A transformer radiator testing device

Abstract

The application discloses a kind of transformer radiator testing device, it is related to radiator test technical field, testing device includes test box, test box side is equipped with the material opening for conveying fin;The fin includes support frame, the both sides of support frame are respectively embedded with cover plate, two side cover plates and support frame side wall are enclosed into a sealed cavity with vacuum or low pressure state inside;The both sides of support frame are respectively equipped with at least two groups of infusion hole being communicated with sealed cavity;The upper loading platform of being flush with material opening is fixedly arranged on the outside of test box, the U-shaped upper loading plate for positioning several groups of to-be-tested fins is slidably arranged on the upper loading platform, and the driving module for driving the U-shaped upper loading plate to input or output along the material opening into the test box is connected;The red-brown nitrogen dioxide gas generated during the detection process is easier to observe and locate compared with the bubbles generated by water immersion.

Description

Technical Field

[0001] This invention relates to the field of radiator testing technology, and in particular to a transformer radiator testing device. Background Technology

[0002] Transformer radiators are typically assembled from multiple independent heat sinks. These heat sinks are generally hollow, plate-like structures with internal oil channels. Rigorous quality testing of each heat sink before assembly, especially airtightness testing, is crucial for ensuring the overall reliability of the radiator and the long-term stable operation of the transformer. Currently, the industry commonly uses water immersion leak testing as the primary testing method.

[0003] Existing heat sink testing devices, such as the transformer heat sink single-piece testing device disclosed in Chinese patent document CN115265932B, work on the following principle: a single heat sink is immersed in a water tank using a clamping mechanism, and then gas at a certain pressure is injected into the oil channels inside the heat sink. The presence of air bubbles in the water is then observed manually or through a visual system to determine if a leak exists. Simultaneously, the device can integrate a visual imaging component to inspect the integrity of the surface coating of the heat sink before and after immersion in water. While this method is intuitive and reliable, it still has the following significant drawbacks: Because the testing process requires the entire heatsink to be completely immersed in water, a large amount of moisture will adhere to the surface and complex crevices of the heatsink after testing. If this residual moisture is not thoroughly removed, it can easily damage the surface coating of the heatsink and cause oxidation and corrosion of the metal substrate during subsequent storage or assembly, seriously affecting product lifespan and appearance quality. Therefore, the existing technology process must add a separate drying step after testing, which not only extends the overall production cycle and increases energy consumption and equipment investment, but also introduces new risks of impact and contamination during transfer and drying.

[0004] Existing technology employs a single-station, one-by-one testing model. Each heat sink must undergo a complete cycle of "loading - clamping - immersion in water - pressure holding and observation - water draining - unloading." Significant auxiliary time (such as clamping and positioning, lifting and immersion in water, and drainage and observation) cannot be effectively utilized, resulting in very low test throughput per unit time. With the increasing production capacity of transformers, this serial testing mode has become an efficiency bottleneck in the production process, restricting overall production speed. Summary of the Invention

[0005] This invention provides a transformer radiator testing device, which can solve the following problems existing in the prior art: 1) The post-testing processing is cumbersome, requiring secondary drying and posing quality risks; 2) The testing efficiency is low and cannot meet the pace of mass production.

[0006] A transformer radiator testing device includes a test chamber, wherein a material inlet for conveying heat sink fins is provided on one side of the test chamber. The heat sink includes a support frame, with cover plates embedded on both sides of the support frame. The cover plates and the side walls of the support frame together form a sealed cavity with an internal vacuum or low pressure state. At least two sets of infusion holes communicating with the sealed cavity are opened on both sides of the support frame. The test chamber is equipped with a loading platform that is flush with the material inlet. A U-shaped loading plate for positioning several groups of heat sinks to be tested is slidably mounted on the loading platform. The U-shaped loading plate is connected to a drive module that drives it to input or output into the test chamber along the material inlet. The test chamber is also equipped with a first gas delivery module for introducing nitric oxide gas into the sealed cavity of the heat sink and a second gas delivery module for delivering oxygen into the test chamber.

[0007] Preferably, baffles are provided on both sides of the U-shaped feeding plate, and the baffles on both sides and the U-shaped feeding plate together form a positioning cavity for feeding heat sinks.

[0008] Preferably, the first gas delivery module includes multiple gas delivery boxes symmetrically arranged on both sides of the positioning cavity, and each gas delivery box is slidably connected to the baffle plate. Among them, the two sides of the gas supply box are respectively provided with gas supply end heads that are inserted and matched with the liquid supply hole, and the two side baffles are connected to the adjustment mechanism that drives them to move closer to each other or further away from each other.

[0009] Preferably, the drive module includes a translation mechanism fixed to one side of the loading platform. The drive end of the translation mechanism is rotatably mounted on a support shaft, and two sets of drive plates are symmetrically fixedly mounted on the support shaft. The other end of the drive plate is fixedly connected to the U-shaped loading plate.

[0010] Preferably, gears are symmetrically fixed on both sides of the support shaft; Among them, racks for meshing with gears are fixedly arranged on both sides of the end of the loading platform away from the test box.

[0011] Preferably, the U-shaped feeding plate is provided with a sealing plate on the side away from the test chamber. The length of the sealing plate is greater than the length of the feeding port, and a through groove for sliding through the drive plate is provided on the sealing plate. The sealing plate and the U-shaped feeding plate are respectively provided with magnetic sheets on the side that are close to each other, and the magnetic poles of the two magnetic sheets are opposite.

[0012] Preferably, the adjusting mechanism includes a bidirectional screw that is rotatably mounted on the sealing plate, one end of the bidirectional screw being fixed to the output end of an adjusting motor fixed on the sealing plate, and nuts being screwed onto both sides of the bidirectional screw. The sealing plate has symmetrical adjustment grooves on both sides. The nut is fixedly connected to the baffle plate through the adjustment plate through the adjustment groove. The adjustment plate slides and fits against the groove wall.

[0013] Preferably, several sets of inclined guide grooves are respectively opened on the baffle plates on both sides, and the angle between each inclined guide groove and the horizontal plane increases from bottom to top. Each inclined guide groove is provided with a limiting pin, and each limiting pin is fixed to the air supply box. The width of the opening of each inclined guide groove is smaller than the diameter of the limiting pin.

[0014] Preferably, the test chamber is symmetrically equipped with air supply plates, each with a cavity, and the cavities of the two air supply plates are connected by an air inlet pipe. The gas delivery box has air holes at its end, and several sets of air nozzles that are connected to the air holes on each gas delivery box are fixedly arranged on the gas delivery plate. A gas pump for delivering nitric oxide gas is set at the bottom of the test box. One end of the gas pump is connected to the air inlet pipe, and the other end is connected to the nitric oxide storage tank.

[0015] Preferably, the second gas delivery module includes an oxygen port located at the bottom of the test chamber, and the oxygen port is connected to an oxygen storage tank via an air pump; The oxygen port is provided with an air extraction port on one side, and the air extraction port is connected to the gas storage tank through a negative pressure pump.

[0016] This invention provides a transformer radiator testing device, which has the following advantages: 1) After the heat sink is delivered into the test chamber, the present invention first delivers nitric oxide gas into the sealed cavity of the heat sink through the first gas delivery module, and then delivers oxygen into the test chamber through the second gas delivery module. When the heat sink leaks, the nitric oxide gas is output from the sealed cavity of the heat sink and reacts with the oxygen present in the test chamber to produce nitrogen dioxide gas. Nitrogen dioxide gas is reddish-brown. The present invention can determine the location of the leak by observing where the reddish-brown gas is produced on the heat sink. Based on this, compared with the prior art of using water immersion to test the airtightness of the heat sink, this embodiment uses gas detection, which does not require the treatment of moisture on the surface of the heat sink after testing, further improving the detection efficiency. In addition, in the prior art, the heat sink needs to be flipped during the testing process, which will generate a certain amount of bubbles. Based on this, the reddish-brown nitrogen dioxide gas generated during the testing process of the present invention is easier to observe and locate than the bubbles generated by water immersion. 2) Before placing the heat sink to be tested into the positioning cavity, the adjusting mechanism adjusts the two gas supply boxes to be in a back-to-back state. At this time, the baffle plate is not attached to the side edge of the U-shaped feeding plate. After the heat sink is placed into the positioning cavity, the adjusting mechanism drives the two gas supply boxes to move closer to each other so that the gas supply end on the gas supply box is inserted into the liquid inlet. At this time, the baffle plate is attached to the side edge of the U-shaped feeding plate. Based on this, when nitric oxide gas is input into the gas supply box, the nitric oxide gas can be delivered to the sealed cavity of the heat sink in sequence through the gas supply end and the liquid inlet. In this embodiment, a pressure sensor can be installed in the sealed cavity of the heat sink to monitor the gas pressure in the sealed cavity of the heat sink. The filling pressure can be sufficient to meet the pressure required for actual testing. This is not limited. Correspondingly, after the test is completed, if no leakage occurs, the nitric oxide gas in the sealed cavity can be extracted again for recycling. 3) In this invention, when the U-shaped feeding plate is located outside the test chamber, the sealing plate and the U-shaped feeding plate are tightly attached due to the magnetic attraction between the magnetic sheet on the U-shaped feeding plate and the sealing plate. When the driving module drives the U-shaped feeding plate to move into the test chamber along the material port, the sealing plate can stay outside the material port and achieve the effect of sealing the material port because the sealing plate cannot pass through the material port. The oxygen in the test chamber and the leaked nitric oxide or nitrogen dioxide gas will not diffuse into the outside air from the material port and cause pollution. Correspondingly, when the U-shaped feeding plate moves away from the test chamber, it can push the sealing plate to move simultaneously. Attached Figure Description

[0017] Figure 1 A three-dimensional structural diagram of a transformer radiator testing device provided by the present invention. Figure 1 ; Figure 2 A three-dimensional structural diagram of a transformer radiator testing device provided by the present invention. Figure 2 ; Figure 3 This is a side view of a transformer radiator testing device provided by the present invention. Figure 4 A cross-sectional structural diagram of a transformer radiator testing device provided by the present invention; Figure 5 This is a schematic diagram of the baffle plate in a transformer radiator testing device provided by the present invention; Figure 6 A cross-sectional view of the U-shaped feeding plate in a transformer radiator testing device provided by the present invention; Figure 7 This is a schematic diagram of the structure of a U-shaped feeding plate rotated 90 degrees in a transformer radiator testing device provided by the present invention; Figure 8This invention provides a schematic diagram of the structure of a heat sink in a transformer radiator testing device. Figure 9 This is a schematic diagram of the gas delivery box in a transformer radiator testing device provided by the present invention; Figure 10 This is a schematic diagram of the inclined guide groove in a transformer radiator testing device provided by the present invention.

[0018] Explanation of reference numerals in the attached figures: 1. Test chamber; 2. Sealing plate; 3. Sealing door; 4. Translation mechanism; 5. Adjustment motor; 6. Gas supply plate; 7. Heat sink; 8. Gas supply box; 101. Feeding platform; 102. Feed port; 103. Rack; 104. Moving mechanism; 105. Oxygen port; 106. Exhaust port; 107. Camera mechanism; 201. Through slot; 202. U-shaped feeding plate; 203. Magnetic sheet; 204. Adjusting groove; 205. Inclined guide groove; 206. Baffle plate; 207. Adjusting plate; 401. Support shaft; 402. Gear; 403. Drive plate; 501. Double-acting screw; 502. Nut; 601. Air nozzle; 602. Air inlet pipe; 701. Support frame; 702. Liquid inlet; 703. Cover plate; 801. Air hole; 802. Air inlet end; 803. Limit pin. Detailed Implementation

[0019] The specific embodiments of the present invention will be described in detail below, but it should be understood that the scope of protection of the present invention is not limited to the specific embodiments. Example 1

[0020] like Figures 1 to 5 As shown, an embodiment of the present invention provides a transformer radiator testing device, including a test chamber 1. A material inlet 102 for conveying heat sink 7 is provided on one side of the test chamber 1. In this embodiment, when performing a sealing test on the heat sink 7, the heat sink 7 can be conveyed into the test chamber 1 through the material inlet 102. After the test is completed in the test chamber 1, it can be output through the material inlet 102.

[0021] It should be noted that you can refer to Figure 8 In this embodiment, the heat sink 7 includes a support frame 701, and cover plates 703 are respectively embedded on both sides of the support frame 701. The cover plates 703 and the side walls of the support frame 701 together form a sealed cavity with a vacuum or low pressure inside. At least two sets of liquid inlet holes 702 communicating with the sealed cavity are respectively opened on both sides of the support frame 701. Specifically, one side liquid inlet hole 702 is used for liquid inlet, and the other side liquid inlet hole 702 is used for liquid outlet. By coordinating liquid inlet and liquid outlet, the effect of circulating and transporting coolant is achieved.

[0022] The heat sink 7 also includes a capillary structure disposed on the inner wall of the sealed cavity, the capillary structure covering the inner surface of the two sets of cover plates 703; and a small amount of working medium encapsulated in the sealed cavity; specifically, when the heat source acts on one side cover plate 703, the working medium in the cavity absorbs heat and evaporates into steam in the heated area, the steam diffuses in the cavity to the area of ​​the lower temperature upper cover plate 703, condenses and releases latent heat and returns to liquid, and the condensed liquid flows back to the heated area under the capillary pumping force generated by the capillary structure, thereby forming an efficient phase change heat transfer cycle.

[0023] Accordingly, the two sets of cover plates 703 in this embodiment can be fixedly connected to the support frame 701 by welding or riveting. In the actual manufacturing process, the connection end between the cover plates 703 on both sides and the support frame 701 is prone to leakage. Therefore, before production, it is necessary to test the sealing performance of each heat sink 7.

[0024] Please refer to Figures 3-7 To simultaneously test multiple sets of heat sinks 7, a loading platform 101 flush with the material inlet 102 is fixedly arranged on the outside of the test chamber 1. A U-shaped loading plate 202 for positioning several sets of heat sinks 7 to be tested is slidably arranged on the loading platform 101. The U-shaped loading plate 202 is connected to a drive module that drives it to input or output along the material inlet 102 into the test chamber 1. It can be noted that in this embodiment, before testing the heat sinks 7, multiple sets of heat sinks 7 are stacked and placed in the U-shaped loading plate 202 for positioning. After positioning, the drive module drives the U-shaped loading plate 202 to enter the test chamber 1 along the material inlet 102. After testing, the drive module drives the U-shaped loading plate 202 to move along the material inlet 102 to the outside of the test chamber 1 to complete the unloading.

[0025] In addition, when the U-shaped feeding plate 202 moves along the feed inlet 102, the top, bottom and side edges of the U-shaped feeding plate 202 slide against the box wall at the feed inlet 102.

[0026] In one embodiment of this invention, the test chamber 1 is further provided with a first gas delivery module for introducing nitric oxide gas into the sealed cavity of the heat sink 7 and a second gas delivery module for delivering oxygen into the test chamber 1. Specifically, after the heat sink 7 is delivered into the test chamber 1, nitric oxide gas is first delivered into the sealed cavity of the heat sink 7 through the first gas delivery module, and then oxygen is delivered into the test chamber 1 through the second gas delivery module. When a leak occurs in the heat sink 7, the nitric oxide gas exits from the sealed cavity of the heat sink 7 and reacts with the oxygen present in the test chamber 1 to produce nitrogen dioxide gas. The gas is reddish-brown. In this embodiment, the location of the leak can be determined by observing where the reddish-brown gas is generated on the heat sink 7. Based on this, compared with the prior art which uses water immersion to test the airtightness of the heat sink 7, this embodiment uses gas detection, which eliminates the need to treat the moisture on the surface of the heat sink 7 after testing, thus further improving the detection efficiency. In addition, in the prior art, the heat sink 7 needs to be flipped during the testing process, which generates a certain amount of bubbles. Therefore, the reddish-brown nitrogen dioxide gas generated during the testing process in this embodiment is easier to observe and locate than the bubbles generated by water immersion. Example 2 Based on Example 1, please refer to Figures 1-6 as well as Figure 9 The U-shaped feeding plate 202 is provided with baffle plates 206 on both sides. The baffle plates 206 on both sides and the U-shaped feeding plate 202 form a positioning cavity for feeding heat sink 7. Specifically, in this embodiment, when feeding heat sink 7, multiple heat sinks 7 can be placed in the positioning cavity for positioning.

[0027] In one embodiment of this invention, the first gas delivery module includes multiple gas delivery boxes 8 symmetrically arranged on both sides of the positioning cavity. Each gas delivery box 8 is slidably connected to a baffle plate 206. On the side of the gas delivery boxes 8 that are close to each other, a gas delivery end 802 is provided that engages with a liquid delivery hole 702. The baffle plates 206 on both sides are connected to an adjustment mechanism that drives them to move closer together or further apart. It can be noted that in this embodiment, before the heat sink 7 to be tested is placed in the positioning cavity, the adjustment mechanism adjusts the gas delivery boxes 8 to be in a state of being further apart. At this time, the baffle plate 206 is not in contact with the side edge of the U-shaped loading plate 202. After the heat sink 7 is placed in the positioning cavity, the adjustment mechanism drives the gas delivery boxes 8 to move closer together. The gas delivery end 802 on the gas delivery box 8 is inserted into the liquid delivery hole 702. At this time, the baffle plate 206 is in contact with the side edge of the U-shaped feeding plate 202. Based on this, when nitric oxide gas is input into the gas delivery box 8, the nitric oxide gas can be delivered to the sealed cavity of the heat sink 7 through the gas delivery end 802 and the liquid delivery hole 702 in sequence. In this embodiment, a pressure sensor can be installed in the sealed cavity of the heat sink 7 to monitor the pressure in the sealed cavity of the heat sink 7. The inflation pressure can be sufficient to meet the pressure required for actual monitoring, and there is no limitation on this. Correspondingly, after the test is completed, if no leakage occurs, the nitric oxide gas in the sealed cavity can be extracted again for recycling.

[0028] It should also be noted that the number of air supply boxes 8 on both sides in this embodiment should be consistent, and the specific number of air supply boxes 8 on each side is not limited, as long as it meets the actual application requirements; for example, the number of air supply boxes 8 on each side in this embodiment is seven sets. Based on this, this embodiment can perform airtightness testing on seven sets of heat sinks 7 at one time.

[0029] In this embodiment, please refer to Figures 1-4 The drive module includes a translation mechanism 4 fixed to one side of the loading platform 101. The drive end of the translation mechanism 4 is rotatably mounted with a support shaft 401. Two sets of drive plates 403 are symmetrically fixed on the support shaft 401. The other end of the drive plate 403 is fixedly connected to the U-shaped loading plate 202. It can be noted that the translation mechanism 4 in this embodiment can adopt a synchronous belt drive mechanism. The specific model is not limited in this embodiment. When it is necessary to drive the U-shaped loading plate 202 to translate, the support shaft 401 can be driven to move through the translation mechanism 4. The support shaft 401 can synchronously drive the U-shaped loading plate 202 to translate along the loading platform 101 through the drive plate 403.

[0030] To facilitate the loading of the stacked heat sinks 7 into the U-shaped loading plate 202, in this embodiment, please refer to... Figures 1-5 as well as Figure 7Gears 402 are symmetrically fixed on both sides of the support shaft 401. Racks 103 for meshing with the gears 402 are also fixed on both sides of the end of the loading platform 101 away from the test chamber 1. It can be explained that during the movement of the U-shaped loading plate 202 along the loading platform 101 away from the test chamber 1, as the U-shaped loading plate 202 moves to the side edge of the loading platform 101, the gears 402 on the support shaft 401 mesh with the racks 103. When the U-shaped loading plate 202 continues to move, the gears 402 drive the support shaft 401 to rotate by meshing with the racks 103. The support shaft 401, through the drive plate 403, can drive the U-shaped loading plate 202 to rotate 90 degrees (see reference). Figure 7 This allows the open end of the U-shaped feeding plate 202 to face upwards, making it easier to place the stacked heat sink 7.

[0031] In another embodiment of this invention, during the airtightness test of the heat sink 7, as the U-shaped feeding plate 202 moves into the test chamber 1, to prevent oxygen or leaked nitric oxide and nitrogen dioxide gases from entering the test chamber 1 from diffusing into the air, a sealing plate 2 is provided on the side of the U-shaped feeding plate 202 away from the test chamber 1. The length of the sealing plate 2 is greater than the length of the inlet 102. A through groove 201 for sliding through the drive plate 403 is provided on the sealing plate 2. Magnetic sheets 203 are respectively provided on the side of the sealing plate 2 that is close to the U-shaped feeding plate 202, and the magnetic poles of the two magnetic sheets 203 are opposite. It can be noted that the U-shaped feeding plate 202 is located at the test chamber 1. When the U-shaped feeding plate 202 is on the outside of the test chamber 1, the sealing plate 2 and the U-shaped feeding plate 202 are tightly attached due to the magnetic attraction between the U-shaped feeding plate 202 and the magnetic sheet 203 on the sealing plate 2. When the drive module drives the U-shaped feeding plate 202 to move into the test chamber 1 along the material port 102, the sealing plate 2 can stay outside the material port 102 and achieve the effect of sealing the material port 102. The oxygen in the test chamber 1 and the leaked nitric oxide or nitrogen dioxide gas will not diffuse into the outside air from the material port 102 and cause pollution. Correspondingly, when the U-shaped feeding plate 202 moves away from the test chamber 1, it can push the sealing plate 2 to move synchronously.

[0032] In this embodiment, the adjustment mechanism includes a bidirectional screw 501 rotatably mounted on the sealing plate 2. One end of the bidirectional screw 501 is fixed to the output end of the adjustment motor 5 fixed on the sealing plate 2. Nuts 502 are screwed onto both sides of the bidirectional screw 501. Adjustment grooves 204 are symmetrically opened on both sides of the sealing plate 2. The nuts 502 are fixedly connected to the baffle plate 206 through the adjustment grooves 204 via adjustment plates 207. The adjustment plates 207 slide against the groove wall of the adjustment grooves 204. It can be noted that in this embodiment, when the baffle plates 206 on both sides move closer or further apart, the bidirectional screw 501 can be driven to rotate by the adjustment motor 5. During the process of the nuts 502 on both sides moving closer or further apart on the bidirectional screw 501, the baffle plates 206 can be moved synchronously by the adjustment plates 207 to adjust the relative position of the baffle plates 206 on both sides. It should also be noted that when the two baffle plates 206 move toward each other to their limit positions, the adjusting plate 207 moves within the adjusting groove 204 to fit against the side edge of the groove wall. Thus, the adjusting plate 207 can achieve the effect of sealing the adjusting groove 204, preventing gas in the test chamber 1 from leaking out through the adjusting groove 204.

[0033] As a further aspect of this embodiment, during the airtightness testing of the heat sink 7, since the heat sink 7 is stacked in the positioning cavity during loading, the two sets of adjacent heat sink 7 are tightly fitted together. Therefore, the connection between the cover plate 703 on the two sets of adjacent heat sink 7 and the support frame 701 is in a sealed state. Even if there is leakage, the test cannot be completed. Based on this, please refer to... Figures 5-6 as well as Figure 10 In this embodiment, several sets of inclined guide grooves 205 are respectively opened on the two side baffles 206. The angle between each inclined guide groove 205 and the horizontal plane increases from bottom to top. Each inclined guide groove 205 is provided with a limiting pin 803 rolling inside it. Each limiting pin 803 is fixed to the gas delivery box 8. The width of the groove opening of each inclined guide groove 205 is smaller than the diameter of the limiting pin 803. It can be explained that after the drive module drives the U-shaped feeding plate 202 to move to the test box 1, as the sealing plate 2 is restricted to the outside of the material inlet 102, the two side baffles 206 also stop moving. When the drive module continues to drive the U-shaped feeding plate 202 to move, based on the limiting effect of the inclined guide grooves 205, each limiting pin 803 can drive each gas delivery box 8 to move along the inclined guide grooves 205, so as to drive each gas delivery box 8 to diffuse with each other, thereby achieving the effect of adjusting the spacing of each gas delivery box 8, which is convenient for subsequent detection and observation.

[0034] In addition, a camera mechanism 107 is provided inside the test chamber 1. The camera mechanism 107 is connected to the drive end of the moving mechanism 104 arranged inside the test chamber 1. Specifically, the moving mechanism 104 can adopt a synchronous belt structure to drive the camera mechanism 107 to reciprocate inside the test chamber 1, thereby facilitating the monitoring of whether each heat sink 7 has leakage.

[0035] Specifically, the camera mechanism 107 in this embodiment can adopt existing technology. This embodiment does not limit its specific model and structure, as long as it meets the actual application requirements.

[0036] It should also be noted that in this embodiment, by setting an air delivery end 802 on the air delivery box 8, and inserting the air delivery end 802 into the liquid delivery hole 702, not only can the air delivery effect be achieved, but it can also be used to position and fix the heat sink 7. As the air delivery box 8 moves, the heat sink 7 can be driven to move synchronously. In this embodiment, there is no need to set other clamping equipment to clamp the heat sink 7, which reduces the cost.

[0037] To ensure that each heat sink 7 can diffuse stably within the U-shaped feeding plate 202, the inner height of the U-shaped feeding plate 202 is greater than the thickness of the stacked heat sinks 7.

[0038] In order to introduce nitric oxide gas into each gas delivery box 8, in this embodiment, please refer to... Figures 2-3 The test chamber 1 is symmetrically equipped with gas supply plates 6, each with a cavity. The cavities of the two gas supply plates 6 are connected by an air inlet pipe 602. Each end of the gas supply box 8 has an air hole 801. Several sets of air nozzles 601 are fixedly arranged on the gas supply plates 6, which are inserted into the air holes 801 on each gas supply box 8. A gas pump for supplying nitric oxide gas is installed at the bottom of the test chamber 1. One end of the gas pump is connected to the air inlet pipe 602, and the other end is connected to a nitric oxide storage tank. It can be explained that after the drive module of this embodiment inputs each heat sink 7 to be tested into the test chamber 1, the air holes 801 at the ends of each heat sink 7 are inserted into the air nozzles 601 on the gas supply plates 6. The gas pump can input nitric oxide gas into the cavity of the gas supply plate 6 through the air inlet pipe 602, and then deliver the nitric oxide gas to the gas supply box 8 through the air nozzles 601 and air holes 801, thus achieving the gas supply effect.

[0039] In this embodiment, please refer to Figure 2The second gas delivery module includes an oxygen port 105 located at the bottom of the test chamber 1. The oxygen port 105 is connected to an oxygen storage tank via an air pump. An exhaust port 106 is provided on one side of the oxygen port 105, and the exhaust port 106 is connected to the storage tank via a negative pressure pump. It can be explained that when the heat sink 7 moves to the test chamber 1, as the sealing plate 2 closes the material port 102, this embodiment can perform vacuum treatment on the test chamber 1 through the negative pressure pump and the exhaust port 106, and then input oxygen into the test chamber 1 through the oxygen port 105 via the air pump to create a pure oxygen environment. This facilitates the rapid contact and reaction of oxygen with the nitric oxide leaking from the heat sink 7 to generate nitrogen dioxide, thereby improving detection efficiency and accuracy.

[0040] In the absence of testing, to seal the feed inlet 102 and prevent external dust from entering the test chamber 1, this embodiment can be referred to... Figures 1-3 A sealing door 3 is rotatably arranged in the material inlet 102. It can be explained that when the drive module drives the U-shaped feeding plate 202 to move in the direction of the material inlet 102, it can push the sealing door 3 to rotate in the test chamber 1 to achieve the effect of opening the material inlet 102. Correspondingly, after the test is completed, as the U-shaped feeding plate 202 resets, the sealing door 3 can be reset synchronously under the action of gravity.

[0041] A test method for a transformer radiator testing device includes the following steps: Please see Figures 1-4 as well as Figure 8 S1. Stack and stack multiple heat sinks 7 and place them into the U-shaped feeding plate 202 for positioning. S2. After positioning is completed, the drive module drives the U-shaped feeding plate 202 to enter the test chamber 1 along the material port 102. S3. The first gas delivery module delivers nitrogen oxide gas into the sealed cavity of the heat sink 7. S4. The second gas delivery module delivers oxygen into the test chamber 1. When the heat sink 7 leaks, nitrogen monoxide gas is output from the sealed cavity of the heat sink 7 and reacts with the oxygen present in the test chamber 1 to produce reddish-brown nitrogen dioxide gas, which can be used to determine the leak.

[0042] The above-disclosed embodiments are merely a few specific examples of the present invention. However, the embodiments of the present invention are not limited thereto, and any variations that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A transformer radiator testing device, comprising a test chamber (1), characterized in that, The test chamber (1) has a material inlet (102) on one side for conveying the heat sink (7). The heat sink (7) includes a support frame (701), and cover plates (703) are respectively embedded on both sides of the support frame (701). The cover plates (703) and the side walls of the support frame (701) together form a sealed cavity with a vacuum or low pressure inside. At least two sets of infusion holes (702) communicating with the sealed cavity are respectively opened on both sides of the support frame (701). The test box (1) is fixedly provided with a loading platform (101) that is flush with the material inlet (102) on the outside. A U-shaped loading plate (202) for positioning several groups of heat sinks (7) to be tested is slidably provided on the loading platform (101). The U-shaped loading plate (202) is connected to a drive module that drives it to input or output along the material inlet (102) into the test box (1). The test chamber (1) is also equipped with a first gas delivery module for inputting nitric oxide gas into the sealed cavity of the heat sink (7) and a second gas delivery module for supplying oxygen into the test chamber (1).

2. The transformer radiator testing device as described in claim 1, characterized in that, The U-shaped feeding plate (202) is provided with baffles (206) on both sides. The baffles (206) on both sides and the U-shaped feeding plate (202) together form a positioning cavity for feeding the heat sink (7).

3. The transformer radiator testing device as described in claim 2, characterized in that, The first gas delivery module includes multiple gas delivery boxes (8) symmetrically arranged on both sides of the positioning cavity, and each gas delivery box (8) is slidably connected to the baffle plate (206); Among them, the two sides of the gas supply box (8) are respectively provided with gas supply end (802) that is inserted and matched with the liquid supply hole (702) on the side that is close to each other, and the two side baffles (206) are connected to the adjustment mechanism that drives them to move closer to each other or further away from each other.

4. The transformer radiator testing device as described in claim 3, characterized in that, The drive module includes a translation mechanism (4) fixed to one side of the loading platform (101). The drive end of the translation mechanism (4) is rotatably arranged with a support shaft (401). Two sets of drive plates (403) are symmetrically fixed on the support shaft (401). The other end of the drive plate (403) is fixedly connected to the U-shaped loading plate (202).

5. The transformer radiator testing device as described in claim 4, characterized in that, Gears (402) are symmetrically fixed on both sides of the support shaft (401). Among them, racks (103) for meshing with gears (402) are fixedly arranged on both sides of the end of the loading platform (101) away from the test box (1).

6. The transformer radiator testing device as described in claim 4, characterized in that, The U-shaped feeding plate (202) is provided with a sealing plate (2) on the side away from the test box (1). The length of the sealing plate (2) is greater than the length of the material inlet (102). A through groove for sliding through the drive plate (403) is provided on the sealing plate (2). Among them, the sealing plate (2) and the side close to the U-shaped feeding plate (202) are respectively provided with magnetic sheets (203), and the magnetic poles of the two magnetic sheets (203) are opposite.

7. The transformer radiator testing device as described in claim 6, characterized in that, The adjustment mechanism includes a bidirectional screw (501) rotatably arranged on the sealing plate (2), one end of the bidirectional screw (501) is fixed to the output end of the adjustment motor (5) fixed on the sealing plate (2), and nuts (502) are screwed on both sides of the bidirectional screw (501). The sealing plate (2) has symmetrical adjustment grooves (204) on both sides. The nut (502) passes through the adjustment groove (204) and is fixedly connected to the baffle plate (206) via the adjustment plate (207). The adjustment plate (207) slides against the groove wall of the adjustment groove (204).

8. The transformer radiator testing device as described in claim 6, characterized in that, Several sets of inclined guide grooves (205) are respectively opened on the baffle plates (206) on both sides. The angle between each inclined guide groove (205) and the horizontal plane increases from bottom to top. Each inclined guide groove (205) is provided with a limiting pin (803) rolling inside. Each limiting pin (803) is fixed to the gas delivery box (8). The width of the groove opening of each inclined guide groove (205) is smaller than the diameter of the limiting pin (803).

9. The transformer radiator testing device as described in claim 3, characterized in that, The test chamber (1) is symmetrically equipped with air supply plates (6), and the air supply plates (6) have cavities. The cavities of the two air supply plates (6) are connected by an air inlet pipe (602). The gas delivery box (8) has an air hole (801) at its end. The gas delivery plate (6) is fixedly provided with a number of air nozzles (601) that are connected to the air holes (801) on each gas delivery box (8). The bottom of the test box (1) is provided with a gas pump for delivering nitric oxide gas. One end of the gas pump is connected to the air inlet pipe (602), and the other end is connected to the nitric oxide storage tank.

10. The transformer radiator testing device as described in claim 1, characterized in that, The second gas delivery module includes an oxygen port (105) located at the bottom of the test chamber (1), and the oxygen port (105) is connected to an oxygen storage tank via an air pump; Among them, an air extraction port (106) is provided on one side of the oxygen port (105), and the air extraction port (106) is connected to the gas storage tank through a negative pressure pump.

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