Welding tool

Abstract

The utility model relates to a welding tool which comprises a base, a supporting piece and a waist clamping positioning piece, and an operation face is formed on the base. The supporting piece is vertically arranged on the operation face, and the outer diameter of the supporting piece is smaller than the inner diameter of a port of the one-way valve. The waist clamping positioning piece is connected to the base and comprises a waist clamping vertical frame and a waist clamping positioning part, and a waist clamping concave part is formed in the waist clamping positioning part; a clamping waist is arranged on the outer wall of the one-way valve; the position of the clamping waist deviates from the middle position of the one-way valve; when the one-way valve is placed at a correct position, the clamping waist on the outer wall of the one-way valve corresponds to the position of the clamping waist concave part on the clamping waist positioning piece, the welding direction of the one-way valve is proved to be correct, when the one-way valve is placed reversely, the clamping waist does not correspond to the position of the clamping waist positioning piece, the direction of the one-way valve can be easily judged by wiping personnel, and the welding accuracy is improved; the situation of reverse welding and wrong welding is avoided, and error cost is reduced.

Description

Technical Field

[0001] This utility model belongs to the technical field of air conditioner parts processing equipment, and in particular relates to a welding fixture. Background Technology

[0002] An air conditioner is a device that connects a compressor, condenser, expansion valve, and evaporator through piping, and uses the heat absorption or release that occurs when the refrigerant circulating in the system is vaporized or liquefied to cool or heat the surrounding environment.

[0003] One-way valves are common components in refrigeration systems, installed in the circulation path. When refrigerant flows forward through the one-way valve, it allows the refrigerant to pass through. When refrigerant flows backward through the one-way valve, it prevents the refrigerant from flowing through, thus preventing backflow. Therefore, the installation direction of the one-way valve in the refrigeration system is particularly important; the orientation of its connection to the piping in the refrigeration system determines the direction of refrigerant delivery.

[0004] The external structures at both ends of the check valve are similar. When welding the check valve to the pipeline fittings, due to the operator's experience and mistakes, the valve port of the check valve is often welded in reverse, which leads to the scrapping of the check valve and pipeline fittings, resulting in material waste and increased costs. Summary of the Invention

[0005] The purpose of this utility model is to provide a welding fixture to solve the problems of easy reverse welding when welding one-way valves and pipe fittings in existing air conditioners, resulting in scrapping of one-way valves and pipe fittings and increased costs.

[0006] To achieve the above-mentioned objectives, the present invention employs the following technical solution:

[0007] In one aspect, this utility model proposes a welding fixture, which includes:

[0008] A base on which an operating surface is formed;

[0009] A support member is vertically disposed on the operating surface, and the outer diameter of the support member is smaller than the inner diameter of the port of the one-way valve.

[0010] A waist-clamping positioning component is connected to the base. The waist-clamping positioning component includes a waist-clamping support frame and a waist-clamping positioning part disposed on the top of the waist-clamping support frame. A waist-clamping recess is formed on the waist-clamping positioning part, and the waist-clamping recess is located directly above the support component.

[0011] In some embodiments of this application, a protective member is provided on the outer periphery of the support member. The protective member includes a plurality of vertically arranged protective plates, and the distance between the protective plates and the center line of the support member is not less than the maximum radius of the one-way valve.

[0012] The check valve is located between the support and the protective element. The protective element provides further restraint to the check valve and improves the stability of the welding process between the check valve and the pipeline components.

[0013] In some embodiments of this application, a through-hole inflation channel is formed inside the support member, and a nitrogen-filling pipeline is connected to the bottom of the support member.

[0014] Nitrogen gas is supplied to the check valve and pipe fittings through nitrogen-filled pipelines and channels. The main purpose of purging with nitrogen before welding is to prevent oxide scale from forming on the inner walls of the pipe fittings and check valves at high temperatures. Nitrogen gas is chemically very stable and can isolate the copper pipe from oxygen, thereby preventing oxidation of the copper pipe during welding and the formation of oxides.

[0015] In some embodiments of this application, a solder positioning component is further provided on the operating surface. The solder positioning component includes a solder stand and a solder positioning part disposed on the top of the solder stand. The solder stand is disposed on the side of the support member. The solder positioning part extends horizontally to directly above the support member. A solder recess is formed on the solder positioning part, and the solder recess is located directly above the support member.

[0016] The brazing filler is used to position the check valve and the pipeline fitting for welding. When the check valve is placed in the correct orientation, the connection position between the check valve and the pipeline fitting is located below the brazing filler recess and at a certain distance from the brazing filler recess, which facilitates the welding operation. When the check valve is placed in reverse, the connection position between the check valve and the pipeline fitting is flush with the brazing filler recess, which interferes with the welding and helps to remind the operator.

[0017] In some embodiments of this application, the brazing stand is further provided with an auxiliary positioning part, and the auxiliary positioning part has a positioning arc surface for positioning the pipeline component connected to the one-way valve.

[0018] The positioning arc surface on the auxiliary positioning component is perpendicular to the operating surface, and the outer wall of the pipeline component is supported on the positioning arc surface to position the pipeline component relative to the one-way valve, thereby improving the welding quality.

[0019] In some embodiments of this application, the base is further provided with a nitrogen-filled support member, an inflation channel is formed inside the nitrogen-filled support member, a nitrogen-filled pipeline is connected to the nitrogen-filled support member, and the nitrogen-filled pipeline is connected to the inflation channel.

[0020] The other end of the pipeline is connected to the nitrogen-filled support. Nitrogen gas is transported to the pipeline and some check valves through the nitrogen-filled pipeline and gas filling channel. The main purpose of nitrogen filling before welding is to prevent oxide scale from forming on the inner wall of the pipeline and check valve at high temperature.

[0021] In some embodiments of this application, a connecting protrusion is formed on the nitrogen-filled support, and a first end of the pipeline is connected to the one-way valve, and the other end is connected to the connecting protrusion.

[0022] The size of the connecting protrusion is adapted to the inner diameter of the pipe fitting, so as to facilitate the insertion of the pipe fitting into the nitrogen-filled support.

[0023] In some embodiments of this application, the operating surface is further provided with a pipeline positioning component, which includes a pipeline support and a pipeline support formed on the top of the pipeline support, and the pipeline support has an upward-opening support recess.

[0024] Pipe positioning components are used to support pipe components, which have bends in their sections located within the support recesses.

[0025] In some embodiments of this application, the bottom of the support recess is an arc-shaped structure used to support pipeline components.

[0026] On the other hand, this application also proposes a welding fixture, which includes:

[0027] A base on which an operating surface is formed;

[0028] A support member is vertically disposed on the operating surface, and the valve port of the one-way valve is used to be inserted into the support member;

[0029] Waist-clamping positioning component, which is connected to the base, the waist-clamping positioning component includes a waist-clamping support frame and a waist-clamping positioning part disposed on the top of the waist-clamping support frame;

[0030] The position of the waist-mounted positioning part is configured such that when the first end of the one-way valve is inserted into the support member, the waist-mounted position on the outer wall of the one-way valve corresponds to the waist-mounted recess; when the second end of the one-way valve is inserted into the support member, the waist-mounted part is located below the waist-mounted recess.

[0031] Compared with the prior art, the advantages and positive effects of this utility model are:

[0032] The welding fixture involved in this application is used to weld a check valve to a pipeline component. It is equipped with a support and a retainer / positioning component. The retainer / positioning component is located on the outer wall of the check valve, and its position is offset from the center of the check valve. During welding, one end of the check valve is inserted into the support, and the pipeline component is welded to the other end of the check valve. When the check valve is correctly positioned, the retainer / positioning component on the outer wall of the check valve corresponds to the recessed portion of the retainer / positioning component, indicating that the welding direction of the check valve is correct. When the check valve is reversed, the retainer / positioning component does not correspond to the position of the retainer / positioning component. This allows operators to easily determine the direction of the check valve, improving welding accuracy, avoiding reverse welding and incorrect welding, and reducing error costs.

[0033] Other features and advantages of this utility model will become clearer after reading the detailed embodiments of this utility model in conjunction with the accompanying drawings. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 This is a perspective view of the welding fixture according to an embodiment;

[0036] Figure 2 This is a structural diagram of a one-way valve according to an embodiment;

[0037] Figure 3 A diagram showing the correct installation state of the check valve on the welding fixture according to the embodiment;

[0038] Figure 4 This is a diagram showing the incorrect installation of the check valve on the welding fixture according to the embodiment.

[0039] Figure 5 This is a front view of the welding fixture according to an embodiment;

[0040] Figure 6 This is a structural diagram of another embodiment of the welding fixture according to the embodiment;

[0041] Figure 7 For the one-way valve according to the embodiment in Figure 6 Installation diagram of the welding fixture in the diagram;

[0042] Figure 8 This is a structural diagram of yet another embodiment of the welding fixture according to the embodiments;

[0043] Figure 9 For check valves in Figure 8 Installation diagram of the welding fixture in the diagram;

[0044] Figure label:

[0045] 100. Base; 110. Nitrogen filling pipeline;

[0046] 200. Support component; 210. Inflation channel;

[0047] 300. Protective components;

[0048] 400, waist clamping positioning piece; 410, waist clamping stand; 420, waist clamping positioning part; 421, waist clamping concave part;

[0049] 500. Brazing filler metal positioning component; 510. Brazing filler metal support frame; 520. Brazing filler metal positioning part; 521. Brazing filler metal recess; 530. Auxiliary positioning part; 531. Positioning arc surface;

[0050] 600, Check valve; 610, First port; 620, Second port; 630, Bracket; 640, Piping fitting;

[0051] 700. Pipe positioning component; 710. Pipe support frame; 720. Pipe support; 721. Support recess;

[0052] 800. Nitrogen-filled support components. Detailed Implementation

[0053] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0054] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0055] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0056] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0057] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0058] The following disclosure provides many different embodiments or examples for implementing various structures of this invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this invention, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0059] Air conditioners execute a refrigeration cycle using a compressor, condenser, expansion valve, and evaporator. The refrigeration cycle involves a series of processes, including compression, condensation, expansion, and evaporation, to cool or heat an indoor space.

[0060] Low-temperature, low-pressure refrigerant enters the compressor through piping, where it is compressed into a high-temperature, high-pressure refrigerant gas, which is then discharged. The discharged refrigerant gas flows into the condenser. The condenser condenses the compressed refrigerant into a liquid phase, and heat is released to the surrounding environment through the condensation process.

[0061] The piping is equipped with a one-way valve to enable one-way delivery of refrigerant within the piping.

[0062] The expansion valve expands the high-temperature, high-pressure liquid refrigerant that condenses in the condenser into a low-pressure liquid refrigerant. The evaporator evaporates the expanded refrigerant in the expansion valve and returns the low-temperature, low-pressure refrigerant gas to the compressor. The evaporator achieves its cooling effect by utilizing the latent heat of refrigerant evaporation to exchange heat with the material being cooled. Throughout the cycle, the air conditioner regulates the temperature of the indoor space.

[0063] The outdoor unit of an air conditioner refers to the part of the refrigeration cycle that includes the compressor and the outdoor heat exchanger. The indoor unit of an air conditioner includes the indoor heat exchanger, and an expansion valve can be provided in either the indoor or outdoor unit.

[0064] The indoor and outdoor heat exchangers function as either condensers or evaporators. When the indoor heat exchanger is used as a condenser, the air conditioner functions as a heater in heating mode; when the indoor heat exchanger is used as an evaporator, the air conditioner functions as a cooler in cooling mode.

[0065] refer to Figures 1-3 The one-way valve 600 in the air conditioner is installed on the refrigerant delivery pipe fitting 640 to control the flow direction of the refrigerant and prevent the refrigerant from flowing in the opposite direction. Therefore, the accuracy of its installation direction on the pipe fitting 640 is particularly important. If the one-way valve 600 is installed in reverse on the pipe fitting 640, it is easy to cause the refrigerant to flow back in the pipe fitting 640, resulting in the failure of the one-way valve 600 and the pipe fitting 640.

[0066] The one-way valve 600 includes a valve body and a valve core. The valve core is installed in the valve body. The valve body has a first port 610 and a second port 620 at both ends. A recessed retainer 630 is formed on the outer wall of the valve body. The retainer 630 is located close to the second port 620.

[0067] To avoid the problem of reverse installation of the one-way valve 600, this utility model proposes a welding fixture for welding the one-way valve 600 and the pipeline component 640. The welding fixture includes a base 100, a support 200, and a waist-clamping positioning component 400.

[0068] An operating surface is formed on the base 100. The operating surface is a horizontal support platform structure, which serves as the operating foundation.

[0069] The support member 200 is vertically set on the operating surface. The outer diameter of the support member 200 is smaller than the inner diameter of the port of the one-way valve 600. When the one-way valve 600 is welded, one end of the one-way valve 600 is inserted into the support member 200.

[0070] The waist-holding positioning member 400 is connected to the base 100. The waist-holding positioning member 400 includes a waist-holding support 410 and a waist-holding positioning part 420 disposed on the top of the waist-holding support 410. The waist-holding positioning part 420 extends horizontally toward the support member 200. A waist-holding recess 421 is formed on the waist-holding positioning part 420. The waist-holding recess 421 is located directly above the support member 200.

[0071] The height of the waist-mounted positioning part 420 satisfies the following condition: when the second port 620 of the one-way valve 600 is welded to the corresponding pipeline component 640, the first port 610 is inserted into the support component 200, then the height of the waist-mounted positioning part 420 from the operating surface is adapted to the distance between the waist-mounted part 630 and the first port 610.

[0072] In other words, the correct welding position for the one-way valve 600 is the second port 620. When the second port 620 is welded to the pipeline component 640, the position of the retainer 630 matches the position of the positioning recess of the retainer 630.

[0073] refer to Figure 4 If the check valve 600 is inverted by the operator, that is, when the second port 620 of the check valve 600 is inserted into the support 200 with the second port 620 facing downwards, the waist 630 is located below the waist recess 421 in this welding state because the distance between the waist 630 and the second port 620 is relatively short. This makes it easier for the operator to identify the operation error and correct the installation direction of the check valve 600 to avoid welding errors.

[0074] Refer again Figure 1 In some embodiments of this application, in order to further improve the stability of the one-way valve 600 when it is inserted into the support member 200, a protective member 300 is provided on the outer periphery of the support member 200. The protective member 300 includes a plurality of vertically arranged protective plates, and the distance between the protective plates and the center line of the support member 200 is not less than the maximum radius of the one-way valve 600.

[0075] Specifically, the protective component 300 includes three protective plates disposed around the support component 200, forming a U-shaped protective structure between the protective plates. One end of the protective component 300 is an open structure, which facilitates the operator to observe the insertion status of the one-way valve 600 and ensures that it is inserted in place.

[0076] The check valve 600 is located between the support 200 and the protective member 300. The protective member 300 is used to provide further limiting of the check valve 600 and improve the stability of the welding process between the check valve 600 and the pipeline component 640.

[0077] The bottom of the waist support bracket 410 can be directly supported on the operating surface or installed on the top of the protective component 300.

[0078] In some embodiments of this application, a through-hole inflation channel 210 is formed in the support member 200, and the bottom of the support member 200 is connected to a nitrogen filling pipe 110.

[0079] The nitrogen filling pipeline 110 is connected to a nitrogen filling device. The nitrogen gas output by the nitrogen filling device is transported to the one-way valve 600 and the pipeline fitting 640 through the nitrogen filling pipeline 110 and the gas filling channel 210. The main purpose of nitrogen filling before welding is to prevent oxide scale from forming on the inner wall of the pipeline fitting 640 and the one-way valve 600 at high temperature.

[0080] Nitrogen is chemically very stable and can isolate copper pipes from oxygen, thus preventing oxidation and the formation of oxides during the welding process.

[0081] In some embodiments of this application, a solder positioning member 500 is also provided on the operating surface. The solder positioning member 500 includes a solder support frame 510 and a solder positioning part 520 disposed on the top of the solder support frame 510. The solder positioning part 520 extends horizontally from the top of the solder support frame 510 toward the support member 200.

[0082] refer to Figure 4 , Figure 5 The solder stand 510 is disposed on the side of the support member 200, and the solder positioning part 520 extends horizontally to the top of the support member 200. A solder recess 521 is formed on the solder positioning part 520, and the solder recess 521 is located directly above the support member 200.

[0083] refer to Figure 7 The brazing filler locator 500 is used to position the welding positions of the check valve 600 and the pipeline component 640. When the check valve 600 is placed in the correct orientation, the connection position between the check valve 600 and the pipeline component 640 is located below the brazing filler recess 521 and at a certain distance from the brazing filler recess 521, which facilitates the welding operation.

[0084] When the check valve 600 is installed in reverse, the connection position between the check valve 600 and the pipeline component 640 is flush with the brazing filler recess 521. The brazing filler recess 521 interferes with the welding, which helps to remind the operator.

[0085] Specifically, when the one-way valve 600 is correctly placed, the first port 610 is inserted into the support 200, and the second port 620 faces upward and is welded to the pipeline 640. In this state, the height of the brazing filler recess 521 is a certain distance higher than the second port 620 to facilitate welding by the operator.

[0086] When the check valve 600 is inverted, although the height of the check valve 600 itself remains unchanged, when the second port 620 is inserted into the support member 200, the internal space height of the second port 620 is inconsistent with that of the first port 610. In fact, the internal space of the second port 620 is smaller than that of the first port 610. That is, when the second port 620 is inserted into the support member 200, the highest position of the check valve 600 is higher than that of the brazing recess 521. In other words, the brazing recess 521 does not match the upward port position of the check valve 600, which also makes it easier for the operator to observe the positive and negative positions of the check valve 600.

[0087] In some embodiments of this application, the brazing stand 510 is further provided with an auxiliary positioning part 530, on which a positioning arc surface 531 is formed for limiting the position of the pipeline component 640 connected to the one-way valve 600.

[0088] The positioning arc surface 531 on the auxiliary positioning component is perpendicular to the operating surface, and the outer wall of the pipeline component 640 is supported on the positioning arc surface 531 to position the pipeline component 640 relative to the one-way valve 600, thereby improving the welding quality.

[0089] refer to Figure 6 , Figure 7 In some embodiments of this application, unlike the embodiment where the nitrogen filling pipeline 110 is located at the bottom of the support member 200, in this embodiment, a nitrogen filling support member 800 is separately provided on the base 100, an air filling channel 210 is formed inside the nitrogen filling support member 800, and the nitrogen filling pipeline 110 is connected to the nitrogen filling support member 800. The nitrogen filling pipeline 110 is connected to the air filling channel 210.

[0090] One end of the pipe fitting 640 is used to weld to the one-way valve 600, and the other end is connected to the nitrogen-filling support 800. Nitrogen gas is transported to the pipe fitting 640 and part of the one-way valve 600 through the nitrogen-filling pipe 110 and the gas filling channel 210. The main purpose of nitrogen filling before welding is to prevent oxide scale from forming on the inner wall of the pipe fitting 640 and the one-way valve 600 at high temperature.

[0091] It should be noted that the direction of the one-way valve 600 from the first port 610 to the second port 620 is forward, and airflow can pass through normally. The direction of the one-way valve 600 from the second port 620 to the first port 610 is reverse, and the one-way valve 600 is closed internally, preventing airflow from passing through.

[0092] To prevent excessive internal pressure from damaging the pipe fitting 640 and the check valve 600 when nitrogen is supplied from the pipe fitting 640 to the check valve 600, a bypass hole needs to be installed on the pipe fitting 640 to balance the internal and external pressure.

[0093] In some embodiments of this application, a connecting protrusion is formed on the nitrogen-filled support 800, a first end of the pipeline 640 is connected to the one-way valve 600, and the other end is connected to the connecting protrusion, and the upper end of the inflation channel 210 extends to the top of the connecting protrusion.

[0094] The dimensions of the connecting protrusion are adapted to the inner diameter of the pipe fitting 640 to facilitate the insertion of the pipe fitting 640 into the nitrogen-filled support 800.

[0095] refer to Figure 8 , Figure 9In some embodiments of this application, a pipeline positioning component 700 is also provided on the operating surface. The pipeline positioning component 700 includes a pipeline support 710 and a pipeline support 720 formed on the top of the pipeline support 710. A support recess 721 with an upward opening is formed on the pipeline support 720.

[0096] The pipe positioning component 700 is used to support the pipe component 640, which has a bend in the pipe section located within the support recess 721.

[0097] In some embodiments of this application, the bottom of the support recess 721 is an arc-shaped structure for supporting the pipeline component 640. The arc-shaped bottom of the support recess 721 is more conducive to the positioning and support of the pipeline component 640 and prevents the pipeline component 640 from shifting within the support recess 721.

[0098] The welding fixture involved in this application is used to weld the one-way valve 600 to the pipeline component 640. It is provided with a support 200 and a waist-positioning component 400. A waist-positioning component 630 is provided on the outer wall of the one-way valve 600. The position of the waist-positioning component 630 is offset from the middle position of the one-way valve 600.

[0099] During welding, one end of the check valve 600 is inserted into the support 200, and the pipeline 640 is welded to the other end of the check valve 600. When the check valve 600 is placed in the correct position, the waist 630 on the outer wall of the check valve 600 corresponds to the waist recess 421 on the waist positioning member 400, which proves that the welding direction of the check valve 600 is correct.

[0100] When the check valve 600 is installed in reverse, the position of the clamp 630 does not correspond to the position of the clamp positioning part 400. The operator can easily judge the direction of the check valve 600, improve the welding accuracy, avoid reverse welding and incorrect welding, and reduce error costs.

[0101] On the other hand, this application also proposes a welding fixture, which includes:

[0102] The base 100 has an operating surface formed thereon;

[0103] The support member 200 is vertically mounted on the operating surface, and the valve port of the one-way valve 600 is used to be inserted into the support member 200.

[0104] Waist positioning component 400 is connected to base 100. Waist positioning component 400 includes waist support frame 410 and waist positioning part 420 disposed on top of waist support frame 410.

[0105] The position of the waist-mounted positioning part 420 is configured such that when the first end of the one-way valve 600 is inserted into the support member 200, the waist-mounted part 630 on the outer wall of the one-way valve 600 corresponds to the waist-mounted recess 421; when the second end of the one-way valve 600 is inserted into the support member 200, the waist-mounted part 630 is located below the waist-mounted recess 421.

[0106] The waist positioning part 420 can be set in several ways, or a combination of several of them.

[0107] In the first method, the waist-clamping positioning component 400 is connected to the base 100. The waist-clamping positioning component 400 includes a waist-clamping support 410 and a waist-clamping positioning part 420 disposed on the top of the waist-clamping support 410. The waist-clamping positioning part 420 extends horizontally towards the support 200. The waist-clamping positioning part 420 is a horizontal bar structure. When the one-way valve 600 is correctly installed on the support 200, the waist-clamping positioning part 420 is flush with the waist-clamping part 630 on the one-way valve 600.

[0108] The waist positioning part 420 and the waist support frame 410 are integrally formed, which facilitates processing and installation.

[0109] The bottom of the waist support bracket 410 is fixed to the operating surface by screws or other fasteners.

[0110] Method 2: Based on Method 1 above, a solder positioning component 500 is also provided on the operating surface. The solder positioning component 500 includes a solder support frame 510 and a solder positioning part 520 provided on the top of the solder support frame 510. The solder positioning part 520 extends horizontally from the top of the solder support frame 510 towards the support member 200.

[0111] The bottom of the brazing stand 510 is also fixed to the operating surface with fasteners.

[0112] The solder stand 510 is disposed on the side of the support member 200, and the solder positioning part 520 extends horizontally to the top of the support member 200. A solder recess 521 is formed on the solder positioning part 520, and the solder recess 521 is located directly above the support member 200.

[0113] The brazing filler locator 500 is used to position the one-way valve 600 and the pipeline component 640 for welding. When the one-way valve 600 is placed in the correct orientation, the connection position between the one-way valve 600 and the pipeline component 640 is located below the brazing filler recess 521 and at a certain distance from the brazing filler recess 521, which facilitates the welding operation.

[0114] When the check valve 600 is installed in reverse, the connection position between the check valve 600 and the pipeline component 640 is flush with the brazing filler recess 521. The brazing filler recess 521 interferes with the welding, which helps to remind the operator.

[0115] Method 3: In some embodiments of this application, the brazing stand 510 is further provided with an auxiliary positioning part 530, and the auxiliary positioning part 530 has a positioning arc surface 531 formed on it, which is used to limit the pipeline component 640 connected to the one-way valve 600.

[0116] The positioning arc surface 531 on the auxiliary positioning component is perpendicular to the operating surface, and the outer wall of the pipeline component 640 is supported on the positioning arc surface 531 to position the pipeline component 640 relative to the one-way valve 600, thereby improving the welding quality.

[0117] In some embodiments of this application, unlike the embodiment where the nitrogen filling pipeline 110 is located at the bottom of the support member 200, in this embodiment, a nitrogen filling support member 800 is separately provided on the base 100, an air filling channel 210 is formed inside the nitrogen filling support member 800, and the nitrogen filling pipeline 110 is connected to the outside of the nitrogen filling support member 800. The nitrogen filling pipeline 110 is connected to the air filling channel 210.

[0118] One end of the pipe fitting 640 is used to weld to the one-way valve 600, and the other end is connected to the nitrogen-filling support 800. Nitrogen gas is transported to the pipe fitting 640 and part of the one-way valve 600 through the nitrogen-filling pipe 110 and the gas filling channel 210. The main purpose of nitrogen filling before welding is to prevent oxide scale from forming on the inner wall of the pipe fitting 640 and the one-way valve 600 at high temperature.

[0119] Whenever possible, the various aspects and features described and shown in the specification can be applied individually, and these individual aspects can serve as the subject of a divisional application.

[0120] In the description of the above embodiments, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0121] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A welding fixture, characterized by, include: A base on which an operating surface is formed; A support member is vertically disposed on the operating surface, and the outer diameter of the support member is smaller than the inner diameter of the port of the one-way valve. A waist-clamping positioning component is connected to the base. The waist-clamping positioning component includes a waist-clamping support frame and a waist-clamping positioning part disposed on the top of the waist-clamping support frame. A waist-clamping recess is formed on the waist-clamping positioning part, and the waist-clamping recess is located directly above the support component.

2. The welding fixture according to claim 1, characterized in that, The outer periphery of the support member is provided with a protective member, which includes multiple vertically arranged protective plates. The distance between the protective plates and the center line of the support member is not less than the maximum radius of the one-way valve.

3. The welding fixture according to claim 1, characterized in that, The support has a through-hole inflation channel, and the bottom of the support is connected to a nitrogen filling pipe.

4. The welding fixture according to claim 1, characterized in that, The operating surface is also provided with a solder positioning component, which includes a solder stand and a solder positioning part disposed on the top of the solder stand. The solder stand is disposed on the side of the support member, and the solder positioning part extends horizontally to the top of the support member. A solder recess is formed on the solder positioning part, and the solder recess is located directly above the support member.

5. The welding fixture according to claim 4, characterized in that, The brazing stand is also provided with an auxiliary positioning part, which has a positioning arc surface for positioning the pipeline component connected to the one-way valve.

6. The welding fixture according to claim 1, characterized in that, The base is also provided with a nitrogen-filled support component, which has an inflation channel formed inside. The nitrogen-filled support component is connected to a nitrogen-filled pipeline, which is connected to the inflation channel.

7. The welding fixture according to claim 6, characterized in that, The nitrogen-filled support has a connecting protrusion, and the first end of the pipeline is connected to the one-way valve, while the other end is connected to the connecting protrusion.

8. The welding fixture according to claim 1, characterized in that, The operating surface is also provided with a pipeline positioning component, which includes a pipeline support frame and a pipeline support portion formed on the top of the pipeline support frame. The pipeline support portion has an upward-opening support recess.

9. The welding fixture according to claim 8, characterized in that, The bottom of the support recess has an arc-shaped structure, which is used to support the pipeline components.

10. A welding fixture, characterized by, include: A base on which an operating surface is formed; A support member is vertically disposed on the operating surface, and the valve port of the one-way valve is used to be inserted into the support member; Waist-clamping positioning component, which is connected to the base, the waist-clamping positioning component includes a waist-clamping support frame and a waist-clamping positioning part disposed on the top of the waist-clamping support frame; The position of the waist-locking positioning part is configured such that when the first end of the one-way valve is inserted into the support member, the waist-locking position on the outer wall of the one-way valve corresponds to the waist-locking recess on the waist-locking positioning part; when the second end of the one-way valve is inserted into the support member, the waist-locking part is located below the waist-locking recess.

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