Helium leak detection stainless steel tube assembly

Abstract

The utility model provides a stainless steel pipe assembly for helium leak detection, which relates to the technical field of helium leak detection and comprises a stainless steel corrugated pipe, a first connecting structure and a second connecting structure, the first connecting structure comprises a first buckling-pressing type guide pipe and a first buckling-pressing type nut, and the second connecting structure comprises a second buckling-pressing type guide pipe and a second buckling-pressing type nut. The first buckling and pressing type nut sleeves the outer side of the first buckling and pressing type guide pipe; the second connecting structure comprises a second buckling-pressing type guide pipe and a second buckling-pressing type nut, and the second buckling-pressing type nut is arranged on the outer side of the second buckling-pressing type guide pipe in a sleeving mode. The second buckling and pressing type nut is connected with the quick connector assembly through the elbow external thread direct connector; according to the stainless steel pipe assembly for helium leak detection, the stainless steel corrugated pipe is arranged, stainless steel materials cannot adsorb helium, the situation that due to the fact that a connecting pipeline adsorbs helium, the airtightness of a product is detected mistakenly is avoided, and the authenticity of the airtightness detection result of the product is guaranteed; and the connecting pipeline does not need to be subjected to short-term and regular helium cleaning treatment, and can be put into production and use for a long time.

Description

Technical Field

[0001] The utility model relates to the technical field of helium leak detection, and more specifically to a helium leak detection stainless steel pipe assembly. Background Art

[0002] At present, helium detection is widely used in products that require high air tightness, such as automobiles and aviation. The detection station in the helium detection box is equipped with a detection pipeline to connect the helium detection instrument and the product to be tested. Depending on the shape of the product to be tested, the detection pipeline needs to be flexible and adjustable in angle.

[0003] The existing detection pipelines on the market use PU tubes, which can meet the requirements of flexibility and adjustable angle. However, the connection between the helium detection equipment and the detected product with PU tubes has the disadvantage that PU tubes are easy to absorb helium, resulting in detection distortion. Since PU materials themselves easily absorb helium, when the product leaks, helium fills the vacuum sealing box and adheres to the PU tube. Vacuuming cannot completely remove the helium attached to the PU tube. When the air tightness is tested again, the helium adsorbed on the PU tube will affect the authenticity of the product air tightness test results, causing false detection in actual testing; and in actual production, the PU tube needs to be removed from the machine for helium cleaning after 1-3 weeks of use during the helium detection process, which is not conducive to long-term production use. Utility Model Content

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: to provide a helium leak detection stainless steel pipe assembly, including a stainless steel bellows, a first connecting structure, and a second connecting structure, the first connecting structure and the second connecting structure are respectively arranged at the right end and the left end of the stainless steel bellows; the first connecting structure includes a first buckled catheter and a first buckled nut, the first buckled catheter is fixedly connected to the right end of the stainless steel bellows, and the first buckled nut is sleeved on the outside of the first buckled catheter; the second connecting structure includes a second buckled catheter and a second buckled nut, the second buckled catheter is fixedly connected to the left end of the stainless steel bellows, and the second buckled nut is sleeved on the outside of the second buckled catheter; the second buckled nut is connected to the quick connector assembly through an elbow external thread direct connector.

[0005] Furthermore, a first elastic sealing ring is arranged on the inner side of the first buckled nut, and the first elastic sealing ring is located at the port of the first buckled catheter.

[0006] Furthermore, the outer walls at both ends of the elbow external thread direct connector are respectively provided with a first external thread section and a second external thread section, and one end of the elbow external thread direct connector is threadedly connected to the second buckled nut through the second external thread section; the other end of the elbow external thread direct connector is threadedly connected to the internal thread at the end of the quick connector assembly through the first external thread section.

[0007] Furthermore, a second elastic sealing ring is arranged on the inner side of the second buckled nut, and the second elastic sealing ring is located between the second buckled catheter port and the right side port of the elbow external thread direct connector.

[0008] Furthermore, a third elastic sealing ring is arranged on the inner side of the end of the quick connector assembly; the third elastic sealing ring is located at the upper side port of the elbow external thread direct connector.

[0009] Furthermore, the outer side of the stainless steel corrugated pipe is provided with a stainless steel wire braided sheath.

[0010] Compared with the prior art, the helium leak detection stainless steel pipe assembly of the utility model has the following beneficial effects: the helium leak detection stainless steel pipe assembly of the utility model is provided with a stainless steel bellows, which is used as a connecting pipe to connect the helium detection instrument and the detected product. The stainless steel material will not absorb helium, thereby avoiding the situation where the air tightness of the product is misdetected due to the helium adsorption of the connecting pipe itself, thereby ensuring the authenticity of the air tightness detection result of the product; and there is no need to regularly clean the connecting pipe for a short period of time, so the connecting pipe can be put into production and use for a long time. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0012] Figure 1 It is a structural schematic diagram of the helium leak detection stainless steel pipe assembly of the utility model.

[0013] Figure 2 for Figure 1 Top view of the .

[0014] Figure 3 for Figure 2 AA section view.

[0015] Figure 4 for Figure 3 A local enlarged view of the first connection structure.

[0016] Figure 5 for Figure 3 A partial enlarged view of the connection relationship between the second connection structure and the elbow external thread direct connector and the quick connector assembly.

[0017] Explanation of symbols in the figure:

[0018] 1. Stainless steel bellows; 2. First connection structure; 3. Second connection structure; 4. First buckle-type catheter; 5. First buckle-type nut; 6. First elastic sealing ring; 7. Stainless steel wire braided sheath; 8. Second buckle-type catheter; 9. Second buckle-type nut; 10. Elbow external thread direct connector; 11. Quick connector assembly; 12. Second elastic sealing ring; 13. First external thread section; 14. Second external thread section; 15. Third elastic sealing ring. DETAILED DESCRIPTION

[0019] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. 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.

[0020] The helium leak detection stainless steel pipe assembly provided by the embodiment of the utility model is now described. Figure 1-Figure 3 As shown, a helium leak detection stainless steel pipe assembly includes a stainless steel bellows 1, a first connection structure 2, and a second connection structure 3. The first connection structure 2 and the second connection structure 3 are respectively arranged at the right end and the left end of the stainless steel bellows 1. The stainless steel bellows 1 is connected to the helium detection instrument through the first connection structure 2, and the stainless steel bellows 1 is connected to the quick connector assembly 11 through the second connection structure 3, and the quick connector assembly 11 is connected to the product to be detected.

[0021] The stainless steel bellows 1 has a pipeline flexible bending function. The outer side of the stainless steel bellows 1 is provided with a stainless steel wire braided sheath 7, and the stainless steel wire braided sheath 7 protects the stainless steel bellows 1 from being damaged.

[0022] like Figure 4 As shown, the first connection structure 2 includes a first buckled conduit 4 and a first buckled nut 5. The first buckled conduit 4 is fixedly connected to the right end of the stainless steel bellows 1 by welding to ensure the sealing of the connection between the first buckled conduit 4 and the stainless steel bellows 1. The first buckled nut 5 is rotatably sleeved on the outside of the first buckled conduit 4. A first elastic sealing ring 6 is arranged on the inside of the first buckled nut 5, and the first elastic sealing ring 6 is located at the end of the first buckled conduit 4.

[0023] The first pressing nut 5 is butt-jointed and locked with the helium detection instrument. During the butt-jointing and locking process, the first elastic sealing ring 6 is squeezed to achieve a sealing effect. The helium enters the stainless steel bellows 1 through the first pressing conduit 4.

[0024] like Figure 5As shown, the second connection structure 3 includes a second buckled conduit 8 and a second buckled nut 9. The second buckled conduit 8 is fixedly connected to the left end of the stainless steel bellows 1 by welding to ensure the sealing of the connection between the second buckled conduit 8 and the stainless steel bellows 1. The second buckled nut 9 is rotatably sleeved on the outside of the second buckled conduit 8, and the second buckled nut 9 is connected to the quick connector assembly 11 through an elbow external thread direct connector 10.

[0025] The upper outer wall and the right outer wall of the elbow external thread direct connector 10 are respectively provided with a first external thread section 13 and a second external thread section 14. The right end of the elbow external thread direct connector 10 is threadedly connected to the second buckle nut 9 through the second external thread section 14. A second elastic sealing ring 12 is provided on the inner side of the second buckle nut 9, and the second elastic sealing ring 12 is located between the port of the second buckle catheter 8 and the right side port of the elbow external thread direct connector 10. The threaded connection between the second buckle nut 9 and the elbow external thread direct connector 10 is not completely locked, and the second elastic sealing ring 12 can be squeezed to achieve a sealing effect. Thread glue is applied to the threaded connection position of the second buckle nut 9 and the elbow external thread direct connector 10 so that the second buckle nut 9 and the elbow external thread direct connector 10 are completely fixed, so that the second buckle catheter 8 does not rotate, and the elbow external thread direct connector 10 rotates and does not leak.

[0026] The upper end of the elbow male thread direct connector 10 is threadedly connected to the internal thread of the end of the quick connector assembly 11 through the first external thread section 13. A third elastic sealing ring 15 is provided inside the end of the quick connector assembly 11, and the third elastic sealing ring 15 is located at the upper side port of the elbow male thread direct connector 10. The elbow male thread direct connector 10 and the quick connector assembly 11 are tightened, and the third elastic sealing ring 15 is squeezed to achieve sealing performance, so that helium can pass through the closed channel throughout the whole process.

[0027] The quick connector assembly 11 can match different product connectors through an adapter to achieve the function of quickly switching the model of the product being tested.

[0028] The helium leak detection stainless steel pipe assembly of the utility model is provided with a stainless steel bellows 1, and the stainless steel bellows 1 is used as a connecting pipe to connect the helium detection instrument and the detected product. The stainless steel material will not absorb helium, so the situation of false detection of product air tightness due to the adsorption of helium by the connecting pipe itself is avoided, and the authenticity of the product air tightness detection result is guaranteed; and there is no need to regularly clean the connecting pipe for a short period of time, so it can be put into production and use for a long time.

[0029] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A helium leak detection stainless steel tube assembly, characterized in that: It includes a stainless steel bellows, a first connecting structure and a second connecting structure, and the first connecting structure and the second connecting structure are respectively arranged at the right end and the left end of the stainless steel bellows; the first connecting structure includes a first snap-on catheter and a first snap-on nut, the first snap-on catheter is fixedly connected to the right end of the stainless steel bellows, and the first snap-on nut is sleeved on the outside of the first snap-on catheter; the second connecting structure includes a second snap-on catheter and a second snap-on nut, the second snap-on catheter is fixedly connected to the left end of the stainless steel bellows, and the second snap-on nut is sleeved on the outside of the second snap-on catheter; the second snap-on nut is connected to the quick connector assembly through an elbow external thread direct connector.

2. The helium leak detection stainless steel tube assembly according to claim 1, characterized in that: A first elastic sealing ring is arranged on the inner side of the first buckling nut, and the first elastic sealing ring is located at the port of the first buckling catheter.

3. The helium leak detection stainless steel tube assembly according to claim 2, characterized in that: The outer walls at both ends of the elbow external thread direct connector are respectively provided with a first external thread section and a second external thread section. One end of the elbow external thread direct connector is threadedly connected to the second buckled nut through the second external thread section; the other end of the elbow external thread direct connector is threadedly connected to the internal thread at the end of the quick connector assembly through the first external thread section.

4. The helium leak detection stainless steel tube assembly according to claim 3, characterized in that: A second elastic sealing ring is arranged on the inner side of the second buckled nut, and the second elastic sealing ring is located between the second buckled catheter port and the right side port of the elbow external thread direct connector.

5. The helium leak detection stainless steel tube assembly according to claim 4, characterized in that: A third elastic sealing ring is arranged inside the end of the quick connector assembly; the third elastic sealing ring is located at the upper side port of the elbow external thread direct connector.

6. The helium leak detection stainless steel tube assembly according to claim 5, characterized in that: The outer side of the stainless steel corrugated pipe is covered with a stainless steel wire braided sheath.

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