A sampling device for electroplating wastewater

Abstract

The application relates to the technical field of sampling devices, and specifically discloses a sampling device for electroplating wastewater, which comprises an adjusting tank, water outlets are communicated with the upper, middle and lower liquid surfaces of the adjusting tank, water valves are arranged at the ends of the water outlets close to the upper, middle and lower liquid surfaces of the adjusting tank, sampling pipes are communicated with the ends of the water outlets away from the adjusting tank, sampling valves are arranged on the sampling pipes, sampling boxes are arranged at the ends of the sampling pipes away from the water outlets, sampling mechanisms are arranged in the sampling boxes, the water valve at the upper liquid surface of the adjusting tank is opened, the sampling valve is opened, the electroplating wastewater can flow into the sampling pipes through the water outlets, the sampling mechanisms can respectively sample the electroplating wastewater at the upper, middle and lower liquid surfaces of the adjusting tank, and the samples can be stored in the sampling boxes, and then the sampling of the middle and lower liquid surfaces is sequentially carried out after the sampling is completed, so that the electroplating wastewater in the adjusting tank is subjected to layered sampling, the accuracy and comprehensiveness of the samples are improved, and the process control accuracy is improved.

Description

Technical Field

[0001] This application relates to the field of sampling device technology, and in particular to a sampling device for electroplating wastewater. Background Technology

[0002] Electroplating wastewater is a highly toxic industrial wastewater generated during the electroplating production process, containing heavy metal ions, cyanides, acids, alkalis, and organic complexes. Its complex composition and fluctuating concentrations pose a persistent threat to aquatic ecosystems and human health. To accurately monitor pollution loads and optimize treatment processes, representative sampling of the wastewater is necessary. An electroplating wastewater sampling device is a specialized tool used to collect water samples at production line discharge points, equalization tanks, or process unit nodes. Its core function is to obtain samples that conform to spatiotemporal distribution patterns, ensuring that the test data accurately reflects the characteristics of the wastewater. This device is widely used in electroplating companies' self-inspection, environmental regulatory enforcement, and wastewater treatment process research and development, serving as the first line of defense for the reliability of environmental monitoring data.

[0003] In existing technologies, electroplating wastewater sampling mainly relies on manual or semi-automatic devices, which typically include a corrosion-resistant sampling head, a flow guide hose, a sample storage bottle, and a fixed support. The sampling head is usually made of stainless steel or polytetrafluoroethylene and is inserted into the wastewater discharge pipe or regulating tank, where the water flow is driven by gravity or a micro pump. The flow guide hose connects the sampling head and the sample storage bottle to ensure that there is no secondary pollution transfer of the wastewater. The sample storage bottle is placed inside a box, and all components are mechanically connected by threaded interfaces or quick-connect clips. During operation, it is necessary to manually locate the sampling point, open the valve, and record the time. The function of such devices is focused on a single physical sampling.

[0004] Regarding the aforementioned technologies, existing sampling devices can only sample the surface of electroplating wastewater conditioning tanks. The surface electroplating wastewater may have distorted heavy metal concentrations, missed detection of highly toxic cyanide, and falsely high oil concentrations, thus causing the electroplating wastewater samples to be distorted and misleading the control of treatment processes or environmental risk assessments. Therefore, improvements are needed. Utility Model Content

[0005] In order to perform stratified sampling of electroplating wastewater in the equalization tank, this application provides a sampling device for electroplating wastewater.

[0006] The sampling device for electroplating wastewater provided in this application adopts the following technical solution:

[0007] A sampling device for electroplating wastewater includes an equalization tank. Outlet pipes are connected to the upper, middle, and lower liquid levels of the equalization tank. Outlet valves are installed at the ends of the outlet pipes near the upper, middle, and lower liquid levels of the equalization tank. A filter screen is installed at the end of the outlet pipe closest to the equalization tank. A sampling pipe is connected to the end of the outlet pipe furthest from the equalization tank. A sampling valve is installed on the sampling pipe. A cabinet is installed on one side of the sampling pipe. A sampling box and a placement box are installed inside the cabinet. The placement box is located above the sampling box. A sampling mechanism for stratified sampling of the electroplating wastewater in the equalization tank is installed inside the sampling box.

[0008] By adopting the above technical solution, the outlet valve at the liquid level of the regulating tank is opened, and the sampling valve is opened. The electroplating wastewater can flow into the sampling tube through the outlet pipe. The sampling mechanism in this application can sample the electroplating wastewater at the upper, middle and lower liquid levels in the regulating tank separately and store the samples in the sampling box. After sampling is completed, the middle and lower liquid levels are sampled in sequence, thereby realizing the stratified sampling of electroplating wastewater in the regulating tank, improving the accuracy and comprehensiveness of the samples, and thus improving the accuracy of process control. The filter screen can prevent impurities in the electroplating wastewater from entering the sampling tube and reduce the impact of impurities on the sampling device.

[0009] Optionally, the sampling mechanism includes a sample storage bottle, an electric telescopic rod, a telescopic tube, a sample outlet head, a sealing cap, a rotation switching assembly, and a rinsing component. Multiple sets of sample storage bottles are provided, all placed inside the sampling box, with one set located below the sampling tube. The fixed end of the electric telescopic rod is located on the inner top wall of the sampling box. The telescopic tube is connected to the end of the sampling tube away from the water outlet pipe, and its telescopic end is fixedly connected to the telescopic end of the electric telescopic rod. The sample outlet head is located at the end of the telescopic tube away from the sampling tube. Multiple sets of sealing caps are provided, each located at the opening of one of the multiple sets of sample storage bottles. The rotation switching assembly is located on the inner bottom wall of the sampling box for rotating and switching the multiple sets of sample storage bottles. The rinsing component is located inside the placement box for rinsing the sampling tube.

[0010] By adopting the above technical solution, the electric telescopic rod is activated, and its telescopic end lowers the telescopic tube. This descent of the telescopic tube lowers the sample outlet, inserting it into the sealed cap of the sample storage bottle. After sampling, the electric telescopic rod is activated again, causing its telescopic end to rise synchronously with the telescopic tube and the sample outlet, thus removing the sample outlet from the outside of the sample storage bottle. The sealed cap is then restored to a sealed state. This process allows for the sampling of electroplating wastewater from the sampling tube into the sample storage bottle for sealing, preventing the volatilization of cyanide in the wastewater and avoiding contact between personnel and the wastewater, thereby improving sampling safety.

[0011] Optionally, the rotary switching assembly includes a drive motor, an indexing turntable, and an indexing wheel. The drive motor is located at the lower end of the cabinet, and its output end passes through the sampling box. The indexing wheel is located on the output end of the drive motor. The indexing turntable is rotatably mounted on the inner bottom wall of the sampling box and meshes with the indexing wheel. The upper end of the indexing turntable has multiple sets of placement slots, and multiple sets of sample bottles are placed in the multiple sets of placement slots.

[0012] By adopting the above technical solution, after a set of sample bottles has been sampled, the drive motor is started. The output end of the drive motor rotates, which drives the indexing wheel to rotate. Since the indexing wheel and the indexing turntable mesh with each other, and multiple sets of sample bottles are placed in the placement slot of the indexing turntable, the rotation of the indexing wheel can drive the indexing turntable and the sample bottles to rotate synchronously, thereby realizing the switching of multiple sets of sample bottles, which facilitates the stratified sampling of electroplating wastewater in the regulating tank and reduces the cost of manual operation.

[0013] Optionally, the rinsing component includes a water storage tank and a drain pipe. The water storage tank is disposed inside the placement box, and its outlet is connected to the end of the sampling tube away from the outlet pipe. The drain pipe is connected to the end of the sampling tube near the outlet pipe. Both the outlet of the water storage tank and the drain pipe are equipped with drain valves.

[0014] By adopting the above technical solution, after sampling is completed, the drain valve is opened, and the water in the water storage tank can flow into the sampling tube through the drain pipe and finally flow out from the drain pipe, thereby rinsing the sampling tube, reducing the impact of residual heavy metals in the sampling tube on subsequent sampling, improving the accuracy of subsequent samples, and reducing maintenance costs.

[0015] Optionally, the placement box is equipped with a first liquid storage tank and a second liquid storage tank, both of which are connected to the end of the sampling tube away from the water outlet pipe. The first liquid storage tank stores sodium hydroxide solution, and the second liquid storage tank stores nitric acid solution. The outlet end of the first liquid storage tank is equipped with a first valve, and the outlet end of the second liquid storage tank is equipped with a second valve.

[0016] By adopting the above technical solution, after the first set of samples is taken at the liquid level in the regulating tank, the sampling valve is closed and the first valve is opened. The sodium hydroxide solution in the first storage tank can enter the storage bottle through the sampling tube, telescopic tube and sample outlet. After the addition is completed, the second set of samples at the liquid level is taken. After the second set of samples is taken, the sampling valve is closed and the second valve is opened. The nitric acid solution in the second storage tank can enter the storage bottle through the sampling tube, telescopic tube and sample outlet. The sodium hydroxide solution in this application can prevent the volatilization of cyanide in electroplating wastewater, and the nitric acid solution can improve the stability of chromium, nickel and copper in electroplating wastewater, thereby improving the accuracy and integrity of the samples.

[0017] Optionally, multiple sets of rotating rods are rotatably arranged at intervals on the inner peripheral wall of the sampling tube, and multiple sets of scrapers are rotatably arranged at intervals on the outer peripheral wall of the multiple sets of rotating rods.

[0018] By adopting the above technical solution, when electroplating wastewater and rinsing water pass through the sampling tube, the water flow impact can drive the scraper to rotate on the rotating rod, thereby using the water flow impact to drive the scraper to scrape off the crystals attached to the inner circumferential wall of the sampling tube, preventing the crystals from clogging the sampling tube, reducing the impact of the attached crystals on subsequent sampling, and reducing maintenance costs. In addition, when rinsing the sampling tube with clean water, the scraped crystals can also be rinsed off to prevent crystal accumulation.

[0019] Optionally, a thermostat is provided on one side of the housing to keep the sampling box at a constant temperature.

[0020] By adopting the above technical solution, the thermostat can maintain the low-temperature environment required for storing electroplating wastewater in the sampling box, thereby improving the stability of heavy metals and cyanides in the electroplating wastewater and enhancing the accuracy and authenticity of the samples.

[0021] Optionally, a controller is provided on the side wall of the placement box.

[0022] By adopting the above technical solution, the controller can centrally control and coordinate the operation of the outlet valve, electric telescopic rod, drive motor, drain valve, first valve, second valve and thermostat, thereby realizing automatic stratified sampling of electroplating wastewater in the regulating tank, reducing labor costs and operational risks.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. The sampling mechanism in this application can perform stratified sampling of electroplating wastewater in the regulating tank. Activating the electric telescopic rod causes the telescopic end of the telescopic tube to descend, which in turn causes the sampling head to descend, inserting it into the sealed cap of the sample storage bottle. After sampling, activating the electric telescopic rod causes the telescopic end of the telescopic tube and the sampling head to rise synchronously, removing the sampling head from the outside of the sample storage bottle and restoring the sealed cap to a sealed state. This achieves the sampling of electroplating wastewater from the sampling tube into the sample storage bottle for sealing, preventing the volatilization of cyanide in the wastewater, avoiding contact between personnel and the wastewater, and improving sampling safety.

[0025] 2. The rotary switching component in this application can rotate and switch multiple sets of sample bottles. After sampling of a set of sample bottles is completed, the drive motor is started. The output end of the drive motor rotates and drives the indexing wheel to rotate. Since the indexing wheel and the indexing turntable mesh with each other, and multiple sets of sample bottles are placed in the placement slot of the indexing turntable, the rotation of the indexing wheel can drive the indexing turntable and the sample bottles to rotate synchronously, thereby realizing the switching of multiple sets of sample bottles, which facilitates the stratified sampling of electroplating wastewater in the regulating tank and reduces the cost of manual operation.

[0026] 3. The rinsing device in this application can rinse the sampling tube. After sampling is completed, the drain valve is opened, and the water in the water tank can flow into the sampling tube through the drain pipe and finally flow out from the drain pipe, thereby rinsing the sampling tube, reducing the impact of residual heavy metals in the sampling tube on subsequent sampling, improving the accuracy of subsequent samples, and reducing maintenance costs. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application;

[0029] Figure 2 This is a partial structural diagram;

[0030] Figure 3 This is a schematic diagram of another part of the structure;

[0031] Figure 4 This is a partial structural diagram.

[0032] Reference numerals: 1. Adjustment tank; 11. Outlet pipe; 12. Outlet valve; 13. Sampling pipe; 14. Sampling valve; 15. Sampling box; 16. Placement box; 17. Cabinet; 2. Sampling mechanism; 21. Sample storage bottle; 22. Electric telescopic rod; 23. Telescopic pipe; 24. Sample outlet head; 25. Sealing cap; 3. Rotary switching assembly; 31. Drive motor; 32. Indexing turntable; 33. Indexing wheel; 34. Placement slot; 4. Rinsing component; 41. Water storage tank; 42. Drain pipe; 43. Drain valve; 5. First liquid storage tank; 51. Second liquid storage tank; 52. First valve; 53. Second valve; 6. Rotating rod; 61. Scraper; 7. Thermostat; 8. Controller. Detailed Implementation

[0033] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0034] This application discloses a sampling device for electroplating wastewater, referring to... Figure 1 , Figure 2 and Figure 3 The sampling device for electroplating wastewater includes an equalization tank 1. An outlet pipe 11 is connected to the upper, middle, and lower liquid levels of the equalization tank 1. An outlet valve 12 is fixedly installed at one end of the outlet pipe 11 near the upper, middle, and lower liquid levels of the equalization tank 1. A filter screen is fixedly installed at the end of the outlet pipe 11 near the equalization tank 1. A sampling pipe 13 is connected to the end of the outlet pipe 11 away from the equalization tank 1. A sampling valve 14 is fixedly installed on the sampling pipe 13. A cabinet 17 is fixedly installed on one side of the sampling pipe 13. A sampling box 15 and a placement box 16 are fixedly installed inside the cabinet 17. The placement box 16 is located above the sampling box 15. A sampling mechanism 2 is installed inside the sampling box 15.

[0035] Open the outlet valve 12 at the liquid level of the regulating tank 1 and open the sampling valve 14. The electroplating wastewater can flow through the outlet pipe 11 into the sampling pipe 13. The sampling mechanism 2 in this application can sample the electroplating wastewater at the upper, middle and lower liquid levels in the regulating tank 1 separately and store the samples in the sampling box 15. After sampling is completed, sampling is carried out at the middle and lower liquid levels in sequence, thereby realizing the stratified sampling of electroplating wastewater in the regulating tank 1, improving the accuracy and comprehensiveness of the samples, and thus improving the accuracy of process control. The filter screen can prevent impurities in the electroplating wastewater from entering the sampling pipe 13 and reduce the impact of impurities on the sampling device.

[0036] Reference Figure 2 and Figure 3 In order to sample and seal the electroplating wastewater in the upper, middle and lower layers of the regulating tank 1, the sampling mechanism 2 in this embodiment includes a sample storage bottle 21, an electric telescopic rod 22, a telescopic tube 23, a sample outlet 24, a sealing cap 25, a rotary switching assembly 3 and a rinsing component 4. Multiple sets of sample storage bottles 21 are provided, and all sets of sample storage bottles 21 are placed in the sampling box 15, with one set of sample storage bottles 21 located below the sampling tube 13. The fixed end of the electric telescopic rod 22 is fixedly installed on the inner top wall of the sampling box 15. The telescopic tube 23 is connected to the end of the sampling tube 13 away from the water outlet pipe 11, and the telescopic end is fixedly connected to the telescopic end of the electric telescopic rod 22. The sample outlet 24 is fixedly installed at the end of the telescopic tube 23 away from the sampling tube 13. Multiple sets of sealing caps 25 are provided, and multiple sets of sealing caps 25 are respectively fixedly installed at the openings of multiple sets of sample storage bottles 21. The rotary switching assembly 3 is installed on the inner bottom wall of the sampling box 15, and the rinsing component is installed in the placement box 16.

[0037] Activating the electric telescopic rod 22 causes its telescopic end to descend, which in turn lowers the telescopic end of the telescopic tube 23. This descent of the telescopic tube 23 then lowers the sample dispensing head 24, inserting it into the sealing cap 25 of the sample storage bottle 21. After sampling, activating the electric telescopic rod 22 causes its telescopic end to rise simultaneously, raising both the telescopic end of the telescopic tube 23 and the sample dispensing head 24. This removes the sample dispensing head 24 from the outside of the sample storage bottle 21, and the sealing cap 25 returns to a sealed state. This method allows for the sampling of electroplating wastewater from the sampling tube 13 into the storage bottle 21 and its sealing. This prevents the volatilization of cyanide in the electroplating wastewater and avoids contact between workers and the wastewater, thus improving the safety of the sampling. In this embodiment, twelve sets of storage bottles 21 are provided. These twelve sets of storage bottles 21 can collect four samples from the upper, middle, and lower layers of electroplating wastewater in the regulating tank 1. In addition, the sealing cap 25 in this embodiment is made of butyl rubber, which is a preferred material in this embodiment. Other materials such as fluororubber can also be used.

[0038] Reference Figure 2 and Figure 3 After a set of samples is collected, the next sample bottle 21 needs to be switched to the area below the sample outlet 24 for the next set of samples. Therefore, the rotating switching component 3 in this embodiment includes a drive motor 31, a dividing turntable 32 and a dividing wheel 33. The drive motor 31 is bolted to the lower end of the cabinet 17 and its output end passes through the sampling box 15. The dividing wheel 33 is fixedly installed on the output end of the drive motor 31. The dividing turntable 32 is rotatably installed on the inner bottom wall of the sampling box 15 and meshes with the dividing wheel 33. Multiple sets of placement slots 34 are opened on the upper end of the dividing turntable 32, and multiple sets of sample bottles 21 are placed in the multiple sets of placement slots 34 respectively.

[0039] After a set of sample bottles 21 has finished sampling, the drive motor 31 is started. The output end of the drive motor 31 rotates, which drives the indexing wheel 33 to rotate. Since the indexing wheel 33 and the indexing turntable 32 mesh with each other, and multiple sets of sample bottles 21 are placed in the placement slot 34 of the indexing turntable 32, the rotation of the indexing wheel 33 can drive the indexing turntable 32 and the sample bottles 21 to rotate synchronously, thereby realizing the switching of multiple sets of sample bottles 21, which facilitates the stratified sampling of electroplating wastewater in the regulating tank 1 and reduces the cost of manual operation.

[0040] Reference Figure 2 and Figure 3In this embodiment, the rinsing component 4 can rinse the sampling tube 13 to reduce the impact of residual heavy metals in the sampling tube 13 on subsequent sampling. It includes a water storage tank 41 and a drain pipe 42. The water storage tank 41 is fixedly installed in the placement box 16, and the water outlet is connected to the end of the sampling tube 13 away from the water outlet pipe 11. The drain pipe 42 is connected to the end of the sampling tube 13 near the water outlet pipe 11. A drain valve 43 is fixedly installed on both the water outlet of the water storage tank 41 and the drain pipe 42.

[0041] After sampling is completed, the drain valve 43 is opened, and the water in the water tank 41 flows through the drain pipe 42 into the sampling tube 13, and finally flows out from the drain pipe 42, thereby rinsing the sampling tube 13, reducing the impact of residual heavy metals in the sampling tube 13 on subsequent sampling, improving the accuracy of subsequent samples, and reducing maintenance costs. In this embodiment, a cylinder is fixedly installed on the side wall of the sampling box 15, and a hose is installed below the cylinder. One end of the hose is fixedly connected to the telescopic end of the cylinder, and the other end of the hose is connected to the drain pipe 42 and is away from the end of the drain pipe 42. Located below the sampling head 24, before rinsing, the cylinder is activated. The telescopic end of the cylinder drives the hose to move below the sampling head 24, thereby collecting the wastewater from rinsing the sampling tube 13, telescopic tube 23, and sampling head 24. After collection, the cylinder is activated to move the hose to a side away from the sampling head 24. After moving, the next batch of electroplating wastewater can be sampled. In addition, in this embodiment, the lower end of the drain pipe 42 is connected to a waste liquid collection box, which can collect the wastewater from rinsing the sampling tube 13, telescopic tube 23, and sampling head 24, avoiding secondary pollution caused by wastewater.

[0042] Reference Figure 2 and Figure 3 Since the electroplating wastewater sample cannot be stably preserved after being sealed in the sample storage bottle 21, the first liquid storage tank 5 and the second liquid storage tank 51 are fixedly installed in the placement box 16 in this embodiment, and both are connected to the end of the sampling tube 13 away from the water outlet pipe 11. The first liquid storage tank 5 stores sodium hydroxide solution, and the second liquid storage tank 51 stores nitric acid solution. The outlet end of the first liquid storage tank 5 is fixedly installed with a first valve 52, and the outlet end of the second liquid storage tank 51 is fixedly installed with a second valve 53.

[0043] After the first set of samples is taken at the liquid level of the regulating tank 1, the sampling valve 14 is closed and the first valve 52 is opened. The sodium hydroxide solution in the first storage tank 5 can enter the sample storage bottle 21 through the sampling tube 13, the telescopic tube 23 and the sample outlet 24. After the addition is completed, the second set of samples at the liquid level is taken. After the second set of samples is taken, the sampling valve 14 is closed and the second valve 53 is opened. The nitric acid solution in the second storage tank 51 can enter the sample storage bottle 21 through the sampling tube 13, the telescopic tube 23 and the sample outlet 24. The sodium hydroxide solution in this application can prevent the volatilization of cyanide in electroplating wastewater, and the nitric acid solution can improve the stability of chromium, nickel and copper in electroplating wastewater, thereby improving the accuracy and integrity of the samples.

[0044] Reference Figure 4 When electroplating wastewater flows through the sampling tube 13, crystals may form on the tube wall. In order to scrape off the crystals, multiple sets of rotating rods 6 are rotatably installed on the inner circumferential wall of the sampling tube 13 in this embodiment. Multiple sets of scraper blades 61 are welded to the outer circumferential wall of the multiple sets of rotating rods 6 at intervals. When the electroplating wastewater and the rinsing water pass through the sampling tube 13, the water flow impact can drive the scraper blades 61 to rotate on the rotating rods 6, thereby realizing the scraping of the crystals attached to the inner circumferential wall of the sampling tube 13 by the water flow impact, preventing the crystals from clogging the sampling tube 13, reducing the impact of the attached crystals on subsequent sampling, and reducing maintenance costs. In addition, when rinsing the sampling tube 13 with clean water, the scraped crystals can also be rinsed to prevent crystal accumulation.

[0045] Reference Figure 1 and Figure 3 The electroplating wastewater sample in the sampling box 15 needs to be stored at a constant temperature. Therefore, a thermostat 7 is fixedly installed on one side of the shell in this embodiment. The thermostat 7 can maintain the low temperature environment required for storing the electroplating wastewater sample in the sampling box 15, thereby improving the stability of heavy metals and cyanide in the electroplating wastewater and improving the accuracy and authenticity of the sample. In this embodiment, a heat insulation layer is installed on the inner peripheral wall of the sampling box 15. The heat insulation layer can improve the heat insulation effect of the sampling box 15 and reduce the energy consumption of the thermostat 7.

[0046] Reference Figure 3 In order to centrally control and coordinate the operation of the outlet valve 12, electric telescopic rod 22, drive motor 31, drain valve 43, first valve 52, second valve 53 and thermostat 7, a controller 8 is bolted to the side wall of the placement box 16 in this embodiment. The controller 8 can centrally control and coordinate the operation to automatically sample the electroplating wastewater in the regulating tank 1 in layers, thereby reducing labor costs and operational risks.

[0047] The implementation principle of the sampling device for electroplating wastewater in this application embodiment is as follows:

[0048] Activate the electric telescopic rod 22. The telescopic end of the electric telescopic rod 22 drives the telescopic end of the telescopic tube 23 to descend. The descent of the telescopic end of the telescopic tube 23 drives the sample outlet head 24 to descend, thereby inserting the sample outlet head 24 into the sealing cap 25 of the sample storage bottle 21. After sampling is completed, activate the electric telescopic rod 22. The telescopic end of the electric telescopic rod 22 drives the telescopic end of the telescopic tube 23 and the sample outlet head 24 to rise synchronously, thereby removing the sample outlet head 24 to the outside of the sample storage bottle 21, and restoring the sealing cap 25 to a sealed state. This achieves the sampling of electroplating wastewater in the sampling tube 13 into the sample storage bottle 21 and sealing it to prevent the volatilization of cyanide in the electroplating wastewater and also avoids contact between personnel and electroplating wastewater, improving the safety of sampling.

[0049] When the drive motor 31 is started, the output end of the drive motor 31 rotates, which drives the indexing wheel 33 to rotate. Since the indexing wheel 33 meshes with the indexing turntable 32, and multiple sets of sample bottles 21 are placed in the placement slots 34 of the indexing turntable 32, the rotation of the indexing wheel 33 can drive the indexing turntable 32 and the sample bottles 21 to rotate synchronously, thereby realizing the switching of multiple sets of sample bottles 21, which facilitates the stratified sampling of electroplating wastewater in the regulating tank 1 and reduces the cost of manual operation.

[0050] By opening the drain valve 43, the water in the water storage tank 41 can flow through the drain pipe 42 into the sampling tube 13 and finally flow out from the drain pipe 42, thereby rinsing the sampling tube 13, reducing the impact of residual heavy metals in the sampling tube 13 on subsequent sampling, improving the accuracy of subsequent samples, and reducing maintenance costs.

[0051] Unless otherwise defined, the technical or scientific terms used in this application shall have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," "third," and similar terms used in this application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. The terms "an" or "a" and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms "comprising" or "including" and similar terms mean that the elements or objects preceding "comprising" or "including" encompass the elements or objects listed following "comprising" or "including" and their equivalents, and do not exclude other elements or objects. "Above," "below," "left," "right," etc., are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0052] The above are all optional embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A sampling device for electroplating wastewater, comprising an equalization tank (1), characterized in that: The regulating tank (1) is connected to the upper, middle and lower liquid levels by water outlet pipes (11). Water outlet valves (12) are provided at the ends of the water outlet pipes (11) near the upper, middle and lower liquid levels of the regulating tank (1). A filter screen is provided at the end of the water outlet pipes (11) near the regulating tank (1). A sampling pipe (13) is connected at the end of the water outlet pipes (11) away from the regulating tank (1). A sampling valve (14) is provided on the sampling pipe (13). A cabinet (17) is provided on one side of the sampling pipe (13). A sampling box (15) and a placement box (16) are provided inside the cabinet (17). The placement box (16) is located above the sampling box (15). A sampling mechanism (2) for stratified sampling of electroplating wastewater in the regulating tank (1) is provided inside the sampling box (15).

2. The sampling device for electroplating wastewater according to claim 1, characterized in that: The sampling mechanism (2) includes a sample storage bottle (21), an electric telescopic rod (22), a telescopic tube (23), a sample outlet (24), a sealing cap (25), a rotation switching assembly (3), and a rinsing component (4). Multiple sets of sample storage bottles (21) are provided, all placed inside the sampling box (15). One set of sample storage bottles (21) is located below the sampling tube (13). The fixed end of the electric telescopic rod (22) is located on the inner top wall of the sampling box (15). The telescopic tube (23) and the sampling tube (13) are located away from the water outlet pipe (11). One end is connected, and the telescopic end is fixedly connected to the telescopic end of the electric telescopic rod (22). The sample outlet (24) is located at the end of the telescopic tube (23) away from the sampling tube (13). Multiple sets of sealing caps (25) are provided, and multiple sets of sealing caps (25) are respectively located at the openings of multiple sets of sample bottles (21). The rotation switching component (3) is located on the inner bottom wall of the sampling box (15) and is used to rotate and switch multiple sets of sample bottles (21). The rinsing component (4) is located in the placement box (16) and is used to rinse the sampling tube (13).

3. The sampling device for electroplating wastewater according to claim 2, characterized in that: The rotary switching assembly (3) includes a drive motor (31), an indexing turntable (32), and an indexing wheel (33). The drive motor (31) is located at the lower end of the cabinet (17), and its output end passes through the sampling box (15). The indexing wheel (33) is located on the output end of the drive motor (31). The indexing turntable (32) is rotatably located on the inner bottom wall of the sampling box (15) and meshes with the indexing wheel (33). The upper end of the indexing turntable (32) has multiple sets of placement slots (34), and multiple sets of sample bottles (21) are placed in the multiple sets of placement slots (34).

4. The sampling device for electroplating wastewater according to claim 2, characterized in that: The rinsing component (4) includes a water storage tank (41) and a drain pipe (42). The water storage tank (41) is located inside the placement box (16), and its outlet end is connected to the end of the sampling tube (13) away from the outlet pipe (11). The drain pipe (42) is connected to the end of the sampling tube (13) near the outlet pipe (11). Both the outlet end of the water storage tank (41) and the drain pipe (42) are equipped with drain valves (43).

5. The sampling device for electroplating wastewater according to claim 1, characterized in that: The placement box (16) is equipped with a first liquid storage tank (5) and a second liquid storage tank (51), both of which are connected to the end of the sampling tube (13) away from the water outlet pipe (11). The first liquid storage tank (5) contains sodium hydroxide solution, and the second liquid storage tank (51) contains nitric acid solution. The first liquid storage tank (5) is equipped with a first valve (52) at the outlet end, and the second liquid storage tank (51) is equipped with a second valve (53) at the outlet end.

6. The sampling device for electroplating wastewater according to claim 1, characterized in that: The sampling tube (13) has multiple sets of rotating rods (6) arranged at intervals on its inner peripheral wall, and multiple sets of scrapers (61) arranged at intervals on the outer peripheral wall of the multiple sets of rotating rods (6).

7. The sampling device for electroplating wastewater according to claim 1, characterized in that: A thermostat (7) is provided on one side of the cabinet (17) to keep the sampling box (15) at a constant temperature.

8. The sampling device for electroplating wastewater according to claim 1, characterized in that: A controller (8) is provided on the side wall of the placement box (16).

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