Rapid leak detection device for isostatic pressing graphite rubber sleeve

Abstract

The utility model relates to the technical field of graphite rubber sleeve leak detection, and provides an isostatic pressing graphite rubber sleeve rapid leak detection device which comprises a base, an inflation head and a detection arm, a support is fixed at the top of the base, the inflation head is arranged on the inner top wall of the support, a rubber sleeve to be detected is sleeved at the bottom of the inflation head, and an inflation assembly is arranged at the top of the inflation head. A stand column is arranged on one side of the inflation head, a shifting assembly is arranged in the stand column, a detection arm is arranged at one end of the inflation head, a leakage detection assembly is arranged on the side wall, facing the inflation head, of the detection arm, and a turning assembly is arranged on the periphery of the top of the base. Different from a traditional water immersion leak detection method that a die sleeve needs to be disassembled and single detection consumes more than 2 hours, the device adopts automatic feeding, detection and discharging processes, and is matched with the servo motor and the driving motor to drive the leak detection assembly to quickly move, omnibearing detection can be completed without disassembling a rubber sleeve, the detection time is greatly shortened, and the detection efficiency is improved. The detection efficiency is obviously improved, and the high-efficiency requirement of batch production is met.

Description

Technical Field

[0001] This utility model relates to the field of graphite rubber sleeve leak detection technology, and in particular to a rapid leak detection device for isostatic graphite rubber sleeves. Background Technology

[0002] In the field of isostatic pressing graphite green body forming, the rubber sleeve, as a key component, is usually made of rubber or elastic materials and plays a crucial role in encapsulating graphite powder and assisting in its forming under high pressure. The integrity of the rubber sleeve plays a decisive role in product quality. Once microcracks, pinholes, or damage occur, high-pressure liquid will seep in, leading to serious consequences such as green body contamination or forming failure, directly affecting production efficiency and product qualification rate.

[0003] Currently, after isostatic pressing of graphite preforms, leak detection of used rubber sleeves mainly relies on water immersion or manual inspection. Water immersion is cumbersome, requiring the sleeve to be disassembled and placed in water for testing, a time-consuming and inefficient process. Manual inspection depends on workers using handheld flashlights and tactile sensing, which is slow, labor-intensive, and demands a high level of experience and concentration from the inspectors. These limitations in inspection methods result in a persistently high rate of missed leaks, making it difficult to meet the ever-increasing production demands and quality control standards. Utility Model Content

[0004] The purpose of this invention is to provide a rapid leak detection device for isostatic graphite rubber sleeves, which solves the above-mentioned problems.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a rapid leak detection device for isostatic graphite rubber sleeves, comprising a base, an inflation head, and a detection arm. A bracket is fixed to the top of the base, an inflation head is provided on the inner top wall of the bracket, a rubber sleeve to be tested is fitted on the bottom of the inflation head, an inflation component is provided on the top of the inflation head, a column is provided on one side of the inflation head, an adjustment component is provided inside the column, a detection arm is provided at one end of the inflation head, a leak detection component is provided on the side wall of the detection arm facing the inflation head, and a rotation component is provided on the outer periphery of the top of the base.

[0006] Preferably, the inflation assembly includes an air tube installed at the middle of the top of the inflation head, a pressure sensor is provided on one side of the air tube, a pointer-type pressure gauge is provided on the other side of the air tube, and fixing clips are fixed at equal intervals on the side wall of the inflation head.

[0007] Preferably, the adjustment component includes a screw rotatably disposed inside the column, a threaded sleeve connected to the outside of the screw, a servo motor mounted on the top of the column, and a shaft at the bottom of the servo motor extending into the column and connected to the top of the screw.

[0008] Preferably, the detection arm is L-shaped, and the screw sleeve is fixedly connected to one end of the detection arm.

[0009] Preferably, the leak detection component includes a CCD camera disposed on the side wall of the detection arm, the CCD camera facing the inflation head, a spraying device disposed on the outer periphery of the CCD camera, and microphone components disposed on both sides of the spraying device.

[0010] Preferably, the turning assembly includes a rotating groove formed on the outer periphery of the top of the base, a turntable rotatably arranged inside the rotating groove, a toothed ring fixed on the outer wall of the turntable, a gear meshing on one side of the toothed ring, and a drive motor arranged on the top of the gear.

[0011] Preferably, the drive motor is mounted on the top of the base, the shaft at the bottom of the drive motor is fixedly connected to the shaft at the top of the gear, and the column is located on the top of the turntable and fixed to the top of the turntable.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] 1. The present invention provides a rapid leak detection device for isostatic graphite sleeves, which differs from the traditional water immersion leak detection method, which requires disassembly of the sleeve and takes more than 2 hours for a single test. This device adopts an automatic feeding, testing and unloading process, and is equipped with a servo motor and a drive motor to drive the leak detection components to move quickly. It can complete all-round testing without disassembling the sleeve, which greatly shortens the testing time, significantly improves the testing efficiency, and meets the high-efficiency requirements of mass production.

[0014] 2. This utility model provides an isostatic pressure graphite sleeve rapid leak detection device, which addresses the problem that the air pressure holding method cannot accurately locate the leak point with an error greater than 50mm. This device accurately identifies the leakage characteristic frequency in the 3-8kHz frequency band through an acoustic detection module, and combines the CCD camera in the optical auxiliary detection module with a UV lamp and fluorescent penetrant to accurately locate the leak point, effectively solving the problem of inaccurate positioning in traditional methods and providing an accurate basis for subsequent repairs.

[0015] 3. The present invention provides a rapid leak detection device for isostatic graphite rubber sleeves. Traditional visual inspection has a high failure rate of up to 35% for micron-level cracks. However, this device uses a high-sensitivity microphone array to capture the sound waves of the leaking airflow in a specific frequency band, performs FFT analysis with a signal processor, and captures fluorescence development with a CCD camera. This allows for the accurate detection of minute damage points on the rubber sleeve, greatly reducing the failure rate and ensuring the quality of the rubber sleeve.

[0016] 4. The isostatic graphite rubber sleeve rapid leak detection device provided by this utility model abandons the traditional method that relies on the experience and skill level of the operator. This device has a high degree of automation. The operator only needs to complete the simple operation of putting the rubber sleeve into the inflation head. Subsequent detection, positioning, sorting and other processes are all completed automatically by the equipment, which effectively reduces the error caused by human operation and ensures the accuracy and consistency of the test results. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention. Figure 1 ;

[0018] Figure 2 This is a schematic diagram of the overall structure of the present invention. Figure 2 ;

[0019] Figure 3 This is a partial structural cross-sectional view of the present invention;

[0020] Figure 4 For the present utility model Figure 3 Enlarged structural diagram at point A in the middle;

[0021] Figure 5 This is a front structural sectional view of the present invention;

[0022] Figure 6 This is a schematic diagram of the detection arm structure of this utility model.

[0023] The following are the labeling symbols in the diagram: 1. Base; 2. Bracket; 3. Inflation head; 31. Fixing clamp; 32. Air tube; 33. Pressure sensor; 34. Pointer pressure gauge; 4. Test sleeve; 5. Column; 51. Screw; 52. Screw sleeve; 53. Servo motor; 6. Detection arm; 61. CCD camera; 62. Spraying device; 63. Microphone assembly; 7. Rotary groove; 71. Turntable; 72. Gear ring; 73. Gear; 74. Drive motor. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] To further understand the content of this utility model, a detailed description of this utility model will be provided in conjunction with the accompanying drawings.

[0026] Combination Figures 1 to 6As shown, this utility model discloses a rapid leak detection device for isostatic graphite rubber sleeves, comprising a base 1, an inflation head 3, and a detection arm 6. A bracket 2 is fixed to the top of the base 1, and an inflation head 3 is provided on the inner top wall of the bracket 2. A rubber sleeve 4 to be tested is fitted onto the bottom of the inflation head 3. An inflation component is provided on the top of the inflation head 3. A column 5 is provided on one side of the inflation head 3, and an adjustment component is provided inside the column 5. A detection arm 6 is provided at one end of the inflation head 3, and a leak detection component is provided on the side wall of the detection arm 6 facing the inflation head 3. A rotation component is provided on the outer periphery of the top of the base 1.

[0027] The inflation assembly includes an air tube 32 installed at the top center of the inflation head 3. A pressure sensor 33 is provided on one side of the air tube 32, and a pointer-type pressure gauge 34 is provided on the other side of the air tube 32. Fixing clips 31 are fixed at equal intervals on the side wall of the inflation head 3.

[0028] The adjustment assembly includes a screw 51 rotatably disposed inside the column 5, a screw sleeve 52 threadedly connected to the outside of the screw 51, a servo motor 53 mounted on the top of the column 5, and a shaft at the bottom of the servo motor 53 extending into the column 5 and connected to the top of the screw 51.

[0029] The detection arm 6 is designed in an L-shape, and the screw sleeve 52 is fixedly connected to one end of the detection arm 6.

[0030] The leak detection assembly includes a CCD camera 61 disposed on the side wall of the detection arm 6, the CCD camera 61 facing the inflation head 3, a spraying device 62 disposed on the outer periphery of the CCD camera 61, and microphone assemblies 63 disposed on both sides of the spraying device 62.

[0031] The reversing assembly includes a rotating groove 7 formed on the outer periphery of the top of the base 1. A turntable 71 is rotatably arranged inside the rotating groove 7. A gear ring 72 is fixed on the outer wall of the turntable 71. A gear 73 is meshed on one side of the gear ring 72. A drive motor 74 is arranged on the top of the gear 73.

[0032] The drive motor 74 is mounted on the top of the base 1. The shaft at the bottom of the drive motor 74 is fixedly connected to the shaft at the top of the gear 73. The column 5 is located on the top of the turntable 71 and is fixed to the top of the turntable 71.

[0033] Specifically,

[0034] The spraying device 62 is a high-sensitivity microphone array, and the microphone assembly 63 is an automatic UV fluorescent penetrant spraying device.

[0035] The inflation sealing module consists of an inflation head 3 and a pressure sensor 33. The inflation head 3 is equipped with a silicone sealing ring and is compatible with different sizes of rubber sleeves. The pressure sensor 33 can detect pressure changes in the range of 0.1-0.5MPa.

[0036] The acoustic detection module consists of a microphone assembly 63 and a signal processor. The microphone assembly 63 can capture specific frequency sound waves generated by the leaking airflow; the signal processor performs FFT analysis to identify the characteristic frequency of the leak.

[0037] The optical auxiliary inspection module consists of a CCD camera 61 and a spraying device 62. The CCD camera 61 can work with a UV lamp to capture fluorescence development; the spraying device 62 can mark leaks.

[0038] Automatic feeding, inspection, and unloading of rubber sleeves are achieved using a rotating indexing plate or conveyor belt.

[0039] Working principle:

[0040] First, the rubber sleeve 4 to be tested is placed under the bottom of the air inflator 3, and its top outer edge is engaged with the fixing clip 31. The fixing clip 31 is used to press and secure the outer edge of the rubber sleeve, thus completing the fixing process of the rubber sleeve. Then, compressed air at 0.3 MPa is injected into the rubber sleeve 4 to be tested through the air tube 32.

[0041] In the detection position adjustment stage, the servo motor 53 is activated to drive the screw 51 to rotate, causing the screw sleeve 52 to move up and down outside the screw 51. Since the screw sleeve 52 is fixedly connected to the detection arm 6, it will synchronously drive the detection arm 6 to move up and down, thereby adjusting the position of the leak detection component on the side wall of the detection arm 6, allowing it to move up and down on one side of the rubber sleeve 4 to be tested, flexibly changing the vertical position of the detection. At the same time, the drive motor 74 is activated to drive the gear 73 to rotate, and the gear ring 72 meshing with the gear 73 will rotate accordingly, thereby driving the turntable 71 to rotate in the rotating groove 7, which in turn drives the column 5 to rotate. The rotation of the column 5 will drive the detection arm 6 to rotate around the inflation head 3, allowing the leak detection component to move around the outer periphery of the rubber sleeve 4 to be tested. Through the coordinated cooperation of the adjustment component and the rotation component, the leak detection component can comprehensively detect all positions on the outer side of the rubber sleeve 4 to be tested.

[0042] During the testing process, the microphone assembly 63 collects sound wave signals in real time and analyzes whether leakage characteristic peaks appear in the 3-8kHz frequency band. Once a leak is detected, the system automatically triggers the spraying device 62 to precisely spray fluorescent penetrant onto the leak point, and then the CCD camera 61 accurately locates the leak point. After the test is completed, qualified products automatically enter the next process, while unqualified products are automatically sorted by the system and subsequently handed over to manual repair for leak repair before being reused. Through the above process, the leak detection of the rubber sleeve can be completed efficiently and accurately.

[0043] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0044] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A rapid leak detection device for isostatic graphite rubber sleeves, comprising a base (1), an inflation head (3), and a detection arm (6), characterized in that: The base (1) has a bracket (2) fixed on its top. An inflation head (3) is provided on the inner top wall of the bracket (2). A test sleeve (4) is fitted on the bottom of the inflation head (3). An inflation component is provided on the top of the inflation head (3). A column (5) is provided on one side of the inflation head (3). An adjustment component is provided inside the column (5). A detection arm (6) is provided at one end of the inflation head (3). A leak detection component is provided on the side wall of the detection arm (6) facing the inflation head (3). A turning component is provided on the outer periphery of the top of the base (1).

2. The isostatic graphite rubber sleeve rapid leak detection device according to claim 1, characterized in that: The inflation assembly includes an air tube (32) installed at the middle of the top of the inflation head (3). A pressure sensor (33) is provided on one side of the air tube (32), and a pointer pressure gauge (34) is provided on the other side of the air tube (32). Fixing clips (31) are fixed at equal intervals on the side wall of the inflation head (3).

3. The isostatic graphite rubber sleeve rapid leak detection device according to claim 1, characterized in that: The adjustment assembly includes a screw (51) rotatably disposed inside the column (5), the screw (51) being threadedly connected to a threaded sleeve (52), a servo motor (53) being mounted on the top of the column (5), and the shaft at the bottom of the servo motor (53) extending into the column (5) and connected to the top of the screw (51).

4. The isostatic graphite rubber sleeve rapid leak detection device according to claim 3, characterized in that: The detection arm (6) is L-shaped, and the screw sleeve (52) is fixedly connected to one end of the detection arm (6).

5. The isostatic graphite rubber sleeve rapid leak detection device according to claim 1, characterized in that: The leak detection assembly includes a CCD camera (61) disposed on the side wall of the detection arm (6), the CCD camera (61) facing the inflation head (3), a spraying device (62) disposed on the outer periphery of the CCD camera (61), and microphone assemblies (63) disposed on both sides of the spraying device (62).

6. The isostatic graphite rubber sleeve rapid leak detection device according to claim 3, characterized in that: The turning assembly includes a rotating groove (7) opened on the outer periphery of the top of the base (1). A turntable (71) is rotatably arranged inside the rotating groove (7). A toothed ring (72) is fixed on the outer side wall of the turntable (71). A gear (73) meshes on one side of the toothed ring (72). A drive motor (74) is arranged on the top of the gear (73).

7. The isostatic graphite rubber sleeve rapid leak detection device according to claim 6, characterized in that: The drive motor (74) is mounted on the top of the base (1). The shaft at the bottom of the drive motor (74) is fixedly connected to the shaft at the top of the gear (73). The column (5) is located on the top of the turntable (71) and is fixed to the top of the turntable (71).

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