Preheating device for weld joint of offshore wind power steel pipe pile

By using a preheating device in offshore wind power construction, which uses a mixture of propane and compressed air to form a flame and counteract the effects of wind, the problem of uneven preheating of steel pipe pile welds was solved, achieving more efficient temperature control and improved welding quality.

CN224108190UActive Publication Date: 2026-04-10XIAMEN BRANCH OF CCCC THIRD HARBOR ENG
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
XIAMEN BRANCH OF CCCC THIRD HARBOR ENG
Filing Date
2025-05-12
Publication Date
2026-04-10

AI Technical Summary

Technical Problem

During offshore wind power construction, the propane flame is easily affected by wind disturbance during the preheating process of steel pipe pile welds, resulting in uneven temperature in the heating area and affecting the welding quality.

Method used

A preheating device is used to generate a flame by mixing propane and compressed air through a ventilation cavity and connecting cylinder formed between the inner and outer tubes of the nozzle. The flame is counteracted by an air curtain barrier, and precise preheating is achieved by combining an air volume regulating valve and a fixed support.

Benefits of technology

It effectively prevents flame dispersion, improves the preheating effect of steel pipe pile welds, enhances temperature uniformity, and ensures welding quality.

✦ Generated by Eureka AI based on patent content.

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    Figure CN224108190U_ABST
Patent Text Reader

Abstract

The utility model relates to the technical field of offshore wind power foundation construction, and provides a preheating device for a weld joint of an offshore wind power steel pipe pile. The combustion nozzle comprises a nozzle inner pipe and a nozzle outer pipe; the nozzle inner pipe comprises a mounting ring and a communicating cylinder; the mounting ring is arranged at the top of the nozzle outer pipe, the communicating cylinder is arranged on the mounting ring, the communicating cylinder is located in the nozzle outer pipe, a ventilation cavity is formed between the communicating cylinder and the nozzle outer pipe, and a plurality of ventilation holes communicated with the ventilation cavity are formed in the peripheral side of the communicating cylinder; a first air inlet nozzle is arranged on the peripheral side of the spray head outer pipe and communicated with the ventilation cavity, and a second air inlet nozzle is arranged at the bottom of the spray head outer pipe and communicated with the communication cylinder. Therefore, flame drifting can be avoided as much as possible, and the preheating effect of the welding seam of the steel pipe pile is improved.
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Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of offshore wind power foundation construction, and in particular to a preheating device for offshore wind power steel pipe pile welds. BACKGROUND

[0002] At present, in the foundation construction of offshore wind power single piles, the steel pipe pile welds need to be preheated to 80-120 DEG C first to ensure the welding quality.

[0003] In related technologies, propane flame heating is generally used to preheat the steel pipe pile, since the work is carried out on the open sea, the flame is easily affected by wind disturbance, causing the flame to drift, resulting in uneven temperature in the heating area, affecting the preheating effect of the steel pipe pile welds. CONTENT OF THE UTILITY MODEL

[0004] In order to avoid the flame drifting as much as possible and improve the preheating effect of the steel pipe pile welds, the present application provides a preheating device for offshore wind power steel pipe pile welds.

[0005] The preheating device for offshore wind power steel pipe pile welds provided by the present application adopts the following technical solution:

[0006] A preheating device for offshore wind power steel pipe pile welds, comprising a combustion nozzle; the combustion nozzle comprises a nozzle inner tube and a nozzle outer tube; the nozzle inner tube comprises a mounting ring and a communication cylinder; the mounting ring is arranged at the top of the nozzle outer tube, the communication cylinder is arranged in the mounting ring, the communication cylinder is located in the nozzle outer tube and a ventilation cavity is formed between the communication cylinder and the nozzle outer tube, a plurality of ventilation holes are formed in the circumferential side of the communication cylinder and are in communication with the ventilation cavity; a first air inlet is arranged on the circumferential side of the nozzle outer tube, the first air inlet is in communication with the ventilation cavity, a second air inlet is arranged at the bottom of the nozzle outer tube, and the second air inlet is in communication with the communication cylinder.

[0007] By adopting the above technical solution, in actual application, propane enters the ventilation cavity through the first air inlet, compressed air enters the communication cylinder through the second air inlet, and propane, compressed air and mixed gas are ignited at the same time in the communication cylinder to form a flame to preheat the welding position, since the compressed air can form an air curtain barrier to offset the influence of wind, the flame drifting is avoided as much as possible, thereby improving the preheating effect of the steel pipe pile welds and enabling the propane to burn more fully.

[0008] Preferably, the combustion nozzle further comprises a first gas quantity adjusting valve, and the first gas quantity adjusting valve is arranged at the first air inlet.

[0009] By adopting the above technical solution, the first gas quantity adjusting valve is arranged to adjust the flow of propane entering the ventilation cavity, thereby improving the effect of propane combustion.

[0010] Preferably, the combustion nozzle further comprises a second air volume adjusting valve, which is arranged in the second air inlet.

[0011] By adopting the above technical scheme, the second air volume adjusting valve is arranged to adjust the flow of compressed air entering the communicating cylinder, and cooperates with the first air volume adjusting valve to make the adjustment more flexible, thereby further improving the propane combustion effect.

[0012] Preferably, the nozzle inner pipe is detachably connected to the nozzle outer pipe.

[0013] By adopting the above technical scheme, the nozzle inner pipe is detachably connected to the nozzle outer pipe, so as to facilitate the maintenance or separate replacement of the nozzle inner pipe and the nozzle outer pipe.

[0014] Preferably, the combustion nozzle further comprises a plurality of connecting bolts, which are arranged at intervals along the circumference of the mounting ring, one end of each connecting bolt is arranged in the mounting ring and is threadedly connected to the nozzle outer pipe, and the other end of each connecting bolt abuts against the mounting ring.

[0015] By adopting the above technical scheme, the plurality of connecting bolts are arranged to achieve the detachable connection between the nozzle inner pipe and the nozzle outer pipe, which is simple in structure and convenient to operate.

[0016] Preferably, the preheating device further comprises a fixing support, and the nozzle outer pipe is arranged in the fixing support.

[0017] By adopting the above technical scheme, during the welding process, the steel pipe pile is rolled by the roller frame, and the fixing support fixes the combustion nozzle to improve the preheating effect.

[0018] Preferably, the fixing support comprises a base, a supporting rod and an adjusting rod, the supporting rod is arranged in the base, the adjusting rod is rotatably connected to one end of the supporting rod away from the base, and the nozzle outer pipe is arranged at one end of the adjusting rod.

[0019] By adopting the above technical scheme, the base, the supporting rod and the adjusting rod are arranged, and the position of the combustion nozzle can be adjusted by rotating the adjusting rod, so that the preheating position of the steel pipe pile is more accurate.

[0020] Preferably, the fixing support further comprises a limiting rod and a latch, the adjusting rod is arranged with a plurality of adjusting holes at intervals along the length direction of the adjusting rod, one end of the limiting rod is rotatably connected to the supporting rod, and the latch is inserted into the other end of the limiting rod and one of the adjusting holes.

[0021] By adopting the above technical scheme, the limiting rod and the latch are arranged to fix the adjusting rod after rotation, which is simple in structure and convenient to operate.

[0022] In summary, the present application includes at least one of the following beneficial technical effects:

[0023] 1. In practical application, propane enters the ventilation cavity through the first gas inlet, compressed air enters the connecting cylinder through the second gas inlet, propane, compressed air and mixed gas are ignited at the same time in the connecting cylinder to form a flame to preheat the welding position, and due to the air curtain barrier formed by the compressed air, the flame is prevented from drifting as much as possible, thereby improving the effect of preheating the steel pipe pile welding seam, and the propane can be more fully combusted;

[0024] 2. By setting the first gas quantity adjusting valve, the flow of propane entering the ventilation cavity is adjusted, and by setting the second gas quantity adjusting valve, the flow of compressed air entering the connecting cylinder is adjusted, and the first gas quantity adjusting valve is cooperated to make the adjustment more flexible, thereby further improving the effect of propane combustion;

[0025] 3. By setting the base, support rod and adjusting rod, the position of the combustion nozzle can be adjusted by rotating the adjusting rod, so that the preheating position of the steel pipe pile is more accurate. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 is the overall structure schematic diagram of the combustion nozzle in the embodiment of the present application;

[0027] Figure 2 is the cross-sectional structure schematic diagram of the combustion nozzle in the embodiment of the present application;

[0028] Figure 3 is the explosion structure schematic diagram of the combustion nozzle in the embodiment of the present application;

[0029] Figure 4 is the overall structure schematic diagram of the preheating device in the embodiment of the present application.

[0030] Fig. 1 is a combustion nozzle; 11 is a nozzle inner tube; 111 is a mounting ring; 112 is a connecting cylinder; 113 is a ventilation hole; 12 is a nozzle outer tube; 121 is a first gas inlet; 122 is a second gas inlet; 13 is a ventilation cavity; 14 is a first gas quantity adjusting valve; 15 is a second gas quantity adjusting valve; 16 is a connecting bolt; 2 is a fixed support; 21 is a base; 22 is a support rod; 23 is an adjusting rod; 24 is a limiting rod; 25 is a bolt; 26 is an adjusting hole. DETAILED DESCRIPTION

[0031] The following will be described in detail in combination with the accompanying Figures 1-4 The present application will be further described in detail.

[0032] The embodiment of the present application discloses a preheating device for offshore wind power steel pipe pile welding seam.

[0033] Referring to Figure 1 and Figure 2 , the preheating device comprises a combustion torch 1, specifically, the combustion torch 1 comprises a torch inner tube 11 and a torch outer tube 12, the torch inner tube 11 comprises a mounting ring 111 and a communication cylinder 112, the mounting ring 111 is annular and fixedly connected to the top of the torch outer tube 12, the communication cylinder 112 is provided in a cylindrical shape, the communication cylinder 112 is integrally connected to the lower side of the mounting ring 111 and located in the torch outer tube 12, so that the communication cylinder 112 and the torch outer tube 12 form an air passage 13 therebetween, and a plurality of air holes 113 are uniformly arranged on the circumferential side of the communication cylinder 112, each air hole 113 is in communication with the air passage 13.

[0034] A first gas inlet nozzle 121 is fixedly connected to the circumferential side of the torch outer tube 12, the first gas inlet nozzle 121 is in communication with the air passage 13 and is used for the inlet of propane, and a second gas inlet nozzle 122 is fixedly connected to the bottom of the torch outer tube 12, the second gas inlet nozzle 122 is in communication with the communication cylinder 112 and is used for the inlet of compressed air.

[0035] In actual application, propane enters the air passage 13 through the first gas inlet nozzle 121, compressed air enters the communication cylinder 112 through the second gas inlet nozzle 122, propane, compressed air and mixed gas are ignited to form a flame in the communication cylinder 112, the ignition mode can be manual or by installing an automatic ignition part to preheat the welding position. Among them, since the compressed air with a range of 0.4-0.6Mpa can form an air curtain barrier to offset the influence of wind and avoid the dispersion of flame as much as possible, the effect of preheating the steel pipe pile weld is improved, and propane can be burned more fully.

[0036] In addition, due to the compressed air jet, propane secondary combustion can be accelerated, the flame temperature can be increased to 2600-2800℃, and the heating bandwidth can be increased by 40% and the temperature uniformity deviation can be ≤±5℃ due to the synergistic effect of the two air flows.

[0037] Referring to Figure 1 In some embodiments, the combustion torch 1 further comprises a first gas quantity adjusting valve 14, the first gas quantity adjusting valve 14 is installed at the first gas inlet nozzle 121, the flow of propane entering the air passage 13 is adjusted through the first gas quantity adjusting valve 14 to improve the effect of propane combustion.

[0038] In some embodiments, the combustion torch 1 further comprises a second gas quantity adjusting valve 15, the second gas quantity adjusting valve 15 is installed at the second gas inlet nozzle 122, the flow of compressed air entering the communication cylinder 112 is adjusted through the second gas quantity adjusting valve 15, the second gas quantity adjusting valve 15 cooperates with the first gas quantity adjusting valve 14 to make the proportion adjustment of propane and compressed air more flexible, thereby further improving the effect of propane combustion.

[0039] Referring to Figure 1 and Figure 3 In some embodiments, the inner nozzle tube 11 is detachably connected to the outer nozzle tube 12, so that the inner nozzle tube 11 and the outer nozzle tube 12 can be separated to facilitate maintenance or separate replacement of the inner nozzle tube 11 and the outer nozzle tube 12.

[0040] In some embodiments, the combustion nozzle 1 further comprises a plurality of connecting bolts 16, which are uniformly spaced along the circumference of the mounting ring 111, the lower end of the connecting bolt 16 is threaded into the top of the outer nozzle tube 12 and abuts the upper side of the mounting ring 111, to achieve detachable connection between the inner nozzle tube 11 and the outer nozzle tube 12, which is simple in structure and convenient to operate, thereby facilitating the installation and disassembly of the inner nozzle tube 11 and the outer nozzle tube 12.

[0041] Referring to Figure 4 In some embodiments, the preheating device further comprises a fixed support 2, and the outer nozzle tube 12 is fixedly connected to the fixed support 2. During the welding process, the steel pipe pile is rolled by the roller frame, and the fixed support 2 is placed on the ground and fixed to the combustion nozzle 1, so that the combustion nozzle 1 can uniformly preheat each position of the steel pipe pile to improve the preheating effect.

[0042] In some embodiments, the fixed support 2 comprises a base 21, a support rod 22 and an adjusting rod 23, the lower end of the support rod 22 is fixedly connected to the base 21, and the adjusting rod 23 is rotatably connected to the upper end of the support rod 22, and one end of the outer nozzle tube 12 is fixedly connected to the adjusting rod 23, so that the position of the combustion nozzle 1 can be adjusted by rotating the adjusting rod 23, which makes the preheating position of the steel pipe pile more accurate and can be used in different working scenarios to improve the applicability.

[0043] In some embodiments, the fixed support 2 further comprises a limiting rod 24 and a latch 25, the adjusting rod 23 is uniformly spaced along the length direction of the adjusting rod 23 and is provided with a plurality of adjusting holes 26, one end of the limiting rod 24 is rotatably connected to the support rod 22, and the latch 25 is inserted into the other end of the limiting rod 24 and one of the adjusting holes 26 to fix the adjusting rod 23 after rotation, which is simple in structure and convenient to operate.

[0044] The implementation principle of the embodiment is that in actual application, propane enters the ventilation cavity 13 through the first gas inlet nozzle 121, compressed air enters the communication cylinder 112 through the second gas inlet nozzle 122, and the propane, the compressed air and the mixed gas are ignited to form a flame in the communication cylinder 112, and the ignition mode can be manual or automatic ignition parts are installed to preheat the welding position. Among them, since the compressed air with a range of 0.4-0.6Mpa can form an air curtain barrier to offset the influence of wind and avoid the dispersion of the flame as much as possible, the effect of the steel pipe pile welding seam preheating is improved, and the propane can be more fully burned.

[0045] In addition, due to the compressed air jet, the propane secondary combustion can be accelerated, the flame temperature can be increased to 2600-2800℃, and the heating bandwidth can be increased by 40% and the temperature uniformity deviation is ≤±5℃.

[0046] The above are preferred embodiments of the application, and are not intended to limit the protection scope of the application, so: any equivalent changes made on the basis of the structure, shape and principle of the application should be covered within the protection scope of the application.

Claims

1. A preheating device for offshore wind turbine steel pipe pile welds, characterized in that, The combustion nozzle (1) comprises a nozzle inner tube (11) and a nozzle outer tube (12); the nozzle inner tube (11) comprises a mounting ring (111) and a communication cylinder (112); the mounting ring (111) is arranged at the top of the nozzle outer tube (12), the communication cylinder (112) is arranged on the mounting ring (111), and the communication cylinder (112) is located in the nozzle outer tube (12) and forms an air passage (13) with the nozzle outer tube (12); a plurality of air holes (113) are arranged on the circumferential side of the communication cylinder (112) and are in communication with the air passage (13); a first air inlet nozzle (121) is arranged on the circumferential side of the nozzle outer tube (12) and is in communication with the air passage (13); and a second air inlet nozzle (122) is arranged at the bottom of the nozzle outer tube (12) and is in communication with the communication cylinder (112).

2. A preheating device for offshore wind power steel pipe pile weld according to claim 1, characterized in that, The combustion nozzle (1) further comprises a first air volume adjusting valve (14) arranged at the first air inlet nozzle (121).

3. A device for preheating weld seams of offshore windmill steel pipe piles according to claim 2, characterized in that, The combustion nozzle (1) further comprises a second air volume adjusting valve (15) arranged at the second air inlet nozzle (122).

4. A preheating device for offshore wind power steel pipe pile weld according to claim 1, characterized in that, The nozzle inner tube (11) is detachably connected to the nozzle outer tube (12).

5. A preheating device for offshore wind power steel pipe pile weld according to claim 2, characterized in that, The combustion nozzle (1) further comprises a plurality of connecting bolts (16) arranged at intervals along the circumferential direction of the mounting ring (111); one end of the connecting bolt (16) is arranged through the mounting ring (111) and is threadedly connected to the nozzle outer tube (12); and the other end of the connecting bolt (16) abuts against the mounting ring (111).

6. A preheating device for offshore wind power steel pipe pile weld according to claim 1, characterized in that, The preheating device further comprises a fixed support (2), and the nozzle outer tube (12) is arranged on the fixed support (2).

7. A device for preheating weld seams of offshore wind turbine steel pipe piles according to claim 6, characterized in that The fixed support (2) comprises a base (21), a support rod (22), and an adjusting rod (23); the support rod (22) is arranged on the base (21); the adjusting rod (23) is rotationally connected to one end of the support rod (22) away from the base (21); and the nozzle outer tube (12) is arranged on one end of the adjusting rod (23).

8. A device for preheating weld seams of offshore wind turbine steel pipe piles according to claim 7, characterized in that The fixed support (2) further comprises a limiting rod (24) and a latch (25); a plurality of adjusting holes (26) are arranged at intervals along the length direction of the adjusting rod (23); one end of the limiting rod (24) is rotationally connected to the support rod (22); and the latch (25) is inserted into the other end of the limiting rod (24) and one of the adjusting holes (26).