Vacuum box structure capable of being rapidly replaced and vacuum box helium leak detection system

Abstract

The utility model provides a vacuum box structure capable of being rapidly replaced and a vacuum box helium leak detection system. The vacuum box structure capable of being rapidly replaced comprises a base, a vacuum box, a door plate and a locking structure. The vacuum box is provided with a cavity matched with a workpiece in size, and the door plate seals the cavity of the vacuum box, so that the vacuum box and the door plate surround to form a leak detection space; the vacuum box is detachably arranged on the base through the locking structure, a first positioning structure is arranged on the vacuum box, and a second positioning structure matched with the first positioning structure in a positioning mode is arranged on the base. Compared with the prior art, the vacuum box and the door plate corresponding to different workpiece sizes can be conveniently replaced through the rapid replacement and positioning structure, so that the size of the leak detection space is matched with the workpiece needing leak detection, the net space of the leak detection space is kept in a small size as much as possible, the detection efficiency is improved, and the detection time is shortened.

Description

Technical Field

[0001] The utility model relates to the technical field of vacuum leak detection, in particular to a vacuum chamber structure that can be quickly replaced and a vacuum chamber helium leak detection system. Background Art

[0002] In the structural design of common vacuum chamber helium leak detection systems on the market, usually the vacuum chamber is fixedly installed on the frame and cannot be replaced. If the sizes of the workpieces to be inspected vary greatly, after a smaller workpiece is placed into the vacuum chamber, the net space inside the vacuum chamber is relatively large, resulting in a longer evacuation and leak detection time for the vacuum chamber, and increasing the time of the entire detection cycle. Summary of the Utility Model

[0003] The purpose of the utility model is to overcome the deficiencies in the prior art and provide a vacuum chamber structure that can be quickly replaced and a vacuum chamber helium leak detection system.

[0004] An embodiment of the utility model provides a vacuum chamber structure that can be quickly replaced, including: a base, a vacuum chamber, a door panel, and a locking structure;

[0005] The vacuum chamber has a cavity adapted to the size of the workpiece. A workpiece fixture and a fixture connection pipe are installed in the cavity. The workpiece fixture is used to seal the interface of the workpiece. The fixture connection pipe is connected to the workpiece fixture. The door panel seals the cavity of the vacuum chamber so that a leak detection space is formed around the vacuum chamber and the door panel.

[0006] The vacuum chamber is detachably arranged on the base through the locking structure. A first positioning structure is arranged on the vacuum chamber, and a second positioning structure that is in positioning cooperation with the first positioning structure is arranged on the base.

[0007] In some optional embodiments, an installation plate is arranged at the bottom of the vacuum chamber. Two support bosses are arranged on the base. The installation plate is detachably installed on the two support bosses through the locking structure.

[0008] In some optional embodiments, the first positioning structure includes a plurality of positioning holes arranged on the base. The second positioning structure includes a plurality of positioning columns respectively and evenly arranged on both sides of the vacuum chamber. The positioning columns are in positioning cooperation with the positioning holes correspondingly.

[0009] In some optional embodiments, the top end of the positioning column gradually shrinks in the direction away from the base.

[0010] In some alternative embodiments, a number of first positioning plates and a number of second positioning plates are respectively arranged on two sides of the base, the vacuum chamber is arranged between the first positioning plates and the second positioning plates, and the first positioning plates and the second positioning plates abut against the side portions of the vacuum chamber to limit the position of the vacuum chamber.

[0011] In some alternative embodiments, inclined portions are formed on the sides of the first positioning plate and the second positioning plate facing each other, and the inclined portions of the first positioning plate and the inclined portions of the second positioning plate gradually move away from each other in the direction away from the base.

[0012] In some alternative embodiments, a number of limiting blocks are arranged on the base, the limiting blocks are located between the first positioning plates and the second positioning plates, and the side portions of the vacuum chamber abut against the limiting blocks.

[0013] In some alternative embodiments, the locking structure includes a plurality of fixing screws, the plurality of fixing screws are respectively and uniformly arranged on two sides of the vacuum chamber, and the fixing screws are sequentially connected to the vacuum chamber and the base to lock the vacuum chamber on the base.

[0014] In some alternative embodiments, a plurality of strip-shaped position adjustment slots are respectively arranged on two sides of the vacuum chamber;

[0015] A plurality of mounting holes are arranged on the base, and the fixing screws pass through the position adjustment slots and then are in threaded cooperation with the mounting holes.

[0016] Another embodiment of the present invention provides a vacuum chamber helium leak detection system, including: a quickly replaceable vacuum chamber structure as described above.

[0017] Compared with the prior art, the present invention can conveniently replace the vacuum chamber and the door panel corresponding to different workpiece sizes through the quick replacement and positioning structure, so that the size of the leak detection space is adapted to the workpiece to be leak-detected, thereby facilitating the net space of the leak detection space to be kept as small as possible, shortening the detection time, improving the detection efficiency, and can be used for leak detection of battery cold plates or other suitable components.

[0018] In order to more clearly understand the present invention, the specific embodiments of the present invention will be described below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 Schematic diagram of a quickly replaceable vacuum chamber structure according to an embodiment of the present invention;

[0020] Figure 2 Exploded view of a quickly replaceable vacuum chamber structure according to an embodiment of the present invention;

[0021] Figure 3 This is a schematic structural view of a vacuum chamber according to an embodiment of the present utility model.

[0022] Explanation of reference numerals in the drawings:

[0023] 10. Base; 11. Second positioning structure; 12. Support boss; 13. Second positioning plate; 14. Second positioning plate; 141. Tilted portion; 15. Limit block; 16. Mounting hole; 20. Vacuum chamber; 21. Cavity; 22. Workpiece fixture; 23. Fixture connection pipe; 24. First positioning structure; 25. Mounting plate; 26. Position adjustment slot; 30. Locking structure; 31. Fixing screw; 40. Workpiece. Detailed implementation manners

[0024] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are only a part rather than all of the embodiments of the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model. In the description of the present utility model, unless otherwise stated, "a plurality of" means two or more, and "several" means one or more. In addition, unless otherwise stated, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features.

[0025] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation to the present utility model.

[0026] In the description of the present utility model, unless otherwise clearly specified and limited, the terms "installation", "connection", "connection", "fixation" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0027] In the description of the present utility model, the description referring to terms such as "one embodiment", "some alternative embodiments" or "some alternative examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0028] Please refer to Figure 1 and Figure 2 A vacuum chamber structure that can be quickly replaced according to an embodiment of the present utility model includes: a base 10, a vacuum chamber 20, a door panel (not shown in the figure), and a locking structure 30.

[0029] The vacuum chamber 20 has a cavity 21 adapted to the size of the workpiece 40. A workpiece fixture 22 and a fixture connection pipe 23 are installed in the cavity 21. The workpiece fixture 22 is used to seal the interface of the workpiece 40. The fixture connection pipe 23 is connected to the workpiece fixture 22. The door panel seals the cavity 21 of the vacuum chamber 20, so that a leak detection space is formed around the vacuum chamber 20 and the door panel. After the workpiece is placed into the cavity 21, the door panel presses the workpiece tightly in the cavity 21 of the vacuum chamber 20. The fixture connection pipe 23 is communicated with a leak detection gas source, and the leak detection gas sequentially passes through the fixture connection pipe 23 and the workpiece fixture 22, and then is filled into the workpiece 40. A connection head is provided on the workpiece fixture 22, and the connection head is connected to the hole position on the workpiece 40, so as to facilitate evacuating or filling the leak detection gas into the workpiece 40 through the connection head. In the present utility model, the leak detection gas is described by taking helium as an example.

[0030] The vacuum chamber 20 is detachably arranged on the base 10 through the locking structure 30. A first positioning structure 24 is provided on the vacuum chamber 20, and a second positioning structure 11 that is positioned and matched with the first positioning structure 24 is provided on the base 10. A vacuum chamber structure that can be quickly replaced according to the present utility model can replace the vacuum chamber 20 with different-sized cavities by disassembling and replacing the vacuum chamber 20, and the size of the door panel can also be replaced according to the size of the vacuum chamber 20, so that the size of the leak detection space is adapted to the workpiece 40 that needs to be leak-detected, thereby facilitating keeping the net space of the leak detection space as small as possible. The net space is the space between the inner wall of the leak detection space and the outer side of the workpiece 40 after the workpiece 40 is placed into the leak detection space. The smaller the net space, the shorter the evacuation and leak detection time, and thus the detection time is shortened and the detection efficiency is improved.

[0031] In some alternative embodiments, a mounting plate 25 is provided at the bottom of the vacuum chamber 20, and two support bosses 12 are provided on the base 10. The mounting plate 25 is detachably mounted on the two support bosses 12 through a locking structure 30, which provides a certain space between the base 10 and the vacuum chamber 20, facilitating the arrangement of other structures on the base 10.

[0032] Please refer to Figure 3 , in some alternative embodiments, the first positioning structure 24 includes a plurality of positioning holes provided on the base 10, and the second positioning structure 11 includes a plurality of positioning posts respectively and uniformly provided on both sides of the vacuum chamber 20. The positioning posts are in positioning cooperation with the positioning holes correspondingly. Before the vacuum chamber 20 is mounted on the base 10 through the locking structure 30, the positioning cooperation between the positioning posts and the positioning holes makes it difficult for the vacuum chamber 20 and the base 10 to shake relative to each other.

[0033] In some alternative embodiments, the top ends of the positioning posts gradually narrow in the direction away from the base 10, thereby facilitating the guiding of the positioning posts into the positioning holes.

[0034] In some alternative embodiments, a number of first positioning plates 13 and a number of second positioning plates 14 are respectively provided on both sides of the base 10. The vacuum chamber 20 is arranged between the first positioning plates 13 and the second positioning plates 14. The first positioning plates 13 and the second positioning plates 14 abut against the side portions of the vacuum chamber 20 to limit the position of the vacuum chamber 20. Thus, before the vacuum chamber 20 is mounted on the base 10 through the locking structure 30, the position of the vacuum chamber 20 is limited by the first positioning plates 13 and the second positioning plates 14, making it difficult for the vacuum chamber 20 and the base 10 to shake relative to each other.

[0035] In some alternative embodiments, inclined portions 141 are formed on the sides of the first positioning plates 13 and the second positioning plates 14 facing each other. The inclined portion 141 of the first positioning plate 13 and the inclined portion 141 of the second positioning plate 14 gradually move away from each other in the direction away from the base 10. Thus, during the process of placing the vacuum chamber 20 on the base 10, the vacuum chamber 20 can be guided to be placed on the base 10 by the inclined portion 141 of the first positioning plate 13 and the inclined portion 141 of the second positioning plate 14.

[0036] In some alternative embodiments, a number of limiting blocks 15 are provided on the base 10. The limiting blocks 15 are located between the first positioning plates 13 and the second positioning plates 14. After the vacuum chamber 20 is placed on the base 10, the vacuum chamber 20 is pushed along the base 10 so that the vacuum chamber 20 moves between the first positioning plates 13 and the second positioning plates 14 until the side portion of the vacuum chamber 20 abuts against the limiting blocks 15.

[0037] In some alternative embodiments, the locking structure 30 includes a plurality of fixing screws 31. The plurality of fixing screws 31 are respectively and evenly arranged on both sides of the vacuum chamber 20. The fixing screws 31 are sequentially connected to the vacuum chamber 20 and the base 10 to lock the vacuum chamber 20 onto the base 10. Of course, the locking structure 30 can also adopt other suitable structures, such as a snap structure, a pressing block structure, etc. Among them, the pressing block structure includes a plurality of pressing blocks rotatably arranged on the base 10. After the pressing blocks rotate, the vacuum chamber 20 is pressed against the base 10.

[0038] In some alternative embodiments, a plurality of strip-shaped position adjustment grooves 26 are respectively arranged on both sides of the vacuum chamber 20; a plurality of mounting holes 16 are arranged on the base 10. The fixing screws 31 pass through the position adjustment grooves 26 and then are in threaded cooperation with the mounting holes 16. The vacuum chamber 20 and the fixing screws 31 can move relative to the extending direction of the position adjustment grooves 26, so that the vacuum chamber 20 can adjust its position relative to the base 10 along the extending direction of the position adjustment grooves 26.

[0039] The above-described vacuum chamber structure that can be quickly replaced can be applied to a vacuum chamber helium leak detection system. This vacuum chamber helium leak detection system includes: a vacuum chamber that can be quickly replaced. In this embodiment, the vacuum chamber helium leak detection system further includes a leak detector and a helium gas source. The leak detector is communicated with the leak detection space. The leak detector samples from the leak detection space. Specifically, a leak detection pipe is arranged on one side of the vacuum chamber 20. The leak detector is detachably connected to the leak detection pipe through a flange structure. The helium gas source is communicated with the workpiece 40 through the workpiece fixture 22, so as to facilitate filling the workpiece 40 with helium gas. The helium gas source can be detachably connected to the workpiece fixture 22 through a gas pipe and a quick connector.

[0040] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A vacuum chamber structure that can be quickly replaced, characterized in that, Comprising: A base, a vacuum chamber, a door panel, and a locking structure; The vacuum chamber has a cavity adapted to the size of the workpiece. A workpiece fixture and a fixture connecting pipe are installed in the cavity. The workpiece fixture is used to seal the interface of the workpiece. The fixture connecting pipe is connected to the workpiece fixture. The door panel seals the cavity of the vacuum chamber so that a leak detection space is formed around the vacuum chamber and the door panel; The vacuum chamber is detachably arranged on the base through the locking structure. A first positioning structure is arranged on the vacuum chamber, and a second positioning structure that is in positioning cooperation with the first positioning structure is arranged on the base.

2. The vacuum chamber structure according to claim 1, characterized in that: An installation plate is arranged at the bottom of the vacuum chamber. Two support bosses are arranged on the base. The installation plate is detachably installed on the two support bosses through the locking structure.

3. The structure of a vacuum chamber that can be quickly replaced according to claim 1, wherein: The first positioning structure includes a plurality of positioning holes arranged on the base. The second positioning structure includes a plurality of positioning columns respectively and evenly arranged on both sides of the vacuum chamber. The positioning columns are correspondingly in positioning cooperation with the positioning holes.

4. A quickly replaceable vacuum chamber structure according to claim 3, characterized in that: The top end of the positioning column gradually narrows in the direction away from the base.

5. A quickly replaceable vacuum chamber structure according to claim 1, characterized in that: A plurality of first positioning plates and a plurality of second positioning plates are respectively arranged on both sides of the base. The vacuum chamber is arranged between the first positioning plates and the second positioning plates. The first positioning plates and the second positioning plates abut against the side portion of the vacuum chamber to limit the position of the vacuum chamber.

6. The vacuum chamber structure according to claim 5, wherein: Inclined portions are formed on the sides of the first positioning plates and the second positioning plates facing each other. The inclined portion of the first positioning plate and the inclined portion of the second positioning plate gradually move away from each other in the direction away from the base.

7. A quickly replaceable vacuum chamber structure according to claim 5, characterized in that: A plurality of limiting blocks are arranged on the base. The limiting blocks are located between the first positioning plates and the second positioning plates. The side portion of the vacuum chamber abuts against the limiting blocks.

8. A quickly replaceable vacuum chamber structure according to any one of claims 1 to 7, characterized in that: The locking structure includes a plurality of fixing screws. The plurality of fixing screws are respectively and evenly arranged on both sides of the vacuum chamber. The fixing screws are sequentially connected to the vacuum chamber and the base so that the vacuum chamber is locked on the base.

9. The structure of a vacuum chamber that can be quickly replaced according to claim 8, wherein: A plurality of strip-shaped position adjustment slots are respectively arranged on both sides of the vacuum chamber; A plurality of installation holes are arranged on the base. The fixing screws pass through the position adjustment slots and then are in threaded cooperation with the installation holes.

10. A helium leak detection system for a vacuum chamber, characterized in that, Comprising: A vacuum chamber structure that can be quickly replaced according to any one of claims 1 to 9.

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