Welding fixture and welding method for pipeline assembly

Abstract

The present invention relates to a welding fixture and welding method for a pipe assembly. The pipe assembly is part of an air conditioner evaporator and includes at least a pipe bend and a sealing cap. The welding fixture comprises a base, a positioning bracket disposed on the base, and a limiting component disposed on the base and separate from the positioning bracket. The limiting component accommodates and positions the sealing cap, enabling the positioning bracket to support the pipe bend and force the pipe bend to plug or dock with the sealing cap. The welding fixture and welding method for a pipe assembly provided by the present invention solve the problem of requiring a large number of operators for welding, resulting in high labor intensity and the risk of burns during the welding process.

Description

Technical Field

[0001] The present invention belongs to the technical field of pipeline welding, and in particular relates to a welding fixture for a pipeline assembly and a welding method for a pipeline assembly. Background Art

[0002] The air conditioner evaporator is a type of evaporator. The function of the air conditioner evaporator is to use the liquid low-temperature refrigerant to evaporate easily under low pressure, turning into steam and absorbing the heat of the cooled medium to achieve the purpose of cooling.

[0003] The piping assembly is a key component of an air conditioner evaporator. It primarily consists of a pipe elbow, a cap welded to the elbow, and a fluorine injection nozzle welded to the cap. When welding the elbow and cap, one operator uses pliers to maintain the elbow and cap in a plugged or docked position while another operator welds the two together. This method not only requires more operators, increasing the labor intensity, but also increases the risk of burns during welding. Summary of the Invention

[0004] In order to solve all or part of the above problems, the purpose of the present invention is to provide a welding fixture for a pipeline assembly and a welding method for a pipeline assembly, which are used to solve the problem that the welding operation requires a large number of operators, the operators have high labor intensity and are easily burned during the welding process.

[0005] According to a first aspect of the present invention, a welding fixture for a pipeline assembly is provided, wherein the pipeline assembly is a partial structure of an air-conditioning evaporator and includes at least a bent pipe and a sealing cap, and the welding fixture includes a base, a positioning bracket provided on the base, and a limiting component provided on the base and separated from the positioning bracket, wherein the limiting component can accommodate and position the sealing cap, so that the positioning bracket can support the bent pipe and force the bent pipe to be plugged or docked with the sealing cap.

[0006] Furthermore, the positioning bracket includes a vertical rod provided on the base and a fixed or adjustably horizontal rod provided on the vertical rod.

[0007] Furthermore, there are multiple positioning brackets, and the multiple positioning brackets are arranged on the base at intervals.

[0008] Furthermore, the positioning bracket also includes a sleeve body that is sleeved on the vertical rod and carries the horizontal rod, and an adjustment bolt that can be screwed into the sleeve body and fixed to the vertical rod.

[0009] Furthermore, each positioning bracket includes two horizontal rods, and the two horizontal rods are spaced apart along the circumference of the sleeve body, and the two horizontal rods are in the same horizontal plane but not collinear.

[0010] Furthermore, the welding fixture further includes a first vertical baffle provided on the base and a second vertical baffle provided on the base and vertically connected to the first vertical baffle.

[0011] Furthermore, the welding fixture further includes a third vertical baffle provided on the base and vertically connected to the second vertical baffle.

[0012] Furthermore, the limiting component has a tapered cavity capable of partially accommodating the sealing cap.

[0013] Furthermore, the welding fixture also includes a gas injection mechanism connected to the limiting component, and the gas injection mechanism can inject welding shielding gas into the sealing cap and the bent pipe in sequence through the limiting component after the sealing cap and the bent pipe are docked or plugged together.

[0014] Furthermore, the welding fixture further includes a semi-finished product storage component provided on the base and / or a finished product storage component provided on the base.

[0015] Furthermore, the welding fixture further comprises an auxiliary sleeve sleeved outside the limiting component, the auxiliary sleeve is higher than the limiting component, and can accommodate and position the sealing cap together with the limiting component.

[0016] According to a second aspect of the present invention, a method for welding a pipeline assembly is provided. The welding method uses the welding fixture provided by the first aspect of the present invention.

[0017] According to the welding fixture of the pipeline assembly involved in the first aspect of the present invention, it mainly accommodates and positions the sealing cap of the pipeline assembly through a limiting component, and then supports the elbow of the pipeline assembly through a positioning bracket to force the elbow and the sealing cap to be plugged or docked. In this way, the welding fixture can effectively replace an operator to maintain the elbow and the sealing cap in a plugged or docked state, ensuring that one operator can position and weld the sealing cap and the elbow of the pipeline assembly, effectively reducing the number of operators required for the welding operation, which can reduce the labor intensity of the operator while reducing the risk of the operator being burned during the welding process. In addition, the welding fixture has a simple structure, is easy to assemble, and is safe and reliable to use, making it easy to implement and promote.

[0018] The welding method of the pipeline assembly involved in the second aspect of the present invention has the same beneficial effects as the welding fixture of the pipeline assembly involved in the first aspect of the present invention, that is, the welding fixture is used to replace an operator to maintain the elbow and the cap in a plugged or docked state, ensuring that one operator can position and weld the cap and the elbow of the pipeline assembly, effectively reducing the number of operators required for the welding operation, which can reduce the labor intensity of the operator while reducing the risk of the operator being burned during the welding process. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. In the drawings:

[0020] Figure 1 is a three-dimensional diagram of a welding fixture for welding a pipeline assembly according to an embodiment of the present invention;

[0021] Figure 2 A front view of a welding fixture for welding a pipeline assembly according to an embodiment of the present invention;

[0022] Figure 3 Shows Figure 1 the straight stem, sleeve, and adjusting bolt of the welding fixture shown;

[0023] Figure 4 This is a diagram of a first usage state of a welding fixture for welding a pipeline assembly according to an embodiment of the present invention;

[0024] Figure 5 This is a diagram of a second usage state of a welding fixture for welding a pipeline assembly according to an embodiment of the present invention.

[0025] In the drawings, like reference numerals are used for like parts, but the drawings are not necessarily drawn to scale. DETAILED DESCRIPTION

[0026] The present invention will be further described below with reference to the accompanying drawings.

[0027] Figure 1 is a three-dimensional diagram of a welding fixture for welding a pipeline assembly according to an embodiment of the present invention; Figure 2 FIG1 is a front view of a welding fixture for welding a pipeline assembly according to an embodiment of the present invention. Figure 1 and Figure 2As shown, an embodiment of the present invention provides a welding fixture 100 for welding a pipe assembly, wherein the pipe assembly is a partial structure of an air-conditioning evaporator and includes at least a bend 220 and a cap 210. The welding fixture 100 includes a base 10, a positioning bracket 20 and a limiting component 30. The positioning bracket 20 is provided on the base 10, and the limiting component 30 is also provided on the base 10 and is separated from the positioning bracket 20. The limiting component 30 can accommodate and position the cap 210, so that the positioning bracket 20 can support the bend 220 and force the bend 220 to be plugged in or docked with the cap 210. The base 10 can be optionally a solid block structure, but in order to save costs, it is recommended to preferably have a structure similar to a cabinet or a table.

[0028] That is, the welding fixture 100 mainly accommodates and positions the sealing cap 210 of the pipeline assembly through the limiting component 30, and then supports the elbow 220 of the pipeline assembly through the positioning bracket 20 to force the elbow 220 to be plugged or docked with the sealing cap 210. As a result, the welding fixture 100 can effectively replace one operator to maintain the elbow 220 and the sealing cap 210 in a plugged or docked state, ensuring that one operator can position and weld the sealing cap 210 and the elbow 220 of the pipeline assembly, effectively reducing the number of operators required for the welding operation, which can reduce the labor intensity of the operator while reducing the risk of the operator being burned during the welding process. In addition, the welding fixture 100 has a simple structure, is easy to assemble, and is safe and reliable to use, making it easy to implement and promote.

[0029] In this embodiment, the positioning bracket 20 includes a vertical rod 21 provided on the base 10 and a horizontal rod 22 fixedly or adjustably provided on the vertical rod 21. When the connection between the vertical rod 21 and the horizontal rod 22 is selected as a fixed connection, the fixed connection between the two can be selected as welding or integral manufacturing. When the connection between the vertical rod 21 and the horizontal rod 22 is selected as an adjustable connection, the adjustable connection between the two can be selected as Figure 3The illustrated structure, i.e., the positioning bracket 20, further includes a sleeve 23 that is sleeved over the vertical rod 21 and carries the horizontal rod 22, and an adjustment bolt 24 that can be screwed into the sleeve 23 and secured to the vertical rod 21. When adapting to a curved pipe 220 of different size and / or structure, the adjustment bolt 24 must first be loosened. The sleeve 23 and the horizontal rod 22 it carries must then be manipulated to slide and rotate on the vertical rod 21 to adjust the height and orientation of the horizontal rod 22 until the height and orientation of the horizontal rod 22 meet the positioning requirements of the curved pipe 220. The adjustment bolt 24 is then tightened to secure the position and height of the horizontal rod 22. It should be noted that if the sleeve 23 is too thin, the adjustment bolt 24 may be difficult to securely screw into the internal threaded hole of the sleeve 23. In this case, a radially outwardly extending reinforcement sleeve can be added to the internal threaded hole of the sleeve 23 to extend the internal threaded hole, thereby improving the reliability of the adjustment bolt 24 during use.

[0030] In this embodiment, the number of positioning brackets 20 can be one or more. When there is only one positioning bracket 20, a horizontal rod 22 of the positioning bracket 20 can be used to position the elbow 220. For example, one end of the elbow 220 (e.g., an L-shaped tube) can be placed on the horizontal rod 22, and then the other end of the elbow 220 can be manipulated to plug or dock with the sealing cap 210 placed in the limiting component 30. In this way, the positioning bracket 20 and the limiting component 30 can be used to maintain the elbow 220 and the sealing cap 210 in a plugged or docked state, ensuring smooth and safe implementation of the welding operation. For details, see Figure 5 When there are multiple positioning brackets 20, the multiple positioning brackets 20 are arranged on the base 10 at intervals, so that the horizontal rods 22 of the multiple positioning brackets 20 can be used to coordinate the positioning of the elbow 220. For example, one end of the elbow 220 (such as a twisted Z-shaped tube) is simultaneously overlapped with the horizontal rods 22 of multiple positioning brackets 20, and then the other end of the elbow 220 is manipulated to be plugged or docked with the sealing cap 210 placed in the limiting component 30. In this way, these positioning brackets 20 and the limiting component 30 can be used to maintain the elbow 220 and the sealing cap 210 in a plugged or docked state, ensuring the smooth and safe implementation of the welding operation.

[0031] In this embodiment, each positioning bracket 20 includes at least one horizontal rod 22, but preferably includes only two horizontal rods 22. Conventional air conditioner evaporator piping assemblies include, in addition to the elbow 220 and the sealing cap 210, a fluorine injection nozzle 230. To ensure that the welding fixture 100 is suitable for positioning the fluorine injection nozzle 230 and the sealing cap 210, each positioning bracket 20 includes two horizontal rods 22. The two horizontal rods 22 are spaced apart along the circumference of the sleeve 23 and are located in the same horizontal plane but not collinear. After the sealing cap 210 is welded to the elbow 220, the fluorine injection nozzle 230 is inserted into the center hole of the sealing cap 210, and then one end of the elbow 220 is placed against the base 10. Then, 3-4 horizontal rods 22 (from two adjacent positioning brackets 20) are used to jointly constrain the other end of the elbow 220, so that the elbow 220, the sealing cap 210 and the fluorine injection nozzle 230 inserted into the sealing cap 210 can be erected on the base 10 and maintain this state, so that the operator can weld the fluorine injection nozzle 230 and the sealing cap 210.

[0032] In this embodiment, the welding fixture 100 further includes a first vertical baffle 41 disposed on the base 10 and a second vertical baffle 42 disposed on the base 10 and vertically connected to the first vertical baffle 41. The welded pipe assembly can be erected on the base 10 and simultaneously lean against the first vertical baffle 41 and the second vertical baffle 42, thereby maintaining the pipe assembly in an upright position with the aid of the first vertical baffle 41 and the second vertical baffle 42. If necessary, the first vertical baffle 41 and the second vertical baffle 42 can also ensure that the elbow 220, the sealing cap 210, and the fluorine injection nozzle 230 inserted into the sealing cap 210 can be erected on the base 10 and maintained in this position, so that the operator can weld the fluorine injection nozzle 230 and the sealing cap 210.

[0033] like Figure 1 As shown, in this embodiment, the welding fixture 100 further includes a third vertical baffle 43 disposed on the base 10 and vertically connected to the second vertical baffle 42. The use of the third vertical baffle 43 and the second vertical baffle 42 is substantially the same as that of the first vertical baffle 41 and the second vertical baffle 42. For details, please refer to the description in the previous paragraph and will not be repeated here. The first vertical baffle 41, the second vertical baffle 42, and the third vertical baffle 43 are preferably made of stainless steel, which is inexpensive and readily available.

[0034] In this embodiment, the limiting component 30 has a tapered cavity that can partially accommodate the sealing cap 210. The tapered cavity can accommodate sealing caps 210 of different diameters without replacing the limiting component 30, thereby increasing the applicability of the welding fixture 100. Preferably, the welding fixture 100 also includes an auxiliary sleeve 50 that is mounted outside the limiting component 30. The auxiliary sleeve 50 is higher than the limiting component 30 and can, together with the limiting component 30, accommodate and position the sealing cap 210, preventing the sealing cap 210 from tilting and improving the positioning effect of the welding fixture 100 on the sealing cap 210.

[0035] In this embodiment, the welding fixture 100 further includes a gas injection mechanism 60 connected to the limiting component 30, see Figure 2 The gas injection mechanism 60 can sequentially inject welding shielding gas (e.g., nitrogen) into the sealing cap 210 and the elbow 220 through the limiting component 30 after the sealing cap 210 and the elbow 220 are docked or plugged together, thereby improving the welding quality of the sealing cap 210 and the elbow 220. The gas injection mechanism 60 can be any device capable of outputting welding shielding gas, such as a container for storing welding shielding gas, a gas supply pipe connected to the limiting component 30, and a delivery pump connecting the container and the gas supply pipe.

[0036] In this embodiment, the welding fixture 100 further includes a semi-finished product storage component and / or a finished product storage component 70 provided on the base 10. The semi-finished product storage component is used to store the semi-finished product formed by welding the sealing cap 210 and the elbow 220, while the finished product storage component 70 is used to store the pipe assembly of the air conditioner evaporator. Both the semi-finished product storage component and the finished product storage component 70 can be selected as a flat plate structure, a box structure or a platform support structure (for example, composed of four legs and a rectangular frame, see Figure 1 ).

[0037] In this embodiment, the welding fixture 100 further includes multiple sets of position-limiting components 30 and corresponding positioning brackets 20. Providing multiple sets of position-limiting components 30 and corresponding positioning brackets 20 in the welding fixture 100 allows the operator to position multiple sets of pipeline assemblies at a time, enabling simultaneous welding of multiple sets of pipeline assemblies, thereby improving production efficiency.

[0038] In an unillustrated embodiment of the present invention, a method for welding a pipe assembly is provided, wherein the method utilizes the welding fixture 100 described in any of the aforementioned embodiments. Precisely because the method utilizes the welding fixture 100 described in any of the aforementioned embodiments, the method utilizes the beneficial effects of the welding fixture 100, namely, utilizing the welding fixture 100 to replace an operator in maintaining the elbow 220 and the sealing cap 210 in a plugged or docked state, thereby ensuring that a single operator can position and weld the sealing cap 210 and the elbow 220 of the pipe assembly, effectively reducing the number of operators required for the welding operation. This reduces the operator's labor intensity while also reducing the risk of burns during the welding process.

[0039] In the description of this application, it should be understood that the terms "vertical" and "horizontal" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only used to facilitate the description of the present invention and simplify the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0040] In addition, the terms "first," "second," etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. In the description of the present invention, "plurality" means more than two, unless otherwise specifically defined.

[0041] In this application, unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be understood in a broad sense. For example, they may refer to fixed or detachable connections, or integration; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0042] The above is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily make changes or modifications within the technical scope disclosed in the present invention, and such changes or modifications should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims. As long as there is no structural conflict, the various technical features mentioned in each embodiment can be combined in any way. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A welding fixture for a pipe assembly, wherein the pipe assembly is a part of an air conditioner evaporator and comprises at least a bend pipe and a sealing cap, characterized in that: The welding fixture includes a base, a positioning bracket provided on the base, and a limiting component provided on the base and separated from the positioning bracket, wherein the limiting component can accommodate and position the sealing cap, so that the positioning bracket can support the bent pipe and force the bent pipe to be plugged or docked with the sealing cap; The positioning bracket includes a vertical rod provided on the base and an adjustably provided horizontal rod provided on the vertical rod, wherein the horizontal rod is used for overlapping the bent pipes; The positioning bracket further includes a sleeve body that is sleeved on the vertical rod and carries the horizontal rod, and an adjustment bolt that can be screwed into the sleeve body and fixed to the vertical rod, and the height and direction of the horizontal rod can be adjusted by the adjustment bolt; The bent pipe is a Z-shaped pipe; There are multiple positioning brackets, and the multiple positioning brackets are arranged on the base at intervals; The multiple positioning brackets are used to coordinate the real-time positioning of the bent pipe. When the bent pipe is a Z-shaped pipe, one end of the Z-shaped pipe is overlapped on the horizontal bars of the multiple positioning brackets, and the other end of the Z-shaped pipe is plugged or docked with the sealing cap placed in the limiting component.

2. The welding fixture according to claim 1, characterized in that Each positioning bracket includes two horizontal rods, which are spaced apart along the circumference of the sleeve body and are located in the same horizontal plane but not collinear.

3. The welding jig according to any one of claims 1 to 2, characterized in that: It also includes a first vertical baffle provided on the base and a second vertical baffle provided on the base and vertically connected to the first vertical baffle.

4. The welding fixture according to claim 3, characterized in that It also includes a third vertical baffle disposed on the base and vertically connected to the second vertical baffle.

5. The welding jig according to any one of claims 1 to 2, characterized in that: The limiting component has a tapered cavity capable of partially accommodating the sealing cap.

6. The welding jig according to any one of claims 1 to 2, characterized in that: It also includes a gas injection mechanism connected to the limiting component, which can inject welding shielding gas into the sealing cap and the bent pipe in sequence through the limiting component after the sealing cap and the bent pipe are docked or plugged together.

7. The welding jig according to any one of claims 1 to 2, characterized in that: It also includes a semi-finished product storage component arranged on the base and / or a finished product storage component arranged on the base.

8. The welding jig according to any one of claims 1 to 2, characterized in that: It also includes an auxiliary sleeve sleeved outside the limiting component, the auxiliary sleeve is higher than the limiting component, and can accommodate and position the sealing cap together with the limiting component.

9. A welding method for a pipeline assembly, characterized in that: The welding method uses the welding jig according to any one of claims 1 to 8.

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