Production and processing method for heater assembly pipe

Abstract

The invention belongs to the technical field of heater assembly pipe production, and particularly relates to a heater assembly pipe production processing method which comprises the following steps: determining the exceeding length of a raw material pipe, rotating a threaded rod to enable an indicating needle plate to move on a graduated scale, enabling an adjusting part to move to a reserved cutting part of a pipe fitting, and adjusting the cutting part when the adjusting part moves. When a plurality of raw material pipes are fixed, detected, cut and polished at the same time, the springs enable the central lifting arm to move synchronously, the cutting machines are matched with the movement of the central lifting arm to move to a reserved cutting position, and the electric push plate is started to enable the rack control plate to synchronously drive the multiple cutting machines to conduct surrounding type cutting on the multiple raw material pipes correspondingly. The cutting unit is linked through an electric push rod, a rack and a gear, synchronous radial feeding of a plurality of cutting machines is achieved, multiple purposes of one machine, fine blanking of accurate detection data and controllable remaining material reservation are achieved through adjustable mechanism chucks, trays, cutting depth and indication positioning, and waste of raw materials in the cutting link is reduced to the maximum extent.

Description

Technical Field

[0001] This invention belongs to the field of heater manifold manufacturing technology, specifically a method for manufacturing and processing heater manifolds. Background Technology

[0002] Heater manifolds, also known as "headers" or "connectors," are key piping distribution and collection components in large thermal energy equipment such as boilers, heat exchangers, and nuclear power plant steam generators. Their main function is to evenly distribute the main fluid (such as water, steam, and heat transfer oil) from upstream to numerous parallel heating or evaporating tubes connected to them. They are mainly used in economizers, superheaters, reheaters, water-cooled walls, and other parts of boilers. There is no single "standard shape" for heater manifolds (collectors). Their shape is entirely determined by the design layout and functional requirements of the equipment. Common shapes include straight pipe and bent pipe. The bent pipe is composed of a straight pipe section and an elbow. Common shapes include L-shape, U-shape, and Z-shape. It is used to bypass other structures or adapt to specific spatial layouts, such as the corner of a boiler. This invention is for the production of heater manifolds specifically designed for the U-shape.

[0003] The prior art discloses a Chinese patent with application number CN101943473A, which discloses a fully docked oil tank heater and its production method. It also discloses that the manifold is produced by casting. During casting, pipe joints are cast at the connection between the manifold, the heating pipe and the connecting pipe. Then, the pipe joints of the cast manifold are butt-welded to the heating pipe and the connecting pipe.

[0004] Although the above-mentioned device can perform one of the welding steps during the manufacturing process of the pipe fitting, it still has some drawbacks: The production and processing of heater manifolds involves many steps, resulting in a slow production cycle and low efficiency. The traditional single-piece flow operation mode (fixing, inspecting, and cutting one by one) leads to long equipment waiting times and obvious capacity bottlenecks. Manual marking and positioning, as well as manual cutting, result in large dispersion of key dimensions such as the length of the manifold blank and the perpendicularity of the end face. During the cutting process, the reliance on manual measurement and experience for material cutting leads to poor accuracy, which can easily result in waste due to excessively long cuttings or scrapping of the entire pipe due to cuttings that are too short. Summary of the Invention

[0005] The purpose of this invention is to provide a method for manufacturing and processing heater manifolds to solve the problems mentioned in the background art.

[0006] The objective of this invention can be achieved through the following technical solutions: A method for manufacturing a heater manifold includes the following steps: S1: Pre-production raw material inspection: starting with random sampling of materials and chemical composition. Before the preparation of the heater manifold, the raw materials are sampled and tested. The outer diameter, wall thickness and length of the raw material tube are comprehensively tested using the testing instrument in the testing department to ensure that the material is consistent with the design requirements and that the test data should meet the standard range of the raw materials required for the preparation of the heater manifold. S2: Raw material tube cutting: According to the requirements and specifications of the heater manifold processing, based on the detection part in step S1, the excess length of the raw material tube is determined. The threaded rod is rotated to move the indicator plate on the scale, and the adjusting part is moved to the reserved cutting position of the tube. When the adjusting part moves, the spring causes the central lifting arm to move synchronously. The cutting machine starts to move in coordination with the movement of the central lifting arm and moves to the reserved cutting position. The electric push plate is opened to drive the rack control plate to drive multiple cutting machines to perform a circumferential cut on multiple raw material tubes, and can make marking indications. When the length is determined, the indicator part can controllably reserve the excess material of the raw material tube at the indicated mark. The clamping assembly is used to firmly clamp the raw material tube before cutting, so that it can meet the adjustable cutting operation of tube wall of different thicknesses during cutting. S3: Initial forming: After heating the cut raw material tube in a medium frequency heating furnace, it is placed in a special jig and stretched using a stretching device. After stretching, it is cooled and then the excess pre-reserved parts on the original part are removed. S4: Forging and extrusion processing: Local heating is applied to the key parts that need to be forged at both ends, and the two ends of the pipe are forged and extruded using a press until the two ends of the pipe are processed to be free of cracks and wrinkles and meet the requirements of the drawings. S5: Surface treatment of heater manifold: The grinding machine in the grinding unit is turned on, and multiple grinding machines grind one end of the steel pipe respectively. The position of the steel pipe is turned so that both ends of the steel pipe are ground. The rough parts of the opening edge and cut surface of the steel pipe are finely ground. After grinding, the steel pipe is put into the shot blasting machine to remove residual shot and dust. S6: Pipe end processing: After shot blasting, the steel pipe is clamped on a CNC lathe, and special beveling tools are installed to process the bevel angle and blunt edge size. S7: PT test: Clean the surface of the steel pipe and apply a penetrant, then apply a developer to the steel pipe and observe whether red marks appear on the surface of the steel pipe to determine whether there are processing defects in the heater manifold.

[0007] As a preferred embodiment of the present invention, the detection unit includes a detector that corresponds to each of the multiple raw material tubes after they are placed. The detector is connected and fixed to the outside through a U-shaped frame, and the detector and the raw material tube to be detected are on the same axis.

[0008] As a preferred embodiment of the present invention, the clamping assembly includes a placement seat, on which are provided stabilizing grooves for placing batches of raw material tubes respectively, and each stabilizing groove is provided with limiting chucks on both sides for clamping raw material tubes of different specifications.

[0009] As a preferred embodiment of the present invention, a central adjustment groove is provided in the middle of the placement seat, and the two ends of the central adjustment groove extend through both sides of the placement seat. A lifting frame is slidably arranged in the middle of the central adjustment groove, and a pair of vertical abutment trays corresponding to and communicating with multiple stabilizing grooves are provided on the lifting frame.

[0010] As a preferred technical solution of the present invention, cylinders are fixedly installed on the lower ends of both sides of the lifting frame. The bottom of the cylinders is connected to the placement seat. The lifting and lowering adjustment by vertically abutting the tray can stably support raw material pipes of different specifications in the stabilizing tank.

[0011] As a preferred embodiment of the present invention, the cutting unit includes two symmetrically arranged top guide plates connected to the placement seat. A guide rod is fixedly installed on the top guide plate, and a sliding component is slidably installed on the guide rod. A spring is also sleeved on the top guide plate. A central lifting arm is connected between the two sliding components. A lifting ring frame is provided on the central lifting arm, which is coaxially corresponding to multiple stabilizing grooves.

[0012] As a preferred embodiment of the present invention, a central toothed ring is rotatably installed inside the lifting ring frame, and a horizontally arranged rack control plate is provided in the middle of the central lifting arm. The rack control plate meshes with multiple central toothed rings. A cutting machine is fixedly installed on the inner wall of the central toothed ring, and an electric push plate for displacement control of the rack control plate is fixedly installed on one side of the central lifting arm.

[0013] As a preferred embodiment of the present invention, the indicator includes a scale mounted on a top guide plate on one side, a threaded rod that is threadedly rotatably connected to the top guide plate below the scale, an adjusting member that is horizontally slidable on the side fixing bracket is threadedly mounted on the threaded rod, an indicator pin plate that indicates the data on the scale is provided on one side of the adjusting member, and the upper part of the adjusting member is inverted L-shaped and blocks the central boom.

[0014] As a preferred embodiment of the present invention, the grinding unit includes an abutment plate, and the abutment plate is provided with grinding machines corresponding one-to-one with a plurality of stabilizing grooves.

[0015] The beneficial effects of this invention are: 1. This invention, through the design of clamping components, cutting units, and grinding units, allows for the simultaneous fixing, inspection, cutting, and grinding of multiple raw material pipes. The cutting unit, through the linkage of electric push rod, rack and pinion, enables synchronous radial feeding of multiple cutting machines, quickly adapting to different pipe diameters. The clamping components, with their liftable vertical abutment tray and adjustable limit chuck, combined with cylinder drive, can quickly adapt to and stably support pipes of different specifications. The indicator unit, through threaded rod and adjusting components, enables the visualization and precise digital setting of the cutting position, making operation simple and intuitive.

[0016] 2. This invention takes into account the processing requirements of tubes with different diameters, wall thicknesses, lengths and weights being processed into heat exchanger manifolds through the entire process of detection, clamping, cutting and support design. Through a series of adjustable mechanisms such as chuck, tray, cutting depth and indicator positioning, it achieves multiple uses in one machine. It can accurately detect data for fine-tuned blanking and controllable residual material reservation, which minimizes the waste of raw materials in the cutting process. The stable process also reduces the scrap rate. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a flowchart of the heater manifold processing method of the present invention; Figure 2 This is a side view of the clamping assembly and the detection unit of the present invention; Figure 3 This is a front view of the clamping assembly and the detection unit of the present invention; Figure 4 This is a schematic diagram of the front section structure of the clamping assembly of the present invention; Figure 5 This is a partial structural diagram of the cutting unit and the indicator part of the present invention; Figure 6 This is a schematic diagram of the final shape of the heater manifold tube after stretching according to the present invention.

[0019] The attached figures are labeled as follows: 1. Placement seat; 10. Stabilizing groove; 11. Limiting chuck; 12. Center adjustment groove; 13. Cylinder; 14. Lifting frame; 15. Vertical abutment tray; 2. Side fixing frame; 21. Top guide plate; 22. Guide rod; 23. Sliding component; 24. Center boom; 25. Lifting ring frame; 26. Center toothed ring; 27. Cutting machine; 28. Rack and pinion control plate; 29. ​​Electric push plate; 3. Threaded rod; 31. Adjusting component; 32. Scale; 33. Indicator pin plate; 4. Abutment plate; 41. Grinding machine; 5. C-shaped frame; 51. Detector. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Please see Figure 1-6 As shown, the present invention is a method for manufacturing and processing a heater manifold, comprising the following steps: S1: Pre-production raw material inspection: starting with random sampling of materials and chemical composition. Before the preparation of the heater manifold, the raw materials are sampled and tested. The outer diameter, wall thickness and length of the raw material tube are fully tested using the test instrument 51 in the testing department to ensure that the material is consistent with the design requirements and that the test data should meet the standard range of the raw materials required for the preparation of the heater manifold. S2: Raw material tube cutting: According to the requirements of the heater manifold processing, the excess length of the raw material tube is determined according to the detection unit in step S1. The threaded rod 3 is rotated to move the indicator pin plate 33 on the scale 32, so that the adjusting part 31 is moved to the reserved cutting position of the tube. When the adjusting part 31 moves, the spring causes the central lifting arm 24 to move synchronously. The cutting machine 27 starts to move in coordination with the movement of the central lifting arm 24 and moves to the reserved cutting position. The electric push plate 29 is opened to drive the rack control plate 28 to drive multiple cutting machines 27 to perform a circular cut on multiple raw material tubes, and can make marking indications. When the length is determined, the indicator unit can controllably reserve the excess material of the raw material tube at the indicated mark. The clamping assembly is used to firmly clamp the raw material tube before cutting, so that it can meet the adjustable cutting operation of tube wall of different thicknesses during cutting. S3: Initial forming: After heating the cut raw material tube in a medium frequency heating furnace, it is placed in a special jig and stretched using a stretching device. After stretching, it is cooled and then the excess pre-reserved parts on the original part are removed. S4: Forging and extrusion processing: Local heating is applied to the key parts that need to be forged at both ends, and the two ends of the pipe are forged and extruded using a press until the two ends of the pipe are processed to be free of cracks and wrinkles and meet the requirements of the drawings. S5: Surface treatment of heater collection tube: The grinding machine 41 in the grinding unit is turned on, and multiple grinding machines 41 grind one end of the steel pipe respectively. The position of the steel pipe is turned so that both ends of the steel pipe are ground. The rough parts of the opening edge and cut surface of the steel pipe are finely ground. After grinding, the steel pipe is put into the shot blasting machine to remove residual shot and dust. S6: Pipe end processing: After shot blasting, the steel pipe is clamped on a CNC lathe, and special beveling tools are installed to process the bevel angle and blunt edge size. S7: PT test: Clean the surface of the steel pipe and apply a penetrant, then apply a developer to the steel pipe and observe whether red marks appear on the surface of the steel pipe to determine whether there are processing defects in the heater manifold.

[0022] Step S1 involves random sampling of raw materials for their material composition, chemical composition, and geometric dimensions (outer diameter, wall thickness, and length) to ensure that the raw materials meet the standards and eliminate product defects caused by unqualified raw materials at the source. Step S7 introduces PT (penetration testing), which can effectively detect small cracks, pores, and other processing defects on the surface of steel pipes, ensuring the surface integrity of the final product. The test data from S1 provides a precise basis for subsequent cutting and processing, enabling production to shift from "experience-driven" to "data-driven". In S2, the precise control and marking of the cutting length of the raw material tube is achieved through the coordination of the detection unit data, the indicator unit (scale 32, indicator pin plate 33) and the clamping assembly, and reasonable allowance is reserved to reduce material waste and provide accurate blanks for subsequent forming. S3 uses special jigs and stretching equipment. S4 local heating and forging of key parts ensures the consistency and dimensional stability of the forming of complex-shaped aggregate tubes and reduces human error. S6 uses special beveling tools on a CNC lathe to process the bevel, ensuring high precision and consistency of the bevel angle and blunt edge size, and providing a perfect interface for subsequent welding processes. The design of the clamping assembly (placement seat 1, multiple stabilizing grooves 10) and the cutting unit (multiple lifting rings 25 and cutting machine 27) allows for the simultaneous fixing and circumferential cutting of multiple raw material pipes, significantly improving material feeding efficiency. The linkage design of the electric push plate 29, rack control plate 28, and central toothed ring 26 in the cutting unit enables the synchronous radial feeding of multiple cutting machines 27, adapting to different pipe diameters and allowing for quick adjustment. The lifting frame 14 and the vertical abutment tray 15 are raised and lowered by the cylinder 13, which can quickly adapt to and stably support pipes of different specifications. S5 combines grinding and shot blasting. The grinding unit (multiple grinding machines 41) can deburr the cut surfaces of multiple steel pipes in batches, while the shot blasting machine efficiently completes surface cleaning and strengthening. The limiting chuck 11 and the liftable vertical abutment tray 15 can adapt to raw material tubes of different diameters and weights, achieving stable clamping, preventing rolling or displacement during processing, and ensuring safety. The indicator part (scale 32, indicator pin plate 33) provides a clear visual reference, making cutting positioning intuitive and accurate, reducing the difficulty of operation and error rate. The medium-frequency heating of S3 and the local heating forging of S4 are beneficial to the plastic deformation of the material, reducing internal stress concentration and cold work hardening. The subsequent shot blasting treatment (S5) can also eliminate surface stress and improve fatigue strength. The bevel of S6 ensures the penetration and weld quality during subsequent welding, fundamentally improving the structural strength and airtightness of the connection between the manifold and other components. The testing department includes a testing instrument 51 that corresponds to each of the multiple raw material tubes. The testing instrument 51 is connected and fixed to the outside through a U-shaped frame 5, and the testing instrument 51 and the raw material tube to be tested are on the same axis.

[0023] The testing instrument 51 can be a laser scanner, an ultrasonic thickness gauge, or a spectrometer, with no specific limitations. It can perform non-contact scanning of a stationary or slowly rotating raw material pipe from multiple angles, quickly generate three-dimensional point cloud data of the pipe, accurately calculate its outer diameter and total length, calculate the wall thickness by measuring the time it takes for ultrasonic waves to propagate within the pipe wall, and perform laser-induced breakdown spectroscopy (LIBS) analysis on the surface of the raw material pipe to quickly determine the material grade and main alloy composition.

[0024] The clamping assembly includes a placement seat 1, which has stabilizing grooves 10 for placing batches of raw material tubes. Each stabilizing groove 10 has a limiting chuck 11 on both sides for clamping raw material tubes of different specifications.

[0025] Before the heater manifold is processed and formed, it is referred to as raw material pipe, steel pipe, and pipe fitting. After the raw material pipe is placed in the stabilizing groove 10, the limiting chucks 11 on both sides of the stabilizing groove 10 are opened by electric sliders to drive them to move closer to each other until the raw material pipe in the stabilizing groove 10 is clamped and fixed. Through the movable displacement between the two stabilizing grooves 10, the fixing of raw material pipes of different diameter specifications before processing into heater manifold is satisfied, so as to meet the stable operation of pipe fittings in each processing step. A central adjustment groove 12 is provided in the middle of the placement seat 1. The two ends of the central adjustment groove 12 pass through the two sides of the placement seat 1. A lifting frame 14 is slidably arranged in the middle of the central adjustment groove 12. A pair of vertical abutment trays 15 corresponding to and connected with multiple stabilizing grooves 10 are provided on the lifting frame 14.

[0026] Cylinders 13 are fixedly installed on the lower ends of both sides of the lifting frame 14. The bottom of the cylinder 13 is connected to the placement seat 1. By vertically abutting against the tray 15 for lifting and adjustment, it can stably support raw material pipes of different specifications in the stabilizing tank 10.

[0027] When raw material pipes of different specifications are placed in the stabilizing tank 10, in order to ensure that the raw material pipes and the lifting ring frame 25 are on the same axis, the purpose is twofold: firstly, to facilitate the accurate detection of the raw material pipes by the detector 51, and secondly, to ensure that the cutting machine 27 can fully perform a circumferential cutting operation on the pipe wall of the raw material pipes in the lifting ring frame 25 when it rotates. Therefore, it is necessary to activate the cylinder 13 to perform a telescopic operation to drive the lifting frame 14 to rise and fall in the central adjustment tank 12. Finally, when the lifting frame 14 rises and falls, it simultaneously drives multiple vertical abutment trays 15 to rise and fall. That is, when raw material pipes of different diameters are placed in the stabilizing tank 10, the position adjustment of the vertical abutment trays 15 can also stably support and place the raw material pipes.

[0028] The cutting unit includes two symmetrically arranged top guide plates 21 connected to the placement seat 1. A guide rod 22 is fixedly installed on the top guide plate 21. A sliding component 23 is slidably installed on the guide rod 22. A spring is also sleeved on the top guide plate 21. A central lifting arm 24 is connected between the two sliding components 23. A lifting ring frame 25 is provided on the central lifting arm 24, which is coaxially corresponding to multiple stabilizing grooves 10.

[0029] A central gear ring 26 is rotatably installed inside the lifting ring frame 25. A horizontally arranged rack control plate 28 is provided in the middle of the central lifting arm 24. The rack control plate 28 meshes with multiple central gear rings 26. A cutting machine 27 is fixedly installed on the inner wall of the central gear ring 26. An electric push plate 29 for displacement control of the rack control plate 28 is fixedly installed on one side of the central lifting arm 24.

[0030] After the indicator marks the reserved position on the raw material tube, the sliding member 23 can be squeezed under the action of the spring, so that the sliding members 23 on both sides drive the central lifting arm 24 to move towards the placement seat 1 until it is blocked by the upper part of the adjusting member 31 in the indicator. When the outside of the raw material tube is cut in a circular manner, since the raw material tube is placed stably in the stabilizing groove 10, the cutting machine 27 is turned on first to start the operation and cut the upper part of the raw material tube. Then the electric push plate 29 is turned on to push forward. When the electric push plate 29 pushes forward, it drives the rack control plate 28 to slide in the central lifting arm 24. When the rack control plate 28 moves, it drives multiple central gear rings 26 to rotate. When the central gear rings 26 rotate, they drive the cutting machine 27 on the inner wall of the central gear rings 26 to perform a circular cut along the axis of the corresponding raw material tube.

[0031] The indicator includes a scale 32 mounted on a top guide plate 21 on one side. Below the scale 32 is a threaded rod 3 that is threadedly rotatably connected to the top guide plate 21. An adjusting member 31 that slides horizontally on the side fixing bracket 2 is threadedly mounted on the threaded rod 3. An indicator pin plate 33 that indicates the data on the scale 32 is provided on one side of the adjusting member 31. The upper part of the adjusting member 31 is inverted L-shaped and blocks the central boom 24.

[0032] When the indicator is marked with different lengths reserved in the raw material tube, the threaded rod 3 is manually rotated. When the threaded rod 3 rotates, it drives the adjusting part 31 to selectively hover along the value on the scale 32. When the indicator needle plate 33 is hovered, it indicates the distance positioned on the raw material tube according to the data on the scale 32. As the adjusting part 31 moves toward the placement seat 1, the central lifting arm 24 also moves with it under the compression of the spring, thereby moving the cutting machine 27 on the lifting ring frame 25 to the position where the raw material tube needs to be cut, so as to cut off the excess length of the raw material tube. The indicator section can meet the requirements of precise material feeding and controllable residual material reservation, reducing the waste of raw materials in the cutting process. Qualified raw materials and stable processes also reduce the scrap rate, thereby improving the overall material utilization rate. The grinding unit includes an abutment plate 4, on which a grinding machine 41 is provided, corresponding one-to-one with a plurality of stabilizing grooves 10.

[0033] The above description is merely an example and illustration of the concept of the present invention. Those skilled in the art can make various modifications or additions to the specific embodiments described or use similar methods to replace them, as long as they do not deviate from the concept of the invention or exceed the scope defined in the claims, they should all fall within the protection scope of the present invention.

Claims

1. A method for manufacturing and processing a heater manifold, characterized in that, Includes the following steps: S1: Pre-production raw material inspection: starting with random sampling of materials and chemical composition. Before the preparation of the heater manifold, the raw materials are sampled and tested. The outer diameter, wall thickness and length of the raw material tube are comprehensively tested using the testing instrument in the testing department to ensure that the material is consistent with the design requirements and that the test data should meet the standard range of the raw materials required for the preparation of the heater manifold. S2: Raw material tube cutting: According to the requirements and specifications of the heater manifold processing, based on the detection part in step S1, the excess length of the raw material tube is determined. The threaded rod is rotated to move the indicator plate on the scale, and the adjusting part is moved to the reserved cutting position of the tube. When the adjusting part moves, the spring causes the central lifting arm to move synchronously. The cutting machine starts to move in coordination with the movement of the central lifting arm and moves to the reserved cutting position. The electric push plate is opened to drive the rack control plate to drive multiple cutting machines to perform a circumferential cut on multiple raw material tubes, and can make marking indications. When the length is determined, the indicator part can controllably reserve the excess material of the raw material tube at the indicated mark. The clamping assembly is used to firmly clamp the raw material tube before cutting, so that it can meet the adjustable cutting operation of tube wall of different thicknesses during cutting. S3: Initial forming: After heating the cut raw material tube in a medium frequency heating furnace, it is placed in a special jig and stretched using a stretching device. After stretching, it is cooled and then the excess pre-reserved parts on the original part are removed. S4: Forging and extrusion processing: Local heating is applied to the key parts that need to be forged at both ends, and the two ends of the pipe are forged and extruded using a press until the two ends of the pipe are processed to be free of cracks and wrinkles and meet the requirements of the drawings. S5: Surface treatment of heater manifold: The grinding machine in the grinding unit is turned on, and multiple grinding machines grind one end of the steel pipe respectively. The position of the steel pipe is turned so that both ends of the steel pipe are ground. The rough parts of the opening edge and cut surface of the steel pipe are finely ground. After grinding, the steel pipe is put into the shot blasting machine to remove residual shot and dust. S6: Pipe end processing: After shot blasting, the steel pipe is clamped on a CNC lathe, and special beveling tools are installed to process the bevel angle and blunt edge size. S7: PT test: Clean the surface of the steel pipe and apply a penetrant, then apply a developer to the steel pipe and observe whether red marks appear on the surface of the steel pipe to determine whether there are processing defects in the heater manifold.

2. The method for manufacturing a heater manifold according to claim 1, characterized in that, The detection unit includes a detector that corresponds to each of the multiple raw material tubes. The detector is connected and fixed to the outside through a U-shaped frame, and the detector and the raw material tube to be detected are on the same axis.

3. The method for manufacturing a heater manifold according to claim 1, characterized in that, The clamping assembly includes a placement seat with stabilizing grooves for placing batches of raw material tubes. Each stabilizing groove has a limiting chuck on both sides for clamping raw material tubes of different specifications.

4. The method for manufacturing a heater manifold according to claim 3, characterized in that, The placement seat has a central adjustment groove in the middle, and the two ends of the central adjustment groove pass through the two sides of the placement seat. A lifting frame is slidably arranged in the middle of the central adjustment groove, and the lifting frame is provided with a pair of vertical abutment trays that correspond to and are connected to the multiple stabilizing grooves.

5. A method for manufacturing a heater manifold according to claim 4, characterized in that, Cylinders are fixedly installed on the lower ends of both sides of the lifting frame. The bottom of the cylinders is connected to the placement seat. The lifting and lowering adjustment by vertically abutting the tray can stably support raw material pipes of different specifications in the stabilizing tank.

6. The method for manufacturing a heater manifold according to claim 1, characterized in that, The cutting unit includes two symmetrically arranged top guide plates connected to the placement seat. A guide rod is fixedly installed on the top guide plate, and a sliding component is slidably installed on the guide rod. A spring is also sleeved on the top guide plate. A central lifting arm is connected between the two sliding components. A lifting ring frame is provided on the central lifting arm, which is coaxial with multiple stabilizing grooves.

7. A method for manufacturing a heater manifold according to claim 1, characterized in that, A central gear ring is rotatably installed inside the lifting ring frame. A horizontally arranged rack control plate is provided in the middle of the central lifting arm. The rack control plate meshes with multiple central gear rings. A cutting machine is fixedly installed on the inner wall of the central gear ring. An electric push plate for displacement control of the rack control plate is fixedly installed on one side of the central lifting arm.

8. A method for manufacturing a heater manifold according to claim 1, characterized in that, The indicator includes a scale mounted on a top guide plate on one side. Below the scale is a threaded rod that is threadedly rotatably connected to the top guide plate. An adjusting component that slides horizontally on a side fixed frame is threadedly mounted on the threaded rod. An indicator pin plate that indicates the data on the scale is provided on one side of the adjusting component. The upper part of the adjusting component is inverted L-shaped and blocks the central boom.

9. A method for manufacturing a heater manifold according to claim 1, characterized in that, The grinding unit includes an abutment plate, on which a grinding machine is provided, each corresponding to a plurality of stabilizing grooves.

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