Leak detection device

Abstract

The utility model relates to a leak detection device, comprising a test platform, the center of which is provided with a placing area for placing a workpiece to be detected; the liquid inlet mechanism is arranged on the test platform; the device is characterized in that the test platform is provided with a surrounding frame at the periphery of the shelving area, the surrounding frame and the shelving area jointly define a collecting space for collecting leakage detection liquid, and one side wall of the surrounding frame is provided with a connecting structure for connecting a plugging assembly. The connecting structure is provided with at least two adjusting parts corresponding to different to-be-plugged parts of the to-be-detected workpiece, so that the plugging assembly can perform corresponding position adjustment corresponding to the different to-be-plugged parts of the to-be-detected workpiece. The leakage detection device has the advantages that the enclosure frame can collect leakage detection liquid generated in the leakage detection process of the leakage detection device, prevents the leakage detection liquid from overflowing and polluting the environment, can be used for installing the plugging assembly, and achieves the dual-purpose effect; and the leak detection device can adapt to plugging of different workpieces.

Description

Technical Field

[0001] The utility model relates to the technical field of workpiece detection, in particular to a leakage detection device. Background Art

[0002] In the prior art, some workpieces need to strictly ensure that their air tightness meets the design during the production process, and generally the workpiece is tested for air tightness as a whole. However, when testing the air tightness of such workpieces, in order to ensure the accuracy of the air tightness test, it is necessary to seal unimportant positions such as threaded holes in advance.

[0003] For example, the Chinese utility model patent with patent number ZL202221323614.X (authorization announcement number CN217716786U) discloses a large cavity leak detection device for an engine cylinder block, which seals the upper joint surface of the engine cylinder block with a first sealing gasket on a first sealing plate, seals the cylinder head mating surface of the engine cylinder block with a second sealing gasket on a second sealing plate, and seals other positions of the cylinder block with a sealing joint (specifically, the threaded holes of the cylinder block are sealed with bolts, and the main oil channel outlet of the cylinder block is sealed with a third sealing plate).

[0004] Although the leak detection device can identify the non-dense position of the engine cylinder by performing airtightness test after sealing with multiple sealing plates and sealing joints, the leak detection device still has the following limitations: First, since the position of the sealing plate is fixed, the leak detection device is only suitable for leak detection of the large cavity of the engine cylinder, but not for leak detection of other workpieces; second, the sealing method of the sealing plate is suitable for sealing the flat surface of the workpiece. If the part to be sealed of the workpiece is slightly tilted, the above-mentioned sealing method may result in the first sealing gasket and the part to be sealed not being in full contact, which will cause the problem of poor sealing and affect the detection accuracy. Therefore, further improvements to the prior art are needed. Utility Model Content

[0005] The first technical problem to be solved by the utility model is to provide a leakage detection device which can adapt to the blocking of different workpieces in view of the above-mentioned prior art.

[0006] The second technical problem to be solved by the present invention is to provide a leak detection device which can adapt to the part to be sealed and keep the part to be sealed sealed, in view of the above-mentioned prior art.

[0007] The technical solution adopted by the utility model to solve the above-mentioned first technical problem is: the leakage detection device comprises:

[0008] The test platform has a central holding area for the workpieces to be tested;

[0009] A liquid inlet mechanism, arranged on the test platform, for supplying leak detection liquid to the to-be-tested channel of the to-be-tested workpiece;

[0010] It is characterized in that: the test platform is provided with a frame on the periphery of the shelf area, and the frame and the shelf area together form a collection space for collecting leakage detection liquid, and a connecting structure for connecting a sealing component is provided on one of the side walls of the frame, and the connecting structure is provided with at least two adjustment parts corresponding to different parts to be sealed of the workpiece to be tested, so that the sealing component can be adjusted to the corresponding position corresponding to the different parts to be sealed of the workpiece to be tested.

[0011] Preferably, the connection structure includes a connection portion arranged parallel to the axis X where the channel to be detected is located, and the adjustment portion is arranged on the connection portion.

[0012] In order to enable the sealing component to adjust the corresponding position of different parts to be sealed of the workpiece to be inspected, preferably, at least two groups of first adjustment holes corresponding to different parts to be sealed of the workpiece to be inspected are provided on the first connecting part, and correspondingly, the adjusting part is also provided with a second adjustment hole corresponding to the first adjustment hole itself.

[0013] In order to solve the second technical problem mentioned above, preferably, the sealing assembly includes a driving member and a sealing joint coaxially connected to the output shaft of the driving member, a floating part is arranged in the sealing joint, and the floating part can allow the sealing joint to self-correct and compensate for the eccentricity when inserted into the part to be sealed of the workpiece to be inspected, and the driving member is arranged on the first connecting part.

[0014] There are many kinds of structures of the above-mentioned plugging joint. Preferably, the plugging joint also includes

[0015] A base is drivingly connected to an output shaft of the driving member;

[0016] An extrusion piece is constrained at the front end of the base through a connecting piece, and a gap is formed between the extrusion piece and the base;

[0017] The floating part is arranged in the gap between the extrusion member and the base, and the end surface of the floating part in contact with the extrusion member is formed with a convex part protruding toward the extrusion member, so that the extrusion member can be offset relative to the base;

[0018] A first sealing member is disposed on an end surface of the extrusion member away from the base and is at least partially exposed on the end surface of the extrusion member through a fixing member disposed on the extrusion member, and an extrusion space for the first sealing member to be disposed therein is formed between the fixing member and the extrusion member;

[0019] The sealing joint is driven by the driving member to gradually approach the workpiece to be inspected, and the extrusion member is guided by the floating part to compensate for the eccentricity with the part to be sealed, so that the first sealing member is squeezed and forms a sealed connection with the part to be sealed.

[0020] In order to realize the installation of the above-mentioned floating part, preferably, the base includes a seat body, the first end face of the seat body is provided with a first socket for inserting the output shaft of the driving member, the second end face of the seat body is provided with a second socket for inserting the tail of the floating part, and the tail of the floating part is arranged opposite to the convex part.

[0021] In order to achieve self-correction of the extruded piece and compensation of the eccentricity of the portion to be sealed, preferably, the second end face of the seat body is further provided with at least two third sockets for the connector to be inserted along the circumferential interval around the outer periphery of the second socket. Correspondingly, the extruded piece is provided with fourth sockets corresponding to each third socket on the end face opposite to the second end face of the seat body, and the first connecting section of the connector inserted into the fourth socket is a small diameter section, and a gap is left between the fourth socket, which allows it to self-correct and compensate for the eccentricity position internally, thereby allowing the extruded piece to be offset relative to the base.

[0022] Compared with the prior art, the advantages of the utility model are: on the one hand, a frame is arranged on the periphery of the shelf area, and the frame and the shelf area together enclose a collection space for collecting the leak detection liquid; on the other hand, a connecting structure for connecting the plugging component is arranged on one of the side walls of the frame; therefore, the frame can not only collect the leak detection liquid generated during the leak detection process of the leak detection device to prevent the leak detection liquid from overflowing and polluting the environment, but also can be used for the installation of the plugging component, thus playing a dual purpose; and at least two adjustment parts corresponding to different parts to be blocked of the workpiece to be detected are arranged on the connecting structure, so that the plugging component can adjust the corresponding position corresponding to the different parts to be blocked of the workpiece to be detected to adapt to the blocking of different workpieces. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the structure after three workpieces to be inspected are stacked in an embodiment of the utility model;

[0024] Figure 2 for Figure 1 A cross-sectional view of a workpiece to be inspected;

[0025] Figure 3 This is a schematic diagram of the structure of the leak detection device in the embodiment of the utility model;

[0026] Figure 4 for Figure 3 Schematic diagram of part of the structure (the workpiece to be detected is omitted);

[0027] Figure 5 for Figure 4 The enlarged view of point A in the middle;

[0028] Figure 6 This is a schematic diagram of the structure of three blocking components in an embodiment of the utility model;

[0029] Figure 7 for Figure 6 An exploded view of a plugging assembly;

[0030] Figure 8 for Figure 7 A cross-sectional view of the middle plugging assembly;

[0031] Fig. 9 It is a blocking cross-sectional view of the blocking component in the embodiment of the utility model. DETAILED DESCRIPTION

[0032] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0033] like Figures 1 to 9 As shown, it is a preferred embodiment of the utility model. Figure 2 As shown, the workpiece a to be detected in this embodiment is square, and one end of the workpiece a to be detected has three parts to be blocked 1a, of which two parts to be blocked 1a are circular and the other part to be blocked 1a is square. In order to improve the leak detection efficiency, multiple workpieces of similar models can be stacked in the actual leak detection process to form a Figure 1 The structure shown, Figure 1 The structure diagram is formed by stacking three workpieces a to be inspected. Figure 1 The square portions 1a to be sealed partially overlap, while the circular portions 1a to be sealed completely overlap.

[0034] The leak detection device in this embodiment includes a test platform 1 and a liquid inlet mechanism 2. A placing area 11 for placing a workpiece a to be detected is provided in the center of the test platform 1; the liquid inlet mechanism 2 is arranged on the test platform 1, and is used to supply leak detection liquid to the test channel to be detected of the workpiece a to be detected; the test platform 1 is provided with a frame 12 on the periphery of the placing area 11, and the frame 12 and the placing area 11 together form a collecting space 13 for collecting the leak detection liquid, and a connecting structure 3 for connecting a sealing component 4 is provided on one of the side walls of the frame 12, and at least two adjusting parts 31 corresponding to different parts to be sealed 1a of the workpiece a to be detected are provided on the connecting structure 3, so that the sealing component 4 can adjust the corresponding position corresponding to the different parts to be sealed 1a of the workpiece a to be detected.

[0035] The connection structure 3 in this embodiment includes a connection portion 32 arranged parallel to the axis X of the channel to be detected, and an adjustment portion 31 is arranged on the connection portion 32. The connection portion 32 is provided with at least two groups of first adjustment holes 34 corresponding to different portions to be blocked 1a of the workpiece a to be detected, and correspondingly, the adjustment portion 31 is also provided with second adjustment holes 35 corresponding to the first adjustment holes 34. Figure 2 and Figure 5 As shown, the connecting portion 32 is a flat plate, and the first adjustment hole 34 and the second adjustment hole 35 are both threaded holes.

[0036] In addition, the sealing assembly 4 includes a driving member 41 and a sealing joint 42 coaxially connected to the output shaft of the driving member 41. A floating portion 421 is arranged in the sealing joint 42. The floating portion 421 can allow the sealing joint 42 to self-correct and compensate for the eccentricity when inserted into the to-be-sealed portion 1a of the workpiece a to be inspected. The driving member 41 is arranged on the first connecting portion 32.

[0037] like Figure 7 and Figure 8 As shown, in this embodiment, the plugging joint 42 also includes a base 422, an extrusion piece 423 and a first sealing piece 424. The base 422 is drivingly connected to the output shaft of the driving piece 41; the extrusion piece 423 is constrained to the front end of the base 422 by a connecting piece, and there is a gap between the extrusion piece 423 and the base 422; the above-mentioned floating part 421 is arranged in the gap between the extrusion piece 423 and the base 422, and the end surface of the floating part 421 in contact with the extrusion piece 423 is formed with a convex part 4211 protruding toward the extrusion piece 423, so that the extrusion piece 423 can be offset relative to the base 422; the first The seal 424 is arranged on the end face of the extrusion member 423 away from the base 422, and is at least partially exposed on the end face of the extrusion member 423 through the fixing member 425 arranged on the extrusion member 423, and an extrusion space 40 for the first seal 424 to be arranged is formed between the fixing member 425 and the extrusion member 423; the sealing joint 42 gradually approaches the workpiece a to be detected under the drive of the driving member 41, and with the help of the floating part 421, the extrusion member 423 self-corrects the compensating eccentricity with the part to be sealed 1a, and then the first seal 424 is squeezed and forms a sealed connection with the part to be sealed 1a.

[0038] The base 422 in this embodiment includes a base body 51, a first end face of the base body 5 is provided with a first insertion hole 51 for inserting the output shaft of the driving member 41, a second end face of the base body 5 is provided with a second insertion hole 52 for inserting the tail of the floating portion 421, and the tail of the floating portion 421 is arranged opposite to the protrusion 4211; the second end face of the base body 5 is also provided with at least two third insertion holes 53 for inserting the connecting member 6 along the circumferential interval around the outer periphery of the second insertion hole 52, correspondingly, the extrusion member 423 is provided with fourth insertion holes 54 corresponding to each third insertion hole 53 on the end face opposite to the second end face of the base body 5, the first connecting section 61 of the connecting member 6 inserted into the fourth insertion hole 54 is a small diameter section, and a gap d is left between the fourth insertion hole 54, and the gap d can allow it to self-correct and compensate for the eccentric position internally, so that the extrusion member 423 can be offset relative to the base 422. The connecting member 6 in this embodiment is a bolt, which is divided into a first connecting section 61, a second connecting section 62 and a third connecting section 63 from the beginning to the end. The diameter of the third connecting section 63 is larger than the diameter of the first connecting section 61, and the diameter of the first connecting section 61 is larger than the diameter of the second connecting section 62, so the above-mentioned gap d is formed between the above-mentioned second connecting section 62 and the first connecting section 61.

[0039] like Figure 4 As shown, the test platform 1 is also provided with a filling seat 5 for filling the interior of the workpiece a to be tested which is open downward, and a clamping mechanism 7 for clamping the workpiece a to be tested. A second sealing member 9 is also provided on the periphery of the filling seat 5, and when the lower wall surface of the workpiece a to be tested is in abutment with the test platform 1, a sealed connection is formed between the second sealing member 9 and the lower wall surface of the workpiece a to be tested; the clamping mechanism 7 is located on the periphery of the filling seat 5, and a drainage hole 10 located in the collection space 13 is opened on the test platform 1, and a collection bucket (not shown in the figure) is connected to the bottom of the drainage hole 10 through a pipeline.

[0040] The working process of the leak detection device in this embodiment is as follows:

[0041] A. Assemble the workpiece a to be tested on the test platform 1, and make each clamping mechanism 7 clamp the upper surface of the workpiece a to be tested;

[0042] B. By controlling the driving member 41 to move, a sealing connection is formed between the first sealing member 424 on the plugging joint 42 and the portion to be plugged 1a ( Figure 3 There are three parts to be blocked 1a, that is, three driving members 41 are controlled to act); due to the floating part 421, the extrusion member 423 automatically corrects the compensation eccentricity with the part to be blocked 1a, so that the first sealing member 424 on the extrusion member 423 can be moved to better contact with the part to be blocked 1a, thereby improving the sealing reliability;

[0043] C. Let the leak detection liquid flow into the inlet 11b of the channel 1b to be detected, and let the leak detection liquid flow out of the outlet 12b of the channel 1b to be detected;

[0044] D. Observe the leakage of the channel 1b to be tested of the workpiece a to be tested and obtain the leakage detection result.

Claims

1. A leak detection device, comprising: A test platform (1) is provided with a placing area (11) in the center for placing a workpiece (a) to be tested; A liquid inlet mechanism (2) is arranged on the test platform (1) and is used to supply leak detection liquid to the to-be-tested channel (1b) of the to-be-tested workpiece (a); The test platform (1) is characterized in that: a frame (12) is provided on the periphery of the shelf area (11); the frame (12) and the shelf area (11) together enclose a collection space (13) for collecting leak detection liquid; a connecting structure (3) for connecting a sealing component (4) is provided on one of the side walls of the frame (12); the connecting structure (3) is provided with at least two adjusting parts (31) corresponding to different parts (1a) to be sealed of the workpiece (a) to be tested, so that the sealing component (4) can adjust the corresponding position corresponding to the different parts (1a) to be sealed of the workpiece (a) to be tested.

2. The leak detection device according to claim 1, characterized in that: The connection structure (3) comprises a connection portion (32) arranged parallel to the axis X where the channel to be detected is located, and the adjustment portion (31) is arranged on the connection portion (32).

3. The leak detection device according to claim 2, characterized in that: The connecting portion (32) is provided with at least two groups of first adjustment holes (34) corresponding to different parts (1a) to be blocked of the workpiece (a) to be detected, and correspondingly, the adjustment portion (31) is also provided with second adjustment holes (35) corresponding to the first adjustment holes (34) thereof.

4. The leak detection device according to claim 2 or 3, characterized in that: The blocking assembly (4) comprises a driving member (41) and a blocking joint (42) coaxially connected to an output shaft of the driving member (41); a floating portion (421) is arranged inside the blocking joint (42); the floating portion (421) can allow the blocking joint (42) to self-correct and compensate for the eccentricity when inserted into the portion to be blocked (1a) of the workpiece (a) to be detected; and the driving member (41) is arranged on the connecting portion (32).

5. The leak detection device according to claim 4, characterized in that: The plugging joint (42) also includes A base (422) is drivingly connected to an output shaft of the driving member (41); An extrusion member (423) is constrained at the front end of the base (422) through a connecting member, and a gap is provided between the extrusion member (423) and the base (422); The floating portion (421) is arranged in the gap between the extrusion member (423) and the base (422), and the end surface of the floating portion (421) in contact with the extrusion member (423) is formed with a convex portion (4211) protruding toward the extrusion member (423), so that the extrusion member (423) can be offset relative to the base (422); a first sealing member (424) disposed on an end surface of the extrusion member (423) away from the base (422), and at least partially exposed on the end surface of the extrusion member (423) through a fixing member (425) disposed on the extrusion member (423), wherein an extrusion space (40) for the first sealing member (424) to be disposed is formed between the fixing member (425) and the extrusion member (423); The sealing joint (42) is driven by the driving member (41) to gradually approach the workpiece (a) to be inspected, and with the help of the floating portion (421), the extrusion member (423) self-corrects the compensating eccentricity with the portion to be sealed (1a), thereby causing the first sealing member (424) to be squeezed and form a sealed connection with the portion to be sealed (1a).

6. The leak detection device according to claim 5, characterized in that: The base (422) comprises a base body (5), a first end surface of the base body (5) is provided with a first insertion hole (51) for inserting the output shaft of the driving member (41), a second end surface of the base body (5) is provided with a second insertion hole (52) for inserting the tail of the floating part (421), and the tail of the floating part (421) is arranged opposite to the convex part (4211).

7. The leak detection device according to claim 6, characterized in that: The second end face of the seat body (5) is also provided with at least two third insertion holes (53) for the connection member (6) to be inserted, spaced apart in the circumferential direction on the outer periphery of the second insertion hole (52). Correspondingly, the extrusion member (423) is provided with fourth insertion holes (54) corresponding to each third insertion hole (53) on the end face opposite to the second end face of the seat body (5). The first connection section (61) of the connection member (6) inserted into the fourth insertion hole (54) is a small diameter section, and a gap d is left between the connection member (6) and the fourth insertion hole (54). The gap d allows the connection member (6) to self-correct and compensate for the eccentric position, thereby enabling the extrusion member (423) to be offset relative to the base (422).

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