Pipe orifice plugging mechanism for helium sealing detection
By designing a helium sealing tube port sealing mechanism including a base, sealed compression chamber and top rod, the problem of lax sealing of the pipe port in helium detection is solved, the detection accuracy and efficiency are improved, and the Operating cost.
Patent Information
- Application Number
- CN202420649558.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-01
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2034-04-01
AI Technical Summary
The existing helium sealing design for testing the pipe port is difficult to ensure sealing, resulting in low detection accuracy, poor efficiency and stability, and high manual operation costs.
A helium sealing mechanism for testing tube mouth sealing including a base, a sealed compression chamber and a top rod is designed. The sealing is achieved using a silicone ring and an O-ring, and combined with automated cylinder drive, ensuring the sealing of the tube mouth.
Fast and stable pipe port sealing is achieved, the accuracy and efficiency of helium detection is improved, and personnel costs are reduced.
Smart Images
Figure CN222255572U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of component detection, and in particular relates to a pipe opening blocking mechanism for helium sealing detection. Background Art
[0002] Urea tank is a urea storage tank, also known as a urea box, which contains urea solution and is mainly used in trucks and buses. Its function is to reduce the harmful gas NO in the car. X When the vehicle exhaust passes through the urea tank, the emission reaches the National IV standard. Urea tanks need to be tested for air tightness before leaving the factory. The existing ordinary air tightness test is generally carried out by filling the internal cavity of the product with air at a certain pressure, and then individually sealing each pipe opening of the product, and then performing an exhaust test. During this period, the air tightness tester determines the gas pressure at each stage. However, this air tightness test has low accuracy and can only be applied to products with low requirements, usually for end face sealing. For products with high requirements, this air tightness test cannot detect micro leaks well.
[0003] Helium detection has high accuracy and helium has high dispersibility. It can quickly diffuse around the leak, making it easy to quickly find leaks. Secondly, helium is a harmless and stable gas that is safe and harmless to the environment and human body. Therefore, it is used for airtight detection of high-demand products. However, since helium detection requires vacuuming the product, switching the pipeline, and filling the product with helium, there are certain requirements for the pipe sealing design of helium detection. The existing method usually relies on manual docking of the pipe joints, but because the strength of the pipe joint is not easy to control, it is easy to have loose sealing, resulting in leakage alarms during the test. This method not only has high personnel costs, but also low efficiency and low detection stability. Therefore, how to efficiently solve the pipe sealing problem encountered during nitrogen detection has become a technical problem that needs to be solved at present. Utility Model Content
[0004] The utility model provides a pipe opening blocking mechanism for helium sealing detection, which can quickly and stably seal the pipe opening of a product to be detected, and the operation is convenient and effective.
[0005] The purpose of the utility model is achieved through the following technical solutions:
[0006] A pipe orifice sealing mechanism for helium sealing detection comprises a base, wherein the base is provided with an entrance for a detection tube to enter, and one side of the base is provided with a first interface and a second interface for gas to flow through, wherein the first interface is connected to a sealed compression chamber in the base; and the sealed compression chamber is provided at the entrance side of the base.
[0007] Preferably, the sealed compression chamber comprises a silicone ring arranged on the inner ring of the inlet and concentric with the inlet, and O-rings are arranged at both ends of the silicone ring.
[0008] Preferably, a gap is provided between the outer wall of the silicone ring and the inner wall of the base.
[0009] Preferably, a push rod is arranged in the base, one end of the push rod is detachably placed in the base, and the other end of the push rod extends out of the base through the entrance.
[0010] Preferably, the second interface is communicated with the sealing detection cavity in the base, and the sealing detection cavity is a main body cavity arranged in the base, and the ejector rod is placed in the main body cavity.
[0011] Preferably, the caliber of the inlet is larger than the caliber of the tube mouth of the product to be detected.
[0012] Preferably, the first interface and the second interface are connected to external devices respectively.
[0013] The beneficial effect of the utility model is embodied in that the blocking mechanism in the utility model can quickly and effectively seal the pipe opening of the product to be detected, thereby better performing helium detection and indirectly improving the detection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0015] Figure 1 : A three-dimensional structural diagram of the utility model.
[0016] Figure 2 : Schematic diagram of the cross-sectional structure of the utility model. DETAILED DESCRIPTION
[0017] The utility model proposes a pipe opening plugging mechanism for helium sealing detection. In order to make the purpose, technical solution and advantages of the utility model clearer, the following is combined with the attached Figure 1-Figure 2 It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.
[0018] A pipe orifice plugging mechanism for helium sealing detection includes a base 1, the base 1 is provided with an entrance for the detection tube to enter, and the caliber of the entrance is larger than the caliber of the pipe orifice of the product to be detected. A main body cavity is provided in the base along the axial direction of the inlet, and the main body cavity is a sealing detection cavity 11. A sealing compression cavity is also provided in the base 1, and the sealing compression cavity is provided in the radial direction of the inlet. The sealing compression cavity includes a silicone ring 5 provided on the inner ring of the inlet and concentric with the inlet, and both ends of the silicone ring 5 are pressed on the inner side of the base, and both ends are provided with O-rings 6. A gap is provided between the outer wall of the silicone ring 5 and the inner wall of the base. The gap is connected to a first interface, and the first interface is connected to an external inflatable device through a connector 3, and air is taken in through the connector 3 to deform the compressed silicone ring 5 inwardly. A second interface is also provided on one side of the base 1, and the second interface is connected to the sealing detection cavity in the base. The second interface is connected to an external air intake / exhaust device through a vent pipe 2.
[0019] As a preferred embodiment, under the same structure as above, a push rod 4 is detachably provided in the base. Specifically, one end of the push rod 4 is detachably placed in the base 1, and the other end extends out of the base 1 from the entrance. The push rod 4 is used to abut against a valve in some products to be tested, and is used to hold the valve, so as to open the nozzle of the test product for easy testing.
[0020] In order to better cooperate with the detection and realize automation, the base 1 can be connected to a cylinder, and the cylinder drives the overall movement of the blocking mechanism to reach the desired position.
[0021] In order to better understand the present invention, the following is an explanation of the use of the present invention:
[0022] During the test, the nozzle of the product to be tested will enter from the entrance, and the valve will be opened through the push rod 4. The inflation device at the first interface will work to inflate the sealing compression chamber, which will drive the silicone ring 5 to hold the outer ring of the product nozzle tightly, thus achieving the seal between the product nozzle and the base. The device at the second interface will first extract the original gas in the product to be tested, and after it is completely extracted, the device switch will be switched to allow helium to enter, so as to perform the product sealing test.
[0023] Finally, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside" and the like that appear in the text indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. The above embodiments are only used to illustrate the technical solutions of the utility model, not to limit it; although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some of the technical features therein with equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the utility model.
Claims
1. A pipe opening plugging mechanism for helium sealing detection, characterized in that: It includes a base, which is provided with an entrance for the detection tube to enter, and one side of the base is provided with a first interface and a second interface for gas to flow through, the first interface is connected to the sealed compression chamber in the base; the sealed compression chamber is arranged on the entrance side of the base.
2. The pipe opening sealing mechanism for helium sealing detection according to claim 1, characterized in that: The sealed compression chamber comprises a silicone ring which is arranged on the inner ring of the inlet and is concentric with the inlet, and O-rings are arranged at both ends of the silicone ring.
3. The pipe opening sealing mechanism for helium sealing detection according to claim 2, characterized in that: A gap is arranged between the outer wall of the silicone ring and the inner wall of the base.
4. The pipe opening sealing mechanism for helium sealing detection according to claim 1, characterized in that: A push rod is arranged in the base, one end of the push rod is detachably placed in the base, and the other end of the push rod extends out of the base through the entrance.
5. The pipe opening sealing mechanism for helium sealing detection according to claim 1, characterized in that: The second interface is communicated with the sealing detection cavity in the base. The sealing detection cavity is a main body cavity arranged in the base, and the ejector rod is placed in the main body cavity.
6. The pipe opening sealing mechanism for helium sealing detection according to claim 1, characterized in that: The caliber of the inlet is larger than the caliber of the pipe opening of the product to be detected.
7. The pipe opening sealing mechanism for helium sealing detection according to claim 1, characterized in that: The first interface and the second interface are connected to external devices respectively.