A pickling box for jewelry production

Abstract

This utility model relates to the field of jewelry manufacturing technology, specifically disclosing a pickling tank for jewelry production. The tank includes a body with a loading basket suspended from a lifting device via a conveyor belt. An inlet / outlet is located on the top cover of the tank, with a sealing cap at each inlet / outlet. The conveyor belt can move up and down when the sealing cap closes the inlet / outlet. A rotating platform is located at the bottom of the tank, housing an acid tank, an electric heating furnace, and a water tank. The electric heating furnace has electric heating sources on its side walls and bottom. Rotating the rotating platform positions the acid tank or water tank directly below the loading basket. An exhaust system is connected to the tank. A temperature sensor is mounted on the electric heating furnace, and the electric heating sources are connected to a controller, which in turn is connected to the temperature sensor. The electric heating furnace heats the acid tank from the side and bottom, increasing the heating area and improving thermal efficiency. During pickling and washing, the tank is sealed, and the exhaust system extracts the acidic gases, reducing their diffusion.

Description

Technical Field

[0001] This utility model relates to the field of jewelry manufacturing technology, specifically to an acid boiling box for jewelry production. Background Technology

[0002] The main purpose of acid boiling (or pickling) in gold jewelry manufacturing is to remove impurities and improve surface smoothness. It's used in jewelry production and the recycling of old jewelry. During acid boiling, the oxide layers formed during gold processing, such as copper oxide and silver oxide, are dissolved, restoring the gold's original color. Acid boiling also dissolves and removes impurities like silver, copper, and zinc, increasing the jewelry's purity. After boiling, the jewelry is rinsed with clean water. Nitric acid, hydrochloric acid, and aqua regia are commonly used in this process. Current acid boiling equipment primarily uses natural gas as a heat source. The acid tank is heated on a gas stove, and the jewelry is immersed in the acid once the boiling temperature is reached. After boiling, the jewelry is removed. The disadvantages of using natural gas as a heat source are: high heating costs; the gas stove can only heat the bottom of the acid tank, resulting in a small heating area, low thermal efficiency, and increased heating time; and difficulty in controlling the heating temperature. Furthermore, acidic gases are released during the boiling process, which can easily diffuse, polluting the surrounding air and potentially affecting worker health. Utility Model Content

[0003] This invention addresses the problems of high cost, low thermal efficiency, and diffusion of acidic gases generated during the acid boiling of gold jewelry using natural gas as a heat source. It provides an acid boiling chamber for jewelry production that uses electric heating as a heat source and performs acid boiling in a sealed environment.

[0004] To solve the above-mentioned technical problems, this utility model includes a support frame, characterized by the following structural features: the support frame has a hollow box with a lid at the top; a loading basket for loading jewelry is mounted on the box; the loading basket is suspended from a lifting device by a conveyor belt; the lid at the top of the box has an inlet / outlet for the loading basket to enter and exit the box; a sealing cover is provided at the inlet / outlet to close the inlet / outlet; when the sealing cover closes the inlet / outlet, the conveyor belt can move up and down; a rotating platform is provided at the bottom of the box, and an acid tank and an electric heater for heating the acid tank are mounted on the rotating platform. The furnace and water tank are included. The top of the acid tank is open, and the top of the electric heating furnace is open and hollow inside. The acid tank is placed inside the electric heating furnace. Electric heating sources are respectively provided on the side walls and bottom of the electric heating furnace. The rotating table is rotated so that the acid tank or water tank is directly below the loading basket. The box is connected to a gas extraction device that can extract acidic gas from the box. The electric heating furnace is equipped with a temperature sensor for detecting the temperature inside the furnace. The electric heating source is controlled and connected to a controller that can control the heating power of the electric heating source. The controller is connected to the temperature sensor signal.

[0005] With the above structure, when acid-boiling jewelry, first place the jewelry to be treated into the loading basket, open the sealing cover of the inlet and outlet, rotate the rotating table so that the acid tank is directly below the loading basket, and use the lifting device to lower the loading basket through the inlet and outlet into the box and suspend it above the acid tank. Close the sealing cover to seal the inlet and outlet. The electric heating furnace heats the acid tank. The working principle of the electric heating furnace is as follows: the electric heating furnace first heats the acid to the boiling temperature at high power, and then switches to low power for heat preservation. The electric heating furnace is not turned off during the operation time. It switches between high and low power according to the temperature detected by the temperature sensor. When the temperature is lower than the boiling temperature, it heats at high power until the temperature is reached. After the initial temperature is reached, low-power heat preservation is used to keep the acid solution within the acid boiling temperature range. Simultaneously, the exhaust equipment is turned on, and the lifting device lowers the loading basket into the acid solution tank to begin the acid boiling treatment of the jewelry in the loading basket. After the acid boiling is completed, the electric heating furnace is turned off, and the loading basket is lifted using the lifting device. When the loading basket is above the acid solution tank, it is suspended. The rotating table is rotated to position the water tank directly below the loading basket, and the lifting device lowers the loading basket down into the water tank to soak and wash away the acid solution on the jewelry. After the water washing is completed, the loading basket is lifted out of the water tank using the lifting device. After the exhaust equipment continues to evacuate the acid gas inside the chamber for a period of time, the sealing cover is opened, and the loading basket is lifted out of the chamber using the lifting device. This invention's acid-boiling tank uses electricity to heat the acid solution, which is cheaper than natural gas. The electric heater heats the acid tank from the bottom and sides simultaneously, increasing the heating area. Compared to a gas stove that heats from the bottom, the electric heater heats up faster and is more efficient, resulting in a faster temperature rise in the acid solution and saving time. The tank is sealed during acid boiling and washing of jewelry, and an extraction device is used to remove acidic gases from the tank to prevent them from spreading outwards. The acid tank and water pool are placed on a rotating platform, and the rotation of the platform and the lifting device enable acid boiling and washing processes without opening the inlet or outlet, further preventing the spread of acidic gases.

[0006] The electric heating source is a carbon fiber quartz heating tube.

[0007] The top of the acid tank is higher than the top of the electric heating furnace; the top opening of the electric heating furnace is provided with an acid-resistant heat-insulating protective plate that is fitted over the outside of the acid tank to reduce heat loss from the furnace; the outside of the acid tank is tightly fitted with an acid-proof sealing ring to prevent acid from entering the electric heating furnace; the acid-proof sealing ring is located above the acid-resistant heat-insulating protective plate.

[0008] The temperature sensor is located at the bottom of the electric heating furnace; the bottom of the electric heating furnace is provided with a through-type pad, the acid tank is placed on the pad, and the side wall of the pad is provided with multiple notches.

[0009] A condenser for cooling acidic gases is provided between the housing and the extraction equipment. The condenser contains a spiral condenser tube arranged from bottom to top. The housing is connected to the lower part of the spiral condenser tube, and the top of the spiral condenser tube is connected to the extraction equipment.

[0010] The lower part of the condenser is provided with an acid gas discharge pipe connected to the housing, and the acid gas discharge pipe is inclined downward and connected to the lower part of the spiral condenser tube.

[0011] The bottom of the spiral condenser is connected to a drain port for discharging the condensed acid.

[0012] The upper surface of the box is provided with a sealing strip around the inlet and outlet. The sealing cover includes two sliding covers located above the inlet and outlet and capable of sliding. The lower surface of the sliding covers is in contact with the sealing strip. When the two sliding covers slide together or move away from each other, the inlet and outlet are closed or opened. An elastic pad is provided at the joint of the two sliding covers. When the sealing cover closes the inlet and outlet, the line is clamped between the elastic pads at the joint of the sliding covers.

[0013] This utility model's acid-boiling box has a rotating platform at the bottom, on which an acid tank, an electric heater, and a water pool are placed. The electric heater heats the acid tank. The top of the acid-boiling box has a sealing and opening inlet / outlet. A lifting device hoists a basket containing jewelry into and out of the box through the inlet / outlet at the top. The rotation of the rotating platform positions the water pool or acid tank directly below the basket. When the acid tank is directly below the basket, acid boiling is performed; when the water pool is directly below the basket, water washing is performed. The electric heater uses carbon fiber quartz heating tubes as the heat source, heating the acid tank simultaneously from the bottom and sides, increasing the heating area and improving heating efficiency. Compared to gas stove heating, using an electric heater shortens the acid boiling time and reduces heat source costs. The acid-resistant heat-insulating protective plate... The design reduces heat loss from the furnace, providing some insulation. An acid-resistant sealing ring prevents acid from boiling out and flowing into the furnace during the acid boiling process. The bottom pads of the electric heating furnace feature a through-type structure, allowing the heat generated by the carbon fiber quartz heating tubes at the bottom to directly act on the bottom of the acid tank, reducing obstruction to heat transfer. The notches in the pads ensure that the temperature at the bottom and sides of the furnace remains as consistent as possible, making the temperature sensor's readings more accurate. The inlet and outlet ports are sealed during acid boiling and washing to reduce the diffusion of acidic gases. The acid boiling tank is also connected to an extraction system, which removes acidic gases from the tank. A condenser is installed between the extraction system and the acid boiling tank; as the acidic gases pass through the condenser, some of the volatilized acid mist is condensed into liquid and collected, reducing the emission of acidic gases. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the acid-boiling box of this utility model;

[0015] Figure 2 for Figure 1 View from direction A;

[0016] Figure 3 for Figure 1 BB cross-sectional diagram;

[0017] Figure 4 This is a schematic diagram of the structure of an electric heating furnace;

[0018] Figure 5 for Figure 4 The C-direction view;

[0019] Figure 6 for Figure 4 DD cross-sectional schematic diagram;

[0020] Figure 7 for Figure 4 EE cross-sectional schematic diagram;

[0021] Figure 8 for Figure 4 A schematic diagram of the FF cross-section;

[0022] Figure 9 (a) is a plan view of the sliding cover at the inlet / outlet of the box when it is open. Figure 9 (b) is a plan view of the sliding cover when closed;

[0023] Figure 10 (a) is Figure 9 (a) is a schematic diagram of the GG cross-section. Figure 10 (b) is Figure 9 (a) Schematic diagram of the HH cross section;

[0024] Figure 11 This is a schematic diagram of the condenser structure;

[0025] Figure 12 This is a schematic diagram of the jewelry before acid boiling. The loading basket is located above the inlet and outlet, and the sliding cover is open.

[0026] Figure 13 This is a diagram illustrating the acid boiling process for jewelry. The loading basket is placed in the acid bath, and the sliding cover is closed.

[0027] Figure 14 This is a diagram illustrating the process of washing jewelry after acid boiling. The loading basket is placed in the water tank and the sliding cover is closed.

[0028] Figure 15 This is a diagram showing the jewelry after the acid boiling process. The loading basket is raised above the inlet and outlet, and the sliding cover is opened.

[0029] In the diagram: 1. Support frame; 2. Housing; 21. Inlet / outlet; 3. Rotary table; 4. Electric heating furnace; 41. Furnace bottom carbon fiber quartz heating tube; 42. Furnace wall carbon fiber quartz heating tube; 43. Temperature sensor; 44. Acid-resistant heat-insulating plate; 45. Pad; 451. Notch; 5. Acid tank; 51. Handle; 52. Acid-resistant sealing ring; 6. Water tank; 7. First motor; 8. Elevator; 81. Second motor; 8 2. Winding reel; 83. Intermediate steering reel; 84. Steel wire; 9. Sliding cover; 91. Elastic pad; 10. Loading basket; 11. Condenser; 111. Cooling section; 112. Connecting section; 113. Spiral condenser tube; 114. Exhaust port; 115. Drain port; 116. Acid gas exhaust pipe; 117. Acid gas inlet; 118. Cooling water inlet; 119. Cooling water outlet; 12. Sealing strip; 13. Slide groove. Detailed Implementation

[0030] Reference Figure 1-15A pickling tank for jewelry production includes a support 1, a box body 2 mounted on the support 1, the box body 2 being hollow inside and having a cover at the top. Inside the box body 2 are an acid bath 5 for pickling the jewelry, an electric heater 4 for heating the acid bath 5, and a water tank 6 for washing the jewelry. A loading basket 10 is mounted on the box body 2, and the jewelry to be pickled is loaded into the loading basket 10. The cover at the top of the box body 2 has an inlet / outlet 21 for the loading basket 10 to enter and exit the box body 2. The loading basket 10 is suspended by a steel wire 84. The basket 10 is suspended on the elevator 8, which delivers it into or removes it from the container 2. The bottom of the container 2 is equipped with a rotating platform 3, on which the acid tank 5, electric heating furnace 4, and water pool 6 are placed. The acid tank 5 is placed inside the electric heating furnace 4. Rotating the rotating platform 3 positions the acid tank 5 or water pool 6 directly below the basket 10. The container 2 is equipped with a sealing cover that can close the inlet / outlet 21. When the sealing cover closes the inlet / outlet 21, the steel wire 84 can move up and down. The container 2 is connected to an air extraction system. The equipment (not shown in the figure) includes a vacuum pump to extract acidic gas from the chamber 2; the acid tank 5 is preferably a glass beaker, but enamel or other acid-resistant containers can also be used; the electric heating furnace 4 has an open top and a hollow interior, and the acid tank 5 is placed inside the electric heating furnace 4 through the open top; the acid and jewelry enter and exit through the open top of the acid tank 5; the top of the acid tank 5 is higher than the top of the electric heating furnace 4 for easy pouring of acid and handling of jewelry; the sides of the electric heating furnace 4... Electric heating sources are installed on the walls and bottom of the furnace 4. These sources heat the acid bath 5 from the bottom and sides, increasing the heating area and improving heating efficiency, thus shortening the time required for acid boiling of jewelry. Specifically, the side walls of the electric furnace 4 are equipped with carbon fiber quartz heating tubes 42, and the bottom of the furnace 4 is equipped with carbon fiber quartz heating tubes 41. The service life of these carbon fiber quartz heating tubes can reach over 5000 hours. The carbon fiber quartz heating tubes are coiled around the side walls and bottom of the electric furnace 4. The electric furnace 4 is equipped with a temperature sensor 43 for detecting the furnace temperature. The temperature sensor 43 is connected to a controller (not shown in the figure) and transmits the detected furnace temperature signal to the controller. Both the bottom carbon fiber quartz heating tube 41 and the wall carbon fiber quartz heating tube 42 are connected to the controller, which controls the heating power of the carbon fiber quartz heating tubes. Figure 4 As shown, a handle 51 is provided on the side wall of the acid tank 5, and the handle 51 is located outside the electric heating furnace 4. A door that can be opened and closed can also be provided on the side wall of the box 2 for taking out and putting in the acid tank 5 and the water pool 6. Of course, the cover at the top of the box 2 can also be designed as a removable movable structure.

[0031] Reference Figure 4-8The acid tank 5 is fitted with an acid-resistant heat-insulating plate 44, which is located on the top opening of the electric heating furnace 4. The acid-resistant heat-insulating plate 44 reduces heat loss from the furnace through the top opening, providing insulation. The plate 44 is made of high-temperature resistant materials, such as aluminum silicate fiber. An acid-resistant layer is provided on the upper surface of the plate 44 to prevent acid from splashing out of the acid tank 5 and causing corrosion. An acid-resistant sealing ring 52 is tightly fitted around the acid tank 5 to prevent acid from splashing out. The sealing ring 52 is set above the acid-resistant heat-insulating protective plate 44. The acid-resistant sealing ring 52 can be made of materials such as polytetrafluoroethylene. Specifically, a groove can be set on the upper surface of the acid-resistant heat-insulating protective plate 44, and the acid-resistant sealing ring 52 can be tightly embedded in the groove. Of course, the groove can also be omitted, and the acid-resistant sealing ring 52 can be tightly attached to the upper surface of the acid-resistant heat-insulating protective plate 44. The acid-resistant sealing ring 52 can prevent acid from entering the electric heating furnace 4 from the gap between the outer wall of the acid tank 5 and the acid-resistant heat-insulating protective plate 44 during the acid pouring process or acid boiling process. Temperature sensor 43 is located at the center of the bottom of electric heating furnace 4. To ensure that the temperature inside the furnace detected by temperature sensor 43 is more accurate during the acid cooking process, a pad 45 is provided at the bottom of electric heating furnace 4 to support acid tank 5. Acid tank 5 is placed on pad 45. Pad 45 has a vertically continuous structure, meaning that pad 45 has no top or bottom and is continuous from top to bottom. The cross-section of pad 45 in the figure is cylindrical, but it can also be polygonal. The heat generated by carbon fiber quartz heating tube 41 at the bottom of the furnace can directly pass through pad 45 to heat the bottom of acid tank 5, reducing heat transfer loss. Multiple notches 451 are provided on the side wall of pad 45 to connect the space inside the electric heating furnace 4 and the bottom, making the temperature inside the furnace detected by temperature sensor 43 more accurate. Pad 45 can also adopt a structure of multiple vertical support plates radiating outward from the center.

[0032] Reference Figure 1 , 11A condenser 11 is installed on the cover at the upper end of the housing 2. The condenser 11 is located between the housing 2 and the extraction equipment. The condenser 11 cools down the acidic gas discharged from the housing 2, causing some of the volatilized acid mist to cool into liquid and be collected, thus reducing the emission of acidic gas. Specifically, the condenser 11 is internally divided into an upper cooling section 111 and a lower connecting section 112. The condenser 11 contains a spiral condenser tube 113 arranged from bottom to top, that is, the spiral condenser tube 113 is spirally arranged from bottom to top in the condenser 11, extending upward from the connecting section 112 into the cooling section 111. The top of the housing 2 is connected to the spiral condenser tube 113 in the connecting section 112. Specifically, the bottom of the condenser 11 has an acidic gas inlet 117, which is connected to an acidic gas discharge pipe 116 located in the connecting section 112. Inside, the acid gas discharge pipe 116 is inclined downwards and connected to the spiral condenser 113 to prevent the acid liquid flowing downwards in the spiral condenser 113 from flowing into the acid gas discharge pipe 116. The acid gas discharge pipe 116 is connected to the housing 2. The acid gas in the housing 2 enters the acid gas discharge pipe 116 through the acid gas inlet 117 and then enters the spiral condenser 113. The top of the spiral condenser 113 is provided with an exhaust port 114, which is connected to the exhaust equipment. The upper and lower parts of the cooling section 111 are respectively provided with a cooling water outlet 119 and a cooling water inlet 118. The cooling water enters from the bottom and exits from the top. The cooling water cools the acid gas in the spiral condenser 113, causing some of the volatilized acid mist to condense into liquid and flow downwards. The bottom of the spiral condenser 113 is connected to a drain port 115, and the condensed acid liquid is discharged and collected through the drain port 115. Depending on the actual situation, the condenser 11 can also be set in other locations, such as the side of the housing 2, as long as it can cool the acidic gas. The condenser 11 can also be set without being divided into two sections, with only a cooling section 111.

[0033] Reference Figure 1-3 9, 10. The rotary table 3 is driven by the first motor 7. Specifically, the power output end of the first motor 7 is connected to a reducer, and the output shaft of the reducer is poweredly connected to the rotary table 3; see reference. Figure 1 , 29, 10. The lifting platform 8 includes a second motor 81. The power output end of the second motor 81 is connected to a winding wheel 82. Specifically, the power output end of the second motor 81 is connected to a reducer. The power output shaft of the reducer is poweredly connected to the winding wheel 82. The second motor 81 can rotate in both directions, enabling the steel wire 84 to be wound or fed out on the winding wheel 82, thereby achieving the lifting and lowering of the loading basket 10. The steel wire 84 suspending the loading basket 10 is wound on the winding wheel 82. After extending from the winding wheel 82, the steel wire 84 is supported by an intermediate steering wheel 83. The steel wire 84 extends downward through the intermediate steering wheel 83 and is fixedly connected to the loading basket 10. The intermediate steering wheel 83 and the loading basket 10 are located directly above the inlet / outlet 21. Of course, the intermediate steering wheel 83 can also be omitted, and the steel wire 84 output from the winding wheel 82 can be directly connected to the loading basket 10. The upper surface of the housing 2 is provided with a sealing strip 12 around the inlet / outlet 21. The sealing includes two sliding covers 9 located above the inlet / outlet 21. The lower surface of the sliding cover 9 contacts the sealing strip 12. The two sliding covers 9 can slide towards each other and away from each other. When the sliding covers 9 slide towards each other until they are joined, the sliding covers 9 close the inlet / outlet 21. The steel wire 84 is sandwiched between the joint surfaces of the two sliding covers 9. To improve the sealing effect, the joint surfaces of the two sliding covers 9 are provided with elastic pads 91. The elastic pads 91 can be made of materials such as silicone. Since the end of the steel wire 84 is fixedly connected to the loading basket 10, the loading basket 10 exerts a pulling force on the steel wire 84, so that the steel wire 84 can still slide up and down while sandwiched between the elastic pads 91. When the two sliding covers 9 slide away from each other, the inlet / outlet 21 opens. At this time, the loading basket 10 can enter and exit the box 2. To facilitate the sliding of the sliding covers 9, there are sliding grooves 13 on both sides of the sliding covers 9. The sliding covers 9 can slide left and right along the sliding grooves 13.

[0034] Instructions for use: (e.g.) Figure 12-15As shown, the jewelry to be acid-treated is placed in the loading basket 10, the inlet / outlet 21 is opened, and the rotating table 3 is rotated so that the acid tank 5 is directly below the loading basket 10. The loading basket 10 is then lowered through the inlet / outlet 21 and into the chamber 2 via the elevator 8. The inlet / outlet 21 is then closed with the sliding cover 9. The carbon fiber quartz heating tube 41 at the bottom of the furnace and the carbon fiber quartz heating tube 42 on the furnace wall are energized, and high-power heating is started to rapidly raise the temperature inside the furnace (the temperature can reach over 1000℃). By increasing the temperature difference between the electric heating furnace 4 and the acid solution, the heating rate of the acid solution is accelerated, and the heating time is shortened. When the acid solution... When heated to the acid cooking temperature, the loading basket 10 is lowered into the acid tank 5 via the elevator 8 to begin acid cooking. The controller controls the electric heating furnace 4 to enter the heat preservation mode. The temperature sensor 43 transmits the furnace temperature signal to the controller. When the furnace temperature drops to a certain level, the controller controls the bottom carbon fiber quartz heating tube 41 and the furnace wall carbon fiber quartz heating tube 42 to heat at high power. When the furnace temperature rises to a certain level, the controller controls the bottom carbon fiber quartz heating tube 41 and the furnace wall carbon fiber quartz heating tube 42 to heat at low power. The starting heating temperature, time, and high / low temperature switching parameters are all specified. Based on experimental data, after obtaining parameters such as heating temperature and time, a program heating can be set to preheat the acid bath 5, further shortening the acid boiling time. Simultaneously with the start of heating by the electric heater 4, the exhaust system is activated to extract the acidic gas generated within the chamber 2. This acidic gas flows upward through the spiral condenser tube 113 in the condenser 11. Some of the volatile acid mist contained in the acidic gas is cooled by the condenser 11 to form acid liquid. This acid liquid flows downward through the spiral condenser tube 113 and is finally discharged and collected through the drain port 115, reducing the amount of acidic gas. After the acid boiling is completed, stop heating and use the elevator 8 to lift the loading basket 10 out of the acid tank 5. After lifting to a certain height, stop lifting. The loading basket 10 is still in the box 2. Rotate the rotating table 3 so that the water tank 6 is directly below the loading basket 10. The elevator 8 lowers the loading basket 10 into the water tank 6 to wash away the residual acid on the jewelry. After rinsing with water, lift the loading basket 10 out of the water tank 6. After the suction equipment has been suctioning the box 2 for a period of time and the acid gas in the box 2 has been significantly reduced, turn off the suction equipment, remove the sliding cover 9, and lift the loading basket 10 out of the box 2. The acid boiling is then complete.The electric heating furnace 4 of this invention uses carbon fiber quartz heating tubes as a heat source, resulting in lower electricity costs compared to natural gas. Compared to a gas stove heating the acid tank 5 from the bottom, the electric heating furnace 4 heats the acid tank 5 simultaneously from the bottom and sides, increasing the heating area of ​​the acid tank 5, improving thermal efficiency, and thus shortening the acid boiling time. Compared to natural gas heating, the electric heating furnace 4 can reach the acid equilibrium point in a shorter time. During the acid boiling and washing of jewelry, the inlet and outlet ports 21 are sealed to prevent the acid gas from spreading outwards. Simultaneously, the extraction device draws out the acid gas from the chamber 2, and some of the volatile acid mist in the acid gas is cooled into acid liquid by the condenser 11, further reducing acid gas emissions. The acid tank 5 and water pool 6 are placed on a rotating platform 3, which, in conjunction with the elevator 8, keeps the chamber 2 sealed from acid boiling to washing, preventing the acid gas from spreading outwards. This acid boiling chamber is suitable for acid boiling treatment of gold and other jewelry.

[0035] This invention relates to a pickling tank equipped with an electric heater that heats the acid solution tank from both the bottom and sides. Compared to a gas stove which only heats from the bottom, the electric heater increases the heating area of ​​the acid solution tank, improves thermal efficiency, and shortens the pickling time. The carbon fiber quartz heating tube in the electric heater uses electricity, which is cheaper than natural gas. A temperature sensor at the bottom of the electric heater transmits the detected temperature signal to a controller, which adjusts the heating power of the carbon fiber quartz heating tube based on the temperature signal. A through-type pad is installed at the bottom of the electric heater, minimizing its impact on the heating efficiency of the carbon fiber quartz heating tube at the bottom. The pad has notches on its sidewalls to connect the bottom and side spaces of the furnace, making the temperature data detected by the temperature sensor more accurate. By rotating the rotary table, the acid tank or water pool is positioned directly below the loading basket. The loading basket can be lowered into the acid tank or water pool using a lift, or it can be lifted out of the acid tank or water pool. When acid boiling and washing jewelry, the acid boiling tank is in a sealed state. At the same time, the acid boiling tank is evacuated using an exhaust device to reduce the diffusion of acidic gases generated during the acid boiling process, reducing the impact on the working environment and the harm to the workers. After the acidic gases are extracted, they are cooled by a condenser, causing some of the volatilized acid mist to condense into acid liquid. The acid liquid is collected to reduce the emission of acidic gases.

Claims

1. A pickling tank for jewelry production, comprising a support (1), characterized in that: The bracket (1) is provided with a hollow box (2) with a cover at the top. The box (2) is provided with a loading basket (10) for loading jewelry. The loading basket (10) is suspended on a lifting device by a wire. The cover at the top of the box (2) is provided with an inlet / outlet (21) for the loading basket (10) to enter and exit the box (2). The inlet / outlet (21) is provided with a sealing cover that can close the inlet / outlet (21). When the sealing cover closes the inlet / outlet (21), the wire can move up and down. The bottom of the box (2) is provided with a rotating platform (3). The rotating platform (3) is provided with an acid tank (5), an electric heating furnace (4) for heating the acid tank (5), and a water pool (6). The top of the acid tank (5) is open, the top of the electric heating furnace (4) is open and the interior is hollow. The acid tank (5) is placed in the electric heating furnace (4). The side wall and bottom of the electric heating furnace (4) are respectively provided with electric heating heat sources. The rotating table (3) is rotated so that the acid tank (5) or water pool (6) is located directly below the loading basket (10). The box (2) is connected to a gas extraction device that can extract the acid gas in the box (2). The electric heating furnace (4) is provided with a temperature sensor (43) for detecting the temperature inside the furnace. The electric heating heat source is connected to a controller that can control the heating power of the electric heating heat source. The controller is connected to the temperature sensor (43) for signal connection.

2. The acid-boiling tank for jewelry production according to claim 1, characterized in that: The electric heating source is a carbon fiber quartz heating tube.

3. The acid-boiling tank for jewelry production according to claim 1, characterized in that: The top of the acid tank (5) is higher than the top of the electric heating furnace (4); the top opening of the electric heating furnace (4) is provided with an acid-resistant heat insulation plate (44) that is fitted outside the acid tank (5) to reduce the heat loss inside the furnace; the outside of the acid tank (5) is tightly fitted with an acid-proof sealing ring (52) to prevent the acid in the acid tank (5) from entering the electric heating furnace (4); the acid-proof sealing ring (52) is located above the acid-resistant heat insulation plate (44).

4. The acid-boiling tank for jewelry production according to claim 1, characterized in that: The temperature sensor (43) is located at the bottom of the electric heating furnace (4); the bottom of the electric heating furnace (4) is provided with a through-type pad (45), the acid tank (5) is placed on the pad (45), and the side wall of the pad (45) is provided with multiple notches (451).

5. The acid-boiling tank for jewelry production according to claim 1, characterized in that: A condenser (11) for cooling acidic gas is provided between the housing (2) and the extraction equipment. The condenser (11) is provided with a spiral condenser tube (113) arranged from bottom to top. The housing (2) is connected to the lower part of the spiral condenser tube (113), and the top of the spiral condenser tube (113) is connected to the extraction equipment.

6. The acid-boiling tank for jewelry production according to claim 5, characterized in that: The lower part of the condenser (11) is provided with an acid gas discharge pipe (116) connected to the housing (2), and the acid gas discharge pipe (116) is inclined downward and connected to the lower part of the spiral condenser (113).

7. The acid-boiling tank for jewelry production according to claim 6, characterized in that: The bottom of the spiral condenser (113) is connected to a drain port (115) for discharging the condensed acid liquid.

8. The acid-boiling tank for jewelry production according to claim 1, characterized in that: The upper surface of the box (2) is provided with a sealing strip (12) surrounding the inlet / outlet (21). The sealing cover includes two sliding covers (9) located above the inlet / outlet (21) and capable of sliding. The lower surface of the sliding cover (9) is in contact with the sealing strip (12). When the two sliding covers (9) slide together or move away from each other, the inlet / outlet (21) is closed or opened. An elastic pad (91) is provided at the joint of the two sliding covers (9). When the sealing cover closes the inlet / outlet (21), the line is sandwiched between the elastic pads (91) at the joint of the sliding covers (9).

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