Copper pipe orifice impurity cleaning device and cleaning system

Abstract

The utility model discloses a copper pipe orifice impurity cleaning device and a cleaning system, and belongs to the technical field of copper pipe cleaning. The cleaning device comprises two nozzles, one nozzle is a combustible gas ignition combustion pipe, the other nozzle is an air pipe, the combustible gas ignition combustion pipe can spray combustible gas, and after ignition, the combustible gas can spray and burn the pipe opening of the copper pipe so that impurities such as oil stains, aluminum powder and lint at the pipe opening of the copper pipe can be removed. And then impurities generated after combustion are removed through air sprayed out of the air pipe, cleanliness of the pipe opening of the copper pipe is guaranteed, in this way, molten liquid brazing filler metal can spread and flow in welding gaps during welding, the welding quality defects such as insufficient brazing filler metal and sand holes cannot be caused, and the welding quality of the copper pipe is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of copper pipe cleaning, in particular to a copper pipe orifice impurity cleaning device and a cleaning system. Background Art

[0002] Heat exchangers are essential components of air conditioning systems and play a crucial role in the heat exchange process. Most air conditioning heat exchangers use copper tubes interlaced with aluminum foil as the heat transfer conductor for the refrigerant. The manufacturing process involves bending coiled copper tubes into a U-shape, cutting the rolled aluminum sheets into sheets using a high-speed punch, and then stacking the sheets together using U-shaped tubes. A pressure-induced cold plastic extrusion process expands the diameter of the copper tubes, achieving a tight fit between the tubes and the fins. Elbows are then welded together to form a circuit for the refrigerant, forming the basic structure of the heat exchanger.

[0003] The automatic welding process of the heat exchanger is a method of connecting the weldment by heating the weldment (elbow and copper pipe mouth) and the brazing material (welding ring) to a temperature higher than the melting point of the brazing material but lower than the melting point of the base material. The brazing material melts, while the base material remains solid. The melted liquid brazing material wets and fills the gaps between the solid base materials, and diffuses with the base materials to achieve the connection of the weldment.

[0004] However, due to the threaded inner wall of the copper tube, the plastic extrusion process results in a sharp tube mouth, which is easily contaminated with impurities such as oil, aluminum powder, and wire lint. During welding, the molten solder cannot spread and flow across the weld gap, resulting in insufficient solder and defects such as pinholes. These defects can seriously affect the performance of air conditioners. Utility Model Content

[0005] To overcome the shortcomings of existing technologies, this utility model provides a copper pipe nozzle impurity cleaning device and cleaning system. These devices address the problem that sharp copper pipe nozzles are prone to contamination with impurities such as oil, aluminum powder, and wire lint. Furthermore, during welding, the molten solder cannot spread across the weld gap, resulting in insufficient solder and pinholes. These defects can seriously affect the performance of air conditioners.

[0006] The technical solution adopted by the utility model to solve its technical problems is:

[0007] In one aspect, a device for cleaning impurities from a copper pipe orifice is provided, comprising a nozzle;

[0008] The nozzle includes a combustible gas ignition combustion tube and an air tube;

[0009] The combustible gas ignition combustion tube is used to spray and burn the copper tube mouth;

[0010] The air pipe is used for blowing air toward the orifice of the copper pipe after spraying.

[0011] Furthermore, it also includes: a mobile device;

[0012] The moving device includes a servo motor and an actuator;

[0013] The servo motor drives the actuator, and the actuator moves the nozzle.

[0014] Furthermore, the nozzle is arranged on a base, and the execution device moves the nozzle by moving the base.

[0015] Furthermore, the execution structure includes an up-and-down moving device;

[0016] The up and down moving device is used to control the up and down movement of the nozzle.

[0017] Furthermore, the execution structure includes a left-right movement device;

[0018] The left-right moving device is used to control the left-right movement of the nozzle.

[0019] Furthermore, the execution structure includes a forward and backward movement device;

[0020] The forward and backward moving device is used to control the forward and backward movement of the nozzle.

[0021] Furthermore, it also includes: sensors and PLC control systems;

[0022] The sensor is electrically connected to the PLC control system, and the PLC control system is electrically connected to the nozzle;

[0023] The sensor is used to detect whether a copper pipe exists at a preset position;

[0024] When the copper tube is present, the PLC control system controls the nozzle to start working;

[0025] When the copper tube does not exist, the PLC control system controls the nozzle to stop working.

[0026] Furthermore, it also includes: an alarm device;

[0027] The alarm device is electrically connected to the PLC control system and is used to issue prompts.

[0028] Furthermore, it also includes: a base base;

[0029] The cleaning device is placed on a preset plane through the base.

[0030] On the other hand, a cleaning system is provided, comprising: the cleaning device as described above.

[0031] This application adopts the above technical solution, which has at least the following beneficial effects:

[0032] The technical solution of the present application provides a copper pipe orifice impurity cleaning device and a cleaning system, the cleaning device includes a nozzle, and the nozzle includes two nozzles, one is a combustible gas ignition combustion tube, and the other is an air tube. The combustible gas ignition combustion tube can spray combustible gas, which can be sprayed on the copper pipe orifice after ignition to remove impurities such as oil, aluminum powder and lint at the copper pipe orifice, and then the air sprayed out by the air tube removes the impurities after combustion to ensure the cleanliness of the copper pipe orifice. In this way, the melted liquid solder during welding can spread and flow between the welding gaps, and will not cause welding quality defects such as insufficient solder and sand holes, thereby greatly improving the welding quality of the copper pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0034] Figure 1 This is a three-dimensional diagram of a copper pipe orifice impurity cleaning device provided by an embodiment of the utility model;

[0035] Figure 2 This is a front view of a copper pipe orifice impurity cleaning device provided by an embodiment of the utility model;

[0036] Figure 3 This is a side view of a copper pipe orifice impurity cleaning device provided by an embodiment of the utility model;

[0037] Figure 4 This is a top view of a copper pipe orifice impurity cleaning device provided by an embodiment of the utility model;

[0038] Figure 5 This is a three-dimensional diagram of the structure of a base and a nozzle provided by an embodiment of the utility model;

[0039] Figure 6 This is a formal diagram of the structure of a base and a nozzle provided by an embodiment of the present utility model;

[0040] Figure 7 This is a side view of a base and nozzle structure provided by an embodiment of the present utility model;

[0041] Figure 8 It is a top view of the structure of a base and a nozzle provided in an embodiment of the utility model. Description of the drawings:

[0043] 1-Servo motor; 2-Alarm device; 3-PLC control system; 4-Base; 5-Screw; 6-Nozzle; 7-Base; 8-Vertical guide rail; 9-Horizontal guide rail; 10-Rodless cylinder. DETAILED DESCRIPTION

[0044] To make the purpose, technical solutions, and advantages of this application more clear, the technical solutions of this utility model are described in detail below with reference to the accompanying drawings and examples. Obviously, the described embodiments are only some of the embodiments of this application, rather than all of them. Based on the embodiments in this application, all other implementation methods obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0045] An air conditioner is mainly composed of a compressor, a radiator, and an automatic control system. The copper tubes in the radiator are called the "blood vessels" of the air conditioner in the industry. Copper tubes have two main uses:

[0046] Make heat exchangers: such as the commonly used evaporators and condensers, commonly known as "two devices".

[0047] Make connecting pipes and fittings.

[0048] Regardless of its use, it is a channel for refrigerant and its role is very important. On the one hand, it requires copper tube manufacturers to provide high-quality copper tubes, and on the other hand, it requires air-conditioning and refrigeration companies to use copper tubes properly.

[0049] Copper pipe leakage is a fatal flaw in air conditioners. Once a leak occurs, the refrigerant in the air conditioner will overflow, and the air conditioner will fail due to lack of heat transfer medium. The causes of copper pipe leakage are relatively complex. The following are some common causes of leakage:

[0050] Manufacturing reasons:----Eddy current flaw detection missed:

[0051] GB stipulates that copper tubes must undergo 100% eddy current flaw detection and specifies the diameter of artificial defects (through holes) on the sample tubes used to calibrate the flaw detector to ensure the sensitivity of eddy current flaw detection and prevent defects exceeding the standard from being missed.

[0052] This requirement can be fully guaranteed in regular large-scale copper tube factories because the flaw detection is an online detection. This online eddy current flaw detection ensures that the entire length of the tube is eddy current tested, which is 100% flaw detection.

[0053] Some copper pipe factories do not do this, or do not conduct eddy current testing, or use low-standard eddy current flaw detectors for random inspections. As a result, copper pipes may have excessive defects that are missed or not detected, causing air conditioners to leak when users use them.

[0054] Eddy current testing detects defects, but the copper tube surface is not marked or the marking is inaccurate or unclear. During the copper tube production process, the defects detected by eddy current testing are required to be covered with ink over the defects that exceed the standard so that the user can remove the defective copper tube during use.

[0055] However, due to the insufficient adhesion of the ink selected by the manufacturer during the production process, improper adjustment of the inkjet gun, incomplete drying, and fading of the ink components when exposed to high temperatures, users are unable to pick out the defects detected by eddy current testing during use. Once a defective copper tube is used in an air conditioner, it is bound to cause leakage.

[0056] However, this solution is only used for detection and is not the actual cause of copper tube defects. In practice, it is often due to processing problems:

[0057] In the process of forming the two devices, the air conditioning main pipe has to go through the steps of bending, expanding, flaring, welding, etc.

[0058] During the pipe bending process, the bent part is subjected to local stress, causing local over-stretching, resulting in cracks, hidden cracks and other problems. Once refrigerant is filled, refrigerant leakage often occurs here.

[0059] After the copper tube passes through the fins, it needs to be expanded in a tube expanding machine. There are two types of tube expanding machines: vertical and horizontal. The vertical tube expanding machine mainly expands tubes with relatively small lengths and has a relatively high efficiency; the horizontal tube expanding machine mainly expands tubes with relatively long lengths and has a relatively low efficiency.

[0060] During the tube expansion process, the expansion core increases the size of the copper tube by interfering with the inner diameter of the copper tube, ensuring full contact between the outer diameter of the copper tube and the aluminum foil heat sink. This process can easily lead to the expansion core scratching the copper tube, causing penetration damage and causing leakage. Sometimes, due to excessive burrs on the inner hole of the aluminum foil, the burrs penetrate the copper tube during expansion, causing leakage.

[0061] Leakage caused by poor welding: After the copper tube is inserted into the perforated aluminum foil, the tubes need to be connected together, and a small elbow is needed to connect them. In order to ensure a firm connection, the small elbow and the copper tube are welded together with solder during the production process.

[0062] During welding, due to reasons such as solder quality, copper tube expansion, and foreign matter on the welding surface, the welding may be loose, resulting in cold welds and causing refrigerant leakage.

[0063] The main reasons are:

[0064] The flare is small, and the brazing solder is not easy to enter, resulting in a weak weld;

[0065] Uneven heating during welding causes some brazing solder to not be completely heated and melted;

[0066] There are substances such as oil, oxides, and carbon residue on the surface of the copper tube at the welding point;

[0067] The quality of the solder itself.

[0068] Based on the copper tube and elbow assembly welding position of the air-conditioning heat exchanger, the copper tube mouth is easily contaminated by impurities, resulting in poor welding such as insolubility and non-flow of brazing, which eventually leads to leakage problems in the air-conditioning system. This application provides a tube mouth cleaning tool to ensure the brazing quality and reduce the leakage rate of the air-conditioning system.

[0069] Reference Figure 1 、 Figure 2 、 Figure 3 and Figure 4 , the embodiment of the utility model provides a copper pipe orifice impurity cleaning device, including a nozzle 6;

[0070] The nozzle 6 includes a combustible gas ignition combustion tube and an air tube;

[0071] The combustible gas ignition combustion tube is used to spray the copper tube orifice; illustratively, the combustible gas ignition combustion tube is connected to a combustible gas, such as natural gas. It should be noted that an ignition device can be provided at the tube orifice of the combustible gas ignition combustion tube for igniting the combustible gas.

[0072] The air pipe is used to blow air to the orifice of the copper pipe after the spraying. To form the blowing, a fan can be set in the air pipe, but since the air pipe is small, it is not easy to set a fan, so the air pipe is connected to compressed air, so that air can be blown to the orifice of the copper pipe as long as the air pipe is opened.

[0073] It should be noted that the cleaning device is generally used to clean copper pipes on the assembly line. The copper pipes on the assembly line are transported along the assembly line with the pipe ends facing upwards through a special holding device. In this way, the fire generated by the combustible gas igniting the combustion pipe only burns the pipe ends and does not affect the pipe walls.

[0074] The combustible gas ignition combustion tube can spray out combustible gas. After ignition, it can be sprayed on the copper tube mouth to remove impurities such as oil, aluminum powder and lint at the copper tube mouth. Then the air sprayed out through the air pipe can remove the impurities after combustion to ensure the cleanliness of the copper tube mouth. In this way, the melted liquid solder during welding can spread and flow between the welding gaps, and will not cause welding quality defects such as insufficient solder and sand holes, thereby greatly improving the welding quality of the copper tube.

[0075] It is understandable that a valve or switch is further included to control whether the nozzle 6 is working. When the nozzle 6 is working, the combustible gas ignition combustion tube can spray the copper tube orifice, and the air tube blows air to the copper tube orifice after the spraying. When the nozzle 6 is not working, the combustible gas ignition combustion tube does not spray the copper tube orifice, and the air tube does not blow air to the copper tube orifice after the spraying.

[0076] In one embodiment, the valve or switch is manually controlled by a user.

[0077] In order to improve the level of automated production, another embodiment further includes: a sensor and a PLC control system 3;

[0078] The sensor is electrically connected to the PLC control system 3, and the PLC control system 3 is electrically connected to the nozzle 6;

[0079] The sensor is used to detect whether a copper pipe exists at a preset position; wherein the sensor can be an infrared sensor, a laser distance measuring device, or even a camera. This application does not make specific limitations here, and those skilled in the art can determine it according to actual needs.

[0080] When a copper tube is present, the PLC control system 3 controls the nozzle 6 to start working;

[0081] When the copper tube does not exist, the PLC control system 3 controls the nozzle 6 to stop working.

[0082] When there is a copper pipe on the assembly line, the nozzle 6 can be automatically controlled to work by the sensor and PLC control system 3. When there is no copper pipe, the nozzle 6 is automatically controlled to stop working.

[0083] As a preferred implementation of the present application, it further includes: an alarm device 2;

[0084] The alarm device 2 is electrically connected to the PLC control system 3 and is configured to issue a prompt. For example, when the sensor begins to detect copper pipes, the alarm device 2 sounds an alarm, prompting the user to move away from the nozzle 6. Alternatively, when the sensor detects the absence of copper pipes on the assembly line, the alarm device 2 sounds an alarm, notifying the user that the cleaning device has stopped operating.

[0085] Also includes: a base base 4;

[0086] The cleaning device is placed on a preset plane through the base pedestal 4. Generally, it is placed directly on the ground. If the copper pipe on the assembly line is higher, a pad can be placed under the base pedestal 4.

[0087] Although the cleaning device can rely on the mobile base 4 to adjust the position of the cleaning device and thus adjust the position of the nozzle 6, for some fine adjustments, only moving the base 4 may not meet the requirements, so the embodiment of the present application further includes: a moving device;

[0088] The moving device includes a servo motor 1 and an execution device;

[0089] The servo motor 1 drives the actuator, which moves the nozzle 6 .

[0090] In order to facilitate the movement of the nozzle 6, as Figure 5 、 Figure 6 、 Figure 7 and Figure 8 As shown, the present application sets the nozzle 6 on the base 7 , so that the execution device can move the nozzle 6 by moving the base 7 .

[0091] The execution structure includes an up and down moving device;

[0092] The vertical movement device is used to control the vertical movement of the nozzle 6. Specifically, the vertical movement device can adjust the height of the nozzle 6. Specifically, the vertical movement device includes a screw 5 and a vertical guide rail 8. The servo motor 1 drives the base 7 to move along the vertical guide rail 8 via the screw 5. Of course, to fix the base 7 at a certain height, a limit device is also included. The limit device can be configured according to actual needs and is not specifically limited in this application.

[0093] The execution structure includes a forward and backward moving device;

[0094] The forward and backward movement device is used to control the forward and backward movement of the nozzle 6. In other words, the forward and backward movement device can adjust the position of the nozzle 6 in the forward and backward direction. Specifically, the forward and backward movement device includes a transverse guide rail 9 and a rodless cylinder 10. The rodless cylinder 10 drives the base 7 to move forward and backward along the transverse guide rail 9.

[0095] The execution structure includes a left-right movement device;

[0096] The left-right moving device is used to control the left-right movement of the nozzle 6. The specific implementation of the left-right moving device is not limited in this application and can be set according to actual needs.

[0097] It should be noted that when the nozzle 6 moves forward and backward, the distance between the nozzle 6 and the assembly line is adjusted, while the left and right movement is to move in the direction of movement of the assembly line or in the opposite direction of movement.

[0098] Since the copper pipe is moved on the assembly line during actual operation, it is only necessary to adjust the height and front-back position of the nozzle 6 and no left-right movement is required. Therefore, the cleaning device in the figure only includes an up-and-down moving device and a front-and-back moving device.

[0099] The control flow is as follows:

[0100] Step 1: System self-check and reset

[0101] Turn on the power supply system for self-checking, including the operation of the servo motor 1, the PLC control system 3, the pipeline air pressure, the gas flow rate at the nozzle 6 end, the screw 5 guide rail linkage, etc. Reset after all drives are qualified.

[0102] Step 2: Select the corresponding parameters

[0103] The equipment manager can pre-input parameters of heat exchangers of different specifications through the PLC control system 3. During production, the equipment manager selects the corresponding code according to the material usage and sets it to automatic mode. After selection, the servo motor 1 drives the screw rod 5 to adjust the height of the base 7, and then adjusts the base 7 forward and backward through the rodless cylinder 10.

[0104] Step 3: Detection and purge

[0105] An infrared sensing device is configured at the front end of the nozzle 6, which is linked to the PLC control system 3 to monitor and purge. When it is detected that there is no material in the line, the purge work is stopped. The nozzle 6 is divided into two parts, namely the natural gas ignition combustion pipe and the medium-pressure compressed air pipe. The components are first sprayed by the natural gas combustion pipe nozzle 6 to fully burn tiny impurities such as velvet, and then flow into the next process after being purged by medium-pressure air.

[0106] Based on the same inventive concept, an embodiment of the present application further provides a cleaning system, including: a cleaning device as provided in the above embodiment.

[0107] Through precise execution and automated control of the above steps, the pipe cleaning tool can effectively improve brazing quality, enhance production efficiency, and reduce the risk of leakage in air conditioning heat exchanger systems.

[0108] It can be understood that the same or similar parts of the above embodiments can be referenced to each other, and the contents not described in detail in some embodiments can refer to the same or similar contents in other embodiments.

[0109] It should be noted that, in the description of this application, the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance. In addition, in the description of this application, unless otherwise specified, the meaning of "plurality" refers to at least two.

[0110] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0111] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A copper pipe nozzle impurity cleaning device, characterized by: Including nozzle; The nozzle includes a combustible gas ignition combustion tube and an air tube; The combustible gas ignition combustion tube is used to spray and burn the copper tube orifice; The air pipe is used for blowing air toward the orifice of the copper pipe after spraying.

2. The cleaning device according to claim 1, characterized in that Also includes: mobile devices; The moving device includes a servo motor and an actuator; The servo motor drives the actuator, and the actuator moves the nozzle.

3. The cleaning device according to claim 2, characterized in that The nozzle is arranged on a base, and the executing device moves the nozzle by moving the base.

4. The cleaning device according to claim 2, characterized in that: The execution structure includes an up and down moving device; The up and down moving device is used to control the up and down movement of the nozzle.

5. The cleaning device according to claim 2, characterized in that: The execution structure includes a left-right movement device; The left-right moving device is used to control the left-right movement of the nozzle.

6. The cleaning device according to claim 2, characterized in that: The execution structure includes a forward and backward moving device; The forward and backward moving device is used to control the forward and backward movement of the nozzle.

7. The cleaning device according to claim 1, characterized in that Also includes: Sensors and PLC control systems; The sensor is electrically connected to the PLC control system, and the PLC control system is electrically connected to the nozzle; The sensor is used to detect whether a copper pipe exists at a preset position; When the copper tube is present, the PLC control system controls the nozzle to start working; When the copper tube does not exist, the PLC control system controls the nozzle to stop working.

8. The cleaning device according to claim 7, characterized in that Also includes: an alarm device; The alarm device is electrically connected to the PLC control system and is used to issue prompts.

9. The cleaning device according to claim 1, characterized in that Also includes: base abutment; The cleaning device is placed on a preset plane through the base.

10. A cleaning system, characterized in that: include: A cleaning device as claimed in any one of claims 1 to 9.

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