A flat tube burst test clamping device

Abstract

The utility model relates to a kind of flat tube burst test clamping devices, including two opposite installation in the base of box, and two bases are all provided with the fixed first clamping block;Base is also provided with the telescopic cylinder of output end towards first clamping block, and output end is equipped with second clamping block, second clamping block can be pushed to move along the direction of approaching or away from first clamping block;Any one first clamping block outside is provided with spray needle, and spray needle extends between first clamping block and second clamping block, can be inserted into the flat tube to be tested, the other end of the spray needle is connected nozzle.The device is accurately fixed by double base and telescopic cylinder driven clamping structure, first clamping block and second clamping block on two bases are oppositely arranged, telescopic cylinder pushes second clamping block to approach first clamping block, can firmly clamp the both ends of flat tube, avoid wobble deviation in stamping process, improve the authenticity and reliability of burst pressure data.

Description

Technical Field

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

[0002] Aluminum flat tubes are the core load-bearing and heat exchange components of automotive condensers. Thanks to the excellent thermal conductivity, corrosion resistance, and lightweight properties of aluminum alloy, as well as the high-efficiency heat exchange advantages brought by their flat, porous structure, they have become a key component for refrigerant condensation and heat dissipation in automotive air conditioning systems. Their pressure resistance directly determines the operational safety and service life of the condenser. If rupture and leakage occur due to insufficient pressure resistance during use, it will lead to air conditioning system failure and even affect the overall vehicle's operational stability. Therefore, burst testing of aluminum flat tubes is a crucial step in ensuring product quality.

[0003] When conducting flat tube tests, one end of the flat tube is usually sealed and filled with a liquid under certain pressure until the flat tube bursts, thus completing the burst test. In actual operation, the flat tube has poor stability during the stamping process. It is not clamped and fixed, and it is easy to shake. It cannot truly simulate its usage state. Moreover, the diameter of the flat tube is small, and it is necessary to weld the joint to connect high-pressure water, which is relatively material-intensive and inefficient. Utility Model Content

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

[0005] The technical solution of this utility model is as follows: A flat tube bursting test clamping device is installed inside the box of a bursting device, including two bases installed opposite each other inside the box, and each of the two bases is provided with a fixed first clamping block. The base is also provided with a telescopic cylinder with its output end facing the first clamping block, and a second clamping block is installed at the output end, which can push the second clamping block to move in a direction close to or away from the first clamping block. A spray needle is provided on the outside of any of the first clamping blocks, and the spray needle extends between the first clamping block and the second clamping block, and can be inserted into the flat tube to be tested. The other end of the spray needle is connected to a nozzle.

[0006] The telescopic cylinder is connected to the second clamping block in such a way that a trapezoidal groove is provided from top to bottom at one end of the second clamping block near the telescopic cylinder, and a connecting block adapted to the trapezoidal groove is installed at the output end of the telescopic cylinder.

[0007] A connecting seat is provided on the base on the side with the nozzle, and the first clamping block on the corresponding side of the connecting seat is located on the outside. The connecting seat is provided with a guide post on the side near the nozzle, and a slider is slidably mounted on the guide post. The nozzle and the spray needle are located on the inner and outer sides of the slider and are connected.

[0008] The specific design of the spray needle is such that, in order to facilitate the spray needle entering the flat tube, the spray needle is set as a long strip and has a liquid outlet hole in the extension direction.

[0009] In order to ensure that the spray needle can fit the inner wall of the flat tube and guarantee the seal, the side of the spray needle near the first clamping block is set to be arc-shaped, the other side is flat, and an arc-shaped groove for accommodating the spray needle is opened on the side wall of the first clamping block.

[0010] In order to push the nozzle to squeeze the inner wall of the flat tube into the arc-shaped groove when it is in working condition, a push block is installed on the outside of the second clamping block. The push block is L-shaped, with the longer end of the push block slidably connected to the guide post and the shorter end facing the slider.

[0011] In order to reduce the contact area with the flat tube and thus increase the extrusion pressure, pressure-boosting grooves are provided in the middle of the opposite side of the first clamping block and the second clamping block from top to bottom.

[0012] In order to buffer both ends after the flat tube bursts and avoid excessive impact on the edges of the first and second clamping blocks, buffer slots are provided on the opposite sides of the first and second clamping blocks and near the inner side of the box.

[0013] In order to limit the flat tube, a limiting plate is installed on the inner side of the base, and the limiting plate has a through groove, the vertical center line of which is coplanar with the end face of the first clamping block.

[0014] The beneficial effects of this utility model are as follows: This utility model is a clamping device for flat tube burst testing. Compared with the shortcomings of traditional testing methods, such as the lack of clamping and fixation leading to flat tube swaying, difficulty in simulating real-world usage conditions, and inefficient use of welding joints, this device achieves precise fixation through a double-base and telescopic cylinder-driven clamping structure. The first and second clamping blocks on the two bases are arranged opposite each other. The telescopic cylinder pushes the second clamping block closer to the first clamping block, firmly clamping both ends of the flat tube and preventing swaying and displacement during the stamping process. This ensures that the test environment is consistent with the actual usage conditions, improving the authenticity and reliability of the burst pressure data. At the same time, the nozzle is directly inserted into the flat tube to supply liquid, eliminating the need for welding joints, significantly reducing consumable consumption, shortening test preparation time, and improving batch testing efficiency. The arc-shaped design of the long nozzle matches the arc-shaped groove of the first clamping block, ensuring a tight seal when inserted into the flat tube. The liquid outlet is arranged along the length direction, allowing high-pressure liquid to be injected evenly into the tube, improving the stability of pressure application. In addition, the linkage design of the push block and slider can push the nozzle to accurately insert while clamping the flat tube, simplifying the operation process. Attached Figure Description

[0015] 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.

[0016] In the attached diagram: Figure 1 This is a schematic diagram of the clamping device installation; Figure 2 This is a side view of the clamping device. Figure 3 This is a top view of the clamping device. Figure 4 This is a schematic diagram of the nozzle and the first clamping block; The components represented by the various reference numerals in the diagram are: 1. Box body; 2. Base; 3. First clamping block; 4. Telescopic cylinder; 5. Second clamping block; 6. Spray needle; 7. Nozzle; 8. Trapezoidal groove; 9. Connecting block; 10. Connecting seat; 11. Guide column; 12. Slider; 13. Liquid outlet; 14. Arc groove; 15. Push block; 16. Pressure boosting groove; 17. Buffer groove; 18. Limiting plate; 19. Strip groove. Detailed Implementation

[0017] Exemplary embodiments of this disclosure will now be described in more detail with reference to the accompanying drawings.

[0018] Example As mentioned in the background section, during the production of flat tubes, burst tests are required to ensure their quality. Existing flat tube testing methods involve sealing one end and filling the other end with pressurized fluid. However, in actual operation, the flat tube tends to shake, and the inlet end needs to be welded, which is time-consuming and labor-intensive, affecting the accuracy and efficiency of the burst test results. Therefore, the inventors developed and designed a new type of flat tube testing fixture, which will be explained in detail below with reference to the illustrations.

[0019] This embodiment provides a clamping device for testing the bursting of a flat tube, combined with... Figure 1 This device aims to solve the problems of unstable flat tube fixation and inefficient interface connection materials in traditional flat tube burst testing. Through bidirectional clamping positioning and an integrated 6-needle liquid supply design, it achieves stable clamping and efficient testing of flat tubes. It is suitable for burst pressure testing of small flat tubes such as aluminum flat tubes used in automotive condensers. Its specific structure, core components, and testing process are as follows (see [link]). Figure 1The device is installed inside the casing 1 of the blasting device and is supported by two relatively parallel bases 2. The bases 2 are made of high-strength steel plates and are fixed to the bottom of the casing 1 with bolts to ensure the overall structural stability during the test. Each of the two bases 2 is fixedly equipped with a first clamping block 3, which is a rectangular block structure made of wear-resistant alloy material.

[0020] In this embodiment, combined with Figure 2 and Figure 3 Each base 2 is also equipped with a telescopic cylinder 4, preferably a hydraulic telescopic cylinder 4. The optional model is ISD40*40-BC, which is existing equipment and can be purchased as needed. It provides stable output force. The cylinder body of the telescopic cylinder 4 is fixed to the base 2, with the output end facing the first clamping block 3. A second clamping block 5 is installed at the output end. The second clamping block 5 and the first clamping block 3 are structurally symmetrical. To ensure a firm connection between the second clamping block 5 and the output end of the telescopic cylinder 4 and to ensure even force distribution, a trapezoidal groove 8 is formed from top to bottom at the end of the second clamping block 5 near the telescopic cylinder 4. A connecting block 9, which is adapted to the trapezoidal groove 8, is connected to the output end of the telescopic cylinder 4. The connecting block 9 is embedded in the trapezoidal groove 8. When the telescopic cylinder 4 is activated, it can push the second clamping block 5 along the surface of the base 2 towards or away from the first clamping block 3, achieving bidirectional clamping and releasing of the flat tube.

[0021] Based on the above structure, combined with Figure 3 and Figure 4 A pressure-boosting groove 16 is provided from top to bottom in the middle of the opposite end face of the first clamping block 3 and the second clamping block 5. The pressure-boosting groove 16 is a rectangular groove, which can form local pressure concentration when clamping the flat tube, reduce the contact area with the flat tube, and improve clamping stability. At the same time, a buffer groove 17 is provided on the opposite face of the first clamping block 3 and the subsequent second clamping block 5 near the inner side of the box 1. The buffer groove 17 is an arc-shaped groove, which can prevent the flat tube edge from being damaged due to stress concentration when clamping. After the explosion, due to the overall expansion of the flat tube, the buffer groove 17 can be used to accommodate the flat tube edge and reduce the impact between the flat tube and the edge of the clamping block.

[0022] In this embodiment, a limiting plate 18 is also provided on the inner side of the base 2, that is, on the side where the two bases 2 are opposite. The limiting plate 18 is a vertically arranged rectangular steel plate, and a strip groove 19 is opened through the end face of the plate facing the first clamping block 3. The vertical center line of the strip groove 19 is coplanar with the end face of the first clamping block 3. When the flat tube is placed, both ends can pass through the strip groove 19. The strip groove 19 is used to limit the flat tube laterally, so as to avoid the flat tube from swaying left and right during the test and further improve the clamping stability.

[0023] To achieve rapid liquid supply and sealing of the flat tube, combined with Figure 4One of the bases 2 is equipped with a connecting seat 10, which is located outside the first clamping block 3 on the corresponding side. A horizontal guide post 11 is fixed to the side of the connecting seat 10 near the first clamping block 3. A slider 12 is slidably sleeved on the guide post 11. The slider 12 is a rectangular block, and a long strip-shaped spray needle 6 is installed on its inner side, that is, the side facing the first clamping block 3. A nozzle 7 is connected to its outer side. The nozzle 7 can be an HVV series nozzle. The nozzle 7 is connected to the liquid supply assembly set in the housing 1. The liquid supply assembly adopts a high-pressure water pump, liquid storage tank and other structures. Existing industrial equipment that can provide pressurized liquid is sufficient and will not be described in detail. The spray needle 6 and the nozzle 7 are internally connected, which can deliver high-pressure liquid into the flat tube. The spray needle 6 is designed with an arc shape on one side near the first clamping block 3 and a flat shape on the other side. Correspondingly, the side wall of the first clamping block 3 has an arc groove 14 that matches the arc surface of the spray needle 6. When the spray needle 6 moves, it can be embedded in the arc groove 14 to form a sealed fit. The spray needle 6 has multiple liquid outlet holes 13 along its length to ensure that the high-pressure liquid is evenly injected into the flat tube. Based on the above structure, in order to achieve the linkage control between the spray needle 6 and the second clamping block 5, an L-shaped push block 15 is fixedly connected to the outside of the second clamping block 5. The longer end of the push block 15 has a through hole, is sleeved on the guide post 11 and can slide along the guide post 11, and the shorter end is set towards the slider 12. When the telescopic cylinder 4 pushes the second clamping block 5 to move towards the first clamping block 3, the push block 15 moves synchronously with the second clamping block 5. Its shorter end will push the slider 12 to slide along the guide post 11 towards the first clamping block 3, thereby driving the spray needle 6 inserted into the flat tube to embed into the arc-shaped groove 14 of the first clamping block 3. The arc-shaped surface of the spray needle 6 squeezes one side of the flat tube into the arc-shaped groove 14, and the other side is flat and fits against the inner wall of the other side of the flat tube, so that the spray needle 6 fits better with the flat tube and improves the sealing performance.

[0024] During testing, the operator inserts the aluminum flat tube to be tested through the strip groove 19 of the limiting plate 18, placing both ends between the first clamping block 3 and the second clamping block 5 of the two bases 2 respectively, ensuring that the spray needle 6 is inserted into one end of the flat tube. The telescopic cylinder 4 is activated, pushing the second clamping block 5 towards the first clamping block 3 until the first clamping block 3 and the second clamping block 5 firmly clamp the flat tube. At the same time, the push block 15 pushes the slider 12, causing the spray needle 6 to squeeze the side wall of the flat tube into the arc groove 14. At this time, the spray needle 6 and the end of the flat tube are sealed and fitted. The liquid supply assembly is activated, and high-pressure liquid is injected into the flat tube through the nozzle 7 at the liquid outlet 13 of the spray needle 6. The pressure is continuously increased until the flat tube bursts. The pressure data at the time of bursting is recorded to complete the test.

Claims

1. A flat tube bursting test clamping device, which is installed inside the housing (1) of a bursting device, characterized in that, It includes two bases (2) installed opposite each other inside the housing (1), and each of the two bases (2) is provided with a fixed first clamping block (3); The base (2) is also provided with a telescopic cylinder (4) with its output end facing the first clamping block (3), and a second clamping block (5) is installed at the output end, which can push the second clamping block (5) to move in a direction close to or away from the first clamping block (3); A spray needle (6) is provided on the outside of any of the first clamping blocks (3), and the spray needle (6) extends between the first clamping block (3) and the second clamping block (5) and can be inserted into the flat tube to be tested. The other end of the spray needle (6) is connected to a nozzle (7).

2. The flat tube bursting test clamping device according to claim 1, characterized in that, The second clamping block (5) has a trapezoidal groove (8) from top to bottom at one end near the telescopic cylinder (4), and the output end of the telescopic cylinder (4) is equipped with a connecting block (9) that is compatible with the trapezoidal groove (8).

3. The flat tube bursting test clamping device according to claim 1, characterized in that, A connecting seat (10) is provided on the base (2) on the side where the nozzle (6) is located, and the first clamping block (3) on the corresponding side of the connecting seat (10) is located on the outside. The connecting seat (10) is provided with a guide post (11) on the side near the nozzle (6), and a slider (12) is slidably provided on the guide post (11), and the nozzle (6) and the nozzle (7) are located on the inner and outer sides of the slider (12) and connected.

4. The flat tube bursting test clamping device according to claim 3, characterized in that, The spray needle (6) is elongated and has a liquid outlet hole (13) in the direction of its extension.

5. The flat tube bursting test clamping device according to claim 4, characterized in that, The spray needle (6) is arc-shaped on one side near the first clamping block (3) and flat on the other side, and an arc-shaped groove (14) is provided on the side wall of the first clamping block (3) to accommodate the spray needle (6).

6. The flat tube bursting test clamping device according to claim 5, characterized in that, A push block (15) is installed on the outside of the second clamping block (5), and the push block (15) is set in an L shape. The longer end of the push block (15) is slidably connected to the guide post (11), and the shorter end is set towards the slider (12).

7. The flat tube bursting test clamping device according to claim 1, characterized in that, The first clamping block (3) and the second clamping block (5) each have a pressure groove (16) in the middle of their opposite sides, from top to bottom.

8. The flat tube bursting test clamping device according to claim 1, characterized in that, The first clamping block (3) and the second clamping block (5) are provided with buffer slots (17) on their opposite sides and near the inner side of the box (1).

9. The flat tube bursting test clamping device according to claim 1, characterized in that, The base (2) is equipped with a limiting plate (18) on its inner side, and the limiting plate (18) is provided with a through groove (19) facing through, and the vertical center line of the groove (19) is coplanar with the end face of the first clamping block (3).

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