Circuit board pickling apparatus and pickling method thereof

Abstract

The application discloses a kind of circuit board pickling equipment and pickling method, belong to wastewater recovery processing technical field, wherein pickling equipment includes sedimentation tank, further include: mixing component, including mixing cavity, mixing cavity is communicated with air pipe and spray pipe, bottom is provided with drain port;Drive component, including column cavity and the first drive rod being guided and being arranged at one end of column cavity, column cavity includes liquid inlet and liquid outlet, liquid inlet is communicated with drain port;Heat exchange component is set in sedimentation tank, and is connected with the upper end of first drive rod, and heat exchange component is formed with the heat exchange flow channel being communicated with liquid outlet in inside;Drive component is configured as: when liquid flows through column cavity by mixing component, the first drive rod can be driven to reciprocate along axial direction, to drive heat exchange component to move, by the above setting mode, heat exchange component is driven to reciprocate in vertical direction using acid mist to treat the heat generated in acid-base neutralization and waste water heat exchange, and disturb waste water, improve the processing efficiency of waste water.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of wastewater recycling treatment, and in particular to a circuit board pickling device and a pickling method thereof. BACKGROUND

[0002] During the circuit board pickling process, pickling wastewater containing metal ions is generated, and direct discharge of the wastewater will cause serious environmental pollution. Currently, the common method is to add a reagent to the wastewater to react with the metal ions to generate precipitates, thereby achieving the effect of wastewater treatment.

[0003] The sedimentation tank is a commonly used device for precipitating precipitates in wastewater, and improving the sedimentation efficiency is a key effective means for improving the wastewater treatment efficiency and treatment effect of the sedimentation tank. Therefore, there are a large number of technologies for improving the sedimentation efficiency in the prior art. For example, a pickling wastewater treatment device is disclosed in Chinese Patent Application No. 2024116427513, which uses a technology for reducing the short flow and turbulent flow of water in the sedimentation tank, improving the mixing uniformity of the flocculant and wastewater by mixing, and improving the sedimentation effect. This technology is beneficial to the flocculation of the precipitates in the wastewater, but it only improves the mixing uniformity of the reagent and wastewater and prolongs the residence time of the wastewater in the first sedimentation tank, and has little effect on the reaction rate of the reagent and the metal ions in the wastewater.

[0004] During the wastewater flocculation process, appropriately increasing the temperature of the wastewater and appropriately stirring and disturbing are beneficial to improving the reaction of the reagent and the wastewater, and thus effectively improving the flocculation speed in the wastewater. During the actual pickling process of the circuit board, a large amount of acid mist is generated above the pickling tank. Currently, the method for treating the acid mist is to use a negative pressure fan to suck the acid mist and remove the acid mist in the exhaust gas by spraying alkali solution. Since the reaction of the acid mist with the sprayed alkali solution generates heat, the heat is directly lost at present. Therefore, it is of great significance to utilize the heat generated during the removal of the acid mist to heat the sedimentation tank and improve the flocculation effect. SUMMARY

[0005] The present application aims to solve the above problems and provide a circuit board pickling device and a pickling method thereof.

[0006] To achieve the above-mentioned purpose, the technical solution of the present application is as follows: a circuit board pickling device, comprising a sedimentation tank, further comprising:

[0007] A mixing assembly comprising a mixing chamber, the mixing chamber being connected with an air pipe and a spraying pipe, and a liquid discharge port being arranged at the bottom of the mixing chamber;

[0008] A driving assembly comprising a columnar chamber and a first driving rod arranged at one end of the columnar chamber, the columnar chamber comprising a liquid inlet and a liquid outlet, and the liquid inlet being connected with the liquid discharge port;

[0009] The heat exchange assembly is arranged in the sedimentation tank and connected with the upper end of the first driving rod, and a heat exchange flow channel is formed in the heat exchange assembly and communicated with the liquid outlet.

[0010] The driving assembly is configured to drive the first driving rod to reciprocate along the axial direction to drive the heat exchange assembly to move when the liquid flows through the columnar cavity from the mixing assembly.

[0011] Further, the columnar cavity and the first driving rod are vertically arranged, the first driving rod is internally provided with an internal passage, and the liquid outlet is a port of the internal passage.

[0012] Further, the driving assembly further comprises:

[0013] The driving plate is slidingly and guidingly arranged in the columnar cavity and connected with the first driving rod, and the passage is penetratingly arranged on the driving plate;

[0014] The elastic member is arranged between the columnar cavity and the driving plate and used for providing the driving plate with downward elastic force;

[0015] The communication assembly is arranged between the columnar cavity and the liquid inlet and linked with the driving plate to change the flow area when the driving plate reciprocates.

[0016] Further, the liquid inlet is arranged below the driving plate, the first driving rod is guidingly arranged at the upper end of the columnar cavity, the elastic member is a compression spring, and the two ends of the compression spring are respectively abutted with the driving plate and the upper end of the columnar cavity.

[0017] Further, the communication assembly comprises:

[0018] The second driving rod is connected with the lower surface of the driving plate, the two ends of the second driving rod are respectively provided with the second port and the third port, and the second driving rod is internally provided with a flow channel communicating the second port and the third port;

[0019] The matching member is arranged at the lower end of the columnar cavity and internally provided with a chamber communicated with the liquid inlet, and the upper end of the chamber is provided with a guide hole sealingly and guidingly matched with the second driving rod;

[0020] The shielding member is arranged on the second driving rod and capable of switching between the states of opening and shielding the third port.

[0021] Further, the matching member is a columnar member, the columnar member is insertedly matched with the lower end of the columnar cavity, and at least one of the first driving rod and the second driving rod is detachably and fixedly connected with the driving plate.

[0022] Further, the liquid inlet is arranged on the side wall of the columnar member, the columnar cavity is provided with a second liquid pipe corresponding to the liquid inlet, the lower end of the columnar member is provided with a rim plate, the rim plate is provided with at least one positioning portion, and the side wall of the columnar cavity is provided with a second positioning portion corresponding to the positioning portion.

[0023] Further, the upper end of the columnar piece is provided with a groove, and the opening of the groove is detachably sealed with a flange plate, and the second driving rod is in guided plug-in fit with the flange plate.

[0024] Further, the heat exchange assembly comprises:

[0025] A communication pipe is rigidly arranged and connected with the first driving rod;

[0026] A support frame is connected with the communication pipe;

[0027] A plurality of heat exchange pipes are connected with the support frame, and the heat exchange pipes are in communication with the communication pipe, and the density of the support frame is less than the density of the pickling solution.

[0028] Further, the application also provides a circuit board pickling method, which is performed by using the circuit board pickling device.

[0029] Step one, pickling the components, and collecting the pickling waste gas containing acid mist during the pickling process;

[0030] Step two, conveying the waste gas to the mixing assembly of the pickling tank, mixing the waste gas with the lye through the mixing assembly, and releasing heat during the mixing process;

[0031] Step three, conveying the liquid in the mixing assembly to flow through the driving assembly to the heat exchange assembly, driving the driving assembly to reciprocate by the liquid, driving the heat exchange assembly to reciprocate, disturbing the waste water in the sedimentation tank, and heating the waste water by the liquid through the heat exchange assembly.

[0032] Compared with the prior art, the circuit board pickling device and the pickling method have the following beneficial effects: the acid mist generated during pickling is introduced into the mixing assembly, and then the mixed fluid is sequentially introduced into the driving assembly and the heat exchange assembly. The heat generated by the neutralization of acid and alkali in the fluid is exchanged with the waste water through the heat exchange pipe. When the fluid flows through the driving assembly, the first driving rod can be driven to reciprocate in the axial direction, and the heat exchange assembly can be driven to reciprocate in the vertical direction to disturb the waste water, thereby improving the generation efficiency of the flocculation in the waste water, improving the treatment efficiency of the waste water, and effectively utilizing the waste heat generated during the treatment of the acid mist waste gas. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 It is a schematic diagram of the overall structure of the circuit board pickling device.

[0034] Figure 2 It is a schematic diagram of the bottom structure of the circuit board pickling device.

[0035] Figure 3 It is a schematic diagram of the structure of the circuit board pickling device hidden liquid tank.

[0036] Figure 4 A top view structural schematic diagram of a circuit board pickling equipment of the present application.

[0037] Figure 5 A structure schematic diagram of the connection of the heat exchange assembly, the driving assembly and the mixing assembly in an embodiment of the circuit board pickling equipment of the present application Figure 1 .

[0038] Figure 6 A structure schematic diagram of the connection of the heat exchange assembly, the driving assembly and the mixing assembly in an embodiment of the circuit board pickling equipment of the present application Figure 2 .

[0039] Figure 7 A sectional view structural schematic diagram of the connection of the heat exchange assembly, the driving assembly and the mixing assembly in an embodiment of the circuit board pickling equipment of the present application.

[0040] Figure 8 An internal structure schematic diagram of the connection of the mixing assembly in an embodiment of the circuit board pickling equipment of the present application.

[0041] Figure 9 A structure schematic diagram of the driving assembly in an embodiment of the circuit board pickling equipment of the present application.

[0042] Figure 10 A sectional view structural schematic diagram of the driving assembly in an embodiment of the circuit board pickling equipment of the present application Figure 1 .

[0043] Figure 11 A sectional view structural schematic diagram of the driving assembly in an embodiment of the circuit board pickling equipment of the present application Figure 2 .

[0044] Figure 12 A connection structure schematic diagram of the cooperating piece, the driving plate, the first driving rod and the second driving rod in an embodiment of the circuit board pickling equipment of the present application.

[0045] Figure 13 A structure schematic diagram of the second driving rod, the flange plate and the driving plate in the first state in an embodiment of the circuit board pickling equipment of the present application.

[0046] Figure 14 A structure schematic diagram of the second driving rod, the flange plate and the driving plate in the second state in an embodiment of the circuit board pickling equipment of the present application.

[0047] Figure 15 A connection structure schematic diagram of the second driving rod, the flange plate and the driving plate end in an embodiment of the circuit board pickling equipment of the present application.

[0048] Figure 16 Figure 1 is a schematic view of the end plate structure of an embodiment of the acid pickling equipment for circuit board.

[0049] Figure 17 Figure 2 is a schematic view of the valve structure of an embodiment of the acid pickling equipment for circuit board.

[0050] In the figure: 1, a sedimentation tank; 10, a tank body; 2, a liquid tank; 20, a first liquid pipe; 21, a pump body; 3, a driving assembly; 30, a shell; 300, a columnar cavity; 31, a first driving rod; 310, a first flange joint; 311, an internal passage; 3110, a liquid outlet; 312, a first port; 313, a valve; 3130, a flow-through groove; 3131, a first taper surface; 32, a matching piece; 320, a flange plate; 321, a groove body; 322, a liquid inlet; 323, a positioning portion; 33, a compression spring; 34, a driving plate; 340, a passage; 35, a second driving rod; 350, a second port; 351, a third port; 36, an end plate; 360, a containing groove; 361, a permanent magnet; 37, a sleeve body; 38, a second elastic piece; 4, a mixing assembly; 40, a mixing cavity; 401, a liquid discharge port; 41, a spray pipe; 410, a spray head; 42, an air pipe; 43, a second liquid pipe; 5, a heat exchange assembly; 50, an output pipe; 51, a flexible pipe; 52, a heat exchange pipe; 520, a first ring pipe; 5201, a core pipe; 521, a second ring pipe; 522, a communication pipe; 5220, a second flange joint; 53, a support frame. DETAILED DESCRIPTION

[0051] The application will now be described in further detail with reference to the drawings. The drawings are simplified schematic views which only show the basic structure of the application in a schematic manner, and thus only show the components relevant to the application.

[0052] Embodiment 1

[0053] Please refer to Figures 1-7 The technical solution of the application is: an acid pickling equipment for circuit board, comprising a sedimentation tank 1, further comprising:

[0054] a mixing assembly 4, comprising a mixing cavity 40, the mixing cavity 40 being communicated with an air pipe 42 and a spray pipe 41, and being provided with a liquid discharge port 401 at the bottom;

[0055] a driving assembly 3, comprising a columnar cavity 300 and a first driving rod 31 which is arranged in a guiding manner at one end of the columnar cavity 300, the columnar cavity 300 comprising a liquid inlet 322 and a liquid outlet 3110, the liquid inlet 322 being communicated with the liquid discharge port 401;

[0056] a heat exchange assembly 5, arranged in the sedimentation tank 1, connected with the upper end portion of the first driving rod 31, and having a heat exchange flow channel formed inside, which is communicated with the liquid outlet 3110.

[0057] The driving assembly 3 is configured to drive the first driving rod 31 to reciprocate along the axial direction to drive the heat exchange assembly 5 to move when the liquid flows through the columnar cavity 300 by the mixing assembly 4.

[0058] Specifically, as a specific embodiment, the pickling equipment provided by the present application comprises an acid mist collecting unit (not shown in the figure) arranged above the pickling tank, wherein the acid mist collecting unit is a commonly used technology in the field of pickling, which collects the acid mist above the pickling tank by using the principle of negative pressure suction. In the present application, the acid mist collecting unit (not shown in the figure) uses the commonly used technology in the field, which will not be described here. Those skilled in the art should understand.

[0059] Reference Figures 1-4 The structure of the sedimentation tank 1 is basically consistent with the prior art, and a plurality of tank bodies 10 are formed by a partition plate, and the plurality of tank bodies 10 form a plurality of sedimentation zones. The present application is provided with a mixing assembly 4, a driving assembly 3 and a heat exchange assembly 5 in the tank body 10 corresponding to the first stage sedimentation zone. Reference Figure 5 、 Figure 8 The heat exchange assembly 5 is driven in cooperation with the driving assembly 3. The mixing assembly 4 comprises a body arranged vertically, and a mixing cavity 40 is formed in the body. A spray head 410 is arranged at the top of the mixing cavity 40, and the spray head 410 is communicated with a spray pipe 41. An air pipe 42 is communicated with the side wall of the mixing cavity 40, and the air pipe 42 is communicated with the acid mist collecting unit. Reference Figure 1 、 Figure 2It also includes a liquid tank 2, which is used to prepare alkaline solution. The liquid tank 2 is connected to a pump body 21 through a first liquid pipe 20. The output end of the pump body 21 is connected to a spray pipe 41. During operation, the sedimentation tank 1 processes the previous batch of pickling waste liquid. During the processing, when the circuit board is pickled, the acid mist collected by the acid mist collection unit (not shown in the figure) can be pumped to the mixing component 4. When waste gas is pumped to the mixing component 4, the pump body 21 also starts to work, pumping alkaline solution to the mixing component 4. The alkaline solution is sprayed by the spray head 410 and mixed with the waste gas, and comes into contact with the acid mist and mixes with the acid to carry out a preliminary reaction, releasing a certain amount of heat. Due to the pumping pressure of the pump body 21 and the gas pressure of the airflow, the mixing chamber 40 has a pressure greater than that of the previous batch. The positive pressure of atmospheric pressure allows the mixed liquid and gas to be discharged from the drain port 401 together, and then transported to the drive assembly 3. The liquid enters through the inlet 322 of the drive assembly 3, passes through the columnar cavity 300 and is discharged through the outlet 3110. The alkaline solution and acid react further and release heat, and then flow into the heat exchange assembly 5. After mixing in the heat exchange assembly 5, they react further and release heat. They exchange heat with the wastewater through the heat exchange tube 52. When flowing through the drive assembly 3, it can drive the first drive rod 31 to reciprocate axially, and drive the heat exchange assembly 5 to reciprocate vertically to disturb the wastewater, thereby improving the flocculation efficiency in the wastewater and improving the wastewater treatment efficiency. The specific structure and working principle of the drive assembly 3 are described below.

[0060] Furthermore, as a specific implementation method, refer to Figure 7 , Figures 9-11 The cylindrical cavity 300 and the first driving rod 31 are both vertically arranged. The first driving rod 31 is provided with an internal channel 311, and the liquid outlet 3110 is the port of the internal channel 311.

[0061] Specifically, the drive assembly 3 includes a vertically arranged outer shell 30 with a cylindrical cavity 300 inside. A first drive rod 31 is coaxially guided at the upper end of the outer shell 30. An internal channel 311 is provided at the upper end of the first drive rod 31, and a first port 312 is connected at the lower end of the internal channel 311. The first port 312 passes through the side wall of the first drive rod 31 and communicates with the cylindrical cavity 300. A first flange joint 310 is provided at the upper end of the first drive rod 31, and a second flange joint 5220 is provided, which is detachably and fixedly connected to the upper end of the first drive rod 31. While connected, it can communicate with the upper port of the internal channel 311. This communication structure is simpler and more convenient, facilitating the assembly and disassembly of the drive assembly 3 and the heat exchange assembly 5, and also facilitating the connection of the liquid circuit.

[0062] Furthermore, as a specific implementation method, please continue to refer to... Figures 8-11 The driving component 3 further includes:

[0063] A driving plate 34 is arranged in the cylindrical cavity 300 in sliding guide cooperation with the first driving rod 31, and a passage 340 is arranged through the driving plate 34;

[0064] An elastic member is arranged between the cylindrical cavity 300 and the driving plate 34, and is used for providing the driving plate 34 with a downward elastic force;

[0065] A communication assembly is arranged between the cylindrical cavity 300 and the liquid inlet 322, and is linked with the driving plate 34 in linkage cooperation, and can change the flow area when the driving plate 34 reciprocates.

[0066] Specifically, the shell 30 is arranged at the bottom of the sedimentation tank 1, and a driving plate 34 is guided and matched inside the shell 30. The driving plate 34 is connected with the lower end of the first driving rod 31. The liquid inlet 322 is located below the driving plate 34. The channel 340 is arranged through the driving plate 34. The flow area S0 of the channel 340 is smaller than the cross-sectional area S1 of the internal channel 311. The elastic member can provide a downward elastic force to the driving plate 34. In operation, the fluid is transported from the mixing assembly 4 to the liquid inlet 322 through the second liquid pipe 43, and then flows through the communication assembly into the cylindrical cavity 300. The communication assembly is linked and matched with the driving plate 34. Under the action of the elastic force of the elastic member, when the driving plate 34 is in the initial state of abutting against the bottom of the cylindrical cavity 300, the communication assembly is in the state S2 of the maximum flow area, wherein S2≥S1. At this time, the fluid flows through the communication assembly. In operation, the supply flow of the flow assembly is greater than or equal to the rated flow of the communication assembly in the maximum flow area. At this time, the fluid enters the cylindrical cavity 300 and then flows through the channel 340 of the driving plate 34. Since S2>S0, the flow rate of the fluid flowing into the lower part of the driving plate 34 is greater than the flow rate of the fluid flowing through the driving plate 34 at this time, so that the pressure in the lower part of the driving plate 34 increases, and the driving plate 34 is subjected to an increased fluid pressure. Under the action of the pressure, the driving plate 34 moves upward against the elastic force of the elastic member. When the driving plate 34 moves upward, the first driving rod 31 is pushed to move upward, thereby achieving the effect of upward driving. The fluid flowing through the channel 340 flows out of the cylindrical cavity 300 through the internal channel 311 and the liquid outlet 3110, and then flows into the heat exchange assembly 5. In the process of movement, the flow area of the communication assembly changes and switches to the minimum state S3, wherein S3 is smaller than the flow area S0 of the channel 340, so that the flow rate of the fluid flowing into the cylindrical cavity 300 decreases. At this time, the fluid flowing into the lower part of the driving plate 34 through the channel 340 has a higher speed than the fluid flowing into the lower part of the driving plate 34 through the liquid inlet 322, so that the pressure difference between the two sides of the driving plate 34 decreases. At this time, under the action of the elastic force of the elastic member, the driving plate 34 moves downward. In the process of moving downward, the flow area of the communication assembly changes again to the maximum state S2. In this way, the driving plate 34 is reciprocally driven, and in the process of reciprocally driving, the fluid in the cylindrical cavity 300 is disturbed and mixed, the mixing effect of the fluid is further improved, and the alkali liquor and the acid mist are fully reacted and heated.

[0067] Further, with reference to Figure 10 、 Figure 11The liquid inlet 322 is arranged below the driving plate 34, and the first driving rod 31 is guided to be arranged at the upper end of the columnar cavity 300; the elastic member is a compression spring 33, and two ends thereof are respectively in abutment with the driving plate 34 and the upper end of the columnar cavity 300.

[0068] Further, referring to Figure 10 、 Figure 17 A blind groove is coaxially arranged at the upper end of the first driving rod 31 and the internal passage 311, and a valve 313 is arranged in the blind groove; by arranging the valve 313, the valve 313 can be placed at the bottom of the blind groove under the action of its own gravity, at this time, the first taper surface 3131 of the valve 313 is in abutment with the taper surface at the bottom of the blind groove, so that the fluid can not pass through the internal passage 311 from top to bottom; when the fluid passes through the internal passage 311 from bottom to top, the fluid pushes the valve 313 upward to be separated from the taper surface at the bottom of the blind groove, at this time, the fluid can pass through the flow-through groove 3130 on the side wall of the valve 313, so that the one-way conduction effect is formed; and in this way, the mixing of the liquid is further facilitated, and the mixing reaction of the acid and the alkali is further facilitated.

[0069] Embodiment two

[0070] Please refer to Figures 12-16 The application provides a circuit board pickling equipment, and further, the specific structure of the communication assembly is as follows:

[0071] The second driving rod 35 is connected with the lower surface of the driving plate 34, and two ends thereof are respectively provided with a second port 350 and a third port 351, and an internal flow channel for communicating the second port 350 and the third port 351 is arranged;

[0072] The matching piece 32 is arranged at the lower end of the columnar cavity 300, and an internal cavity chamber for communicating with the liquid inlet 322 is arranged, and the upper end of the cavity chamber is provided with a guide hole for sealingly guiding and matching with the second driving rod 35;

[0073] The shielding piece is arranged on the second driving rod 35 and can be switched between the states of opening and shielding the third port 351.

[0074] Specifically, referring to Figures 9-11The lower part of the shell 30 is open, and the bottom is inserted into the matching columnar matching part 32. The outer periphery of the matching part 32 is in sealing cooperation with the inner periphery of the columnar cavity 300, and a columnar cavity is formed in the matching part 32. The second driving rod 35 is arranged on the lower surface of the driving plate 34, and the lower end is inserted into the cavity. The second driving rod 35 is hollow, and the upper end below the driving plate 34 is provided with a second port 350, and the lower end extending into the cavity is provided with a third port 351. The flow area of the third port 351 and the second port 350 is equal. The side wall of the cavity is provided with a liquid inlet 322. As a specific embodiment, the shielding part corresponds to the third port 351, is arranged in the cavity, and can drive the second driving rod 35 to move when the driving plate 34 moves axially, so that the shielding part can switch between the two states of opening the third port 351 and shielding the third port 351. Referring to Figure 10 、 Figure 13 At this time, the shielding part shields the third port 351, and referring to Figure 14 At this time, the shielding part leaves the third port 351 and opens the third port 351.

[0075] Specifically, the shielding part is arranged as follows: an end plate 36 is arranged at the lower end of the second driving rod 35, and a permanent magnet 361 is arranged on the side of the end plate 36 close to the shielding part. The shielding part is a sleeve 37 slidingly arranged outside the second driving rod 35. The sleeve 37 is magnetically attracted to the permanent magnet 361 or is provided with a magnet magnetically attracted to the permanent magnet 361. When the permanent magnet 361 magnetically attracts the shielding part, the shielding part abuts against the end plate 36, which can completely or partially shield the third port 351. At this time, the flow area of the connecting assembly is in the minimum state. The end plate 36 is provided with a containing groove 360, and the permanent magnet 361 is arranged in the containing groove 360.

[0076] Specifically, a second elastic part 38 is arranged between the upper end of the cavity and the shielding part, which can provide upward elastic force to the shielding part. When the shielding part is separated from the permanent magnet 361, the shielding part can be in the shielding state under the action of the elastic force of the second elastic part 38. Figure 14In the state shown, the flow area is maximum, and in operation, the fluid flows into the cylindrical cavity 300 through the third port 351 and the second port 350, pushing the driving plate 34 to move upward, and then the driving plate 34 drives the second driving rod 35 to move upward, and the distance between the end plate 36 and the shielding piece becomes smaller, and the magnetic attraction between the permanent magnet 361 and the shielding piece increases, and the shielding piece gradually shields the third port 351, and the magnetic attraction between the permanent magnet 361 and the shielding piece is controlled to ensure that the shielding piece is stretched to move toward the end plate 36 to abut against the end plate 36 under the magnetic attraction when the third port 351 is shielded by about 1 / 2, and 1 / 2S2≥S0, and the shielding piece is in magnetic attraction with the permanent magnet 361, and at this time, the shielding piece shields the third port 351, and the communication assembly is in the state of minimum flow, and at this time, the driving plate 34 is pushed downward by the elastic force of the compression spring 33, and in the process of moving downward, the shielding piece is driven to move together under the magnetic force of the permanent magnet 361 until the shielding piece moves to the position shown in the figure, and at this time, the shielding piece remains in the state of shielding the third port 351 and stretches the second elastic member 38 to increase the elastic force of the second elastic member 38, and at this time, the driving plate 34 is spaced apart from the end portion of the cooperating piece 32 by a certain distance, and at this time, the second elastic member 38 reaches the maximum stretching amount or the elastic force of the second elastic member 38 is equal to the magnetic attraction between the permanent magnet 361 and the shielding piece, and as the driving plate 34 continues to move, the shielding piece is separated from the end plate 36 and returns to the state shown in the figure under the elastic force, and at this time, the communication assembly switches to the state of maximum flow area, and the driving plate 34 moves upward, and the reciprocating movement is repeated. Figure 10 Figure 14

[0077] As a specific embodiment, the second elastic member 38 can be a tension spring made of an acid and alkali resistant alloy material such as 0Cr17Mn13N, 0Cr20Ni24Si4Ti, 1Cr12Ni4Mn5Mo3Al, or a rubber ring made of fluororubber or ethylene propylene terpolymer rubber, so as to adapt to the working environment.

[0078] As a specific embodiment, the driving plate 34 and the first driving rod 31 are detachably connected and matched through threads, the second driving rod 35 and the driving plate 34 are integrally arranged through welding, and the end plate 36 and the lower end portion of the second driving rod 35 are connected through threads. Figure 11

[0079] Further, as a preferred embodiment, the driving plate 34 and the first driving rod 31 are detachably connected and matched through threads, the second driving rod 35 and the driving plate 34 are integrally arranged through welding, and the end plate 36 and the lower end portion of the second driving rod 35 are connected through threads. Figure 12 ​​​The liquid outlet 3110 is arranged on the sidewall of the columnar member, the columnar cavity 300 is provided with a second liquid pipe 43 corresponding to the liquid outlet 3110, and the lower end of the columnar member is provided with a rim plate, the rim plate is provided with at least one positioning portion 323, and the sidewall of the columnar cavity 300 is provided with a second positioning portion corresponding to the positioning portion 323. Specifically, by arranging the fitting member 32 as a columnar structure matched with the columnar cavity 300, the fitting member 32 and the columnar cavity 300 are detachably matched in a plug-in manner, so that the subsequent maintenance of the driving assembly 3 is facilitated, and adaptively, the liquid inlet 322 is arranged on the sidewall of the fitting member 32, and the second liquid pipe 43 is communicated on the sidewall of the shell 30. In order to ensure the corresponding matching of the liquid inlet 322 and the second liquid pipe 43, refer to Figure 11 、 Figure 12 The end of the fitting member 32 is provided with a rim plate, the rim plate is provided with a positioning protrusion, and a positioning groove matched with the positioning protrusion in plug-in manner is arranged on the fitting member 32, so that the fitting member 32 and the shell 30 can be positioned by the positioning protrusion, and the liquid inlet 322 and the second liquid pipe 43 are corresponded.

[0080] Further, as a preferred embodiment, refer to Figure 10 、 Figure 11 In order to ensure that the upper end of the columnar member is provided with a groove body 321, the opening of the groove body 321 is detachably and sealingly matched with a flange plate 320, and the second driving rod 35 is guided and matched in plug-in manner with the flange plate 320. By arranging the groove body 321 at the end of the columnar member, the end of the groove body 321 is detachably and fixedly connected with the flange plate 320, so that a cavity is formed between the flange plate 320 and the groove body 321, and the second driving rod 35 is guided and sealingly matched with the through hole in the flange plate 320. This matching mode is convenient for assembly and subsequent maintenance.

[0081] Specifically, hooks are arranged on the flange plate 320 and the shielding member, and the two ends of the second elastic member 38 are hung and matched with the two hooks.

[0082] Further, refer to Figure 10 At the bottom of the groove body 321 of the fitting member 32, a through hole is arranged, and specifically in use, the through hole can be externally connected with a pipeline, and a control valve is further arranged on the pipeline, and the control valve is in a normally closed state. When there is no acid mist treatment, the accumulated liquid in the groove body 321 can be discharged by opening the control valve.

[0083] Further, the fitting member 32 is a columnar member, which is matched in plug-in manner with the lower end of the columnar cavity 300, and at least one of the first driving rod 31 and the second driving rod 35 is detachably and fixedly connected with the driving plate 34.

[0084] Embodiment three

[0085] Please refer to Figures 5-7The application provides a circuit board pickling equipment, as an embodiment, the heat exchange assembly 5 comprises:

[0086] The communication pipe 522 is rigidly arranged and connected with the first guide rod;

[0087] The support frame 53 is connected with the communication pipe 522;

[0088] The heat exchange pipe 52 is connected with the support frame 53, the heat exchange pipe 52 is communicated with the communication pipe 522, and the density of the support frame 53 is less than that of the pickling liquid.

[0089] Specifically, the first ring pipe 520 and the second ring pipe 521 are arranged on the upper and lower sides of the communication pipe 522, a plurality of heat exchange pipes 52 are arranged between the first ring pipe 520 and the second ring pipe 521, the two ends of the heat exchange pipe 52 are communicated with the first ring pipe 520 and the second ring pipe 521 respectively, the communication pipe 522 has a U-shaped structure, a second flange joint 5220 is arranged in the middle region and connected with the upper end of the first drive rod 31, the communication pipe 522 is welded with a hollow pipe body to form a support frame 53, the hollow pipe is not communicated with the heat pipe inside, through the setting mode, the hollow pipe can float in the wastewater, the buoyancy provided by the heat exchange assembly 5 is reduced, so that the driving force of the driving assembly 3 upward is reduced, and it is ensured that the driving assembly 3 can effectively drive the heat exchange assembly 5 to move upward.

[0090] Further, referring to Figure 7 The first ring pipe 520 and the second ring pipe 521 are made of corrosion-resistant heat-conducting technical materials, and the hollow core pipe 5201 is arranged inside the first ring pipe 520 and the second ring pipe 521 along the extension direction, the core pipe 5201 is a thin-walled part, through this mode, the core pipe 5201 occupies the internal space of the ring pipe, when the fluid flows, the space occupied by the fluid in the ring pipe is reduced, so that the buoyancy of the whole heat exchange assembly 5 is less than its own gravity, and the difference is small, which is more beneficial to the movement of the driving assembly 3 driving the heat exchange assembly 5, and through this setting mode, when the heat exchange assembly 5 reciprocates up and down, the resistance of the wastewater is received, so that the reciprocating frequency is low, the disturbance effect is small, and the problem that the disturbance is too fast and is not conducive to flocculation can be effectively avoided.

[0091] Further, the second ring pipe 521 is connected with the corrugated flexible pipe 51, the other end of the flexible pipe 51 is connected with the output pipe 50, and the output pipe 50 is communicated with the liquid tank 2 and extends out of the side wall of the sedimentation tank.

[0092] It should be noted that the above specific structure of the heat exchange assembly 5 is only exemplary, and in the actual application process, the structure can be modified according to the flow characteristics of the fluid and the internal space of the sedimentation tank.

[0093] Example four

[0094] The application also provides a circuit board pickling method, in operation, using the circuit board pickling equipment of any one of the embodiments 1, 2 and 3, comprising the following steps:

[0095] Step 1, pickling the components, collecting the pickling waste gas containing acid mist in the pickling process;

[0096] Step 2, conveying the waste gas to the mixing assembly 4 of the pickling tank, mixing the waste gas with the lye through the mixing assembly 4, and releasing heat in the mixing process;

[0097] Step 3, conveying the liquid in the mixing assembly 4 to flow through the driving assembly 3 to the heat exchange assembly 5, driving the driving assembly 3 to reciprocate by the liquid, driving the heat exchange assembly 5 to reciprocate, disturbing the waste water in the sedimentation tank 1, and heating the waste water by the liquid through the heat exchange assembly 5.

[0098] In the above manner, the heat generated in the treatment of pickling acid mist can be effectively utilized to promote the sedimentation efficiency in the sedimentation tank, and the energy can be effectively utilized, having the beneficial effect of saving energy.

[0099] Obviously, the above embodiments are only examples for clearly illustrating, and are not intended to limit the embodiments. Based on the above description, other different forms of changes or variations can be made by those skilled in the art. Here, all the embodiments need not and cannot be exhausted. The obvious changes or variations derived therefrom are still within the protection scope of the present application.

Claims

1. A circuit board pickling apparatus comprising a sedimentation basin (1), characterized in that, Also include: The mixing assembly (4) includes a mixing cavity (40), the mixing cavity (40) is communicated with the trachea (42) and the spray pipe (41), the bottom is provided with the drain port (401); The driving assembly (3) includes a cylindrical cavity (300) and a first driving rod (31) guided to one end of the cylindrical cavity (300), the cylindrical cavity (300) includes a liquid inlet (322) and a liquid outlet (3110), the liquid inlet (322) is communicated with the drain port (401); The heat exchange assembly (5) is arranged in the sedimentation tank (1), is connected with the upper end of the first driving rod (31), and the heat exchange assembly (5) is formed with a heat exchange flow channel communicated with the liquid outlet (3110); The driving assembly (3) is configured to drive the first driving rod (31) to reciprocate along the axial direction to drive the heat exchange assembly (5) to move when the liquid flows through the cylindrical cavity (300) by the mixing assembly (4); The cylindrical cavity (300) and the first driving rod (31) are vertically arranged, the first driving rod (31) is provided with an internal passage (311), and the liquid outlet (3110) is a port of the internal passage (311); The driving assembly (3) further includes: The driving plate (34) is slidingly guided and matched to be arranged in the cylindrical cavity (300) and is connected with the first driving rod (31), and the driving plate (34) is provided with a passage (340) penetrating therethrough; The elastic member is arranged between the cylindrical cavity (300) and the driving plate (34) and is used for providing downward elastic force to the driving plate (34); The communication assembly is arranged between the cylindrical cavity (300) and the liquid inlet (322) and is linked with the driving plate (34) to change the flow area when the driving plate (34) reciprocates; The liquid inlet (322) is arranged below the driving plate (34), and the first driving rod (31) is guided to the upper end of the cylindrical cavity (300); the elastic member is a compression spring (33), and the two ends are respectively abutted with the driving plate (34) and the upper end of the cylindrical cavity (300); The communication assembly includes: The second driving rod (35) is connected with the lower surface of the driving plate (34) and is provided with a second port (350) and a third port (351) at two ends, and is provided with a flow channel communicated with the second port (350) and the third port (351) in the inside; The matching member (32) is arranged at the lower end of the cylindrical cavity (300) and is provided with a chamber communicated with the liquid inlet (322) in the inside, and the upper end of the chamber is provided with a guide hole in sealing and guiding cooperation with the second driving rod (35); The shielding member is arranged on the second driving rod (35) and can switch between the states of opening and shielding the third port (351). An end plate is arranged at the lower end of the second driving rod, and a permanent magnet is arranged on the side of the end plate close to the shielding piece. The shielding piece is a sleeve body arranged outside the second driving rod in a sliding manner. The sleeve body is magnetically attracted to the permanent magnet or is provided with a magnet that is magnetically attracted to the permanent magnet. When the permanent magnet is magnetically attracted to the shielding piece, the shielding piece abuts against the end plate. At this time, the third port can be completely or partially shielded, and the flow area of the communication assembly is in a minimum state. A second elastic member is arranged between the upper end of the chamber and the shielding piece, and the second elastic member can provide an upward elastic force to the shielding piece.

2. The circuit board pickling apparatus according to claim 1, wherein The fitting piece (32) is a columnar piece that is inserted and matched with the lower end of the columnar cavity (300). At least one of the first driving rod (31) and the second driving rod (35) is detachably fixedly connected with the driving plate (34).

3. The circuit board pickling apparatus according to claim 2, wherein The liquid inlet (322) is arranged on the side wall of the columnar piece. A second liquid pipe (43) corresponding to the liquid inlet (322) is arranged on the columnar cavity (300). The lower end of the columnar piece is provided with a rim plate. The rim plate is provided with at least one positioning portion (323). The side wall of the columnar cavity (300) is provided with a second positioning portion corresponding to the positioning portion (323).

4. The circuit board pickling apparatus according to claim 3, wherein The upper end of the columnar piece is provided with a groove (321). The opening of the groove (321) is detachably and sealingly matched with a flange plate (320). The second driving rod (35) is guided and inserted and matched with the flange plate (320).

5. The circuit board pickling apparatus according to claim 1, wherein The heat exchange assembly (5) comprises: A communication pipe (522) is rigidly arranged and connected with the first driving rod (31). A support frame (53) is connected with the communication pipe (522). A plurality of heat exchange pipes (52) are connected with the support frame (53). The heat exchange pipes (52) are in communication with the communication pipe (522). The density of the support frame (53) is less than the density of the pickling liquid.

6. A method of pickling a circuit board, characterized by, The circuit board pickling equipment of any one of claims 1-5 is used, comprising the following steps: Step one, pickling the components. Acid mist-containing pickling waste gas is collected during the pickling process. Step two, the waste gas is transported to the mixing assembly (4) of the pickling tank. The waste gas is mixed with the lye through the mixing assembly (4). Heat is released during the mixing process. Step three, the liquid in the mixing assembly (4) is transported to flow through the driving assembly (3) to the heat exchange assembly (5). The driving assembly (3) is driven to reciprocate by the liquid, which drives the heat exchange assembly (5) to reciprocate, disturbs the waste water in the sedimentation tank (1), and the liquid is heated by the heat exchange assembly (5).

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