A cavity leak detection fixture

Abstract

The utility model belongs to cavity leak detection technical field, concretely is a kind of cavity leak detection clamp, for detecting the air tightness of workpiece, the workpiece includes the elongation area of one side and symmetrically arranged first side through-hole, second side through-hole, the lower through-hole is shaped in the workpiece lower end, clamp includes bottom plate, the bottom plate upper end is equipped with two groups first quick clamp and second quick clamp respectively, first quick clamp front end is fixed with first pressure block by connecting block;The utility model is through bottom plate, cover plate and workpiece upper and lower opening lamination, and the through-hole sealing of workpiece side is sealed by pressure block, finally air pipe connects gas source and clamp and workpiece are placed in water simultaneously, whether there is bubble is observed, to detect workpiece tightness;This kind of detection mode only needs a gas pump to be connected with air pipe through hose, and the overall cost of detection equipment is low, stable and reliable, and the failure rate is low, and the detection effect can be guaranteed.

Description

Technical Field

[0001] This utility model belongs to the field of cavity leak detection technology, and in particular relates to a cavity leak detection fixture. Background Technology

[0002] When connecting cavity-type parts, it is necessary to ensure the sealing of the connection points. However, sealing tests are usually conducted after the overall equipment is assembled. If a cavity leaks, it needs to be disassembled and replaced, wasting disassembly and assembly time. There is a method that can test individual cavities. This method mainly uses air inflation to detect whether there is any leakage in the inflated state. However, since gas cannot be directly observed for leakage, it requires the coordinated operation of air pumps, solenoid valves, flow valves, pressure sensors, and gas volume sensors. Although it has good detection results, the purchase cost of the entire set of equipment is high, which is not conducive to the application of manufacturers with small production volumes.

[0003] Due to cost considerations, existing testing methods rely solely on visual inspection to determine if the test surface is smooth and flat, which cannot accurately identify whether there is an air leak and therefore cannot guarantee quality.

[0004] To address the aforementioned issues, this application proposes a cavity leak detection fixture. Utility Model Content

[0005] The purpose of this invention is to provide a cavity leak detection fixture, which solves the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution: This utility model relates to a cavity leak testing fixture for detecting the airtightness of a workpiece. The workpiece includes an extended area on one side and symmetrically arranged first and second side through holes. A lower through hole is formed at the lower end of the workpiece. The fixture includes a base plate. Two sets of first and second quick clamps are respectively provided on the upper end of the base plate. A first clamping block is fixed to the front end of the first quick clamp via a connecting block. A detachable second clamping block is provided to the front end of the second quick clamp via a transition block. A cover plate is connected to the top of the base plate via a column. A positioning seat for placing the workpiece is provided on the base plate. An air pipe is opened in the base plate and connects from the side to the interior of the positioning seat.

[0007] Furthermore, the first clamping block clamps the workpiece from the outside of the second side through hole, and the clamping surface of the first clamping block is provided with a first sealing ring; the second clamping block clamps the workpiece from the outside of the first side through hole and is opposite to the first clamping block, and the clamping surface of the second clamping block is provided with a second sealing ring.

[0008] Furthermore, the adapter block has symmetrical hanging grooves, and the second clamping block has symmetrical hanging strips that are connected to the hanging grooves.

[0009] Furthermore, the column is provided with several columns along the side profile of the workpiece and is fixed perpendicularly to the base plate, and the cover plate is provided with clamping holes corresponding to the columns and fixed with bolts.

[0010] Furthermore, the inner side of the positioning seat is provided with a support pad that matches the contour of the bottom surface of the workpiece, and the base plate is provided with several pressure plates along the outer contour of the workpiece. The pressure plates press the workpiece onto the support pad by bolts.

[0011] Furthermore, a pad is fixed on the base plate for installing the first quick clamp and the second quick clamp.

[0012] Furthermore, both the base plate and the cover plate are provided with recesses for inserting the ends of the columns.

[0013] Furthermore, a handle is fixed to the cover plate.

[0014] This utility model has the following beneficial effects: This invention uses a base plate and cover plate that fit into the upper and lower openings of the workpiece. A clamping block seals the through holes on the side of the workpiece. Finally, an air pipe is connected to an air source, and the fixture and workpiece are placed in water simultaneously. The workpiece's sealing performance is tested by observing whether there are air bubbles. This testing method only requires an air pump connected to the air pipe via a hose. The overall testing equipment is low-cost, stable, reliable, and has a low failure rate, while ensuring testing effectiveness.

[0015] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of 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 appearance structure of this utility model during testing; Figure 2 for Figure 1 A schematic diagram of the structure after the middle cover plate was removed; Figure 3 A schematic diagram of the fixture in the open state; Figure 4 This is an enlarged structural diagram of the base plate; Figure 5 This is a schematic diagram showing the disassembly of the adapter block and the second clamping block; Figure 6This is an enlarged structural schematic diagram of the workpiece; The attached diagram lists the components represented by each number as follows: In the diagram: 1. Base plate; 11. Positioning seat; 12. Support pad; 13. Air pipe; 14. Pad block; 2. First quick clamp; 21. Connecting block; 22. First clamping block; 221. First sealing ring; 3. Second quick clamp; 31. Adapter block; 311. Hanging groove; 32. Second clamping block; 321. Hanging strip; 322. Second sealing ring; 4. Column; 5. Cover plate; 51. Handle; 52. Clamping hole; 6. Pressure plate; 7. Workpiece; 71. Extension area; 72. First side through hole; 73. Second side through hole; 74. Lower through hole. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0019] In the description of this utility model, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inner", "around" and other terms indicating orientation or positional relationship are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0020] Please see Figures 1-6 As shown, this utility model is a cavity leak testing fixture used to test the airtightness of a workpiece 7. The workpiece 7 includes an extension area 71 on one side and symmetrically arranged first side through holes 72 and second side through holes 73. The lower end of the workpiece 7 is formed with a lower through hole 74. The fixture includes a base plate 1. The upper end of the base plate 1 is provided with two sets of first quick clamps 2 and second quick clamps 3 respectively. The front end of the first quick clamp 2 is fixed with a first clamping block 22 through a connecting block 21. The front end of the second quick clamp 3 is provided with a detachable second clamping block 32 through a transition block 31. A cover plate 5 is connected to the top of the base plate 1 through a column 4. The base plate 1 is provided with a positioning seat 11 for placing the workpiece 7. An air pipe 13 is opened in the base plate 1 and connects from the side to the inside of the positioning seat 11. In this embodiment, the contact surface between the cover plate 5 and the upper end of the workpiece 7 has no elastic structure. The two are rigidly attached to each other to make the detection effect more reliable.

[0021] Specifically, the first clamping block 22 clamps the workpiece 7 from the outside of the second side through hole 73, and the clamping surface of the first clamping block 22 is provided with a first sealing ring 221. The second clamping block 32 clamps the workpiece 7 from the outside of the first side through hole 72 and is opposite to the first clamping block 22. The clamping surface of the second clamping block 32 is provided with a second sealing ring 322. In this embodiment, the first clamping blocks 22 and 33 achieve horizontal clamping of the workpiece 7 under the interaction force of the first quick clamp 2 and the second quick clamp 3, and at the same time seal the first side through hole 72 and the second side through hole 73.

[0022] Furthermore, the adapter block 31 has symmetrical hanging grooves 311, and the second clamping block 32 has symmetrical hanging strips 321 that are attached to the hanging grooves 311. The attachment operation in this embodiment is simple, and the connection reliability between the adapter block 31 and the second clamping block 32 can be ensured under the final thrust of the second quick clamp 3.

[0023] Furthermore, in order to ensure the stable support of the cover plate 5 on the base plate 1, several columns 4 are provided along the side contour of the workpiece 7 and are fixed perpendicularly to the base plate 1. The cover plate 5 is provided with pressing holes 52 corresponding to the columns 4 and fixed with bolts.

[0024] Specifically, the inner side of the positioning seat 11 is provided with a support pad 12 that matches the bottom contour of the workpiece 7. Several pressure plates 6 are provided on the base plate 1 along the outer contour of the workpiece 7. The pressure plates 6 press the workpiece 7 onto the support pad 12 by bolts. In this embodiment, the top of the support pad 12 is a flat surface that directly fits the bottom surface of the workpiece 7. No elastic sealing element is provided between the two. The quality of the bottom surface of the workpiece 7 is detected by rigid contact. Furthermore, the pressure plate 6 has a vertical through groove in the middle and a non-through groove at the bottom. The pressure plate 6 is positioned in the clamping position and the non-clamping position by two bolts slidingly engaging with the two grooves; specifically as follows... Figure 3 The pressure plate 6 shown is in a non-clamping state. When clamping is required, the pressure plate 6 is moved towards the workpiece 7 and its front end is placed on top of it. At this time, the bolts penetrating the slide groove are tightened, thereby creating pressure that tightly presses the workpiece 7 against the support pad 12. Figure 1 and Figure 2 As shown in the diagram; when it is necessary to remove workpiece 7, first loosen the through bolt and move the pressure plate 6 backward.

[0025] Furthermore, in order to make the first clamping block 22, the second clamping block 32, the first side through hole 72, and the second side through hole 73 at the same height, a pad 14 is fixed on the base plate 1 for the installation of the first quick clamp 2 and the second quick clamp 3.

[0026] Furthermore, in order to ensure that the column 4 and the cover plate 5 are stably connected on the base plate 1, both the base plate 1 and the cover plate 5 are provided with recessed grooves for the insertion of the end of the column 4. After the lower end of the column 4 is inserted into the base plate 1, it is fixed by bolts. In this embodiment, the recessed groove has a radial limiting effect on the column 4.

[0027] Furthermore, in order to facilitate the placement and removal of the cover plate 5 on the workpiece 7, a handle 51 is fixed on the cover plate 5. There are two handles 51, which are installed on the cover plate 5 by bolts.

[0028] One specific application of this embodiment is: the air pipe 13 extends outward from the side of the base plate 1 and is provided with a connector, and the air pump is connected through the connector and the hose; for example... Figure 3 The fixture is shown in the loosened state. First, the second clamping block 32 needs to be removed from the second clamping block 32, and then the workpiece 7 is placed. When placing the workpiece 7, the extension area 71 is tilted downward and placed below the adapter block 31, and then placed horizontally on the support pad 12 in the positioning seat 11. Slide the pressure plate 6 toward the workpiece 7, then tighten the bolts so that the lower end of the workpiece 7 fits against the support pad 12; connect the second clamping block 32 to the adapter block 31 through the cover of the hanging strip 321 and the hanging groove 311; push the first quick clamp 2 so that the first clamping block 22 blocks the second side through hole 73; at this time, the first sealing ring 221 is compressed to ensure a seal; push the second quick clamp 3 so that the second clamping block 32 blocks the first side through hole 72; at this time, the second sealing ring 322 is compressed to ensure a seal. The cover plate 5 is placed on the upper end of the workpiece 7 and the clamping hole 52 is aligned with the column 4. The cover plate 5 and the column 4 are then clamped together by bolts. Place the fixture holding workpiece 7 in a water tank, and use an air pump to inflate workpiece 7. The air tightness is judged by visually observing whether there are air bubbles.

[0029] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0030] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A cavity leak testing fixture for testing the airtightness of a workpiece (7), the workpiece (7) comprising an extension area (71) on one side and symmetrically arranged first side through holes (72) and second side through holes (73), the lower end of the workpiece (7) having a lower through hole (74), the fixture comprising a base plate (1), characterized in that: The upper end of the base plate (1) is provided with two sets of first quick clamps (2) and second quick clamps (3). The front end of the first quick clamp (2) is fixed with a first clamping block (22) through a connecting block (21). The front end of the second quick clamp (3) is provided with a detachable second clamping block (32) through a transition block (31). The base plate (1) is connected to a cover plate (5) through a column (4). The base plate (1) is provided with a positioning seat (11) for placing the workpiece (7). An air pipe (13) is opened in the base plate (1) from the side to the inside of the positioning seat (11).

2. The cavity leak detection fixture according to claim 1, characterized in that: The first clamping block (22) clamps the workpiece (7) from the outside of the second side through hole (73), and the clamping surface of the first clamping block (22) is provided with a first sealing ring (221). The second clamping block (32) clamps the workpiece (7) from the outside of the first side through hole (72) and is opposite to the first clamping block (22), and the clamping surface of the second clamping block (32) is provided with a second sealing ring (322).

3. A cavity leak detection fixture according to claim 1, characterized in that: The adapter block (31) has symmetrical hanging grooves (311), and the second pressing block (32) has symmetrical hanging strips (321) that are connected to the hanging grooves (311).

4. A cavity leak detection fixture according to claim 1, characterized in that: The column (4) is provided with several columns along the side profile of the workpiece (7) and is fixed perpendicularly to the base plate (1). The cover plate (5) is provided with pressing holes (52) corresponding to the column (4) and fixed with bolts.

5. A cavity leak detection fixture according to claim 1, characterized in that: The positioning seat (11) has a support pad (12) that matches the bottom contour of the workpiece (7) on its inner side. The base plate (1) has several pressure plates (6) along the outer contour of the workpiece (7). The pressure plates (6) press the workpiece (7) onto the support pad (12) by bolts.

6. A cavity leak detection fixture according to claim 1, characterized in that: A pad (14) is fixed on the base plate (1) for the installation of the first quick clamp (2) and the second quick clamp (3).

7. A cavity leak detection fixture according to claim 1, characterized in that: Both the base plate (1) and the cover plate (5) are provided with recesses for inserting the end of the column (4).

8. A cavity leak detection fixture according to claim 1, characterized in that: A handle (51) is fixed on the cover plate (5).

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