Nitrogen filling tool

Abstract

This invention provides a nitrogen-filling fixture for filling a piping assembly with nitrogen. The piping assembly includes a connecting pipe and a pipe, and also includes an outlet connected to the pipe. The nitrogen-filling fixture includes: a nitrogen-filling nozzle for filling the piping assembly with nitrogen; and an inspection component including an interference plate for detection. When the nitrogen-filling fixture is connected to the piping assembly, the nitrogen-filling nozzle is connected to the pipe, and the interference plate is correspondingly positioned with the outlet to detect whether a connecting pipe is present at the outlet. The nitrogen-filling fixture of this invention solves the technical problem in related technologies where elbow positions in components such as air conditioner evaporators are easily assembled incorrectly.

Description

Technical Field

[0001] This invention relates to the field of inspection tooling technology, and more specifically to a nitrogen-filling tooling. Background Technology

[0002] An air conditioner's four main components—the condenser assembly, evaporator assembly, compressor, and capillary tube—are connected by system components (piping parts, four-way valves, elbows, etc.) to form a circulating system. If the elbows are assembled incorrectly, it can easily cause blockages in the air conditioning system or inconsistencies in the inlet and outlet circuits, directly affecting the air conditioner's cooling and heating performance. Currently, elbow assembly is mainly done manually, so it's inevitable that incorrect elbow placement will occur. Furthermore, subsequent checks between operators can also lead to omissions, making it difficult to guarantee that the elbows will be perfectly aligned every time.

[0003] In the existing technology, after the elbow is assembled according to the drawing requirements, nitrogen-filled welding is performed on each circuit using nitrogen-filled tooling. If the elbow is assembled incorrectly, rework welding is required. Rework welding has welding defects such as weld blockage, overheating, and burn-through, which affects the assembly efficiency of the air conditioner and wastes manpower and material costs.

[0004] Therefore, existing technologies need further development. Summary of the Invention

[0005] The purpose of this invention is to overcome the above-mentioned technical deficiencies and provide a nitrogen-filling fixture to solve the technical problem that the elbow positions in components such as air conditioner evaporators are prone to assembly errors in related technologies.

[0006] To achieve the above technical objectives, the present invention adopts the following technical solution: a nitrogen filling fixture is provided for filling a pipeline assembly with nitrogen. The pipeline assembly includes a connecting pipe and a pipeline, and also includes an outlet connected to the pipeline. The nitrogen filling fixture includes: a nitrogen filling nozzle for filling the pipeline assembly with nitrogen; and an inspection component including an interference plate for detection. When the nitrogen filling fixture is connected to the pipeline assembly, the nitrogen filling nozzle is connected to the pipeline, and the interference plate is correspondingly set with the outlet to detect whether there is a connecting pipe at the outlet.

[0007] Furthermore, the inspection component includes a first connecting plate, the height direction of the connecting tube is set along a first preset direction, and the extension direction of the first connecting plate is perpendicular to the first preset direction; the interference plate is connected to the first connecting plate, and a preset angle is set between the interference plate and the first connecting plate.

[0008] Furthermore, the interference plate includes: an interference end face located at one end of the interference plate near the pipeline assembly; a first plate surface and a second plate surface, the interference end face being connected to the first plate surface and the second plate surface respectively, both the first plate surface and the second plate surface being arc-shaped.

[0009] Furthermore, the interference plates include multiple interference plates, which are spaced apart along the extension direction of the first connecting plate.

[0010] Furthermore, the nitrogen filling fixture includes a clearance component, which includes a connecting plate. The extending direction of the connecting plate is parallel to the extending direction of the first connecting plate. The clearance component is positioned above the connecting pipe to avoid the connecting pipe.

[0011] Furthermore, the connecting plate is bendable to allow the avoidance component to be switched to the inspection component; the lengths of the interference plate and the first connecting plate are adjustable.

[0012] Furthermore, the nitrogen-filling fixture includes an installation body and a nitrogen-filling pipeline, the nitrogen-filling pipeline being used to input nitrogen gas into the nitrogen-filling fixture; the installation body includes a first mounting hole, the extension direction of the first mounting hole being perpendicular to the extension direction of the nitrogen-filling pipeline, the first mounting hole being used to install inspection components; or, the first mounting hole being used to install avoidance components.

[0013] Furthermore, the mounting body includes a second mounting hole, the extension direction of which is perpendicular to the extension direction of the first mounting hole, and the second mounting hole is used to mount a nitrogen filling nozzle.

[0014] Furthermore, the first mounting hole is provided with an internal thread, and both the inspection component and the clearance component are provided with external threads. The clearance component and the inspection component are detachably connected to the first mounting hole respectively. The second mounting hole is provided with an internal thread, and the nitrogen filling nozzle is provided with an external thread. The nitrogen filling nozzle is detachably connected to the second mounting hole.

[0015] Furthermore, the first mounting hole includes multiple first mounting holes, which are spaced apart on the mounting body; the second mounting hole includes multiple second mounting holes, which are spaced apart on the mounting body.

[0016] Furthermore, multiple first mounting holes and multiple second mounting holes are provided one-to-one along the extension direction of the mounting body.

[0017] Furthermore, the nitrogen-filling fixture also includes a sealing screw, which is detachably connected to the first mounting hole and the second mounting hole to seal the nitrogen-filling fixture.

[0018] Beneficial effects:

[0019] 1. By setting up a nitrogen filling nozzle and an inspection component, if a connecting pipe is mistakenly installed at the outlet when the nitrogen filling nozzle is in contact with the inlet, the connecting pipe will interfere with the inspection component, preventing the nitrogen filling fixture from being in place. This indicates that the connecting pipe is installed incorrectly, allowing for timely correction of the connecting pipe's installation position and preventing the mistakenly installed connecting pipe from being welded. In this embodiment, the nitrogen filling fixture, while filling the pipeline components with nitrogen, also serves as an inspection fixture for the connecting pipe, using the nitrogen filling nozzle as a positioning point. This solves the technical problem of easy assembly errors at the elbow positions in components such as air conditioning evaporators in related technologies, improves the first-pass yield of connecting pipe assembly, prevents abnormal pipeline components from flowing into subsequent processes, and is convenient and simple to operate, improving work efficiency; at the same time, it saves labor and material costs for rework.

[0020] 2. By incorporating a bendable clearance component, when the connecting pipe position corresponding to the connecting plate needs to be adjusted to a loop outlet, or when this nitrogen-filling fixture is applied to different pipeline components, the connecting plate can be bent to change its shape. A 90° bending angle is preferred, allowing it to be switched to an inspection component. Through this design, the inspection component and the clearance component can be freely converted through deformation, improving the fixture's flexibility.

[0021] 3. By setting sealing screws, clearance components and inspection components can be flexibly installed to avoid connecting pipes on the piping assembly. Furthermore, installing sealing screws in locations where clearance components and inspection components are not required reduces the number of clearance components and inspection components used, and the threaded connection provides a better sealing effect. Attached Figure Description

[0022] Figure 1 This is a front view of the nitrogen-filling fixture used in an embodiment of the present invention;

[0023] Figure 2 This is a top view of the nitrogen-filling fixture used in an embodiment of the present invention;

[0024] Figure 3 This is a side view of the nitrogen-filling fixture used in an embodiment of the present invention;

[0025] Figure 4 This is a schematic diagram of the pipeline assembly used in an embodiment of the present invention;

[0026] Figure 5 This is a top view of the piping assembly used in an embodiment of the present invention;

[0027] Figure 6 This is a schematic diagram of the structure of the inspection component of the nitrogen-filling fixture used in an embodiment of the present invention;

[0028] Figure 7 This is a schematic diagram of the structure of another embodiment of the inspection component of the nitrogen-filling tooling used in the embodiments of the present invention;

[0029] Figure 8 This is a schematic diagram of the interference plate of the nitrogen-filling fixture used in an embodiment of the present invention.

[0030] The above figures include the following reference numerals:

[0031] 10. Piping assembly; 101. Connecting pipe; 102. Piping; 103. Outlet;

[0032] 1. Nitrogen filling nozzle; 2. Inspection component; 21. Interference plate; 211. Interference end face; 212. First plate surface; 213. Second plate surface; 22. First connecting plate; 3. Clearance component; 31. Connecting plate; 4. Mounting body; 41. Nitrogen filling pipeline; 42. First mounting hole; 43. Second mounting hole; 5. Sealing screw. Detailed Implementation

[0033] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0034] According to an embodiment of the present invention, a nitrogen-filling fixture is provided for filling a pipeline assembly 10 with nitrogen. The pipeline assembly 10 includes a connecting pipe 101 and a pipeline 102, and also includes an outlet 103 connected to the pipeline 102. Please refer to [link to relevant documentation]. Figures 1 to 8 The nitrogen filling fixture includes: a nitrogen filling nozzle 1, which is used to fill the pipeline assembly 10 with nitrogen; and an inspection component 2, which includes an interference plate 21 for detection. When the nitrogen filling fixture is connected to the pipeline assembly 10, the nitrogen filling nozzle 1 is connected to the pipeline 102, and the interference plate 21 is correspondingly set with the outlet 103 to detect whether there is a connecting pipe 101 at the outlet 103.

[0035] Specifically, the pipeline assembly 10 has multiple loops, each loop having an inlet and an outlet 103. Each loop inlet has a nitrogen filling nozzle at the corresponding position on the nitrogen filling fixture, and each loop outlet has a corresponding inspection component 2. Specifically, the connecting pipe 101 is an elbow used for the nitrogen filling pipeline.

[0036] With the above settings, when the nitrogen filling nozzle 1 abuts against the inlet, if the outlet 103 is mistakenly connected to the connecting pipe 101, the connecting pipe 101 will interfere with the inspection component 2, causing the nitrogen filling fixture in this embodiment to fail to be in place. This indicates that the connecting pipe is installed incorrectly, and the installation position of the connecting pipe 101 can be corrected in time to prevent the mistakenly installed connecting pipe from being welded. In this embodiment, the nitrogen filling fixture, while filling the pipeline components with nitrogen, can also be used as an inspection fixture for the connecting pipe 101 by using the nitrogen filling nozzle 1 as a positioning point. This solves the technical problem in related technologies that the elbow position in components such as air conditioner evaporators is prone to assembly errors.

[0037] Specifically, before nitrogen charging, adjust and install the positions of nitrogen charging nozzle 1, sealing screw 5, inspection component 2, and clearance component 3 according to the model of condenser assembly or evaporator assembly and the assembly drawing of connecting pipe 101, in order to avoid the problem of incorrect matching of connecting pipe 101.

[0038] In the nitrogen-filling fixture of this embodiment, see Figure 6 The inspection component 2 includes a first connecting plate 22, with the height direction of the connecting pipe 101 set along a first preset direction, and the extension direction of the first connecting plate 22 perpendicular to the first preset direction. An interference plate 21 is connected to the first connecting plate 22, and a preset angle is set between the interference plate 21 and the first connecting plate 22. Specifically, the first preset direction is a vertical direction, and the preset angle is preferably 90°. The connecting pipe 101 protrudes from the outlet 103. By setting this angle, the interference plate 21 is inserted into the space between the connecting pipe 101 and the outlet 103. If there is a misinstalled connecting pipe 101, the interference plate 21 can interfere with the misinstalled connecting pipe 101, causing the nitrogen filling fixture to be unable to fill the pipeline assembly with nitrogen, thereby achieving rapid detection of whether the connecting pipe is installed correctly.

[0039] In the nitrogen-filling fixture of this embodiment, see Figure 8 The interference plate 21 includes: an interference end face 211 located at one end of the interference plate 21 near the pipe assembly 10; a first plate surface 212 and a second plate surface 213, with the interference end face 211 connected to the first plate surface 212 and the second plate surface 213 respectively. Both the first plate surface 212 and the second plate surface 213 are arc-shaped. By setting the first plate surface 212 and the second plate surface 213 to arc-shaped, it is possible to avoid damage to the connecting pipe 101 by sharp chamfers when interference occurs between the inspection component 2 and the connecting pipe 101.

[0040] In the nitrogen-filling fixture of this embodiment, see Figure 7 The interference plates 21 include multiple plates, which are spaced apart along the extension direction of the first connecting plate 22. Specifically, the horizontal position or number of the interference plates 21 can be adjusted according to the number and position of the outlets in the pipeline assembly to meet the detection requirements of all outlets.

[0041] In the nitrogen-filling fixture of this embodiment, see Figure 2 The nitrogen-filling fixture includes a clearance component 3, which includes a connecting plate 31. The extending direction of the connecting plate 31 is parallel to the extending direction of the first connecting plate 22. The clearance component 3 is positioned above the connecting pipe 101 to avoid the connecting pipe 101. Specifically, preferably, the extending direction of the connecting plate 31 is parallel to the extending direction of the first connecting plate 22. In some embodiments, the connecting plate 31 cannot completely return to a straight state when bent, and the extending direction of the connecting plate 31 forms a certain angle with the extending direction of the first connecting plate 22, as long as the connecting plate and the connecting pipe do not interfere with each other.

[0042] In the nitrogen-filling fixture of this embodiment, see Figure 1-3 The connecting plate 31 is bendable to allow the avoidance component 3 to be switched to the inspection component 2; and / or, the lengths of the interference plate 21 and the first connecting plate 22 are adjustable. Specifically, when the position of the connecting pipe corresponding to the connecting plate 31 needs to be adjusted to the loop outlet 103, or when this nitrogen-filling fixture is applied to different pipeline components, the connecting plate 31 can be bent to change its shape, preferably with a bending angle of 90°, so that it can be switched to the inspection component 2. Through the above settings, the inspection component 2 and the avoidance component 3 can be freely converted through deformation, improving the flexibility of the fixture.

[0043] In the nitrogen-filling fixture of this embodiment, see Figure 1-2 The nitrogen-filling fixture includes a mounting body 4 and a nitrogen-filling pipeline 41, which is used to input nitrogen gas into the nitrogen-filling fixture. The mounting body 4 includes a first mounting hole 42, the extension direction of which is perpendicular to the extension direction of the nitrogen-filling pipeline 41. The first mounting hole 42 is used to install the inspection component 2; or, the first mounting hole 42 is used to install the avoidance component 3. In some embodiments, the inspection component 2 and the avoidance component 3 can be switched by changing their installation positions.

[0044] In the nitrogen-filling fixture of this embodiment, see Figure 1-2 The mounting body 4 includes a second mounting hole 43, the extension direction of which is perpendicular to the extension direction of the first mounting hole 42. The second mounting hole 43 is used to mount the nitrogen filling nozzle 1. By connecting both the second mounting hole 43 and the first mounting hole 42 to the mounting body 4 and ensuring their extension directions are perpendicular to each other, the surface area of ​​the mounting body 4 is fully utilized, simplifying the overall structure of the nitrogen filling fixture, making the structure more compact, saving space, and facilitating operation.

[0045] In some embodiments, the second mounting hole 43 and the first mounting hole 42 can be mounted on the bottom surface of the mounting body 4, or the second mounting hole 43 and the first mounting hole 42 can be mounted on the opposite end surface of the mounting body 4.

[0046] In the nitrogen-filling fixture of this embodiment, see Figure 1-2 The first mounting hole 42 has an internal thread, while the inspection component 2 and the clearance component 3 both have external threads. The clearance component 3 and the inspection component 2 are detachably connected to the first mounting hole 42. The second mounting hole 43 has an internal thread, and the nitrogen filling nozzle 1 has an external thread. The nitrogen filling nozzle 1 is detachably connected to the second mounting hole 43. By using threaded connections, the installation position of the nitrogen filling nozzle 1 can be flexibly adjusted, allowing the tooling to adapt to different circuits and improving its versatility. Furthermore, when accessories such as the clearance component 3, the inspection component 2, or the nitrogen filling nozzle 1 are damaged, new accessories can be easily replaced, improving maintainability.

[0047] In the nitrogen-filling fixture of this embodiment, see Figure 1-2 The mounting body 4 has multiple first mounting holes 42, which are spaced apart. Similarly, the mounting body 4 has multiple second mounting holes 43, which are also spaced apart. Specifically, the spacing between the first mounting holes 42 and the second mounting holes 43 is the same, equal to the distance between the two pipes connected to the connecting pipe on the pipe assembly 10. The first mounting holes 42 and the second mounting holes 43 are aligned end-to-end to ensure a one-to-one correspondence with the arrangement of the pipes on the pipe assembly 10, guaranteeing the correct relative positional relationship.

[0048] Specifically, by providing multiple first mounting holes 42 and second mounting holes 43, different specifications or lengths of pipe assemblies 10 can be accommodated, improving the applicability of the nitrogen filling fixture. Correspondingly, multiple clearance components 3, inspection components 2, or nitrogen filling nozzles 1 can be provided.

[0049] In the nitrogen-filling fixture of this embodiment, see Figure 1-2 Multiple first mounting holes 42 and multiple second mounting holes 43 are arranged one-to-one along the extension direction of the mounting body 4. By aligning the multiple first mounting holes 42 and multiple second mounting holes 43 end to end in their arrangement position, a one-to-one correspondence with the arrangement of pipes on the pipe assembly 10 is achieved.

[0050] In the nitrogen-filling fixture of this embodiment, see Figure 1 The nitrogen filling fixture also includes a sealing screw 5, which is detachably connected to the first mounting hole 42 and the second mounting hole 43 to seal the nitrogen filling fixture. By providing the sealing screw 5, the clearance component 3 and the inspection component 2 can be flexibly installed to avoid the connecting pipe 101 on the piping assembly 10. Furthermore, installing the sealing screw 5 at locations where the clearance component 3 and the inspection component 2 are not required reduces the amount of clearance component 3 and the inspection component 2 used, and the threaded connection achieves a better sealing effect.

[0051] Specifically, the sealing screw 5 is connected to the sealing ring to achieve a sealing effect.

[0052] Specifically, the nitrogen-filling fixture in this embodiment is made of aluminum alloy and stainless steel.

[0053] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. 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 comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0054] Optionally, specific examples in this embodiment can refer to the examples described in the above embodiments, and will not be repeated here.

[0055] The sequence numbers of the embodiments in this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0056] In the above embodiments of this application, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0057] The above description is only a preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A nitrogen-filling fixture for filling a pipeline assembly (10) with nitrogen, the pipeline assembly (10) comprising a connecting pipe (101) and a pipeline (102), and further comprising an outlet (103) connected to the pipeline (102), characterized in that, The nitrogen-filling fixture includes: A nitrogen filling nozzle (1) is used to fill the pipeline assembly (10) with nitrogen; Inspection component (2), the inspection component (2) includes an interference plate (21) for inspection; When the nitrogen filling fixture is connected to the pipeline assembly (10), the nitrogen filling nozzle (1) is connected to the pipeline (102), and the interference plate (21) is correspondingly set to the outlet (103) to detect whether there is a connecting pipe (101) at the outlet (103). The nitrogen filling fixture includes a clearance component (3), which is disposed above the connecting pipe (101) to avoid the connecting pipe (101). The clearance component (3) is bendable so that it can be switched to the inspection component (2).

2. The nitrogen-filling fixture according to claim 1, characterized in that, The inspection component (2) includes a first connecting plate (22), the height direction of the connecting pipe (101) is set along a first preset direction, and the extension direction of the first connecting plate (22) is perpendicular to the first preset direction; The interference plate (21) is connected to the first connecting plate (22), and a preset angle is provided between the interference plate (21) and the first connecting plate (22).

3. The nitrogen-filling fixture according to claim 2, characterized in that, The interference plate (21) includes: Interference end face (211), said interference end face (211) is located on the interference plate (21) at one end near the pipeline assembly (10); The first plate surface (212) and the second plate surface (213) are connected to the first plate surface (212) and the second plate surface (213) respectively. The first plate surface (212) and the second plate surface (213) are both arc-shaped.

4. The nitrogen-filling fixture according to claim 2, characterized in that, The interference plate (21) includes a plurality of interference plates (21) which are spaced apart along the extension direction of the first connecting plate (22).

5. The nitrogen-filling fixture according to claim 2, characterized in that, The avoidance component (3) includes a connecting plate (31), the extension direction of which is parallel to the extension direction of the first connecting plate (22).

6. The nitrogen-filling fixture according to claim 5, characterized in that, The connecting plate (31) is bendably configured to allow the avoidance component (3) to be switched to the inspection component (2); and / or the lengths of the interference plate (21) and the first connecting plate (22) are adjustable.

7. The nitrogen-filling fixture according to claim 5, characterized in that, The nitrogen filling fixture includes an installation body (4) and a nitrogen filling pipeline (41), which is used to input nitrogen gas into the nitrogen filling fixture; The mounting body (4) includes a first mounting hole (42), the extension direction of which is perpendicular to the extension direction of the nitrogen filling pipeline (41), and the first mounting hole (42) is used to install the inspection component (2); or, the first mounting hole (42) is used to install the avoidance component (3).

8. The nitrogen-filling fixture according to claim 7, characterized in that, The mounting body (4) includes a second mounting hole (43), the extension direction of the second mounting hole (43) is perpendicular to the extension direction of the first mounting hole (42), and the second mounting hole (43) is used to mount the nitrogen filling nozzle (1).

9. The nitrogen-filling fixture according to claim 8, characterized in that, The first mounting hole (42) is provided with an internal thread, and the inspection component (2) and the clearance component (3) are both provided with external threads. The clearance component (3) and the inspection component (2) are detachably connected to the first mounting hole (42). The second mounting hole (43) is provided with an internal thread, and the nitrogen filling nozzle (1) is provided with an external thread. The nitrogen filling nozzle (1) is detachably connected to the second mounting hole (43).

10. The nitrogen-filling fixture according to claim 8, characterized in that, The first mounting hole (42) includes a plurality of holes, and the plurality of first mounting holes (42) are spaced apart on the mounting body (4); The second mounting hole (43) includes a plurality of holes, which are spaced apart on the mounting body (4).

11. The nitrogen-filling fixture according to claim 8, characterized in that, Multiple first mounting holes (42) and multiple second mounting holes (43) are provided one-to-one along the extension direction of the mounting body (4).

12. The nitrogen-filling fixture according to claim 8, characterized in that, The nitrogen filling fixture also includes a sealing screw (5), which is detachably connected to the first mounting hole (42) and the second mounting hole (43) to seal the nitrogen filling fixture.

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