An automatic loading and unloading heat exchanger tube airtightness detection device

Abstract

This invention relates to the field of pipeline airtightness testing technology, and provides an automatic loading and unloading heat exchanger tube airtightness testing device, comprising a loading component, a testing station, and an unloading component arranged sequentially. The testing station is provided with at least two support plates and a liftable top plate on one side of the support plates. The support plates are provided with a number of support grooves at intervals. The top plate has inclined grooves with the same number of support grooves and a ramp near the unloading component. Both the inclined grooves and the ramp gradually decrease in the direction close to the unloading component. Each time the top plate is raised or lowered, it can transfer one heat exchanger tube on the loading component to the adjacent support groove, and transfer the heat exchanger tube in the support groove to the next adjacent support groove. After testing, the heat exchanger tubes can be transferred to the unloading component in the same manner. This invention can complete automatic loading and unloading through the lifting and lowering action of the top plate, which simplifies the loading and unloading action and the overall structure compared with the prior art.

Description

Technical Field

[0001] This invention relates to the field of pipeline airtightness testing technology, and more specifically, to an automatic loading and unloading heat exchanger tube airtightness testing device. Background Technology

[0002] Heat exchange tubes need to ensure strict airtightness of the tube body to guarantee the effectiveness of the heat exchange medium during operation. Therefore, airtightness testing is required during the manufacturing process of heat exchange tubes. The testing method usually involves placing the heat exchange tube in a liftable testing station, sealing both ends with sealing components, and placing a water tank below the testing station. During testing, pressure is applied to the heat exchange tube through the sealing components while the testing station is immersed in the water tank until the predetermined pressure is reached and then the pressurization is stopped. The pass rate is determined by comparing the real-time air pressure inside the heat exchange tube with the preset pressurization time.

[0003] Currently, in order to improve efficiency and reduce manual intervention, heat exchange tubes are usually automatically loaded and unloaded during airtightness testing. For example, the prior art with publication number "CN118179971A" discloses an automatic airtightness testing device for tubes with loading and unloading. However, in this prior art, the loading and unloading process includes actions such as pushing, lifting and lowering, and moving back and forth, which is cumbersome and the corresponding structure is also relatively complex. Summary of the Invention

[0004] The purpose of this invention is to provide an automatic loading and unloading heat exchange tube airtightness detection device to solve the above-mentioned defects of the prior art.

[0005] This invention is achieved through the following technical solution:

[0006] An automatic loading and unloading heat exchanger tube airtightness testing device includes a loading component, a testing station, and an unloading component arranged sequentially. The loading component is used to transport the heat exchanger tube to the testing station, and the unloading component is used to move the heat exchanger tube away from the testing station. The testing station is provided with at least two support plates and a liftable top plate on one side of the support plates. The support plates are provided with a number of support grooves at intervals. The top plate is provided with inclined grooves with the same number of support grooves and a ramp close to the unloading component. Both the inclined grooves and the ramp gradually decrease in the direction close to the unloading component.

[0007] After the top plate rises, it can cause one heat exchange tube on the feeding component to roll into the bottom of the adjacent inclined groove. After the top plate is reset, it can cause the heat exchange tube to fall into the adjacent support groove. In the future, each time the top plate rises and falls, it can transfer one heat exchange tube on the feeding component to the adjacent support groove, and transfer the heat exchange tube in the support groove to the next adjacent support groove. After the heat exchange tube is tested, it can be transferred to the unloading component in the same way.

[0008] Optionally, the other side of the support plate is provided with a translatable clamping plate. The clamping plate is provided with a first clamping part corresponding to each support groove, and a second clamping part is provided on one side of the support groove. The translation of the clamping plate can clamp and fix the heat exchange tube between the first clamping part and the second clamping part.

[0009] Optionally, the lifting and lowering of the top plate and the translation of the clamping plate are both achieved by cylinders.

[0010] Optionally, both the first clamping part and the second clamping part have a V-shaped structure.

[0011] Optionally, the second clamping part is provided on the side of the support groove near the feeding component, and in the direction of the line connecting adjacent support grooves, the distance between the top of the inclined groove corresponding to the second clamping part and the top of the second clamping part is less than 1 / 2 of the outer diameter of the heat exchange tube.

[0012] Optionally, the top of the second clamping part is provided with a guide slope.

[0013] Optionally, the second clamping part is provided on the side of the support groove near the unloading component, and in the direction of the line connecting adjacent support grooves, the distance between the top of the inclined groove corresponding to the second clamping part and the top of the second clamping part is greater than 1 / 2 of the outer diameter of the heat exchange tube.

[0014] Optionally, both the feeding component and the unloading component are guide frames, and the top surface of the guide frame has an inclined guide surface.

[0015] Optionally, both the feeding component and the unloading component are provided with a baffle block at their ends.

[0016] Optionally, limiting components are provided on both sides of the feeding component and both sides of the unloading component to limit the position of the two ends of the heat exchange tube.

[0017] The technical solution of the present invention has at least the following advantages and beneficial effects:

[0018] During feeding, the top plate rises, and the inclined chute near the feeding component lifts one of the heat exchange tubes on the feeding component. Under the action of gravity, the heat exchange tube rolls into the bottom of the inclined chute. Then the top plate (descends) resets. Without the support of the top plate, the heat exchange tube in the inclined chute falls into the support groove near the feeding component. The top plate rises again, and the heat exchange tube in the support groove near the feeding component is lifted by the next inclined chute on the top plate. At the same time, another heat exchange tube on the feeding component falls into the inclined chute near the feeding component. After the top plate (descends) resets, the heat exchange tube in the support groove near the feeding component is transferred to the next support groove. At the same time, the heat exchange tube in the inclined chute near the feeding component falls into the support groove near the feeding component.

[0019] Each time the top plate rises and falls, a heat exchange tube on the feeding component falls into the support slot near the feeding component. Simultaneously, a heat exchange tube in the previous support slot is transferred to the next adjacent support slot, until each support slot has a heat exchange tube, completing the feeding process. After feeding, an airtightness test is performed. After the test, the top plate rises, lifting the heat exchange tubes in the support slots near the unloading component and rolling them down the ramp to the unloading component. This also lifts a heat exchange tube on the feeding component and others in the support slots. After the top plate (falls down) resets, the tested heat exchange tubes are transferred to the next support slot, while simultaneously feeding the support slots near the feeding component. This process is repeated until all tested heat exchange tubes are transferred to the unloading component, completing the unloading process and simultaneously feeding another batch of heat exchange tubes. Therefore, this invention achieves automatic feeding and unloading through the rising and falling motion of the top plate, simplifying the feeding and unloading actions and the overall structure compared to existing technologies. Attached Figure Description

[0020] Figure 1 A schematic diagram of the structure of an automatic loading and unloading heat exchanger tube airtightness detection device provided by the present invention;

[0021] Figure 2 A schematic diagram showing the positional relationship between the support plate, the top plate, and the clamping plate;

[0022] Figure 3 This is a schematic diagram of the heat exchange tube being clamped and fixed by the first clamping part and the second clamping part in this embodiment;

[0023] Figure 4 This is a schematic diagram of the heat exchange tube being clamped and fixed by the first clamping part and the second clamping part in other embodiments.

[0024] Figure 5 This is a schematic diagram showing the state of heat exchange tubes accumulating on the feeding component before feeding.

[0025] Figure 6 This is a schematic diagram showing the state of the top plate after it is first raised during material feeding;

[0026] Figure 7 for Figure 6 A schematic diagram showing the state of the top plate after it has been reset.

[0027] Figure 8 for Figure 7 A schematic diagram showing the state of the top material plate after it has risen again.

[0028] Figure 9 for Figure 8 A schematic diagram showing the state of the top plate after it has been reset.

[0029] Figure 10 This is a schematic diagram showing the state after the material loading is completed;

[0030] Figure 11 This is a schematic diagram showing the state of the top plate after it first rises during material unloading;

[0031] Reference numerals: 1-Feeding component, 2-Unloading component, 3-Inspection station, 301-Support plate, 3011-Support groove, 3012-Second clamping part, 4-Blocking block, 5-Top plate, 501-Inclined groove, 502-Slope, 6-Clamping plate, 601-First clamping part, 7-Heat exchange tube. Detailed Implementation

[0032] refer to Figure 1 An automatic loading and unloading heat exchanger tube airtightness testing device is disclosed, comprising a loading component 1, a testing station 3, and an unloading component 2 arranged sequentially. It is worth noting that the main improvement of this invention is to the loading and unloading components. The testing station 3 only improves the support method for the heat exchanger tube 7, while the rest of the overall structure remains unchanged. It can support and seal the heat exchanger tube 7, and the testing station 3 is movable and has a water tank below. The testing method also adopts existing methods: the heat exchanger tube 7 is placed in the testing station 3, and both ends are sealed with sealing components. During testing, pressure is applied to the heat exchanger tube 7 through the sealing components, while the entire testing station 3 is immersed in the water tank until a predetermined pressure is reached and pressurization stops. The pass / fail status is determined by comparing the real-time air pressure inside the heat exchanger tube 7 with the preset pressurization time.

[0033] The feeding component 1 is used to transport the heat exchange tube 7 to the testing station 3, and the unloading component 2 is used to move the heat exchange tube 7 away from the testing station 3. Alternatively, in this embodiment, both the feeding component 1 and the unloading component 2 are guide frames with an inclined guide surface on their top surface. It should be understood that in the feeding component 1, the end of the guide surface away from the testing station 3 is higher, and the end closer to the testing station 3 is lower; similarly, in the unloading component 2, the end closer to the testing station 3 is higher, and the end away from the testing station 3 is lower. In this way, the feeding component 1 moves the heat exchange tube 7 closer to the testing station 3 under gravity, and the unloading component 2 moves the heat exchange tube 7 away from the testing station 3 under gravity, eliminating the need for power conveying. In other embodiments, the feeding component 1 and the unloading component 2 can, of course, employ other methods, such as a conveyor.

[0034] As an alternative, both the feeding component 1 and the unloading component 2 are composed of at least two parallel guide frames. In practical applications, the number of guide frames can be set according to the length of the heat exchange tube 7. The longer the heat exchange tube 7, the more parallel guide frames there are.

[0035] Furthermore, in this embodiment, limiting components (not shown in the figure) are provided on both sides of the feeding component 1 and both sides of the unloading component 2 to limit the position of the two ends of the heat exchange tube 7. Specifically, the limiting components can be structures such as baffles to limit the axial displacement of the heat exchange tube 7 and prevent it from rolling off when rolling on the feeding component 1 and the unloading component 2.

[0036] In this embodiment, both the feeding component 1 and the unloading component 2 are provided with baffle blocks 4 at their ends. That is, baffle blocks 4 are provided at the end of the feeding component 1 that is close to the detection station 3 and at the end of the unloading component 2 that is far away from the detection station 3. The function of the baffle blocks 4 is to restrict the heat exchange tube 7 from rolling further, so that the heat exchange tube 7 can stay at this position.

[0037] In this embodiment, the heat exchange tube 7 is supported at the testing station 3 by a fixed support plate 301. Specifically, the testing station 3 is provided with at least two support plates 301. The number of support plates 301 can be increased according to the length of the heat exchange tube 7. The longer the heat exchange tube 7, the more support plates 301 there are. The support plates 301 are provided with a number of support grooves 3011 at intervals. The number of support grooves 3011 is determined according to the size of the testing station 3. The larger the size, the more support grooves 3011 can be provided so that more heat exchange tubes 7 can be tested for air tightness at one time.

[0038] refer to Figure 2 One side of the support plate 301 is provided with a liftable top plate 5. Alternatively, the lifting of the top plate 5 is achieved by a cylinder, that is, the lifting of the top plate 5 is achieved by the extension and retraction of the cylinder. The top plate 5 has inclined grooves 501 in the same number as the support grooves 3011 and a ramp 502 near the unloading component 2. Both the inclined grooves 501 and the ramp 502 gradually decrease in the direction close to the unloading component 2. Alternatively, in this embodiment, the number of support grooves 3011 is five, that is, five heat exchange tubes 7 can be tested for air tightness at the same time. Based on this, the number of inclined grooves 501 is also five.

[0039] The present invention aims to realize the loading and unloading of heat exchange tubes 7 by raising and lowering the top plate 5. Based on this, those skilled in the art should understand that when the top plate 5 is located below the support groove 3011, the inclined groove 501 near the loading component 1 should be located below the rear end of the loading component 1 (i.e., the end near the detection station 3) so that when the top plate 5 is raised, it can lift one heat exchange tube 7 on the loading component 1. At the same time, the ramp 502 should be located below the unloading component 2 so that when it is raised, the heat exchange tube 7 can roll along the ramp 502 onto the unloading component 2. In addition, the bottom of the inclined groove 501 is directly below the top of the adjacent inclined groove 501 or the top of the ramp 502, and the straight line formed by the bottom of the previous inclined groove 501 and the next inclined groove 501 (or the top of the ramp 502) should be within the width range of the support groove 3011 so that after the top plate 5 is raised and reset, the heat exchange tube 7 can be transferred from the previous support groove 3011 to the next adjacent support.

[0040] The following is a detailed description of the principles of feeding and unloading. Before feeding, the heat exchange tube 7 accumulates at the baffle block 4 of the feeding component 1 (e.g., Figure 5 As shown, it should be understood that the rising height of the top plate 5 in the figure is for ease of understanding and does not represent the actual rising height (the same applies to other figures). During feeding, the top plate 5 rises, and the inclined groove 501 near the feeding component 1 lifts one of the heat exchange tubes 7 on the feeding component 1. Under the action of gravity, the heat exchange tube 7 rolls into the bottom of the inclined groove 501 (e.g., ...). Figure 6 (As shown), then the top plate 5 (descends) resets. Without the support of the top plate 5, the heat exchange tube 7 in the inclined trough 501 falls into the support groove 3011 near the feeding component 1 (as shown). Figure 7 As shown), the top plate 5 rises again, and the heat exchange tube 7 in the support groove 3011 near the feeding component 1 is lifted by the next inclined groove 501 on the top plate 5. At the same time, another heat exchange tube 7 on the feeding component 1 falls into the inclined groove 501 near the feeding component 1 (as shown). Figure 8 As shown), after the top plate 5 (descends) resets, the heat exchange tube 7 in the support groove 3011 near the feeding component 1 moves to the next support groove 3011, and at the same time, the heat exchange tube 7 in the inclined groove 501 near the feeding component 1 falls into the support groove 3011 near the feeding component 1 (as shown). Figure 9 (As shown).

[0041] Each time the top plate 5 rises and falls, it causes one heat exchange tube 7 on the feeding component 1 to fall into the support groove 3011 near the feeding component 1, and at the same time, the heat exchange tube 7 in the previous support groove 3011 is transferred to the next adjacent support groove 3011, until each support groove 3011 has a heat exchange tube 7, at which point the feeding is completed (e.g., Figure 10 (As shown); after the material is loaded, an airtightness test is performed.

[0042] After the inspection is completed, the material is unloaded. The top plate 5 rises, and the heat exchange tube 7 in the support groove 3011 near the unloading component 2 is lifted and rolled down to the unloading component 2 via the ramp 502. At this time, one heat exchange tube 7 on the loading component 1 and other tubes in the support groove 3011 are also lifted (e.g., Figure 11 As shown, after the top plate 5 (lowers) resets, the heat exchange tubes 7 that have completed the inspection are transferred to the next support groove 3011, and at the same time, they are loaded into the support groove 3011 near the loading component 1. This process is repeated until all the heat exchange tubes 7 that have completed the inspection are transferred to the unloading component 2, thus completing the unloading and loading of another batch of heat exchange tubes 7. It can be seen that in this invention, automatic loading and unloading can be completed by the lifting and lowering action of the top plate 5. Compared with the prior art, this simplifies the loading and unloading action and also simplifies the overall structure.

[0043] Refer again Figure 2 Preferably, in this embodiment, the other side of the support plate 301 is provided with a movable clamping plate 6. Alternatively, the movable clamping plate 6 is moved by a cylinder, that is, the movable clamping plate 6 is moved by the extension and retraction of the cylinder. The clamping plate 6 is provided with a first clamping part 601 corresponding to each support groove 3011, and a second clamping part 3012 on one side of the support groove 3011. Moving the clamping plate 6 can clamp and fix the heat exchange tube 7 between the first clamping part 601 and the second clamping part 3012. This arrangement facilitates the fixing of the heat exchange tube 7 at the support location and avoids damage to the heat exchange tube 7 (such as bending, deformation, etc.) when the sealing components seal the two ends of the heat exchange tube 7 later.

[0044] Furthermore, both the first clamping part 601 and the second clamping part 3012 have a V-shaped structure. Their combined action allows the heat exchange tube 7 to move upwards and simultaneously contact the upper and lower sides of the V-shaped structure when clamped (e.g., ...). Figure 3 (As shown), this facilitates better fixation of the heat exchange tube 7.

[0045] refer to Figure 3 In this embodiment, as an option, the second clamping part 3012 is located on the side of the support groove 3011 near the feeding component 1. Furthermore, in the direction of the line connecting adjacent support grooves 3011, the distance H between the top of the inclined groove 501 corresponding to the second clamping part 3012 and the top of the second clamping part 3012 is less than half the outer diameter of the heat exchange tube 7. This facilitates that when the top plate 5 is raised, the heat exchange tube 7 in the support groove 3011 can smoothly roll to the top of the inclined groove 501, instead of falling back to the bottom of the previous inclined groove 501. Alternatively, in this design, the top of the second clamping part 3012 is provided with a guide slope (not shown in the figure) to facilitate that after the top plate 5 (lowers) is reset, the heat exchange tube 7 can smoothly fall into the support groove 3011.

[0046] refer to Figure 4In other embodiments, the second clamping part 3012 may also be provided on the side of the support groove 3011 near the unloading part 2. In the direction of the line connecting adjacent support grooves 3011, the distance h between the top of the inclined groove 501 corresponding to the second clamping part 3012 and the top of the second clamping part 3012 is greater than 1 / 2 of the outer diameter of the heat exchange tube 7. The purpose is also to facilitate the heat exchange tube 7 in the support groove 3011 to roll smoothly to the top of the inclined groove 501 when the top plate 5 is raised, instead of falling back to the bottom of the previous inclined groove 501.

[0047] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An automatic loading and unloading heat exchanger tube airtightness detection device, characterized in that, It includes a feeding component, an inspection station, and an unloading component arranged in sequence. The feeding component is used to transport the heat exchange tube to the inspection station, and the unloading component is used to move the heat exchange tube away from the inspection station. The inspection station is provided with at least two support plates and a liftable top plate on one side of the support plates. The support plates are provided with several support grooves at intervals. The top plate is provided with inclined grooves with the same number of support grooves and a ramp near the unloading component. Both the inclined grooves and the ramp gradually decrease in the direction of approaching the unloading component. After the top plate rises, it can cause one heat exchange tube on the feeding component to roll into the bottom of the adjacent inclined groove. After the top plate is reset, it can cause the heat exchange tube to fall into the adjacent support groove. In the future, each time the top plate rises and falls, it can transfer one heat exchange tube on the feeding component to the adjacent support groove, and transfer the heat exchange tube in the support groove to the next adjacent support groove. After the test is completed, the heat exchange tube can be transferred to the unloading component in the same way. The other side of the support plate is provided with a translatable clamping plate. The clamping plate is provided with a first clamping part corresponding to each support groove, and a second clamping part is provided on one side of the support groove. The translation of the clamping plate can clamp and fix the heat exchange tube between the first clamping part and the second clamping part.

2. The automatic loading and unloading heat exchanger tube airtightness detection device according to claim 1, characterized in that, The lifting and lowering of the top plate and the translation of the clamping plate are both achieved by cylinders.

3. The automatic loading and unloading heat exchanger tube airtightness detection device according to claim 1, characterized in that, Both the first clamping part and the second clamping part have a V-shaped structure.

4. The automatic loading and unloading heat exchanger tube airtightness detection device according to claim 3, characterized in that, The second clamping part is located on the side of the support groove near the feeding component, and in the direction of the line connecting adjacent support grooves, the distance between the top of the inclined groove corresponding to the second clamping part and the top of the second clamping part is less than 1 / 2 of the outer diameter of the heat exchange tube.

5. The automatic loading and unloading heat exchanger tube airtightness detection device according to claim 4, characterized in that, The top of the second clamping part is provided with a guide slope.

6. The automatic loading and unloading heat exchanger tube airtightness detection device according to claim 3, characterized in that, The second clamping part is located on the side of the support groove near the unloading component, and in the direction of the line connecting adjacent support grooves, the distance between the top of the inclined groove corresponding to the second clamping part and the top of the second clamping part is greater than 1 / 2 of the outer diameter of the heat exchange tube.

7. The automatic loading and unloading heat exchanger tube airtightness detection device according to any one of claims 1-6, characterized in that, Both the feeding component and the unloading component are guide frames, and the top surface of the guide frame has an inclined guide surface.

8. The automatic loading and unloading heat exchanger tube airtightness detection device according to claim 7, characterized in that, Both the feeding component and the unloading component are equipped with a baffle block at their ends.

9. The automatic loading and unloading heat exchanger tube airtightness detection device according to claim 8, characterized in that, Limiting components are provided on both sides of the feeding component and both sides of the unloading component to limit the position of the two ends of the heat exchange tube.

Images