional single-gas detection methods are no longer sufficient for practical needs. For corrosive specialty gas cylinders (such as those containing hydrogen fluoride or boron trichloride), trace amounts of corrosive media may remain on their inner walls due to long-term filling. If air (containing active components such as oxygen, moisture, and carbon dioxide) is used as the detection gas, the active components in the air may react secondaryly with the residual corrosive media inside the cylinder (e.g., forming hydrofluoric acid or hydrochloric acid), leading to further corrosion of the cylinder's inner wall. This not only affects the accuracy of the detection results (impurities generated by corrosion may block leakage channels or alter the sealing surface) but may also exacerbate cylinder damage. Therefore, these types of cylinders require the use of chemically stable inert gases (such as nitrogen or argon) as the detection gas to avoid reactions with the cylinder and residual media.

[0004] For conventional specialty gas cylinders (such as those filled with non-corrosive gases like oxygen, nitrogen, and carbon dioxide), the inner wall material is mostly ordinary alloy steel, and the gases themselves are not highly reactive. While using inert gas for testing these cylinders can ensure safety, it significantly increases testing costs (inert gas procurement and purification are expensive). Air, on the other hand, is widely available and inexpensive, and its components (mainly nitrogen and oxygen) do not react with the cylinder or any residual gas inside, fully meeting the requirements for seal testing. Utility Model Content

[0005] This utility model provides a solution that is significantly different from existing technologies, addressing the problem that existing technologies are too simplistic. It mainly provides a gas cylinder sealing detection device to solve the problem that the single gas detection method mentioned in the background technology can no longer meet practical needs.

[0006] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: A gas cylinder sealing test device includes a processing table and a gas delivery assembly. A lifting assembly is provided above the processing table, and the lifting assembly can drive a sealing head to move. The sealing head is used to seal the open end of the gas cylinder, and a connecting pipe is provided inside the sealing head. The gas delivery assembly delivers gas into the gas cylinder through the connecting pipe, and the gas delivery assembly is connected to the gas outlet of the gas tank. A first gas inlet and a second gas inlet are provided on both sides of the gas tank, and the first gas inlet is connected to a gas storage tank through a connecting pipe assembly.

[0007] Preferably, a limiting cylinder for use with the gas cylinder is installed on the top of the processing table below the sealing head.

[0008] Preferably, the lifting assembly includes an electric lead screw assembly, and the electric lead screw assembly can drive a sliding block inside the mounting slot to perform vertical displacement, and the sliding block can drive the mounting platform to perform synchronous displacement.

[0009] Preferably, the connecting pipe is equipped with a pressure detector for detecting the internal gas pressure of the gas cylinder, and a matching valve is installed inside the connecting pipe.

[0010] Preferably, the air box has an inner cavity that is connected to the air outlet, the first air inlet and the second air inlet. A sealing plate is installed inside the inner cavity, and a drive motor for rotating the sealing plate is provided on the top of the outer side of the air box.

[0011] Preferably, the connecting pipe assembly includes a connecting pipe, and one end of the connecting pipe is connected to the telescopic pipe.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: By cooperating with the drive motor through the sealing plate inside the gas box, the rotation of the sealing plate can switch the connection state between the first air inlet and the second air inlet, thereby enabling the device to detect the gas cylinder through either the inert gas in the gas storage tank or the external gas, thus meeting the detection requirements of different types of special gas cylinders. (2) By using the pressure detector on the connecting pipe in conjunction with the valve, the pressure detector can monitor the gas pressure inside the cylinder in real time. When the pressure reaches the preset value, the valve closes and enters the pressure holding stage. In this way, the cylinder's sealing performance can be judged by the pressure change, thereby achieving automated detection and improving detection efficiency.

[0013] The present invention will be explained in detail below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the overall front view of the present invention; Figure 3 This utility model Figure 1 Enlarged structural diagram at point A in the middle; Figure 4 This is a top view cross-sectional structural diagram of the air box of this utility model.

[0015] Numbering on the map: 1. Processing table; 2. Lifting assembly; 201. Electric lead screw assembly; 202. Mounting platform; 3. Sealing head; 4. Gas cylinder; 5. Connecting pipe; 501. Pressure detector; 6. Gas delivery assembly; 7. Gas box; 701. Inner cavity; 702. Sealing plate; 703. Drive motor; 8. Connecting pipe assembly; 9. Gas storage tank. Detailed Implementation

[0016] To facilitate understanding of this utility model, a more comprehensive description of the utility model will be given below with reference to the accompanying drawings, which show several embodiments of the utility model. However, the utility model can be implemented in different forms and is not limited to the embodiments described in the text. On the contrary, these embodiments are provided to make the disclosure of the utility model more thorough and comprehensive.

[0017] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0018] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly associated with those skilled in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0019] Please refer to the appendix carefully. Figure 1-4 A gas cylinder sealing test device is provided, with a lifting assembly 2 above the processing table 1. The lifting assembly 2 includes an electric lead screw assembly 201, which can drive a sliding block inside the mounting groove to perform vertical displacement. The electric lead screw assembly 201 includes a lead screw motor, and the output end of the lead screw motor is connected to the lead screw assembly through a coupling. When the lead screw motor is started, the lead screw assembly rotates along its own axis, causing the sliding block (with a "T" shaped cross section) sleeved on the outside of the lead screw assembly to slide stably vertically along the mounting groove.

[0020] The movable block can drive the mounting platform 202 to move synchronously, and the lifting component 2 can drive the sealing head 3 to move. The sealing head 3 is used to seal the opening end of the gas cylinder 4. The end face of the sealing head 3 that contacts the opening end of the gas cylinder 4 is embedded with an annular sealing gasket. The side wall of the sealing head 3 is provided with an annular groove and an O-ring is built in it to further enhance the gap sealing with the outer side wall of the opening end of the gas cylinder 4, forming a double sealing guarantee.

[0021] The top of the processing table 1 is equipped with a limiting cylinder that works with the gas cylinder 4, located below the sealing head 3. The limiting cylinder can restrict the position of the gas cylinder 4 to a certain extent.

[0022] The sealing head 3 is equipped with a connecting pipe 5. The connection between the connecting pipe 5 and the sealing head 3 is sealed by welding to form an integrated structure without dead angles. The connecting pipe 5 is equipped with a pressure detector 501 for detecting the gas pressure inside the cylinder 4, and a matching valve is installed inside the connecting pipe 5. The gas delivery assembly 6 delivers gas to the cylinder 4 through the connecting pipe 5. The gas delivery assembly 6 can be a delivery pump.

[0023] The gas delivery assembly 6 is connected to the gas outlet of the gas box 7. The gas box 7 has a first air inlet and a second air inlet on both sides. The gas box 7 has a cylindrical inner cavity 701 inside, which is connected to the gas outlet, the first air inlet and the second air inlet. A matching and well-sealed sealing plate 702 is installed inside the cylindrical inner cavity 701. A drive motor 703 is installed on the top of the outer side of the gas box 7 to drive the sealing plate 702 to rotate. The top of the gas box 7 has an installation structure adapted to the drive motor 703. A sealing assembly is provided at the part of the drive motor 703 that passes through the top of the gas box 7 to prevent gas leakage later.

[0024] The first air inlet is connected to the gas storage tank 9 through the connecting pipe assembly 8. The gas storage tank 9 is filled with inert gas. The connecting pipe assembly 8 includes a connecting pipe, and one end of the connecting pipe is connected to the telescopic pipe through a connector.

[0025] The specific operating procedure of this utility is as follows: Place the steel cylinder 4 to be tested in the limiting cylinder at the top of the processing table 1 to ensure that the steel cylinder 4 is placed vertically and stably. After placement, start the electric screw assembly 201 in the lifting assembly 2. The screw motor drives the moving block to lower the mounting table 202. The sealing head 3 descends with the mounting table 202 until it contacts the opening end of the steel cylinder 4, forming a double seal through the annular sealing gasket and the O-ring.

[0026] When inert gas is required for testing of cylinder 4, the sealing plate 702 is rotated to a certain angle. At this time, the outlet and the first inlet are located on one side of the sealing plate 702. The gas delivery assembly 6 is turned on. Under the action of the gas delivery assembly 6, the inert gas in the gas storage tank 9 enters the inner cavity 701 through the connecting pipe assembly 8, flows out through the outlet, and enters the inside of cylinder 4 through the connecting pipe 5. The pressure detector 501 monitors the pressure inside cylinder 4 in real time. When the pressure rises to the preset detection value, the gas delivery assembly 6 automatically stops, and the valve inside the connecting pipe 5 immediately closes, entering the pressure holding stage. During the pressure holding period, the pressure detector 501 monitors the gas pressure inside cylinder 4 in real time. If the pressure drops beyond the threshold, it indicates that there is a leak.

[0027] When the gas cylinder 4 does not require inert gas for testing, the drive motor 703 drives the sealing plate 702 to rotate. At this time, the outlet and the second inlet are located on one side of the sealing plate 702. The gas delivery component 6 is turned on. Under the action of the gas delivery component 6, the outside gas enters the inner cavity 701 through the second inlet, flows out through the outlet, and enters the inside of the gas cylinder 4 through the connecting pipe 5 for testing. The testing steps are as described above.

[0028] The present invention has been described above by way of example in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvement made by adopting the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution of the present invention to other occasions without modification, shall be within the protection scope of the present invention.

Claims

1. A steel bottle tightness detection device, characterized by: The equipment includes a processing table (1) and a gas delivery assembly (6). A lifting assembly (2) is provided above the processing table (1), and the lifting assembly (2) can drive the sealing head (3) to move. The sealing head (3) is used to seal the opening end of the gas cylinder (4), and a connecting pipe (5) is provided inside the sealing head (3). The gas delivery assembly (6) delivers gas to the inside of the gas cylinder (4) through the connecting pipe (5), and the gas delivery assembly (6) is connected to the gas outlet of the gas box (7). The gas box (7) has a first air inlet and a second air inlet on both sides, and the first air inlet is connected to the gas storage tank (9) through a connecting pipe assembly (8).

2. The steel bottle leak detection device according to claim 1, wherein: The top of the processing table (1) is located below the sealing head (3) and is equipped with a limiting cylinder that works in conjunction with the steel cylinder (4).

3. The device for detecting the sealing property of a steel bottle according to claim 1, wherein: The lifting assembly (2) includes an electric screw assembly (201), and the electric screw assembly (201) can drive a sliding block inside the mounting slot to make vertical displacement, and the sliding block can drive the mounting platform (202) to make synchronous displacement.

4. The device for detecting the sealing property of a steel bottle according to claim 1, wherein: The connecting pipe (5) is equipped with a pressure detector (501) for detecting the internal gas pressure of the gas cylinder (4), and a matching valve is installed inside the connecting pipe (5).

5. The device for detecting the sealing property of a steel bottle according to claim 1, wherein: The air box (7) has an inner cavity (701) inside, and the inner cavity (701) is connected to the air outlet, the first air inlet and the second air inlet. A sealing plate (702) is installed inside the inner cavity (701), and a drive motor (703) for driving the sealing plate (702) to rotate is provided on the top of the outer side of the air box (7).

6. The device for detecting the sealing property of a steel bottle according to claim 1, wherein: The connecting pipe assembly (8) includes a connecting pipe, and one end of the connecting pipe is connected to the telescopic pipe.

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