Vacuum box type helium mass spectrum airtightness detection equipment for hot gas welding parts

Abstract

The utility model discloses a vacuum box type helium mass spectrum airtight detection device for hot gas welding parts, which comprises a welding frame, a helium mass spectrum detection assembly and a helium vacuum detection assembly, the left side of the lower layer of the welding frame is provided with a gas source processing triple piece and an electric control valve terminal, and the upper layer of the rear wall of the welding frame is provided with a debugging window. An electric control box is installed on the lower layer of the rear wall of the welding frame, a helium mass spectrum detection assembly is installed on the left side of the welding frame, and a helium vacuum detection assembly is placed in an inner cavity of the upper layer of the welding frame. The problems that although a common pressure drop detection method at present avoids the contact problem of water detection, the detection precision is limited, the detection requirement of automobile key parts for micro leakage is difficult to meet, in addition, the method is greatly influenced by environment temperature and pressure fluctuation, the stability is poor, and optimization and improvement of the production technology are not facilitated are solved.

Description

Technical Field

[0001] This utility model relates to the field of airtightness testing equipment, specifically to a vacuum chamber-type helium mass spectrometry airtightness testing device for hot gas welded parts. Background Technology

[0002] In the development of automotive lightweighting, welded plastic parts are gradually replacing traditional metal components. These parts, formed using hot gas welding processes, such as air suspension chambers and air dryer canisters, have their airtightness directly affecting the overall vehicle safety performance. However, current airtightness testing technologies in the industry face numerous challenges.

[0003] While the commonly used pressure drop detection method avoids the contact problem of water testing, its detection accuracy is limited and it is difficult to meet the detection requirements of micro-leakage for key automotive components. In addition, this method is greatly affected by fluctuations in ambient temperature and pressure, has poor stability, and is not conducive to the optimization and improvement of production processes.

[0004] To address the aforementioned issues, this application proposes a vacuum chamber-type helium mass spectrometer for gas tightness testing of hot gas welded parts. Utility Model Content

[0005] To address the problems in related technologies, this utility model provides a vacuum chamber-type helium mass spectrometer for gas tightness testing of hot gas welded parts. It can ensure testing accuracy and meet testing requirements, while also significantly reducing operating costs and facilitating the optimization and improvement of production processes.

[0006] Therefore, the specific technical solution adopted by this utility model is as follows:

[0007] A vacuum chamber-type helium mass spectrometry airtightness testing device for hot gas welded parts includes a welding frame, a helium mass spectrometry testing component, and a helium vacuum testing component. A gas source treatment triplet and an electrically controlled valve island are installed on the lower left side of the welding frame. An HMI display is installed on the right end of the front side wall of the welding frame. Protective plates are installed on both the left and right side walls of the welding frame. An adjustment window is installed on the upper rear wall of the welding frame. An electrical control box is installed on the lower rear wall of the welding frame. The helium mass spectrometry testing component is installed on the left side of the welding frame. The helium vacuum testing component is placed in the upper inner cavity of the welding frame.

[0008] As a further embodiment of this utility model, the helium mass spectrometry detection component includes a profile frame, a helium mass spectrometer is placed at the upper end of the profile frame, a high-flow-rate vacuum pump is placed in the inner cavity of the profile frame, and a detector vacuum pump is placed in the inner cavity of the profile frame behind the high-flow-rate vacuum pump.

[0009] As a further embodiment of this utility model, the helium vacuum detection component includes a base plate, a square tube bracket is mounted on the upper end of the base plate, linear guide rail modules are mounted on both sides of the upper end of the square tube bracket, a sliding plate is mounted on the slider of the linear guide rail module, a sliding connector of a sliding rodless cylinder is connected to the bottom end of the sliding plate, the sliding rodless cylinder is disposed on both sides inside the welding frame, and a drag chain is installed between one side wall of the square tube bracket and the welding frame.

[0010] As a further embodiment of this utility model, four lifting cylinders are installed on the upper end of the sliding plate, and the piston rods of the lifting cylinders pass through the sliding plate and are connected to the lifting plate. Guide posts are provided at the four corners of the upper end of the lifting plate, and the upper ends of the guide posts pass through the sliding plate and are connected to the connecting limiting plate. The connecting limiting plate is equipped with a backstop positioning component for limiting the lifting plate. The other end of the backstop positioning component passes through the sliding plate and is connected to the lifting plate. A backstop positioning cylinder that cooperates with the backstop positioning component is installed on the upper end of the sliding plate.

[0011] As a further embodiment of this utility model, an upper sealing cylinder is installed at the upper middle part of the lifting plate, the piston rod of the upper sealing cylinder passes downward through the lifting plate and is connected to an upper sealing fixture, and a vacuum box device is provided below the lifting plate.

[0012] As a further embodiment of this utility model, the vacuum chamber device includes a base plate, a vacuum chamber body is installed on the upper end of the base plate, a product detection sensor is also installed on the upper end of the base plate on the outer side of the vacuum chamber body, a side sealing mechanism is installed on the front side wall of the vacuum chamber body, and a plurality of vacuum connectors are installed on the rear side wall of the vacuum chamber body.

[0013] As a further embodiment of this utility model, casters are installed at the four corners of the bottom end of the welding frame.

[0014] The beneficial effects of this utility model are as follows:

[0015] This invention employs an innovative sealing structure suitable for fully automated production, ensuring testing accuracy and meeting testing requirements while significantly reducing operating costs. Furthermore, its rapid testing characteristics are adapted to the needs of modern production lines, providing a reliable solution for quality control of lightweight plastic automotive parts and facilitating the optimization and improvement of production processes. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure of a vacuum box-type helium mass spectrometer for gas-welded parts according to an embodiment of the present utility model.

[0018] Figure 2 This is a schematic diagram of the helium mass spectrometry detection component of a vacuum box-type helium mass spectrometry airtightness detection device for hot gas welded parts, according to an embodiment of the present utility model.

[0019] Figure 3 This is a schematic diagram of the vacuum pump of a vacuum box-type helium mass spectrometer for gas tightness testing of hot gas welded parts, according to an embodiment of the present utility model.

[0020] Figure 4 This is a schematic diagram of a partial helium vacuum detection component structure of a vacuum box-type helium mass spectrometer for gas-welded parts according to an embodiment of the present utility model.

[0021] Figure 5 This is a schematic diagram of a sliding rodless cylinder for a vacuum box-type helium mass spectrometer gas tightness detection device for hot gas welded parts, according to an embodiment of the present utility model.

[0022] Figure 6 This is a schematic diagram of a vacuum chamber device for a vacuum chamber type helium mass spectrometer for gas tightness testing of hot gas welded parts, according to an embodiment of the present utility model.

[0023] Figure 7 This is a schematic diagram of the rear wall of the vacuum chamber and the vacuum connector of a vacuum chamber-type helium mass spectrometer for gas-welded parts according to an embodiment of the present utility model.

[0024] Figure 8 This is a schematic diagram of the debugging window and electrical control box of a vacuum box-type helium mass spectrometer for gas-welded parts, according to an embodiment of the present invention.

[0025] In the picture:

[0026] 1. Welded frame; 2. Helium mass spectrometry detection assembly; 21. Profile frame; 22. Helium mass spectrometer; 23. High-flow-rate vacuum pump; 24. Detector vacuum pump; 3. Helium vacuum detection assembly; 31. Base plate; 32. Square tube support; 33. Linear guide rail module; 34. Sliding plate; 35. Sliding rodless cylinder; 36. Cable chain; 37. Lifting cylinder; 38. Lifting plate; 39. Guide column; 310. Connecting limit plate; 311. 312. Anti-reverse positioning component; 313. Anti-reverse positioning cylinder; 314. Upper sealing cylinder; 315. Upper sealing fixture; 316. Vacuum chamber device; 3151. Base plate; 3152. Vacuum chamber body; 3153. Product detection sensor; 3154. Side sealing mechanism; 3155. Vacuum connector; 4. Gas source treatment triple unit; 5. Electrically controlled valve island; 6. HMI display; 7. Protection board; 8. Debugging window; 9. Electrical control box; 10. Casters. Detailed Implementation

[0027] To further illustrate the various embodiments, the present invention provides accompanying drawings, which are part of the disclosure of the present invention. These drawings are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, those skilled in the art should be able to understand other possible implementation methods and the advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are usually used to represent similar components.

[0028] According to an embodiment of the present invention, a vacuum chamber-type helium mass spectrometry gas tightness testing device for hot gas welded parts is provided.

[0029] Please refer to the instruction manual appendix. Figure 1-8 A vacuum chamber-type helium mass spectrometry airtightness testing device for hot gas welded parts, according to an embodiment of the present invention, includes a welding frame 1, a helium mass spectrometry testing component 2, and a helium vacuum testing component 3. A gas source treatment triplet 4 and an electronically controlled valve island 5 are installed on the lower left side of the welding frame 1. An HMI display 6 is installed on the right end of the front side wall of the welding frame 1. Protective plates 7 are installed on both the left and right side walls of the welding frame 1. An adjustment window 8 is installed on the upper rear wall of the welding frame 1. An electronic control box 9 is installed on the lower rear wall of the welding frame 1. The helium mass spectrometry testing component 2 is installed on the left side of the welding frame 1. The helium vacuum testing component 3 is placed in the upper inner cavity of the welding frame 1. Casters 10 are installed at the four corners of the bottom of the welding frame 1. By adopting an innovative sealing structure suitable for fully automated production, it ensures testing accuracy, meets testing requirements, significantly reduces operating costs, and its rapid testing characteristics adapt to the needs of modern production lines. It provides a reliable solution for the quality control of lightweight plastic automotive parts and is beneficial for optimizing and improving production processes.

[0030] In one embodiment, please refer to the appendix to the specification. Figure 1 , Figure 2 , Figure 3 and Figure 8 As a further embodiment of this invention, the helium mass spectrometry detection component 2 includes a profile frame 21, with a helium mass spectrometer 22 placed at the upper end of the profile frame 21. A high-flow-rate vacuum pump 23 is placed inside the profile frame 21, and a detector vacuum pump 24 is placed inside the profile frame 21 behind the high-flow-rate vacuum pump 23. In use, the high-flow-rate vacuum pump 23 operates, rapidly extracting air from the inside of the two vacuum chambers 3152 through the vacuum connector 3155 on the vacuum chamber 3152.

[0031] In one embodiment, please refer to the appendix to the specification. Figure 1 , Figure 4 , Figure 5 , Figure 6 and Figure 7As a further embodiment of this utility model, the helium vacuum detection component 3 includes a base plate 31. A square tube bracket 32 ​​is mounted on the upper end of the base plate 31. Linear guide rail modules 33 are mounted on both sides of the upper end of the square tube bracket 32. A sliding plate 34 is mounted on the slider of the linear guide rail module 33. A sliding connector of a sliding rodless cylinder 35 is connected to the bottom end of the sliding plate 34. The sliding rodless cylinder 35 is disposed on both sides inside the welding frame 1. A drag chain 36 is installed between one side wall of the square tube bracket 32 ​​and the welding frame 1. Four lifting cylinders 37 are mounted on the upper end of the sliding plate 34. The piston rod of the lifting cylinder 37 passes through the sliding plate 34 and is connected to a lifting plate 38. Guide posts 39 are provided at the four corners of the upper end of the lifting plate 38. The upper ends of the guide posts 39 pass through the sliding plate 34 and are connected to a connecting limiting plate 310. A device for limiting the lifting is installed on the connecting limiting plate 310. The lowering plate 38 has a backstop positioning component 311. The other end of the backstop positioning component 311 passes through the sliding plate 34 and is connected to the lifting plate 38. The upper end of the sliding plate 34 is equipped with a backstop positioning cylinder 312 that cooperates with the backstop positioning component 311. The upper middle part of the lifting plate 38 is equipped with an upper sealing cylinder 313. The piston rod of the upper sealing cylinder 313 passes downward through the lifting plate 38 and is connected to an upper sealing fixture 314. A vacuum chamber device 315 is provided below the lifting plate 38. The vacuum chamber device 315 includes a base plate 3151. A vacuum chamber body 3152 is installed on the upper end of the base plate 3151. A product detection sensor 3153 is also installed on the upper end of the base plate 3151 on the outside of the vacuum chamber body 3152. A side sealing mechanism 3154 is installed on the front side wall of the vacuum chamber body 3152. Several vacuum connectors 3155 are installed on the rear side wall of the vacuum chamber body 3152.When the product detection sensor 3153 detects a product inside the vacuum chamber 3152, the sliding rodless cylinder 35 drives all mechanisms on the sliding plate 34 to move to the front. Then, the lifting cylinder 37 drives the lifting plate 38 and the upper sealing fixture 314 to descend, causing the sealing ring on the lifting plate 38 to press against the vacuum chamber 3152, forming a seal. Next, the upper sealing cylinder 313 descends, causing the upper sealing fixture 314 to seal the top opening of the product. Due to the downward pressure of the cylinder, the bottom opening of the product is also compressed and sealed. Then, the anti-reverse positioning cylinder 312 extends and engages with the anti-reverse positioning component 311, ensuring that the upper sealing fixture 314 will not be pushed back by the air pressure reaction during the inflation test. Then, the side sealing mechanism 3154 extends, sealing the side opening of the product. At this point, all openings of the product are completely sealed. The product's inner cavity is connected to the helium inlet via a hose, and the product is encased inside the vacuum chamber 3152. Then, the high-flow vacuum pump 23 starts, passing through the vacuum chamber... The vacuum connector 3155 on body 3152 quickly extracts the air from the two vacuum chambers 3152. Then, when the Pirani vacuum gauge installed on the vacuum chamber 3152 through the vacuum connector 3155 detects that the vacuum degree has reached the target value, the helium mass spectrometer 22 is activated to start filling the product with helium. When the helium in the product reaches a certain pressure, the filling stops. The detection port of the helium mass spectrometer 22 is connected to the vacuum chamber 3152 through a pipe. At this time, the helium mass spectrometer 22 detects the helium ion content in the vacuum chamber. After the detection is completed, each vacuum chamber 3152 is equipped with a vacuum breaking valve installed through the vacuum connector 3155 to release the vacuum degree. Then, they are reset in sequence: the side sealing mechanism 3154 retracts to the front, the upper sealing cylinder 313 retracts to the top, the stop positioning cylinder 312 retracts, the unlocking lifting cylinder 37 retracts to the top, and the sliding rodless cylinder 35 drives all mechanisms to retract to the rear, so that the product can be taken out.

[0032] Workflow: Initially, the lifting plate 38 and the upper sealing fixture 314 below it remain on the upper side, and all mechanisms below the sliding plate 34 remain on the rear side under the drive of the sliding rodless cylinder 35, ensuring that there are no obstructions above the vacuum chamber 3152. Then, the external robotic arm will transport the product to be tested into the vacuum chamber 3152, with one product to be tested placed in each vacuum chamber 3152. When the product detection sensor 3153 detects the presence of a product in the vacuum chamber 3152, the sliding rodless cylinder 35 drives all mechanisms on the sliding plate 34 to move to the front side. Subsequently, the lifting cylinder 37 drives the lifting plate 38 and the upper sealing fixture 314 to move to the rear side. The sealing fixture 314 descends, causing the sealing ring on the lifting plate 38 to press against the vacuum chamber 3152, forming a seal. Then, the upper sealing cylinder 313 descends, causing the upper sealing fixture 314 to seal the top opening of the product. Due to the downward pressure of the cylinder, the bottom opening of the product is also compressed and sealed. Subsequently, the anti-reverse positioning cylinder 312 extends and engages with the anti-reverse positioning component 311, ensuring that the upper sealing fixture 314 will not be pushed back by the air pressure reaction during the inflation test. Then, the side sealing mechanism 3154 extends, sealing the side opening of the product. At this point, all openings of the product are completely sealed. The inner cavity of the product is connected to the helium inlet through a hose. The product is encased in a vacuum chamber 3152. A high-flow-rate vacuum pump 23 is then activated, rapidly extracting air from both vacuum chambers 3152 via vacuum connectors 3155. When the Pirani vacuum gauge installed on the vacuum chamber 3152 detects that the vacuum level has reached the target value, the helium mass spectrometer 22 is activated to begin filling the product with helium. Once the helium reaches a certain pressure, the filling stops. The detection port of the helium mass spectrometer 22 is connected to the vacuum chamber 3152 via a pipe, and the helium mass spectrometer 22 then detects the helium ion content within the vacuum chamber. After the test is completed, each vacuum chamber 3152 is equipped with a vacuum breaker valve via a vacuum connector 3155 to release the vacuum. Then, they are reset in sequence: the side sealing mechanism 3154 retracts to the front, the upper sealing cylinder 313 retracts to the top, the backstop positioning cylinder 312 retracts, the unlocking lifting cylinder 37 retracts to the top, and the sliding rodless cylinder 35 drives all mechanisms to retract to the rear, so that the product can be taken out. Then, a large amount of nitrogen gas is blown into the vacuum chamber 3152 through the vacuum connector 3155 outside the vacuum chamber 3152 to disperse the helium gas used for testing. After completion, a new test cycle can be started.

[0033] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A vacuum chamber-type helium mass spectrometry gas tightness detection device for hot gas welded parts, comprising a welding frame (1), a helium mass spectrometry detection component (2), and a helium vacuum detection component (3), characterized in that: A gas source treatment triplet (4) and an electric control valve island (5) are installed on the lower left side of the welding frame (1). An HMI display (6) is installed on the right end of the front side wall of the welding frame (1). Protective plates (7) are installed on both the left and right side walls of the welding frame (1). An debugging window (8) is installed on the upper rear wall of the welding frame (1). An electric control box (9) is installed on the lower rear wall of the welding frame (1). A helium mass spectrometry detection component (2) is installed on the left side of the welding frame (1). A helium vacuum detection component (3) is placed in the upper inner cavity of the welding frame (1).

2. The vacuum chamber-type helium mass spectrometry gas tightness testing device for hot gas welded parts according to claim 1, characterized in that: The helium mass spectrometry detection component (2) includes a profile frame (21), a helium mass spectrometer (22) is placed at the upper end of the profile frame (21), a high-flow vacuum pump (23) is placed in the inner cavity of the profile frame (21), and a detector vacuum pump (24) is placed in the inner cavity of the profile frame (21) behind the high-flow vacuum pump (23).

3. The vacuum chamber-type helium mass spectrometry gas tightness testing device for hot gas welded parts according to claim 1, characterized in that: The helium vacuum detection component (3) includes a base plate (31), a square tube bracket (32) is installed on the upper end of the base plate (31), and linear guide rail modules (33) are installed on both sides of the upper end of the square tube bracket (32). A sliding plate (34) is installed on the slider of the linear guide rail module (33), and a sliding connector of a sliding rodless cylinder (35) is connected to the bottom end of the sliding plate (34). The sliding rodless cylinder (35) is set on both sides inside the welding frame (1), and a drag chain (36) is installed between one side wall of the square tube bracket (32) and the welding frame (1).

4. The vacuum chamber-type helium mass spectrometry gas tightness testing device for hot gas welded parts according to claim 3, characterized in that: Four lifting cylinders (37) are installed on the upper end of the sliding plate (34), and the piston rod of the lifting cylinder (37) passes through the sliding plate (34) and is connected to the lifting plate (38). The four corners of the upper end of the lifting plate (38) are provided with guide posts (39), and the upper end of the guide posts (39) passes through the sliding plate (34) and is connected to the connecting limiting plate (310). The connecting limiting plate (310) is equipped with a backstop positioning component (311) for limiting the lifting plate (38). The other end of the backstop positioning component (311) passes through the sliding plate (34) and is connected to the lifting plate (38). The upper end of the sliding plate (34) is equipped with a backstop positioning cylinder (312) that cooperates with the backstop positioning component (311).

5. A vacuum chamber-type helium mass spectrometry gas tightness testing device for hot gas welded parts according to claim 4, characterized in that: An upper sealing cylinder (313) is installed at the upper middle part of the lifting plate (38). The piston rod of the upper sealing cylinder (313) passes down through the lifting plate (38) and is connected to an upper sealing fixture (314). A vacuum box device (315) is provided below the lifting plate (38).

6. A vacuum chamber-type helium mass spectrometer for gas tightness testing of hot gas welded parts according to claim 5, characterized in that: The vacuum chamber device (315) includes a base plate (3151), a vacuum chamber body (3152) is installed on the upper end of the base plate (3151), a product detection sensor (3153) is also installed on the upper end of the base plate (3151) outside the vacuum chamber body (3152), a side sealing mechanism (3154) is installed on the front side wall of the vacuum chamber body (3152), and a number of vacuum connectors (3155) are installed on the rear side wall of the vacuum chamber body (3152).

7. A vacuum chamber-type helium mass spectrometry gas tightness testing device for hot gas welded parts according to claim 1, characterized in that: Casters (10) are installed at the four corners of the bottom end of the welded frame (1).

Images