Purity detection device with self-cleaning function for zinc oxide production

Abstract

The invention discloses a purity detection device with a self-cleaning function for zinc oxide production, and relates to the technical field of zinc oxide detection.The purity detection device with the self-cleaning function for zinc oxide production comprises a main machine body, an overturning disc, a sliding end cover, a protective shell and a detection container, the sliding end cover and the protective shell are both installed on the overturning disc, the detection container is installed in the protective shell, the sliding end cover is further connected with a water pipe, the sliding end cover blocks the detection container, a stirring and cleaning mechanism is further installed in the protective shell, the stirring and cleaning mechanism comprises a rotating rod and a stirring block, and the rotating rod is connected with the water pipe. The rotating rod penetrates through the bottom of the detection container, the stirring block is located in the detection container and connected with the rotating rod, an operator detects the pH value of a dissolved solution through an acidimeter, then titrates zinc ions through a standard solution, observes the discoloration of the solution, and calculates the purity of zinc oxide through a complexometric titration method.

Description

Technical Field

[0001] This invention relates to the field of zinc oxide detection technology, specifically a purity detection device for zinc oxide production with self-cleaning function. Background Technology

[0002] Zinc oxide purity testing is a core aspect of production quality control, especially for high-end applications such as pharmaceuticals and electronics. Traditional testing mainly relies on complexometric titration (such as EDTA titration). This method requires manually stirring and dissolving the zinc oxide sample with an acidic solution in an open container before calculating the purity through titration. Existing technologies have two major bottlenecks: First, the pretreatment efficiency is low. Sample dissolution depends on manual stirring or a fixed stirrer, making it difficult to achieve uniform mixing of the solution. This is especially true for batches that are difficult to dissolve, often requiring repeated operations, which is time-consuming, usually more than 30 minutes. Furthermore, the pH value needs to be manually adjusted before titration, making the process cumbersome. Secondly, cleaning residues affect accuracy. After titration, zinc oxide or precipitates easily remain on the inner wall of the container. Manual washing has blind spots, and trace residues can cause subsequent test data drift. While frequent container replacement can avoid contamination, it increases consumable costs and operational complexity. Currently, the market lacks integrated equipment to solve these problems. A few automated titrators only optimize the titration stage and do not involve sample pretreatment and container self-cleaning; while cleaning devices are mostly independent of the detection system, resulting in functional fragmentation and equipment redundancy. Therefore, there is an urgent need to develop a device that integrates efficient dissolution, detection, and self-cleaning to improve detection efficiency and result reliability. Summary of the Invention

[0003] The purpose of this invention is to provide a purity testing device for zinc oxide production with a self-cleaning function, so as to solve the problems raised in the prior art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a purity testing device for zinc oxide production with self-cleaning function, comprising a main body, a tilting disc, a sliding end cap, a protective shell, and a testing container. The tilting disc is rotatably mounted on the main body. The sliding end cap and the protective shell are both mounted on the tilting disc. The testing container is installed in the protective shell. A water pipe is also connected to the sliding end cap, which seals the testing container. A stirring and cleaning mechanism is also installed in the protective shell. The stirring and cleaning mechanism includes a rotating rod and a stirring block. The rotating rod penetrates the bottom of the testing container, and the stirring block is located in the testing container and connected to the rotating rod. The operator puts zinc oxide powder and an acidic solution into the testing container. The stirring and cleaning mechanism first stirs and dissolves the solution. After dissolution, the pH of the solution is measured using a pH meter. Then, zinc ions are titrated with a standard solution, and the color change of the solution is observed. The purity of zinc oxide is calculated using a complexometric titration method.

[0005] Furthermore, the stirring and cleaning mechanism includes a pair of electric telescopic rods, a motor bracket, and a hollow cup motor. The pair of electric telescopic rods are symmetrically mounted on the testing container via a bracket. The pair of electric telescopic rods are installed upside down. The motor bracket is mounted on the piston of the pair of electric telescopic rods. The hollow cup motor is mounted on the motor bracket and connected to the rotating rod. The bottom of the testing container is slidably sealed to the rotating rod. After zinc oxide powder and acidic solution are placed into the testing container, the sliding end cap closes the testing container tightly. The hollow cup motor drives the rotating rod to rotate, and the rotating rod drives the stirring block to rotate in the testing container. At the same time, the electric telescopic rod drives the motor bracket to move up and down. The stirring block moves up and down in the testing container while rotating, expanding the stirring range. The tilting plate rotates back and forth on the main body, causing the testing container to shake and accelerating the solvent dissolution rate. After the zinc oxide is dissolved, the sliding end cap is opened, and the operator calculates the purity of the zinc oxide using complexometric titration.

[0006] Furthermore, the stirring block has a through hole, and a pair of brush heads are slidably installed in the through hole. The brush heads are provided with bristles on the side that is far apart from each other, and a first spring is provided between the pair of brush heads.

[0007] Furthermore, a pair of soft plugs are provided on both sides of the through hole. The pair of soft plugs are rotatably connected to the stirring block. A torsion spring is provided at the rotatable connection between the soft plug and the stirring block. The pair of soft plugs seal the end face of the through hole. After the zinc oxide purity test is completed, the test container needs to be cleaned. The main body drives the flip plate to rotate, causing the test container to be inverted. The zinc oxide solution is slowly poured out. The sliding end cap closes the test container tightly. The water pipe connected to the sliding end cap injects water into the test container for cleaning.

[0008] Furthermore, an inner sliding hole is provided in the middle of the rotating rod, and an electromagnet is installed inside the rotating rod. The electromagnet is located below the inner sliding hole, and a magnetic slider is slidably installed in the inner sliding hole. Several limiting protrusions are provided on the outer contour of the magnetic slider. The magnetic slider slides only along the vertical direction of the inner sliding hole. When the electromagnet is energized, it attracts the magnetic slider and the ratchet ring. The magnetic slider and the ratchet ring move downwards at the same time, and the lower teeth contact the lower grooved teeth, causing the ratchet ring to deflect. The second spring is compressed. After deflection, the elastic abutment retracts into the ratchet ring along the oblique angle of the partition block. After the electromagnet is de-energized, the second spring pushes the adapter ring to reset, and the upper teeth of the ratchet ring contact the upper grooved teeth. The ratchet ring deflects again at a certain angle, so that the elastic abutment is blocked by the partition block and completely retracted into the ratchet ring.

[0009] Furthermore, the bottom of the stirring block is provided with a through groove that connects to the inner sliding hole. A pair of reversing wheels are rotatably arranged near the through groove on the stirring block. Each brush head is connected to a traction cable with a magnetic slider. Each traction cable passes around the reversing wheel. The elastic abutment releases the obstruction of the limiting protrusion, and the magnetic slider slides freely upward. The first spring pushes the two brush heads to both ends, and the brush bristles push through the soft plug and extend out of the stirring block. The hollow cup motor drives the rotating rod to rotate, and the rotating rod drives the stirring block to rotate in the detection container. At the same time, the electric telescopic rod drives the motor bracket to move up and down. The brush bristles clean the inside of the detection container. After one cleaning is completed, the sliding end cover is opened, the sewage is poured out, and after the sliding end cover is closed, water is refilled for a second cleaning of the inside.

[0010] Furthermore, an inner rotary groove is formed in the middle of the rotating rod. The inner rotary groove is located on the outer ring of the inner sliding hole. Several partition blocks are arranged between the inner rotary groove and the inner sliding hole, and the partition blocks are evenly distributed in a ring. A transition ring and a ratchet ring are installed in the inner rotary groove. The transition ring is slidably disposed in the inner rotary groove. A second spring is disposed between the transition ring and the bottom of the inner rotary groove. The ratchet ring is rotatably installed on the inner ring of the transition ring. After cleaning, the electromagnet is energized again, and the magnetic slider is attracted downwards. The two brush heads are pulled inward by the traction cable, and the bristles retract into the mixing block. The soft plug seals the through hole, and the ratchet ring moves downward. The lower teeth contact the lower grooved teeth, causing the ratchet ring to deflect. The elastic abutment gradually pops outward along the oblique angle of the partition block. After the electromagnet is de-energized, the upper teeth of the ratchet ring contact the upper grooved teeth, and the ratchet ring deflects again at a certain angle, causing the elastic abutment to pop out completely into the gap between the two partition blocks. The elastic abutment hits the limiting protrusion on the magnetic slider, preventing the magnetic slider from rising, and the bristles retract.

[0011] Furthermore, the ratchet ring has upper teeth above and lower teeth below. The top and bottom of the inner rotary groove have upper and lower groove-shaped teeth that engage with the upper and lower teeth. The inner ring of the ratchet ring has several elastic abutments that block the limiting protrusions. Through the agitation and cleaning mechanism, the magnetic slider and ratchet ring move simultaneously using an electromagnet to control the brush bristles. When the brush bristles pop out, the detection container is cleaned. After the brush bristles retract, the agitator stirs the zinc oxide, making the structure more compact and efficient, and achieving multiple functions in one machine.

[0012] Compared with the prior art, the beneficial effects of the present invention are: 1. The hollow cup motor drives the rotating rod to rotate, which in turn drives the stirring block to rotate in the test container. At the same time, the electric telescopic rod drives the motor bracket to move up and down. The stirring block moves up and down in the test container while rotating, expanding the stirring range. The tilting plate rotates back and forth on the main body, causing the test container to shake, which speeds up the solvent dissolution and improves the dissolution efficiency. 2. By setting up a stirring and cleaning mechanism, an electromagnet controls the simultaneous movement of the magnetic slider box and ratchet ring to control the brush bristles. When the brush bristles pop out, the detection container is cleaned. After the brush bristles are retracted, the stirring block stirs the zinc oxide, making the structure more compact and concentrated, and playing a multi-purpose role. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall appearance and structure of the present invention; Figure 2 This is a partial schematic diagram of the external structure of the present invention; Figure 3 This is a partial structural diagram of the present invention. Figure 1 ; Figure 4 This is a partial structural diagram of the present invention. Figure 2 ; Figure 5 This is a schematic diagram of the internal structure of the present invention. Figure 3 ; Figure 6 This is a schematic diagram of the internal structure of the present invention. Figure 4 ; Figure 7 This is a schematic diagram of the internal structure of the present invention. Figure 5 ; Figure 8 This is a schematic diagram of the internal structure of the present invention. Figure 6 .

[0014] In the diagram: 1. Main body; 2. Tilting disc; 3. Sliding end cap; 4. Protective shell; 5. Detection container; 6. Electric telescopic rod; 7. Motor bracket; 8. Hollow cup motor; 9. Rotating rod; 10. Stirring block; 11. Soft stopper; 12. Brush head; 13. Brush bristles; 14. First spring; 15. Reversing wheel; 16. Traction cable; 17. Magnetic slider; 18. Limiting protrusion; 19. Adapter ring; 20. Second spring; 21. Ratchet ring; 22. Elastic abutment; 23. Inner rotary groove; 24. Inner sliding hole; 25. Upper tooth; 26. Lower tooth; 27. Upper grooved tooth; 28. Lower grooved tooth; 29. ​​Partition block. Detailed Implementation

[0015] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0016] Example: Figures 1-8 As shown, this invention provides a technical solution: a purity testing device for zinc oxide production with a self-cleaning function, comprising a main body 1, a tilting disc 2, a sliding end cap 3, a protective shell 4, and a testing container 5. The tilting disc 2 is rotatably mounted on the main body 1. The sliding end cap 3 and the protective shell 4 are both mounted on the tilting disc 2. The testing container 5 is installed in the protective shell 4. A water pipe (not shown in the figure) is also connected to the sliding end cap 3, which seals the testing container 5. A stirring and cleaning mechanism is also installed in the protective shell 4. The stirring and cleaning mechanism includes a rotating rod 9 and a stirring block 10. The rotating rod 9 passes through the bottom of the testing container 5, and the stirring block 10 is located in the testing container 5 and connected to the rotating rod 9. The operator puts zinc oxide powder and an acidic solution into the testing container 5. The stirring and cleaning mechanism first stirs and dissolves the solution. After dissolution, the pH of the solution is measured using a pH meter. Then, zinc ions are titrated with a standard solution, and the color change of the solution is observed. The purity of zinc oxide is calculated using a complexometric titration method.

[0017] The stirring and cleaning mechanism includes a pair of electric telescopic rods 6, a motor bracket 7, and a hollow cup motor 8. The pair of electric telescopic rods 6 are symmetrically mounted on the testing container 5 via a bracket, and are installed upside down. The motor bracket 7 is mounted on the piston of the pair of electric telescopic rods 6. The hollow cup motor 8 is mounted on the motor bracket 7 and connected to a rotating rod 9. The bottom of the testing container 5 is slidably sealed to the rotating rod 9. A through hole is formed in the stirring block 10, and a pair of brush heads 12 are slidably installed in the through hole. Brush bristles 13 are provided on the opposite side of the pair of brush heads 12. A first spring 14 is provided between the pair of brush heads 12. A pair of soft plugs 11 are provided on both sides of the through hole, and are rotatably connected to the stirring block 10. A torsion spring is provided at the rotatable connection between the soft plugs 11 and the stirring block 10. The pair of soft plugs 11 seal the end face of the through hole. Zinc oxide powder... After the acidic solution is placed into the test container 5, the sliding end cap 3 closes the test container 5 tightly. The hollow cup motor 8 drives the rotating rod 9 to rotate, and the rotating rod 9 drives the stirring block 10 to rotate in the test container 5. At the same time, the electric telescopic rod 6 drives the motor bracket 7 to move up and down. The stirring block 10 moves up and down in the test container 5 while rotating, expanding the stirring range. The tilting plate 2 rotates back and forth on the main body 1, causing the test container 5 to shake and accelerate the dissolution of the solvent. After the zinc oxide is dissolved, the sliding end cap 3 is opened. The operator uses the complexometric titration method to calculate the purity of the zinc oxide. After the zinc oxide purity test is completed, the test container 5 needs to be cleaned. The main body 1 drives the tilting plate 2 to rotate, so that the test container 5 is inverted and the zinc oxide solution is slowly poured out. The sliding end cap 3 closes the test container 5 tightly, and the water pipe connected to the sliding end cap 3 injects water into the test container 5 for cleaning.

[0018] An inner sliding hole 24 is provided in the middle of the rotating rod 9. An electromagnet (not shown in the figure) is installed inside the rotating rod 9. The electromagnet is located below the inner sliding hole 24. A magnetic slider 17 is slidably installed in the inner sliding hole 24. Several limiting protrusions 18 are provided on the outer contour of the magnetic slider 17. The magnetic slider 17 slides only along the vertical direction of the inner sliding hole 24. A through groove communicating with the inner sliding hole 24 is provided at the bottom of the stirring block 10. A pair of reversing wheels 15 are rotatably provided near the through groove of the stirring block 10. A traction cable 16 is connected between each brush head 12 and the magnetic slider 17. Each traction cable 16 passes around the reversing wheel 15. When the electromagnet is energized, it attracts the magnetic slider 17 and the ratchet ring 21. The magnetic slider 17 and the ratchet ring 21 move downward at the same time. The lower tooth 26 contacts the lower groove tooth 28, causing the ratchet ring 21 to deflect. The second spring 20 is compressed. After deflection, the elastic abutment 22 moves along the partition. The angled edge of block 29 retracts into the ratchet ring 21. After the electromagnet is de-energized, the second spring 20 pushes the adapter ring 19 to reset. The upper teeth 25 of the ratchet ring 21 contact the upper groove teeth 27. The ratchet ring 21 deflects again at a certain angle, so that the elastic abutment 22 is blocked by the partition block 29 and completely retracted into the ratchet ring 21. The elastic abutment 22 releases its obstruction of the limiting protrusion 18, and the magnetic slider 17 slides freely upward. The first spring 14 pushes the two brush heads 12 to both ends, and the brush bristles 13 push open the soft plug 11 and extend out of the stirring block 10. The hollow cup motor 8 drives the rotating rod 9 to rotate, and the rotating rod 9 drives the stirring block 10 to rotate in the detection container 5. At the same time, the electric telescopic rod 6 drives the motor bracket 7 to move up and down. The brush bristles 13 clean the inside of the detection container 5. After one cleaning is completed, the sliding end cover 3 is opened, and the sewage is poured out. After the sliding end cover 3 is closed, water is refilled to clean the inside a second time.

[0019] The rotating rod 9 also has an inner rotating groove 23 in the middle, which is located on the outer ring of the inner sliding hole 24. Several partition blocks 29 are arranged between the inner rotating groove 23 and the inner sliding hole 24, and the partition blocks 29 are evenly distributed in a ring. A transition ring 19 and a ratchet ring 21 are installed in the inner rotating groove 23. The transition ring 19 is slidably disposed in the inner rotating groove 23. A second spring 20 is disposed between the transition ring 19 and the bottom of the inner rotating groove 23. The ratchet ring 21 is rotatably mounted on the inner ring of the transition ring 19. The ratchet ring 21 has an upper tooth 25 above it and a lower tooth 26 below it. The inner rotary groove 23 has upper grooved teeth 27 and lower grooved teeth 28 at its top and bottom, respectively, which engage with the upper tooth 25 and lower tooth 26. The inner ring of the ratchet ring 21 has several elastic abutments 22 that block the limiting protrusion 18. After cleaning, the electromagnet is energized again, and the magnetic slider 17 is pulled downwards. The magnetic slider 17 is then pulled... The pull cord 16 pulls the two brush heads 12 inward, the bristles 13 retract into the stirring block 10, the soft plug 11 closes to seal the through hole, the ratchet ring 21 moves downward, the lower tooth 26 contacts the lower grooved tooth 28, causing the ratchet ring 21 to deflect, and the elastic abutment 22 gradually pops outward along the oblique angle of the partition block 29. After the electromagnet is de-energized, the upper tooth 25 of the ratchet ring 21 contacts the upper grooved tooth 27, the ratchet ring 21 deflects again at a certain angle, causing the elastic abutment 22 to pop out completely into the two partitions. The gap between the blocks 29, the elastic abutment 22 and the limiting protrusion 18 on the magnetic slider 17 prevent the magnetic slider 17 from rising, and the brush bristles 13 retract. Through the setting of the stirring and cleaning mechanism, the magnetic slider 17 and the ratchet ring 21 are controlled by an electromagnet to move simultaneously to control the brush bristles 13. When the brush bristles 13 pop out, the detection container 5 is cleaned. After the brush bristles 13 retract, the stirring block 10 stirs the zinc oxide, making the structure more compact and concentrated, and playing a multi-purpose role.

[0020] The working principle of this invention is as follows: The operator puts zinc oxide powder and acidic solution into the detection container 5. The stirring and cleaning mechanism first stirs and dissolves the solution. After dissolution, the acidity or alkalinity of the solution is detected by a pH meter. Then, zinc ions are titrated with a standard solution, and the color change of the solution is observed. The purity of zinc oxide is calculated by complexometric titration.

[0021] After zinc oxide powder and acidic solution are placed into the test container 5, the sliding end cap 3 closes the test container 5 tightly. The hollow cup motor 8 drives the rotating rod 9 to rotate, and the rotating rod 9 drives the stirring block 10 to rotate in the test container 5. At the same time, the electric telescopic rod 6 drives the motor bracket 7 to move up and down. The stirring block 10 moves up and down in the test container 5 while rotating, expanding the stirring range. The tilting plate 2 rotates back and forth on the main body 1, causing the test container 5 to shake and accelerate the dissolution of the solvent. After the zinc oxide is dissolved, the sliding end cap 3 is opened. The operator uses complexometric titration to calculate the purity of the zinc oxide. After the zinc oxide purity test is completed, the test container 5 needs to be cleaned. The main body 1 drives the tilting plate 2 to rotate, causing the test container 5 to be inverted. The zinc oxide solution is slowly poured out. The sliding end cap 3 closes the test container 5 tightly, and the water pipe connected to the sliding end cap 3 injects water into the test container 5 for cleaning.

[0022] When the electromagnet is energized, it simultaneously attracts the magnetic slider 17 and the ratchet ring 21. Both the magnetic slider 17 and the ratchet ring 21 move downwards, and the lower tooth 26 contacts the lower grooved tooth 28, causing the ratchet ring 21 to deflect. The second spring 20 is compressed. After deflection, the elastic abutment 22 retracts into the ratchet ring 21 along the angle of the partition block 29. When the electromagnet is de-energized, the second spring 20 pushes the adapter ring 19 to reset, and the upper tooth 25 of the ratchet ring 21 contacts the upper grooved tooth 27. The ratchet ring 21 deflects again by a certain angle, causing the elastic abutment 22 to be blocked by the partition block 29 and completely retracted into the ratchet ring 21. Inside the container 5, the elastic abutment 22 releases its obstruction of the limiting protrusion 18, and the magnetic slider 17 slides freely upward. The first spring 14 pushes the two brush heads 12 to both ends, and the brush bristles 13 push open the soft plug 11 and extend out of the stirring block 10. The hollow cup motor 8 drives the rotating rod 9 to rotate, and the rotating rod 9 drives the stirring block 10 to rotate in the detection container 5. At the same time, the electric telescopic rod 6 drives the motor bracket 7 to move up and down. The brush bristles 13 clean the inside of the detection container 5. After one cleaning, the sliding end cover 3 is opened, the sewage is poured out, and after the sliding end cover 3 is closed, water is refilled to clean the inside a second time.

[0023] After cleaning, the electromagnet is energized again, and the magnetic slider 17 is attracted downwards. The magnetic slider 17 pulls the two brush heads 12 inwards via the traction cable 16, and the brush bristles 13 retract into the stirring block 10. The soft plug 11 closes to seal the through hole, and the ratchet ring 21 moves downwards. The lower tooth 26 contacts the lower grooved tooth 28, causing the ratchet ring 21 to deflect. The elastic abutment 22 gradually pops outwards along the oblique angle of the partition block 29. After the electromagnet is de-energized, the upper tooth 25 of the ratchet ring 21 contacts the upper grooved tooth 27, and the ratchet ring 21 deflects again at a certain angle. This causes the elastic abutment 22 to fully pop out into the gap between the two partition blocks 29. The elastic abutment 22 limits the limit protrusion 18 on the magnetic slider 17, preventing the magnetic slider 17 from rising. The brush bristles 13 retract. Through the setting of the stirring and cleaning mechanism, the magnetic slider 17 and the ratchet ring 21 are controlled to move simultaneously by an electromagnet to control the brush bristles 13. When the brush bristles 13 pop out, the detection container 5 is cleaned. After the brush bristles 13 retract, the stirring block 10 stirs the zinc oxide, making the structure more compact and concentrated, and playing a multi-purpose role.

[0024] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A purity testing device for zinc oxide production with self-cleaning function, characterized in that: The device includes a main body (1), a flip plate (2), a sliding end cap (3), a protective shell (4), and a detection container (5). The flip plate (2) is rotatably mounted on the main body (1). The sliding end cap (3) and the protective shell (4) are both mounted on the flip plate (2). The detection container (5) is installed in the protective shell (4). A water pipe is also connected to the sliding end cap (3). The sliding end cap (3) seals the detection container (5). A stirring and cleaning mechanism is also installed in the protective shell (4). The stirring and cleaning mechanism includes a rotating rod (9) and a stirring block (10). The rotating rod (9) passes through the bottom of the detection container (5). The stirring block (10) is located in the detection container (5) and is connected to the rotating rod (9).

2. The purity testing device for zinc oxide production with self-cleaning function according to claim 1, characterized in that: The stirring and cleaning mechanism includes a pair of electric telescopic rods (6), a motor bracket (7), and a hollow cup motor (8). The pair of electric telescopic rods (6) are symmetrically mounted on the detection container (5) by a bracket. The pair of electric telescopic rods (6) are installed upside down. The motor bracket (7) is mounted on the piston of the pair of electric telescopic rods (6). The hollow cup motor (8) is mounted on the motor bracket (7). The hollow cup motor (8) is connected to the rotating rod (9). The bottom of the detection container (5) is slidably and sealed to the rotating rod (9).

3. The purity testing device for zinc oxide production with self-cleaning function according to claim 1, characterized in that: The stirring block (10) has a through hole, and a pair of brush heads (12) are slidably installed in the through hole. The brush heads (12) are provided with bristles (13) on the side away from each other, and a first spring (14) is provided between the pair of brush heads (12).

4. The purity testing device for zinc oxide production with self-cleaning function according to claim 3, characterized in that: A pair of soft plugs (11) are provided on both sides of the through hole. The pair of soft plugs (11) are rotatably connected to the stirring block (10). A torsion spring is provided at the rotatable connection between the soft plugs (11) and the stirring block (10). The pair of soft plugs (11) seal the end face of the through hole.

5. The purity testing device for zinc oxide production with self-cleaning function according to claim 4, characterized in that: The rotating rod (9) has an inner sliding hole (24) in the middle. An electromagnet is installed inside the rotating rod (9). The electromagnet is located below the inner sliding hole (24). A magnetic slider (17) is slidably installed in the inner sliding hole (24). Several limiting protrusions (18) are provided on the outer contour of the magnetic slider (17). The magnetic slider (17) slides only along the vertical direction of the inner sliding hole (24).

6. The purity testing device for zinc oxide production with self-cleaning function according to claim 5, characterized in that: The bottom of the stirring block (10) is provided with a through groove that connects to the inner sliding hole (24). A pair of reversing wheels (15) are rotatably arranged near the through groove of the stirring block (10). Each brush head (12) is connected to a magnetic slider (17) by a traction cable (16). Each traction cable (16) passes around the reversing wheel (15).

7. The purity testing device for zinc oxide production with self-cleaning function according to claim 5, characterized in that: The rotating rod (9) is also provided with an inner rotating groove (23) in the middle. The inner rotating groove (23) is located on the outer ring of the inner sliding hole (24). Several partition blocks (29) are provided between the inner rotating groove (23) and the inner sliding hole (24). The partition blocks (29) are evenly distributed in a ring. A transition ring (19) and a ratchet ring (21) are installed in the inner rotating groove (23). The transition ring (19) is slidably disposed in the inner rotating groove (23). A second spring (20) is provided between the transition ring (19) and the bottom of the inner rotating groove (23). The ratchet ring (21) is rotatably installed on the inner ring of the transition ring (19).

8. The purity testing device for zinc oxide production with self-cleaning function according to claim 7, characterized in that: The ratchet ring (21) has an upper tooth (25) above it and a lower tooth (26) below it. The top and bottom of the inner rotary groove (23) are provided with an upper groove tooth (27) and a lower groove tooth (28). The upper groove tooth (27) and the lower groove tooth (28) cooperate with the upper tooth (25) and the lower tooth (26). The inner ring of the ratchet ring (21) is provided with several elastic abutments (22). The elastic abutments (22) block the limiting protrusion (18).

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