An air tightness detection device

Abstract

The utility model discloses a kind of air-tight detection devices, including detection table, lift pressure mechanism, air-tight detection plate, presser plate and multiple sets of elastic pressure rod, air-tight detection plate is detachably fixed on detection table, presser plate is located air-tight detection plate top and is driven lifting by lift pressure mechanism, and elastic pressure rod is fixed in presser plate bottom side to press product on air-tight detection plate.The utility model solves the technical problem that existing air-tight detection device poor adaptability, insufficient pressure stability, low detection precision, through detachable design, elastic pressure structure and accurate airway layout, multiple specifications product compatibility, stable pressure and high efficient accurate detection are realized, and detection efficiency and reliability are improved.

Description

Technical Field

[0001] This utility model relates to airtightness testing technology, specifically to an airtightness testing device for testing the sealing performance of the sealing ring on the bottom side of a cap-shaped product. Background Technology

[0002] In the manufacturing of cap-shaped products, the sealing performance of the bottom sealing ring directly affects the product's performance and lifespan. Air tightness testing is a key process to ensure product quality.

[0003] Existing airtightness testing devices have several shortcomings: First, the airtightness testing plate is mostly fixedly connected to the testing platform, making it impossible to replace or adjust it according to the size and rubber ring position of different specifications of cap-shaped products. This results in poor adaptability, requiring separate testing devices for different products and increasing production costs. Second, the product clamping method is mostly rigid, and the clamping force cannot be flexibly adjusted, which can easily lead to product deformation or air leakage due to insufficient clamping, affecting the testing accuracy. Third, the fit and seal between the airtightness testing plate and the product's rubber ring is insufficient, and the air intake channel layout is unreasonable, which can easily lead to leakage or uneven distribution of the test airflow, further reducing the reliability of the test results. Fourth, the guiding stability of the lifting and clamping mechanism is poor, and the pressure plate is prone to deviation during lifting and lowering, resulting in inaccurate product clamping position and indirectly affecting the testing effect.

[0004] These problems result in low detection efficiency and poor accuracy of existing airtightness testing devices, making it difficult to meet the high-quality testing needs of diverse products. Therefore, there is an urgent need to design an airtightness testing device that is highly adaptable, has stable clamping, and provides accurate detection. Utility Model Content

[0005] To overcome the above-mentioned shortcomings of the prior art, this utility model provides an airtightness testing device, which aims to solve the technical problems of poor adaptability, insufficient clamping stability and low detection accuracy of the existing device, and achieve the purpose of compatibility with multiple product specifications, stable clamping and efficient and accurate detection.

[0006] To achieve the above and other related objectives, the technical solution provided by this utility model is: an airtightness testing device for testing the sealing performance of the sealing ring on the bottom side of a cap-shaped product, comprising a testing platform, a lifting and pressing mechanism, an airtightness testing plate, a pressure plate, and multiple sets of elastic pressure rods. The airtightness testing plate is detachably and fixedly installed on the testing platform. The pressure plate is located above the airtightness testing plate and is driven to rise and fall by the lifting and pressing mechanism fixed on the testing platform. The multiple sets of elastic pressure rods are fixed to the bottom side of the pressure plate and are used to press the product onto the airtightness testing plate.

[0007] The preferred technical solution is as follows: the lifting and pressing mechanism consists of multiple guide columns, a movable plate, a fixed plate and a lifting cylinder. The multiple guide columns are vertically fixed on the testing platform. The movable plate is slidably connected to the multiple guide columns through multiple guide sleeves. The fixed plate is fixed to the top of the multiple guide columns. The lifting cylinder is fixed on the fixed plate and is used to drive the movable plate to slide up and down along the guide columns.

[0008] The preferred technical solution is that the pressure plate is detachably fixed to the bottom side of the movable plate by bolts.

[0009] The preferred technical solution is as follows: the airtightness testing plate is detachably and fixedly installed on the testing platform through multiple sets of adjustable clamping mechanisms. The adjustable clamping mechanism consists of a support block, a pressure block, and an adjusting bolt. The support block has an inclined slope with multiple steps along the inclined direction. The pressure block is a strip structure, with one end pressed against the airtightness testing plate and the other end pressed against the corresponding step based on the thickness of the airtightness testing plate. The pressure block also has a strip-shaped hole along its length, and the adjusting bolt passes through the strip-shaped hole and is threadedly connected to the screw hole on the testing platform.

[0010] A preferred technical solution is as follows: the top side of the airtightness testing plate is provided with an annular groove corresponding to the rubber ring on the bottom side of the product; the airtightness testing plate is provided with an air inlet channel; the inlet end of the air inlet channel is located on the side of the airtightness testing plate; and the outlet end of the air inlet channel is located on the top side of the airtightness testing plate and inside the annular groove.

[0011] A preferred technical solution is as follows: the elastic pressure rod is composed of a bushing, a pressure rod, a pressure head, and a spring. The bushing is fixed to the bottom side of the pressure plate and has a stepped hole structure inside. The pressure rod is configured as a stepped column structure. The large-diameter section of the pressure rod is movably inserted into the large-diameter section of the stepped hole, and the small-diameter section of the pressure rod is movably inserted into the small-diameter section of the stepped hole. The pressure head is fixed to one end of the small-diameter section of the pressure rod, and the spring is sleeved on the small-diameter section of the pressure rod. One end of the spring abuts against the bushing, and the other end abuts against the pressure head.

[0012] Due to the application of the above technical solution, the beneficial effects of this utility model are as follows:

[0013] This utility model discloses an airtightness testing device, including a testing platform, a lifting and pressing mechanism, an airtightness testing plate, a pressure plate, and multiple sets of elastic pressure rods. The airtightness testing plate is detachably fixed to the testing platform. The pressure plate is located above the airtightness testing plate and is driven to rise and fall by the lifting and pressing mechanism. The elastic pressure rods are fixed to the bottom side of the pressure plate to press the product firmly onto the airtightness testing plate. This utility model solves the technical problems of poor adaptability, insufficient pressing stability, and low testing accuracy of existing airtightness testing devices. Through a detachable design, elastic pressing structure, and precise air passage layout, it achieves compatibility with multiple product specifications, stable pressing, and efficient and accurate testing, thereby improving testing efficiency and reliability. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the airtightness testing device of this utility model after the airtightness testing plate and pressure plate have been removed.

[0015] Figure 2 for Figure 1 Enlarged diagram of point A in the middle.

[0016] Figure 3 This is a structural diagram of the airtightness testing plate and pressure plate involved in this utility model in the assembled product state.

[0017] Figure 4 This is a schematic diagram of the airtightness testing plate involved in this utility model. Detailed Implementation

[0018] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0019] Please see Figures 1-4 It should be noted that in the description of this utility model, the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. These terms are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance. The terms "horizontal," "vertical," and "suspended," etc., do not indicate that the component must be absolutely horizontal or suspended, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0020] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0021] Example:

[0022] like Figure 1 As shown, according to an overall technical concept of this utility model, an airtightness testing device is provided for testing the sealing performance of the sealing ring on the bottom side of a cap-shaped product, including a testing platform 1, a lifting and pressing mechanism 2, an airtightness testing plate 3, a pressure plate 4, and multiple sets of elastic pressure rods 5.

[0023] like Figure 2 As shown, the airtightness testing plate 3 is detachably and fixedly installed on the testing platform 1 through multiple sets of adjustable clamping mechanisms 6. The adjustable clamping mechanism 6 consists of a support block 61, a pressure block 62, and an adjusting bolt (not shown). The support block 61 has an inclined ramp 64, and multiple steps 65 are provided on the ramp 64 along the inclined direction. The pressure block 62 is a strip-shaped structure, with one end pressed onto the airtightness testing plate 3, and the other end pressed onto the corresponding step 65 of the support block 61 according to the thickness of the airtightness testing plate 3. The pressure block 62 has a strip-shaped hole 66 along its length. The adjusting bolt passes through the strip-shaped hole 66 and is threadedly connected to the screw hole on the testing platform 1. By tightening the adjusting bolt, the pressure block 62 can be fixed, thereby realizing the detachable installation and thickness adaptation of the airtightness testing plate 3.

[0024] like Figure 1 As shown, the lifting and pressing mechanism 2 consists of multiple guide columns 21, a movable plate 22, a fixed plate 23, and a lifting cylinder 24. The multiple guide columns 21 are vertically fixed on the testing table 1. The movable plate 22 is slidably connected to the multiple guide columns 21 through multiple guide sleeves 25. The fixed plate 23 is fixed on the top of the guide columns 21. The lifting cylinder 24 is fixed on the fixed plate 23, and its output end is connected to the movable plate 22 to drive the movable plate 22 to slide up and down along the guide columns 21 to ensure the stability of the lifting process.

[0025] like Figure 3As shown, the pressure plate 4 is detachably fixed to the bottom side of the movable plate 22 by bolts, making it easy to replace the corresponding pressure plate 4 according to product specifications. Multiple sets of elastic pressure rods 5 are fixed to the bottom side of the pressure plate 4. The elastic pressure rod 5 consists of a bushing 51, a pressure rod 52, a pressure head 53, and a spring 54. The bushing 51 is fixed to the bottom side of the movable plate 22 and has a stepped hole structure inside. The pressure rod 52 is a stepped column structure. The large diameter section of the pressure rod 52 is inserted vertically into the large diameter section of the stepped hole, and the small diameter section is inserted vertically into the small diameter section of the stepped hole. The pressure head 53 is fixed to one end of the small diameter section of the pressure rod 52. The spring 54 is sleeved on the small diameter section of the pressure rod 52, with one end abutting against the bushing 51 and the other end abutting against the pressure head 53. The product is flexibly pressed by the elastic force of the spring 54.

[0026] like Figure 4 As shown, the top side of the airtightness testing plate 3 is provided with an annular groove 31 corresponding to the rubber ring on the bottom side of the product, which facilitates product positioning. The airtightness testing plate 3 is provided with an air inlet channel. The inlet end 321 of the air inlet channel is located on the side of the airtightness testing plate 3 for connecting to an external air source. The outlet end 322 is located on the top side of the airtightness testing plate 3 and is located inside the annular groove 31, so that the detection airflow is accurately applied to the rubber ring sealing area.

[0027] During testing, the corresponding airtightness testing plate 3 and pressure plate 4 are selected according to the specifications of the product to be tested. The airtightness testing plate 3 is fixed on the testing table 1 by the adjustable clamping mechanism 6. The product is placed on the airtightness testing plate 3, so that the rubber ring on the bottom of the product is embedded in the annular groove 31. The lifting cylinder 24 is activated, driving the movable plate 22 to lower the pressure plate 4. The pressure head 53 of the elastic pressure rod 5 contacts the product and is compressed by the spring 54 to generate an elastic clamping force, pressing the product tightly onto the airtightness testing plate 3. Test gas is introduced through the air inlet channel 32. After maintaining a certain pressure, whether the test gas leaks can determine the sealing performance of the product's sealing rubber ring.

[0028] Therefore, this utility model has the following advantages:

[0029] High adaptability: The airtightness test plate adopts a detachable design and is equipped with an adjustable clamping mechanism. The corresponding airtightness test plate can be quickly replaced according to the size and rubber ring position of different specifications of cap-shaped products. It can also be adapted to airtightness test plates of different thicknesses. There is no need to configure a separate testing device, which reduces production costs and meets diverse testing needs.

[0030] Stable and reliable clamping: The elastic pressure bar provides elastic clamping force through a spring, which can flexibly adjust the clamping degree and avoid product deformation caused by rigid clamping. At the same time, it ensures that the product fits tightly with the airtightness test plate to prevent air leakage. The lifting and clamping mechanism ensures the guiding accuracy of the pressure plate lifting process through the cooperation of multiple guide columns and guide sleeves, avoids deviation, and further improves the accuracy of the clamping position.

[0031] High testing accuracy: The annular groove on the top side of the airtightness testing plate is precisely matched with the rubber ring on the bottom side of the product, enhancing the fit and sealing performance; the outlet end of the air inlet channel is located inside the annular groove, so that the test airflow directly acts on the rubber ring sealing area, the airflow distribution is uniform, leakage interference is reduced, and the accuracy and reliability of sealing performance testing are significantly improved.

[0032] Convenient and efficient operation: The overall structure is reasonably designed, and the lifting cylinder drives the pressure plate to lift and lower to achieve automated clamping. The detachable structure facilitates disassembly and maintenance, greatly improving the convenience and efficiency of the testing operation.

[0033] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. An airtightness testing device for testing the sealing performance of a sealing ring on the bottom side of a cap-shaped product, characterized in that: The device includes a testing platform, a lifting and pressing mechanism, an airtightness testing plate, a pressure plate, and multiple sets of elastic pressure rods. The airtightness testing plate is detachably and fixedly installed on the testing platform. The pressure plate is located above the airtightness testing plate and is driven to rise and fall by the lifting and pressing mechanism fixed on the testing platform. The multiple sets of elastic pressure rods are fixed to the bottom side of the pressure plate and are used to press the product onto the airtightness testing plate.

2. The airtightness detection device according to claim 1, characterized in that: The lifting and pressing mechanism consists of multiple guide columns, a movable plate, a fixed plate, and a lifting cylinder. The multiple guide columns are vertically fixed on the testing platform. The movable plate is slidably connected to the multiple guide columns through multiple guide sleeves. The fixed plate is fixed to the top of the multiple guide columns. The lifting cylinder is fixed on the fixed plate and is used to drive the movable plate to slide up and down along the guide columns.

3. The airtightness detection device according to claim 2, characterized in that: The pressure plate is detachably fixed to the bottom side of the movable plate by bolts.

4. The airtightness detection device according to claim 1, characterized in that: The airtightness testing plate is detachably and fixedly installed on the testing platform through multiple sets of adjustable clamping mechanisms. The adjustable clamping mechanism consists of a support block, a pressure block, and an adjusting bolt. The support block has an inclined slope with multiple steps along the inclined direction. The pressure block is a strip structure, with one end pressed against the airtightness testing plate and the other end pressed against the corresponding step based on the thickness of the airtightness testing plate. The pressure block also has a strip-shaped hole along its length, and the adjusting bolt passes through the strip-shaped hole and is threadedly connected to the screw hole on the testing platform.

5. The airtightness detection device according to claim 1, characterized in that: The top side of the airtightness testing plate is provided with an annular groove corresponding to the rubber ring on the bottom side of the product. The airtightness testing plate is provided with an air inlet channel. The inlet end of the air inlet channel is located on the side of the airtightness testing plate, and the outlet end of the air inlet channel is located on the top side of the airtightness testing plate and inside the annular groove.

6. The airtightness detection device according to claim 1, characterized in that: The elastic pressure rod consists of a bushing, a pressure rod, a pressure head, and a spring. The bushing is fixed to the bottom side of the pressure plate and has a stepped hole structure inside. The pressure rod is configured as a stepped column structure. The large-diameter section of the pressure rod is movably inserted into the large-diameter section of the stepped hole, and the small-diameter section of the pressure rod is movably inserted into the small-diameter section of the stepped hole. The pressure head is fixed to one end of the small-diameter section of the pressure rod, and the spring is sleeved on the small-diameter section of the pressure rod. One end of the spring abuts against the bushing, and the other end abuts against the pressure head.

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