Nickel plating electrolytic cell

Abstract

The present invention relates to the field of electroplating technology, specifically a nickel-plating electrolytic cell, comprising: a cell body, the cell body being fixedly installed horizontally on the ground; a protective device for preventing harmful gases from being released into the air is provided above the cell body, the protective device comprising: a slide rail, two slide rails being laterally provided on the upper side of the cell body, a cover being provided on the two slide rails, a fixed plate being fixedly installed on both sides of the two cover shells, each fixed plate being fixedly installed with two sliders, eight sliders being slidably installed on the slide rails, and two cylinders being vertically and symmetrically installed on the top of the two cover shells. By adding a cover shell and a partition, the present invention reduces the time that the cell mouth of the electrolytic cell is exposed to the air while ensuring that electroplating can be effectively completed, thereby greatly reducing the release of harmful gases volatilized by the heated electrolyte into the air, reducing the harm of harmful gases to the human body, and effectively protecting the life and health of workers.

Description

Technical Field

[0001] The invention relates to the technical field of electroplating, in particular to a nickel plating electrolytic cell. Background Art

[0002] For the existing nickel plating electrolytic cells, although 90% of large-volume manufacturers have adopted automated nickel plating, investigations have found that established electroplating equipment manufacturers such as Dongguan Zhenyuan Environmental Protection Technology Co., Ltd., in addition to providing automated electroplating production lines, still provide production lines such as manual rack nickel-tin plating production lines, manual rack nickel plating production lines, and manual ring rack nickel plating production lines. This shows that manual electroplating still has broad applications and markets for small-batch electroplating manufacturers and manufacturers with a wide variety of electroplated workpieces that are not suitable for mass production.

[0003] Both automated electroplating production lines and manual electroplating production lines use open electrolytic tanks, such as Zhenyuan Technology's bright nickel plating electroplating tank. The electrolyte is added to the electrolytic tank and heated to the required temperature. The electrolyte heating temperature range for nickel plating is between 25°C and 60°C depending on the process steps. When the temperature is reached, the workpiece is placed in the electrolytic tank for electroplating. The difference is that the automated production line uses a machine to place the workpiece into the electrolytic tank for electroplating, and the machine still takes it out after completion, while the manual production line is completely manual. The workpiece is hung in the electrolytic tank and then taken out manually after the electroplating is completed. However, when the electrolyte is heated during nickel plating, the nickel sulfate, nickel chloride and other substances in the electroplating solution in the electrolyte will react and evaporate into the air to form sulfuric acid mist and chloric acid mist. Manual nickel plating can cause varying degrees of damage to the eyes, nose, skin and other parts of the human body. In mild cases, allergies or inflammation may occur, and in severe cases, damage to human organs may occur. Long-term inhalation of low-concentration sulfuric acid mist (1.5mg / m 3 ) can cause nasal mucosal atrophy, chronic bronchitis, and gum erosion. Long-term exposure to high-concentration sulfuric acid mist can cause pulmonary edema and even cancer. Existing nickel-plating electrolytic cells do not address the environmental pollution and health risks of harmful gases released into the air during the nickel plating process.

[0004] To this end, a nickel plating electrolytic cell is proposed, which can reduce the time the electrolyte is exposed to the air by 80%-90% and reduce the emission of acid mist into the air. Summary of the Invention

[0005] The object of the present invention is to provide a nickel plating electrolytic cell, which solves the problems raised in the above-mentioned background technology by adding a protective device and a recovery device.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A nickel plating electrolytic cell comprising:

[0008] A tank body, wherein the tank body is fixedly installed horizontally on the ground;

[0009] A protective device for preventing harmful gases from being released into the air is provided above the pool body. The protective device includes: a slide rail, two slide rails are horizontally provided on the upper side of the pool body, and a cover is provided on the two slide rails. The cover is made of plastic or other corrosion-resistant materials such as carbon fiber or copper oxide. A fixed plate is fixedly installed on both sides of the two cover shells, and each fixed plate is fixedly installed with two sliders. The eight sliders are slidably installed on the slide rails. Two cylinders are vertically symmetrically installed on the top of the two cover shells. A cross bar is horizontally fixed on the output end of the two cylinders in each cover shell. Two motors are horizontally installed on the pool wall on one side of the pool body. The output shafts of the two motors penetrate the side wall of the pool body and gears are fixedly installed on the output shafts. A rack 1 that cooperates with the gear is fixedly installed on one side of the two cover shells, and the rack 1 is located above the gear. The two motors respectively drive the two gears to rotate, and then the two gears drive the two racks to move horizontally, thereby driving the two cover shells to open and close. The guide rail makes the opening and closing of the cover shell more stable. The synchronous belt and synchronous pulley can also be replaced with a combination of gears and chains according to usage.

[0010] In addition to using slide rails for horizontal sliding installation, the cover shell can also be opened and closed by using a rotating shaft connection. The rotating opening and closing cover shell uses a rotating shaft in the middle above the pool body, which is welded to one of the cover shells. Gear teeth are provided in the middle of the rotating shaft, and a gear that cooperates with the rotating shaft teeth is welded on the other cover shell. When the rotating shaft rotates to drive one cover shell to rotate upward and open, the other cover shell will also be driven to rotate upward and open due to the engagement of the gears, and the same is true when closing. Only one rotating shaft can be used in conjunction with the motor, which reduces the use of guide rails and can control the opening and closing of the two cover shells with one motor. The cost reduction effect is achieved by reducing the use of motors and guide rails. At the same time, the upward rotating opening and closing can make full use of the space above the pool body and reduce the use of floor space.

[0011] Preferably, limit blocks are symmetrically provided on both sides of the two slide rails, and the setting of the limit blocks ensures that the slider does not slide off.

[0012] Preferably, the protective device also includes a partition, and two partitions are horizontally and symmetrically installed on the upper side of the pool body for sliding. Rack 2 is fixedly installed on the upper surface of the two partitions. The two racks 2 on the two partitions cooperate with two gears respectively, and the two racks 2 are both below the gears. The gears drive rack 1 and rack 2 to move simultaneously and drive the cover and the partition to move simultaneously, and the gear racks are used to make the cover and the partition move in opposite directions. When one of the cover and the partition is opened, the other is closed to prevent harmful gases from continuously overflowing into the air, increase the cooperation between the partition and the cover, make them move synchronously, and increase the synchronization and reliability of the equipment.

[0013] In addition to adopting horizontal sliding opening and closing, the partition can also be folded. Each partition is changed into two plates that can be rotated and folded, and a rotating shaft is welded and installed at one end of one of the plates. A guide groove is then opened on the side wall of the cell body to ensure the movement trajectory of the partition. Finally, a motor is set at one end of each partition and fixedly connected to the rotating shaft with a coupling. When the motor rotates, it drives the rotating shaft to rotate, and the rotating shaft drives the plate fixedly connected to the rotating shaft to rotate. The fixedly connected plate drives the other plate to rotate to realize the folding and unfolding functions. The folding partition is set at the cell mouth and will not occupy the area other than the installation area of ​​the cell body, which can reduce the floor space of the electrolytic cell.

[0014] Preferably, a recovery device for recovering exhaust gas is also installed on one side of the pool body, and the recovery device includes a fan mounting platform, which is a cubic platform on which the fan can be installed or a structure or device on which the fan can be stably installed, such as a table, a rack, etc. The fan mounting platform is fixedly installed on the ground next to the pool body. The fixed installation here can be fixed with anchor bolts or directly dug a pit in the foundation with cement and poured. The fan is fixedly installed on the fan mounting platform, and the fan can also be replaced by an air pump. An air outlet pipe is opened on the upper side of the pool wall of the pool body, and the air outlet pipe can be made of plastic or carbon fiber. The outlet pipe mouth is higher than the electrolyte liquid level and the air outlet The mouth of the tube is located between the electrolyte liquid level and the space formed by the protective device. The end of the outlet pipe away from the cell body is connected to the air inlet of the fan. The air outlet of the fan is fixedly installed with an outlet pipe, and the outlet pipe is also provided with an electric ball valve. A collecting box is installed at the end of the outlet pipe, and a waste box is provided on one side of the collecting box. The waste box and the collecting box are connected by a drain pipe, and a drain valve is provided on the drain pipe. Filtered liquid is provided inside the collecting box, and the outlet pipe extends into the filtered liquid. A pressure relief valve is fixedly installed on the cell body, and the pressure relief valve is higher than the electrolyte liquid level. An exhaust pipe for removing filtered air is also provided above the collecting box, and an electromagnetic valve is installed on the exhaust pipe.

[0015] The filter liquid in the recovery device is used to collect and absorb the acid mist or waste gas generated by the electrolyte inside the protective device, and useful substances are collected in the filter liquid to prevent them from leaking into the air and causing pollution when the protective device is opened during electroplating of the workpiece. When the filtering effect of the filter liquid is insufficient, the electric ball valve can be temporarily closed, and then the drain valve can be opened to discharge the filter liquid into the waste liquid tank for storage, and then the filter liquid can be replaced, and finally the electric ball valve can be reopened to ensure the filtering effect while storing the substances in the waste gas or acid mist for subsequent recycling.

[0016] Preferably, an air pump is fixedly installed above the collection box, and the air pump is electrically connected to the solenoid valve 1 and the electric ball valve. The drain valve is a one-way valve. When the electric ball valve and the solenoid valve 1 are closed, the electrical signal is fed back to the air pump, and the air pump pressurizes the inside of the collection box, so that the filtered liquid flows from the one-way valve to the waste liquid tank. Compared with an ordinary drain valve, the drainage using the combination of air pressure and one-way valve can replace the filtered liquid more thoroughly.

[0017] Preferably, the collection box is a double-layer plate, and the interlayer between the double-layer plates is in a vacuum-sealed state. The initial temperature of the filtrate inside the collection box is between 10-15°C. By utilizing low-temperature filtrate and adopting a collection box with vacuum insulation, the acid mist is prevented from entering the collection box and then volatilizing again, thereby improving the filtering and collection effects.

[0018] Preferably, the recovery device also includes another set of air outlet pipes, electric ball valves, collection boxes, drain pipes, and drain valves. The drain pipes are also connected to the waste box. The two air outlet pipes are connected to the exhaust holes of the blower with a three-way interface, and the two electric ball valves are electrically connected. Two systems are set up to filter and collect harmful gases, so that when one of the collection boxes is replacing the filtered liquid and the electric ball valve is closed, the electric ball valve of the other collection box is opened to allow the harmful gas to enter and be filtered, ensuring continuous gas filtration and improving the production continuity of the equipment.

[0019] Preferably, the bottom surface inside the collection box is sloped and tilted toward the outlet of the drain pipe; the slope makes it easier to discharge the liquid from the drain pipe.

[0020] Preferably, a gas flow meter for detecting the flow rate or volume of the gas is provided on each of the two outlet pipes, and the two gas flow meters are electrically connected to the electric ball valves on the outlet pipes respectively; the concentration of harmful substances volatilized from the electrolyte is measured according to the different electrolytes, and then the volume and concentration of the filtrate inside the collection box are used to calculate how much harmful substances can be absorbed by the filtrate added each time, so as to calculate the effective filtration time of each batch of filtrate. For example, if the concentration of sulfur dioxide volatilized from the electrolyte is 50 mg / m 3The filtrate is pure water. According to the solubility curve of sulfur dioxide in water, when the initial temperature of the filtrate is 15°C, the solubility of sulfur dioxide in water is 12g / 100ml. Taking into account the heat emitted during the reaction, in order to ensure the stability of the filtration effect, the solubility calculation is taken at a temperature of 30°C. At 30°, 8g of sulfur dioxide can be dissolved in every 100mml of water. If the filtrate is 2L, 160g of sulfur dioxide can be absorbed. If the concentration of sulfur dioxide in the volatile gas remains unchanged, 3200m3 of sulfur dioxide can be stably absorbed. 3 Sulfur dioxide in the air, because there is also chlorine or other substances in the volatile substances, for the sake of insurance, multiply it by a safety factor of 0.5 to get 1600m 3 The volume of air is calculated based on the gas flow rate and the diameter of the pipe. 3 The time required for the harmful gas to enter the collection box is the time for the filter liquid to be replaced. The gas flow meter then feeds back to the electric ball valve to close the electric ball valve and then manually replace the filter liquid.

[0021] Preferably, both of the collection boxes are opened on the upper side with a water inlet pipe, both of the water inlet pipes are at the same height as the exhaust pipe, both of the water inlet pipes are connected to the external filtered liquid, and both of the water inlet pipes are installed with a solenoid valve 2, and the two solenoid valves 2 are respectively electrically connected to the electric ball valve of the outlet pipe.

[0022] Preferably, the cover shell includes a fixed shell and a movable shell, the four fixed plates are respectively installed on the left and right sides of the two fixed shells, the four cylinders are also respectively installed on the two fixed shells, and the movable shells are rotatably installed on the fixed shells by two hinges and cooperate with the fixed shells. The cover shell is divided into a fixed shell and a movable shell, so that the movable shell can be lifted up, making it convenient for workers to hang the workpiece on the cross bar.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. Compared with the existing electrolytic cells, the nickel-plating electrolytic cell described in the present invention has an additional cover and a partition, and utilizes the mutual cooperation of the gear and rack 1 and rack 2 to enable the cover and the partition to achieve opposite movements. When the cover is opened to place the workpiece, the partition is closed to prevent harmful gases from leaking into the air. When the workpiece is placed for electroplating, the cover is closed and the partition is opened so that the partition does not hinder the electroplating of the workpiece. While ensuring that the electroplating can be completed, the time that the electrolytic cell mouth is exposed to the air is reduced, and the release of harmful gases volatilized by the heated electrolyte into the air is greatly reduced, reducing the damage of harmful gases to the human body, and effectively protecting the life and health of workers.

[0025] 2. In the nickel-plated electrolytic cell described in the present invention, the partition in the second embodiment adopts a folding installation method, and the two cover shells adopt a rotating opening and closing method, which effectively utilizes the space above the electrolytic cell and saves the area required for the installation of the electrolytic cell. Through the cooperation between the synchronous pulley, the synchronous belt and the gear, the output end of the motor is connected to the rotating shaft with a coupling, so that one rotating shaft can simultaneously drive the movement of the two cover shells and the two partitions, reducing the number of motors used and saving costs while maintaining the protection effect.

[0026] 3. The nickel-plated electrolytic cell described in the present invention has an additional recovery device for collecting harmful gases. By allowing the harmful gases to pass through the filtrate and then releasing them into the air, the harmful gases are purified, and at the same time, the recyclable electrolyte substances are retained in the filtrate, thereby greatly avoiding the harm of harmful gases to the human body and nature. It is also provided with a device to detect the service life of the filtrate by detecting the volume of the liquid entering the collection box, so that the filtrate can be replaced in time to ensure the filtering effect. At the same time, two collection boxes are provided for interchangeable use. When one collection box is replacing the filtrate, the other collection box can perform filtering work to ensure the continuity of production. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a three-dimensional schematic diagram of the electroplating state of the present invention;

[0028] Figure 2 It is a three-dimensional schematic diagram of the electroplating working state 1 of the present invention;

[0029] Figure 3 It is a three-dimensional schematic diagram of the electroplating working state 2 of the present invention;

[0030] Figure 4 A schematic diagram of the internal structure of the present invention in an electroplating state;

[0031] Figure 5 It is a right side view of the electroplating state of the present invention;

[0032] Figure 6 For the present invention Figure 4 Partial view A in

[0033] Figure 7 It is a three-dimensional schematic diagram of the collection box and its connecting pipes of the present invention;

[0034] Figure 8 This is a schematic diagram of the internal structure of the collection box of the present invention;

[0035] Figure 9 This is a three-dimensional schematic diagram of Example 2 of the present invention;

[0036] Figure 10 This is a schematic diagram of the partition installation structure of Example 2 of the present invention.

[0037] In the figure: 1. Pool body; 2. Slide rail; 3. Cover; 301. Fixed shell; 302. Moving shell; 4. Fixed plate; 5. Slider; 6. Cylinder; 7. Cross bar; 8. Partition; 9. Motor; 10. Gear; 11. Rack 1; 12. Rack 2; 13. Fan mounting platform; 14. Fan 14; 15. Air outlet pipe; 16. Air outlet pipe; 17. Collection box; 18. Pressure relief valve; 19. Exhaust pipe; 20. Drain pipe; 21. Solenoid valve 1; 22. Gas flow meter; 23. Electric ball valve; 24. Drain valve; 25. Filtrate; 26. Water inlet pipe; 27. Solenoid valve 2; 28. Waste box; 29. ​​Hinge. DETAILED DESCRIPTION

[0038] Example 1:

[0039] The material of the plated part is Q235A, and the electrolyte composition is: mainly nickel sulfate 240g / L, nickel chloride 40g / L, auxiliary brightener BNB-95A 10ml / L, brightener BNB-95B 0.7ml / L; the pH value is 4.4, the electroplating temperature is 55℃, the plated part size is a steel shaft with a diameter of 100mm and a length of 800mm, and the coating thickness is 10μm. According to the electroplating formula:

[0040]

[0041] And refer to the quick calculation table of electroplating time, when D k =1.3A / mm 2 It takes about 30 minutes to nickel-plate 10μm. Based on a 12-hour daily working schedule and a daily output of 350-400 pieces, 16 steel shafts need to be electroplated simultaneously in each batch.

[0042] Reference 1 to Figure 6The body 1 of the electroplating pool is 2m long, 1m wide and 1m high. The length, width and height are the internal dimensions of the pool body 1. A guide rail is installed on both sides of the pool body 1. The guide rail is an SHS model linear guide rail. The guide rail is four meters long and is installed symmetrically with bolts about the center of the pool body 1. Each guide rail is equipped with four matching sliders 5 and the sliders 5 are slidably installed on the guide rails. The left and right ends of the guide rails are also fixed with limit blocks for preventing the sliders 5 from leaving the slide rails 2. The sliders 5 are divided into two pairs from left to right, and each pair of sliders 5 is fixed with a fixing plate 4 with bolts. The fixing plate 4 is an ABS plastic plate. The two corresponding fixing plates 4 on the two guide rails are fixed There is a cover shell 3, which is divided into a fixed shell 301 and a movable shell 302. The fixed shell 301 is fixedly connected to the fixed plate 4, and the movable shell 302 is rotatably mounted on the fixed shell 301 with a hinge. It can move horizontally with the fixed shell 301 and can be flipped upward. The bottom of the cover shell 3 fits the contour of the upper surface of the pool body 1. Two cylinders 6 of model TN16*200 are vertically fixed on the left and right sides of the top of each cover shell 3 with bolts. A cylindrical crossbar 7 is threaded between the cylinders 6 inside each cover shell 3. The cover shell 3 is made of transparent FEP material. The cover shell 3 is 1m long, 1m wide and 350m high. In order to improve its strength, the thickness of the cover shell 3 needs to reach 30mm. 3 is connected to the fixed plate 4 by bolts, and a rack 11 is also fixedly installed on one side of the two cover shells 3 with bolts. Two stepper motors 9 are horizontally installed on the left and right sides of one side of the pool body 1. The stepper motor 9 is fixedly installed on the pool wall with bolts. The rotating shafts of the two stepper motors 9 are extended into the interior of the pool body 1 and a gear 10 is installed on the output shafts of the two stepper motors 9 with a key connection. The rotating shaft of the stepper motor 9 is located below the rack installed on the cover shell 3. The two gears 10 are respectively engaged with the two racks 11. Openings for installing partitions 8 are provided on the left and right sides of the pool body 1. The openings are located below the gear 10. The two partitions 8 are respectively slidably installed on On the left and right sides of the cell body 1, the partitions 8 are made of transparent FEP material with a length of 1m, a width of 1m and a thickness of 15mm. The gap between the two partitions 8 and the opening does not exceed 1mm. The two partitions 8 are installed with limit blocks on the side away from the cell body 1. Racks 2 12 are fixedly installed on one side of the upper surface of the two partitions 8. The two racks 2 12 are located below the two gears 10 and are respectively engaged with the two gears 10. To ensure sufficient strength and corrosion resistance, the gear 10, rack 1 11 and rack 2 12 are all made of 09CuPCrNi-A and tempered with HBS230-250. The cover 3 and the partition 8 are made of transparent FEP material so that people can understand the electroplating situation.

[0043] Reference 1. Figure 7 、 Figure 8One side of the cell body 1 is also provided with a fan mounting platform 13, a fan 14, an air outlet pipe 15, two air outlet pipes 16, two collecting boxes 17, a pressure relief valve 18, two exhaust pipes 19, two drain pipes 20, two solenoid valves 1 21, two gas flow meters 22, two electric ball valves 23, two drain valves 24, two water inlet pipes 26, two solenoid valves 2 27, a waste box 28, and a hinge 29. Each collecting box 17 is provided with a filtrate 25, and the filtrate 25 is pure water. The fan mounting platform 13 is fixedly installed on the ground on one side of the electrolytic cell body 1. A collecting box 17 is installed on the ground between the fan mounting platform 13 and the cell body 1. A fan 14 of model FX-1 is horizontally mounted on the fan mounting platform 13 with bolts. The air inlet of the fan 14 is connected to the cell body 1 with an air outlet pipe 15. To facilitate disassembly and replacement, the air outlet pipe 15 is threadedly connected to the cell body 1 and the fan 14. One end of the air outlet pipe 15 connected to the cell body 1 is located above the electrolyte level. The end of the air outlet pipe 15 close to the cell body 1 is an inverted U-shape to prevent the electrolyte from entering the fan 14. The two air outlet pipes 16 are connected to the air outlet of the fan 14 and the two air outlet pipes 16 with a three-way joint. The collecting box 17, the two air outlet pipes 16 and the air outlet of the fan 14 and the collecting box 17 are all threadedly connected, and the two air outlet pipes 16 are installed with electric ball valves 23, which are electrically connected with wires, and the initial state of the two electric ball valves 23 is one open and one closed. The ends of the air outlet pipes 16 connected to the collecting box 17 are extended into the collecting box 17 and into the filtrate 25. Drain pipes 20 are provided between the two collecting boxes 17 and the waste box 28. The two drain pipes 20 are both located on the lower side of the collecting box 17, and a drain valve 24 is also installed on the drain pipes 20. The pool body 1 is also equipped with a pressure relief valve 18 to prevent the internal air pressure of the pool body 1 from being too high and causing a safety accident. The two collection boxes 17 are respectively threadedly connected to the exhaust pipe 19 and the water inlet pipe 26 on the left and right sides. Among them, the two water inlet pipes 26 are connected to the external filtered liquid 25 storage device. The two water inlet pipes 26 are also equipped with a solenoid valve 27, and the two exhaust pipes 19 are equipped with a solenoid valve 1 21. The two outlet pipes 16 are each provided with a vortex type gas flow meter 22, and each gas flow meter 22 is electrically connected to the electric ball valve 23 on the outlet pipe 16 where it is located.

[0044] The specific workflow is as follows:

[0045] Before work: The electrolytic cell is in a state where the partition 8 is closed and the cover 3 is horizontally opened. The worker wears gloves, masks, protective glasses, and work clothes, and checks whether there are any leaks in the connections of each pipe. If all conditions are normal, the machine can be turned on to heat the electrolyte and turn on the fan 14. Then, the concentration of harmful substances is measured at the outlet of the air pipe 15 to prepare for setting the regular replacement of the filtered liquid 25.

[0046] During work: workers lift up the movable shells 302 of the cover shells 3 on both sides to expose the cross bar 7 inside the cover shell 3. Workers hang the steel shafts to be electroplated on the cross bars 7 on both sides with hooks, and then rotate the movable shell 302 downward to close it. The two motors 9 start, and the rotation direction is toward the center of the cell body 1, and drives the two gears 10 to rotate and drives the two racks 11 on the two cover shells 3 to move parallel, and finally controls the two cover shells 3 to merge toward the middle of the cell body 1. At the same time, the gear 10 also drives the rack 2 12 on the two partitions 8 to move parallel to the outside of the cell body 1, and finally drives the partition 8 to open outward. When the two cover shells 3 are merged, the two partitions 8 are also opened outward to the limit position, and then the two motors 9 stop rotating. At the same time, the four cylinders 6 inside the two cover shells 3 extend downward at the same time, and drive the cross bar 7 and the steel shaft workpiece hanging on the cross bar 7 to extend downward into the electrolytic cell for nickel plating.

[0047] At the same time, the fan 14 is also constantly performing the exhaust work. The fan 14 extracts the harmful gases such as sulfuric acid mist, chloric acid mist, etc. inside the pool body 1 through the outlet pipe 15 connected to the fan 14 and enters the outlet pipe 16 through the open electric ball valve 23 and then sends the harmful gases into the collection box 17. Since the end of the outlet pipe 16 extends into the water, the water inside the collection box 17 will cool, absorb and dilute the acid mist, and the gas passes through the water and is discharged upward from the exhaust pipe 19 to achieve filtering of the harmful gases. At the same time, the initial temperature of the filtrate 25 is set to 10-15°C to reduce the re-volatilization of harmful substances, so the sulfur in the collection box 17 is Acids and the like will no longer evaporate easily into the air. When the gas flow meter 22 detects that the volume of gas entering the collection box 17 is about to reach the effective filtration value of the filtrate 25, it controls the electric ball valve 23 connected to the collection box 17 to close and opens another electric ball valve 23 to introduce the gas into another collection box 17 for filtration. Subsequently, the drain valve 24 connected to the closed collection box 17 is opened to discharge the filtrate 25 into the waste box 28. After discharge, the drain valve 24 is closed, and then the solenoid valve 27 connected to the water inlet pipe 26 is opened to inject a certain amount of filtrate 25 into the collection box 17 and then close to prepare for the next switching of the collection box 17 for filtration.

[0048] After the electroplating of a batch of workpieces is completed, the four cylinders 6 in the cover 3 drive the two cross bars 7 to be retracted upward, and the cross bars 7 also drive the workpieces to move upward. After the four cylinders 6 drive the workpieces to be retracted to the highest height, the workpieces remain suspended in the current state for one minute to allow the electrolyte attached to the workpieces to drip back into the cell body 1 as much as possible, and then the two motors 9 reverse to control the two gears 10 to drive the two racks 11 and the cover 3 to open outward, and also drive the rack 2 12 and the partition 8 to merge inward. When the partition 8 is completely merged, the motor 9 stops rotating, and the worker lifts the two movable shells 302 upward to remove the workpieces and hang the workpieces to be electroplated on the cross bars 7 again, and repeats the above steps.

[0049] Example 2:

[0050] like Figure 9 、 Figure 10 As shown, another embodiment is used to install the electrolytic cell. When the output requirement is to electroplate 150-200 steel shafts with a diameter of 100mm and a length of 800mm within 12 hours, the cell body 1 is fixedly installed horizontally on the ground with a size of 2m long, 1m wide and 1m high. Compared with the technical solution 1, two cover shells 3 are provided on the upper side of the cell body 1. The length and width of the two cover shells 3 are both 1m, and the height of the cover shell 3 is 0.5m. Sealing rings are installed at the bottom of the cover shell 3 and the pool mouth of the cell body 1. One end of a cover 3 is fixed A rotating shaft 1 is installed, and gear teeth are provided on the rotating shaft 1. A gear 5 that meshes with the rotating shaft teeth is fixedly installed on another cover shell 3. The rotating shaft 1 is located above the middle of the pool body 1. The rotating shaft 1 is rotatably installed between the two fixed plates 4 with a cylindrical roller bearing. The two fixed plates 4 are respectively welded to the two sides of the pool body 1. The two covers can be opened by rotating the rotating shaft 1 upward. Compared with the way that the gear 10 and the rack drive the cover shell 3 to open and close, the way of connecting the cover shell 3 with the rotating shaft 1 is simpler and more convenient, and the cost is lower than that of the slide rail 2.

[0051] The two ends of the two rotating shafts are rotatably mounted on the pool wall of the pool body 1, and two partitions 8 of the same size are fixedly mounted on the two rotating shafts. The two partitions 8 are hinged, and the ends of the partitions 8 away from the rotating shaft 2 are rotatably mounted on one side of the side wall of the pool body 1. Guide wheels are provided on both sides of the pool body 1 with guide grooves that cooperate with the guide wheels. The guide wheels can roll along the guide grooves in the guide grooves. A synchronous pulley is fixedly mounted on one end of the rotating shaft 1 and one of the rotating shafts 2 extending out of the pool body 1. The two synchronous pulleys are connected by a synchronous belt. A gear three is fixedly mounted on the end of the other rotating shaft extending out of the pool body 1, and the gear three is meshed with a gear four installed on the pool body. A synchronous pulley two is also mounted on the rotating shaft of the gear four, and the synchronous pulley two is also connected to the synchronous pulley on the rotating shaft one with a synchronous belt.

[0052] By cooperating with the synchronous belt and the gear, the number of motors 9 connected to the rotating shaft 2 can be reduced, saving costs. By cooperating with one of the rotating shafts 2 and installing the two gears, the rotation directions of the two rotating shafts 2 can be opposite, so that the two opposite partitions 8 can be folded to open the pool mouth at the same time and can be unfolded to close the pool mouth at the same time. Connecting with a synchronous belt can also increase the synchronization of the cover 3 and the partition 8. When the motor 9 controls the cover 3 to rotate upward to open, the synchronous belt drives the synchronous pulley fixedly connected to the rotating shaft 2, and the partition 8 rotates and pushes the guide wheel forward, so that the partition 8 is unfolded to close the pool mouth of the electrolytic cell. When the motor 9 controls the cover 3 to rotate downward to close, the partition 8 will shrink and fold at the same time, so that when the installation space of the electrolytic cell is too narrow to realize the opening and closing of the partition 8 with the gear 10 rack, space can be saved, which is suitable for small-batch production.

[0053] In the recovery device, the filtrate 25 inside the collection box 17 is replaced with NaOH.

[0054] Functions and implementation processes not described in this embodiment are the same as those in the first embodiment, so they will not be described in detail.

[0055] Example 3:

[0056] The cell body 1 is 2m long, 1m wide and 1m high. Different from the second embodiment, six 7-8T50R-471E model universal wheels are evenly fixed on the bottom of the cell body 1 with bolts, and the universal wheels are equipped with brakes and direction locks. The fan 14 is vertically fixed on the side wall of one side of the cell body 1 with bolts, and the collection box 17 and the collection bucket are also fixed on the side wall of the cell body 1 with bolts. A handle is also fixed on one side of the cell body 1 with bolts to facilitate pulling the cell body 1, so that the electrolytic cell can be pulled to other places at will for position replacement.

[0057] The functions and implementation processes not described in Example 3 are the same as those in Example 2 and will not be described in detail here.

[0058] As shown in the table below, the present invention has a great improvement in preventing acid mist such as sulfuric acid and nitric acid from being emitted into the workshop air compared to the existing open nickel plating electrolytic cell. By monitoring the air around the electrolytic cell with acid mist monitoring equipment, the acid mist of the electrolytic cell of the present invention is reduced by 50%-80% compared with the open electrolytic cell, which is far lower than the national "Electroplating Pollutant Emission Standard" (GB21900-2008) that the concentration of hydrogen chloride emissions in the workshop or production facility discharge barrel is far lower than 30 mg / m2, the concentration of sulfuric acid mist emissions is lower than 30 mg / m2, and the sulfuric acid concentration in the vast majority of production workshop standards is not higher than 2 mg / m 3 standards.

[0059]

Claims

1. A nickel plating electrolytic cell comprising: A tank body (1), wherein the tank body (1) is fixedly installed horizontally on the ground; The invention is characterized in that a protective device for preventing harmful gases from being released into the air is provided above the pool body (1), and the protective device comprises: a slide rail (2), two slide rails (2) are laterally provided on the upper side of the pool body (1), a cover shell (3) is provided on the two slide rails (2), and a fixing plate (4) is fixedly installed on both sides of the two cover shells (3), and each of the fixing plates (4) is fixedly installed with two sliders (5), and the eight sliders (5) are slidably installed on the slide rails (2), and the top of the two cover shells (3) is fixed with a fixing plate (4). Two cylinders (6) are vertically symmetrically installed, and a crossbar (7) is horizontally fixedly installed on the output ends of the two cylinders (6) in each of the housings (3). Two motors (9) are horizontally installed on the pool wall on one side of the pool body (1). The output shafts of the two motors (9) penetrate the side wall of the pool body (1) and a gear (10) is fixedly installed on the output shaft. A rack (11) that cooperates with the gear (10) is fixedly installed on one side of the two housings (3), and the rack (11) is located above the gear (10); The protective device also includes a partition (8), and two partitions (8) are horizontally and symmetrically slidably installed on the upper side of the pool body (1), and a rack (12) is fixedly installed on the upper surface of the two partitions (8). The two racks (12) on the two partitions (8) respectively cooperate with the two gears (10), and the two racks (12) are both located below the gears (10).

2. A nickel plating electrolytic cell according to claim 1, characterized in that: A recovery device for waste gas recovery is also installed on one side of the cell body 1, and the recovery device includes a fan mounting platform (13), the fan mounting platform (13) is fixedly installed on the ground next to the cell body (1), and a fan (14) for exhausting air is fixedly installed on the fan mounting platform (13). An air outlet pipe (15) is provided on the upper side of the pool wall of the cell body (1), the outlet of the air outlet pipe (15) is higher than the electrolyte liquid level and the outlet of the air outlet pipe (15) is located between the electrolyte liquid level and the space formed by the protective device, and the end of the air outlet pipe (15) away from the cell body (1) is connected to the air inlet of the fan (14). An air outlet of the fan (14) is fixedly mounted with an air outlet pipe (16), and an electric ball valve (23) is also provided on the air outlet pipe (16). A collecting box (17) is fixedly mounted at the end of the air outlet pipe (16), and a waste box (28) is provided on one side of the collecting box (17). The waste box (28) and the collecting box (17) are connected by a drain pipe (20), and a drain valve (24) is provided on the drain pipe (20). The drain valve (24) is electrically connected to the electric ball valve (23). A pressure relief valve (18) is fixedly mounted on the cell body (1), and the pressure relief valve (18) is higher than the electrolyte level.

3. A nickel plating electrolytic cell according to claim 2, characterized in that: The recovery device further comprises another set of air outlet pipes (16), an electric ball valve (23), a collection box (17), a drain pipe (20), and a drain valve (24). The drain pipe (20) is also connected to the waste box (28). The two air outlet pipes (16) are connected to the exhaust hole of the fan (14) via a three-way interface.

4. A nickel plating electrolytic cell according to claim 2, characterized in that: The two collecting boxes (17) are both provided with filtered liquid (25), the ends of the two air outlet pipes (16) extend into the two collecting boxes (17) respectively and are immersed in the filtered liquid (25), the upper sides of the two collecting boxes (17) are both provided with exhaust pipes (19), and the two exhaust pipes (19) are both installed with electromagnetic valves (21).

5. A nickel plating electrolytic cell according to claim 4, characterized in that: The bottom surfaces inside the two collecting boxes (17) are both sloped and inclined toward the outlet of the drainage pipe (20).

6. A nickel plating electrolytic cell according to claim 5, characterized in that: The upper openings of the two collecting boxes (17) are both equipped with water inlet pipes (26), the two water inlet pipes (26) are at the same height as the exhaust pipe (19), the two water inlet pipes (26) are both connected to the external filtered liquid (25), and the two solenoid valves (27) are both installed on the two water inlet pipes (26), and the two solenoid valves (27) are respectively electrically connected to the electric ball valves (23) of the exhaust pipes (16) where they are located.

7. A nickel plating electrolytic cell according to claim 6, characterized in that: The two gas outlet pipes (16) are both provided with a gas flow meter (22) for detecting the flow rate or volume of the gas, and the two gas flow meters (22) are electrically connected to the electric ball valves (23) on the gas outlet pipes (16) respectively.

8. A nickel plating electrolytic cell according to claim 7, characterized in that: The two electric ball valves (23) are also electrically connected, and the initial states of the two electric ball valves (23) are one open and the other closed.

9. The nickel plating electrolytic cell according to claim 1, wherein: The cover shell (3) includes a fixed shell (301) and a movable shell (302). The four fixed plates (4) are respectively mounted on the left and right sides of the two fixed shells (301). The four cylinders (6) are also respectively mounted on the two fixed shells (301). The movable shells (302) are rotatably mounted on the fixed shells (301) by two hinges (29) and cooperate with the fixed shells (301).

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