A multi-channel parallel heat exchanger tube airtightness testing device

Abstract

This utility model discloses a multi-channel parallel heat exchanger tube airtightness testing device, belonging to the technical field of heat exchanger tube airtightness testing equipment. It includes: an immersion tank, a filter box installed inside the support base of the immersion tank, and a water pump installed at the input end of the filter box. The input end of the water pump is fixedly connected to the bottom of the immersion tank. This utility model removes the tested heat exchanger tube from the immersion tank by opening a cylinder, and simultaneously activates the water pump to draw water from the immersion tank into the filter box. Three filter plates in the filter box filter metal debris and dust from the water, and baffles one and two form a filtration channel within the filter box, increasing the water's residence time for further filtration. The filtered water re-enters the immersion tank through a connecting pipe for airtightness testing. This structural design keeps the water in the immersion tank clear, facilitating observation of air bubbles and improving the accuracy of the equipment's testing.

Description

Technical Field

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

[0002] Multi-channel parallel heat exchange tubes are a type of high-efficiency heat exchange element widely used in refrigeration, air conditioning, chemical, and energy fields. Their core design concept is to set multiple independent channels within a single heat exchange tube to achieve parallel flow of fluids, thereby improving heat exchange efficiency and optimizing space utilization. However, after factory production, airtightness testing equipment is required to ensure that the heat exchange tubes are qualified. Airtightness testing equipment includes pressure decay method testing devices, differential pressure method testing devices, underwater bubble method devices, and helium mass spectrometry leak detection devices.

[0003] Most current multi-channel parallel heat exchanger tube underwater bubble method devices typically inject gas into the heat exchanger tubes, block the air inlet with a sealing plug, and then immerse the heat exchanger tubes in a water tank. Workers observe the bubbles in the water; if there are no bubbles, the product is considered qualified, while the presence of bubbles indicates failure. However, the surface of newly produced heat exchanger tubes may have metal fragments or dust. After the equipment has been tested for a period of time, these impurities will remain in the water tank. The remaining impurities will affect the transparency of the water, making it difficult to observe small bubbles, resulting in inaccurate airtightness testing of the equipment. Utility Model Content

[0004] In view of the above-mentioned shortcomings of the existing technology, the present invention provides a multi-channel parallel heat exchange tube airtightness testing device, which can effectively solve the problems mentioned in the background technology.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a multi-channel parallel heat exchange tube airtightness testing device, comprising: an immersion tank, a filter box installed inside the support base of the immersion tank, a water pump installed at the input end of the filter box, the input end of the water pump being fixedly connected to the bottom of the lower end of the immersion tank, a connecting pipe being fixedly connected to the output end of the filter box, one end of the connecting pipe being fixedly connected to one side of the immersion tank, three filter plates being arranged inside the filter box, the filter holes of the three filter plates gradually decreasing from the water inlet end of the filter box, a baffle plate one being fixedly connected to the bottom of the filter box, and a baffle plate two being fixedly connected to one side of the inner wall of the filter box, the baffle plate one and the baffle plate two forming a filter channel inside the filter box.

[0006] As a further preferred embodiment of this technical solution, a top plate is provided above the filter box, and three mounting slots are fixedly connected to the lower end of the top plate. The inner walls of the three mounting slots are slidably connected to the upper ends of the three filter plates respectively.

[0007] As a further preferred embodiment of this technical solution, a sealing ring is attached to the upper end of the filter box, and screws are threaded to the four corners of the upper end of the top plate, with one side of each screw threaded to the four corners of the upper end of the filter box.

[0008] As a further preferred embodiment of this technical solution, a bracket is fixedly connected to one side of the soaking tank, and two cylinders are installed at the upper end of the bracket. A lifting frame is provided inside the soaking tank, and the upper sides of the lifting frame are fixedly connected to one end of the telescopic rod of the two cylinders, respectively.

[0009] As a further preferred embodiment of this technical solution, two mounting plates are fixedly connected to both sides of the upper middle part of the lifting frame. A screw is threadedly connected to the inner wall of one of the mounting plates, and a fixing plate is fixedly connected to one side of the other mounting plate at one end of the screw.

[0010] As a further preferred embodiment of this technical solution, a control device is fixedly installed on one side of the upper end of the soaking pool, and a camera device is installed at the lower end of the bracket.

[0011] As a further preferred embodiment of this technical solution, the inner wall of the soaking tank is equipped with multiple LED lights.

[0012] The technical solution provided by this utility model has the following advantages compared with the known prior art:

[0013] 1. This utility model uses a cylinder to remove the tested heat exchange tube from the soaking tank, and simultaneously turns on a water pump to draw water from the soaking tank into a filter box. Three filter plates in the filter box filter metal debris and dust from the water, and baffles one and two form a filtration channel in the filter box, increasing the water's residence time in the filter box for further filtration. The filtered water then re-enters the soaking tank through a connecting pipe for airtightness testing. This structural design keeps the water in the soaking tank clear, making it easy for staff to observe bubbles and improving the accuracy of the equipment's testing.

[0014] 2. This utility model, through the structural design of a top plate, mounting groove, and screws, allows the top plate to be removed from the filter box by rotating the screws. Then, the filter plate can be pulled from the side and slid in the mounting groove to remove it from the top plate. This structure is simple, easy to operate, and allows for quick cleaning and replacement of the filter box and filter plate, improving the convenience of equipment maintenance. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0017] Figure 2 This is a three-dimensional structural diagram of the lifting frame in this utility model;

[0018] Figure 3 This is a cross-sectional exploded view of the filter box in this utility model;

[0019] Figure 4 This is a schematic diagram of the cross-sectional structure of the filter box in this utility model.

[0020] 1. Soaking tank; 2. Support frame; 3. Cylinder; 4. Lifting frame; 5. Camera equipment; 6. Control device; 7. LED light; 8. Filter box; 9. Water pump; 10. Connecting pipe; 11. Mounting plate; 12. Fixing plate; 13. Screw; 14. Baffle one; 15. Baffle two; 16. Top plate; 17. Mounting groove; 18. Sealing ring; 19. Filter plate; 20. Screw. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0022] The present invention will be further described below with reference to the embodiments.

[0023] This utility model provides a technical solution: such as Figure 1 - Figure 4As shown in this embodiment, a multi-channel parallel heat exchange tube airtightness testing device includes: an immersion tank 1, a filter box 8 installed inside the support base of the immersion tank 1, a water pump 9 installed at the input end of the filter box 8, the input end of the water pump 9 being fixedly connected to the bottom of the lower end of the immersion tank 1, a connecting pipe 10 being fixedly connected to the output end of the filter box 8, one end of the connecting pipe 10 being fixedly connected to one side of the immersion tank 1, three filter plates 19 being provided inside the filter box 8, the filter holes of the three filter plates 19 gradually decreasing from the water inlet end of the filter box 8, a baffle 14 being fixedly connected to the bottom of the filter box 8, and a baffle 25 being fixedly connected to one side of the inner wall of the filter box 8, the baffle 14 and the baffle 25 forming a filter channel inside the filter box 8.

[0024] By opening cylinder 3, the tested heat exchange tube is removed from the soaking tank 1. At the same time, water pump 9 is turned on to pump water from the soaking tank 1 into the filter box 8. The three filter plates 19 in the filter box 8 filter metal debris and dust in the water. Baffle 1 14 and Baffle 2 15 form a filtration channel in the filter box 8, increasing the water's residence time in the filter box 8 for further filtration. The filtered water re-enters the soaking tank 1 through the connecting pipe 10 for airtightness testing. This structural design keeps the water in the soaking tank 1 clear, making it convenient for staff to observe bubbles and improving the accuracy of equipment testing.

[0025] It is important to note that the three filter plates 19 are a primary filter, a secondary filter, and a tertiary filter, respectively. The primary filter intercepts metal debris and lint, the secondary filter uses PP cotton and activated carbon to remove tiny suspended solids and organic matter, and the tertiary filter is a 0.2μm ultrafiltration membrane, designed for high-precision detection, to filter bacteria and colloids and prevent microbial growth. The impurities in the soaking tank 1 are filtered only when the lifting frame 4 is removed from the soaking tank 1. The water pump 9 stops starting before the lifting frame 4 enters the soaking tank 1.

[0026] like Figure 3 and Figure 4 As shown, a top plate 16 is provided above the filter box 8. Three mounting slots 17 are fixedly connected to the lower end of the top plate 16. The inner walls of the three mounting slots 17 are slidably connected to the upper ends of the three filter plates 19 respectively. The mounting slots 17 are used to install the filter plates 19. After the top plate 16 is removed, the filter plates 19 can be removed by pulling them from the side, which is convenient for staff to replace and clean.

[0027] like Figure 3 and Figure 4As shown, a sealing ring 18 is attached to the upper end of the filter box 8, and screws 20 are threaded to the four corners of the upper end of the top plate 16. One side of each of the four screws 20 is threaded to the four corners of the upper end of the filter box 8. The sealing ring 18 is used to seal the gap between the top plate 16 and the filter box 8 to prevent water in the filter box 8 from escaping through the gap, which would prevent the water in the soaking pool 1 from circulating.

[0028] like Figure 1 and Figure 2 As shown, a bracket 2 is fixedly connected to one side of the soaking tank 1. Two cylinders 3 are installed on the upper end of the bracket 2. A lifting frame 4 is set inside the soaking tank 1. The upper two sides of the lifting frame 4 are fixedly connected to one end of the telescopic rod of the two cylinders 3 respectively. The two cylinders 3 are driven to open simultaneously by the control device 6, so that the lifting frame 4 can enter into the soaking tank 1 and move out of the soaking tank 1, which facilitates the airtightness test of the heat exchange tube.

[0029] like Figure 1 and Figure 2 As shown, two mounting plates 11 are fixedly connected to both sides of the upper middle part of the lifting frame 4. A screw 13 is threadedly connected to the inner wall of one of the mounting plates 11. A fixing plate 12 is fixedly connected to one end of the screw 13 and one side of the other mounting plate 11. The heat exchange tube to be tested is placed on the lifting frame 4, with one end of the heat exchange tube abutting against one of the mounting plates 11. The screw 13 is rotated, and the screw 13 drives the other mounting plate 11, which abuts against the other end of the heat exchange tube, thus fixing the heat exchange tube.

[0030] like Figure 1 As shown, a control device 6 is fixedly installed on one side of the upper end of the soaking tank 1, and a camera device 5 is installed on the lower end of the bracket 2. The camera device 5 is used to conveniently observe the bubble generation of the heat exchange tube in the soaking tank 1. The control device 6 is used to control the cylinder 3, the camera device 5 and the water pump 9 to work together. When the cylinder 3 moves the lifting frame 4 out of the soaking tank 1, the water pump 9 is turned on to filter the water in the soaking tank 1.

[0031] like Figure 1 As shown, multiple LED lights 7 are installed on the inner wall of the soaking tank 1. The LED lights 7 are used to enhance the internal lighting of the soaking tank 1, making it easier to observe. Even if there are trace impurities in the water, the bubbles can be observed more clearly through light refraction.

[0032] This invention provides a multi-channel parallel heat exchanger tube airtightness testing device, the specific working principle of which is as follows:

[0033] When performing an airtightness test on a multi-channel parallel heat exchanger tube, the outlet is plugged with a rubber stopper, and gas is injected into the heat exchanger tube. After injection, the inlet is also plugged. The heat exchanger tube is then placed on the lifting frame 4, with one end of the heat exchanger tube abutting against one of the mounting plates 11. The screw 13 is rotated, which drives the other mounting plate 11, fixing the heat exchanger tube against the other end. The operator operates the control device 6, using two cylinders 3, to lower the lifting frame 4 into the soaking tank 1. The operator observes whether bubbles are generated in the soaking tank 1. The presence of bubbles indicates that the heat exchanger tube is unqualified; the absence of bubbles indicates that it is qualified. After the test is completed, the cylinders 3... The lifting frame 4 is removed from the soaking tank 1. During the process of removing the heat exchange tube and installing the heat exchange tube to be tested, the cylinder 3 is turned on to remove the tested heat exchange tube from the soaking tank 1. At the same time, the water pump 9 is turned on to pump the water in the soaking tank 1 into the filter box 8. The three filter plates 19 in the filter box 8 filter metal debris and dust in the water. The baffle 14 and the baffle 2 15 form a filtration channel in the filter box 8 to increase the residence time of the water in the filter box 8 for further filtration. The filtered water re-enters the soaking tank 1 through the connecting pipe 10. When the lifting frame 4 is lowered into the soaking tank 1, the water pump 9 is turned off. The above operation is repeated to test the airtightness of the heat exchange tube.

[0034] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of this utility model.

Claims

1. A multi-channel parallel heat exchanger tube airtightness testing device, characterized in that, include: A soaking tank (1) is provided. A filter box (8) is installed inside the support base of the soaking tank (1). A water pump (9) is installed at the input end of the filter box (8). The input end of the water pump (9) is fixedly connected to the bottom of the lower end of the soaking tank (1). A connecting pipe (10) is fixedly connected to the output end of the filter box (8). One end of the connecting pipe (10) is fixedly connected to one side of the soaking tank (1). Three filter plates (19) are provided inside the filter box (8). The filter holes of the three filter plates (19) gradually decrease from the water inlet end of the filter box (8). A baffle plate (14) is fixedly connected to the bottom of the filter box (8). A baffle plate (15) is fixedly connected to one side of the inner wall of the filter box (8). The baffle plate (14) and the baffle plate (15) form a filter channel inside the filter box (8).

2. The multi-channel parallel heat exchanger tube airtightness testing device according to claim 1, characterized in that: A top plate (16) is provided above the filter box (8), and three mounting slots (17) are fixedly connected to the lower end of the top plate (16). The inner walls of the three mounting slots (17) are slidably connected to the upper ends of the three filter plates (19).

3. The multi-channel parallel heat exchanger tube airtightness testing device according to claim 2, characterized in that: The upper end of the filter box (8) is fitted with a sealing ring (18), and screws (20) are threaded to the four corners of the upper end of the top plate (16). One side of each of the four screws (20) is threaded to the four corners of the upper end of the filter box (8).

4. The multi-channel parallel heat exchanger tube airtightness testing device according to claim 1, characterized in that: A bracket (2) is fixedly connected to one side of the soaking pool (1). Two cylinders (3) are installed on the upper end of the bracket (2). A lifting frame (4) is provided inside the soaking pool (1). The upper ends of the lifting frame (4) are fixedly connected to one end of the telescopic rod of the two cylinders (3) on both sides respectively.

5. The multi-channel parallel heat exchanger tube airtightness testing device according to claim 4, characterized in that: The upper middle part of the lifting frame (4) is fixedly connected to two mounting plates (11) on both sides. One of the mounting plates (11) has a screw (13) threadedly connected to its inner wall. One end of the screw (13) and one side of the other mounting plate (11) are fixedly connected to a fixing plate (12).

6. The multi-channel parallel heat exchanger tube airtightness testing device according to claim 4, characterized in that: A control device (6) is fixedly installed on one side of the upper end of the soaking pool (1), and a camera device (5) is installed on the lower end of the bracket (2).

7. The multi-channel parallel heat exchanger tube airtightness testing device according to claim 1, characterized in that: The inner wall of the soaking pool (1) is equipped with multiple LED lights (7).

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