Gas tightness detection device for heat exchanger of gas water heater

Abstract

The utility model provides a gas water heater heat exchanger airtightness detection device, which belongs to the technical field of detection devices and comprises a workbench and a processor, the workbench is connected with a protective shell to form a detection cavity, two groups of screw rod sliding tables are arranged in the detection cavity, and one end of each screw rod sliding table is arranged outside the detection cavity in a penetrating manner and positioned on one side of the protective shell; a clamping assembly is arranged in the detection cavity, the clamping assembly is connected with the two lead screw sliding tables, and the heat exchanger body is clamped on the clamping assembly; an inflation assembly and two thermal imagers are arranged in the detection cavity, the processor is located on one side of the protective shell, and a control panel is further arranged on the workbench. According to the detection device, the heat exchanger body is fixed through the clamping assembly, the heat exchanger body is moved to the position above the inflation assembly through the two lead screw sliding tables to be filled with hot air, the thermal imager can capture the temperature change, generated due to hot air leakage, of the surface of the heat exchanger body, the air tightness condition is accurately judged, and the detection accuracy is improved. And the detection efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of detection devices, and more specifically, relates to an air tightness detection device for a heat exchanger of a gas water heater. Background Art

[0002] During the use of gas water heaters, the sealing of the heat exchanger is closely related to the safety performance and use effect of the gas water heater. If there is an airtightness problem in the heat exchanger, it is easy to cause water leakage, which will not only affect the normal supply of hot water, but also may damage the surrounding equipment. Therefore, in the production process of the heat exchanger, it is often necessary to perform airtightness testing on the heat exchanger to ensure the safety and performance of the heat exchanger. However, traditional airtightness testing is often done manually with the help of simple tools to check the heat exchangers one by one to see if there are cracks on the surface of the heat exchanger, which requires a lot of time and energy and also leads to reduced detection efficiency. At the same time, the detection process is easily affected by human factors, resulting in misjudgment, resulting in reduced accuracy and reliability of the detection structure. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides an air tightness detection device for a gas water heater heat exchanger to solve the technical problems in the existing technology that traditional air tightness detection is carried out through manual detection, has low detection efficiency, and is easily affected by human factors, resulting in the accuracy and reliability of the detection structure.

[0004] The purpose and function of the gas water heater heat exchanger air tightness detection device of the utility model are achieved by the following specific technical means:

[0005] A gas water heater heat exchanger air tightness detection device includes a workbench and a processor, the workbench is connected to the protective shell to form a detection cavity, an entry and exit slot is opened on one side of the protective shell, two groups of screw slides are arranged in the detection cavity, one end of the screw slide is passed through the outside of the detection cavity and is located on one side of the protective shell; a clamping assembly is arranged in the detection cavity, the clamping assembly is connected to the two groups of the screw slides, and the heat exchanger body is clamped on the clamping assembly; an inflation assembly and two groups of thermal imagers are arranged in the detection cavity, the processor is located on one side of the protective shell, and a control panel is also provided on the workbench.

[0006] According to a preferred embodiment, the clamping assembly includes a clamping frame, and multiple groups of connecting columns are provided on the screw slide. The clamping frame is provided with connecting holes corresponding to the connecting columns. The connecting columns are provided with connecting nuts through the connecting holes. The clamping frame is detachably connected to the two groups of screw slides; two groups of bearings are provided on the clamping frame, and the two ends of the bidirectional screw are inserted into the bearings.

[0007] According to a preferred embodiment, the clamping assembly also includes two groups of clamping plates, the two groups of clamping plates are arranged opposite to each other, and two groups of limit plates are provided on the clamping frame. One end of the clamping plate is clamped between the two groups of limit plates and is sleeved on the bidirectional screw rod. The clamping plate is slidably connected to the clamping frame through the bidirectional screw rod, and the heat exchanger body is clamped between the two groups of clamping plates.

[0008] According to a preferred embodiment, a through hole is opened on the clamping plate, the electric cylinder is installed on the outside of the clamping plate, the shaft end of the electric cylinder is passed through the through hole, and a suction cup is provided on the shaft end of the electric cylinder, and the suction cup is in contact with the heat exchanger body.

[0009] According to a preferred embodiment, a motor is provided above the workbench, the motor is mounted on one side of the clamping frame, and the motor shaft end is connected to the bidirectional screw rod.

[0010] According to a preferred embodiment, the inflation component includes a fan, which is installed on the workbench, a heating tank is provided above the workbench, a heating cover is connected to the heating tank to form a heating chamber, the fan is connected to the heating cover through a connecting tank, and is communicated with the heating chamber; a heating wire is provided in the heating chamber, and a temperature controller is also provided on one side of the heating tank, and the temperature controller is electrically connected to the heating wire.

[0011] According to a preferred embodiment, the inflation component also includes an air injection nozzle, a slide rail is provided between the two groups of the screw slides, an electric slider is slidably provided on the slide rail, a partition is provided on the electric slider, an electric lifting rod is provided on one side of the partition, and a fixed claw is provided on the other side, one end of the fixed claw passes through the partition and is connected to the shaft end of the electric lifting rod, the air injection nozzle is clamped in the fixed claw, and is connected to the heating tank through the connecting pipe.

[0012] According to a preferred embodiment, the workbench and the protective shell are both provided with support rods, a support platform is provided on the support rods, the support platform is arranged in an inclined shape, and the thermal imager is mounted on the support platform.

[0013] According to a preferred embodiment, multiple groups of installation slots are opened on one side of the protective shell, fans are arranged in the installation slots, multiple groups of heat dissipation slots are opened on the other side of the protective shell, an electric sliding door is set on one side of the protective shell, and can cover the entry and exit slots, and a visual window is set on the electric sliding door.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. The workbench and protective housing are connected to form a relatively enclosed inspection chamber. Two sets of screw slides are installed above the workbench, with their ends respectively inserted into the inspection chamber and the outside world. This allows the clamping assembly to freely enter and exit the inspection chamber via the screw slides, facilitating the installation of the heat exchanger body. An inflation assembly is installed within the protective chamber, generating hot air through a fan and a heating wire within the heating tank. When the heat exchanger body is within the inspection chamber, the inflation assembly's air injection nozzle can be inserted into the heat exchanger body's air inlet pipe via an electric slider and an electric lifting rod, thereby inflating the heat exchanger body with hot air. Simultaneously, two sets of thermal imagers are installed within the inspection chamber, providing all-round, real-time monitoring of the heat exchanger body from different angles. The thermal imagers can capture temperature changes on the heat exchanger surface caused by hot air leakage. Once a leak occurs, hot air will form local temperature anomalies at the leak site. The thermal imager will quickly capture these subtle changes and transmit the data to the processor for analysis, thereby accurately judging the airtightness of the heat exchanger, improving detection efficiency, avoiding areas that may be missed by manual inspection, and improving the accuracy and reliability of detection.

[0016] 2. The heat exchanger body is clamped between two sets of clamping plates in the clamping assembly. The clamping plates can be moved on the clamping frame via a bidirectional screw to change the distance between the two sets of clamping plates. This allows for fixed-size adjustments based on the size of the heat exchanger body, making it suitable for airtightness testing of heat exchanger bodies of various sizes, improving the versatility and applicability of the device. The fan and heat dissipation slots installed on the protective housing can promptly dissipate heat from the protective cavity, maintaining a suitable temperature inside the cavity and preventing excessive temperatures caused by long-term operation of the equipment or the injection of hot air, which may affect the performance of the test equipment and the accuracy of the test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the utility model after assembly;

[0018] Figure 2 It is a schematic diagram of the structure of the utility model after being disassembled;

[0019] Figure 3 It is a schematic diagram of the structure after the clamping assembly is disassembled;

[0020] Figure 4 yes Figure 2 A partial enlarged view of area a in the middle;

[0021] Figure 5 It is a schematic diagram of the structure of the protective shell;

[0022] Figure 6 This is a principle block diagram of the utility model.

[0023] In the figure, the corresponding relationship between the component names and the drawing numbers is as follows:

[0024] 11. Workbench; 12. Protective shell; 13. Access slot; 14. Support rod; 15. Support platform; 16. Mounting slot; 17. Heat dissipation slot; 18. Electric sliding door; 21. Processor; 22. Screw slide; 23. Heat exchanger body; 24. Thermal imager; 25. Control panel; 26. Connecting column; 31. Clamping frame; 32. Connecting hole; 33. Clamping plate; 34. Limiting plate; 35. Through hole; 36. Electric cylinder; 37. Suction cup; 38. Motor; 39. Bidirectional screw; 41. Fan; 42. Heating tank; 43. Heating cover; 44. Heating wire; 45. Temperature controller; 46. Gas injection nozzle; 51. Slide rail; 52. Electric slider; 53. Partition; 54. Electric lifting rod; 55. Fixed claw. DETAILED DESCRIPTION

[0025] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following embodiments are used to illustrate the technical solution of the present invention, but are not intended to limit the scope of protection of the present invention.

[0026] Example:

[0027] like Figures 1 to 6As shown, the present invention provides a gas water heater heat exchanger air tightness detection device, including a workbench 11 and a processor 21. The workbench 11 serves as the basic support part of the entire device. The workbench 11 is connected to the protective shell 12, together forming a relatively closed detection chamber. The detection chamber provides a spatial environment for the air tightness detection of the heat exchanger body 23, which can effectively isolate external interference and ensure the accuracy and stability of the detection. An entry and exit slot 13 is provided on one side of the protective shell 12 to facilitate the heat exchanger body 23 to enter and exit the detection chamber, making the placement and removal of the heat exchanger more convenient in actual operation. Within the detection chamber, two sets of screw slides 22 play a key transportation role. One end of the screw slide 22 extends outside the detection chamber and is located on one side of the protective shell 12. This allows the clamping assembly connected to the screw slide 22 to move freely within the detection chamber, realizing smooth transportation of the heat exchanger body 23 in and out of the detection chamber, greatly facilitating the installation operation of the heat exchanger body 23. A clamping assembly is also provided in the detection chamber, which is an important component for fixing the heat exchanger body 23. The heat exchanger body 23 is clamped to the clamping assembly, ensuring it remains stable in the testing position during the test, preventing displacement or shaking. This provides essential support for subsequent testing steps. The test chamber is also equipped with an inflation assembly and two thermal imagers 24. The inflation assembly is used to inject a specific gas into the heat exchanger body 23, creating conditions for airtightness testing. The two thermal imagers 24 provide comprehensive, real-time monitoring of the heat exchanger body 23 from different angles, capturing subtle temperature changes on the heat exchanger surface caused by gas leaks. The thermal imagers 24 can be FLIRT640 thermal imagers. Data collected by the thermal imagers 24 is promptly transmitted to the processor 21 located on the side of the protective housing 12 for analysis and processing. The processor 21 can be an AMD Ryzen 55600X processor. Furthermore, a control panel 25 is provided on the workbench 11, allowing the operator to set parameters and control the entire testing device, ensuring complete control of the testing process.

[0028] like Figure 2 、 Figure 3 As shown, the clamping assembly includes a clamping frame 31, which is connected to the screw slide 22. Multiple groups of connecting columns 26 are evenly distributed on the screw slide 22, and the clamping frame 31 has corresponding connecting holes 32. When the connecting columns 26 pass through the connecting holes 32 and the connecting nuts are put on, a firm and detachable connection between the clamping frame 31 and the two groups of screw slides 22 is achieved, which not only ensures the stability of the clamping frame 31 during operation, but also provides convenience for subsequent maintenance and replacement. At the same time, two groups of bearings are set on the clamping frame 31, and the two ends of the bidirectional screw 39 are inserted into the bearings, providing reliable support for the smooth rotation of the bidirectional screw 39, making the entire clamping and adjustment process more stable.

[0029] Two sets of clamping plates 33 are positioned opposite each other, directly contacting and securing the heat exchanger body 23. Two sets of stopper plates 34 on the clamping frame 31 provide important position limiting and guiding functions. One end of the clamping plate 33 is positioned between the two sets of stopper plates 34 and is mounted on a bidirectional screw 39. Rotation of the bidirectional screw 39 allows the clamping plate 33 to slidably connect to the clamping frame 31. The distance between the two sets of clamping plates 33 can be adjusted to accommodate the varying sizes of the heat exchanger body 23, effectively securing heat exchanger bodies 23 of various sizes. To further enhance the securing effect on the heat exchanger body 23, through-holes 35 are provided in the clamping plates 33. An electric cylinder 36 is mounted on the outside of the clamping plates 33, with its shaft end inserted into the through-holes 35. A suction cup 37, mounted on the shaft end of the electric cylinder 36, contacts the heat exchanger body 23. When the electric cylinder 36 is working, the suction cup 37 can generate a strong adsorption force, so that the heat exchanger body 23 is more firmly fixed on the clamping assembly, reducing the possibility of displacement or loosening due to interference from external factors during the detection process.

[0030] A motor 38 is provided above the workbench 11. The motor 38 is mounted on one side of the clamping frame 31, and its shaft end is connected to the bidirectional screw 39. As a power source, the motor 38 provides strong and stable power for the rotation of the bidirectional screw 39. By controlling the operation of the motor 38, the spacing between the clamping plates 33 can be adjusted. When faced with heat exchanger bodies 23 of different sizes, the operator can control the motor 38 through the control panel 33 to quickly move the clamping plates 33 to the appropriate position, improving work efficiency and operational convenience, and further enhancing the performance and applicability of the entire device.

[0031] like Figure 2 、 Figure 4 As shown, the inflation component includes a fan 41, which is installed on the workbench 11 and serves as a power source for the gas, and is responsible for sucking in external air. The heating tank 42 above the workbench 11 is a key component for achieving gas heating, and the heating cover 43 is connected to the heating tank 42 to form a heating chamber. The fan 41 is connected to the heating cover 43 through a connecting tank, so that the inhaled air can smoothly enter the heating chamber. The heating wire 44 set in the heating chamber is the core component for achieving air heating. When current passes through the heating wire 44, it generates heat, thereby heating the air flowing through the heating chamber. In order to control the heating temperature, a thermostat 45 is also provided on one side of the heating tank 42. The thermostat 45 is electrically connected to the heating wire 44. The thermostat 45 can monitor the temperature in the heating chamber in real time and automatically adjust the power of the heating wire 44 according to the set temperature value to ensure that the temperature of the heated air is stable within an appropriate range to meet the requirements of the air tightness test of the heat exchanger body 23. The thermostat 45 can adopt the Omron E5CC-QX2ASM-800 thermostat.

[0032] The gas injection nozzle 46 is a key component for injecting heated gas into the heat exchanger body 23. A slide rail 51 is located between the two sets of screw slides 22, and a motorized slider 52 is slidably mounted on the rail 51. The motorized slider 52 can move on the rail 51, providing a basis for adjusting the position of the gas injection nozzle 46. A partition 53 is provided on the motorized slider 52. An electric lift rod 54 on one side of the partition 53 cooperates with a fixed claw 55 on the other side. The fixed claw 55 securely holds the gas injection nozzle 46 in place. When the gas injection nozzle 46 needs to be inserted into the air intake pipe of the heat exchanger body 23, the electric lift rod 54 activates, and its shaft end drives the fixed claw 55 and the gas injection nozzle 46 downward, allowing the gas injection nozzle 46 to be accurately inserted into the air intake pipe. The gas injection nozzle 46 is connected to the heating tank 42 via a connecting pipe. This allows heated air to be smoothly injected from the heating tank 42 through the connecting pipe and the gas injection nozzle 46 into the heat exchanger body 23, creating the necessary conditions for subsequent airtightness testing. The various components of the entire inflation assembly work together to achieve automated and precise operations of gas heating, transportation and injection.

[0033] like Figure 2 、 Figure 4 、 Figure 5 As shown, support rods 14 are installed on both the workbench 11 and the protective shell 12, and the support rods 14 play a supporting role. The top of the support rod 14 is connected to the support platform 15, and the support platform 15 is set to be inclined, which can provide a unique viewing angle for the thermal imager 24 installed thereon, so that it can better monitor the heat exchanger body 23 in all directions. The thermal imager 24 is installed on the inclined support platform 15, which can more comprehensively capture the temperature distribution on the surface of the heat exchanger, reduce monitoring blind spots, and improve detection accuracy. On the other hand, the inclined support platform 15 can also prevent the thermal imager 24 from being directly interfered by light or collided with other objects to a certain extent, thereby protecting the normal operation and service life of the thermal imager 24.

[0034] One side of the protective housing 12 features multiple mounting slots 16, each housing a fan. The fans are designed to enhance air circulation within the protective chamber and dissipate heat generated by equipment operation. When the heat exchanger body 23 undergoes airtightness testing, particularly during the inflation and heating processes, a certain amount of heat accumulates within the protective chamber. The fans effectively dissipate this heat, maintaining the chamber's temperature within a stable range and preventing excessive temperatures from impacting equipment performance and the accuracy of test results. Furthermore, the other side of the protective housing 12 features multiple heat dissipation slots 17, which work in conjunction with the fans to further enhance heat dissipation efficiency. A power-operated sliding door 18 is also located on one side of the protective housing 12, shielding the access slot 13. During testing, the door 18 remains closed, maintaining the enclosure and minimizing interference from external factors. A viewing window is also included on the door 18, allowing operators to observe the chamber's conditions in real time without opening the door, keeping tabs on the test progress and equipment operating status, enhancing operational convenience and safety.

[0035] The specific usage and function of this embodiment are as follows:

[0036] During use, the electric sliding door 18 on one side of the protective housing 12 is opened to expose the access slot 13. The control panel 25 is then operated to control the screw slide 22 connected to the clamping assembly, causing it to move outward from the detection chamber, and the clamping assembly is moved to a position convenient for placing the heat exchanger body 23. The heat exchanger body 23 is placed between the two sets of clamping plates 33 of the clamping assembly, with one end of the heat exchanger body 23 inserted between the two sets of limit plates 34 on the clamping frame 31 to ensure initial positioning accuracy. The motor 38 is operated through the control panel 25, which drives the bidirectional screw 39 to rotate, causing the two sets of clamping plates 33 to move toward the center according to the size of the heat exchanger body 23, gradually clamping the heat exchanger body 23. At the same time, the electric cylinder 36 on the outside of the clamping plate 33 is activated, causing the suction cup 37 at the end of the electric cylinder 36 shaft to contact the heat exchanger body 23, enhancing the fixing effect.

[0037] After the heat exchanger body 23 is fixed, check the connection of each component again, operate the control panel 25, and start the fan 41. The fan 41 draws in the outside air and transports it to the heating chamber of the heating tank 42 through the connecting tank. The heating wire 44 in the heating tank 42 is powered on to start heating the air. The thermostat 45 monitors the temperature in the heating chamber in real time and automatically adjusts the power of the heating wire 44 according to the set temperature value to ensure that the air is heated to the appropriate temperature. Control the electric slider 52 to move on the slide rail 51 and move the air injection nozzle 46 to a position above the air inlet pipe of the heat exchanger body 23. Then start the electric lifting rod 54, so that its shaft end drives the fixed claw 55 and the air injection nozzle 46 to descend, and the air injection nozzle 46 is accurately inserted into the air inlet pipe of the heat exchanger body 23. The heated air is smoothly injected into the interior of the heat exchanger body 23 from the heating tank 42 through the connecting pipe and the air injection nozzle 46. After reaching the set inflation pressure and time, the inflation stops.

[0038] After inflation is complete, the thermal imager 24 begins operating, providing comprehensive, real-time monitoring of the heat exchanger body 23 from various angles. If there are any airtightness issues on the surface of the heat exchanger body 23, hot air will escape through leaks, resulting in abnormal surface temperature distribution. The thermal imager 24 can keenly detect these temperature changes and transmit the data to the processor 21 in real time. The operator can observe the conditions within the test chamber through a viewing window on the power-operated sliding door 18 on one side of the protective housing 12, while simultaneously viewing the data transmitted by the thermal imager 24 and the test progress on the control panel 25.

[0039] The basic principles, main features and advantages of the present invention are shown and described above. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments.

Claims

1. A gas water heater heat exchanger air tightness detection device, comprising a workbench (11) and a processor (21), characterized in that: The workbench (11) is connected to the protective shell (12) to form a detection cavity, and an entry and exit slot (13) is provided on one side of the protective shell (12). Two groups of screw slides (22) are arranged in the detection cavity, and one end of the screw slide (22) is arranged outside the detection cavity and is located on one side of the protective shell (12); a clamping component is arranged in the detection cavity, and the clamping component is connected to the two groups of the screw slides (22), and the heat exchanger body (23) is clamped on the clamping component; an inflation component and two groups of thermal imagers (24) are arranged in the detection cavity, and the processor (21) is located on one side of the protective shell (12). A control panel (25) is also provided on the workbench (11).

2. The gas water heater heat exchanger air tightness detection device according to claim 1, characterized in that: The clamping assembly includes a clamping frame (31), and a plurality of connecting columns (26) are provided on the screw slide (22). The clamping frame (31) is provided with connecting holes (32) corresponding to the connecting columns (26). The connecting columns (26) are provided with connecting nuts through the connecting holes (32). The clamping frame (31) is detachably connected to the two groups of the screw slides (22); two groups of bearings are provided on the clamping frame (31), and both ends of the bidirectional screw (39) are inserted into the bearings.

3. The gas water heater heat exchanger air tightness detection device according to claim 2, characterized in that: The clamping assembly also includes two groups of clamping plates (33), the two groups of clamping plates (33) are arranged opposite to each other, and two groups of limit plates (34) are arranged on the clamping frame (31). One end of the clamping plate (33) is clamped between the two groups of limit plates (34) and is sleeved on the bidirectional screw rod (39). The clamping plate (33) is slidably connected to the clamping frame (31) through the bidirectional screw rod (39), and the heat exchanger body (23) is clamped between the two groups of clamping plates (33).

4. The gas water heater heat exchanger air tightness detection device according to claim 3, characterized in that: A through hole (35) is provided on the clamping plate (33), and an electric cylinder (36) is installed on the outside of the clamping plate (33). The shaft end of the electric cylinder (36) is passed through the through hole (35). A suction cup (37) is provided on the shaft end of the electric cylinder (36), and the suction cup (37) contacts the heat exchanger body (23).

5. The gas water heater heat exchanger air tightness detection device according to claim 4, characterized in that: A motor (38) is provided above the workbench (11), and the motor (38) is installed on one side of the clamping frame (31). The shaft end of the motor (38) is connected to the bidirectional screw rod (39).

6. The gas water heater heat exchanger air tightness detection device according to claim 1, characterized in that: The inflation component includes a fan (41), the fan (41) is installed on the workbench (11), a heating tank (42) is provided above the workbench (11), a heating cover (43) is connected to the heating tank (42) to form a heating chamber, the fan (41) is connected to the heating cover (43) through a connecting tank, and is connected to the heating chamber; a heating wire (44) is provided in the heating chamber, and a temperature controller (45) is also provided on one side of the heating tank (42), and the temperature controller (45) is electrically connected to the heating wire (44).

7. The gas water heater heat exchanger air tightness detection device according to claim 6, characterized in that: The inflation component also includes an air injection nozzle (46), a slide rail (51) is provided between the two groups of the screw slides (22), an electric slider (52) is slidably provided on the slide rail (51), a partition (53) is provided on the electric slider (52), an electric lifting rod (54) is provided on one side of the partition (53), and a fixed claw (55) is provided on the other side, one end of the fixed claw (55) passes through the partition (53) and is connected to the axial end of the electric lifting rod (54), the air injection nozzle (46) is clamped in the fixed claw (55), and is connected to the heating tank (42) through a connecting pipe.

8. The gas water heater heat exchanger air tightness detection device according to claim 1, characterized in that: The workbench (11) and the protective shell (12) are both provided with a support rod (14), a support platform (15) is provided on the support rod (14), the support platform (15) is arranged in an inclined shape, and the thermal imager (24) is installed on the support platform (15).

9. The gas water heater heat exchanger air tightness detection device according to claim 8, characterized in that: One side of the protective shell (12) is provided with a plurality of mounting slots (16), and a fan is provided in the mounting slots (16). The other side of the protective shell (12) is provided with a plurality of heat dissipation slots (17). One side of the protective shell (12) is provided with an electric sliding door (18) that can cover the access slot (13), and a visual window is provided on the electric sliding door (18).

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