A special inspection tool for measuring the airtight leakage of products

Abstract

The present invention relates to a special inspection tool for measuring the airtight leakage of products, including an airtight cavity, a cavity sealing upper cover, a taper ejector pin and a pipeline joint. Among them, a detection avoidance hole is machined at the part installation position on one side surface of the airtight cavity, and the cavity sealing upper cover is detachably and sealingly installed on the opposite side surface. When the part to be measured is installed on the airtight cavity, the taper through hole to be measured of the part to be measured is directly opposite to the detection avoidance hole. The bottom of the taper ejector pin abuts against the cavity sealing upper cover, the top passes through the detection avoidance hole and extends into and tightly abuts against the taper through hole to be measured. A pipeline joint connected to an external charging pipeline is also provided on the airtight cavity, and a pressure gauge is also provided on the pipeline joint or the airtight cavity. The present invention solves the problems in the prior art that the manual detection of the leakage amount of products is inaccurate, the operation is inconvenient, the error is relatively large, and the measurement efficiency is low.

Description

Technical Field

[0001] The present invention belongs to the technical field of airtight inspection tools, and relates to a special inspection tool for measuring the airtight leakage of products. Background Art

[0002] At present, many precision parts have airtight leakage problems, resulting in inaccurate detection of leakage during the production process. With the continuous improvement of product precision and product safety and quality awareness, the detection of products with relatively low precision can be achieved using existing standard measuring tools, while the leakage of products cannot be detected. Then, by observing the leakage situation, it can be judged whether the sealing performance of the product is qualified according to the detection of the special airtight leakage inspection tool.

[0003] Airtightness detection is an important process for product quality and production safety. Its role in the production process has been widely recognized, and its application fields are also becoming wider and wider, expanding from the previous automotive manufacturing industry to the current general daily necessities industry, household appliances, food packaging, medical devices, etc. Improvement of airtightness detection efficiency: In order to improve the detection accuracy and efficiency and achieve automatic detection.

[0004] For the measured part as Figure 2 shown, it has a vertically penetrating tapered through-hole. Such a tapered through-hole is likely to have a rough surface such as patterns on the inner wall due to reasons such as machining accuracy, resulting in poor subsequent sealing performance. Therefore, it is necessary to implement detection on it. Currently, there is a lack of an inspection tool for detecting the airtightness of the tapered through-hole of such a measured part. Summary of the Invention

[0005] The purpose of the present invention is to provide a special inspection tool for measuring the airtight leakage of products, so as to efficiently and quickly detect the airtightness of the tapered through-hole on the product part.

[0006] The purpose of the present invention can be achieved through the following technical solutions:

[0007] A special inspection tool for measuring the airtight leakage of products includes an airtight cavity, a cavity sealing upper cover, a tapered thimble, and a pipeline joint. Among them, a detection avoidance hole is processed at the part installation position on one side surface of the airtight cavity, and the cavity sealing upper cover is detachably and sealedly installed on the opposite side surface. When the measured part is installed on the airtight cavity, the to-be-measured tapered through-hole of the measured part is directly opposite to the detection avoidance hole. The bottom of the tapered thimble abuts against the cavity sealing upper cover, the top passes through the detection avoidance hole, and extends into and tightly abuts against the to-be-measured tapered through-hole. The airtight cavity is also provided with a pipeline joint connected to an external charging pipeline, and a pressure gauge is also provided on the pipeline joint or the airtight cavity.

[0008] Furthermore, a regulating valve for regulating the air pressure flow is also provided on the pipeline joint.

[0009] Furthermore, a compression elastic member is further provided between the cavity sealing upper cover and the taper thimble, and the telescopic direction of the compression elastic member is the same as the direction in which the taper thimble extends into the taper through hole to be measured.

[0010] Furthermore, the compression elastic member is a standard spring.

[0011] Furthermore, the cavity sealing upper cover and the airtight cavity are locked and fixed by a second screw.

[0012] Furthermore, an upper cover sealing ring is further provided at the contact part between the cavity sealing upper cover and the airtight cavity.

[0013] Furthermore, the part to be measured is locked and fixed at the part installation position of the airtight cavity by a first screw.

[0014] Furthermore, a part sealing ring is further provided at the contact part between the part to be measured and the airtight cavity.

[0015] Furthermore, the pipeline joint is an adjustable airtight joint.

[0016] Furthermore, a thimble sealing ring is further provided between the taper thimble and the airtight cavity.

[0017] Compared with the prior art, the present invention has the following advantages:

[0018] (1) The scope of use is greatly improved, the versatility is relatively strong, and the detection scope of use is expanded.

[0019] (2) It is convenient to operate, easy to understand, easy to carry, and has high precision.

[0020] (3) The structure is simple, the manufacturing cost is low, so the production of tooling is greatly reduced and the general ability is enhanced. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is an exploded schematic view of the inspection tool of the present invention;

[0022] Figure 2 is a detection schematic view of the part to be measured;

[0023] Figure 3 is an external schematic view of the inspection tool;

[0024] Description of the reference numerals in the drawings:

[0025] 1 - pressure gauge, 2 - second screw, 3 - cavity sealing upper cover, 4 - upper cover sealing ring, 5 - standard spring, 6 - taper thimble, 7 - thimble sealing ring, 8 - airtight cavity, 9 - part sealing ring, 10 - part to be measured, 11 - pipeline joint, 12 - first screw. Detailed implementation mode

[0026] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. This embodiment is implemented on the premise of the technical solution of the present invention, and gives detailed implementation manners and specific operation processes, but the protection scope of the present invention is not limited to the following embodiments.

[0027] In the following embodiments or examples, if there is no special description of functional components or structures, it means that they are all conventional components or structures adopted in the art to achieve corresponding functions.

[0028] Please refer to Figure 1 and Figure 3 As shown, a special fixture for measuring the airtight leakage of products includes an airtight cavity 8, a cavity sealing upper cover 3, a taper ejector pin 6, and a pipeline joint 11 (i.e., an adjustable airtight joint). Among them, a detection avoidance hole is machined at the part installation position on one side surface of the airtight cavity 8, and the cavity sealing upper cover 3 is detachably and sealingly installed on the opposite side surface. When the part to be measured 10 is installed on the airtight cavity 8, the taper through hole to be measured of the part to be measured 10 is directly opposite to the detection avoidance hole. The bottom of the taper ejector pin 6 abuts against the part to be measured 10, and the top passes through the detection avoidance hole 8 and extends into and abuts tightly against the taper through hole to be measured. A pipeline joint 11 connected to an external charging pipeline is also provided on the airtight cavity 8, and a pressure gauge 1 is also provided on the airtight cavity 8.

[0029] In a specific implementation manner of the present invention, please refer to Figure 1 As shown, a regulating valve 11 for regulating air pressure flow is also provided on the pipeline joint.

[0030] In a specific implementation manner of the present invention, please refer to Figure 1 As shown, a standard spring 5 is also provided between the cavity sealing upper cover 3 and the taper ejector pin 6, and the telescopic direction of the standard spring 5 is the same as the direction in which the taper ejector pin 6 extends into the taper through hole to be measured. In a more specific implementation manner, the standard spring 5 is a compression spring.

[0031] In a specific implementation manner of the present invention, please refer to Figure 1 As shown, the cavity sealing upper cover 3 and the airtight cavity 8 are locked and fixed by a first screw 2 (i.e., an M6 standard internal hexagonal screw). In a more specific implementation manner, an upper cover sealing ring 4 is also provided at the contact part between the cavity sealing upper cover 3 and the airtight cavity 8.

[0032] In a specific implementation manner of the present invention, please refer to Figure 1As shown, the part 10 to be measured is locked and fixed at the part installation position of the airtight cavity 8 by the first screw 12 (M5 standard hexagon socket head screw). In a more specific implementation, a part sealing ring 9 is also provided at the contact part between the part 10 to be measured and the airtight cavity 8.

[0033] In a specific implementation of the present invention, the pipeline joint 11 is an adjustable airtight joint.

[0034] In a specific implementation of the present invention, a thimble sealing ring 7 is also provided on the taper thimble 6.

[0035] The above embodiments can be implemented individually, or in any combination of two or more.

[0036] The above embodiments will be described in more detail below with reference to specific examples.

[0037] Example 1:

[0038] Please refer to Figure 1 As shown, a special fixture for measuring the airtight leakage of a product includes an airtight cavity 8, a cavity sealing upper cover 3, a taper thimble 6 and a pipeline joint 11. Among them, a detection avoidance hole is machined at the part installation position on one side surface of the airtight cavity 8, and a cavity sealing upper cover 3 is detachably and sealingly installed on the opposite side surface. When the part 10 to be measured is installed on the airtight cavity 8, the to-be-measured taper through hole of the part 10 to be measured is aligned with the detection avoidance hole, the bottom of the taper thimble 6 abuts against the cavity sealing upper cover 3, and the top passes through the detection avoidance hole and extends into and abuts against the to-be-measured taper through hole. A pipeline joint 11 connected to an external charging pipeline is also provided on the airtight cavity 8, and a pressure gauge 1 is also provided on the pipeline joint 11 or the airtight cavity 8.

[0039] Please refer to Figure 1 As shown, a regulating valve 11 for regulating the air pressure flow is also provided on the pipeline joint.

[0040] Please refer to Figure 1 As shown, a standard spring 5 is also provided between the cavity sealing upper cover 3 and the taper thimble 6, and the telescopic direction of the standard spring 5 is the same as the direction in which the taper thimble 6 extends into the to-be-measured taper through hole.

[0041] Please refer to Figure 1 As shown, the cavity sealing upper cover 3 and the airtight cavity 8 are locked and fixed by the second screw 2 (i.e., M6 standard hexagon socket head screw). In a more specific implementation, an upper cover sealing ring 4 is also provided at the contact part between the cavity sealing upper cover 3 and the airtight cavity 8.

[0042] Please refer to Figure 1As shown, the part 10 to be measured is locked and fixed at the part installation position of the airtight cavity 8 by the first screw 12 (i.e., M5 hexagon socket head standard screw). In a more specific implementation, a part sealing ring 9 is also provided at the contact part between the part 10 to be measured and the airtight cavity 8. The pipeline joint 11 is an adjustable airtight joint. A thimble sealing ring 7 is also provided between the taper thimble 6 and the airtight cavity 8.

[0043] The working principle of the inspection tool in this embodiment is as follows:

[0044] First, install the taper thimble 6 with a sealing ring in the airtight cavity 8, so that the top of the taper thimble 6 passes through the detection avoidance hole and extends into the taper through hole of the part 10 to be measured. Then, install the compression elastic part (i.e., the standard spring 5) on the cavity sealing upper cover 3, and use the second screw 2 to lock and fix it with the airtight cavity 8, so that the standard spring 5 abuts against the taper thimble 6, and further makes the taper thimble 6 and the taper through hole to be measured of the part 10 to be measured abut tightly, as Figure 2 shown; Subsequently, install the regulating valve and the pressure gauge 1 on the airtight cavity 8, connect the pipeline joint 11 with the external charging pipeline, and at the same time, lock the part 10 to be measured with the first screw 12; Immediately afterwards, when the airtight leakage inspection tool is ventilated, adjust the air pressure flow through the regulating valve 11; Finally, the airtight leakage of the parts is judged according to the change of the conveying medium pressure of the airtight cavity 8, and the reading of the pressure gauge on the airtight cavity 8 is controlled to be kept at 60 Psi - 70 Psi for 10 seconds; If the pointer of the pressure gauge 1 falls back, it means that the product sealing performance is unqualified. Within 10 seconds of pressure holding, if the pointer does not rise or fall, it means that the product sealing performance is qualified.

[0045] The above description of the embodiments is for the convenience of those of ordinary skill in the art to understand and use the invention. It is obvious that those who are familiar with the technology in this field can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative labor. Therefore, the present invention is not limited to the above embodiments, and the improvements and modifications made by those skilled in the art without departing from the scope of the present invention according to the disclosure of the present invention should be within the protection scope of the present invention.

Claims

1. A special inspection tool for measuring the airtight leakage of products, characterized in that, It includes an airtight cavity, a cavity sealing upper cover, a taper ejector pin, and a pipeline joint. Among them, a detection avoidance hole is machined at the part installation position on one side surface of the airtight cavity, and the cavity sealing upper cover is detachably and hermetically installed on the opposite side surface. When the part to be measured is installed on the airtight cavity, the taper through hole to be measured of the part to be measured is aligned with the detection avoidance hole. The bottom of the taper ejector pin abuts against the cavity sealing upper cover, the top passes through the detection avoidance hole, and extends into and tightly abuts against the taper through hole to be measured. A pipeline joint connected to an external charging pipeline is also provided on the airtight cavity, and a pressure gauge is also provided on the pipeline joint or the airtight cavity; A regulating valve for regulating air pressure and flow is also provided on the pipeline joint; A compression elastic member is also provided between the cavity sealing upper cover and the taper ejector pin, and the telescopic direction of the compression elastic member is the same as the direction in which the taper ejector pin extends into the taper through hole to be measured; The cavity sealing upper cover and the airtight cavity are locked and fixed by second screws; An upper cover sealing ring is also provided at the contact part between the cavity sealing upper cover and the airtight cavity; The part to be measured is locked and fixed at the part installation position of the airtight cavity by first screws; A part sealing ring is also provided at the contact part between the part to be measured and the airtight cavity.

2. The special fixture for measuring the airtight leakage of a product according to claim 1, characterized in that, The compression elastic member is a standard spring.

3. A special fixture for measuring airtight leakage of products according to claim 1, characterized in that, The pipeline joint is an adjustable airtight joint.

4. A special inspection tool for measuring the airtight leakage of a product according to claim 1, characterized in that, A ejector pin sealing ring is also provided between the taper ejector pin and the airtight cavity.

Images