A leak detection tool

Abstract

This utility model discloses a leak detection fixture, including a movable platform with a water tank mounted on top. A clamping assembly is installed inside the water tank, and a die-cast part is installed inside the clamping assembly. Drive mechanisms for moving the die-cast part are located on both sides of the water tank. An air pump for injecting gas into the die-cast part is located below the water tank. After fixing the die-cast part inside the clamping assembly, dry compressed air is injected into the sealed cavity inside the die-cast part through a drain pipe. The die-cast part is then placed below the water surface in the water tank. After a certain pressure and time, if tiny bubbles continuously emerge from the surface of the die-cast part, the leak is considered unsatisfactory. Personnel can visually and accurately locate the leak based on the bubble positions, thus improving detection efficiency.

Description

Technical Field

[0001] This utility model relates to the field of die casting inspection, and in particular to a leak detection tool. Background Technology

[0002] Die casting is a metal part formed by injecting molten metal (such as aluminum, zinc, magnesium, and copper alloys) into a precision mold at high pressure and high speed, and then cooling it. Its core process characteristics are high pressure and high-speed filling, which can mass-produce complex-shaped thin-walled parts in a short time. Since common defects in die castings, such as porosity, shrinkage cavities, and cracks, can form microscopic leakage channels, sealing tests are the core link in the quality inspection of die castings, which are directly related to the product's functional safety and lifespan.

[0003] The existing detection method involves sealing the internal cavity of the die-casting part, injecting dry compressed air into the cavity, and finally detecting whether the air pressure decreases using a sensor. However, for die-casting parts with small air leakage, the sensor needs to take a long time to determine whether the sealing is qualified. For die-casting parts with micro-leakage, the long detection time for sensor to determine the sealing is difficult to intuitively judge the sealing. Therefore, a leakage detection fixture is proposed to solve the above problems. Utility Model Content

[0004] The purpose of this utility model is to provide a leak detection fixture to solve the problem in the background art that the detection time for judging the sealing of die-cast parts with micro-leakage by sensors is long and it is difficult to judge the sealing intuitively. The technical solution of this utility model provides a solution that is significantly different from the prior art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A leak detection fixture includes a movable platform with a water tank mounted on top. A clamping assembly is installed inside the water tank, and a die-cast part is installed inside the clamping assembly. Both sides of the water tank are equipped with drive mechanisms for moving the die-cast part, and an air pump for injecting gas into the die-cast part is located below the water tank.

[0007] Preferably, the lower end of the movable platform is provided with lockable casters, the air pump is installed on the movable platform, a drain pipe is provided below the water tank, and the drive mechanism includes an electric telescopic rod, a connecting plate and a column, with the piston rod inside the electric telescopic rod and the upper end of the column respectively connected to both ends of the connecting plate.

[0008] Preferably, the clamping assembly includes an upper clamping plate, a lower clamping plate, a lower plug, a sealing ring, a guide post, a drainage pipe, a fixing plate, and an airbag. The die-cast body is located between the upper clamping plate and the lower clamping plate. The lower end of the guide post is welded to the lower clamping plate, and the upper end of the guide post passes through the upper clamping plate. The upper end of the guide post is provided with a threaded wall and a nut. The nut is threadedly connected to the guide post. The airbag is made of flexible rubber.

[0009] Preferably, the fixed plate is mounted below the upper clamping plate, the airbag is located inside the fixed plate, the drainage tube passes through the upper clamping plate and the fixed plate, the drainage tube has a branch tube on its side, the branch tube extends into the airbag, and the fixed plate is located at the upper open end of the die-cast body.

[0010] Preferably, the lower plug is installed on the upper part of the lower clamping plate, and a sealing ring is provided on the side of the lower plug. The lower plug is located at the lower opening end of the die-cast body.

[0011] Preferably, both ends of the lower clamping plate are provided with protrusions, the inside of the water tank is provided with a limiting groove, the protrusions are located inside the limiting groove, and the lower end of the column is connected to the lower clamping plate.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] In this invention, after the die-cast part is fixed between the upper and lower clamping plates by guide pillars, the air pump injects dry compressed air into the cavity inside the die-cast part through the drainage pipe. Some of the compressed air enters the air bladder, causing the air bladder to expand and block the upper opening of the die-cast part. The lower blocking block cooperates with the sealing ring to block the lower opening of the die-cast part. At this time, the cavity inside the die-cast part is sealed. Then, the electric telescopic rod drives the die-cast part into the water tank. The die-cast part is completely submerged in water. After a certain air pressure and a unit of time, if tiny bubbles continue to emerge from the surface of the die-cast part, the sealing performance is unqualified. Personnel can intuitively and accurately find the leak location based on the position of the bubbles, thus improving the detection efficiency. Attached Figure Description

[0014] Figure 1 A schematic diagram of the main structure of the leak detection fixture;

[0015] Figure 2 This is a schematic diagram of the water tank in the leak detection fixture;

[0016] Figure 3 For leak detection tooling Figure 2 Enlarged schematic diagram of part A of the structure;

[0017] Figure 4 This is a schematic diagram of the clamping components in a leak detection fixture.

[0018] In the diagram: 1. Water tank; 101. Drain pipe; 102. Limiting groove; 2. Die-cast body; 3. Movable platform; 301. Casters; 4. Electric telescopic rod; 401. Connecting plate; 402. Column; 5. Air pump; 6. Clamping assembly; 601. Upper clamping plate; 602. Lower clamping plate; 6021. Protrusion; 603. Lower blocking block; 604. Sealing ring; 605. Guide post; 6051. Nut; 606. Drainage pipe; 6061. Branch pipe; 607. Fixing plate; 7. Airbag. Detailed Implementation

[0019] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element 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. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0020] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0021] 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 protection scope of the present utility model.

[0022] Please see Figure 1-4In this utility model, a leak detection fixture includes a movable platform 3, with a lockable caster wheel 301 at the lower end of the movable platform 3, a water tank 1 installed on the upper part of the movable platform 3, a drain pipe 101 installed below the water tank 1, a clamping assembly 6 installed inside the water tank 1, a die-cast body 2 installed inside the clamping assembly 6, electric telescopic rods 4 installed on both sides of the water tank 1, the piston rod and the upper end of the column 402 inside the electric telescopic rod 4 being connected to both ends of the connecting plate 401 respectively, and an air pump 5 installed below the water tank 1.

[0023] Example 1: Please refer to Figure 1-4 In this embodiment of the utility model, a leakage detection fixture includes a clamping assembly 6 comprising an upper clamping plate 601, a lower clamping plate 602, a lower plug 603, a sealing ring 604, a guide post 605, a drainage pipe 606, a fixing plate 607, and an airbag 7. The die-cast body 2 is located between the upper clamping plate 601 and the lower clamping plate 602. The lower end of the guide post 605 is welded to the lower clamping plate 602, and the upper end of the guide post 605 passes through the upper clamping plate 601. The upper end of the guide post 605 is provided with a threaded wall and a nut 6051. The nut 6051 is threadedly connected to the guide post 605. The airbag 7 is made of flexible rubber.

[0024] The fixed plate 607 is mounted under the upper clamping plate 601. The airbag 7 is located inside the fixed plate 607. The drainage pipe 606 passes through the upper clamping plate 601 and the fixed plate 607. A branch pipe 6061 is provided on the side of the drainage pipe 606. The branch pipe 6061 extends into the interior of the airbag 7. The fixed plate 607 is located at the upper open end of the die-cast body 2.

[0025] The lower block 603 is installed on the upper part of the lower clamping plate 602. The sealing ring 604 is located on the side of the lower block 603. Both ends of the lower clamping plate 602 are provided with protrusions 6021. The water tank 1 is provided with a limiting groove 102. The protrusions 6021 are located inside the limiting groove 102. The lower end of the column 402 is connected to the lower clamping plate 602.

[0026] The lower end of the die-cast body 2 is fitted with the lower clamping plate 602, so that the lower plug 603 and the sealing ring 604 cooperate to completely seal the lower opening end of the die-cast body 2. The lower plug 603 is a contoured structure designed according to the structure of the lower opening end of the die-cast body 2, thereby ensuring that the sealing ring 604 can effectively fit the lower opening end of the die-cast body 2. Then, the upper clamping plate 601 is placed on the upper end of the die-cast body 2, so that the fixing plate 607 and the airbag 7 are completely located inside the upper opening end of the die-cast body 2. Finally, the upper clamping plate 601 is fixed to the guide post 605 by the nut 6051, so that the die-cast body 2 is fixed between the upper clamping plate 601 and the lower clamping plate 602.

[0027] After the die-cast body 2 is fixed between the upper clamping plate 601 and the lower clamping plate 602 by the guide post 605, the air pump 5 injects dry compressed air into the cavity inside the die-cast body 2 through the drainage pipe 606. Some of the compressed air enters the interior of the air bladder 7, causing the air bladder 7 to expand and block the upper opening of the die-cast body 2. The lower blocking block 603 cooperates with the sealing ring 604 to block the lower opening of the die-cast body 2. At this time, the cavity inside the die-cast body 2 is sealed. Then, the electric telescopic rod 1 drives the die-cast body 2 into the interior of the water tank, and the die-cast body 2 is completely submerged in water. Finally, after a certain air pressure and a certain unit of time, if tiny bubbles continue to emerge from the surface of the die-cast body 2, the sealing performance is unqualified. Personnel can intuitively and accurately find the leak location based on the position of the bubbles, which improves the detection efficiency.

[0028] The working principle of this utility model is as follows: After the die-cast body 2 is fixed inside the clamping assembly 6, dry compressed air is injected into the sealed cavity inside the die-cast body 2 through the drainage pipe 606. Then, the die-cast body 2 is placed below the water surface in the water tank. After a certain air pressure and a certain unit of time, if tiny bubbles continue to emerge from the surface of the die-cast body 2, the sealing performance is unqualified. Personnel can intuitively and accurately find the leak location based on the position of the bubbles, which improves the detection efficiency.

[0029] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0030] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A water leakage detection tool comprising a movable table (3), characterized in that: A water tank (1) is installed on the top of the active platform (3). A clamping assembly (6) is installed inside the water tank (1). The die-cast body (2) is installed inside the clamping assembly (6). A driving mechanism for moving the die-cast body (2) is provided on both sides of the water tank (1). An air pump (5) for injecting gas into the die-cast body (2) is provided below the water tank (1).

2. The water leakage detection tool according to claim 1, characterized in that: The lower end of the movable platform (3) is provided with lockable casters (301), the air pump (5) is installed on the movable platform (3), and the drain pipe (101) is provided below the water tank (1). The driving mechanism includes an electric telescopic rod (4), a connecting plate (401) and a column (402). The piston rod inside the electric telescopic rod (4) and the upper end of the column (402) are respectively connected to the two ends of the connecting plate (401).

3. The water leakage detection tool according to claim 1, characterized in that: The clamping assembly (6) includes an upper clamping plate (601), a lower clamping plate (602), a lower plug (603), a sealing ring (604), a guide post (605), a drainage pipe (606), a fixing plate (607), and an airbag (7). The die-cast body (2) is located between the upper clamping plate (601) and the lower clamping plate (602). The lower end of the guide post (605) is welded to the lower clamping plate (602), and the upper end of the guide post (605) passes through the upper clamping plate (601). The upper end of the guide post (605) is provided with a threaded wall and a nut (6051). The nut (6051) is threadedly connected to the guide post (605). The airbag (7) is made of flexible rubber.

4. The water leak detection tool of claim 3, wherein: The fixed plate (607) is mounted under the upper clamping plate (601), the airbag (7) is located inside the fixed plate (607), the drainage tube (606) passes through the upper clamping plate (601) and the fixed plate (607), the drainage tube (606) is provided with a branch tube (6061) on the side, the branch tube (6061) extends into the airbag (7), and the fixed plate (607) is located at the upper opening end of the die-cast body (2).

5. The water leak detection tool of claim 3, wherein: The lower plug (603) is installed on the upper part of the lower clamping plate (602), and a sealing ring (604) is provided on the side of the lower plug (603). The lower plug (603) is located at the lower opening end of the die-cast body (2).

6. The water leak detection tool of claim 3, wherein: Both ends of the lower clamping plate (602) are provided with protrusions (6021), and the water tank (1) is provided with a limiting groove (102). The protrusions (6021) are located inside the limiting groove (102), and the lower end of the column (402) is connected to the lower clamping plate (602).

Images