阅读说明：本技术 重型防腐防火阻燃钢结构生产方法 (Production method of heavy-duty anticorrosive fireproof flame-retardant steel structure ) 是由 王凯 窦心涛 张路锋 于 2020-06-03 设计创作，主要内容包括：本发明涉及一种重型防腐防火阻燃钢结构生产方法,其属于喷涂设备生产方法技术领域。包括以下步骤：用悬挂输送装置将钢结构输送至带有中压风机的除尘箱内进行处理；将除尘后的钢结构输送至预热炉内进行预加热,预加热后的钢结构依次输送至喷粉房甲和喷粉房乙内进行两次粉末喷涂,喷涂后的钢结构输送至固化炉内进行粉末固化,固化后的钢结构输送至冷却区进行常温自然冷却。本发明的有益效果是：两次除尘,保证喷涂效果,采用两次喷涂的方式,喷涂效果好,喷逸和沉积的粉末涂料可经回收筛选后循环利用,降低成本,固化炉的温度均匀,保温效果好,降低能耗,且喷涂功能性涂料,达到了防火阻燃的功能。(The invention relates to a production method of a heavy-duty anticorrosive fireproof flame-retardant steel structure, and belongs to the technical field of production methods of spraying equipment. The method comprises the following steps: conveying the steel structure into a dust removal box with a medium pressure fan by using a suspension conveying device for treatment; the steel construction after will removing dust is carried and is preheated in preheating the stove, and the steel construction after preheating carries in proper order and carries out twice powder spraying in room first and the room second that dusts, and the steel construction after the spraying carries and carries out the powder solidification in the stove to solidifying, and the steel construction after the solidification carries and carries out normal atmospheric temperature natural cooling to the cooling space. The invention has the beneficial effects that: the dust removal is carried out twice, the spraying effect is ensured, the spraying effect is good by adopting the spraying mode twice, the sprayed and escaped powder coating and the deposited powder coating can be recycled after being recycled and screened, the cost is reduced, the temperature of the curing furnace is uniform, the heat preservation effect is good, the energy consumption is reduced, and the functional coating is sprayed, so that the fireproof and flame-retardant functions are achieved.)

1. A production method of a heavy-duty anticorrosion fireproof flame-retardant steel structure is characterized by comprising the following steps:

(1) conveying the steel structure into a dust removal box with a medium pressure fan by using a suspension conveying device, and treating the sand dust adhered to the surface of the steel structure;

(2) the suspension conveying device conveys the steel structure after dust removal to a preheating furnace with a high-wind-speed air heater for preheating, and the high-wind-speed air heater performs secondary dust removal on the steel structure while preheating;

(3) the suspended conveying device conveys the preheated steel structure to a powder spraying room A and a powder spraying room B in sequence for powder spraying twice, and the thickness of the powder spraying twice is 125-400 mm;

(4) the suspension conveying device conveys the steel structure subjected to the powder spraying twice into a curing furnace with a hot air circulating fan and infrared tracking for powder curing;

(5) and the suspension conveying device conveys the solidified steel structure to a cooling area for natural cooling at normal temperature.

2. The method for producing the heavy-duty anticorrosion fireproof flame-retardant steel structure according to claim 1, wherein: and anticorrosive epoxy zinc-rich powder and fireproof flame-retardant functional powder are sprayed on the steel structure in the powder spraying room A and the powder spraying room B respectively.

3. The method for producing the heavy-duty anticorrosion fireproof flame-retardant steel structure according to claim 1, wherein: two air volumes of 20000m are arranged in the dust removal box³The medium pressure fan is used for the first time, and the dust removal box is a dust removal box provided with a filter element.

4. The method for producing the heavy-duty anticorrosion fireproof flame-retardant steel structure according to claim 1, wherein: the preheating furnace adopts a cabinet type furnace structure and consists of a drying tunnel furnace body, a heating system, an automatic temperature control system, an air supply pipe and an air return pipe, wherein the air supply pipe and the air return pipe are respectively arranged at the bottom and the top of the drying tunnel furnace body, the heating system adopts natural gas for heating, an inlet and an outlet which can pass through a steel structure are arranged at the left end and the right end of the drying tunnel furnace body, and an air curtain is arranged at the inlet and the outlet for heat insulation.

5. The method for producing the heavy-duty anticorrosion fireproof flame-retardant steel structure according to claim 1, wherein: and spraying devices are respectively arranged on two sides of the powder spraying room A and the powder spraying room B, and bottom plate cleaning and purging systems capable of cleaning, purging and recycling unadsorbed powder for secondary utilization are arranged at the bottoms of the powder spraying room A and the powder spraying room B.

6. The method for producing the heavy-duty anticorrosion fireproof flame-retardant steel structure according to claim 1, wherein: the curing oven is formed by the laminboard concatenation that accompanies the rock wool heated board, and adopts the cornerite to strengthen all around, is equipped with thermal cycle fan and infrared temperature tracking in the curing oven, infrared temperature tracking adopts PID single-point accuse temperature.

7. The method for producing the heavy-duty anticorrosion fireproof flame-retardant steel structure according to claim 1, wherein: the steel structure is hung on the hanging chain by adopting a transverse hanging method, and the steel structure is conveyed in a stacking type hanging manner during feeding and discharging.

Technical Field

The invention relates to a production method of a heavy-duty anticorrosive fireproof flame-retardant steel structure, and belongs to the technical field of production methods of spraying equipment.

Background

Powder spraying is to spray powder coating on the surface of a workpiece by using powder spraying equipment (an electrostatic plastic spraying machine), and powder can be uniformly adsorbed on the surface of the workpiece under the action of static electricity to form a powdery coating; the powdery coating is baked, leveled and cured at high temperature to become final coatings with different effects (different kinds of effects of the powdery coating); the spraying effect of the powder spraying is superior to that of a paint spraying process in the aspects of mechanical strength, adhesive force, corrosion resistance, aging resistance and the like, and the cost is also lower than that of the paint spraying with the same effect.

Patent publication No. CN106914389A discloses a continuous powder coating production method for steel workpieces, in which spraying of a steel radiator is mentioned, but the spraying method takes a long time, needs to be dried for 12min and cooled for 16min, has low overall working efficiency, and adopts one-time spraying, the powder directly contacts with the surface of the workpiece, the spraying effect is not good, and the method is only limited to processing small workpieces, and is not suitable for steel structures of about 18 m.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: overcomes the defects in the prior art and provides a production method of a heavy-duty anticorrosion fireproof flame-retardant steel structure.

The technical scheme for solving the technical problems is as follows:

a production method of a heavy-duty anticorrosion fireproof flame-retardant steel structure comprises the following steps:

(1) conveying the steel structure into a dust removal box with a medium pressure fan by using a suspension conveying device, and treating the sand dust adhered to the surface of the steel structure;

(2) the suspension conveying device conveys the steel structure after dust removal to a preheating furnace with a high-wind-speed air heater for preheating, and the high-wind-speed air heater performs secondary dust removal on the steel structure while preheating;

(3) the suspended conveying device conveys the preheated steel structure to a powder spraying room A and a powder spraying room B in sequence for powder spraying twice, and the thickness of the powder spraying twice is 125-400 mm;

(4) the suspension conveying device conveys the steel structure subjected to the powder spraying twice into a curing furnace with a hot air circulating fan and infrared tracking for powder curing, and the conveying speed of the steel structure in the curing furnace is 2-3 m/s;

(5) and the suspension conveying device conveys the solidified steel structure to a cooling area for natural cooling at normal temperature.

Preferably, anticorrosive epoxy zinc-rich powder and fireproof flame-retardant functional powder are sprayed on the steel structure in the powder spraying room A and the powder spraying room B respectively.

Preferably, two air volumes of 20000m are matched in the dust removal box³The medium pressure fan is used for the first time, and the dust removal box is a dust removal box provided with a filter element.

Preferably, the preheating furnace is of a cabinet furnace structure and comprises a drying tunnel furnace body, a heating system, an automatic temperature control system, an air supply pipe and an air return pipe, wherein the air supply pipe and the air return pipe are respectively arranged at the bottom and the top of the drying tunnel furnace body, the heating system is heated by natural gas, an inlet and an outlet which can pass through a steel structure are arranged at the left end and the right end of the drying tunnel furnace body, and an air curtain is arranged at the inlet and the outlet for heat insulation.

Preferably, the powder spraying room A and the powder spraying room B are respectively provided with a spraying device at two sides, and the bottoms of the powder spraying room A and the powder spraying room B are provided with a bottom plate cleaning and purging system, so that powder coating which is sprayed and deposited at the bottom of the powder spraying room can be separated and recovered by a large cyclone with a self-cleaning function, and the powder coating can be recycled after screening. The recovered powder can fall back to the powder supply barrel after being screened and is used after being uniformly mixed. Hand repairing stations are respectively arranged on two sides of the powder spraying room, workpieces needing to be subjected to supplementary spraying are sprayed, the hand repairing stations are externally arranged, the working strength of hand repairing can be reduced, and the operation is more convenient.

Preferably, the curing oven is formed by splicing sandwich plates with rock wool heat insulation plates, the peripheries of the sandwich plates are reinforced by wrap angles, a thermal circulation fan and infrared temperature tracking are arranged in the curing oven, the infrared temperature tracking adopts PID single-point temperature control, and when the temperature in the curing oven is reduced, a signal is sent to improve the temperature in the curing oven.

Preferably, the steel structure is hung on the hanging chain by adopting a transverse hanging method, and the steel structure is conveyed in a stacking type hanging manner during feeding and discharging.

The invention has the beneficial effects that: the utility model discloses a spray coating, including the bottom plate, the bottom plate clearance sweep system of spraying room bottom and recovery wind gap switch-on, can be with spouting elegant and sedimentary powder coating cyclic utilization after retrieving the screening, and reduce cost, the laminboard that has the heat preservation material is chooseed for use to the curing oven, and adopt the heated air circulation mode of bottom air supply top return air, guarantee that the temperature of curing oven is even, it is effectual to keep warm, reduce the energy consumption, and spraying functional coating, the fire-retardant function of preventing fires has been reached.

Drawings

FIG. 1 is a schematic structural diagram of feeding, dedusting and preheating.

FIG. 2 is a schematic diagram of the spraying, curing and cooling structure.

Fig. 3 is a schematic structural diagram of the feeding area.

Fig. 4 is a schematic structural diagram of the dust removal box.

FIG. 5 is a schematic view of the structure of the preheating furnace.

Fig. 6 is a schematic structural view of the powder spraying room.

FIG. 7 is a schematic structural view of a curing oven.

Fig. 8 is a schematic view of the structure of the cooling zone.

Fig. 9 is a schematic structural view of the spray coating device.

Detailed Description

The principles and features of this invention are described below in conjunction with examples which are set forth to illustrate, but are not to be construed to limit the scope of the invention.

A production method of a heavy-duty anticorrosion fireproof flame-retardant steel structure comprises the following steps:

(1) conveying the steel structure into a dust removal box with a medium pressure fan by using a suspension conveying device, and treating the sand dust adhered to the surface of the steel structure;

(2) the suspension conveying device conveys the steel structure after dust removal to a preheating furnace with a high-wind-speed air heater for preheating, and the high-wind-speed air heater performs secondary dust removal on the steel structure while preheating;

(3) the suspended conveying device conveys the preheated steel structure to a powder spraying room A and a powder spraying room B in sequence for powder spraying twice, and the thickness of the powder spraying twice is 125-400 mm;

(4) the suspension conveying device conveys the steel structure subjected to the powder spraying twice into a curing furnace with a hot air circulating fan and infrared tracking for powder curing, and the conveying speed of the steel structure in the curing furnace is 2-3 m/s;

(5) and the suspension conveying device conveys the solidified steel structure to a cooling area for natural cooling at normal temperature.

Preferably, anticorrosive epoxy zinc-rich powder and fireproof flame-retardant functional powder are sprayed on the steel structure in the powder spraying room A and the powder spraying room B respectively.

Two air volumes of 20000m are arranged in the dust removal box³The medium pressure fan is used for the first time, and the dust removal box is a dust removal box provided with a filter element.

The preheating furnace adopts a cabinet type furnace structure and consists of a drying tunnel furnace body, a heating system, an automatic temperature control system, an air supply pipe and an air return pipe, wherein the air supply pipe and the air return pipe are respectively arranged at the bottom and the top of the drying tunnel furnace body, the heating system adopts natural gas for heating, an inlet and an outlet which can pass through a steel structure are arranged at the left end and the right end of the drying tunnel furnace body, and an air curtain is arranged at the inlet and the outlet for heat insulation.

And spraying devices are respectively arranged on two sides of the powder spraying room A and the powder spraying room B, and bottom plate cleaning and purging systems are arranged at the bottoms of the powder spraying room A and the powder spraying room B, so that powder coating which is sprayed and deposited at the bottom of the powder spraying room can be separated and recovered by a cyclone with a self-cleaning function, and can be recycled after screening. The recovered powder can fall back to the powder supply barrel after being screened and is used after being uniformly mixed. Hand repairing stations are respectively arranged on two sides of the powder spraying room, workpieces needing to be subjected to supplementary spraying are sprayed, the hand repairing stations are externally arranged, the working strength of hand repairing can be reduced, and the operation is more convenient.

The curing oven is formed by splicing sandwich plates with rock wool heat insulation plates, wrap angles are adopted for reinforcing the periphery of the sandwich plates, a thermal circulation fan and infrared temperature tracking are arranged in the curing oven, the infrared temperature tracking adopts PID single-point temperature control, and when the temperature in the curing oven is reduced, a signal is sent to improve the temperature in the curing oven.

The steel structure is hung on the hanging chain by adopting a transverse hanging method, and the steel structure is conveyed in a stacking type hanging manner during feeding and discharging.

The working principle is as follows:

during steel structure spraying processing, the steel structure is conveyed to the dust removal box by the hanging conveying device to remove dust, the steel structure after dust removal is conveyed to the preheating furnace by the chain of the hanging conveying device to be heated and simultaneously subjected to secondary dust removal, the preheated steel structure enters the powder spraying room A to be sprayed with epoxy zinc-rich powder with an anti-corrosion function, then enters the powder spraying room B to be sprayed with fireproof and flame-retardant functional powder, meanwhile, the steel structure is manually sprayed separately to a place needing to be subjected to supplementary spraying, the spraying effect is ensured, the steel structure after spraying is finished enters the curing furnace to be cured, and the steel structure penetrates through the curing furnace to enter a cooling area at the speed of 2-.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.