A valve detection assembly

Abstract

The application provides a valve nozzle detection assembly, relates to the technical field of valve nozzle air leakage detection, and comprises a preliminary detection closed container, a pressure source and a detector. The preliminary detection closed container comprises a preliminary detection mounting plate and a preliminary detection pressure chamber. The preliminary detection mounting plate is uniformly provided with a plurality of preliminary detection mounting holes for mounting valve nozzles, a preliminary detection connecting hole for connecting the pressure source, and a preliminary detection detection hole for mounting the detector. One end of the preliminary detection pressure chamber is sealed, and the other end is provided with a sealing opening for connecting the preliminary detection mounting plate. A sealing element is arranged between the sealing opening and the preliminary detection mounting plate. The pressure source is used for pressurizing the inside of the preliminary detection closed container through the preliminary detection connecting hole. The detector is used for detecting the pressure change in the inside of the preliminary detection closed container through the preliminary detection detection hole. The application can detect a plurality of valve nozzles at a time, improves the detection efficiency, simulates the actual working environment of the valve nozzle, and the detection result is accurate.

Description

Technical Field

[0001] This utility model relates to the field of valve stem leakage detection technology, and in particular to a valve stem detection component. Background Technology

[0002] As a crucial interface component between the tire and the rim, the valve stem performs core functions such as tire inflation, pressure maintenance, and pressure release. Its structural integrity and sealing performance directly impact driving safety, tire lifespan, and fuel economy. Common types of tire valve stems include rubber-based valve stems, metal valve stems, and sensor valve stems integrated with tire pressure monitoring systems. During valve stem production, sealing performance testing is paramount, especially when multiple valve stems need to be inspected quickly. Current technologies typically rely on manual visual inspection or simple auxiliary tools, which is prone to omissions, inefficient, inconsistent, and unsuitable for assembly line production. Utility Model Content

[0003] The purpose of this invention is to provide a valve stem detection component to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A valve stem testing assembly includes: a pre-inspection sealed container, a pressure source, and a detector; the pre-inspection sealed container includes a pre-inspection mounting plate and a pre-inspection pressure chamber, the pre-inspection mounting plate is evenly provided with a plurality of pre-inspection mounting holes for mounting valve stems, a pre-inspection connection hole for connecting the pressure source, and a pre-inspection detection hole for mounting the detector; one end of the pre-inspection pressure chamber is sealed, and the other end is provided with a sealing port for connecting to the pre-inspection mounting plate, and a sealing element is provided between the sealing port and the pre-inspection mounting plate; the pressure source is used to pressurize the interior of the pre-inspection sealed container through the pre-inspection connection hole; the detector is used to detect pressure changes inside the pre-inspection sealed container through the pre-inspection detection hole.

[0006] Furthermore, the initial inspection mounting plate is circular, and the initial inspection pressure chamber is cylindrical with rounded corners on its inner side.

[0007] Furthermore, several initial inspection mounting holes are arranged in a ring shape, and initial inspection connection holes and initial inspection detection holes are located in the middle of several initial inspection mounting holes.

[0008] Furthermore, on the initial inspection mounting plate, several screw holes are provided around the initial inspection mounting hole. These screw holes are used to install fastening bolts that connect the initial inspection mounting plate and the initial inspection pressure chamber.

[0009] Furthermore, the sealing element is an O-ring, and the sealing port is provided with a corresponding mounting groove.

[0010] Furthermore, the initial inspection mounting hole is a cylindrical countersunk hole, and the valve stem is fixedly installed through the bottom surface of the initial inspection mounting plate and the stepped surface of the cylindrical countersunk hole.

[0011] Furthermore, it also includes a re-inspection sealed container, a re-inspection mounting plate for the re-inspection sealed container, and a re-inspection pressure chamber, wherein the re-inspection mounting plate is provided with only one re-inspection mounting hole for installing a valve.

[0012] Furthermore, the re-inspection mounting plate is disc-shaped, and it is also provided with re-inspection connection holes and re-inspection detection holes arranged in a triangle with the re-inspection mounting holes.

[0013] Furthermore, the re-inspection connection port is connected to the pressure source and is switched via a switching valve; the re-inspection detection port is connected to a re-inspection detector.

[0014] Furthermore, both the initial inspection pressure chamber and the re-inspection pressure chamber are equipped with safety pressure relief valves.

[0015] Compared with existing technologies, the beneficial effects of this utility model are as follows: This application, through the design of multiple initial inspection mounting holes, enables the simultaneous inspection of multiple valve stems with a single clamping, effectively shortening the inspection cycle and improving inspection efficiency. Furthermore, the initial inspection sealed container of this application can simulate the actual working environment of the valve stems, improving inspection reliability. All valve stems to be tested are placed within the initial inspection sealed container, eliminating test errors that may arise from differences in equipment, operating time, or minor environmental fluctuations during single-piece inspection, thus improving the consistency of product test results. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the sealed container used for initial inspection in an embodiment of this utility model;

[0017] Figure 2 This is a cross-sectional view of the sealed container in the initial inspection of this utility model embodiment;

[0018] Figure 3 This is a schematic diagram of the structure of the re-inspection sealed container in an embodiment of this utility model;

[0019] Figure 4 This is a cross-sectional view of the re-inspection sealed container in an embodiment of this utility model.

[0020] Among them, 1: Initial inspection mounting plate; 2: Initial inspection pressure chamber; 3: Valve nozzle; 4: Initial inspection mounting hole; 5: Initial inspection connection hole; 6: Initial inspection test hole; 7: Seal; 8: Screw hole; 9: Fastening bolt; 10: Re-inspection mounting plate; 11: Re-inspection pressure chamber; 12: Re-inspection mounting hole; 13: Re-inspection connection hole; 14: Re-inspection test hole. Detailed Implementation

[0021] It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0022] 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.

[0023] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly. The connection can be a direct connection or an indirect connection.

[0024] Furthermore, in this utility model, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0025] One embodiment of this utility model provides a valve stem detection component, such as... Figure 1 and Figure 2 As shown, the valve stem detection assembly provided in this embodiment includes: a pre-inspection sealed container, a pressure source, and a detector. Figure 1 The pressure source and detector are not shown. The initial inspection sealed container includes an initial inspection mounting plate 1 and an initial inspection pressure chamber 2. The initial inspection mounting plate 1 has several initial inspection mounting holes 4 for installing valves 3, an initial inspection connection hole 5 for connecting the pressure source, and an initial inspection detection hole 6 for installing the detector. One end of the initial inspection pressure chamber 2 is sealed, and the other end is provided with a sealing port for connecting to the initial inspection mounting plate 1. A sealing element 7 is provided between the sealing port and the initial inspection mounting plate 1. The pressure source is used to pressurize the inside of the initial inspection sealed container through the initial inspection connection hole 5. The detector is used to detect the pressure change inside the initial inspection sealed container through the initial inspection detection hole 6.

[0026] The initial inspection sealed container forms the core testing environment, housing the valve 3 to be tested. It applies pressure to the valve 3 and monitors pressure changes, serving as the "chamber" where the entire testing process takes place. The initial inspection mounting plate 1, acting as the cover of the initial inspection sealed container, facilitates the installation of the valve 3. Evenly distributed initial inspection mounting holes 4 on the plate can be determined based on testing efficiency and requirements. The shape and size of these holes are designed to secure the valve 3, ensuring a tight seal between the valve 3's sealing base and the initial inspection mounting plate 1, while the valve core remains exposed inside the initial inspection pressure chamber 2. The initial inspection detection hole 6 is used to install a detector, which can be a pressure sensor or a barometer. The detector's probe extends into the initial inspection pressure chamber 2 through the detection hole 6, monitoring the gas pressure in the chamber in real time and determining whether the batch of valves 3 meets the requirements based on pressure changes. The initial inspection pressure chamber 2 is a concave cavity located below the initial inspection mounting plate 1, forming a sealed space together with the mounting plate 1. It can be made of pressure-resistant material, such as stainless steel. The sealing port is the part where the edge of the initial inspection pressure chamber 2 connects to the initial inspection mounting plate 1. The design of the sealing port, such as a flange or snap-fit, must ensure that the initial inspection mounting plate 1 is reliably fixed above the initial inspection pressure chamber 2. Preferably, the sealing port is integrally molded with the initial inspection pressure chamber 2. The sealing element 7 is located between the sealing port and the initial inspection mounting plate 1 and can be an O-ring, gasket, or other type of sealing material to prevent gas from escaping through the gap during pressurization, thus avoiding misjudgment. The pressure source provides the compressed gas required for testing. It can be an air pump, which pressurizes the interior of the initial inspection sealed container through the initial inspection connection hole 5, simulating tire pressure, so that the valve 3 actually bears its internal pressure.

[0027] In use, the pressure source pressurizes the initial inspection sealed container to a set value, which is 250 kPa in this embodiment. Then, the pressurization is stopped and the valve is closed. The valve can be set at the output end of the pressure source or at the initial inspection connection hole 5. The detector continuously or at set time intervals reads the pressure value in the initial inspection sealed container. If all valves 3 are well sealed, the pressure value displayed by the detector should remain stable within a specified time. If one or more valves 3 are leaking, the rate and magnitude of the pressure drop displayed by the detector will be greater than the set threshold, which indicates that there is a leak in the valve 3.

[0028] This embodiment can simultaneously install and test multiple valve stems 3, significantly improving testing efficiency and throughput compared to the traditional method of testing them one by one. It is suitable for online or offline batch testing on production lines. Furthermore, by pressurizing the interior of the initial inspection sealed container, it directly simulates the actual working state of the valve stem 3 under air pressure inside the tire, resulting in more realistic and reliable test results.

[0029] In this embodiment, the initial inspection mounting plate 1 is circular, and the initial inspection pressure chamber 2 is cylindrical with rounded corners on its inner side.

[0030] In this embodiment, the initial inspection mounting plate 1 is circular, and the corresponding initial inspection pressure chamber 2 is cylindrical, which ensures uniform pressure distribution inside. The rounded inner corners further detect stress concentration, improving safety and reliability. The circular structure has rotational symmetry, is easy to manufacture and install, and allows for more initial inspection mounting holes 4, improving space utilization.

[0031] In this embodiment, a number of initial inspection mounting holes 4 are arranged in a ring shape, and the initial inspection connection hole 5 and the initial inspection detection hole 6 are located in the middle of the number of initial inspection mounting holes 4.

[0032] In this embodiment, the initial inspection mounting holes 4 are arranged in a ring on the initial inspection mounting plate 1, ensuring symmetry and fully utilizing the radial space of the circular initial inspection mounting plate 1 to increase the number of inspections. The initial inspection connecting holes 5 and the initial inspection detection holes 6 are positioned in the center of the ring-shaped initial inspection mounting holes 4, avoiding waste in the central area and facilitating installation and operation. The pressure at the center point best reflects the overall average pressure state of the entire container, reducing reading deviations caused by different sensor positions and ensuring consistency in the detection standards of the valve stem 3 at different locations.

[0033] In this embodiment, a plurality of screw holes 8 are provided around the initial inspection mounting hole 4 on the initial inspection mounting plate 1. The screw holes 8 are used to install fastening bolts 9 that connect the initial inspection mounting plate 1 and the initial inspection pressure chamber 2.

[0034] Among them, the multiple fastening bolts 9 evenly distributed on the circumference can generate a large and controllable pre-tightening force, ensuring that the sealing element 7 between the initial inspection mounting plate 1 and the sealing port of the initial inspection pressure chamber 2 reaches its design compression rate, forming an effective sealing interface and preventing leakage or failure at the connection.

[0035] In this embodiment, the sealing element 7 is an O-ring, and the sealing port is provided with a corresponding mounting groove.

[0036] In this embodiment, the dimensions of the O-ring and the mounting groove can be optimized based on the design pressure of the initial sealed container. Higher pressure typically requires a larger cross-section O-ring. Preferably, anti-extrusion retaining rings can be installed on both the inner and outer sides of the mounting groove to prevent seal failure.

[0037] In this embodiment, the initial inspection mounting hole 4 is a cylindrical countersunk hole, and the valve stem 3 is fixedly installed through the bottom surface of the initial inspection mounting plate 1 and the stepped surface of the cylindrical countersunk hole.

[0038] The base of valve stem 3 is larger than the diameter of the small hole at the bottom of the countersunk hole. During installation, simply place valve stem 3 through the cylindrical countersunk hole, allowing it to naturally sit on the stepped surface and be secured by the stepped surface for initial positioning. No complex adjustments are required, making the installation process quick. The built-in mounting structure of valve stem 3 secures it tightly between the stepped surface and the bottom surface of the mounting plate, simulating the actual installation scenario of valve stem 3. A sealing interface is formed between the base of valve stem 3 and the stepped surface to prevent leakage of pressurized medium. Preferably, a gasket can be used to protect the stepped surface, improving its service life.

[0039] like Figure 3 and Figure 4 As shown, in this embodiment, it also includes a re-inspection sealed container, a re-inspection mounting plate 10 and a re-inspection pressure chamber 11 for the re-inspection sealed container, and the re-inspection mounting plate 10 is provided with only one re-inspection mounting hole 12 for installing the valve 3.

[0040] The re-inspection sealed container has a structure basically the same as the initial inspection sealed container and is used to re-inspect the valve stems 3 after the initial inspection. When the initial batch inspection of valve stems 3 detects a pressure drop, it is impossible to accurately locate which one or more valve stems 3 are leaking. By using the re-inspection sealed container for one-to-one isolation testing, the unqualified valve stems 3 can be identified, thereby improving the accuracy of the test results. This embodiment achieves maximum efficiency and the best balance between quality, efficiency, and cost through a dual detection strategy of efficient initial screening and precise re-inspection. This application can detect different valve stems 3, and the attached drawings show two different valve stems 3.

[0041] In this embodiment, the re-inspection mounting plate 10 is disc-shaped, and it is also provided with a re-inspection connection hole 13 and a re-inspection detection hole 14 arranged in a triangular shape with the re-inspection mounting hole 12.

[0042] The triangular distribution optimizes the structure of the re-inspection mounting plate 10, ensuring a reasonable distance between the three holes, which facilitates the installation of the valve stem 3 to be re-inspected. This reduces the size of the re-inspection mounting plate 10, shortens the pressurization test time, and improves the test sensitivity.

[0043] In this embodiment, the re-inspection connection hole 13 is connected to a pressure source and is switched by a switching valve; the re-inspection detection hole 14 is connected to a re-inspection detector.

[0044] In this embodiment, the retest and initial test use the same pressure source, avoiding the need for a separate pressure source for the retest, significantly reducing system complexity and cost. The switching valve physically isolates the pressurization pipelines for the initial and retest, completely preventing pressure crosstalk or leakage between the two testing containers and ensuring the purity and accuracy of their respective pressure data. A separate retest detector is used to ensure that the retest is unaffected by the initial test process, initial test pipeline, or the status of the initial test sensor. The initial and retests can operate in parallel without interference, improving overall testing efficiency.

[0045] In this embodiment, both the initial inspection pressure chamber 2 and the re-inspection pressure chamber 11 are equipped with safety pressure relief valves.

[0046] This embodiment includes a safety pressure relief valve. When the control system fails—such as a pressure sensor malfunction, controller malfunction, pressure regulating valve jamming, or human error causing an abnormal pressure rise exceeding the design safety limit—the valve automatically and quickly opens to release pressure, preventing a physical explosion or rupture of the initial inspection pressure chamber 2 and protecting the lives of operators and surrounding equipment. It also prevents irreversible plastic deformation or damage to the initial inspection pressure chamber 2 and its internal structure due to overpressure, avoiding costly equipment damage, subsequent repair and replacement costs, and production downtime losses.

[0047] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural or procedural transformations made based on the content of the present utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present utility model.

Claims

1. A valve stem detection assembly, characterized in that, include: The initial inspection sealed container, pressure source, and detector are provided. The initial inspection sealed container includes an initial inspection mounting plate (1) and an initial inspection pressure chamber (2). The initial inspection mounting plate (1) is evenly provided with a plurality of initial inspection mounting holes (4) for installing valves (3), an initial inspection connection hole (5) for connecting the pressure source, and an initial inspection detection hole (6) for installing the detector. One end of the initial inspection pressure chamber (2) is sealed, and the other end is provided with a sealing port for connecting with the initial inspection mounting plate (1). A sealing element (7) is provided between the sealing port and the initial inspection mounting plate (1). The pressure source is used to pressurize the interior of the initial inspection sealed container through the initial inspection connection hole (5). The detector is used to detect the pressure change inside the initial inspection sealed container through the initial inspection detection hole (6).

2. The valve stem detection assembly according to claim 1, characterized in that, The initial inspection mounting plate (1) is circular, and the initial inspection pressure chamber (2) is cylindrical with rounded corners on its inner side.

3. The valve stem detection assembly according to claim 2, characterized in that, The initial inspection mounting holes (4) are arranged in a ring shape, and the initial inspection connecting hole (5) and the initial inspection detection hole (6) are located in the middle of the initial inspection mounting holes (4).

4. The valve stem detection assembly according to claim 3, characterized in that, On the initial inspection mounting plate (1), a plurality of screw holes (8) are provided around the initial inspection mounting hole (4). The screw holes (8) are used to install fastening bolts (9) that connect the initial inspection mounting plate (1) and the initial inspection pressure chamber (2).

5. The valve stem detection assembly according to claim 2, characterized in that, The sealing element (7) is an O-ring, and the sealing port is provided with a corresponding mounting groove.

6. The valve stem detection assembly according to claim 1, characterized in that, The initial inspection mounting hole (4) is a cylindrical countersunk hole, and the valve (3) is fixedly installed through the bottom surface of the initial inspection mounting plate (1) and the stepped surface of the cylindrical countersunk hole.

7. The valve stem detection assembly according to any one of claims 1-6, characterized in that, It also includes a re-inspection sealed container, a re-inspection mounting plate (10) and a re-inspection pressure chamber (11) of the re-inspection sealed container, and the re-inspection mounting plate (10) is provided with only one re-inspection mounting hole (12) for installing the valve (3).

8. The valve stem detection assembly according to claim 7, characterized in that, The re-inspection mounting plate (10) is disc-shaped, and is provided with a re-inspection connection hole (13) and a re-inspection detection hole (14) arranged in a triangular shape with the re-inspection mounting hole (12).

9. The valve stem detection assembly according to claim 8, characterized in that, The re-inspection connection hole (13) is connected to the pressure source and is switched by a switching valve; the re-inspection detection hole (14) is connected to a re-inspection detector.

10. The valve stem detection assembly according to claim 7, characterized in that, Both the initial inspection pressure chamber (2) and the re-inspection pressure chamber (11) are equipped with safety pressure relief valves.

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