Weld joint rapid cooling device

Abstract

The utility model discloses a rapid cooling device for a welding seam, and mainly relates to the technical field of alloy pipe welding. Comprising a first blocking plate and a second blocking plate which are oppositely arranged, a water inlet and a water outlet are fixed to the second blocking plate in a penetrating mode, conical sealing rings which reversely and symmetrically extend are fixed to the outer side of the first blocking plate and the outer side of the second blocking plate correspondingly, and each conical sealing ring comprises a second annular part, a conical reducing part and a first annular part which are sequentially connected; the second annular part is fixedly connected with the first blocking plate or the second blocking plate, the outer diameter of the conical reducing part is decreased from the second annular part to the first annular part, the conical reducing part is sleeved with a sealing ring, and the first annular part is provided with a pressing ring assembly with the distance adjustable from the first annular part along the axis. The end, close to the conical reducing part, of the pressing ring assembly is provided with an annular pressing face, and the pressing face makes contact with the sealing ring. The device has the advantages of protecting and cooling a welding seam during welding of an alloy pipe, effectively improving the quality of the welding seam, and being simple in structure, efficient, simple and convenient.

Description

Technical Field

[0001] This utility model relates to the field of alloy pipe welding technology, specifically a rapid cooling device for weld seams. Background Technology

[0002] In the welding process of 90Cu10Ni alloy pipes, there are problems with unstable alloy welding quality and low weld pass rate. One of the main reasons is that under overheating conditions, the surface discoloration occurs, affecting the alloy content of the material and reducing its corrosion resistance in subsequent use.

[0003] Current solutions typically involve covering the weld with a damp cloth to cool it down and improve weld quality. However, this method is not very effective at cooling the weld, and covering the perimeter can be cumbersome, especially as the number of weld layers increases, significantly limiting the cooling capacity of the damp cloth. Utility Model Content

[0004] The purpose of this invention is to provide a rapid cooling device for welds, which is designed to protect and cool the welds during alloy pipe welding, effectively improving weld quality, and is simple, efficient and convenient in structure.

[0005] To achieve the above objectives, this utility model employs the following technical solution:

[0006] A rapid cooling device for weld seams inside pipes includes a first blocking plate and a second blocking plate arranged opposite to each other. An inlet and an outlet are fixedly connected through the second blocking plate. Conical sealing rings extending symmetrically in opposite directions are fixed to the outer sides of the first and second blocking plates, respectively. Each conical sealing ring includes a second annular portion, a conical variable diameter portion, and a first annular portion connected in sequence. The second annular portion is fixedly connected to the first or second blocking plate. The outer diameter of the conical variable diameter portion decreases from the second annular portion to the first annular portion. A sealing ring is fitted onto the conical variable diameter portion. A clamping ring assembly with an adjustable distance from the first annular portion along its axis is provided. The clamping ring assembly has an annular pressing surface at one end near the conical variable diameter portion, and the pressing surface contacts the sealing ring.

[0007] A water nozzle is connected to the inner end of the water inlet near the first blocking plate. The water nozzle is a pipe fitting with its opening close to the pipe wall.

[0008] The inlet is connected to a cold water source and a nitrogen gas source, which are alternately switched on and off based on valve control.

[0009] The compression ring assembly includes an inner compression ring and an outer compression ring, which are annular and interlocked. The inner compression ring and the outer compression ring are fixed together at the end away from the tapered sealing ring. The inner compression ring is movably inserted into the inner ring of the first annular portion. The outer compression ring is disposed outside the first annular portion. The compression surface is disposed at the end of the compression ring near the tapered diameter portion.

[0010] The inner ring of the inner sleeve of the clamping ring is welded and fixed with a ring plate. Multiple internal threaded short sections are provided on the end face of the blocking plate near the inner sleeve of the clamping ring. A circular hole is provided on the ring plate corresponding to the internal threaded short section. A screw that is threadedly connected to the internal threaded short section is fitted in the circular hole.

[0011] The inner sleeve of the compression ring is a cylindrical annular part. The outer diameter of the inner sleeve of the compression ring is adapted to the inner diameter of the conical sealing ring. The end of the inner sleeve of the compression ring away from the conical sealing ring is provided with an outwardly extending annular protrusion. A stepped groove is provided at one end of the inner ring of the outer sleeve of the compression ring. The protrusion is placed in the stepped groove and welded to the groove opening.

[0012] The second annular portion has an annular groove on the annular end face away from the first annular portion. The annular groove is coaxial with the conical sealing ring. The diameter of the first or second blocking plate is adapted to the inner diameter of the annular groove. The first or second blocking plate is disposed in the annular groove, and the periphery of the first or second blocking plate is sealed and fixed to the groove opening of the annular groove by welding.

[0013] The sealing ring is a silicone O-ring, and the sealing ring has a circular cross-section with a diameter of 10mm.

[0014] The first blocking plate has a threaded seat fixed in the center extending toward the second blocking plate, and the second blocking plate has a long screw fixed in the center extending toward the first blocking plate. The long screw is threadedly engaged with the threaded seat.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] In use, the first and second blocking plates are placed inside the alloy pipe, with the first and second blocking plates positioned on opposite sides of the welding position. By pressing the first / second blocking plates closer together with the clamping ring assembly, the sealing ring is pushed to the larger diameter area on the conical surface, thus achieving a tight seal with the inner wall of the alloy pipe. This creates a closed space within the alloy pipe, where the weld seam is cooled and flushed through the inlet and outlet. This process is highly efficient and effective, producing a high-quality, golden-yellow weld seam and improving the quality of pipe fitting processing. Attached Figure Description

[0017] Figure 1 This is a structural diagram of the utility model in use.

[0018] Figure 2 This is a utility model Figure 1 Enlarged view of part I.

[0019] Figure 3 This is a schematic diagram showing the components of this utility model disassembled.

[0020] The labels shown in the attached diagram:

[0021] 1. First blocking plate; 2. Second blocking plate; 3. Outer sleeve of clamping ring; 4. Pressing surface; 5. Inner sleeve of clamping ring; 6. Sealing ring; 7. First annular part; 8. Tapered reducing part; 9. Second annular part; 10. Annular flange; 11. Ring plate; 12. Internal threaded short section; 13. Screw; 14. Water inlet; 15. Water outlet; 16. Water nozzle; 17. Threaded seat; 18. Long screw. Detailed Implementation

[0022] The present invention will be further illustrated below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the present invention, and these equivalent forms also fall within the scope defined in this application.

[0023] Example:

[0024] This example is designed based on the welding of 90Cu10Ni alloy pipes, specifically for the protection and cooling of the weld seam during the welding process. Its main structure includes:

[0025] The first and second blocking mechanisms are arranged symmetrically in opposite directions. The basic structures of the first and second blocking mechanisms are essentially the same, both including:

[0026] Conical sealing ring, plug plate, outer sleeve of clamping ring 3, inner sleeve of clamping ring 5, sealing ring 6;

[0027] Conical sealing ring: The outer diameter (250) of the conical sealing ring is smaller than the inner diameter of the alloy tube workpiece, facilitating easy insertion into the alloy tube. The conical sealing ring includes a first annular portion 7, a conical variable diameter portion 8, and a second annular portion 9 connected in sequence. The first annular portion 7, the conical variable diameter portion 8, and the second annular portion 9 are all annular components with coaxial and equal inner diameters. The outer diameter of the first annular portion 7 is smaller than that of the second annular portion 9. The outer circumferential surface of the conical variable diameter portion 8 is conical, with the smaller outer diameter end of the conical variable diameter portion 8 connected to the first annular portion 7 with equal diameter, and the larger outer diameter end of the conical variable diameter portion 8 connected to the second annular portion 9 with equal diameter. Thus, the first annular portion 7 and the second annular portion 9 respectively achieve connection and cooperation with other components, and the expansion size of the sealing ring 6 is adjusted by the conical variable diameter portion 8.

[0028] A blocking plate is provided on the annular end face of the second annular portion 9 away from the first annular portion 7, with an annular groove coaxial with the conical sealing ring. The diameter of the blocking plate is adapted to the inner diameter of the annular groove. The blocking plate is a circular plate with a thickness of 4mm. The periphery of the blocking plate is sealed and fixed to the groove opening of the annular groove by welding. A closed circular structure is obtained based on the blocking plate and the conical sealing ring.

[0029] Inner sleeve 5 of the clamping ring: As one of the clamping ring components, the inner sleeve 5 of the clamping ring is a cylindrical annular part. The outer diameter of the inner sleeve 5 of the clamping ring is adapted to the inner diameter of the conical sealing ring. The inner sleeve 5 of the clamping ring is movably inserted into the inner ring of the conical sealing ring to guide the movement adjustment. An outwardly extending annular flange 10 is provided at the end of the inner sleeve 5 away from the conical sealing ring.

[0030] Compression ring outer sleeve 3: As one of the compression ring components, the inner side of one end of the compression ring outer sleeve 3 is fixedly welded to the outer side of the raised edge. To improve sealing and fixation, a stepped groove is provided at one end of the inner ring of the compression ring outer sleeve 3. The raised edge is placed in the stepped groove before welding. The outer diameter of the compression ring outer sleeve 3 corresponds to the outer diameter of the second annular part 9, and both can smoothly enter the alloy tube. The end face of the compression ring outer sleeve 3 near the blocking plate is the pressure surface 4. The pressure surface 4 is used to contact the sealing ring 6 and push the sealing ring 6 to move.

[0031] The above components are connected and their spacing is adjusted via the following structure:

[0032] Multiple internally threaded short sections 12 are provided on the end face of the blocking plate near the inner sleeve 5 of the clamping ring. The internally threaded short sections 12 have internally threaded grooves and are distributed circumferentially on the edge of the blocking plate. The inner ring of the inner sleeve 5 of the clamping ring is welded and fixed with a ring plate 11. The ring plate 11 is annular and has eight 10mm diameter circular holes arranged in a circular array at its edge. The position of the circular holes corresponds to the position of the internally threaded short sections 12. An M8×35 screw 13 is fitted through the circular hole and is threaded to the internally threaded short section 12. By adjusting the mating depth between the M8×35 screw 13 and the internally threaded short section 12, the relative distance between the inner sleeve 5 and the outer sleeve 3 of the clamping ring and the conical sealing ring can be adjusted.

[0033] Sealing ring 6: The sealing ring 6 is an "O"-shaped silicone sealing ring 6. The sealing ring 6 has a circular cross-section and a silicone O-ring with a diameter of 10mm. The inner diameter of the sealing ring 6 is larger than or corresponds to the outer diameter of the first annular portion 7. The sealing ring 6 is sleeved on the outside of the conical sealing ring, and its initial position is close to the first annular portion 7. The compression ring outer sleeve 3 (the compression surface 4—the annular end face close to the conical sealing ring) is in contact with the sealing ring 6. By adjusting the relative distance between the compression ring outer sleeve 3 and the conical sealing ring, the relative position of the sealing ring 6 on the conical diameter-changing portion 8 can be changed, thereby changing the degree of expansion of the outer circumference of the sealing ring 6, achieving a tight fit with the inner wall of the pipe, and achieving a sealing effect on the inner diameter of the pipe.

[0034] In alloy pipe processing, due to insufficient roundness and rough inner surface of the pipe, it cannot be directly sealed. In the above structure, the clamping ring assembly and the plug plate are integrated by M8×35 screws 13. A conical sealing ring with a diameter slightly smaller than the inner wall of the pipe and the clamping ring assembly are inserted into the pipe. By adjusting the position of the sealing ring 6 on the conical surface, the expansion effect of the conical sealing ring on the sealing ring 6 is achieved, thus sealing the sealing ring 6 with the inner wall of the pipe.

[0035] The first sealing mechanism and the second sealing mechanism are identical in the above structure. When in use, the sealing plates are arranged opposite each other and placed side by side inside the pipe. Thus, the first sealing mechanism and the second sealing mechanism respectively (on both sides of the weld) cooperate with the inner wall of the pipe to obtain a closed weld cooling space.

[0036] For ease of description, the blocking plate of the first blocking mechanism is defined as the first blocking plate 1, and the blocking plate of the second blocking mechanism is defined as the second blocking plate 2. The second blocking plate 2 is provided with a through-fixed water inlet 14 and a water outlet 15. The water outlet 15 is located below the water inlet 14. The outer end of the water inlet 14 (the end near the ring plate 11) is used to connect a cold water source and a nitrogen gas source. When welding is in progress, nitrogen gas is introduced through the water inlet 14 to protect the weld. When welding is completed, the water inlet 14 is connected to a cold water source to cool the weld.

[0037] The water inlet 14 is connected to an inwardly extending water nozzle 16 near the inner end of the first sealing plate. The water nozzle 16 is a pipe structure, which can be a rigid bend or a flexible and shape-fixable pipe such as a snake pipe. The end of the water nozzle 16 is set close to the pipe wall and corresponds to the weld seam, thereby achieving the effect of cold water rinsing and cooling.

[0038] An M8 threaded seat 17 is welded and fixed to the center of the first blocking plate 1. An M8 long screw 18 is welded to the center of the second blocking plate 2, the length of which is the length of the enclosed cooling water space. In this example, the length is 120 mm and is adjustable. The long screw 18 allows for setting the distance between the first blocking plate 1 and the second blocking plate 2 from outside the pipe. This is not limited to this example; other methods can be used to adjust the distance, or the two blocking mechanisms can be used independently.

[0039] In practical use, the operation method in this example is as follows:

[0040] Step 1: Place the first and second sealing mechanisms inside the alloy pipe to be welded, with the first sealing plate 1 and the second sealing plate 2 facing each other. Adjust the clamping ring assembly to seal the sealing ring 6 with the inner wall of the pipe, forming a closed space between the first sealing plate 1 and the second sealing plate 2, obtaining a closed cooling area around the weld, and aligning the water nozzle 16 with the center of the weld that needs cooling.

[0041] Step 2: When using, first seal the inlet 14. Then, pass argon gas through the outlet 15 to perform a bottom sealing weld to ensure no subsequent leakage.

[0042] Step 3: Continue welding. Cold water is introduced through inlet 14, and the water, having absorbed the welding heat, exits from outlet 15. An external water tank creates a self-circulating cooling water system. This lowers the weld temperature and ensures weld quality. (The back weld has already been completed; the weld metal can directly contact the cooling water.)

[0043] In this example, the pipe specification is 267×5.5. Other pipe specifications, such as 323.9×7 and 159×3.5, can also be implemented by referring to this method.

[0044] When this tooling was used in the project, the first-pass yield rate of welding reached 100%, and the weld surface was golden yellow, with excellent results.

Claims

1. A rapid cooling device for weld seams, characterized in that, The device includes a first and a second blocking plate arranged opposite to each other. An inlet and an outlet are fixedly connected through the second blocking plate. Conical sealing rings extending symmetrically in opposite directions are fixed to the outer sides of the first and second blocking plates, respectively. The conical sealing rings include a second annular portion, a conical variable diameter portion, and a first annular portion connected in sequence. The second annular portion is fixedly connected to the first or second blocking plate. The outer diameter of the conical variable diameter portion decreases from the second annular portion to the first annular portion. A sealing ring is fitted onto the conical variable diameter portion. A clamping ring assembly with an adjustable distance from the first annular portion along its axis is provided. The clamping ring assembly has an annular pressing surface at one end near the conical variable diameter portion, and the pressing surface contacts the sealing ring.

2. The rapid cooling device for welds according to claim 1, characterized in that, A water nozzle is connected to the inner end of the water inlet near the first blocking plate. The water nozzle is a pipe fitting with its opening close to the pipe wall.

3. The rapid cooling device for welds according to claim 1, characterized in that, The inlet is connected to a cold water source and a nitrogen gas source, which are alternately switched on and off based on valve control.

4. The rapid cooling device for welds according to claim 1, characterized in that, The compression ring assembly includes an inner compression ring and an outer compression ring, which are annular and interlocked. The inner compression ring and the outer compression ring are fixed together at the end away from the tapered sealing ring. The inner compression ring is movably inserted into the inner ring of the first annular portion. The outer compression ring is disposed outside the first annular portion. The compression surface is disposed at the end of the compression ring near the tapered diameter portion.

5. The rapid cooling device for welds according to claim 4, characterized in that, The inner ring of the inner sleeve of the clamping ring is welded and fixed with a ring plate. Multiple internal threaded short sections are provided on the end face of the blocking plate near the inner sleeve of the clamping ring. A circular hole is provided on the ring plate corresponding to the internal threaded short section. A screw that is threadedly connected to the internal threaded short section is fitted in the circular hole.

6. The rapid cooling device for welds according to claim 5, characterized in that, The inner sleeve of the compression ring is a cylindrical annular part. The outer diameter of the inner sleeve of the compression ring is adapted to the inner diameter of the conical sealing ring. The end of the inner sleeve of the compression ring away from the conical sealing ring is provided with an outwardly extending annular protrusion. A stepped groove is provided at one end of the inner ring of the outer sleeve of the compression ring. The protrusion is placed in the stepped groove and welded to the groove opening.

7. The rapid cooling device for welds according to claim 1, characterized in that, The second annular portion has an annular groove on the annular end face away from the first annular portion. The annular groove is coaxial with the conical sealing ring. The diameter of the first or second blocking plate is adapted to the inner diameter of the annular groove. The first or second blocking plate is disposed in the annular groove, and the periphery of the first or second blocking plate is sealed and fixed to the groove opening of the annular groove by welding.

8. The rapid cooling device for welds according to claim 1, characterized in that, The sealing ring is a silicone O-ring, and the sealing ring has a circular cross-section with a diameter of 10mm.

9. The rapid cooling device for welds according to claim 1, characterized in that, The first blocking plate has a threaded seat fixed in the center extending toward the second blocking plate, and the second blocking plate has a long screw fixed in the center extending toward the first blocking plate. The long screw is threadedly engaged with the threaded seat.

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