A kind of cooling water electric heating device pipeline welding positioning tool

Abstract

A kind of cooling water electric heating device pipeline welding positioning tool, including lower clamping module, upper clamping module and locking bolt;Lower, upper clamping module is respectively composed of base and detachable plastic pipe clamp, cooling flow passage is equipped in base, open cooling groove is opened in the inner wall of pipe clamp, and flexible sealing lip is arranged at the edge of groove.Pipe clamp is connected with the cooling flow passage of base through water inlet and water outlet;After locking, flexible sealing lip is elastically pressed to form closed cooling chamber with the outer wall of pipe, and the interface between pipe clamp and base is also sealed, so that external cooling liquid can directly flow into closed chamber and carry out high-efficiency heat exchange with high-temperature pipe wall;The utility model greatly improves heat exchange efficiency by "contacting is sealed" mechanism and direct cooling principle, can effectively control welding deformation, completely avoids that plastic tooling is scalded, and absolutely protects workpiece surface, and has the advantages of modularization, strong versatility.

Description

Technical Field

[0001] This utility model relates to the field of welding tooling technology in mechanical manufacturing, and in particular to a welding positioning tooling for cooling water electric heating device pipelines. Background Technology

[0002] In industrial production, pipe welding connections are extremely common, especially in the manufacture of equipment such as cooling water systems and electric heating devices. It is often necessary to butt-weld two or more sections of flanged pipe to connecting parts. This welding process faces two major technical challenges: 1. Welding thermal deformation: The high temperature generated during welding will cause the pipe to expand locally due to heat. After cooling, it will generate shrinkage stress, resulting in the overall bending of the pipeline, the tilting of the flange face, or the ovality of the pipe end exceeding the tolerance, which seriously affects the assembly accuracy and sealing performance of the equipment. 2. Workpiece surface damage: Traditional metal tooling fixtures have high hardness, which makes them very easy to scratch or damage the smooth surface of the pipeline or the flange sealing surface during clamping and welding.

[0003] In the existing technology, although plastic pipe clamps are used to avoid scratching the workpiece, the plastic material has poor heat resistance. When it is close to the welding area, the high temperature can easily cause the plastic clamp to soften, melt or even burn. Not only is the lifespan short, but the risk of failure is also high. Although there have been attempts to add water cooling to the tooling, the structure is usually complex, the cooling path is roundabout, the heat exchange efficiency is low, and it cannot effectively protect the plastic clamp itself. Therefore, there is an urgent need for a new type of welding fixture that can simultaneously solve the problems of efficient heat dissipation, prevention of deformation, protection of workpiece surface, and strong adaptability. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a pipe welding positioning fixture with an ingenious structure, extremely high cooling efficiency, effective prevention of welding deformation, and no damage to the workpiece surface.

[0005] To achieve the above objectives, this utility model provides a welding positioning fixture for a cooling water electric heating device pipeline, comprising a lower clamping module, an upper clamping module, and locking bolts. The lower clamping module includes a lower base and at least two lower half-pipe clamps detachably mounted on the upper side of the lower base. The lower base has a lower cooling channel inside. The upper surface of the lower base has multiple sets of lower fixing threaded holes. The lower half-pipe clamps are made of plastic, and their inner walls have lower open cooling grooves. The bottom of the lower half-pipe clamps has a lower inlet and a lower outlet communicating with the lower cooling channel. The upper clamping module includes an upper base and at least two upper half-pipe clamps detachably mounted on the lower side of the upper base. The upper base has a lower clamping module inside. The upper cooling channel is provided; multiple sets of upper fixing holes are provided on the lower surface of the upper base; the upper half pipe clamp is made of plastic, and an upper open cooling groove is provided on the inner wall of the upper half pipe clamp; the top of the upper half pipe clamp is provided with an upper water inlet and an upper water outlet that are connected to the upper cooling channel; the edges of the lower open cooling groove and the upper open cooling groove are provided with flexible sealing lips; the locking bolt passes through the upper fixing hole, the upper half pipe clamp, and the lower half pipe clamp in sequence and is screwed into the lower fixing threaded hole; when the locking bolt is tightened, the upper cooling channel is sealed and connected to the upper water inlet and the upper water outlet, the lower cooling channel is sealed and connected to the lower water inlet and the lower water outlet, and the flexible sealing lip is pressed and sealed against the outer wall of the pipe.

[0006] Furthermore, this utility model provides a welding and positioning fixture for a cooling water electric heating device pipeline, wherein the flexible sealing lip is integrally formed from elastic rubber material and the upper and lower pipe clamps through a secondary injection molding process.

[0007] Furthermore, the present invention provides a welding and positioning fixture for a cooling water electric heating device pipeline, wherein the lower inlet and lower outlet, and the upper inlet and upper outlet are male connectors; and the interfaces between the lower cooling channel and the upper cooling channel and the pipe clamp are provided with matching female connectors with sealing rings.

[0008] Furthermore, this utility model provides a welding and positioning fixture for the pipeline of a cooling water electric heating device, wherein the plastic is polyetheretherketone or polyetherimide.

[0009] Furthermore, the present invention provides a welding and positioning fixture for a cooling water electric heating device pipeline, wherein the lower base and the upper base are made of metal sheet.

[0010] Furthermore, this utility model provides a welding and positioning fixture for the pipeline of a cooling water electric heating device, wherein the two ends of the lower cooling channel and the upper cooling channel are provided with quick interfaces for connecting external pipelines.

[0011] The welding and positioning fixture for the pipeline of the cooling water electric heating device provided by this utility model has the following advantages compared with the prior art: 1. Extreme cooling efficiency, fundamentally solving the problems of thermal deformation and tooling burn-out: The coolant directly exchanges heat with the pipe wall through open grooves, minimizing thermal resistance and maximizing heat exchange efficiency; it can instantly remove the huge heat from the welding area, greatly suppressing the welding thermal deformation of the pipeline, while creating a low-temperature working environment for the plastic pipe clamps, completely eliminating the risk of them being burned, and ensuring an extremely long service life. 2. Absolute workpiece protection: All parts in contact with the workpiece are made of plastic and flexible rubber sealing lips, with uniform clamping force, which fundamentally avoids surface damage such as scratches and indentations. It is especially suitable for thin-walled pipes, polished pipes or coated pipes. 3. "Contact-to-seal" intelligent mechanism: The design of the flexible sealing lip is one of the core innovations; it adapts to the outer diameter of the pipe fitting and automatically deforms to form a reliable seal when compressed, ensuring the airtightness of the cooling chamber, simplifying operation and improving reliability; 4. High versatility and flexibility: The distance between the two pipe clamps can be flexibly adjusted through multiple sets of fixing holes on the base, perfectly adapting to the welding of parallel pipelines with different center distances. One device can be used for multiple purposes, reducing tooling investment costs. 5. Modular quick-change design: The pipe clamp and the base are connected by quick-change male and female connectors. New workpieces can be adapted by changing pipe clamp modules of different diameters. The changeover speed is fast and the maintenance is simple. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the welding positioning fixture structure for a cooling water electric heating device pipeline according to the present invention; Figure 2 This is a schematic diagram of the changing state structure of a welding positioning fixture for a cooling water electric heating device pipeline according to the present invention; Figure 3 This is an exploded view of the welding and positioning fixture structure for a cooling water electric heating device pipeline according to this utility model.

[0013] The components include: 1. Locking bolt; 2. Lower base; 3. Lower half-pipe clamp; 4. Lower cooling channel; 5. Quick connector; 6. Lower fixing threaded hole; 7. Lower open cooling groove; 8. Lower water inlet; 9. Lower water outlet; 10. Upper base; 11. Upper half-pipe clamp; 12. Upper cooling channel; 13. Upper fixing hole; 14. Upper open cooling groove; 15. Upper water inlet; 16. Upper water outlet; 17. Flexible sealing lip. Detailed Implementation

[0014] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments and accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0015] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component 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 utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0016] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0017] like Figures 1-3As shown, this embodiment provides a welding positioning fixture for a cooling water electric heating device pipeline, which includes a lower clamping module, an upper clamping module, and a locking bolt 1. The lower clamping module includes a lower base 2 made of metal sheet and at least two lower half-pipe clamps 3 detachably mounted on the upper side of the lower base 2. The lower base 2 has a lower cooling channel 4 inside, and quick-connect interfaces 5 for connecting external pipelines are provided at both ends of the lower cooling channel 4. The upper surface of the lower base 2 has multiple sets of lower fixing threaded holes 6. The lower half-pipe clamps 3 are made of polyetheretherketone or polyetherimide plastic. Made of a material, the lower half-pipe clamp 3 has an open cooling groove 7 on its inner wall, and the bottom of the lower half-pipe clamp 3 has a lower water inlet 8 and a lower water outlet 9 that are connected to the lower cooling channel 4; the upper clamping module includes an upper base 10 made of metal plate and at least two upper half-pipe clamps 11 that are detachably installed on the lower side of the upper base 10; the upper base 10 has an upper cooling channel 12 inside, and the two ends of the upper cooling channel 12 have quick interfaces 5 for connecting to external pipelines; the lower surface of the upper base 10 has multiple sets of upper fixing holes 13. The upper pipe clamp 11 is made of plastic, and its inner wall has an upper open cooling groove 14. The top of the upper pipe clamp 11 has an upper water inlet 15 and an upper water outlet 16 that communicate with the upper cooling channel 12. The edges of the lower open cooling groove 7 and the upper open cooling groove 14 are provided with flexible sealing lips 17. The flexible sealing lips 17 are integrally formed with the upper pipe clamp 11 and the lower pipe clamp 3 by a secondary injection molding process using elastic rubber material. The locking bolt 1 passes through the upper fixing hole 13 and the upper... Half-pipe clamp 11 and lower half-pipe clamp 3 are screwed into the lower fixed threaded hole 6; when the locking bolt 1 is tightened, the upper cooling channel 12 and the upper water inlet 15 and the upper water outlet 16 are sealed and connected, the lower cooling channel 4 and the lower water inlet 8 and the lower water outlet 9 are sealed and connected, and the flexible sealing lip 17 is pressed and sealed against the outer wall of the pipe fitting; the lower water inlet 8 and the lower water outlet 9, and the upper water inlet 15 and the upper water outlet 16 are male connectors; the interfaces between the lower cooling channel 4 and the upper cooling channel 12 and the pipe clamp are provided with matching female connectors with sealing rings.

[0018] In actual manufacturing, the welding and positioning fixture for the cooling water electric heating device pipeline mainly consists of a lower clamping module, an upper clamping module, and locking bolts 1. The lower clamping module includes a long strip-shaped lower base 2, which is machined from a 20mm thick aluminum alloy plate. Two independent lower cooling channels 4 are milled inside, and quick-connect couplings are installed at both ends of the channels for connecting external cooling water pipes. Multiple sets of lower fixing threaded holes 6 are machined along the length of the upper surface of the lower base 2. The two lower pipe clamps 3 are inserted into the corresponding female heads on the lower base 2 through their male heads, namely the lower inlet 8 and the lower outlet 9, to achieve positioning and connection. An O-ring is embedded to ensure a seal. The lower half-pipe clamp 3 is made of PEEK material, and its inner wall is machined with a lower open cooling groove 7. The outer edge of the groove is integrally molded with a flexible sealing lip 17 made of high-temperature silicone rubber through secondary injection molding. The upper clamping module structure is symmetrical to the lower clamping module. It includes an upper base 10, with an upper cooling channel 12 and a quick-change connector inside. The lower surface of the upper base 10 has multiple sets of upper fixing holes 13. The two upper half-pipe clamps 11 are connected to the female head seat of the upper base 10 through their upper water inlet 15 and upper water outlet 16. The upper half-pipe clamp 11 also has an upper open cooling groove 14 and a flexible sealing lip 17. During operation, place the two flange fittings to be welded into the cavities of the two lower pipe clamps 3, align and lower the upper clamping module so that the upper pipe clamp 11 is fastened to the upper part of the fitting. Pass the locking bolt 1 through the upper fixing hole 13, the mounting hole of the upper pipe clamp 11, and the mounting hole of the lower pipe clamp 3 in sequence, and finally screw it into the lower fixing threaded hole 6. Use a wrench to tighten all the bolts evenly. As the bolts are tightened, the upper and lower pipe clamps 3 gradually hug the fitting. The flexible sealing lip 17 first contacts the outer wall of the fitting and undergoes elastic deformation, eventually completely sealing the open cooling groove and forming two sealed cooling water chambers. At the same time, the male inlet and outlet water connectors on the pipe clamps and the female connectors on the base are also pressed and sealed, opening up the entire coolant passage. When the external cooling circulation system is activated, the coolant flow path is as follows: External cooling water circulation equipment - lower base 2 quick-connect coupling - lower cooling channel 4 - lower half pipe clamp 3 lower inlet 8 - lower open cooling trench 7 - lower half pipe clamp 3 lower outlet 9 - lower cooling channel 4 - return to external cooling water circulation equipment; External cooling water circulation equipment - upper base 10 quick-connect coupling - upper cooling channel 12 - upper half pipe clamp 11 upper inlet 15 - upper open cooling trench 14 - upper half pipe clamp 11 upper outlet 16 52 - upper cooling channel 12 - return to external cooling water circulation equipment.

[0019] Next, the two flange fittings to be welded are welded to the connecting parts. During this process, the coolant directly and efficiently exchanges heat with the high-temperature pipe wall in the closed chamber, quickly carrying away the welding heat, thus perfectly achieving the triple purpose of preventing deformation, protecting the tooling, and maintaining the surface.

[0020] Any aspects of this utility model not described in detail are well-known technologies to those skilled in the art.

[0021] The preferred embodiments of this utility model have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of this utility model without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of this utility model through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A welding and positioning fixture for a cooling water electric heating device pipeline, characterized in that, The system includes a lower clamping module, an upper clamping module, and locking bolts. The lower clamping module includes a lower base and at least two lower half-pipe clamps detachably mounted on the upper side of the lower base. The lower base has a lower cooling channel inside. The upper surface of the lower base has multiple sets of lower fixing threaded holes. The lower half-pipe clamps are made of plastic, and the inner wall of the lower half-pipe clamps has a lower open cooling groove. The bottom of the lower half-pipe clamps has a lower water inlet and a lower water outlet communicating with the lower cooling channel. The upper clamping module includes an upper base and at least two upper half-pipe clamps detachably mounted on the lower side of the upper base. The upper base has an upper cooling channel inside. The lower surface of the upper base has... The device is equipped with multiple sets of upper fixing holes; the upper half of the pipe clamp is made of plastic, and the inner wall of the upper half of the pipe clamp has an upper open cooling groove. The top of the upper half of the pipe clamp has an upper water inlet and an upper water outlet that are connected to the upper cooling channel; the edges of the lower open cooling groove and the upper open cooling groove are provided with flexible sealing lips; the locking bolt passes through the upper fixing holes, the upper half of the pipe clamp, and the lower half of the pipe clamp in sequence and is screwed into the lower fixing threaded hole; when the locking bolt is tightened, the upper cooling channel is sealed and connected to the upper water inlet and the upper water outlet, the lower cooling channel is sealed and connected to the lower water inlet and the lower water outlet, and the flexible sealing lip is pressed and sealed against the outer wall of the pipe.

2. The welding and positioning fixture for the cooling water electric heating device pipeline according to claim 1, characterized in that, The flexible sealing lip is integrally formed from elastic rubber material and the upper and lower pipe clamps through a secondary injection molding process.

3. The welding positioning fixture for the cooling water electric heating device pipeline according to claim 1 or 2, characterized in that, The lower inlet and lower outlet, and the upper inlet and upper outlet are male connectors; the interfaces between the lower cooling channel and the upper cooling channel and the pipe clamp are provided with matching female connectors with sealing rings.

4. The welding positioning fixture for the cooling water electric heating device pipeline according to claim 1, characterized in that, The plastic is polyetheretherketone or polyetherimide.

5. The welding and positioning fixture for the cooling water electric heating device pipeline according to claim 1, characterized in that, The lower base and the upper base are made of metal sheet.

6. The welding positioning fixture for the cooling water electric heating device pipeline according to claim 1, characterized in that, Both ends of the lower and upper cooling channels are provided with quick-connect interfaces for connecting external pipelines.

Images