CN111607813A - Full-automatic cleaning production line for electro-galvanizing of precise slender steel pipe - Google Patents

Abstract

The invention discloses a professional full-automatic cleaning and processing production line for electro-galvanizing of precise slender steel pipes, which is arranged in a closed workshop to form a negative pressure horizontal environment, the production line is sequentially completed by arranging nearly 50 special groove bodies which can meet the requirements of a galvanizing process according to the process flow, and the production line comprises the steps of hot degreasing, ultrasonic degreasing, water washing, acid washing, water washing, electrolytic cleaning, ultrasonic cleaning, water washing, surface activation, water washing, neutralization, electro-galvanizing, water washing, ultrasonic water washing, light extraction, water washing, exchange, trivalent passivation, surface conversion passivation film (multicolored, army green and black zinc) production, water washing, hot water washing, sealing, blow-drying and drying; the transfer device for completing the whole process of the workpiece process flow is realized by combining a suspended double-lifting gantry crane and a flying-bus polar plate hanger, all processes are completed by starting a full-automatic set process beat under the control of a computer program by one key, and the production line is provided with a waste gas and wastewater treatment and discharge system device which fully meets the requirement of clean production.

Description

Full-automatic cleaning production line for electro-galvanizing of precise slender steel pipe

Technical Field

The invention relates to the field of surface treatment processing for manufacturing of slender precise cold-drawn seamless steel tubes, in particular to a professional full-automatic cleaning production line for electrogalvanizing of precise slender cold-drawn seamless steel tubes.

Background

Oil (gas) pipe fittings used in a current hydraulic pneumatic system are manufactured by using a steel pipe which is subjected to precision cold drawing and conforms to national standard GB/T3639 as a blank pipe, high-precision and ultrahigh-precision liquid (gas) pressure seamless steel pipes are generally used in liquid (gas) pipelines in modern equipment manufacturing industry, the product is generally manufactured by a professional factory, the outer diameter of the product is 4-60 mm conventionally, the outgoing length of the product is 6-8 m, and the product belongs to an ultra-thin long pipe. The surface of the pipe fitting needs to be subjected to electro-galvanizing treatment on the outer diameter surface (part of the surface needs to be subjected to the inner diameter surface) on a considerable proportion. Because the pipe fitting has a plurality of diameter series specifications and varieties, the requirements of surface galvanization are very much according to the requirements of users, for example, white galvanization, color galvanization, black zinc, army green and the like, the thicknesses of the plating layers corresponding to different chemical conversion film varieties also have different requirements, and the specifications and the varieties of the combination are various and the process is complicated. The current industrial situation is still in a manual or manual semi-automatic production line flow operation state, still belongs to a production mode with technology intensive and labor intensive coexistence, has low production efficiency and unstable quality, particularly has low level of clean production process, is difficult to solve the labor protection of production line operators, realizes the closed full-automatic production process, becomes the fundamental way for solving the environmental protection and realizing the clean production, also has different galvanizing varieties, has different process flows, process parameters and electroplating solution formulas, needs to produce according to orders in the market, realizes intellectualization and computer program control, realizes that the production line can meet the galvanizing requirements of different specifications and varieties, and has the problem of urgent need to be solved in the industry for batch production and ensuring high quality.

Disclosure of Invention

The invention aims to solve the problems and the defects in the prior art, and provides a full-automatic professional production line which can realize green environmental protection, really meet the requirements of clean production process, meet the requirements of high-end equipment for manufacturing hydraulic and pneumatic fluid transmission, and meet various specifications and varieties of electro-galvanizing process flows of precise seamless steel pipes with various technical conditions.

In order to achieve the aim, the invention provides a full-automatic cleaning production line for electrogalvanizing of a precise elongated steel pipe, which comprises:

the full seal built in the production workshop can ensure the workshop forming negative pressure;

the tank body is positioned in a workshop and is integrated and distributed according to all process flows to realize the galvanizing function, and the tank body sequentially comprises the following components according to the process flows: hot degreasing, ultrasonic degreasing, multi-pass washing, hydrochloric acid pickling, sulfuric acid pickling, multi-pass washing, spray washing, electrolytic washing, ultrasonic washing, multi-pass washing, surface activation, multi-pass washing, neutralization, electrogalvanizing, multi-pass washing, ultrasonic washing, brightening, washing, exchange, trivalent passivation, surface conversion passivation film (multicolored, army green and black zinc), washing, spray washing, hot washing, sealing, blow drying and drying;

the functional tank bodies for realizing the process flow have the characteristics of acid and alkali resistance, sufficient strength and the like, the length, the width and the height of the functional tank bodies are determined according to the length and the required functions of the workpiece and the structure of the hanger, particularly, the workpiece is in curtain type layout on the hanger and has larger height (depth), and each process tank body is provided with a reinforced structure; the tank bodies with various functions are transversely and sequentially arranged according to the sequence of the process flow, and the whole production line is about 60 meters;

four special suspension type gantry cranes with double lifting functions are arranged above the production line tank body, and are used for completing hoisting of the electroplating flying bar combination, moving of the workpiece along the horizontal working procedure direction and accurate lifting, and accurately placing or taking the flying bar combination and the workpiece into or out of each process tank body.

The gantry crane is an execution device for completing the electrogalvanizing process flow of a full-automatic production line and transferring and positioning workpieces according to a set beat, and the gantry crane is erected and fixed above a workshop along a horizontal guide rail of the production line; all the travelling cranes are fixed by the assembled structure through bolts, and the bolts have enough strength and rigidity; electromagnetic and photoelectric induction travel switches are positioned in horizontal and lifting motion, the lifting speed of the gantry crane is 5-18 m/min, and the horizontal speed is 5-30 m/min; the lifting and walking are composed of a motor, a speed reducer, a moving mechanism and a brake, and the walking is provided with a limiting wheel; the device is provided with a maintenance platform, a guardrail and an emergency manual control box; the device can realize the functions of swinging and vertical shaking according to the process requirements when various stations of a multicolour, army green and black zinc passive film are formed on the surface of the device during galvanizing, so as to ensure that galvanizing is uniform and a coating of a part of a hanger which is in supporting contact with a solid line is free from defects.

The full-automatic production line of the invention designs a strong collection and exhaust system for realizing clean production and realizing negative pressure level in a closed workshop, and a process tank for intensively generating harmful gases such as acid, alkali and the like in the production line such as hot degreasing, ultrasonic degreasing, acid washing, first washing after acid washing, electrogalvanizing and the like; the upper edge of the tank body is provided with an approximately square gas collecting pipe, the two sides of the gas collecting pipe are provided with square holes intermittently to collect waste gas transpired from the tank body, meanwhile, a workpiece entering the process tank is hoisted on the flying bar by a herringbone hood along the length direction of the whole tank to collect the waste gas and introduce the waste gas into a gas collecting branch pipe, the two ends of the collecting square pipe are respectively connected with the gas collecting branch pipe and further connected with a pipeline with a larger diameter, the gas collecting hood is arranged intermittently above a workshop and the collecting branch pipe is communicated with a regulating closed main exhaust pipe, the gas is exhausted into the atmosphere completely without harm and odor after being treated by acid removal, alkali removal and harmful gases under the suction of a powerful draught fan, and an exhaust device of the closed workshop is powerful enough to ensure;

the invention can meet the water supply function of the full-automatic production line and achieve the water discharge and wastewater treatment system of clean production, green and environmental protection requirements, the water supply part comprises two water supply pipelines for passing tap water and purified water and electromagnetic switch valves on the pipelines are communicated with each process galvanizing bath; in addition, in order to realize that the liquid in each process tank body needs to be stirred, a compressed air system is required to be introduced, the system is provided with an air inflation pipeline, and the air inflation pipeline is communicated with each required tank body through an electromagnetic valve and is arranged along the length of the tank body, and holes are formed in the internal pipe of the tank at intervals so as to realize the effect of inflating and stirring the liquid by the waste liquid in the tank body; the drainage system mainly comprises waste liquid which exceeds the use standard, mainly alkaline heating waste water, chromium (trivalent) containing waste water, acid containing waste water and alkali containing waste water, wherein the chromium (trivalent) containing waste water, the acid containing waste water and the alkali containing waste water are intensively discharged into a waste water neutralization chemical treatment device after an electromagnetic two-way valve opens a passage, and are further introduced into biochemical treatment outside a production line for further treatment until the waste liquid completely reaches the standard and can be discharged; because the amount is less, the treated reclaimed water is generally used for plant greening or discharged by a special drain pipe, and after waste residues are treated by a filter press, completely solidified and dried harmless waste residues are delivered to a professional company for treatment according to regulations.

In the system, stainless steel heating pipes are arranged in a thermal degreasing tank and a tank which needs temperature control requirements; a gas heating and air supply device is arranged in the drying process;

the system of the invention has a forced cooling refrigeration system for the electroplating solution in the electrogalvanizing procedure;

the invention is provided with an electrolytic zinc melting tank which is used for ensuring zinc ions of an electroplating solution;

the invention has a corresponding DC power supply system;

the invention realizes the monitoring and control of full-automatic production control, and the real-time computer can display a monitoring screen timely for the data acquisition and processing and program control system of temperature, position, time, current, electroplating solution, concentration components and the like and the full scene of production operation;

the workpiece entering and exiting are automatically completed in other enclosed entering and exiting negative pressure workshops which are manually assisted to hang and load and unload materials;

the invention has the functions of prompting and alarming when the working process exceeds the control parameters and faults and has the function of general stop of special faults.

Drawings

FIG. 1 is a process flow and a layout of a working tank of a full-automatic electrogalvanizing cleaning production line for precise slender steel pipes;

FIG. 2 is a working view of the workshop section of the precise elongated steel pipe electrogalvanizing full-automatic cleaning production line, a double-lifting suspension type gantry crane, a hanger workpiece and a groove body position relation;

FIG. 3 is a top view of a double-lift suspended gantry crane;

FIG. 4 is a side view of a double lift suspended gantry crane;

FIG. 5 is a schematic view of an exhaust collection emission treatment system (sub-atmospheric environment);

FIG. 6 is a side view of the exhaust collection system taken along the cross-section of the vehicle;

FIG. 7 is a schematic view of a system for treating wastewater discharged from a feed water system (including an electrogalvanizing rectifier power supply and an electrolytic zinc melting tank);

in the figure:

1-1, a hot degreasing tank; 1-2 ultrasonic degreasing tank; 1-3 rinsing baths; 1-31 of a spray rinsing bath; 1-41 hydrochloric acid pickling tank; 1-42 sulfuric acid pickling tank; 1-5 high-position water washing; 1-6 terminal electrolytic cell; 1-7 ultrasonic rinsing bath; 1-8 activation grooves; 1-9 neutralization tank; 1-10 galvanizing baths; 1-11 light-emitting grooves; 1-12 ion exchange tanks; 1-13 trivalent passivation tanks; 1-14 multicolour passivation tanks; 1-15 army green passivation tanks; 1-16 black zinc passivation tanks; 1-17 hot water washing tank; 1-18 closed cells; 1-19 drying boxes; 1-20 feed trucks; 1-21 discharging vehicle; 1-22 console;

2-1, sealing the workshop; 2-2 double-lifting hanging gantry crane; 2-3 fema combination; 2-4 guide rails; 2-5 cathode slings; 2-6 workpieces; 2-7 groove bodies;

3-1 a walking power system; 3-2, overhauling the platform; 3-3 top beam structure; 3-4 side wall structures;

4-1 double lift system; 4-2 left and right moving device; 4-3 lifting hook

5-1, a process tank for intensively generating waste gas; 5-11 of a rectangular pipe with holes on both sides for collecting waste gas; 5-2 main air pipes; 5-3 acid treatment tower; 5-4 alkaline treatment tower;

6-1 side wind collecting pipe; 6-2 gas collecting hood; 6-3 groove end branch wind pipes; 6-4 ceiling branch air pipes; 6-5 main air pipes; 6-6 regulating valve;

7-1 tap water supply system; 7-2 pure water supply system; 7-3, an air supply system; 7-4 alkaline heating wastewater drainage pipes; 7-5 chromium-containing wastewater drainage pipes; 7-6 acid-containing wastewater drainage pipes; 7-7 alkali-containing wastewater drainage pipes; 7-8 wastewater comprehensive treatment device; 7-9 water supply two-way electromagnetic valve; 7-10 waste water two-way electromagnetic valve; 7-11 air inlet electromagnetic valves; 7-12 production line rectification power supply system;

Detailed Description

The invention will be further explained with reference to the drawings.

The invention discloses a full-automatic electrogalvanizing cleaning production line for precise slender steel pipes, which is shown in figures 1-7 and comprises the following components:

a closed production plant 2-1, as shown in FIG. 2;

the 45 production process tanks arranged in the production workshop 2-1 are sequentially connected and arranged from left to right according to the production process flow as shown in figure 1, and the production process tanks are sequentially numbered according to the function numbers: 2 thermal degreasing tanks with heating function 1-1, 1 ultrasonic degreasing tank 1-2, 21 rinsing tanks 1-3, wherein 4 spray rinsing tanks 1-31, 1 acid pickling hydrochloric acid tank 1-41, and 1 acid pickling sulfuric acid tank 1-42; 1-5 high-position water washing; 2 ultrasonic water washing 1-6 times; 1 to 7 activation grooves; 1 neutralization tank 1-8; 1-9 galvanizing baths with 3 galvanizing tanks; 1 light-emitting groove 1-11; 1 ion exchange tank 1-12; 1 trivalent passivation tank 1-13; 1 colorful passivation groove 1-14; 1 army green passivation tank 1-15; 1 black zinc passivation tank 1-16; 1 hot water washing tank 1-17; 1 closed tank 1-18; 3 drying boxes 1-19;

the length of all the process tanks is determined by the maximum length of the galvanized workpiece, such as the embodiment with the length of 8 meters, the width is determined by the functional internal structure of each tank body, such as the thermal degreasing, pickling tank and galvanizing tank body which need to be heated are wide in size, such as the embodiment with the length of 1.4-1.5 meters, the height is determined by the combination of the workpiece curtain hoisting number set by each tank body and the function of a transfer vehicle, and the tank body of the embodiment is 1.8 meters deep; the reinforced outer part of the groove body 100 is wrapped by PP material through a 50mm square tube welding frame.

The whole diameter is 6-60 mm, the length is 6-8 m, the electroplating process flow of various galvanized varieties is realized, and the length of the whole production line is about 55 meters.

As shown in fig. 2, the functions of horizontal movement positioning, lifting, hoisting and the like of the electroplating production line are completed by four suspended double-lifting gantry cranes which are positioned above a production workshop as shown in fig. 2-1 and a process flow work tank as shown in fig. 2-4 as shown in fig. 2-2;

as shown in fig. 2, the walking gantry crane is composed of a walking power system 3-1, an overhaul platform 3-2, a top beam structure 3-3 and a side wall structure 3-4;

the traveling wheels of the double-gantry traveling system device are placed on and fixed on a bearing support guide rail of a workshop as shown in figure 2, and are positioned on side wall limiting wheels 2-4 to control the positioning of left and right traveling through a photoelectric sensor;

the gantry crane is provided with a double-lifting transmission and hoisting system device as shown in figures 2-24, and as the gantry crane has four gantry cranes and each gantry crane works in a double-lifting mode, 8 lifting mechanisms can work; the workpieces to be plated are hung on a cathode hanger in a curtain form in a double-sided mode as shown in figures 2-6, the hanger is hung on a flying bar combination 2-3, a gantry type lifting hanger 4-3 lifts the flying bar and the lifted workpiece combination to move to the position above a working groove and accurately place the flying bar and the lifted workpiece combination into an electroplating working groove, cathode heads of the workpieces connected in the processes of electrolysis, electroplating and the like are accurately placed into a V-shaped seat, and electroplating anode plates on the two sides of each groove of the electroplating groove are also placed into or lifted from the electroplating groove in the same method.

As shown in figure 4, when a galvanizing bath and five-color, army green and black zinc passivation process stations are arranged, a left-right moving device 4-2 is arranged, and workpieces hoisted on a flying bar can move left and right along the length direction of the bath, so that the effect of uniformity of a plating layer and a passivation layer is achieved.

In one example of the production line of the invention, as shown in fig. 5 and 6, a process tank 5-1 for intensively generating waste gas is provided with a waste gas collecting rectangular pipe 5-11 with holes opened on two sides and a side air collecting pipe 6-1 arranged on two sides of the length of the tank, the pipe extends out in a splayed shape above the rectangle, a gas collecting rectangular hole is opened on the side edge intermittently, the side air collecting pipe 6-1 is communicated with a branch air pipe 6-3 at the tank end, the branch air pipe 6-3 at the tank end is communicated with a main air pipe 5-2, and the processed waste gas is discharged after being processed by an acid cleaning tower 5-3 and an alkaline treatment tower 5-4;

as shown in fig. 6, the gas collecting hoods 6-2 are discontinuously arranged at the top of the closed workshop along the whole length of the production line, and are connected with the ceiling branch air duct 6-4 through a hose above the gas collecting hoods 6-2, and the ceiling branch air duct 6-4 is communicated with the main air duct 5-2; the diameters of the main air ducts 5-2 are 600 mm, 800 mm and 1000 mm respectively, the total length (12+44+33) is 89 m in total, the diameters of the branch air ducts are 200 mm, all the branch air ducts are provided with regulating valves, the exhaust system is provided with two sets of fans, the total power is 80KW, and the total exhaust amount of the automatic line is 12.5 ten thousand cubic meters per hour, which is enough to form a negative pressure environment.

In one example of the production line of the present invention, as shown in fig. 7, a tap water supply system 7-1, a purified water supply system 7-2, and an inflation line 7-3; each pipeline is controlled by a solenoid valve, a tap water main pipe is provided with a pressurizing pump, and 7 groups (pipe diameter) of spraying are provided

Pipes), the distance between the spraying nozzles is 300mm, and the spraying is controlled by a tap water solenoid valve; the air injection pipeline 7-3, namely the compressed air stirring pipe, is divided into a main pipe, a branch pipe and a tank bottom branch pipe, and the tank side branch pipes can be independently controlled.

The drainage pipeline of the production line of the invention is shown in figure 7, the main pipe is divided into four paths which are respectively an alkaline heating wastewater drainage pipe 7-4; 7-5 parts of a chromium-containing wastewater drainage pipe; 7-6 parts of acid-containing wastewater drainage pipe; alkali-containing wastewater drainage pipes 7-7 are respectively controlled by branch pipes through electromagnetic valves, and are collected to a main pipe to enter a wastewater comprehensive treatment device 7-8 for treatment, and then standard reclaimed water is used for greening or waste residue discharge compression and drying according to regulations.

In one example of the production line of the present invention, as shown in FIG. 7, a zinc melting tank 7-10 for replenishing zinc ions by electrolysis; and 7-12, an anode plate and a cathode hanger are hung on two sides in the galvanizing bath, and the workpiece is connected with the cathode electrode through the hanger and the flying bar combination to complete the galvanizing process.

In an example of the production line of the present invention, as shown in fig. 1, a selection switch for realizing a whole-process preset program by one-key starting of feeding and discharging through console 1-22 can be realized in wired and wireless operation.

In one example of the production line of the present invention, as shown in fig. 2, the work monitoring room has two display screens, one for displaying the work position flow status performed under each process and each electroplating process parameter transmitted by the sensor, such as current, temperature, ph value chemical motor ion composition of each work tank, and parameters of each tank body; and another display screen (comprising a plurality of small screens) can display the real-time scene of the local work of the whole production line, and the system has the function of fault prompting and alarming.

The whole process of the electrogalvanizing technological process of the precise slender cold-drawn seamless steel pipe with certain specification is exemplified according to the production line of the invention. For example, an outer diameter of

The length of the tube is 6 meters, and the process flow of the color galvanization is required to be as follows:

s01: the workpieces to be plated are sent to a workpiece hanging and transferring vehicle 1-20, the workpieces are hung on a hanger on a flying bar combination in a manual-assisted manner, the workpieces are arranged in a double-sided curtain manner,

30 pieces of diameter pipes can be hung on one surface, 60 pieces of diameter pipes can be hung on the two surfaces, a starting button is pressed by a rotary color galvanizing program, and the workpieces enter a lifting hanging position along a track;

s02: lifting hooks 2-25 of the electroplating gantry crane at the lifting and hanging position downwards to lift and connect a flying bar assembly and a lifted workpiece on a transfer trolley, lifting the flying bar assembly and the lifted workpiece to the proper position, then moving the flying bar assembly to the right position, and downwards placing the flying bar assembly and the lifted workpiece into a hot degreasing tank; in the figure, the number of the thermal degreasing tanks is 2, each tank is provided with 2 stations, the total number of the stations is 4, the thermal degreasing process is set to be 32 minutes, and the heating temperature is 70 ℃;

s03: the electroplating gantry crane returns to the left to receive and send the next group of the flying bar combination and the workpiece, releases heat and degreases the second station, then repeatedly receives and sends the third group of the flying bar combination, the fourth group of the flying bar combination and the workpiece combination, a group of 60 seamless steel pipes is the production beat and the productivity of the production line every 8 minutes, and the hot degreasing is carried out for 4 stations;

s04: after the double-lifting suspension gantry crane 2-2 is processed for 32 minutes at a single thermal degreasing station, the crane travels to the right and is hung up and down at the same time, the crane-takeoff combination 2-3 and the cathode hanger 2-5 descend, and the double-lifting suspension gantry crane 2-2 moves the crane-combination 2-3 and the cathode hanger 2-5 to the right and is placed in an ultrasonic degreasing tank for about 1 minute;

s05: lifting and moving the water tank to be placed into a first rinsing bath for a plurality of seconds, then lifting and moving the water tank to be respectively placed into a second spraying rinsing bath 1-31 and a third spraying rinsing bath 1-31, and respectively calculating the working time of the water tank in seconds;

s06: the cleaned workpiece is moved, lifted and hung up and down by a double-lifting hanging gantry crane 2-2 and is placed into a hydrochloric acid pickling tank 1-41 and a sulfuric acid pickling tank 1-42, each tank is provided with 2 stations, the workpiece stays in the two pickling tanks for 16 minutes in sequence, the two pickling processes take 32 minutes in total, and the pickling working temperature is 40 ℃;

s07: the pickled workpiece is lifted and then enters a next water tank, the pickled workpiece is lifted and then enters a high-position water washing tank 1-5, the exchange position is only used for emptying a hanger without putting the workpiece flying bars and washing the flying bars, the other double-lifting suspended gantry crane 2-2 is used for continuously washing a terminal electrolytic tank 1-6 with water to remove impurities, the temperature is controlled at 50 ℃, then the pickled workpiece enters an ultrasonic water washing tank 1-7, then the pickled workpiece enters a water washing program like the procedure S05 again, the pickled workpiece is moved into an activation tank 1-8 to be subjected to surface activation, then the pickled workpiece is moved into a neutralization tank 1-9, and then the pickled workpiece is washed with water again and sprayed with water;

s08: the workpieces which are completely cleaned are combined and put into a galvanizing bath 1-10 by a gantry crane, the cathodes of the workpieces connected on the flying bars are accurately electrically connected with the anode of a system and form current with an anode plate which is arranged in an electroplating bath and is connected with the anode in the medium of electrolyte to finish galvanizing, the production line is provided with three galvanizing baths, each galvanizing bath can be used for holding two groups of workpieces, 6 groups of workpieces can be held totally, the galvanizing working time of each group of workpieces is 32 minutes, the working temperature of alkaline galvanizing is 25 ℃, the electrolytic solution needs to be cooled, and one refrigerator is configured for the purpose;

s09: the workpiece after electro-galvanizing is sequentially combined with the workpiece of the flying bar by a gantry crane to be subjected to water washing and ultrasonic water washing as before, the workpiece enters a light-emitting groove 1-11 after the time is 4 minutes to improve the brightness and uniformity of the surface of the galvanized pipe, and is subjected to water washing again and enters an exchange tank, and then the workpiece is shifted by the gantry crane to be placed into a trivalent passivation groove 1-13, so that the galvanized pipe is white and bright; and (3) placing the workpiece and the flying bar combination into a five-color passivation tank 1-14 by shifting according to a selected process color galvanized gantry crane, wherein the working time of the passivation process is 60 seconds, and the temperature is 50 ℃. And (3) sequentially washing the passivated workpiece again, namely soaking the workpiece in a hot washing tank for 3 seconds at 60 ℃ for 1-17, and then passing through two closed tanks for 1-18 for 30 seconds respectively. The temperature is 60 ℃;

s10: after the workpiece finishes the galvanizing process, the flying bar and the workpiece are combined and moved out of the process tank by a gantry crane, and enter drying boxes 1-19 after space drying, wherein the drying boxes 1-19 have three processes, each drying box 1-19 has two stations, and the drying time and the process beat are less than 32 minutes;

s11: the dried workpiece and the flying bar assembly are transferred to a lifting and descending hanger by a gantry crane, transported out of a closed production line workshop by a transfer trolley, and then unloaded by manual assistance, and the process flow is finished;

s12: workpieces with the same specification and size and the same surface passivation film requirement can be continuously processed according to the sequence from S01 to S11, if products with different specifications and different surface passivation film requirements are produced, only the workpiece lifting appliance and the program need to be replaced to select the variety of the passivation film, and all the process procedures are added and completed on the line; for example, the galvanized pipe has an outer diameter of

The surface passivation film is army green, and only the lifting appliance needs to be matched

The number of the single-side hoisting of the pipe is 20, 40 pieces of double-side hoisting can be hung, the program is selected from military green passivation tanks 1-15, and the whole electrogalvanizing program is completed by starting with a key without changing.

Claims (6)

1. The utility model provides a full self-cleaning production line of accurate slender steel pipe electrogalvanizing which characterized in that includes:

a closed production workshop (2-1);

the process tank which is arranged in the closed production workshop (2-1) according to the process flow and has various functions of realizing the set specification and size of the precise slender steel pipe and the galvanized variety comprises the following functions: the device comprises a hot degreasing tank (1-1), an ultrasonic degreasing tank (1-2), a rinsing tank (1-3), a spray rinsing tank (1-31), a hydrochloric acid pickling tank (1-41), a sulfuric acid pickling tank (1-42), a high-level rinsing tank (1-5), a terminal electrolytic tank (1-6), an ultrasonic activation tank (1-7), a rinsing tank (1-8), a neutralization tank (1-9), a galvanizing tank (1-10), a light-emitting tank (1-11), an ion exchange tank (1-12), a trivalent passivation tank (1-13), a five-color passivation tank (1-14), a military green passivation tank (1-15), a black zinc passivation tank (1-16), a hot rinsing tank (1-17), a closed tank (1-18), a drying box (1-19), The feeding trolley (1-20), the discharging trolley (1-21) and the control console (1-22);

an executing device capable of realizing moving positioning of workpieces hung on the electrodes along a production line according to a set program, lifting, hanging, lifting, lowering and placing the workpieces into each process tank to realize program automatic control is positioned above the process tank bodies continuously arranged in the horizontal direction, and comprises a suspended double-lifting gantry crane (2-2), wherein the double-lifting suspended gantry crane (2-2) consists of a top beam structure (3-3), a side wall structure (3-4), a walking power system (3-1), a double-lifting system (4-1) and a lifting hook (4-3);

wherein, the double-lifting suspended gantry crane (2-2) is used for controlling the positioning of the crane position on the suspended crane guide rail (2-4) through the walking power system (3-1) and is realized by a limiting wheel (2-4);

wherein, the double-lifting suspension gantry crane (2-2) is placed in or lifted out of a certain process groove (2-7) through a lifting flying bar combination (2-3), a workpiece lifting appliance (2-5) and a lifting workpiece (2-6);

the closed production workshop (2-1) and the full-automatic production line are provided with a waste gas collecting and treating system device, which comprises side air collecting rectangular pipes (5-11) arranged at two sides of a process tank (5-1) for intensively generating waste gas, a gas collecting pipeline arrangement (5-2), an acid treatment tower (5-3), an alkaline treatment tower (5-4) and a gas collecting hood (6-2) arranged above the closed production workshop (2-1);

the production line has the feedwater to supply gas and wastewater discharge processing system, and it includes:

a tap water supply system (7-1), a pure water supply system (7-2), an air supply system (7-3), an alkaline heating wastewater drain pipe (7-4), a chromium-containing wastewater drain pipe (7-5), an acid-containing wastewater drain pipe (7-6), an alkali-containing wastewater drain pipe (7-7), a wastewater comprehensive treatment device (7-8), a water supply two-way electromagnetic valve (7-9), a wastewater two-way electromagnetic valve (7-10) and an air inlet electromagnetic valve (7-11);

the production also comprises an electrolytic zinc melting tank (7-10), a production line rectification power supply system (7-12) and a cathode plate hanger (7-13);

the production line is monitored by an operation monitoring display system (2-7).

2. The full-automatic electrogalvanizing production line for precise elongated steel pipes according to claim 1, characterized in that,

the process flow with complete arrangement of all functional process tanks is controlled by a program with a mobile positioning, a walking gantry crane and a double-lifting device (4-1), and the whole process of the electrogalvanizing process can be completed automatically by completing one-key starting according to the set process beat;

the production line is suitable for the galvanizing production process of series of precise slender steel pipes with different specifications and sizes and surface passivation treatment.

3. The full-automatic electrogalvanizing production line for precise elongated steel pipes according to claim 1, further comprising:

draw exhaust air and exhaust-gas treatment system includes: gas collecting pipes (6-1) arranged on both sides of the process tank for intensively generating the waste gas; when the air-conditioner works, the double-lifting suspended gantry crane (2-2) and the flying bus combination (2-3) are provided with the herringbone cover plate, waste gas is guided to enter the groove end branch air pipe (6-3) together, the air collecting cover (6-2) above the closed production workshop (2-1) guides the whole workshop waste gas to enter the ceiling branch air pipe (6-4), then the main air pipe (6-5) is collected, the branch air pipe is provided with the adjusting valve (6-6), and the air exhaust amount of the power of an air induction system and the graded collection adjusting pipeline ensure that the closed workshop (2-1) forms a negative pressure environment.

4. The full-automatic electrogalvanizing production line for precise elongated steel pipes according to claim 1, characterized in that,

the water supply and drainage system with reasonable and full name arrangement is provided with a water supply two-way electromagnetic valve (7-9) and a drainage two-way electromagnetic valve (7-10) for control, an air inflation pipeline is controlled by an air intake electromagnetic valve to enter compressed air to stir water in the process tank, and clear water injected into the parallel multi-stage cleaning tank enters from the last stage and then overflows into the front passage step by step to ensure the cleanness of the water, save the water and reduce the discharge amount;

wherein, the waste water with different components generated by different chemical treatments and electrochemical reactions is respectively discharged into a waste water comprehensive treatment device (7-8) through different pipelines, namely an alkaline warming waste water discharge pipe (7-4), a chromium-containing waste water discharge pipe (7-5), an acid-containing waste water discharge pipe (7-6) and an alkali-containing waste water discharge pipe (7-7) through electromagnetic valves (7-10).

5. The full-automatic electrogalvanizing production line for precise elongated steel pipes according to claim 1, characterized in that,

stainless steel electric heating pipe devices and temperature measuring sensor control systems are arranged in process tanks to be heated of a thermal degreasing tank (1-1), an ultrasonic degreasing tank (1-2), a water washing tank (1-3), a terminal electrolytic tank (1-6), an ultrasonic water washing tank (1-7), a trivalent passivation tank (1-13), a multicolored passivation tank (1-14), a military green passivation tank (1-15), a black zinc passivation tank (1-16), a hot water washing tank (1-17) and a closed tank (1-18); a tubular refrigerator is arranged in the galvanizing bath, and a main refrigerating machine of the tubular refrigerator is arranged outside the closed production workshop (2-1);

wherein, the temperature control is kept constant in a certain range according to the process requirement.

6. The full-automatic electrogalvanizing production line for precise elongated steel pipes according to claim 1, characterized in that,

when the gantry crane is at an electrogalvanizing station, the gantry crane is provided with a double lifting device (4-1), and the hoisted workpiece does reciprocating motion with the amplitude of 120mm under the action of a left-right moving device (4-2) along the length direction of the groove so as to ensure the uniformity of a plating layer.

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