A multi-station air tightness testing device

Abstract

The utility model discloses a multi -station air -tight test device relates to heat exchanger core detection equipment technical field, aims at solving the low production efficiency problem of single -station detection, manual clamping operation in prior art, adopts the technical scheme, including outer box and installation frame, the outer box is the shell of top penetration, the inside of outer box is connected with installation frame through lifting cylinder, be equipped with the clamping assembly on the installation frame, be used for the primary location of heat exchanger core, still be equipped with clamping cylinder on the installation frame, and clamping cylinder drive intake pipe and sealed pipe are clamped and are located to heat exchanger core, and cooperate the air -tight test platform of outside to detect the brazing seam of heat exchanger core, adopt lifting cylinder to realize the automatic lifting of heat exchanger core, and clamping cylinder realizes the automatic clamping and relaxation of heat exchanger core, need not manual intervention, reduce the labor intensity of worker, avoid the error of manual operation simultaneously.

Description

Technical Field

[0001] This utility model relates to the technical field of heat exchanger core testing equipment, specifically a multi-station airtightness testing device. Background Technology

[0002] In the manufacturing process of heat exchangers, the quality of the brazing between the heat exchange tubes and the end plates directly determines the finished product qualification rate. If there are leaks in the brazing seams, the heat exchanger will not function properly and will eventually be scrapped. Existing airtightness testing fixtures can only test a single heat exchanger core. After each test, the workpiece must be disassembled and replaced before the next test can be started, making batch testing impossible. The clamping action of the fixtures is entirely manual, requiring workers to manually fix the heat exchanger cores, which is not only labor-intensive but also results in excessively long testing cycles and low production efficiency.

[0003] Therefore, a multi-station, automated combined airtightness testing device in the production process can quickly and effectively detect leaks in brazed joints. Utility Model Content

[0004] The technical problem to be solved by this invention is to overcome the existing defects and provide a multi-station airtightness testing device, which can effectively solve the problems in the background art.

[0005] To achieve the above objectives, this utility model discloses a multi-station airtightness testing device. The technical solution adopted is that it includes an outer box and a mounting frame. The outer box is a shell with a transparent top, and the mounting frame is connected to the inside of the outer box through a lifting cylinder. The mounting frame is equipped with a locking component for initial positioning of the heat exchanger core. The mounting frame is also equipped with a clamping cylinder. The clamping cylinder drives the air inlet pipe and the sealing pipe to clamp and limit the heat exchanger core. At the same time, it works with an external airtightness test bench to test the brazed joint of the heat exchanger core. The lifting cylinder realizes the automatic lifting and lowering of the heat exchanger core, and the clamping cylinder realizes the automatic clamping and loosening of the heat exchanger core without manual intervention, reducing the labor intensity of workers and avoiding errors caused by manual operation.

[0006] As a preferred embodiment of this utility model, the clamping cylinder includes a first clamping cylinder and a second clamping cylinder. The first clamping cylinder and the second clamping cylinder are located on the left and right sides of the mounting frame, and their telescopic ends are respectively connected to the air inlet pipe and the sealing pipe.

[0007] As a preferred technical solution of this utility model, one end of the air inlet pipe is provided with an air inlet that communicates with the interior. The air inlet is connected to an external airtightness test bench through an air pipe. The air inlet pipe is also provided with multiple sets of air outlets that communicate with the heat exchanger core. Sealing gaskets are provided between the air inlet pipe, the sealing pipe and the heat exchanger core. The sealing gaskets seal the end plate of the heat exchanger core. With multiple sets of air outlets on the air inlet pipe, together with the sealing pipe and the positioning assembly, multiple heat exchanger cores can be tested at one time, significantly increasing the testing volume per unit time and greatly improving production efficiency.

[0008] As a preferred embodiment of this utility model, both the air inlet pipe and the sealing pipe are provided with mounting plates at their bottoms. The mounting plates are slidably connected to the mounting frame, and support plates are provided on the opposing surfaces of the two sets of mounting plates. The support plates provide auxiliary support for the heat exchanger core.

[0009] As a preferred technical solution of this utility model, the positioning assembly includes a slide rail, a locking plate, and a slide block. The slide rail is mounted on the mounting frame, and the slide block is slidably connected to the slide rail. The slide block is engaged with bolts for limiting the position of the slide rail, and the slide block is also provided with a locking plate for positioning the heat exchanger core.

[0010] As a preferred technical solution of this utility model, the card plate is provided in two sets, symmetrically installed on the slide, and the top of the card plate is provided with a flange away from the slide, which facilitates the installation and testing of the heat exchanger core. By setting two sets of card plates on the slide of the carding assembly, the limiting space can be adjusted according to the heat exchanger core of different specifications without changing the tooling, thus improving the adaptability of the device.

[0011] Compared with the prior art, the beneficial effects of this utility model are: by setting multiple sets of air outlets on the air inlet pipe, and cooperating with the sealing pipe and the locking assembly, this utility model can inspect multiple heat exchanger cores at one time, significantly increasing the inspection volume per unit time and greatly improving production efficiency. The heat exchanger core is automatically raised and lowered using a lifting cylinder, and the heat exchanger core is automatically clamped and released using a clamping cylinder. No manual intervention is required, which reduces the labor intensity of workers and avoids errors caused by manual operation. Two sets of clamping plates are set on the slide of the clamping assembly, which can adjust the limiting space according to the heat exchanger core of different specifications without changing the tooling, thus improving the adaptability of the device. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of the present utility model. Figure 1 ; Figure 2 This is a schematic diagram of the structure of the present utility model. Figure 2 ; Figure 3 This is a partial structural diagram of the present invention; Figure 4 This is an enlarged view of section A of this utility model; Figure 5 This is a schematic diagram of the card slot assembly structure of this utility model; Figure 6 This is a schematic diagram of the control principle of this utility model.

[0013] In the diagram: 1. Outer casing; 2. First clamping cylinder; 3. Lifting cylinder; 4. Mounting frame; 5. Heat exchanger core; 6. Inlet pipe; 7. Sealing pipe; 8. Positioning assembly; 9. Second clamping cylinder; 10. Mounting plate; 11. Support plate; 12. Inlet; 13. Sealing gasket; 81. Slide rail; 82. Clamping plate; 83. Slide seat; 84. Bolt. Detailed Implementation

[0014] 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. Example 1

[0015] like Figures 1 to 6 As shown, this utility model discloses a multi-station airtightness testing device. The technical solution adopted includes an outer box 1 and a mounting frame 4. The outer box 1 is a shell with a transparent top, and can be filled with pure water as a detection medium to observe the leakage of the brazed seam of the heat exchanger core 5.

[0016] The mounting frame 4 is connected to the interior of the outer casing 1 via a lifting cylinder 3; The lifting cylinder 3 is vertically installed on the bottom inner side of the outer casing 1, with its telescopic end facing upward and fixedly connected to the mounting frame 4. Through telescopic movement, it drives the mounting frame 4 and the components above it to rise and fall as a whole, realizing the switching between "immersion in water for detection" and "rising out of the water surface for component replacement" of the heat exchanger core 5.

[0017] The mounting frame 4 is also equipped with a clamping cylinder, which drives the air inlet pipe 6 and the sealing pipe 7 to clamp and limit the heat exchanger core 5, while cooperating with an external airtightness test bench to test the brazing joint of the heat exchanger core 5.

[0018] The mounting frame 4 is a rectangular frame structure, serving as the mounting carrier for various functional components. The entire frame is suspended inside the outer casing 1 by the lifting cylinder 3, and can slide up and down along the inner wall of the outer casing 1 as the lifting cylinder 3 moves.

[0019] The clamping cylinder includes a first clamping cylinder 2 and a second clamping cylinder 9. The first clamping cylinder 2 and the second clamping cylinder 9 are located on the left and right sides of the mounting frame 4. The telescopic ends of the first clamping cylinder 2 and the second clamping cylinder 9 are arranged opposite to each other and are respectively connected to the air inlet pipe 6 and the sealing pipe 7.

[0020] The telescopic end of the first clamping cylinder 2 is fixedly connected to the air inlet pipe 6, and the telescopic end of the second clamping cylinder 9 is fixedly connected to the sealing pipe 7; the air inlet pipe 6 and the sealing pipe 7 are both horizontally arranged, and their axes are collinear, corresponding to the two ends of the heat exchanger core 5 to be tested.

[0021] By synchronously extending and retracting the first clamping cylinder 2 and the second clamping cylinder 9, the air inlet pipe 6 and the sealing pipe 7 are driven to move in opposite directions, thereby achieving automatic clamping or loosening of the heat exchanger core 5.

[0022] One end of the air inlet pipe 6 is provided with an air inlet 12 that communicates with the interior. The air inlet 12 is connected to the external air tightness test bench through an air pipe. The air inlet pipe 6 is also provided with multiple sets of air outlets that communicate with the heat exchanger core 5. A sealing gasket 13 is provided between the air inlet pipe 6, the sealing pipe 7 and the heat exchanger core 5. The sealing gasket 13 seals the end plate of the heat exchanger core 5.

[0023] The bottom of both the air inlet pipe 6 and the sealing pipe 7 is provided with mounting plates 10. The mounting plates 10 are slidably connected to the mounting frame 4, and the opposing surfaces of the two sets of mounting plates 10 are provided with support plates 11, which provide auxiliary support for the heat exchanger core 5.

[0024] Mounting plate 10 is fixed to the bottom of air intake pipe 6 and sealing pipe 7 respectively, and is slidably connected to the top of mounting frame 4. The top of mounting frame 4 is provided with a sliding groove that matches mounting plate 10 to ensure that air intake pipe 6 and sealing pipe 7 move stably in the horizontal direction.

[0025] The support plate 11 is used to support the bottom of the heat exchanger core 5 to prevent the core from shifting or deforming due to its own weight during clamping and testing.

[0026] The mounting frame 4 is provided with a locking component 8 for initial positioning of the heat exchanger core 5; The positioning assembly 8 includes a slide rail 81, a locking plate 82, and a slide block 83. The slide rail 81 is mounted on the mounting frame 4, and the slide block 83 is slidably connected to the slide rail 81. The slide block 83 is engaged with a bolt 84 for limiting the position of the slide rail 81. The slide block 83 is also provided with a locking plate 82 for positioning the heat exchanger core 5.

[0027] The slide block 83 is slidably mounted on the slide rail 81, and the bolt 84 is threaded through the slide block 83 and abuts against the slide rail 81.

[0028] Two sets of the clamping plates 82 are symmetrically installed on the slide block 83, and the top of the clamping plates 82 is provided with a flange away from the slide block 83, which facilitates the installation and testing of the heat exchanger core 5.

[0029] The working principle of this utility model: According to the specifications of the heat exchanger core 5 to be tested, two sets of clamping plates 82 are installed on the slide block 83, and the distance between the two sets of clamping plates 82 is adjusted. The slide block 83 is then locked with bolts 84. Multiple heat exchanger cores 5 are placed sequentially in the limiting space formed by the two sets of clamping plates 82, with the two ends of the heat exchanger core 5 aligned with the air inlet pipe 6 and the sealing pipe 7, respectively. At this time, the support plate 11 on the mounting plate 10 provides auxiliary support for the heat exchanger core 5, so that the heat exchanger core 5, the air inlet pipe 6, and the sealing pipe 7 are on the same horizontal plane.

[0030] Start the first clamping cylinder 2 and the second clamping cylinder 9. The telescopic ends of both extend synchronously, driving the air inlet pipe 6 and the sealing pipe 7 to move towards each other until the sealing gasket 13 is tightly fitted with the end plate of the heat exchanger core 5, thus completing the sealing and clamping of the heat exchanger core 5.

[0031] Connect the air pipe of the external airtightness test bench to the air inlet 12 of the air inlet pipe 6, turn on the test bench, and introduce pressurized argon gas into the air inlet pipe 6; the argon gas enters the core 5 of each heat exchanger through the outlet of the air inlet pipe 6, so that the internal pressure of the core reaches the test standard.

[0032] Start the lifting cylinder 3, and its telescopic end retracts, causing the mounting frame 4 and the clamped heat exchanger core 5 to descend until the heat exchanger core 5 is completely immersed in the pure water in the outer casing 1; observe whether there are bubbles emerging at the brazed seam of the core. If there are bubbles, mark it as a leaking workpiece.

[0033] After the test is completed, start the lifting cylinder 3, its telescopic end extends, driving the mounting frame 4 and the core to rise out of the water surface; close the test bench to release the internal pressure of the core; start the first clamping cylinder 2 and the second clamping cylinder 9, the telescopic end retracts, driving the air inlet pipe 6 and the sealing pipe 7 to move in opposite directions, releasing the heat exchanger core 5; take out the heat exchanger core 5 that has been tested, replace it with a new workpiece to be tested, and enter the next test cycle.

[0034] The circuits and mechanical connections involved in this utility model are common practices used by those skilled in the art, and technical inspiration can be obtained through a limited number of experiments. They are common knowledge.

[0035] Components not described in detail in this article are existing technologies.

[0036] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A multi-station airtightness testing device, characterized in that: Includes an outer casing (1) and a mounting frame (4). The outer casing (1) is a shell with a transparent top. The mounting frame (4) is connected to the interior of the outer casing (1) via a lifting cylinder (3). The mounting frame (4) is provided with a locking component (8) for initially limiting the position of the heat exchanger core (5); The mounting frame (4) is also equipped with a clamping cylinder. The clamping cylinder drives the air inlet pipe (6) and the sealing pipe (7) to clamp and limit the heat exchanger core (5). At the same time, it cooperates with the external air tightness test bench to test the brazing joint of the heat exchanger core (5).

2. The multi-station airtightness testing device according to claim 1, characterized in that: The clamping cylinder includes a first clamping cylinder (2) and a second clamping cylinder (9). The first clamping cylinder (2) and the second clamping cylinder (9) are located on the left and right sides of the mounting frame (4), and their telescopic ends are respectively connected to the air inlet pipe (6) and the sealing pipe (7).

3. A multi-station airtightness testing device according to claim 1 or 2, characterized in that: One end of the air inlet pipe (6) is provided with an air inlet (12) that communicates with the interior. The air inlet (12) is connected to the external air tightness test bench through an air pipe. The air inlet pipe (6) is also provided with multiple sets of air outlets that communicate with the heat exchanger core (5). The air inlet pipe (6) and the sealing pipe (7) are provided with sealing gaskets (13) between them and the heat exchanger core (5). The sealing gaskets (13) seal the end plate of the heat exchanger core (5).

4. A multi-station airtightness testing device according to claim 1 or 2, characterized in that: The bottom of the air inlet pipe (6) and the sealing pipe (7) are provided with mounting plates (10), the mounting plates (10) are slidably connected to the mounting frame (4), and the opposing surfaces of the two sets of mounting plates (10) are provided with support plates (11), the support plates (11) provide auxiliary support for the heat exchanger core (5).

5. The multi-station airtightness testing device according to claim 1, characterized in that: The positioning assembly (8) includes a slide rail (81), a locking plate (82), and a slide block (83). The slide rail (81) is mounted on the mounting frame (4). The slide block (83) is slidably connected to the slide rail (81). The slide block (83) is engaged with a bolt (84) for limiting the position of the slide rail (81). The slide block (83) is also provided with a locking plate (82) for positioning the heat exchanger core (5).

6. The multi-station airtightness testing device according to claim 5, characterized in that: The card plate (82) is provided in two sets, symmetrically installed on the slide (83), and the top of the card plate (82) is provided with a flange away from the slide (83) to facilitate the installation and testing of the heat exchanger core (5).

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