Device for testing air tightness of acetylene steel cylinder

Abstract

The utility model discloses an acetylene steel cylinder airtightness testing device which comprises a detection main body, the detection main body is of an inverted-U-shaped structure, and a transverse plate at the upper end of the detection main body is provided with a lifting type vacuum cover capable of moving up and down relative to the detection main body. The lifting type vacuum cover descends to form a closed space with a steel cylinder placing plate arranged at the lower end part of the detection main body, and a vacuum pump connected with the lifting type vacuum cover is used for vacuumizing; a leaked gas collecting bottle is fixedly arranged in the detection main body, and a gas outlet of the vacuum pump is connected with the leaked gas collecting bottle through a three-way valve and is used for collecting gas after the steel cylinder leaks. According to the device disclosed by the invention, the air tightness of the steel cylinder is tested by utilizing the vacuum degree in the closed space, and when the steel cylinder leaks, the leaked gas in the closed space is pumped into the safe collection bottle by utilizing the vacuum pump, so that acetylene gas is prevented from leaking into the air and polluting the environment, and meanwhile, the occurrence probability of accidents can also be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of a gas-tightness test device for a steel cylinder, in particular to a gas-tightness test device for an acetylene steel cylinder. Background Art

[0002] Acetylene is an organic compound with the chemical formula C2H2, commonly known as wind coal or carbide gas. It is the smallest member of the alkyne compounds. It is a colorless gas at room temperature and pressure. It is slightly soluble in water, soluble in ethanol, acetone, chloroform, benzene, and miscible in ether. It is one of the important raw materials for organic synthesis, and is also a monomer for synthetic rubber, synthetic fiber and plastic. It can also be used for oxyacetylene welding and cutting. Acetylene is generally installed in steel cylinders for transportation, but in order to ensure that the acetylene in the steel cylinder will not leak into the air and affect the environment, it is often necessary to test the air tightness of the steel cylinder before transportation.

[0003] At present, water pressure testing systems are mostly used to detect the air tightness of cylinders, such as patent number CN217901120U, which is called a heptafluoropropane cylinder air tightness testing device. However, during the test, the transportation of the cylinders is cumbersome and dangerous. Moreover, if the acetylene cylinder leaks, it will cause serious pollution to the working environment. In particular, acetylene is a flammable gas, which may cause a fire in serious cases. Utility Model Content

[0004] In view of the above-mentioned defects or deficiencies in the prior art, it is desirable to provide an acetylene cylinder air tightness testing device.

[0005] According to the technical solution provided in the embodiment of the present application, an acetylene cylinder air tightness testing device includes a detection body, which is an inverted U-shaped structure. A lifting vacuum hood that can move up and down relative to the detection body is provided on a horizontal plate at the upper end of the detection body. The lifting vacuum hood descends to form a closed space with a cylinder placement plate provided at the lower end of the detection body, and a vacuum is drawn by a vacuum pump connected to the lifting vacuum hood. A leaking gas collecting bottle is fixedly provided in the detection body, and the outlet of the vacuum pump is connected to the leaking gas collecting bottle through a three-way valve for collecting gas after the cylinder leaks.

[0006] Furthermore, the lifting vacuum hood is slidably connected to the horizontal plate through a slider, and a slide rail is provided on the outer end surface of the lifting vacuum hood. The lifting vacuum hood is lifted and lowered by a transmission device fixed on the horizontal plate, thereby realizing automatic lifting and lowering of the lifting vacuum hood and the stability of its lifting and lowering.

[0007] Furthermore, the transmission device includes a transmission motor and a rotating gear. The transmission motor is fixedly connected to the rotating gear. The rotating gear meshes with gear teeth arranged on the outer end surface of the lifting vacuum cover to realize the lifting of the lifting vacuum cover.

[0008] Furthermore, the lifting vacuum hood is connected to the vacuum pump via a spiral exhaust pipe, and the exhaust pipe can be extended, so that the lifting and lowering of the lifting vacuum hood does not affect the connection with the vacuum pump.

[0009] Furthermore, a vacuum cover is provided on the cylinder placement plate to prevent the gas in the enclosed space from being discharged and the external gas from entering the enclosed space.

[0010] Furthermore, the vacuum cover is connected to the lifting vacuum cover through a thread, and the vacuum cover is horizontally rotated by a rotating motor fixed on the cylinder placement plate, which increases the sealing of the enclosed space while realizing full-automatic connection.

[0011] Furthermore, a gas pressure gauge is provided on the vacuum cover and is connected to the control device on the detection body, so that the vacuum degree or gas pressure in the enclosed space can be observed at any time through the numerical value.

[0012] Furthermore, a control panel is provided on the detection body, making operation more convenient.

[0013] To sum up, the beneficial effects of the present application are as follows: the device of the present application utilizes the vacuum degree in a confined space to test the air tightness of a cylinder, and when a leak occurs in the cylinder, a vacuum pump is used to draw the leaked gas in the confined space into a safe collection bottle, thereby preventing acetylene gas from leaking into the air and polluting the environment, while also reducing the probability of accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0015] Figure 1 It is a structural schematic diagram of the overall device of the utility model;

[0016] Figure 2 This is a schematic diagram of the connection structure of the leaked gas collection bottle, the vacuum pump and the lifting vacuum cover of the utility model;

[0017] Figure 3 This is a schematic diagram of the exploded structure of the lifting vacuum hood and the vacuum hood cover of the utility model;

[0018] Figure 4 This is a cross-sectional view of the connection structure between the vacuum cover and the rotating motor of the utility model;

[0019] Figure 5 The utility model is a schematic diagram of the connection structure between the lifting vacuum cover and the transmission device.

[0020] The numbers in the figure are: detection body-1; horizontal plate-11; lifting vacuum cover-2; slide rail-21; gear tooth-22; cylinder placement plate-3; vacuum pump-4; leaking gas collection bottle-5; transmission device-6; transmission motor-61; rotating gear-62; vacuum cover-7; rotating motor-8. DETAILED DESCRIPTION

[0021] The present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the relevant invention, rather than to limit the invention. It is also necessary to explain that, for ease of description, only the parts related to the invention are shown in the accompanying drawings.

[0022] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0023] Acetylene cylinder air tightness test device, such as Figure 1 and Figure 2 As shown, the detection body 1 is an inverted U-shaped structure, a leaked gas collecting bottle 5 is fixedly provided in the box body at the left end of the detection body 1, a lifting vacuum cover 2 which can move up and down relative to the detection body 1 is provided on the horizontal plate 11 of the detection body 1, the lifting vacuum cover 2 is connected to the air inlet of the vacuum pump 4 fixed on the detection body 1 through a spiral exhaust pipe, and the air outlet of the vacuum pump 4 is connected to the leaked gas collecting bottle 5 through a three-way valve, that is, the three-way valve connected to the vacuum pump 4, one valve is connected to the leaked gas collecting bottle 5, and the other valve is connected to the air outside the lifting vacuum cover 2, and a steel cylinder placing plate 3 fixedly connected to the detection body 1 is provided directly below the lifting vacuum cover 2, and a closed space is formed after the lifting vacuum cover 2 and the steel cylinder placing plate 3 are abutted;

[0024] like Figure 3 As shown, a vacuum cover 7 is provided on the upper end surface of the cylinder placement plate 3 to realize the enclosed space of the lifting vacuum cover 2.

[0025] like Figure 3 and Figure 4 As shown, the inner end surface of the vacuum cover 7 is provided with a thread, and the thread of the inner end surface of the vacuum cover 7 is connected with the thread of the lower end of the lifting vacuum cover 2, so that the closed space formed by the lifting vacuum cover 2 and the vacuum cover 7 has a certain vacuum degree, and the vacuum cover 7 is fixed on the cylinder placement plate 3 through a bearing, and the vacuum cover 7 is rotated in the horizontal direction by a rotating motor 8;

[0026] like Figure 1 and Figure 5As shown, the outer end surface of the lifting vacuum hood 2 is provided with a slide rail 21, and the lifting vacuum hood 2 is slidably connected to the horizontal plate 11 through a slider, so that the lifting vacuum hood 2 can move up and down relative to the horizontal plate 11 of the detection body 1; and the lifting vacuum hood 2 is lifted and lowered by a transmission device 6 fixed on the horizontal plate 11, and the transmission motor 61 is fixedly connected to the rotating gear 62, and the rotating gear 62 is meshed with the gear teeth 22 set on the outer end surface of the lifting vacuum hood 2.

[0027] Before use, the sealing degree between the lifting vacuum cover 2 and the vacuum cover 7 can be tested first. Only when the sealing degree between the lifting vacuum cover 2 and the vacuum cover 7 meets the requirements, the acetylene cylinder can be tested;

[0028] The lifting vacuum hood 2 is raised through the transmission device 6, and then the acetylene cylinder to be tested is inflated and pushed into the vacuum cover 7 of the cylinder placement plate 3, and the cylinder is vertically fixed in the vacuum cover 7, and then the transmission device 6 is started to make the lifting vacuum hood 2 descend. When the lower end of the lifting vacuum hood 2 is located at the upper end surface of the vacuum cover 7, the rotating motor 8 is started to make the vacuum cover 7 rotate horizontally. During the rotation of the vacuum cover 7, the lifting vacuum hood 2 continues to descend. At this time, the lifting vacuum hood 2 can be rotated into the vacuum cover 7 to obtain a closed space;

[0029] Then start the vacuum pump 4, evacuate the sealed space to the set vacuum degree, let it stand for a while, and then observe the vacuum degree in the enclosed space through the gas pressure gauge on the lifting vacuum cover 2. If the vacuum degree does not change, it means that the airtightness of the acetylene cylinder is very good and there is no acetylene gas leakage; if the vacuum degree changes, it means that gas has leaked from the acetylene cylinder into the enclosed space, causing the gas pressure in the enclosed space to change. At this time, start the vacuum pump 4 to draw the leaked gas into the leaked gas collection bottle 5 until the vacuum degree in the enclosed space reaches the set value, which means that the leaked gas has been exhausted and the detection is completed.

[0030] The lifting vacuum cover 2 of the present solution is provided with an electronic switch valve for changing the vacuum degree in the enclosed space, so that air can enter the enclosed space, which is convenient for opening the enclosed space.

[0031] The above description is only an explanation of the preferred embodiments of the present application and the technical principles and other schemes used. At the same time, the scope of the invention involved in the present application is not limited to the technical scheme formed by a specific combination of the above technical features, but also should cover other technical schemes formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the above features are replaced with the technical features with similar functions disclosed in the present application (but not limited to) by each other to form a technical scheme.

Claims

1. An acetylene cylinder air tightness test device, comprising a detection body (1), characterized in that: The detection body (1) is an inverted U-shaped structure. A lifting vacuum cover (2) is provided on a horizontal plate (11) at the upper end of the detection body (1) and can move up and down relative to the detection body (1). The lifting vacuum cover (2) descends to form a closed space with a cylinder placement plate (3) provided at the lower end of the detection body (1). A vacuum is drawn by a vacuum pump (4) connected to the lifting vacuum cover (2). A leaked gas collection bottle (5) is fixedly arranged inside the detection body (1), and the gas outlet of the vacuum pump (4) is connected to the leaked gas collection bottle (5) via a three-way valve, so as to collect gas after the cylinder leaks.

2. The acetylene cylinder air tightness testing device according to claim 1, characterized in that: The lifting vacuum hood (2) is slidably connected to the transverse plate (11) via a slider, a slide rail (21) is provided on the outer end surface of the lifting vacuum hood (2), and the lifting vacuum hood (2) is lifted and lowered by a transmission device (6) fixed on the transverse plate (11).

3. The acetylene cylinder air tightness testing device according to claim 2, characterized in that: The transmission device (6) comprises a transmission motor (61) and a rotating gear (62); the transmission motor (61) is fixedly connected to the rotating gear (62); and the rotating gear (62) meshes with gear teeth (22) arranged on the outer end surface of the lifting vacuum cover (2).

4. The acetylene cylinder air tightness testing device according to claim 1, characterized in that: The lifting vacuum cover (2) is connected to the vacuum pump (4) via a spiral exhaust pipe.

5. The acetylene cylinder air tightness testing device according to claim 1, characterized in that: The steel cylinder placement plate (3) is provided with a vacuum cover (7).

6. The acetylene cylinder air tightness testing device according to claim 5, characterized in that: The vacuum cover (7) is connected to the lifting vacuum cover (2) via threads.

7. The acetylene cylinder air tightness testing device according to claim 6, characterized in that: The vacuum cover (7) is rotated horizontally by a rotating motor (8) fixed on the cylinder placement plate (3).

8. The acetylene cylinder air tightness testing device according to claim 7, characterized in that: The vacuum cover (7) is provided with a gas pressure gauge, and is connected to a control device on the detection body (1).

9. The acetylene cylinder air tightness testing device according to claim 1, characterized in that: The detection body (1) is provided with a control panel.

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