High-pressure air tightness test bench

Abstract

The utility model relates to the technical field of air pressure testing, in particular to a high-pressure air tightness test bench, which comprises a cabinet, a supercharging device and a detection device. The cabinet is provided with a control panel and a detection cavity, the supercharging device is arranged in the detection cavity, and the supercharging device is provided with a booster pump. The detection device is provided with a storage rack, the storage rack is provided with a limiting block and an automatic sealing assembly, an inflation connector of the automatic sealing assembly can move towards the limiting block to be adjusted, and the input end of the inflation connector is provided with a three-phase valve communicated with the booster pump and the barometer. During work, a standard steel cylinder is placed on the storage rack, the posture is adjusted through the limiting block, the air inlet valve is aligned with the inflation connector and connected with the inflation connector, the booster pump pumps high-pressure gas to the specified pressure, and the three-phase valve is communicated with the barometer to collect pressure change data. The design is high in automation degree, the working efficiency and the safety performance are improved, and manual participation is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of air pressure test, specifically, relate to a high pressure air tightness test board. BACKGROUND

[0002] In the field of power system equipment manufacturing, air tightness detection as the core technical link of guaranteeing system safe operation, its detection precision and reliability directly affect the overall performance and service life of equipment. With the rapid development of new energy power system, aerospace power device and other high-tech fields, air tightness detection is more and more important. The traditional air tightness detection method has bubble method and pressure decay method, etc., the bubble method is immersed in water, then a certain pressure gas is filled in the workpiece. If the workpiece exists leakage, gas will escape from the leakage, and form bubbles in water, whether the workpiece leaks and the approximate position of the leakage are judged by observing the generation of bubbles, the bubble detection process precision is low. The pressure decay method fills the sealed container with air, reaches the predetermined pressure, and then closes the air source, so that the container is isolated from the air source. Then monitor the pressure change in the container within a period of time. If the container exists leakage, the internal pressure will gradually decrease with the leakage of gas, and the leakage rate is calculated according to the amplitude and time relationship of pressure drop, the detection precision of pressure decay method is high, but the existing detection equipment structure is relatively simple, usually through manual inflation and deflation, the degree of automation is low, the working efficiency is low, and there is safety hazard. CONTENT OF THE UTILITY MODEL

[0003] The utility model aims at at least solving one of the technical problems existing in the prior art. Therefore, the utility model provides a high pressure air tightness test board, which aims at providing an air tightness detection device with high working efficiency and good safety performance.

[0004] According to the high pressure air tightness test board of the utility model embodiment, it comprises:

[0005] The cabinet is provided with a control panel, and a detection cavity is arranged in the cabinet;

[0006] The pressure increasing device is arranged in the detection cavity, and the pressure increasing device is provided with at least one pressure increasing pump;

[0007] The detection device is arranged in the detection cavity, the detection device is provided with a storage rack, one end of the storage rack is provided with a limiting block, an automatic sealing assembly is arranged above the limiting block, the automatic sealing assembly is provided with an inflation interface capable of moving and adjusting towards the limiting block, a three-phase valve is arranged at the input end of the inflation interface, one end of the three-phase valve is communicated with the pressure increasing pump, and the other end of the three-phase valve is communicated with the air pressure gauge.

[0008] According to some embodiments of the utility model, the automatic sealing assembly includes a rack, a cylinder, a first connecting rod, a second connecting rod, a connecting pipe and a gas pipe, the rack is connected with the storage rack, the cylinder is rotationally connected with the rack, the output end of the cylinder is rotationally connected with one end of the first connecting rod, the other end of the first connecting rod is rotationally connected with the rack, the central position of the first connecting rod is rotationally connected with one end of the second connecting rod, the other end of the second connecting rod is rotationally connected with the connecting pipe, the connecting pipe is slidingly connected with the rack, one end of the connecting pipe is in communication with the gas pipe, and the other end of the connecting pipe is in communication with the inflation interface, and the gas pipe is in communication with the three-phase valve.

[0009] According to some embodiments of the utility model, the first connecting rod is in L-shaped structure.

[0010] According to some embodiments of the utility model, a sealing ring is arranged on the inflation interface.

[0011] According to some embodiments of the utility model, the storage rack includes a rack body, a plurality of structure rods are arranged on the rack body, and the plurality of structure rods are distributed in arc shape.

[0012] According to some embodiments of the utility model, the storage rack is provided with a reinforcing rib along the axial direction of the structure rod.

[0013] According to some embodiments of the utility model, the storage rack is provided with an arc-shaped fastening hoop, and two ends of the arc-shaped fastening hoop are detachably connected with the structure rods.

[0014] According to some embodiments of the utility model, all the booster pumps are connected in parallel through pipelines.

[0015] According to some embodiments of the utility model, the control panel is provided with a working indicator light, a power indicator light, an alarm buzzer indicator light, a power switch, an emergency stop button and a liquid crystal display screen.

[0016] According to some embodiments of the utility model, four corners of the bottom of the cabinet are respectively provided with casters, and both sides of the cabinet are respectively provided with handles.

[0017] According to some embodiments of the utility model, the high-pressure air tightness test bench has at least the following beneficial effects:

[0018] According to the scheme of the utility model, the high pressure air tightness test platform includes cabinet, pressure increasing device and detection device, wherein, the cabinet is provided with control panel, the detection cavity is arranged in the cabinet; the pressure increasing device is arranged in the detection cavity, and the pressure increasing device is provided with at least one pressure increasing pump; the detection device is arranged in the detection cavity, and the detection device is provided with the storage rack, one end of the storage rack is provided with the limit block, the automatic sealing assembly is arranged above the limit block, the inflation interface of the automatic sealing assembly can be adjusted to move towards the limit block, the input end of the inflation interface is provided with the three-phase valve, one end of the three-phase valve is communicated with the pressure increasing pump, and the other end of the three-phase valve is communicated with the air pressure gauge. When working, the product to be measured is placed on the storage rack, in the embodiment, the product to be measured is the standard steel cylinder for storing various gases; the attitude of the product to be measured is adjusted through the limit block, the air inlet valve of the product to be measured is aligned with the inflation interface, then the automatic sealing assembly controls the inflation structure to be close to the air inlet valve of the product to be measured and stably connected together, after the high pressure gas is pumped into the product to be measured to reach the specified pressure state through the pressure increasing pump, the air pressure gauge is communicated with the inside of the product to be measured through the three-phase valve, so as to collect the pressure change data in the inside of the product to be measured. Through the design of the structure, the automation degree is high, the work efficiency is improved, the manual participation is reduced, and the safety performance of the scheme is improved. BRIEF DESCRIPTION OF DRAWINGS

[0019] Fig. 1 It is a structural schematic view of the utility model;

[0020] Fig. 2 It is a structural schematic view of the detection device of the utility model;

[0021] Fig. 3 It is a structural schematic view of the automatic sealing assembly of the utility model.

[0022] In the drawing:

[0023] 100-cabinet, 101-detection cavity, 110-control panel, 111-air pressure gauge, 112-working indicator lamp, 113-power indicator lamp, 114-alarm buzzer indicator lamp, 115-power switch, 116-emergency stop button, 117-liquid crystal display screen, 120-castor wheel, 130-handle;

[0024] 200-pressure increasing device, 210-pressure increasing pump;

[0025] 300-detection device, 310-storage rack, 311-limit block, 312-structural rod, 313-stiffening rib, 314-arc tight hoop, 320-automatic sealing assembly, 321-inflation interface, 322-rack, 323-cylinder, 324-first connecting rod, 325-second connecting rod, 326-connecting pipe, 327-air pipe;

[0026] 400 - product under test. DETAILED DESCRIPTION

[0027] Embodiments of the present application are described below in detail, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary only, and are used only for the purpose of explaining the present application, and should not be understood as a limitation of the present application.

[0028] In the description of the present application, it should be understood that, in relation to the orientation description, for example, the orientation or position relationship indicated by up, down and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be understood as a limitation of the present application.

[0029] In the description of the present application, the plural means more than two. If there is a description of first, second, it is only for the purpose of distinguishing technical features, and should not be understood as indicating or implying relative importance or implying indicating the number of technical features indicated or implying indicating the sequence of technical features indicated.

[0030] In the description of the present application, unless otherwise explicitly limited, the words such as setting, installing, connecting and the like should be broadly understood, and the skilled in the art can reasonably determine the specific meaning of the above words in the present application in combination with the specific content of the technical solution.

[0031] Reference Figs. 1 to 3The utility model discloses a high pressure air tightness test platform, high pressure air tightness test platform includes cabinet 100, booster device 200 and detection device 300. Among them, cabinet 100 is provided with control panel 110, and cabinet 100 is provided with detection cavity 101. Booster device 200 is arranged in detection cavity 101, and booster device 200 is provided with at least one booster pump 210. Detection device 300 is arranged in detection cavity 101, and detection device 300 is provided with a rack 310, one end of the rack 310 is provided with a limit block 311, and an automatic sealing assembly 320 is arranged above the limit block 311. The automatic sealing assembly 320 is provided with an inflation interface 321 that can move and adjust towards the limit block 311, and the input end of the inflation interface 321 is provided with a three-phase valve. One end of the three-phase valve is communicated with the booster pump 210, and the other end of the three-phase valve is communicated with the air pressure gauge 111. Specifically, in the embodiment, during operation, the worker places the standard steel cylinder storing various gases as the product to be tested 400 on the rack 310 of the detection device 300. The limit block 311 at one end of the rack 310 is used to adjust the posture of the product to be tested 400, so that the gas inlet valve of the product to be tested 400 is accurately aligned with the inflation interface 321 on the automatic sealing assembly 320. The automatic sealing assembly 320 controls the inflation interface 321 to move and adjust towards the limit block 311 until it is stably connected with the gas inlet valve of the product to be tested 400. The booster pump 210 in the booster device 200 is started, and the booster pump 210 pumps high-pressure gas into the standard steel cylinder, i.e. the product to be tested 400, and continues to pump gas until the internal pressure of the product to be tested 400 reaches the specified pressure state. After the internal pressure of the product to be tested 400 reaches the specified value, the three-phase valve is operated. The three-phase valve switches the path originally communicated between the booster pump 210 and the inflation interface 321, so that the air pressure gauge 111 is communicated with the inside of the product to be tested 400. At this time, the air pressure gauge 111 collects the pressure change data inside the product to be tested 400, so as to detect whether the air tightness of the product to be tested 400 meets the requirements. During the whole detection process, from the posture adjustment of the product to be tested 400, the connection of the inflation interface 321 and the gas inlet valve of the product to be tested 400, to the boosting and pressure data collection, etc. All links are automatically completed by the corresponding device, reducing the manual intervention steps. The automatic operation process does not need a large amount of manual operation, and each link can be carried out quickly and orderly. Compared with the traditional manual operation mode, the detection time of a single product to be tested 400 is shortened, and the overall work efficiency is improved. The direct operation of the worker during the detection process is reduced, the errors and non-standard behaviors caused by manual operation are avoided, and the detection errors and safety hazards caused by manual factors are reduced.

[0032] In some embodiments of the utility model, automatic sealing assembly 320 includes frame 322, air cylinder 323, first connecting rod 324, second connecting rod 325, connecting pipe 326 and air pipe 327, frame 322 is connected with storage rack 310, air cylinder 323 is rotationally connected with frame 322, the output end of air cylinder 323 is rotationally connected with one end of first connecting rod 324, the other end of first connecting rod 324 is rotationally connected with frame 322, the central position of first connecting rod 324 is rotationally connected with one end of second connecting rod 325, the other end of second connecting rod 325 is rotationally connected with connecting pipe 326, connecting pipe 326 is slidingly connected with frame 322, one end of connecting pipe 326 is communicated with air pipe 327, the other end of connecting pipe 326 is communicated with inflation interface 321, air pipe 327 is communicated with three-phase valve, specifically, in the embodiment, the frame 322 of automatic sealing assembly 320 is connected with storage rack 310, and stable support is provided for the whole assembly. Air cylinder 323 is rotationally connected with frame 322, and when it is necessary to connect inflation interface 321 with the air inlet valve of the product to be tested 400, air cylinder 323 starts to work. The output end of air cylinder 323 is extended, and the one end of first connecting rod 324 rotationally connected with the output end is moved. Since the other end of first connecting rod 324 is rotationally connected with frame 322, first connecting rod 324 will make circular motion around the connecting point with frame 322. The central position of first connecting rod 324 is rotationally connected with one end of second connecting rod 325, and with the movement of first connecting rod 324, second connecting rod 325 is driven to move. The other end of second connecting rod 325 is rotationally connected with connecting pipe 326, so that connecting pipe 326 makes sliding motion along frame 322. One end of connecting pipe 326 is communicated with air pipe 327, and the other end is communicated with inflation interface 321. In the sliding process of connecting pipe 326, inflation interface 321 is driven to move towards the direction of limiting block 311 until it is stably connected with the air inlet valve of the product to be tested 400. Air pipe 327 is communicated with three-phase valve, and when inflation interface 321 is connected with the air inlet valve of the product to be tested 400, booster pump 210 delivers gas to inflation interface 321 through three-phase valve, air pipe 327 and connecting pipe 326, and then high-pressure gas is filled into the product to be tested 400. In the whole movement process, the connecting rods and the rotationally connected structures play the roles of buffering and force dispersion. For example, when inflation interface 321 encounters a large resistance during the connection process, the force output by air cylinder 323 will not be directly applied to inflation interface 321, but will be dispersed to frame 322 and other structures through the rotation and sliding of first connecting rod 324, second connecting rod 325 and other components, so as to avoid overloading and damage of air cylinder 323 due to instantaneous bearing of excessive resistance, and to ensure that air cylinder 323 can work stably and continuously to realize reliable connection of inflation interface 321 with the air inlet valve of the product to be tested 400. In the embodiment, through the cooperative movement of air cylinder 323, connecting rod and other components, inflation interface 321 can be automatically controlled to approach and connect the air inlet valve of the product to be tested 400, without manual manual docking, and the automation degree of the detection process is improved.The connecting rod structure design effectively prevents overloading of the cylinder 323. When encountering connecting resistance, the force can be dispersed and buffered, prolonging the service life of the cylinder 323, reducing equipment maintenance costs, and ensuring the continuity and stability of the entire detection work.

[0033] In some embodiments of the utility model, the first connecting rod 324 is in L-shaped structure. Specifically, in this embodiment, through this structure design, the output shaft of the cylinder 323 and the axis of the connecting pipe 326 are not collinear. During the connection of the inflation interface 321 to the air inlet valve of the product to be tested 400, if a larger resistance is encountered, such as a deviation in the valve position or an obstacle in the connection part. At this time, the force output by the cylinder 323 will not be directly applied to the inflation interface 321. The L-shaped first connecting rod 324 will use its unique shape to disperse part of the force to other components through its rotation, such as through the rotating connection with the rack 322 and the connection with the second connecting rod 325, to disperse the force to the entire assembly structure.

[0034] In some embodiments of the utility model, a sealing ring is arranged on the inflation interface 321. Specifically, in this embodiment, the sealing ring can fill the small gap between the inflation interface 321 and the air inlet valve of the product to be tested 400, forming a tight sealing environment. When high-pressure gas is filled into the product to be tested 400, it effectively prevents gas leakage from the connection part, ensuring that the internal pressure of the product to be tested 400 can accurately reach and remain at the specified value, thereby improving the accuracy of the air tightness detection result. If there is no sealing ring, gas may leak at the connection point, resulting in inaccurate detected pressure and inability to judge the true air tightness of the product to be tested 400.

[0035] In some embodiments of the utility model, the storage rack 310 includes a rack body, and a plurality of structure rods 312 are arranged on the rack body, and the plurality of structure rods 312 are arranged in a circular arc shape. Specifically, in this embodiment, the circular arc-shaped structure rod 312 can better fit the product to be tested 400. Standard steel cylinders are usually cylindrical, and the circular arc-shaped structure rod 312 can contact the steel cylinder surface at multiple points, providing stable support for the steel cylinder. Compared with ordinary flat support or irregular support structure, this fitting method can disperse the weight of the steel cylinder, reduce local pressure concentration, avoid damage to the steel cylinder due to excessive local stress, and also prevent the steel cylinder from rolling or shaking on the storage rack 310, ensuring the position stability of the steel cylinder during detection.

[0036] In some embodiments of the utility model, the article holder 310 is provided with a reinforcing rib 313 along the axis direction of the structural rod 312. Specifically, in this embodiment, the reinforcing rib 313 is arranged along the axis direction of the structural rod 312, which significantly improves the carrying capacity of the article holder 310. This means that the article holder 310 can safely place heavier products 400 to be tested, or under the same carrying weight, the safety margin of the structure is higher. For some cases that need to detect large-capacity and heavy steel cylinders, the reinforcing rib 313 plays a crucial role, which enables the article holder 310 to meet the detection needs of products of different specifications, and widens the application range of the test bench.

[0037] In some embodiments of the utility model, the article holder 310 is provided with an arc-shaped clamp 314, and the two ends of the arc-shaped clamp 314 are detachably connected with the structural rod 312. Specifically, in this embodiment, the design shape of the arc-shaped clamp 314 is matched with the cylindrical shape of the product 400 to be tested. When the arc-shaped clamp 314 is wrapped around the steel cylinder and the two ends are detachably connected with the structural rod 312, it can tightly hold the steel cylinder and limit the movement of the steel cylinder on the article holder 310. During the high-pressure airtightness test, even if the test bench may produce some slight vibration, the steel cylinder can be stably fixed on the article holder 310, and the detection result will not be affected by the shaking, or the automatic sealing assembly 320 and the air inlet valve connection will be loose, etc. problem, to ensure the smooth progress of the detection work.

[0038] In some embodiments of the utility model, all the booster pumps 210 are connected in parallel through pipelines. Specifically, in this embodiment, in the entire high-pressure airtightness test system, multiple booster pumps 210 are connected in parallel through pipelines. When the system starts the airtightness test, each booster pump 210 is started simultaneously or according to the actual needs. Each booster pump 210 independently boosts the incoming gas. Specifically, the gas first enters the inlet of each booster pump 210, the booster pump 210 does work on the gas, compresses the volume of the gas, and increases the pressure of the gas. The gas after being boosted flows out through the outlet pipeline of each booster pump 210, and then the high-pressure gas from different booster pumps 210 converges in the parallel pipeline, and is finally uniformly delivered to the subsequent three-phase valve, air pipe 327, etc., and then enters the inside of the product 400 to be tested through the inflation interface 321, to meet the high-pressure environment required by the airtightness test. In addition, if one of the booster pumps 210 fails, the other booster pumps 210 can still work, maintaining the basic gas supply capacity of the system. This ensures that when some equipment fails, the entire high-pressure airtightness test system will not completely malfunction, and the detection work can still continue, but the inflation speed may be reduced, which does not cause the detection task to be interrupted, and improves the fault tolerance and reliability of the system.

[0039] In some embodiments of the utility model, work indicating lamp 112, power indicating lamp 113, alarm buzzer indicating lamp 114, power switch 115, emergency stop button 116 and liquid crystal display 117 are arranged on control panel 110. Specifically, in the embodiment, various switches and indicating lamps are integrated on control panel 110, which facilitates data collection and process control. In the embodiment, the cabinet structure is assembled by multiple bending of aluminum-zinc coated steel plate, the thickness is not less than 1.5 mm, the thickness of the cabinet door steel plate is not less than 2.0 mm, the cabinet inner and outer shells are treated by plastic spraying, the protection level is IP41, and the cabinet meets dustproof and electromagnetic compatibility.

[0040] In some embodiments of the utility model, casters 120 are arranged at the four corners of the bottom of cabinet 100, and handles 130 are arranged on the two sides of cabinet 100. Through the design of the structure, the practicality and the convenience of moving of the workbench are improved.

[0041] The utility model is described in detail above in combination with the drawings, but the utility model is not limited to the above-mentioned embodiments, and various changes can be made within the knowledge range possessed by ordinary skilled persons in the technical field without departing from the purpose of the utility model.

Claims

1. A high pressure gas tightness test bench, characterized in that, The utility model relates to a kind of detection device and detection cavity, including: Cabinet (100), control panel (110) is provided on the cabinet (100), detection cavity (101) is provided in the cabinet (100); Pressure increasing device (200), the pressure increasing device (200) is arranged in the detection cavity (101), and the pressure increasing device (200) is provided with at least one pressure increasing pump (210); Detection device (300), the detection device (300) is arranged in the detection cavity (101), and the detection device (300) is provided with shelf (310), one end of the shelf (310) is provided with limit block (311), and automatic sealing assembly (320) is arranged above the limit block (311), the automatic sealing assembly (320) is provided with inflatable interface (321) that can be moved towards the limit block (311) adjustment, and the input end of the inflatable interface (321) is provided with three-phase valve, one end of the three-phase valve is communicated with the pressure increasing pump (210), and the other end of the three-phase valve is communicated with air pressure gauge (111).

2. The high pressure air tightness test bench according to claim 1, characterized in that, The automatic sealing assembly (320) includes rack (322), cylinder (323), first connecting rod (324), second connecting rod (325), connecting pipe (326) and air pipe (327);The rack (322) is connected with the shelf (310), and the cylinder (323) is rotatably connected with the rack (322);The output end of the cylinder (323) is rotatably connected with one end of the first connecting rod (324), the other end of the first connecting rod (324) is rotatably connected with the rack (322), and the central position of the first connecting rod (324) is rotatably connected with one end of the second connecting rod (325);The other end of the second connecting rod (325) is rotatably connected with the connecting pipe (326), the connecting pipe (326) is slidably connected with the rack (322), one end of the connecting pipe (326) is communicated with the air pipe (327), and the other end of the connecting pipe (326) is communicated with the inflatable interface (321);The air pipe (327) is communicated with the three-phase valve.

3. The high pressure air tightness test bench of claim 2, wherein, The first connecting rod (324) is L-shaped structure.

4. The high pressure air tightness test bench of claim 2, wherein, Sealing ring is provided on the inflatable interface (321).

5. The high pressure air tightness test stand of claim 1, wherein, The shelf (310) includes frame body, and the frame body is provided with a plurality of structure rods (312), and a plurality of structure rods (312) are distributed in arc shape.

6. The high pressure air tightness test bench of claim 5, wherein, The shelf (310) is provided with reinforcing ribs (313) along the axis direction of the structure rod (312).

7. The high pressure air tightness test bench of claim 6, wherein, The shelf (310) is provided with arc-shaped clamps (314), and both ends of the arc-shaped clamps (314) are detachably connected with the structure rod (312) respectively.

8. The high pressure air tightness test stand of claim 1, wherein, All the pressure increasing pumps (210) are connected in parallel by pipeline.

9. The high pressure air tightness test stand of claim 1, wherein, The control panel (110) is provided with working indicator light (112), power indicator light (113), alarm buzzer indicator light (114), power switch (115), emergency stop button (116) and liquid crystal display screen (117).

10. The high pressure air tightness test stand of claim 1, wherein, The cabinet (100) bottom four corners are respectively provided with casters (120), and two sides of the cabinet (100) are respectively provided with handles (130).

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