Air tightness detection device for air cylinder

Abstract

The utility model provides an air cylinder air tightness detection device, and relates to the technical field of air tightness detection. The air cylinder leak detection device comprises a frame main body, a fixed frame and an air cylinder, the bottom of the frame main body is provided with a leak detection water tank, the top of the frame main body is provided with a slide rail, the slide rail is movably connected with the fixed frame, the fixed frame comprises a top plate, a back plate and a bottom plate, the top plate is provided with a pressing mechanism used for fixing and pressing the air cylinder, and the pressing mechanism comprises a pressing cylinder and a pressing plate. A pressing rod of the pressing air cylinder penetrates through the top plate to be connected with a pressing plate with a pressing wheel at the bottom, an air cylinder is placed on the bottom plate, a sliding block matched with the sliding rail and a lifting mechanism are arranged on the back plate, the lifting mechanism drives the fixing frame to move up and down along the sliding rail, and the air cylinder placed on the bottom plate of the fixing frame is completely immersed into water of the leak detection water tank. According to the utility model, the safety and the detection efficiency of the air tightness detection of the air cylinder are improved, and the personal safety in the air tightness detection process of the air cylinder is effectively guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of air tightness detection, in particular to an air storage cylinder air tightness detection device. Background Art

[0002] As a common pressure vessel for storing compressed gas, the gas cylinder needs to undergo an underwater air tightness test before use to detect its air tightness and avoid leakage due to unqualified welding of the gas cylinder, which will affect the use of the gas cylinder.

[0003] During the air tightness test of the air cylinder, the air cylinder filled with pressurized gas needs to be immersed in water as a whole to observe whether there is bubbling or leakage in the air cylinder during the test. If the air cylinder maintains pressure for a certain period of time without bubbling or leakage, it means that the air tightness test of the air cylinder is qualified.

[0004] At present, due to the large size of the gas cylinder, it is difficult to immerse it in water for air tightness testing manually, and there are certain safety hazards in the manual squeezing and immersion process. Therefore, it is urgent to propose an air tightness testing device for the gas cylinder to improve the safety and efficiency of the air tightness testing of the gas cylinder. Utility Model Content

[0005] The purpose of the utility model is to solve the above-mentioned deficiencies in the prior art and provide a gas cylinder air tightness detection device, which effectively improves the safety and detection efficiency of the gas cylinder air tightness detection and ensures the safe use of the gas cylinder.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] An air storage cylinder air tightness detection device comprises a frame body, a fixed frame and an air storage cylinder;

[0008] The bottom of the frame body is provided with a leak detection tank, and the top is vertically provided with a pair of slide rails; the slide rails are movably connected with the fixed frame, and the fixed frame moves up and down along the slide rails;

[0009] The fixed frame includes a top plate, a back plate and a bottom plate; a pressing mechanism is arranged on the top plate of the fixed frame, and the gas storage cylinder is placed on the bottom plate of the fixed frame; the back plate includes a pair of vertical support plates and a horizontal support plate, the vertical support plate is located between the top plate and the bottom plate, a slider matching the slide rail is arranged on the vertical support plate, the horizontal support plate is arranged between the pair of vertical support plates, and a lifting mechanism is arranged on the horizontal support plate;

[0010] The pressing mechanism includes a pressing cylinder and a pressing plate, which are used to press the air storage cylinder downward to fix it; the pressing cylinder is fixed to the top surface of the top plate of the fixed frame, the pressing rod of the pressing cylinder passes through the top plate and is connected to the top surface of the pressing plate, and the bottom surface of the pressing plate is provided with a plurality of pressing wheels for fixing the air storage cylinder;

[0011] The lifting mechanism is fixed on the transverse supporting plate and is used to control the lifting and lowering of the fixed frame.

[0012] Preferably, the pressing mechanism is further provided with a pair of guide columns, which are symmetrically arranged on both sides of the clamping cylinder and pass through the top plate to be fixed to the clamping plate. Linear bearings are arranged on the guide columns, and the linear bearings are interference fit with the guide columns.

[0013] Preferably, a plurality of bottom support plates are arranged at intervals on the bottom plate, and hollow portions are formed between adjacent bottom support plates.

[0014] Preferably, the lifting mechanism is arranged as a press-in cylinder.

[0015] Preferably, the pressure wheels are polyurethane pressure wheels, and the number is 4.

[0016] Preferably, the gas storage cylinder is provided with a plurality of interfaces, and each interface is provided with a Grayhill tapered pipe thread sealing test joint.

[0017] Beneficial technical effects brought by the utility model:

[0018] The utility model proposes an air tightness detection device for gas cylinders, which solves the problem of manual squeezing and immersion in liquid during the air tightness detection of gas cylinders, avoids personal injury caused by sudden explosion during the air tightness detection of gas cylinders, and effectively ensures the safety of air tightness detection of gas cylinders. In addition, the air tightness detection device for gas cylinders proposed by the utility model has a compact structure, is easy to operate, and has a high degree of automation, and is easy to promote and use on site. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The utility model is a schematic diagram of the structure of the gas storage cylinder air tightness detection device.

[0020] Figure 2 It is a front view of the gas storage cylinder air tightness detection device of the utility model.

[0021] Figure 3 It is a side view of the gas storage cylinder air tightness detection device of the utility model.

[0022] Figure 4 It is a rear view of the gas storage cylinder air tightness detection device of the utility model.

[0023] In the figure: 1. frame body, 2. fixed frame, 3. air storage cylinder, 4. leak detection tank, 5. slide rail, 6. top plate, 7. back plate, 8. bottom plate, 9. clamping cylinder, 10. clamping plate, 11. polyurethane clamping wheel, 12. guide column, 13. linear bearing, 14. press-in cylinder, 15. Grayhill tapered pipe thread sealing test joint. DETAILED DESCRIPTION

[0024] It should be noted that the following detailed descriptions are illustrative and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.

[0025] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0026] In the present invention, the directions or positional relationships indicated by terms such as "upper", "lower", "bottom", "top", etc. are based on the directions or positional relationships shown in the accompanying drawings. They are relational words determined only for the convenience of describing the structural relationships of the various parts or elements of the present invention. They do not specifically refer to any part or element in the present invention and cannot be understood as limitations on the present invention.

[0027] In the present utility model, terms such as "connected" and "connection" should be understood in a broad sense, indicating that the connection can be fixed, integral or detachable; it can be directly connected or indirectly connected through an intermediate medium. For relevant scientific research or technical personnel in this field, the specific meaning of the above terms in the present utility model can be determined according to specific circumstances, and it cannot be understood as a limitation of the present utility model.

[0028] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0029] This embodiment discloses a gas storage cylinder air tightness detection device, such as Figures 1 to 4 As shown, it includes a frame body 1, a fixed frame 2 and an air storage cylinder 3.

[0030] A leak detection water tank 4 is provided at the bottom of the frame body, and a pair of slide rails 5 are vertically provided at the top. The slide rails are movably connected to the fixed frame, and the fixed frame can move up and down along the slide rails to immerse the gas storage cylinder in the leak detection water tank for air tightness detection.

[0031] The fixed frame includes a top plate 6, a back plate 7 and a bottom plate 8, wherein a pressing mechanism is arranged on the top plate of the fixed frame, and an air cylinder is arranged on the bottom plate. In this embodiment, the bottom plate is formed by a plurality of bottom support plates arranged at equal intervals, and a hollow portion is formed between adjacent bottom support plates, so that the water in the leak detection tank can pass through so that the air cylinder is completely immersed in water. The pressing mechanism shown is used to press down and fix the air cylinder on the bottom plate, including a clamping cylinder 9 and a clamping plate 10. The clamping cylinder is fixed to the top surface of the top plate of the fixed frame, and the pressure rod of the clamping cylinder passes through the top plate and is connected to the top surface of the clamping plate. The bottom surface of the clamping plate is provided with two pairs of polyurethane clamping wheels 11 for fixing the air cylinder. In order to cooperate with the vertical downward pressure of the pressing mechanism, a pair of guide columns 12 are symmetrically arranged on both sides of the clamping cylinder in this embodiment. The guide columns pass through the top plate and are fixed to the clamping plate. A linear bearing 13 is arranged on the guide column. The linear bearing and the guide column have an interference fit, so as to realize the precise control of the downward pressure direction of the clamping cylinder.

[0032] The back plate 7 includes a pair of vertical support plates and a transverse support plate. The vertical support plates are located between the top plate and the bottom plate. A slider matching the slide rail is provided on the vertical support plates. The slider moves up and down along the slide rail, thereby driving the fixed frame to move along the slide rail, controlling the fixed frame to move down and immerse in the leak detection tank. A transverse support plate is provided between the pair of vertical support plates. A lifting mechanism is provided on the transverse support plate to control the lifting of the fixed frame. In this embodiment, the lifting mechanism is configured as a press-in cylinder 14. The pressure rod of the press-in cylinder 14 is fixedly connected to the transverse support plate to drive the fixed frame to move up and down along the slide rail.

[0033] At the same time, the air storage cylinder 3 is provided with multiple interfaces, and a Gleshill tapered pipe threaded sealing test joint 15 is provided at each interface. In this embodiment, the air storage cylinder is provided with an external interface, an air inlet and an air outlet, and the external interface, the air inlet and the air outlet are respectively installed with a Gleshill tapered pipe threaded sealing test joint.

[0034] The above-mentioned gas cylinder air tightness detection device is applied to the gas storage tank air tightness detection, which specifically includes the following steps:

[0035] Step 1: Fill the leak detection tank with pure water, connect the air inlet of the air cylinder with the inflation device through the inflation pipe, install the Grayhill tapered pipe thread sealing test joints on each interface on the air cylinder to seal, and then place the air cylinder on the bottom plate.

[0036] Step 2, control the pressing cylinder of the pressing mechanism to press down, so that the polyurethane pressing wheel at the bottom of the pressing plate is in close contact with the top of the air storage cylinder, and use the pressing plate to press the air storage cylinder onto the bottom plate of the fixed frame.

[0037] Step 3, control the lifting mechanism to drive the fixed frame to move downward along the slide rail of the frame body. When the air storage cylinder is completely immersed in the water of the leak detection tank, close the lifting mechanism to stop the fixed frame from moving downward, open the inflation valve on the inflation pipe, use the inflation equipment to inject 0.5MPa compressed air into the air storage cylinder to a specified volume, and then close the inflation valve;

[0038] Step 4, observe whether the gas cylinder placed in the test water tank has bubbling and leakage. If bubbling and leakage occur, it is verified that the air tightness of the gas cylinder is unqualified; otherwise, it is verified that the air tightness of the gas cylinder is qualified.

[0039] It can be seen that the utility model solves the problem of safety risks caused by manual squeezing of immersion liquid during air tightness testing of gas cylinders, effectively avoids personal injury and property loss caused by sudden explosion of pressurized gas during air tightness testing of gas cylinders, improves the safety and efficiency of air tightness testing of gas cylinders, and provides technical support for ensuring the safe use of gas cylinders.

[0040] Although the above describes the specific implementation mode of the utility model in combination with the accompanying drawings, it is not a limitation of the utility model. Technical personnel in the relevant field should understand that on the basis of the technical solution of the utility model, various modifications or deformations that can be made by technical personnel in this field without creative work are still within the protection scope of the utility model.

Claims

1. A gas cylinder air tightness detection device, characterized in that: It includes a frame body, a fixed frame and an air storage cylinder; The bottom of the frame body is provided with a leak detection tank, and the top is vertically provided with a pair of slide rails; the slide rails are movably connected with the fixed frame, and the fixed frame moves up and down along the slide rails; The fixed frame includes a top plate, a back plate and a bottom plate; a pressing mechanism is arranged on the top plate of the fixed frame, and the gas storage cylinder is placed on the bottom plate of the fixed frame; the back plate includes a pair of vertical support plates and a horizontal support plate, the vertical support plate is located between the top plate and the bottom plate, a slider matching the slide rail is arranged on the vertical support plate, the horizontal support plate is arranged between the pair of vertical support plates, and a lifting mechanism is arranged on the horizontal support plate; The pressing mechanism includes a pressing cylinder and a pressing plate, which are used to press the air storage cylinder downward to fix it; the pressing cylinder is fixed to the top surface of the top plate of the fixed frame, the pressing rod of the pressing cylinder passes through the top plate and is connected to the top surface of the pressing plate, and the bottom surface of the pressing plate is provided with a plurality of pressing wheels for fixing the air storage cylinder; The lifting mechanism is fixed on the transverse supporting plate and is used to control the lifting and lowering of the fixed frame.

2. The gas cylinder air tightness detection device according to claim 1, characterized in that: The pressing mechanism is also provided with a pair of guide columns, which are symmetrically arranged on both sides of the clamping cylinder and pass through the top plate to be fixed to the clamping plate. The guide columns are provided with linear bearings, which are interference fit with the guide columns.

3. The gas cylinder air tightness detection device according to claim 2, characterized in that: The bottom plate is provided with a plurality of bottom support plates at intervals, and hollow portions are formed between adjacent bottom support plates.

4. The gas cylinder air tightness detection device according to claim 1, characterized in that: The lifting mechanism is arranged to be pressed into a cylinder.

5. The gas cylinder air tightness detection device according to claim 1, characterized in that: The clamping wheels are polyurethane clamping wheels, and there are four of them.

6. The gas cylinder air tightness detection device according to claim 1, characterized in that: The gas storage cylinder is provided with a plurality of interfaces, and each interface is provided with a Grayhill tapered pipe thread sealing test joint.

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