Air tightness detection jig structure of blower assembly

Abstract

The utility model relates to the technical field of detection jigs, in particular to an air tightness detection jig structure for a blower assembly, which comprises a pressing plate, a matching plate, a supporting seat and a bottom plate, an air inlet valve is mounted on the surface of the pressing plate, an exhaust hole matched with an exhaust pipe for use is formed in the surface of the pressing plate, and a sealing ring for preventing air leakage is connected to the surface of a base station; air tightness detection is carried out on a product in an air pressure and ultrasonic mode, the propagation speed of ultrasonic waves under different air pressure conditions can be measured more accurately through assistance of 20 KMP air pressure, and therefore the accuracy of a measurement result is improved, the propagation characteristic of the ultrasonic waves can be affected by changes of the air pressure, and the propagation parameters of the ultrasonic waves can be adjusted through matched use; meanwhile, the air pressure can help ultrasonic waves to adapt to environmental changes, so that the measurement stability is guaranteed, the accuracy of target detection and positioning is improved, and the traditional mode that pure pressure is pushed to a critical value pressure measurement product, and the product is damaged is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of detection jigs, in particular to an airtightness detection jig structure for a hair dryer assembly. Background Technique

[0002] A hair dryer is a common household appliance mainly used for quickly drying hair. It drives a fan through a built-in electric motor, sucks air into the hair dryer, then heats the air through a heating element, and finally blows out hot air through a nozzle. The design of a hair dryer usually includes a handle, a switch, a temperature adjustment button, a wind speed adjustment button, and a mesh cover for protecting the user from high temperatures.

[0003] Airtightness detection is a test method for determining whether an object can keep its internal gas from leaking. This detection is usually used to evaluate the sealing performance of a product to ensure that it can meet specific performance requirements during actual use. An airtightness detection process is also required in a hair dryer to ensure that there is no leakage when the hair dryer blows air.

[0004] Existing airtightness detection usually adopts the method of pressurizing and then observing whether there is gas overflow, but its single function does not have the ability to obtain internal information of the material to infer the service life of the product. It can only detect the maximum bearing pressure and yield strength. However, using the pressure detection method, the product has already been partially damaged during the detection process. Therefore, it is necessary to improve the traditional detection structure to reduce the damage caused to the product during the detection process. For this reason, the inventor of the present invention proposes an airtightness detection jig structure for a hair dryer assembly to solve the above-mentioned technical problems. Summary of the Utility Model

[0005] The utility model aims to provide a technical solution to overcome the above deficiencies.

[0006] An airtightness detection jig structure for a hair dryer assembly includes a pressing plate, a mating plate, a support base, and a bottom plate. The support base is located between the mating plate and the bottom plate and abuts against one end of the mating plate and the bottom plate respectively. A detection table is provided on the surface of the pressing plate. One end of the detection table is a connecting seat. A base matching the detection table is provided on the surface of the mating plate. An air flow channel is opened inside the pressing plate. An air inlet valve is installed on the surface of the pressing plate. One end of the air inlet valve is connected to an air inlet pipe. One end of the air inlet pipe extends to the surface of the detection table. An exhaust pipe is provided inside the air flow channel. The exhaust pipe extends to the surface of the pressing plate. An exhaust hole matching the exhaust pipe is opened on the surface of the pressing plate. A sealing ring for preventing gas leakage is connected to the surface of the base.

[0007] When conducting the detection, place the product between the detection table and the base table. Then, inject air pressure of 20KMP for the ultrasonic part into the intake valve above. Due to the pressing between the pressing plate and the mating plate, the product is pressed between the detection table and the base table. At the same time, the pressure causes the sealing ring to press on the product, thereby blocking the air holes and forming a sealed environment. Then, stop injecting air pressure and release the air for 10 to 20 seconds. At the same time, observe whether the gas flows back from the air flow channel and whether there is air leakage. Then, observe whether there is gas flowing out inside the exhaust pipe. If all the above detection processes are correct, the detection process is completed;

[0008] When the pressure is released, the sealing ring disengages from the air holes of the product, and the air pressure returns to normal. The gas is discharged from the exhaust pipe in the air flow channel under the influence of pressure, and thus is discharged outside the pressing plate through the exhaust holes;

[0009] At the same time, ultrasonic detection is used to obtain the internal information of the material. The basic principle of ultrasonic detection is to utilize the propagation speed and attenuation characteristics of ultrasonic waves in the material to obtain the internal information of the material. By measuring the propagation time, distance, and attenuation of ultrasonic waves, it can be judged whether the quality, structure, and performance of the material meet the requirements. Ultrasonic detection has the advantages of non-destructiveness, high sensitivity, and high resolution.

[0010] Furthermore, an inner cylinder for preventing the diffusion of ultrasonic waves is connected to the surface of the mating plate. A sleeve for protecting the inner cylinder is installed on the outer side of the inner cylinder. The inner cylinder and the sleeve are of a detachable structure, and opening grooves for accommodating the base table are provided in the middle of the inner cylinder and the sleeve; this design can effectively limit the propagation of ultrasonic waves in a specific area, reduce the unnecessary loss of energy. At the same time, the detachable structure of the inner cylinder and the sleeve is convenient for maintenance and replacement, improving the service life of the equipment and the flexibility of operation. The setting of the opening grooves allows the base table to be stably installed between the inner cylinder and the sleeve, ensuring the stability and accuracy of the entire device.

[0011] Furthermore, a mating groove for mating and installing with the base table is provided on the surface of the mating plate. The mating plate is connected to the support base through mounting screws; adopting this design enables the precise alignment and stable combination between the mating groove and the base table. The design of the mating groove enables the base table to closely fit the mating plate, thereby reducing displacement or loosening caused by vibration or external forces during use. In addition, by connecting with mounting screws, it can be conveniently disassembled and maintained, while ensuring the reliability of the connection. This structural design not only improves the overall stability and durability, but also facilitates later adjustment and replacement, thereby extending the service life of the equipment and reducing the maintenance cost.

[0012] Furthermore, one end of the base is a connecting plate. A plug hole is provided in the middle of the base. A plug rod is connected to the inner surface of the plug hole, and one end of the plug rod extends into the inside of the mating plate. The cooperation of the plug hole and the plug rod can provide additional support and stability, preventing the base from shifting or loosening when subjected to external forces. In addition, the plug rod extending into the inside of the mating plate can ensure the tightness of the connection and uniform force distribution, thereby improving the load-bearing capacity and durability of the overall structure.

[0013] Furthermore, a positioning rod is installed inside the pressing plate, and a positioning sleeve paired with the positioning rod is provided inside the mating plate. The positioning rod is in a stepped shape, and the positioning rod and the positioning sleeve are coaxially arranged.

[0014] The coaxial arrangement of the positioning rod and the positioning sleeve can ensure the precise alignment of the pressing plate and the mating plate during assembly. Since the positioning rod is in a stepped shape, multi-point contact can be achieved in the positioning sleeve of the mating plate, thereby improving the connection stability and load-bearing capacity. This design helps to reduce assembly errors, improve the strength and durability of the overall structure. At the same time, the coaxial arrangement also facilitates automated assembly during the production process, improving production efficiency.

[0015] Furthermore, the pressing plate and the mating plate are of a separable structure, and the inspection table and the base are of a coaxially arranged structure. The separable structure between the pressing plate and the mating plate can achieve quick replacement and adjustment, improving the flexibility and adaptability of the equipment. The coaxially arranged structure between the inspection table and the base can ensure the inspection accuracy, reduce errors, and improve the inspection efficiency.

[0016] Compared with the prior art, the beneficial effects of the present utility model are as follows: The airtightness of the product is detected by means of air pressure and ultrasonic waves. With the assistance of an air pressure of 20 KMP, the propagation speed of ultrasonic waves under different air pressure conditions can be measured more accurately, thereby improving the accuracy of the measurement results. The change in air pressure can affect the propagation characteristics of ultrasonic waves. The combined use can adjust the propagation parameters of ultrasonic waves to adapt to a wider range of measurement environments and conditions. At the same time, the air pressure can help the ultrasonic waves adapt to environmental changes, ensuring the stability of the measurement and thus improving the accuracy of target detection and positioning. It improves the traditional method that causes damage to the product itself by simply pushing the pure pressure to the critical value for pressure measurement.

[0017] The product is pressed by the pressure generated by the sealing ring to block the air holes, forming a sealed environment. After deflating for 10 seconds to 20 seconds, observe whether the gas flows back from the air flow channel and whether there is air leakage. It improves the method of squeezing the product by the pressure caused by mechanical force, reduces the degree of product damage through the sealing ring, and uses a simple and operable process for detection. While simplifying the equipment structure, it reduces the manufacturing cost expenditure, achieving a simplification effect. Description of the Drawings

[0018] Figure 1 It is the front view of the airtightness detection fixture structure of a hair dryer assembly;

[0019] Figure 2 It is the perspective view of the airtightness detection fixture structure of a hair dryer assembly;

[0020] Figure 3 It is another perspective view of the airtightness detection fixture structure of a hair dryer assembly;

[0021] Figure 4 It is yet another perspective view of the airtightness detection fixture structure of a hair dryer assembly;

[0022] Figure 5 It is the exploded view of the airtightness detection fixture structure of a hair dryer assembly;

[0023] Figure 6 It is another exploded view of the airtightness detection fixture structure of a hair dryer assembly;

[0024] Figure 7 It is yet another exploded view of the airtightness detection fixture structure of a hair dryer assembly;

[0025] Figure 8 It is the partial exploded view of the airtightness detection fixture structure of a hair dryer assembly;

[0026] Figure 9 It is another partial exploded view of the airtightness detection fixture structure of a hair dryer assembly;

[0027] Figure 10 It is the perspective view of the base in the airtightness detection fixture structure of a hair dryer assembly;

[0028] Figure 11 It is another perspective view of the base in the airtightness detection fixture structure of a hair dryer assembly;

[0029] Figure 12 It is the modeling reference diagram of the airtightness detection fixture structure of a hair dryer assembly;

[0030] Figure 13 It is another modeling reference diagram of the airtightness detection fixture structure of a hair dryer assembly;

[0031] In the figure: pressing plate - 1, mating plate - 2, support base - 3, bottom plate - 4, detection table - 5, connecting seat - 6, base - 7, air flow channel - 8, intake valve - 9, intake pipe - 10, exhaust pipe - 11, exhaust hole - 12, inner cylinder - 13, sleeve - 14, opening groove - 15, mating groove - 16, mounting screw - 17, connecting plate - 18, plug hole - 19, plug rod - 20, positioning rod - 21, positioning sleeve - 22, sealing ring - 23. Detailed implementation method

[0032] The present utility model will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0033] In this embodiment, please refer to Figures 1-13 , a jig structure for detecting the airtightness of a hair dryer assembly in its specific implementation includes a pressing plate 1, a matching plate 2, a support base 3 and a bottom plate 4. The support base 3 is located between the matching plate 2 and the bottom plate 4 and abuts against one end of the matching plate 2 and the bottom plate 4 respectively. A detection table 5 is provided on the surface of the pressing plate 1. One end of the detection table 5 is a connection seat 6. A base 7 paired with the detection table 5 is provided on the surface of the matching plate 2. An air flow channel 8 is opened inside the pressing plate 1. An air inlet valve 9 is installed on the surface of the pressing plate 1. One end of the air inlet valve 9 is connected to an air inlet pipe 10. One end of the air inlet pipe 10 extends to the surface of the detection table 5. An exhaust pipe 11 is provided inside the air flow channel 8. The exhaust pipe 11 extends to the surface of the pressing plate 1. An exhaust hole 12 paired with the exhaust pipe 11 is opened on the surface of the pressing plate 1. A sealing ring 23 for preventing gas leakage is connected to the surface of the base 7;

[0034] During the detection, the product is placed between the detection table 5 and the base 7, and then a pressure of 20 KMP of ultrasonic part is injected through the air inlet valve 9 above. Due to the pressing between the pressing plate 1 and the matching plate 2, the product is pressed between the detection table 5 and the base 7. At the same time, the pressure causes the sealing ring 23 to press on the product, thereby blocking the air holes and forming a sealed environment. Then, the injection of air pressure is stopped, and the air is released for 10 seconds to 20 seconds. At the same time, observe whether the gas flows back from the air flow channel 8 and whether there is air leakage. Then, observe whether there is gas flowing out inside the exhaust pipe 11. If the above detection process is correct, the detection process is completed;

[0035] When the pressure is released, the sealing ring 23 disengages from the air holes of the product, the air pressure returns to normal, and the gas is discharged from the exhaust pipe 11 in the air flow channel 8 under the influence of the pressure, and thus is discharged outside the pressing plate 1 through the exhaust hole 12;

[0036] At the same time, ultrasonic detection is used to obtain the internal information of the material. The basic principle of ultrasonic detection is to utilize the speed and attenuation characteristics of ultrasonic waves propagating in the material to obtain the internal information of the material. By measuring the propagation time, distance and attenuation of ultrasonic waves, it can be judged whether the quality, structure and performance of the material meet the requirements. Ultrasonic detection has the advantages of non-destructiveness, high sensitivity and high resolution;

[0037] With the assistance of a pressure of 20KMP, the propagation speed of ultrasonic waves under different pressure conditions can be measured more accurately, thereby improving the accuracy of the measurement results. The change in pressure can affect the propagation characteristics of ultrasonic waves. By using them in combination, the propagation parameters of ultrasonic waves can be adjusted to adapt to a wider range of measurement environments and conditions. At the same time, the pressure can help the ultrasonic waves adapt to environmental changes, ensuring the stability of the measurement and thus improving the accuracy of target detection and positioning.

[0038] An inner cylinder 13 for preventing the diffusion of ultrasonic waves is connected to the surface of the mating plate 2. A sleeve 14 for protecting the inner cylinder 13 is installed on the outer side of the inner cylinder 13. The structure between the inner cylinder 13 and the sleeve 14 is detachable. Open slots 15 for accommodating the base 7 are provided in the middle of both the inner cylinder 13 and the sleeve 14. This design can effectively limit the propagation of ultrasonic waves in a specific area, reducing unnecessary energy loss. At the same time, the detachable structure of the inner cylinder 13 and the sleeve 14 is convenient for maintenance and replacement, improving the service life of the equipment and the flexibility of operation. The setting of the open slots 15 allows the base 7 to be stably installed between the inner cylinder 13 and the sleeve 14, ensuring the stability and accuracy of the entire device.

[0039] A mating groove 16 for mating installation with the base 7 is provided on the surface of the mating plate 2. The mating plate 2 is connected to the support base 3 through mounting screws 17. With this design, precise alignment and firm combination between the mating groove 16 and the base 7 can be achieved. The design of the mating groove 16 enables the base 7 to closely fit the mating plate 2, thereby reducing displacement or loosening caused by vibration or external forces during use. In addition, by connecting through the mounting screws 17, it is convenient for disassembly and maintenance, while ensuring the reliability of the connection. This structural design not only improves the overall stability and durability, but also facilitates later adjustment and replacement, thus extending the service life of the equipment and reducing the maintenance cost.

[0040] One end of the base 7 is a connecting plate 18. A plug hole 19 is provided in the middle of the base 7. A plug rod 20 is connected to the inner surface of the plug hole 19. One end of the plug rod 20 extends into the interior of the mating plate 2. The combined use of the plug hole 19 and the plug rod 20 can provide additional support and stability, preventing the base 7 from shifting or loosening under external forces. In addition, the plug rod 20 extending into the interior of the mating plate 2 can ensure the tightness of the connection and uniform force application, thereby improving the load-bearing capacity and durability of the overall structure.

[0041] A positioning rod 21 is installed inside the pressing plate 1. A positioning sleeve 22 paired with the positioning rod 21 is provided inside the mating plate 2. The positioning rod 21 is in a stepped shape. The positioning rod 21 and the positioning sleeve 22 are coaxially arranged. The positioning rod 21 is located on the surface of the connecting seat 6, and the connecting seat 6 is used to fix the positioning rod 21.

[0042] The positioning rod 21 and the positioning sleeve 22 are coaxially arranged, which can ensure the precise alignment of the pressing plate 1 and the mating plate 2 during assembly. Since the positioning rod 21 is in a stepped shape, it can achieve multi-point contact in the positioning sleeve 22 of the mating plate 2, thereby improving the connection stability and load-bearing capacity. This design helps to reduce assembly errors, improve the strength and durability of the overall structure. At the same time, the coaxial arrangement also facilitates automatic assembly during the production process, improving production efficiency.

[0043] A separate structure is adopted between the pressing plate 1 and the mating plate 2, and a coaxial arrangement structure is adopted between the detection table 5 and the base 7; a separate structure is adopted between the pressing plate 1 and the mating plate 2, which can achieve quick replacement and adjustment, improving the flexibility and adaptability of the equipment. A coaxial arrangement structure is adopted between the detection table 5 and the base 7, which can ensure the detection accuracy, reduce errors, and improve the detection efficiency.

[0044] The design key point of the present utility model lies in: adopting the methods of air pressure and ultrasound to conduct airtightness detection on the product. This detection method is assisted by a pressure detector and an ultrasonic detector. With the assistance of a 20KMP air pressure, the propagation speed of ultrasound under different air pressure conditions can be measured more accurately, thereby improving the accuracy of the measurement results. The change in air pressure can affect the propagation characteristics of ultrasound. By using them in combination, the propagation parameters of ultrasound can be adjusted to adapt to a wider range of measurement environments and conditions. At the same time, the air pressure can help the ultrasound to adapt to environmental changes, ensuring the stability of the measurement and thus improving the accuracy of target detection and positioning.

[0045] Press the product through pressure to block the air holes, forming a sealed environment. Release the air for 10 to 20 seconds, and at the same time observe whether the gas flows back from the air flow channel 8 and whether there is air leakage. Use a simple and operable process for detection, which simplifies the equipment structure and reduces the manufacturing cost expenditure, achieving a simplification effect.

[0046] The above content is a further detailed description of the present utility model in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present utility model is only limited to these descriptions. For those of ordinary skill in the technical field to which the present utility model belongs, without departing from the concept of the present utility model, several simple deductions or substitutions can be made, and all should be regarded as the protection scope of the present utility model.

Claims

1. An airtightness detection fixture structure for a hair dryer assembly, comprising a pressing plate, a matching plate, a support seat and a bottom plate, characterized in that: The support base is located between the mating plate and the bottom plate and abuts against one end of the mating plate and the bottom plate respectively. A detection table is provided on the surface of the pressing plate. One end of the detection table is a connecting seat. A base table paired with the detection table is provided on the surface of the mating plate. An air flow channel is formed inside the pressing plate. An air inlet valve is installed on the surface of the pressing plate. One end of the air inlet valve is connected to an air inlet pipe. One end of the air inlet pipe extends to the surface of the detection table. An exhaust pipe is provided inside the air flow channel. The exhaust pipe extends to the surface of the pressing plate. An exhaust hole paired with the exhaust pipe is formed on the surface of the pressing plate. A sealing ring for preventing gas leakage is connected to the surface of the base table.

2. The airtightness detection fixture structure of a hair dryer assembly according to claim 1, characterized in that: An inner cylinder for preventing ultrasonic diffusion is connected to the surface of the mating plate. A sleeve for protecting the inner cylinder is installed on the outer side surface of the inner cylinder. The structure between the inner cylinder and the sleeve is detachable. Open slots for accommodating the base table are formed in the middle of the inner cylinder and the sleeve.

3. The airtightness detection fixture structure of a hair dryer assembly according to claim 2, characterized in that: A mating groove paired with the base table is formed on the surface of the mating plate. The mating plate is connected to the support base by mounting screws.

4. A hermeticity detection fixture structure for a hair dryer assembly according to any one of claims 1-3, characterized in that: One end of the base table is a connecting plate. A plug hole is formed in the middle of the base table. A plug rod is connected to the inner surface of the plug hole. One end of the plug rod extends into the inside of the mating plate.

5. A hermeticity detection fixture structure for a hair dryer assembly according to any one of claims 1-3, characterized in that: A positioning rod is installed inside the pressing plate. A positioning sleeve paired with the positioning rod is provided inside the mating plate. The positioning rod is in a stepped shape and is coaxially arranged with the positioning sleeve.

6. A structure of an airtightness detection fixture for a hair dryer assembly according to any one of claims 1-3, characterized in that: The structure between the pressing plate and the mating plate is a separable structure. The detection table and the base table are coaxially arranged.

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