A PCB Photoresist Developing Waste Liquid Recycling and Treatment Device

Abstract

The present invention discloses a PCB photoresist developing waste liquid recycling and treatment device, which relates to the technical field of waste liquid recycling and treatment, and includes a treatment component, and a stirring component is arranged on the top of the treatment component. When the present invention is in use, the camera is started. When it is photographed that the surface of the extraction layer drops to the uppermost color marking strip, the PLC controller will control the two electromagnets to close, and then control the forward and reverse motor to start, driving the rotating rod and the pushing disk to rotate, generating an upward pushing force on the push rod, further pushing the buffer component and the liquid to move upward. When the forward and reverse motor automatically pauses, the stratification part and the surface of the extraction layer move up one grid at the same time. When the stratification part moves to the second color marking strip, the upper extraction layer can be discharged to the greatest extent, avoiding the discharge of the bottom phase layer. With the cooperation of the liquid separation mechanism and the camera, the integration of extraction and separation is realized, and there is no need for solution transfer.

Description

Technical Field

[0001] The present invention relates to the technical field of waste liquid recovery and treatment, and particularly to a device for recovering and treating PCB photoresist developing waste liquid. Background Art

[0002] PCB photoresist is a photosensitive material widely used in the manufacturing process of printed circuit boards. PCB photoresist development is a key step in the PCB manufacturing process, which involves immersing the exposed copper clad laminate into the developer solution. During the development process, the developer solution is used to wash away the uncured photoresist, and this process generates waste liquid mixed with photoresist components and the developer solution. Since the developing waste liquid contains a large amount of organic matter and alkaline substances, if directly discharged, it will cause serious pollution to the environment such as water bodies and soil, leading to problems such as water quality deterioration and soil alkalization, endangering the ecological balance and human health. Therefore, the waste liquid generated during the development process needs to be recovered and treated.

[0003] In the prior art, during the recovery and treatment process of PCB photoresist developing waste liquid, it is necessary to perform extraction treatment on the waste liquid to extract the photoresist components. However, after adding the extraction liquid to the waste liquid and then transferring the mixed solution to a separating funnel, waiting for it to stand and layer, and finally manually controlling the separating funnel to separate the extraction phase and the raffinate phase, during the transfer process of the mixed solution, leakage is likely to occur, causing environmental pollution. When manually operating the separating funnel for separation, it is very difficult to precisely control the outflow speed and stop position of the liquid, which easily leads to over-separation or under-separation of the extraction phase, affecting the recovery rate of the photoresist and also the treatment effect of the subsequent raffinate phase.

[0004] Therefore, we propose a device for recovering and treating PCB photoresist developing waste liquid to solve the problems raised in the above background art. Summary of the Invention

[0005] The purpose of the present invention is to provide a device for recovering and treating PCB photoresist developing waste liquid to solve the problems in the above background art that after adding an extraction agent to the PCB photoresist developing waste liquid, it is still necessary to transfer the mixed solution to a separating funnel, which is likely to cause leakage, resulting in environmental pollution, and when manually operating the separating funnel for separation, it is easy to cause over-separation or under-separation of the extraction phase, affecting the recovery rate of the photoresist and also the treatment effect of the subsequent raffinate phase.

[0006] To achieve the above purpose, the present invention provides the following technical solution: A device for recovering and treating PCB photoresist developing waste liquid, including a treatment component, a stirring component is arranged at the top of the treatment component, and a liquid separation mechanism and a liquid discharge component are arranged at the bottom of the treatment component;

[0007] The processing component includes an extraction and separation tank, a color marking strip is arranged on the outer surface of the extraction and separation tank, a liquid separation pipe is fixedly connected to the outer surface of the extraction and separation tank, and a solenoid valve is arranged on the outer surface of the liquid separation pipe;

[0008] The liquid separation mechanism includes a top-pushing component, a limiting component and a buffering component. The top-pushing component includes a base, a positive and negative motor is installed on the top of the base through an auxiliary plate, a rotating rod is fixedly installed at the output end of the positive and negative motor, a top-pushing disc is installed on the outer surface of the rotating rod through screws, two top-pushing grooves are opened on the outer surface of the top-pushing disc, limiting grooves are opened on both sides inside the two top-pushing grooves, moving grooves are opened on one side of the four limiting grooves, a plurality of clamping grooves are opened on the inner wall of one side of the four moving grooves, two support rings are movably sleeved on the outer surface of the top-pushing disc, and top-pushing rods are movably embedded in the two top-pushing grooves.

[0009] Preferably, the limiting component includes two fixing rings, electromagnets are fixedly installed inside the two fixing rings, moving blocks are arranged on the outer surfaces of both sides of the two electromagnets, clamping rods are fixedly installed on the outer surfaces of one sides of the four moving blocks, return springs are movably sleeved on the outer surfaces of the four clamping rods, magnets are fixedly installed on the outer surfaces of the other sides of the four moving blocks, every two adjacent moving blocks of the four moving blocks form a group, and two support rods are movably embedded in each of the two groups of moving blocks.

[0010] Preferably, the buffering component includes a top-pushing plate, a sealing ring is fixedly connected to the outer surface of the top-pushing plate, a plurality of support springs are fixedly connected to the edge of the bottom of the top-pushing plate, an elastic sealing pad is fixedly connected to the inner wall of the top-pushing plate near the bottom, a buffering plate is movably embedded in the top-pushing plate, a sealing sleeve is fixedly connected to the outer surface of the buffering plate, a buffering sponge is fixedly connected to the top of the buffering plate, a water-based buffering liquid is filled in the buffering sponge, a plurality of buffering grooves are opened on the inner wall of the top-pushing plate near the top surface, and a T-shaped groove is opened on the top of the top-pushing plate.

[0011] Preferably, two limiting rods are fixedly installed on the outer surfaces of the two top-pushing rods near the bottom ends, one ends of the four limiting rods are respectively movably embedded in the four limiting grooves, the two support rings are connected by bolts, the two support rings are both installed on the top of the base through screws, every two vertically distributed support rods of the four support rods form a group, the two ends of the two groups of support rods are respectively fixedly installed in the two top-pushing rods, the outer surfaces of the two fixing rings are respectively fixedly installed in the two top-pushing rods, and one ends of the four return springs are respectively fixedly connected to the outer surfaces of one sides of the four moving blocks.

[0012] Preferably, the other ends of the four reset springs are respectively fixedly connected to one side inside the four limiting rods. The outer surface of the sealing ring is in contact with the inner wall of the extraction separation tank. One ends of the plurality of support springs are fixedly connected to the bottom surface inside the extraction separation tank. The tops of the two push rods both movably penetrate into the extraction separation tank. The tops of the two push rods fixedly penetrate through the elastic sealing gasket into the inside of the push plate. The tops of the two push rods are fixedly installed at the bottom of the buffer plate. The outer surface of the sealing sleeve is in contact with the inner wall of the push plate. The top of the buffer sponge is fixedly connected to the top surface inside the push plate.

[0013] Preferably, an observation window is arranged on the outer surface of the extraction separation tank near the color marking strip. A feed pump is arranged on the outer surface of the extraction separation tank. A filter is arranged on the outer surface of the feed pump. The water inlet end of the filter is connected with a liquid inlet pipe through a flange. The output end of the feed pump is connected with a liquid outlet pipe through a flange. A metering pump is arranged on the rear surface of the feed pump. The input end of the metering pump is connected with a liquid extraction pipe through a flange. The output end of the metering pump is connected with a liquid discharge pipe through a flange. The water outlet end of the filter is connected with the input end of the feed pump through a flange. One ends of the liquid outlet pipe and the liquid discharge pipe both fixedly penetrate into the extraction separation tank.

[0014] Preferably, the stirring assembly includes a support frame. A hydraulic system is arranged on the top surface inside the support frame. A stirrer is arranged at the bottom end of the hydraulic system. A box cover is arranged on the outer surface of the stirrer. A damping rotating shaft is fixedly installed on the top of the box cover. A liquid receiving tray is arranged on the outer surface of the damping rotating shaft. A liquid discharge groove is formed in the top of the box cover away from the damping rotating shaft. An extraction pipe is fixedly connected to the top of the box cover. An activity hole is formed in the center of the top of the box cover.

[0015] Preferably, the outer surface of the stirrer is movably embedded in the activity hole. The box cover is installed on the top of the extraction separation tank through bolts. A circulation hole is formed in the outer surface of the liquid receiving tray. A PLC controller is arranged on the rear surface of the support frame. A shooting frame is arranged on the outer surface of the extraction separation tank. A camera is fixedly installed on the inner wall of the shooting frame. The shooting frame is installed on the outer surface of the support frame through bolts.

[0016] Preferably, the liquid discharging assembly includes a fixed pipe, the bottom end of the fixed pipe is fixedly connected with a telescopic pipe, the bottom end of the telescopic pipe is fixedly connected with a connecting pipe, a T-shaped rod is fixedly installed inside the connecting pipe, an installation ring is fixedly installed inside the fixed pipe, a fixed rod is movably embedded inside the installation ring, the top end of the fixed rod is fixedly connected with a T-shaped sealing block, a connecting spring is movably sleeved on the outer surface of the fixed rod, four L-shaped rods are fixedly installed at the bottom surface inside the fixed pipe, and one ends of the four L-shaped rods are all in contact with the edge of the bottom end of the fixed rod, and an L-shaped plate is fixedly installed on the outer surface of the connecting pipe.

[0017] Preferably, the top of the L-shaped plate is fixedly installed at the bottom of the extraction separation tank, the outer surface of the T-shaped sealing block near the top is in contact with the inside of the T-shaped groove, the outer surface of the T-shaped sealing block near the bottom is in contact with the inner wall of the fixed pipe, one end of the connecting spring is fixedly connected with the top of the installation ring, the other end of the connecting spring is fixedly connected with the bottom of the T-shaped sealing block, the top end of the T-shaped rod extends into the fixed pipe, the top end of the T-shaped rod is in contact with the bottom end of the fixed rod, the outer surface of the fixed pipe near the top end is fixedly installed at the bottom surface inside the T-shaped groove, the bottom end of the fixed pipe fixedly penetrates to the bottom of the top push plate, and the outer surface of the fixed pipe is movably embedded inside the buffer plate and the buffer sponge.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] 1. When the present invention is in use, start the camera, take pictures of the liquid in the extraction separation tank through the observation window, and transmit the images to the PLC controller. When the liquid is stratified, start the solenoid valve to discharge the extraction layer through the liquid separation pipe. When it is photographed that the surface of the extraction layer drops to the uppermost color marking strip, the PLC controller will control the two electromagnets to close, and then control the forward and reverse motor to start, drive the rotating rod and the top push disk to rotate, generate an upward top thrust on the top push rod, further push the buffer assembly to move upward, thereby pushing the liquid to move upward. When the forward and reverse motor automatically pauses, the stratification position and the surface of the extraction layer move up one grid at the same time. When the surface of the extraction layer drops to the color marking strip again, the PLC controller controls the forward and reverse motor to start again, and repeats the above operation process. When the stratification position moves to the second color marking strip, the upper extraction layer can be discharged to the greatest extent, avoiding discharging the bottom phase layer, and avoiding the situation of insufficient or excessive separation of the extraction layer. With the cooperation of the liquid separation mechanism and the camera, the extraction separation integration is realized, there is no need for solution transfer, avoiding the situation of leakage, and achieving the effect of automatic separation.

[0020] 2. When the present invention is used, the feed pump is started, and the liquid inlet pipe conveys the waste liquid to the filter for filtering treatment, and then enters the extraction separation box through the liquid outlet pipe. An appropriate amount of extractant is added through the extraction tube, and the agitator is started for mixing. After the extraction is completed, the metering pump is started, and the demulsifier is conveyed to the extraction separation box through the liquid suction pipe and the liquid discharge pipe. Under the stirring action of the agitator, the demulsifier is mixed with the mixed liquid, which speeds up the liquid stratification speed, reduces the waiting time, and is conducive to improving work efficiency. Start the hydraulic system, pull out the agitator, rotate the liquid receiving plate to the top of the movable hole, catch the liquid dripping from the agitator through the liquid receiving plate, and discharge the liquid into the liquid drain trough through the circulation hole to prevent the liquid from dripping into the extraction separation box and affecting the static stratification of the liquid in the box. Under the action of the processing component, the filtration, extraction and separation of the waste liquid are realized.

[0021] 3. When the present invention is used, the push rod generates thrust on the buffer plate when it moves upward, and squeezes the buffer sponge, further pushing the push plate and the sealing ring upward, thereby pushing the liquid to move. The buffer sponge is filled with a water-based buffer. When the buffer sponge is squeezed, it absorbs part of the energy of the external force through its own elastic deformation. At the same time, the water-based buffer flows and is compressed in the pores in the buffer sponge, which enhances the buffering effect. Through the joint action of the buffer sponge and the water-based buffer, the force transmitted to the top of the push plate has been greatly weakened, which is conducive to the smooth movement of the push plate, reduces the disturbance of the top liquid, reduces the possibility of liquid fluctuations, and is conducive to maintaining the stability of the liquid stratification. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A first-angle stereoscopic view of a PCB photoresist development waste liquid recovery and treatment device according to the present invention;

[0023] Figure 2 A second-angle stereoscopic view of a PCB photoresist development waste liquid recovery and treatment device according to the present invention;

[0024] Figure 3 This is a structural expanded stereogram of a stirring assembly in a PCB photoresist developing waste liquid recovery and treatment device of the present invention;

[0025] Figure 4 It is a structural unfolded stereoscopic diagram of a liquid receiving tray in a PCB photoresist developing waste liquid recovery and treatment device of the present invention;

[0026] Figure 5 It is a schematic cross-sectional view of the structure of an extraction and separation box in a PCB photoresist development waste liquid recovery and treatment device of the present invention;

[0027] Figure 6 It is a structural expansion stereogram of a liquid separation mechanism in a PCB photoresist development waste liquid recovery and treatment device of the present invention;

[0028] Figure 7 This is a schematic cross-sectional view of the buffer assembly in a device for recycling and treating waste liquid from PCB photoresist development according to the present invention;

[0029] Figure 8 This is a schematic cross-sectional view of the liquid discharge assembly in a device for recycling and treating waste liquid from PCB photoresist development according to the present invention;

[0030] Figure 9 This is a schematic cross-sectional view of the fixed pipe in a device for recycling and treating waste liquid from PCB photoresist development according to the present invention;

[0031] Figure 10 This is an unfolded three-dimensional view of the support ring in a device for recycling and treating waste liquid from PCB photoresist development according to the present invention;

[0032] Figure 11 This is an unfolded three-dimensional view of the limit assembly in a device for recycling and treating waste liquid from PCB photoresist development according to the present invention;

[0033] Figure 12 This is a schematic cross-sectional view of the push disk in a device for recycling and treating waste liquid from PCB photoresist development according to the present invention;

[0034] Figure 13 This is another angle schematic cross-sectional view of the push disk in a device for recycling and treating waste liquid from PCB photoresist development according to the present invention.

[0035] In the figure:

[0036] 1. Processing component; 101. Extraction and separation tank; 102. Color marking strip; 103. Liquid separation pipe; 104. Solenoid valve; 105. Observation window; 106. Feed pump; 107. Filter; 108. Liquid inlet pipe; 109. Liquid outlet pipe; 110. Metering pump; 111. Liquid suction pipe; 112. Drain pipe; 2. Stirring component; 201. Support frame; 202. Hydraulic system; 203. Stirrer; 204. Tank cover; 205. Damping rotating shaft; 206. Liquid receiving tray; 207. Drainage tank; 208. Extraction pipe; 209. Movable hole; 3. Liquid separation mechanism; 31. Pushing component; 311. Base; 312. Reversible motor; 313. Rotating rod; 314. Pushing plate; 315. Pushing groove; 316. Limiting groove; 317. Moving groove; 318. Card slot; 319. Support ring; 3110. Pushing rod; 3111. Limiting rod; 32. Limiting component; 321. Fixed ring; 322. Electromagnet; 323. Moving block; 324. Clamping rod; 325. Return spring; 326. Magnet; 327. Support rod; 33. Buffer component; 331. Pushing plate; 332. Sealing ring; 333. Support spring; 334. Elastic sealing pad; 335. Buffer plate; 336. Sealing sleeve; 337. Buffer sponge; 338. Buffer groove; 339. T-shaped groove; 4. Drainage component; 401. Fixed pipe; 402. Telescopic pipe; 403. Connecting pipe; 404. T-shaped rod; 405. Mounting ring; 406. Fixed rod; 407. T-shaped sealing block; 408. Connecting spring; 409. L-shaped rod; 410. L-shaped plate; 5. PLC controller; 6. Shooting frame; 7. Camera. Detailed implementation manners

[0037] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0038] Embodiment 1: Please refer to Figures 1 - 13As shown in the figure, the present invention provides a technical solution: a PCB photoresist developing waste liquid recovery and treatment device, including a processing component 1, a stirring component 2 is arranged on the top of the processing component 1, and a liquid separation mechanism 3 and a liquid discharge component 4 are arranged at the bottom of the processing component 1; the processing component 1 includes an extraction separation tank 101, a color marking strip 102 is arranged on the outer surface of the extraction separation tank 101, a liquid separation pipe 103 is fixedly connected to the outer surface of the extraction separation tank 101, and an electromagnetic valve 104 is arranged on the outer surface of the liquid separation pipe 103; the liquid separation mechanism 3 includes a top pushing component 31, a limiting component 32 and a buffer component 33. The top pushing component 31 includes a base 311, a positive and negative motor 312 is installed on the top of the base 311 through an auxiliary plate, a rotating rod 313 is fixedly installed at the output end of the positive and negative motor 312, a top pushing disc 314 is installed on the outer surface of the rotating rod 313 through screws, two top pushing grooves 315 are arranged on the outer surface of the top pushing disc 314, limiting grooves 316 are arranged on both sides inside the two top pushing grooves 315, moving grooves 317 are arranged on one side inside the four limiting grooves 316, a plurality of clamping grooves 318 are arranged on the inner wall of one side of the four moving grooves 317, two supporting rings 319 are movably sleeved on the outer surface of the top pushing disc 314, two top pushing rods 3110 are movably embedded in the two top pushing grooves 315 respectively. The limiting component 32 includes two fixing rings 321, electromagnets 322 are fixedly installed inside the two fixing rings 321, moving blocks 323 are arranged on the outer surfaces of both sides of the two electromagnets 322, clamping rods 324 are fixedly installed on the outer surfaces of the four moving blocks 323, return springs 325 are movably sleeved on the outer surfaces of the four clamping rods 324, magnets 326 are fixedly installed on the outer surfaces of the other sides of the four moving blocks 323, every two adjacent moving blocks 323 among the four moving blocks 323 form a group, and two supporting rods 327 are movably embedded in each of the two groups of moving blocks 323. The buffer component 33 includes a top pushing plate 331, a sealing ring 332 is fixedly connected to the outer surface of the top pushing plate 331, a plurality of supporting springs 333 are fixedly connected to the edge of the bottom of the top pushing plate 331, an elastic sealing pad 334 is fixedly connected to the inner wall of the top pushing plate 331 near the bottom, a buffer plate 335 is movably embedded in the top pushing plate 331, a sealing sleeve 336 is fixedly connected to the outer surface of the buffer plate 335, a buffer sponge 337 is fixedly connected to the top of the buffer plate 335, a water-based buffer liquid is filled in the buffer sponge 337, a plurality of buffer grooves 338 are arranged on the inner wall of the top pushing plate 331 near the top surface, a T-shaped groove 339 is arranged on the top of the top pushing plate 331, two limiting rods 3111 are fixedly installed on the outer surfaces of the two top pushing rods 3110 near the bottom ends respectively, and one ends of the four limiting rods 3111 are respectively movably embedded in the four limiting grooves 316. The two supporting rings 319 are connected by bolts, and both the two supporting rings 319 are installed on the top of the base 311 through screws. Every two vertically distributed supporting rods 327 among the four supporting rods 327 form a group, and both ends of the two groups of supporting rods 327 are respectively fixedly installed inside the two top pushing rods 3110.The outer surfaces of the two fixed rings 321 are respectively fixedly installed inside the two top push rods 3110. One ends of the four return springs 325 are respectively fixedly connected to the outer surfaces of one sides of the four moving blocks 323, and the other ends of the four return springs 325 are respectively fixedly connected to one sides inside the four limit rods 3111. The outer surface of the sealing ring 332 is in contact with the inner wall of the extraction and separation tank 101. One ends of the plurality of support springs 333 are all fixedly connected to the bottom surface inside the extraction and separation tank 101. The tops of the two top push rods 3110 both movably penetrate into the extraction and separation tank 101. The tops of the two top push rods 3110 both fixedly penetrate through the elastic sealing pad 334 into the inside of the top push plate 331. The tops of the two top push rods 3110 are both fixedly installed at the bottom of the buffer plate 335. The outer surface of the sealing sleeve 336 is in contact with the inner wall of the top push plate 331. The top of the buffer sponge 337 is fixedly connected to the top surface inside the top push plate 331. The PLC controller 5 is arranged on the rear surface of the support frame 201. The outer surface of the extraction and separation tank 101 is provided with a shooting frame 6. A camera 7 is fixedly installed on the inner wall of the shooting frame 6. The shooting frame 6 is installed on the outer surface of the support frame 201 through bolts.,

[0039] In this embodiment, during use, the solenoid valve 104, the feed pump 106, the metering pump 110, the hydraulic system 202, the stirrer 203, the forward and reverse motor 312, the electromagnet 322, the camera 7 and the PLC controller 5 are electrically connected. Push the pushing assembly 31 forward, so that the four limiting rods 3111 move from the limiting slots 316 into the moving slots 317 and then out of the moving slots 317, and the push rod 3110 and the push plate 314 can be separated, which is convenient for taking out the push plate 314 from the bottom of the extraction separation tank 101. Unscrew the bolts at the connection between the rotating rod 313 and the push plate 314, and remove the support ring 319 from the outer surface of the push plate 314, then the push plate 314 can be removed from the rotating rod 313, which is convenient for replacing or overhauling the push plate 314. First, energize the two electromagnets 322 to generate magnetism. The magnetism of the magnets 326 on both sides of the electromagnet 322 is the same as the magnetism generated on both sides of the electromagnet 322. According to the principle of like poles repelling each other, the magnetic repulsive force will push the two magnets 326 to move outward and push the two moving blocks 323 to move outward together, so that the corresponding return springs 325 are compressed and the latch rods 324 are ejected from the limiting rods 3111 and inserted into the corresponding card slots 318. With the cooperation of the latch rods 324 and the card slots 318, the limiting rods 3111 and the push rod 3110 are limited. Then start the processing assembly 1 to perform multi-stage treatment of the waste liquid, stir the waste liquid through the stirring assembly 2, and finally the hydraulic system 202 pulls the stirrer 203 out of the extraction separation tank 101, and let it stand for a while to wait for the waste liquid to stratify, forming an extraction layer and a bottom phase layer. There are five color-coded strips 102, each with a different color. In the order from top to bottom, the second color-coded strip 102 is the longest, and its position is flush with the lowest point of the liquid inlet of the liquid separation tube 103. After the liquid stratification is completed, the stratification position between the extraction layer and the bottom phase layer is flush with the lowermost color-coded strip 102, and the surface of the extraction layer is higher than the uppermost color-coded strip 102. During the extraction process, start the camera 7, take pictures of the liquid in the extraction separation tank 101 through the observation window 105, and transmit the images to the PLC controller 5. When it is photographed that the liquid has been completely stratified, start the solenoid valve 104, and discharge the upper extraction layer out of the extraction separation tank 101 through the liquid separation tube 103. As the extraction layer is discharged, the capacity of the extraction layer in the extraction separation tank 101 gradually decreases. When the camera 7 photographs that the surface of the extraction layer drops to the uppermost color-coded strip 102, the PLC controller 5 will control the two electromagnets 322 to turn off, the magnetism disappears, the compressed return spring 325 pushes the moving block 323 to move backward and reset, driving the latch rod 324 to move from the inside of the card slot 318 to the inside of the limiting rod 3111 to restore the original state.Next, control the forward and reverse motor 312 to start. The rotation of the output end of the forward and reverse motor 312 drives the rotating rod 313 to rotate, further driving the pushing disk 314 to rotate. Both the pushing groove 315 and the limiting groove 316 are curved and extend outward, from deep to shallow. The position closest to the center of the pushing disk 314 is the deepest, and the position closest to the edge is the shallowest. When the pushing disk 314 rotates, the push rod 3110 will gradually move towards the shallower part in the pushing groove 315, and at the same time, the limiting rod 3111 will gradually move towards the shallower part in the limiting groove 316. The output end of the forward and reverse motor 312 will automatically pause for a while every time it rotates a certain angle. When the forward and reverse motor 312 automatically pauses, the limiting rod 3111 moves to the next card slot 318. At this time, the electromagnet 322 is powered on again and generates magnetism again, causing the clamping rod 324 to insert into the card slot 318 at this place, limiting the limiting rod 3111 and the push rod 3110, which is beneficial to improving the stability of the buffer assembly 33 after movement. When the pushing disk 314 rotates, the push rod 3110 moves along the trajectory extending outward of the pushing groove 315 and moves upward under the upward pushing force, further pushing the buffer assembly 33 to move upward in the extraction separation tank 101, thereby pushing the liquid in the extraction separation tank 101 upward. When the forward and reverse motor 312 automatically pauses, the stratification position moves from the lowest color marking strip 102 to the upper color marking strip 102, and the surface of the extraction layer moves above the uppermost color marking strip 102 again, which is convenient for the upper extraction layer to be better discharged. When the camera 7 captures that the surface of the extraction layer drops to the uppermost color marking strip 102 again, the PLC controller 5 controls the forward and reverse motor 312 to start again and repeats the above operation process. When the stratification position moves to the second color marking strip 102, the forward and reverse motor 312 stops rotating, and the remaining extraction layer continues to be discharged through the liquid separation pipe 103. The position of the second color marking strip 102 is flush with the lowest part of the liquid inlet of the liquid separation pipe 103, so that the upper extraction layer can be discharged to the greatest extent, avoiding discharging the bottom phase layer, and avoiding the situation of insufficient or excessive separation of the extraction layer. With the cooperation of the liquid separation mechanism 3 and the camera 7, the integration of extraction and separation is realized, no solution transfer is required, the situation of leakage is avoided, the effect of automatic separation is achieved, and the problem that after adding an extractant to the PCB photoresist developing waste liquid, the mixed solution still needs to be transferred to a separating funnel, which is prone to leakage, causing environmental pollution, and when manually operating the separating funnel for separation, it is easy to cause excessive or insufficient separation of the extraction phase, affecting the recovery rate of the photoresist and the subsequent treatment effect of the raffinate phase is solved.After the extraction layer is discharged, the PLC controller 5 controls the limit component 32 to return to its original state, then controls the positive and negative motor 312 to rotate in the reverse direction, driving the push plate 314 to rotate in the reverse direction, so that the push rod 3110 and the limit rod 3111 move to the positions closest to the center of the push plate 314 inside the push slot 315 and the limit slot 316, and at the same time driving the buffer component 33 to slowly move downward, so that the bottom layer slowly moves downward, and the bottom layer is discharged through the liquid discharge component 4.

[0040] Embodiment 2: As Figures 1 - 5 shown, the processing component 1 includes an extraction and separation tank 101. A color marking strip 102 is arranged on the outer surface of the extraction and separation tank 101. A liquid separation pipe 103 is fixedly connected to the outer surface of the extraction and separation tank 101. An electromagnetic valve 104 is arranged on the outer surface of the liquid separation pipe 103. An observation window 105 is arranged on the outer surface of the extraction and separation tank 101 near the color marking strip 102. A feeding pump 106 is arranged on the outer surface of the extraction and separation tank 101. A filter 107 is arranged on the outer surface of the feeding pump 106. The water inlet end of the filter 107 is connected to a liquid inlet pipe 108 through a flange. The output end of the feeding pump 106 is connected to a liquid outlet pipe 109 through a flange. A metering pump 110 is arranged on the rear surface of the feeding pump 106. The input end of the metering pump 110 is connected to a liquid extraction pipe 111 through a flange. The output end of the metering pump 110 is connected to a liquid discharge pipe 112 through a flange. The water outlet end of the filter 107 is connected to the input end of the feeding pump 106 through a flange. One end of the liquid outlet pipe 109 and one end of the liquid discharge pipe 112 are both fixedly penetrated into the interior of the extraction and separation tank 101. The stirring component 2 includes a support frame 201. A hydraulic system 202 is arranged on the top surface inside the support frame 201. A stirrer 203 is arranged at the bottom end of the hydraulic system 202. A box cover 204 is arranged on the outer surface of the stirrer 203. A damping rotating shaft 205 is fixedly installed on the top of the box cover 204. A liquid receiving tray 206 is arranged on the outer surface of the damping rotating shaft 205. A liquid discharge groove 207 is opened at the top of the box cover 204 away from the damping rotating shaft 205. An extraction pipe 208 is fixedly connected to the top of the box cover 204. An activity hole 209 is opened at the center of the top of the box cover 204. The outer surface of the stirrer 203 is movably embedded in the interior of the activity hole 209. The box cover 204 is installed on the top of the extraction and separation tank 101 through bolts. A circulation hole is opened on the outer surface of the liquid receiving tray 206.

[0041] In this embodiment, during use, one end of the liquid inlet pipe 108 is connected to an external waste liquid tank, and one end of the liquid extraction pipe 111 is connected to a demulsifier storage barrel. The feeding pump 106 is started to suck the waste liquid into the liquid inlet pipe 108, and then it enters the filter 107 for filtration treatment to filter out the impurities in the waste liquid. The filtered waste liquid enters the extraction separation tank 101 through the liquid outlet pipe 109. Scale lines are provided beside the observation window 105. After an appropriate amount of waste liquid is added to the extraction separation tank 101, the feeding pump 106 is turned off. An appropriate amount of extractant is added to the extraction separation tank 101 through the extraction pipe 208, and at the same time, the stirrer 203 is started to mix the extractant with the waste liquid. After the extraction is completed, the metering pump 110 is started, and the demulsifier is pumped into the drain pipe 112 through the liquid extraction pipe 111 and finally delivered to the extraction separation tank 101. Under the stirring action of the stirrer 203, the demulsifier is mixed with the mixed liquid. The demulsifier can destroy the stability of the emulsion, cause the liquid droplets to coalesce and become larger, thereby accelerating the liquid stratification speed, reducing the waiting time, and being beneficial to improving work efficiency. Then, the hydraulic system 202 is started to pull the stirrer 203 out of the extraction separation tank 101 and the movable hole 209, so that the liquid in the extraction separation tank 101 is stratified. At the same time, the liquid receiving tray 206 is rotated to the top of the movable hole 209 and located at the bottom of the stirrer 203. At this time, the flow holes on the side of the liquid receiving tray 206 are located above the drain groove 207. The liquid dripping from the stirrer 203 is caught by the liquid receiving tray 206, and the liquid is discharged into the drain groove 207 through the flow holes. A collector is provided at the water outlet of the drain groove 207, and the liquid can be discharged, preventing the liquid of the stirrer 203 from dripping into the extraction separation tank 101 and affecting the static stratification of the liquid in the tank. When the stratification is completed, the solenoid valve 104 is opened, and the upper extraction layer is discharged through the liquid separation pipe 103. The extraction layer is slowly pushed to the liquid separation pipe 103 through the cooperation of the camera 7 and the liquid separation mechanism 3 to discharge the extraction layer to the greatest extent. The bottom phase layer is discharged through the drain assembly 4 for the next treatment. Under the action of the treatment assembly 1, the filtration, extraction, and separation treatment of the waste liquid are realized.

[0042] Embodiment 3: As Figures 6 - 9As shown, the buffer assembly 33 includes a pushing plate 331. A sealing ring 332 is fixedly connected to the outer surface of the pushing plate 331. A plurality of support springs 333 are fixedly connected to the edge of the bottom of the pushing plate 331. An elastic sealing pad 334 is fixedly connected to the inner wall of the pushing plate 331 near the bottom. A buffer plate 335 is movably embedded in the interior of the pushing plate 331. A sealing sleeve 336 is fixedly connected to the outer surface of the buffer plate 335. A buffer sponge 337 is fixedly connected to the top of the buffer plate 335. The interior of the buffer sponge 337 is filled with a water-based buffer solution. A plurality of buffer grooves 338 are formed in the inner wall of the pushing plate 331 near the top surface. A T-shaped groove 339 is formed in the top of the pushing plate 331. The liquid discharging assembly 4 includes a fixed pipe 401. A telescopic pipe 402 is fixedly connected to the bottom end of the fixed pipe 401. A connecting pipe 403 is fixedly connected to the bottom end of the telescopic pipe 402. A T-shaped rod 404 is fixedly installed in the interior of the connecting pipe 403. An installation ring 405 is fixedly installed in the interior of the fixed pipe 401. A fixed rod 406 is movably embedded in the interior of the installation ring 405. A T-shaped sealing block 407 is fixedly connected to the top end of the fixed rod 406. A connecting spring 408 is movably sleeved on the outer surface of the fixed rod 406. Four L-shaped rods 409 are fixedly installed at the bottom surface of the interior of the fixed pipe 401. One end of each of the four L-shaped rods 409 is in contact with the edge of the bottom end of the fixed rod 406. An L-shaped plate 410 is fixedly installed on the outer surface of the connecting pipe 403. The top of the L-shaped plate 410 is fixedly installed at the bottom of the extraction and separation tank 101. The outer surface of the T-shaped sealing block 407 near the top is in contact with the interior of the T-shaped groove 339. The outer surface of the T-shaped sealing block 407 near the bottom is in contact with the inner wall of the fixed pipe 401. One end of the connecting spring 408 is fixedly connected to the top of the installation ring 405. The other end of the connecting spring 408 is fixedly connected to the bottom of the T-shaped sealing block 407. The top end of the T-shaped rod 404 extends into the interior of the fixed pipe 401. The top end of the T-shaped rod 404 is in contact with the bottom end of the fixed rod 406. The outer surface of the fixed pipe 401 near the top end is fixedly installed at the bottom surface of the interior of the T-shaped groove 339. The bottom end of the fixed pipe 401 fixedly penetrates to the bottom of the pushing plate 331. The outer surface of the fixed pipe 401 is movably embedded in the interiors of the buffer plate 335 and the buffer sponge 337.

[0043] In this embodiment, when in use, when the pushing disk 314 pushes the push rod 3110 to move upward, a thrust is generated on the buffer plate 335, causing the buffer plate 335 and the sealing sleeve 336 to move upward inside the push plate 331, squeezing the buffer sponge 337, and further pushing the push plate 331 and the sealing ring 332 to move upward in the extraction separation tank 101, thereby pushing the liquid to move upward. The buffer sponge 337 has a porous structure, and these pores are filled with an aqueous buffer solution. When the buffer sponge 337 is squeezed, the pores inside it become smaller, and the skeleton structure deforms. In this process, the buffer sponge 337 absorbs part of the energy of the external force through its own elastic deformation. At the same time, a large amount of aqueous buffer solution absorbed in the buffer sponge 337 will flow and be compressed in the pores of the buffer sponge 337 when being squeezed. The aqueous buffer solution has a certain viscosity, and the internal friction force between liquid molecules will consume part of the energy, enhancing the buffering effect, so that the impact force at the bottom cannot be directly transmitted to the upper part of the push plate 331 completely. Through the combined action of the buffer sponge 337 and the aqueous buffer solution, the force transmitted to the top of the push plate 331 has been greatly weakened, and it is no longer as direct and strong as when there is no buffer, which is beneficial to the stable movement of the push plate 331, reduces the disturbance to the liquid at the top, reduces the possibility of the liquid generating fluctuations, is beneficial to maintaining the stability of the liquid stratification, and avoids large fluctuations at the stratification, affecting the liquid discharge. By driving the pushing disk 314 to rotate in the reverse direction by the forward and reverse motor 312, when the push rod 3110 and the limit rod 3111 move to the initial position, the liquid discharge assembly 4 returns to its original state, as Figure 8 shown, the top of the T-shaped rod 404 contacts the bottom of the fixed rod 406 again. As the pushing disk 314 continues to rotate in the reverse direction, the push rod 3110 and the limit rod 3111 move to the deepest position, pulling the buffer assembly 33 to move downward continuously, and driving the fixed tube 401 to move downward continuously, so that the fixed rod 406 is pushed upward by the T-shaped rod 404, thereby lifting the T-shaped seal block 407 from the fixed tube 401 and the T-shaped groove 339, and the connecting spring 408 is stretched and unfolded. At this time, the T-shaped groove 339, the fixed tube 401, the telescopic tube 402 and the connecting tube 403 are in a communicating state, and the bottom phase layer can be discharged through the liquid discharge assembly 4, which is convenient for the next step of processing. When the forward and reverse motor 312 is turned off, the limit assembly 32 is started again for limiting, which is convenient for stable liquid discharge. A round hole is opened at the top of the buffer plate 335, and a leak-proof ring is fixedly connected inside the round hole. The outer surface of the fixed tube 401 contacts the inner wall of the leak-proof ring. The sealing performance between the buffer plate 335 and the fixed tube 401 is increased through the leak-proof ring, preventing the aqueous buffer solution from flowing from between the buffer plate 335 and the fixed tube 401 to the bottom of the buffer plate 335 when the buffer sponge 337 is squeezed, affecting the subsequent buffering effect of the buffer sponge 337.

[0044] The effects achieved by the entire mechanism and its working principle are as follows: When the two electromagnets 322 are powered on, they generate magnetism, and the repulsive force pushes the two magnets 326 and the two moving blocks 323 to move outward, inserting the clamping rod 324 into the corresponding card slots 318 to limit the position-limiting rod 3111 and the top push rod 3110. The feeding pump 106 is started, and the liquid inlet pipe 108 conveys the waste liquid to the inside of the filter 107 for filtration treatment, and then enters the extraction separation tank 101 through the liquid outlet pipe 109. An appropriate amount of extractant is added to the extraction separation tank 101 through the extraction pipe 208, and at the same time, the stirrer 203 is started to mix the extractant with the waste liquid. After the extraction is completed, the metering pump 110 is started, and the demulsifier is pumped into the drain pipe 112 through the liquid extraction pipe 111 and finally conveyed to the extraction separation tank 101. Under the stirring action of the stirrer 203, the demulsifier is mixed with the mixed liquid to accelerate the liquid stratification speed. Then, the hydraulic system 202 is started to pull the stirrer 203 out of the extraction separation tank 101 and the movable hole 209, rotate the liquid receiving tray 206 to the top of the movable hole 209, and the liquid receiving tray 206 catches the liquid dripping from the stirrer 203. During the extraction process, the camera 7 is started to take pictures of the liquid in the extraction separation tank 101 through the observation window 105, and the image is transmitted to the PLC controller 5. When it is photographed that the liquid has been completely stratified, the solenoid valve 104 is started, and the upper extraction layer is discharged from the extraction separation tank 101 through the liquid separation pipe 103. As the extraction layer is discharged, the capacity of the extraction layer in the extraction separation tank 101 gradually decreases. When the camera 7 photographs that the surface of the extraction layer drops to the uppermost color marking strip 102, the PLC controller 5 controls the two electromagnets 322 to turn off, the magnetism disappears, and the compressed return spring 325 pushes the moving block 323 to move backward and reset, driving the clamping rod 324 to move from the inside of the card slot 318 to the inside of the position-limiting rod 3111 to restore the original state. Then, the forward and reverse motor 312 is controlled to start, driving the rotating rod 313 and the top push plate 314 to rotate, generating an upward top thrust on the top push rod 3110 and the position-limiting rod 3111. When the forward and reverse motor 312 automatically pauses, the position-limiting rod 3111 moves to the next card slot 318. At this time, the electromagnet 322 is powered on again to generate magnetism again, so that the clamping rod 324 is inserted into the card slot 318 at this place. When the top push rod 3110 moves upward, it will push the buffer assembly 33 and the liquid to move upward. When the forward and reverse motor 312 automatically pauses, the stratification position moves from the lowermost color marking strip 102 to the upper color marking strip 102, and the surface of the extraction layer moves above the uppermost color marking strip 102 again. When the camera 7 photographs that the surface of the extraction layer drops to the uppermost color marking strip 102 again, the PLC controller 5 controls the forward and reverse motor 312 to start again, repeating the above operation process.When the stratification position moves to the second color marking strip 102, the forward and reverse motor 312 stops rotating, and the remaining extraction layer continues to be discharged through the liquid separation pipe 103. The position of the second color marking strip 102 is flush with the lowest part of the liquid inlet of the liquid separation pipe 103, so that the upper extraction layer can be discharged to the greatest extent, avoiding discharging the bottom phase layer and preventing insufficient or excessive separation of the extraction layer. With the cooperation of the liquid separation mechanism 3 and the camera 7, the integration of extraction and separation is realized, without the need for solution transfer, avoiding leakage, and achieving the effect of automatic separation. When the top push plate 314 pushes the top push rod 3110 upward, the buffer plate 335 and the sealing sleeve 336 move upward inside the top push plate 331, squeezing the buffer sponge 337, further pushing the top push plate 331 and the sealing ring 332 upward in the extraction separation box 101, thereby pushing the liquid upward. The buffer sponge 337 absorbs part of the external force energy through its elastic deformation. At the same time, when the water-based buffer liquid is squeezed, it will flow and be compressed in the pores of the buffer sponge 337. The water-based buffer liquid has a certain viscosity, and the internal friction force between liquid molecules will consume part of the energy, enhancing the buffer effect. By driving the top push plate 314 to rotate in the reverse direction by the forward and reverse motor 312, when the top push rod 3110 and the limit rod 3111 move to the initial position, the liquid discharge assembly 4 returns to its original state, and the top of the T-shaped rod 404 contacts the bottom of the fixed rod 406 again. As the top push plate 314 continues to rotate in the reverse direction, the top push rod 3110 and the limit rod 3111 move to the deepest position, pulling the buffer assembly 33 to move downward continuously and driving the fixed pipe 401 to move downward continuously, so that the fixed rod 406 is pushed upward by the T-shaped rod 404, thereby pushing the T-shaped seal block 407 out of the fixed pipe 401 and the T-shaped groove 339, and the connecting spring 408 is stretched and unfolded. At this time, the T-shaped groove 339, the fixed pipe 401, the telescopic pipe 402, and the connecting pipe 403 are in a communicating state, and the bottom phase layer can be discharged through the liquid discharge assembly 4, facilitating the next step of processing.

[0045] Among them, the solenoid valve 104, the feeding pump 106, the filter 107, the metering pump 110, the hydraulic system 202, the agitator 203, the forward and reverse motor 312, the electromagnet 322, the camera 7, and the PLC controller 5 are all prior arts, and their components and operating principles are all publicly known technologies, and no further explanation will be given here.

[0046] Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A PCB photoresist developing waste liquid recovery and treatment device, including a treatment component (1), and a stirring component (2) is arranged at the top of the treatment component (1), characterized in that: A liquid separation mechanism (3) and a liquid drainage component (4) are arranged at the bottom of the processing component (1). The processing component (1) includes an extraction and separation box (101). A color marking strip (102) is arranged on the outer surface of the extraction and separation box (101). A liquid separation pipe (103) is fixedly connected to the outer surface of the extraction and separation box (101). An electromagnetic valve (104) is arranged on the outer surface of the liquid separation pipe (103). The liquid separation mechanism (3) includes a pushing component (31), a limiting component (32), and a buffering component (33). The pushing component (31) includes a base (311). A positive and negative motor (312) is installed on the top of the base (311) through an auxiliary plate. A rotating rod (313) is fixedly installed at the output end of the positive and negative motor (312). A pushing disc (314) is installed on the outer surface of the rotating rod (313) through screws. Two pushing grooves (315) are formed on the outer surface of the pushing disc (314). Limiting grooves (316) are formed on both sides inside the two pushing grooves (315). Moving grooves (317) are formed on one side of the four limiting grooves (316). A plurality of clamping grooves (318) are formed on the inner wall of one side of the four moving grooves (317). Two support rings (319) are movably sleeved on the outer surface of the pushing disc (314). Two push rods (3110) are movably embedded in the two pushing grooves (315). The limiting component (32) includes two fixed rings (321). Electromagnets (322) are fixedly installed inside the two fixed rings (321). Moving blocks (323) are arranged on the outer surfaces of both sides of the two electromagnets (322). Clamping rods (324) are fixedly installed on the outer surfaces of one sides of the four moving blocks (323). Return springs (325) are movably sleeved on the outer surfaces of the four clamping rods (324). Magnets (326) are fixedly installed on the outer surfaces of the other sides of the four moving blocks (323). Every two adjacent moving blocks (323) among the four moving blocks (323) form a group. Two support rods (327) are movably embedded in the two groups of moving blocks (323). The buffering component (33) includes a pushing plate (331). A sealing ring (332) is fixedly connected to the outer surface of the pushing plate (331). A plurality of support springs (333) are fixedly connected to the edge of the bottom of the pushing plate (331). An elastic sealing pad (334) is fixedly connected to the inner wall of the pushing plate (331) near the bottom. A buffer plate (335) is movably embedded in the pushing plate (331). A sealing sleeve (336) is fixedly connected to the outer surface of the buffer plate (335). A buffer sponge (337) is fixedly connected to the top of the buffer plate (335). The buffer sponge (337) is filled with a water-based buffer solution. A plurality of buffer grooves (338) are formed on the inner wall of the pushing plate (331) near the top surface. A T-shaped groove (339) is formed on the top of the pushing plate (331). The stirring assembly (2) includes a support frame (201). A hydraulic system (202) is arranged on the top surface inside the support frame (201). A stirrer (203) is arranged at the bottom end of the hydraulic system (202). A tank cover (204) is arranged on the outer surface of the stirrer (203). A damping rotating shaft (205) is fixedly installed at the top of the tank cover (204). A liquid receiving tray (206) is arranged on the outer surface of the damping rotating shaft (205). A liquid discharge groove (207) is formed at the top of the tank cover (204) away from the damping rotating shaft (205). An extraction pipe (208) is fixedly connected to the top of the tank cover (204). An activity hole (209) is formed at the center of the top of the tank cover (204). The outer surface of the stirrer (203) is movably embedded inside the activity hole (209). The tank cover (204) is installed on the top of the extraction separation tank (101) by bolts. A circulation hole is formed on the outer surface of the liquid receiving tray (206). A PLC controller (5) is arranged on the rear surface of the support frame (201). A photographing frame (6) is arranged on the outer surface of the extraction separation tank (101). A camera (7) is fixedly installed on the inner wall of the photographing frame (6). The photographing frame (6) is installed on the outer surface of the support frame (201) by bolts.

2. The PCB photoresist developing waste liquid recycling and treatment device according to claim 1, characterized in that: Two limiting rods (3111) are fixedly installed on the outer surface of the two top push rods (3110) near the bottom end. One ends of the four limiting rods (3111) are respectively movably embedded inside the four limiting grooves (316). The two support rings (319) are connected by bolts. The two support rings (319) are both installed on the top of the base (311) by screws. The four support rods (327) are grouped into two groups with two vertically distributed support rods (327) in each group. Two ends of the two groups of support rods (327) are respectively fixedly installed inside the two top push rods (3110). The outer surfaces of the two fixing rings (321) are respectively fixedly installed inside the two top push rods (3110). One ends of the four return springs (325) are respectively fixedly connected to the outer surfaces of one sides of the four moving blocks (323).

3. The PCB photoresist developing waste liquid recycling and treatment device according to claim 2, wherein: The other ends of the four return springs (325) are respectively fixedly connected to one sides inside the four limiting rods (3111). The outer surface of the sealing ring (332) is in contact with the inner wall of the extraction separation tank (101). One ends of the multiple support springs (333) are all fixedly connected to the bottom surface inside the extraction separation tank (101). The top ends of the two top push rods (3110) both movably penetrate into the extraction separation tank (101). The top ends of the two top push rods (3110) both fixedly penetrate through the elastic sealing pad (334) into the inside of the top push plate (331). The top ends of the two top push rods (3110) are both fixedly installed at the bottom of the buffer plate (335). The outer surface of the sealing sleeve (336) is in contact with the inner wall of the top push plate (331). The top of the buffer sponge (337) is fixedly connected to the top surface inside the top push plate (331).

4. The PCB photoresist developing waste liquid recycling and treatment device according to claim 3, wherein: An observation window (105) is provided on the outer surface of the extraction and separation tank (101) near the color marking strip (102). A feeding pump (106) is provided on the outer surface of the extraction and separation tank (101). A filter (107) is provided on the outer surface of the feeding pump (106). The water inlet end of the filter (107) is connected to a liquid inlet pipe (108) through a flange. The output end of the feeding pump (106) is connected to a liquid outlet pipe (109) through a flange. A metering pump (110) is provided on the rear surface of the feeding pump (106). The input end of the metering pump (110) is connected to a liquid extraction pipe (111) through a flange. The output end of the metering pump (110) is connected to a liquid discharge pipe (112) through a flange. The water outlet end of the filter (107) is connected to the input end of the feeding pump (106) through a flange. One end of the liquid outlet pipe (109) and one end of the liquid discharge pipe (112) are both fixedly penetrated into the interior of the extraction and separation tank (101).

5. The PCB photoresist developing waste liquid recycling and treatment device according to claim 4, wherein: The liquid discharge assembly (4) includes a fixed pipe (401). The bottom end of the fixed pipe (401) is fixedly connected to a telescopic pipe (402). The bottom end of the telescopic pipe (402) is fixedly connected to a connecting pipe (403). A T-shaped rod (404) is fixedly installed inside the connecting pipe (403). An installation ring (405) is fixedly installed inside the fixed pipe (401). A fixed rod (406) is movably embedded inside the installation ring (405). The top end of the fixed rod (406) is fixedly connected to a T-shaped sealing block (407). A connecting spring (408) is movably sleeved on the outer surface of the fixed rod (406). Four L-shaped rods (409) are fixedly installed at the bottom surface inside the fixed pipe (401). One end of each of the four L-shaped rods (409) is in contact with the edge of the bottom end of the fixed rod (406). An L-shaped plate (410) is fixedly installed on the outer surface of the connecting pipe (403).

6. The PCB photoresist developing waste liquid recycling and treatment device according to claim 5, characterized in that: The top of the L-shaped plate (410) is fixedly installed at the bottom of the extraction and separation tank (101). The outer surface of the T-shaped sealing block (407) near the top is in contact with the interior of the T-shaped groove (339). The outer surface of the T-shaped sealing block (407) near the bottom is in contact with the inner wall of the fixed pipe (401). One end of the connecting spring (408) is fixedly connected to the top of the installation ring (405). The other end of the connecting spring (408) is fixedly connected to the bottom of the T-shaped sealing block (407). The top end of the T-shaped rod (404) extends into the interior of the fixed pipe (401). The top end of the T-shaped rod (404) is in contact with the bottom end of the fixed rod (406). The outer surface of the fixed pipe (401) near the top end is fixedly installed at the bottom surface inside the T-shaped groove (339). The bottom end of the fixed pipe (401) is fixedly penetrated to the bottom of the top push plate (331). The outer surface of the fixed pipe (401) is movably embedded inside the buffer plate (335) and the buffer sponge (337).

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