Airtightness detection device for aerospace parts

Abstract

The utility model provides an air tightness detection device for aerospace parts, and belongs to the technical field of spacecraft processing and manufacturing. The device is simple and ingenious in structure, high in workpiece detection adaptability and easy to operate, and the detection result is convenient to observe. Universal wheels are arranged at the bottom of an object carrying sliding plate of the device, a workpiece frame is placed on the object carrying sliding plate, the object carrying sliding plate is slidably inserted in a housing, a workpiece is in ventilation communication with external air supply equipment through a reducing flange joint and an air injection pipe, a liquid containing pipe is fixedly arranged on the housing, and marking liquid is filled in the liquid containing pipe. External air supply equipment operates to inflate air into the workpiece for air tightness detection, and the detection result is mastered by observing the liquid level change of the liquid containing pipe. The device is flexible in structure, convenient in workpiece mounting and dismounting, suitable for detection of workpieces of various structural sizes, simple and convenient in detection operation, convenient in observation of detection results, adjustable in height of the bearing plate, capable of stably supporting and bearing the workpieces, and capable of reducing the burden of a user for carrying the workpieces at the same time.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the aerospace processing and manufacturing technical field, especially relates to a spare part air tightness detection device for aerospace. BACKGROUND

[0002] When the processing and production of the aerospace parts are carried out, the air tightness of numerous workpieces is required to be high, and only when the workpieces have excellent air tightness can the safe and stable operation of the aerospace vehicle be ensured. At present, the air tightness detection of the workpieces is mainly carried out by using electronic technology, and the detection cost is high and the requirement for the user is high. When batch detection is carried out, the detection efficiency is limited, which affects the processing and production progress of the parts. Therefore, a spare part air tightness detection device capable of being flexibly applied is required to be applied to the processing and production process of the aerospace vehicle. UTILITY MODEL CONTENTS

[0003] In order to solve the problems in the background art, the utility model provides a spare part air tightness detection device for aerospace, which has simple and ingenious structure, high workpiece detection adaptability, simple operation and convenient observation of the detection result.

[0004] The technical scheme adopted by the utility model to solve the technical problem is as follows: a spare part air tightness detection device for aerospace, which comprises a cover shell, a load sliding plate, a liquid containing pipe and a variable diameter flange joint. The cover shell is provided with an open side vertical surface and no bottom plate. The load sliding plate is in L shape, and the workpiece is loaded on the load sliding plate and inserted and slid in the cover shell. The horizontal plate of the load sliding plate is filled and blocked at the bottom of the cover shell, and the vertical plate of the load sliding plate covers the open side vertical surface of the cover shell. A through hole is formed in the middle of the vertical plate of the load sliding plate, and a gas injection pipe is arranged on the outer wall of the vertical plate at the through hole. The gas injection pipe is connected with an external gas supply device in a sealed manner. The variable diameter flange joint is detachably fixed and installed on the inner wall of the vertical plate and covers the through hole by means of bolts. A gas permeable hole is formed in the side wall of the cover shell, and the liquid containing pipe is fixedly installed on the outer wall of the cover shell. The liquid containing pipe is in U shape, and the top of one end of the liquid containing pipe is bent into a horizontal shape and fixedly connected with the gas permeable hole. The other end of the liquid containing pipe is naturally open and vertically points to the upper side, and a label liquid is contained in the lower arc bending section of the liquid containing pipe.

[0005] The spare part air tightness detection device for aerospace further comprises a plurality of universal wheels, which are arranged on the outer bottom surface of the horizontal plate of the load sliding plate.

[0006] The load sliding plate comprises a supporting plate and a hydraulic rod. The load sliding plate is provided with a plurality of universal wheels, and the supporting plate is fixedly installed on the telescopic end of the hydraulic rod.

[0007] The side wall of the open edge of the cover is fixed with a plurality of buckles, and the vertical plate of the object carrying slide plate is provided with hooks matched with the buckles.

[0008] The edge and end surface of the cover matched with the object carrying slide plate are provided with sealing strips matched.

[0009] The liquid containing pipe is fixedly installed on the outer wall of the cover through a pipe clamp, and a liquid level mark line is arranged on the liquid containing pipe.

[0010] The device has the advantages that: the object carrying slide plate of the device can freely slide in and out of the cover, the structure is flexible, and the device is convenient for mounting and dismounting workpieces; the variable diameter flange joint of the structure can be flexibly replaced, and can adapt to detection of workpieces of various structural sizes; the device is provided with a liquid containing pipe, and uses the principle of communicating vessels to perform air tightness detection, instead of electronic technology, so that the detection operation is simple and convenient, and the detection result is convenient for observation; the support plate of the device for supporting workpieces can be flexibly adjusted in height, and is convenient for supporting workpieces, provides efficient support for the workpieces, and is convenient for aligning the workpieces and the variable diameter flange joint, and reduces the burden of the user for carrying the workpieces. BRIEF DESCRIPTION OF DRAWINGS

[0011] In the drawings:

[0012] Figure 1 is a schematic diagram of the overall structure of the device;

[0013] Figure 2 is a schematic diagram of the internal structure of the device;

[0014] Figure 3 is a schematic diagram of the lifting effect of the support plate of the device;

[0015] In the drawings: 1, cover; 2, object carrying slide plate; 3, liquid containing pipe; 4, variable diameter flange joint; 5, universal wheel; 6, buckle; 7, pipe clamp; 21, gas injection pipe; 22, support plate; 23, hydraulic rod; 24, embedded groove. DETAILED DESCRIPTION

[0016] The device will be further described in detail in combination with the drawings. The drawings are all simplified schematic diagrams, and only illustrate the basic structure of the device in a schematic manner, and therefore only show the structures related to the device.

[0017] An aeronautics and aerospace parts airtightness detection device, comprising a cover 1, a load slide plate 2, a liquid container 3 and a variable diameter flange joint 4, the cover 1 is provided with an open side vertical surface without a bottom plate, the load slide plate 2 is L-shaped, the load slide plate 2 carries a workpiece and is slidingly inserted into the cover 1, the horizontal plate of the load slide plate 2 is filled and blocked at the bottom of the cover 1, the vertical plate of the load slide plate 2 covers the open side vertical surface of the cover 1, a through hole is formed in the middle of the vertical plate of the load slide plate 2, a gas injection pipe 21 is provided on the outer wall of the vertical plate at the through hole, the gas injection end of the gas injection pipe 21 is sealingly connected with an external gas supply device, the variable diameter flange joint 4 is detachably fixedly installed on the inner wall of the vertical plate and covers the through hole by bolts, a through air hole is formed in the side wall of the cover 1, the liquid container 3 is fixedly installed on the outer wall of the cover 1, the liquid container 3 is U-shaped, one end of the liquid container 3 is bent into a horizontal shape at the top and is fixedly communicated with the air hole, the other end of the liquid container 3 is naturally open and vertically points to the upper side, and a mark liquid is contained in the lower side circular arc bending section of the liquid container 3.

[0018] The workpiece is fixedly and sealingly connected with the variable diameter flange joint 4, the load slide plate 2 is slidingly inserted into the cover 1, the external gas supply device injects gas into the workpiece to be detected through the gas injection pipe 21 and the variable diameter flange joint 4, if the airtightness is up to the standard, the liquid level of the mark liquid in the liquid container 3 will not change, and if the airtightness is not up to the standard, the liquid level of the mark liquid in the liquid container 3 will change.

[0019] The aeronautics and aerospace parts airtightness detection device further comprises a plurality of universal wheels 5, the plurality of universal wheels 5 are arranged on the outer bottom surface of the horizontal plate of the load slide plate 2, and the plurality of universal wheels 5 support the load slide plate 2 to move flexibly.

[0020] The load slide plate 2 comprises a supporting plate 22 and a hydraulic rod 23, the load slide plate 2 is provided with an embedded groove 24 which protrudes downward and avoids the plurality of universal wheels 5 on the horizontal plate of the load slide plate 2, the hydraulic rod 23 is fixedly arranged in the embedded groove 24 at the lower base end, the supporting plate 22 is fixedly installed at the telescopic end of the hydraulic rod 23 which vertically points upward, the workpiece is placed on the supporting plate 22, the hydraulic rod 23 is elongated to push the supporting plate 22 to lift up, thereby lifting the workpiece to move upward to align the workpiece with the variable diameter flange joint 4, and facilitating the connection of the workpiece with the variable diameter flange joint 4.

[0021] A plurality of buckles 6 are fixedly arranged on the side wall of the open edge of the cover 1, hooks are arranged on the vertical plate of the load slide plate 2 in a matched manner, the buckles 6 are hung with the hooks in a matched manner, and the buckles 6 and the hooks are matched with each other to stably connect the load slide plate 2 to the cover 1.

[0022] Sealing strips are arranged on the edges and end surfaces of the cover 1 and the load slide plate 2 in a matched manner, the load slide plate 2 is inserted into the cover 1 to form a sealed cavity, and the workpiece is detected in the sealed cavity.

[0023] The liquid containing pipe 3 is fixedly installed on the outer wall of the cover 1 through pipe clamps 7, and a liquid level mark line is arranged on the liquid containing pipe 3, which is used to assist in indicating the filling of liquid.

[0024] The variable-diameter flange joint 4 has a fixed structure size at one end, which is used to match the hole diameter of the gas injection pipe 21, and the structure size at the other end is matched and set according to the interface form of the workpiece to be detected. The variable-diameter flange joint 4 is clamped with the workpiece and the vertical plate of the object carrying slide plate 2 at both ends, respectively, so as to ensure the air tightness of the detection process.

[0025] Working principle: Place the workpiece frame on the supporting plate 22, connect and install the variable-diameter flange joint 4 on the object carrying slide plate 2, adjust the hydraulic rod 23 to elongate appropriately, fix and connect the interface of the workpiece with the variable-diameter flange joint 4 after alignment, push the object carrying slide plate 2 into the cover 1 after the workpiece connection is completed, lock the cover 1 and the object carrying slide plate 2 by using the plurality of buckles 6, and tightly connect the external gas supply equipment to the gas injection pipe 21, thus completing the preparation work for detection.

[0026] When detecting, start the external gas supply equipment to fill gas into the workpiece through the gas injection pipe 21 and the variable-diameter flange joint 4. If the workpiece air tightness meets the standard, the indicating liquid in the liquid containing pipe 3 will not change in liquid level. If the workpiece air tightness does not meet the standard, the indicating liquid in the liquid containing pipe 3 will have a height difference, that is, the liquid level in the pipe body connected to one end of the cover 1 will decrease, and the liquid level in the pipe body connected to the other end connected to the outside will increase. The workpiece air tightness can be known by observing the change of the liquid level.

[0027] After the detection is completed, the preparation work is performed in reverse, that is, after the external gas supply equipment is turned off, the plurality of buckles 6 are opened, the object carrying slide plate 2 is pulled out, and then the workpiece is removed.

[0028] The workpiece detection is repeated, that is, the above process is repeated, and different variable-diameter flange joints 4 are selected for different workpieces to be detected.

[0029] The above only describes preferred embodiments of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A device for testing the airtightness of aerospace components, characterized in that: The utility model provides a kind of airtight detection device for aerospace aviation parts, including cover (1), load slide plate (2), liquid container (3) and reducing flange joint (4), the cover (1) is without bottom plate and one side vertical surface is open, the load slide plate (2) is L-shaped, load slide plate (2) is loaded workpiece and is slidably inserted in cover (1), the transverse plate of load slide plate (2) is filled and blocked at the bottom of cover (1), the vertical plate of load slide plate (2) covers at the open side vertical surface of cover (1), the middle part of vertical plate of locking load slide plate (2) is provided with through hole, injection pipe (21) is projected and set on the through hole of outer wall, injection pipe (21) inlet end is sealedly connected with external gas supply equipment, the reducing flange joint (4) is detachably fixed and installed on the inner wall of vertical plate and covers through hole, the side wall of cover (1) is provided with through air hole, the outer wall of cover (1) is fixedly installed liquid container (3), the liquid container (3) is U-shaped, one end top of liquid container (3) is bent into horizontal and is fixedly communicated with air hole, the other end of liquid container (3) is naturally open and vertically points to upper, and the lower arc bending section of liquid container (3) is filled with indicating liquid.

2. The device for detecting air tightness of a part for aerospace according to claim 1, characterized in that: The airtight detection device for aerospace aviation parts further includes a plurality of universal wheels (5) on the outer bottom surface of the transverse plate of the load slide plate (2).

3. The device for detecting air tightness of a part for aerospace according to claim 2, characterized in that: The load slide plate (2) includes a supporting plate (22) and a hydraulic rod (23). The load slide plate (2) has a plurality of embedding grooves (24) on the transverse plate, which protrude downward to avoid the universal wheels (5). The hydraulic rod (23) is fixedly arranged in the embedding groove (24) at the lower base end. The supporting plate (22) is horizontally fixedly installed at the telescopic end of the hydraulic rod (23).

4. The device for detecting air tightness of a part for aerospace according to claim 3, characterized in that: A plurality of buckles (6) are fixedly arranged on the side wall of the open edge of the cover (1). Hooks are arranged on the vertical plate of the load slide plate (2). The buckles (6) are hung with the hooks.

5. The device for detecting air tightness of a part for aerospace according to claim 1 or 4, characterized in that: Sealing strips are arranged on the edges and end faces of the cover (1) and the load slide plate (2). When the load slide plate (2) is inserted into the cover (1), a sealed cavity is formed.

6. The device for detecting air tightness of a part for aerospace according to claim 5, characterized in that: The liquid container (3) is fixedly installed on the outer wall of the cover (1) by a pipe clamp (7). The liquid container (3) is provided with a liquid level mark line.

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