阅读说明：本技术 一种风电装置的支架焊接工艺 (Bracket welding process of wind power device ) 是由 邹福生 于 2020-04-16 设计创作，主要内容包括：本发明公开了一种风电装置的支架焊接工艺,包括以下顺序步骤：(1)焊前准备：施焊前先清洗,焊缝区母材表面20～30mm范围内的氧化物、油、垢锈等彻底清理干净,呈现均匀的金属光泽,清洗后进行预热；焊接前检查CO2气体,其体积比≥999％；含水量＜0.005％,瓶内压＞1Mpa；(2)焊接：焊缝引出长度＞25mm。其引弧板和引出板宽度＞50mm,长度为板厚的1.5倍,且不小于30mm,厚度大于6mm；(3)焊后处理：焊接完后进行退火去内应力。采用本发明的焊接工艺的焊缝一次检测合格率高,避免了不必要的返修,施工质量高,降低了质量成本；再者,施工工艺可操作性强,易操作,在实际应用中质量和安全事故率均为零,安全可靠。(The invention discloses a support welding process of a wind power device, which comprises the following steps in sequence: (1) preparing before welding: cleaning is carried out before welding, oxides, oil, scale, rust and the like in the range of 20-30 mm on the surface of a base metal in a welding seam area are thoroughly cleaned, uniform metal luster is presented, and preheating is carried out after cleaning; checking CO2 gas before welding, wherein the volume ratio is more than or equal to 999 percent; the water content is less than 0.005 percent, and the internal pressure of the bottle is more than 1 Mpa; (2) welding: the lead-out length of the welding seam is more than 25 mm. The width of the arc striking plate and the width of the lead-out plate are more than 50mm, the length of the arc striking plate and the lead-out plate is 1.5 times of the plate thickness and is not less than 30mm, and the thickness of the arc striking plate and the lead-out plate is more than 6 mm; (3) post-welding treatment: and annealing to remove internal stress after welding. The welding seam one-time detection qualification rate of the welding process is high, unnecessary repair is avoided, the construction quality is high, and the quality cost is reduced; moreover, the construction process has strong operability and easy operation, and the quality and the safety accident rate are zero in practical application, thereby being safe and reliable.)

1. The support welding process of the wind power device is characterized in that: the welding process comprises the following sequential steps:

(1) preparing before welding: cleaning is carried out before welding, oxides, oil, scale, rust and the like in the range of 20-30 mm on the surface of a base metal in a welding seam area are thoroughly cleaned, uniform metal luster is presented, and preheating is carried out after cleaning;

checking CO2 gas before welding, wherein the volume ratio is more than or equal to 999 percent; the water content is less than 0.005 percent, and the internal pressure of the bottle is more than 1 Mpa;

(2) welding: the lead-out length of the welding seam is more than 25 mm. The width of the arc striking plate and the width of the lead-out plate are more than 50mm, the length of the arc striking plate and the lead-out plate is 1.5 times of the plate thickness and is not less than 30mm, and the thickness of the arc striking plate and the lead-out plate is more than 6 mm;

(3) post-welding treatment: and annealing to remove internal stress after welding, and removing the arc striking plate and the end plate by flame cutting.

2. The bracket welding process of the wind power device according to claim 1, characterized in that: in the welding process of the step (2), the diameter of the welding wire is 1.0-1.2mm, and the current is 100-130A.

3. The bracket welding process of the wind power device according to claim 1, characterized in that: the gas flow during welding is 13L-15L.

4. The bracket welding process of the wind power device according to claim 1, characterized in that: the preheating process before welding is heating by adopting an electric heating method.

5. The bracket welding process of the wind power device according to claim 4, characterized in that: the preheating process comprises the following steps: uniformly heating the welding part, wherein the temperature of the welding position is 125-175 ℃, the measurement position of the preheating temperature is symmetrically measured at a position 20mm away from the center line of the welding line, and each welding line measurement point is not less than 3 pairs.

6. The bracket welding process of the wind power device according to claim 1, characterized in that: in the step of annealing and internal force removal, the heating temperature of annealing is 260-300 ℃, the heating time is 1.5-2 h, and then the annealing furnace is placed in the air for free cooling.

7. The bracket welding process of the wind power device according to claim 1, characterized in that: the post-weld treatment step further comprises post-weld dehydrogenation treatment which is carried out immediately after welding and adopts an electric heating method, the post-heat temperature is as follows: 200-250 ℃, post-heat time: 0.5-1.0 h.

Technical Field

The invention belongs to the technical field of welding processes, and particularly relates to a support welding process of a wind power device.

Background

The traditional fuel energy is decreasing day by day, and the harm to the environment is increasingly prominent. At this time, the focus of attention of people in the world is the clean energy with its unique advantages. Wind is an energy source without public nuisance, the wind power generation is very environment-friendly, and the generated electric energy is very huge, so that more and more countries pay more attention to the wind power generation. Wind energy is increasingly gaining attention as a clean renewable energy source in all countries of the world. The wind energy is huge, the global wind energy is about 2.74 multiplied by 10^9MW, wherein the available wind energy is 2 multiplied by 10^7MW, which is 10 times larger than the total amount of water energy which can be developed and utilized on the earth. Abundant wind is an important energy source and is an inexhaustible pollution-free energy source. How to effectively utilize and develop wind resources has been a continuing direction of effort in the scientific community.

The wind energy has wide application prospect, but the generation by utilizing the wind energy is limited by conditions such as position, topography and the like. The traditional fixed wind power generation equipment is characterized in that a wind power generator set is mounted at the top of a fixedly arranged tower to form a wind power generation tower, wind power is mainly used for pushing fan blades to rotate by means of wind power to convert wind energy into electric energy, azimuth angles of the fan blades are fixed, China is vast, most regions belong to temperate zone monsoon climate zones, wind directions and wind power are changed due to different seasons and terrains, and the existing wind power generator has the defects of complex manufacturing process and unstable quality.

Disclosure of Invention

The invention mainly solves the technical problem of providing a support welding process of a wind power device, which can improve the preparation efficiency of a support and reduce the rejection rate, and a systematic welding method can effectively reduce the preparation cost; moreover, the construction process has strong operability and easy operation, and the quality and the safety accident rate are zero in practical application, thereby being safe and reliable.

In order to solve the technical problems, the invention adopts a technical scheme that:

a welding process for a bracket of a wind power device comprises the following sequential steps:

(1) preparing before welding: cleaning is carried out before welding, oxides, oil, scale, rust and the like in the range of 20-30 mm on the surface of a base metal in a welding seam area are thoroughly cleaned, uniform metal luster is presented, and preheating is carried out after cleaning;

checking CO2 gas before welding, wherein the volume ratio is more than or equal to 999 percent; the water content is less than 0.005 percent, and the internal pressure of the bottle is more than 1 Mpa;

(2) welding: the lead-out length of the welding seam is more than 25 mm. The width of the arc striking plate and the width of the lead-out plate are more than 50mm, the length of the arc striking plate and the lead-out plate is 1.5 times of the plate thickness and is not less than 30mm, and the thickness of the arc striking plate and the lead-out plate is more than 6 mm;

(3) post-welding treatment: and annealing to remove internal stress after welding, and removing the arc striking plate and the end plate by flame cutting.

In the welding step (2), the diameter of the welding wire is 1.0-1.2mm, and the current is 100-130A.

Further, the gas flow rate during welding is 13L-15L.

Further, the preheating process before welding is heating by adopting an electric heating method.

Further, the preheating process comprises the following steps: uniformly heating the welding part, wherein the temperature of the welding position is 125-175 ℃, the measurement position of the preheating temperature is symmetrically measured at a position 20mm away from the center line of the welding line, and each welding line measurement point is not less than 3 pairs.

Further, in the step of annealing and removing the internal force, the heating temperature of the annealing is 260-300 ℃, the heating time is 1.5-2 h, and then the annealing is placed in the air for free cooling.

Further, the post-weld treatment step further includes post-weld dehydrogenation treatment which is performed immediately after welding and adopts an electric heating method, the post-heat temperature: 200-250 ℃, post-heat time: 0.5-1.0 h.

The invention has the beneficial effects that:

the preparation method can improve the preparation efficiency of the bracket and reduce the rejection rate, and the systematic welding method can effectively reduce the preparation cost; moreover, the construction process has strong operability and easy operation, and the quality and the safety accident rate are zero in practical application, thereby being safe and reliable.

The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood and to be implemented according to the content of the description, the following detailed description is given of preferred embodiments of the present invention.

Detailed Description

The following detailed description of the preferred embodiments of the present invention is provided to enable those skilled in the art to more readily understand the advantages and features of the present invention, and to clearly and unequivocally define the scope of the present invention.

Example (b):

a welding process for a bracket of a wind power device comprises the following sequential steps:

(1) preparing before welding: cleaning is carried out before welding, oxides, oil, scale, rust and the like in the range of 20-30 mm on the surface of a base metal in a welding seam area are thoroughly cleaned, uniform metal luster is presented, and preheating is carried out after cleaning;

checking CO2 gas before welding, wherein the volume ratio is more than or equal to 999 percent; the water content is less than 0.005 percent, and the internal pressure of the bottle is more than 1 Mpa;

(2) welding: the lead-out length of the welding seam is more than 25 mm. The width of the arc striking plate and the width of the lead-out plate are more than 50mm, the length of the arc striking plate and the lead-out plate is 1.5 times of the plate thickness and is not less than 30mm, and the thickness of the arc striking plate and the lead-out plate is more than 6 mm;

(3) post-welding treatment: and annealing to remove internal stress after welding, and removing the arc striking plate and the end plate by flame cutting.

In the welding process of the step (2), the diameter of the welding wire is 1.0-1.2mm, and the current is 100-130A.

The gas flow during welding is 13L-15L.

The preheating process before welding is heating by adopting an electric heating method.

The preheating process comprises the following steps: uniformly heating the welding part, wherein the temperature of the welding position is 125-175 ℃, the measurement position of the preheating temperature is symmetrically measured at a position 20mm away from the center line of the welding line, and each welding line measurement point is not less than 3 pairs.

In the step of annealing and internal force removal, the heating temperature of annealing is 260-300 ℃, the heating time is 1.5-2 h, and then the annealing furnace is placed in the air for free cooling.

The post-weld treatment step further comprises post-weld dehydrogenation treatment which is carried out immediately after welding and adopts an electric heating method, the post-heat temperature is as follows: 200-250 ℃, post-heat time: 0.5-1.0 h.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations and positional relationships that are conventionally used in the products of the present invention, and are used merely for convenience in describing the present invention and for simplicity in description, but do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent structural changes made by using the contents of the present specification, or any other related technical fields directly or indirectly, are included in the scope of the present invention.