Monitoring device for nitrogen flow for brazing and welding device

Abstract

The application discloses a monitoring device for nitrogen flow for brazing and a welding device, and relates to the technical field of monitoring nitrogen flow for brazing. The monitoring device comprises a cabinet body and a monitoring circuit. The monitoring circuit comprises a main switch, a power supply, a flow monitoring module, an indication module, a relay and an alarm module. The first end of the main switch is electrically connected with a power distribution circuit. The input end of the power supply is electrically connected with the second end of the main switch, and the third end of the main switch is connected with the positive pole of the output end of the power supply. One end of the indication module is connected with the fourth end of the main switch. The relay comprises a coil and a coil switch. One end of the coil is connected with the third end of the flow monitoring module, and the other end of the coil is connected with the negative pole of the output end of the power supply. One end of the coil switch is connected with the positive pole of the output end of the power supply. One end of the alarm module is connected with the other end of the coil switch, and the other end of the alarm module is connected with the negative pole of the output end of the power supply. The monitoring device is small in size, convenient to use and flexible in application scenarios.

Description

Technical Field

[0001] This application relates to the field of brazing nitrogen flow monitoring technology, and more specifically, to a nitrogen flow monitoring device and a welding device for brazing. Background Technology

[0002] Introducing nitrogen during the welding process of the refrigeration system can prevent oxidation of the copper pipes at high temperatures. During brazing, copper pipes react with oxygen in the air to produce copper oxide or cuprous oxide. Introducing nitrogen can reduce the probability of oxygen reacting with copper and improve the quality of the brazed copper pipe joints. At the same time, it protects the inner wall of the pipes and ensures smooth circulation of refrigerant and lubricating oil.

[0003] However, the applicant of this application has found that existing nitrogen flow monitoring devices need to be installed directly in the nitrogen circuit during the installation phase, which takes up a large area, is not flexible in operation, and is not easy to disassemble.

[0004] The content of the background section is merely technology known to the public and does not necessarily represent existing technology in the field. Utility Model Content

[0005] This application aims to provide a nitrogen flow monitoring device and a welding device for brazing, in order to solve the problems of existing nitrogen flow monitoring devices needing to be directly installed in the nitrogen circuit during the installation stage, which results in a large footprint, inflexible operation, and difficulty in disassembly.

[0006] According to one aspect of this application, a monitoring device for nitrogen flow rate in brazing is provided. The monitoring device includes a cabinet and a monitoring circuit. The monitoring circuit includes a main switch, a power supply, a flow monitoring module, an indicator module, a relay, and an alarm module. The main switch is fixedly mounted on the inner surface of a first side of the cabinet, and its first terminal is electrically connected to a power distribution line. The power supply is fixedly mounted on the inner surface of the first side, and its input terminal is electrically connected to the second terminal of the main switch. The power supply receives a first voltage from the power distribution line and converts the first voltage into a second voltage, and its output terminal outputs the second voltage. The third terminal of the main switch is connected to the positive terminal of the power supply's output terminal. The flow monitoring module is detachably mounted on the bottom of the cabinet, with its first terminal connected to the positive terminal of the power supply's output terminal and its second terminal connected to the negative terminal of the power supply's output terminal. The indicator module is mounted on the outer surface of a second side of the cabinet, with one end connected to the fourth terminal of the main switch and the other end connected to the negative terminal of the power supply's output terminal. The relay is fixedly mounted on the inner surface of the first side, and the relay includes a coil and a coil switch. One end of the coil is connected to the third terminal of the flow monitoring module, and the other end of the coil is connected to the negative terminal of the power supply output. One end of the coil switch is connected to the positive terminal of the power supply output. The alarm module is located on the outer surface of the second side, with one end of the alarm module connected to the other end of the coil switch and the other end of the alarm module connected to the negative terminal of the power supply output.

[0007] According to some embodiments of this application, the monitoring device further includes heat dissipation holes. These holes are located on the third and fourth sides of the cabinet and are in a grid shape.

[0008] According to some embodiments of this application, the monitoring device further includes a waterproof plate. The waterproof plate is fixedly disposed on the third and fourth sides, and the waterproof plate is a U-shaped plate that surrounds the outer periphery of the heat dissipation holes.

[0009] According to some embodiments of this application, the monitoring device also includes a handle. The handle is fixedly disposed on the outer surface of the upper surface of the cabinet, and a gap is formed between the handle and the upper surface of the cabinet.

[0010] According to some embodiments of this application, the monitoring device further includes a clamping part. One end of the clamping part is fixedly disposed on the outer surface of the first side, and the other end of the clamping part is provided with an adjustable clamp for fixing to the outer surface device.

[0011] According to some embodiments of this application, a gas passage hole is provided at the bottom of the cabinet.

[0012] According to another aspect of this application, this application also provides a welding apparatus, which includes a monitoring device for the flow rate of nitrogen gas for brazing as described above.

[0013] Through the above embodiments, the technical solution of this application monitors the flow rate of nitrogen in the nitrogen circuit through a detachable flow monitoring module, and can trigger an alarm when the flow rate of nitrogen is higher or lower than a preset range through an alarm module.

[0014] The monitoring device of this application can monitor the flow rate of nitrogen during the brazing process. Furthermore, the monitoring device is small in size, easy to use, and applicable to flexible scenarios. Attached Figure Description

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

[0016] Figure 1 A schematic diagram of a monitoring device according to an embodiment of this application is shown;

[0017] Figure 2 This illustration shows another structural schematic diagram of a monitoring device according to an embodiment of this application;

[0018] Figure 3 A cross-sectional view of a monitoring device according to an embodiment of this application is shown;

[0019] Figure 4 Another cross-sectional view of the monitoring device according to an embodiment of this application is shown;

[0020] Figure 5 A schematic diagram of the monitoring loop of a monitoring device according to an embodiment of this application is shown;

[0021] Figure 6 Another schematic diagram of the monitoring loop of the monitoring device according to an embodiment of this application is shown.

[0022] Explanation of reference numerals in the attached figures:

[0023] 10. Monitoring device; 11. Cabinet; 12. Monitoring circuit; 13. Heat dissipation hole; 14. Waterproof plate; 15. Handle; 16. Clamping part; 17. Gas wire passage hole.

[0024] Main switch 121; power supply 122; flow monitoring module 123; indicator module 124; relay 125; alarm module 126.

[0025] Coil 1251; Coil switch 1252. Detailed Implementation

[0026] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, they are provided so that this application will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar parts, and therefore repeated descriptions of them will be omitted.

[0027] The described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. Numerous specific details are provided in the following description to give a full understanding of embodiments of this disclosure. However, those skilled in the art will recognize that the technical solutions of this disclosure can be practiced without one or more of these specific details, or other methods, components, materials, devices, etc. In these cases, well-known structures, methods, devices, implementations, materials, or operations will not be shown or described in detail.

[0028] Furthermore, the terms “comprising” and “having”, and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the steps or units listed, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to such process, method, product, or apparatus.

[0029] The terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish different objects, not to describe a specific order.

[0030] The technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0031] According to one aspect of this application, a monitoring device 10 for monitoring the nitrogen flow rate during brazing is provided. See also... Figures 1-6 The monitoring device 10 includes a cabinet 11 and a monitoring loop 12.

[0032] According to the example embodiment, the cabinet 11 can be a welded PVC (Polyvinyl Chloride) frame.

[0033] See 5 and Figure 6 The monitoring circuit 12 includes a main switch 121, a power supply 122, a flow monitoring module 123, an indicator module 124, a relay 125, and an alarm module 126.

[0034] See Figure 3 and Figure 4 The main switch 121 can be fixedly installed on the inner surface of the first side of the cabinet 11. See [link / reference] Figure 5 The first terminal of the main switch 121 is electrically connected to the power distribution line. The power supply 122 is fixedly mounted on the inner surface of the first side. The input terminal of the power supply 122 is electrically connected to the second terminal of the main switch. The power supply 122 receives a first voltage from the power distribution line and converts it into a second voltage. The output terminal of the power supply 122 outputs the second voltage. The third terminal of the main switch 121 is connected to the positive terminal of the output terminal of the power supply 122.

[0035] For example, the first voltage can be the AC voltage output from the power distribution line, typically AC 220V or AC 380V. The second voltage can be DC voltage. The main switch 121 can be a circuit breaker, and the power supply 122 can be a switching power supply. When the circuit breaker is closed, the switching power supply converts the AC 380V voltage of the power distribution line to DC 24V voltage.

[0036] See Figure 3 and Figure 4 The flow monitoring module 123 is detachably mounted at the bottom of the cabinet 11. See also... Figure 6 The first terminal of the flow monitoring module 123 is connected to the positive terminal of the output terminal of the power supply 122, and the second terminal of the flow monitoring module 123 is connected to the negative terminal of the output terminal of the power supply 122.

[0037] For example, the flow monitoring module 123 can be a flow meter. The operator can install the flow meter into the nitrogen circuit, and the cabinet 11 can be placed near the nitrogen circuit.

[0038] The flow meter can detect the flow rate of nitrogen in a nitrogen circuit, display the flow rate value on the display, and output a high-level signal or a low-level signal according to the flow rate of nitrogen.

[0039] See Figure 1 , Figure 3 and Figure 4 The indicator module 124 is located on the outer surface of the second side of the cabinet 11. See also Figure 6 One end of the indicator module 124 is connected to the fourth terminal of the main switch 121, and the other end of the indicator module 124 is connected to the negative terminal of the output terminal of the power supply 122.

[0040] For example, the indicator module 124 can be an indicator light. When the main switch 121 is closed, the switch corresponding to the fourth terminal of the main switch 121 is also closed, and the indicator light illuminates. Furthermore, the flow monitoring module 123 can be powered on to detect the flow rate of nitrogen in the nitrogen circuit.

[0041] See Figure 3 and Figure 4 The relay 125 is fixedly mounted on the inner surface of the first side of the cabinet 11. (See also...) Figure 6 The relay 125 includes a coil 1251 and a coil switch 1252.

[0042] One end of coil 1251 is connected to the third terminal of flow monitoring module 123, and the other end of coil 1251 is connected to the negative terminal of power supply 122. One end of coil switch 1252 is connected to the positive terminal of power supply 122.

[0043] For example, the coil switch 1252 can be an inductive normally closed switch. When the main switch 121 is closed, the flow monitoring module 123 detects that the flow rate of nitrogen in the nitrogen circuit is within the preset range, the flow meter outputs a high level, the coil 1251 is energized, and the coil switch 1252 is closed.

[0044] The preset range can be the range of nitrogen flow rate under normal brazing conditions. The preset range can be set according to the actual brazing situation, and this application does not impose any restrictions.

[0045] See Figure 3 and Figure 4 The alarm module 126 is located on the outer surface of the second side of the cabinet 11. (See also...) Figure 6 One end of the alarm module 126 is connected to the other end of the coil switch 1252, and the other end of the alarm module 126 is connected to the negative terminal of the output of the power supply 122.

[0046] For example, the alarm module 126 can be a buzzer, which will not sound when the coil switch 1252 is closed.

[0047] If the flow monitoring module 123 detects that the flow rate of nitrogen in the nitrogen circuit is higher or lower than the preset range, the flow monitoring module 123 outputs a low level, the coil 1251 is de-energized, the coil switch 1252 is opened, and the buzzer sounds an alarm.

[0048] Through the above embodiments, the technical solution of this application monitors the flow rate of nitrogen in the nitrogen circuit through a detachable flow monitoring module, and can trigger an alarm when the flow rate of nitrogen is higher or lower than a preset range through an alarm module.

[0049] The monitoring device of this application can monitor the flow rate of nitrogen during the brazing process. It is small in size, easy to use, applicable to flexible scenarios, and has a sensitive alarm.

[0050] Optionally, see Figure 1 and Figure 2The monitoring device 10 also includes heat dissipation holes 13. The heat dissipation holes 13 are located on the third and fourth sides of the cabinet 11, and are in the form of a grid. The third and fourth sides can be opposite sides, and the two heat dissipation holes 13 can prevent the monitoring device 10 from overheating.

[0051] Optionally, see Figure 1 and Figure 2 The monitoring device 10 also includes a waterproof plate 14. The waterproof plate 14 is fixedly installed on the third and fourth sides. The waterproof plate 14 is a U-shaped plate that surrounds the outer periphery of the ventilation holes 13. The waterproof plate 14 can prevent moisture from entering the interior of the cabinet 11.

[0052] Optionally, see Figure 1 and Figure 2 The monitoring device 10 also includes a handle 15. The handle 15 is fixedly mounted on the outer surface of the upper surface of the cabinet 11, forming a gap between the handle 15 and the upper surface of the cabinet 11. The operator can move the monitoring device 10 using the handle 15 to facilitate monitoring different nitrogen circuits.

[0053] Optionally, see Figure 2 The monitoring device 10 also includes a clamping part 16. One end of the clamping part 16 is fixedly disposed on the outer surface of the first side of the cabinet 11, and the other end of the clamping part 16 is provided with an adjustable clamp for fixing to the device on the outer surface. The clamping part 16 allows the monitoring device 10 to be fixed to an external device, expanding the application scenarios of the monitoring device 10.

[0054] Optionally, see Figure 4 A gas cable passage hole 17 is provided at the bottom of the cabinet 11. The gas cable passage hole 17 allows the transmission cable of the flow monitoring module 123 to pass through easily.

[0055] The measurement process based on the monitoring device of this application is as follows:

[0056] Connect the power plug of the monitoring device to the power distribution line, close the circuit breaker to power on the monitoring device, install the flow meter into the nitrogen circuit, observe the flow data on the display screen and record it.

[0057] According to another aspect of this application, this application also provides a welding apparatus, which includes a monitoring device for the flow rate of nitrogen gas for brazing as described above.

[0058] Finally, it should be noted that the above description is merely a preferred embodiment of this application and is not intended to limit this application. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions of the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A monitoring device for the flow of nitrogen gas for brazing, characterized in that, The monitoring device includes: Cabinet; The monitoring loop includes: The main switch is fixedly installed on the inner surface of the first side of the cabinet, and the first end of the main switch is electrically connected to the power distribution line. A power supply is fixedly disposed on the inner surface of the first side. The input terminal of the power supply is electrically connected to the second terminal of the main switch. The power supply obtains a first voltage from the power distribution line and converts the first voltage into a second voltage. The output terminal of the power supply outputs the second voltage. The third terminal of the main switch is connected to the positive terminal of the power supply output. A flow monitoring module is detachably mounted at the bottom of the cabinet. The first end of the flow monitoring module is connected to the positive terminal of the power supply output, and the second end of the flow monitoring module is connected to the negative terminal of the power supply output. An indicator module is disposed on the outer surface of the second side of the cabinet. One end of the indicator module is connected to the fourth terminal of the main switch, and the other end of the indicator module is connected to the negative terminal of the power supply output. A relay, fixedly disposed on the inner surface of the first side, includes: One end of the coil is connected to the third terminal of the flow monitoring module, and the other end of the coil is connected to the negative terminal of the power supply output. A coil switch, one end of which is connected to the positive terminal of the power supply output; An alarm module is disposed on the outer surface of the second side. One end of the alarm module is connected to the other end of the coil switch, and the other end of the alarm module is connected to the negative terminal of the power supply output.

2. The monitoring device of claim 1, wherein, The monitoring device also includes: Ventilation holes are provided on the third and fourth sides of the cabinet, and the ventilation holes are in the form of a grid.

3. The monitoring device of claim 2, wherein, The monitoring device also includes: A waterproof plate is fixedly installed on the third side and the fourth side. The waterproof plate is a U-shaped plate that surrounds the outer periphery of the heat dissipation hole.

4. The monitoring device of claim 1, wherein, The monitoring device also includes: A handle is fixedly installed on the outer surface of the upper surface of the cabinet, and a gap is formed between the handle and the upper surface of the cabinet.

5. The monitoring device of claim 1, wherein, The monitoring device also includes: The clamping part has one end fixedly disposed on the outer surface of the first side, and the other end of the clamping part is provided with an adjustable clamp, which is used to fix the device on the outer surface.

6. The monitoring device according to claim 1, characterized in that, The bottom of the cabinet is provided with a gas passage hole.

7. A welding apparatus, characterized in that, Includes a nitrogen flow monitoring device as described in any one of claims 1-6.

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