A flat tube burst testing device

Abstract

The utility model relates to a kind of flat tube blasting test device, including the test box of upper end opening, the front and rear inner wall of test box is close to upper opening and is provided with installation guide rail;Two support plate groups are installed on installation guide rail, and two support plate groups can slide along installation guide rail and can be fixed in any position, two the support plate groups are respectively provided with two compression blocks, and two compression blocks are connected with driving device, two compression blocks can be pushed to resist contact;Nozzle is provided in the test box outside any one support plate group, and it is communicated with liquid supply device in test box, the nozzle is communicated with spray needle, and spray needle extends between two compression blocks of same side. Two support plate groups can slide along installation guide rail and be fixed in any position, can flexibly adjust interval according to flat tube length, adapt to the test demand of different length specifications of flat tube, break the limitation that only single length flat tube can be tested by existing device.

Description

Technical Field

[0001] This utility model relates to the field of flat tube production technology, specifically a flat tube bursting test device. Background Technology

[0002] Aluminum flat tubes, as the core heat transfer element of condensers, are widely used in heat exchange systems such as automotive and residential air conditioning systems due to their advantages of lightweight design, high thermal conductivity, and compact structure. Their structural features include a flat cross-section and numerous internal microchannels. This design effectively increases the heat exchange area, reduces fluid flow resistance, and thus improves the overall heat exchange performance of the condenser.

[0003] During operation, condensers must withstand refrigerant pressure and operate under constant high pressure and alternating hot and cold conditions. If the aluminum flat tubes have strength defects, leaks or even bursts can easily occur, leading to condenser failure. Therefore, burst strength testing during the aluminum flat tube production process is a crucial step in ensuring product quality. Existing burst testing devices are mostly designed for round tubes and are difficult to adapt to the flat cross-section structure of aluminum flat tubes. This results in problems such as poor sealing, uneven pressure application, and insufficient accuracy of test results. While existing dedicated flat tube testing devices, such as the one disclosed in patent CN216816322U, which is suitable for burst testing of flat tubes, are complex and cumbersome to operate, requiring the installation of sealing rings and precise operation to ensure the flat tube connects to the collection chamber. Furthermore, they are limited to a single flat tube length, failing to meet the testing needs of diverse flat tube sizes. Utility Model Content

[0004] To address the technical problems existing in the background art, this utility model provides a flat tube bursting test device.

[0005] The technical solution of this utility model is as follows: A flat tube bursting test device includes a test box with an opening at the top, and mounting rails are provided on the front and rear inner walls of the test box near the top opening. Two support plate assemblies are installed on the mounting guide rail, and the two support plate assemblies can slide along the mounting guide rail and be fixed at any position. Two clamping blocks are respectively provided on the two support plate assemblies, and the two clamping blocks are connected to a driving device, which can push the two clamping blocks to collide. A nozzle is installed inside the test chamber on the outside of any support plate group, and it is connected to the liquid supply device inside the test chamber. The nozzle is connected to a spray needle, and the spray needle extends to the space between two clamping blocks on the same side.

[0006] To facilitate adjustment of the position between the two support plate assemblies and to accommodate tests of flat tubes of different lengths, sliders are installed at the bottom of both ends of the two support plate assemblies, and are fixed to the mounting guide rail by fastening bolts passing through the support plate assemblies and sliders.

[0007] The two clamping blocks are specifically designed such that one clamping block on the same support plate group is fixedly installed with it, while the other is slidably installed and connected to a drive device, which can push it to move closer to or away from the fixed clamping block.

[0008] The drive device is specifically designed as follows: the drive device includes a telescopic cylinder mounted on the support plate assembly; the clamping block has a trapezoidal groove at one end near the telescopic cylinder; and the output end of the telescopic cylinder is equipped with a connecting block that matches the trapezoidal groove.

[0009] In order to recover the liquid flowing out of the flat tube after the explosion test, a collection box is set at the bottom of the test chamber, and a leakage mesh plate is set at the top of the collection box. The bottom of the collection box is connected to the liquid supply device through a connecting pipe.

[0010] In order to reduce the contact area with the flat tube and thus increase the extrusion pressure, pressure-boosting grooves are opened from top to bottom in the middle of the opposite side of the two clamping blocks on the same support plate assembly.

[0011] To facilitate protection of the test device when it is stationary, a lid is hinged to the upper opening of the test box, and a gas strut is hinged to the outside of the test box. The output end of the gas strut is hinged to the outside of the lid.

[0012] To facilitate the movement of the testing device and ensure stability during testing, the test box is equipped with self-locking casters at the four corners of its bottom, and adjustable feet are provided on one side of each caster.

[0013] To facilitate the storage of the flat tubes to be tested, a storage box capable of accommodating the flat tubes is provided on one side of the test box.

[0014] To facilitate the control of the drive device and the liquid supply device, a control host is provided on one side of the test box. The control host is electrically connected to the drive device and the liquid supply device and can control the opening and closing of the drive device and the liquid supply device.

[0015] The beneficial effects of this utility model are as follows: This utility model is a flat tube burst testing device. Compared with the shortcomings of traditional round tube testing devices, such as insufficient adaptability, the need for sealing rings and complex operation of dedicated testing devices, and the need for precise operation to connect the flat tube to the collection chamber, this device achieves rapid fixation through the clamping structure of the driving device and the clamping block. The driving device pushes the sliding clamping block to abut against the fixed clamping block, eliminating the need for additional sealing rings or other components, thus completing the sealing and fixation of the flat tube end. This greatly simplifies the operation steps and shortens the test preparation time. At the same time, the spray needle extends directly between the two clamping blocks, solidifying the flat tube. Once set, it can precisely align with the nozzle, eliminating the need for tedious alignment operations, reducing operational difficulty, improving batch testing efficiency, and solving the problems of cumbersome and time-consuming operation of existing devices. The two support plate assemblies can slide along the mounting guide rail and be fixed in any position, and the spacing can be flexibly adjusted according to the length of the flat tube to adapt to the testing needs of flat tubes of different lengths and specifications. This breaks the limitation of existing devices that can only test flat tubes of a single length. The pressure grooves on the opposite side of the clamping block can enhance the fit and sealing effect of the flat tube, ensure uniform pressure application, improve the accuracy of test data, and avoid detection errors caused by poor sealing or uneven pressure. Attached Figure Description

[0016] The advantages and solutions of this application will become clear to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this invention.

[0017] In the attached diagram: Figure 1 This is a schematic diagram of the overall structure of this solution; Figure 2 This is a lateral cross-sectional view of the proposed scheme; Figure 3 This is a schematic diagram of the internal structure of the test chamber; Figure 4 This is a partial top view of the plan; Figure 5 This is a magnified view of point A; Figure 6 This is a schematic diagram of the clamping block and the spray needle; Figure 7 This is a schematic diagram of an arc-shaped groove structure; The components represented by the various reference numerals in the diagram are: 1. Test chamber; 2. Mounting rail; 3. Support plate assembly; 4. Clamping block; 5. Nozzle; 6. Liquid supply device; 7. Spray needle; 8. Slider; 9. Telescopic cylinder; 10. Trapezoidal groove; 11. Connecting block; 12. Collection box; 13. Leakage mesh plate; 14. Connecting pipe; 15. Pressure boosting tank; 16. Box cover; 17. Gas strut; 18. Self-locking caster wheel; 19. Adjustable feet; 20. Storage box; 21. Control host; 22. Arc groove; 23. Connecting seat; 24. Guide column; 25. Sliding block; 26. Push block. Detailed Implementation

[0018] Exemplary embodiments of this disclosure will now be described in more detail with reference to the accompanying drawings.

[0019] Example As mentioned in the background section, burst testing is required during the production of flat tubes to ensure their strength. However, existing burst testing devices are usually only designed for round tubes and are not suitable for the planar cross-section structure of flat tubes, resulting in poor sealing during the test. Moreover, even if there are existing dedicated flat tube testing devices, the operation steps during the test are cumbersome and cannot be adapted to testing flat tubes of various sizes, making them impractical. Therefore, the inventors have innovated and designed a new type of flat tube burst testing device, which will be explained in detail below with reference to the illustrations.

[0020] This embodiment discloses a flat tube burst testing device, aiming to solve the problems of existing testing devices having limited compatibility with flat tube sizes, complex sealing operations, and low testing efficiency. Through an adjustable clamping structure, integrated liquid supply design, and circulation system, it achieves efficient and accurate burst testing of aluminum flat tubes of various specifications, meeting the production quality testing needs of aluminum flat tubes used in automotive and household air conditioner condensers. Specifically, it is described below, in conjunction with... Figure 1 and Figure 2 The device uses a test chamber 1 with an open top as its main frame. The test chamber 1 is made of welded stainless steel, which is both corrosion-resistant and impact-resistant. Self-locking casters 18 are installed at the four corners of the bottom for easy movement of the entire device. Adjustable feet 19 are provided on one side of the casters. After moving to the target position, the adjustable feet 19 are turned to support the ground, ensuring the device is stable and does not wobble during the test. A cover 16 is hinged to the top opening of the test chamber 1. The cover 16 can be flipped and closed to cover the opening, preventing high-pressure liquid from splashing during the test and also protecting the inside of the test chamber 1. A gas strut 17 is also hinged to the outside of the test chamber 1. The output end of the gas strut 17 is hinged to the outside of the cover 16, which can assist in opening and closing the cover 16 and avoid inconvenience or collision damage caused by the weight of the cover 16 when manually flipping it. The test box 1 has a storage box 20 welded on one side for storing flat tubes to be tested. The storage box 20 is a rectangular box with an opening at the top. Different specifications of aluminum flat tubes can be placed in layers inside, which is convenient for operators to use and improves the continuity of testing.

[0021] In this embodiment, two parallel mounting rails 2 are bolted to the front and rear inner walls of the test chamber 1 near the upper opening. The mounting rails 2 are T-shaped rails extending along the length of the test chamber 1. Two opposing support plate assemblies 3 are mounted on the mounting rails 2, with sliders 8 welded to the bottom of both ends. The sliders 8 are adapted to the mounting rails 2 and can slide along the rails. The sliders 8 drive the support plate assemblies 3 to adjust their position within the test chamber 1 to accommodate the testing requirements of flat tubes of different lengths. To fix the support plate assemblies 3, fastening bolts pass through the steel plates of the support plate assemblies 3 and the sliders 8. After tightening, the sliders 8 and the mounting rails 2 are firmly locked together, preventing the support plate assemblies 3 from shifting during the test.

[0022] Based on the above structure, combined with Figure 4 and Figure 5 Each support plate assembly 3 is equipped with two sets of clamping blocks 4 for holding flat tubes. The clamping blocks 4 are made of high-strength wear-resistant alloy. Of the two clamping blocks 4 on the same support plate assembly 3, one is fixedly connected to the support plate assembly 3, and the other is slidably connected to the support plate assembly 3 via a slide rail. The sliding clamping block 4 is connected to the drive device. The drive device is a hydraulic telescopic cylinder 9, and the optional model is ISD40*40-BC. The cylinder body is fixed to the support plate assembly 3 via a bracket. The output end of the telescopic cylinder 9 faces the fixed clamping block 4. The sliding clamping block 4 has a trapezoidal groove 10 at the end near the telescopic cylinder 9. A connecting block 11 adapted to the trapezoidal groove 10 is welded to the output end of the telescopic cylinder 9. When the telescopic cylinder 9 is activated, it can push the sliding clamping block 4 closer to or further away from the fixed clamping block 4 to clamp and release the two ends of the flat tube. At the same time, the middle of the opposite side of the two clamping blocks 4 is provided with a pressure-boosting groove 15 from top to bottom. The pressure-boosting groove 15 is a rectangular groove that can form a close seal with the surface of the flat tube when clamped, thereby improving the stability of pressure transmission and preventing high-pressure liquid leakage.

[0023] To achieve rapid liquid supply and burst testing of the flat tube, combined with Figures 3-5 One of the support plate groups 3 has a nozzle 5 installed inside the test chamber 1 on its outer side. This nozzle is connected to the liquid supply device 6 inside the test chamber 1 via a pipe. The liquid supply device includes a high-pressure water pump, a storage tank, and a pressure sensor. An existing high-pressure liquid supply device 6 can be used, so further details are omitted. The liquid supply device 6 is connected to the nozzle 5 via a pipe. The nozzle 5 can be an HVV series nozzle, and it is connected to a spray needle 7. The spray needle 7 has a slender structure, with one side curved and the other side flat. Its free end extends between two clamping blocks 4 on the same side. Furthermore, combined with… Figure 6 and Figure 7, an arc-shaped groove is formed on the end face of the pressing block 4 close to the arc-shaped surface of the spray needle 7, and the spray needle 7 can be embedded into the arc-shaped groove 22 when moving to form a sealed fit. A plurality of liquid outlet holes are opened in the spray needle 7 along the length direction, and the caliber of the spray needle 7 is adapted to the port of the flat tube, ensuring that high-pressure liquid is evenly injected into the flat tube.

[0024] Furthermore, based on the above structure, in order to realize rapid liquid supply and sealing for the flat tube, a connecting seat 23 is provided on the connecting plate assembly provided with the spray needle 7. The connecting seat 23 is located outside the pressing block 4 on the corresponding side, and a horizontal guide post 24 is fixedly connected to a side of the connecting seat 23 close to the pressing block 4. A sliding block 25 is slidably sleeved on the guide post 24, the sliding block 25 is a rectangular block, the spray needle 7 is installed on the inner side thereof, and the nozzle 5 is connected to the outer side thereof. The spray needle 7 and the inside of the nozzle 5 are communicated, so that high-pressure liquid can be conveyed into the flat tube.

[0025] In order to realize linkage control between the spray needle 7 and the movable pressing block 4, an L-shaped push block 26 is fixedly connected to the outer side of the movable pressing block 4. A through hole is formed at the longer end of the push block 26, the push block 26 is sleeved on the guide post 24 and can slide along the guide post 24, and the shorter end of the push block 26 is arranged towards the sliding block 25. When the telescopic cylinder 9 pushes the pressing block 4 to move, the push block 26 moves synchronously, the shorter end of the push block 26 will push the sliding block 25 to slide along the guide post 24 towards the other pressing block 4, thereby driving the spray needle 7 inserted into the flat tube to be embedded into the arc-shaped groove 22. The arc-shaped surface of the spray needle 7 presses one side of the flat tube into the arc-shaped groove 22, and the planar side of the spray needle 7 fits against the inner wall on the other side of the flat tube, so that the spray needle 7 fits more closely with the flat tube, no additional sealing ring is required, and the operation process is simplified.

[0026] In addition, a collection tank 12 is provided at the lower part inside the test box 1, the collection tank 12 is a rectangular tank with an open upper end, which is used to receive liquid sprayed out during the test. A liquid leakage mesh plate 13 is laid on the upper end of the collection tank 12, the liquid leakage mesh plate 13 is a stainless steel plate with dense through holes, which can filter broken residues of the flat tube in the tested liquid, avoiding blockage of the circulation system caused by impurities. The bottom of the collection tank 12 is communicated with the liquid storage tank of the liquid supply device 6 through a connecting pipe 14, forming a liquid circulation circuit to realize repeated utilization of the test liquid and reduce test costs.

[0027] In this embodiment, a control host 21 is further provided on one side of the test box 1, the control host 21 is electrically connected to the driving device and the liquid supply device 6 through lines respectively, and serves as the control core of the entire device. A power switch, a parameter adjustment button and a display screen are arranged on the operation panel of the control host 21, which can display test pressure, liquid supply flow and other data in real time. After an operator inputs test parameters through the control panel, the control host 21 can automatically control the expansion and contraction of the telescopic cylinder 9 and the start and stop of the high-pressure water pump, so as to realize an automatic test process and reduce errors caused by human intervention.

[0028] During testing, the operator places both ends of the aluminum flat tube to be tested between the clamping blocks 4 on the two sets of support plates 3, so that the nozzle 7 is inserted into one end of the flat tube. The telescopic cylinder 9 is activated, which pushes the clamping block 4 to move until the flat tube is firmly clamped. At the same time, the push block 26 pushes the sliding block 25 to drive the nozzle 7 to squeeze the side wall of the flat tube into the arc groove 22. At this time, the nozzle 7 is sealed and fitted with the end of the flat tube. The liquid supply device 6 is activated, and high-pressure liquid is injected into the flat tube through the liquid outlet of the nozzle 7. The pressure is continuously increased until the flat tube bursts. The pressure data is recorded, and the test ends.

Claims

1. A flat tube bursting test device, characterized in that, The test box (1) includes an opening at the top, and the front and rear inner walls of the test box (1) near the opening at the top are provided with mounting rails (2). Two support plate groups (3) are installed on the mounting guide rail (2), and the two support plate groups (3) can slide along the mounting guide rail (2) and can be fixed at any position. Two clamping blocks (4) are respectively provided on the two support plate groups (3), and the two clamping blocks (4) are connected to a driving device, which can push the two clamping blocks (4) to collide. A nozzle (5) is provided in the test box (1) outside any support plate group (3), and it is connected to the liquid supply device (6) in the test box (1). The nozzle (5) is connected to a spray needle (7), and the spray needle (7) extends to the space between two clamping blocks (4) on the same side.

2. The flat tube bursting test device according to claim 1, characterized in that, Both ends of the two support plate assemblies (3) are equipped with sliders (8), and are fixed to the mounting rail (2) by fastening bolts passing through the support plate assemblies (3) and sliders (8).

3. The flat tube bursting test device according to claim 1, characterized in that, Any one of the clamping blocks (4) on the same support plate group (3) is fixedly set with it, and the other is slidably set and connected to the drive device, which can push it to move closer to or away from the fixed clamping block (4).

4. The flat tube bursting test device according to claim 3, characterized in that, The driving device includes a telescopic cylinder (9) mounted on the support plate assembly (3). The clamping block (4) has a trapezoidal groove (10) at one end near the telescopic cylinder (9), and the output end of the telescopic cylinder (9) is equipped with a connecting block (11) that is compatible with the trapezoidal groove (10).

5. The flat tube bursting test device according to claim 1, characterized in that, The test box (1) is equipped with a collection box (12) at the bottom and a leakage mesh plate (13) at the top of the collection box (12). The bottom of the collection box (12) is connected to the liquid supply device (6) through a connecting pipe (14).

6. The flat tube bursting test device according to claim 1, characterized in that, On the same support plate group (3), the two clamping blocks (4) on opposite sides each have a pressure groove (15) opened from top to bottom in the middle.

7. The flat tube bursting test device according to claim 1, characterized in that, The test box (1) has a cover (16) hinged at the upper opening, and a gas strut (17) is hinged to the outside of the test box (1). The output end of the gas strut (17) is hinged to the outside of the cover (16).

8. The flat tube bursting test device according to claim 1, characterized in that, The test box (1) is equipped with self-locking casters (18) at the four corners of the bottom, and an adjustable foot cup (19) is provided on one side of the caster.

9. The flat tube bursting test device according to claim 1, characterized in that, The test box (1) has a storage box (20) on one side that can accommodate the flat tube.

10. A flat tube bursting test device according to any one of claims 1-9, characterized in that, The test box (1) is equipped with a control host (21) on one side, and the control host (21) is electrically connected to the drive device and the liquid supply device (6), and can control the opening and closing of the drive device and the liquid supply device (6).

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